:root {
            --primary: #22d3ee;
            --accent: #fb923c;
            --bg: #0f172a;
            --text: #e2e8f0;
            --text-dim: #94a3b8;
            --border-w: 3px;
            --shadow-hard: 8px 8px 0px rgba(34, 211, 238, 0.15);
            --card-bg: #1e293b;
            --card-bg-2: #111c30;
            --grid-line: rgba(148, 163, 184, 0.08);
            --point-bg: rgba(34, 211, 238, 0.08);
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body {
            background-color: var(--bg);
            color: var(--text);
            font-family: 'Inter', '思源黑体', -apple-system, sans-serif;
            font-weight: 400;
            line-height: 1.7;
            background-image: 
                linear-gradient(var(--grid-line) 1px, transparent 1px),
                linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
            background-size: 40px 40px;
            position: relative;
        }
        /* 点阵覆盖 */
        body::before {
            content: '';
            position: fixed;
            inset: 0;
            background-image: radial-gradient(circle, rgba(251, 146, 60, 0.08) 1px, transparent 1px);
            background-size: 24px 24px;
            pointer-events: none;
            z-index: 0;
        }
        .container, .container-fluid { position: relative; z-index: 2; }
        h1, h2, h3, .serif-display {
            font-family: 'Inter', '思源宋体', Georgia, 'Times New Roman', serif;
            font-weight: 900;
            letter-spacing: -0.02em;
        }
        h2 { font-size: calc(1.8rem + 0.8vw); }
        .border-hard { border: var(--border-w) solid var(--text); border-radius: 0 !important; }
        .shadow-hard { box-shadow: var(--shadow-hard); }
        .bg-card { background-color: var(--card-bg); }
        .bg-card-2 { background-color: var(--card-bg-2); }
        .text-accent { color: var(--accent); }
        .text-primary-cyan { color: var(--primary); }
        .btn-hard {
            background-color: var(--accent);
            color: #0f172a;
            border: 3px solid #0f172a;
            border-radius: 0;
            font-weight: 800;
            padding: 0.6rem 1.6rem;
            box-shadow: 5px 5px 0 rgba(0,0,0,0.3);
            transition: all 0.2s;
            position: relative;
            overflow: hidden;
            z-index: 1;
            display: inline-block;
        }
        .btn-hard::before {
            content: '';
            position: absolute;
            top: 0; left: -100%;
            width: 100%; height: 100%;
            background: linear-gradient(100deg, transparent, rgba(255,255,255,0.4), transparent);
            transition: left 0.5s;
            z-index: -1;
        }
        .btn-hard:hover::before { left: 100%; }
        .btn-hard:hover {
            background-color: var(--primary);
            box-shadow: 2px 2px 0 rgba(0,0,0,0.3);
        }
        /* 导航 */
        .navbar-hard {
            background: rgba(15, 23, 42, 0.9);
            backdrop-filter: blur(6px);
            border-bottom: 3px solid var(--text);
            border-radius: 0;
            padding-top: 0.8rem;
            padding-bottom: 0.8rem;
        }
        .navbar-brand {
            font-family: 'Inter', '思源宋体', serif;
            font-weight: 900;
            font-size: 1.8rem;
            color: var(--text) !important;
            letter-spacing: -0.5px;
        }
        .navbar-brand i { color: var(--accent); margin-right: 8px; }
        .nav-link-custom {
            color: var(--text) !important;
            font-weight: 600;
            margin: 0 0.8rem;
            border-bottom: 2px solid transparent;
            padding: 0.2rem 0 !important;
            transition: 0.2s;
            text-transform: uppercase;
            font-size: 0.9rem;
            letter-spacing: 0.5px;
        }
        .nav-link-custom:hover {
            border-bottom-color: var(--accent);
            color: var(--primary) !important;
        }
        /* hero */
        .hero-section {
            padding: 5rem 0 4rem;
            background-image: url('{随机图片}');
            background-size: cover;
            background-attachment: fixed;
            background-position: center 30%;
            position: relative;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(15, 23, 42, 0.7);
            backdrop-filter: brightness(0.6);
            z-index: -1;
        }
        .hero-title {
            font-size: 3.2rem;
            font-weight: 900;
            line-height: 1.1;
            text-transform: uppercase;
        }
        .typewriter {
            display: inline-block;
            overflow: hidden;
            white-space: nowrap;
            border-right: 4px solid var(--accent);
            animation: typing 3s steps(12) forwards, blink 0.75s step-end infinite;
            max-width: 100%;
        }
        @keyframes typing { from { width: 0 } to { width: 100% } }
        @keyframes blink { 50% { border-color: transparent } }
        /* bento grid */
        .bento-grid {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 1.2rem;
            margin: 3rem 0;
        }
        .bento-item {
            background-color: var(--card-bg);
            border: 3px solid var(--text);
            border-radius: 0;
            padding: 1.8rem 1.5rem;
            box-shadow: 6px 6px 0 rgba(0,0,0,0.3);
            transition: 0.2s;
            position: relative;
            overflow: hidden;
        }
        .bento-item:hover { box-shadow: 10px 10px 0 rgba(34, 211, 238, 0.2); transform: translate(-2px,-2px); }
        .bento-1 { grid-column: span 5; }
        .bento-2 { grid-column: span 7; }
        .bento-3 { grid-column: span 4; }
        .bento-4 { grid-column: span 8; }
        .bento-5 { grid-column: span 7; }
        .bento-6 { grid-column: span 5; }
        .bento-7 { grid-column: span 12; }
        .bento-icon { font-size: 2.5rem; color: var(--primary); margin-bottom: 1rem; }
        /* 步骤条 */
        .step-row {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin: 2rem 0;
        }
        .step-card {
            flex: 1 1 180px;
            background: var(--card-bg-2);
            border: 3px solid var(--text);
            border-radius: 0;
            padding: 1.2rem;
            box-shadow: 5px 5px 0 rgba(0,0,0,0.3);
            text-align: center;
        }
        .step-num {
            font-size: 2.8rem;
            font-weight: 900;
            color: var(--accent);
            line-height: 1;
        }
        /* FAQ */
        .accordion-item {
            background: var(--card-bg);
            border: 3px solid var(--text);
            border-radius: 0 !important;
            margin-bottom: 1rem;
        }
        .accordion-button {
            background: var(--card-bg);
            color: var(--text);
            border-radius: 0;
            font-weight: 700;
            box-shadow: none;
            border-bottom: 2px solid rgba(226, 232, 240, 0.3);
        }
        .accordion-button:not(.collapsed) {
            background: var(--card-bg-2);
            color: var(--primary);
        }
        .accordion-button::after {
            filter: invert(1);
        }
        .accordion-body { color: var(--text-dim); }
        /* 页脚与友链 */
        .footer-hard {
            border-top: 4px solid var(--text);
            margin-top: 3rem;
            background: #0a1120;
            padding: 2rem 0;
        }
        .friend-links {
            border: 3px solid var(--text);
            padding: 1.5rem;
            background: var(--card-bg-2);
            box-shadow: 4px 4px 0 rgba(0,0,0,0.3);
        }
        .link-underline {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 4px;
            margin: 0 0.5rem;
        }
        .link-underline:hover { color: var(--accent); }
        /* 通用 */
        .section-gap { padding: 2.5rem 0; }
        .fadein {
            opacity: 0;
            transform: translateY(10px);
            transition: opacity 0.6s, transform 0.4s;
        }
        .fadein.visible { opacity: 1; transform: translateY(0); }
        .lazy-bg { background-color: #1e293b; background-size: cover; }

/* --- 子页面追加 --- */
.rank-item {
            display: flex;
            align-items: center;
            gap: 1.2rem;
            padding: 1rem 1.2rem;
            margin-bottom: 1rem;
            background: var(--card-bg);
            border: var(--border-w) solid var(--primary);
            border-radius: 12px;
            transition: all .3s ease;
        }
.rank-item:hover {
            transform: translateX(6px);
            box-shadow: var(--shadow-hard);
        }
.rank-num {
            font-size: 1.8rem;
            font-weight: 900;
            min-width: 3.2rem;
            text-align: center;
            color: var(--accent);
            font-style: italic;
        }
.rank-num.top {
            color: var(--primary);
        }
.rank-info {
            flex: 1;
        }
.rank-info h4 {
            margin-bottom: .2rem;
            font-weight: 700;
            color: var(--text);
        }
.rank-info p {
            margin: 0;
            color: var(--text-dim);
            font-size: .9rem;
        }
.rank-meta {
            display: flex;
            gap: 1rem;
            font-size: .85rem;
            color: var(--text-dim);
        }
.rank-tag {
            background: var(--point-bg);
            padding: .2rem .8rem;
            border-radius: 20px;
            color: var(--primary);
            font-weight: 600;
            font-size: .8rem;
        }
.section-title {
            margin-top: 3rem;
            margin-bottom: 1.8rem;
            padding-bottom: .6rem;
            border-bottom: 3px solid var(--primary);
            display: inline-block;
        }
.trend-up {
            color: #4ade80;
        }
.trend-down {
            color: #f87171;
        }
.trend-flat {
            color: var(--text-dim);
        }
.rank-item {
                flex-wrap: wrap;
                gap: .6rem;
            }
.rank-meta {
                width: 100%;
                margin-top: .4rem;
                flex-wrap: wrap;
            }

/* --- 子页面追加 --- */
/* 关于页微调，仅覆盖个别组件，尽量沿用全局变量 */
        .about-hero {
            background: radial-gradient(circle at 10% 20%, rgba(34,211,238,0.12), transparent 50%);
            border-bottom: var(--border-w) solid var(--primary);
        }
.about-card {
            background: var(--card-bg);
            border: var(--border-w) solid var(--primary);
            box-shadow: var(--shadow-hard);
            padding: 1.8rem;
            height: 100%;
            transition: transform .2s ease, box-shadow .2s ease;
        }
.about-card:hover {
            transform: translateY(-6px);
            box-shadow: 10px 10px 0 rgba(251,146,60,.2);
        }
.about-card h3 {
            color: var(--primary);
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 1rem;
            font-size: 1.35rem;
        }
.about-card p, .about-card li {
            color: var(--text-dim);
            font-size: .98rem;
            line-height: 1.7;
        }
.about-card i {
            color: var(--accent);
            font-size: 2rem;
            margin-bottom: .75rem;
        }
.section-title-border {
            border-left: 6px solid var(--accent);
            padding-left: 1.2rem;
            margin-bottom: 2.5rem;
        }
.section-title-border h2 {
            font-weight: 800;
            color: var(--text);
            font-size: 2rem;
            letter-spacing: -0.02em;
        }
.section-title-border p {
            color: var(--text-dim);
            max-width: 700px;
        }
.steps-about {
            list-style: none;
            padding-left: 0;
        }
.steps-about li {
            display: flex;
            gap: 1rem;
            align-items: flex-start;
            margin-bottom: 1.2rem;
            background: var(--point-bg);
            padding: .8rem 1.2rem;
            border-radius: 4px;
            border-left: 4px solid var(--accent);
        }
.steps-about li i {
            color: var(--accent);
            font-size: 1.2rem;
            margin-top: .2rem;
        }
.badge-about {
            display: inline-block;
            background: var(--primary);
            color: #0f172a;
            font-weight: 700;
            padding: .15rem .9rem;
            border-radius: 40px;
            letter-spacing: .03em;
            font-size: .8rem;
            margin-right: .6rem;
        }
/* 确保Bootstrap栅格不冲突 */
        .container {
            max-width: 1280px;
        }

/* --- 子页面追加 --- */
/* 本页专属小样式 — 仅用于专题网格的间距与悬停效果 */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 2rem;
            margin-top: 2rem;
        }
.topic-item {
            transition: transform 0.2s ease, box-shadow 0.2s ease;
        }
.topic-item:hover {
            transform: translateY(-6px);
            box-shadow: 0 12px 24px rgba(34, 211, 238, 0.2);
        }
.topic-icon {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 0.75rem;
        }
.tag-chip {
            display: inline-block;
            background: var(--point-bg);
            color: var(--primary);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.2rem 0.9rem;
            border-radius: 30px;
            margin-right: 0.5rem;
            margin-top: 0.5rem;
            border: 1px solid rgba(34, 211, 238, 0.25);
            letter-spacing: 0.02em;
        }
.tag-chip i {
            margin-right: 4px;
            font-size: 0.7rem;
        }
.section-divider {
            border-top: 2px dashed rgba(34, 211, 238, 0.25);
            margin: 3rem 0 2rem;
        }
/* 覆盖bootstrap手风琴/卡片等可能出现的白底，确保深色风格统一 */
        .card, .card-body, .card-title, .card-text, .card-header, .card-footer,
        .list-group-item, .accordion-item, .accordion-button, .accordion-body {
            background: var(--card-bg) !important;
            color: var(--text) !important;
            border-color: var(--grid-line) !important;
        }
.accordion-button:focus {
            box-shadow: none !important;
        }

/* --- 子页面追加 --- */
/* 本页专属补充样式 */
        .subscribe-hero {
            padding: 80px 0 60px;
            background: radial-gradient(ellipse at 70% 20%, rgba(34, 211, 238, 0.08) 0%, transparent 60%);
        }
.subscribe-badge {
            display: inline-block;
            background: var(--point-bg);
            color: var(--primary);
            border: 2px solid var(--primary);
            padding: 6px 18px;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 700;
            letter-spacing: 0.5px;
            margin-bottom: 20px;
        }
.subscribe-h1 {
            font-size: 2.6rem;
            font-weight: 900;
            line-height: 1.3;
            margin-bottom: 16px;
        }
.subscribe-h1 span {
            color: var(--primary);
        }
.subscribe-sub {
            font-size: 1.15rem;
            color: var(--text-dim);
            max-width: 600px;
            margin: 0 auto 30px;
        }
.plan-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
            margin-top: 40px;
        }
.plan-card {
            background: var(--card-bg);
            border: var(--border-w) solid var(--text-dim);
            border-radius: 16px;
            padding: 32px 24px;
            position: relative;
            transition: all 0.3s ease;
            text-align: center;
        }
.plan-card:hover {
            transform: translateY(-4px);
            border-color: var(--primary);
            box-shadow: var(--shadow-hard);
        }
.plan-card.recommended {
            border-color: var(--primary);
            box-shadow: var(--shadow-hard);
        }
.plan-tag {
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--primary);
            color: var(--bg);
            font-size: 0.75rem;
            font-weight: 800;
            padding: 4px 16px;
            border-radius: 20px;
            letter-spacing: 0.5px;
        }
.plan-icon {
            font-size: 2.2rem;
            margin-bottom: 16px;
        }
.plan-name {
            font-size: 1.4rem;
            font-weight: 800;
            margin-bottom: 8px;
            color: var(--text);
        }
.plan-desc {
            color: var(--text-dim);
            font-size: 0.95rem;
            line-height: 1.6;
            margin-bottom: 20px;
        }
.plan-feature {
            list-style: none;
            padding: 0;
            margin: 0 0 24px;
            text-align: left;
        }
.plan-feature li {
            padding: 8px 0;
            color: var(--text);
            font-size: 0.95rem;
            border-bottom: 1px dashed var(--grid-line);
        }
.plan-feature li i {
            color: var(--primary);
            margin-right: 10px;
            width: 16px;
            text-align: center;
        }
.subscribe-steps {
            background: var(--card-bg-2);
            border-radius: 16px;
            border: var(--border-w) solid var(--text-dim);
            padding: 40px 32px;
            margin-top: 60px;
        }
.step-row:last-child { margin-bottom: 0; }
.step-content { flex: 1; }
.step-content h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text);
        }
.step-content p {
            color: var(--text-dim);
            font-size: 0.95rem;
            line-height: 1.6;
            margin: 0;
        }
.subscribe-faq {
            margin-top: 60px;
        }
.faq-item {
            background: var(--card-bg);
            border: 2px solid var(--text-dim);
            border-radius: 12px;
            padding: 24px;
            margin-bottom: 16px;
            transition: border-color 0.3s;
        }
.faq-item:hover { border-color: var(--primary); }
.faq-item h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
.faq-item h3 i { font-size: 0.9rem; }
.faq-item p {
            color: var(--text-dim);
            font-size: 0.95rem;
            line-height: 1.7;
            margin: 0;
            padding-left: 28px;
        }
.subscribe-cta {
            text-align: center;
            padding: 60px 20px;
            margin-top: 40px;
            background: var(--card-bg);
            border: var(--border-w) solid var(--primary);
            border-radius: 16px;
            box-shadow: var(--shadow-hard);
        }
.subscribe-cta h2 {
            font-size: 2rem;
            font-weight: 900;
            margin-bottom: 16px;
        }
.subscribe-cta p {
            color: var(--text-dim);
            font-size: 1.05rem;
            max-width: 500px;
            margin: 0 auto 24px;
        }
.subscribe-h1 { font-size: 2rem; }
.plan-grid { grid-template-columns: 1fr; }
.subscribe-steps { padding: 28px 20px; }

/* --- 子页面追加 --- */
/* 隐私条款专属补充样式 */
        .privacy-wrap {
            padding: 60px 0;
        }
.privacy-hero {
            margin-bottom: 40px;
            padding: 40px;
            border-left: 5px solid var(--primary);
            background: var(--card-bg);
        }
.privacy-hero h1 {
            color: var(--primary);
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 15px;
        }
.privacy-hero p {
            color: var(--text-dim);
            font-size: 1.05rem;
            line-height: 1.8;
            margin-bottom: 0;
        }
.privacy-section {
            margin-bottom: 50px;
            padding: 35px;
            background: var(--card-bg);
            border: 2px solid var(--border-color);
            position: relative;
            transition: all 0.3s ease;
        }
.privacy-section:hover {
            box-shadow: var(--shadow-hard);
            transform: translateY(-3px);
        }
.privacy-section h2 {
            color: var(--accent);
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 20px;
            padding-bottom: 15px;
            border-bottom: 2px solid var(--point-bg);
        }
.privacy-section h3 {
            color: var(--primary);
            font-size: 1.15rem;
            font-weight: 600;
            margin-top: 20px;
            margin-bottom: 12px;
        }
.privacy-section p {
            color: var(--text);
            line-height: 1.9;
            margin-bottom: 15px;
        }
.privacy-section ul {
            padding-left: 20px;
            margin-bottom: 15px;
        }
.privacy-section ul li {
            color: var(--text);
            line-height: 1.9;
            margin-bottom: 8px;
            position: relative;
            padding-left: 20px;
        }
.privacy-section ul li::before {
            content: "→";
            position: absolute;
            left: 0;
            color: var(--primary);
            font-weight: 600;
        }
.privacy-section .notice-box {
            background: var(--point-bg);
            padding: 20px;
            border-left: 4px solid var(--primary);
            margin: 20px 0;
        }
.privacy-section .notice-box p {
            color: var(--text);
            margin-bottom: 0;
        }
.last-updated {
            text-align: center;
            color: var(--text-dim);
            font-size: 0.9rem;
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid var(--border-color);
        }
.privacy-hero,
            .privacy-section {
                padding: 25px;
            }
.privacy-hero h1 {
                font-size: 1.8rem;
            }

/* --- 子页面追加 --- */
/* 本页专属样式 - 免责声明 */
        .disclaimer-hero {
            padding: 80px 0 50px;
            position: relative;
        }
.disclaimer-card {
            background: var(--card-bg);
            border: var(--border-w) solid var(--primary);
            box-shadow: var(--shadow-hard);
            border-radius: 12px;
            padding: 40px;
            margin-bottom: 40px;
            transition: transform 0.3s ease;
        }
.disclaimer-card:hover {
            transform: translateY(-4px);
        }
.disclaimer-card h2 {
            color: var(--primary);
            font-weight: 800;
            font-size: 1.6rem;
            margin-bottom: 20px;
            padding-bottom: 15px;
            border-bottom: 2px solid rgba(34, 211, 238, 0.3);
            position: relative;
        }
.disclaimer-card h2 i {
            margin-right: 10px;
            color: var(--accent);
        }
.disclaimer-card p, .disclaimer-card li {
            color: var(--text);
            line-height: 1.8;
            font-size: 1.05rem;
            margin-bottom: 15px;
        }
.disclaimer-card ul {
            padding-left: 20px;
            margin-bottom: 20px;
        }
.disclaimer-card li {
            margin-bottom: 8px;
            color: var(--text-dim);
        }
.disclaimer-card li strong {
            color: var(--text);
        }
.highlight-box {
            background: var(--point-bg);
            border-left: 4px solid var(--primary);
            padding: 20px 25px;
            margin: 25px 0;
            border-radius: 0 8px 8px 0;
        }
.highlight-box p {
            margin-bottom: 5px;
        }
.breadcrumb-custom {
            padding: 15px 0;
            margin-bottom: 20px;
            color: var(--text-dim);
            font-size: 0.95rem;
        }
.breadcrumb-custom a {
            color: var(--primary);
            text-decoration: none;
        }
.breadcrumb-custom a:hover {
            color: var(--accent);
        }
.breadcrumb-custom i {
            margin: 0 8px;
            font-size: 12px;
        }
.disclaimer-card {
                padding: 25px;
            }
.disclaimer-card h2 {
                font-size: 1.3rem;
            }

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