:root { --primary: #ff
4757; --secondary: #2f3542; --bg: #ffffff; --text
: #333; --accent: #ffa502; }
        * { box-sizing: border
-box; margin: 0; padding: 0; }
        body { font-family: 'PingFang SC',
 sans-serif; line-height: 1.6; color: var(--text); background: var(--bg); }
        
.container { max-width: 1200px; margin: 0 auto; padding: 0
 20px; }
        header { padding: 20px 0; display: flex; justify-content
: space-between; align-items: center; background: #fff; box-shadow: 0 2px 5
px rgba(0,0,0,0.05); }
        .nav-links { display: flex; gap
: 0; }
        .nav-links a { padding: 10px 15px;
 color: var(--secondary); text-decoration: none; font-weight: 500; }
        .hero { padding
: 100px 0; text-align: center; background: linear-gradient(135deg, #f
8f9fa 0%, #e9ecef 100%); }
        h1 { font
-size: 3rem; margin-bottom: 20px; color: var(--secondary); }

        .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; background: #fff; border: 1px solid #
eee; border-radius: 10px; transition: 0.3s; }
        .card
:hover { box-shadow: 0 10px 30px rgba(0,0,0,0.
1); transform: translateY(-5px); }
        table { width: 100%; border-collapse
: collapse; margin-top: 20px; }
        th, td { border: 1px solid #ddd
; padding: 12px; text-align: left; }
        .faq-item { margin-bottom: 1
5px; }
        .faq-q { font-weight: bold; cursor: pointer; padding: 
15px; background: #f1f2f6; border-radius: 5px; }

        footer { padding: 40px 0; background: var(--secondary); color: #fff; text
-align: center; }
        footer a { color: #fff; text-decoration: none; margin: 0 
10px; }
        .float-kefu { position: fixed; right: 20px;
 bottom: 50px; z-index: 100; }