:root {
  --primary: #0b3d91;
  --primary-dark: #082a66;
  --accent: #d4a017;
  --text: #222;
  --text-light: #666;
  --bg-light: #f6f8fb;
  --white: #fff;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", Arial, sans-serif;
  color: var(--text);
  line-height: 1.7;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }

.container { max-width: 1140px; margin: 0 auto; padding: 0 24px; }

/* ===== 顶部导航 ===== */
.topbar {
  background: var(--primary-dark);
  color: #cfd8ea;
  font-size: 13px;
}
.topbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 34px;
}

.header {
  background: var(--white);
  box-shadow: 0 2px 8px rgba(0,0,0,.06);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
}
.logo .logo-mark {
  width: 40px; height: 40px;
  background: var(--primary);
  color: #fff;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
}
.nav { display: flex; gap: 36px; }
.nav a {
  font-size: 16px;
  padding: 24px 0;
  border-bottom: 3px solid transparent;
  transition: all .2s;
}
.nav a:hover, .nav a.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}
.lang-switch {
  background: var(--primary);
  color: #fff;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 14px;
}

/* ===== Banner ===== */
.banner {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, #1656b8 100%);
  color: #fff;
  padding: 110px 0;
  text-align: center;
}
.banner h1 { font-size: 44px; margin-bottom: 16px; letter-spacing: 2px; }
.banner p { font-size: 18px; opacity: .85; max-width: 720px; margin: 0 auto; }
.page-banner {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  color: #fff;
  padding: 70px 0;
  text-align: center;
}
.page-banner h1 { font-size: 36px; }
.page-banner p { opacity: .8; margin-top: 8px; }

/* ===== 区块 ===== */
.section { padding: 72px 0; }
.section.alt { background: var(--bg-light); }
.section-title { text-align: center; margin-bottom: 48px; }
.section-title h2 {
  font-size: 30px;
  color: var(--primary);
  display: inline-block;
  padding-bottom: 12px;
  border-bottom: 3px solid var(--accent);
}
.section-title p { color: var(--text-light); margin-top: 10px; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

.card {
  background: var(--white);
  border-radius: 10px;
  padding: 32px 28px;
  box-shadow: 0 2px 12px rgba(0,0,0,.06);
  transition: transform .2s, box-shadow .2s;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 8px 20px rgba(0,0,0,.1); }
.card .icon {
  width: 56px; height: 56px;
  background: var(--bg-light);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 26px;
  margin-bottom: 18px;
}
.card h3 { font-size: 19px; margin-bottom: 10px; color: var(--primary); }
.card p { color: var(--text-light); font-size: 15px; }

/* 数字统计 */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stat .num { font-size: 40px; font-weight: 700; color: var(--primary); }
.stat .label { color: var(--text-light); margin-top: 4px; }

/* 新闻列表 */
.news-item {
  display: flex;
  gap: 24px;
  background: var(--white);
  border-radius: 10px;
  padding: 24px;
  box-shadow: 0 2px 10px rgba(0,0,0,.05);
  margin-bottom: 20px;
}
.news-date {
  min-width: 84px;
  text-align: center;
  background: var(--bg-light);
  border-radius: 8px;
  padding: 12px 8px;
}
.news-date .day { font-size: 26px; font-weight: 700; color: var(--primary); }
.news-date .ym { font-size: 13px; color: var(--text-light); }
.news-item h3 { font-size: 18px; margin-bottom: 6px; }
.news-item p { color: var(--text-light); font-size: 14px; }

/* 联系页 */
.contact-block { display: flex; gap: 16px; margin-bottom: 24px; }
.contact-block .icon {
  width: 48px; height: 48px;
  background: var(--primary);
  color: #fff;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}
.contact-block h3 { font-size: 16px; margin-bottom: 4px; }
.contact-block p { color: var(--text-light); }

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 12px 36px;
  border-radius: 6px;
  font-size: 16px;
  margin-top: 28px;
  transition: opacity .2s;
}
.btn:hover { opacity: .9; }

/* ===== 页脚 ===== */
.footer {
  background: var(--primary-dark);
  color: #aebad0;
  padding: 48px 0 0;
  font-size: 14px;
}
.footer .grid-4 { padding-bottom: 32px; }
.footer h4 { color: #fff; font-size: 16px; margin-bottom: 14px; }
.footer li { margin-bottom: 8px; }
.footer a:hover { color: #fff; }
.copyright {
  border-top: 1px solid rgba(255,255,255,.12);
  text-align: center;
  padding: 18px 0;
  font-size: 13px;
}

@media (max-width: 860px) {
  .grid-3, .grid-4, .grid-2, .stats { grid-template-columns: 1fr 1fr; }
  .nav { display: none; }
  .banner h1 { font-size: 32px; }
}