:root {
        --primary: #818cf8;
        --accent: #c084fc;
        --bg: #1e1b4b;
        --text: #e0e7ff;
        --card-bg: rgba(255, 255, 255, 0.04);
        --border: rgba(224, 231, 255, 0.08);
        --shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
    }
    * { margin: 0; padding: 0; box-sizing: border-box; }
    body {
        background-color: var(--bg);
        color: var(--text);
        font-family: 'Inter', sans-serif;
        font-size: 14px;
        line-height: 1.6;
        letter-spacing: 0.2px;
    }
    /* 噪点纹理 */
    body::before {
        content: "";
        position: fixed;
        top: 0; left: 0;
        width: 100%; height: 100%;
        pointer-events: none;
        z-index: 0;
        opacity: 0.25;
        background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.05'/%3E%3C/svg%3E");
    }
    .container { position: relative; z-index: 1; }

    /* 导航栏 */
    .navbar-custom {
        background: rgba(30, 27, 75, 0.6);
        backdrop-filter: blur(18px);
        border-bottom: 1px solid var(--border);
        transition: all 0.4s ease;
        padding: 12px 0;
        z-index: 1000;
    }
    .navbar-custom.scrolled {
        background: rgba(30, 27, 75, 0.95);
        box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
    }
    .navbar-brand {
        font-weight: 900;
        font-size: 1.4rem;
        color: var(--text) !important;
        letter-spacing: 1px;
    }
    .navbar-brand i { color: var(--accent); margin-right: 8px; }
    .nav-link {
        color: var(--text) !important;
        font-weight: 500;
        font-size: 0.9rem;
        margin: 0 8px;
        opacity: 0.8;
        transition: opacity 0.2s;
    }
    .nav-link:hover { opacity: 1; color: var(--primary) !important; }

    /* Hero 区 */
    .hero-section {
        padding: 140px 0 80px;
        background: radial-gradient(ellipse at 20% 30%, rgba(129, 140, 248, 0.15), transparent 60%), radial-gradient(ellipse at 80% 70%, rgba(192, 132, 252, 0.1), transparent 50%);
        border-bottom: 1px solid var(--border);
    }
    .hero-stats {
        display: flex;
        gap: 40px;
        margin-bottom: 30px;
    }
    .stat-item {
        text-align: center;
    }
    .stat-number {
        font-size: 3rem;
        font-weight: 900;
        color: var(--primary);
        font-family: 'JetBrains Mono', 'Inter', monospace;
        line-height: 1.1;
    }
    .stat-label {
        font-size: 0.8rem;
        opacity: 0.7;
        margin-top: 4px;
        letter-spacing: 1px;
    }
    .hero-title {
        font-size: 3.2rem;
        font-weight: 900;
        line-height: 1.15;
        margin-bottom: 20px;
    }
    .hero-title span { color: var(--accent); }
    .hero-desc {
        font-size: 1rem;
        opacity: 0.75;
        max-width: 600px;
        margin-bottom: 30px;
        line-height: 1.7;
    }
    .btn-custom {
        padding: 12px 28px;
        border-radius: 8px;
        font-weight: 600;
        font-size: 0.9rem;
        transition: all 0.3s;
        border: none;
    }
    .btn-primary-custom {
        background: linear-gradient(135deg, var(--primary), var(--accent));
        color: #fff;
    }
    .btn-primary-custom:hover {
        transform: translateY(-2px);
        box-shadow: 0 10px 25px rgba(129, 140, 248, 0.3);
        color: #fff;
    }
    .btn-outline-custom {
        background: transparent;
        border: 1px solid var(--border);
        color: var(--text);
    }
    .btn-outline-custom:hover {
        border-color: var(--primary);
        color: var(--primary);
    }

    /* 卡片网格 */
    .section-padding { padding: 70px 0; }
    .section-title {
        font-size: 1.8rem;
        font-weight: 800;
        margin-bottom: 10px;
    }
    .section-subtitle {
        opacity: 0.6;
        margin-bottom: 40px;
        font-size: 0.9rem;
    }
    .card-custom {
        background: var(--card-bg);
        border: 1px solid var(--border);
        border-radius: 8px;
        padding: 24px;
        transition: all 0.3s ease;
        height: 100%;
    }
    .card-custom:hover {
        background: rgba(255, 255, 255, 0.06);
        border-color: var(--primary);
        transform: translateY(-4px);
    }
    .card-icon {
        width: 46px;
        height: 46px;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: 8px;
        background: rgba(129, 140, 248, 0.1);
        border: 1px solid rgba(129, 140, 248, 0.2);
        margin-bottom: 16px;
        color: var(--primary);
        font-size: 1.1rem;
    }
    .card-title {
        font-weight: 700;
        font-size: 1rem;
        margin-bottom: 8px;
    }
    .card-text {
        opacity: 0.65;
        font-size: 0.85rem;
        line-height: 1.6;
    }

    /* 时间线 */
    .timeline {
        position: relative;
        padding-left: 30px;
    }
    .timeline::before {
        content: "";
        position: absolute;
        left: 8px;
        top: 0;
        bottom: 0;
        width: 1px;
        background: linear-gradient(to bottom, var(--primary), var(--accent));
    }
    .timeline-item {
        position: relative;
        margin-bottom: 30px;
    }
    .timeline-item::before {
        content: "";
        position: absolute;
        left: -26px;
        top: 4px;
        width: 12px;
        height: 12px;
        border-radius: 50%;
        background: var(--bg);
        border: 2px solid var(--primary);
    }
    .timeline-title {
        font-weight: 700;
        margin-bottom: 5px;
        font-size: 1rem;
    }
    .timeline-text {
        opacity: 0.6;
        font-size: 0.85rem;
        line-height: 1.6;
    }

    /* 标签页 */
    .nav-tabs-custom .nav-link {
        background: transparent;
        border: 1px solid var(--border);
        border-radius: 8px;
        margin: 0 4px;
        padding: 8px 18px;
        color: var(--text);
        font-weight: 600;
        font-size: 0.85rem;
    }
    .nav-tabs-custom .nav-link.active {
        background: linear-gradient(135deg, var(--primary), var(--accent));
        border: 1px solid transparent;
        color: #fff;
    }

    /* FAQ */
    .accordion-item {
        background: var(--card-bg);
        border: 1px solid var(--border);
        border-radius: 8px;
        margin-bottom: 12px;
        overflow: hidden;
    }
    .accordion-button {
        background: transparent;
        color: var(--text);
        font-weight: 600;
        font-size: 0.9rem;
        padding: 16px 20px;
        box-shadow: none !important;
    }
    .accordion-button:not(.collapsed) {
        background: rgba(129, 140, 248, 0.05);
        color: var(--primary);
    }
    .accordion-button::after {
        filter: invert(1) brightness(2);
    }
    .accordion-body {
        padding: 0 20px 18px;
        opacity: 0.7;
        font-size: 0.85rem;
    }

    /* CTA */
    .cta-section {
        padding: 70px 0;
        background: linear-gradient(135deg, rgba(129, 140, 248, 0.1), rgba(192, 132, 252, 0.1));
        border-top: 1px solid var(--border);
        border-bottom: 1px solid var(--border);
    }

    /* 长文 */
    .long-text {
        max-width: 800px;
        margin: 0 auto;
    }
    .long-text h3 {
        font-weight: 800;
        margin-bottom: 20px;
        font-size: 1.4rem;
    }
    .long-text p {
        opacity: 0.7;
        margin-bottom: 20px;
        line-height: 1.8;
        font-size: 0.9rem;
    }

    /* 页脚 */
    .footer {
        padding: 50px 0 30px;
        border-top: 1px solid var(--border);
        background: rgba(0, 0, 0, 0.2);
    }
    .footer-links a {
        color: var(--text);
        opacity: 0.6;
        margin: 0 15px;
        font-size: 0.85rem;
        text-decoration: none;
        transition: opacity 0.2s;
    }
    .footer-links a:hover { opacity: 1; color: var(--primary); }

    /* 海报 hover 效果 */
    .poster-card {
        position: relative;
        border-radius: 8px;
        overflow: hidden;
        aspect-ratio: 3/4;
        background: linear-gradient(145deg, rgba(129, 140, 248, 0.2), rgba(192, 132, 252, 0.15));
    }
    .poster-card .poster-overlay {
        position: absolute;
        inset: 0;
        background: rgba(30, 27, 75, 0.6);
        display: flex;
        align-items: center;
        justify-content: center;
        opacity: 0;
        transition: opacity 0.3s ease;
    }
    .poster-card:hover .poster-overlay {
        opacity: 1;
    }
    .poster-play-btn {
        width: 52px;
        height: 52px;
        border-radius: 50%;
        background: var(--accent);
        display: flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-size: 1.1rem;
        border: 2px solid rgba(255, 255, 255, 0.8);
    }

    /* 滚动渐显 */
    .reveal {
        opacity: 0;
        transform: translateY(30px);
        transition: opacity 0.6s ease, transform 0.6s ease;
    }
    .reveal.visible {
        opacity: 1;
        transform: translateY(0);
    }

    /* 等宽字体 */
    .mono-font {
        font-family: 'JetBrains Mono', 'Courier New', monospace;
    }

    /* 移动端 */
    @media (max-width: 768px) {
        .hero-title { font-size: 2.2rem; }
        .hero-stats { gap: 20px; flex-wrap: wrap; }
        .stat-number { font-size: 2.2rem; }
        .navbar-brand { font-size: 1.2rem; }
        .section-padding { padding: 50px 0; }
    }

/* --- 子页面追加 --- */
/* 本页专属少量样式，补充覆盖Bootstrap组件默认白底黑字 */
        .about-hero {
            background: linear-gradient(135deg, rgba(129, 140, 248, 0.15) 0%, rgba(192, 132, 252, 0.15) 100%);
            border-bottom: 1px solid var(--border);
            padding: 80px 0 60px;
        }
.about-hero h1 {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
.about-hero .lead {
            font-size: 1.2rem;
            color: var(--text);
            opacity: 0.9;
            max-width: 700px;
            margin: 0 auto;
        }
.about-section {
            padding: 60px 0;
        }
.about-section:nth-child(even) {
            background: rgba(255, 255, 255, 0.02);
        }
.about-section h2 {
            color: var(--primary);
            font-weight: 700;
            font-size: 1.8rem;
            margin-bottom: 24px;
            letter-spacing: -0.3px;
        }
.about-section h3 {
            color: var(--accent);
            font-weight: 600;
            font-size: 1.3rem;
            margin-top: 20px;
            margin-bottom: 12px;
        }
.about-section p {
            color: var(--text);
            opacity: 0.85;
            line-height: 1.8;
            margin-bottom: 16px;
        }
.feature-list {
            list-style: none;
            padding: 0;
            margin: 20px 0;
        }
.feature-list li {
            padding: 12px 0;
            border-bottom: 1px solid var(--border);
            display: flex;
            align-items: flex-start;
            gap: 12px;
            color: var(--text);
            opacity: 0.9;
        }
.feature-list li i {
            color: var(--primary);
            margin-top: 4px;
            min-width: 20px;
        }
.feature-list li:last-child {
            border-bottom: none;
        }
.philosophy-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 30px;
            height: 100%;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
.philosophy-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow);
        }
.philosophy-card .card-icon {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 16px;
        }
.philosophy-card h3 {
            color: var(--primary);
            font-weight: 600;
            font-size: 1.2rem;
            margin-bottom: 12px;
            margin-top: 0;
        }
.philosophy-card p {
            font-size: 0.95rem;
            margin-bottom: 0;
        }
.stats-mini {
            display: flex;
            gap: 40px;
            margin: 30px 0;
            flex-wrap: wrap;
        }
.stats-mini .stat-item {
            text-align: center;
        }
.stats-mini .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            display: block;
        }
.stats-mini .stat-label {
            font-size: 0.9rem;
            color: var(--text);
            opacity: 0.7;
        }
.about-hero h1 {
                font-size: 1.8rem;
            }
.about-hero .lead {
                font-size: 1rem;
            }
.about-section h2 {
                font-size: 1.4rem;
            }
.stats-mini {
                gap: 24px;
            }

/* --- 子页面追加 --- */
.disclaimer-hero {
            background: linear-gradient(135deg, rgba(129, 140, 248, 0.1) 0%, rgba(192, 132, 252, 0.05) 100%);
            border-bottom: 1px solid var(--border);
        }
.disclaimer-section {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 1rem;
            padding: 2rem 1.8rem;
            margin-bottom: 1.8rem;
            box-shadow: var(--shadow);
            transition: transform .2s ease;
        }
.disclaimer-section:hover {
            transform: translateY(-2px);
            border-color: rgba(192, 132, 252, 0.2);
        }
.disclaimer-section h2, .disclaimer-section h3 {
            color: var(--primary);
            font-weight: 700;
            letter-spacing: -0.01em;
            margin-bottom: 1.2rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
.disclaimer-section h2 i, .disclaimer-section h3 i {
            color: var(--accent);
            font-size: 1.4rem;
        }
.disclaimer-section p, .disclaimer-section li {
            color: var(--text);
            opacity: 0.9;
            line-height: 1.8;
        }
.disclaimer-section ul {
            padding-left: 1.2rem;
            margin-top: 0.8rem;
        }
.disclaimer-section li {
            margin-bottom: 0.5rem;
        }
.highlight-text {
            color: var(--accent);
            font-weight: 600;
        }
.small-note {
            font-size: 0.9rem;
            opacity: 0.7;
            border-top: 1px dashed var(--border);
            padding-top: 1rem;
            margin-top: 1.5rem;
        }
.btn-custom:hover {
            background: var(--primary);
            color: #1e1b4b;
            border-color: var(--primary);
        }
/* 覆盖bootstrap nav-link 颜色 */
        .navbar-nav .nav-link {
            color: var(--text);
        }
.navbar-nav .nav-link:hover {
            color: var(--primary);
        }

/* --- 子页面追加 --- */
/* 隐私政策页专属样式 */
        .privacy-hero {
            padding: 120px 0 60px;
            text-align: center;
            background: linear-gradient(135deg, rgba(129, 140, 248, 0.15) 0%, rgba(192, 132, 252, 0.15) 100%);
            border-bottom: 1px solid var(--border);
        }
.privacy-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            margin-bottom: 1rem;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
.privacy-hero p {
            font-size: 1.1rem;
            color: rgba(224, 231, 255, 0.8);
            max-width: 700px;
            margin: 0 auto;
        }
.privacy-section {
            padding: 60px 0;
            border-bottom: 1px solid var(--border);
        }
.privacy-section:last-child {
            border-bottom: none;
        }
.privacy-section h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 1.5rem;
            position: relative;
            padding-bottom: 0.5rem;
        }
.privacy-section h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 2px;
        }
.privacy-section h3 {
            font-size: 1.3rem;
            font-weight: 600;
            color: var(--text);
            margin: 1.5rem 0 1rem;
        }
.privacy-section p {
            color: rgba(224, 231, 255, 0.75);
            line-height: 1.8;
            margin-bottom: 1rem;
        }
.privacy-section ul {
            color: rgba(224, 231, 255, 0.75);
            line-height: 1.8;
            padding-left: 1.5rem;
            margin-bottom: 1.5rem;
        }
.privacy-section li {
            margin-bottom: 0.5rem;
        }
.privacy-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 2rem;
            margin: 1.5rem 0;
            transition: all 0.3s ease;
        }
.privacy-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow);
            transform: translateY(-2px);
        }
.privacy-badge {
            display: inline-block;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            padding: 0.3rem 1rem;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 1rem;
        }
.contact-box {
            background: linear-gradient(135deg, rgba(129, 140, 248, 0.1), rgba(192, 132, 252, 0.1));
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 2rem;
            margin-top: 2rem;
        }
.contact-box i {
            color: var(--accent);
            margin-right: 0.5rem;
        }
.last-updated {
            color: rgba(224, 231, 255, 0.5);
            font-size: 0.9rem;
            text-align: center;
            margin-top: 2rem;
        }
.privacy-hero h1 {
                font-size: 2rem;
            }
.privacy-section h2 {
                font-size: 1.4rem;
            }
.privacy-card {
                padding: 1.5rem;
            }

/* --- 子页面追加 --- */
/* 本页专属样式 —— 排行榜专用 */
        .ranking-hero {
            background: linear-gradient(135deg, rgba(129, 140, 248, 0.15) 0%, rgba(192, 132, 252, 0.1) 100%);
            border-bottom: 1px solid var(--border);
            padding: 80px 0 60px;
        }
.ranking-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 16px;
        }
.ranking-hero p {
            color: rgba(224, 231, 255, 0.8);
            font-size: 1.1rem;
            max-width: 700px;
            margin: 0 auto;
        }
.ranking-tabs {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            justify-content: center;
            margin: 40px 0 30px;
        }
.ranking-tab {
            padding: 10px 24px;
            border-radius: 30px;
            border: 1px solid var(--border);
            background: var(--card-bg);
            color: var(--text);
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: all 0.3s ease;
        }
.ranking-tab:hover, .ranking-tab.active {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            box-shadow: 0 4px 15px rgba(129, 140, 248, 0.3);
        }
.rank-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 24px;
            margin-bottom: 20px;
            transition: all 0.3s ease;
            display: flex;
            gap: 20px;
            align-items: center;
        }
.rank-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
            border-color: rgba(129, 140, 248, 0.3);
        }
.rank-number {
            font-size: 2.2rem;
            font-weight: 900;
            color: var(--primary);
            min-width: 60px;
            text-align: center;
            font-style: italic;
        }
.rank-card:nth-child(2) .rank-number { color: #ffd700; }
.rank-card:nth-child(3) .rank-number { color: #c0c0c0; }
.rank-card:nth-child(4) .rank-number { color: #cd7f32; }
.rank-info {
            flex: 1;
        }
.rank-title {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
        }
.rank-meta {
            color: rgba(224, 231, 255, 0.7);
            font-size: 0.9rem;
            margin-bottom: 8px;
        }
.rank-desc {
            color: rgba(224, 231, 255, 0.6);
            font-size: 0.95rem;
            line-height: 1.6;
        }
.rank-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            margin-top: 10px;
        }
.rank-tag {
            padding: 4px 12px;
            border-radius: 20px;
            background: rgba(129, 140, 248, 0.15);
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 600;
        }
.rank-actions {
            display: flex;
            flex-direction: column;
            gap: 8px;
            align-items: flex-end;
        }
.rank-score {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--accent);
        }
.rank-score-label {
            font-size: 0.8rem;
            color: rgba(224, 231, 255, 0.5);
        }
.rank-btn {
            padding: 8px 20px;
            border-radius: 8px;
            border: 1px solid var(--border);
            background: transparent;
            color: var(--text);
            font-size: 0.9rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
        }
.rank-btn:hover {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }
.weekly-feature {
            background: linear-gradient(135deg, rgba(129, 140, 248, 0.1) 0%, rgba(192, 132, 252, 0.1) 100%);
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 40px;
            margin: 40px 0;
        }
.weekly-feature h2 {
            color: var(--text);
            font-weight: 700;
            margin-bottom: 20px;
        }
.editor-pick {
            border-left: 4px solid var(--accent);
            background: rgba(192, 132, 252, 0.08);
            padding: 20px;
            border-radius: 0 12px 12px 0;
            margin-bottom: 15px;
        }
.editor-pick .pick-title {
            font-weight: 700;
            color: var(--text);
            margin-bottom: 5px;
        }
.editor-pick .pick-desc {
            color: rgba(224, 231, 255, 0.7);
            font-size: 0.95rem;
        }
.ranking-hero h1 { font-size: 2rem; }
.rank-card { flex-direction: column; text-align: center; }
.rank-actions { align-items: center; }
.rank-number { min-width: auto; }
.weekly-feature { padding: 24px; }

/* --- Bootstrap 组件配色适配(程序自动补,避免白底黑字) --- */
.accordion-header { background:transparent !important; }