/* TAuto — trang chủ. Màu "giấy – mực – son", sửa một chỗ ở :root. */
:root {
  --giay: #f4eee2;        /* nền chính */
  --giay-sang: #fbf8f2;   /* mục xen kẽ */
  --trang: #ffffff;
  --muc: #1f1b16;         /* chữ chính */
  --muc-2: #3f3830;       /* chữ phụ (vẫn đậm, dễ đọc) */
  --muc-3: #5f564c;       /* chữ nhỏ */
  --son: #b3261e;         /* đỏ son */
  --son-dam: #8e1c16;
  --vach: #d6c9b4;        /* đường kẻ */
  --vach-nhat: #e6ddcd;
  --den: #1d1915;         /* nền tối */
  --rong: 1140px;
  --chu: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
  --chu-co-chan: "Noto Serif", Georgia, "Times New Roman", serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: var(--chu); font-size: 17px; line-height: 1.6; color: var(--muc); background: var(--giay); }
h1, h2, h3, h4 { margin: 0 0 .45em; color: var(--muc); line-height: 1.22; }
h1, h2 { font-family: var(--chu-co-chan); font-weight: 700; }
p { margin: 0 0 1em; }
a { color: var(--son); text-decoration: underline; text-underline-offset: 3px; }
a:hover { color: var(--son-dam); }
code { font-family: Consolas, "Courier New", monospace; font-size: .9em; background: #ece3d3; padding: .1em .35em; border-radius: 3px; }
[hidden] { display: none !important; }
.nw { white-space: nowrap; }   /* tên game không bị cắt giữa dòng */
:focus-visible { outline: 3px solid var(--son); outline-offset: 2px; }
img { max-width: 100%; height: auto; }

.khung { width: 100%; max-width: var(--rong); margin: 0 auto; padding: 0 24px; }
.ic { width: 22px; height: 22px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.bo-qua { position: absolute; left: -999px; top: 8px; z-index: 100; background: var(--son); color: #fff; padding: 8px 14px; font-weight: 600; }
.bo-qua:focus { left: 12px; }

/* ---------- nút ---------- */
.nut { display: inline-flex; align-items: center; justify-content: center; gap: 9px; padding: 10px 18px; border: 2px solid transparent; border-radius: 4px;
  font: 600 16px/1.2 var(--chu); text-decoration: none; cursor: pointer; transition: background-color .15s, color .15s, border-color .15s; }
.nut--son { background: var(--son); color: #fff; }
.nut--son:hover { background: var(--son-dam); color: #fff; }
.nut--nhat { background: var(--giay-sang); color: var(--muc); border-color: var(--vach); }
.nut--nhat:hover { border-color: var(--muc); color: var(--muc); }
.nut--lon { padding: 13px 24px; font-size: 18px; }
.nut--rong { width: 100%; }

/* ---------- dòng trên cùng ---------- */
.thanh-tren { background: var(--den); color: #e7dece; font-size: 14px; }
.thanh-tren__trong { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 4px 24px; padding-top: 7px; padding-bottom: 7px; }
.thanh-tren b { color: #fff; }
.thanh-tren a { color: #fff; }

/* ---------- đầu trang ---------- */
.dau { position: sticky; top: 0; z-index: 50; background: var(--giay-sang); border-bottom: 1px solid var(--vach); }
.dau__trong { display: flex; align-items: center; gap: 20px; min-height: 68px; }
.logo { display: inline-flex; align-items: center; gap: 12px; color: var(--muc); text-decoration: none; margin-right: auto; }
.logo:hover { color: var(--muc); }
.an { display: grid; place-items: center; width: 40px; height: 40px; flex: none; background: var(--son); color: #fdf2e6; border-radius: 3px;
  font: 700 25px/1 var(--chu-co-chan); box-shadow: inset 0 0 0 3px var(--son), inset 0 0 0 4.5px #f2d4c8; }
.logo__chu { display: flex; flex-direction: column; line-height: 1.15; }
.logo__chu b { font: 700 22px/1.1 var(--chu-co-chan); }
.logo__chu small { font-size: 13px; color: var(--muc-3); white-space: nowrap; }
.menu { display: flex; gap: 2px; }
.menu a { color: var(--muc-2); font-weight: 600; font-size: 16px; padding: 8px 11px; text-decoration: none; white-space: nowrap; border-bottom: 2px solid transparent; }
.menu a:hover { color: var(--son); }
.menu a.dang-xem { color: var(--muc); border-bottom-color: var(--son); }
.dau__tai { white-space: nowrap; }
.nut-menu { display: none; width: 44px; height: 44px; border: 1px solid var(--vach); border-radius: 4px; background: transparent; color: var(--muc); cursor: pointer; align-items: center; justify-content: center; }
.nut-menu .ic--dong { display: none; }
.nut-menu[aria-expanded="true"] .ic--mo { display: none; }
.nut-menu[aria-expanded="true"] .ic--dong { display: block; }

/* ---------- đầu trang chính ---------- */
.hero { border-bottom: 1px solid var(--vach); }
.hero__trong { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 48px; align-items: center; padding-top: 64px; padding-bottom: 64px; }
.hero__tren { display: flex; align-items: flex-start; gap: 12px; color: var(--son); font-weight: 700; font-size: 15px; letter-spacing: .3px; margin-bottom: 18px; text-wrap: balance; }
.hero__tren::before { content: ""; flex: none; width: 32px; height: 2px; margin-top: calc(.8em - 1px); background: var(--son); }   /* gạch đỏ giữa dòng đầu khi chữ xuống dòng */
.hero h1 { font-size: clamp(34px, 3.9vw, 46px); letter-spacing: -.3px; margin-bottom: 22px; text-wrap: balance; }
.hero h1 .chu-son { color: var(--son); }
.hero__mo { font-size: 19px; color: var(--muc-2); max-width: 33em; }
/* ba biểu tượng Facebook / YouTube / Zalo: link lấy từ cau-hinh.js */
.mxh { list-style: none; margin: 30px 0 18px; padding: 0; display: flex; flex-wrap: wrap; gap: 12px; }
.mxh a { display: inline-flex; align-items: center; gap: 10px; padding: 9px 18px 9px 11px; border: 1px solid var(--vach); border-radius: 4px;
  background: var(--giay-sang); color: var(--muc); font-weight: 600; font-size: 17px; text-decoration: none; transition: border-color .15s; }
.mxh a:hover { border-color: var(--muc); color: var(--muc); }
.mxh__ic { width: 28px; height: 28px; flex: none; }
.hero__link { font-size: 16px; color: var(--muc-3); margin: 0; }

/* ảnh cửa sổ TAuto thật: hai cửa sổ chồng lệch, giữ đúng cỡ gốc cho chữ nét */
.anh-tauto { margin: 0; display: grid; justify-items: start; }
.anh-tauto img { grid-area: 1 / 1; width: 411px; max-width: none; display: block; border: 1px solid #a99c87; box-shadow: 0 2px 4px rgba(31, 27, 22, .12), 0 16px 34px rgba(31, 27, 22, .2); background: #f0f0f0; }
.anh-tauto__truoc { margin: 40px 0 0 150px; }
.anh-tauto figcaption { grid-area: 2 / 1; margin-top: 14px; font-size: 14px; color: var(--muc-3); }

/* ---------- mục chung ---------- */
.muc { padding: 76px 0; }
.muc--trang { background: var(--giay-sang); border-top: 1px solid var(--vach-nhat); border-bottom: 1px solid var(--vach-nhat); }
.muc--muc { background: var(--den); color: #ddd3c3; }
.muc--muc h2, .muc--muc h3 { color: #fbf3e6; }
.muc__dau { max-width: 760px; margin-bottom: 40px; }
.muc__dau h2 { font-size: clamp(28px, 3.3vw, 38px); padding-top: 20px; position: relative; }
.muc__dau h2::before { content: ""; position: absolute; left: 0; top: 0; width: 44px; height: 4px; background: var(--son); }
.muc__dau p { font-size: 18px; color: var(--muc-2); margin: 0; }
.muc--muc .muc__dau p { color: #d5cab8; }

/* bảng tính năng: hai cột có kẻ dòng */
.bang-tn { margin: 0; border-bottom: 1px solid var(--vach); }
.bang-tn > div { display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 32px; padding: 24px 0; border-top: 1px solid var(--vach); }
.bang-tn dt { font: 700 21px/1.3 var(--chu-co-chan); color: var(--muc); }
.bang-tn dd { margin: 0; }
.bang-tn dd p { margin: 0; color: var(--muc-2); }
.bang-tn .ds { margin-top: 8px; color: var(--muc); font-weight: 600; font-size: 16px; }

/* điểm khác */
.diem { list-style: none; counter-reset: d; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 32px; }
.diem li { counter-increment: d; border-top: 2px solid var(--son); padding-top: 16px; }
.diem li::before { content: "0" counter(d); display: block; font: 700 30px/1 var(--chu-co-chan); color: #e8695f; margin-bottom: 12px; }
.diem h3 { font-size: 20px; }
.diem p { margin: 0; font-size: 16px; color: #d5cab8; }

/* ---------- tải về ---------- */
.tai { display: grid; grid-template-columns: 380px minmax(0, 1fr); gap: 48px; align-items: start; }
.tai__hop { background: var(--trang); border: 1px solid var(--vach); border-top: 4px solid var(--son); padding: 26px 28px 28px; }
.tai__ten { font: 700 24px/1.2 var(--chu-co-chan); margin: 0 0 4px; }
.tai__ban { font-size: 15px; color: var(--muc-3); margin: 0 0 18px; min-height: 1em; }
.tai__nut { display: grid; gap: 10px; }
.tai__phu { margin: 10px 0 0; font-size: 15px; text-align: center; }
.tai__hop h3 { font-size: 17px; margin: 24px 0 8px; }
.ds-gon { margin: 0; padding: 0; list-style: none; display: grid; gap: 6px; font-size: 16px; color: var(--muc-2); }
.ds-gon li { position: relative; padding-left: 20px; }
.ds-gon li::before { content: ""; position: absolute; left: 2px; top: .62em; width: 7px; height: 7px; background: var(--son); }

.buoc { list-style: none; counter-reset: b; margin: 0; padding: 0; display: grid; gap: 22px; }
.buoc li { counter-increment: b; display: grid; grid-template-columns: 52px minmax(0, 1fr); }
.buoc li::before { content: counter(b) "."; font: 700 30px/1.1 var(--chu-co-chan); color: var(--son); }
.buoc h3 { font-size: 19px; margin-bottom: 4px; }
.buoc p { margin: 0; color: var(--muc-2); }
.buoc li > * { grid-column: 2; }

/* ---------- bảng giá ---------- */
.gia { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); background: var(--trang); border: 1px solid var(--vach); }
.goi { display: flex; flex-direction: column; padding: 40px 26px 28px; border-left: 1px solid var(--vach); position: relative; }
.goi:first-child { border-left: 0; }
.goi--noi { background: #fff8f3; box-shadow: inset 0 4px 0 var(--son); }
.goi__nhan { position: absolute; top: 14px; left: 26px; font-size: 14px; font-weight: 700; color: var(--son); margin: 0; }
.goi h3 { font: 700 22px/1.2 var(--chu-co-chan); margin-bottom: 4px; }
.goi__mo { font-size: 15px; color: var(--muc-3); margin: 0 0 16px; }
.goi__gia { font: 700 34px/1.1 var(--chu-co-chan); margin: 0 0 18px; }
.goi__gia small { font: 600 15px var(--chu); color: var(--muc-3); }
.goi .ds-gon { margin-bottom: 24px; flex: 1; align-content: start; }

/* ---------- hướng dẫn ---------- */
.hd { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 56px; align-items: start; }
/* thẻ dẫn sang trang Hướng dẫn sử dụng (huong-dan.html) */
.hd-the { background: var(--trang); border: 1px solid var(--vach); border-top: 4px solid var(--son); padding: 24px 26px 26px; }
.hd-the__mo { font-size: 17px; color: var(--muc-2); }
.hd-the__ds { margin: 0 0 22px; padding: 0; }
.hoi-dap__ten { font: 700 22px/1.2 var(--chu-co-chan); margin-bottom: 8px; }
.hoi-dap details { border-bottom: 1px solid var(--vach); }
.hoi-dap summary { cursor: pointer; list-style: none; padding: 14px 36px 14px 0; font-weight: 700; position: relative; }
.hoi-dap summary::-webkit-details-marker { display: none; }
.hoi-dap summary::after { content: "+"; position: absolute; right: 4px; top: 10px; font: 400 24px/1 var(--chu); color: var(--son); }
.hoi-dap details[open] summary::after { content: "–"; }
.hoi-dap details p { margin: 0; padding: 0 0 16px; color: var(--muc-2); }

/* ---------- tin tức + cột hỗ trợ ---------- */
.tin { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 48px; align-items: start; }
.tin__ds { border-bottom: 1px solid var(--vach); }
.bai { padding: 22px 0; border-top: 1px solid var(--vach); }
.bai__meta { font-size: 14px; color: var(--muc-3); margin-bottom: 4px; }
.bai__cm { color: var(--son); font-weight: 700; }
.bai h3 { font: 700 22px/1.3 var(--chu-co-chan); margin-bottom: 6px; }
.bai h3 a { color: var(--muc); text-decoration: none; }
.bai h3 a:hover { color: var(--son); }
.bai p { margin: 0; color: var(--muc-2); }
.bai__them { display: inline-block; margin-top: 8px; font-weight: 600; font-size: 16px; }
.cot { display: grid; gap: 24px; }
.hop { background: var(--trang); border: 1px solid var(--vach); }
.hop__ten { margin: -1px -1px 0; padding: 10px 16px; background: var(--son); color: #fff; font: 700 15px/1.3 var(--chu); text-transform: uppercase; letter-spacing: .5px; }
.hop > ul, .hop__ghi { margin: 0; padding: 4px 16px; }
.hop__ghi { padding: 10px 16px 14px; font-size: 15px; color: var(--muc-3); }
.nhanh { list-style: none; }
.nhanh li + li { border-top: 1px dashed var(--vach); }
.nhanh a { display: block; padding: 10px 0; color: var(--muc); font-weight: 600; text-decoration: none; }
.nhanh a::before { content: "›"; color: var(--son); font-weight: 700; margin-right: 8px; }
.nhanh a:hover { color: var(--son); }

/* ---------- liên hệ ---------- */
.lh { list-style: none; margin: 0; padding: 0; }
.lh a { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.lh__ic { color: var(--son); display: inline-flex; }
.lh__ic--fb .ic { fill: currentColor; stroke: none; }
.lh b { display: block; font-size: 16px; }
.lh small { display: block; font-size: 15px; word-break: break-word; }
.lh__trong { padding: 10px 0; color: var(--muc-3); }
.lh--doc li + li { border-top: 1px dashed var(--vach); }
.lh--doc a { padding: 10px 0; color: var(--muc); }
.lh--doc small { color: var(--muc-3); }
.lh--ngang { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); border: 1px solid #4a4239; }
.lh--ngang li { border-left: 1px solid #4a4239; }
.lh--ngang li:first-child { border-left: 0; }
.lh--ngang a { padding: 18px 20px; color: #fbf3e6; }
.lh--ngang a:hover { background: #2a251f; color: #fff; }
.lh--ngang .lh__ic { color: #ef8a80; }
.lh--ngang small { color: #d5cab8; }
.lh--ngang .lh__trong { padding: 18px 20px; color: #d5cab8; }

/* ---------- chân trang ---------- */
.chan { background: var(--den); color: #cdc2b1; padding-top: 52px; border-top: 1px solid #3a332b; }
.chan__trong { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 32px; padding-bottom: 36px; }
.logo--chan { color: #fbf3e6; margin-right: 0; }
.logo--chan:hover { color: #fbf3e6; }
.logo--chan .logo__chu small { color: #bdb2a1; }
.chan__gt { margin: 14px 0 0; max-width: 360px; font-size: 16px; }
.chan__cot { display: flex; flex-direction: column; gap: 8px; }
.chan__cot h4 { color: #fbf3e6; font-size: 16px; margin-bottom: 4px; }
.chan__cot a { color: #e2d8c8; font-size: 16px; text-decoration: none; }
.chan__cot a:hover { color: #fff; text-decoration: underline; }
.chan__duoi { border-top: 1px solid #3a332b; padding-top: 18px; padding-bottom: 26px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 6px 24px; font-size: 14px; }
.chan__duoi p { margin: 0; }

/* ---------- trang hướng dẫn (huong-dan.html) ---------- */
.menu a[aria-current="page"] { color: var(--muc); border-bottom-color: var(--son); }
.hd-dau { background: var(--giay-sang); border-bottom: 1px solid var(--vach); }
.hd-dau__trong { padding-top: 40px; padding-bottom: 44px; }
.duong-dan { margin: 0 0 14px; font-size: 15px; color: var(--muc-3); }
.duong-dan a { color: var(--muc-3); }
.hd-dau h1 { font-size: clamp(32px, 3.6vw, 44px); letter-spacing: -.2px; margin-bottom: 14px; }
.hd-dau__mo { max-width: 46em; font-size: 18px; color: var(--muc-2); }
.meo { max-width: 46em; margin: 0; padding: 12px 16px; background: var(--trang); border: 1px solid var(--vach); border-left: 4px solid var(--son); font-size: 16px; color: var(--muc-2); }
.meo b { color: var(--muc); }
.muc-luc { margin-top: 32px; padding: 20px 26px 22px; background: var(--trang); border: 1px solid var(--vach); }
.muc-luc h2 { margin-bottom: 8px; font: 700 15px/1.3 var(--chu); color: var(--son); text-transform: uppercase; letter-spacing: .5px; }
.muc-luc ol { margin: 0; padding: 0; list-style: none; counter-reset: ml; columns: 3 230px; column-gap: 32px; }
.muc-luc li { counter-increment: ml; break-inside: avoid; padding: 4px 0; }
.muc-luc a { color: var(--muc); font-weight: 600; text-decoration: none; }
.muc-luc a::before { content: counter(ml) "."; display: inline-block; min-width: 2em; color: var(--son); font-weight: 700; }
.muc-luc a:hover { color: var(--son); }

.hd-muc { padding: 56px 0; border-top: 1px solid var(--vach); }
.hd-muc:first-child { border-top: 0; }
.hd-muc > h2 { display: flex; align-items: baseline; gap: 14px; font-size: clamp(26px, 3vw, 34px); }
.so-muc { font: 700 .8em/1 var(--chu-co-chan); color: var(--son); }
.hd-muc > p { max-width: 46em; color: var(--muc-2); }
.hd-muc > p b { color: var(--muc); }
.hd-muc h3 { font-size: 20px; }
.hd-muc > h3 { margin-top: 34px; }
.hd-muc .buoc { margin: 22px 0; max-width: 46em; }
.buoc--tiep { counter-reset: b 2; }   /* đánh số tiếp sau ảnh: 3, 4, 5 */
.buoc b { color: var(--muc); }
.ve-dau { margin: 26px 0 0 !important; font-size: 15px; }

/* ảnh TAuto + số đỏ ở hai bên ảnh (không che chữ trong ảnh) + chú thích cùng số */
.hinh { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 34px; align-items: start; margin: 26px 0; }
.hinh figure { margin: 0; min-width: 0; }
.anh-hd { position: relative; width: calc(var(--w, 411px) + 60px); max-width: 100%; padding: 0 30px; }
.anh-hd a { display: block; cursor: zoom-in; }
.anh-hd img { display: block; width: 100%; height: auto; border: 1px solid #a99c87; background: #f0f0f0;
  box-shadow: 0 2px 4px rgba(31, 27, 22, .1), 0 10px 24px rgba(31, 27, 22, .14); }
.so { position: absolute; left: 2px; transform: translateY(-50%); display: grid; place-items: center; width: 22px; height: 22px;
  border-radius: 50%; background: var(--son); color: #fff; font: 700 12px/1 var(--chu); pointer-events: none; }
.so--phai { left: auto; right: 2px; }
.hinh figcaption { margin-top: 10px; padding: 0 30px; font-size: 14px; color: var(--muc-3); }
.chu-thich { list-style: none; counter-reset: ct; margin: 0; padding: 0; display: grid; gap: 14px; }
.chu-thich li { counter-increment: ct; position: relative; padding-left: 34px; font-size: 16.5px; color: var(--muc-2); }
.chu-thich li::before { content: counter(ct); position: absolute; left: 0; top: 2px; display: grid; place-items: center; width: 22px; height: 22px;
  border-radius: 50%; background: var(--son); color: #fff; font: 700 12px/1 var(--chu); }
.chu-thich b { color: var(--muc); }
.ds-gon--hd { gap: 10px; font-size: 16.5px; max-width: 46em; }
.ds-gon--hd b { color: var(--muc); }

/* bảng các việc trong tab Nhiệm vụ */
.cuon-ngang { overflow-x: auto; border: 1px solid var(--vach); background: var(--trang); }
.bang-viec { width: 100%; border-collapse: collapse; font-size: 15.5px; }
.bang-viec th, .bang-viec td { padding: 9px 14px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--vach-nhat); }
.bang-viec thead th { background: var(--den); color: #fbf3e6; border-bottom: 0; }
.bang-viec tbody th { color: var(--muc); white-space: nowrap; }
.bang-viec td { color: var(--muc-2); }
.bang-viec td:nth-child(2) { white-space: nowrap; }
.bang-viec tbody tr:last-child > * { border-bottom: 0; }

/* menu của TAuto */
.bang-menu { margin: 22px 0 0; border-bottom: 1px solid var(--vach); }
.bang-menu > div { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 28px; padding: 16px 0; border-top: 1px solid var(--vach); }
.bang-menu dt { font: 700 19px/1.3 var(--chu-co-chan); }
.bang-menu dd { margin: 0; color: var(--muc-2); }
.bang-menu dd b { color: var(--muc); }

/* xem ảnh lớn (assets/huong-dan.js) */
.xem-anh { position: fixed; inset: 0; z-index: 200; display: flex; padding: 60px 16px 24px; overflow: auto; background: rgba(20, 17, 14, .88); cursor: zoom-out; }
.xem-anh img { flex: none; margin: auto; max-width: none; background: #f0f0f0; box-shadow: 0 10px 40px rgba(0, 0, 0, .5); }
.xem-anh__dong { position: fixed; top: 12px; right: 16px; padding: 8px 14px; border: 1px solid rgba(255, 255, 255, .5); border-radius: 4px;
  background: rgba(0, 0, 0, .6); color: #fff; font: 600 15px/1.2 var(--chu); cursor: pointer; }

/* ---------- màn hình vừa ---------- */
@media (max-width: 1100px) {
  .hinh { grid-template-columns: 1fr; gap: 22px; }
  .hero__trong { grid-template-columns: 1fr; gap: 44px; }
  .anh-tauto { justify-self: center; }
  .diem { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tai, .hd, .tin { grid-template-columns: 1fr; }
  .tin { gap: 36px; }
  .cot { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 960px) {
  .nut-menu { display: inline-flex; }
  .dau__tai { display: none; }
  .menu { display: none; position: absolute; left: 0; right: 0; top: 100%; flex-direction: column; gap: 0; padding: 4px 24px 12px; background: var(--giay-sang); border-bottom: 1px solid var(--vach); box-shadow: 0 14px 24px rgba(31, 27, 22, .14); }
  .menu.mo { display: flex; }
  .menu a { padding: 13px 0; border-bottom: 1px solid var(--vach-nhat); font-size: 17px; }
  .menu a:last-child { border-bottom: 0; }
  .menu a.dang-xem { border-bottom-color: var(--vach-nhat); color: var(--son); }
  .bang-tn > div { grid-template-columns: 200px minmax(0, 1fr); gap: 24px; }
}
@media (max-width: 680px) {
  .khung { padding: 0 16px; }
  .muc { padding: 56px 0; }
  .hero__trong { padding-top: 40px; padding-bottom: 44px; }
  .hero h1 { font-size: 30px; }
  .hero__mo { font-size: 18px; }
  .mxh { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
  .mxh a { flex-direction: column; gap: 6px; width: 100%; padding: 12px 4px 10px; font-size: 15px; }
  .anh-tauto { justify-self: stretch; }
  .anh-tauto__sau { display: none !important; }
  .anh-tauto__truoc { margin: 0; width: 100% !important; max-width: 411px !important; }
  .bang-tn > div { grid-template-columns: 1fr; gap: 6px; padding: 20px 0; }
  .diem { grid-template-columns: 1fr; gap: 26px; }
  .gia { grid-template-columns: 1fr !important; }
  .goi { border-left: 0; border-top: 1px solid var(--vach); }
  .goi:first-child { border-top: 0; }
  .cot { grid-template-columns: 1fr; }
  .chan__trong { grid-template-columns: 1fr 1fr; }
  .chan__trong > div:first-child { grid-column: 1 / -1; }
  .thanh-tren__trong { justify-content: flex-start; }
  .hd-dau__trong { padding-top: 28px; padding-bottom: 32px; }
  .hd-dau__mo { font-size: 17px; }
  .muc-luc { padding: 16px 18px 18px; }
  .hd-muc { padding: 44px 0; }
  .anh-hd { padding: 0 25px; width: calc(var(--w, 411px) + 50px); }
  .so { width: 20px; height: 20px; font-size: 11px; left: 1px; }
  .so--phai { left: auto; right: 1px; }
  .hinh figcaption { padding: 0 25px; }
  .bang-menu > div { grid-template-columns: 1fr; gap: 4px; }
  /* bảng các việc: mỗi việc một khối, không phải kéo ngang */
  .bang-viec thead { display: none; }
  .bang-viec, .bang-viec tbody, .bang-viec tr, .bang-viec th, .bang-viec td { display: block; width: 100%; }
  .bang-viec tr { padding: 11px 14px; border-bottom: 1px solid var(--vach-nhat); }
  .bang-viec tbody tr:last-child { border-bottom: 0; }
  .bang-viec th, .bang-viec td { padding: 0; border: 0; white-space: normal !important; }
  .bang-viec td:nth-child(2) { margin: 2px 0 3px; font-size: 14px; font-weight: 600; color: var(--son); }
  .bang-viec td:nth-child(2)::before { content: "Tích ở: "; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }