/* 创意变量 + 重置 —— 与首页统一蓝紫色系 */
        *{margin:0;padding:0;box-sizing:border-box;}
        body{
            font-family:'Inter', system-ui, -apple-system, sans-serif;
            background:#fafcff; color:#1a1f36; line-height:1.5;
            -webkit-font-smoothing:antialiased;
        }
        :root{
            --primary:#4f46e5;
            --primary-light:#6366f1;
            --accent:#06b6d4;
            --surface:#ffffff;
            --bg-soft:#f8fafd;
            --border-light:#e9eef4;
            --text-main:#1e293b;
            --text-muted:#475569;
            --shadow-card:0 18px 35px -12px rgba(0,0,0,0.07), 0 6px 12px -4px rgba(0,0,0,0.03);
            --radius-xl:2rem;
            --radius-lg:1.5rem;
        }
        .container{max-width:1280px; margin:0 auto; padding:0 24px;}
        
        /* 导航 (同首页玻璃效果) */
        .navbar{
            background:rgba(255,255,255,0.85); backdrop-filter:blur(12px);
            -webkit-backdrop-filter:blur(12px);
            border-bottom:1px solid rgba(79,70,229,0.12);
            position:sticky; top:0; z-index:50;
        }
        .nav-flex{display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; padding:0.9rem 0;}
        .logo-area{display:flex; align-items:center; gap:10px;}
        .logo-icon{background:linear-gradient(145deg, #4f46e5, #7c3aed); width:40px; height:40px; border-radius:14px; display:flex; align-items:center; justify-content:center; color:white; font-weight:700; font-size:22px; box-shadow:0 6px 12px -4px rgba(79,70,229,0.3);}
        .logo-text{font-size:1.6rem; font-weight:700; color:#0b1120; letter-spacing:-0.4px;}
        .logo-text span{color:var(--primary); font-weight:800;}
        .nav-links{display:flex; gap:28px; align-items:center; flex-wrap:wrap;}
        .nav-links a{text-decoration:none; font-weight:500; color:#2c3e50; transition:0.15s; font-size:1rem; padding:6px 2px; border-bottom:2px solid transparent;}
        .nav-links a:hover, .nav-links a.active{color:var(--primary); border-bottom-color:var(--primary);}
        
        /* 页面头部 */
        .page-header{padding:2.5rem 0 1.5rem; text-align:center;}
        .page-header h1{font-size:2.8rem; font-weight:800; color:#0a0f2c;}
        .page-header p{color:var(--text-muted); font-size:1.2rem;}
        
        /* 版本实验室大卡片 (发布会风格) */
        .release-spotlight{
            background:linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
            border-radius:2.5rem; padding:2.2rem 2.5rem; margin:1.5rem 0 2.5rem;
            color:white; display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between;
        }
        .spotlight-badge{background:rgba(255,255,255,0.2); padding:6px 20px; border-radius:40px; display:inline-block; font-weight:600;}
        .spotlight-version{font-size:3.2rem; font-weight:800; margin:0.5rem 0 0.2rem;}
        .spotlight-date{opacity:0.8; margin-bottom:1.5rem;}
        .spotlight-changes{list-style:none;}
        .spotlight-changes li{margin-bottom:8px; display:flex; align-items:center; gap:10px;}
        .btn-light{background:white; color:#1e1b4b; padding:14px 32px; border-radius:60px; font-weight:700; text-decoration:none; display:inline-flex; align-items:center; gap:10px; transition:0.2s;}
        .btn-light:hover{background:#eef2ff; transform:scale(1.02);}
        
        /* 平台分舱设计：卡片式下载区 */
        .fleet-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:20px; margin:2rem 0;}
        .fleet-card{
            background:var(--surface); border-radius:var(--radius-lg); padding:1.8rem 1.5rem;
            border:1px solid var(--border-light); transition:0.2s; text-decoration:none; color:inherit;
            box-shadow:0 6px 12px -6px #e2e8f0;
        }
        .fleet-card:hover{border-color:var(--primary); box-shadow:var(--shadow-card); transform:translateY(-3px);}
        .fleet-icon{font-size:2.2rem; color:var(--primary); margin-bottom:1rem;}
        .fleet-card h3{font-size:1.5rem; margin-bottom:0.5rem;}
        .fleet-tag{display:inline-block; background:#ede9fe; color:var(--primary); padding:2px 12px; border-radius:40px; font-size:0.75rem; font-weight:600;}
        
        /* 为什么更安全区域 */
        .security-notes{background:#f5f7fd; border-radius:var(--radius-xl); padding:2rem; margin:2.5rem 0;}
        
        /* 可视化安装步骤 */
        .steps-visual{display:flex; justify-content:space-around; flex-wrap:wrap; gap:20px; margin:2rem 0;}
        .step-item{flex:1; min-width:180px; text-align:center;}
        .step-num{background:var(--primary); width:50px; height:50px; border-radius:30px; display:flex; align-items:center; justify-content:center; color:white; font-weight:700; font-size:1.5rem; margin:0 auto 1rem;}
        
        /* 历史版本时间轴 */
        .timeline{position:relative; padding-left:20px;}
        .timeline-item{display:flex; gap:20px; margin-bottom:1.2rem; align-items:baseline;}
        .timeline-date{font-weight:700; min-width:80px; color:var(--primary);}
        .timeline-version{font-weight:600;}
        
        /* Android 应用商店卡片 */
        .app-card{background:var(--surface); border-radius:2rem; padding:2rem; display:flex; flex-wrap:wrap; gap:20px; align-items:center; border:1px solid var(--border-light); margin:2rem 0;}
        .app-icon{background:linear-gradient(145deg, #06b6d4, #3b82f6); width:80px; height:80px; border-radius:20px; display:flex; align-items:center; justify-content:center; color:white; font-size:2.8rem;}
        .arch-selector{display:flex; gap:8px; flex-wrap:wrap; margin:1rem 0;}
        .arch-btn{background:#f1f5f9; padding:6px 16px; border-radius:40px; font-size:0.9rem; border:1px solid transparent; cursor:pointer;}
        .arch-btn.active{background:var(--primary); color:white;}
        
        .btn-primary{
            background:var(--primary); color:white; padding:12px 28px; border-radius:60px;
            font-weight:600; text-decoration:none; display:inline-flex; align-items:center; gap:10px;
            box-shadow:0 8px 18px -6px rgba(79,70,229,0.3);
        }
        .btn-outline{
            background:transparent; border:1.5px solid var(--border-light); padding:12px 28px;
            border-radius:60px; font-weight:600; text-decoration:none; color:var(--text-main);
            display:inline-flex; align-items:center; gap:8px;
        }
        .btn-outline:hover{background:#f1f5fe; border-color:var(--primary-light);}
        
        .footer{background:#f0f4fe; padding:2.8rem 0; margin-top:3rem; border-top:1px solid #d9e2ef;}
        .footer a{color:#2c5f4a; text-decoration:none;}
        .footer a:hover{color:var(--primary);}
        
        @media (max-width:900px){
            .fleet-grid{grid-template-columns:1fr 1fr;}
            .page-header h1{font-size:2.2rem;}
        }
        @media (max-width:600px){
            .fleet-grid{grid-template-columns:1fr;}
            .release-spotlight{text-align:center; justify-content:center;}
        }