* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, "Microsoft YaHei", "PingFang SC", sans-serif; color: #333; line-height: 1.8; }
a { color: #2563eb; text-decoration: none; }
a:hover { text-decoration: underline; }
.navbar { background: #1a1a2e; padding: 0 40px; position: sticky; top: 0; z-index: 100; box-shadow: 0 2px 10px rgba(0,0,0,0.3); }
.navbar .nav-inner { max-width: 1100px; margin: 0 auto; display: flex; align-items: center; height: 64px; }
.navbar .logo { color: #fff; font-size: 18px; font-weight: 700; margin-right: auto; }
.navbar .logo span { color: #60a5fa; }
.navbar nav { display: flex; gap: 4px; }
.navbar nav a { color: #cbd5e1; padding: 8px 18px; border-radius: 6px; font-size: 15px; transition: all 0.2s; }
.navbar nav a:hover { background: rgba(255,255,255,0.1); color: #fff; text-decoration: none; }
.navbar nav a.active { background: #2563eb; color: #fff; }
.hero { background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%); color: #fff; text-align: center; padding: 80px 20px 60px; }
.hero h1 { font-size: 36px; font-weight: 700; margin-bottom: 12px; letter-spacing: 2px; }
.hero p { font-size: 18px; color: #94a3b8; letter-spacing: 1px; }
.section { padding: 70px 20px; }
.bg-light { background: #f8fafc; }
.container { max-width: 960px; margin: 0 auto; }
.section-title { font-size: 26px; color: #1a1a2e; margin-bottom: 40px; text-align: center; position: relative; }
.section-title::after { content: ''; display: block; width: 60px; height: 3px; background: #2563eb; margin: 14px auto 0; border-radius: 2px; }
.about-text { font-size: 16px; color: #475569; margin-bottom: 20px; text-align: justify; }
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 24px; }
.card { background: #fff; border-radius: 12px; padding: 32px 24px; text-align: center; box-shadow: 0 2px 12px rgba(0,0,0,0.06); transition: transform 0.2s, box-shadow 0.2s; }
.card:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(0,0,0,0.1); }
.card-icon { font-size: 40px; margin-bottom: 16px; }
.card h3 { font-size: 17px; color: #1a1a2e; margin-bottom: 10px; }
.card p { font-size: 14px; color: #64748b; }
.feature-list { display: flex; flex-direction: column; gap: 20px; }
.feature-item { display: flex; gap: 20px; background: #fff; border-radius: 10px; padding: 24px; box-shadow: 0 2px 8px rgba(0,0,0,0.05); }
.feature-icon { font-size: 32px; flex-shrink: 0; width: 56px; height: 56px; background: #eff6ff; border-radius: 50%; display: flex; align-items: center; justify-content: center; }
.feature-content h3 { font-size: 16px; color: #1a1a2e; margin-bottom: 6px; }
.feature-content p { font-size: 14px; color: #64748b; }
.requirement-box { background: #fff; border-radius: 12px; padding: 32px 40px; box-shadow: 0 2px 12px rgba(0,0,0,0.06); }
.requirement-list { list-style: none; }
.requirement-list li { font-size: 16px; color: #475569; padding: 10px 0; border-bottom: 1px solid #f1f5f9; display: flex; align-items: center; gap: 12px; }
.requirement-list li:last-child { border-bottom: none; }
.requirement-list li::before { content: '✓'; color: #16a34a; font-weight: 700; flex-shrink: 0; }
.requirement-list li strong { color: #1a1a2e; }
.advantage-list { display: flex; flex-direction: column; gap: 24px; }
.advantage-item { display: flex; gap: 24px; align-items: flex-start; background: #fff; border-radius: 12px; padding: 28px 32px; box-shadow: 0 2px 12px rgba(0,0,0,0.06); }
.advantage-num { font-size: 40px; font-weight: 800; color: #2563eb; opacity: 0.15; flex-shrink: 0; line-height: 1; margin-top: -4px; }
.advantage-body h3 { font-size: 18px; color: #1a1a2e; margin-bottom: 10px; }
.advantage-body p { font-size: 15px; color: #64748b; }
.contact-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; }
.contact-card { background: #fff; border-radius: 12px; padding: 32px 24px; text-align: center; box-shadow: 0 2px 12px rgba(0,0,0,0.06); }
.contact-icon { font-size: 40px; margin-bottom: 16px; }
.contact-card h3 { font-size: 14px; color: #94a3b8; text-transform: uppercase; letter-spacing: 1px; margin-bottom: 10px; }
.contact-card p { font-size: 15px; color: #1a1a2e; font-weight: 500; }
.contact-card a { font-size: 15px; color: #2563eb; font-weight: 600; }
.footer { background: #1a1a2e; color: #94a3b8; text-align: center; padding: 32px 20px; font-size: 13px; }
.footer .beian { margin-bottom: 8px; }
.footer .beian a { color: #94a3b8; }
.footer .beian a:hover { color: #fff; text-decoration: none; }
.footer p { color: #64748b; }
@media (max-width: 768px) {
    .navbar { padding: 0 16px; }
    .navbar nav a { padding: 8px 12px; font-size: 13px; }
    .hero { padding: 50px 20px 40px; }
    .hero h1 { font-size: 26px; }
    .section { padding: 40px 16px; }
    .advantage-item { flex-direction: column; gap: 8px; }
    .advantage-num { font-size: 28px; }
    .feature-item { flex-direction: column; gap: 12px; }
}