/* ========== 全局重置 & 风格与首页完全一致 ========== */
        *{margin:0;padding:0;box-sizing:border-box;}
        body {
            font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            background: #f9fafc;
            color: #0b1e33;
            line-height: 1.5;
            scroll-behavior: smooth;
        }
        .container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
        
        /* 头部 — 毛玻璃现代 (同首页) */
        header {
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(12px);
            box-shadow: 0 4px 20px rgba(0,0,0,0.02);
            position: sticky;
            top: 0;
            z-index: 50;
            border-bottom: 1px solid #eef2f6;
        }
        .header-flex {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 14px 0;
        }
        .logo-area h1 {
            font-size: 1.9rem;
            font-weight: 750;
            background: linear-gradient(145deg, #0f2b4b, #2563eb);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            letter-spacing: -0.5px;
        }
        .logo-area p {
            font-size: 0.75rem;
            color: #54708f;
            margin-top: 4px;
            font-weight: 400;
            letter-spacing: 0.3px;
        }
        .nav-links {
            display: flex;
            gap: 1.4rem;
            align-items: center;
            flex-wrap: wrap;
        }
        .nav-links a {
            text-decoration: none;
            font-weight: 530;
            color: #1e2f44;
            transition: color 0.15s;
            font-size: 0.95rem;
        }
        .nav-links a:hover, .nav-links a.active {
            color: #2563eb;
        }

        /* 页面标题区 */
        .page-hero {
            text-align: center;
            margin: 48px 0 32px;
        }
        .page-hero h1 {
            font-size: 3rem;
            font-weight: 800;
            background: linear-gradient(135deg, #0b1e2e, #1e4bd2);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
        }
        .security-badge {
            display: inline-block;
            background: #dbeafe;
            padding: 6px 24px;
            border-radius: 40px;
            font-weight: 600;
            color: #1e4bd2;
            border: 1px solid #bdd3ff;
        }

        /* 风险卡片 —— 沿用首页卡片圆角风格 */
        .risk-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin: 40px 0 50px;
        }
        .risk-card {
            background: white;
            border-radius: 32px;
            padding: 28px 22px;
            box-shadow: 0 15px 30px -8px rgba(0,35,70,0.06);
            border: 1px solid #e9edf4;
            transition: all 0.2s;
        }
        .risk-card.green { border-top: 6px solid #10b981; }
        .risk-card.yellow { border-top: 6px solid #fbbf24; }
        .risk-card.red { border-top: 6px solid #ef4444; }
        .risk-header {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 20px;
        }
        .risk-icon { font-size: 2.2rem; }
        .risk-header h3 { font-size: 1.7rem; font-weight: 700; }
        .risk-desc { color: #334e6e; margin-bottom: 20px; font-size: 1rem; }
        .version-tag {
            background: #f1f6fc;
            padding: 8px 16px;
            border-radius: 30px;
            font-weight: 600;
            color: #1e3b63;
            display: inline-block;
            margin-bottom: 16px;
        }
        .download-mini-btn {
            background: transparent;
            border: 2px solid #2563eb;
            color: #2563eb;
            padding: 10px 24px;
            border-radius: 40px;
            font-weight: 700;
            font-size: 0.9rem;
            cursor: pointer;
            transition: 0.15s;
            text-decoration: none;
            display: inline-block;
        }
        .download-mini-btn:hover { background: #2563eb; color: white; }

        /* 智能推荐引擎 (与首页推荐框风格呼应) */
        .recommendation-engine {
            background: linear-gradient(105deg, #ffffff 0%, #f5faff 100%);
            border-radius: 48px;
            padding: 40px 40px;
            margin: 50px 0;
            border: 1px solid #d9e6ff;
            box-shadow: 0 25px 40px -20px rgba(0,67,156,0.12);
        }
        .engine-title {
            font-size: 2.2rem;
            font-weight: 750;
            margin-bottom: 28px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .quiz-panel {
            display: flex;
            flex-wrap: wrap;
            gap: 30px 40px;
            margin-bottom: 30px;
        }
        .quiz-question { flex: 1; min-width: 200px; }
        .quiz-question p { font-weight: 650; margin-bottom: 12px; color: #1e3a6b; }
        .quiz-options { display: flex; gap: 12px; flex-wrap: wrap; }
        .quiz-opt {
            background: white;
            border: 1.5px solid #b9cee8;
            padding: 8px 20px;
            border-radius: 40px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.1s;
            color: #1e3b63;
        }
        .quiz-opt.selected {
            background: #1e3b63;
            border-color: #1e3b63;
            color: white;
        }
        .output-area {
            margin-top: 28px;
            background: #e5effb;
            border-radius: 50px;
            padding: 22px 32px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .rec-text { font-size: 1.4rem; font-weight: 650; }
        .rec-highlight {
            background: #1e3b63;
            color: white;
            padding: 4px 16px;
            border-radius: 40px;
            margin-left: 10px;
        }
        .rec-download-btn {
            background: #1e3b63;
            color: white;
            padding: 14px 34px;
            border-radius: 50px;
            font-weight: 700;
            text-decoration: none;
            border: none;
            cursor: pointer;
            font-size: 1.1rem;
            box-shadow: 0 12px 18px -8px #1e3b6340;
            transition: 0.15s;
        }
        .rec-download-btn:hover { background: #0f2b4b; }

        /* 校验机制 + 折叠安装说明 (创意：折叠减少重复) */
        .verify-section {
            background: white;
            border-radius: 40px;
            padding: 32px 36px;
            margin: 48px 0 40px;
            border: 1px solid #e2ecf9;
        }
        .verify-title {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .checksum-box {
            background: #f1f7fe;
            border-radius: 24px;
            padding: 18px 24px;
            font-family: 'SF Mono', monospace;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 15px 30px;
        }
        .checksum-item { display: flex; align-items: center; gap: 10px; }
        .checksum-label { font-weight: 700; color: #1e3b63; }
        .checksum-value {
            background: #0f1e2f;
            color: #b0d0ff;
            padding: 6px 16px;
            border-radius: 40px;
            font-size: 0.85rem;
        }
        .verify-source { margin-top: 28px; display: flex; gap: 30px; flex-wrap: wrap; }

        /* 平台折叠安装说明 —— 创意核心：每个平台可展开 */
        .install-accordion {
            margin: 40px 0 20px;
        }
        details {
            background: #f8fbfe;
            border-radius: 24px;
            padding: 8px 20px;
            margin-bottom: 12px;
            border: 1px solid #dee9f2;
            transition: all 0.15s;
        }
        details[open] { background: #ffffff; box-shadow: 0 6px 14px rgba(0,0,0,0.02); }
        summary {
            font-weight: 700;
            font-size: 1.25rem;
            padding: 18px 0;
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            gap: 12px;
            color: #1e3b63;
        }
        summary::-webkit-details-marker { display: none; }
        summary::after {
            content: '▼';
            font-size: 0.9rem;
            margin-left: auto;
            color: #2563eb;
            transition: transform 0.2s;
        }
        details[open] summary::after { transform: rotate(180deg); }
        .install-content {
            padding: 8px 0 24px;
            color: #2a4b74;
            border-top: 1px dashed #b9cee8;
        }
        .install-content ol, .install-content ul { padding-left: 24px; margin: 12px 0; }
        .install-content li { margin-bottom: 8px; }

        /* 更新摘要 + FAQ 融合行 */
        .update-faq-row {
            display: flex;
            flex-wrap: wrap;
            gap: 30px;
            margin: 30px 0 60px;
        }
        .changelog-card {
            flex: 1.2;
            background: #0f2b4b;
            border-radius: 32px;
            padding: 32px;
            color: white;
        }
        .changelog-card h3 { font-size: 1.8rem; margin-bottom: 16px; color: white; }
        .changelog-list { list-style: none; }
        .changelog-list li { padding: 12px 0; border-bottom: 1px solid #254a6e; display: flex; gap: 12px; }
        .update-date { background: #2563eb; padding: 2px 12px; border-radius: 30px; font-size: 0.75rem; font-weight: 600; }
        .faq-short {
            flex: 2;
            background: #ffffffd6;
            border-radius: 32px;
            padding: 32px;
            border: 1px solid #eef2f8;
        }
        .faq-short h3 { font-size: 1.9rem; margin-bottom: 20px; }
        .faq-item { margin-bottom: 18px; border-bottom: 1px dashed #d0ddee; padding-bottom: 12px; }
        .faq-q { font-weight: 700; color: #1e3b63; margin-bottom: 6px; }
        .faq-a { color: #365573; }

        /* 返回下载号召区域 */
        .cta-download-bottom {
            background: #0f2b4b;
            border-radius: 60px;
            padding: 48px 40px;
            margin: 60px 0;
            color: white;
            text-align: center;
        }
        .cta-download-bottom h3 { font-size: 2.5rem; font-weight: 700; margin-bottom: 20px; }
        .btn-light {
            background: white;
            color: #0f2b4b;
            padding: 16px 48px;
            border-radius: 60px;
            font-weight: 700;
            font-size: 1.3rem;
            text-decoration: none;
            display: inline-block;
            margin-top: 20px;
            transition: 0.2s;
        }
        .btn-light:hover { background: #e0edff; transform: scale(1.02); }

        footer {
            background: #0b1a2a;
            color: #b0c7de;
            padding: 40px 0 24px;
            margin-top: 20px;
            border-top: 1px solid #1e3347;
        }
        .footer-grid { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 32px; }
        .footer-copyright {
            text-align: center;
            padding-top: 32px;
            font-size: 0.85rem;
            border-top: 1px solid #1e3347;
            margin-top: 24px;
        }

        @media (max-width: 900px) {
            .risk-grid { grid-template-columns: 1fr; }
            .header-flex { flex-direction: column; gap: 12px; }
            .nav-links { justify-content: center; }
            .update-faq-row { flex-direction: column; }
        }
        button { background: none; border: none; font-family: inherit; }
        a { color: inherit; }