/* 轻盈·原生风格，与首页/教程/FAQ 完全一致 */
        *{margin:0;padding:0;box-sizing:border-box;}
        body{
            font-family:'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
            background:#fefefe; color:#1e293b; 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;}
        .navbar{
            background:rgba(255,255,255,0.98); box-shadow:0 1px 0 #eef2f6;
            position:sticky; top:0; z-index:50; border-bottom:2px solid #e0f2e9;
        }
        .nav-flex{display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; padding:0.8rem 0;}
        .logo-area{display:flex; align-items:center; gap:8px;}
        .logo-icon{background:#10b981; width:36px; height:36px; border-radius:12px; display:flex; align-items:center; justify-content:center; color:white; font-weight:700; font-size:20px; box-shadow:0 2px 6px rgba(16,185,129,0.2);}
        .logo-text{font-size:1.5rem; font-weight:700; color:#0f3b2c; letter-spacing:-0.3px;}
        .nav-links{display:flex; gap:24px; align-items:center; flex-wrap:wrap;}
        .nav-links a{text-decoration:none; font-weight:500; color:#334155; transition:color 0.2s; font-size:1rem;}
        .nav-links a:hover, .nav-links a.active{color:#10b981;}
        .page-header{padding:2.5rem 0 1.5rem; text-align:center; background:linear-gradient(105deg, #f6fef9 0%, #ffffff 100%);}
        .page-header h1{font-size:2.4rem; font-weight:800; color:#0c4a3a; margin-bottom:0.5rem;}
        .btn-primary{background:#10b981; color:white; padding:12px 28px; border-radius:44px; font-weight:600; text-decoration:none; display:inline-flex; align-items:center; gap:8px; transition:0.2s;}
        .btn-primary:hover{background:#059669; transform:translateY(-2px);}
        .btn-outline{background:white; border:1px solid #cbd5e1; padding:12px 28px; border-radius:44px; font-weight:600; text-decoration:none; color:#2c5f4a; display:inline-flex; align-items:center; gap:8px;}
        .footer{background:#f0fdf4; color:#2c5f4a; padding:2.5rem 0; margin-top:4rem; border-top:1px solid #d4eadf;}
        .section-title{font-size:2rem; font-weight:700; color:#0f3b2c; margin:2rem 0 1rem;}
        .branch-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:1.8rem; margin:2rem 0;}
        .branch-card{background:white; border-radius:2rem; padding:2rem 1.5rem; border:1px solid #e2f0e8; transition:0.2s; box-shadow:0 5px 20px rgba(0,0,0,0.02);}
        .branch-card:hover{border-color:#10b981;}
        .branch-icon{font-size:2.8rem; margin-bottom:1rem;}
        .branch-card h3{font-size:1.5rem; margin-bottom:1rem; color:#0f3b2c;}
        .probability-bar{background:#f1f9f4; border-radius:1rem; padding:1rem; margin:1.5rem 0;}
        .prob-item{display:flex; justify-content:space-between; margin-bottom:0.5rem;}
        .prob-fill{height:8px; background:#10b981; border-radius:4px; margin-bottom:0.8rem;}
        .solution-step{background:#f9fffc; border-radius:1.5rem; padding:1.8rem; margin:2rem 0; border:1px solid #d0eae0;}
        .step-item{display:flex; gap:1rem; margin-bottom:1.2rem;}
        .step-num{background:#10b981; color:white; width:28px; height:28px; border-radius:8px; display:flex; align-items:center; justify-content:center; font-weight:700; flex-shrink:0;}
        .expected-result{background:#e6f7ef; padding:0.8rem 1.2rem; border-radius:1rem; margin-top:0.8rem; font-size:0.95rem;}
        .fallback-box{background:#fff5e6; border-left:4px solid #f59e0b; padding:1.5rem; border-radius:1.2rem; margin:2rem 0;}
        .extend-links{display:flex; flex-wrap:wrap; gap:1rem; margin:2rem 0;}
        .extend-link{background:white; padding:0.8rem 1.5rem; border-radius:40px; border:1px solid #cbd5e1; text-decoration:none; color:#2c5f4a;}
        .cta-banner{background:linear-gradient(105deg, #dcfce7 0%, #e6f7ef 100%); border-radius:2rem; padding:2rem; display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:1.5rem; margin:3rem 0 1rem;}
        @media (max-width:800px){
            .branch-grid{grid-template-columns:1fr;}
            .page-header h1{font-size:1.8rem;}
        }