/* 极简重置 —— 与首页风格完全一致，加载极速 */
        *{margin:0;padding:0;box-sizing:border-box;}
        body{font-family:system-ui,-apple-system,'Segoe UI',Roboto,'Helvetica Neue',sans-serif;background:#f5f7fc;color:#1e1f2a;line-height:1.5;-webkit-font-smoothing:antialiased;}
        .wrapper{max-width:1200px;margin:0 auto;padding:0 24px;}
        .nav-bar{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;padding:18px 0;border-bottom:1px solid rgba(0,0,0,0.05);}
        .logo-area{font-weight:700;font-size:1.5rem;letter-spacing:-0.02em;background:linear-gradient(135deg,#0b1c3a 0%,#2a5c9e 100%);-webkit-background-clip:text;background-clip:text;color:transparent;}
        .logo-area span{font-weight:400;font-size:0.9rem;color:#5e6f8d;margin-left:6px;background:none;-webkit-background-clip:unset;background-clip:unset;color:#5e6f8d;}
        .nav-links{display:flex;gap:28px;font-weight:500;}
        .nav-links a{text-decoration:none;color:#2c3e50;font-size:1rem;transition:color 0.15s;}
        .nav-links a:hover{color:#1e5fd9;}
        .nav-links a.active{color:#1e5fd9;font-weight:600;border-bottom:2px solid #1e5fd9;padding-bottom:4px;}
        .nav-download-btn{background:#1e5fd9;color:white !important;padding:10px 22px;border-radius:60px;font-weight:600;font-size:0.95rem;box-shadow:0 6px 14px rgba(30,95,217,0.25);transition:all 0.2s;border:none;display:inline-block;text-decoration:none;}
        .nav-download-btn:hover{background:#154bb5;transform:translateY(-1px);box-shadow:0 10px 20px rgba(30,95,217,0.3);}
        
        /* 页面头部 */
        .page-header{margin:40px 0 20px;}
        .page-header h1{font-size:2.5rem;font-weight:700;letter-spacing:-0.02em;color:#0a1a2b;max-width:900px;}
        .page-header .subhead{font-size:1.2rem;color:#406180;margin-top:12px;border-left:4px solid #1e5fd9;padding-left:20px;max-width:720px;}

        /* 多平台卡片区 (行动核心) */
        .platform-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin:30px 0 40px;}
        .platform-card{background:#ffffff;border-radius:32px;padding:28px 22px 26px;box-shadow:0 15px 30px -8px rgba(0,20,50,0.08);transition:all 0.25s;border:1px solid rgba(255,255,255,0.5);display:flex;flex-direction:column;}
        .platform-card:hover{transform:translateY(-6px);box-shadow:0 25px 40px -12px rgba(30,95,217,0.15);border-color:#d0e0ff;}
        .platform-icon{font-size:2.8rem;margin-bottom:16px;}
        .platform-card h2{font-size:1.9rem;font-weight:700;margin-bottom:8px;letter-spacing:-0.02em;}
        .platform-badge{background:#eef4ff;color:#1e5fd9;padding:4px 12px;border-radius:30px;font-weight:500;font-size:0.8rem;display:inline-block;width:fit-content;margin-bottom:18px;}
        .download-main-btn{background:#1e5fd9;color:white;border:none;padding:14px 0;border-radius:60px;font-weight:700;font-size:1.2rem;text-align:center;text-decoration:none;margin:16px 0 12px;box-shadow:0 8px 16px rgba(30,95,217,0.25);transition:0.15s;display:block;}
        .download-main-btn:hover{background:#0f4ab8;transform:scale(1.01);}
        .alt-download{font-size:0.9rem;color:#5c6f8c;margin-bottom:20px;}
        .alt-download a{color:#1e5fd9;text-decoration:none;font-weight:500;}

        /* 极简安装步骤 (3-4步) */
        .install-steps{margin-top:8px;border-top:1px dashed #d7e2f5;padding-top:18px;}
        .install-steps p{font-weight:600;margin-bottom:10px;color:#1f3a5e;}
        .step-list{list-style:none;}
        .step-list li{display:flex;align-items:center;gap:12px;margin-bottom:12px;color:#2e4b6e;}
        .step-num-sm{width:26px;height:26px;background:#1e5fd9;color:white;border-radius:20px;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:0.9rem;}

        /* 常见问题精简区域 (只放2-3个) */
        .faq-mini{background:#ffffffd6;backdrop-filter:blur(4px);border-radius:28px;padding:28px 32px;margin:30px 0 50px;border:1px solid #e1e9f5;}
        .faq-mini h3{font-size:1.8rem;font-weight:650;margin-bottom:20px;display:flex;align-items:center;gap:10px;}
        .faq-item{margin-bottom:18px;border-bottom:1px solid #e9eef6;padding-bottom:16px;}
        .faq-item summary{font-weight:650;font-size:1.1rem;color:#1e3a5f;cursor:pointer;list-style:'➕ ';}
        .faq-item[open] summary{list-style:'➖ ';color:#1e5fd9;}
        .faq-item p{margin-top:12px;color:#3f5e7e;padding-left:20px;}

        /* 底部 */
        .footer{margin-top:40px;padding:28px 0;border-top:1px solid rgba(0,0,0,0.05);color:#5c6f8c;display:flex;justify-content:space-between;font-size:0.9rem;flex-wrap:wrap;}

        /* 固定下载按钮 */
        .fixed-download{position:fixed;bottom:30px;right:30px;z-index:999;background:#1e5fd9;color:white;width:64px;height:64px;border-radius:40px;display:flex;align-items:center;justify-content:center;box-shadow:0 12px 28px rgba(30,95,217,0.4);text-decoration:none;font-size:28px;font-weight:700;transition:0.2s;}
        .fixed-download:hover{transform:scale(1.08);background:#0f4ab8;}

        @media (max-width:720px){
            .nav-bar{flex-direction:column;gap:15px;}
            .nav-links{gap:18px;flex-wrap:wrap;justify-content:center;}
            .page-header h1{font-size:2rem;}
            .platform-grid{grid-template-columns:1fr;}
            .footer{flex-direction:column;gap:15px;}
        }