:root{--bg:#F4F6F9;--card:#fff;--ink:#171B2E;--muted:#5C6478;--faint:#9AA3B5;--line:#E2E6EE;--soft:#EEF0F5;--teal:#0E8F7E;--gold:#F5B82E;--c:#0E8F7E;--good:#0E8F7E;--warn:#B7791F;--bad:#B4432F;--r:18px;--shadow:0 1px 0 var(--line),0 8px 24px -16px rgba(23,27,46,.18)}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
html,body{margin:0;background:var(--bg);color:var(--ink);font-family:'Be Vietnam Pro',system-ui,-apple-system,sans-serif;-webkit-font-smoothing:antialiased;line-height:1.5}
a{color:var(--teal);text-decoration:none}
img,svg{max-width:100%}
button,input,textarea{font-family:inherit}
:focus-visible{outline:3px solid color-mix(in srgb,var(--c) 45%,transparent);outline-offset:2px;border-radius:8px}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* khung trang */
.page{max-width:640px;margin:0 auto;padding:12px 20px 56px;display:flex;flex-direction:column;gap:28px;animation:rise .35s ease both}
.page-wide{max-width:none;padding:0;gap:0}
@keyframes rise{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.top{position:sticky;top:0;z-index:20;background:#0B1120;color:#fff;transition:box-shadow .2s}
.top.scrolled{box-shadow:0 8px 24px -12px rgba(0,0,0,.5)}
.top-inner{max-width:1080px;margin:0 auto;padding:12px 20px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:10px;color:#fff}
.brand-mark{width:34px;height:34px;border-radius:10px;background:var(--teal);display:inline-grid;place-items:center;color:#fff;font-size:17px;font-weight:800;flex-shrink:0;box-shadow:0 6px 16px -6px rgba(14,143,126,.7)}
.brand-text{display:flex;flex-direction:column;line-height:1.1;font-weight:800;font-size:18px;letter-spacing:-.02em}
.brand-text small{font-weight:500;font-size:11px;color:#F5B82E;letter-spacing:0}
.top-nav{display:flex;gap:4px;font-size:14px;font-weight:600;margin-left:auto}
.top-nav a{color:#D5DAE6;padding:8px 12px;border-radius:10px;transition:background .15s,color .15s}.top-nav a:hover{background:rgba(255,255,255,.08);color:#fff}
.btn-sm{height:40px;padding:0 16px;font-size:14px;border-radius:10px}
.promo{background:linear-gradient(90deg,#F5B82E,#F7C95A);color:#171B2E;text-align:center;font-size:13px;font-weight:600;padding:9px 16px}
.promo span{background:#171B2E;color:#F5B82E;font-size:11px;padding:3px 8px;border-radius:999px;margin-right:8px;letter-spacing:.04em;text-transform:uppercase}
.promo a{color:#171B2E;font-weight:800;margin-left:6px}
.foot{background:#0B1120;color:#B8BFD0;font-size:13px}
.foot-inner{max-width:1080px;margin:0 auto;padding:40px 20px 48px;display:flex;flex-direction:column;gap:28px}
.foot-brand{color:#fff;font-weight:800;font-size:17px;display:flex;align-items:center;gap:10px}
.foot-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.foot-cols div{display:flex;flex-direction:column;gap:8px}.foot-cols b{color:#fff;margin-bottom:4px}.foot-cols a{color:#B8BFD0}.foot-cols a:hover{color:#fff}
.foot-note{font-size:12px;color:#7D8699;line-height:1.6;border-top:1px solid rgba(255,255,255,.08);padding-top:20px}
@media (max-width:720px){.top-nav{display:none}.foot-cols{grid-template-columns:1fr 1fr}}

/* chữ */
.h1{margin:0;font-size:32px;line-height:1.1;font-weight:800;letter-spacing:-.03em;text-wrap:balance}
.hero{display:flex;flex-direction:column;gap:10px;padding-top:12px}
.hero h1{margin:0;font-size:44px;line-height:1.02;font-weight:800;letter-spacing:-.035em}
.lead{margin:0;font-size:17px;color:var(--muted);max-width:34ch}
.h2{margin:0;font-size:20px;font-weight:800;letter-spacing:-.015em}
.body{font-size:15.5px;line-height:1.65;color:#3C4458}.body p{margin:0 0 12px}.body p:last-child{margin:0}
.small{font-size:13px}.muted{color:var(--muted)}.strong{font-weight:700}.center{text-align:center}.good{color:var(--good)}.gold{color:var(--gold)}
.eyebrow{font-size:12px;font-weight:700;color:var(--muted);letter-spacing:.08em;text-transform:uppercase}
.stack{display:flex;flex-direction:column;gap:12px}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
.between{display:flex;justify-content:space-between;align-items:center;gap:10px}
.grow{flex:1;min-width:0}

/* thẻ */
.card{background:var(--card);border-radius:var(--r);padding:16px;box-shadow:var(--shadow);color:var(--ink)}
.card-dark{background:var(--ink);color:#fff}
.card.dashed{border:1px dashed #C9D0DC;box-shadow:none;background:transparent}
a.card{transition:transform .18s,box-shadow .18s}a.card:hover{transform:translateY(-2px);box-shadow:0 1px 0 var(--line),0 14px 28px -16px rgba(23,27,46,.28)}
.test-card{display:flex;flex-direction:column;gap:10px;min-height:150px}
.test-card-top{display:flex;justify-content:space-between;align-items:flex-start}
.test-card-name{font-weight:700;font-size:16px;line-height:1.25;letter-spacing:-.01em}
.test-icon{width:44px;height:44px;border-radius:14px;background:color-mix(in srgb,var(--c) 13%,#fff);color:var(--c);display:inline-grid;place-items:center;flex-shrink:0}
.test-icon svg{width:24px;height:24px}
.test-row{display:flex;flex-direction:column;gap:14px;padding:18px}
.test-row-head{display:flex;gap:14px;align-items:center}
.test-row .btn{width:100%}
.result-badge{width:44px;height:44px;border-radius:12px;color:#fff;font-weight:800;font-size:13px;display:grid;place-items:center;flex-shrink:0;letter-spacing:.02em}
.badge{font-size:10px;font-weight:700;padding:4px 7px;border-radius:6px;background:var(--soft);color:var(--muted);letter-spacing:.06em}
.badge.c{background:color-mix(in srgb,var(--c) 13%,#fff);color:var(--c)}
.badge.gold{background:var(--gold);color:var(--ink);position:absolute;top:-10px;right:14px;border-radius:999px;padding:3px 8px;font-size:11px}

/* nút */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 18px;border-radius:12px;border:0;font-weight:700;font-size:15px;cursor:pointer;text-align:center;transition:transform .12s,box-shadow .18s,background .15s;user-select:none}
.btn:active{transform:scale(.985)}
.btn-lg{height:54px;border-radius:14px;font-size:16px}
.btn-dark{background:var(--ink);color:#fff}.btn-dark:hover{background:#262c45}
.btn-accent{background:var(--c);color:#fff;box-shadow:0 10px 24px -8px color-mix(in srgb,var(--c) 55%,transparent)}.btn-accent:hover{filter:brightness(1.05)}
.btn-gold{background:var(--gold);color:var(--ink)}.btn-gold:hover{background:#f7c24a}
.btn-light{background:#fff;color:var(--c)}
.btn-ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.5)}
.btn-soft{background:var(--soft);color:var(--ink);height:40px;padding:0 14px}
.link{font-size:14px;font-weight:600}.link-btn{background:none;border:0;color:var(--muted);font-size:14px;padding:12px 8px;cursor:pointer}
.back{font-size:14px;font-weight:600;color:var(--ink);display:inline-flex;align-items:center;gap:6px}

/* chip, danh sách, biểu mẫu */
.chips{display:flex;gap:8px;flex-wrap:wrap}
.chip{font-size:13px;font-weight:600;background:#fff;padding:8px 12px;border-radius:10px;display:inline-flex;align-items:center;gap:6px}.chip-good{color:var(--good)}
.checks{margin:0;padding:0;list-style:none;display:flex;flex-direction:column;gap:12px;font-size:14.5px}
.checks li{display:flex;gap:10px;align-items:flex-start;color:#3C4458}.ck{width:18px;height:18px;flex-shrink:0;color:var(--good);margin-top:2px}
.list{display:flex;flex-direction:column;padding:0;overflow:hidden}
.list-row{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:14px 16px;border-top:1px solid var(--soft);color:var(--ink);font-size:14px;transition:background .15s}
.list-row:first-child{border-top:0}a.list-row:hover{background:#FAFBFD}
.rank{width:26px;font-weight:800;color:var(--c);font-variant-numeric:tabular-nums}
.notice{background:#FFF6DF;color:#5C4A12;border-radius:12px;padding:12px 14px;font-size:13px;line-height:1.5}.notice.warn{color:var(--ink)}
.field{display:flex;flex-direction:column;gap:6px;font-size:13px;font-weight:600}
.field input{height:50px;border-radius:12px;border:1.5px solid var(--line);padding:0 14px;font-size:15px;background:#fff;transition:border-color .15s}
.field input:focus{outline:none;border-color:var(--ink)}
.option{display:flex;gap:14px;align-items:flex-start;background:#fff;border:2px solid var(--line);border-radius:16px;padding:16px;cursor:pointer;position:relative;font-size:14px;transition:border-color .15s}
.option.selected,.option:has(input:checked){border-color:var(--ink)}
.option input{margin:3px 0 0;width:20px;height:20px;accent-color:var(--ink)}
.option-col{flex-direction:column;align-items:center;gap:8px;padding:12px 8px;font-weight:600;font-size:13px}.option-col input{position:absolute;opacity:0}
.crumbs{font-size:12px;color:var(--faint)}.crumbs a{color:var(--faint)}

/* dải kết quả chia sẻ */
.strip{display:flex;gap:10px;overflow-x:auto;padding-bottom:4px;scrollbar-width:none;margin:0 -20px;padding-inline:20px}.strip::-webkit-scrollbar{display:none}
.strip-chip{display:inline-flex;align-items:center;gap:8px;padding:8px 14px 8px 8px;background:#fff;border-radius:999px;box-shadow:var(--shadow);flex-shrink:0;font-size:13px;font-weight:700;color:var(--ink)}
.strip-chip i{width:26px;height:26px;border-radius:50%;display:inline-block}

/* trang giới thiệu */
.intro-head{background:color-mix(in srgb,var(--c) 12%,#fff);margin:0 -20px;padding:16px 20px 26px;display:flex;flex-direction:column;gap:14px;border-radius:0 0 28px 28px;position:relative;overflow:hidden}
.intro-head::after{content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;border-radius:50%;background:color-mix(in srgb,var(--c) 10%,transparent)}
.intro-head>*{position:relative}
.sample{display:flex;gap:14px;align-items:center}
.sample-grid{width:84px;height:84px;border-radius:12px;background:var(--soft);display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:4px;padding:8px;flex-shrink:0}
.sample-grid i{border-radius:3px;background:var(--c)}.sample-grid i:nth-child(n+4){border-radius:50%;background:var(--ink)}.sample-grid i:nth-child(n+7){background:transparent;border:2px solid var(--ink)}.sample-grid i:nth-child(9){border-style:dashed;border-color:var(--faint)}
.sample-scale{display:flex;align-items:center;justify-content:space-between;width:150px;flex-shrink:0}
.sample-scale i{border-radius:50%;border:3px solid var(--line);display:block}
.sample-scale i:nth-child(1),.sample-scale i:nth-child(5){width:30px;height:30px}.sample-scale i:nth-child(2),.sample-scale i:nth-child(4){width:24px;height:24px}.sample-scale i:nth-child(3){width:18px;height:18px}
.sample-scale i:nth-child(1){border-color:#E0742B}.sample-scale i:nth-child(5){border-color:var(--c);background:var(--c)}
.faq{display:flex;flex-direction:column}
.faq details{border-top:1px solid var(--line)}.faq details:last-child{border-bottom:1px solid var(--line)}
.faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;padding:14px 0;font-size:14.5px;font-weight:500}
.faq summary::-webkit-details-marker{display:none}.faq summary::after{content:"+";color:var(--muted);font-size:18px;transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq .body{padding:0 0 14px}
.sticky-cta{position:sticky;bottom:12px;z-index:5}

/* làm bài */
.take{min-height:100vh;display:flex;flex-direction:column;gap:18px;padding-top:4px}
.take-top{display:flex;align-items:center;justify-content:space-between}
.icon-btn{width:40px;height:40px;display:grid;place-items:center;border-radius:10px;color:var(--ink);font-size:20px;background:transparent;border:0;cursor:pointer;transition:background .15s}.icon-btn:hover{background:var(--soft)}
.icon-btn.light{background:rgba(255,255,255,.14);color:#fff}
.take-count{font-size:14px;font-weight:600;color:var(--muted);font-variant-numeric:tabular-nums}
.take-timer{font-size:14px;font-weight:700;font-variant-numeric:tabular-nums;background:var(--soft);padding:8px 12px;border-radius:10px;transition:background .3s,color .3s}
.take-timer.warn{background:#FFF6DF;color:var(--warn)}.take-timer.danger{background:#FDF1EE;color:var(--bad);animation:blink 1s step-end infinite}
@keyframes blink{50%{opacity:.5}}
.take-timer-space{width:40px}
.progress{height:6px;border-radius:999px;background:var(--line);overflow:hidden}
.progress-bar{height:100%;width:0;background:var(--c);border-radius:999px;transition:width .35s cubic-bezier(.2,.8,.2,1)}
.ready{display:flex;flex-direction:column;align-items:center;gap:20px;padding:24px 0;text-align:center}
.ready-time{font-size:64px;font-weight:800;letter-spacing:-.04em;color:var(--c);line-height:1;font-variant-numeric:tabular-nums}
.ready-rules{text-align:left;background:var(--soft);border-radius:16px;padding:16px 16px 16px 36px;margin:0;font-size:14px;display:flex;flex-direction:column;gap:8px;width:100%}
.question{display:flex;flex-direction:column;gap:20px;flex:1;animation:qin .28s cubic-bezier(.2,.8,.2,1) both}
.question.out{animation:qout .18s ease both}
@keyframes qin{from{opacity:0;transform:translateX(24px)}to{opacity:1;transform:none}}
@keyframes qout{to{opacity:0;transform:translateX(-24px)}}
.q-prompt{text-align:center;letter-spacing:.06em;text-transform:uppercase;font-weight:700;font-size:12px;color:var(--faint)}
.q-context{background:var(--soft);border-radius:14px;padding:14px;font-size:15px;line-height:1.5}
.q-image{display:flex;justify-content:center}.q-image img{width:300px;height:300px;border-radius:20px;background:var(--soft)}
.q-text{font-size:23px;line-height:1.35;font-weight:600;text-align:center;letter-spacing:-.01em;text-wrap:balance}
.q-options{display:flex;flex-direction:column;gap:10px}
.q-options.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr))}
.opt{min-height:52px;border-radius:14px;border:1.5px solid var(--line);background:#fff;font-size:15px;text-align:left;padding:14px 16px;cursor:pointer;color:var(--ink);line-height:1.4;transition:border-color .15s,transform .12s,box-shadow .15s}
.opt:hover{border-color:#C9D0DC}.opt:active{transform:scale(.985)}
.opt.img{height:92px;padding:6px;display:grid;place-items:center}.opt.img img{width:100%;height:100%;object-fit:contain}
.opt.picked{border-color:var(--c);box-shadow:0 0 0 2px var(--c) inset}
.likert{display:flex;flex-direction:column;gap:14px;padding-top:8px}
.likert-row{display:flex;align-items:center;justify-content:space-between}
.dot{border-radius:50%;background:#fff;border:3px solid var(--line);cursor:pointer;padding:0;transition:transform .15s,background .15s}
.dot:hover{transform:scale(1.08)}
.dot[data-v="1"],.dot[data-v="5"]{width:60px;height:60px}.dot[data-v="2"],.dot[data-v="4"]{width:46px;height:46px}.dot[data-v="3"]{width:36px;height:36px}
.dot[data-v="1"]{border-color:#E0742B}.dot[data-v="2"]{border-color:#EDB08A}.dot[data-v="4"]{border-color:color-mix(in srgb,var(--c) 55%,#fff)}.dot[data-v="5"]{border-color:var(--c)}
.dot.picked{background:var(--c);border-color:var(--c);transform:scale(1.12)}.dot[data-v="1"].picked,.dot[data-v="2"].picked{background:#E0742B;border-color:#E0742B}
.likert-labels{display:flex;justify-content:space-between;font-size:13px;font-weight:600}.likert-labels span:first-child{color:#E0742B}.likert-labels span:last-child{color:var(--c)}
.q-foot{display:flex;justify-content:space-between;margin-top:auto}
.spinner{width:56px;height:56px;border-radius:50%;border:6px solid var(--soft);border-top-color:var(--c);animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* kết quả */
.result-head{background:var(--c);color:#fff;margin:0 -20px;padding:14px 20px 26px;display:flex;flex-direction:column;align-items:center;gap:8px;border-radius:0 0 28px 28px;text-align:center;position:relative;overflow:hidden}
.result-head::before,.result-head::after{content:"";position:absolute;border-radius:50%;background:rgba(255,255,255,.08)}
.result-head::before{width:320px;height:320px;left:-120px;bottom:-200px}.result-head::after{width:200px;height:200px;right:-70px;top:-70px}
.result-head>*{position:relative}
.result-topbar{width:100%;display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.result-headline{font-size:76px;line-height:1;font-weight:800;letter-spacing:-.045em;font-variant-numeric:tabular-nums;animation:pop .5s cubic-bezier(.2,.8,.2,1) both}
@keyframes pop{from{opacity:0;transform:scale(.92)}to{opacity:1;transform:none}}
.result-sub{font-size:19px;font-weight:700}
.pill{font-size:13px;background:rgba(255,255,255,.16);padding:6px 12px;border-radius:999px}
.share-row{display:flex;gap:8px;width:100%;margin-top:12px}.share-row .btn{flex:1;height:44px;font-size:14px}
.bars{display:flex;flex-direction:column;gap:18px;padding:18px}
.bar{display:flex;flex-direction:column;gap:7px}
.bar-labels{display:flex;justify-content:space-between;font-size:13px;gap:8px}
.bar-track{position:relative;height:10px;border-radius:999px;background:var(--soft);overflow:hidden}
.bar-fill{position:absolute;top:0;height:100%;border-radius:999px;animation:grow .7s cubic-bezier(.2,.8,.2,1) both;transform-origin:left}
.bar-fill.from-left{animation-name:growL}
@keyframes grow{from{transform:scaleX(0)}to{transform:none}}
@keyframes growL{from{transform:scaleX(0);transform-origin:right}to{transform:none;transform-origin:right}}
.bar-mid{position:absolute;left:50%;top:-2px;width:2px;height:14px;background:#fff}
.teaser{position:relative;display:flex;flex-direction:column;gap:10px;max-height:170px;overflow:hidden}
.teaser .fade{position:absolute;left:0;right:0;bottom:0;height:90px;background:linear-gradient(to bottom,rgba(244,246,249,0),var(--bg) 80%)}
.paywall{background:var(--ink);color:#fff;border-radius:20px;padding:22px 20px;display:flex;flex-direction:column;gap:14px;margin-top:-8px;box-shadow:0 24px 40px -24px rgba(23,27,46,.5)}
.paywall-title{font-size:21px;font-weight:800;letter-spacing:-.02em;line-height:1.2}
.paywall-list{margin:0;padding:0;list-style:none;display:flex;flex-direction:column;gap:9px;font-size:14px}
.paywall-list li{display:flex;gap:10px;align-items:flex-start}.paywall-list .ck{color:var(--gold)}
.paywall-foot{display:flex;justify-content:space-between;font-size:13px;color:#B8BFD0}.paywall-foot a{color:#fff;font-weight:600}
.unlocked{font-weight:600;font-size:14px;display:flex;align-items:center;gap:8px}
.premium .num{display:inline-grid;place-items:center;width:26px;height:26px;border-radius:8px;background:color-mix(in srgb,var(--c) 13%,#fff);color:var(--c);font-size:13px;margin-right:8px;vertical-align:middle}
.check-big{width:84px;height:84px;border-radius:50%;background:color-mix(in srgb,var(--teal) 15%,#fff);display:grid;place-items:center;margin:16px auto 0}
.check-big i{width:60px;height:60px;border-radius:50%;background:var(--teal);color:#fff;font-size:30px;display:grid;place-items:center;font-style:normal}
.check-big.is-fail{background:#FDF1EE}.check-big.is-fail i{background:#B4432F}
.check-big.is-wait{background:#FFF6E0}.check-big.is-wait i{background:#D08A12}
.type-hero{background:color-mix(in srgb,var(--c) 14%,#fff);border-radius:20px;padding:22px 20px;display:flex;flex-direction:column;align-items:center;gap:10px;text-align:center}
.type-avatar{width:96px;height:96px;border-radius:50%;background:var(--c);opacity:.9}
@media (max-width:420px){.hero h1{font-size:38px}.result-headline{font-size:64px}}

/* ===== trang chủ kiểu landing ===== */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s cubic-bezier(.2,.8,.2,1)}
.reveal.in{opacity:1;transform:none}
.sparkles{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.hero-x{position:relative;overflow:hidden;background:radial-gradient(1200px 500px at 50% -10%,#E3F4F0 0%,var(--bg) 60%);padding:72px 20px 56px;text-align:center}
.hero-x-inner{position:relative;max-width:760px;margin:0 auto;display:flex;flex-direction:column;align-items:center;gap:22px}
.pill-outline{font-size:13px;font-weight:600;color:var(--teal);border:1px solid color-mix(in srgb,var(--teal) 35%,transparent);background:rgba(255,255,255,.7);padding:8px 14px;border-radius:999px}
.hero-x h1{margin:0;font-size:clamp(34px,6vw,60px);line-height:1.05;font-weight:900;letter-spacing:-.04em;color:var(--ink)}
.hero-x h1 em{font-style:normal;color:var(--teal)}
.hero-x .lead{max-width:56ch;font-size:clamp(16px,2.2vw,19px)}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;justify-content:center}
.btn-xl{height:58px;padding:0 26px;border-radius:16px;font-size:17px}
.btn-primary{background:var(--teal);color:#fff;box-shadow:0 14px 30px -10px rgba(14,143,126,.6)}.btn-primary:hover{background:#0B7566}
.btn-outline{background:#fff;color:var(--ink);border:1.5px solid var(--line)}.btn-outline:hover{border-color:var(--ink)}
.hero-trust{display:flex;gap:18px;flex-wrap:wrap;justify-content:center;font-size:13px;color:var(--muted)}
.stats-band{background:#0E4F46;color:#fff;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));max-width:none}
.stats-band>div{padding:28px 12px;text-align:center;border-left:1px solid rgba(255,255,255,.12);display:flex;flex-direction:column;gap:4px}
.stats-band>div:first-child{border-left:0}
.stats-band b{font-size:34px;font-weight:800;letter-spacing:-.03em;line-height:1}.stats-band b small{font-size:16px;font-weight:600;margin-left:4px}
.stats-band span{font-size:12px;opacity:.85}
@media (max-width:640px){.stats-band{grid-template-columns:1fr 1fr}.stats-band>div:nth-child(3){border-left:0}.stats-band>div:nth-child(n+3){border-top:1px solid rgba(255,255,255,.12)}}
.section{padding:56px 20px;max-width:1080px;margin:0 auto;display:flex;flex-direction:column;gap:22px}
.section.dark{max-width:none;background:radial-gradient(900px 400px at 80% 0%,#163a4f 0%,#0B1120 55%);color:#fff;position:relative;overflow:hidden}
.section-inner{position:relative;max-width:1080px;margin:0 auto;display:flex;flex-direction:column;gap:22px}
.h2.light,.light{color:#fff}.gold-dark{color:#B7791F}
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:8px}
.step{text-align:center;display:flex;flex-direction:column;gap:8px;padding:0 8px}
.step b{font-size:44px;font-weight:900;color:var(--teal);line-height:1;letter-spacing:-.03em}
.step h3{margin:6px 0 0;font-size:17px;font-weight:700}.step p{margin:0;font-size:14px;color:var(--muted);line-height:1.6}
@media (max-width:720px){.steps{grid-template-columns:1fr;gap:28px}}
.services{display:flex;flex-direction:column;gap:22px;margin-top:6px}
.service{position:relative;background:linear-gradient(135deg,rgba(255,255,255,.07),rgba(255,255,255,.03));border:1px solid rgba(255,255,255,.1);border-radius:22px;padding:28px;display:grid;grid-template-columns:1.25fr 1fr;gap:28px;transition:transform .2s,border-color .2s,box-shadow .2s}
.service:hover{transform:translateY(-3px);border-color:color-mix(in srgb,var(--c) 55%,transparent);box-shadow:0 30px 50px -30px color-mix(in srgb,var(--c) 60%,transparent)}
.service::before{content:"";position:absolute;inset:0;border-radius:22px;background:radial-gradient(500px 200px at 0% 0%,color-mix(in srgb,var(--c) 22%,transparent),transparent 70%);pointer-events:none}
.service>*{position:relative}
.ribbon{position:absolute;top:-14px;left:22px;background:var(--gold);color:var(--ink);font-size:12px;font-weight:700;padding:6px 12px;border-radius:999px;box-shadow:0 6px 16px -6px rgba(245,184,46,.7)}
.service-main{display:flex;flex-direction:column;gap:12px;align-items:flex-start}
.service .badge.c{background:color-mix(in srgb,var(--c) 22%,transparent);color:#fff;border:1px solid color-mix(in srgb,var(--c) 45%,transparent);font-size:11px;padding:6px 10px;border-radius:999px}
.service h3{margin:4px 0 0;font-size:clamp(24px,3vw,32px);font-weight:800;letter-spacing:-.025em;line-height:1.1}
.service-tag{margin:0;color:#C9D0DC;font-size:15px;line-height:1.5}
.service-price{display:flex;align-items:baseline;gap:12px;margin-top:4px}
.service-price s{color:#7D8699;font-size:13px}.service-price b{font-size:36px;font-weight:900;letter-spacing:-.03em;color:#fff}.service-price .off{background:color-mix(in srgb,var(--c) 30%,transparent);color:#fff;font-size:12px;font-weight:600;padding:4px 8px;border-radius:8px}
.service-meta{display:flex;gap:16px;flex-wrap:wrap;font-size:13px;color:#B8BFD0}
.service-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:6px}
.btn-c{background:var(--c);color:#fff;box-shadow:0 12px 24px -10px color-mix(in srgb,var(--c) 70%,transparent)}.btn-c:hover{filter:brightness(1.08)}
.btn-outline-light{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.25)}.btn-outline-light:hover{border-color:#fff}
.service-includes{background:rgba(0,0,0,.25);border:1px solid rgba(255,255,255,.08);border-radius:16px;padding:20px;display:flex;flex-direction:column;gap:10px}
.service-includes .eyebrow{color:#9AA3B5}
.service-includes ul{margin:0;padding:0;list-style:none;display:flex;flex-direction:column;gap:9px;font-size:14px;color:#E6EAF2}
@media (max-width:760px){.service{grid-template-columns:1fr;padding:24px 20px}.service-price b{font-size:30px}}
.all-card{margin-top:10px;background:linear-gradient(135deg,rgba(245,184,46,.16),rgba(245,184,46,.04));border:1px solid rgba(245,184,46,.35);border-radius:20px;padding:24px;display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.all-card h3{margin:6px 0;font-size:22px;font-weight:800;letter-spacing:-.02em}.all-card p{margin:0;color:#C9D0DC;font-size:14px;max-width:56ch}
.center-strip{justify-content:center;margin:0;padding-inline:0;flex-wrap:wrap;overflow:visible}
.trust-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.trust{background:#fff;border-radius:18px;padding:22px;display:flex;flex-direction:column;gap:8px;box-shadow:var(--shadow)}
.trust-ico{font-size:26px}.trust b{font-size:16px}.trust p{margin:0;font-size:14px;color:var(--muted);line-height:1.55}
@media (max-width:860px){.trust-grid{grid-template-columns:1fr 1fr}}@media (max-width:480px){.trust-grid{grid-template-columns:1fr}}
.faq-wide{max-width:720px;margin:0 auto;width:100%}
@media (max-width:560px){.promo{font-size:12px;padding:8px 12px}.promo span{display:none}}
.all-card-light{background:linear-gradient(135deg,#FFF6DF,#FFFBEF);border:1px solid rgba(183,121,31,.3)}
.all-card-light h3{color:var(--ink)}.all-card-light p{color:var(--muted)}
.test-row .btn-soft{width:auto}
.list-row .rank{display:inline-block;margin-right:10px}

/* làm bài: khung giữa màn trên desktop */
.take-wrap{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;padding:24px 0}
.take{width:100%;max-width:560px;min-height:auto;background:#fff;border-radius:24px;padding:20px 22px 24px;box-shadow:0 1px 0 var(--line),0 30px 60px -40px rgba(23,27,46,.35);border-top:6px solid var(--c)}
.take-hint{text-align:center}
@media (max-width:600px){.take-wrap{padding:0;justify-content:flex-start}.take{max-width:none;border-radius:0;box-shadow:none;border-top:0;padding:16px 20px 24px;min-height:100vh}}
.likert-row{padding:0 4px}
/* blog */
.posts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.posts-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.post-card{display:flex;flex-direction:column;gap:8px;min-height:150px}
.post-card h3{margin:0;font-size:16px;font-weight:700;line-height:1.3;letter-spacing:-.01em}
.post-card .badge{align-self:flex-start}
.strip-chip.active{background:var(--ink);color:#fff}
.post{display:flex;flex-direction:column;gap:14px}
.post-body h2{margin:18px 0 6px}
.post-body ul{margin:0 0 12px;padding-left:20px}
.cta-card{display:flex;align-items:center;gap:14px;background:color-mix(in srgb,var(--c) 10%,#fff);border:1px solid color-mix(in srgb,var(--c) 25%,transparent);border-radius:18px;padding:16px}
@media (max-width:640px){.posts,.posts-3{grid-template-columns:1fr}.cta-card{flex-wrap:wrap}}
/* admin */
.admin{display:flex;flex-direction:column;gap:18px;padding-top:12px}
.admin-top{display:flex;justify-content:space-between;align-items:flex-end;gap:12px}
.kpis{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px}
.kpi{background:#fff;border-radius:14px;padding:14px;display:flex;flex-direction:column;gap:2px;box-shadow:var(--shadow)}
.kpi span{font-size:12px;color:var(--muted)}.kpi b{font-size:28px;font-weight:800;letter-spacing:-.02em;font-variant-numeric:tabular-nums}.kpi small{font-size:11px;color:var(--faint)}
.kpi.gold{background:#FFF6DF}
.chart{width:100%;height:220px;display:block;margin-top:8px}
.admin-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:18px}
.tbl{width:100%;border-collapse:collapse;font-size:13px;margin-top:8px}
.tbl th{text-align:left;color:var(--muted);font-weight:600;padding:6px 8px;border-bottom:1px solid var(--line)}
.tbl td{padding:8px;border-bottom:1px solid var(--soft);font-variant-numeric:tabular-nums}
.tbl code{font-size:12px;background:var(--soft);padding:2px 6px;border-radius:6px}
@media (max-width:900px){.kpis{grid-template-columns:repeat(2,minmax(0,1fr))}.admin-grid{grid-template-columns:1fr}}