/* Beli – Thần Số Học Tỉnh Thức · giao diện chung */
:root{
  --brand:#00ad9f; --primary:#00756b; --primary-h:#005f57; --pink:#ef4881; --pink-ink:#c92f68; --pink-h:#ad2658;
  --ink:#10323d; --muted:#4e6670; --bg:#fbfaf7; --surface:#ffffff; --soft:#eef7f5; --soft2:#fdf1f5; --line:#e2ebe9;
  --on:#ffffff; --gold:#b7892f;
  --r:16px; --r-sm:10px;
  --shadow:0 1px 2px rgba(16,50,61,.05),0 10px 30px rgba(16,50,61,.07);
  --shadow-lg:0 2px 6px rgba(16,50,61,.06),0 24px 48px rgba(16,50,61,.12);
  --serif:"Lora",Georgia,"Times New Roman",serif;
  --sans:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --brand:#1cc4b4; --primary:#23b3a5; --primary-h:#3cc9bb; --pink:#f36b9c; --pink-ink:#f47aa6; --pink-h:#e0578a;
    --ink:#e4eef0; --muted:#9fb6bd; --bg:#0c181c; --surface:#122329; --soft:#10292b; --soft2:#2a1620; --line:#20383f;
    --on:#06201d; --gold:#d9b261;
    --shadow:0 1px 2px rgba(0,0,0,.4); --shadow-lg:0 10px 30px rgba(0,0,0,.45); color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --brand:#1cc4b4; --primary:#23b3a5; --primary-h:#3cc9bb; --pink:#f36b9c; --pink-ink:#f47aa6; --pink-h:#e0578a;
  --ink:#e4eef0; --muted:#9fb6bd; --bg:#0c181c; --surface:#122329; --soft:#10292b; --soft2:#2a1620; --line:#20383f;
  --on:#06201d; --gold:#d9b261;
  --shadow:0 1px 2px rgba(0,0,0,.4); --shadow-lg:0 10px 30px rgba(0,0,0,.45); color-scheme:dark;
}

*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%;scroll-padding-top:84px}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
body{margin:0;background:var(--bg);color:var(--ink);font:400 16px/1.7 var(--sans);-webkit-font-smoothing:antialiased}
img,svg{display:block;max-width:100%}
a{color:inherit}
p{margin:0 0 12px}
h1,h2,h3,h4{font-family:var(--serif);color:var(--ink);line-height:1.25;margin:0 0 12px;font-weight:600;text-wrap:balance}
:focus-visible{outline:3px solid var(--brand);outline-offset:3px;border-radius:6px}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
.narrow{max-width:780px}
.skip{position:absolute;left:-999px;top:8px;z-index:99;background:var(--primary);color:var(--on);padding:10px 16px;border-radius:8px}
.skip:focus{left:8px}
.ic{width:20px;height:20px;flex:none}

/* nút */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 24px;border-radius:999px;font:600 15px/1.2 var(--sans);text-decoration:none;border:1.5px solid transparent;cursor:pointer;transition:background .18s,border-color .18s,color .18s,transform .12s,box-shadow .18s;white-space:nowrap}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--primary);color:var(--on)}
.btn-primary:hover{background:var(--primary-h);box-shadow:0 8px 20px rgba(0,117,107,.25)}
.btn-pink{background:var(--pink-ink);color:#fff}
.btn-pink:hover{background:var(--pink-h);box-shadow:0 8px 20px rgba(201,47,104,.25)}
.btn-ghost{background:transparent;color:var(--primary);border-color:currentColor}
.btn-ghost:hover{background:var(--soft)}
.btn-light{background:#fff;color:#00645c}
.btn-light:hover{background:#eefaf8}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}
.link{color:var(--primary);font-weight:600;text-decoration:none;display:inline-flex;align-items:center;gap:6px}
.link:hover{text-decoration:underline;text-underline-offset:3px}

/* đầu trang */
.hdr{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid transparent;transition:border-color .2s,box-shadow .2s}
.hdr.scrolled{border-bottom-color:var(--line);box-shadow:0 4px 20px rgba(16,50,61,.05)}
.hdr .wrap{display:flex;align-items:center;gap:20px;min-height:72px}
.brand{display:flex;align-items:center;flex:none}
.brand img{height:46px;width:auto}
.nav{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav a{position:relative;text-decoration:none;color:var(--ink);font-size:15px;font-weight:500;padding:10px 12px;border-radius:10px;white-space:nowrap}
.nav a:hover{color:var(--primary)}
.nav a[aria-current="page"]{color:var(--primary);font-weight:600}
.nav a[aria-current="page"]::after{content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;border-radius:2px;background:var(--brand)}
.hdr-cta{flex:none}
.menu-btn{display:none;margin-left:auto;width:46px;height:46px;border-radius:12px;border:1px solid var(--line);background:var(--surface);color:var(--ink);cursor:pointer;align-items:center;justify-content:center}
.menu-btn svg{width:22px;height:22px}
.drawer{position:fixed;inset:0;z-index:60;display:none}
.drawer.open{display:block}
.drawer .scrim{position:absolute;inset:0;background:rgba(6,24,28,.5)}
.drawer .panel{position:absolute;top:0;right:0;bottom:0;width:min(86vw,360px);background:var(--surface);padding:18px 20px 28px;display:flex;flex-direction:column;gap:4px;overflow-y:auto;box-shadow:var(--shadow-lg)}
.drawer .panel .top{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.drawer .panel .top img{height:40px;width:auto}
.drawer .panel a.item{display:flex;align-items:center;min-height:50px;padding:0 12px;border-radius:12px;text-decoration:none;font-weight:500;font-size:17px}
.drawer .panel a.item[aria-current="page"]{background:var(--soft);color:var(--primary);font-weight:600}
.drawer .panel .btn{margin-top:14px}
.x-btn{width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:transparent;color:var(--ink);cursor:pointer;display:grid;place-items:center}

/* khối chung */
.sec{padding:88px 0}
.sec-tight{padding:64px 0}
.sec.alt{background:var(--surface)}
.sec.tint{background:linear-gradient(180deg,var(--soft) 0%,var(--bg) 100%)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font:600 13px/1 var(--sans);letter-spacing:.12em;text-transform:uppercase;color:var(--primary);margin-bottom:14px}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--brand)}
.eyebrow.pink{color:var(--pink-ink)}
.eyebrow.pink::before{background:var(--pink)}
.h2{font-size:clamp(28px,3.6vw,42px);margin-bottom:14px}
.lead{font-size:18px;color:var(--muted);max-width:680px;margin-bottom:0}
.head{margin-bottom:44px}
.head.center{text-align:center}
.head.center .lead{margin-inline:auto}
.head.row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}
.grid{display:grid;gap:24px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:28px;box-shadow:var(--shadow)}
.sec.alt .card{background:var(--bg);box-shadow:none}
.card h3{font-size:21px;margin-bottom:8px}
.card p{color:var(--muted)}
.ico{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;background:var(--soft);color:var(--primary);margin-bottom:18px}
.ico svg{width:26px;height:26px}
.ico.pink{background:var(--soft2);color:var(--pink-ink)}
ul.tick{list-style:none;margin:0 0 16px;padding:0}
ul.tick li{position:relative;padding-left:32px;margin:10px 0}
ul.tick li::before{content:"";position:absolute;left:0;top:.28em;width:20px;height:20px;border-radius:50%;background:var(--brand) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 12.5l4 4 8-9'/%3E%3C/svg%3E") center/12px no-repeat}
.chip{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;padding:6px 12px;border-radius:999px;background:var(--soft);color:var(--primary)}
.chip.pink{background:var(--soft2);color:var(--pink-ink)}
.chip.gray{background:var(--line);color:var(--muted)}

/* hero trang chủ */
.hero{position:relative;overflow:hidden;padding:56px 0 88px;background:radial-gradient(1200px 600px at 85% -10%,rgba(0,173,159,.16),transparent 60%),radial-gradient(800px 500px at -10% 110%,rgba(239,72,129,.10),transparent 60%)}
.hero .wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
.hero h1{font-size:clamp(36px,5.2vw,62px);line-height:1.12;margin-bottom:22px;letter-spacing:-.01em}
.hero h1 em{font-style:normal;color:var(--primary)}
.hero h1 .p{color:var(--pink-ink)}
.hero .sub{font-size:19px;color:var(--muted);max-width:560px;margin-bottom:32px}
.hero .cta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:36px}
.trust{display:flex;flex-wrap:wrap;gap:28px}
.trust div{display:flex;flex-direction:column}
.trust b{font:600 28px/1.1 var(--serif);color:var(--ink)}
.trust span{font-size:14px;color:var(--muted)}
.portrait{position:relative;justify-self:center;width:min(100%,440px)}
.portrait .arch{position:relative;aspect-ratio:560/704;border-radius:220px 220px 28px 28px;overflow:hidden;background:var(--soft);box-shadow:var(--shadow-lg)}
.portrait .arch img{width:100%;height:100%;object-fit:cover}
.portrait .ring{position:absolute;inset:-14px -14px auto auto;width:120px;height:120px;border-radius:50%;border:2px dashed rgba(0,173,159,.45)}
.float{position:absolute;display:flex;gap:12px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:12px 16px;box-shadow:var(--shadow-lg);font-size:14px;line-height:1.35}
.float b{display:block;font-size:15px;color:var(--ink)}
.float span{color:var(--muted)}
.float .dot{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;background:var(--soft);color:var(--primary);flex:none}
.float .dot.pink{background:var(--soft2);color:var(--pink-ink)}
.float.f1{left:-36px;bottom:88px}
.float.f2{right:-24px;top:64px}
.live-dot{width:8px;height:8px;border-radius:50%;background:#e53935;box-shadow:0 0 0 0 rgba(229,57,53,.6);display:inline-block}
@media (prefers-reduced-motion:no-preference){.live-dot{animation:pulse 2s infinite}}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(229,57,53,.55)}70%{box-shadow:0 0 0 10px rgba(229,57,53,0)}100%{box-shadow:0 0 0 0 rgba(229,57,53,0)}}

/* hero trang con */
.phero{padding:56px 0 64px;background:radial-gradient(900px 420px at 90% -20%,rgba(0,173,159,.14),transparent 60%)}
.phero.pinkish{background:radial-gradient(900px 420px at 90% -20%,rgba(239,72,129,.12),transparent 60%)}
.crumb{display:flex;flex-wrap:wrap;gap:6px;font-size:14px;color:var(--muted);margin-bottom:20px;list-style:none;padding:0}
.crumb a{text-decoration:none;color:var(--muted)}
.crumb a:hover{color:var(--primary)}
.crumb li+li::before{content:"/";margin-right:6px;opacity:.6}
.phero h1{font-size:clamp(32px,4.6vw,52px);max-width:880px}
.phero .lead{font-size:19px}
.phero .cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}

/* vấn đề */
.pain{display:flex;gap:16px;align-items:flex-start}
.pain .n{font:600 44px/1 var(--serif);color:var(--brand);opacity:.55;flex:none;width:52px}
.pain h3{font-size:19px}

/* giới thiệu phương pháp */
.split{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.split.rev>:first-child{order:2}
.frame{border-radius:22px;overflow:hidden;box-shadow:var(--shadow-lg);border:1px solid var(--line);background:var(--surface)}
.frame img{width:100%;height:auto}
.quote-line{border-left:3px solid var(--pink);padding:4px 0 4px 18px;font:italic 500 20px/1.55 var(--serif);color:var(--ink);margin:24px 0}

/* lộ trình */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:s;position:relative}
.steps::before{content:"";position:absolute;top:31px;left:12%;right:12%;height:2px;background:repeating-linear-gradient(90deg,var(--brand) 0 8px,transparent 8px 16px);opacity:.5}
.step{position:relative;text-align:center;padding:0 8px}
.step .n{width:62px;height:62px;margin:0 auto 18px;border-radius:50%;display:grid;place-items:center;background:var(--surface);border:2px solid var(--brand);color:var(--primary);font:600 22px/1 var(--serif);position:relative;z-index:1;box-shadow:0 0 0 8px var(--bg)}
.sec.alt .step .n{box-shadow:0 0 0 8px var(--surface)}
.step.p .n{border-color:var(--pink);color:var(--pink-ink)}
.step h3{font-size:19px}
.step p{color:var(--muted);font-size:15px}
.step a{font-size:14px}

/* thẻ khóa học */
.course{display:flex;flex-direction:column;overflow:hidden;padding:0;transition:transform .2s,box-shadow .2s}
.course:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.course .thumb{position:relative;aspect-ratio:16/9;background:var(--soft);overflow:hidden}
.course .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.course:hover .thumb img{transform:scale(1.04)}
.course .thumb .chip{position:absolute;left:14px;top:14px;background:rgba(255,255,255,.94);box-shadow:0 2px 8px rgba(0,0,0,.08)}
.course .thumb.ph{display:grid;place-items:center;background:linear-gradient(135deg,#dff5f1,#fde8f0)}
.course .thumb.ph span{font:600 64px/1 var(--serif);color:rgba(0,117,107,.35)}
.course .body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1}
.course h3{font-size:20px;margin-bottom:10px}
.course h3 a{text-decoration:none}
.course h3 a::after{content:"";position:absolute;inset:0}
.course{position:relative}
.course .meta{display:flex;flex-wrap:wrap;gap:6px 16px;font-size:14px;color:var(--muted);margin-bottom:14px}
.course .meta span{display:inline-flex;align-items:center;gap:6px}
.course .meta svg{width:16px;height:16px;color:var(--primary)}
.course .desc{color:var(--muted);font-size:15px;flex:1}
.course .foot{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:16px;margin-top:8px;border-top:1px solid var(--line)}
.price{font:700 20px/1 var(--sans);color:var(--pink-ink)}
.price small{font-size:13px;font-weight:500;color:var(--muted);margin-left:4px}
.price s{font-size:14px;font-weight:500;color:var(--muted);margin-left:6px}
.course .go{position:relative;z-index:1;font-size:14px}

/* gieo duyên */
.live-band{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;background:linear-gradient(135deg,#00685f 0%,#00897d 60%,#0aa596 100%);color:#fff;border-radius:28px;padding:56px;position:relative;overflow:hidden}
.live-band::after{content:"";position:absolute;right:-80px;bottom:-80px;width:320px;height:320px;border-radius:50%;border:40px solid rgba(255,255,255,.06)}
.live-band h2,.live-band h3{color:#fff}
.live-band p{color:rgba(255,255,255,.88)}
.live-band .eyebrow{color:#bff3ec}
.live-band .eyebrow::before{background:#bff3ec}
.slots{display:grid;gap:12px;position:relative;z-index:1}
.slot{display:flex;gap:16px;align-items:center;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);border-radius:16px;padding:16px 18px}
.slot .d{width:60px;height:60px;border-radius:14px;background:#fff;color:#00685f;display:grid;place-items:center;text-align:center;font:700 18px/1 var(--sans);flex:none}
.slot .d small{display:block;font-size:10px;font-weight:600;letter-spacing:.06em;margin-top:3px;text-transform:uppercase}
.slot b{display:block;font-size:17px}
.slot span{font-size:14px;color:rgba(255,255,255,.8)}
.topics{display:grid;grid-template-columns:repeat(2,1fr);gap:10px 24px;list-style:none;padding:0;margin:0;counter-reset:t}
.topics li{counter-increment:t;display:flex;gap:12px;align-items:center;padding:12px 14px;border-radius:12px;background:var(--surface);border:1px solid var(--line);font-weight:500}
.topics li::before{content:counter(t);width:30px;height:30px;border-radius:50%;background:var(--soft);color:var(--primary);display:grid;place-items:center;font-size:14px;font-weight:700;flex:none}

/* giảng viên */
.mentor{display:grid;grid-template-columns:380px 1fr;gap:56px;align-items:center}
.mentor .ph{border-radius:24px;overflow:hidden;box-shadow:var(--shadow-lg);aspect-ratio:560/704;background:var(--soft)}
.mentor .ph img{width:100%;height:100%;object-fit:cover}
.mentor .role{color:var(--pink-ink);font-weight:600;margin-bottom:18px}
.creds{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:24px 0}
.cred{border:1px solid var(--line);border-radius:14px;padding:16px;background:var(--surface)}
.cred b{display:block;font:600 26px/1.1 var(--serif);color:var(--primary)}
.cred span{font-size:14px;color:var(--muted)}
.team{display:grid;grid-template-columns:repeat(5,1fr);gap:20px}
.member{text-align:center}
.member img{width:112px;height:112px;border-radius:50%;object-fit:cover;margin:0 auto 12px;border:4px solid var(--surface);box-shadow:var(--shadow)}
.member b{display:block;font-family:var(--serif);font-size:17px}
.member span{font-size:14px;color:var(--muted)}

/* cảm nhận */
.tgrid{columns:3;column-gap:24px}
.tcard{break-inside:avoid;margin:0 0 24px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:26px;box-shadow:var(--shadow)}
.tcard .q{font-size:16px;line-height:1.7;margin-bottom:18px;color:var(--ink)}
.tcard .q::before{content:"\201C";display:block;font:700 44px/0.6 var(--serif);color:var(--brand);margin:10px 0 8px}
.tcard .who{display:flex;align-items:center;gap:12px}
.tcard .av{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;font-weight:700;color:#fff;background:linear-gradient(135deg,var(--brand),#0a7d73);flex:none}
.tcard .who b{display:block;font-size:15px}
.tcard .who span{font-size:13px;color:var(--muted)}

/* bài viết */
.post{position:relative;display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;text-decoration:none;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s}
.post:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.post img{width:100%;aspect-ratio:7/6;object-fit:cover}
.post .b{padding:16px 18px 18px}
.post b{display:block;font-family:var(--serif);font-size:18px}
.post small{color:var(--muted)}

/* tra cứu */
.tool{display:flex;flex-direction:column}
.tool .btn{align-self:flex-start;margin-top:auto}

/* chi tiết khóa */
.facts{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:18px;overflow:hidden;margin-top:36px}
.fact{background:var(--surface);padding:18px 20px}
.fact span{display:block;font-size:13px;color:var(--muted);margin-bottom:4px}
.fact b{font-size:17px;color:var(--ink)}
.detail{display:grid;grid-template-columns:1fr 360px;gap:48px;align-items:start}
.aside{position:sticky;top:96px}
.aside .card{padding:24px}
.aside .price{font-size:30px;display:block;margin:6px 0 4px}
.aside dl{display:grid;grid-template-columns:auto 1fr;gap:8px 14px;font-size:15px;margin:18px 0}
.aside dt{color:var(--muted)}
.aside dd{margin:0;font-weight:500}
.aside .btn{width:100%;margin-top:6px}
.aside .note{font-size:13px;color:var(--muted);margin-top:12px}
.prose h2{font-size:28px;margin:44px 0 14px}
.prose h2:first-child{margin-top:0}
.prose h3{font-size:20px;margin:28px 0 10px}
.prose p,.prose li{color:var(--ink)}
.prose .muted{color:var(--muted)}
.cluster{display:grid;gap:12px;margin:14px 0 8px}
.cluster div{border:1px solid var(--line);border-radius:14px;padding:14px 18px;background:var(--surface)}
.cluster b{display:block;color:var(--primary);font-size:15px;margin-bottom:2px}
.cluster span{font-size:15px}
.modlist{counter-reset:m;list-style:none;padding:0;margin:14px 0}
.modlist li{counter-increment:m;display:flex;gap:14px;align-items:flex-start;padding:12px 0;border-bottom:1px dashed var(--line)}
.modlist li::before{content:counter(m,decimal-leading-zero);font:600 15px/1.8 var(--sans);color:var(--pink-ink);flex:none;width:28px}

/* ảnh bấm phóng to */
.shot{display:block;width:100%;padding:0;margin:0;border:1px solid var(--line);border-radius:18px;overflow:hidden;background:var(--surface);cursor:zoom-in;text-align:left;font:inherit;color:inherit;box-shadow:var(--shadow)}
.shot img{width:100%;height:auto}
.shot .cap{display:flex;align-items:center;gap:8px;padding:12px 16px;font-size:14px;color:var(--muted)}
dialog.lb{border:0;padding:0;background:transparent;max-width:min(96vw,1400px);max-height:94vh;overflow:visible}
dialog.lb::backdrop{background:rgba(4,18,22,.88)}
dialog.lb img{max-width:100%;max-height:88vh;height:auto;border-radius:12px}
dialog.lb .x{position:fixed;top:14px;right:14px;width:48px;height:48px;border-radius:50%;border:0;background:#fff;color:#10323d;font-size:26px;cursor:pointer}

/* hỏi đáp */
.faq{max-width:820px;margin:0 auto}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:22px 4px;font:600 18px/1.4 var(--serif);color:var(--ink);min-height:56px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";width:28px;height:28px;flex:none;border-radius:50%;background:var(--soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2300756b' stroke-width='2.5' stroke-linecap='round'%3E%3Cpath d='M12 6v12M6 12h12'/%3E%3C/svg%3E") center/14px no-repeat;transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq .a{padding:0 4px 22px;color:var(--muted)}

/* dải kêu gọi */
.cta-band{border-radius:28px;padding:64px 56px;text-align:center;background:linear-gradient(135deg,#fde8f0 0%,#e3f6f2 100%);position:relative;overflow:hidden}
.cta-band h2{font-size:clamp(28px,3.6vw,40px);max-width:760px;margin:0 auto 14px;color:#10323d}
.cta-band p{color:#4e6670;max-width:620px;margin:0 auto 28px;font-size:18px}
.cta-band .cta{display:flex;justify-content:center;flex-wrap:wrap;gap:12px}
.cta-band .btn-ghost{color:#00756b}

/* đăng ký */
.reg{display:grid;grid-template-columns:1.3fr 1fr;gap:32px;align-items:start}
.regform{display:grid;grid-template-columns:1fr 1fr;gap:18px 20px;padding:32px}
.regform .full{grid-column:1/-1}
.regform h2{font-size:24px;margin:0}
.fld{display:flex;flex-direction:column;gap:7px;margin:0;border:0;padding:0;min-width:0}
.fld label,.fld legend{font-size:14px;font-weight:600;color:var(--ink);padding:0}
.fld i{color:var(--pink-ink);font-style:normal}
.fld small{font-size:13px;color:var(--muted)}
.fld input,.fld select,.fld textarea{width:100%;min-height:50px;padding:12px 14px;border:1.5px solid var(--line);border-radius:12px;background:var(--bg);color:var(--ink);font:inherit;font-size:16px;transition:border-color .15s,box-shadow .15s}
.fld textarea{min-height:0;resize:vertical}
.fld input:focus,.fld select:focus,.fld textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(0,173,159,.16)}
.fld [aria-invalid="true"]{border-color:var(--pink-ink);box-shadow:0 0 0 4px rgba(201,47,104,.12)}
.opts{display:grid;gap:10px}
.opt{display:flex;gap:12px;align-items:center;min-height:52px;padding:0 16px;border:1.5px solid var(--line);border-radius:12px;cursor:pointer;font-size:15px;background:var(--bg)}
.opt:has(input:checked){border-color:var(--brand);background:var(--soft)}
.opt input{width:20px;height:20px;accent-color:var(--primary);flex:none;margin:0}
.agree{display:flex;gap:12px;align-items:flex-start;font-size:15px;cursor:pointer}
.agree input{width:20px;height:20px;accent-color:var(--primary);margin-top:3px;flex:none}
.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.err{margin:0;padding:12px 14px;border-radius:12px;background:var(--soft2);color:var(--pink-ink);font-size:15px;font-weight:500}
#dk-gui{min-height:54px;font-size:16px}
#dk-gui[disabled]{opacity:.7;cursor:progress}
.pay{position:sticky;top:96px;padding:28px}
.pay h3{font-size:22px}
.pay .qr{width:100%;max-width:230px;height:auto;margin:6px auto 18px;border-radius:14px;border:1px solid var(--line)}
.bank{display:grid;grid-template-columns:auto 1fr;gap:10px 14px;margin:0 0 14px;font-size:15px}
.bank dt{color:var(--muted)}
.bank dd{margin:0;display:flex;flex-wrap:wrap;gap:8px;align-items:center;word-break:break-word;font-weight:500}
.copy-btn{border:1px solid var(--line);background:var(--bg);color:var(--primary);border-radius:8px;font:600 13px/1 var(--sans);padding:7px 10px;cursor:pointer;min-height:32px}
.copy-btn.done{border-color:var(--brand)}
.ok{border-top:4px solid var(--brand);padding:36px;text-align:center;max-width:720px;margin:0 auto}
.ok .big{width:72px;height:72px;margin:0 auto 18px;border-radius:50%;background:var(--soft);color:var(--primary);display:grid;place-items:center}
.ok .big svg{width:36px;height:36px}
.ok .cta{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:18px}

/* liên hệ */
.contact{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.contact a{display:flex;gap:16px;align-items:center;padding:22px;border-radius:var(--r);border:1px solid var(--line);background:var(--surface);text-decoration:none;box-shadow:var(--shadow);transition:border-color .15s,transform .15s}
.contact a:hover{border-color:var(--brand);transform:translateY(-2px)}
.contact .ico{margin:0}
.contact b{display:block}
.contact span{font-size:14px;color:var(--muted)}

/* chân trang */
.ftr{background:#0d2a31;color:#b9ccd0;padding:72px 0 28px;margin-top:0;font-size:15px}
.ftr a{text-decoration:none;color:#b9ccd0}
.ftr a:hover{color:#fff}
.ftr .cols{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}
.ftr .logo-box{display:inline-block;background:#fff;border-radius:14px;padding:10px 14px;margin-bottom:18px}
.ftr .logo-box img{height:48px;width:auto}
.ftr h4{font:600 13px/1 var(--sans);letter-spacing:.12em;text-transform:uppercase;color:#fff;margin-bottom:18px}
.ftr ul{list-style:none;margin:0;padding:0}
.ftr li{margin:10px 0}
.ftr .soc{display:flex;gap:10px;margin-top:18px}
.ftr .soc a{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;border:1px solid rgba(255,255,255,.18)}
.ftr .soc a:hover{background:rgba(255,255,255,.08)}
.ftr .soc svg{width:18px;height:18px}
.ftr .bottom{margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.1);display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:14px}

/* thanh CTA dưới đáy trên điện thoại */
.mcta{display:none}

/* hiện dần khi cuộn tới (chỉ dưới màn đầu) */
@media (prefers-reduced-motion:no-preference){
  .js .rv{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
  .js .rv.in{opacity:1;transform:none}
}

/* máy tính bảng */
@media (max-width:1080px){
  .nav a{padding:10px 8px;font-size:14px}
  .float.f1{left:-8px}.float.f2{right:-8px}
  .ftr .cols{grid-template-columns:1fr 1fr}
}
@media (max-width:960px){
  .nav,.hdr-cta{display:none}
  .menu-btn{display:inline-flex}
  .hero .wrap,.split,.mentor,.detail,.reg,.live-band{grid-template-columns:1fr}
  .hero .wrap{gap:40px}
  .portrait{width:min(100%,380px)}
  .split.rev>:first-child{order:0}
  .g3,.g4,.steps{grid-template-columns:repeat(2,1fr)}
  .steps::before{display:none}
  .team{grid-template-columns:repeat(3,1fr)}
  .tgrid{columns:2}
  .facts{grid-template-columns:repeat(2,1fr)}
  .aside,.pay{position:static}
  .mentor .ph{max-width:380px}
  .contact{grid-template-columns:1fr}
  .live-band{padding:40px 28px}
}
/* điện thoại */
@media (max-width:620px){
  body{padding-bottom:76px}
  .wrap{padding:0 16px}
  .sec{padding:64px 0}
  .sec-tight{padding:48px 0}
  .head{margin-bottom:32px}
  .hdr .wrap{min-height:64px}
  .brand img{height:40px}
  .hero{padding:32px 0 64px}
  .hero .sub{font-size:17px}
  .hero .cta .btn{flex:1 1 100%}
  .trust{gap:20px}
  .trust b{font-size:24px}
  .float{display:none}
  .g2,.g3,.g4,.steps,.topics,.creds{grid-template-columns:1fr}
  .team{grid-template-columns:repeat(2,1fr)}
  .tgrid{columns:1}
  .card{padding:22px}
  .regform{grid-template-columns:1fr;padding:22px}
  .pay{padding:22px}
  .facts{grid-template-columns:1fr 1fr}
  .cta-band{padding:44px 22px;border-radius:22px}
  .cta-band .btn{flex:1 1 100%}
  .phero .cta .btn{flex:1 1 100%}
  .live-band{padding:32px 20px;border-radius:22px}
  .ftr .cols{grid-template-columns:1fr}
  .mcta{display:flex;gap:10px;position:fixed;left:0;right:0;bottom:0;z-index:40;padding:10px 16px calc(10px + env(safe-area-inset-bottom));background:var(--surface);border-top:1px solid var(--line);box-shadow:0 -6px 20px rgba(16,50,61,.08)}
  .mcta .btn{flex:1;min-height:48px;padding:0 10px}
}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;animation:none!important}}