/* 18/10/2026: bảng màu theo logo lửa-lá. Nút = đỏ gạch (chữ trắng 6.7:1), link = cam cháy đậm (5.2:1 — #E8620C chỉ 3.4:1 nên chỉ dùng cho viền/điểm nhấn), nền kem. */
:root{--bg:#fffdf8;--ink:#1f1a17;--ink2:#4f4741;--mute:#756b64;--line:#ece4d8;--brand:#a8321e;--brand2:#8a2816;--link:#c2410c;--accent:#e8620c;--fire:#c62828;--leaf:#2e7d32;--soft:#fdf1e8;--ok:#2e7d32;--warn:#b45309;--card:#fff;--max:1120px;--r:14px}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font:16px/1.6 Inter,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}
a{color:var(--link);text-decoration:none}a:hover{text-decoration:underline}
img,svg{max-width:100%}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
header.top{position:sticky;top:0;z-index:20;background:rgba(255,253,248,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
header.top .wrap{display:flex;align-items:center;gap:18px;height:62px}
.logo{display:flex;align-items:center;gap:9px;font-weight:800;font-size:20px;letter-spacing:-.02em;color:var(--ink)}
.logo:hover{text-decoration:none}.logo img{display:block;height:34px;width:auto}.logo i{width:28px;height:28px;border-radius:8px;background:var(--brand);display:inline-grid;place-items:center;color:#fff;font-style:normal;font-size:15px;font-weight:800}
nav.main{display:flex;gap:4px;margin-left:8px}
nav.main a{padding:7px 11px;border-radius:8px;color:var(--ink2);font-weight:500;font-size:15px}
nav.main a:hover,nav.main a.on{background:var(--soft);color:var(--brand);text-decoration:none}
.spacer{flex:1}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 18px;border-radius:10px;font-weight:600;font-size:15px;border:1px solid transparent;cursor:pointer;line-height:1.2;white-space:nowrap}
.btn:hover{text-decoration:none}
.btn.p{background:var(--brand);color:#fff}.btn.p:hover{background:var(--brand2)}
.btn.s{background:#fff;color:var(--ink);border-color:var(--line)}.btn.s:hover{border-color:#d6cbbd}
.btn.sm{padding:8px 13px;font-size:14px}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:8px;padding:7px 9px}
.hero{padding:76px 0 40px}
.hero h1{font-size:clamp(30px,4.4vw,46px);line-height:1.08;letter-spacing:-.03em;margin:0 0 18px;max-width:820px}
.hero p.lead{font-size:18px;color:var(--ink2);max-width:680px;margin:0 0 28px}
.kicker{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--link);margin-bottom:14px}
.cta{display:flex;gap:12px;flex-wrap:wrap}
.note{font-size:14px;color:var(--mute);margin-top:12px}
.proof{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:44px 0 0}
.proof div{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px 18px}
.proof b{display:block;font-size:28px;letter-spacing:-.02em;line-height:1.1}
.proof span{font-size:14px;color:var(--ink2)}
section{padding:64px 0}
section.alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
h2{font-size:clamp(26px,3.4vw,36px);letter-spacing:-.025em;line-height:1.15;margin:0 0 12px}
h3{font-size:19px;margin:0 0 8px;letter-spacing:-.01em}
p.sub{font-size:17px;color:var(--ink2);max-width:700px;margin:0 0 30px}
.grid{display:grid;gap:18px}
.g3{grid-template-columns:repeat(3,1fr)}.g2{grid-template-columns:repeat(2,1fr)}.g4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:24px}
.card .tag{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--brand);background:var(--soft);padding:3px 8px;border-radius:6px;margin-bottom:12px}
.card p{margin:0;color:var(--ink2);font-size:15px}
.card ul{margin:10px 0 0;padding-left:18px;color:var(--ink2);font-size:15px}
.card li{margin:4px 0}
.card .more{display:inline-block;margin-top:14px;font-weight:600}
.steps{counter-reset:s}
.steps .card{position:relative;padding-top:56px}
.steps .card:before{counter-increment:s;content:counter(s);position:absolute;top:20px;left:24px;width:28px;height:28px;border-radius:50%;background:var(--brand);color:#fff;font-weight:700;font-size:14px;display:grid;place-items:center}
table.cmp{width:100%;border-collapse:collapse;font-size:15px;background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
table.cmp th,table.cmp td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
table.cmp th{background:#faf4ec;font-size:13px;letter-spacing:.04em;text-transform:uppercase;color:var(--ink2)}
table.cmp td:first-child{font-weight:600}
table.cmp tr:last-child td{border-bottom:0}
.yes{color:var(--ok);font-weight:700}.no{color:#b42318;font-weight:700}.part{color:var(--warn);font-weight:700}
.scroll{overflow-x:auto}
.exams{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px}
.exams div{background:#fff;border:1px solid var(--line);border-radius:10px;padding:12px 14px;font-size:14px}
.exams b{display:block;font-size:15px}
.exams span{color:var(--mute)}
.price{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.price .card{display:flex;flex-direction:column}
.price .amt{font-size:38px;font-weight:800;letter-spacing:-.03em;margin:6px 0 2px}
.price .amt small{font-size:15px;font-weight:500;color:var(--mute)}
.price .card.hi{border-color:var(--accent);box-shadow:0 0 0 3px var(--soft)}
.price .btn{margin-top:auto}
.split{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
form.wl{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px;display:grid;gap:12px}
form.wl label{font-size:13px;font-weight:600;color:var(--ink2);display:block;margin-bottom:4px}
form.wl input,form.wl select,form.wl textarea{width:100%;padding:10px 12px;border:1px solid #ddd3c6;border-radius:9px;font:inherit;font-size:15px;background:#fff}
form.wl textarea{min-height:70px;resize:vertical}
form.wl .row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
form.wl .msg{font-size:14px;min-height:20px}
form.wl .msg.ok{color:var(--ok)}form.wl .msg.err{color:#b42318}
.hp{position:absolute;left:-9999px;opacity:0;height:0;width:0}
footer{padding:44px 0 60px;border-top:1px solid var(--line);color:var(--mute);font-size:14px}
footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:24px;margin-bottom:28px}
footer h4{margin:0 0 10px;color:var(--ink);font-size:14px}
footer a{color:var(--ink2);display:block;margin:4px 0}
.faq details{background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px 18px;margin-bottom:10px}
.faq summary{font-weight:600;cursor:pointer}
.faq p{margin:10px 0 0;color:var(--ink2);font-size:15px}
.page-h{padding:64px 0 30px}
.page-h h1{font-size:clamp(28px,3.8vw,40px);letter-spacing:-.03em;line-height:1.1;margin:0 0 14px;max-width:820px}
.page-h p{font-size:17px;color:var(--ink2);max-width:700px;margin:0}
.badge{display:inline-block;font-size:12px;font-weight:700;padding:3px 8px;border-radius:6px;background:#fff4e5;color:var(--warn);margin-left:8px;vertical-align:middle}
.quote{border-left:3px solid var(--accent);padding:6px 18px;color:var(--ink2);font-size:17px;max-width:760px}
@media(max-width:900px){.g3,.g4,.price,.split,footer .cols{grid-template-columns:1fr 1fr}.proof{grid-template-columns:1fr 1fr}}
@media(max-width:640px){header.top .wrap{gap:10px}header.top .btn.s{display:none}header.top .btn.p.sm{padding:8px 11px;font-size:13px}nav.main{display:none}.menu-btn{display:block}nav.main.open{display:flex;position:absolute;top:62px;left:0;right:0;background:#fff;flex-direction:column;padding:10px 16px 16px;border-bottom:1px solid var(--line)}.g3,.g4,.g2,.price,.split,footer .cols,form.wl .row{grid-template-columns:1fr}.hero{padding:48px 0 30px}section{padding:44px 0}.proof{grid-template-columns:1fr 1fr}}

.legal>*{max-width:780px}.legal h3{margin:30px 0 8px}.legal p{color:var(--ink2);font-size:16px;margin:0 0 12px}.legal p b{color:var(--ink)}
.legal-tbl{overflow-x:auto;border:1px solid var(--line);border-radius:12px;background:#fff;margin:6px 0 18px}.legal-tbl table{border-collapse:collapse;width:100%;font-size:14.5px;min-width:560px}
.legal-tbl th,.legal-tbl td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top;color:var(--ink2)}.legal-tbl th{font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--mute);background:#fbf6ef}.legal-tbl tr:last-child td{border-bottom:0}.legal-tbl td b{color:var(--ink)}
.page-h p.legal-ver{font-size:13.5px;color:var(--mute);margin-top:10px;font-family:ui-monospace,Menlo,monospace}
.legal h2{font-size:24px;margin:34px 0 8px}.legal h4{margin:18px 0 6px}.legal ul,.legal ol{max-width:780px;color:var(--ink2);font-size:16px;padding-left:22px}.legal li{margin:5px 0}
.legal blockquote{max-width:780px;margin:12px 0;padding:10px 14px;border-left:3px solid var(--accent);background:var(--soft);border-radius:0 10px 10px 0;color:var(--ink)}
.legal-sign{display:grid;grid-template-columns:1fr 1fr;gap:6px 30px;max-width:780px;margin:22px 0}.legal-sign p{margin:0}
/* 18/9/2026 trang chủ = sàn */
.home-hero{padding-bottom:28px}
.home-search{display:flex;gap:10px;flex-wrap:wrap;max-width:560px;margin:0 0 14px}
.home-search select{flex:1;min-width:200px;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font:inherit;font-size:16px;background:#fff;color:var(--ink)}
.home-chips{display:flex;gap:8px;flex-wrap:wrap}
.home-chips a{padding:7px 13px;border:1px solid var(--line);border-radius:99px;background:#fff;color:var(--ink);font-size:14px;font-weight:600}
.home-chips a:hover{border-color:var(--accent);text-decoration:none}
.home-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px;flex-wrap:wrap}
.home-head .more{font-weight:600}
.home-tutors{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}
.home-tutors a.ht{display:flex;gap:12px;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:16px;color:var(--ink)}
.home-tutors a.ht:hover{border-color:var(--accent);text-decoration:none}
.home-tutors .av{width:52px;height:52px;border-radius:50%;background:var(--soft);color:var(--brand);font-weight:800;display:flex;align-items:center;justify-content:center;flex:none;overflow:hidden}
.home-tutors .av img{width:100%;height:100%;object-fit:cover}
.home-tutors b{display:block}
.home-tutors .m{font-size:13px;color:var(--mute)}
.home-tutors .g{font-size:14px;font-weight:700;margin-top:4px}
.price.two{grid-template-columns:repeat(2,1fr);max-width:820px}
@media (max-width:760px){.price.two{grid-template-columns:1fr}}

/* 18/9/2026 nút đổi ngôn ngữ trong header (i18n.js gắn .on) */
.lang-sw{display:inline-flex;align-items:center;gap:2px;font-size:12.5px;font-weight:700;letter-spacing:.02em;color:var(--ink2);white-space:nowrap}
.lang-sw a{padding:5px 5px;border-radius:6px;color:var(--ink2);text-decoration:none}
.lang-sw a.on{color:var(--ink);background:rgba(31,26,23,.07)}
.lang-sw i{font-style:normal;opacity:.35}
@media(max-width:640px){.lang-sw{font-size:12px}.lang-sw a{padding:4px 4px}}
@media(max-width:400px){header.top .wrap{gap:7px}header.top .logo{font-size:18px;gap:7px}header.top .logo img{height:28px}header.top .btn.p.sm{padding:8px 9px;white-space:nowrap}.lang-sw a{padding:4px 3px}.menu-btn{flex:none}}

.price.four{grid-template-columns:repeat(4,1fr);gap:14px}
.price.four .amt{font-size:27px}
.price.four .card{padding:18px}
@media(max-width:1080px){.price.four{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.price.four{grid-template-columns:1fr}}

/* 21/9/2026 trang chủ hai cửa + thẻ yêu cầu học viên */
.two-door{margin-top:22px;max-width:680px}
.td-tabs{display:inline-flex;background:#f5ede3;border-radius:99px;padding:4px;gap:4px;margin-bottom:14px}
.td-tabs button{border:0;background:transparent;border-radius:99px;padding:8px 16px;font:inherit;font-weight:600;font-size:14px;color:var(--ink2);cursor:pointer}
.td-tabs button.on{background:#fff;color:var(--ink);box-shadow:0 1px 3px #0000001a}
.yc-ds{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px}
.yc-the{border:1px solid var(--line);border-radius:12px;padding:14px;background:#fff}
.yc-the h4{margin:0 0 4px;font-size:16px}
.yc-the .m{color:var(--ink2);font-size:14px;line-height:1.6}
.yc-chip{display:inline-block;background:var(--soft);color:var(--brand);border-radius:99px;padding:2px 9px;font-size:12px;font-weight:600;margin-right:6px;margin-bottom:6px}
@media(max-width:640px){.td-tabs{display:flex;width:100%}.td-tabs button{flex:1;padding:8px 10px;font-size:13px}}

/* (21/9/2026) Nhãn tiếng Việt dài hơn: thu thanh menu vào nút ☰ từ 980px, đừng đợi 640px —
   ở khoảng 700–900px chữ menu rớt dòng và chồng lên logo. */
@media(max-width:980px){
  nav.main{display:none}
  .menu-btn{display:block}
  nav.main.open{display:flex;position:absolute;top:62px;left:0;right:0;background:#fff;flex-direction:column;
                padding:10px 16px 16px;border-bottom:1px solid var(--line);z-index:30}
  header.top .wrap{gap:10px}
}
@media(max-width:860px){ header.top .btn.s{display:none} }
/* 21/9/2026 Header khi đã đăng nhập: TÊN + lối thoát (assets/app.js, #tlAuth). */
.hd-auth{display:inline-flex;align-items:center;gap:8px}
.hd-out{background:none;border:0;color:var(--mute);font:inherit;font-size:13px;cursor:pointer;padding:6px 2px;white-space:nowrap}
.hd-out:hover{color:var(--ink);text-decoration:underline}
nav.main a[data-admin]{color:var(--brand);font-weight:700}
@media(max-width:640px){.hd-out{display:none}}
/* 17/10/2026 dạy kèm 1-1 quốc tế: thẻ giáo viên, kết quả, dấu tick */
.ticks{list-style:none;padding:0;margin:16px 0 0;color:var(--ink2);font-size:15px}
.ticks li{padding-left:26px;position:relative;margin:8px 0}
.ticks li:before{content:"";position:absolute;left:4px;top:6px;width:10px;height:6px;border-left:2px solid var(--leaf);border-bottom:2px solid var(--leaf);transform:rotate(-45deg)}
.tutor{display:grid;grid-template-columns:72px 1fr;gap:16px;align-items:start}
.tutor img{width:72px;height:72px;border-radius:50%;object-fit:cover;background:var(--soft)}
.tutor h3{margin:0 0 2px;font-size:17px}
.tutor .cred{font-size:13.5px;font-weight:600;color:var(--link);margin:0 0 8px}
.tutor ul{margin:6px 0 0;padding-left:18px;color:var(--ink2);font-size:14.5px}
.tutor .subj{font-size:13px;color:var(--ink2);margin-top:10px}
.res figure{margin:0;background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;display:flex;flex-direction:column}
.res img{width:100%;height:auto;aspect-ratio:4/3;object-fit:contain;background:#fff;display:block;border-bottom:1px solid var(--line)}
.res figcaption{padding:14px 16px;font-size:14.5px;color:var(--ink2)}
.res figcaption b{display:block;color:var(--ink);font-size:16px;margin-bottom:4px}
.res blockquote{margin:8px 0 0;font-style:italic}
.score{font-size:28px;font-weight:800;letter-spacing:-.02em;color:var(--ink)}
.kv{width:100%;border-collapse:collapse;font-size:15px;margin-top:8px}
.kv th,.kv td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
.kv th{font-size:13px;text-transform:uppercase;letter-spacing:.04em;color:var(--ink2)}
.tblwrap{overflow-x:auto}
/* 18/10/2026 Academic team: thẻ giáo viên trượt ngang (trang chủ) */
.ac-nav{display:flex;gap:8px}
.ac-btn{width:42px;height:42px;border-radius:50%;border:1px solid var(--line);background:#fff;color:var(--ink);font-size:18px;cursor:pointer;display:grid;place-items:center;transition:border-color .15s,color .15s}
.ac-btn:hover:not(:disabled){border-color:var(--brand);color:var(--brand)}.ac-btn:disabled{opacity:.35;cursor:default}
.ac-track{--cw:min(460px,80vw);position:relative;display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;padding:4px 2px 18px;margin:0 -2px;outline:none}
.ac-card{flex:0 0 var(--cw);scroll-snap-align:center;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:24px;display:flex;flex-direction:column}
/* Coverflow vòng tròn (app.js thêm .cf, đặt --x --s --o cho từng thẻ): thẻ giữa to và nổi,
   hai bên nhỏ dần, lùi ra sau, mờ như ở xa; kéo/vuốt hai phía không có điểm dừng. Không JS thì là hàng cuộn ngang ở trên. */
.ac-track.cf{display:block;overflow:hidden;padding:0;margin:0;touch-action:pan-y;user-select:none;-webkit-user-select:none;cursor:grab;-webkit-mask:linear-gradient(90deg,transparent,#000 10%,#000 90%,transparent);mask:linear-gradient(90deg,transparent,#000 10%,#000 90%,transparent)}
.ac-track.cf.keo{cursor:grabbing}
.ac-track.cf .ac-card{position:absolute;left:50%;top:50%;width:var(--cw);transform:translate(calc(-50% + var(--x,0px)),-50%) scale(var(--s,1));opacity:var(--o,1);transform-origin:50% 50%;transition:transform .5s cubic-bezier(.2,.7,.2,1),opacity .5s,box-shadow .3s,border-color .3s,filter .5s;will-change:transform}
.ac-track.cf.keo .ac-card{transition:none}
.ac-track.cf .ac-card:not(.on){filter:saturate(.55);pointer-events:auto}
.ac-track.cf .ac-card.on{box-shadow:0 28px 60px -24px rgba(120,60,20,.42);border-color:#f0cfb4}
.ac-track.cf .ac-card img{-webkit-user-drag:none}
.ac-top{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:16px}
.ac-top img{width:88px;height:88px;border-radius:50%;object-fit:cover;background:var(--soft)}
.ac-deg{font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--brand);background:var(--soft);padding:4px 10px;border-radius:999px}
.ac-card h3{margin:0 0 4px;font-size:19px}
.ac-card .cred{font-size:14px;font-weight:600;color:var(--brand);margin:0}
.ac-card .ticks{font-size:14.5px;margin:12px 0 0}.ac-card .ticks li{margin:6px 0}
.ac-lbl{margin:auto 0 8px!important;padding-top:16px;font-size:12px!important;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--mute)!important}
.ac-tags{display:flex;flex-wrap:wrap;gap:6px}.ac-tags span{font-size:13px;color:var(--ink2);background:#faf4ec;border:1px solid var(--line);padding:3px 9px;border-radius:999px}
.ac-foot{margin:6px 0 0;text-align:center;font-size:14px;color:var(--mute)}.ac-foot .ac-more{display:block;margin-bottom:4px}
@media(max-width:640px){.ac-track{--cw:76vw}.ac-nav{display:none}}
@media(prefers-reduced-motion:reduce){.ac-track.cf .ac-card{transition:none}}

/* ===== 18/10/2026 Lớp làm đẹp theo logo lửa-lá (chỉ CSS, đè các luật ở trên) =====
   Menu đậm + gạch chân lửa, vạch lửa-lá dưới header, hero/page-h có quầng ấm, nút gradient đỏ,
   thẻ nổi khi rê chuột, số liệu chữ gradient, footer nâu đậm. Chữ trắng trên nút ≥5.6:1. */
:root{--grad:linear-gradient(135deg,#c62828 0%,#e8620c 100%);
  --grad-btn:linear-gradient(135deg,#bf3a22 0%,#a8321e 55%,#8a2816 100%);
  --sh-sm:0 1px 2px rgba(80,40,20,.05),0 4px 12px -6px rgba(80,40,20,.10);
  --sh-md:0 18px 36px -18px rgba(120,55,20,.35)}
main{overflow-x:clip}
/* header */
header.top{border-bottom:0;box-shadow:0 6px 18px -14px rgba(80,40,20,.35)}
header.top:after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:linear-gradient(90deg,#c62828,#e8620c 55%,#2e7d32)}
nav.main{gap:2px;margin-left:14px}
nav.main a{position:relative;padding:8px 12px;color:var(--ink);font-weight:600;font-size:15.5px;letter-spacing:-.005em;transition:color .15s,background .15s}
nav.main a:after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2.5px;border-radius:2px;background:var(--grad);transform:scaleX(0);transform-origin:left;transition:transform .22s ease}
nav.main a:hover{background:var(--soft);color:var(--brand)}
nav.main a.on{background:transparent;color:var(--brand)}
nav.main a:hover:after,nav.main a.on:after{transform:scaleX(1)}
@media(max-width:980px){nav.main a:after{display:none}nav.main.open a{padding:11px 12px;font-size:16px}nav.main.open a.on{background:var(--soft)}}
/* nút */
.btn{transition:transform .15s,box-shadow .15s,filter .15s,border-color .15s,color .15s}
.btn.p{background:var(--grad-btn);box-shadow:0 8px 18px -10px rgba(168,50,30,.75)}
.btn.p:hover{background:var(--grad-btn);filter:brightness(.93);transform:translateY(-1px);box-shadow:0 12px 24px -12px rgba(168,50,30,.8)}
.btn.s{box-shadow:var(--sh-sm)}.btn.s:hover{border-color:#ecb48c;color:var(--brand)}
/* hero + đầu trang con: quầng lửa ấm phía sau */
.hero,.page-h{position:relative;isolation:isolate}
.hero:before,.page-h:before{content:"";position:absolute;z-index:-1;inset:-62px -40vw 0;pointer-events:none;
  background:radial-gradient(640px 360px at 72% 22%,rgba(232,98,12,.14),transparent 70%),
             radial-gradient(520px 300px at 30% 0%,rgba(198,40,40,.08),transparent 70%),
             radial-gradient(520px 280px at 85% 92%,rgba(46,125,50,.08),transparent 70%)}
.hero h1,.page-h h1{letter-spacing:-.035em}
.page-h p+.cta{margin-top:22px}
.wrap.page-h{padding-left:20px;padding-right:20px} /* .page-h{padding:64px 0 30px} từng xoá lề của .wrap → đầu trang con lệch trái, sát mép trên điện thoại */
.kicker{background:var(--soft);border:1px solid #f6d3b8;padding:5px 12px;border-radius:999px}
/* số liệu */
.proof div{position:relative;overflow:hidden;box-shadow:var(--sh-sm);padding:18px 20px}
.proof div:before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--grad)}
.proof b{font-size:30px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
/* khu xen kẽ: kem ấm thay trắng, thẻ trắng nổi lên */
section.alt{background:linear-gradient(180deg,#fff6ec 0%,#fffaf3 100%);border-color:#f1e4d4}
section .wrap>h2:first-child:before{content:"";display:block;width:44px;height:4px;border-radius:4px;background:var(--grad);margin-bottom:16px}
.card{box-shadow:var(--sh-sm);transition:transform .2s ease,box-shadow .2s ease,border-color .2s}
.grid .card:hover{transform:translateY(-3px);box-shadow:var(--sh-md);border-color:#f0cfb4}
.card .tag{border:1px solid #f6d3b8;border-radius:999px;padding:3px 10px}
.card .more:after{content:"→";display:inline-block;margin-left:6px;transition:transform .15s}
.card .more:hover:after{transform:translateX(3px)}
.steps .card:before{box-shadow:0 0 0 5px var(--soft)}
.faq details{box-shadow:var(--sh-sm)}.faq details[open]{border-color:#f0cfb4}
.faq summary::marker{color:var(--accent)}
/* footer nâu đậm */
footer{background:#1f1a17;color:#b9ada2;border-top:0;position:relative}
footer:before{content:"";position:absolute;left:0;right:0;top:0;height:3px;background:linear-gradient(90deg,#c62828,#e8620c 55%,#2e7d32)}
footer h4{color:#fff3e6}
footer a{color:#e6d9cc}footer a:hover{color:#ffb27a}
@media(prefers-reduced-motion:reduce){.btn,.card,nav.main a:after{transition:none}.grid .card:hover,.btn.p:hover{transform:none}}