/* zh-khung.css - giao diện KHUNG DÙNG CHUNG khu /zh/ (header 5 tab + footer). Đợt 1, 07/11/2026.
   Giữ đúng tông màu khu /zh/ (zh-xinhua.css): xanh chủ đạo #024AC2, xanh đậm #0B3D91, nền nhạt #EBF0FA, viền #D9E2F2, chữ #333.
   Font giữ theo khu /zh/: PingFang SC, Microsoft YaHei, Noto Sans SC. */
.zk-head, .zk-foot {
  --zk-b: #024AC2; --zk-bd: #0B3D91; --zk-soft: #EBF0FA; --zk-line: #D9E2F2; --zk-ink: #333; --zk-mut: #666;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--zk-ink); box-sizing: border-box; line-height: 1.4;
}
.zk-head *, .zk-foot * { box-sizing: border-box; }

/* ---------- Header ---------- */
.zk-head { position: sticky; top: 0; z-index: 60; background: #fff; border-bottom: 3px solid var(--zk-b); box-shadow: 0 2px 12px rgba(2, 74, 194, .12); }
.zk-head .zk-in { max-width: 1280px; margin: 0 auto; padding: 0 16px; min-height: 64px; display: flex; align-items: center; gap: 14px; }
.zk-head .zk-logo { flex: 0 0 auto; display: flex; align-items: center; }
.zk-head .zk-logo img { height: 38px; width: auto; display: block; }
.zk-head .zk-tabs { flex: 1 1 auto; display: flex; align-items: stretch; justify-content: center; gap: 4px; min-width: 0; }
.zk-head .zk-tab { display: flex; align-items: center; gap: 6px; padding: 0 12px; min-height: 64px; color: var(--zk-ink) !important; text-decoration: none !important; font-weight: 700; font-size: 15px; white-space: nowrap; border-bottom: 3px solid transparent; margin-bottom: -3px; transition: background .15s, color .15s; }
.zk-head .zk-tab:hover { background: var(--zk-soft); color: var(--zk-bd) !important; }
.zk-head .zk-tab.on { color: var(--zk-b) !important; border-bottom-color: #E8A317; background: var(--zk-soft); }
.zk-head .zk-tab:focus-visible, .zk-head button:focus-visible, .zk-head input:focus-visible { outline: 2px solid var(--zk-b); outline-offset: 2px; }
.zk-head .zk-ic { font-size: 17px; line-height: 1; }
.zk-head .zk-tools { flex: 0 0 auto; display: flex; align-items: center; gap: 8px; }
.zk-head .zk-lang { display: inline-flex; border: 1.5px solid var(--zk-line); border-radius: 999px; overflow: hidden; background: #fff; }
.zk-head .zk-lang button { border: 0; background: transparent; color: var(--zk-b); font-family: inherit; font-weight: 700; font-size: 13px; line-height: 1; padding: 8px 11px; cursor: pointer; white-space: nowrap; }
.zk-head .zk-lang button.on { background: var(--zk-b); color: #fff; }
.zk-head .zk-search { display: flex; align-items: center; border: 1.5px solid var(--zk-line); border-radius: 6px; background: #F7F9FC; overflow: hidden; margin: 0; }
.zk-head .zk-search input { border: 0; background: transparent; outline: none; font-family: inherit; font-size: 14px; line-height: 1.3; color: var(--zk-ink); padding: 8px 10px; width: 170px; min-width: 0; }
.zk-head .zk-search button { border: 0; background: var(--zk-b); color: #fff; padding: 8px 11px; cursor: pointer; font-size: 14px; line-height: 1; }

@media (max-width: 1240px) {
  .zk-head .zk-tab { padding: 0 8px; font-size: 14px; }
  .zk-head .zk-search input { width: 130px; }
}
/* Màn vừa và điện thoại: hàng 1 logo + ngôn ngữ, hàng 2 ô tìm, hàng 3 năm tab chia đều (luôn thấy đủ, không phải mở ☰) */
@media (max-width: 1080px) {
  .zk-head { position: relative; }
  .zk-head .zk-in { flex-wrap: wrap; gap: 8px 10px; padding: 8px 12px 0; min-height: 0; }
  .zk-head .zk-logo img { height: 32px; }
  .zk-head .zk-tools { margin-left: auto; }
  .zk-head .zk-tabs { order: 3; flex: 1 1 100%; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 2px; justify-content: stretch; }
  .zk-head .zk-tab { flex-direction: column; justify-content: center; gap: 3px; min-height: 58px; padding: 6px 2px 7px; font-size: 13px; white-space: normal; text-align: center; line-height: 1.2; border-radius: 6px 6px 0 0; }
  .zk-head .zk-ic { font-size: 18px; }
}
@media (max-width: 640px) {
  .zk-head .zk-tools { flex: 1 1 100%; order: 2; margin-left: 0; }
  .zk-head .zk-search { flex: 1 1 auto; }
  .zk-head .zk-search input { width: 100%; }
  .zk-head .zk-in > .zk-logo { flex: 1 1 100%; justify-content: center; }
  .zk-head .zk-tab { font-size: 11.5px; min-height: 56px; }
  .zk-head .zk-lang button { padding: 8px 9px; font-size: 12.5px; }
}

/* Các thanh sticky cũ của trang bám theo chiều cao khung mới (zh-khung.js đặt --nav-h; điện thoại = 0 vì header không dính) */
body.zh-pro.zk-on .rqx-backbar { top: var(--nav-h, 0px) !important; }
/* Trang năng lượng: thanh lọc dính dưới khung; nút ngôn ngữ trùng ở hero ẩn đi vì khung đã có (giữ nguyên phần tử) */
body.zk-on .nl-bar { top: var(--nav-h, 0px); }
body.zk-on .nl-langs { display: none; }

/* ---------- Footer ---------- */
.zk-foot { background: #F5F8FD; border-top: 3px solid var(--zk-b); margin-top: 32px; font-size: 14px; line-height: 1.6; }
.zk-foot a { color: var(--zk-bd); }
.zk-foot .zk-fin { max-width: 1280px; margin: 0 auto; padding: 26px 16px 18px; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.5fr); gap: 22px; }
.zk-foot .zk-logo img { height: 36px; width: auto; display: block; }
.zk-foot .zk-fbrand p { margin: 10px 0; color: var(--zk-mut); }
.zk-foot .zk-fquick { display: flex; flex-wrap: wrap; gap: 6px 14px; }
.zk-foot .zk-fquick a { font-weight: 700; text-decoration: none; }
.zk-foot .zk-fquick a:hover { text-decoration: underline; }
.zk-foot .zk-fcards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.zk-foot .zk-card { background: #fff; border: 1px solid var(--zk-line); border-radius: 8px; padding: 10px 12px; display: flex; flex-direction: column; gap: 2px; }
.zk-foot .zk-card b { color: var(--zk-ink); font-size: 13.5px; }
.zk-foot .zk-card > a { font-size: 17px; font-weight: 800; color: var(--zk-b); text-decoration: none; }
.zk-foot .zk-qr { flex-direction: row; align-items: center; gap: 10px; }
.zk-foot .zk-qr img { width: 84px; height: 84px; border: 1px solid var(--zk-line); border-radius: 4px; background: #fff; flex: 0 0 auto; }
.zk-foot .zk-qr div { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.zk-foot .zk-qr span { color: var(--zk-mut); font-size: 13px; }
.zk-foot .zk-fbot { background: #fff; border-top: 1px solid var(--zk-line); }
.zk-foot .zk-fin2 { max-width: 1280px; margin: 0 auto; padding: 12px 16px 16px; }
.zk-foot .zk-fin2 p { margin: 4px 0; }
.zk-foot .zk-addr { color: var(--zk-ink); }
.zk-foot .zk-links { display: flex; flex-wrap: wrap; gap: 4px 16px; }
.zk-foot .zk-copy { color: var(--zk-mut); font-size: 12.5px; }
@media (max-width: 860px) {
  .zk-foot .zk-fin { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 420px) {
  .zk-foot .zk-fcards { grid-template-columns: minmax(0, 1fr); }
}