/* roulang page: index */
:root {
            --bg-primary: #0F1115;
            --bg-secondary: #0B0D10;
            --bg-card: #14171D;
            --bg-card-hover: #181C23;
            --border-subtle: rgba(255, 255, 255, 0.08);
            --border-active: rgba(189, 255, 63, 0.45);
            --accent: #BDFF3F;
            --accent-soft: rgba(189, 255, 63, 0.12);
            --accent-glow: rgba(189, 255, 63, 0.25);
            --text-primary: #F5F7FA;
            --text-secondary: #B6BCC8;
            --text-muted: #7A8291;
            --danger: #FF4D5A;
            --info: #7C88FF;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-pill: 999px;
            --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 16px 40px rgba(0, 0, 0, 0.45);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Source Han Sans SC', 'Noto Sans CJK SC', sans-serif;
            --font-mono: 'Roboto Mono', 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --spacing-section: 72px;
            --spacing-section-mobile: 48px;
            --header-height: 76px;
            --container-max: 1280px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.75;
            overflow-x: hidden;
            min-height: 100vh;
        }

        img,
        svg {
            vertical-align: middle;
            max-width: 100%;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition-fast), opacity var(--transition-fast);
        }

        a:hover {
            color: #D8FF7A;
            opacity: 0.9;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section {
            padding: var(--spacing-section) 0;
        }

        .section--alt {
            background-color: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }

        .section--dark {
            background-color: var(--bg-primary);
        }

        .section__header {
            margin-bottom: 40px;
        }

        .section__eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent);
            background: var(--accent-soft);
            padding: 6px 16px;
            border-radius: var(--radius-pill);
            margin-bottom: 16px;
            border: 1px solid rgba(189, 255, 63, 0.2);
        }

        .section__eyebrow i {
            font-size: 11px;
        }

        .section__title {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.01em;
            color: var(--text-primary);
            margin-bottom: 0;
        }

        .section__desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.8;
            margin-top: 16px;
        }

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(15, 17, 21, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-subtle);
            min-height: var(--header-height);
            display: flex;
            align-items: center;
            transition: background var(--transition-fast);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            gap: 20px;
            width: 100%;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .site-logo__icon {
            width: 36px;
            height: 36px;
            background: var(--accent);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0B0D10;
            font-weight: 800;
            font-size: 18px;
            transform: skewX(-6deg);
            transition: transform var(--transition-fast);
        }

        .site-logo:hover .site-logo__icon {
            transform: skewX(-6deg) scale(1.05);
        }

        .site-logo__text {
            font-weight: 800;
            font-size: 20px;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            line-height: 1;
        }

        .site-logo__text span {
            color: var(--accent);
        }

        .nav-search {
            flex: 1;
            max-width: 520px;
            margin: 0 auto;
            position: relative;
        }

        .nav-search__input {
            width: 100%;
            height: 46px;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-pill);
            padding: 0 48px 0 20px;
            color: var(--text-primary);
            font-size: 14px;
            outline: none;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
        }

        .nav-search__input::placeholder {
            color: var(--text-muted);
        }

        .nav-search__input:focus {
            border-color: var(--border-active);
            box-shadow: 0 0 0 4px var(--accent-glow);
            transform: scale(1.015);
        }

        .nav-search__btn {
            position: absolute;
            right: 6px;
            top: 50%;
            transform: translateY(-50%);
            background: var(--accent);
            color: #0B0D10;
            border: none;
            width: 34px;
            height: 34px;
            border-radius: 50%;
            cursor: pointer;
            font-size: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: background var(--transition-fast), transform var(--transition-fast);
        }

        .nav-search__btn:hover {
            background: #D8FF7A;
            transform: translateY(-50%) scale(1.06);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-shrink: 0;
            list-style: none;
        }

        .nav-menu__item {
            position: relative;
        }

        .nav-menu__link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 10px 16px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-pill);
            transition: color var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
        }

        .nav-menu__link:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-menu__link--active {
            color: var(--accent);
            background: var(--accent-soft);
        }

        .nav-menu__link--active:hover {
            color: var(--accent);
            background: var(--accent-soft);
        }

        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border-subtle);
            border-radius: 8px;
            color: var(--text-primary);
            font-size: 20px;
            width: 42px;
            height: 42px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: border-color var(--transition-fast);
        }

        .nav-toggle:hover {
            border-color: var(--border-active);
        }

        .mobile-nav {
            display: none;
            position: absolute;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: rgba(15, 17, 21, 0.98);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-subtle);
            padding: 16px 24px 24px;
            z-index: 999;
        }

        .mobile-nav.is-open {
            display: block;
        }

        .mobile-nav__search {
            margin-bottom: 16px;
        }

        .mobile-nav__list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-nav__link {
            display: block;
            padding: 12px 16px;
            font-size: 15px;
            color: var(--text-secondary);
            border-radius: 8px;
            transition: background var(--transition-fast), color var(--transition-fast);
        }

        .mobile-nav__link:hover {
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-primary);
        }

        .mobile-nav__link--active {
            color: var(--accent);
            background: var(--accent-soft);
        }

        /* Hero / Data Board */
        .hero {
            position: relative;
            background: var(--bg-secondary);
            overflow: hidden;
            min-height: calc(100vh - var(--header-height));
            display: flex;
            align-items: center;
            padding: 72px 0 56px;
        }

        .hero__bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/acb17f8ddec0bd8c.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            z-index: 0;
        }

        .hero__overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 13, 16, 0.82) 0%, rgba(11, 13, 16, 0.9) 55%, rgba(11, 13, 16, 0.96) 100%);
            z-index: 1;
        }

        .hero .container {
            position: relative;
            z-index: 2;
        }

        .hero__content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }

        .hero__text {
            max-width: 600px;
        }

        .hero__eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--accent);
            margin-bottom: 20px;
        }

        .hero__eyebrow .dot {
            width: 8px;
            height: 8px;
            background: var(--accent);
            border-radius: 50%;
            animation: pulse-dot 2s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.4;
                transform: scale(0.7);
            }
        }

        .hero__title {
            font-size: clamp(36px, 6vw, 64px);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin-bottom: 20px;
        }

        .hero__title .accent {
            color: var(--accent);
        }

        .hero__desc {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 560px;
            margin-bottom: 28px;
        }

        .hero__actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 24px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-pill);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            border: none;
            transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            white-space: nowrap;
        }

        .btn:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }

        .btn--primary {
            background: var(--accent);
            color: #0B0D10;
            border: 1px solid var(--accent);
        }

        .btn--primary:hover {
            background: #D8FF7A;
            border-color: #D8FF7A;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(189, 255, 63, 0.2);
        }

        .btn--primary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn--ghost {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .btn--ghost:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: var(--accent-soft);
            transform: translateY(-2px);
        }

        .hero__stats {
            display: flex;
            gap: 28px;
            flex-wrap: wrap;
        }

        .hero__stat {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .hero__stat-num {
            font-family: var(--font-mono);
            font-size: 22px;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: -0.02em;
        }

        .hero__stat-label {
            font-size: 12px;
            color: var(--text-muted);
            letter-spacing: 0.04em;
        }

        .hero__compare-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform var(--transition-smooth), border-color var(--transition-fast), box-shadow var(--transition-smooth);
        }

        .hero__compare-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-active);
            box-shadow: var(--shadow-card-hover);
        }

        .compare-card__header {
            padding: 20px 24px;
            border-bottom: 1px solid var(--border-subtle);
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .compare-card__tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            background: var(--accent-soft);
            padding: 4px 12px;
            border-radius: var(--radius-pill);
        }

        .compare-card__label {
            font-size: 13px;
            color: var(--text-muted);
        }

        .compare-card__body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .compare-row {
            display: grid;
            grid-template-columns: 1fr auto 1fr;
            align-items: center;
            gap: 16px;
        }

        .compare-row__team {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .compare-row__team-name {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
        }

        .compare-row__team-sub {
            font-size: 12px;
            color: var(--text-muted);
        }

        .compare-row__vs {
            font-size: 13px;
            font-weight: 700;
            color: var(--text-muted);
            letter-spacing: 0.02em;
        }

        .compare-progress {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .compare-progress__row {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 12px;
            color: var(--text-muted);
        }

        .compare-progress__bar {
            flex: 1;
            height: 6px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 3px;
            overflow: hidden;
        }

        .compare-progress__fill {
            height: 100%;
            border-radius: 3px;
            background: var(--accent);
            transition: width 0.8s ease;
        }

        .compare-progress__fill--danger {
            background: var(--danger);
        }

        .compare-progress__fill--info {
            background: var(--info);
        }

        .compare-card__footer {
            padding: 16px 24px;
            border-top: 1px solid var(--border-subtle);
            display: flex;
            justify-content: flex-end;
        }

        /* Metric Board */
        .metrics-board {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 16px;
            margin-top: 40px;
        }

        .metric-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 20px 22px;
            transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
        }

        .metric-card:hover {
            transform: translateY(-2px);
            border-color: var(--border-active);
            box-shadow: var(--shadow-card);
        }

        .metric-card__label {
            font-size: 12px;
            color: var(--text-muted);
            letter-spacing: 0.06em;
            margin-bottom: 8px;
        }

        .metric-card__value {
            font-family: var(--font-mono);
            font-size: 28px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        .metric-card__value .unit {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 500;
            letter-spacing: 0;
        }

        .metric-card__trend {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 600;
            margin-top: 6px;
        }

        .metric-card__trend--up {
            color: var(--accent);
        }

        .metric-card__trend--down {
            color: var(--danger);
        }

        /* Brand Intro */
        .brand-intro {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .brand-intro__text h2 {
            font-size: clamp(28px, 3.5vw, 36px);
            font-weight: 800;
            line-height: 1.28;
            color: var(--text-primary);
            margin-bottom: 18px;
        }

        .brand-intro__text p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 12px;
        }

        .brand-intro__visual {
            position: relative;
        }

        .brand-intro__img-wrap {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-subtle);
            box-shadow: var(--shadow-card);
        }

        .brand-intro__img-wrap img {
            width: 100%;
            height: 320px;
            object-fit: cover;
            display: block;
        }

        /* Service Matrix */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .service-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
            position: relative;
            overflow: hidden;
        }

        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--accent);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform var(--transition-smooth);
        }

        .service-card:hover::before {
            transform: scaleX(1);
        }

        .service-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-active);
            box-shadow: var(--shadow-card-hover);
        }

        .service-card__icon {
            width: 48px;
            height: 48px;
            background: var(--accent-soft);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--accent);
            margin-bottom: 16px;
        }

        .service-card__title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .service-card__desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* Comparison */
        .comparison-section {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 36px;
            overflow-x: auto;
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 680px;
        }

        .comparison-table th,
        .comparison-table td {
            padding: 14px 16px;
            text-align: left;
            border-bottom: 1px solid var(--border-subtle);
            font-size: 14px;
        }

        .comparison-table th {
            font-weight: 600;
            color: var(--text-muted);
            font-size: 12px;
            letter-spacing: 0.05em;
            text-transform: uppercase;
            background: var(--bg-secondary);
        }

        .comparison-table td {
            color: var(--text-secondary);
        }

        .comparison-table tr:hover td {
            background: rgba(255, 255, 255, 0.02);
        }

        .comparison-table .highlight {
            color: var(--accent);
            font-weight: 600;
        }

        .comparison-table .danger {
            color: var(--danger);
            font-weight: 600;
        }

        .comparison-table .info-text {
            color: var(--info);
            font-weight: 600;
        }

        /* Timeline */
        .timeline {
            position: relative;
            padding-left: 0;
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .timeline__item {
            position: relative;
            padding-left: 40px;
            padding-bottom: 20px;
            border-left: 2px solid rgba(255, 255, 255, 0.08);
        }

        .timeline__item:last-child {
            border-left-color: transparent;
            padding-bottom: 0;
        }

        .timeline__dot {
            position: absolute;
            left: -7px;
            top: 4px;
            width: 12px;
            height: 12px;
            background: var(--accent);
            border-radius: 50%;
            border: 2px solid var(--bg-primary);
            box-shadow: 0 0 0 3px var(--accent-soft);
        }

        .timeline__year {
            font-family: var(--font-mono);
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            letter-spacing: 0.04em;
        }

        .timeline__title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 4px 0 6px;
        }

        .timeline__desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* News List */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .news-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
        }

        .news-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-active);
            box-shadow: var(--shadow-card-hover);
        }

        .news-card__img {
            height: 180px;
            overflow: hidden;
            position: relative;
        }

        .news-card__img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
            transition: transform var(--transition-smooth);
        }

        .news-card:hover .news-card__img img {
            transform: scale(1.04);
        }

        .news-card__body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .news-card__meta {
            display: flex;
            gap: 12px;
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 8px;
        }

        .news-card__title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.5;
            margin-bottom: 8px;
        }

        .news-card__excerpt {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
        }

        .news-card__link {
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            margin-top: 12px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* Platform Assurance */
        .assurance-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .assurance-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 22px 20px;
            text-align: left;
            transition: transform var(--transition-fast), border-color var(--transition-fast);
        }

        .assurance-item:hover {
            transform: translateY(-2px);
            border-color: var(--border-active);
        }

        .assurance-item__icon {
            font-size: 22px;
            color: var(--accent);
            margin-bottom: 12px;
        }

        .assurance-item__title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

        .assurance-item__desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* Quick Answers */
        .quick-answers {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .quick-answer-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 20px 22px;
            transition: transform var(--transition-fast), border-color var(--transition-fast);
        }

        .quick-answer-item:hover {
            transform: translateY(-2px);
            border-color: var(--border-active);
        }

        .quick-answer-item__q {
            font-size: 14px;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 8px;
        }

        .quick-answer-item__a {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }

        .faq-item:hover {
            border-color: var(--border-active);
        }

        .faq-item__trigger {
            width: 100%;
            background: none;
            border: none;
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            text-align: left;
            color: var(--text-primary);
            font-size: 15px;
            font-weight: 600;
            transition: color var(--transition-fast);
        }

        .faq-item__trigger:hover {
            color: var(--accent);
        }

        .faq-item__icon {
            flex-shrink: 0;
            font-size: 14px;
            transition: transform var(--transition-fast);
        }

        .faq-item.is-open .faq-item__icon {
            transform: rotate(180deg);
            color: var(--accent);
        }

        .faq-item__panel {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-smooth);
        }

        .faq-item__panel-inner {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* Data Lab Banner */
        .lab-banner {
            background: var(--bg-card);
            border: 1px solid var(--border-active);
            border-radius: var(--radius-lg);
            padding: 32px 36px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            position: relative;
            overflow: hidden;
        }

        .lab-banner::after {
            content: '';
            position: absolute;
            right: -60px;
            top: -60px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: var(--accent-glow);
            pointer-events: none;
        }

        .lab-banner__text {
            flex: 1;
            min-width: 260px;
        }

        .lab-banner__title {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .lab-banner__desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 520px;
        }

        .lab-banner__action {
            flex-shrink: 0;
            z-index: 1;
        }

        /* Hot Events */
        .hot-events {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .hot-event-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
            cursor: pointer;
        }

        .hot-event-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-active);
            box-shadow: var(--shadow-card-hover);
        }

        .hot-event-card__img {
            height: 160px;
            overflow: hidden;
        }

        .hot-event-card__img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
            transition: transform var(--transition-smooth);
        }

        .hot-event-card:hover .hot-event-card__img img {
            transform: scale(1.04);
        }

        .hot-event-card__body {
            padding: 16px 20px;
        }

        .hot-event-card__label {
            font-size: 11px;
            font-weight: 600;
            color: var(--accent);
            letter-spacing: 0.06em;
            text-transform: uppercase;
            margin-bottom: 6px;
        }

        .hot-event-card__title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .hot-event-card__stats {
            font-size: 12px;
            color: var(--text-muted);
            font-family: var(--font-mono);
        }

        /* Partners */
        .partners-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 16px;
        }

        .partner-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            padding: 20px 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-muted);
            text-align: center;
            min-height: 64px;
            transition: border-color var(--transition-fast), color var(--transition-fast), background var(--transition-fast);
        }

        .partner-item:hover {
            border-color: var(--border-active);
            color: var(--text-primary);
            background: var(--bg-card-hover);
        }

        /* Form */
        .subscribe-form-wrap {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 40px 36px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .subscribe-form__text h2 {
            font-size: 26px;
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1.3;
            margin-bottom: 12px;
        }

        .subscribe-form__text p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .subscribe-form {
            display: flex;
            gap: 12px;
            width: 100%;
        }

        .subscribe-form__input {
            flex: 1;
            height: 48px;
            background: var(--bg-secondary);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-pill);
            padding: 0 20px;
            color: var(--text-primary);
            font-size: 14px;
            outline: none;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }

        .subscribe-form__input:focus {
            border-color: var(--border-active);
            box-shadow: 0 0 0 4px var(--accent-glow);
        }

        .subscribe-form__input::placeholder {
            color: var(--text-muted);
        }

        /* Data Note */
        .data-note {
            background: var(--bg-secondary);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 24px 28px;
        }

        .data-note__title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .data-note__text {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* Extra: Data Comparison strip */
        .data-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .data-strip__item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 20px;
            transition: transform var(--transition-fast), border-color var(--transition-fast);
        }

        .data-strip__item:hover {
            transform: translateY(-2px);
            border-color: var(--border-active);
        }

        .data-strip__label {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 6px;
        }

        .data-strip__value {
            font-family: var(--font-mono);
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
        }

        .data-strip__delta {
            font-size: 12px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            margin-top: 6px;
        }

        .data-strip__delta--up {
            color: var(--accent);
        }

        .data-strip__delta--down {
            color: var(--danger);
        }

        /* Reveal */
        .reveal {
            opacity: 0;
            transform: translateY(24px);
            transition: opacity 0.7s ease, transform 0.7s ease;
        }

        .reveal.is-visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 56px 0 28px;
        }

        .site-footer__grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .site-footer__brand .site-logo {
            margin-bottom: 12px;
        }

        .site-footer__brand p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 280px;
        }

        .site-footer__col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .site-footer__links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .site-footer__links a {
            font-size: 13px;
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }

        .site-footer__links a:hover {
            color: var(--accent);
        }

        .site-footer__bottom {
            border-top: 1px solid var(--border-subtle);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 12px;
            color: var(--text-muted);
        }

        .site-footer__bottom a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .site-footer__bottom a:hover {
            color: var(--accent);
        }

        .site-footer__legal {
            display: flex;
            flex-wrap: wrap;
            gap: 8px 20px;
            align-items: center;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            :root {
                --spacing-section: 56px;
            }

            .hero__content {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .hero {
                padding: 56px 0 40px;
                min-height: auto;
            }

            .services-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .hot-events {
                grid-template-columns: repeat(2, 1fr);
            }

            .assurance-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .partners-grid {
                grid-template-columns: repeat(3, 1fr);
            }

            .data-strip {
                grid-template-columns: repeat(2, 1fr);
            }

            .subscribe-form-wrap {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .site-footer__grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }

            .brand-intro {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .quick-answers {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            :root {
                --spacing-section: 44px;
                --header-height: 64px;
            }

            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .nav-menu {
                display: none;
            }

            .nav-search {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .hero {
                padding: 40px 0 32px;
            }

            .hero__title {
                font-size: 32px;
            }

            .hero__desc {
                font-size: 15px;
            }

            .hero__actions {
                gap: 10px;
            }

            .hero__stats {
                gap: 16px;
            }

            .services-grid {
                grid-template-columns: 1fr;
            }

            .news-grid {
                grid-template-columns: 1fr;
            }

            .hot-events {
                grid-template-columns: 1fr;
            }

            .assurance-grid {
                grid-template-columns: 1fr;
            }

            .partners-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .data-strip {
                grid-template-columns: 1fr;
            }

            .comparison-section {
                padding: 20px;
            }

            .lab-banner {
                padding: 24px 20px;
            }

            .subscribe-form-wrap {
                padding: 24px 20px;
            }

            .subscribe-form {
                flex-direction: column;
            }

            .site-footer__grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .site-footer__bottom {
                flex-direction: column;
                text-align: center;
                gap: 12px;
            }

            .site-footer__legal {
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .hero__title {
                font-size: 28px;
            }

            .hero__stats {
                flex-direction: column;
                gap: 10px;
            }

            .btn {
                padding: 10px 18px;
                font-size: 14px;
            }

            .metrics-board {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }

            .metric-card {
                padding: 14px 16px;
            }

            .metric-card__value {
                font-size: 22px;
            }

            .section__title {
                font-size: 24px;
            }

            .partners-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }

            .partner-item {
                padding: 14px 8px;
                font-size: 12px;
            }

            .compare-card__body {
                padding: 16px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #0F1115;
            --bg-secondary: #0B0D10;
            --bg-card: #14171D;
            --bg-card-hover: #181C23;
            --border-subtle: rgba(255, 255, 255, 0.08);
            --border-active: rgba(189, 255, 63, 0.45);
            --accent: #BDFF3F;
            --accent-soft: rgba(189, 255, 63, 0.12);
            --accent-glow: rgba(189, 255, 63, 0.25);
            --text-primary: #F5F7FA;
            --text-secondary: #B6BCC8;
            --text-muted: #7A8291;
            --danger: #FF4D5A;
            --info: #7C88FF;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-pill: 999px;
            --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 16px 40px rgba(0, 0, 0, 0.45);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Source Han Sans SC', 'Noto Sans CJK SC', sans-serif;
            --font-mono: 'Roboto Mono', 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --spacing-section: 72px;
            --spacing-section-mobile: 48px;
            --header-height: 76px;
            --container-max: 1280px;
        }

        :root {
            --spacing-section: 56px;
        }

        :root {
            --spacing-section: 44px;
            --header-height: 64px;
        }

        :root {
            --bg-primary: #0F1115;
            --bg-secondary: #0B0D10;
            --bg-card: #14171D;
            --bg-card-hover: #181C23;
            --border-subtle: rgba(255, 255, 255, 0.08);
            --border-active: rgba(189, 255, 63, 0.45);
            --accent: #BDFF3F;
            --accent-soft: rgba(189, 255, 63, 0.12);
            --accent-glow: rgba(189, 255, 63, 0.25);
            --text-primary: #F5F7FA;
            --text-secondary: #B6BCC8;
            --text-muted: #7A8291;
            --danger: #FF4D5A;
            --info: #7C88FF;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-pill: 999px;
            --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 16px 40px rgba(0, 0, 0, 0.45);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Source Han Sans SC', 'Noto Sans CJK SC', sans-serif;
            --font-mono: 'Roboto Mono', 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --spacing-section: 72px;
            --spacing-section-mobile: 48px;
            --header-height: 76px;
            --container-max: 1280px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.75;
            overflow-x: hidden;
            min-height: 100vh;
        }

        img,
        svg {
            vertical-align: middle;
            max-width: 100%;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition-fast), opacity var(--transition-fast);
        }

        a:hover {
            color: #D8FF7A;
            opacity: 0.9;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section {
            padding: var(--spacing-section) 0;
        }

        .section--alt {
            background-color: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }

        .section--dark {
            background-color: var(--bg-primary);
        }

        .section__header {
            margin-bottom: 40px;
        }

        .section__eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent);
            background: var(--accent-soft);
            padding: 6px 16px;
            border-radius: var(--radius-pill);
            margin-bottom: 16px;
            border: 1px solid rgba(189, 255, 63, 0.2);
        }

        .section__eyebrow i {
            font-size: 11px;
        }

        .section__title {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.01em;
            color: var(--text-primary);
            margin-bottom: 0;
        }

        .section__desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.8;
            margin-top: 16px;
        }

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(15, 17, 21, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-subtle);
            min-height: var(--header-height);
            display: flex;
            align-items: center;
            transition: background var(--transition-fast);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            gap: 20px;
            width: 100%;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .site-logo__icon {
            width: 36px;
            height: 36px;
            background: var(--accent);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0B0D10;
            font-weight: 800;
            font-size: 18px;
            transform: skewX(-6deg);
            transition: transform var(--transition-fast);
        }

        .site-logo:hover .site-logo__icon {
            transform: skewX(-6deg) scale(1.05);
        }

        .site-logo__text {
            font-weight: 800;
            font-size: 20px;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            line-height: 1;
        }

        .site-logo__text span {
            color: var(--accent);
        }

        .nav-search {
            flex: 1;
            max-width: 520px;
            margin: 0 auto;
            position: relative;
        }

        .nav-search__input {
            width: 100%;
            height: 44px;
            padding: 0 20px 0 48px;
            border-radius: var(--radius-pill);
            border: 1px solid var(--border-subtle);
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-primary);
            font-size: 14px;
            outline: none;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast), background var(--transition-fast);
        }

        .nav-search__input::placeholder {
            color: var(--text-muted);
            font-size: 14px;
        }

        .nav-search__input:focus {
            border-color: var(--border-active);
            box-shadow: 0 0 0 4px var(--accent-glow);
            background: rgba(255, 255, 255, 0.06);
            transform: scale(1.015);
        }

        .nav-search__icon {
            position: absolute;
            left: 18px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 15px;
            pointer-events: none;
            transition: color var(--transition-fast);
        }

        .nav-search__input:focus~.nav-search__icon {
            color: var(--accent);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-shrink: 0;
        }

        .nav-menu__link {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            border-radius: var(--radius-pill);
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            white-space: nowrap;
            transition: color var(--transition-fast), background var(--transition-fast);
        }

        .nav-menu__link:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.06);
            opacity: 1;
        }

        .nav-menu__link--active {
            color: #0B0D10;
            background: var(--accent);
            font-weight: 700;
        }

        .nav-menu__link--active:hover {
            color: #0B0D10;
            background: #D8FF7A;
            opacity: 1;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            width: 40px;
            height: 40px;
            font-size: 18px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: border-color var(--transition-fast), background var(--transition-fast);
        }

        .nav-toggle:hover {
            border-color: var(--border-active);
            background: var(--accent-soft);
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            padding: 20px 0 0;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .breadcrumb a:hover {
            color: var(--accent);
            opacity: 1;
        }

        .breadcrumb__sep {
            color: var(--text-muted);
            font-size: 11px;
        }

        .breadcrumb__current {
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* Category Hero */
        .category-hero {
            padding: 40px 0 28px;
        }

        .category-hero__title {
            font-size: clamp(32px, 5vw, 52px);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin-bottom: 0;
        }

        .category-hero__desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 780px;
            margin-top: 16px;
            line-height: 1.8;
        }

        /* Group Buy Card */
        .group-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 24px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
            margin-bottom: 32px;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }

        .group-card:hover {
            border-color: var(--border-active);
            box-shadow: var(--shadow-card);
        }

        .group-card__info {
            flex: 1;
            min-width: 220px;
        }

        .group-card__title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 4px;
        }

        .group-card__stats {
            font-size: 14px;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        .group-card__count {
            font-family: var(--font-mono);
            font-weight: 700;
            color: var(--accent);
            font-size: 16px;
        }

        .group-card__actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-pill);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            border: 1px solid transparent;
            transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            white-space: nowrap;
        }

        .btn--primary {
            background: var(--accent);
            color: #0B0D10;
            border-color: var(--accent);
        }

        .btn--primary:hover {
            background: #D8FF7A;
            border-color: #D8FF7A;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(189, 255, 63, 0.25);
            color: #0B0D10;
            opacity: 1;
        }

        .btn--secondary {
            background: transparent;
            color: var(--text-primary);
            border-color: var(--border-subtle);
        }

        .btn--secondary:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: var(--border-active);
            transform: translateY(-2px);
            color: var(--text-primary);
            opacity: 1;
        }

        /* Filter Bar */
        .filter-bar {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 16px 20px;
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 36px;
        }

        .filter-bar__label {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-muted);
            letter-spacing: 0.04em;
            margin-right: 4px;
        }

        .filter-bar__group {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .filter-chip {
            display: inline-flex;
            align-items: center;
            padding: 7px 16px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            background: transparent;
            border: 1px solid var(--border-subtle);
            cursor: pointer;
            transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
        }

        .filter-chip:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: var(--border-active);
            color: var(--text-primary);
        }

        .filter-chip--active {
            background: var(--accent-soft);
            border-color: var(--border-active);
            color: var(--accent);
            font-weight: 600;
        }

        /* Ranking List */
        .ranking-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .ranking-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 18px 22px;
            display: flex;
            align-items: center;
            gap: 18px;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
        }

        .ranking-item:hover {
            border-color: var(--border-active);
            box-shadow: var(--shadow-card);
            transform: translateY(-2px);
        }

        .ranking-item__rank {
            font-family: var(--font-mono);
            font-size: 26px;
            font-weight: 800;
            color: var(--text-muted);
            min-width: 48px;
            text-align: center;
            line-height: 1;
        }

        .ranking-item__rank--top1 {
            color: var(--accent);
        }

        .ranking-item__rank--top2 {
            color: #E8F5FF;
        }

        .ranking-item__rank--top3 {
            color: #FFCC80;
        }

        .ranking-item__thumb {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
            background: var(--bg-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .ranking-item__thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .ranking-item__meta {
            flex: 1;
            min-width: 0;
        }

        .ranking-item__name {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 3px;
        }

        .ranking-item__tags {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }

        .ranking-tag {
            display: inline-block;
            padding: 3px 10px;
            border-radius: var(--radius-pill);
            font-size: 11px;
            font-weight: 500;
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-secondary);
        }

        .ranking-tag--hot {
            background: rgba(189, 255, 63, 0.12);
            color: var(--accent);
        }

        .ranking-tag--up {
            background: rgba(189, 255, 63, 0.1);
            color: var(--accent);
        }

        .ranking-tag--down {
            background: rgba(255, 77, 90, 0.12);
            color: var(--danger);
        }

        .ranking-item__stats {
            display: flex;
            gap: 20px;
            flex-shrink: 0;
            align-items: center;
        }

        .ranking-stat {
            text-align: right;
        }

        .ranking-stat__label {
            font-size: 11px;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 2px;
        }

        .ranking-stat__value {
            font-family: var(--font-mono);
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
        }

        .ranking-stat__value--up {
            color: var(--accent);
        }

        .ranking-stat__value--down {
            color: var(--danger);
        }

        /* Data Summary Cards */
        .summary-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 18px;
            margin-bottom: 36px;
        }

        .summary-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 22px 24px;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }

        .summary-card:hover {
            border-color: var(--border-active);
            box-shadow: var(--shadow-card);
        }

        .summary-card__label {
            font-size: 12px;
            font-weight: 500;
            color: var(--text-muted);
            letter-spacing: 0.06em;
            text-transform: uppercase;
            margin-bottom: 8px;
        }

        .summary-card__value {
            font-family: var(--font-mono);
            font-size: clamp(24px, 3vw, 34px);
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1.2;
        }

        .summary-card__value span {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted);
        }

        .summary-card__trend {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            margin-top: 8px;
        }

        .summary-card__trend--up {
            color: var(--accent);
        }

        .summary-card__trend--down {
            color: var(--danger);
        }

        /* Featured Slider */
        .featured-slider {
            display: flex;
            gap: 18px;
            overflow-x: auto;
            padding-bottom: 12px;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
        }

        .featured-slider::-webkit-scrollbar {
            height: 4px;
        }

        .featured-slider::-webkit-scrollbar-track {
            background: var(--bg-secondary);
            border-radius: var(--radius-pill);
        }

        .featured-slider::-webkit-scrollbar-thumb {
            background: var(--border-subtle);
            border-radius: var(--radius-pill);
        }

        .featured-card {
            min-width: 280px;
            max-width: 320px;
            scroll-snap-align: start;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 20px;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            flex-shrink: 0;
        }

        .featured-card:hover {
            border-color: var(--border-active);
            box-shadow: var(--shadow-card);
            transform: translateY(-3px);
        }

        .featured-card__img {
            width: 100%;
            height: 140px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            background: var(--bg-secondary);
            margin-bottom: 14px;
        }

        .featured-card__img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .featured-card__title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .featured-card__meta {
            font-size: 12px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }

        .faq-item:hover {
            border-color: var(--border-active);
        }

        .faq-item__question {
            width: 100%;
            background: none;
            border: none;
            padding: 18px 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            transition: color var(--transition-fast);
        }

        .faq-item__question:hover {
            color: var(--accent);
        }

        .faq-item__icon {
            flex-shrink: 0;
            color: var(--text-muted);
            font-size: 14px;
            transition: transform var(--transition-fast), color var(--transition-fast);
        }

        .faq-item__answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-smooth), padding var(--transition-smooth);
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.8;
        }

        .faq-item__answer-inner {
            padding: 0 22px 18px;
        }

        .faq-item--open .faq-item__answer {
            max-height: 300px;
        }

        .faq-item--open .faq-item__icon {
            transform: rotate(180deg);
            color: var(--accent);
        }

        /* Subscribe Banner */
        .subscribe-banner {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 28px 32px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }

        .subscribe-banner__info {
            flex: 1;
            min-width: 220px;
        }

        .subscribe-banner__title {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 4px;
        }

        .subscribe-banner__desc {
            font-size: 14px;
            color: var(--text-secondary);
        }

        .subscribe-banner__form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            align-items: center;
        }

        .subscribe-banner__input {
            width: 260px;
            height: 44px;
            padding: 0 18px;
            border-radius: var(--radius-pill);
            border: 1px solid var(--border-subtle);
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-primary);
            font-size: 14px;
            outline: none;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }

        .subscribe-banner__input:focus {
            border-color: var(--border-active);
            box-shadow: 0 0 0 4px var(--accent-glow);
        }

        /* Tag Cloud */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag-cloud__item {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
        }

        .tag-cloud__item:hover {
            background: var(--accent-soft);
            border-color: var(--border-active);
            color: var(--accent);
            transform: translateY(-2px);
            opacity: 1;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 48px 0 24px;
        }

        .site-footer__grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 36px;
        }

        .site-footer__brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-top: 12px;
            max-width: 300px;
        }

        .site-footer__col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
        }

        .site-footer__links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .site-footer__links li {
            margin-bottom: 8px;
        }

        .site-footer__links a {
            font-size: 14px;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .site-footer__links a:hover {
            color: var(--accent);
            opacity: 1;
        }

        .site-footer__bottom {
            border-top: 1px solid var(--border-subtle);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }

        .site-footer__legal {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .site-footer__bottom a {
            color: var(--text-muted);
            font-size: 13px;
        }

        .site-footer__bottom a:hover {
            color: var(--accent);
            opacity: 1;
        }

        /* Reveal Animation */
        .reveal-on-scroll {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }

        .reveal-on-scroll--visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .site-header .container {
                gap: 14px;
            }

            .nav-search {
                max-width: 360px;
            }

            .nav-menu__link {
                padding: 8px 10px;
                font-size: 13px;
            }

            .site-footer__grid {
                grid-template-columns: 1.5fr 1fr 1fr;
            }

            .site-footer__brand {
                grid-column: 1 / -1;
            }

            .ranking-item__stats {
                gap: 12px;
            }

            .ranking-stat__value {
                font-size: 14px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --spacing-section: 48px;
                --header-height: 64px;
            }

            .site-header .container {
                flex-wrap: wrap;
                gap: 10px;
                padding-top: 10px;
                padding-bottom: 10px;
            }

            .site-logo {
                order: 1;
            }

            .nav-toggle {
                display: flex;
                order: 2;
                margin-left: auto;
            }

            .nav-search {
                order: 3;
                max-width: 100%;
                width: 100%;
                flex-basis: 100%;
                margin: 0;
                display: none;
            }

            .nav-search--open {
                display: block;
            }

            .nav-menu {
                order: 4;
                width: 100%;
                flex-direction: column;
                gap: 4px;
                display: none;
                padding-top: 8px;
            }

            .nav-menu--open {
                display: flex;
            }

            .nav-menu__link {
                width: 100%;
                text-align: left;
                padding: 10px 14px;
                font-size: 14px;
                border-radius: var(--radius-sm);
            }

            .category-hero__title {
                font-size: clamp(28px, 6vw, 38px);
            }

            .group-card {
                flex-direction: column;
                align-items: flex-start;
            }

            .group-card__actions {
                width: 100%;
            }

            .group-card__actions .btn {
                flex: 1;
            }

            .filter-bar {
                flex-direction: column;
                align-items: flex-start;
            }

            .ranking-item {
                flex-wrap: wrap;
                gap: 12px;
                padding: 16px;
            }

            .ranking-item__stats {
                width: 100%;
                justify-content: flex-start;
                gap: 20px;
                flex-wrap: wrap;
            }

            .ranking-stat {
                text-align: left;
            }

            .subscribe-banner {
                flex-direction: column;
                align-items: flex-start;
            }

            .subscribe-banner__form {
                width: 100%;
            }

            .subscribe-banner__input {
                flex: 1;
                width: auto;
                min-width: 180px;
            }

            .site-footer__grid {
                grid-template-columns: 1fr 1fr;
            }

            .site-footer__brand {
                grid-column: 1 / -1;
            }

            .site-footer__bottom {
                flex-direction: column;
                align-items: flex-start;
            }

            .site-footer__legal {
                flex-direction: column;
                gap: 6px;
            }
        }

        @media (max-width: 520px) {
            :root {
                --spacing-section: 36px;
            }

            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .section__title {
                font-size: 26px;
            }

            .category-hero {
                padding: 28px 0 20px;
            }

            .category-hero__title {
                font-size: 26px;
            }

            .breadcrumb {
                font-size: 12px;
                gap: 6px;
                padding-top: 14px;
            }

            .group-card {
                padding: 18px 20px;
            }

            .group-card__actions {
                flex-direction: column;
            }

            .filter-bar {
                padding: 12px 14px;
            }

            .filter-chip {
                padding: 6px 12px;
                font-size: 12px;
            }

            .ranking-item {
                padding: 14px;
                gap: 10px;
            }

            .ranking-item__rank {
                font-size: 20px;
                min-width: 36px;
            }

            .ranking-item__thumb {
                width: 42px;
                height: 42px;
            }

            .ranking-item__name {
                font-size: 15px;
            }

            .ranking-stat__value {
                font-size: 13px;
            }

            .summary-grid {
                grid-template-columns: 1fr;
            }

            .featured-card {
                min-width: 240px;
                max-width: 260px;
            }

            .subscribe-banner {
                padding: 20px;
            }

            .site-footer__grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .site-footer__brand {
                grid-column: auto;
            }

            .tag-cloud__item {
                padding: 6px 14px;
                font-size: 12px;
            }

            .btn {
                padding: 10px 18px;
                font-size: 14px;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #0F1115;
            --bg-secondary: #0B0D10;
            --bg-card: #14171D;
            --bg-card-hover: #181C23;
            --border-subtle: rgba(255, 255, 255, 0.08);
            --border-active: rgba(189, 255, 63, 0.45);
            --accent: #BDFF3F;
            --accent-soft: rgba(189, 255, 63, 0.12);
            --accent-glow: rgba(189, 255, 63, 0.25);
            --text-primary: #F5F7FA;
            --text-secondary: #B6BCC8;
            --text-muted: #7A8291;
            --danger: #FF4D5A;
            --info: #7C88FF;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-pill: 999px;
            --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 16px 40px rgba(0, 0, 0, 0.45);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Source Han Sans SC', 'Noto Sans CJK SC', sans-serif;
            --font-mono: 'Roboto Mono', 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --spacing-section: 72px;
            --spacing-section-mobile: 48px;
            --header-height: 76px;
            --container-max: 1280px;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.75;
            overflow-x: hidden;
            min-height: 100vh;
            margin: 0;
            padding: 0;
        }
        * {
            box-sizing: border-box;
        }
        img, svg {
            vertical-align: middle;
            max-width: 100%;
            display: inline-block;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition-fast), opacity var(--transition-fast);
        }
        a:hover {
            color: #D8FF7A;
            opacity: 0.9;
        }
        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        h1, h2, h3, h4, h5, h6 {
            margin-top: 0;
            margin-bottom: 0;
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-primary);
        }
        p {
            margin-top: 0;
            margin-bottom: 1rem;
        }
        ul, ol {
            margin: 0;
            padding: 0;
            list-style: none;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .section {
            padding: var(--spacing-section) 0;
        }
        .section--alt {
            background-color: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }
        .section--dark {
            background-color: var(--bg-primary);
        }
        .section__header {
            margin-bottom: 40px;
        }
        .section__eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent);
            background: var(--accent-soft);
            padding: 6px 16px;
            border-radius: var(--radius-pill);
            margin-bottom: 16px;
            border: 1px solid rgba(189, 255, 63, 0.2);
        }
        .section__eyebrow i {
            font-size: 11px;
        }
        .section__title {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.01em;
            color: var(--text-primary);
            margin-bottom: 0;
        }
        .section__desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.8;
            margin-top: 16px;
            margin-bottom: 0;
        }

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(15, 17, 21, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-subtle);
            min-height: var(--header-height);
            display: flex;
            align-items: center;
            transition: background var(--transition-fast);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            gap: 20px;
            width: 100%;
            flex-wrap: wrap;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .site-logo__icon {
            width: 36px;
            height: 36px;
            background: var(--accent);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0B0D10;
            font-weight: 800;
            font-size: 18px;
            transform: skewX(-6deg);
            transition: transform var(--transition-fast);
            flex-shrink: 0;
        }
        .site-logo:hover .site-logo__icon {
            transform: skewX(-6deg) scale(1.05);
        }
        .site-logo__text {
            font-weight: 800;
            font-size: 20px;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            line-height: 1;
            white-space: nowrap;
        }
        .site-logo__text span {
            color: var(--accent);
        }
        .nav-search {
            flex: 1;
            max-width: 520px;
            margin: 0 auto;
            position: relative;
            min-width: 200px;
        }
        .nav-search__input {
            width: 100%;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-pill);
            padding: 10px 44px 10px 20px;
            color: var(--text-primary);
            font-size: 14px;
            outline: none;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            height: 44px;
            line-height: 1.5;
        }
        .nav-search__input::placeholder {
            color: var(--text-muted);
            font-size: 14px;
        }
        .nav-search__input:focus {
            border-color: var(--border-active);
            box-shadow: 0 0 0 3px var(--accent-glow);
            transform: scale(1.015);
        }
        .nav-search__icon {
            position: absolute;
            right: 16px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            pointer-events: none;
            font-size: 14px;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .nav-menu__link {
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: var(--radius-pill);
            transition: color var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
        }
        .nav-menu__link:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-menu__link--active {
            color: var(--accent);
            background: var(--accent-soft);
            border: 1px solid rgba(189, 255, 63, 0.2);
        }
        .nav-toggle {
            display: none;
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-size: 22px;
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        /* Mobile navigation */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.6);
            z-index: 998;
        }
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border-subtle);
            z-index: 999;
            padding: 20px 24px;
            flex-direction: column;
            gap: 12px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
        }
        .mobile-nav.open {
            display: flex;
        }
        .mobile-nav .nav-search {
            max-width: 100%;
            width: 100%;
            margin: 0;
        }
        .mobile-nav .nav-menu {
            flex-direction: column;
            align-items: stretch;
            gap: 2px;
        }
        .mobile-nav .nav-menu__link {
            display: block;
            padding: 12px 16px;
            text-align: left;
            font-size: 15px;
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 16px;
        }
        .breadcrumb a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb__sep {
            color: var(--text-muted);
            font-size: 11px;
        }
        .breadcrumb__current {
            color: var(--accent);
            font-weight: 500;
        }

        /* Category hero (弱化版，不照搬首页 Hero) */
        .category-hero {
            background: var(--bg-secondary);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            margin-bottom: 32px;
            position: relative;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 280px;
            height: 100%;
            background: linear-gradient(135deg, transparent 60%, rgba(189, 255, 63, 0.04) 100%);
            pointer-events: none;
        }
        .category-hero__eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            background: var(--accent-soft);
            padding: 6px 16px;
            border-radius: var(--radius-pill);
            margin-bottom: 12px;
            border: 1px solid rgba(189, 255, 63, 0.2);
        }
        .category-hero__title {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-primary);
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .category-hero__desc {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 720px;
            margin-bottom: 0;
        }

        /* Filter bar */
        .filter-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            padding: 16px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            margin-bottom: 28px;
        }
        .filter-bar__group {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .filter-bar__label {
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 500;
            margin-right: 4px;
        }
        .filter-bar__btn {
            background: transparent;
            border: 1px solid var(--border-subtle);
            color: var(--text-secondary);
            font-size: 13px;
            font-weight: 500;
            padding: 7px 16px;
            border-radius: var(--radius-pill);
            cursor: pointer;
            transition: all var(--transition-fast);
            outline: none;
            white-space: nowrap;
        }
        .filter-bar__btn:hover {
            border-color: var(--border-active);
            color: var(--text-primary);
            background: rgba(189, 255, 63, 0.08);
        }
        .filter-bar__btn:focus {
            box-shadow: 0 0 0 3px var(--accent-glow);
            border-color: var(--border-active);
        }
        .filter-bar__btn--active {
            background: var(--accent-soft);
            border-color: var(--border-active);
            color: var(--accent);
        }
        .filter-bar__sort {
            background: transparent;
            border: 1px solid var(--border-subtle);
            color: var(--text-secondary);
            font-size: 13px;
            font-weight: 500;
            padding: 7px 16px;
            border-radius: var(--radius-pill);
            cursor: pointer;
            outline: none;
            transition: all var(--transition-fast);
        }
        .filter-bar__sort:hover {
            border-color: var(--border-active);
            color: var(--text-primary);
        }
        .filter-bar__sort option {
            background: var(--bg-card);
            color: var(--text-primary);
        }

        /* Data cards grid */
        .data-card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .data-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
            display: flex;
            flex-direction: column;
        }
        .data-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--border-active);
            background: var(--bg-card-hover);
        }
        .data-card__cover {
            height: 180px;
            overflow: hidden;
            position: relative;
            background: var(--bg-secondary);
        }
        .data-card__cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }
        .data-card:hover .data-card__cover img {
            transform: scale(1.04);
        }
        .data-card__body {
            padding: 20px 20px 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .data-card__meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 8px;
            flex-wrap: wrap;
        }
        .data-card__meta .badge {
            background: var(--accent-soft);
            color: var(--accent);
            padding: 2px 10px;
            border-radius: var(--radius-pill);
            font-size: 11px;
            font-weight: 600;
            border: 1px solid rgba(189, 255, 63, 0.18);
        }
        .data-card__meta .badge--info {
            background: rgba(124, 136, 255, 0.12);
            color: var(--info);
            border-color: rgba(124, 136, 255, 0.22);
        }
        .data-card__title {
            font-size: 17px;
            font-weight: 700;
            line-height: 1.4;
            color: var(--text-primary);
            margin-bottom: 8px;
            letter-spacing: -0.01em;
        }
        .data-card__excerpt {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
            flex: 1;
        }
        .data-card__footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: 14px;
            font-size: 12px;
            color: var(--text-muted);
        }
        .data-card__link {
            color: var(--accent);
            font-weight: 600;
            font-size: 13px;
            transition: color var(--transition-fast);
        }
        .data-card__link:hover {
            color: #D8FF7A;
        }

        /* Data summary blocks */
        .data-summary-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .data-summary-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 22px 20px;
            transition: border-color var(--transition-fast), transform var(--transition-fast);
        }
        .data-summary-card:hover {
            border-color: var(--border-active);
            transform: translateY(-2px);
        }
        .data-summary-card__value {
            font-family: var(--font-mono);
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 700;
            color: var(--accent);
            letter-spacing: -0.02em;
            margin-bottom: 4px;
        }
        .data-summary-card__label {
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 500;
        }
        .data-summary-card__trend {
            font-size: 12px;
            color: var(--danger);
            margin-top: 6px;
            font-weight: 500;
        }
        .data-summary-card__trend--up {
            color: var(--accent);
        }

        /* Horizontal scroll cards */
        .horizontal-scroll {
            display: flex;
            gap: 16px;
            overflow-x: auto;
            padding-bottom: 12px;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
        }
        .horizontal-scroll::-webkit-scrollbar {
            height: 4px;
        }
        .horizontal-scroll::-webkit-scrollbar-track {
            background: var(--bg-secondary);
            border-radius: 2px;
        }
        .horizontal-scroll::-webkit-scrollbar-thumb {
            background: var(--border-subtle);
            border-radius: 2px;
        }
        .horizontal-scroll::-webkit-scrollbar-thumb:hover {
            background: var(--accent-glow);
        }
        .feature-card {
            min-width: 300px;
            max-width: 340px;
            flex: 0 0 auto;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            overflow: hidden;
            scroll-snap-align: start;
            transition: transform var(--transition-fast), border-color var(--transition-fast);
        }
        .feature-card:hover {
            transform: translateY(-3px);
            border-color: var(--border-active);
        }
        .feature-card__cover {
            height: 160px;
            overflow: hidden;
            background: var(--bg-secondary);
        }
        .feature-card__cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }
        .feature-card:hover .feature-card__cover img {
            transform: scale(1.04);
        }
        .feature-card__body {
            padding: 16px 18px;
        }
        .feature-card__tag {
            display: inline-block;
            font-size: 11px;
            font-weight: 600;
            color: var(--accent);
            background: var(--accent-soft);
            padding: 2px 10px;
            border-radius: var(--radius-pill);
            margin-bottom: 8px;
            border: 1px solid rgba(189, 255, 63, 0.18);
        }
        .feature-card__title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.4;
            margin-bottom: 4px;
        }
        .feature-card__desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* Milestone timeline */
        .milestone-timeline {
            position: relative;
            padding-left: 28px;
        }
        .milestone-timeline::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background: var(--border-subtle);
        }
        .milestone-item {
            position: relative;
            padding: 0 0 24px 0;
        }
        .milestone-item:last-child {
            padding-bottom: 0;
        }
        .milestone-item::before {
            content: '';
            position: absolute;
            left: -24px;
            top: 6px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--accent);
            border: 2px solid var(--bg-primary);
            box-shadow: 0 0 0 2px var(--accent-soft);
        }
        .milestone-item__date {
            font-family: var(--font-mono);
            font-size: 13px;
            color: var(--accent);
            font-weight: 600;
            margin-bottom: 4px;
        }
        .milestone-item__title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .milestone-item__desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* Subscribe banner */
        .subscribe-banner {
            background: var(--bg-card);
            border: 1px solid var(--border-active);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            display: flex;
            align-items: center;
            gap: 24px;
            flex-wrap: wrap;
            position: relative;
            overflow: hidden;
        }
        .subscribe-banner::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 200px;
            height: 100%;
            background: linear-gradient(135deg, transparent 55%, rgba(189, 255, 63, 0.06) 100%);
            pointer-events: none;
        }
        .subscribe-banner__content {
            flex: 1;
            min-width: 260px;
        }
        .subscribe-banner__title {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .subscribe-banner__desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 0;
        }
        .subscribe-banner__action {
            flex-shrink: 0;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            border: none;
            outline: none;
            transition: all var(--transition-fast);
            text-decoration: none;
            line-height: 1.5;
        }
        .btn--primary {
            background: var(--accent);
            color: #0B0D10;
        }
        .btn--primary:hover {
            background: #D8FF7A;
            color: #0B0D10;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(189, 255, 63, 0.25);
        }
        .btn--primary:focus {
            box-shadow: 0 0 0 3px var(--accent-glow);
            outline: none;
        }
        .btn--primary:active {
            transform: translateY(0);
            box-shadow: none;
        }
        .btn--ghost {
            background: transparent;
            border: 1px solid var(--border-subtle);
            color: var(--text-primary);
        }
        .btn--ghost:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(189, 255, 63, 0.06);
        }
        .btn--ghost:focus {
            box-shadow: 0 0 0 3px var(--accent-glow);
            border-color: var(--border-active);
            outline: none;
        }

        /* Tags cloud */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .tag-cloud__item {
            display: inline-block;
            padding: 7px 16px;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-pill);
            color: var(--text-secondary);
            font-size: 13px;
            font-weight: 500;
            transition: all var(--transition-fast);
        }
        .tag-cloud__item:hover {
            border-color: var(--border-active);
            color: var(--accent);
            background: var(--accent-soft);
        }

        /* Section reveal */
        .reveal-section {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.5s ease, transform 0.5s ease;
        }
        .reveal-section.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 48px 0 24px;
            margin-top: 32px;
        }
        .site-footer__grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .site-footer__brand .site-logo {
            margin-bottom: 12px;
        }
        .site-footer__brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 0;
            max-width: 320px;
        }
        .site-footer__col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }
        .site-footer__links {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .site-footer__links a {
            font-size: 13px;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .site-footer__links a:hover {
            color: var(--accent);
        }
        .site-footer__bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            padding-top: 20px;
            border-top: 1px solid var(--border-subtle);
        }
        .site-footer__legal {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--text-muted);
        }
        .site-footer__bottom a {
            font-size: 13px;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .site-footer__bottom a:hover {
            color: var(--accent);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            :root {
                --spacing-section: 56px;
            }
            .data-card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .data-summary-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .site-footer__grid {
                grid-template-columns: 1fr 1fr 1fr;
            }
            .site-footer__brand {
                grid-column: 1 / -1;
            }
            .site-header .container {
                gap: 12px;
            }
            .nav-search {
                max-width: 320px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --spacing-section: 48px;
                --header-height: 64px;
            }
            .section {
                padding: var(--spacing-section) 0;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .nav-menu {
                display: none;
            }
            .nav-toggle {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }
            .nav-search {
                max-width: 100%;
                order: 2;
                flex: 1 1 100%;
                margin: 0;
            }
            .site-header .container {
                gap: 10px;
                flex-wrap: nowrap;
            }
            .site-logo {
                order: 1;
            }
            .nav-toggle {
                order: 3;
                margin-left: auto;
            }
            .data-card-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .data-summary-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .category-hero {
                padding: 24px 20px;
                border-radius: var(--radius-md);
            }
            .filter-bar {
                padding: 12px 14px;
                gap: 10px;
            }
            .filter-bar__group {
                width: 100%;
            }
            .feature-card {
                min-width: 250px;
                max-width: 280px;
            }
            .site-footer__grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .site-footer__brand {
                grid-column: 1 / -1;
            }
            .site-footer__bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .subscribe-banner {
                padding: 24px 20px;
                flex-direction: column;
                align-items: flex-start;
                gap: 16px;
            }
            .subscribe-banner__action {
                width: 100%;
            }
            .subscribe-banner__action .btn {
                width: 100%;
                justify-content: center;
            }
            .milestone-timeline {
                padding-left: 22px;
            }
            .milestone-item::before {
                left: -18px;
                width: 10px;
                height: 10px;
            }
            .section__title {
                font-size: 26px;
            }
            .category-hero__title {
                font-size: 26px;
            }
        }

        @media (max-width: 520px) {
            :root {
                --spacing-section: 40px;
            }
            .container {
                padding-left: 12px;
                padding-right: 12px;
            }
            .site-logo__text {
                font-size: 17px;
            }
            .site-logo__icon {
                width: 30px;
                height: 30px;
                font-size: 15px;
            }
            .data-summary-grid {
                grid-template-columns: 1fr;
            }
            .data-summary-card__value {
                font-size: 22px;
            }
            .filter-bar {
                flex-direction: column;
                align-items: stretch;
            }
            .filter-bar__sort {
                width: 100%;
            }
            .feature-card {
                min-width: 220px;
                max-width: 250px;
            }
            .category-hero__title {
                font-size: 22px;
            }
            .site-footer__grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .site-footer__legal {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
            .section__title {
                font-size: 22px;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #0F1115;
            --bg-secondary: #0B0D10;
            --bg-card: #14171D;
            --bg-card-hover: #181C23;
            --border-subtle: rgba(255, 255, 255, 0.08);
            --border-active: rgba(189, 255, 63, 0.45);
            --accent: #BDFF3F;
            --accent-soft: rgba(189, 255, 63, 0.12);
            --accent-glow: rgba(189, 255, 63, 0.25);
            --text-primary: #F5F7FA;
            --text-secondary: #B6BCC8;
            --text-muted: #7A8291;
            --danger: #FF4D5A;
            --info: #7C88FF;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-pill: 999px;
            --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 16px 40px rgba(0, 0, 0, 0.45);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Source Han Sans SC', 'Noto Sans CJK SC', sans-serif;
            --font-mono: 'Roboto Mono', 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --spacing-section: 72px;
            --spacing-section-mobile: 48px;
            --header-height: 76px;
            --container-max: 1280px;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.75;
            overflow-x: hidden;
            min-height: 100vh;
            margin: 0;
            padding: 0;
        }

        img,
        svg {
            vertical-align: middle;
            max-width: 100%;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition-fast), opacity var(--transition-fast);
        }

        a:hover {
            color: #D8FF7A;
            opacity: 0.9;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section {
            padding: var(--spacing-section) 0;
        }

        .section--alt {
            background-color: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }

        .section--dark {
            background-color: var(--bg-primary);
        }

        .section__header {
            margin-bottom: 40px;
        }

        .section__eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent);
            background: var(--accent-soft);
            padding: 6px 16px;
            border-radius: var(--radius-pill);
            margin-bottom: 16px;
            border: 1px solid rgba(189, 255, 63, 0.2);
        }

        .section__eyebrow i {
            font-size: 11px;
        }

        .section__title {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.01em;
            color: var(--text-primary);
            margin-bottom: 0;
        }

        .section__desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.8;
            margin-top: 16px;
        }

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(15, 17, 21, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-subtle);
            min-height: var(--header-height);
            display: flex;
            align-items: center;
            transition: background var(--transition-fast);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            gap: 20px;
            width: 100%;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .site-logo__icon {
            width: 36px;
            height: 36px;
            background: var(--accent);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0B0D10;
            font-weight: 800;
            font-size: 18px;
            transform: skewX(-6deg);
            transition: transform var(--transition-fast);
        }

        .site-logo:hover .site-logo__icon {
            transform: skewX(-6deg) scale(1.05);
        }

        .site-logo__text {
            font-weight: 800;
            font-size: 20px;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            line-height: 1;
        }

        .site-logo__text span {
            color: var(--accent);
        }

        .nav-search {
            flex: 1;
            max-width: 520px;
            margin: 0 auto;
            position: relative;
        }

        .nav-search__input {
            width: 100%;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-pill);
            padding: 12px 20px 12px 48px;
            color: var(--text-primary);
            font-size: 14px;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            outline: none;
            box-shadow: none;
        }

        .nav-search__input::placeholder {
            color: var(--text-muted);
        }

        .nav-search__input:focus {
            border-color: var(--border-active);
            box-shadow: 0 0 0 4px var(--accent-soft);
            transform: scale(1.01);
        }

        .nav-search__icon {
            position: absolute;
            left: 18px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 15px;
            pointer-events: none;
            transition: color var(--transition-fast);
        }

        .nav-search:focus-within .nav-search__icon {
            color: var(--accent);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: wrap;
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .nav-menu__link {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-pill);
            transition: color var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
        }

        .nav-menu__link:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.06);
        }

        .nav-menu__link--active {
            color: var(--accent);
            background: var(--accent-soft);
            font-weight: 600;
        }

        .nav-menu__link--active:hover {
            color: var(--accent);
            background: var(--accent-soft);
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            font-size: 20px;
            padding: 8px 12px;
            cursor: pointer;
            transition: border-color var(--transition-fast), color var(--transition-fast);
        }

        .nav-toggle:hover {
            border-color: var(--border-active);
            color: var(--accent);
        }

        /* Breadcrumb */
        .breadcrumb-bar {
            padding: 20px 0 0;
            background: transparent;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .breadcrumb li:not(:last-child)::after {
            content: '/';
            color: var(--text-muted);
            font-size: 12px;
        }

        .breadcrumb a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .breadcrumb a:hover {
            color: var(--accent);
        }

        .breadcrumb .current {
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* Category Hero */
        .category-hero {
            padding: 40px 0 32px;
            background: transparent;
            border-bottom: 1px solid var(--border-subtle);
        }

        .category-hero__title {
            font-size: clamp(32px, 5vw, 52px);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.015em;
            color: var(--text-primary);
            margin-bottom: 16px;
        }

        .category-hero__desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 760px;
            line-height: 1.8;
            margin: 0;
        }

        /* Filter Bar */
        .filter-bar {
            padding: 20px 0;
            background: transparent;
            border-bottom: 1px solid var(--border-subtle);
        }

        .filter-bar .container {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        .filter-bar__label {
            font-size: 13px;
            color: var(--text-muted);
            white-space: nowrap;
            margin-right: 4px;
            font-weight: 500;
        }

        .filter-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-pill);
            color: var(--text-secondary);
            font-size: 13px;
            cursor: pointer;
            transition: border-color var(--transition-fast), color var(--transition-fast), background var(--transition-fast);
            user-select: none;
        }

        .filter-chip:hover {
            border-color: var(--border-active);
            color: var(--text-primary);
            background: var(--bg-card-hover);
        }

        .filter-chip--active {
            border-color: var(--accent);
            color: var(--accent);
            background: var(--accent-soft);
        }

        /* News Cards */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .news-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
            display: flex;
            flex-direction: column;
        }

        .news-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-active);
            box-shadow: var(--shadow-card-hover);
        }

        .news-card__image {
            aspect-ratio: 16/9;
            overflow: hidden;
            background: var(--bg-secondary);
            position: relative;
        }

        .news-card__image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
            transition: transform var(--transition-smooth);
        }

        .news-card:hover .news-card__image img {
            transform: scale(1.04);
        }

        .news-card__tag {
            position: absolute;
            top: 12px;
            left: 12px;
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            background: rgba(15, 17, 21, 0.85);
            border: 1px solid rgba(189, 255, 63, 0.35);
            border-radius: var(--radius-pill);
            color: var(--accent);
            font-size: 12px;
            font-weight: 600;
            backdrop-filter: blur(6px);
        }

        .news-card__body {
            padding: 20px 22px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .news-card__meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 10px;
        }

        .news-card__meta span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .news-card__title {
            font-size: 17px;
            font-weight: 700;
            line-height: 1.45;
            color: var(--text-primary);
            margin-bottom: 10px;
            transition: color var(--transition-fast);
        }

        .news-card__title a {
            color: inherit;
        }

        .news-card__title a:hover {
            color: var(--accent);
        }

        .news-card__excerpt {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card__link {
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition-fast), color var(--transition-fast);
        }

        .news-card__link:hover {
            color: #D8FF7A;
            gap: 10px;
        }

        /* Stats Summary */
        .stat-summary {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .stat-summary__card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 24px 26px;
            transition: border-color var(--transition-fast), transform var(--transition-fast);
        }

        .stat-summary__card:hover {
            border-color: var(--border-active);
            transform: translateY(-3px);
        }

        .stat-summary__value {
            font-family: var(--font-mono);
            font-size: 36px;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 6px;
            letter-spacing: -0.02em;
        }

        .stat-summary__label {
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 500;
        }

        .stat-summary__trend {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            margin-top: 8px;
            padding: 3px 10px;
            border-radius: var(--radius-pill);
            font-weight: 600;
        }

        .stat-summary__trend--up {
            color: var(--accent);
            background: var(--accent-soft);
        }

        .stat-summary__trend--down {
            color: var(--danger);
            background: rgba(255, 77, 90, 0.12);
        }

        /* Featured Slider */
        .featured-slider {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .featured-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
        }

        .featured-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-active);
            box-shadow: var(--shadow-card-hover);
        }

        .featured-card__image {
            aspect-ratio: 21/9;
            overflow: hidden;
            background: var(--bg-secondary);
        }

        .featured-card__image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
            transition: transform var(--transition-smooth);
        }

        .featured-card:hover .featured-card__image img {
            transform: scale(1.04);
        }

        .featured-card__body {
            padding: 18px 20px 20px;
        }

        .featured-card__badge {
            display: inline-block;
            padding: 3px 10px;
            background: var(--accent-soft);
            border: 1px solid rgba(189, 255, 63, 0.3);
            border-radius: var(--radius-pill);
            color: var(--accent);
            font-size: 11px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .featured-card__title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.4;
            margin-bottom: 6px;
        }

        .featured-card__date {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* FAQ */
        .faq-accordion {
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }

        .faq-item:hover {
            border-color: rgba(255, 255, 255, 0.16);
        }

        .faq-item__button {
            width: 100%;
            background: transparent;
            border: none;
            padding: 18px 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            color: var(--text-primary);
            font-size: 16px;
            font-weight: 600;
            text-align: left;
            transition: color var(--transition-fast);
        }

        .faq-item__button:hover {
            color: var(--accent);
        }

        .faq-item__icon {
            flex-shrink: 0;
            font-size: 14px;
            color: var(--text-muted);
            transition: transform var(--transition-fast), color var(--transition-fast);
        }

        .faq-item.is-open .faq-item__icon {
            transform: rotate(180deg);
            color: var(--accent);
        }

        .faq-item__content {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-smooth);
        }

        .faq-item__content-inner {
            padding: 0 22px 20px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* Subscribe Banner */
        .subscribe-banner {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 36px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            position: relative;
            overflow: hidden;
        }

        .subscribe-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent), rgba(189, 255, 63, 0.3), transparent);
        }

        .subscribe-banner__content h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .subscribe-banner__content p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0;
            max-width: 440px;
        }

        .subscribe-banner__form {
            display: flex;
            gap: 12px;
            align-items: center;
            flex-shrink: 0;
        }

        .subscribe-banner__input {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-pill);
            padding: 12px 20px;
            color: var(--text-primary);
            font-size: 14px;
            min-width: 280px;
            outline: none;
            box-shadow: none;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }

        .subscribe-banner__input:focus {
            border-color: var(--border-active);
            box-shadow: 0 0 0 4px var(--accent-soft);
        }

        .subscribe-banner__input::placeholder {
            color: var(--text-muted);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: #0B0D10;
            font-weight: 700;
            font-size: 14px;
            padding: 12px 24px;
            border-radius: var(--radius-pill);
            border: none;
            cursor: pointer;
            transition: background var(--transition-fast), transform var(--transition-fast);
            white-space: nowrap;
        }

        .btn-primary:hover {
            background: #D8FF7A;
            transform: translateY(-2px);
            color: #0B0D10;
        }

        /* Tag Cloud */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }

        .tag-cloud__item {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-pill);
            color: var(--text-secondary);
            font-size: 13px;
            transition: border-color var(--transition-fast), color var(--transition-fast), background var(--transition-fast);
        }

        .tag-cloud__item:hover {
            border-color: var(--border-active);
            color: var(--accent);
            background: var(--bg-card-hover);
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 56px 0 28px;
            margin-top: 32px;
        }

        .site-footer__grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .site-footer__brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-top: 14px;
            max-width: 340px;
        }

        .site-footer__col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
        }

        .site-footer__links {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .site-footer__links a {
            color: var(--text-muted);
            font-size: 14px;
            transition: color var(--transition-fast);
        }

        .site-footer__links a:hover {
            color: var(--accent);
        }

        .site-footer__bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            padding-top: 24px;
            border-top: 1px solid var(--border-subtle);
            font-size: 13px;
            color: var(--text-muted);
        }

        .site-footer__legal {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .site-footer__bottom a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .site-footer__bottom a:hover {
            color: var(--accent);
        }

        /* Scroll Reveal */
        .reveal-on-scroll {
            opacity: 0;
            transform: translateY(28px);
            transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        .reveal-on-scroll.is-visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .featured-slider {
                grid-template-columns: repeat(2, 1fr);
            }

            .stat-summary {
                grid-template-columns: repeat(2, 1fr);
            }

            .site-footer__grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .nav-search {
                max-width: 320px;
            }

            .nav-menu__link {
                padding: 8px 12px;
                font-size: 13px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --spacing-section: 56px;
                --header-height: 64px;
            }

            .site-header .container {
                flex-wrap: wrap;
                gap: 12px;
            }

            .nav-toggle {
                display: inline-flex;
                align-items: center;
                justify-content: center;
                margin-left: auto;
            }

            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                padding: 12px 0;
                border-top: 1px solid var(--border-subtle);
            }

            .nav-menu.is-open {
                display: flex;
            }

            .nav-menu__link {
                padding: 10px 16px;
                border-radius: var(--radius-sm);
                justify-content: flex-start;
            }

            .nav-search {
                max-width: 100%;
                order: 5;
                flex-basis: 100%;
            }

            .news-grid {
                grid-template-columns: 1fr;
            }

            .featured-slider {
                grid-template-columns: 1fr;
            }

            .stat-summary {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .stat-summary__value {
                font-size: 28px;
            }

            .site-footer__grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .subscribe-banner {
                flex-direction: column;
                align-items: flex-start;
                padding: 28px 24px;
            }

            .subscribe-banner__form {
                flex-direction: column;
                width: 100%;
                align-items: stretch;
            }

            .subscribe-banner__input {
                min-width: 0;
                width: 100%;
            }

            .btn-primary {
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            :root {
                --spacing-section: 44px;
                --header-height: 60px;
            }

            .category-hero__title {
                font-size: 28px;
            }

            .site-logo__text {
                font-size: 18px;
            }

            .site-logo__icon {
                width: 32px;
                height: 32px;
                font-size: 16px;
            }

            .stat-summary {
                grid-template-columns: 1fr;
            }

            .filter-bar .container {
                gap: 8px;
            }

            .filter-chip {
                padding: 6px 14px;
                font-size: 12px;
            }

            .site-footer__bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

/* roulang page: category4 */
:root {
            --bg-primary: #0F1115;
            --bg-secondary: #0B0D10;
            --bg-card: #14171D;
            --bg-card-hover: #181C23;
            --border-subtle: rgba(255, 255, 255, 0.08);
            --border-active: rgba(189, 255, 63, 0.45);
            --accent: #BDFF3F;
            --accent-soft: rgba(189, 255, 63, 0.12);
            --accent-glow: rgba(189, 255, 63, 0.25);
            --text-primary: #F5F7FA;
            --text-secondary: #B6BCC8;
            --text-muted: #7A8291;
            --danger: #FF4D5A;
            --info: #7C88FF;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-pill: 999px;
            --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 16px 40px rgba(0, 0, 0, 0.45);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Source Han Sans SC', 'Noto Sans CJK SC', sans-serif;
            --font-mono: 'Roboto Mono', 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --spacing-section: 72px;
            --spacing-section-mobile: 48px;
            --header-height: 76px;
            --container-max: 1280px;
        }

        @media (max-width: 1024px) {
            :root {
                --spacing-section: 56px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --spacing-section: 44px;
                --header-height: 64px;
            }
        }

        /* Base Reset & Global */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.75;
            overflow-x: hidden;
            min-height: 100vh;
            margin: 0;
        }
        img,
        svg {
            vertical-align: middle;
            max-width: 100%;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition-fast), opacity var(--transition-fast);
        }
        a:hover {
            color: #D8FF7A;
            opacity: 0.9;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        h1, h2, h3, h4, h5, h6 {
            margin-top: 0;
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-primary);
        }
        p {
            margin-top: 0;
        }
        ul, ol {
            margin-top: 0;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .section {
            padding: var(--spacing-section) 0;
        }
        .section--alt {
            background-color: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }
        .section--dark {
            background-color: var(--bg-primary);
        }
        .section__header {
            margin-bottom: 40px;
        }
        .section__eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent);
            background: var(--accent-soft);
            padding: 6px 16px;
            border-radius: var(--radius-pill);
            margin-bottom: 16px;
            border: 1px solid rgba(189, 255, 63, 0.2);
        }
        .section__eyebrow i {
            font-size: 11px;
        }
        .section__title {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.01em;
            color: var(--text-primary);
            margin-bottom: 0;
        }
        .section__desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.8;
            margin-top: 16px;
        }

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(15, 17, 21, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-subtle);
            min-height: var(--header-height);
            display: flex;
            align-items: center;
            transition: background var(--transition-fast);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            gap: 20px;
            width: 100%;
            flex-wrap: nowrap;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .site-logo__icon {
            width: 36px;
            height: 36px;
            background: var(--accent);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0B0D10;
            font-weight: 800;
            font-size: 18px;
            transform: skewX(-6deg);
            transition: transform var(--transition-fast);
        }
        .site-logo:hover .site-logo__icon {
            transform: skewX(-6deg) scale(1.05);
        }
        .site-logo__text {
            font-weight: 800;
            font-size: 20px;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            line-height: 1;
            white-space: nowrap;
        }
        .site-logo__text span {
            color: var(--accent);
        }
        .nav-search {
            flex: 1;
            max-width: 460px;
            margin: 0 auto;
            position: relative;
            min-width: 0;
        }
        .nav-search__input {
            width: 100%;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-pill);
            padding: 10px 20px 10px 44px;
            color: var(--text-primary);
            font-size: 14px;
            outline: none;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            height: 44px;
        }
        .nav-search__input::placeholder {
            color: var(--text-muted);
        }
        .nav-search__icon {
            position: absolute;
            left: 18px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 14px;
            pointer-events: none;
        }
        .nav-search__input:focus {
            border-color: var(--border-active);
            box-shadow: 0 0 0 3px var(--accent-soft);
            transform: scale(1.015);
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-shrink: 0;
            flex-wrap: wrap;
            justify-content: flex-end;
        }
        .nav-menu__link {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: color var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
        }
        .nav-menu__link:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.06);
            opacity: 1;
        }
        .nav-menu__link--active {
            color: var(--accent);
            background: var(--accent-soft);
            font-weight: 600;
        }
        .nav-menu__link--active:hover {
            color: var(--accent);
            background: var(--accent-soft);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            width: 44px;
            height: 44px;
            cursor: pointer;
            font-size: 18px;
            align-items: center;
            justify-content: center;
            transition: background var(--transition-fast);
            flex-shrink: 0;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 20px;
            padding-top: 28px;
        }
        .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--accent);
            opacity: 1;
        }
        .breadcrumb__sep {
            color: var(--text-muted);
            font-size: 12px;
        }
        .breadcrumb__current {
            color: var(--accent);
            font-weight: 500;
        }

        /* Category Hero */
        .category-hero {
            padding: 40px 0 32px;
            border-bottom: 1px solid var(--border-subtle);
            background: var(--bg-secondary);
        }
        .category-hero__title {
            font-size: clamp(32px, 5vw, 52px);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.2;
            color: var(--text-primary);
            margin-bottom: 14px;
        }
        .category-hero__desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.8;
        }

        /* Filter Bar */
        .filter-bar {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            padding: 20px 0;
            border-bottom: 1px solid var(--border-subtle);
            margin-bottom: 32px;
        }
        .filter-bar__label {
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 500;
            margin-right: 4px;
        }
        .filter-bar__chip {
            display: inline-flex;
            align-items: center;
            padding: 7px 16px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .filter-bar__chip:hover {
            border-color: var(--border-active);
            color: var(--accent);
        }
        .filter-bar__chip--active {
            background: var(--accent-soft);
            color: var(--accent);
            border-color: var(--border-active);
            font-weight: 600;
        }

        /* Tool Cards */
        .tool-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 24px;
            height: 100%;
            display: flex;
            flex-direction: column;
            gap: 12px;
            transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
        }
        .tool-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-active);
            box-shadow: var(--shadow-card-hover);
            background: var(--bg-card-hover);
        }
        .tool-card__icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: var(--accent-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 18px;
            flex-shrink: 0;
        }
        .tool-card__title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.4;
        }
        .tool-card__desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
        }
        .tool-card__meta {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            font-size: 12px;
            color: var(--text-muted);
        }
        .tool-card__tag {
            display: inline-block;
            padding: 3px 10px;
            border-radius: var(--radius-pill);
            font-size: 11px;
            font-weight: 500;
            background: var(--accent-soft);
            color: var(--accent);
            border: 1px solid rgba(189, 255, 63, 0.2);
        }
        .tool-card__link {
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition-fast);
        }
        .tool-card__link i {
            font-size: 11px;
        }
        .tool-card__link:hover {
            gap: 10px;
            color: #D8FF7A;
            opacity: 1;
        }

        /* Data Summary */
        .summary-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .summary-strip__item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 22px 20px;
            display: flex;
            flex-direction: column;
            gap: 6px;
            transition: border-color var(--transition-fast);
        }
        .summary-strip__item:hover {
            border-color: var(--border-active);
        }
        .summary-strip__value {
            font-family: var(--font-mono);
            font-size: 28px;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.2;
            letter-spacing: -0.02em;
        }
        .summary-strip__label {
            font-size: 13px;
            color: var(--text-secondary);
        }
        .summary-strip__trend {
            font-size: 12px;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .summary-strip__trend--up {
            color: var(--accent);
        }
        .summary-strip__trend--down {
            color: var(--danger);
        }

        /* Featured Cards */
        .featured-scroll {
            display: flex;
            gap: 16px;
            overflow-x: auto;
            padding-bottom: 8px;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
        }
        .featured-scroll::-webkit-scrollbar {
            height: 4px;
        }
        .featured-scroll::-webkit-scrollbar-track {
            background: var(--bg-secondary);
            border-radius: var(--radius-pill);
        }
        .featured-scroll::-webkit-scrollbar-thumb {
            background: var(--border-active);
            border-radius: var(--radius-pill);
        }
        .featured-card {
            flex: 0 0 300px;
            scroll-snap-align: start;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: transform var(--transition-fast), border-color var(--transition-fast);
        }
        .featured-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-active);
        }
        .featured-card__img {
            height: 150px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .featured-card__img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15,17,21,0) 40%, rgba(15,17,21,0.7) 100%);
        }
        .featured-card__body {
            padding: 18px 20px;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .featured-card__title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.4;
        }
        .featured-card__desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* FAQ */
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            overflow: hidden;
        }
        .faq-item__btn {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
            padding: 18px 20px;
            background: none;
            border: none;
            cursor: pointer;
            color: var(--text-primary);
            font-size: 15px;
            font-weight: 600;
            text-align: left;
            transition: background var(--transition-fast);
        }
        .faq-item__btn:hover {
            background: rgba(255, 255, 255, 0.04);
        }
        .faq-item__btn i {
            color: var(--text-muted);
            font-size: 13px;
            transition: transform var(--transition-fast);
        }
        .faq-item--open .faq-item__btn i {
            transform: rotate(180deg);
            color: var(--accent);
        }
        .faq-item__content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }
        .faq-item__content-inner {
            padding: 0 20px 18px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .faq-item--open .faq-item__content {
            max-height: 300px;
        }

        /* Subscribe Banner */
        .subscribe-banner {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 40px 36px;
            display: flex;
            align-items: center;
            gap: 24px;
            flex-wrap: wrap;
        }
        .subscribe-banner__icon {
            width: 56px;
            height: 56px;
            border-radius: 12px;
            background: var(--accent-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 24px;
            flex-shrink: 0;
        }
        .subscribe-banner__content {
            flex: 1;
            min-width: 200px;
        }
        .subscribe-banner__title {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .subscribe-banner__desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .subscribe-banner__form {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            min-width: 280px;
        }
        .subscribe-banner__input {
            flex: 1;
            min-width: 180px;
            background: var(--bg-primary);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-pill);
            padding: 10px 20px;
            color: var(--text-primary);
            font-size: 14px;
            outline: none;
            height: 44px;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }
        .subscribe-banner__input:focus {
            border-color: var(--border-active);
            box-shadow: 0 0 0 3px var(--accent-soft);
        }
        .subscribe-banner__btn {
            background: var(--accent);
            color: #0B0D10;
            border: none;
            border-radius: var(--radius-pill);
            padding: 10px 24px;
            font-size: 14px;
            font-weight: 700;
            cursor: pointer;
            transition: all var(--transition-fast);
            height: 44px;
            white-space: nowrap;
        }
        .subscribe-banner__btn:hover {
            background: #D8FF7A;
            transform: translateY(-2px);
        }

        /* Tag Cloud */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .tag-cloud__item {
            display: inline-block;
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 500;
            background: var(--bg-card);
            color: var(--text-secondary);
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-fast);
            cursor: pointer;
        }
        .tag-cloud__item:hover {
            border-color: var(--border-active);
            color: var(--accent);
            background: var(--accent-soft);
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 48px 0 24px;
            margin-top: 0;
        }
        .site-footer__grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .site-footer__brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 300px;
            margin-top: 16px;
        }
        .site-footer__col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
        }
        .site-footer__links {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .site-footer__links a {
            font-size: 13px;
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }
        .site-footer__links a:hover {
            color: var(--accent);
            opacity: 1;
        }
        .site-footer__bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            padding-top: 20px;
            border-top: 1px solid var(--border-subtle);
            font-size: 12px;
            color: var(--text-muted);
        }
        .site-footer__legal {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }
        .site-footer__bottom a {
            color: var(--text-secondary);
            font-size: 12px;
        }
        .site-footer__bottom a:hover {
            color: var(--accent);
            opacity: 1;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .site-header .container {
                flex-wrap: wrap;
                gap: 12px;
                padding-top: 8px;
                padding-bottom: 8px;
            }
            .nav-search {
                order: 3;
                max-width: 100%;
                flex-basis: 100%;
                margin: 4px 0;
            }
            .nav-menu {
                order: 2;
            }
            .site-logo {
                order: 1;
            }
            .nav-toggle {
                display: none;
            }
            .site-footer__grid {
                grid-template-columns: 1fr 1fr;
            }
            .summary-strip {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .site-header .container {
                flex-wrap: nowrap;
                gap: 10px;
                padding-top: 0;
                padding-bottom: 0;
            }
            .nav-search {
                order: initial;
                max-width: none;
                flex-basis: auto;
                flex: 1;
                min-width: 0;
                margin: 0;
            }
            .nav-search__input {
                height: 40px;
                padding: 8px 14px 8px 36px;
                font-size: 13px;
            }
            .nav-search__icon {
                left: 14px;
                font-size: 12px;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--bg-primary);
                border-bottom: 1px solid var(--border-subtle);
                padding: 16px;
                flex-direction: column;
                gap: 4px;
                align-items: stretch;
                box-shadow: var(--shadow-card);
            }
            .nav-menu--open {
                display: flex;
            }
            .nav-menu__link {
                display: flex;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
                font-size: 14px;
            }
            .nav-toggle {
                display: flex;
            }
            .site-logo__text {
                font-size: 18px;
            }
            .site-logo__icon {
                width: 32px;
                height: 32px;
                font-size: 16px;
            }
            .breadcrumb {
                padding-top: 16px;
                margin-bottom: 12px;
                font-size: 12px;
            }
            .category-hero {
                padding: 24px 0 20px;
            }
            .category-hero__title {
                font-size: clamp(26px, 7vw, 34px);
            }
            .filter-bar {
                gap: 6px;
                padding: 14px 0;
            }
            .filter-bar__chip {
                padding: 6px 12px;
                font-size: 12px;
            }
            .tool-card {
                padding: 18px;
            }
            .summary-strip {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .summary-strip__value {
                font-size: 22px;
            }
            .featured-card {
                flex: 0 0 260px;
            }
            .subscribe-banner {
                padding: 28px 20px;
                flex-direction: column;
                align-items: flex-start;
            }
            .subscribe-banner__form {
                min-width: 100%;
                flex-direction: column;
            }
            .subscribe-banner__input {
                min-width: 100%;
            }
            .subscribe-banner__btn {
                width: 100%;
            }
            .site-footer {
                padding: 32px 0 20px;
            }
            .site-footer__grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .site-footer__bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .site-footer__legal {
                flex-direction: column;
                gap: 6px;
            }
            .section__title {
                font-size: clamp(24px, 6vw, 30px);
            }
        }

        @media (max-width: 520px) {
            .summary-strip {
                grid-template-columns: 1fr;
            }
            .featured-card {
                flex: 0 0 220px;
            }
            .featured-card__img {
                height: 120px;
            }
            .filter-bar__label {
                display: block;
                width: 100%;
                margin-bottom: 2px;
            }
        }

        /* Reveal animation */
        .reveal {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .reveal--visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* Utility */
        .grid-margin-x > .cell {
            margin-bottom: 16px;
        }
        .mt-0 { margin-top: 0; }
        .mb-0 { margin-bottom: 0; }
        .text-muted { color: var(--text-muted); }