:
root { --primary-color: #0052cc; --text-color: #333; --bg-
light: #f8fbff; --accent: #007bff; }
        * { box-sizing: border
-box; margin: 0; padding: 0; }
        body { font-family: 'Segoe
 UI', Roboto, Helvetica, Arial, sans-serif; line-height: 1.6; color: var(--text-
color); background: #fff; }
        .container { max-width: 1200px;
 margin: 0 auto; padding: 0 20px; }
        header { background: #fff;
 padding: 20px 0; border-bottom: 1px solid #eee; 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: #555; font-weight
: 500; transition: 0.3s; }
        .nav-links a:hover {
 color: var(--primary-color); }
        .hero { padding: 80px 0; text
-align: center; background: linear-gradient(135deg, #f0f7ff 0
%, #e6efff 100%); }
        h1 { font-size: 2.5
rem; color: #1a1a1a; margin-bottom: 20px; }
        .btn
 { display: inline-block; padding: 12px 30px; background: var(--primary-
color); color: #fff; border-radius: 6px; text-decoration: none; margin: 10px;
 transition: transform 0.2s; }
        .btn:hover { transform: translateY(-2px); }

        .section { padding: 60px 0; }
        .grid { display: grid; grid
-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 3
0px; }
        .card { padding: 30px; border-radius: 12px; background: #
fff; border: 1px solid #eee; transition: 0.3s; }
        .card:hover { box-
shadow: 0 10px 20px rgba(0,0,0,0.05); }
        
table { width: 100%; border-collapse: collapse; margin: 20px 0; }
        th,
 td { padding: 15px; border: 1px solid #eee; text-align: left; }
        .faq
-item { margin-bottom: 15px; }
        .faq-question { background: #f
4f4f4; padding: 15px; cursor: pointer; border-radius: 6px; font-
weight: bold; }
        .faq-answer { padding: 15px; display: none; }
        footer {
 background: #1a1a1a; color: #ccc; padding: 40px 0; text-
align: center; }
        .float-kefu { position: fixed; bottom: 30px; right:
 30px; z-index: 999; }