:root { --primary: #2563eb; --accent: #f59e0b; --dark: #1e293b; --light: #f8fafc; }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif; color: #334155; line-height: 1.6; background-color: #ffffff; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        header { background: #fff; padding: 15px 0; border-bottom: 1px solid #e2e8f0; position: sticky; top: 0; z-index: 1000; }
        .nav-wrapper { display: flex; justify-content: space-between; align-items: center; }
        .nav-links { display: flex; gap: 0; align-items: center; }
        .nav-links a { padding: 10px 15px; text-decoration: none; color: #475569; font-weight: 500; }
        .hero { padding: 80px 0; text-align: center; background: linear-gradient(135deg, #eff6ff 0%, #f1f5f9 100%); }
        .hero h1 { font-size: 3rem; margin-bottom: 20px; color: #0f172a; }
        .btn { display: inline-block; padding: 12px 30px; background: var(--primary); color: #fff; border-radius: 8px; text-decoration: none; transition: 0.3s; }
        .btn:hover { background: #1d4ed8; transform: translateY(-2px); }
        .section { padding: 60px 0; }
        .grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
        .card { padding: 25px; border: 1px solid #e2e8f0; border-radius: 12px; transition: 0.3s; }
        .card:hover { box-shadow: 0 10px 25px rgba(0,0,0,0.05); }
        table { width: 100%; border-collapse: collapse; margin-top: 20px; }
        th, td { padding: 12px; border: 1px solid #e2e8f0; text-align: left; }
        footer { background: #0f172a; color: #94a3b8; padding: 40px 0; text-align: center; }