:root { --primary: #ff
3e3e; --secondary: #2563eb; --dark: #1e293b; --light
: #f8fafc; }
        * { box-sizing: border-box; margin: 0; padding
: 0; }
        body { font-family: 'PingFang SC', sans-serif; line-height: 1
.6; color: var(--dark); background: #ffffff; }
        .container { max-width: 12
00px; margin: 0 auto; padding: 0 20px; }
        header { padding
: 20px 0; border-bottom: 1px solid #e2e8f0; display: flex
; justify-content: space-between; align-items: center; }
        .logo-box { width
: 150px; }
        .nav-links { display: flex; gap: 0; align-items:
 center; }
        .nav-links a { padding: 10px 15px; text-decoration: none; color
: var(--dark); font-weight: 500; transition: color 0.3s; }
        .hero {
 padding: 80px 0; text-align: center; background: linear-gradient(135deg, #fff
5f5, #f0f7ff); }
        .hero h1 { font-size: 3rem; margin
-bottom: 20px; color: var(--primary); }
        .btn { display: inline-block
; padding: 12px 30px; background: var(--primary); color: #fff; border
-radius: 50px; text-decoration: none; margin: 10px; transition: transform
 0.2s; }
        .section { padding: 60px 0; }
        .grid { display
: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr
)); gap: 30px; }
        .card { padding: 30px; border: 1px solid #e
2e8f0; border-radius: 12px; transition: all 0.3s;
 background: #fff; }
        .card:hover { transform: translateY(-5px); box-shadow: 0
 10px 20px rgba(0,0,0,0.1); }
        table
 { width: 100%; border-collapse: collapse; margin-top: 20px; }
        
th, td { padding: 15px; border: 1px solid #e2e8f0;
 text-align: left; }
        .faq-item { margin-bottom: 10px; border-bottom
: 1px solid #e2e8f0; }
        .footer { padding: 40px 0; background
: var(--dark); color: #fff; text-align: center; }
        .footer a { color: #cbd
5e1; }
        .float-kefu { position: fixed; right: 20px;
 bottom: 50px; z-index: 100; }