/* Đường dẫn: landing/trang-chu.css — giao diện trang giới thiệu (tách từ index.html) */
/* Bố cục: mobile-first một cột; desktop = hero lệch (chữ trái, điện thoại phải), tính năng chia 3 trụ cột
   (Học viên · Học phí & tiền · Nhân sự & vận hành), bảng giá dạng sổ (từng dòng gói) bên cạnh máy tính gói. */
:root{
  --bg:#FBFDFC;--surface:#FFFFFF;--band:#F0FDFA;--ink:#0F172A;--muted:#475569;--line:#D7E5E2;
  --brand:#0F766E;--brand-dark:#115E59;--brand-tint:#F0FDFA;--on-brand:#FFFFFF;--mark:#0F766E;
  --accent:#F59E0B;--accent-strong:#B45309;--accent-tint:#FEF3C7;--on-accent:#0F172A;
  --deep:#115E59;--on-deep:#ECFDF5;--on-deep-muted:#B4DED7;--on-deep-accent:#FCD34D;
  --deep-line:rgba(255,255,255,.2);--deep-fill:rgba(255,255,255,.08);
  --ok:#047857;--ok-bg:#D1FAE5;--no:#B91C1C;--no-bg:#FEE2E2;--off:#64748B;--off-bg:#EEF2F4;--err:#B91C1C;
  --phone:#0F172A;--qr-bg:#FFFFFF;--qr-fg:#0F172A;--grid:rgba(15,118,110,.08);
  --shadow:0 18px 40px -22px rgba(15,23,42,.38);
  --font:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Consolas,monospace;
  --fs-display:clamp(2.125rem,1.3rem + 3.5vw,3.5rem);--fs-h2:clamp(1.625rem,1.2rem + 1.6vw,2.375rem);
  --fs-lead:clamp(1.0625rem,1rem + .3vw,1.1875rem);--fs-sm:.9375rem;--fs-xs:.8125rem;--r:14px;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#0A1413;--surface:#10201E;--band:#0D1B1A;--ink:#E5EFED;--muted:#9DB2AE;--line:#22403C;
  --brand:#2DD4BF;--brand-dark:#5EEAD4;--brand-tint:#0F2C29;--on-brand:#042F2C;--accent-strong:#FBBF24;--accent-tint:#33270B;
  --deep:#0F2C29;--on-deep:#E5EFED;--on-deep-muted:#9DC9C2;--ok:#6EE7B7;--ok-bg:#0B3B2E;--no:#FCA5A5;--no-bg:#3B1416;
  --off:#94A3B8;--off-bg:#1C2A2E;--err:#FCA5A5;--phone:#020617;--grid:rgba(45,212,191,.07);--shadow:0 18px 40px -22px rgba(0,0,0,.8);color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0A1413;--surface:#10201E;--band:#0D1B1A;--ink:#E5EFED;--muted:#9DB2AE;--line:#22403C;
  --brand:#2DD4BF;--brand-dark:#5EEAD4;--brand-tint:#0F2C29;--on-brand:#042F2C;--accent-strong:#FBBF24;--accent-tint:#33270B;
  --deep:#0F2C29;--on-deep:#E5EFED;--on-deep-muted:#9DC9C2;--ok:#6EE7B7;--ok-bg:#0B3B2E;--no:#FCA5A5;--no-bg:#3B1416;
  --off:#94A3B8;--off-bg:#1C2A2E;--err:#FCA5A5;--phone:#020617;--grid:rgba(45,212,191,.07);--shadow:0 18px 40px -22px rgba(0,0,0,.8);color-scheme:dark}

/* ---------- Nền tảng ---------- */
*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
body{margin:0;background:var(--bg);color:var(--ink);font:400 1rem/1.65 var(--font);-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:30;background:var(--bg)}
h1,h2,h3,p{margin:0}
h1,h2,h3{line-height:1.22;letter-spacing:-.015em;text-wrap:balance}
a{color:var(--brand)}
:focus-visible{outline:3px solid var(--brand);outline-offset:3px;border-radius:6px}
.wrap{max-width:1160px;margin-inline:auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
@media (min-width:768px){.wrap{padding-left:max(32px,env(safe-area-inset-left,0px));padding-right:max(32px,env(safe-area-inset-right,0px))}}
.sr-only{position:absolute;width:1px;height:1px;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip{position:absolute;left:12px;top:-80px;z-index:40;background:var(--ink);color:var(--bg);padding:10px 14px;border-radius:8px}.skip:focus{top:12px}
.ic{width:20px;height:20px;flex:none;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.ic-box{width:40px;height:40px;border-radius:10px;display:grid;place-items:center;background:var(--brand-tint);color:var(--brand);flex:none}
.mono{font-family:var(--mono);font-weight:500}
section[id]{scroll-margin-top:72px}
.sec{padding-block:clamp(56px,8vw,104px)}
.band{background:var(--band)}
.eyebrow{font-size:var(--fs-xs);font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--brand)}
.sec-head{display:grid;gap:12px;max-width:46rem;margin-bottom:clamp(32px,5vw,56px)}
.sec-head h2{font-size:var(--fs-h2);font-weight:800}
.sec-head p{color:var(--muted);font-size:var(--fs-lead)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:12px 22px;border-radius:12px;border:1.5px solid transparent;font:600 1rem/1.2 var(--font);text-decoration:none;cursor:pointer;transition:background-color .2s,border-color .2s,color .2s}
.btn-primary{background:var(--brand);color:var(--on-brand)}.btn-primary:hover{background:var(--brand-dark)}
.btn-ghost{background:var(--surface);color:var(--ink);border-color:var(--line)}.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn:disabled{opacity:.65;cursor:progress}

/* ---------- Header ---------- */
.hdr{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:var(--bg);background:color-mix(in srgb,var(--bg) 90%,transparent);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.hdr .wrap{display:flex;align-items:center;gap:12px;min-height:64px}
.logo{display:inline-flex;align-items:center;gap:9px;min-height:44px;color:var(--ink);text-decoration:none;font-weight:800;font-size:1.3125rem;letter-spacing:-.03em}
.logo svg{width:34px;height:34px}.logo b{color:var(--brand);font-weight:800}
.nav{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav a:not(.btn){display:inline-flex;align-items:center;min-height:44px;padding:0 12px;border-radius:8px;color:var(--ink);text-decoration:none;font-weight:500;font-size:var(--fs-sm)}.nav a:not(.btn):hover{background:var(--brand-tint);color:var(--brand)}
.nav .btn{min-height:44px;padding:8px 16px;font-size:var(--fs-sm);margin-left:6px;gap:.3em}
.nav .wide,.nav a.wide{display:none}
@media (min-width:820px){.nav .wide,.nav a.wide{display:inline-flex}}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding-block:clamp(40px,7vw,88px) clamp(56px,8vw,96px)}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:32px 32px;-webkit-mask-image:radial-gradient(ellipse at 75% 35%,#000 25%,transparent 72%);mask-image:radial-gradient(ellipse at 75% 35%,#000 25%,transparent 72%)}
.hero .wrap{position:relative;display:grid;gap:40px;align-items:center}
@media (min-width:960px){.hero .wrap{grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:48px}}
.hero-copy{display:grid;gap:24px;min-width:0}
.hero h1{font-size:var(--fs-display);font-weight:800;letter-spacing:-.03em;line-height:1.16}
.hero h1 em{font-style:normal;color:var(--brand);background:linear-gradient(var(--accent),var(--accent)) 0 92%/100% .12em no-repeat;padding-bottom:.04em}
.lead{font-size:var(--fs-lead);color:var(--muted);max-width:36rem}
.cta-row{display:flex;flex-wrap:wrap;gap:12px}
.checks{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:8px 20px;color:var(--muted);font-size:var(--fs-sm)}
.checks li{display:flex;align-items:center;gap:8px}.checks .ic{color:var(--brand);width:18px;height:18px}
.price-hint{font-size:var(--fs-sm);color:var(--muted)}.price-hint b{color:var(--ink)}
/* Minh hoạ điện thoại */
.visual{position:relative;justify-self:center;width:min(100%,420px);padding-block:76px 52px}
.phone{width:min(272px,72vw);margin-inline:auto;border-radius:40px;background:var(--phone);padding:10px;box-shadow:var(--shadow)}
.screen{border-radius:31px;background:var(--surface);display:grid;gap:10px;padding:12px 12px 14px;font-size:.8125rem}
.ph-bar{display:flex;justify-content:space-between;align-items:center;padding:0 8px;font:500 .75rem var(--mono);color:var(--muted)}
.ph-bar i{width:64px;height:18px;border-radius:12px;background:var(--phone)}
.ph-head{background:var(--brand);color:var(--on-brand);border-radius:16px;padding:12px 14px;display:grid;gap:1px}
.ph-head small{font-size:.75rem;opacity:.85}.ph-head b{font-size:1.0625rem}.ph-head span{font:500 .75rem var(--mono);opacity:.9}
.ph-list{list-style:none;margin:0;padding:0;display:grid;gap:6px}
.ph-list li{display:flex;align-items:center;gap:9px;padding:7px 8px;border:1px solid var(--line);border-radius:12px;font-weight:500}
.av{width:26px;height:26px;border-radius:50%;display:grid;place-items:center;background:var(--brand-tint);color:var(--brand);font-size:.6875rem;font-weight:700;flex:none}
.st{margin-left:auto;padding:2px 8px;border-radius:999px;font-size:.6875rem;font-weight:600;white-space:nowrap}
.st-ok{background:var(--ok-bg);color:var(--ok)}.st-no{background:var(--no-bg);color:var(--no)}.st-off{background:var(--off-bg);color:var(--off)}
.ph-list li.off{color:var(--off);border-style:dashed}.ph-list li.off .av{background:var(--off-bg);color:var(--off)}
.ph-note{display:flex;gap:6px;align-items:center;color:var(--muted);font-size:.6875rem;padding:0 4px}.ph-note .ic{width:14px;height:14px}
.ph-btn{background:var(--ink);color:var(--bg);border-radius:12px;padding:10px;text-align:center;font-weight:600}
.float{position:absolute;display:flex;gap:10px;align-items:flex-start;max-width:min(232px,64%);padding:10px 12px;background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);font-size:.8125rem;line-height:1.45}
.float b{display:block}.float .ic-box{width:32px;height:32px;border-radius:9px}.float .ic{width:18px;height:18px}.float .t{display:block;font:500 .6875rem var(--mono);color:var(--muted)}
.f1{top:0;left:0}.f2{bottom:0;right:0}.f2 .ic-box{background:var(--accent-tint);color:var(--accent-strong)}
@media (prefers-reduced-motion:no-preference){.f1{animation:nhay .7s .35s both cubic-bezier(.2,.8,.2,1)}.f2{animation:nhay .7s .8s both cubic-bezier(.2,.8,.2,1)}}
@keyframes nhay{from{transform:translateY(12px) scale(.96)}}

/* ---------- Nỗi đau ---------- */
.pains{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.pain{display:grid;gap:8px 40px;padding-block:20px;border-bottom:1px solid var(--line)}
.pain>div{display:flex;gap:12px;align-items:flex-start;min-width:0}
.pain .before{font-weight:600}.pain .before .ic{color:var(--no);margin-top:3px}
.pain .after{color:var(--muted)}.pain .after .ic{color:var(--brand);margin-top:3px}
.pain-cols{display:none}
@media (min-width:768px){.pain,.pain-cols{grid-template-columns:1fr 1fr}.pain-cols{display:grid;gap:40px;padding-bottom:12px}}

/* ---------- Tính năng ---------- */
.pillar{display:grid;gap:24px;padding-block:32px;border-top:1px solid var(--line)}
.pillar-head{display:flex;flex-wrap:wrap;align-items:center;gap:12px 16px}
.pillar-head h3{font-size:1.5rem;font-weight:800}.pillar-head p{color:var(--muted);flex-basis:100%;max-width:40rem}
.groups{display:grid;gap:32px}
@media (min-width:700px){.groups{grid-template-columns:repeat(2,minmax(0,1fr))}.groups>:last-child:nth-child(odd){grid-column:1/-1}}
@media (min-width:1024px){.groups{grid-template-columns:repeat(3,minmax(0,1fr))}.groups>:last-child:nth-child(odd){grid-column:auto}}
.group{display:grid;gap:12px;align-content:start;min-width:0}
.group h4{font-size:1.0625rem;font-weight:700;margin:0;display:flex;align-items:center;gap:12px}
.group ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.group li{display:flex;gap:10px;color:var(--muted);font-size:var(--fs-sm)}
.group li::before{content:"";flex:none;width:6px;height:6px;margin-top:.62em;border-radius:2px;background:var(--brand)}
.msg{align-self:start;justify-self:start;max-width:360px;display:grid;gap:12px;padding:16px;background:var(--surface);border:1px solid var(--line);border-radius:18px 18px 18px 6px;box-shadow:var(--shadow);font-size:var(--fs-sm)}
.msg-meta{font:500 .75rem var(--mono);color:var(--muted)}
.qr-row{display:flex;gap:14px;align-items:center}
.qr{width:104px;height:104px;flex:none;background:var(--qr-bg);border:1px solid var(--line);border-radius:10px;padding:4px}.qr path{fill:var(--qr-fg)}
.qr-cap{display:grid;gap:2px;font-size:var(--fs-xs);color:var(--muted)}.qr-cap .mono{color:var(--ink);font-size:.8125rem}

/* ---------- Tự động ---------- */
.auto-grid{display:grid;gap:40px}
@media (min-width:960px){.auto-grid{grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:56px}}
.timeline{list-style:none;margin:0 0 0 7px;padding:0 0 0 26px;border-left:2px solid var(--line);display:grid;gap:26px}
.tl{position:relative;display:grid;gap:4px}
.tl::before{content:"";position:absolute;left:-34px;top:4px;width:14px;height:14px;border-radius:50%;background:var(--surface);border:3px solid var(--brand)}
.tl-when{font:500 var(--fs-xs) var(--mono);color:var(--accent-strong)}.tl h3{font-size:1.0625rem;font-weight:700}.tl p{color:var(--muted);font-size:var(--fs-sm);max-width:34rem}
.safe{display:grid;gap:16px;align-content:start}
.safe-card{display:grid;gap:10px;padding:24px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r)}
.safe-card h3{font-size:1.125rem;font-weight:700}.safe-card p{color:var(--muted);font-size:var(--fs-sm)}

/* ---------- Bảo mật ---------- */
.deep{background:var(--deep);color:var(--on-deep)}
.deep .eyebrow{color:var(--on-deep-accent)}.deep .sec-head p,.deep p{color:var(--on-deep-muted)}.deep h3{color:var(--on-deep)}
.sec-grid{display:grid;gap:48px}
@media (min-width:960px){.sec-grid{grid-template-columns:minmax(0,5fr) minmax(0,6fr);gap:64px}}
.iso{display:grid;gap:12px}
.iso-row{display:grid;grid-template-columns:minmax(0,1fr) 36px auto;align-items:center;gap:10px}
.iso-dom{font:500 .8125rem var(--mono);padding:8px 10px;border:1px solid var(--deep-line);background:var(--deep-fill);border-radius:8px;overflow-wrap:anywhere;color:var(--on-deep)}
.iso-line{height:0;border-top:2px dashed var(--deep-line)}
.iso-db{display:flex;align-items:center;gap:8px;font-size:var(--fs-xs);font-weight:600;color:var(--on-deep)}.iso-db .ic{width:28px;height:28px;color:var(--on-deep-accent)}
.iso-cap{font-size:var(--fs-xs);margin-top:4px}
.sec-list{list-style:none;margin:0;padding:0;display:grid;gap:22px}
.sec-list li{display:grid;grid-template-columns:40px minmax(0,1fr);gap:2px 14px}
.sec-list .ic-box{grid-row:span 2;background:var(--deep-fill);color:var(--on-deep-accent)}.sec-list h3{font-size:1.0625rem;font-weight:700}.sec-list p{font-size:var(--fs-sm)}

/* ---------- Bảng giá ---------- */
.seg{display:inline-flex;gap:4px;padding:4px;border:1px solid var(--line);border-radius:14px;background:var(--surface);margin-bottom:28px;max-width:100%}
.seg button{min-height:44px;padding:8px 16px;border:0;border-radius:10px;background:transparent;color:var(--muted);font:600 var(--fs-sm) var(--font);cursor:pointer}
.seg button[aria-pressed="true"]{background:var(--brand);color:var(--on-brand)}.seg small{font-weight:500;opacity:.9}
.price-grid{display:grid;gap:32px}
@media (min-width:960px){.price-grid{grid-template-columns:minmax(0,5fr) minmax(0,7fr);align-items:start}.calc{position:sticky;top:88px}}
.calc{display:grid;gap:18px;padding:clamp(20px,3vw,28px);background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)}
.calc h3{font-size:1.25rem;font-weight:800}
.calc-fields{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:12px}
.field{display:grid;gap:6px;align-content:start;min-width:0}
.field label{font-weight:600;font-size:var(--fs-sm)}
.hint{font-size:var(--fs-xs);color:var(--muted)}
input,textarea{width:100%;min-height:48px;padding:10px 12px;font:400 1rem/1.4 var(--font);color:var(--ink);background:var(--bg);border:1.5px solid var(--line);border-radius:10px}
textarea{min-height:104px;resize:vertical}
input:focus-visible,textarea:focus-visible{outline:3px solid var(--brand);outline-offset:1px;border-color:var(--brand)}
input[aria-invalid="true"],textarea[aria-invalid="true"]{border-color:var(--err)}
.result{display:grid;gap:6px;padding-top:18px;border-top:1px dashed var(--line)}
.r-name{font-size:1.875rem;font-weight:800;letter-spacing:-.02em;line-height:1.2}
.r-price{font-size:1.125rem;font-weight:700;font-variant-numeric:tabular-nums}.r-price span{font-weight:500;color:var(--muted);font-size:var(--fs-sm)}
.r-day{justify-self:start;padding:3px 10px;border-radius:999px;background:var(--accent-tint);color:var(--accent-strong);font-weight:700;font-size:var(--fs-sm)}
.r-note{font-size:var(--fs-xs);color:var(--muted)}
.r-tip{padding:10px 12px;border-radius:10px;background:var(--brand-tint);color:var(--ink)}
.all-in{display:flex;gap:10px;align-items:center;font-weight:600;margin-bottom:14px}.all-in .ic{color:var(--brand)}
.tiers{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.tier{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:2px 16px;align-items:center;padding:16px 18px;background:var(--surface);border:1.5px solid var(--line);border-radius:var(--r);transition:border-color .2s,background-color .2s}
.tier-top{display:flex;flex-wrap:wrap;align-items:center;gap:6px 10px}
.tier h3{font-size:1.125rem;font-weight:700}
.tier-price{grid-row:span 2;display:grid;justify-items:end;text-align:right}
.tier-price b{font-size:1.25rem;font-weight:800;font-variant-numeric:tabular-nums;white-space:nowrap}.tier-price span{font-size:var(--fs-xs);color:var(--muted)}
.tier-limit{color:var(--muted);font-size:var(--fs-sm)}
.tier-sub{grid-column:1/-1;font-size:var(--fs-xs);color:var(--muted);font-variant-numeric:tabular-nums}
.tier.is-match{border-color:var(--brand);background:var(--brand-tint)}
.chip{display:inline-flex;padding:2px 10px;border-radius:999px;background:var(--accent);color:var(--on-accent);font-size:.75rem;font-weight:700}
.notes{list-style:none;margin:16px 0 0;padding:0;display:grid;gap:8px;font-size:var(--fs-sm);color:var(--muted)}
.notes li{display:flex;gap:10px}.notes .ic{width:18px;height:18px;margin-top:3px;color:var(--brand)}
.offers{display:grid;gap:16px;margin-top:clamp(48px,6vw,72px)}
@media (min-width:768px){.offers{grid-template-columns:repeat(3,minmax(0,1fr))}}
.offer{display:grid;gap:8px;align-content:start;padding:22px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r)}
.offer h3{font-size:1.0625rem;font-weight:700}.offer p{color:var(--muted);font-size:var(--fs-sm)}
.founding{grid-column:1/-1;background:var(--deep);border-color:var(--deep);color:var(--on-deep);padding:clamp(22px,4vw,36px);gap:12px}
@media (min-width:768px){.founding{grid-template-columns:minmax(0,1.3fr) minmax(0,1fr) auto;align-items:center;gap:12px 32px}}
.founding .eyebrow{color:var(--on-deep-accent)}.founding h3{font-size:clamp(1.375rem,1.1rem + 1vw,1.75rem);font-weight:800;color:var(--on-deep)}.founding p{color:var(--on-deep-muted)}
.founding .btn{background:var(--accent);color:var(--on-accent);justify-self:start}.founding .btn:hover{background:var(--on-deep-accent)}
.addons{margin-top:48px;max-width:56rem}
.addons h3{font-size:1.25rem;font-weight:800;margin-bottom:12px}.addons dl{margin:0;border-top:1px solid var(--line)}
.addons dl>div{display:grid;gap:2px 32px;padding-block:14px;border-bottom:1px solid var(--line)}
@media (min-width:768px){.addons dl>div{grid-template-columns:minmax(0,1fr) minmax(0,1.4fr)}}
.addons dt{font-weight:600}.addons dd{margin:0;color:var(--muted)}.addons dd b{color:var(--ink);font-variant-numeric:tabular-nums}

/* ---------- Các bước, hỏi đáp ---------- */
.steps{list-style:none;margin:0;padding:0;display:grid;gap:28px}
@media (min-width:640px){.steps{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.steps{grid-template-columns:repeat(4,minmax(0,1fr))}}
.step{display:grid;gap:8px;align-content:start;padding-top:18px;border-top:3px solid var(--line)}
.step:first-child{border-top-color:var(--brand)}
.step-num{font:500 var(--fs-xs) var(--mono);color:var(--brand)}.step h3{font-size:1.125rem;font-weight:700}.step p{color:var(--muted);font-size:var(--fs-sm)}
.faq-grid{display:grid;gap:24px}
@media (min-width:960px){.faq-grid{grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:56px}.faq-grid .sec-head{margin:0}}
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{display:flex;justify-content:space-between;align-items:center;gap:16px;min-height:44px;padding-block:16px;cursor:pointer;list-style:none;font-weight:600;font-size:1.0625rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";flex:none;font:400 1.625rem/1 var(--font);color:var(--brand);transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{padding-bottom:18px;color:var(--muted);max-width:44rem}

/* ---------- Đăng ký ---------- */
.lead-grid{display:grid;gap:32px}
@media (min-width:960px){.lead-grid{grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:48px;align-items:start}}
.form{position:relative;display:grid;gap:18px;padding:clamp(20px,3.5vw,36px);background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)}
.form-row{display:grid;gap:18px}
@media (min-width:640px){.form-row{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}}
.req{color:var(--err)}
.err{font-size:var(--fs-xs);font-weight:500;color:var(--err)}
.counter{font-size:var(--fs-xs);color:var(--muted);text-align:right;font-variant-numeric:tabular-nums}
.hp{position:absolute;left:-10000px;top:auto;width:1px;height:1px;overflow:hidden}
.form-status{padding:14px 16px;border-radius:12px;font-size:var(--fs-sm)}
.form-status a{color:inherit;font-weight:700}
.is-ok{background:var(--ok-bg);color:var(--ok)}.is-err{background:var(--no-bg);color:var(--no)}
.privacy{font-size:var(--fs-xs);color:var(--muted)}
.aside{display:grid;gap:24px;align-content:start}
.aside .checks{display:grid;gap:12px;font-size:1rem;color:var(--ink)}
.contact{display:grid;gap:12px;padding:22px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r)}
.contact h3{font-size:1.125rem;font-weight:700}.contact p{color:var(--muted);font-size:var(--fs-sm)}
.c-item{display:flex;align-items:center;gap:12px;min-height:44px;color:var(--ink);text-decoration:none;font-weight:600;overflow-wrap:anywhere}
.c-item:hover span{color:var(--brand);text-decoration:underline}

/* ---------- Footer ---------- */
.ftr{border-top:1px solid var(--line);padding-block:44px 28px;font-size:var(--fs-sm);color:var(--muted)}
.ftr .wrap{display:grid;gap:28px}
@media (min-width:768px){.ftr .wrap{grid-template-columns:minmax(0,1.4fr) minmax(0,1fr) minmax(0,1fr)}}
.ftr h3{font-size:var(--fs-xs);font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--ink);margin-bottom:10px}
.ftr ul{list-style:none;margin:0;padding:0;display:grid;gap:2px}
.ftr a{display:inline-flex;align-items:center;min-height:32px;color:var(--muted);text-decoration:none;overflow-wrap:anywhere}.ftr a:hover{color:var(--ink);text-decoration:underline}
.ftr .about{display:grid;gap:12px;align-content:start;max-width:24rem}
.ftr .bottom{grid-column:1/-1;display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 24px;padding-top:20px;border-top:1px solid var(--line)}