:root {
            --main: #22d3ee;
            --accent: #fb923c;
            --bg: #0f172a;
            --text: #e2e8f0;
            --border-glow: rgba(34, 211, 238, 0.25);
            --surface-dark: #1e293b;
            --muted: #94a3b8;
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body {
            background-color: var(--bg);
            color: var(--text);
            font-family: 'Inter', sans-serif;
            line-height: 1.6;
            overflow-x: hidden;
        }
        a { color: inherit; text-decoration: none; }

        /* 几何浮动装饰 */
        .deco-shapes {
            position: fixed;
            top: 0; left: 0;
            width: 100%; height: 100%;
            pointer-events: none;
            z-index: 0;
            overflow: hidden;
        }
        .deco-shapes span {
            position: absolute;
            display: block;
            opacity: 0.12;
            border: 2px solid var(--main);
        }
        .shape1 { width: 220px; height: 220px; background: transparent; border-radius: 50%; top: 15%; left: -80px; }
        .shape2 { width: 100px; height: 100px; background: var(--accent); border-radius: 4px; bottom: 10%; right: 5%; transform: rotate(25deg); opacity: 0.07; }
        .shape3 { width: 300px; height: 300px; border-radius: 50%; border: 2px dashed var(--main); bottom: -120px; left: 20%; }
        .shape4 { width: 60px; height: 60px; background: var(--main); top: 8%; right: 12%; clip-path: polygon(50% 0%, 0% 100%, 100% 100%); opacity: 0.06; }

        .navbar-brand, .footer-brand {
            font-weight: 800;
            letter-spacing: -0.02em;
            font-size: 1.5rem;
        }
        .navbar-brand i, .footer-brand i {
            color: var(--accent);
            margin-right: 0.4rem;
        }

        /* 导航栏极简描边风格 */
        .custom-nav {
            border-bottom: 1px solid rgba(148, 163, 184, 0.2);
            background: rgba(15, 23, 42, 0.75);
            backdrop-filter: blur(8px);
            z-index: 100;
            padding: 0.8rem 0;
        }
        .custom-nav .nav-link {
            color: var(--text);
            font-weight: 500;
            margin: 0 0.6rem;
            font-size: 0.95rem;
            transition: 0.2s;
            border-bottom: 2px solid transparent;
        }
        .custom-nav .nav-link:hover {
            color: var(--main);
            border-bottom-color: var(--main);
        }
        .navbar-toggler {
            border: 1px solid var(--muted);
            color: var(--text);
        }

        /* 超大标题+渐变 */
        .hero-title {
            font-size: 3.8rem;
            font-weight: 900;
            line-height: 1.1;
            background: linear-gradient(135deg, var(--main) 0%, var(--accent) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            letter-spacing: -0.02em;
        }
        .hero-sub {
            max-width: 720px;
            color: var(--muted);
            font-weight: 400;
            font-size: 1.15rem;
            margin: 1.5rem 0 2rem;
        }

        /* 对比表格 / 特色卡片极简无阴影 */
        .no-shadow {
            box-shadow: none !important;
            border: 1px solid rgba(148, 163, 184, 0.2);
            border-radius: 0.8rem;
        }
        .feature-icon {
            font-size: 2.2rem;
            color: var(--main);
            margin-bottom: 1rem;
        }
        .feature-card {
            background: transparent;
            border: 1px solid rgba(148, 163, 184, 0.2);
            border-radius: 1rem;
            padding: 1.8rem 1.5rem;
            transition: 0.2s;
        }
        .feature-card:hover {
            border-color: var(--main);
            background: rgba(34, 211, 238, 0.03);
        }
        .stat-num {
            font-family: 'SF Mono', 'Fira Code', monospace;
            font-weight: 600;
            color: var(--accent);
            font-size: 1.8rem;
        }

        /* 手风琴自定义 */
        .accordion-item {
            background: transparent;
            border: 1px solid rgba(148, 163, 184, 0.2);
            margin-bottom: 0.8rem;
            border-radius: 0.6rem !important;
            overflow: hidden;
        }
        .accordion-button {
            background: transparent;
            color: var(--text);
            font-weight: 600;
            box-shadow: none !important;
        }
        .accordion-button:not(.collapsed) {
            background: rgba(34, 211, 238, 0.06);
            color: var(--main);
        }
        .accordion-button::after {
            filter: invert(0.8);
        }
        .accordion-body {
            color: var(--muted);
        }

        /* 区块淡入动效 */
        .reveal {
            opacity: 0;
            transform: translateY(25px);
            transition: opacity 0.7s ease, transform 0.7s ease;
        }
        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }
        .reveal-delay-1 { transition-delay: 0.1s; }
        .reveal-delay-2 { transition-delay: 0.2s; }
        .reveal-delay-3 { transition-delay: 0.3s; }

        /* hover播放按钮中央浮现 (海报风格) */
        .poster-hover {
            position: relative;
            overflow: hidden;
            border-radius: 0.8rem;
            border: 1px solid rgba(148,163,184,0.2);
            aspect-ratio: 3/4;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(145deg, #1e293b, #0f172a);
        }
        .poster-hover img {
            width: 100%; height: 100%; object-fit: cover;
            opacity: 0.9;
            transition: 0.3s;
        }
        .play-btn {
            position: absolute;
            top: 50%; left: 50%;
            transform: translate(-50%, -50%) scale(0);
            background: rgba(15, 23, 42, 0.8);
            border: 2px solid var(--main);
            border-radius: 50%;
            width: 64px; height: 64px;
            display: flex; align-items: center; justify-content: center;
            color: var(--main);
            font-size: 1.5rem;
            transition: 0.2s;
            backdrop-filter: blur(2px);
        }
        .poster-hover:hover .play-btn {
            transform: translate(-50%, -50%) scale(1);
        }
        .poster-hover:hover img {
            transform: scale(1.03);
            filter: brightness(0.7);
        }

        /* 友情链接区域 */
        .friend-links {
            border-top: 1px solid rgba(148,163,184,0.2);
            border-bottom: 1px solid rgba(148,163,184,0.2);
            padding: 1.2rem 0;
            font-size: 0.9rem;
            color: var(--muted);
        }

        /* 数据字体等宽 */
        .mono-data {
            font-family: 'SF Mono', 'Menlo', monospace;
            font-size: 0.95rem;
        }

        /* 纯描边分割 */
        .section-divider {
            border-top: 1px solid rgba(148,163,184,0.15);
            margin: 2.5rem 0;
        }

        /* 页脚 */
        footer {
            border-top: 1px solid rgba(148,163,184,0.2);
            padding: 2rem 0 1.5rem;
            color: var(--muted);
        }

        /* 移动端适配 */
        @media (max-width: 768px) {
            .hero-title { font-size: 2.4rem; }
            .custom-nav .nav-link { margin: 0.2rem 0; }
        }

/* --- 子页面追加 --- */
/* 本页专属小范围样式 —— 仅覆盖排行榜特有组件 */
        .rank-hero {
            background: linear-gradient(135deg, rgba(34,211,238,0.12) 0%, rgba(251,146,60,0.08) 100%);
            border-bottom: 1px solid var(--border-glow);
            padding: 3.5rem 0 2.5rem;
        }
.rank-badge {
            background: var(--accent);
            color: #0b1120;
            font-weight: 800;
            font-size: 0.9rem;
            padding: 0.2rem 0.9rem;
            border-radius: 40px;
            display: inline-block;
            letter-spacing: 0.5px;
        }
.rank-card {
            background: var(--surface-dark);
            border: 1px solid rgba(34,211,238,0.15);
            border-radius: 24px;
            padding: 1.8rem 1.5rem;
            margin-bottom: 1.5rem;
            transition: all 0.25s ease;
            box-shadow: 0 8px 0 rgba(0,0,0,0.15);
        }
.rank-card:hover {
            border-color: var(--main);
            transform: translateY(-3px);
            box-shadow: 0 12px 0 rgba(0,0,0,0.2), 0 0 20px var(--border-glow);
        }
.rank-num {
            font-size: 2.8rem;
            font-weight: 900;
            line-height: 1;
            background: linear-gradient(145deg, var(--main), var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            margin-right: 1.2rem;
            min-width: 3.5rem;
        }
.rank-title {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.3rem;
        }
.rank-meta {
            color: var(--muted);
            font-size: 0.9rem;
            letter-spacing: 0.2px;
        }
.rank-tag {
            background: rgba(34,211,238,0.15);
            color: var(--main);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.2rem 0.8rem;
            border-radius: 30px;
            margin-right: 0.5rem;
            display: inline-block;
        }
.trend-up { color: #4ade80; }
.trend-down { color: #f87171; }
.trend-flat { color: var(--muted); }
.hot-keyword {
            background: rgba(251,146,60,0.08);
            border: 1px dashed rgba(251,146,60,0.3);
            border-radius: 40px;
            padding: 0.4rem 1.2rem;
            margin: 0.2rem 0.4rem;
            display: inline-block;
            color: var(--accent);
            font-size: 0.9rem;
            font-weight: 500;
        }
.table-rank {
            color: var(--text);
        }
.table-rank td {
            border-color: rgba(34,211,238,0.1);
            background: transparent;
            padding: 0.8rem 0.5rem;
        }
.table-rank th {
            border-color: rgba(34,211,238,0.15);
            color: var(--muted);
            font-weight: 600;
            font-size: 0.85rem;
        }
.section-title-icon {
            color: var(--main);
            margin-right: 0.5rem;
        }

/* --- 子页面追加 --- */
/* 本页专属小范围样式，自动合并进站点CSS */
        .about-hero {
            position: relative;
            padding: 80px 0 40px;
            text-align: center;
        }
.about-hero .hero-title {
            font-size: 2.6rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--main), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 20px;
        }
.about-section {
            background: var(--surface-dark);
            border-radius: 16px;
            padding: 40px;
            margin-bottom: 30px;
            border-left: 4px solid var(--main);
            position: relative;
            overflow: hidden;
        }
.about-section::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 100px;
            height: 100px;
            background: radial-gradient(circle, var(--border-glow), transparent 70%);
            opacity: 0.3;
        }
.about-section h2 {
            color: var(--main);
            font-weight: 700;
            margin-bottom: 20px;
            font-size: 1.5rem;
        }
.about-section h2 i {
            margin-right: 10px;
            color: var(--accent);
        }
.about-section p, .about-section li {
            color: var(--text);
            line-height: 1.8;
            font-size: 0.95rem;
        }
.about-section ul {
            padding-left: 20px;
        }
.about-section ul li {
            margin-bottom: 8px;
        }
.about-section .highlight {
            color: var(--accent);
            font-weight: 600;
        }
.stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 20px;
            margin-top: 20px;
        }
.stat-item {
            background: rgba(34, 211, 238, 0.08);
            border-radius: 12px;
            padding: 20px;
            text-align: center;
            border: 1px solid var(--border-glow);
        }
.stat-item .stat-num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--main);
        }
.stat-item .stat-label {
            color: var(--muted);
            font-size: 0.85rem;
            margin-top: 5px;
        }
.timeline {
            position: relative;
            padding-left: 30px;
            margin-top: 20px;
        }
.timeline::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--main);
            opacity: 0.3;
        }
.timeline-item {
            position: relative;
            margin-bottom: 20px;
        }
.timeline-item::before {
            content: '';
            position: absolute;
            left: -26px;
            top: 6px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--main);
            box-shadow: 0 0 10px var(--border-glow);
        }
.timeline-item .time {
            color: var(--accent);
            font-weight: 600;
            font-size: 0.9rem;
        }
.timeline-item .desc {
            color: var(--text);
            font-size: 0.9rem;
            margin-top: 4px;
        }
.value-card {
            background: rgba(15, 23, 42, 0.5);
            border-radius: 12px;
            padding: 24px;
            border: 1px solid var(--border-glow);
            transition: all 0.3s ease;
            height: 100%;
        }
.value-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 25px var(--border-glow);
        }
.value-card i {
            font-size: 2rem;
            color: var(--main);
            margin-bottom: 12px;
        }
.value-card h4 {
            color: var(--text);
            font-weight: 600;
            font-size: 1.1rem;
            margin-bottom: 10px;
        }
.value-card p {
            color: var(--muted);
            font-size: 0.9rem;
        }
.about-section ul.list-unstyled li {
            padding: 4px 0;
        }
.about-section ul.list-unstyled li i {
            color: var(--main);
            margin-right: 8px;
        }
.about-hero .hero-title {
                font-size: 2rem;
            }
.about-section {
                padding: 25px;
            }

/* --- Bootstrap 组件配色适配(程序自动补,避免白底黑字) --- */
.table { color:#e2e8f0 !important; border-color:rgba(255,255,255,.12) !important; --bs-table-bg:transparent !important; --bs-table-color:#e2e8f0 !important; }
.accordion-header { background:transparent !important; }