/* ========== 全局重置 & 与首页完全统一的风格 ========== */
        *{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 */
        .page-hero {
            text-align: center;
            margin: 48px 0 32px;
        }
        .page-hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            background: linear-gradient(135deg, #0b1e2e, #1e4bd2);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            letter-spacing: -0.02em;
        }
        .badge-changelog {
            display: inline-block;
            background: #dbeafe;
            color: #1e4bd2;
            padding: 8px 28px;
            border-radius: 60px;
            font-weight: 650;
            margin-top: 16px;
            border: 1px solid #bdd3ff;
        }

        /* 最新版本高亮卡片 */
        .latest-release {
            background: linear-gradient(105deg, #ffffff 0%, #f5faff 100%);
            border-radius: 48px;
            padding: 40px 40px;
            margin: 40px 0 50px;
            border: 1px solid #d9e6ff;
            box-shadow: 0 25px 40px -20px rgba(0,67,156,0.12);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
        }
        .latest-left h2 {
            font-size: 2.5rem;
            font-weight: 800;
            margin-bottom: 8px;
        }
        .latest-version {
            background: #1e3b63;
            color: white;
            padding: 4px 20px;
            border-radius: 40px;
            display: inline-block;
            margin: 16px 0;
        }
        .latest-download-btn {
            background: #1e3b63;
            color: white;
            padding: 18px 38px;
            border-radius: 60px;
            font-weight: 700;
            font-size: 1.2rem;
            text-decoration: none;
            display: inline-block;
            box-shadow: 0 16px 28px -8px rgba(30,59,99,0.3);
            transition: 0.15s;
        }
        .latest-download-btn:hover { background: #0f2b4b; transform: scale(1.02); }

        /* 时间轴容器 */
        .timeline {
            margin: 60px 0 40px;
            position: relative;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 32px;
            top: 20px;
            bottom: 20px;
            width: 3px;
            background: linear-gradient(to bottom, #2563eb, #bdd3ff);
            border-radius: 3px;
        }
        .timeline-item {
            position: relative;
            padding-left: 80px;
            margin-bottom: 48px;
        }
        .timeline-marker {
            position: absolute;
            left: 16px;
            top: 8px;
            width: 36px;
            height: 36px;
            background: white;
            border: 3px solid #2563eb;
            border-radius: 50%;
            z-index: 2;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            color: #2563eb;
        }
        .version-card {
            background: white;
            border-radius: 36px;
            padding: 32px 36px;
            box-shadow: 0 15px 30px -8px rgba(0,35,70,0.06);
            border: 1px solid #eaf0fa;
        }
        .version-header {
            display: flex;
            align-items: baseline;
            flex-wrap: wrap;
            gap: 16px 30px;
            margin-bottom: 24px;
        }
        .version-tag {
            font-size: 2rem;
            font-weight: 800;
            background: #1e3b63;
            color: white;
            padding: 4px 24px;
            border-radius: 60px;
        }
        .version-date {
            color: #54708f;
            font-weight: 500;
        }
        .version-badge {
            margin-left: auto;
        }
        .badge-new { background: #10b981; color: white; padding: 6px 18px; border-radius: 40px; font-weight: 600; }
        .badge-stable { background: #2563eb; color: white; padding: 6px 18px; border-radius: 40px; }

        .update-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 20px;
            margin-top: 20px;
        }
        .update-category {
            background: #f8fbfe;
            border-radius: 28px;
            padding: 20px 22px;
        }
        .update-category h4 {
            font-size: 1.2rem;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .update-category ul {
            list-style: none;
        }
        .update-category li {
            margin-bottom: 10px;
            display: flex;
            gap: 10px;
            color: #365573;
        }
        .update-category li::before {
            content: "▹";
            color: #2563eb;
            font-weight: bold;
        }

        /* 历史版本折叠 (简洁) */
        .history-toggle {
            margin: 30px 0 50px;
            text-align: center;
        }
        .history-btn {
            background: white;
            border: 1.5px solid #d4e2f5;
            padding: 14px 40px;
            border-radius: 60px;
            font-weight: 700;
            cursor: pointer;
            color: #1e3b63;
        }
        .older-versions {
            margin-top: 30px;
            display: none;
        }
        .older-versions.show { display: block; }
        .compact-version {
            background: white;
            border-radius: 24px;
            padding: 18px 28px;
            margin-bottom: 12px;
            border: 1px solid #eef2f8;
            display: flex;
            align-items: center;
            gap: 24px;
        }
        .compact-version .ver { font-weight: 800; min-width: 90px; }
        .compact-version .desc { color: #4a607a; }

        /* 底部下载号召 */
        .cta-changelog {
            background: #0f2b4b;
            border-radius: 60px;
            padding: 48px 40px;
            margin: 60px 0 40px;
            color: white;
            text-align: center;
        }
        .cta-changelog h3 { font-size: 2.5rem; font-weight: 700; margin-bottom: 20px; }
        .btn-light-large {
            background: white;
            color: #0f2b4b;
            padding: 16px 52px;
            border-radius: 60px;
            font-weight: 700;
            font-size: 1.3rem;
            text-decoration: none;
            display: inline-block;
            margin-top: 20px;
            transition: 0.2s;
        }
        .btn-light-large: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: 700px) {
            .timeline::before { left: 24px; }
            .timeline-item { padding-left: 60px; }
            .timeline-marker { left: 10px; }
            .version-card { padding: 24px 20px; }
        }