/* Phông chữ tự lưu (bản lưu 2026-10-26): Barlow Semi Condensed cho tiêu đề, Be Vietnam Pro cho chữ thường */
@font-face{font-family:'Barlow Semi Condensed';font-style:normal;font-weight:600;font-display:swap;src:url(../fonts/barlow-semi-condensed-600-vietnamese.woff2) format('woff2');unicode-range:U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB}
@font-face{font-family:'Barlow Semi Condensed';font-style:normal;font-weight:600;font-display:swap;src:url(../fonts/barlow-semi-condensed-600-latin-ext.woff2) format('woff2');unicode-range:U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF}
@font-face{font-family:'Barlow Semi Condensed';font-style:normal;font-weight:600;font-display:swap;src:url(../fonts/barlow-semi-condensed-600-latin.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}
@font-face{font-family:'Barlow Semi Condensed';font-style:normal;font-weight:700;font-display:swap;src:url(../fonts/barlow-semi-condensed-700-vietnamese.woff2) format('woff2');unicode-range:U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB}
@font-face{font-family:'Barlow Semi Condensed';font-style:normal;font-weight:700;font-display:swap;src:url(../fonts/barlow-semi-condensed-700-latin-ext.woff2) format('woff2');unicode-range:U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF}
@font-face{font-family:'Barlow Semi Condensed';font-style:normal;font-weight:700;font-display:swap;src:url(../fonts/barlow-semi-condensed-700-latin.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}
@font-face{font-family:'Be Vietnam Pro';font-style:normal;font-weight:400;font-display:swap;src:url(../fonts/be-vietnam-pro-400-vietnamese.woff2) format('woff2');unicode-range:U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB}
@font-face{font-family:'Be Vietnam Pro';font-style:normal;font-weight:400;font-display:swap;src:url(../fonts/be-vietnam-pro-400-latin-ext.woff2) format('woff2');unicode-range:U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF}
@font-face{font-family:'Be Vietnam Pro';font-style:normal;font-weight:400;font-display:swap;src:url(../fonts/be-vietnam-pro-400-latin.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}
@font-face{font-family:'Be Vietnam Pro';font-style:normal;font-weight:500;font-display:swap;src:url(../fonts/be-vietnam-pro-500-vietnamese.woff2) format('woff2');unicode-range:U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB}
@font-face{font-family:'Be Vietnam Pro';font-style:normal;font-weight:500;font-display:swap;src:url(../fonts/be-vietnam-pro-500-latin-ext.woff2) format('woff2');unicode-range:U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF}
@font-face{font-family:'Be Vietnam Pro';font-style:normal;font-weight:500;font-display:swap;src:url(../fonts/be-vietnam-pro-500-latin.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}
@font-face{font-family:'Be Vietnam Pro';font-style:normal;font-weight:600;font-display:swap;src:url(../fonts/be-vietnam-pro-600-vietnamese.woff2) format('woff2');unicode-range:U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB}
@font-face{font-family:'Be Vietnam Pro';font-style:normal;font-weight:600;font-display:swap;src:url(../fonts/be-vietnam-pro-600-latin-ext.woff2) format('woff2');unicode-range:U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF}
@font-face{font-family:'Be Vietnam Pro';font-style:normal;font-weight:600;font-display:swap;src:url(../fonts/be-vietnam-pro-600-latin.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}
@font-face{font-family:'Be Vietnam Pro';font-style:normal;font-weight:700;font-display:swap;src:url(../fonts/be-vietnam-pro-700-vietnamese.woff2) format('woff2');unicode-range:U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB}
@font-face{font-family:'Be Vietnam Pro';font-style:normal;font-weight:700;font-display:swap;src:url(../fonts/be-vietnam-pro-700-latin-ext.woff2) format('woff2');unicode-range:U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF}
@font-face{font-family:'Be Vietnam Pro';font-style:normal;font-weight:700;font-display:swap;src:url(../fonts/be-vietnam-pro-700-latin.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}
/* ==========================================================================
   Cửa Cuốn Quốc Tuấn: giao diện web tĩnh
   Luôn nền sáng (không có chế độ tối, kể cả khi máy bật Dark mode).
   Tông bạc thép, một màu nhấn đỏ QT DOOR. Bo góc một cỡ: 4px.
   Mọi tổ hợp chữ/nền đã đo đạt WCAG AA (xem _workspace/03_thiet-ke_ghi-chu.md).
   ========================================================================== */
:root {
  color-scheme: only light;
  --nen: #eceff2;        /* nền trang */
  --the: #f7f8fa;        /* thẻ nội dung */
  --dai: #e2e6eb;        /* dải nhấn */
  --vien: #d3d9df;       /* viền */
  --vien-dam: #b9c1ca;
  --chu: #161b22;        /* chữ chính, than chì */
  --chu-2: #38414c;      /* chữ phụ */
  --chu-3: #56606c;      /* chữ phụ nhạt (>= 5.1:1 trên mọi nền) */
  --do: #c8102e;         /* đỏ thương hiệu: nút gọi */
  --do-dam: #a80d27;     /* đỏ đậm: dải menu, chữ đỏ cỡ nhỏ */
  --do-nhat: #f6e3e6;
  --toi: #161b22;
  --bong: 0 1px 2px rgba(22, 27, 34, .06), 0 10px 28px -16px rgba(22, 27, 34, .28);
  --bong-nho: 0 1px 2px rgba(22, 27, 34, .07);
  --bo: 4px;
  --f-chu: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --f-td: "Barlow Semi Condensed", "Be Vietnam Pro", "Arial Narrow", Arial, sans-serif;
  --cao-menu: 52px;
  --rong: 1200px;
  --le: 16px;
  /* sọc ngang gợi lá cửa cuốn */
  --soc: repeating-linear-gradient(180deg, transparent 0 25px, rgba(22, 27, 34, .045) 25px 26px);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-padding-top: calc(var(--cao-menu) + 16px); }
body {
  margin: 0;
  background: var(--nen);
  color: var(--chu);
  font-family: var(--f-chu);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg, picture { display: block; max-width: 100%; }
img { height: auto; }
a { color: inherit; }
button { font: inherit; color: inherit; }
h1, h2, h3, h4 { font-family: var(--f-td); font-weight: 700; line-height: 1.15; margin: 0; color: var(--chu); letter-spacing: .003em; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; }
figure { margin: 0; }
:focus-visible { outline: 3px solid var(--do); outline-offset: 2px; }
.an { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.bo-qua { position: absolute; left: 8px; top: -60px; z-index: 100; background: var(--toi); color: #fff; padding: 10px 14px; border-radius: var(--bo); text-decoration: none; }
.bo-qua:focus { top: 8px; }
.khung { width: 100%; max-width: calc(var(--rong) + 2 * var(--le)); margin: 0 auto; padding: 0 var(--le); }
@media (min-width: 768px) { :root { --le: 24px; } }
@media (min-width: 1280px) { :root { --le: 32px; } }
.ic { width: 1.25em; height: 1.25em; flex: none; }

/* ---------- nút ---------- */
.nut {
  display: inline-flex; align-items: center; justify-content: center; gap: .5em;
  min-height: 48px; padding: 0 20px; border-radius: var(--bo); border: 1.5px solid transparent;
  font-family: var(--f-td); font-weight: 600; font-size: 1.0625rem; letter-spacing: .01em; line-height: 1;
  text-decoration: none; white-space: nowrap; cursor: pointer;
  transition: background-color .18s ease, border-color .18s ease, color .18s ease, transform .12s ease;
}
.nut:active { transform: translateY(1px); }
.nut .ic { width: 1.2em; height: 1.2em; }
.nut--do { background: var(--do); color: #fff; }
.nut--do:hover { background: var(--do-dam); }
.nut--toi { background: var(--toi); color: #fff; }
.nut--toi:hover { background: #2b333d; }
.nut--vien { background: transparent; border-color: var(--chu); color: var(--chu); }
.nut--vien:hover { background: var(--chu); color: #fff; }
.nut--trang { background: var(--the); color: var(--do-dam); }
.nut--trang:hover { background: #fff; }
.nut--vien-trang { background: transparent; border-color: rgba(255, 255, 255, .9); color: #fff; }
.nut--vien-trang:hover { background: rgba(255, 255, 255, .12); }
.nut--day { width: 100%; }
.nut--lon { min-height: 56px; padding: 0 28px; font-size: 1.25rem; }
.nut--nho { min-height: 38px; padding: 0 12px; font-size: .9375rem; }
.nut--nho .ic { width: 1.1em; height: 1.1em; }

/* ---------- đầu trang ---------- */
.dau-trang { background: var(--the); border-bottom: 3px solid var(--do); position: relative; z-index: 40; }
.dau-trang__trong { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; }
.thuong-hieu { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--chu); min-width: 0; }
.thuong-hieu img { width: auto; height: 44px; }
.thuong-hieu__chu { display: flex; flex-direction: column; line-height: 1.1; }
.thuong-hieu__ten { font-family: var(--f-td); font-weight: 700; font-size: 1.25rem; letter-spacing: .01em; white-space: nowrap; }
.thuong-hieu__phu { font-size: .8125rem; color: var(--chu-3); font-weight: 500; margin-top: 3px; }
.dau-trang__lien-he { display: none; align-items: center; gap: 12px; }
.dau-trang__gio { display: none; align-items: center; gap: 8px; color: var(--chu-2); font-size: .9375rem; font-weight: 500; }
.dau-trang__gio .ic { color: var(--do-dam); }
.nut-menu { display: inline-flex; align-items: center; justify-content: center; width: 48px; height: 48px; border: 1.5px solid var(--vien-dam); border-radius: var(--bo); background: var(--the); cursor: pointer; color: var(--chu); }
.nut-menu .ic { width: 26px; height: 26px; }
.nut-menu .ic--dong { display: none; }
.menu-mo .nut-menu .ic--mo { display: none; }
.menu-mo .nut-menu .ic--dong { display: block; }

/* ---------- menu: điện thoại (dưới 768px) ---------- */
.thanh-menu { display: none; background: var(--the); border-bottom: 1px solid var(--vien); }
.menu-mo .thanh-menu { display: block; box-shadow: var(--bong); }
.thanh-menu__trong { padding: 0; }
.menu { list-style: none; }
.menu__muc { position: relative; border-top: 1px solid var(--vien); display: flex; flex-wrap: wrap; align-items: stretch; }
.menu__muc > a { flex: 1; display: flex; align-items: center; gap: 10px; min-height: 52px; padding: 0 var(--le); text-decoration: none; font-family: var(--f-td); font-weight: 600; font-size: 1.125rem; }
.menu__muc > a .ic { color: var(--do-dam); }
.menu__muc.dang-xem > a { color: var(--do-dam); box-shadow: inset 4px 0 0 var(--do); }
.menu__mo { width: 56px; border: 0; border-left: 1px solid var(--vien); background: transparent; cursor: pointer; display: flex; align-items: center; justify-content: center; }
.menu__mo .ic { transition: transform .2s ease; }
.menu__muc.mo .menu__mo .ic { transform: rotate(180deg); }
.menu-con { display: none; width: 100%; background: var(--nen); padding: 6px var(--le) 14px; }
.menu__muc.mo .menu-con { display: block; }
.menu-con ul { list-style: none; }
.menu-con a { display: block; padding: 9px 0; text-decoration: none; color: var(--chu-2); font-weight: 500; }
.menu-con a:hover { color: var(--do-dam); }
.menu-con__nhan { font-family: var(--f-td); font-weight: 700; font-size: .9375rem; color: var(--chu-3); margin: 10px 0 2px; }
.menu-con__luoi { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 16px; }
.thanh-menu__goi { display: none; }

/* ---------- thanh gọi nhanh dính đáy (điện thoại) ---------- */
.thanh-goi {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 60;
  display: grid; grid-template-columns: 1.35fr 1fr; gap: 8px;
  padding: 8px 10px calc(8px + env(safe-area-inset-bottom));
  background: rgba(247, 248, 250, .97); border-top: 1px solid var(--vien); box-shadow: 0 -6px 20px -12px rgba(22, 27, 34, .35);
}
.thanh-goi__nut { min-height: 50px; padding: 0 10px; font-size: 1.0625rem; }
body { padding-bottom: calc(68px + env(safe-area-inset-bottom)); }

/* Nút Zalo và gọi nổi ở góc dưới phải, chỉ hiện từ 768px (dưới 768px đã có thanh-goi). Người dùng yêu cầu 2026-10-31: trang nào cũng liên hệ được. */
.lien-he-noi { display: none; }
.lien-he-noi__nut {
  display: inline-flex; align-items: center; gap: 8px; height: 52px; padding: 0 20px 0 16px;
  border-radius: 26px; color: #fff; font-weight: 700; font-size: 1.0625rem; text-decoration: none;
  box-shadow: 0 8px 22px -10px rgba(22, 27, 34, .55); transition: transform .15s ease, box-shadow .15s ease;
}
.lien-he-noi__nut .ic { width: 24px; height: 24px; color: #fff; }
.lien-he-noi__nut:hover, .lien-he-noi__nut:focus-visible { transform: translateY(-2px); box-shadow: 0 12px 26px -10px rgba(22, 27, 34, .6); color: #fff; }
.lien-he-noi__nut--zalo { background: #0068ff; }
.lien-he-noi__nut--goi { background: var(--do); }

/* ---------- máy tính bảng và máy tính (từ 768px) ---------- */
@media (min-width: 768px) {
  body { padding-bottom: 0; }
  .thanh-goi { display: none; }
  .lien-he-noi { display: flex; flex-direction: column; align-items: flex-end; gap: 10px; position: fixed; right: 20px; bottom: 20px; z-index: 60; }
  .nut-menu { display: none; }
  .dau-trang { border-bottom: 0; }
  .dau-trang__trong { min-height: 76px; }
  .thuong-hieu img { height: 54px; }
  .thuong-hieu__ten { font-size: 1.5rem; }
  .thuong-hieu__phu { font-size: .875rem; }
  .dau-trang__lien-he { display: flex; }
  .dau-trang__lien-he .nut--vien { min-height: 44px; padding: 0 14px; }
  .dau-trang__lien-he .nut--do { min-height: 44px; padding: 0 16px; font-size: 1.125rem; }

  .thanh-menu, .menu-mo .thanh-menu {
    display: block; position: sticky; top: 0; z-index: 50;
    background: var(--do-dam); border: 0; box-shadow: 0 2px 0 rgba(22, 27, 34, .08);
  }
  .thanh-menu__trong { display: flex; align-items: stretch; justify-content: space-between; gap: 8px; padding: 0 var(--le); height: var(--cao-menu); }
  .menu { display: flex; align-items: stretch; flex-wrap: nowrap; }
  .menu__muc { border: 0; flex-wrap: nowrap; }
  .menu__muc > a {
    flex: none; min-height: 0; height: var(--cao-menu); padding: 0 9px; gap: 6px;
    color: #fff; font-size: .9375rem; letter-spacing: .01em; white-space: nowrap; position: relative;
  }
  .menu__muc > a .ic { color: #fff; width: 22px; height: 22px; }
  .menu__chu-nha { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .menu__muc > a::after { content: ""; position: absolute; left: 9px; right: 9px; bottom: 0; height: 3px; background: #fff; transform: scaleX(0); transform-origin: left; transition: transform .2s ease; }
  .menu__muc.dang-xem > a { color: #fff; box-shadow: none; }
  .menu__muc.dang-xem > a::after, .menu__muc > a:hover::after { transform: scaleX(1); }
  .menu__muc.co-con > a { padding-right: 2px; }
  .menu__mo { width: 24px; border: 0; color: #fff; padding: 0 8px 0 0; }
  .menu__mo .ic { width: 15px; height: 15px; }
  :focus-visible { outline-color: var(--do); }
  .thanh-menu :focus-visible { outline-color: #fff; outline-offset: -3px; }

  .menu-con {
    position: absolute; top: 100%; left: 0; z-index: 55; width: auto; min-width: 260px;
    background: var(--the); border-top: 3px solid var(--do); border-radius: 0 0 var(--bo) var(--bo);
    box-shadow: var(--bong); padding: 14px 18px 16px;
  }
  .menu-con--rong { display: none; grid-template-columns: auto auto; gap: 28px; }
  .menu__muc.co-con:hover .menu-con, .menu__muc.co-con:focus-within .menu-con, .menu__muc.mo .menu-con { display: grid; }
  .menu-con__luoi { grid-template-columns: repeat(2, minmax(110px, auto)); column-gap: 24px; }
  .menu-con a { padding: 6px 0; white-space: nowrap; font-size: .9375rem; }
  .menu-con__nhan { white-space: nowrap; }
  .menu-con--sp .menu-con__nhom--hep { border-left: 1px solid var(--vien); padding-left: 24px; }

  .thanh-menu__goi {
    display: inline-flex; align-items: center; gap: 8px; align-self: center;
    height: 38px; padding: 0 12px; border-radius: var(--bo);
    background: var(--the); color: var(--do-dam); text-decoration: none;
    font-family: var(--f-td); font-weight: 700; font-size: 1.0625rem; white-space: nowrap;
    visibility: hidden; opacity: 0; transform: translateY(-4px);
    transition: opacity .2s ease, transform .2s ease, visibility 0s linear .2s;
  }
  .thanh-menu__goi span { display: none; }
  .da-cuon .thanh-menu__goi { visibility: visible; opacity: 1; transform: none; transition: opacity .2s ease, transform .2s ease; }
}
@media (min-width: 900px) {
  .menu__muc > a { padding: 0 12px; font-size: 1rem; }
  .menu__muc > a::after { left: 12px; right: 12px; }
}
@media (min-width: 1024px) {
  .dau-trang__gio { display: flex; }
  .menu__muc > a { padding: 0 14px; font-size: 1.0625rem; }
  .menu__muc > a::after { left: 14px; right: 14px; }
  .thanh-menu__goi span { display: inline; }
}
@media (min-width: 1280px) {
  .menu__muc > a { padding: 0 17px; }
  .menu__muc > a::after { left: 17px; right: 17px; }
}

/* ---------- đường dẫn trang ---------- */
.duong-dan { margin-bottom: 16px; font-size: .875rem; color: var(--chu-3); }
.duong-dan ol { list-style: none; display: flex; flex-wrap: wrap; gap: 4px 0; }
.duong-dan li { display: inline-flex; align-items: center; }
.duong-dan li + li::before { content: "/"; margin: 0 8px; color: var(--vien-dam); }
.duong-dan a { color: var(--chu-2); text-decoration: none; }
.duong-dan a:hover { color: var(--do-dam); text-decoration: underline; }
.duong-dan [aria-current] { color: var(--chu-3); max-width: 32ch; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; display: inline-block; }
@media (max-width: 639px) {
  /* điện thoại: chỉ giữ Trang chủ và mục cha gần nhất, tên trang đã có ở H1 */
  .duong-dan li:not(:first-child):not(:nth-last-child(2)) { display: none; }
  .duong-dan li:nth-last-child(2):first-child + li { display: inline-flex; }
}

/* ---------- đầu trang nội dung (hero) ---------- */
.hero { background: var(--soc), var(--nen); padding: 24px 0 36px; border-bottom: 1px solid var(--vien); }
.hero__luoi { display: grid; gap: 28px; align-items: center; }
.hero__chu { min-width: 0; }
.hero__tieu-de { font-size: clamp(1.875rem, 1.25rem + 2.6vw, 3.1rem); line-height: 1.08; text-wrap: balance; }
.hero--gon .hero__tieu-de { font-size: clamp(1.75rem, 1.2rem + 2.2vw, 2.75rem); }
.hero__mo-ta { margin-top: 14px; font-size: 1.0625rem; color: var(--chu-2); max-width: 60ch; }
.hero__nut { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
/* trang chủ: nút Gọi chính và hai lối Zalo cùng cấp */
.hero__nut--chu .nut--lon { flex: 1 1 auto; }
.loi-zalo__nhom { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-top: 10px; max-width: 560px; }
.loi-zalo {
  display: flex; align-items: center; gap: 10px; min-height: 64px; padding: 10px 12px;
  background: var(--the); border: 1.5px solid var(--vien-dam); border-radius: var(--bo);
  text-decoration: none; color: var(--chu); transition: border-color .18s ease, background-color .18s ease;
}
.loi-zalo:hover { border-color: var(--chu); background: #fff; }
.loi-zalo .ic { width: 24px; height: 24px; color: var(--do-dam); }
.loi-zalo__chu { display: flex; flex-direction: column; line-height: 1.2; min-width: 0; }
.loi-zalo__chu strong { font-family: var(--f-td); font-weight: 700; font-size: 1.125rem; }
.loi-zalo__chu span { font-size: .875rem; color: var(--chu-2); }
@media (min-width: 640px) { .hero__nut--chu .nut--lon { flex: 0 0 auto; } .loi-zalo { padding: 12px 16px; } }
@media (max-width: 639px) { .hero__nut--chu .nut--lon { width: 100%; } }
/* trang sửa: khu vực và thông tin trước nút, đoạn mở đầu sau */
.hero__gia { margin-top: 14px; font-size: 1rem; }
.hero__gia .ic:first-child { color: var(--do-dam); }
.hero__mo-ta--sau { margin-top: 18px; font-size: 1rem; }
.trang--dich-vu-sua .hero__nut, .trang--khu-vuc-sua .hero__nut { margin-top: 18px; }
.trang--dich-vu-sua .su-that--gon, .trang--khu-vuc-sua .su-that--gon { margin-top: 14px; }
.trang--dich-vu-sua .nhan-khu-vuc, .trang--khu-vuc-sua .nhan-khu-vuc { margin-top: 14px; }
@media (max-width: 767px) {
  .trang--dich-vu-sua .hero, .trang--khu-vuc-sua .hero { padding-top: 16px; }
  .trang--dich-vu-sua .hero__nut .nut, .trang--khu-vuc-sua .hero__nut .nut { flex: 1 1 0; padding: 0 12px; }
}
.hero__anh { background: var(--the); border: 1px solid var(--vien); border-radius: var(--bo); padding: 8px; box-shadow: var(--bong); }
.hero__anh img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; object-position: 50% 30%; border-radius: 2px; }
.hero--chu .hero__anh img { aspect-ratio: 941 / 600; }
@media (min-width: 1024px) {
  .hero { padding: 40px 0 56px; }
  .hero--co-anh .hero__luoi { grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: 56px; }
  .hero--chu .hero__luoi { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .hero--gon .hero__chu { max-width: 880px; }
}

/* dấu mốc Từ năm 2005 */
.moc {
  display: inline-flex; align-items: center; gap: 12px; margin-bottom: 18px;
  background: var(--the); border: 1px solid var(--vien); border-left: 4px solid var(--do);
  border-radius: var(--bo); padding: 6px 16px 6px 12px; box-shadow: var(--bong-nho);
}
.moc__khoi { display: grid; line-height: 1; }
.moc__nhan { font-size: .8125rem; font-weight: 600; color: var(--chu-3); line-height: 1.1; margin-bottom: 2px; }
.moc__nam { font-family: var(--f-td); font-weight: 700; font-size: 2.6rem; line-height: 1; color: var(--do-dam); letter-spacing: .02em; }
.moc__phu { font-family: var(--f-td); font-weight: 600; font-size: 1.125rem; color: var(--chu); padding-left: 12px; border-left: 1px solid var(--vien); line-height: 1.15; }
.moc--lon { display: flex; gap: 16px; padding: 16px 20px; margin-bottom: 16px; }
.moc--lon .moc__nhan { font-size: .9375rem; }
.moc--lon .moc__nam { font-size: clamp(3.4rem, 2.6rem + 3vw, 5rem); }
.moc--lon .moc__phu { align-self: center; font-size: 1.25rem; }

/* dải thông tin đã xác nhận */
.dai-su-that { background: var(--dai); border-bottom: 1px solid var(--vien); }
.su-that { list-style: none; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0; }
.su-that li { display: flex; align-items: flex-start; gap: 10px; padding: 16px 12px 16px 0; font-size: .9375rem; line-height: 1.35; }
.su-that li .ic { width: 28px; height: 28px; color: var(--do-dam); margin-top: 1px; }
.su-that__nhan { display: block; font-size: .8125rem; color: var(--chu-3); font-weight: 500; margin-bottom: 2px; }
.su-that strong { font-weight: 600; color: var(--chu); }
@media (min-width: 1024px) {
  .su-that { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .su-that li { padding: 20px 20px 20px 0; }
  .su-that li + li { padding-left: 20px; border-left: 1px solid var(--vien); }
}
.su-that--gon { margin-top: 24px; border-top: 1px solid var(--vien); }
.su-that--gon li { padding: 12px 10px 4px 0; font-size: .875rem; }
.su-that--gon li .ic { width: 22px; height: 22px; }
@media (min-width: 1024px) {
  .su-that--gon { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .su-that--gon li + li { padding-left: 0; border-left: 0; }
}
.nhan-khu-vuc { display: inline-flex; align-items: center; gap: 8px; margin-top: 18px; padding: 7px 14px; background: var(--the); border: 1px solid var(--vien); border-radius: var(--bo); color: var(--do-dam); font-weight: 600; font-size: .9375rem; }
.nhan-khu-vuc .ic { width: 18px; height: 18px; }

/* ---------- khối chung ---------- */
.khoi { padding: 48px 0; }
.khoi--dai { background: var(--dai); border-top: 1px solid var(--vien); border-bottom: 1px solid var(--vien); }
.khoi--sp { padding: 36px 0 8px; }
.khoi--sp + .khoi--sp { padding-top: 20px; }
.khoi__tieu-de { font-size: clamp(1.6rem, 1.15rem + 1.7vw, 2.35rem); text-wrap: balance; }
.khoi__tieu-de::before { content: ""; display: block; width: 36px; height: 4px; background: var(--do); margin-bottom: 14px; border-radius: 1px; }
.khoi__tieu-de--nho { font-size: clamp(1.35rem, 1.1rem + .9vw, 1.75rem); }
.khoi__tieu-de--nho::before { width: 28px; height: 3px; margin-bottom: 10px; }
.khoi__dan { margin-top: 12px; color: var(--chu-2); font-size: 1.0625rem; max-width: 68ch; }
.khoi__dau-hang { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.khoi__tieu-de + .luoi-o-sp, .khoi__tieu-de + .cong-thuc, .khoi__tieu-de + .quy-trinh, .khoi__dau-hang + .cong-trinh, .khoi__dau-hang + .luoi-sp { margin-top: 28px; }
.lien-ket-mui-ten { display: inline-flex; align-items: center; gap: 6px; color: var(--do-dam); font-family: var(--f-td); font-weight: 600; font-size: 1.0625rem; text-decoration: none; }
.lien-ket-mui-ten .ic { transition: transform .18s ease; }
.lien-ket-mui-ten:hover .ic { transform: translateX(3px); }
.lien-ket-mui-ten:hover { text-decoration: underline; text-underline-offset: 3px; }
@media (min-width: 1024px) { .khoi { padding: 72px 0; } .khoi--sp { padding: 44px 0 8px; } }

/* sản phẩm trang chủ: lưới không đều */
.luoi-o-sp { list-style: none; display: grid; gap: 10px; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.o-sp--lon { grid-column: 1 / -1; }
@media (max-width: 639px) {
  .o-sp:not(.o-sp--lon) .o-sp__mo-ta { display: none; }
  .o-sp:not(.o-sp--lon) .o-sp__chu { padding: 10px 12px 12px; }
  .o-sp:not(.o-sp--lon) .o-sp__ten { font-size: 1.0625rem; }
  .o-sp:not(.o-sp--lon) .o-sp__xem { font-size: .9375rem; }
}
.o-sp > a:not(.o-sp__phu-kin) { display: flex; flex-direction: column; height: 100%; background: var(--the); border: 1px solid var(--vien); border-radius: var(--bo); overflow: hidden; text-decoration: none; transition: border-color .18s ease, box-shadow .18s ease; }
.o-sp > a:not(.o-sp__phu-kin):hover { border-color: var(--vien-dam); box-shadow: var(--bong); }
.o-sp__anh { display: block; aspect-ratio: 4 / 3; overflow: hidden; background: var(--dai); }
.o-sp__anh img, .o-sp__anh picture { width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
.o-sp > a:hover .o-sp__anh img { transform: scale(1.03); }
.o-sp__chu { display: flex; flex-direction: column; gap: 6px; padding: 14px 16px 16px; flex: 1; }
.o-sp__ten { font-family: var(--f-td); font-weight: 700; font-size: 1.25rem; line-height: 1.15; color: var(--chu); }
.o-sp__mo-ta { font-size: .9375rem; color: var(--chu-3); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.o-sp__xem { margin-top: auto; padding-top: 6px; display: inline-flex; align-items: center; gap: 6px; color: var(--do-dam); font-family: var(--f-td); font-weight: 600; }
/* ô lớn: cửa cuốn nhôm công nghệ Đức, cả hàng ngang, có các hãng */
.o-sp--lon { position: relative; display: flex; flex-direction: column; background: var(--the); border: 1px solid var(--vien); border-radius: var(--bo); overflow: hidden; transition: border-color .18s ease, box-shadow .18s ease; }
.o-sp--lon:hover { border-color: var(--vien-dam); box-shadow: var(--bong); }
.o-sp--lon:hover .o-sp__anh img { transform: scale(1.03); }
.o-sp__phu-kin { position: absolute; inset: 0; z-index: 1; background: transparent; }
.o-sp--lon .o-sp__anh { aspect-ratio: 941 / 600; }
.o-sp--lon .o-sp__chu { gap: 10px; }
.o-sp--lon .o-sp__mo-ta { -webkit-line-clamp: 5; }
.o-sp--lon .ds-chip, .o-sp--lon .o-sp__xem { position: relative; z-index: 2; }
.o-sp--lon .o-sp__xem { text-decoration: none; align-self: flex-start; }
@media (min-width: 640px) { .luoi-o-sp { gap: 14px; } }
@media (min-width: 1024px) {
  .luoi-o-sp { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
  .o-sp--lon { flex-direction: row; }
  .o-sp--lon .o-sp__anh { flex: 0 0 58%; aspect-ratio: auto; min-height: 340px; }
  .o-sp--lon .o-sp__chu { justify-content: center; padding: 32px 36px; }
  .o-sp--lon .o-sp__ten { font-size: 2rem; }
  .o-sp--lon .o-sp__mo-ta { font-size: 1.0625rem; color: var(--chu-2); }
  .o-sp--lon .o-sp__xem { margin-top: 8px; font-size: 1.125rem; }
}
.dai-hang { margin-top: 28px; padding-top: 22px; border-top: 1px solid var(--vien); display: grid; gap: 12px; }
.dai-hang__nsx { display: flex; align-items: flex-start; gap: 10px; font-size: 1.03125rem; font-weight: 500; color: var(--chu); max-width: 60ch; }
.dai-hang__nsx .ic { width: 26px; height: 26px; color: var(--do-dam); flex: none; }
.dai-hang__ds { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 14px; color: var(--chu-2); font-size: .9375rem; }
.ds-chip { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; }
.ds-chip--dau { padding-top: 20px; }
.chip { display: inline-flex; align-items: center; min-height: 38px; padding: 0 14px; background: var(--the); border: 1px solid var(--vien); border-radius: var(--bo); text-decoration: none; font-family: var(--f-td); font-weight: 600; font-size: 1.0625rem; color: var(--chu); transition: border-color .18s ease, color .18s ease; }
.chip:hover { border-color: var(--do); color: var(--do-dam); }

/* sửa chữa (trang chủ) */
.sua-chua__luoi { display: grid; gap: 28px; align-items: center; }
.sua-chua__anh { background: var(--the); border: 1px solid var(--vien); border-radius: var(--bo); padding: 8px; box-shadow: var(--bong); }
.sua-chua__anh img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; object-position: 50% 30%; border-radius: 2px; }
.ds-loi { list-style: none; display: grid; gap: 2px 24px; margin-top: 22px; }
.ds-loi li { display: flex; gap: 10px; align-items: flex-start; padding: 9px 0; border-bottom: 1px solid var(--vien); font-size: .96875rem; color: var(--chu); }
.ds-loi .ic { color: var(--do-dam); width: 20px; height: 20px; margin-top: 2px; }
.sua-chua__nut { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
@media (min-width: 640px) { .ds-loi { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 1024px) {
  .sua-chua__luoi { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 56px; }
  .sua-chua__anh img { aspect-ratio: 4 / 5; }
}

/* cách tính chi phí */
.cong-thuc { list-style: none; display: flex; flex-direction: column; align-items: stretch; gap: 8px; }
.cong-thuc__o { display: flex; align-items: center; gap: 12px; padding: 16px 18px; background: var(--the); border: 1px solid var(--vien); border-radius: var(--bo); font-family: var(--f-td); font-weight: 600; font-size: 1.1875rem; line-height: 1.2; color: var(--chu); box-shadow: var(--bong-nho); }
.cong-thuc__o .ic { width: 30px; height: 30px; color: var(--chu-3); }
.cong-thuc__o--tong { border: 2px solid var(--do); color: var(--do-dam); }
.cong-thuc__o--tong .ic { color: var(--do); }
.cong-thuc__dau { align-self: center; font-family: var(--f-td); font-weight: 700; font-size: 1.75rem; line-height: 1; color: var(--chu-3); }
.chi-phi__ghi { display: grid; gap: 12px; margin-top: 26px; }
.chi-phi__ghi p { display: flex; gap: 10px; align-items: flex-start; color: var(--chu-2); font-size: .96875rem; }
.chi-phi__ghi .ic { color: var(--do-dam); width: 20px; height: 20px; margin-top: 3px; }
@media (min-width: 1024px) {
  .cong-thuc { flex-direction: row; align-items: stretch; }
  .cong-thuc__o { flex: 1; flex-direction: column; align-items: flex-start; justify-content: space-between; min-height: 132px; padding: 18px 20px; }
  .cong-thuc__o--tong { flex: 1.15; }
  .cong-thuc__dau { padding: 0 6px; font-size: 2.25rem; }
  .chi-phi__ghi { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
}

/* quy trình */
.quy-trinh { list-style: none; display: grid; gap: 0; counter-reset: b; }
.quy-trinh__buoc { position: relative; padding: 18px 0 20px 64px; border-top: 1px solid var(--vien-dam); }
.quy-trinh__so { position: absolute; left: 0; top: 14px; font-family: var(--f-td); font-weight: 700; font-size: 2.5rem; line-height: 1; color: var(--chu-3); }
.quy-trinh__buoc h3 { font-size: 1.3125rem; font-weight: 700; }
.quy-trinh__buoc p { margin-top: 6px; color: var(--chu-2); font-size: .96875rem; }
@media (min-width: 768px) { .quy-trinh { grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 32px; } }
@media (min-width: 1024px) {
  .quy-trinh { grid-template-columns: repeat(4, minmax(0, 1fr)); column-gap: 28px; }
  .quy-trinh__buoc { padding: 22px 0 0; border-top: 3px solid var(--vien-dam); }
  .quy-trinh__buoc::before { content: ""; position: absolute; left: 0; top: -3px; width: 48px; height: 3px; background: var(--do); }
  .quy-trinh__so { position: static; display: block; font-size: 3.25rem; margin-bottom: 12px; }
}

/* công trình */
.cong-trinh { list-style: none; display: grid; gap: 14px 10px; grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (max-width: 639px) { .cong-trinh__ten { font-size: .96875rem; margin-top: 6px; } }
.cong-trinh a { display: block; text-decoration: none; }
.cong-trinh__anh { display: block; overflow: hidden; border-radius: var(--bo); border: 1px solid var(--vien); background: var(--dai); }
.cong-trinh__anh img { width: 100%; aspect-ratio: 941 / 600; object-fit: cover; transition: transform .35s ease; }
.cong-trinh a:hover img { transform: scale(1.03); }
.cong-trinh__ten { display: block; margin-top: 10px; font-family: var(--f-td); font-weight: 600; font-size: 1.125rem; color: var(--chu); }
.cong-trinh a:hover .cong-trinh__ten { color: var(--do-dam); }
@media (min-width: 1024px) { .cong-trinh { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px 20px; } }

/* giới thiệu (trang chủ) */
.gioi-thieu__luoi { display: grid; gap: 28px; }
.gioi-thieu__anh { background: var(--the); border: 1px solid var(--vien); border-radius: var(--bo); padding: 8px; }
.gioi-thieu__anh img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border-radius: 2px; }
.gioi-thieu__chu > p { margin-top: 14px; color: var(--chu-2); font-size: 1.03125rem; max-width: 70ch; }
.gioi-thieu__chu .khoi__tieu-de { margin-bottom: 4px; }
.su-menh { margin: 22px 0 0; padding: 16px 20px; background: var(--the); border: 1px solid var(--vien); border-left: 4px solid var(--do); border-radius: var(--bo); }
.su-menh p { color: var(--chu); font-size: 1.03125rem; }
.su-menh__nhan { font-family: var(--f-td); font-weight: 700; font-size: 1.0625rem; color: var(--do-dam) !important; margin-bottom: 4px; }
.gioi-thieu__h3 { margin-top: 26px; font-size: 1.375rem; }
.gioi-thieu__chu .ds-icon { margin-top: 12px; }
.gioi-thieu__chu .lien-ket-mui-ten { margin-top: 18px; }
@media (min-width: 1024px) { .gioi-thieu__luoi { grid-template-columns: minmax(0, 4fr) minmax(0, 7fr); gap: 56px; align-items: start; } }

.ds-icon { list-style: none; display: grid; gap: 10px; }
.ds-icon li { display: flex; gap: 10px; align-items: flex-start; color: var(--chu-2); font-size: .96875rem; line-height: 1.5; }
.ds-icon .ic { color: var(--do-dam); width: 20px; height: 20px; margin-top: 2px; }

/* khu vực phục vụ */
.khu-vuc__nhom { margin-top: 26px; }
.khu-vuc__nhom h3 { font-size: 1.125rem; color: var(--chu-2); margin-bottom: 12px; }
.khu-vuc__ds { list-style: none; display: grid; gap: 8px; grid-template-columns: repeat(auto-fill, minmax(138px, 1fr)); }
.khu-vuc__ds a { display: flex; align-items: center; gap: 8px; min-height: 46px; padding: 0 12px; background: var(--the); border: 1px solid var(--vien); border-radius: var(--bo); text-decoration: none; font-weight: 600; font-size: .9375rem; color: var(--chu); transition: border-color .18s ease, color .18s ease; }
.khu-vuc__ds a .ic { color: var(--chu-3); width: 16px; height: 16px; }
.khu-vuc__ds a:hover, .khu-vuc__ds a[aria-current] { border-color: var(--do); color: var(--do-dam); }
.khu-vuc__ds a:hover .ic, .khu-vuc__ds a[aria-current] .ic { color: var(--do); }

/* ---------- dải gọi ngay + chân trang ---------- */
.goi-ngay { background: repeating-linear-gradient(180deg, transparent 0 25px, rgba(255, 255, 255, .07) 25px 26px), var(--do-dam); color: #fff; padding: 34px 0; }
.goi-ngay__trong { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 18px 32px; }
.goi-ngay__tieu-de { color: #fff; font-size: 1.25rem; font-weight: 600; }
.goi-ngay__tieu-de::before { display: none; }
.goi-ngay__so { display: inline-block; margin-top: 2px; font-family: var(--f-td); font-weight: 700; font-size: clamp(2.25rem, 1.6rem + 2.8vw, 3.4rem); line-height: 1.05; color: #fff; text-decoration: none; letter-spacing: .02em; }
.goi-ngay__nut { display: flex; flex-wrap: wrap; gap: 10px; }
.goi-ngay :focus-visible { outline-color: #fff; }
.chan-trang { background: var(--dai); color: var(--chu-2); font-size: .9375rem; }
.chan-trang__luoi { display: grid; gap: 32px; padding-top: 44px; padding-bottom: 36px; }
.thuong-hieu--chan img { height: 52px; }
.chan-trang__phap-ly { margin-top: 14px; font-weight: 600; color: var(--chu); }
.chan-trang__ds { list-style: none; margin-top: 12px; display: grid; gap: 10px; }
.chan-trang__ds li { display: flex; gap: 10px; align-items: flex-start; }
.chan-trang__ds .ic { color: var(--do-dam); width: 20px; height: 20px; margin-top: 2px; }
.chan-trang__nhan { display: block; font-size: .8125rem; color: var(--chu-3); font-weight: 500; }
.chan-trang a { color: var(--chu); text-decoration: none; }
.chan-trang a:hover { color: var(--do-dam); text-decoration: underline; text-underline-offset: 3px; }
.chan-trang__tieu-de { font-size: 1.125rem; color: var(--chu); margin-bottom: 12px; }
.chan-trang__co-so, .chan-trang__lk { list-style: none; display: grid; gap: 9px; }
.chan-trang__chi-duong { display: flex; width: max-content; margin-top: 8px; }
.chan-trang .chan-trang__chi-duong { color: var(--chu); text-decoration: none; }
.chan-trang .chan-trang__chi-duong:hover { color: #fff; text-decoration: none; }
.lien-he__chi-duong { margin: 10px 0 0 32px; }
.chan-trang__cuoi { border-top: 1px solid var(--vien); padding: 16px 0; font-size: .875rem; color: var(--chu-3); }
@media (min-width: 640px) { .chan-trang__luoi { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 1024px) { .chan-trang__luoi { grid-template-columns: minmax(0, 1.35fr) minmax(0, 1.1fr) minmax(0, 1fr) minmax(0, .8fr); gap: 40px; padding-top: 56px; } }

/* ---------- bài viết + cột bên ---------- */
.bo-cuc-bai { display: grid; grid-template-columns: minmax(0, 1fr); gap: 32px; padding-top: 36px; padding-bottom: 48px; }
.bo-cuc-bai__chinh { min-width: 0; display: grid; grid-template-columns: minmax(0, 1fr); gap: 24px; align-content: start; }
.bo-cuc-bai__chinh > .khoi { padding: 0; }
@media (min-width: 1024px) {
  .bo-cuc-bai { grid-template-columns: minmax(0, 1fr) 300px; gap: 48px; padding-top: 48px; padding-bottom: 64px; }
  .bo-cuc-bai__dinh { position: sticky; top: calc(var(--cao-menu) + 20px); }
}
.bo-cuc-bai__dinh { display: grid; gap: 16px; }
.muc-luc { background: var(--the); border: 1px solid var(--vien); border-radius: var(--bo); padding: 16px 18px; }
.muc-luc__tieu-de { font-family: var(--f-td); font-weight: 700; font-size: 1.0625rem; margin-bottom: 8px; }
.muc-luc ol { list-style: none; counter-reset: ml; display: grid; gap: 2px; max-height: 46vh; overflow: auto; }
.muc-luc li { counter-increment: ml; display: flex; gap: 8px; font-size: .9rem; line-height: 1.4; }
.muc-luc li::before { content: counter(ml) "."; color: var(--chu-3); font-variant-numeric: tabular-nums; min-width: 1.4em; padding-top: 5px; }
.muc-luc a { display: block; padding: 5px 0; color: var(--chu-2); text-decoration: none; }
.muc-luc a:hover { color: var(--do-dam); text-decoration: underline; }
.the-ben { background: var(--the); border: 1px solid var(--vien); border-top: 3px solid var(--do); border-radius: var(--bo); padding: 18px; }
.the-ben__nhan { font-size: .875rem; color: var(--chu-3); font-weight: 500; }
.the-ben__so { display: block; font-family: var(--f-td); font-weight: 700; font-size: 1.9rem; color: var(--do-dam); text-decoration: none; margin: 2px 0 12px; letter-spacing: .02em; }
.the-ben__nut { display: grid; gap: 8px; }

.bai { background: var(--the); border: 1px solid var(--vien); border-radius: var(--bo); padding: 22px 18px 28px; }
@media (min-width: 768px) { .bai { padding: 34px 40px 40px; } }
.bai--rong { max-width: 900px; margin: 0 auto; }
.bai__nhan { font-size: 1.5rem; margin-bottom: 18px; padding-bottom: 12px; border-bottom: 1px solid var(--vien); }
.prose { color: var(--chu-2); font-size: 1.03125rem; line-height: 1.72; overflow-wrap: anywhere; }
.prose > * + * { margin-top: 1em; }
.prose h2 { margin-top: 1.9em; font-size: clamp(1.4rem, 1.15rem + .9vw, 1.8rem); padding-left: 14px; border-left: 4px solid var(--do); color: var(--chu); }
.prose h3 { margin-top: 1.6em; font-size: 1.3rem; color: var(--chu); }
.prose h4 { margin-top: 1.4em; font-size: 1.125rem; color: var(--chu); }
.prose > :first-child { margin-top: 0; }
.prose h2 + *, .prose h3 + *, .prose h4 + * { margin-top: .6em; }
.prose strong { color: var(--chu); font-weight: 600; }
.prose a { color: var(--do-dam); text-decoration: underline; text-underline-offset: 2px; }
.prose ul { list-style: none; display: grid; gap: .45em; }
.prose ul li { position: relative; padding-left: 22px; }
.prose ul li::before { content: ""; position: absolute; left: 2px; top: .62em; width: 7px; height: 7px; background: var(--do-dam); border-radius: 1px; }
.prose ol { padding-left: 1.4em; display: grid; gap: .45em; }
.prose ol li::marker { color: var(--do-dam); font-weight: 600; }
.prose .trich { border-left: 4px solid var(--vien-dam); padding-left: 14px; color: var(--chu); }
.anh-bai img { border-radius: var(--bo); border: 1px solid var(--vien); margin: 0 auto; max-height: 560px; width: auto; object-fit: contain; }
.anh-luoi { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.anh-luoi figure { background: var(--nen); border: 1px solid var(--vien); border-radius: var(--bo); overflow: hidden; }
.anh-luoi img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.anh-luoi img.anh-png { object-fit: contain; }
.bang-cuon { overflow-x: auto; -webkit-overflow-scrolling: touch; border: 1px solid var(--vien); border-radius: var(--bo); }
.bang-cuon table { width: 100%; border-collapse: collapse; font-size: .9375rem; line-height: 1.5; min-width: 480px; }
.bang-cuon th, .bang-cuon td { padding: 10px 12px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--vien); }
.bang-cuon th { background: var(--dai); color: var(--chu); font-weight: 600; }
.bang-cuon tbody tr:nth-child(even) td { background: rgba(226, 230, 235, .45); }
.bang-cuon tr:last-child td { border-bottom: 0; }

/* hỏi đáp */
.hoi-dap { display: grid; gap: 10px; }
.hoi-dap__muc { border: 1px solid var(--vien); border-radius: var(--bo); background: var(--nen); }
.hoi-dap__muc summary { list-style: none; cursor: pointer; display: flex; justify-content: space-between; gap: 12px; padding: 14px 16px; font-family: var(--f-td); font-weight: 600; font-size: 1.125rem; color: var(--chu); }
.hoi-dap__muc summary::-webkit-details-marker { display: none; }
.hoi-dap__ic { color: var(--do-dam); transition: transform .2s ease; margin-top: 2px; }
.hoi-dap__muc[open] .hoi-dap__ic { transform: rotate(45deg); }
.hoi-dap__dap { padding: 0 16px 14px; }

/* bảng giá, ưu đãi, cam kết */
.bang-gia { background: var(--the); border: 1px solid var(--vien); border-radius: var(--bo); padding: 22px 18px; box-shadow: var(--bong-nho); }
@media (min-width: 768px) { .bang-gia { padding: 28px 32px; } }
.bang-gia__dau { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 16px; }
.bang-gia__dau h2 { font-size: clamp(1.4rem, 1.15rem + .9vw, 1.8rem); }
.nhan-nho { display: inline-flex; align-items: center; min-height: 28px; padding: 0 10px; border-radius: var(--bo); background: var(--do-nhat); color: var(--do-dam); font-weight: 600; font-size: .8125rem; }
.bang-gia .bang-cuon table { min-width: 0; }
.bang-gia td { color: var(--chu); }
.bang-gia__gia { font-family: var(--f-td); font-weight: 700; font-size: 1.0625rem; color: var(--do-dam) !important; width: 34%; }
.bang-gia__gia--chu { font-family: var(--f-chu); font-weight: 500; font-size: .9375rem; color: var(--chu-2) !important; }
.bang-gia__ghi-chu { margin-top: 12px; font-size: .9375rem; color: var(--chu-3); }
@media (max-width: 479px) { .bang-gia .bang-cuon thead { display: none; } .bang-gia .bang-cuon tr { display: grid; } .bang-gia .bang-cuon td { border: 0; padding: 4px 12px; } .bang-gia .bang-cuon tr td:first-child { padding-top: 12px; } .bang-gia .bang-cuon tr td:last-child { padding-bottom: 12px; border-bottom: 1px solid var(--vien); width: auto; } }
.hai-cot-the { display: grid; gap: 16px; }
@media (min-width: 768px) { .hai-cot-the { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.the-phang { background: var(--the); border: 1px solid var(--vien); border-radius: var(--bo); padding: 20px; }
.the-phang--nhan { border-top: 3px solid var(--do); }
.the-phang__tieu-de { font-size: 1.375rem; margin-bottom: 12px; }
.the-phang__tieu-de + .ds-icon { margin-top: 0; }
.the-phang * + .the-phang__tieu-de { margin-top: 22px; }

/* ---------- sản phẩm ---------- */
.luoi-sp { list-style: none; display: grid; gap: 12px; grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (min-width: 768px) { .luoi-sp { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; } }
@media (min-width: 1024px) { .luoi-sp { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
.the-sp a { display: flex; flex-direction: column; height: 100%; background: var(--the); border: 1px solid var(--vien); border-radius: var(--bo); overflow: hidden; text-decoration: none; transition: border-color .18s ease, box-shadow .18s ease; }
.the-sp a:hover { border-color: var(--vien-dam); box-shadow: var(--bong); }
.the-sp__anh { display: block; aspect-ratio: 1 / 1; background: var(--the); border-bottom: 1px solid var(--vien); padding: 8px; }
.the-sp__anh img { width: 100%; height: 100%; object-fit: contain; mix-blend-mode: multiply; }
.the-sp__ten { padding: 12px 12px 4px; font-family: var(--f-td); font-weight: 600; font-size: 1.03125rem; line-height: 1.25; color: var(--chu); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.the-sp__gia { margin-top: auto; padding: 4px 12px 14px; font-family: var(--f-td); font-weight: 700; font-size: 1.0625rem; color: var(--do-dam); }
.the-sp__gia--lien-he { color: var(--chu-3); font-weight: 600; }
.luoi-sp--dm .the-sp__anh { aspect-ratio: 4 / 3; padding: 0; }
.luoi-sp--dm .the-sp__anh img { object-fit: cover; mix-blend-mode: normal; }
.luoi-sp--dm .the-sp__gia { color: var(--do-dam); font-weight: 600; }
.anh-trong { display: block; width: 100%; height: 100%; min-height: 120px; background: repeating-linear-gradient(180deg, var(--dai) 0 10px, var(--nen) 10px 20px); }
.ghi-gia { display: flex; gap: 10px; align-items: flex-start; margin-top: 18px; padding: 12px 14px; background: var(--the); border: 1px solid var(--vien); border-radius: var(--bo); font-size: .9375rem; color: var(--chu-2); }
.ghi-gia .ic { color: var(--do-dam); width: 20px; height: 20px; margin-top: 2px; }

.sp { padding: 20px 0 36px; background: var(--soc), var(--nen); border-bottom: 1px solid var(--vien); }
.sp__luoi { display: grid; gap: 24px; }
@media (min-width: 1024px) { .sp { padding: 32px 0 52px; } .sp__luoi { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 48px; align-items: start; } }
.sp-anh__khung { display: none; background: var(--the); border: 1px solid var(--vien); border-radius: var(--bo); padding: 12px; box-shadow: var(--bong); }
.sp-anh__khung.hien { display: block; }
.sp-anh__khung img { width: 100%; aspect-ratio: 1 / 1; object-fit: contain; mix-blend-mode: multiply; }
.sp-anh__nho { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.sp-anh__nho button { width: 72px; height: 72px; padding: 4px; background: var(--the); border: 1.5px solid var(--vien); border-radius: var(--bo); cursor: pointer; }
.sp-anh__nho button[aria-current="true"] { border-color: var(--do); }
.sp-anh__nho img { width: 100%; height: 100%; object-fit: contain; mix-blend-mode: multiply; }
.sp-thong-tin__ten { font-size: clamp(1.7rem, 1.2rem + 1.8vw, 2.5rem); line-height: 1.1; text-wrap: balance; }
.sp-thong-tin__ma { margin-top: 12px; color: var(--chu-2); }
.sp-thong-tin__ma span, .sp-thong-tin__gia span { color: var(--chu-3); }
.sp-thong-tin__gia { margin-top: 10px; display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.sp-thong-tin__gia strong { font-family: var(--f-td); font-weight: 700; font-size: 2.1rem; line-height: 1.1; color: var(--do-dam); }
.sp-thong-tin__gia strong.lien-he { font-size: 1.6rem; color: var(--chu); }
.sp-thong-tin__ghi { list-style: none; margin-top: 12px; display: grid; gap: 4px; font-size: .9375rem; color: var(--chu-2); padding: 12px 14px; background: var(--the); border: 1px solid var(--vien); border-radius: var(--bo); }
.sp-thong-tin__ghi a { color: var(--do-dam); }
.sp-thong-tin__phu { list-style: none; margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--vien); display: grid; gap: 8px; font-size: .9375rem; color: var(--chu-2); }
.sp-thong-tin__phu li { display: flex; gap: 10px; align-items: center; }
.sp-thong-tin__phu .ic { color: var(--do-dam); width: 20px; height: 20px; }

/* ---------- danh sách bài ---------- */
.luoi-bai { list-style: none; display: grid; gap: 16px; }
@media (min-width: 640px) { .luoi-bai { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 1024px) { .luoi-bai { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; } }
.the-bai a { display: flex; flex-direction: column; height: 100%; background: var(--the); border: 1px solid var(--vien); border-radius: var(--bo); overflow: hidden; text-decoration: none; transition: border-color .18s ease, box-shadow .18s ease; }
.the-bai a:hover { border-color: var(--vien-dam); box-shadow: var(--bong); }
.the-bai__anh { display: block; aspect-ratio: 16 / 10; overflow: hidden; background: var(--dai); }
.the-bai__anh img { width: 100%; height: 100%; object-fit: cover; }
.the-bai__ten { padding: 14px 16px 4px; font-family: var(--f-td); font-weight: 700; font-size: 1.25rem; line-height: 1.2; color: var(--chu); }
.the-bai__tom { padding: 0 16px 16px; font-size: .9375rem; color: var(--chu-3); }

/* ---------- liên hệ ---------- */
.lien-he__luoi { display: grid; gap: 20px; }
@media (min-width: 1024px) { .lien-he__luoi { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 32px; align-items: start; } }
.lien-he__the { list-style: none; display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.lien-he__the a, .lien-he__o { display: grid; gap: 4px; height: 100%; padding: 18px; background: var(--the); border: 1px solid var(--vien); border-radius: var(--bo); text-decoration: none; color: var(--chu); }
.lien-he__the a:hover { border-color: var(--do); }
.lien-he__the .ic { width: 30px; height: 30px; color: var(--do-dam); margin-bottom: 6px; }
.lien-he__nhan { font-size: .875rem; color: var(--chu-3); }
.lien-he__the strong { font-family: var(--f-td); font-weight: 700; font-size: 1.3125rem; overflow-wrap: anywhere; }
.lien-he__dia-chi { display: flex; gap: 10px; align-items: flex-start; color: var(--chu); font-size: 1.0625rem; font-weight: 500; }
.lien-he__dia-chi .ic { color: var(--do-dam); width: 22px; height: 22px; margin-top: 2px; }
.ds-icon--dia-chi .chan-trang__nhan { color: var(--chu-3); }

/* ---------- giảm chuyển động ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}
@media print {
  .thanh-menu, .thanh-goi, .lien-he-noi, .goi-ngay, .bo-cuc-bai__ben, .nut-menu { display: none !important; }
  body { background: #fff; padding: 0; }
}

/* thông tin cửa lắp mới (00_xac-nhan #33-35) */
.dai-lap-moi { margin-top: 24px; background: var(--dai); border: 1px solid var(--vien); border-radius: var(--bo); padding: 0 16px; }
.sp-thong-tin__lap { margin-top: 20px; }