* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --primary: #0F2A4A;
  --accent: #3B82F6;
  --gold: #C9A227;
  --bg: #F5F7FA;
  --card: #FFFFFF;
  --text: #1F2937;
  --muted: #6B7280;
  --radius: 8px;
  --shadow: 0 4px 16px rgba(15,42,74,0.08);
}
body {
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* 导航 */
.navbar { background: var(--primary); color: #fff; position: sticky; top: 0; z-index: 10; }
.navbar .wrap { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { color: #fff; font-size: 20px; font-weight: 700; letter-spacing: 1px; }
.brand:hover { text-decoration: none; }
.nav-links { display: flex; gap: 24px; }
.nav-links a { color: #d9e2ee; font-size: 15px; padding: 6px 0; border-bottom: 2px solid transparent; }
.nav-links a:hover { color: #fff; text-decoration: none; }
.nav-links a.active { color: #fff; border-bottom-color: var(--gold); }
.nav-toggle { display: none; background: none; border: 0; color: #fff; font-size: 24px; cursor: pointer; }

/* 按钮 */
.btn { display: inline-block; padding: 10px 24px; border-radius: 6px; font-size: 15px; font-weight: 600; cursor: pointer; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: #1b3a63; text-decoration: none; }
.btn-outline { border: 1px solid var(--gold); color: var(--gold); }
.btn-outline:hover { background: rgba(201,162,39,0.1); text-decoration: none; }

/* Hero */
.hero { background: var(--primary); color: #fff; padding: 72px 0 60px; }
.hero .tagline { display: inline-block; background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.25); color: #f0c75e; font-size: 13px; padding: 3px 12px; border-radius: 999px; margin-bottom: 18px; letter-spacing: 1px; }
.hero h1 { font-size: 36px; line-height: 1.35; margin-bottom: 16px; letter-spacing: 1px; }
.hero p { font-size: 17px; color: #d9e2ee; max-width: 760px; margin-bottom: 28px; }
.hero .btn-primary { background: var(--gold); color: var(--primary); }
.hero .btn-primary:hover { background: #d9b13a; }
.hero .btn-outline { border-color: rgba(255,255,255,0.6); color: #fff; }
.hero .btn-outline:hover { background: rgba(255,255,255,0.1); }

/* 区块与卡片 */
.section { padding: 56px 0; }
.section.alt { background: var(--card); }
.section h2 { font-size: 26px; margin-bottom: 12px; letter-spacing: 1px; }
.section .lead { color: var(--muted); margin-bottom: 32px; max-width: 720px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }
.card { background: var(--card); border: 1px solid #e5e9ef; border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
.card h3 { font-size: 18px; margin: 12px 0 8px; }
.card p { font-size: 14px; color: var(--muted); }
.icon-badge { width: 44px; height: 44px; border-radius: 10px; background: rgba(59,130,246,0.1); display: flex; align-items: center; justify-content: center; font-size: 22px; }
.badge { display: inline-block; background: #eef4ff; color: var(--accent); font-size: 12px; padding: 2px 10px; border-radius: 999px; }

/* 页脚 */
.footer { background: var(--primary); color: #b9c3d0; padding: 36px 0 30px; margin-top: 40px; font-size: 13px; }
.footer .wrap { display: flex; flex-wrap: wrap; gap: 20px; justify-content: space-between; }
.footer a { color: #f0c75e; }
.footer .legal { text-align: center; width: 100%; margin-top: 18px; color: #8a94a3; }

@media (max-width: 760px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .nav-links { display: none; position: absolute; top: 60px; left: 0; right: 0; background: var(--primary); flex-direction: column; padding: 16px 24px; gap: 12px; }
  .navbar.nav-open .nav-links { display: flex; }
  .nav-toggle { display: block; }
  .hero h1 { font-size: 28px; }
}