/* 基础变量 */
:root {
  --primary: #005598;
  --primary-dark: #004a78;
  --text: #1f2d3d;
  --muted: #6b7a90;
  --bg: #ffffff;
  --line: #e6ebf1;
}

/* Reset */
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  color: var(--text);
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Noto Sans", "Liberation Sans", sans-serif;
  background: #fff;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
button { font: inherit; border: 0; background: none; cursor: pointer; }
input, button { outline: none; }

.container {
  width: 1200px;
  margin: 0 auto;
}

/* 通用按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 20px;
  height: 40px;
  border-radius: 8px;
  white-space: nowrap;
  transition: all .2s ease;
}
.btn-lg { height: 48px; padding: 0 28px; font-size: 16px; }
.btn-primary { color: #fff; background: var(--primary); box-shadow: 0 8px 20px rgba(30,123,255,0.25); }
.btn-primary:hover { background: var(--primary-dark); }
.btn-outline { color: var(--primary); background: #fff; border: 1px solid var(--primary); }
.btn-outline:hover { background: rgba(30,123,255,0.06); }
.btn-ghost { color: #4a5b78; background: #f4f6fb; }
.btn-ghost:hover { background: #eaeef7; }
.btn i { margin-right: 6px; }

/* ==================== 顶部导航 ==================== */
.topbar {
  background: #fff;
  border-bottom: 1px solid var(--line);
}
.topbar-inner {
  height: 72px;
  display: flex;
  align-items: center;
}
.logo img { height: 44px; }
.main-nav { margin-left: 40px; }
.main-nav ul { display: flex; gap: 72px; }
.main-nav a {
  display: inline-block;
  padding: 8px 0;
  color: #3a4b66;
  font-size: 16px;
}
.main-nav a.active {
  color: var(--primary);
  position: relative;
}
.main-nav a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -14px;
  height: 3px; border-radius: 3px;
  background: var(--primary);
}

/* ==================== Footer 底部 ==================== */
.footer { background: #ffffff; border-top: 1px solid #eef2f7; }
.footer-top {
  display: grid;
  grid-template-columns: 1.6fr 1.4fr 1fr 1fr 1fr;
  align-items: start;
  gap: 0;
}
.footer-top .col { padding: 22px 24px; border-right: 1px solid #eef2f7; min-height: 154px; }
.footer-top .col.no-border { border-right: 0; }
.footer .brand img { width: 160px; margin-bottom: 10px; }
.footer .company { font-weight: 700; color: #2b3f6b; margin-bottom: 4px; }
.footer .addr { color: #8899b2; font-size: 13px; }
.footer .hotline { text-align: center; }
.footer .phone { color: #e34535; font-size: 26px; font-weight: 700; letter-spacing: 1px; margin-bottom: 10px; }
.footer .qr { width: 96px; height: 96px; margin: 0 auto; display: block; border: 1px solid #e5e9f2; padding: 6px; background: #fff; object-fit: contain; }
.footer .links .ft-title { font-weight: 700; color: #2b3f6b; margin-bottom: 10px; }
.footer .links a { display: block; color: #8899b2; line-height: 26px; font-size: 14px; }
.footer-bottom { text-align: center; color: #98a6bd; font-size: 12px; padding: 14px 0 24px; border-top: 1px solid #f0f3f8; }

/* ==================== 响应式 ==================== */
@media (max-width: 1260px) {
  .container { width: 92%; }
}