/* 深夜石板配色 & 极简长卷 */
        :root {
            --primary: #38bdf8;
            --accent: #a78bfa;
            --bg: #0f172a;
            --text: #e2e8f0;
            --card-bg: #1e293b;
            --border-light: #334155;
            --radius-card: 1.25rem;
            --radius-pill: 50rem;
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body {
            background-color: var(--bg);
            color: var(--text);
            font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            font-weight: 400;
            line-height: 1.7;
            scroll-behavior: smooth;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5 { font-weight: 800; letter-spacing: -0.02em; color: #f8fafc; }
        .text-primary-custom { color: var(--primary) !important; }
        .text-accent-custom { color: var(--accent) !important; }

        /* 背景几何色块装饰 */
        .geo-bg {
            position: fixed;
            top: 0; left: 0;
            width: 100%; height: 100%;
            z-index: -1;
            pointer-events: none;
            overflow: hidden;
        }
        .geo-shape {
            position: absolute;
            border-radius: 30%;
            opacity: 0.1;
        }
        .geo-circle { border-radius: 50%; background: var(--primary); width: 300px; height: 300px; top: 10%; left: -80px; }
        .geo-square { background: var(--accent); width: 180px; height: 180px; bottom: 5%; right: 5%; border-radius: 20px; transform: rotate(15deg); }
        .geo-triangle {
            width: 0; height: 0;
            border-left: 90px solid transparent;
            border-right: 90px solid transparent;
            border-bottom: 150px solid var(--primary);
            background: transparent;
            top: 55%; left: 70%;
            opacity: 0.06;
            border-radius: 0;
        }
        .geo-dot { background: var(--accent); width: 20px; height: 20px; top: 20%; right: 15%; border-radius: 50%; opacity: 0.3; }

        /* 导航栏 */
        .navbar-cloud {
            background-color: rgba(15, 23, 42, 0.75);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(51, 65, 85, 0.4);
            padding: 0.9rem 0;
        }
        .navbar-cloud .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: #f8fafc;
            letter-spacing: -0.02em;
        }
        .navbar-cloud .navbar-brand i {
            color: var(--primary);
            margin-right: 6px;
            font-size: 1.6rem;
        }
        .navbar-cloud .nav-link {
            color: rgba(226, 232, 240, 0.85);
            font-weight: 500;
            margin: 0 0.4rem;
            padding: 0.5rem 1rem;
            border-radius: var(--radius-pill);
            transition: 0.2s;
        }
        .navbar-cloud .nav-link:hover {
            color: #fff;
            background: rgba(56, 189, 248, 0.08);
        }
        .navbar-toggler {
            border: 1px solid var(--border-light);
            color: var(--text);
        }

        /* 通用胶囊按钮 */
        .btn-pill {
            border-radius: var(--radius-pill);
            padding: 0.7rem 1.8rem;
            font-weight: 600;
            border: none;
            transition: all 0.2s;
        }
        .btn-primary-glow {
            background: var(--primary);
            color: #0f172a;
            box-shadow: 0 4px 20px rgba(56, 189, 248, 0.25);
        }
        .btn-primary-glow:hover {
            background: #7dd3fc;
            color: #0f172a;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(56, 189, 248, 0.4);
        }
        .btn-outline-light-pill {
            border: 1px solid var(--border-light);
            color: var(--text);
            background: transparent;
        }
        .btn-outline-light-pill:hover {
            border-color: var(--accent);
            color: #fff;
            background: rgba(167, 139, 250, 0.1);
        }

        /* Hero 区域 */
        .hero-section {
            padding: 7rem 0 4rem 0;
            text-align: center;
        }
        .hero-title {
            font-size: calc(2.8rem + 1.8vw);
            font-weight: 900;
            line-height: 1.1;
            max-width: 800px;
            margin: 0 auto 1.2rem;
            letter-spacing: -0.03em;
        }
        .hero-sub {
            font-size: 1.3rem;
            color: #94a3b8;
            max-width: 600px;
            margin: 0 auto 2.5rem;
            font-weight: 400;
        }
        .hero-btns .btn { margin: 0 0.5rem 0.5rem; }

        /* 卡片通用 */
        .card-soft {
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            box-shadow: 0 8px 24px rgba(0,0,0,0.2);
            transition: 0.2s ease;
        }
        .card-soft:hover {
            border-color: var(--primary);
            box-shadow: 0 12px 32px rgba(56, 189, 248, 0.1);
        }

        /* 编号清单 */
        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: #0f172a;
            font-weight: 800;
            width: 2.2rem;
            height: 2.2rem;
            border-radius: 50%;
            margin-right: 0.7rem;
            font-size: 1.1rem;
        }

        /* 对比表格 */
        .compare-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0 10px;
        }
        .compare-table th, .compare-table td {
            background: var(--card-bg);
            padding: 1.2rem 1.2rem;
            text-align: center;
        }
        .compare-table th:first-child { border-radius: 20px 0 0 20px; }
        .compare-table th:last-child { border-radius: 0 20px 20px 0; }
        .compare-table td:first-child { border-radius: 20px 0 0 20px; font-weight: 600; text-align: left; }
        .compare-table td:last-child { border-radius: 0 20px 20px 0; }
        .compare-table .fa-check { color: var(--primary); }
        .compare-table .fa-xmark { color: #64748b; }

        /* FAQ */
        .accordion-item-custom {
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: 30px !important;
            margin-bottom: 12px;
            overflow: hidden;
        }
        .accordion-button-custom {
            background: transparent;
            color: var(--text);
            font-weight: 600;
            padding: 1.2rem 1.5rem;
            border: none;
            width: 100%;
            text-align: left;
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-radius: 30px;
        }
        .accordion-button-custom i { transition: 0.2s; }
        .accordion-button-custom[aria-expanded="true"] i { transform: rotate(45deg); }

        /* 特色网格 */
        .feature-icon {
            background: rgba(56, 189, 248, 0.1);
            width: 70px;
            height: 70px;
            border-radius: 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 1rem;
        }

        /* 数字滚动效果 (初始0) */
        .count-up {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--primary);
            display: inline-block;
        }

        /* 懒加载图片占位渐显 */
        img.lazy-placeholder {
            background: linear-gradient(135deg, #1e293b 0%, #2d3a52 100%);
            width: 100%;
            height: auto;
            display: block;
            opacity: 0;
            transition: opacity 0.5s ease;
        }
        img.lazy-placeholder.loaded {
            opacity: 1;
        }

        /* hover播放按钮 (海报) */
        .poster-hover {
            position: relative;
            border-radius: 20px;
            overflow: hidden;
        }
        .play-btn-overlay {
            position: absolute;
            top: 0; left: 0;
            width: 100%; height: 100%;
            background: rgba(15, 23, 42, 0.4);
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            transition: opacity 0.25s;
            color: #fff;
            font-size: 3.5rem;
        }
        .poster-hover:hover .play-btn-overlay {
            opacity: 1;
        }

        /* 底部友链 */
        .friend-links {
            border-top: 1px solid var(--border-light);
            margin-top: 3rem;
            padding: 2rem 0 1rem;
        }
        .friend-links a {
            color: #94a3b8;
            margin: 0 0.8rem;
            text-decoration: none;
            font-weight: 400;
        }
        .friend-links a:hover { color: var(--primary); }

        footer {
            padding: 1.5rem 0 2rem;
            color: #94a3b8;
        }

        /* 通用布局 */
        .section-padding { padding: 5rem 0; }
        .max-width-800 { max-width: 800px; margin-left: auto; margin-right: auto; }
        .container-narrow { max-width: 900px; margin: 0 auto; }
        .text-muted-soft { color: #94a3b8; }

        @media (max-width: 768px) {
            .hero-title { font-size: 2.4rem; }
        }

/* --- 子页面追加 --- */
.about-hero { padding: 6rem 0 3rem; position: relative; }
.about-hero .hero-title { font-size: 2.8rem; font-weight: 900; margin-bottom: 1rem; }
.about-hero .hero-sub { font-size: 1.1rem; opacity: .75; max-width: 700px; margin: 0 auto; }
.about-section { padding: 4rem 0; }
.about-section-alt { background: rgba(30, 41, 59, .35); }
.about-card { background: var(--card-bg); border: 1px solid var(--border-light); border-radius: var(--radius-card); padding: 2rem; height: 100%; transition: transform .3s ease, border-color .3s ease; }
.about-card:hover { transform: translateY(-4px); border-color: var(--primary); }
.about-card .feature-icon { width: 52px; height: 52px; border-radius: 14px; background: rgba(56, 189, 248, .12); display: flex; align-items: center; justify-content: center; font-size: 1.4rem; color: var(--primary); margin-bottom: 1.2rem; }
.about-card h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: .8rem; color: var(--text); }
.about-card p { font-size: .95rem; line-height: 1.7; opacity: .78; }
.about-quote { font-size: 1.2rem; line-height: 1.9; opacity: .85; border-left: 4px solid var(--primary); padding-left: 1.5rem; margin: 2.5rem 0; font-style: italic; }
.about-quote strong { color: var(--primary); font-style: normal; }
.about-list { list-style: none; padding: 0; margin: 1.5rem 0 0; }
.about-list li { padding: .5rem 0; display: flex; align-items: flex-start; gap: .75rem; font-size: .95rem; opacity: .82; }
.about-list li i { color: var(--primary); margin-top: .2rem; font-size: .9rem; }
.about-number { font-size: 2.2rem; font-weight: 900; color: var(--primary); line-height: 1; margin-bottom: .5rem; }
.about-number-label { font-size: .9rem; opacity: .7; }
.about-img-wrap { border-radius: var(--radius-card); overflow: hidden; position: relative; }
.about-img-wrap img { width: 100%; height: auto; display: block; }
.about-img-caption { position: absolute; bottom: 0; left: 0; right: 0; padding: 2rem 1.5rem 1rem; background: linear-gradient(to top, rgba(15, 23, 42, .9), transparent); font-size: .85rem; opacity: .8; }
.about-faq { max-width: 800px; margin: 0 auto; }
.about-faq-item { background: var(--card-bg); border: 1px solid var(--border-light); border-radius: 1rem; padding: 1.5rem 1.75rem; margin-bottom: 1rem; }
.about-faq-item h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: .5rem; color: var(--primary); }
.about-faq-item p { font-size: .95rem; line-height: 1.7; opacity: .8; margin: 0; }
.about-cta { background: linear-gradient(135deg, rgba(56, 189, 248, .12), rgba(167, 139, 250, .12)); border: 1px solid var(--border-light); border-radius: var(--radius-card); padding: 3rem 2rem; text-align: center; }
.about-cta h2 { font-size: 1.8rem; font-weight: 800; margin-bottom: 1rem; }
.about-cta p { opacity: .8; max-width: 600px; margin: 0 auto 2rem; }
.about-hero .hero-title { font-size: 2rem; }
.about-hero { padding: 4rem 0 2rem; }
.about-section { padding: 3rem 0; }

/* --- 子页面追加 --- */
/* 确保 Bootstrap 组件不会破坏暗色风格 —— 仅补充必要覆盖 */
        .privacy-article {
            background: transparent;
            color: var(--text);
        }
.privacy-article h2, 
        .privacy-article h3 {
            color: var(--primary);
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-top: 2.5rem;
            margin-bottom: 1rem;
        }
.privacy-article h2 i, 
        .privacy-article h3 i {
            color: var(--accent);
            margin-right: 0.5rem;
        }
.privacy-article p, 
        .privacy-article li {
            color: rgba(226, 232, 240, 0.85);
            line-height: 1.8;
        }
.privacy-article strong {
            color: var(--text);
            font-weight: 600;
        }
.privacy-card {
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 1.75rem 2rem;
            transition: transform .2s ease, box-shadow .2s ease;
            height: 100%;
        }
.privacy-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 30px rgba(56, 189, 248, 0.08);
        }
.privacy-card i {
            color: var(--primary);
            font-size: 1.8rem;
            margin-bottom: 1rem;
        }
.privacy-card h4 {
            color: var(--text);
            font-weight: 600;
            font-size: 1.1rem;
            margin-bottom: 0.5rem;
        }
.privacy-card p {
            font-size: 0.95rem;
            margin-bottom: 0;
        }
.section-divider {
            border-top: 1px dashed var(--border-light);
            margin: 3rem 0;
            opacity: .6;
        }
.breadcrumb-cloud {
            background: transparent;
            padding: 0.75rem 0;
            margin-bottom: 1rem;
        }
.breadcrumb-cloud a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 500;
            transition: color .15s;
        }
.breadcrumb-cloud a:hover {
            color: var(--accent);
        }
.breadcrumb-cloud .separator {
            color: var(--border-light);
            margin: 0 0.5rem;
        }
.list-checked {
            list-style: none;
            padding-left: 0;
        }
.list-checked li {
            position: relative;
            padding-left: 1.8rem;
            margin-bottom: 0.6rem;
        }
.list-checked li::before {
            content: "\f058";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            color: var(--accent);
            position: absolute;
            left: 0;
            top: 0.2rem;
            font-size: 0.9rem;
        }
/* 导航栏激活状态 (隐私) */
        .navbar-cloud .nav-link.active-privacy {
            color: var(--primary) !important;
            font-weight: 600;
            text-shadow: 0 0 8px rgba(56,189,248,.3);
        }
/* 卡片内小标签 */
        .badge-cloud {
            background: rgba(167, 139, 250, 0.15);
            color: var(--accent);
            border: 1px solid rgba(167, 139, 250, 0.25);
            border-radius: var(--radius-pill);
            padding: 0.25rem 0.75rem;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            display: inline-block;
        }
.last-updated {
            color: var(--border-light);
            font-size: 0.9rem;
            border-left: 3px solid var(--primary);
            padding-left: 1rem;
            margin: 2rem 0 1.5rem;
        }