/* RankPier (khuôn SEO Gốc/Siêu SEO, màu xanh biển) — NỀN SÁNG, chữ lớn. Thanh dưới chạy mọi khổ: điện thoại = thanh đáy, ≥768px = dock nổi giữa đáy (không ẩn ở khổ nào). */
:root{
  --xanh:#0b7285;--xanh-dam:#085a69;--xanh-nhat:#e3f4f7;--xanh-vien:#b5dfe7;--la:#0e7a4e;--la-nhat:#e7f6ed;
  --nen:#f5f9fa;--trang:#fff;--chu:#13293d;--phu:#4c5c70;--vien:#d9e5ea;
  --vang:#f5b53d;--vang-nhat:#fff6e0;--cam:#e07b1a;--cam-nhat:#fff0e2;--do:#c93838;--do-nhat:#fdeaea;
  --bo:16px;--bong:0 1px 2px rgba(20,33,61,.06),0 6px 20px rgba(20,33,61,.06);
  --bn-cao:68px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:84px}
body{margin:0;background:var(--nen);color:var(--chu);font:400 18px/1.65 "Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;padding-bottom:calc(var(--bn-cao) + env(safe-area-inset-bottom) + 12px)}
a{color:var(--xanh);text-underline-offset:3px}
a:hover{color:var(--xanh-dam)}
img{max-width:100%;height:auto}
h1,h2,h3,h4{line-height:1.25;letter-spacing:-.01em;margin:0 0 .5em}
h1{font-size:clamp(30px,6vw,48px);font-weight:800}
h2{font-size:clamp(24px,4vw,32px);font-weight:800}
h3,.h3{font-size:21px;font-weight:700}
h4{font-size:19px;font-weight:700}
p{margin:0 0 1em}
code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.86em;background:#eef2fa;border-radius:6px;padding:.1em .35em;word-break:break-word}
pre{background:#f1f4fa;border:1px solid var(--vien);border-radius:12px;padding:14px 16px;overflow-x:auto;font-size:15px;line-height:1.55}
pre code{background:none;padding:0;font-size:inherit;word-break:normal}
.an{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.bo-qua{position:absolute;left:-999px;top:8px;background:var(--trang);padding:8px 14px;border-radius:10px;z-index:99}
.bo-qua:focus{left:8px}
.khung{max-width:1160px;margin:0 auto;padding:0 16px}
.khung-hep{max-width:780px;margin:0 auto;padding:0 16px}
.muc{padding:28px 16px}
.muc-mo{color:var(--phu)}
.muc-dau{display:flex;justify-content:space-between;align-items:baseline;gap:12px;flex-wrap:wrap}
.muc-dau a{font-weight:600;text-decoration:none}
.nhan-nho{display:inline-block;font-size:14px;font-weight:700;letter-spacing:.02em;color:var(--xanh);background:var(--xanh-nhat);border-radius:999px;padding:4px 12px;margin-bottom:14px}
.ghi-nho{font-size:15px;color:var(--phu)}
.dem-nho{font-size:.6em;vertical-align:middle;background:var(--xanh-nhat);color:var(--xanh);border-radius:999px;padding:2px 10px}

/* thanh trên */
.tb{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.94);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--vien)}
.tb-in{max-width:1160px;margin:0 auto;padding:10px 16px;display:flex;align-items:center;gap:16px}
.tb-logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--chu)}
.tb-logo svg{flex:none}
.tb-logo b{display:block;font-size:20px;font-weight:800;line-height:1.1}
.tb-logo small{display:block;font-size:13px;color:var(--phu);line-height:1.2}
.tb-nav{display:none;margin-left:auto;gap:4px}
.tb-nav a{text-decoration:none;color:var(--chu);font-weight:600;font-size:16px;padding:8px 12px;border-radius:10px}
.tb-nav a:hover,.tb-nav a.on{background:var(--xanh-nhat);color:var(--xanh-dam)}
@media(min-width:1024px){.tb-nav{display:flex}}   /* BO_HAMBURGER_v1 — bỏ .tb-mn/.hb: drawer mở từ nút Menu ở thanh dưới */

/* nút, ô nhập */
.nut{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:10px 20px;border-radius:12px;font:700 17px "Be Vietnam Pro",sans-serif;text-decoration:none;cursor:pointer;border:2px solid transparent;transition:transform .08s,background .15s}
.nut:active{transform:scale(.98)}
.nut-chinh{background:var(--xanh);color:#fff}
.nut-chinh:hover{background:var(--xanh-dam);color:#fff}
.nut-vien{background:var(--trang);color:var(--xanh-dam);border-color:var(--xanh-vien)}
.nut-vien:hover{border-color:var(--xanh);color:var(--xanh-dam)}
.nut-nho{min-height:42px;padding:6px 14px;font-size:15px}
.o-nhap{display:flex;gap:8px;background:var(--trang);border:2px solid var(--vien);border-radius:16px;padding:6px;box-shadow:var(--bong)}
.o-nhap:focus-within{border-color:var(--xanh)}
.o-nhap input{flex:1;min-width:0;border:0;outline:0;font:500 18px "Be Vietnam Pro",sans-serif;padding:8px 10px;background:transparent;color:var(--chu)}
.o-lon input{font-size:20px;padding:12px}
.o-lon .nut{min-height:54px;padding:10px 22px}
@media(max-width:480px){.o-lon{flex-direction:column}.o-lon .nut{width:100%}}
.form-d{max-width:760px;margin:18px 0 10px}

/* hero */
.hero{background:linear-gradient(180deg,#ffffff 0%,var(--nen) 100%);padding:36px 0 24px;border-bottom:1px solid var(--vien)}
.hero h1{max-width:900px}
.hero-mo{font-size:clamp(18px,2.4vw,21px);color:var(--phu);max-width:780px}
.hero-vd{font-size:16px;color:var(--phu)}
.dau-cc{background:#fff;border-bottom:1px solid var(--vien);padding:30px 0 18px}

/* thẻ */
.luoi2,.luoi3{display:grid;gap:16px;grid-template-columns:1fr}
@media(min-width:720px){.luoi2{grid-template-columns:1fr 1fr}.luoi3{grid-template-columns:1fr 1fr}}
@media(min-width:1024px){.luoi3{grid-template-columns:1fr 1fr 1fr}}
.the{display:block;background:var(--trang);border:1px solid var(--vien);border-radius:var(--bo);padding:20px;box-shadow:var(--bong);color:var(--chu);text-decoration:none}
a.the:hover{border-color:var(--xanh-vien);transform:translateY(-1px)}
.the p{color:var(--phu);margin-bottom:.6em}
.the-so{display:block;font-size:40px;font-weight:800;color:var(--xanh);line-height:1}
.the-lon h3{margin-top:8px}
.the-di{font-weight:700;color:var(--xanh);font-size:16px}
.the-cm{display:inline-block;font-size:13px;font-weight:700;color:var(--xanh);text-transform:uppercase;letter-spacing:.04em;margin-bottom:6px}
.the-bai h3,.the-bai .h3{font-size:19px}

.bang-ts{display:grid;grid-template-columns:1fr;gap:8px;margin:16px 0}
@media(min-width:720px){.bang-ts{grid-template-columns:1fr 1fr}}
@media(min-width:1024px){.bang-ts{grid-template-columns:1fr 1fr 1fr 1fr}}
.bang-ts a{display:flex;justify-content:space-between;gap:10px;background:var(--trang);border:1px solid var(--vien);border-radius:12px;padding:10px 14px;text-decoration:none;color:var(--chu);font-size:16px}
.bang-ts b{color:var(--xanh);font-size:18px}
.bang-ts a:hover{border-color:var(--xanh)}

.sieu{display:flex;flex-direction:column;gap:16px;background:linear-gradient(135deg,#e6f6f9,#fffaf0);border:1px solid var(--xanh-vien);border-radius:20px;padding:24px}
.sieu p{color:var(--phu);margin:0}
@media(min-width:900px){.sieu{flex-direction:row;align-items:center;justify-content:space-between}.sieu>.nut{flex:none}}
.sieu-nho{display:block}
.sieu-nho .form-d{margin:12px 0 0}

.hoi details{background:var(--trang);border:1px solid var(--vien);border-radius:14px;margin-bottom:10px;padding:2px 18px}
.hoi summary{cursor:pointer;font-weight:700;padding:14px 0;list-style:none}
.hoi summary::-webkit-details-marker{display:none}
.hoi summary::after{content:"+";float:right;color:var(--xanh);font-size:22px;line-height:1}
.hoi details[open] summary::after{content:"–"}
.hoi details p{color:var(--phu)}

.bao{border-radius:14px;padding:14px 16px;margin:12px 0;font-size:17px}
.bao-do{background:var(--do-nhat);border:1px solid #f3c2c2;color:#7d1f1f}
.bao-vang{background:var(--vang-nhat);border:1px solid #f4dc9e;color:#6a4b00}
.bao-xanh{background:var(--xanh-nhat);border:1px solid var(--xanh-vien);color:#164d33}

/* kết quả */
.kq-dau{display:flex;flex-direction:column;gap:18px;align-items:flex-start}
@media(min-width:720px){.kq-dau{flex-direction:row;align-items:center;gap:28px}}
.vong-diem a{position:relative;display:block;width:168px;height:168px;text-decoration:none;color:var(--chu)}
.vong-diem svg{width:100%;height:100%;transform:rotate(-90deg)}
.vd-nen{fill:none;stroke:#e6ebf5;stroke-width:12}
.vd-chay{fill:none;stroke-width:12;stroke-linecap:round;transition:stroke-dashoffset .8s}
.vd-tot .vd-chay{stroke:var(--la)}.vd-kha .vd-chay{stroke:#5aa832}.vd-can .vd-chay{stroke:var(--cam)}.vd-yeu .vd-chay{stroke:var(--do)}
.vong-diem b{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:46px;font-weight:800;padding-bottom:14px}
.vong-diem small{position:absolute;left:0;right:0;bottom:44px;text-align:center;color:var(--phu);font-size:15px}
.kq-tt h1,.kq-h1{font-size:clamp(26px,4.4vw,38px);word-break:break-word}
.xl{display:inline-block;vertical-align:middle;font-size:16px;font-weight:700;border-radius:999px;padding:3px 12px}
.xl-tot{background:var(--la-nhat);color:#095c3a}.xl-kha{background:#eef7e3;color:#3d6b17}.xl-can{background:var(--cam-nhat);color:#8a4700}.xl-yeu{background:var(--do-nhat);color:#8b1d1d}
.kq-luc,.kq-dem{color:var(--phu);font-size:15px;margin:.2em 0 .8em}
.chip-hang{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}
.chip{display:inline-flex;gap:6px;align-items:center;border-radius:999px;padding:7px 14px;font-size:16px;text-decoration:none;border:1px solid var(--vien);background:var(--trang);color:var(--chu);min-height:40px}
.chip-do{background:var(--do-nhat);border-color:#f3c2c2;color:#7d1f1f}
.chip-cam{background:var(--cam-nhat);border-color:#f6d1ac;color:#7c4100}
.chip-vang{background:var(--vang-nhat);border-color:#f4dc9e;color:#6a4b00}
.chip-xanh{background:var(--xanh-nhat);border-color:var(--xanh-vien);color:#164d33}
.chip-0{opacity:.55}
.kq-nut{display:flex;flex-wrap:wrap;gap:8px}
.nl-td{font-size:18px;margin:22px 0 10px;padding-left:12px;border-left:5px solid var(--vien)}
.nl-1{border-color:var(--do)}.nl-2{border-color:var(--cam)}.nl-3{border-color:var(--vang)}
.loi{background:var(--trang);border:1px solid var(--vien);border-left:5px solid var(--vien);border-radius:14px;padding:14px 16px;margin-bottom:10px}
.loi-1{border-left-color:var(--do)}.loi-2{border-left-color:var(--cam)}.loi-3{border-left-color:var(--vang)}
.loi h4{margin-bottom:.35em}
.loi p{margin:.3em 0;font-size:17px}
.loi-do{color:var(--phu)}
.loi-bai a{font-weight:600}
.bang-diem{background:var(--trang);border:1px solid var(--vien);border-radius:var(--bo);padding:6px 16px}
.bd-dong{display:grid;grid-template-columns:1fr auto;grid-template-areas:"ten so" "thanh thanh";gap:4px 12px;padding:10px 0;border-bottom:1px solid #edf1f8}
.bd-dong:last-child{border-bottom:0}
@media(min-width:720px){.bd-dong{grid-template-columns:minmax(220px,1.2fr) 2fr 140px;grid-template-areas:"ten thanh so";align-items:center}}
.bd-ten{grid-area:ten;font-size:17px}
.bd-thanh{grid-area:thanh;height:10px;background:#edf1f8;border-radius:99px;overflow:hidden}
.bd-thanh i{display:block;height:100%;border-radius:99px}
.bd-thanh .du{background:var(--xanh)}.bd-thanh .nua{background:var(--vang)}.bd-thanh .khong{background:var(--do);min-width:6px}
.bd-so{grid-area:so;text-align:right;font-weight:700;white-space:nowrap}
.bd-na .bd-ten,.bd-na .bd-so{color:var(--phu);font-weight:500}
.bd-na .bd-so{font-size:15px}
.so{text-decoration:none;font-weight:700}
.so:hover{text-decoration:underline}
.so-do{color:var(--do)}.so-xanh{color:var(--xanh)}
.luoi-so{display:grid;grid-template-columns:1fr 1fr;gap:10px}
@media(min-width:720px){.luoi-so{grid-template-columns:repeat(3,1fr)}}
@media(min-width:1024px){.luoi-so{grid-template-columns:repeat(4,1fr)}}
.o-so{background:var(--trang);border:1px solid var(--vien);border-radius:14px;padding:12px 14px;display:flex;flex-direction:column;gap:2px}
.o-so span{font-size:14px;color:var(--phu);line-height:1.35}
.o-so .so{font-size:22px}
.o-so-lon .so{font-size:28px}
.the-doc{background:var(--trang);border:1px solid var(--vien);border-radius:var(--bo);padding:14px 18px;margin:16px 0 0}
.the-doc dt{font-weight:700;margin-top:10px;font-size:16px}
.the-doc dt small{font-weight:500;margin-left:6px}
.the-doc dd{margin:2px 0 0;color:var(--phu);word-break:break-word;font-size:17px}
.bang-bot{background:var(--trang);border:1px solid var(--vien);border-radius:var(--bo);padding:4px 16px}
.bb-dong{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid #edf1f8}
.bb-dong:last-child{border-bottom:0}
.bb-ten small{display:block;color:var(--phu);font-size:14px;line-height:1.4}
.bb-tt{flex:none;font-weight:700;font-size:15px;border-radius:999px;padding:5px 12px;text-align:center}
.bb-cho{background:var(--xanh-nhat);color:var(--xanh-dam)}.bb-chan{background:var(--do-nhat);color:#8b1d1d}
.pre-nho{max-height:220px;white-space:pre-wrap}

/* cách chấm */
.bang-cach{display:grid;gap:10px}
.bc-dong{background:var(--trang);border:1px solid var(--vien);border-radius:14px;padding:14px 16px}
.bc-dong:target{border-color:var(--xanh);box-shadow:0 0 0 3px var(--xanh-nhat)}
.bc-dau{display:flex;justify-content:space-between;gap:10px;align-items:baseline;margin-bottom:4px}
.bc-w{color:var(--xanh);font-weight:800;white-space:nowrap}
.bc-dong p{margin:0;color:var(--phu)}
.ds li,.ds-loi li{margin-bottom:.5em}
.ds-loi li:target{background:var(--vang-nhat);border-radius:8px}

/* bài */
.vet{font-size:15px;color:var(--phu);margin-bottom:10px}
.vet a{color:var(--phu)}
.bai-dau{padding-top:28px}
.bai-dau h1{font-size:clamp(30px,5.4vw,44px)}
.bai-tt{font-size:20px;color:var(--chu);font-weight:500;border-left:4px solid var(--xanh);padding-left:14px}
.bai-meta{font-size:15px;color:var(--phu)}
.bai-than{font-size:19px;line-height:1.75}
.bai-than h2{margin-top:1.6em;font-size:clamp(24px,3.6vw,29px)}
.bai-than h3{margin-top:1.3em}
.bai-than ul,.bai-than ol{padding-left:1.3em}
.bai-than li{margin-bottom:.45em}
.bai-than blockquote{margin:1.2em 0;padding:12px 18px;background:var(--xanh-nhat);border-radius:12px;border-left:4px solid var(--xanh)}
.bai-than table{width:100%;border-collapse:collapse;font-size:16px;margin:1em 0;display:block;overflow-x:auto}
.bai-than th,.bai-than td{border:1px solid var(--vien);padding:8px 10px;text-align:left;vertical-align:top}
.bai-than th{background:#eef2fa}
.bai-hoi,.bai-cc,.bai-lq{margin-top:28px}

/* chân trang */
.ft{background:#fff;border-top:1px solid var(--vien);margin-top:40px;padding:32px 0 16px}
.ft-in{max-width:1160px;margin:0 auto;padding:0 16px;display:grid;gap:24px;grid-template-columns:1fr}
@media(min-width:720px){.ft-in{grid-template-columns:1.4fr 1fr 1fr 1fr}}
.ft-c1 p{color:var(--phu);font-size:16px;margin-top:12px}
.ft-c b{display:block;margin-bottom:6px}
.ft-c a{display:block;color:var(--phu);text-decoration:none;font-size:16px;padding:3px 0}
.ft-c a:hover{color:var(--xanh)}
.ft-duoi{max-width:1160px;margin:16px auto 0;padding:12px 16px 0;border-top:1px solid var(--vien);font-size:14px;color:var(--phu)}

/* thanh dưới: điện thoại = đáy màn hình; ≥768px = dock nổi giữa đáy */
.bn{position:fixed;left:0;right:0;bottom:0;z-index:45;display:flex;justify-content:space-around;align-items:stretch;background:rgba(255,255,255,.97);border-top:1px solid var(--vien);padding:6px 4px calc(6px + env(safe-area-inset-bottom));backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.bn a,.bn button{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;min-height:52px;text-decoration:none;color:var(--phu);font:600 12.5px "Be Vietnam Pro",sans-serif;background:none;border:0;cursor:pointer;border-radius:12px;padding:2px}
.bn svg{width:25px;height:25px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.bn a.on{color:var(--xanh-dam)}
.bn a.on svg{stroke-width:2.3}
.bn-giua i{display:flex;align-items:center;justify-content:center;width:50px;height:50px;margin-top:-22px;border-radius:50%;background:var(--xanh);color:#fff;box-shadow:0 6px 16px rgba(11,114,133,.35);border:3px solid #fff}
.bn-giua svg{stroke:#fff;width:26px;height:26px}
.bn-giua span{color:var(--xanh-dam)}
@media(min-width:768px){
  .bn{left:50%;right:auto;bottom:16px;transform:translateX(-50%);width:max-content;max-width:calc(100vw - 24px);gap:4px;border:1px solid var(--vien);border-radius:22px;padding:6px 10px;box-shadow:0 10px 30px rgba(20,33,61,.14)}
  .bn a,.bn button{flex:none;flex-direction:row;gap:8px;padding:8px 14px;min-height:48px;font-size:15px}
  .bn a:hover,.bn button:hover{background:var(--xanh-nhat);color:var(--xanh-dam)}
  .bn svg{width:22px;height:22px}
  .bn a.bn-giua i{width:auto;height:auto;margin:0;background:none;box-shadow:none;border:0;color:inherit}
  .bn a.bn-giua{background:var(--xanh);color:#fff}
  .bn a.bn-giua svg{stroke:#fff;width:22px;height:22px}
  .bn a.bn-giua span{color:#fff}
  .bn a.bn-giua:hover,.bn a.bn-giua.on{background:var(--xanh-dam);color:#fff}
  body{padding-bottom:100px}
}

/* màn chờ chấm */
.cho{position:fixed;inset:0;z-index:80;background:rgba(246,248,252,.92);display:flex;align-items:center;justify-content:center;padding:16px}
.cho[hidden]{display:none}
.cho-hop{background:#fff;border:1px solid var(--vien);border-radius:20px;box-shadow:var(--bong);padding:28px 24px;max-width:420px;width:100%;text-align:center}
.cho-vong{width:56px;height:56px;margin:0 auto 14px;border-radius:50%;border:5px solid var(--xanh-nhat);border-top-color:var(--xanh);animation:xoay 1s linear infinite}
@keyframes xoay{to{transform:rotate(360deg)}}
.cho-td{font-size:20px;font-weight:700;margin-bottom:6px;word-break:break-word}
.cho-buoc{color:var(--xanh-dam);font-weight:600;min-height:1.6em}
.cho-phu{color:var(--phu);font-size:15px;margin:0}
@media(prefers-reduced-motion:reduce){.cho-vong{animation-duration:3s}}

/* ═════ Siêu SEO thêm (SIEUSEO_V1) ═════ */
.tb-sso{margin-left:auto;display:flex;align-items:center}
@media(min-width:1024px){.tb-sso{margin-left:8px}}
.nhan-hang{padding-top:14px}
.the-noi{border-color:var(--xanh-vien);box-shadow:0 0 0 3px var(--xanh-nhat)}
.gia-luoi{display:grid;gap:16px;grid-template-columns:1fr}
@media(min-width:720px){.gia-luoi{grid-template-columns:1fr 1fr}}
@media(min-width:1100px){.gia-luoi{grid-template-columns:repeat(4,1fr)}}
.gia-the{display:flex;flex-direction:column;background:var(--trang);border:1px solid var(--vien);border-radius:18px;padding:20px;box-shadow:var(--bong)}
.gia-the h3{margin-bottom:4px}
.gia-so{font-size:32px;font-weight:800;color:var(--chu);line-height:1.1;margin:6px 0 2px}
.gia-so small{font-size:16px;font-weight:600;color:var(--phu)}
.gia-nam{font-size:15px;color:var(--phu);margin:0 0 10px}
.gia-the ul{padding-left:1.1em;margin:0 0 16px;flex:1}
.gia-the li{margin-bottom:.35em;font-size:17px}
.gia-the form{display:flex;flex-direction:column;gap:8px}
.gia-hien{border:2px solid var(--xanh)}
.buoc{counter-reset:b;display:grid;gap:14px}
.buoc>li{list-style:none;background:var(--trang);border:1px solid var(--vien);border-radius:16px;padding:16px 16px 16px 64px;position:relative}
.buoc>li::before{counter-increment:b;content:counter(b);position:absolute;left:16px;top:16px;width:34px;height:34px;border-radius:50%;background:var(--xanh);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center}
.buoc h3{margin-bottom:.3em}
.gia-lap{display:block;background:#f1f4fa;border:1px dashed var(--xanh-vien);border-radius:12px;padding:10px 12px;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:15px;word-break:break-all;margin:8px 0}
.mo-phong{background:#fff;border:1px solid var(--vien);border-radius:14px;padding:12px;max-width:420px;margin:10px 0;font-size:15px;box-shadow:var(--bong)}
.mo-phong .mp-dau{display:flex;align-items:center;gap:8px;font-weight:700;border-bottom:1px solid var(--vien);padding-bottom:8px;margin-bottom:8px}
.mo-phong .mp-o{border:1px solid var(--vien);border-radius:8px;padding:8px;margin:6px 0;color:var(--phu)}
.mo-phong .mp-chon{display:flex;justify-content:space-between;border:2px solid var(--xanh);border-radius:8px;padding:8px;margin:6px 0;font-weight:600}
.mo-phong .mp-nut{display:inline-block;background:#1a73e8;color:#fff;border-radius:6px;padding:6px 14px;font-weight:700;margin-top:4px}
.site-ds{display:grid;gap:12px}
.site-the{display:grid;grid-template-columns:auto 1fr;gap:6px 16px;align-items:center;background:var(--trang);border:1px solid var(--vien);border-radius:16px;padding:14px 16px;box-shadow:var(--bong)}
.site-the h3{margin:0;font-size:20px;word-break:break-all}
.site-the h3 a{color:var(--chu);text-decoration:none}
.site-the p{margin:0;color:var(--phu);font-size:15px}
.diem-tron{display:flex;align-items:center;justify-content:center;width:64px;height:64px;border-radius:50%;font-size:22px;font-weight:800;text-decoration:none;border:4px solid var(--vien);color:var(--chu)}
.diem-tron.tot{border-color:var(--la);color:#095c3a}.diem-tron.kha{border-color:#5aa832}.diem-tron.can{border-color:var(--cam);color:#8a4700}.diem-tron.yeu{border-color:var(--do);color:#8b1d1d}
.the-dong{display:flex;flex-wrap:wrap;gap:8px;margin-top:6px}
.bd{background:var(--trang);border:1px solid var(--vien);border-radius:16px;padding:12px 12px 6px;margin:12px 0}
.bd svg{width:100%;height:auto;display:block;max-height:320px;margin:0 auto}
.bd .truc{stroke:#d5ddeb;stroke-width:1;vector-effect:non-scaling-stroke}
.bd .duong{fill:none;stroke:var(--xanh);stroke-width:2;vector-effect:non-scaling-stroke;stroke-linejoin:round;stroke-linecap:round}
.bd .vung{fill:var(--xanh-nhat);opacity:.7}
.bd .diem{fill:var(--xanh);stroke:#fff;stroke-width:2}
.bd a:hover .diem,.bd a:focus .diem{r:7}
.bd text{font:500 26px "Be Vietnam Pro",sans-serif;fill:var(--phu)}
@media(min-width:720px){.bd text{font-size:16px}}
@media(min-width:1100px){.bd text{font-size:12px}}
.bd .diem{stroke-width:1.5}
.bd-chu{font-size:14px;color:var(--phu);margin:4px 4px 6px}
.bang-wrap{overflow-x:auto;background:var(--trang);border:1px solid var(--vien);border-radius:14px}
.bang{width:100%;border-collapse:collapse;font-size:16px}
.bang th,.bang td{padding:10px 12px;border-bottom:1px solid #edf1f8;text-align:left;vertical-align:top}
.bang th{background:#f3f6fc;font-size:14px;color:var(--phu);white-space:nowrap}
.bang th a{color:inherit}
.bang td.so-c,.bang th.so-c{text-align:right;white-space:nowrap}
.bang tr:last-child td{border-bottom:0}
.bang .ten{word-break:break-word;max-width:520px;min-width:150px}
.loc-hang{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:12px 0}
.loc-hang a{border:1px solid var(--vien);background:var(--trang);border-radius:999px;padding:6px 14px;text-decoration:none;color:var(--chu);font-size:15px;min-height:40px;display:inline-flex;align-items:center}
.loc-hang a.on{background:var(--xanh);border-color:var(--xanh);color:#fff}
.loc-hang form{display:flex;gap:6px;flex:1;min-width:220px}
.loc-hang input{flex:1;min-width:0;border:1px solid var(--vien);border-radius:10px;padding:8px 10px;font:500 16px "Be Vietnam Pro",sans-serif}
.phan-trang{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0}
.o-form label{display:block;font-weight:700;margin:12px 0 6px}
.o-form input[type=text],.o-form textarea{width:100%;border:2px solid var(--vien);border-radius:12px;padding:10px 12px;font:500 17px "Be Vietnam Pro",sans-serif;background:#fff;color:var(--chu)}
.o-form textarea{min-height:170px;line-height:1.5}
.o-form input:focus,.o-form textarea:focus{outline:0;border-color:var(--xanh)}
.o-form .goi-y{font-size:15px;color:var(--phu);margin:4px 0}
.ai-cau{background:var(--trang);border:1px solid var(--vien);border-left:5px solid var(--vien);border-radius:14px;padding:14px 16px;margin-bottom:10px}
.ai-cau.co{border-left-color:var(--la)}.ai-cau.khong{border-left-color:var(--cam)}
.ai-cau h3{font-size:18px;margin-bottom:6px}
.ai-cau blockquote{margin:8px 0;padding:8px 12px;background:var(--la-nhat);border-radius:10px;font-size:16px}
.ai-cau details summary{cursor:pointer;color:var(--xanh);font-weight:600;font-size:15px}
.ai-cau .tl{white-space:pre-wrap;font-size:16px;color:var(--phu);margin-top:8px}
.tien-do{height:12px;background:#e6ebf5;border-radius:99px;overflow:hidden;margin:10px 0}
.tien-do i{display:block;height:100%;background:var(--xanh);width:0;transition:width .4s}
.bien-lai{background:var(--trang);border:1px solid var(--vien);border-radius:16px;padding:6px 16px;max-width:520px}
.bien-lai div{display:flex;justify-content:space-between;gap:12px;padding:10px 0;border-bottom:1px solid #edf1f8}
.bien-lai div:last-child{border-bottom:0;font-weight:800}
.nhan-tt{display:inline-block;border-radius:999px;padding:2px 10px;font-size:14px;font-weight:700}
.nhan-tt.tt-ok{background:var(--la-nhat);color:#095c3a}.nhan-tt.tt-vang{background:var(--vang-nhat);color:#6a4b00}.nhan-tt.tt-loi{background:var(--do-nhat);color:#8b1d1d}.nhan-tt.tt-xam{background:#eef2fa;color:var(--phu)}
.khoi{background:var(--trang);border:1px solid var(--vien);border-radius:18px;padding:18px;margin:16px 0;box-shadow:var(--bong)}
.khoi>h2{font-size:24px}
.khoi-dau{display:flex;justify-content:space-between;gap:10px;align-items:baseline;flex-wrap:wrap}
.nut-hang{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}
.nut-do{background:#fff;color:var(--do);border-color:#f3c2c2}
@media(max-width:719px){
  .bang-the thead{display:none}
  .bang-the tr{display:grid;grid-template-columns:repeat(4,1fr);gap:2px 8px;padding:10px 12px;border-bottom:1px solid #edf1f8}
  .bang-the tr:last-child{border-bottom:0}
  .bang-the td{border:0;padding:0}
  .bang-the td.ten{grid-column:1/-1;max-width:none;min-width:0;padding-bottom:4px;word-break:break-all}
  .bang-the td.so-c{text-align:left;font-size:15px}
  .bang-the td[data-nhan]::before{content:attr(data-nhan);display:block;font-size:12px;color:var(--phu)}
}

/* DRAWER_EMOJI_v1 (10/11/2026) — menu bên kiểu quen của hệ (aicovan/aidinh): thẻ điểm nhấn · lưới ô emoji · danh sách có emoji + số · mục đang mở tô sáng.
   Lối vào DUY NHẤT là nút "Menu" ở thanh dưới (.bn — mọi khổ; ≥768px là dock nổi). Topbar không còn nút ☰ (BO_HAMBURGER_v1). */
.dr-nen{position:fixed;inset:0;background:rgba(16,24,40,.38);z-index:60}
.dr{position:fixed;top:0;right:0;bottom:0;width:min(380px,92vw);background:#fff;z-index:61;overflow-y:auto;overscroll-behavior:contain;padding:14px 14px calc(40px + env(safe-area-inset-bottom));box-shadow:-10px 0 30px rgba(0,0,0,.14)}
.dr-dau{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.dr-x{border:1px solid var(--vien);background:#fff;border-radius:12px;min-height:44px;padding:6px 14px;font:600 15px "Be Vietnam Pro",sans-serif;cursor:pointer;color:var(--chu)}
.dr-x:hover{border-color:var(--xanh);color:var(--xanh-dam)}
.dr-nhan{display:block;margin:0 0 12px;padding:14px;border-radius:16px;background:linear-gradient(135deg,var(--xanh) 0%,var(--xanh-dam) 100%);color:#fff;text-decoration:none;box-shadow:0 8px 22px rgba(16,24,40,.16)}
a.dr-nhan:hover{color:#fff;filter:brightness(1.06)}
.dr-nhan.dang{box-shadow:0 0 0 3px var(--xanh-vien),0 8px 22px rgba(16,24,40,.16)}
.dr-nhan-dau,.dr-nhan label{display:flex;align-items:center;gap:12px;margin:0;cursor:pointer}
.dr-nhan-bt{flex:none;font-size:30px;line-height:1}
.dr-nhan-dau>span:not(.dr-nhan-bt),.dr-nhan label>span:not(.dr-nhan-bt){flex:1;min-width:0}
.dr-nhan b{display:block;font-size:18px;font-weight:800;line-height:1.25;color:#fff}
.dr-nhan em{display:block;font-style:normal;font-size:14px;line-height:1.35;opacity:.92;color:#fff;word-break:break-word}
.dr-nhan i{flex:none;font-style:normal;font-size:26px;line-height:1;opacity:.85}
.dr-nhan .o-nhap{margin-top:12px;border-color:transparent;box-shadow:none;padding:5px}
.dr-nhan .o-nhap input{font-size:17px}
.dr-nhan .nut{min-height:44px;padding:6px 16px}
.dr-nhan-tk{background:linear-gradient(135deg,var(--chu) 0%,#2a3550 100%)}
.dr-phu{margin:-4px 4px 12px;font-size:15px;color:var(--phu)}
.dr-o{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.dr-o-o{display:flex;flex-direction:column;justify-content:space-between;gap:8px;min-height:82px;padding:11px 12px;border-radius:14px;background:var(--t);border:1px solid rgba(0,0,0,.04);color:var(--chu);text-decoration:none;font-weight:700;font-size:16px;line-height:1.25}
.dr-o-o:hover{color:var(--chu);box-shadow:inset 0 0 0 2px var(--c)}
.dr-o-o.dang{box-shadow:inset 0 0 0 2px var(--c),0 2px 8px rgba(16,24,40,.08);background:#fff;color:var(--c)}
.dr-o-o:last-child:nth-child(odd){grid-column:1/-1;min-height:0;flex-direction:row;justify-content:flex-start;align-items:center;gap:12px}
.dr-o-bt{font-size:25px;line-height:1}
.o-xanh{--t:#e8f0fd;--c:#1f5fd1}.o-tim{--t:#f1ecfd;--c:#6d3fd1}.o-vang{--t:#fff4d6;--c:#b07800}
.o-la{--t:#e7f6ed;--c:#0e7a4e}.o-cam{--t:#ffeedd;--c:#d06a10}.o-hong{--t:#fde8ef;--c:#c93d70}
.dr-nhom{display:flex;align-items:baseline;justify-content:space-between;gap:8px;margin:20px 4px 6px;font-size:13px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:var(--phu)}
.dr-nhom a{font-size:14px;letter-spacing:0;text-transform:none;font-weight:700;text-decoration:none;white-space:nowrap}
.dr-ds{display:flex;flex-direction:column}
.dr-ds a,.dr-ds button{display:flex;align-items:center;gap:12px;width:100%;min-height:46px;padding:9px 8px;border:0;border-radius:12px;background:none;color:var(--chu);font:600 17px "Be Vietnam Pro",sans-serif;text-align:left;text-decoration:none;cursor:pointer}
.dr-ds a:hover,.dr-ds button:hover{background:var(--xanh-nhat);color:var(--chu)}
.dr-ds a.dang{background:var(--xanh-nhat);color:var(--xanh-dam);box-shadow:inset 4px 0 0 var(--xanh)}
.dr-ds form{margin:0}
.dr-bt{flex:none;width:28px;font-size:20px;line-height:1;text-align:center}
.dr-ten{flex:1;min-width:0;line-height:1.3}
.dr-ten small{display:block;font-size:13px;font-weight:500;color:var(--phu)}
.dr-dem{flex:none;font-size:13px;font-weight:700;color:var(--xanh-dam);background:var(--xanh-nhat);border-radius:999px;padding:1px 10px}
.dr-ds a.dang .dr-dem{background:#fff}

/* VIDEO_GT_v1 — chỗ chừa nút video giới thiệu ở hero (partials/video-gt.php; chưa có noi-dung/video-gioi-thieu.json thì không in gì) */
.vgt-nut{position:relative;display:inline-flex;align-items:center;gap:12px;margin:4px 0 12px;padding:6px 18px 6px 6px;border:1px solid var(--xanh-vien);border-radius:999px;background:var(--trang);color:var(--chu);font:inherit;text-align:left;cursor:pointer;box-shadow:var(--bong)}
.vgt-nut:hover{border-color:var(--xanh)}
.vgt-bia{position:relative;flex:none;width:52px;height:52px;border-radius:50%;overflow:hidden;background:var(--xanh-nhat)}
.vgt-bia img{display:block;width:100%;height:100%;object-fit:cover}
.vgt-bia i{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,.28)}
.vgt-bia i::after{content:"";margin-left:4px;border-style:solid;border-width:9px 0 9px 15px;border-color:transparent transparent transparent #fff}
.vgt-chu b{display:block;font-size:16px;font-weight:700;line-height:1.25}
.vgt-chu small{display:block;font-size:14px;color:var(--phu)}
.vgt-nen{position:fixed;inset:0;z-index:90;display:flex;align-items:center;justify-content:center;padding:16px;background:rgba(16,24,40,.7)}
.vgt-nen[hidden]{display:none}
.vgt-khung{position:relative;width:min(960px,100%);background:#000;border-radius:16px;overflow:hidden}
.vgt-khung video{display:block;width:100%;max-height:80vh;background:#000}
.vgt-dong{position:absolute;top:8px;right:8px;z-index:2;min-height:40px;padding:4px 12px;border:0;border-radius:10px;background:rgba(255,255,255,.92);color:#111;font:600 15px "Be Vietnam Pro",sans-serif;cursor:pointer}

/* ═════ RankPier thêm (RANKPIER_V1) ═════ */
.tb-lang{display:inline-flex;align-items:center;justify-content:center;min-width:44px;min-height:40px;border:1px solid var(--vien);border-radius:10px;font-weight:700;font-size:14px;text-decoration:none;color:var(--chu);margin-left:auto}
.tb-lang:hover{border-color:var(--xanh);color:var(--xanh-dam)}
@media(min-width:1024px){.tb-lang{margin-left:8px}}
.tb-lang + .tb-sso{margin-left:8px}
/* drawer kiểu aicovan DRAWER_V2 */
.dr-tk{display:flex;align-items:center;gap:12px;background:var(--xanh-dam);color:#fff!important;border-radius:14px;padding:13px 14px;margin:4px 0 12px;text-decoration:none!important}
.dr-tk-bt{font-size:24px;line-height:1;flex:none}
.dr-tk span:not(.dr-tk-bt){display:flex;flex-direction:column;flex:1;line-height:1.3;min-width:0}
.dr-tk b{font-size:16px}.dr-tk em{font-style:normal;font-size:13px;opacity:.88;overflow:hidden;text-overflow:ellipsis}
.dr-tk i{font-style:normal;font-size:22px;opacity:.8}
.o-xanh{--t:#e3f4f7;--c:#0b7285}.o-bien{--t:#dff0fb;--c:#1769aa}
.dr-tk + .dr-o{margin-top:0}
/* hero */
.hero-rp{background:linear-gradient(180deg,#ffffff 0%,#eef8fa 100%)}
.hero-luoi{display:grid;gap:24px;align-items:center}
@media(min-width:960px){.hero-luoi{grid-template-columns:1.25fr 1fr}}
.hero-nut{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0 6px}
.nut-video{background:#fff;color:var(--chu);border-color:var(--vien)}
.nut-video[aria-disabled=true]{opacity:.75;cursor:default}
.nut-video .tron{display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;border-radius:50%;background:var(--xanh);color:#fff;font-size:12px}
.hero-the{background:#fff;border:1px solid var(--vien);border-radius:20px;padding:18px;box-shadow:var(--bong)}
.hero-the h2{font-size:19px;margin-bottom:10px}
.cam-ket{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.cam-ket li{display:flex;gap:10px;align-items:flex-start;font-size:17px}
.cam-ket li span{flex:none;font-size:20px;line-height:1.4}
/* thẻ site */
.site-luoi{display:grid;gap:14px;grid-template-columns:1fr}
@media(min-width:720px){.site-luoi{grid-template-columns:1fr 1fr}}
@media(min-width:1100px){.site-luoi{grid-template-columns:1fr 1fr 1fr}}
.st{display:flex;flex-direction:column;gap:10px;background:#fff;border:1px solid var(--vien);border-radius:18px;padding:16px;box-shadow:var(--bong)}
.st-dau{display:flex;gap:10px;align-items:flex-start}
.st-bt{flex:none;width:44px;height:44px;border-radius:12px;background:var(--xanh-nhat);display:flex;align-items:center;justify-content:center;font-size:22px}
.st h3{font-size:18px;margin:0;word-break:break-word}
.st h3 a{color:var(--chu);text-decoration:none}
.st-dm{font-size:14px;color:var(--phu);margin:2px 0 0}
.st-so{display:grid;grid-template-columns:repeat(3,1fr);gap:6px}
.st-so div{background:var(--nen);border-radius:10px;padding:8px 10px;display:flex;flex-direction:column}
.st-so span{font-size:12.5px;color:var(--phu);line-height:1.3}
.st-so .so{font-size:18px}
.st-chan{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;margin-top:auto}
.st-gia{font-size:20px;font-weight:800}
.st-gia small{display:block;font-size:12.5px;font-weight:600;color:var(--phu)}
.dot-bd{display:block;width:100%;height:46px}
.dot-bd polyline{fill:none;stroke:var(--xanh);stroke-width:2;vector-effect:non-scaling-stroke}
.dot-bd polygon{fill:var(--xanh-nhat)}
.nhan-luat{display:inline-block;font-size:13px;font-weight:700;border-radius:999px;padding:2px 10px;background:var(--vang-nhat);color:#6a4b00}
.het-cho{color:var(--do);font-weight:700;font-size:14px}
.con-cho{color:var(--la);font-weight:700;font-size:14px}
/* bài */
.bai-bia{margin:18px 0 6px;border-radius:18px;overflow:hidden;background:#e6eef0;aspect-ratio:3/2}
.bai-bia img{display:block;width:100%;height:100%;object-fit:cover}
.bai-anh{margin:1.4em 0;border-radius:16px;overflow:hidden;background:#e6eef0}
.bai-anh img{display:block;width:100%;height:auto}
.the-bai-anh{padding:0;overflow:hidden}
.the-bai-anh img{display:block;width:100%;aspect-ratio:3/2;object-fit:cover;background:#e6eef0}
.the-bai-anh .tba-than{padding:14px 16px 16px}
.bai-cta{background:linear-gradient(135deg,#e6f6f9,#fffaf0);border:1px solid var(--xanh-vien);border-radius:18px;padding:18px;margin:28px 0}
/* form đặt bài */
.o-form select,.o-form input[type=url],.o-form input[type=email]{width:100%;border:2px solid var(--vien);border-radius:12px;padding:10px 12px;font:500 17px "Be Vietnam Pro",sans-serif;background:#fff;color:var(--chu)}
.o-form textarea.bai{min-height:420px;font-size:16px}
.lk-dong{display:grid;gap:8px;grid-template-columns:1fr;background:var(--nen);border:1px solid var(--vien);border-radius:12px;padding:10px;margin-bottom:8px}
@media(min-width:720px){.lk-dong{grid-template-columns:1.4fr 1fr}}
.chon-kieu{display:grid;gap:10px;grid-template-columns:1fr}
@media(min-width:720px){.chon-kieu{grid-template-columns:1fr 1fr}}
.chon-kieu label{display:flex;gap:10px;align-items:flex-start;background:#fff;border:2px solid var(--vien);border-radius:14px;padding:14px;cursor:pointer;margin:0;font-weight:500}
.chon-kieu label:has(input:checked){border-color:var(--xanh);background:var(--xanh-nhat)}
.chon-kieu input{margin-top:6px}
.dem-chu{font-size:15px;color:var(--phu);margin:6px 0}
.dong-y{display:flex;gap:10px;align-items:flex-start;font-weight:500!important}
.html-copy{max-height:360px;overflow:auto;white-space:pre-wrap;font-size:14px}
.xem-bai{background:#fff;border:1px solid var(--vien);border-radius:14px;padding:16px;max-height:600px;overflow:auto}
.dong-thoi{list-style:none;padding:0;margin:0;border-left:3px solid var(--vien)}
.dong-thoi li{padding:6px 0 10px 14px;position:relative;font-size:16px}
.dong-thoi li::before{content:"";position:absolute;left:-7px;top:13px;width:11px;height:11px;border-radius:50%;background:var(--xanh)}
.dong-thoi small{color:var(--phu)}
.hero-the .luoi-so{grid-template-columns:1fr 1fr}