/* roulang page: index */
:root {
            --color-primary: #3B82F6;
            --color-primary-hover: #2563EB;
            --color-primary-light: #EFF6FF;
            --color-primary-bg: #EBF4FF;
            --color-accent: #F59E0B;
            --color-accent-hover: #D97706;
            --color-bg: #FFFFFF;
            --color-bg-alt: #F8FAFC;
            --color-text: #1E293B;
            --color-text-secondary: #64748B;
            --color-text-light: #94A3B8;
            --color-border: #E2E8F0;
            --color-border-light: #F1F5F9;
            --color-dark: #1E293B;
            --color-white: #FFFFFF;
            --color-success: #10B981;
            --color-star: #F59E0B;
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --radius-xl: 16px;
            --radius-pill: 30px;
            --radius-full: 9999px;
            --shadow-card: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
            --shadow-card-hover: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
            --shadow-nav: 0 1px 3px rgba(0,0,0,0.08);
            --shadow-btn: 0 2px 4px rgba(59,130,246,0.25);
            --shadow-lg: 0 20px 40px rgba(0,0,0,0.12);
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --font-size-xs: 0.75rem;
            --font-size-sm: 0.875rem;
            --font-size-base: 1rem;
            --font-size-md: 1.125rem;
            --font-size-lg: 1.25rem;
            --font-size-xl: 1.5rem;
            --font-size-2xl: 1.875rem;
            --font-size-3xl: 2.5rem;
            --font-size-hero: 3rem;
            --line-height-tight: 1.2;
            --line-height-normal: 1.6;
            --line-height-relaxed: 1.75;
            --spacing-xs: 4px;
            --spacing-sm: 8px;
            --spacing-md: 16px;
            --spacing-lg: 24px;
            --spacing-xl: 32px;
            --spacing-2xl: 40px;
            --spacing-3xl: 60px;
            --spacing-4xl: 80px;
            --transition-fast: 0.15s ease;
            --transition-normal: 0.2s ease;
            --transition-slow: 0.3s ease;
            --container-max: 1200px;
            --container-narrow: 960px;
            --nav-height: 64px;
            --topbar-height: 40px;
        }

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

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

        body {
            font-family: var(--font-family);
            font-size: var(--font-size-base);
            line-height: var(--line-height-normal);
            color: var(--color-text);
            background-color: var(--color-bg);
            min-width: 320px;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button, input, textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        ul, ol {
            list-style: none;
        }

        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            line-height: var(--line-height-tight);
            letter-spacing: -0.02em;
            color: var(--color-text);
        }

        h1 { font-size: var(--font-size-3xl); }
        h2 { font-size: var(--font-size-2xl); }
        h3 { font-size: var(--font-size-xl); }

        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--spacing-2xl);
        }

        .container-narrow {
            max-width: var(--container-narrow);
        }

        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0,0,0,0);
            white-space: nowrap;
            border: 0;
        }

        /* ========== TOP BAR ========== */
        .topbar {
            background-color: var(--color-dark);
            height: var(--topbar-height);
            color: var(--color-white);
            font-size: var(--font-size-sm);
            display: flex;
            align-items: center;
            z-index: 1001;
            position: relative;
        }
        .topbar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .topbar__domain {
            color: var(--color-white);
            opacity: 0.85;
            letter-spacing: 0.02em;
        }
        .topbar__links {
            display: flex;
            align-items: center;
            gap: var(--spacing-lg);
        }
        .topbar__links a {
            color: #93C5FD;
            transition: color var(--transition-fast), text-decoration var(--transition-fast);
            font-size: var(--font-size-sm);
        }
        .topbar__links a:hover {
            color: #BFDBFE;
            text-decoration: underline;
        }
        .topbar__sep {
            color: rgba(255,255,255,0.3);
            font-size: var(--font-size-xs);
        }

        /* ========== MAIN NAV ========== */
        .main-nav {
            background-color: var(--color-white);
            height: var(--nav-height);
            box-shadow: var(--shadow-nav);
            position: sticky;
            top: 0;
            z-index: 1000;
            display: flex;
            align-items: center;
        }
        .main-nav .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .nav__logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: -0.01em;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .nav__logo:hover {
            color: var(--color-primary-hover);
        }
        .nav__menu {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
        }
        .nav__menu a {
            color: #475569;
            font-size: var(--font-size-sm);
            font-weight: 500;
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            position: relative;
            transition: color var(--transition-fast);
            white-space: nowrap;
        }
        .nav__menu a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 14px;
            right: 14px;
            height: 2px;
            background-color: var(--color-primary);
            transform: scaleX(0);
            transition: transform var(--transition-normal);
            border-radius: 1px;
        }
        .nav__menu a:hover {
            color: var(--color-primary);
        }
        .nav__menu a:hover::after {
            transform: scaleX(1);
        }
        .nav__menu a.active {
            color: var(--color-primary);
        }
        .nav__menu a.active::after {
            transform: scaleX(1);
        }
        .nav__search {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            margin-left: var(--spacing-md);
        }
        .nav__search-input {
            border: 1px solid var(--color-border);
            border-radius: var(--radius-pill);
            padding: 8px 16px;
            font-size: var(--font-size-sm);
            width: 180px;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
            background: var(--color-bg-alt);
        }
        .nav__search-input:focus {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(59,130,246,0.2);
            background: var(--color-white);
        }
        .nav__search-btn {
            background: var(--color-primary);
            color: var(--color-white);
            border-radius: var(--radius-pill);
            padding: 8px 16px;
            font-size: var(--font-size-sm);
            font-weight: 600;
            transition: background var(--transition-fast);
            white-space: nowrap;
        }
        .nav__search-btn:hover {
            background: var(--color-primary-hover);
        }
        .nav__hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 8px;
            z-index: 1002;
        }
        .nav__hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--color-text);
            border-radius: 2px;
            transition: var(--transition-normal);
        }
        .nav__hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav__hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .nav__hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ========== HERO ========== */
        .hero {
            position: relative;
            min-height: 65vh;
            display: flex;
            align-items: center;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            overflow: hidden;
            padding: var(--spacing-4xl) 0;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(0,0,0,0.5) 0%, rgba(0,0,0,0.35) 40%, rgba(0,0,0,0.08) 100%);
            z-index: 1;
        }
        .hero__content {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-3xl);
            align-items: center;
        }
        .hero__left {
            color: var(--color-white);
        }
        .hero__title {
            font-size: var(--font-size-hero);
            color: var(--color-white);
            text-shadow: 0 2px 8px rgba(0,0,0,0.35);
            margin-bottom: var(--spacing-md);
            line-height: 1.15;
        }
        .hero__subtitle {
            font-size: var(--font-size-lg);
            color: rgba(255,255,255,0.88);
            line-height: var(--line-height-relaxed);
            margin-bottom: var(--spacing-lg);
            max-width: 520px;
        }
        .hero__stats {
            display: flex;
            gap: var(--spacing-2xl);
            margin-bottom: var(--spacing-xl);
            flex-wrap: wrap;
        }
        .hero__stat {
            text-align: center;
        }
        .hero__stat-number {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-white);
            display: block;
            line-height: 1;
        }
        .hero__stat-label {
            font-size: var(--font-size-sm);
            color: rgba(255,255,255,0.75);
            margin-top: 4px;
        }
        .hero__cta-group {
            display: flex;
            gap: var(--spacing-md);
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            font-size: var(--font-size-base);
            transition: all var(--transition-normal);
            white-space: nowrap;
            letter-spacing: 0.01em;
        }
        .btn-primary {
            background: var(--color-primary);
            color: var(--color-white);
            border-radius: var(--radius-pill);
            box-shadow: var(--shadow-btn);
            padding: 14px 28px;
            font-size: var(--font-size-md);
        }
        .btn-primary:hover {
            background: var(--color-primary-hover);
            transform: scale(1.04);
            box-shadow: 0 6px 20px rgba(37,99,235,0.35);
        }
        .btn-primary:active {
            transform: scale(0.98);
        }
        .btn-outline {
            background: transparent;
            color: var(--color-white);
            border: 2px solid rgba(255,255,255,0.7);
            border-radius: var(--radius-pill);
            padding: 14px 28px;
            font-size: var(--font-size-md);
        }
        .btn-outline:hover {
            background: rgba(255,255,255,0.12);
            border-color: var(--color-white);
        }
        .btn-arrow::after {
            content: '→';
            font-size: 1.1em;
            transition: transform var(--transition-fast);
        }
        .btn-arrow:hover::after {
            transform: translateX(3px);
        }
        .hero__right {
            display: flex;
            justify-content: center;
        }
        .hero__form-card {
            background: var(--color-white);
            border-radius: var(--radius-xl);
            padding: var(--spacing-xl);
            box-shadow: var(--shadow-lg);
            width: 100%;
            max-width: 420px;
        }
        .hero__form-cover {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: var(--radius-md);
            margin-bottom: var(--spacing-lg);
            box-shadow: var(--shadow-card);
        }
        .hero__form-title {
            font-size: var(--font-size-lg);
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: var(--spacing-sm);
        }
        .hero__form-desc {
            font-size: var(--font-size-sm);
            color: var(--color-text-secondary);
            margin-bottom: var(--spacing-md);
            line-height: 1.5;
        }
        .hero__toc {
            margin-bottom: var(--spacing-lg);
            padding: var(--spacing-md);
            background: var(--color-bg-alt);
            border-radius: var(--radius-md);
        }
        .hero__toc-label {
            font-size: var(--font-size-xs);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--color-text-secondary);
            margin-bottom: var(--spacing-sm);
            font-weight: 600;
        }
        .hero__toc-list {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .hero__toc-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: var(--font-size-sm);
            color: var(--color-text);
        }
        .hero__toc-num {
            width: 22px;
            height: 22px;
            background: var(--color-primary);
            color: var(--color-white);
            border-radius: var(--radius-full);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: var(--font-size-xs);
            font-weight: 700;
            flex-shrink: 0;
        }
        .hero__form-row {
            display: flex;
            gap: var(--spacing-sm);
        }
        .hero__form-input {
            flex: 1;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            padding: 12px 16px;
            font-size: var(--font-size-base);
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
            background: var(--color-bg-alt);
        }
        .hero__form-input:focus {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(59,130,246,0.25);
            background: var(--color-white);
        }
        .hero__form-btn {
            background: var(--color-primary);
            color: var(--color-white);
            border-radius: var(--radius-sm);
            padding: 12px 20px;
            font-weight: 600;
            font-size: var(--font-size-base);
            transition: all var(--transition-normal);
            white-space: nowrap;
            flex-shrink: 0;
        }
        .hero__form-btn:hover {
            background: var(--color-primary-hover);
            box-shadow: var(--shadow-btn);
        }
        .hero__form-note {
            font-size: var(--font-size-xs);
            color: var(--color-text-light);
            margin-top: var(--spacing-sm);
            text-align: center;
        }

        /* ========== SECTIONS ========== */
        .section {
            padding: var(--spacing-4xl) 0;
        }
        .section--alt {
            background-color: var(--color-bg-alt);
        }
        .section__header {
            text-align: center;
            margin-bottom: var(--spacing-3xl);
        }
        .section__title {
            font-size: var(--font-size-2xl);
            color: var(--color-text);
            margin-bottom: var(--spacing-sm);
        }
        .section__desc {
            font-size: var(--font-size-md);
            color: var(--color-text-secondary);
            max-width: 640px;
            margin: 0 auto;
            line-height: var(--line-height-relaxed);
        }
        .section__badge {
            display: inline-block;
            background: var(--color-primary-bg);
            color: var(--color-primary);
            font-size: var(--font-size-sm);
            font-weight: 600;
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            margin-bottom: var(--spacing-md);
            letter-spacing: 0.02em;
        }

        /* ========== COLLECTION GRID ========== */
        .collection-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-lg);
        }
        .collection-grid__item {
            background: var(--color-white);
            border-radius: var(--radius-md);
            padding: var(--spacing-xl);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-normal);
            cursor: pointer;
            display: flex;
            gap: var(--spacing-lg);
            align-items: flex-start;
            border: 1px solid transparent;
        }
        .collection-grid__item:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: var(--color-border);
        }
        .collection-grid__item--featured {
            grid-row: span 2;
            flex-direction: column;
        }
        .collection-grid__icon {
            width: 64px;
            height: 64px;
            border-radius: var(--radius-full);
            background: var(--color-primary-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: background var(--transition-normal);
            overflow: hidden;
        }
        .collection-grid__item:hover .collection-grid__icon {
            background: #FEF3C7;
        }
        .collection-grid__icon img {
            width: 40px;
            height: 40px;
            object-fit: cover;
            border-radius: 50%;
        }
        .collection-grid__icon--large {
            width: 80px;
            height: 80px;
        }
        .collection-grid__icon--large img {
            width: 52px;
            height: 52px;
        }
        .collection-grid__info h3 {
            font-size: var(--font-size-xl);
            margin-bottom: 6px;
        }
        .collection-grid__info p {
            font-size: var(--font-size-sm);
            color: var(--color-text-secondary);
            line-height: 1.5;
            margin-bottom: var(--spacing-sm);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .collection-grid__link {
            color: var(--color-primary);
            font-weight: 600;
            font-size: var(--font-size-sm);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap var(--transition-fast);
        }
        .collection-grid__link:hover {
            gap: 8px;
        }
        .collection-grid__link::after {
            content: '→';
        }

        /* ========== RECOMMEND CARDS ========== */
        .recommend-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-lg);
        }
        .recommend-card {
            background: var(--color-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-normal);
            border: 1px solid transparent;
        }
        .recommend-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            border-color: var(--color-border);
        }
        .recommend-card__img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }
        .recommend-card__body {
            padding: var(--spacing-lg);
        }
        .recommend-card__tag {
            display: inline-block;
            background: #FEF3C7;
            color: var(--color-accent);
            font-size: var(--font-size-xs);
            font-weight: 600;
            padding: 3px 10px;
            border-radius: var(--radius-pill);
            margin-bottom: var(--spacing-sm);
        }
        .recommend-card__title {
            font-size: var(--font-size-md);
            font-weight: 700;
            margin-bottom: 6px;
            line-height: 1.4;
        }
        .recommend-card__desc {
            font-size: var(--font-size-sm);
            color: var(--color-text-secondary);
            line-height: 1.5;
        }
        .recommend-card__meta {
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
            margin-top: var(--spacing-sm);
            font-size: var(--font-size-xs);
            color: var(--color-text-light);
        }
        .recommend-card__stars {
            color: var(--color-star);
            letter-spacing: 1px;
        }

        /* ========== NEWS LAYOUT ========== */
        .news-layout {
            display: grid;
            grid-template-columns: 1fr 340px;
            gap: var(--spacing-2xl);
        }
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }
        .news-list__item {
            padding: var(--spacing-lg) 0;
            border-bottom: 1px solid var(--color-border-light);
            transition: background var(--transition-fast);
            cursor: pointer;
        }
        .news-list__item:hover {
            background: #FAFBFC;
            padding-left: var(--spacing-sm);
            margin-left: calc(-1 * var(--spacing-sm));
            border-radius: var(--radius-sm);
        }
        .news-list__item:first-child {
            padding-top: 0;
        }
        .news-list__title {
            font-size: var(--font-size-md);
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 4px;
            line-height: 1.4;
            transition: color var(--transition-fast);
        }
        .news-list__item:hover .news-list__title {
            color: var(--color-primary);
        }
        .news-list__excerpt {
            font-size: var(--font-size-sm);
            color: var(--color-text-secondary);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 6px;
        }
        .news-list__meta {
            font-size: var(--font-size-xs);
            color: var(--color-text-light);
            display: flex;
            gap: var(--spacing-md);
        }
        .news-sidebar {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-lg);
        }
        .news-sidebar__card {
            background: var(--color-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-normal);
            cursor: pointer;
        }
        .news-sidebar__card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .news-sidebar__img {
            width: 100%;
            height: 160px;
            object-fit: cover;
        }
        .news-sidebar__body {
            padding: var(--spacing-md);
        }
        .news-sidebar__title {
            font-size: var(--font-size-sm);
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 4px;
        }
        .news-sidebar__meta {
            font-size: var(--font-size-xs);
            color: var(--color-text-light);
        }

        /* ========== RANKING TABLE ========== */
        .ranking-table-wrap {
            background: var(--color-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            overflow: hidden;
        }
        .ranking-table {
            width: 100%;
            border-collapse: collapse;
        }
        .ranking-table th {
            background: var(--color-bg-alt);
            padding: 14px var(--spacing-lg);
            text-align: left;
            font-size: var(--font-size-sm);
            font-weight: 600;
            color: var(--color-text-secondary);
            border-bottom: 2px solid var(--color-border);
            letter-spacing: 0.02em;
        }
        .ranking-table td {
            padding: 14px var(--spacing-lg);
            font-size: var(--font-size-sm);
            border-bottom: 1px solid var(--color-border-light);
            transition: background var(--transition-fast);
        }
        .ranking-table tbody tr:hover td {
            background: #FAFBFC;
        }
        .ranking-table tbody tr:last-child td {
            border-bottom: none;
        }
        .ranking-table .rank-num {
            font-weight: 700;
            font-size: var(--font-size-md);
            color: var(--color-text);
            width: 50px;
        }
        .ranking-table .rank-num--top {
            color: var(--color-accent);
        }
        .ranking-table .rank-title {
            font-weight: 600;
            color: var(--color-text);
        }
        .ranking-table .rank-title:hover {
            color: var(--color-primary);
        }
        .ranking-table .rank-hot {
            color: #EF4444;
            font-weight: 600;
            font-size: var(--font-size-xs);
        }
        .ranking-table .rank-trend {
            font-weight: 600;
            font-size: var(--font-size-xs);
        }
        .ranking-table .rank-trend--up {
            color: var(--color-success);
        }
        .ranking-table .rank-trend--down {
            color: #EF4444;
        }

        /* ========== VERTICAL CARDS ========== */
        .vertical-cards {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-lg);
        }
        .vertical-card {
            background: var(--color-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-normal);
            cursor: pointer;
            display: flex;
            flex-direction: column;
            border: 1px solid transparent;
        }
        .vertical-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            border-color: var(--color-border);
        }
        .vertical-card__img-wrap {
            position: relative;
            aspect-ratio: 3/4;
            overflow: hidden;
        }
        .vertical-card__img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .vertical-card:hover .vertical-card__img {
            transform: scale(1.05);
        }
        .vertical-card__badge {
            position: absolute;
            top: 10px;
            left: 10px;
            background: var(--color-accent);
            color: var(--color-white);
            font-size: var(--font-size-xs);
            font-weight: 700;
            padding: 4px 10px;
            border-radius: var(--radius-pill);
            z-index: 2;
        }
        .vertical-card__body {
            padding: var(--spacing-md);
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .vertical-card__title {
            font-size: var(--font-size-sm);
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: var(--spacing-sm);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .vertical-card__btn {
            display: inline-block;
            width: 100%;
            text-align: center;
            padding: 8px 0;
            background: var(--color-primary);
            color: var(--color-white);
            border-radius: var(--radius-sm);
            font-size: var(--font-size-sm);
            font-weight: 600;
            transition: background var(--transition-fast);
            margin-top: auto;
        }
        .vertical-card__btn:hover {
            background: var(--color-primary-hover);
        }

        /* ========== SHARE COLLECT ========== */
        .share-collect {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-2xl);
            align-items: center;
        }
        .share-collect__visual {
            background: var(--color-bg-alt);
            border-radius: var(--radius-xl);
            padding: var(--spacing-3xl);
            text-align: center;
            min-height: 300px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }
        .share-collect__visual img {
            width: 200px;
            height: 200px;
            object-fit: cover;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            margin-bottom: var(--spacing-lg);
        }
        .share-collect__info h3 {
            margin-bottom: var(--spacing-sm);
        }
        .share-collect__info p {
            color: var(--color-text-secondary);
            font-size: var(--font-size-sm);
            line-height: 1.6;
            margin-bottom: var(--spacing-lg);
        }
        .share-buttons {
            display: flex;
            gap: var(--spacing-md);
            flex-wrap: wrap;
        }
        .share-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 18px;
            border-radius: var(--radius-pill);
            font-size: var(--font-size-sm);
            font-weight: 600;
            transition: all var(--transition-normal);
            border: 1px solid var(--color-border);
            background: var(--color-white);
            color: var(--color-text);
        }
        .share-btn:hover {
            background: var(--color-primary);
            color: var(--color-white);
            border-color: var(--color-primary);
            box-shadow: var(--shadow-btn);
        }
        .share-btn--wechat:hover {
            background: #07C160;
            border-color: #07C160;
        }
        .share-btn--weibo:hover {
            background: #E6162D;
            border-color: #E6162D;
        }
        .collect-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-pill);
            font-size: var(--font-size-base);
            font-weight: 600;
            background: var(--color-accent);
            color: var(--color-white);
            transition: all var(--transition-normal);
            box-shadow: 0 2px 8px rgba(245,158,11,0.3);
        }
        .collect-btn:hover {
            background: var(--color-accent-hover);
            transform: scale(1.03);
        }
        .collect-btn--collected {
            background: var(--color-success);
            box-shadow: 0 2px 8px rgba(16,185,129,0.3);
        }

        /* ========== GUIDE ========== */
        .guide-steps {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-xl);
        }
        .guide-step {
            text-align: center;
            padding: var(--spacing-xl);
            background: var(--color-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-normal);
            border: 1px solid transparent;
            position: relative;
        }
        .guide-step:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: var(--color-border);
        }
        .guide-step__num {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-full);
            background: var(--color-primary);
            color: var(--color-white);
            font-size: var(--font-size-lg);
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto var(--spacing-md);
        }
        .guide-step h4 {
            font-size: var(--font-size-md);
            margin-bottom: var(--spacing-sm);
        }
        .guide-step p {
            font-size: var(--font-size-sm);
            color: var(--color-text-secondary);
            line-height: 1.6;
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .faq-item {
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--color-border-light);
            background: var(--color-white);
        }
        .faq-item__header {
            background: var(--color-bg-alt);
            padding: var(--spacing-lg);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            transition: background var(--transition-fast);
            user-select: none;
            gap: var(--spacing-md);
        }
        .faq-item__header:hover {
            background: #EEF2F7;
        }
        .faq-item__header h3 {
            font-size: var(--font-size-md);
            font-weight: 600;
            flex: 1;
        }
        .faq-item__icon {
            width: 28px;
            height: 28px;
            border-radius: var(--radius-full);
            background: var(--color-border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--color-text-secondary);
            transition: all var(--transition-slow);
            flex-shrink: 0;
        }
        .faq-item.active .faq-item__icon {
            transform: rotate(45deg);
            background: var(--color-primary);
            color: var(--color-white);
        }
        .faq-item__body {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
            background: var(--color-white);
        }
        .faq-item.active .faq-item__body {
            max-height: 300px;
        }
        .faq-item__body-inner {
            padding: 0 var(--spacing-lg) var(--spacing-lg);
            font-size: var(--font-size-sm);
            color: var(--color-text-secondary);
            line-height: 1.7;
            border-left: 3px solid var(--color-primary);
            margin-left: var(--spacing-lg);
        }

        /* ========== CTA ========== */
        .cta-section {
            background: linear-gradient(135deg, var(--color-primary) 0%, #1D4ED8 100%);
            color: var(--color-white);
            text-align: center;
            padding: var(--spacing-4xl) 0;
        }
        .cta-section h2 {
            color: var(--color-white);
            font-size: var(--font-size-2xl);
            margin-bottom: var(--spacing-md);
        }
        .cta-section p {
            color: rgba(255,255,255,0.85);
            font-size: var(--font-size-md);
            max-width: 600px;
            margin: 0 auto var(--spacing-xl);
            line-height: 1.6;
        }
        .cta-section .btn {
            background: var(--color-white);
            color: var(--color-primary);
            font-size: var(--font-size-md);
            padding: 14px 32px;
            border-radius: var(--radius-pill);
            font-weight: 700;
            box-shadow: 0 4px 16px rgba(0,0,0,0.2);
        }
        .cta-section .btn:hover {
            background: #F0F5FF;
            transform: scale(1.05);
            box-shadow: 0 8px 24px rgba(0,0,0,0.25);
        }

        /* ========== FOOTER ========== */
        .footer {
            background: var(--color-dark);
            color: #CBD5E1;
            padding: var(--spacing-4xl) 0 var(--spacing-xl);
        }
        .footer__grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-2xl);
            margin-bottom: var(--spacing-3xl);
        }
        .footer__col h4 {
            color: var(--color-white);
            font-size: var(--font-size-md);
            margin-bottom: var(--spacing-lg);
            font-weight: 600;
        }
        .footer__col ul {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .footer__col ul li a {
            color: #CBD5E1;
            font-size: var(--font-size-sm);
            transition: color var(--transition-fast);
        }
        .footer__col ul li a:hover {
            color: var(--color-white);
        }
        .footer__bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: var(--spacing-xl);
            text-align: center;
            font-size: var(--font-size-sm);
            color: #94A3B8;
        }
        .footer__bottom a {
            color: #93C5FD;
            transition: color var(--transition-fast);
        }
        .footer__bottom a:hover {
            color: var(--color-white);
        }
        .footer__social {
            display: flex;
            gap: var(--spacing-sm);
            margin-top: var(--spacing-md);
        }
        .footer__social a {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-full);
            background: rgba(255,255,255,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-normal);
            font-size: var(--font-size-sm);
            color: #CBD5E1;
        }
        .footer__social a:hover {
            background: var(--color-primary);
            color: var(--color-white);
        }

        /* ========== MOBILE NAV OVERLAY ========== */
        .nav__mobile-menu {
            display: none;
            position: fixed;
            top: calc(var(--topbar-height) + var(--nav-height));
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--color-white);
            z-index: 999;
            flex-direction: column;
            padding: var(--spacing-xl);
            gap: var(--spacing-sm);
            overflow-y: auto;
        }
        .nav__mobile-menu.active {
            display: flex;
        }
        .nav__mobile-menu a {
            display: block;
            padding: 14px var(--spacing-md);
            font-size: var(--font-size-md);
            font-weight: 500;
            color: var(--color-text);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
        }
        .nav__mobile-menu a:hover {
            background: var(--color-primary-bg);
            color: var(--color-primary);
        }
        .nav__mobile-menu .nav__search-mobile {
            display: flex;
            gap: var(--spacing-sm);
            margin-top: var(--spacing-md);
        }
        .nav__mobile-menu .nav__search-mobile input {
            flex: 1;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            padding: 10px 14px;
            font-size: var(--font-size-base);
        }
        .nav__mobile-menu .nav__search-mobile button {
            background: var(--color-primary);
            color: var(--color-white);
            border-radius: var(--radius-sm);
            padding: 10px 18px;
            font-weight: 600;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1280px) {
            .container {
                padding: 0 var(--spacing-xl);
            }
            .vertical-cards {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        @media (max-width: 1024px) {
            :root {
                --font-size-hero: 2.2rem;
                --font-size-3xl: 2rem;
                --font-size-2xl: 1.6rem;
                --font-size-xl: 1.3rem;
                --spacing-4xl: 60px;
            }
            .hero__content {
                grid-template-columns: 1fr;
                gap: var(--spacing-2xl);
            }
            .hero__right {
                justify-content: flex-start;
            }
            .hero__form-card {
                max-width: 100%;
            }
            .collection-grid {
                grid-template-columns: 1fr 1fr;
            }
            .collection-grid__item--featured {
                grid-row: span 1;
            }
            .recommend-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-layout {
                grid-template-columns: 1fr;
            }
            .news-sidebar {
                flex-direction: row;
                flex-wrap: wrap;
            }
            .news-sidebar__card {
                flex: 1;
                min-width: 240px;
            }
            .vertical-cards {
                grid-template-columns: repeat(2, 1fr);
            }
            .share-collect {
                grid-template-columns: 1fr;
            }
            .guide-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer__grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .nav__search {
                display: none;
            }
            .nav__hamburger {
                display: flex;
            }
            .nav__menu {
                display: none;
            }
        }

        @media (max-width: 768px) {
            :root {
                --font-size-hero: 1.8rem;
                --font-size-3xl: 1.6rem;
                --font-size-2xl: 1.4rem;
                --font-size-xl: 1.2rem;
                --spacing-4xl: 48px;
                --spacing-3xl: 40px;
            }
            .container {
                padding: 0 var(--spacing-md);
            }
            .section {
                padding: var(--spacing-3xl) 0;
            }
            .hero {
                min-height: auto;
                padding: var(--spacing-3xl) 0;
            }
            .hero__content {
                grid-template-columns: 1fr;
            }
            .hero__stats {
                gap: var(--spacing-lg);
            }
            .hero__stat-number {
                font-size: 1.5rem;
            }
            .collection-grid {
                grid-template-columns: 1fr;
            }
            .recommend-grid {
                grid-template-columns: 1fr;
            }
            .vertical-cards {
                grid-template-columns: repeat(2, 1fr);
            }
            .guide-steps {
                grid-template-columns: 1fr;
            }
            .footer__grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-xl);
            }
            .share-collect {
                grid-template-columns: 1fr;
            }
            .ranking-table th,
            .ranking-table td {
                padding: 10px var(--spacing-sm);
                font-size: var(--font-size-xs);
            }
            .btn {
                padding: 10px 18px;
                font-size: var(--font-size-sm);
            }
            .btn-primary {
                padding: 12px 22px;
            }
            .hero__cta-group {
                flex-direction: column;
                gap: var(--spacing-sm);
            }
            .hero__form-row {
                flex-direction: column;
            }
            .news-sidebar {
                flex-direction: column;
            }
            .news-sidebar__card {
                min-width: auto;
            }
        }

        @media (max-width: 520px) {
            :root {
                --font-size-hero: 1.5rem;
                --font-size-3xl: 1.4rem;
                --font-size-2xl: 1.25rem;
                --font-size-xl: 1.1rem;
                --spacing-4xl: 36px;
                --spacing-3xl: 28px;
            }
            .topbar {
                font-size: var(--font-size-xs);
            }
            .topbar__links {
                gap: var(--spacing-sm);
            }
            .nav__logo {
                font-size: 1.2rem;
            }
            .hero__form-card {
                padding: var(--spacing-lg);
            }
            .hero__form-cover {
                height: 140px;
            }
            .vertical-cards {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-md);
            }
            .vertical-card__body {
                padding: var(--spacing-sm);
            }
            .footer__grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-lg);
            }
            .collection-grid__item {
                flex-direction: column;
                gap: var(--spacing-md);
            }
            .recommend-card__img {
                height: 160px;
            }
        }