:root { --primary: #ff
4757; --accent: #2ed573; --dark: #2f3542
; --light: #f1f2f6; }
        * { 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:
 1200px; margin: 0 auto; padding: 0 20px; }

        header { background: #fff; padding: 15px 0; border-bottom: 1px
 solid #eee; position: sticky; top: 0; z-index: 1000; }
        nav {
 display: flex; align-items: center; justify-content: space-between; }
        .nav-links { display: flex
; align-items: center; gap: 0; }
        .nav-links a { padding: 0
 15px; text-decoration: none; color: var(--dark); font-weight: 50
0; }
        .hero { padding: 80px 0; text-align: center; background
: linear-gradient(135deg, #f8f9fa, #e9ecef); }
        
.hero h1 { font-size: 3rem; margin-bottom: 20px; color: var(--
dark); }
        .btn { display: inline-block; padding: 12px 30px;
 background: var(--primary); color: #fff; border-radius: 5px; text-decoration: none
; font-weight: bold; transition: 0.3s; }
        .btn:hover { background: #
ff6b81; }
        section { padding: 60px 0; }
        .grid
 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr
)); gap: 30px; }
        .card { padding: 30px; border: 1px solid #eee
; border-radius: 10px; transition: 0.3s; }
        .card:hover {
 box-shadow: 0 10px 20px rgba(0,0,0,0.1); }
        
footer { background: var(--dark); color: #fff; padding: 40px 0; text-align: center; }

        .faq-item { margin-bottom: 15px; border-bottom: 1px solid #
444; padding-bottom: 10px; }
        table { width: 100%; border-collapse:
 collapse; margin: 20px 0; }
        th, td { border: 1px solid #eee; padding
: 12px; text-align: left; }
        .float-kefu { position: fixed; bottom: 
20px; right: 20px; z-index: 999; }