:root { --
primary-color: #2563eb; --text-color: #1e293b; --bg
-color: #f8fafc; }
        body { font-family: 'PingFang SC', 'Microsoft YaHei', sans
-serif; color: var(--text-color); background: var(--bg-color); margin: 0; line-
height: 1.6; }
        .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 { display: flex; justify-content
: space-between; align-items: center; }
        .nav-links { display: flex; gap
: 0; }
        .nav-links a { text-decoration: none; color: #4755
69; padding: 10px 15px; font-weight: 500; }

        .hero { padding: 80px 0; text-align: center; background: linear-gradient(1
35deg, #eff6ff 0%, #f1f5f9 100%); }
        h
1 { font-size: 2.5rem; margin-bottom: 20px; color: #0
f172a; }
        .btn { display: inline-block; padding: 12px 30
px; background: var(--primary-color); color: #fff; text-decoration: none; border-radius: 8px
; transition: 0.3s; }
        .btn:hover { background: #1d4ed8; transform
: translateY(-2px); }
        .section { padding: 60px 0; }
        .grid {
 display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr
)); gap: 30px; }
        .card { background: #fff; padding: 25px; border
-radius: 16px; box-shadow: 0 4px 6px -1px rgba
(0,0,0,0.1); }
        .table-responsive { overflow-x: auto; }

        table { width: 100%; border-collapse: collapse; margin-top: 20
px; }
        th, td { border: 1px solid #e2e8f0; padding: 12
px; text-align: left; }
        footer { background: #0f172a; color: #9
4a3b8; padding: 40px 0; text-align: center; }
        .feedback
-form input, .feedback-form select, .feedback-form textarea { width: 100%; padding: 10px
; margin: 10px 0; border: 1px solid #cbd5e1; border-radius
: 4px; }
        .float-kefu { position: fixed; right: 20px; bottom:
 50px; z-index: 999; }