/* Phông đặt trên máy chủ mình (không tải từ Google) */
@font-face {
  font-family: 'Be Vietnam Pro';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(/phong/bvp-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(/phong/bvp-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(/phong/bvp-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: 600;
  font-display: swap;
  src: url(/phong/bvp-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(/phong/bvp-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(/phong/bvp-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(/phong/bvp-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(/phong/bvp-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(/phong/bvp-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: 800;
  font-display: swap;
  src: url(/phong/bvp-800-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: 800;
  font-display: swap;
  src: url(/phong/bvp-800-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: 800;
  font-display: swap;
  src: url(/phong/bvp-800-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;
}

:root{--brand:#9F1239;--brand-dam:#6B0F2A;--nhan:#B45309;--chu:#0F172A;--chu-phu:#334155;--nen:#FBF5F7;--khoi:#fff;--vien:#94A3B8;
--co-ten:clamp(34px,4.6vw,56px);--co-h2:28px;--co-h3:19px;--co-than:16px;--co-nho:14px;--rong-menu:260px}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;background:var(--nen);color:var(--chu);font:400 var(--co-than)/1.65 "Be Vietnam Pro",system-ui,sans-serif}
a{color:var(--brand-dam);font-weight:700;overflow-wrap:anywhere}
:focus-visible{outline:3px solid var(--nhan);outline-offset:2px}
.so{display:inline-grid;place-items:center;min-width:28px;height:28px;padding:0 6px;border-radius:999px;background:var(--brand);color:#fff;font-weight:800;font-size:var(--co-nho);flex:none}
.menu{position:fixed;inset:0 auto 0 0;width:var(--rong-menu);background:var(--brand-dam);color:#fff;display:flex;flex-direction:column;overflow-y:auto;z-index:20}
.menu .ten{padding:28px 20px 20px;border-bottom:1px solid #8E3A52}
.menu .ten b{display:block;font-size:22px;font-weight:800;line-height:1.25}
.menu .ten span{display:block;margin-top:8px;font-size:var(--co-nho);font-weight:600;color:#E2E8F0}
.menu ol{list-style:none;margin:0;padding:8px 0}
.menu a{display:flex;align-items:center;gap:10px;min-height:48px;padding:0 20px;color:#fff;text-decoration:none;font-weight:600;border-left:4px solid transparent}
.menu a:hover,.menu a:focus-visible{background:#9F1239;border-left-color:#FBCFE8;outline:none}
.menu .so{background:#fff;color:var(--brand-dam)}
.menu .mxh{margin-top:auto;padding:16px 20px;border-top:1px solid #8E3A52;display:grid;gap:4px;font-size:var(--co-nho)}
.menu .mxh a{min-height:44px;padding:0;border:0}
.thong-ke{margin:8px 16px 0;border:1px solid #8E3A52;border-radius:12px;padding:12px 14px;font-size:var(--co-nho)}
.thong-ke b.tieu{display:block;font-size:15px;margin-bottom:6px;color:#FBCFE8}
.thong-ke dl{margin:0;display:grid;grid-template-columns:1fr auto;gap:4px 10px}.thong-ke dt{color:#E2E8F0;font-weight:600}.thong-ke dd{margin:0;font-weight:800;text-align:right}
.mo-menu{display:none}
main{margin-left:var(--rong-menu);padding:16px;display:grid;gap:16px;max-width:calc(1180px + var(--rong-menu))}
.khoi{background:var(--khoi);border:1px solid var(--vien);border-radius:12px;padding:28px}
.khoi>h2{display:flex;align-items:center;gap:10px;margin:0 0 6px;font-size:var(--co-h2);font-weight:800}
.khoi>.dan{margin:0 0 18px;padding-bottom:12px;border-bottom:2px solid var(--brand);color:var(--chu-phu);font-weight:600}
.tieu-muc{display:flex;align-items:center;gap:8px;margin:24px 0 12px;font-size:20px;font-weight:800}
.dau{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);gap:28px;align-items:center}
.dau img{width:100%;aspect-ratio:4/5;height:auto;object-fit:cover;object-position:center 15%;border-radius:12px;border:1px solid var(--vien)}
.nho-tren{color:var(--nhan);font-weight:800;margin:0}
.dau h1{font-size:var(--co-ten);line-height:1.1;margin:6px 0 10px;font-weight:800;color:var(--brand-dam)}
.vai{font-size:20px;font-weight:800;margin:0 0 12px}
.dau p{color:var(--chu-phu)}
.hang-nut{display:flex;gap:12px;flex-wrap:wrap}
.nut{font:inherit;font-weight:700;display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 20px;border-radius:12px;text-decoration:none;border:2px solid var(--brand);cursor:pointer}
.nut.chinh{background:var(--brand);color:#fff}.nut.phu{background:#fff;color:var(--brand)}
.so-lieu{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-top:20px}
.so-lieu div{border:1px solid var(--vien);border-radius:12px;padding:12px}
.so-lieu b{display:block;font-size:26px;font-weight:800;color:var(--brand-dam)}.so-lieu span{font-size:var(--co-nho);color:var(--chu-phu)}
.luoi{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.the{border:1px solid var(--vien);border-radius:12px;padding:18px;min-width:0;display:flex;flex-direction:column;gap:8px}
.the h3{margin:0;font-size:var(--co-h3);font-weight:800;display:flex;gap:8px;align-items:flex-start}
.the p{margin:0;color:var(--chu-phu)}
.the img{width:100%;height:auto;aspect-ratio:3/2;object-fit:cover;border-radius:8px;border:1px solid var(--vien)}
ol.dong{margin:0;padding-left:22px;display:grid;gap:6px;color:var(--chu-phu)}
.cau-noi{font-size:22px;font-weight:700;line-height:1.5;color:var(--brand-dam);border-left:4px solid var(--nhan);padding:4px 0 4px 18px;margin:0 0 8px;max-width:60ch}
ol.moc{list-style:none;margin:0;padding:0}
ol.moc li{display:grid;grid-template-columns:130px minmax(0,1fr);gap:16px;padding:12px 0;border-top:1px solid var(--vien)}
ol.moc b{color:var(--brand-dam);font-size:18px}
.chu-thich{font-size:var(--co-nho);color:var(--chu-phu);font-weight:600;margin:12px 0 0}
blockquote.the{margin:0}blockquote.the p{color:var(--chu);font-style:italic}
blockquote footer{font-weight:700;font-size:var(--co-nho);color:var(--brand-dam)}
.ds-bai{display:grid;gap:12px}
.bai{border:1px solid var(--vien);border-radius:12px;padding:16px;min-width:0}
.bai h3{margin:4px 0 6px;font-size:var(--co-h3);font-weight:800;display:flex;gap:8px;align-items:flex-start}
.bai>p{margin:0 0 8px;color:var(--chu-phu)}
.bai>p.meta{font-size:var(--co-nho);font-weight:700;color:var(--chu-phu);display:flex;flex-wrap:wrap;gap:4px 14px}
.nhom{font-size:var(--co-nho);font-weight:700;color:var(--nhan)!important;margin:0!important}
details summary{display:inline-flex;align-items:center;min-height:44px;padding:0 16px;border:2px solid var(--brand);border-radius:12px;font-weight:700;color:var(--brand);cursor:pointer;list-style:none}
details summary::-webkit-details-marker{display:none}
.toan-van{max-width:70ch;margin-top:12px}.toan-van p{margin:0 0 12px}
.chuyen-muc{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 16px;padding:0;list-style:none}
.chuyen-muc li{border:1px solid var(--vien);border-radius:12px;padding:8px 14px;font-weight:700;font-size:var(--co-nho)}
form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
label{display:grid;gap:4px;font-weight:700;font-size:var(--co-nho)}
input,select,textarea{font:inherit;min-height:44px;padding:8px 12px;border:1px solid var(--vien);border-radius:12px;color:var(--chu);background:#fff}
.ca-hang{grid-column:1/-1}
.cuoi-muc{margin:20px 0 0}
.the .nut{align-self:flex-start;margin-top:auto}
.nhan-bai{margin-top:20px;padding-top:16px;border-top:1px solid var(--vien)}
.dong-hanh{margin:16px 0 0;color:var(--chu-phu);font-size:var(--co-nho);line-height:1.8}
.luoi.hai-cot{grid-template-columns:minmax(0,1.3fr) minmax(0,1fr)}
.chan{margin-left:var(--rong-menu);padding:20px 16px 28px;font-size:var(--co-nho);color:var(--chu-phu)}
@media (max-width:1100px){.luoi{grid-template-columns:repeat(2,minmax(0,1fr))}.so-lieu{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:1023px){
  .mo-menu{display:flex;position:sticky;top:0;z-index:30;align-items:center;justify-content:space-between;gap:12px;background:var(--brand-dam);color:#fff;padding:0 16px;min-height:56px}
  .mo-menu b{font-size:18px}
  .mo-menu label{display:inline-flex;align-items:center;min-height:44px;padding:0 14px;border:2px solid #fff;border-radius:12px;color:#fff;font-size:var(--co-nho);cursor:pointer}
  #bat-menu:checked~.menu{transform:none}
  .menu{transform:translateX(-100%);transition:transform .2s;top:56px;width:min(300px,85vw)}
  main,.chan{margin-left:0}
}
@media (max-width:640px){
  .dau,.luoi,.luoi.hai-cot,form{grid-template-columns:minmax(0,1fr)}
  .dau img{aspect-ratio:4/3;object-position:center 12%}
  .khoi{padding:18px} main{padding:12px}
  ol.moc li{grid-template-columns:minmax(0,1fr);gap:2px}
  .cau-noi{font-size:19px}
}
@media (prefers-reduced-motion:reduce){.menu{transition:none}html{scroll-behavior:auto}}

/* Sang trọng (13/10/2026): 4 cỡ chữ 52·26·20·17, 3 màu chữ (đen đậm · xanh đậm · trắng), dòng ≤ 70 ký tự */
:root{--co-ten:clamp(34px,4.2vw,52px);--co-h2:26px;--co-h3:20px;--co-than:17px;--co-nho:17px;--chu-phu:#0F172A;--nhan:var(--brand-dam)}
body{font-size:17px}
.so{font-size:15px;min-width:30px;height:30px}
.menu .ten b,.vai,.cau-noi,.tieu-muc,.mo-menu b,.thong-ke b.tieu{font-size:20px}
.so-lieu b{font-size:26px}
.menu .ten span,.thong-ke dt{color:#fff}
.thong-ke b.tieu{color:#fff}
.khoi p,.khoi li,.dong-hanh,.khoi>.dan,ol.moc span,.toan-van{max-width:70ch}
.dau p{max-width:60ch}
a{color:var(--brand-dam)}
.nut.phu{color:var(--brand-dam)}
details summary{color:var(--brand-dam)}
.so{font-size:15px}
.so{font-size:17px!important}
ol.moc b{font-size:20px}
.khoi p,.khoi li,.dong-hanh,.khoi>.dan,ol.moc span,.toan-van,.cau-noi{max-width:36em}
.dau p{max-width:34em}
*{--brand-chu:var(--brand-dam)}
.khoi>h2,.the h3,.bai h3,h3{color:#0F172A}

.tu-khoa{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.tinh-cach{font-weight:700;color:#0F172A!important}
.dang-xin{font-style:italic}
@media (max-width:1023px){.tu-khoa{grid-template-columns:minmax(0,1fr)}}

/* Menu ngang trên máy tính (anh Hai hỏi 13/10/2026: các trang chuyên gia lớn đều dùng menu ngang) */
@media (min-width:1024px){
  .menu{position:fixed;top:0;left:0;right:0;bottom:auto;width:auto;height:auto;flex-direction:row;align-items:center;gap:8px;padding:0 24px;overflow:visible}
  .menu .ten{padding:0;border:0;margin-right:auto;white-space:nowrap}
  .menu .ten span{display:none}
  .menu ol{display:flex;flex-wrap:nowrap;padding:0}
  .menu a{white-space:nowrap}
  .menu a{min-height:64px;padding:0 12px;border-left:0;border-bottom:4px solid transparent}
  .menu a:hover,.menu a:focus-visible{border-bottom-color:currentColor}
  .menu .thong-ke,.menu .mxh{display:none}
  main{margin:0 auto;max-width:1212px;padding-top:80px}
  .khoi{scroll-margin-top:80px}
  .chan{margin-left:0}
}
.chan-khoi{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:16px;max-width:1212px;margin:0 auto;padding:0 16px}
.chan-khoi .thong-ke{margin:0;background:var(--brand-dam);color:#fff}
.chan-khoi .mxh{display:grid;gap:4px;align-content:start}
.chan-khoi .mxh a{min-height:44px;display:flex;align-items:center}
@media (max-width:640px){.chan-khoi{grid-template-columns:minmax(0,1fr)}}
@media (max-width:1023px){.khoi{scroll-margin-top:68px}}

/* Tinh tế (chị Như 13/10/2026): chân trang nhẹ, bớt chữ */
.ra{display:inline-block;vertical-align:middle;margin-left:2px}
.chan-khoi{grid-template-columns:auto minmax(0,1fr);align-items:center;gap:24px 40px;padding:24px 16px;border-top:1px solid var(--vien);margin-top:24px}
.chan-khoi .thong-ke{background:transparent;color:var(--chu);border:0;padding:0;font-size:17px}
.chan-khoi .thong-ke b.tieu{color:var(--brand-dam)!important;font-size:17px!important;font-weight:700;margin-bottom:4px}
.chan-khoi .thong-ke dl{grid-template-columns:auto auto auto auto auto auto auto auto;gap:4px 8px}
.chan-khoi .thong-ke dt{color:var(--chu)!important;font-weight:400}
.chan-khoi .thong-ke dd{font-weight:700;margin-right:12px}
.chan-khoi .mxh{display:flex;flex-wrap:wrap;gap:4px 20px;justify-content:flex-end;align-items:center}
.chan-khoi .mxh a{text-decoration:none;font-weight:600;font-size:17px}
.chan-khoi .mxh a:hover{text-decoration:underline}
.chan{border:0;padding-top:0;text-align:center;font-size:17px}
@media (max-width:1023px){.chan-khoi{grid-template-columns:minmax(0,1fr)}.chan-khoi .thong-ke dl{grid-template-columns:auto auto auto auto}.chan-khoi .mxh{justify-content:flex-start}}
@media (max-width:640px){.dau>div{display:flex;flex-direction:column}.dau .hang-nut{order:-1;margin:0 0 12px}.dau .nho-tren{order:-3}.dau h1{order:-2}.dau .vai{order:-2}}
/* Gọn điện thoại: độ dài ≤ 15 màn */
@media (max-width:640px){.the img{aspect-ratio:16/9}main{gap:12px}.khoi{padding:16px}.khoi>.dan{margin-bottom:12px}.luoi{gap:12px}.the{padding:14px}.bai>p:not(.meta):not(.nhom){display:none}}

main{grid-template-columns:minmax(0,1fr)}
main>section{min-width:0}
.thu-vien{max-width:100%;display:flex;gap:12px;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:8px;-webkit-overflow-scrolling:touch}
.thu-vien:focus-visible{outline:3px solid var(--brand-dam)}
.tv{margin:0;flex:0 0 auto;height:360px;scroll-snap-align:start}
.tv img{height:100%;width:auto;display:block;border-radius:12px;border:1px solid var(--vien)}
@media (max-width:640px){.tv{height:240px}}

.chuyen-muc li{padding:0}
.chuyen-muc a{display:inline-flex;align-items:center;min-height:44px;padding:0 14px;text-decoration:none}