/* ============ 顶部信息条 ============ */
.topbar { background: var(--c-dark); color: #cfd8e3; font-size: 12px; }
.topbar .container { display: flex; align-items: center; justify-content: space-between; height: 34px; }
.topbar a { color: #cfd8e3; }
.topbar a:hover { color: #fff; }
.topbar .left span { margin-right: 18px; }
.topbar .right a { margin-left: 14px; }

/* ============ 站点头 ============ */
.header { background: #fff; }
.header .container { display: flex; align-items: center; justify-content: space-between; height: 104px; }
.brand { display: flex; align-items: center; gap: 14px; }
.brand .logo { width: 64px; height: 64px; border-radius: 50%; background: var(--c-primary); color: #fff; display: flex; align-items: center; justify-content: center; font-family: var(--font-serif); font-size: 26px; flex-shrink: 0; box-shadow: 0 2px 8px rgba(176, 28, 46, .25); }
.brand .name { font-family: var(--font-serif); font-size: 26px; color: var(--c-dark); letter-spacing: 2px; line-height: 1.2; }
.brand .slogan { font-size: 12px; color: var(--c-text-3); letter-spacing: 1px; margin-top: 4px; }
.header-search { display: flex; border: 2px solid var(--c-primary); border-radius: var(--radius); overflow: hidden; }
.header-search input { width: 220px; padding: 8px 12px; border: 0; background: #fff; }
.header-search button { padding: 0 16px; background: var(--c-primary); color: #fff; border: 0; cursor: pointer; font-size: 13px; }

/* ============ 主导航 ============ */
.mainnav { background: var(--c-primary); }
.mainnav .container { position: relative; }
.mainnav ul { display: flex; }
.mainnav li { position: relative; }
.mainnav > .container > ul > li > a {
  display: block; padding: 0 26px; height: 48px; line-height: 48px; color: #fff;
  font-size: 16px; letter-spacing: 1px;
}
.mainnav > .container > ul > li > a:hover,
.mainnav > .container > ul > li.active > a { background: var(--c-primary-d); color: #fff; }
.mainnav > .container > ul > li.active > a::after {
  content: ""; position: absolute; left: 26px; right: 26px; bottom: 0; height: 3px; background: var(--c-gold);
}
/* 下拉 */
.mainnav .submenu { position: absolute; top: 48px; left: 0; min-width: 168px; background: #fff;
  box-shadow: var(--shadow-hover); padding: 6px 0; z-index: 50; display: none; }
.mainnav li:hover .submenu { display: block; }
.mainnav .submenu a { display: block; padding: 9px 18px; color: var(--c-text); font-size: 13px; white-space: nowrap; }
.mainnav .submenu a:hover { background: var(--c-primary-l); color: var(--c-primary); }
/* 移动端菜单按钮 */
.nav-toggle { display: none; }

/* ============ 页脚 ============ */
.footer { background: var(--c-dark); color: #b9c4d2; padding: 40px 0 0; margin-top: 50px; }
.footer .grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 30px; padding-bottom: 30px; }
.footer h4 { color: #fff; font-size: 15px; margin-bottom: 14px; }
.footer p, .footer li { font-size: 13px; line-height: 2; color: #b9c4d2; }
.footer .brand .name { color: #fff; font-size: 20px; }
.footer .brand .logo { width: 52px; height: 52px; font-size: 22px; }
.footer .links a { display: inline-block; margin-right: 14px; color: #b9c4d2; }
.footer .links a:hover { color: #fff; }
.footer .qr { text-align: center; }
.footer .qr .qr-img { width: 96px; height: 96px; background: #fff; border-radius: 6px; margin: 0 auto 8px; display: flex; align-items: center; justify-content: center; color: var(--c-text-3); font-size: 11px; }
.footer .copyright { border-top: 1px solid rgba(255, 255, 255, .1); padding: 16px 0; font-size: 12px; text-align: center; color: #8a97a8; }
.footer .copyright a { color: #8a97a8; margin: 0 8px; }

/* ============ 响应式 ============ */
@media (max-width: 980px) {
  .header .container { height: auto; padding: 12px 16px; flex-wrap: wrap; gap: 10px; }
  .brand .name { font-size: 20px; }
  .header-search { display: none; }
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px;
    background: var(--c-primary); color: #fff; border: 0; border-radius: var(--radius); cursor: pointer; font-size: 22px; }
  .mainnav .container { padding: 0; }
  .mainnav ul { display: none; flex-direction: column; width: 100%; }
  .mainnav.open ul { display: flex; }
  .mainnav > .container > ul > li > a { padding: 0 20px; height: 44px; line-height: 44px; font-size: 15px; }
  .mainnav > .container > ul > li.active > a::after { display: none; }
  .mainnav .submenu { position: static; display: block; box-shadow: none; background: var(--c-primary-d); padding: 0; }
  .mainnav .submenu a { color: #fff; padding-left: 38px; }
  .mainnav li:hover .submenu { display: block; }
  .footer .grid { grid-template-columns: 1fr; gap: 24px; }
  .section { padding: 24px 0; }
  .section-title { font-size: 19px; }
}