/* 蔚蓝 · TUN决策风格 (与首页蓝色基调一致) */
        *{margin:0;padding:0;box-sizing:border-box;}
        body{
            font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            background:#f5faff; color:#1a2a3a; line-height:1.5;
        }
        @import url('https://fonts.googleapis.com/css2?family=Inter:opsz,wght@14..32,400;14..32,500;14..32,600;14..32,700&display=swap');
        .container{max-width:1280px; margin:0 auto; padding:0 24px;}
        
        /* 导航 — 蓝色基调 */
        .navbar{
            background:rgba(255,255,255,0.96); box-shadow:0 2px 12px rgba(0,70,120,0.04);
            position:sticky; top:0; z-index:50; border-bottom:1px solid #c2d9f0;
            backdrop-filter: blur(4px);
        }
        .nav-flex{display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; padding:0.7rem 0;}
        .logo-area{display:flex; align-items:center; gap:10px;}
        .logo-icon{background:#1a73e8; width:38px; height:38px; border-radius:14px; display:flex; align-items:center; justify-content:center; color:white; font-weight:700; font-size:20px; box-shadow:0 4px 8px rgba(26,115,232,0.15);}
        .logo-text{font-size:1.6rem; font-weight:700; color:#0b3b66; letter-spacing:-0.3px;}
        .nav-links{display:flex; gap:22px; align-items:center; flex-wrap:wrap;}
        .nav-links a{text-decoration:none; font-weight:550; color:#1e4460; transition:all 0.15s; font-size:0.98rem; padding:6px 0; border-bottom:2px solid transparent;}
        .nav-links a:hover, .nav-links a.active{color:#1a73e8; border-bottom-color:#1a73e8;}
        
        .page-header{padding:2.5rem 0 1.5rem; text-align:center; background:linear-gradient(105deg, #f2f8ff 0%, #ffffff 100%);}
        .page-header h1{font-size:2.8rem; font-weight:800; color:#0a3360; margin-bottom:0.5rem;}
        .section-title{font-size:2rem; font-weight:700; color:#0a3360; margin:2rem 0 1.2rem;}
        
        /* 对比卡片 */
        .compare-grid{display:grid; grid-template-columns:1fr 1fr; gap:24px; margin:2rem 0;}
        .compare-card{background:white; border-radius:28px; padding:2rem; border:1px solid #d0e1f5; box-shadow:0 8px 18px rgba(0,0,0,0.02);}
        .compare-card h3{font-size:1.8rem; margin-bottom:1.2rem; color:#0a3360; display:flex; align-items:center; gap:10px;}
        .compare-list{list-style:none;}
        .compare-list li{margin-bottom:1rem; display:flex; align-items:center; gap:10px; font-size:1.05rem;}
        .compare-list i.fa-check{color:#1a73e8;}
        .compare-list i.fa-times{color:#c5221f;}
        .highlight-tun{background:#e3f0ff; border-radius:18px; padding:1.5rem; margin-top:1.5rem;}
        
        /* 场景选择器 (创新) */
        .scene-selector{background:white; border-radius:32px; padding:2.2rem; border:1px solid #d0e1f5; margin:2rem 0;}
        .scene-options{display:flex; gap:20px; margin:1.8rem 0; flex-wrap:wrap;}
        .scene-card{flex:1; background:#f5faff; border-radius:24px; padding:1.8rem; border:2px solid transparent; cursor:pointer; transition:all 0.2s; min-width:180px;}
        .scene-card.active{border-color:#1a73e8; background:#ffffff; box-shadow:0 12px 24px -10px rgba(26,115,232,0.2);}
        .scene-card i{font-size:2.2rem; color:#1a73e8; margin-bottom:1rem;}
        .scene-card h4{font-size:1.4rem; margin-bottom:0.5rem; color:#0a3360;}
        .scene-card p{color:#34608a;}
        .scene-result{background:#ecf5fe; border-radius:20px; padding:1.5rem; margin-top:1.5rem;}
        .btn-scene{background:#1a73e8; color:white; border:none; padding:14px 28px; border-radius:60px; font-weight:700; font-size:1rem; cursor:pointer;}
        
        /* 开启步骤 */
        .steps-tun{display:grid; grid-template-columns:repeat(3,1fr); gap:20px; margin:2rem 0;}
        .step-tun{background:white; border-radius:24px; padding:1.8rem; border:1px solid #d0e1f5;}
        .step-num{background:#1a73e8; width:40px; height:40px; border-radius:14px; display:flex; align-items:center; justify-content:center; color:white; font-weight:700; margin-bottom:1.2rem;}
        
        /* 底部号召 */
        .cta-download{background:#0a3360; border-radius:3rem; padding:2.2rem 2.8rem; margin:3rem 0; color:white; display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap;}
        .cta-btn{background:#f5c542; color:#0a2d4a; padding:16px 38px; border-radius:60px; font-weight:800; text-decoration:none; font-size:1.2rem;}
        
        /* footer */
        .footer{background:#e2edf7; color:#1b3f60; padding:2.8rem 0; margin-top:4rem; border-top:1px solid #b8cee8;}
        .footer-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:2rem; padding-bottom:2rem; border-bottom:1px solid #b1c6e0;}
        .footer a{color:#1b4a70; text-decoration:none;}
        .sitemap-row{margin-top:2rem; text-align:center;}
        
        @media (max-width:800px){
            .compare-grid{grid-template-columns:1fr;}
            .steps-tun{grid-template-columns:1fr;}
        }
        .fa-arrow-right{transition:transform 0.2s;}