/* 全局变量：深夜石板配色 */
        :root {
            --bg-primary: #0f172a;
            --text-primary: #e2e8f0;
            --accent-main: #38bdf8;
            --accent-soft: #a78bfa;
            --border-color: #334155;
            --card-bg: #1e293b;
        }

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

        body {
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            line-height: 1.6;
            letter-spacing: 0.2px;
            overflow-x: hidden;
        }

        /* 细微噪点纹理 */
        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='0.2'/%3E%3C/svg%3E");
        }

        /* 导航栏吸顶 + 背景透明变化 */
        .navbar-custom {
            background-color: rgba(15, 23, 42, 0.6);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            transition: background-color 0.3s ease, box-shadow 0.3s;
            z-index: 1000;
            padding: 12px 0;
        }

        .navbar-custom.scrolled {
            background-color: rgba(15, 23, 42, 0.92);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .navbar-brand {
            font-weight: 800;
            font-size: 1.7rem;
            color: var(--text-primary) !important;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: color 0.2s;
        }

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

        .nav-link-custom {
            color: var(--text-primary) !important;
            font-weight: 500;
            margin: 0 12px;
            padding: 6px 0;
            border-bottom: 2px solid transparent;
            transition: border-color 0.2s, color 0.2s;
        }

        .nav-link-custom:hover {
            color: var(--accent-main) !important;
            border-bottom-color: var(--accent-main);
        }

        /* 滚动进度条 */
        .progress-container {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: transparent;
            z-index: 2000;
        }

        .progress-bar-fill {
            display: block;
            height: 3px;
            width: 0%;
            background: linear-gradient(90deg, var(--accent-main), var(--accent-soft));
            box-shadow: 0 0 8px var(--accent-main);
            transition: width 0.1s ease-out;
        }

        /* Hero 区域 */
        .hero-section {
            min-height: 92vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 80px 20px 40px;
            position: relative;
            border-bottom: 1px solid var(--border-color);
            background: radial-gradient(circle at 30% 30%, rgba(56, 189, 248, 0.12) 0%, transparent 60%),
                        radial-gradient(circle at 70% 70%, rgba(167, 139, 250, 0.08) 0%, transparent 50%);
        }

        .hero-title {
            font-family: 'Inter', sans-serif;
            font-weight: 900;
            font-size: clamp(2.5rem, 8vw, 5.5rem);
            line-height: 1.1;
            background: linear-gradient(135deg, var(--accent-main) 0%, var(--accent-soft) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            margin-bottom: 20px;
            letter-spacing: -0.02em;
        }

        .hero-sub {
            font-size: 1.3rem;
            color: #94a3b8;
            max-width: 700px;
            margin: 0 auto 40px;
            font-weight: 300;
        }

        .hero-btn {
            border: 1.5px solid var(--accent-main);
            color: var(--accent-main);
            background: transparent;
            padding: 14px 42px;
            font-weight: 600;
            border-radius: 60px;
            text-decoration: none;
            letter-spacing: 1px;
            transition: all 0.3s;
            position: relative;
            overflow: hidden;
            display: inline-block;
        }

        .hero-btn::after {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(100deg, transparent, rgba(255, 255, 255, 0.25), transparent);
            transition: left 0.5s;
        }

        .hero-btn:hover {
            background-color: var(--accent-main);
            color: #0f172a;
            box-shadow: 0 0 25px rgba(56, 189, 248, 0.3);
        }

        .hero-btn:hover::after {
            left: 100%;
        }

        /* 浮动装饰元素 */
        .float-icon {
            position: absolute;
            font-size: 2.2rem;
            color: var(--accent-soft);
            opacity: 0.3;
            animation: float 6s ease-in-out infinite;
        }

        .float-icon:nth-of-type(1) { top: 15%; left: 8%; }
        .float-icon:nth-of-type(2) { bottom: 25%; right: 10%; animation-delay: 2s; color: var(--accent-main); }
        .float-icon:nth-of-type(3) { top: 30%; right: 15%; animation-delay: 4s; }

        @keyframes float {
            0% { transform: translateY(0); }
            50% { transform: translateY(-20px); }
            100% { transform: translateY(0); }
        }

        /* 区块样式 */
        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 40px;
            border-left: 6px solid var(--accent-main);
            padding-left: 20px;
        }

        .section-sub {
            color: #94a3b8;
            margin-bottom: 30px;
            font-weight: 400;
        }

        /* 卡片网格（三栏） */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .card-custom {
            background: transparent;
            border: 1px solid var(--border-color);
            border-radius: 0px;
            padding: 28px 20px;
            transition: border-color 0.2s, transform 0.2s;
            backdrop-filter: blur(5px);
        }

        .card-custom:hover {
            border-color: var(--accent-main);
            transform: translateY(-6px);
        }

        .card-custom i {
            font-size: 2rem;
            color: var(--accent-main);
            margin-bottom: 20px;
        }

        .card-custom h5 {
            font-weight: 700;
            font-size: 1.4rem;
            margin-bottom: 12px;
        }

        .card-custom p {
            color: #b0c4de;
            font-size: 0.95rem;
        }

        /* 对比表格 */
        .table-compare {
            width: 100%;
            border-collapse: collapse;
            border: 1px solid var(--border-color);
        }

        .table-compare th, .table-compare td {
            padding: 18px 16px;
            border-bottom: 1px solid var(--border-color);
            text-align: center;
        }

        .table-compare th {
            background-color: #1e293b;
            color: var(--accent-main);
            font-weight: 700;
            font-size: 1.1rem;
        }

        .table-compare td:first-child {
            font-weight: 600;
            color: var(--text-primary);
        }

        .table-compare .fa-check { color: var(--accent-main); }
        .table-compare .fa-xmark { color: #ef4444; }

        /* FAQ折叠 */
        .faq-item {
            background: transparent;
            border: 1px solid var(--border-color);
            border-radius: 0px;
            margin-bottom: 18px;
            overflow: hidden;
        }

        .faq-question {
            padding: 18px 22px;
            font-weight: 600;
            font-size: 1.1rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: background 0.2s;
        }

        .faq-question:hover {
            background: rgba(56, 189, 248, 0.08);
        }

        .faq-answer {
            padding: 0 22px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
            color: #aab9ce;
        }

        .faq-item.active .faq-answer {
            padding: 0 22px 18px;
            max-height: 150px;
        }

        /* 编号清单 */
        .steps-list {
            list-style: none;
            counter-reset: step-counter;
        }

        .steps-list li {
            counter-increment: step-counter;
            padding: 18px 0 18px 50px;
            position: relative;
            border-bottom: 1px dashed var(--border-color);
            font-weight: 500;
        }

        .steps-list li::before {
            content: counter(step-counter);
            position: absolute;
            left: 0;
            top: 18px;
            width: 32px;
            height: 32px;
            background-color: var(--accent-main);
            color: #0f172a;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1rem;
        }

        /* CTA */
        .cta-section {
            border: 1px solid var(--accent-soft);
            background: rgba(167, 139, 250, 0.05);
            padding: 60px 20px;
            text-align: center;
        }

        .cta-title {
            font-size: 2.5rem;
            font-weight: 900;
        }

        /* 页脚 */
        .footer {
            border-top: 1px solid var(--border-color);
            padding: 40px 20px 20px;
            background-color: rgba(15, 23, 42, 0.8);
        }

        .friend-links {
            border: 1px solid var(--border-color);
            padding: 25px 20px;
            margin: 40px 0 20px;
        }

        .friend-links a {
            color: var(--accent-main);
            text-decoration: none;
        }

        @media (max-width: 992px) {
            .card-grid {
                grid-template-columns: 1fr;
            }
            .hero-title {
                font-size: 3.2rem;
            }
        }

        @media (max-width: 768px) {
            .navbar-brand { font-size: 1.2rem; }
            .section-title { font-size: 1.8rem; }
        }

/* --- 子页面追加 --- */
.ranking-hero {
            background: linear-gradient(135deg, rgba(56,189,248,0.15) 0%, rgba(167,139,250,0.1) 100%);
            border-bottom: 1px solid var(--border-color);
        }
.ranking-list {
            counter-reset: rank;
        }
.rank-item {
            display: flex;
            align-items: center;
            gap: 1.5rem;
            padding: 1.25rem 1.5rem;
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            margin-bottom: 1rem;
            transition: all 0.3s ease;
            position: relative;
            counter-increment: rank;
        }
.rank-item:hover {
            transform: translateX(8px);
            border-color: var(--accent-main);
            box-shadow: 0 4px 20px rgba(56,189,248,0.1);
        }
.rank-number {
            font-size: 2rem;
            font-weight: 900;
            color: var(--accent-main);
            min-width: 60px;
            text-align: center;
            font-style: italic;
        }
.rank-item:nth-child(1) .rank-number,
        .rank-item:nth-child(2) .rank-number,
        .rank-item:nth-child(3) .rank-number {
            color: #fbbf24;
        }
.rank-thumb {
            width: 80px;
            height: 110px;
            border-radius: 8px;
            overflow: hidden;
            flex-shrink: 0;
            background: var(--bg-primary);
        }
.rank-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
.rank-info {
            flex: 1;
        }
.rank-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.25rem;
        }
.rank-meta {
            font-size: 0.85rem;
            color: rgba(226,232,240,0.7);
            margin-bottom: 0.5rem;
        }
.rank-tags {
            display: flex;
            gap: 0.5rem;
            flex-wrap: wrap;
        }
.rank-tag {
            font-size: 0.75rem;
            padding: 2px 10px;
            background: rgba(56,189,248,0.1);
            border: 1px solid rgba(56,189,248,0.3);
            color: var(--accent-main);
            border-radius: 20px;
        }
.rank-score {
            text-align: right;
            min-width: 80px;
        }
.rank-score-value {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--accent-soft);
        }
.rank-trend {
            font-size: 0.85rem;
            color: #4ade80;
        }
.rank-trend.down {
            color: #f87171;
        }
.tab-btn {
            background: transparent;
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            padding: 0.6rem 1.8rem;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all 0.3s ease;
            cursor: pointer;
        }
.tab-btn:hover, .tab-btn.active {
            background: var(--accent-main);
            border-color: var(--accent-main);
            color: #fff;
        }
.rank-item {
                flex-wrap: wrap;
                gap: 1rem;
            }
.rank-number {
                min-width: 40px;
                font-size: 1.5rem;
            }
.rank-score {
                min-width: 100%;
                text-align: left;
            }
.rank-thumb {
                width: 60px;
                height: 85px;
            }

/* --- 子页面追加 --- */
/* 覆盖 Bootstrap 可能带来的白底黑字 —— 与首页深色风格统一 */
        .card, .card-body, .card-header, .card-footer,
        .list-group-item, .accordion-item, .accordion-button, .accordion-body,
        .form-control, .form-select, .modal-content {
            background: var(--card-bg) !important;
            color: var(--text-primary) !important;
            border-color: var(--border-color) !important;
        }
.form-control::placeholder {
            color: rgba(226, 232, 240, 0.5);
        }
.accordion-button:not(.collapsed) {
            background: rgba(56, 189, 248, 0.1);
            color: var(--accent-main);
        }
.accordion-button::after {
            filter: invert(1);
        }
.navbar, .navbar-brand, .nav-link-custom {
            background-color: transparent !important;
        }
.navbar {
            background: var(--bg-primary) !important;
            border-bottom: 1px solid var(--border-color);
        }
.nav-link-custom.active,
        .nav-link-custom:hover {
            color: var(--accent-main) !important;
        }
/* 高亮当前页导航项 */
        .navbar-nav .nav-link-custom[href="/bookmarks.html"] {
            color: var(--accent-main) !important;
            font-weight: 600;
        }
/* 订阅卡片悬浮效果 */
        .sub-card {
            transition: transform .2s ease, box-shadow .2s ease;
            border: 1px solid var(--border-color);
            background: var(--card-bg);
        }
.sub-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
            border-color: var(--accent-main);
        }
.sub-card .card-img-top {
            background: rgba(56, 189, 248, 0.1);
        }
.badge-soft {
            background: rgba(167, 139, 250, 0.2);
            color: var(--accent-soft);
            font-weight: 500;
        }
.btn-accent {
            background: var(--accent-main);
            color: #0f172a;
            font-weight: 600;
            border: none;
        }
.btn-accent:hover {
            background: #0ea5e9;
            color: #0f172a;
        }
.empty-state i {
            color: var(--border-color);
        }

/* --- 子页面追加 --- */
/* 本页专属微调,不覆盖站点全局样式 */
        .about-hero {
            padding: 80px 0 60px;
            background: linear-gradient(135deg, rgba(56, 189, 248, 0.08) 0%, rgba(167, 139, 250, 0.06) 100%);
            border-bottom: 1px solid var(--border-color);
        }
.about-section {
            padding: 60px 0;
        }
.about-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 32px;
            height: 100%;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
.about-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 24px rgba(0,0,0,0.3);
        }
.about-card i {
            font-size: 2.2rem;
            color: var(--accent-main);
            margin-bottom: 16px;
        }
.about-card h3 {
            color: var(--text-primary);
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
.about-card p {
            color: var(--text-primary);
            opacity: 0.85;
            line-height: 1.7;
            font-size: 0.95rem;
        }
.milestone-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
.milestone-list li {
            padding: 16px 0;
            border-bottom: 1px solid var(--border-color);
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }
.milestone-list li:last-child {
            border-bottom: none;
        }
.milestone-year {
            min-width: 64px;
            font-weight: 800;
            color: var(--accent-main);
            font-size: 1.1rem;
        }
.milestone-text {
            color: var(--text-primary);
            opacity: 0.85;
            line-height: 1.6;
        }
.value-item {
            text-align: center;
            padding: 24px 16px;
        }
.value-item i {
            font-size: 2rem;
            color: var(--accent-soft);
            margin-bottom: 12px;
        }
.value-item h4 {
            color: var(--text-primary);
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 8px;
        }
.value-item p {
            color: var(--text-primary);
            opacity: 0.8;
            font-size: 0.9rem;
        }
.join-cta {
            background: linear-gradient(135deg, rgba(56, 189, 248, 0.1) 0%, rgba(167, 139, 250, 0.08) 100%);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 48px 32px;
            text-align: center;
        }
.join-cta h2 {
            color: var(--text-primary);
            font-weight: 800;
            margin-bottom: 16px;
        }
.join-cta p {
            color: var(--text-primary);
            opacity: 0.85;
            max-width: 600px;
            margin: 0 auto 24px;
        }

/* --- 子页面追加 --- */
.disclaimer-section {
            padding: 3rem 0;
            max-width: 900px;
            margin: 0 auto;
        }
.disclaimer-section .section-title {
            color: var(--accent-main);
            margin-bottom: 1.5rem;
            font-weight: 700;
        }
.disclaimer-block {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 2rem;
            margin-bottom: 2rem;
            transition: border-color 0.3s ease;
        }
.disclaimer-block:hover {
            border-color: var(--accent-main);
        }
.disclaimer-block h2 {
            color: var(--accent-main);
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 1.2rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
.disclaimer-block h2 i {
            color: var(--accent-soft);
            font-size: 1.3rem;
        }
.disclaimer-block p {
            color: var(--text-primary);
            line-height: 1.8;
            margin-bottom: 1rem;
            font-size: 0.95rem;
        }
.disclaimer-block ul {
            padding-left: 1.5rem;
            margin-bottom: 1rem;
        }
.disclaimer-block ul li {
            color: var(--text-primary);
            line-height: 1.8;
            font-size: 0.95rem;
            margin-bottom: 0.5rem;
        }
.highlight-text {
            color: var(--accent-main);
            font-weight: 600;
        }
.note-box {
            background: rgba(56, 189, 248, 0.08);
            border-left: 4px solid var(--accent-main);
            padding: 1rem 1.5rem;
            border-radius: 0 8px 8px 0;
            margin: 1.5rem 0;
        }
.note-box p {
            margin-bottom: 0.5rem;
        }
.last-update {
            color: var(--accent-soft);
            font-size: 0.85rem;
            text-align: right;
            margin-top: 2rem;
            font-style: italic;
        }
.hero-section.disclaimer-hero {
            padding: 3rem 0 2rem;
            text-align: center;
        }
.hero-section.disclaimer-hero .hero-title {
            font-size: 2.2rem;
            margin-bottom: 1rem;
        }
.hero-section.disclaimer-hero .hero-sub {
            font-size: 1.1rem;
            max-width: 700px;
            margin: 0 auto;
        }
.disclaimer-section {
                padding: 2rem 0;
            }
.disclaimer-block {
                padding: 1.5rem;
            }
.hero-section.disclaimer-hero .hero-title {
                font-size: 1.6rem;
            }

/* --- 子页面追加 --- */
/* 本页专属的少量样式，程序会自动合并进站点CSS */
        .privacy-hero {
            padding: 80px 0 40px;
            background: linear-gradient(180deg, rgba(56,189,248,0.08) 0%, transparent 100%);
            border-bottom: 1px solid var(--border-color);
        }
.privacy-content {
            padding: 40px 0 80px;
        }
.privacy-section {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 32px;
            margin-bottom: 24px;
        }
.privacy-section h2 {
            color: var(--accent-main);
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
.privacy-section h2 i {
            font-size: 1.3rem;
            color: var(--accent-soft);
        }
.privacy-section h3 {
            color: var(--text-primary);
            font-size: 1.15rem;
            font-weight: 600;
            margin-top: 24px;
            margin-bottom: 12px;
        }
.privacy-section p {
            color: var(--text-primary);
            line-height: 1.8;
            margin-bottom: 12px;
            opacity: 0.9;
        }
.privacy-section ul {
            padding-left: 20px;
            margin-bottom: 16px;
        }
.privacy-section ul li {
            color: var(--text-primary);
            line-height: 1.8;
            margin-bottom: 8px;
            opacity: 0.9;
        }
.privacy-updated {
            display: inline-block;
            background: rgba(56,189,248,0.15);
            color: var(--accent-main);
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 500;
            margin-bottom: 24px;
        }
.contact-box {
            background: rgba(167,139,250,0.08);
            border: 1px solid rgba(167,139,250,0.2);
            border-radius: 12px;
            padding: 20px 24px;
            margin-top: 24px;
        }
.contact-box p {
            margin-bottom: 4px;
            color: var(--accent-soft);
        }

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