:root {
            --primary: #eab308;
            --accent: #f59e0b;
            --bg: #18181b;
            --text: #fafafa;
            --border: #3f3f46;
            --card-bg: #1f1f23;
        }

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

        body {
            background-color: var(--bg);
            color: var(--text);
            font-family: 'Noto Sans SC', 'Inter', sans-serif;
            font-weight: 400;
            line-height: 1.7;
            background-image: radial-gradient(rgba(234, 179, 8, 0.02) 1px, transparent 1px);
            background-size: 8px 8px; /* 细微噪点纹理 */
        }

        h1, h2, h3, h4, .serif-display {
            font-family: 'Noto Serif SC', 'Inter', serif;
            font-weight: 700;
        }

        /* 导航栏吸顶 + 背景透明度变化 */
        .navbar-custom {
            background: rgba(24, 24, 27, 0.75) !important;
            backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
            transition: background 0.3s ease, box-shadow 0.2s;
        }
        .navbar-custom.scrolled {
            background: rgba(24, 24, 27, 0.92) !important;
            border-bottom: 1px solid var(--primary);
        }

        .navbar-brand {
            font-weight: 800;
            letter-spacing: -0.5px;
            font-size: 1.6rem;
            color: var(--primary) !important;
            display: flex;
            align-items: center;
        }
        .navbar-brand i {
            margin-right: 8px;
            color: var(--accent);
        }

        .nav-link-custom {
            color: var(--text) !important;
            font-weight: 500;
            margin: 0 0.7rem;
            border-bottom: 2px solid transparent;
            transition: 0.2s;
        }
        .nav-link-custom:hover {
            border-bottom-color: var(--primary);
            color: var(--primary) !important;
        }

        /* Hero 大数字 */
        .hero-section {
            padding: 4rem 0 3rem;
            border-bottom: 1px solid var(--border);
        }
        .hero-stats {
            font-family: 'Noto Serif SC', serif;
            font-weight: 900;
            font-size: 5.5rem;
            line-height: 1.1;
            color: var(--primary);
            letter-spacing: -2px;
        }
        .hero-stats span {
            font-size: 1.8rem;
            font-weight: 400;
            color: var(--text);
            margin-left: 8px;
            letter-spacing: 0;
        }

        /* 对比表格 */
        .compare-table {
            width: 100%;
            border-collapse: collapse;
        }
        .compare-table th, .compare-table td {
            border: 1px solid var(--border);
            padding: 1rem 1.2rem;
            text-align: center;
            background-color: var(--card-bg);
        }
        .compare-table th {
            background: #202024;
            font-weight: 600;
            color: var(--primary);
        }
        .compare-table .highlight-col {
            border: 1px solid var(--primary);
        }

        /* 特色卡片 (三栏网格) */
        .feature-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 0; /* 极简无阴影 */
            padding: 2rem 1.5rem;
            transition: transform 0.25s ease, border-color 0.25s ease;
            height: 100%;
        }
        .feature-card:hover {
            transform: scale(1.02);
            border-color: var(--primary);
        }
        .feature-icon {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 1rem;
        }

        /* 手风琴 (介绍区) */
        .accordion-item {
            background: transparent;
            border: 1px solid var(--border);
            border-radius: 0;
            margin-bottom: 12px;
        }
        .accordion-button {
            background: var(--card-bg);
            color: var(--text);
            font-family: 'Noto Sans SC', sans-serif;
            font-weight: 500;
            border: none;
            box-shadow: none;
            padding: 1.2rem 1rem;
        }
        .accordion-button:not(.collapsed) {
            background: var(--card-bg);
            color: var(--primary);
        }
        .accordion-button:focus {
            box-shadow: none;
        }
        .accordion-body {
            background: var(--card-bg);
            color: #d4d4d8;
        }

        /* CTA 区块 */
        .cta-box {
            border: 2px solid var(--primary);
            padding: 2.5rem;
            background: #1a1a1e;
        }

        /* 卡片错落渐显动画 */
        .reveal-group .feature-card {
            opacity: 0;
            transform: translateY(30px);
            animation: fadeUp 0.7s forwards;
        }
        .reveal-group .feature-card:nth-child(1) { animation-delay: 0.1s; }
        .reveal-group .feature-card:nth-child(2) { animation-delay: 0.3s; }
        .reveal-group .feature-card:nth-child(3) { animation-delay: 0.5s; }

        @keyframes fadeUp {
            to { opacity: 1; transform: translateY(0); }
        }

        /* 通用区块标题 */
        .section-title {
            border-left: 6px solid var(--primary);
            padding-left: 1rem;
            font-weight: 800;
            margin-bottom: 1.2rem;
            font-size: 2rem;
        }

        footer {
            border-top: 1px solid var(--border);
        }

        .friend-links a {
            color: var(--accent);
            text-decoration: underline;
            margin: 0 0.5rem;
        }

        /* 移动端折叠按钮 */
        .navbar-toggler {
            border-color: var(--border);
        }
        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%23eab308' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e") !important;
        }

        @media (max-width: 768px) {
            .hero-stats { font-size: 3.8rem; }
            .compare-table { font-size: 0.85rem; }
        }

/* --- 子页面追加 --- */
/* 确保 Bootstrap 组件颜色与站点一致 */
        .card, .card-body, .card-header, .card-footer,
        .accordion-item, .accordion-button, .accordion-body,
        .list-group-item, .modal-content, .modal-header, .modal-body,
        .form-control, .form-select, .form-label, .input-group-text,
        .dropdown-menu, .dropdown-item, .nav-link, .navbar, .navbar-brand,
        .btn-light, .btn-outline-* {
            background-color: var(--card-bg) !important;
            color: var(--text) !important;
            border-color: var(--border) !important;
        }
.form-control::placeholder {
            color: rgba(255, 255, 255, 0.4) !important;
        }
/* 覆盖导航栏高亮 */
        .navbar-custom .nav-link-custom.active,
        .navbar-custom .nav-link-custom:hover {
            color: var(--primary) !important;
        }
/* 本页专用微调 */
        .about-hero {
            background: linear-gradient(145deg, rgba(234,179,8,0.08) 0%, rgba(24,24,27,1) 100%);
            border-bottom: 1px solid var(--border);
        }

/* --- 子页面追加 --- */
.disclaimer-hero {
            padding: 3rem 0 2rem;
            border-bottom: 1px solid var(--border);
            margin-bottom: 2.5rem;
        }
.disclaimer-hero h1 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 0.8rem;
        }
.disclaimer-hero .subtitle {
            color: var(--primary);
            font-weight: 500;
            letter-spacing: 0.5px;
        }
.disclaimer-section {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 1.8rem 2rem;
            margin-bottom: 1.8rem;
            transition: border-color 0.3s ease;
        }
.disclaimer-section:hover {
            border-color: rgba(234, 179, 8, 0.4);
        }
.disclaimer-section h2 {
            color: var(--primary);
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
.disclaimer-section h2 i {
            font-size: 1.1rem;
        }
.disclaimer-section p {
            color: rgba(250, 250, 250, 0.85);
            line-height: 1.8;
            margin-bottom: 0.8rem;
            font-size: 0.95rem;
        }
.disclaimer-section ul {
            padding-left: 1.2rem;
            margin-bottom: 0.8rem;
        }
.disclaimer-section ul li {
            color: rgba(250, 250, 250, 0.8);
            line-height: 1.8;
            font-size: 0.95rem;
            margin-bottom: 0.3rem;
        }
.highlight-box {
            background: rgba(234, 179, 8, 0.08);
            border-left: 4px solid var(--primary);
            padding: 1rem 1.5rem;
            border-radius: 0 8px 8px 0;
            margin: 1.2rem 0;
        }
.highlight-box p {
            margin-bottom: 0;
            font-weight: 500;
            color: var(--text);
        }
.update-date {
            color: rgba(250, 250, 250, 0.6);
            font-size: 0.9rem;
            text-align: right;
            margin-top: 2rem;
            padding-top: 1rem;
            border-top: 1px solid var(--border);
        }
.disclaimer-hero h1 {
                font-size: 1.6rem;
            }
.disclaimer-section {
                padding: 1.3rem 1.2rem;
            }
.disclaimer-section h2 {
                font-size: 1.1rem;
            }

/* --- 子页面追加 --- */
.privacy-hero {
            background: linear-gradient(135deg, rgba(232, 179, 8, 0.1) 0%, rgba(245, 158, 11, 0.05) 100%);
            border-bottom: 1px solid var(--border);
            padding: 80px 0 60px;
            text-align: center;
        }
.privacy-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 20px;
        }
.privacy-hero p {
            font-size: 1.2rem;
            color: var(--text);
            opacity: 0.9;
            max-width: 800px;
            margin: 0 auto;
        }
.privacy-content {
            padding: 60px 0 80px;
        }
.privacy-section {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 40px;
            margin-bottom: 30px;
        }
.privacy-section h2 {
            color: var(--primary);
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 20px;
            position: relative;
            padding-left: 20px;
        }
.privacy-section h2::before {
            content: '';
            position: absolute;
            left: 0;
            top: 8px;
            width: 4px;
            height: 24px;
            background: var(--primary);
            border-radius: 2px;
        }
.privacy-section h3 {
            color: var(--text);
            font-size: 1.3rem;
            font-weight: 600;
            margin: 25px 0 15px;
        }
.privacy-section p {
            color: var(--text);
            opacity: 0.9;
            line-height: 1.8;
            margin-bottom: 15px;
        }
.privacy-section ul {
            list-style: none;
            padding: 0;
        }
.privacy-section ul li {
            color: var(--text);
            opacity: 0.9;
            padding-left: 24px;
            position: relative;
            margin-bottom: 10px;
            line-height: 1.8;
        }
.privacy-section ul li::before {
            content: '▸';
            position: absolute;
            left: 0;
            color: var(--primary);
            font-size: 1.2rem;
        }
.privacy-badge {
            display: inline-block;
            background: rgba(232, 179, 8, 0.15);
            color: var(--primary);
            border: 1px solid rgba(232, 179, 8, 0.3);
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 500;
            margin-bottom: 15px;
        }
.contact-info {
            background: rgba(232, 179, 8, 0.05);
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 20px;
            margin-top: 20px;
        }
.privacy-hero h1 {
                font-size: 2rem;
            }
.privacy-section {
                padding: 25px;
            }
.privacy-section h2 {
                font-size: 1.5rem;
            }

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