:root {
            --primary: #6C5CE7;
            --primary-hover: #5A4BD1;
            --dark: #0f172a;
            --light: #f8fafc;
            --text: #475569;
            --border: #e2e8f0;
            --radius: 16px;
        }
        *{margin:0;padding:0;box-sizing:border-box;}
        body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--text);background:#fff;line-height:1.6;}
        header{border-bottom:1px solid var(--border);position:sticky;top:0;background:rgba(255,255,255,0.85);backdrop-filter:blur(12px);z-index:100;}
        .nav-container{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;padding:16px 20px;}
        .logo a{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:700;color:var(--primary);text-decoration:none;}
        .logo svg{width:32px;height:32px;fill:var(--primary);}
        .nav-links a{color:var(--text);text-decoration:none;margin-left:25px;font-size:15px;font-weight:500;transition:all 0.2s;padding:6px 12px;border-radius:6px;}
        .nav-links a:hover,.nav-links a.active{color:#fff;background-color:var(--primary);}

        section{padding:80px 20px;}
        .container{max-width:1200px;margin:0 auto;}
        .section-title{font-size:36px;color:var(--dark);font-weight:800;letter-spacing:-0.5px;}
        .section-subtitle{font-size:16px;color:#64748b;}

        /* 下载页头部居中 */
        .download-header{background:radial-gradient(120% 120% at 50% 0%, rgba(108,92,231,0.05) 0%, rgba(255,255,255,0) 100%);text-align:center;}
        .download-header .container{display:flex;flex-direction:column;align-items:center;justify-content:center;}

        .download-category{margin-bottom:60px;}
        .category-title{font-size:26px;color:var(--dark);margin-bottom:20px;display:flex;align-items:center;gap:12px;font-weight:700;}
        .category-title .icon{font-size:32px;}
        .download-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;}
        .download-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:28px 24px;text-align:center;transition:all 0.25s;}
        .download-card:hover{transform:translateY(-5px);box-shadow:0 18px 30px -10px rgba(108,92,231,0.08);border-color:#cbd5e1;}
        .os-icon{font-size:48px;margin-bottom:18px;}
        .os-name{font-size:20px;font-weight:700;color:var(--dark);margin-bottom:8px;}
        .os-version{font-size:13px;color:var(--primary);font-weight:600;margin-bottom:14px;}
        .os-desc{font-size:14px;color:#64748b;margin-bottom:22px;min-height:40px;}
        .download-btn{display:inline-block;background:var(--primary);color:#fff;padding:12px 24px;border-radius:8px;text-decoration:none;font-weight:600;transition:all 0.2s;box-shadow:0 4px 12px rgba(108,92,231,0.2);}
        .download-btn:hover{background:var(--primary-hover);transform:translateY(-2px);box-shadow:0 8px 20px rgba(108,92,231,0.3);}
        .hash-info{font-size:12px;color:#94a3b8;margin-top:12px;}

        .github-banner{background:linear-gradient(135deg, rgba(108,92,231,0.03) 0%, rgba(108,92,231,0.08) 100%);border:1px dashed var(--primary);border-radius:var(--radius);padding:30px;text-align:center;margin:60px 0 0;}
        .github-banner p{font-size:16px;color:var(--dark);margin-bottom:15px;}
        .btn-outline{display:inline-block;background:#fff;color:var(--primary);padding:12px 28px;border-radius:8px;text-decoration:none;font-weight:600;border:1px solid var(--primary);transition:all 0.2s;}
        .btn-outline:hover{background:var(--primary);color:#fff;}

        /* 版本更新日志创意版块 */
        .changelog-section{margin:80px auto;}
        .changelog-header{text-align:center;margin-bottom:50px;}
        .timeline{position:relative;max-width:800px;margin:0 auto;padding-left:40px;}
        .timeline::before{content:'';position:absolute;left:18px;top:0;bottom:0;width:3px;background:linear-gradient(to bottom, var(--primary), #a29bfe);border-radius:3px;}
        .tl-item{position:relative;margin-bottom:40px;padding:24px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);transition:all 0.2s;}
        .tl-item:hover{box-shadow:0 10px 25px -5px rgba(108,92,231,0.05);border-color:#cbd5e1;}
        .tl-item::before{content:'';position:absolute;left:-28px;top:28px;width:12px;height:12px;background:var(--primary);border:3px solid #fff;border-radius:50%;box-shadow:0 0 0 3px rgba(108,92,231,0.2);}
        .tl-version{font-size:14px;font-weight:700;color:var(--primary);margin-bottom:6px;}
        .tl-date{font-size:13px;color:#94a3b8;margin-bottom:12px;}
        .tl-content{font-size:15px;color:var(--text);}
        .tl-content ul{padding-left:20px;margin-top:6px;}
        .tl-content li{margin-bottom:6px;}

        footer{background:var(--dark);color:#94a3b8;padding:70px 20px 40px;font-size:14px;border-top:1px solid #1e293b;}
        .footer-grid{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:2fr repeat(4,1fr);gap:40px;padding-bottom:40px;border-bottom:1px solid #1e293b;}
        .footer-brand h4{color:#fff;font-size:18px;margin-bottom:12px;}
        .footer-column h5{color:#fff;font-size:15px;margin-bottom:16px;font-weight:600;}
        .footer-column ul{list-style:none;}
        .footer-column li{margin-bottom:10px;}
        .footer-column a{color:#94a3b8;text-decoration:none;transition:color 0.2s;}
        .footer-column a:hover{color:#fff;}
        .footer-bottom{max-width:1200px;margin:30px auto 0;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:15px;}

        @media(max-width:768px){
            .nav-container{flex-direction:column;gap:15px;}
            .nav-links a{margin-left:10px;font-size:14px;}
            .footer-grid{grid-template-columns:1fr;}
            .timeline{padding-left:30px;}
            .tl-item::before{left:-22px;}
        }