:root {
            --primary: #2563eb;
            --accent: #06b6d4;
            --bg: #f8fafc;
            --text: #0f172a;
            --radius-card: 20px;
            --radius-pill: 50px;
            --shadow-sm: 0 8px 20px rgba(2, 6, 23, 0.04);
        }

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

        body {
            background-color: var(--bg);
            color: var(--text);
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
            line-height: 1.7;
            overflow-x: hidden;
        }

        /* 滚动进度条 */
        #progress-bar {
            position: fixed;
            top: 0;
            left: 0;
            height: 4px;
            width: 0%;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            z-index: 9999;
            transition: width 0.08s linear;
            border-radius: 0 4px 4px 0;
        }

        /* 导航栏 */
        .navbar-custom {
            background: rgba(255, 255, 255, 0.6);
            backdrop-filter: blur(15px);
            border-bottom: 1px solid rgba(37, 99, 235, 0.08);
            padding: 0.9rem 0;
            transition: background 0.3s, box-shadow 0.3s;
        }
        .navbar-custom.scrolled {
            background: rgba(248, 250, 252, 0.9);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
        }
        .navbar-custom .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--text);
            letter-spacing: -0.02em;
        }
        .navbar-custom .navbar-brand i {
            color: var(--primary);
            margin-right: 6px;
        }
        .navbar-custom .nav-link {
            font-weight: 600;
            color: var(--text);
            margin: 0 0.8rem;
            transition: color 0.2s;
        }
        .navbar-custom .nav-link:hover { color: var(--primary); }

        /* Hero 区 */
        .hero-section {
            padding: 6rem 0 4rem;
            background: linear-gradient(135deg, #ffffff 0%, var(--bg) 100%);
            position: relative;
            overflow: hidden;
        }
        .hero-title {
            font-weight: 900;
            font-size: calc(3rem + 1.5vw);
            line-height: 1.15;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-sub { font-size: 1.2rem; color: #334155; max-width: 600px; }
        .btn-pill {
            border-radius: var(--radius-pill);
            padding: 0.7rem 2rem;
            font-weight: 600;
            border: none;
            background: var(--primary);
            color: white;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
            transition: all 0.2s;
        }
        .btn-pill:hover { transform: translateY(-2px); background: #1d4ed8; box-shadow: 0 8px 20px rgba(37, 99, 235, 0.35); }
        .btn-outline-pill {
            border-radius: var(--radius-pill);
            padding: 0.7rem 2rem;
            font-weight: 600;
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
        }
        .btn-outline-pill:hover { background: rgba(37, 99, 235, 0.04); }

        .float-deco {
            position: absolute;
            border-radius: 40% 60% 70% 30% / 40% 40% 60% 60%;
            background: linear-gradient(45deg, rgba(6, 182, 212, 0.1), rgba(37, 99, 235, 0.1));
            filter: blur(30px);
            width: 300px;
            height: 300px;
            top: -50px;
            right: -20px;
            animation: float 8s infinite alternate;
        }
        @keyframes float {
            0% { transform: translate(0, 0) rotate(0deg); }
            100% { transform: translate(-30px, 30px) rotate(20deg); }
        }

        /* 卡片区 */
        .card-custom {
            background: white;
            border-radius: var(--radius-card);
            border: 1px solid rgba(15, 23, 42, 0.03);
            box-shadow: var(--shadow-sm);
            padding: 2rem 1.6rem;
            transition: 0.25s;
            height: 100%;
        }
        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 35px rgba(2, 6, 23, 0.07);
            border-color: rgba(37, 99, 235, 0.1);
        }
        .icon-bg {
            width: 64px;
            height: 64px;
            background: rgba(37, 99, 235, 0.06);
            border-radius: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
        }
        .icon-bg i { font-size: 2rem; color: var(--primary); }

        /* 长文介绍 */
        .section-wave {
            position: relative;
            background: white;
            border-radius: 0 0 50% 20% / 0 0 40px 20px;
            padding: 4rem 0;
        }
        .accordion-custom {
            --bs-accordion-border-color: rgba(37, 99, 235, 0.1);
            --bs-accordion-bg: white;
            border-radius: 18px;
            overflow: hidden;
        }
        .accordion-custom .accordion-item {
            border: 1px solid rgba(15, 23, 42, 0.06);
            margin-bottom: 12px;
            border-radius: 16px !important;
            box-shadow: 0 2px 8px rgba(0,0,0,0.02);
        }
        .accordion-custom .accordion-button {
            font-weight: 700;
            background: white;
            color: var(--text);
            padding: 1.1rem 1.3rem;
        }
        .accordion-custom .accordion-button:not(.collapsed) {
            background: rgba(37, 99, 235, 0.02);
            color: var(--primary);
            box-shadow: none;
        }

        /* FAQ */
        .faq-item {
            background: white;
            border-radius: 20px;
            box-shadow: var(--shadow-sm);
            padding: 1.5rem 2rem;
            margin-bottom: 1rem;
        }

        /* CTA */
        .cta-banner {
            background: linear-gradient(120deg, var(--primary), var(--accent));
            border-radius: 40px;
            padding: 3.5rem 2rem;
            color: white;
            text-align: center;
        }

        /* 页脚 */
        footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 3rem 0 2rem;
            border-radius: 50px 50px 0 0;
            margin-top: 4rem;
        }
        footer a { color: #cbd5e1; text-decoration: none; font-weight: 500; }
        footer a:hover { color: white; }

        /* 友情链接 */
        .friend-links {
            background: white;
            border-radius: 40px;
            padding: 2rem;
            border: 1px solid rgba(37, 99, 235, 0.05);
            margin: 3rem 0;
        }

        /* 移动端调整 */
        @media (max-width: 768px) {
            .hero-title { font-size: 2.7rem; }
            .navbar-collapse { background: rgba(255,255,255,0.95); padding: 1rem; border-radius: 20px; }
        }

        /* 波浪斜切分隔 */
        .divider-wave {
            height: 40px;
            background: linear-gradient(to top left, var(--bg) 0%, var(--bg) 50%, white 50%, white 100%);
        }

/* --- 子页面追加 --- */
/* 本页专属微调样式（保持站点整体风格） */
        .about-hero {
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.06) 0%, rgba(6, 182, 212, 0.04) 100%);
            border-bottom: 1px solid rgba(37, 99, 235, 0.08);
        }
.about-section {
            padding: 80px 0;
        }
.about-card {
            background: var(--bg);
            border: 1px solid rgba(37, 99, 235, 0.08);
            border-radius: var(--radius-card);
            padding: 32px;
            transition: all 0.3s ease;
            height: 100%;
        }
.about-card:hover {
            box-shadow: 0 12px 30px rgba(2, 6, 23, 0.08);
            transform: translateY(-4px);
        }
.about-icon {
            width: 52px;
            height: 52px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 20px;
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(6, 182, 212, 0.1));
            color: var(--primary);
        }
.about-highlight {
            color: var(--primary);
            font-weight: 600;
        }
.about-quote {
            border-left: 4px solid var(--primary);
            background: rgba(37, 99, 235, 0.03);
            padding: 24px 28px;
            border-radius: 0 var(--radius-card) var(--radius-card) 0;
            margin: 40px 0;
            font-size: 1.05rem;
            line-height: 1.8;
            color: var(--text);
        }
.stat-item {
            text-align: center;
            padding: 28px 16px;
        }
.stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
.stat-label {
            color: rgba(15, 23, 42, 0.6);
            font-size: 0.95rem;
            margin-top: 6px;
        }
.about-list {
            list-style: none;
            padding-left: 0;
        }
.about-list li {
            padding: 10px 0;
            padding-left: 32px;
            position: relative;
            color: rgba(15, 23, 42, 0.8);
        }
.about-list li::before {
            content: '\f00c';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            left: 0;
            color: var(--primary);
        }

/* --- 子页面追加 --- */
/* 本页专属小范围样式 */
        .legal-hero {
            background: linear-gradient(135deg, rgba(37,99,235,0.08) 0%, rgba(6,182,212,0.08) 100%);
            padding: 80px 0 40px;
            border-radius: 0 0 30px 30px;
        }
.legal-card {
            background: #fff;
            border-radius: var(--radius-card);
            padding: 2.5rem;
            margin-bottom: 1.5rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid rgba(15,23,42,0.05);
            transition: transform .2s ease;
        }
.legal-card:hover {
            transform: translateY(-3px);
        }
.legal-card h2 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
.legal-card h2 i {
            color: var(--accent);
        }
.legal-card p, .legal-card li {
            color: #334155;
            line-height: 1.8;
            font-size: 0.95rem;
        }
.legal-card ul {
            padding-left: 1.2rem;
        }
.legal-card li {
            margin-bottom: 0.5rem;
        }
.legal-note {
            background: rgba(37,99,235,0.05);
            border-left: 4px solid var(--primary);
            padding: 1.2rem 1.5rem;
            border-radius: 0 12px 12px 0;
            margin-top: 1.5rem;
        }
.legal-note p {
            margin: 0;
            font-size: 0.9rem;
            color: #475569;
        }
.legal-card {
                padding: 1.5rem;
            }
.legal-hero {
                padding: 60px 0 30px;
            }

/* --- 子页面追加 --- */
/* 排行榜页专属样式 */
        .ranking-hero {
            background: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
            padding: 80px 0 60px;
            position: relative;
            overflow: hidden;
        }
.ranking-hero h1 {
            color: #fff;
            font-weight: 800;
            font-size: 2.8rem;
            position: relative;
            z-index: 2;
        }
.ranking-hero p {
            color: rgba(255,255,255,.9);
            font-size: 1.1rem;
            position: relative;
            z-index: 2;
        }
.rank-card {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            padding: 24px;
            margin-bottom: 30px;
            transition: transform .3s ease, box-shadow .3s ease;
            border: 1px solid rgba(2, 6, 23, .06);
        }
.rank-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 32px rgba(2, 6, 23, .08);
        }
.rank-tabs {
            display: flex;
            gap: 12px;
            margin-bottom: 32px;
            flex-wrap: wrap;
        }
.rank-tab {
            padding: 10px 28px;
            border-radius: var(--radius-pill);
            background: #f1f5f9;
            color: #475569;
            font-weight: 600;
            font-size: .95rem;
            border: 2px solid transparent;
            cursor: pointer;
            transition: all .25s ease;
        }
.rank-tab.active, .rank-tab:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
.rank-item {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 16px 0;
            border-bottom: 1px solid rgba(2, 6, 23, .06);
        }
.rank-item:last-child {
            border-bottom: none;
        }
.rank-num {
            font-size: 1.6rem;
            font-weight: 900;
            color: var(--primary);
            min-width: 48px;
            text-align: center;
        }
.rank-num.top-1 { color: #f59e0b; font-size: 2rem; }
.rank-num.top-2 { color: #94a3b8; font-size: 1.8rem; }
.rank-num.top-3 { color: #d97706; font-size: 1.7rem; }
.rank-cover {
            width: 70px;
            height: 95px;
            border-radius: 8px;
            object-fit: cover;
            background: #f1f5f9;
        }
.rank-info {
            flex: 1;
            min-width: 0;
        }
.rank-info h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 4px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
.rank-info p {
            font-size: .85rem;
            color: #64748b;
            margin-bottom: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
.rank-meta {
            display: flex;
            gap: 16px;
            font-size: .8rem;
            color: #94a3b8;
        }
.rank-meta i {
            color: var(--accent);
            margin-right: 4px;
        }
.rank-arrow {
            color: #cbd5e1;
            font-size: 1.2rem;
        }
.section-title {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 12px;
            position: relative;
            padding-bottom: 12px;
        }
.section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 2px;
        }
.section-sub {
            color: #64748b;
            font-size: 1rem;
            margin-bottom: 40px;
        }
.update-badge {
            background: #f0fdf4;
            color: #16a34a;
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            font-size: .85rem;
            font-weight: 600;
            display: inline-block;
            margin-bottom: 16px;
        }
.ranking-hero h1 { font-size: 2rem; }
.rank-item { gap: 12px; }
.rank-num { font-size: 1.2rem; min-width: 36px; }
.rank-num.top-1 { font-size: 1.5rem; }
.rank-num.top-2 { font-size: 1.3rem; }
.rank-num.top-3 { font-size: 1.2rem; }
.rank-cover { width: 56px; height: 76px; }

/* --- 子页面追加 --- */
/* 确保Bootstrap组件融入深色/浅色主题 */
        .card, .card-body, .accordion-item, .accordion-button, .list-group-item {
            background: var(--bg);
            color: var(--text);
            border-color: rgba(2, 6, 23, 0.08);
        }
.accordion-button:focus {
            box-shadow: none;
            border-color: rgba(37, 99, 235, 0.3);
        }
.form-control, .form-select {
            background: white;
            color: var(--text);
            border-color: rgba(2, 6, 23, 0.1);
        }
.form-control::placeholder {
            color: #94a3b8;
        }
/* 覆盖导航栏保持透明风格 */
        .navbar-custom {
            background: rgba(248, 250, 252, 0.8) !important;
            backdrop-filter: blur(8px);
        }
.navbar-custom .nav-link.active {
            color: var(--primary) !important;
            font-weight: 600;
        }
/* 本页自定义小块 */
        .guide-card {
            background: var(--bg);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            padding: 1.75rem;
            transition: transform .2s ease;
        }
.guide-card:hover {
            transform: translateY(-4px);
        }
.step-icon {
            background: rgba(37, 99, 235, 0.1);
            color: var(--primary);
            width: 48px;
            height: 48px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
        }
.tip-badge {
            background: rgba(6, 182, 212, 0.12);
            color: #0e7490;
            padding: 0.2rem 0.9rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.8rem;
            display: inline-block;
        }
.kbd-like {
            background: #e2e8f0;
            padding: 0.2rem 0.6rem;
            border-radius: 6px;
            font-family: monospace;
            font-size: 0.9rem;
        }

/* --- Bootstrap 组件配色适配(程序自动补,避免白底黑字) --- */
.accordion-body { background:transparent !important; color:#0f172a !important; }
.accordion-header { background:transparent !important; }