:root {
            --primary: #38bdf8;
            --accent: #a78bfa;
            --bg-deep: #0f172a;
            --text-main: #e2e8f0;
            --card-bg: rgba(30, 41, 59, 0.65);
            --radius-card: 1.25rem;
            --radius-full: 50rem;
            --shadow-soft: 0 12px 28px rgba(0, 0, 0, 0.4);
            --shadow-hover: 0 20px 36px rgba(56, 189, 248, 0.15), 0 8px 20px rgba(0, 0, 0, 0.5);
        }

        * {
            box-sizing: border-box;
        }

        body {
            background-color: var(--bg-deep);
            color: var(--text-main);
            font-family: 'Inter', '思源黑体', 'Source Han Sans SC', system-ui, -apple-system, sans-serif;
            font-weight: 400;
            line-height: 1.8;
            letter-spacing: 0.01em;
            overflow-x: hidden;
            scroll-behavior: smooth;
        }

        /* 思源宋体标题 */
        h1, h2, h3, h4, .serif-title {
            font-family: 'Source Han Serif SC', '思源宋体', 'Songti SC', Georgia, serif;
            font-weight: 700;
            letter-spacing: 0.02em;
        }

        /* 胶囊圆角，卡片中等圆角 */
        .btn-capsule {
            border-radius: var(--radius-full);
            padding: 0.7rem 2rem;
            font-weight: 600;
            transition: all 0.2s ease;
        }

        .card-soft {
            background: var(--card-bg);
            backdrop-filter: blur(4px);
            border: 1px solid rgba(148, 163, 184, 0.15);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-soft);
            transition: transform 0.25s ease, box-shadow 0.3s ease;
        }

        .card-soft:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(56, 189, 248, 0.4);
        }

        .navbar-custom {
            background: rgba(15, 23, 42, 0.75);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(56, 189, 248, 0.2);
            padding: 0.9rem 0;
        }

        .navbar-brand {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary) !important;
            letter-spacing: 0.02em;
            font-family: 'Source Han Serif SC', serif;
        }

        .navbar-brand i {
            color: var(--accent);
            margin-right: 0.5rem;
            font-size: 1.8rem;
        }

        .nav-link-custom {
            color: var(--text-main) !important;
            font-weight: 500;
            margin: 0 0.8rem;
            padding: 0.5rem 0.8rem;
            border-radius: var(--radius-full);
            transition: all 0.2s;
        }

        .nav-link-custom:hover {
            color: var(--primary) !important;
            background: rgba(56, 189, 248, 0.1);
        }

        .hero-section {
            padding: 5rem 0 4rem;
            text-align: center;
        }

        .hero-gradient {
            background: linear-gradient(120deg, var(--primary) 0%, var(--accent) 90%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            font-size: 3.6rem;
            font-weight: 800;
            line-height: 1.3;
            display: inline-block;
            animation: floatGlow 4s infinite alternate ease-in-out;
            filter: drop-shadow(0 0 24px rgba(167, 139, 250, 0.25));
        }

        @keyframes floatGlow {
            0% { transform: translateY(0); filter: drop-shadow(0 0 15px rgba(56,189,248,0.3)); }
            100% { transform: translateY(-10px); filter: drop-shadow(0 0 35px rgba(167,139,250,0.5)); }
        }

        .hero-sub {
            font-size: 1.4rem;
            color: #94a3b8;
            margin-top: 1.5rem;
            font-weight: 300;
        }

        .feature-icon {
            font-size: 2.2rem;
            background: linear-gradient(145deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            margin-bottom: 0.75rem;
            display: inline-block;
        }

        .feature-card h3 {
            font-size: 1.5rem;
            margin-bottom: 0.5rem;
            color: #f1f5f9;
        }

        .accordion-item {
            background: transparent;
            border: 1px solid rgba(148, 163, 184, 0.2);
            border-radius: 1rem !important;
            margin-bottom: 1rem;
            overflow: hidden;
        }

        .accordion-button {
            background: rgba(30, 41, 59, 0.5);
            color: var(--text-main);
            font-weight: 600;
            font-size: 1.1rem;
            border-radius: 1rem !important;
            box-shadow: none;
            font-family: 'Inter', sans-serif;
            padding: 1.2rem 1.4rem;
        }

        .accordion-button:not(.collapsed) {
            background: rgba(56, 189, 248, 0.15);
            color: var(--primary);
        }

        .accordion-button:focus {
            box-shadow: 0 0 0 0.2rem rgba(56,189,248,0.15);
        }

        .accordion-body {
            background: rgba(15, 23, 42, 0.6);
            color: #cbd5e1;
            padding: 1.4rem 1.5rem;
        }

        .btn-primary-custom {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border: none;
            color: #0f172a;
            font-weight: 700;
            box-shadow: 0 8px 20px rgba(167, 139, 250, 0.25);
        }

        .btn-primary-custom:hover {
            color: #fff;
            transform: scale(1.03);
        }

        .friend-links a {
            color: #94a3b8;
            text-decoration: none;
            margin: 0 0.5rem;
            transition: color 0.2s;
        }

        .friend-links a:hover {
            color: var(--primary);
        }

        footer {
            border-top: 1px solid rgba(148, 163, 184, 0.1);
            background: rgba(2, 6, 23, 0.4);
            padding: 2rem 0;
            color: #94a3b8;
        }

        #backToTop {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            width: 3.2rem;
            height: 3.2rem;
            border-radius: 50%;
            background: rgba(15, 23, 42, 0.8);
            border: 1px solid rgba(56,189,248,0.4);
            color: var(--primary);
            font-size: 1.4rem;
            box-shadow: var(--shadow-soft);
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.3s, visibility 0.3s, transform 0.2s;
            z-index: 999;
            backdrop-filter: blur(8px);
        }

        #backToTop.show {
            opacity: 1;
            visibility: visible;
        }

        #backToTop:hover {
            background: var(--primary);
            color: #0f172a;
            border-color: var(--primary);
            transform: translateY(-4px);
        }

        .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }

        .section-title {
            font-size: 2.2rem;
            margin-bottom: 2rem;
            position: relative;
            display: inline-block;
            padding-bottom: 0.5rem;
        }

        .section-title::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), transparent);
            border-radius: 3px;
        }

        .list-icon-item {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            margin-bottom: 0.8rem;
            color: #cbd5e1;
        }

        .list-icon-item i {
            color: var(--accent);
            width: 1.5rem;
        }

        .bg-soft {
            background: rgba(148, 163, 184, 0.05);
            border-radius: var(--radius-card);
        }

        /* 滚动偏移 */
        section {
            scroll-margin-top: 90px;
        }

        .container-narrow {
            max-width: 840px;
            margin: 0 auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

/* --- 子页面追加 --- */
/* 页面专属少量样式 */
        .about-hero {
            background: linear-gradient(135deg, rgba(15,23,42,0.9) 0%, rgba(30,41,59,0.7) 50%, rgba(56,189,248,0.15) 100%);
            position: relative;
            overflow: hidden;
        }
.about-hero::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(167,139,250,0.15) 0%, transparent 70%);
            border-radius: 50%;
        }
.about-section {
            padding: 4rem 0;
        }
.about-card {
            background: var(--card-bg);
            border: 1px solid rgba(148, 163, 184, 0.1);
            border-radius: var(--radius-card);
            padding: 2rem;
            height: 100%;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
.about-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
.about-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: #fff;
            margin-bottom: 1.2rem;
        }
.timeline {
            position: relative;
            padding-left: 2rem;
            border-left: 2px solid rgba(56, 189, 248, 0.3);
        }
.timeline-item {
            position: relative;
            padding-bottom: 2.5rem;
        }
.timeline-item::before {
            content: '';
            position: absolute;
            left: -2.45rem;
            top: 0.3rem;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--primary);
            border: 3px solid var(--bg-deep);
            box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
        }
.timeline-item:last-child {
            padding-bottom: 0;
        }
.stat-box {
            text-align: center;
            padding: 1.5rem;
            background: rgba(56, 189, 248, 0.05);
            border-radius: var(--radius-card);
            border: 1px solid rgba(56, 189, 248, 0.1);
        }
.stat-label {
            color: var(--text-main);
            opacity: 0.8;
            font-size: 0.9rem;
            margin-top: 0.3rem;
        }
.value-list li {
            padding: 0.6rem 0;
            color: var(--text-main);
            display: flex;
            align-items: flex-start;
            gap: 0.8rem;
        }
.value-list i {
            color: var(--primary);
            margin-top: 0.2rem;
        }
.about-section {
                padding: 2.5rem 0;
            }
.about-card {
                padding: 1.5rem;
            }
.timeline {
                padding-left: 1.5rem;
            }

/* --- 子页面追加 --- */
/* 本页专属样式 */
        .disclaimer-section { padding: 3rem 0; }
.disclaimer-card { background: var(--card-bg); border-radius: var(--radius-card); padding: 2rem; margin-bottom: 1.5rem; box-shadow: var(--shadow-soft); }
.disclaimer-card h2 { color: var(--primary); font-weight: 700; margin-bottom: 1.25rem; }
.disclaimer-card h3 { color: var(--accent); font-weight: 600; margin-top: 1.5rem; margin-bottom: 1rem; }
.disclaimer-card p, .disclaimer-card li { color: var(--text-main); line-height: 1.8; }
.disclaimer-card ul { padding-left: 1.5rem; }
.disclaimer-card ul li { margin-bottom: 0.75rem; }
.highlight-box { background: rgba(56, 189, 248, 0.1); border-left: 4px solid var(--primary); padding: 1.25rem 1.5rem; border-radius: 0 0.75rem 0.75rem 0; margin: 1.5rem 0; }
.highlight-box p { margin: 0; }
.last-updated { font-size: 0.9rem; color: rgba(226, 232, 240, 0.6); text-align: right; margin-top: 1rem; }
.contact-info { display: flex; align-items: center; gap: 0.75rem; color: var(--primary); font-weight: 500; }
.contact-info i { font-size: 1.25rem; }
.disclaimer-card { padding: 1.5rem; }

/* --- 子页面追加 --- */
覆盖全局，仅本页微调用内联 style 块） -->
    <link rel="stylesheet" href="/css/style.css">

    <!-- 本页专属极少量补充样式（不影响全局） -->
    <style>
        /* 确保 bootstrap 的卡片等组件在本页也使用站点配色（仅限本页覆盖） */
        .card, .card-body, .card-title, .card-text, .card-header, .card-footer {
            background: var(--card-bg);
            color: var(--text-main);
            border-color: rgba(255,255,255,0.1);
        }
.form-control, .form-select {
            background-color: rgba(15, 23, 42, 0.7);
            color: var(--text-main);
            border: 1px solid rgba(255,255,255,0.2);
        }
.form-control:focus, .form-select:focus {
            background-color: rgba(15, 23, 42, 0.9);
            color: var(--text-main);
        }
.form-control::placeholder {
            color: rgba(255,255,255,0.4);
        }
.list-group-item {
            background-color: transparent;
            color: var(--text-main);
            border-color: rgba(255,255,255,0.1);
        }
.accordion-item, .accordion-button, .accordion-body {
            background: var(--card-bg);
            color: var(--text-main);
        }
/* 本页卡片悬停效果（沿用站点风格） */
        .subscribe-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            transition: 0.3s ease;
        }
.price-badge {
            background: var(--accent);
            color: #0f172a;
            font-weight: 700;
        }
/* 高亮当前页导航 */
        .navbar-nav .nav-link.active {
            color: var(--primary) !important;
            font-weight: 600;
        }
.icon-check {
            color: var(--primary);
            margin-right: 8px;
        }

/* --- 子页面追加 --- */
/* 本页专属微调样式 */
        .privacy-section { padding: 3rem 0; }
.privacy-card { background: var(--card-bg); border-radius: var(--radius-card); padding: 2rem; margin-bottom: 1.5rem; box-shadow: var(--shadow-soft); }
.privacy-card:hover { box-shadow: var(--shadow-hover); }
.privacy-icon { color: var(--primary); font-size: 1.75rem; margin-bottom: 1rem; }
.privacy-list li { margin-bottom: 0.75rem; color: var(--text-main); }
.privacy-list li i { color: var(--primary); margin-right: 0.5rem; }
.highlight-text { color: var(--primary); font-weight: 600; }
.accent-text { color: var(--accent); font-weight: 600; }
.nav-link-custom.active { color: var(--primary) !important; }

/* --- 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; }