/* ============================================================
   AI CHO MỌI NGƯỜI — trang lớp mở, phong cách điện ảnh tối (RV-897)
   Trang /doanh-nghiep/ vẫn dùng style.css.
   ============================================================ */
:root{
  --bg:#05080f;
  --bg-2:#0a1120;
  --bg-3:#101a2e;
  --glass:rgba(255,255,255,.055);
  --glass-b:rgba(255,255,255,.12);
  --ink:#f4f1ea;
  --ink-2:#c8ccd6;
  --ink-3:#9aa1b0;
  --gold:#e2b860;
  --gold-2:#f5d48f;
  --gold-3:#b8893a;
  --cyan:#5fd4ff;
  --radius:22px;
  --serif:"Playfair Display",Georgia,serif;
  --sans:"Be Vietnam Pro","Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:76px;background:var(--bg)}
body{font-family:var(--sans);font-variant-numeric:lining-nums;background:var(--bg);color:var(--ink);line-height:1.65;font-size:16px;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img,video{max-width:100%;height:auto;display:block}
a{color:inherit}
.wrap{width:min(1200px,100% - 32px);margin-inline:auto}
.wrap.narrow{width:min(860px,100% - 32px)}
.center{text-align:center}
.muted{color:var(--ink-2)}
.skip{position:absolute;left:-9999px;top:8px;z-index:200;background:var(--gold);color:#111;padding:10px 16px;border-radius:8px}
.skip:focus{left:8px}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid var(--gold-2);outline-offset:3px;border-radius:8px}

h2{font-family:var(--serif);font-weight:700;font-size:clamp(30px,4.6vw,54px);line-height:1.12;letter-spacing:-.01em;margin-bottom:16px}
.kicker{display:block;font-size:12px;font-weight:700;letter-spacing:.26em;text-transform:uppercase;color:var(--gold);margin-bottom:14px}
.lead{color:var(--ink-2);font-size:clamp(16px,1.6vw,19px);max-width:680px;margin:0 auto 34px}
.fine{font-size:13px;color:var(--ink-3);margin-top:22px}
.fine a{color:var(--ink-2)}
.h1-ai{background:linear-gradient(100deg,var(--gold-3),var(--gold) 35%,#fff3cf 50%,var(--gold) 65%,var(--gold-3));background-size:250% 100%;-webkit-background-clip:text;background-clip:text;color:transparent;animation:sheen 6s ease-in-out infinite}
@keyframes sheen{0%,100%{background-position:100% 0}50%{background-position:0 0}}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;font-family:var(--sans);font-weight:700;font-size:15px;letter-spacing:.02em;text-decoration:none;border-radius:999px;padding:14px 26px;border:0;cursor:pointer;transition:transform .2s,box-shadow .25s,background .25s,border-color .25s;min-height:48px;text-align:center}
.btn:hover{transform:translateY(-2px)}
.btn-gold{background:linear-gradient(120deg,var(--gold-3),var(--gold) 50%,var(--gold-2));color:#140f05;box-shadow:0 14px 40px -12px rgba(226,184,96,.75),inset 0 1px 0 rgba(255,255,255,.4)}
.btn-gold:hover{box-shadow:0 18px 50px -10px rgba(226,184,96,.95)}
.btn-ghost{background:rgba(255,255,255,.06);color:var(--ink);border:1px solid rgba(255,255,255,.28);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
.btn-ghost:hover{border-color:var(--gold);background:rgba(226,184,96,.1)}
.btn-sm{padding:10px 20px;min-height:42px;font-size:14px}
.btn-lg{padding:16px 30px;font-size:16px}

/* Header */
.site-header{position:fixed;inset:0 0 auto;z-index:60;transition:background .3s,border-color .3s,backdrop-filter .3s;border-bottom:1px solid transparent}
.site-header.scrolled{background:rgba(5,8,15,.78);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-color:rgba(255,255,255,.08)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;height:68px}
.logo{font-family:var(--serif);font-weight:700;font-size:20px;text-decoration:none;white-space:nowrap;color:var(--ink)}
.logo-ai{color:var(--gold)}
.nav{display:flex;align-items:center;gap:26px}
.nav a{text-decoration:none;font-size:14px;font-weight:500;color:var(--ink-2);transition:color .2s}
.nav a:hover,.nav a.active{color:var(--ink)}
.nav a.nav-acc{color:var(--gold-2);font-weight:600}
.burger{display:none;background:none;border:0;width:44px;height:44px;cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:5px}
.burger span{display:block;width:24px;height:2px;background:var(--ink);transition:.3s}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* Hero */
.hero{position:relative;min-height:100svh;display:flex;align-items:center;padding:110px 0 90px;overflow:hidden;isolation:isolate}
.hero-media{position:absolute;inset:0;z-index:-2;overflow:hidden}
.hero-media img{width:100%;height:100%;object-fit:cover;object-position:70% center;animation:kenburns 22s ease-out forwards;transform-origin:70% 50%}
@keyframes kenburns{from{transform:scale(1.12)}to{transform:scale(1)}}
.hero-shade{position:absolute;inset:0;z-index:-1;background:linear-gradient(90deg,rgba(5,8,15,.96) 0%,rgba(5,8,15,.86) 30%,rgba(5,8,15,.35) 58%,rgba(5,8,15,.1) 80%),linear-gradient(0deg,var(--bg) 0%,transparent 28%)}
.hero-inner{max-width:1200px}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--gold-2);padding:8px 16px;border:1px solid rgba(226,184,96,.35);border-radius:999px;background:rgba(5,8,15,.4);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);margin-bottom:24px}
.eyebrow .dot{width:8px;height:8px;border-radius:50%;background:var(--cyan);box-shadow:0 0 12px var(--cyan);animation:pulse 2s infinite}
@keyframes pulse{50%{opacity:.35}}
.hero h1{font-family:var(--serif);font-weight:800;font-size:clamp(56px,8vw,108px);line-height:.98;letter-spacing:-.02em;margin-bottom:22px;max-width:760px}
.hero-type{font-size:clamp(20px,2.4vw,28px);font-weight:600;color:#fff;min-height:1.5em;margin-bottom:14px;max-width:640px}
.type-word{color:var(--cyan);text-shadow:0 0 24px rgba(95,212,255,.45)}
.caret{display:inline-block;width:3px;height:1.05em;background:var(--cyan);margin-left:4px;vertical-align:-.15em;animation:blink 1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
.hero-desc{color:var(--ink-2);max-width:560px;font-size:17px;margin-bottom:30px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px}
.hero-facts{list-style:none;display:flex;flex-wrap:wrap;gap:12px}
.hero-facts li{display:flex;flex-direction:column;padding:12px 18px;border-radius:16px;background:var(--glass);border:1px solid var(--glass-b);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);font-size:13px;color:var(--ink-3);line-height:1.4}
.hero-facts b{color:var(--ink);font-size:15px;font-weight:600}
.scroll-cue{position:absolute;left:50%;bottom:22px;width:26px;height:42px;border:2px solid rgba(255,255,255,.35);border-radius:14px;transform:translateX(-50%)}
.scroll-cue span{position:absolute;left:50%;top:8px;width:4px;height:8px;margin-left:-2px;border-radius:2px;background:var(--gold);animation:cue 1.8s infinite}
@keyframes cue{from{transform:translateY(0);opacity:1}to{transform:translateY(14px);opacity:0}}
.js .rise{opacity:0;transform:translateY(24px);animation:rise .9s cubic-bezier(.2,.7,.2,1) forwards}
.js .rise:nth-child(2){animation-delay:.12s}.js .rise:nth-child(3){animation-delay:.3s}.js .rise:nth-child(4){animation-delay:.42s}.js .rise:nth-child(5){animation-delay:.54s}.js .rise:nth-child(6){animation-delay:.66s}
@keyframes rise{to{opacity:1;transform:none}}

/* Section rhythm */
section{position:relative}
.era,.show,.stages,.who,.take,.trainer,.reg,.faq{padding:clamp(72px,10vw,128px) 0}

/* Era */
.era{background:radial-gradient(1000px 500px at 85% 0%,rgba(95,212,255,.08),transparent 60%),var(--bg)}
.era-head h2{max-width:1000px}
.era-line{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:40px;position:relative}
.era-line::before{content:"";position:absolute;left:0;right:0;top:15px;height:1px;background:linear-gradient(90deg,transparent,rgba(226,184,96,.6),rgba(95,212,255,.6),transparent)}
.era-line li{position:relative;padding-top:42px}
.era-line li::before{content:"";position:absolute;left:0;top:8px;width:15px;height:15px;border-radius:50%;background:var(--bg);border:2px solid var(--gold);box-shadow:0 0 14px rgba(226,184,96,.6)}
.era-line time{display:block;font-family:var(--serif);font-size:26px;font-weight:700;color:var(--gold-2)}
.era-line b{display:block;font-size:18px;margin:4px 0 6px}
.era-line p{color:var(--ink-2);font-size:15px}
.era-now::before{background:var(--cyan)!important;border-color:var(--cyan)!important;box-shadow:0 0 18px var(--cyan)!important}
.era-now time{color:var(--cyan)}

/* Showcase */
.show{background:linear-gradient(180deg,var(--bg),var(--bg-2) 30%,var(--bg-2) 70%,var(--bg))}
.tabs{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;margin:0 auto 34px}
.tabs button{font:inherit;font-size:15px;font-weight:600;color:var(--ink-2);background:var(--glass);border:1px solid var(--glass-b);border-radius:999px;padding:11px 20px;min-height:46px;cursor:pointer;transition:all .25s}
.tabs button:hover{color:var(--ink);border-color:rgba(255,255,255,.3)}
.tabs button[aria-selected="true"]{color:#140f05;background:linear-gradient(120deg,var(--gold),var(--gold-2));border-color:transparent;box-shadow:0 10px 30px -10px rgba(226,184,96,.8)}
.panel{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(24px,4vw,56px);align-items:center;animation:fadein .5s ease}
.panel[hidden]{display:none}
@keyframes fadein{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.panel-copy h3{font-family:var(--serif);font-size:clamp(26px,3vw,36px);line-height:1.2;margin:14px 0 16px}
.badge{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.06em;color:var(--cyan);border:1px solid rgba(95,212,255,.4);background:rgba(95,212,255,.08);border-radius:999px;padding:5px 12px}
.prompt{background:var(--glass);border:1px solid var(--glass-b);border-left:3px solid var(--gold);border-radius:12px;padding:14px 16px;color:var(--ink);font-size:15.5px;margin-bottom:16px}
.prompt span{display:block;font-size:11px;font-weight:700;letter-spacing:.2em;text-transform:uppercase;color:var(--gold);margin-bottom:4px}
.check{list-style:none;display:grid;gap:8px}
.check li{position:relative;padding-left:28px;color:var(--ink-2);font-size:15px}
.check li::before{content:"✓";position:absolute;left:0;top:0;width:20px;height:20px;border-radius:50%;background:rgba(226,184,96,.18);color:var(--gold-2);font-size:12px;font-weight:700;display:grid;place-items:center;margin-top:2px}
.hint{font-size:13px;color:var(--ink-3);margin-top:12px}

/* Before/after slider */
.ba{--p:50%;position:relative;border-radius:var(--radius);overflow:hidden;aspect-ratio:4/5;max-width:520px;width:100%;justify-self:center;box-shadow:0 40px 90px -30px rgba(0,0,0,.9),0 0 0 1px rgba(255,255,255,.08);user-select:none;touch-action:pan-y}
.ba>img,.ba-before img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.ba-before{position:absolute;inset:0;clip-path:inset(0 calc(100% - var(--p)) 0 0)}
.ba-handle{position:absolute;top:0;bottom:0;left:var(--p);width:2px;margin-left:-1px;background:#fff;box-shadow:0 0 18px rgba(255,255,255,.7);pointer-events:none}
.ba-handle span{position:absolute;top:50%;left:50%;width:46px;height:46px;margin:-23px 0 0 -23px;border-radius:50%;background:rgba(5,8,15,.65);border:2px solid #fff;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.ba-handle span::before,.ba-handle span::after{content:"";position:absolute;top:50%;width:0;height:0;border:6px solid transparent;margin-top:-6px}
.ba-handle span::before{left:6px;border-right-color:#fff}
.ba-handle span::after{right:6px;border-left-color:#fff}
.ba-range{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:ew-resize;margin:0}
.ba-tag{position:absolute;top:14px;font-size:12px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;padding:5px 12px;border-radius:999px;background:rgba(5,8,15,.65);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);pointer-events:none}
.ba-tag-l{left:14px}.ba-tag-r{right:14px;color:var(--gold-2)}

/* Phone/video */
.phone{justify-self:center;width:min(340px,100%);padding:12px;border-radius:40px;background:linear-gradient(160deg,#2a3142,#0b0f18);box-shadow:0 40px 90px -30px rgba(0,0,0,.9),0 0 0 1px rgba(255,255,255,.1),0 0 60px -10px rgba(95,212,255,.25)}
.phone video{width:100%;aspect-ratio:3/4;object-fit:cover;border-radius:30px;background:#000}

/* Social post */
.post{justify-self:center;width:min(400px,100%);background:#fff;color:#1c1e21;border-radius:20px;overflow:hidden;box-shadow:0 40px 90px -30px rgba(0,0,0,.9)}
.post-top{display:flex;gap:10px;align-items:center;padding:14px 16px 8px}
.post-av{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,#f5a623,#e2b860);color:#fff;font-weight:800;display:grid;place-items:center;font-size:14px}
.post-top b{display:block;font-size:15px}
.post-top small{color:#65676b;font-size:12px}
.post>p{padding:4px 16px 12px;font-size:15px;line-height:1.55}
.post img{width:100%;aspect-ratio:1/1;object-fit:cover}
.post-act{display:flex;justify-content:space-around;padding:10px;color:#65676b;font-size:13px;font-weight:600;border-top:1px solid #e4e6eb}

/* Report */
.report{display:grid;gap:14px;justify-self:center;width:min(520px,100%)}
.rp-in{background:#fdf8e8;color:#3b3220;border-radius:14px;padding:16px 18px;font-family:"Courier New",monospace;font-size:14px;transform:rotate(-1.2deg);box-shadow:0 20px 40px -20px rgba(0,0,0,.8)}
.rp-out{background:#fff;color:#1a2233;border-radius:18px;padding:20px 22px;box-shadow:0 40px 90px -30px rgba(0,0,0,.9)}
.rp-lb{display:block;font-family:var(--sans);font-size:11px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:#8a6d2a;margin-bottom:6px}
.rp-out h4{font-size:18px;margin-bottom:12px}
.bars{display:flex;align-items:flex-end;gap:8px;height:140px;margin-bottom:14px;padding-top:18px}
.bars i{flex:1;position:relative;height:calc(var(--v) * 1%);max-height:100%;background:linear-gradient(180deg,#3d6fd8,#1f3f8f);border-radius:6px 6px 2px 2px;font-style:normal}
.bars i.top{background:linear-gradient(180deg,#e2b860,#b8893a)}
.bars i.miss{background:repeating-linear-gradient(45deg,#d9dde5 0 6px,#eef0f4 6px 12px);border:1px dashed #9aa1b0}
.bars em{position:absolute;top:-18px;left:0;right:0;text-align:center;font-style:normal;font-size:11px;font-weight:700;color:#1a2233}
.bars s{position:absolute;bottom:-20px;left:0;right:0;text-align:center;text-decoration:none;font-size:11px;color:#5b616e}
.rp-out ul{list-style:none;display:grid;gap:6px;margin-top:26px;font-size:14px}
.rp-out li{padding-left:16px;position:relative}
.rp-out li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:#3d6fd8}

/* Chat */
.chat{display:grid;gap:12px;justify-self:center;width:min(520px,100%)}
.chat p{padding:14px 18px;border-radius:20px;font-size:15px;max-width:92%}
.chat .me{justify-self:end;background:linear-gradient(120deg,var(--gold),var(--gold-2));color:#140f05;border-bottom-right-radius:6px}
.chat .ai{background:var(--glass);border:1px solid var(--glass-b);color:var(--ink);border-bottom-left-radius:6px}
.chat .ai-check{border-color:rgba(95,212,255,.45);background:rgba(95,212,255,.08)}

/* Stages */
.stages{background:radial-gradient(900px 500px at 15% 10%,rgba(226,184,96,.08),transparent 60%),var(--bg)}
.stage-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.stage{position:relative;padding:30px 26px;border-radius:var(--radius);background:var(--glass);border:1px solid var(--glass-b);overflow:hidden;transition:transform .35s,border-color .35s}
.stage:hover{transform:translateY(-6px);border-color:rgba(226,184,96,.5)}
.stage-hi{background:linear-gradient(160deg,rgba(226,184,96,.14),rgba(255,255,255,.04));border-color:rgba(226,184,96,.45)}
.st-no{font-family:var(--serif);font-size:56px;font-weight:800;line-height:1;color:transparent;-webkit-text-stroke:1.5px var(--gold);display:block}
.st-time{position:absolute;top:30px;right:26px;font-size:13px;font-weight:700;color:var(--cyan);border:1px solid rgba(95,212,255,.4);border-radius:999px;padding:3px 12px}
.stage h3{font-size:22px;margin:14px 0 10px}
.stage p{color:var(--ink-2);font-size:15px;margin-bottom:12px}
.stage b{color:var(--ink)}
.menu{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.menu li{font-size:13.5px;font-weight:600;padding:6px 12px;border-radius:999px;background:rgba(5,8,15,.5);border:1px solid rgba(226,184,96,.4);color:var(--gold-2)}
.st-out{color:var(--ink)!important;font-size:14.5px!important;border-top:1px dashed rgba(255,255,255,.18);padding-top:12px;margin:0!important}
.break{text-align:center;color:var(--ink-3);font-size:14px;margin-top:22px;font-style:italic}

/* Who */
.who{background:var(--bg-2)}
.who-wrap{display:grid;grid-template-columns:.85fr 1.15fr;gap:48px;align-items:start}
.who-list{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:14px}
.who-list li{padding:20px;border-radius:18px;background:var(--glass);border:1px solid var(--glass-b);color:var(--ink-2);font-size:15px}
.who-list b{display:block;color:var(--ink);font-size:17px;margin-bottom:4px}

/* Take */
.take{background:var(--bg)}
.take-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:30px}
.tk{padding:24px 22px;border-radius:20px;background:var(--glass);border:1px solid var(--glass-b)}
.tk-ic{display:grid;place-items:center;width:44px;height:44px;border-radius:12px;background:rgba(226,184,96,.15);color:var(--gold-2);font-size:20px;margin-bottom:14px}
.tk b{display:block;font-size:17px;margin-bottom:6px}
.tk p{color:var(--ink-2);font-size:14.5px}
.scope{max-width:820px;margin:26px auto 0;text-align:center;color:var(--ink-2);font-size:14.5px;padding:14px 20px;border-radius:14px;border:1px dashed rgba(255,255,255,.2)}
.scope b{color:var(--ink)}

/* Trainer */
.trainer{background:radial-gradient(700px 500px at 25% 50%,rgba(95,212,255,.1),transparent 65%),var(--bg-2);overflow:hidden}
.trainer-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:center}
.trainer-photo{position:relative;justify-self:center;max-width:460px}
.trainer-photo::before{content:"";position:absolute;inset:12% 6% 0;border-radius:50% 50% 24px 24px;background:radial-gradient(circle at 50% 35%,rgba(226,184,96,.35),rgba(95,212,255,.12) 55%,transparent 72%);filter:blur(10px);z-index:0}
.trainer-photo img{position:relative;z-index:1;-webkit-mask-image:linear-gradient(180deg,#000 72%,transparent),linear-gradient(90deg,#000 84%,transparent);-webkit-mask-composite:source-in;mask-image:linear-gradient(180deg,#000 72%,transparent),linear-gradient(90deg,#000 84%,transparent);mask-composite:intersect}
.trainer-info h2{font-size:clamp(40px,5vw,62px);margin-bottom:10px}
.cred{list-style:none;display:grid;gap:6px;margin-bottom:18px;font-weight:600;font-size:17px}
.cred li{padding-left:22px;position:relative}
.cred li::before{content:"";position:absolute;left:0;top:13px;width:12px;height:2px;background:var(--gold)}
.trainer-info>p{color:var(--ink-2)}
.learn{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:22px}
.learn a{display:flex;flex-direction:column;gap:2px;text-decoration:none;padding:14px 16px;border-radius:14px;background:var(--glass);border:1px solid var(--glass-b);transition:border-color .25s}
.learn a:hover{border-color:var(--gold)}
.learn b{color:var(--gold-2)}
.learn span{font-size:13.5px;color:var(--ink-3)}

/* Registration */
.reg{background:radial-gradient(900px 600px at 50% 0%,rgba(226,184,96,.12),transparent 60%),var(--bg)}
.reg-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:20px;margin-top:30px}
.glass{padding:30px;border-radius:24px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
.glass h3{font-size:21px;margin-bottom:14px}
.info{display:grid;grid-template-columns:max-content 1fr;gap:16px 18px}
.info dt{font-size:12px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--gold);padding-top:3px}
.info dd{font-weight:600}
.info small{display:block;font-weight:400;color:var(--ink-3);font-size:14px}
.price{font-family:var(--serif);font-size:40px;line-height:1.05;color:var(--gold-2)}
.note{margin-top:18px;padding-top:14px;border-top:1px solid rgba(255,255,255,.12);font-size:14px;color:var(--ink-3)}
.steps{list-style:none;counter-reset:s;display:grid;gap:14px}
.steps li{counter-increment:s;position:relative;padding-left:48px;color:var(--ink-2);font-size:15px}
.steps li::before{content:"0" counter(s);position:absolute;left:0;top:0;width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:rgba(226,184,96,.16);color:var(--gold-2);font-weight:700;font-size:13px}
.steps b{color:var(--ink)}
.reg-act{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}

/* FAQ */
.faq{background:var(--bg)}
details{border-bottom:1px solid rgba(255,255,255,.1);padding:6px 4px}
summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px;min-height:56px;font-weight:600;font-size:17px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-size:26px;color:var(--gold);transition:transform .3s;flex-shrink:0}
details[open] summary::after{transform:rotate(45deg)}
details p{color:var(--ink-2);padding:0 0 18px}
details p a,.faq-more a{color:var(--gold-2);font-weight:600}
.faq-more{text-align:center;margin-top:26px;color:var(--ink-2)}

/* B2B */
.b2b{padding:44px 0;background:var(--bg-3);border-top:1px solid rgba(255,255,255,.06);border-bottom:1px solid rgba(255,255,255,.06)}
.b2b-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.b2b h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:6px}
.b2b p{color:var(--ink-2);max-width:640px}

/* Final */
.final{padding:clamp(100px,14vw,170px) 0;text-align:center;overflow:hidden;isolation:isolate}
.final-bg{position:absolute;inset:0;z-index:-1;background:linear-gradient(0deg,var(--bg),rgba(5,8,15,.55) 40%,var(--bg)),url('../img/mo/hero.jpg') center/cover no-repeat;opacity:.55}
.final h2{font-size:clamp(38px,6vw,76px);font-weight:800;margin-bottom:18px}
.final p{color:var(--ink-2);margin-bottom:30px}

/* Sticky CTA (mobile) */
.sticky-cta{display:none}

/* Footer */
.site-footer{background:#030509;color:var(--ink-3);padding:28px 0 32px;font-size:14px;border-top:1px solid rgba(255,255,255,.06)}
.footer-inner{display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap}
.site-footer a{color:var(--ink-2);text-decoration:none}
.site-footer a:hover{color:var(--gold-2)}

/* Reveal */
.js .rv{opacity:0;transform:translateY(26px);transition:opacity .8s ease,transform .8s cubic-bezier(.2,.7,.2,1)}
.js .rv.in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .js .rv,.js .rise{opacity:1;transform:none}
}

/* Responsive */
@media (max-width:1024px){
  .era-line{grid-template-columns:1fr 1fr;row-gap:30px}
  .era-line::before{display:none}
  .take-grid{grid-template-columns:1fr 1fr}
  .stage-grid{grid-template-columns:1fr}
}
@media (max-width:960px){
  .nav{position:fixed;top:68px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;background:rgba(5,8,15,.97);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);padding:8px 16px 18px;border-bottom:1px solid rgba(255,255,255,.1);transform:translateY(-130%);transition:transform .35s;z-index:-1}
  .nav.open{transform:none}
  .nav a{padding:14px 4px;border-bottom:1px solid rgba(255,255,255,.08);font-size:16px}
  .nav a.nav-acc{border-bottom:0}
  .burger{display:flex}
  .header-cta{display:none}
  .site-header{background:rgba(5,8,15,.6);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
  .panel{grid-template-columns:1fr}
  .panel-copy{order:-1}
  .who-wrap,.trainer-wrap,.reg-grid{grid-template-columns:1fr}
  .trainer-photo{max-width:360px}
}
@media (max-width:760px){
  .hero{min-height:auto;padding:0 0 64px;display:block}
  .hero-media{bottom:auto;height:min(62vh,560px)}
  .hero-media img{object-position:50% 22%}
  .hero-shade{bottom:auto;height:min(62vh,560px);background:linear-gradient(0deg,var(--bg) 0%,rgba(5,8,15,.55) 30%,rgba(5,8,15,0) 60%),linear-gradient(180deg,rgba(5,8,15,.6),transparent 22%)}
  .hero-inner{padding-top:calc(min(62vh,560px) - 120px)}
  .eyebrow{font-size:11.5px;letter-spacing:.08em;padding:7px 12px}
  .hero-type{min-height:2.7em}
  .hero h1{font-size:clamp(52px,15vw,72px)}
  .hero-desc{font-size:16px}
  .hero-actions .btn{width:100%}
  .hero-facts li{flex:1 1 calc(50% - 12px)}
  .scroll-cue{display:none}
  .who-list{grid-template-columns:1fr}
  .learn{grid-template-columns:1fr}
  .glass{padding:24px 20px}
  .info{grid-template-columns:1fr;gap:2px}
  .info dd{margin-bottom:12px}
  .reg-act .btn,.b2b .btn{width:100%}
  .tabs{flex-wrap:nowrap;overflow-x:auto;justify-content:flex-start;margin-inline:-16px;padding:4px 16px 8px;scrollbar-width:none;-webkit-mask-image:linear-gradient(90deg,transparent,#000 16px,#000 calc(100% - 24px),transparent);mask-image:linear-gradient(90deg,transparent,#000 16px,#000 calc(100% - 24px),transparent)}
  .tabs::-webkit-scrollbar{display:none}
  .tabs button{flex-shrink:0}
  .br-d{display:none}
  .sticky-cta{display:flex;position:fixed;left:16px;right:16px;bottom:14px;z-index:55;justify-content:center;align-items:center;min-height:52px;border-radius:999px;font-weight:700;text-decoration:none;color:#140f05;background:linear-gradient(120deg,var(--gold-3),var(--gold) 50%,var(--gold-2));box-shadow:0 14px 40px -10px rgba(0,0,0,.9);transform:translateY(140%);transition:transform .35s}
  .sticky-cta.show{transform:none}
  .site-footer{padding-bottom:90px}
}
@media (max-width:420px){
  .era-line{grid-template-columns:1fr}
  .take-grid{grid-template-columns:1fr}
  .logo{font-size:18px}
  .hero-facts li{flex:1 1 100%}
}
/* 22/10/2026: dòng ghi nhận lớp tại chỗ đã kết thúc (chữ thường, không phải nút) */
.da-xong{display:flex;align-items:flex-start;gap:10px;margin:-6px 0 26px;max-width:640px;color:#C9CFDA;font-size:16px;line-height:1.5}
.da-xong svg{flex:0 0 18px;width:18px;height:18px;margin-top:4px;color:#FFD678}
@media (max-width:760px){.da-xong{font-size:14.5px;margin-bottom:20px}}