/* Nền chung cho mọi trang (trang con không có khung mặc định) */
:root{padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
body{margin:0}
[hidden]{display:none!important}

/* Layout: website trung tâm giáo dục phổ thông, màu thương hiệu Mộc: xanh lá (người, trang sách) và xanh dương (gáy sách) — topbar liên hệ, hero ảnh thật, các khối nội dung xen kẽ nền trắng / xanh nhạt, dải số liệu xanh đậm */
:root{
  --bg:#ffffff; --bg-2:#f2f8f1; --ink:#13201a; --muted:#56675c;
  --brand:#0b8f00; --brand-bright:#0ec400; --brand-deep:#0a3f86; --brand-ink:#ffffff; --brand-soft:#e3f6df;
  --accent:#0078f0; --accent-soft:#e2effd;
  --card:#ffffff; --border:#dfe9dc; --shadow:0 14px 34px -16px rgba(10,60,40,.26);
  --f-display:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-body:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",sans-serif;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#0e1410; --bg-2:#141c16; --ink:#e7f1e9; --muted:#9db1a2;
  --brand:#3fd635; --brand-bright:#3fd635; --brand-deep:#0b2a55; --brand-ink:#051404; --brand-soft:#16321a;
  --accent:#5aa8ff; --accent-soft:#11284a;
  --card:#162019; --border:#25332a; --shadow:0 14px 34px -16px rgba(0,0,0,.65); color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0e1410; --bg-2:#141c16; --ink:#e7f1e9; --muted:#9db1a2;
  --brand:#3fd635; --brand-bright:#3fd635; --brand-deep:#0b2a55; --brand-ink:#051404; --brand-soft:#16321a;
  --accent:#5aa8ff; --accent-soft:#11284a;
  --card:#162019; --border:#25332a; --shadow:0 14px 34px -16px rgba(0,0,0,.65); color-scheme:dark}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
body{background:var(--bg);color:var(--ink);font:16px/1.65 var(--f-body);-webkit-font-smoothing:antialiased}
.wrap{max-width:1180px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
h1,h2,h3{font-family:var(--f-display);line-height:1.2;text-wrap:balance;margin:0;letter-spacing:-.01em}
.nw{white-space:nowrap}
p,li,summary,figcaption,small,.lead{text-wrap:pretty}
@media (max-width:370px){.nw{white-space:normal}}
h2{font-size:clamp(1.7rem,3.2vw,2.4rem);font-weight:800}
h3{font-size:1.15rem;font-weight:700}
p{margin:0}
a{color:var(--brand)}
img{display:block;max-width:100%}
:focus-visible{outline:3px solid var(--brand);outline-offset:3px;border-radius:8px}
.eyebrow{display:inline-block;justify-self:start;font-size:.78rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--brand);background:var(--brand-soft);padding:6px 12px;border-radius:999px}
.lead{color:var(--muted);max-width:62ch;font-size:1.05rem}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5em;font:600 1rem var(--f-body);padding:.85em 1.5em;border-radius:12px;border:1.5px solid transparent;text-decoration:none;cursor:pointer;transition:transform .15s,box-shadow .15s}
.btn:hover{transform:translateY(-1px);box-shadow:var(--shadow)}
.btn-main{background:var(--brand);color:var(--brand-ink)}
.btn-accent{background:#ffffff;color:#0a3f86}
.btn-ghost{border-color:var(--border);color:var(--ink);background:var(--card)}

/* Topbar + header */
.topbar{background:var(--brand-deep);color:#e6f6ee;font-size:.85rem}
.topbar .wrap{display:flex;justify-content:space-between;gap:12px;padding-block:8px;flex-wrap:wrap}
.topbar span{white-space:nowrap}
.topbar b{font-weight:600}
@media (max-width:640px){.topbar .hide-sm{display:none}}
header{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:color-mix(in srgb,var(--bg) 92%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:21;background:var(--bg)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-block:12px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}
.logo-mark{width:auto;height:46px}

.foot-logo{background:#fff;border-radius:16px;padding:10px;width:150px;margin-bottom:14px}
.logo-text{display:grid;gap:3px;min-width:0}
.logo b{font:800 1.3rem/1.05 var(--f-display);display:block;letter-spacing:.01em;white-space:nowrap;color:var(--brand)}
.logo small{display:block;color:var(--muted);font-size:.78rem;font-weight:500;line-height:1.2;white-space:nowrap;text-wrap:nowrap}
@media (max-width:420px){.logo b{font-size:1.1rem}.logo small{font-size:.7rem}.logo-mark{height:40px}}
.nav-links{display:flex;gap:24px;align-items:center}
.nav-links a{color:var(--ink);text-decoration:none;font-weight:500;font-size:.95rem}
.nav-links a:hover{color:var(--brand)}
.nav-links .btn{padding:.6em 1.1em;color:var(--brand-ink)}


/* Hero */
.hero{background:linear-gradient(160deg,var(--brand-soft),var(--accent-soft) 45%,var(--bg) 85%)}
.hero-grid{display:grid;grid-template-columns:1fr 1.05fr;gap:48px;align-items:center;padding-block:56px}
.hero-copy{display:grid;gap:18px}
.hero h1{font-size:clamp(1.75rem,4.6vw,3.4rem);font-weight:800}
.hero h1 em{font-style:normal;color:var(--brand)}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:4px}
.checks{display:flex;flex-wrap:wrap;gap:8px 20px;color:var(--muted);font-size:.92rem}
.checks span::before{content:"✓ ";color:var(--brand);font-weight:700}
.hero-photo{position:relative}
.hero-photo img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:24px;box-shadow:var(--shadow)}
.badge{position:absolute;background:var(--card);border:1px solid var(--border);border-radius:16px;padding:12px 16px;box-shadow:var(--shadow);display:flex;align-items:center;gap:12px}
.badge b{font-size:1.35rem;font-weight:800;font-variant-numeric:tabular-nums;line-height:1}
.badge small{display:block;color:var(--muted);font-size:.8rem}
.badge .ico{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;font-weight:800}
.badge-1{left:-18px;bottom:28px}.badge-1 .ico{background:var(--accent-soft);color:var(--accent)}
.badge-2{right:-14px;top:24px}.badge-2 .ico{background:var(--brand-soft);color:var(--brand)}
@media (max-width:900px){.hero-grid{grid-template-columns:1fr;padding-block:36px}.badge-1{left:10px}.badge-2{right:10px}}

section{padding-block:84px}
.sec-head{display:grid;gap:12px;margin-bottom:44px}
.sec-head.center{justify-items:center;text-align:center}
.sec-head.center .eyebrow{justify-self:center}
.alt{background:var(--bg-2)}

/* Giới thiệu */
.about{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center}
.about-photo img{width:100%;aspect-ratio:3/2;object-fit:cover;border-radius:24px}
.about-copy{display:grid;gap:16px}
.mv{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:6px}
.mv div{background:var(--bg-2);border-radius:16px;padding:16px 18px;display:grid;gap:4px}
.mv b{color:var(--brand)}
.mv p{color:var(--muted);font-size:.93rem}
@media (max-width:900px){.about{grid-template-columns:1fr;gap:32px}}
@media (max-width:480px){.mv{grid-template-columns:1fr}}

/* Số liệu */
.band{background:var(--brand-deep);color:#e9f7f0;padding-block:48px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat b{display:block;font-size:clamp(1.8rem,3.4vw,2.6rem);font-weight:800;color:#fff;font-variant-numeric:tabular-nums}
.stat span{opacity:.85;font-size:.95rem}
@media (max-width:760px){.stats{grid-template-columns:1fr 1fr;row-gap:28px}}

/* Vì sao */
.why{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.why-item{background:var(--card);border:1px solid var(--border);border-radius:20px;padding:26px;display:grid;gap:10px;align-content:start}
.why-ico{width:48px;height:48px;border-radius:14px;background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;font:800 .95rem var(--f-display)}
.why-item p{color:var(--muted)}
@media (max-width:820px){.why{grid-template-columns:1fr}}

/* Khóa học */
.courses{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.course{background:var(--card);border:1px solid var(--border);border-radius:20px;overflow:hidden;display:grid;grid-template-rows:auto 1fr;transition:box-shadow .2s,transform .2s}
.course:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.course-head{position:relative;overflow:hidden;background:var(--bg-2)}
.course-head .ill{display:block;width:100%;height:auto;aspect-ratio:16/10;transition:transform .4s}
.course:hover .ill{transform:scale(1.04)}
.course a.course-head{display:block}
.course-tag{justify-self:start;font-size:.78rem;font-weight:700;color:var(--accent);background:var(--accent-soft);padding:4px 10px;border-radius:999px}
.c1 .course-tag{color:var(--brand);background:var(--brand-soft)}
.course-body{padding:18px 22px 24px;display:grid;gap:10px;grid-template-rows:auto auto 1fr auto auto}
.course-body h3 a{color:inherit;text-decoration:none}
.course-body h3 a:hover{color:var(--brand)}
.course-body .btn{margin-top:4px;padding:.7em 1em}
.course-body p{color:var(--muted);font-size:.95rem}
.course ul{margin:0;padding:0;list-style:none;display:grid;gap:6px}
.course li{display:flex;gap:8px;font-size:.92rem}
.course li::before{content:"✓";color:var(--brand);font-weight:700}
@media (max-width:1040px){.courses{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.courses{grid-template-columns:1fr}}

/* Giáo viên */
.carousel{position:relative}
.teachers{display:grid;grid-auto-flow:column;grid-auto-columns:calc((100% - 3*20px)/4);gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;scroll-behavior:smooth;padding-bottom:8px;scrollbar-width:none;overscroll-behavior-x:contain}
.teachers::-webkit-scrollbar{display:none}
.teacher{scroll-snap-align:start;background:var(--card);border:1px solid var(--border);border-radius:20px;overflow:hidden;display:grid;grid-template-rows:auto 1fr}
.teacher img{width:100%;aspect-ratio:3/4;object-fit:cover;object-position:50% 20%;background:var(--bg-2);transition:transform .4s}
.teacher:hover img{transform:scale(1.04)}
.teacher .ph{overflow:hidden}
.teacher-body{padding:14px 16px 18px;display:grid;gap:2px;align-content:start}
.teacher-body small{color:var(--brand);font-weight:600;font-size:.82rem}
.car-nav{display:flex;align-items:center;justify-content:center;gap:16px;margin-top:22px}
.car-btn{width:46px;height:46px;border-radius:50%;border:1.5px solid var(--border);background:var(--card);color:var(--brand);font:700 1.3rem var(--f-body);cursor:pointer;display:grid;place-items:center;box-shadow:var(--shadow)}
.car-btn:hover{background:var(--brand);color:var(--brand-ink);border-color:var(--brand)}
.car-btn:disabled{opacity:.35;cursor:default;background:var(--card);color:var(--brand)}
.car-count{font-variant-numeric:tabular-nums;color:var(--muted);font-weight:600;min-width:70px;text-align:center}
@media (max-width:960px){.teachers{grid-auto-columns:calc((100% - 2*16px)/3);gap:16px}}
@media (max-width:640px){.teachers{grid-auto-columns:calc((100% - 12px)/2.2);gap:12px}.teacher-body h3{font-size:1rem}}

/* Buổi học */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;counter-reset:s}
.step{background:var(--card);border:1px solid var(--border);border-radius:18px;padding:22px;display:grid;gap:8px;align-content:start;counter-increment:s}
.step::before{content:counter(s);width:34px;height:34px;border-radius:10px;background:var(--brand);color:var(--brand-ink);font-weight:700;display:grid;place-items:center}
.step p{color:var(--muted);font-size:.95rem}
.step .min{font-weight:600;color:var(--accent);font-size:.9rem}
@media (max-width:860px){.steps{grid-template-columns:1fr 1fr}}
@media (max-width:480px){.steps{grid-template-columns:1fr}}

/* Giờ học */
.tz{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.tz-box{background:var(--card);border:1px solid var(--border);border-radius:20px;padding:24px;display:grid;gap:16px;box-shadow:var(--shadow)}
.field{display:grid;gap:6px}
.field label{font-weight:600;font-size:.9rem}
select,input,textarea{font:inherit;color:var(--ink);background:var(--bg);border:1.5px solid var(--border);border-radius:12px;padding:.7em .85em;width:100%}
select:focus,input:focus,textarea:focus{border-color:var(--brand);outline:none;box-shadow:0 0 0 3px var(--brand-soft)}
.slots{display:grid;gap:8px}
.slot{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px 14px;border-radius:12px;background:var(--bg-2);font-variant-numeric:tabular-nums;flex-wrap:wrap}
.slot b{font-size:1.05rem}
.slot span{color:var(--muted);font-size:.9rem}
.note{font-size:.85rem;color:var(--muted)}
@media (max-width:820px){.tz{grid-template-columns:1fr}}

/* Hoạt động */
.gallery{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:190px;gap:12px}
.gallery figure{margin:0;border-radius:16px;overflow:hidden;position:relative}
.gallery img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.gallery figure:hover img{transform:scale(1.05)}
.gallery .big{grid-column:span 2;grid-row:span 2}
.gallery figcaption{position:absolute;left:10px;bottom:10px;background:rgba(0,0,0,.55);color:#fff;font-size:.8rem;padding:4px 10px;border-radius:999px}
@media (max-width:760px){.gallery{grid-template-columns:1fr 1fr;grid-auto-rows:150px}}

.videos{display:grid;grid-template-columns:1.6fr 1fr;gap:20px}
.vid-side{display:grid;gap:20px}
.vid{display:grid;grid-template-rows:auto 1fr;background:var(--card);border:1px solid var(--border);border-radius:20px;overflow:hidden;text-decoration:none;color:var(--ink);transition:box-shadow .2s,transform .2s}
.vid:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.vid-side .vid{grid-template-rows:none;grid-template-columns:44% 1fr}
.poster{position:relative;display:grid;place-items:center;aspect-ratio:16/9;overflow:hidden;color:#fff}
.vid-side .poster{aspect-ratio:auto;min-height:130px}
.poster-founder{background:radial-gradient(circle at 25% 30%,#0ec400 0,#0b8f00 30%,#0a3f86 100%)}
.poster-lesson{background:linear-gradient(135deg,#0ec400,#0078f0)}
.poster-channel{background:linear-gradient(135deg,#0a3f86,#0b8f00);gap:6px;align-content:center}
.poster-logo{position:absolute;left:18px;top:16px;height:52px;background:#fff;border-radius:12px;padding:6px}
.poster-tag{position:absolute;left:18px;bottom:16px;background:#ffd166;color:#3a2a00;font-weight:700;font-size:.82rem;padding:5px 12px;border-radius:999px}
.poster-word{font-weight:800;font-size:1.05rem;text-align:center;line-height:1.25;padding:0 10px}
.play{width:78px;height:78px;border-radius:50%;background:rgba(255,255,255,.95);box-shadow:0 10px 30px rgba(0,0,0,.25);position:relative;transition:transform .2s}
.play::after{content:"";position:absolute;left:32px;top:24px;border-left:24px solid #e02424;border-top:15px solid transparent;border-bottom:15px solid transparent}
.play.sm{width:40px;height:40px;position:absolute;right:10px;bottom:10px}
.play.sm::after{left:16px;top:12px;border-left-width:12px;border-top-width:8px;border-bottom-width:8px}
.vid:hover .play{transform:scale(1.08)}
.yt{width:44px;height:30px;border-radius:9px;background:#e02424;position:relative}
.yt::after{content:"";position:absolute;left:17px;top:8px;border-left:12px solid #fff;border-top:7px solid transparent;border-bottom:7px solid transparent}
.vid-body{padding:18px 20px 20px;display:grid;gap:8px;align-content:start}
.vid-main .vid-body h3{font-size:1.3rem}
.vid-body p{color:var(--muted)}
.vid-link{color:var(--brand);font-weight:600;font-size:.92rem}
@media (max-width:900px){.videos{grid-template-columns:1fr}}
@media (max-width:480px){.vid-side .vid{grid-template-columns:1fr}.vid-side .poster{aspect-ratio:16/9}}
/* Đăng ký */
.reg-sec{background:linear-gradient(135deg,#0b8f00 0%,#0a6a3a 40%,#0a3f86 100%);color:#fff;position:relative;overflow:hidden}
.reg-sec::before{content:"";position:absolute;width:420px;height:420px;border-radius:50%;background:rgba(255,255,255,.06);left:-140px;top:-160px}
.reg{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;position:relative}
.reg-intro{display:grid;gap:16px}
.reg-intro h2{color:#fff}
.eyebrow-inv{background:#ffd166;color:#3a2a00}
.reg-lead{font-size:1.1rem;opacity:.92;max-width:46ch}
.reg-points{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.reg-points li{display:flex;gap:10px;align-items:flex-start;font-weight:500}
.reg-points li::before{content:"✓";flex:none;width:24px;height:24px;border-radius:50%;background:#fff;color:#0b8f00;font-weight:800;display:grid;place-items:center;font-size:.85rem}
.reg-contact{display:grid;gap:8px;margin-top:8px}
.reg-contact>span{font-size:.9rem;opacity:.85}
.reg-contact .contact{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.2);padding:10px 14px}
.reg-contact .contact small{color:rgba(255,255,255,.75)}
.reg-contact .contact b{color:#fff}
.reg-contact .copy{background:transparent;color:#fff;border-color:rgba(255,255,255,.45)}
.reg-form{background:var(--card);color:var(--ink);border-radius:24px;padding:30px;display:grid;gap:16px;box-shadow:0 30px 60px -20px rgba(0,0,0,.45)}
.form-head{display:grid;gap:2px;padding-bottom:4px}
.form-head b{font-size:1.35rem;font-weight:800}
.form-head span{color:var(--muted);font-size:.92rem}
.reg-form input:not([type=radio]){padding:.85em 1em;font-size:1.02rem}
.chips{border:0;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:8px}
.chips legend{font-weight:600;font-size:.9rem;margin-bottom:6px;padding:0}
.chips label{cursor:pointer}
.chips input{position:absolute;opacity:0;pointer-events:none}
.chips span{display:inline-block;padding:.55em 1em;border-radius:999px;border:1.5px solid var(--border);font-weight:500;font-size:.92rem;transition:background .15s,border-color .15s}
.chips input:checked+span{background:var(--brand);border-color:var(--brand);color:var(--brand-ink)}
.chips input:focus-visible+span{outline:3px solid var(--accent);outline-offset:2px}
.err{color:#d64545;font-size:.9rem;font-weight:500}
[aria-invalid=true]{border-color:#d64545!important}
.btn-big{width:100%;padding:1em;font-size:1.08rem;border-radius:14px}
.note.center{text-align:center;margin-top:-6px}
.done{background:var(--brand-soft);border-radius:14px;padding:18px;display:grid;gap:10px}
.done pre{white-space:pre-wrap;font:inherit;font-size:.92rem;margin:0;background:var(--card);border-radius:10px;padding:12px;border:1px solid var(--border)}
.contact{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:14px 16px;background:var(--card);border:1px solid var(--border);border-radius:14px;flex-wrap:wrap}
.contact div{min-width:0}
.contact small{display:block;color:var(--muted);font-size:.8rem}
.contact b{font-variant-numeric:tabular-nums;word-break:break-all}
.copy{font:600 .85rem var(--f-body);border:1.5px solid var(--border);background:var(--bg);color:var(--brand);border-radius:10px;padding:.4em .9em;cursor:pointer}
@media (max-width:860px){.reg{grid-template-columns:1fr;gap:32px}.reg-form{padding:22px}}

/* FAQ */
.faq{display:grid;gap:10px;max-width:820px;margin:0 auto}
details{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:18px 20px}
summary{cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:12px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-weight:700;font-size:1.3rem;line-height:1;color:var(--brand)}
details[open] summary::after{content:"–"}
details p{color:var(--muted);margin-top:10px}

.cta-band{background:linear-gradient(120deg,var(--brand),var(--brand-deep));color:#fff;border-radius:24px;padding:40px;display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.cta-band h2{font-size:clamp(1.4rem,2.6vw,2rem)}

footer{background:var(--brand-deep);color:#cfe6da;padding-block:52px 28px;font-size:.92rem}
.foot{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px}
.foot h3{color:#fff;font-size:1rem;margin-bottom:12px}
.foot ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.foot a{color:#e9f7f0;text-decoration:none}
.foot a:hover{text-decoration:underline}
.foot-bottom{border-top:1px solid rgba(255,255,255,.15);margin-top:36px;padding-top:18px;font-size:.82rem;opacity:.8}
@media (max-width:760px){.foot{grid-template-columns:1fr}}

/* Menu: thả xuống khóa học + menu điện thoại */
.nav-actions{display:flex;align-items:center;gap:10px}
.nav-actions .btn{padding:.6em 1.1em;color:var(--brand-ink)}
.dd{position:relative}
.dd-btn{font:500 .95rem var(--f-body);color:var(--ink);background:none;border:0;padding:8px 0;cursor:pointer;display:flex;align-items:center;gap:6px}
.dd-btn[aria-current=page]{color:var(--brand);font-weight:700}
.dd-btn:hover,.dd.open .dd-btn{color:var(--brand)}
.caret{width:8px;height:8px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:translateY(-2px) rotate(45deg);transition:transform .2s}
.dd.open .caret{transform:translateY(2px) rotate(-135deg)}
.dd-menu{position:absolute;top:calc(100% + 10px);left:50%;transform:translateX(-50%);width:320px;background:var(--card);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow);padding:8px;display:none;gap:2px;z-index:30}
.dd-menu::before{content:"";position:absolute;left:0;right:0;top:-12px;height:12px}
.dd.open .dd-menu{display:grid}
@media (hover:hover) and (min-width:921px){.dd:hover .dd-menu{display:grid}.dd:hover .caret{transform:translateY(2px) rotate(-135deg)}}
.dd-item{display:grid;gap:1px;padding:10px 12px;border-radius:10px;text-decoration:none}
.nav-links .dd-item b{color:var(--ink);font-weight:600;font-size:.95rem}
.dd-item small{color:var(--muted);font-size:.8rem}
.dd-item:hover,.dd-item:focus-visible,.dd-item[aria-current=page]{background:var(--brand-soft)}
.nav-links .dd-item:hover b,.nav-links .dd-item[aria-current=page] b{color:var(--brand)}
.nav-links .dd-all{padding:10px 12px;font-size:.88rem;font-weight:600;color:var(--brand);border-top:1px solid var(--border);margin-top:4px}
.menu-btn{display:none;width:44px;height:44px;border-radius:12px;border:1.5px solid var(--border);background:var(--card);cursor:pointer;position:relative}
.menu-btn span,.menu-btn span::before,.menu-btn span::after{position:absolute;left:12px;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:transform .2s,opacity .2s}
.menu-btn span{top:20px}
.menu-btn span::before,.menu-btn span::after{content:"";left:0}
.menu-btn span::before{top:-6px}.menu-btn span::after{top:6px}
.menu-btn[aria-expanded=true] span{background:transparent}
.menu-btn[aria-expanded=true] span::before{transform:translateY(6px) rotate(45deg)}
.menu-btn[aria-expanded=true] span::after{transform:translateY(-6px) rotate(-45deg)}
@media (max-width:920px){
  .menu-btn{display:block}
  .nav-links{position:absolute;left:0;right:0;top:100%;background:var(--card);border-bottom:1px solid var(--border);box-shadow:var(--shadow);display:none;flex-direction:column;align-items:stretch;gap:0;padding:8px max(16px,env(safe-area-inset-right,0px)) 16px max(16px,env(safe-area-inset-left,0px));max-height:calc(100vh - 80px);overflow-y:auto}
  .nav-links.open{display:flex}
  .nav-links>a,.dd-btn{padding:14px 4px;font-size:1.02rem;border-bottom:1px solid var(--border);width:100%;justify-content:space-between}
  .dd-menu{position:static;transform:none;width:auto;box-shadow:none;border:0;padding:4px 0 8px 8px;background:transparent}
  .dd-menu::before{display:none}
}
@media (max-width:420px){.nav-actions .btn{padding:.55em .8em;font-size:.88rem}}
/* Số liệu sinh động */
.band{position:relative;overflow:hidden;background:linear-gradient(120deg,#0a3f86 0%,#0b4f9e 55%,#0a6a3a 100%)}
.band::before,.band::after{content:"";position:absolute;border-radius:50%;pointer-events:none}
.band::before{width:340px;height:340px;left:-90px;top:-170px;background:rgba(14,196,0,.18)}
.band::after{width:260px;height:260px;right:-60px;bottom:-150px;background:rgba(255,255,255,.07)}
.stats{position:relative;gap:16px}
.stat{display:grid;justify-items:center;gap:6px;padding:18px 10px;border-radius:18px;transition:background .25s,transform .25s}
.stat:hover{background:rgba(255,255,255,.08);transform:translateY(-4px)}
.stat+.stat{box-shadow:-1px 0 0 rgba(255,255,255,.14)}
.stat-ico{width:52px;height:52px;border-radius:16px;background:rgba(255,255,255,.12);color:#9ff08f;display:grid;place-items:center;margin-bottom:4px;transition:transform .3s}
.stat-ico svg{width:28px;height:28px}
.stat:hover .stat-ico{transform:rotate(-8deg) scale(1.08)}
.stat b{display:inline-flex;align-items:center;gap:10px;line-height:1.1}
.live{width:12px;height:12px;border-radius:50%;background:#3fdc2f;box-shadow:0 0 0 0 rgba(63,220,47,.7);animation:live 1.8s infinite}
@keyframes live{70%{box-shadow:0 0 0 12px rgba(63,220,47,0)}100%{box-shadow:0 0 0 0 rgba(63,220,47,0)}}
.stat b.pop{animation:pop .7s cubic-bezier(.2,1.6,.4,1) both}
@keyframes pop{0%{transform:scale(.4);opacity:0}100%{transform:none;opacity:1}}
@media (max-width:760px){.stat+.stat{box-shadow:none}}
@media (prefers-reduced-motion:reduce){.live,.stat b.pop{animation:none}}
img.ill{object-fit:cover}
.page-hero .ill-wrap img.ill{aspect-ratio:16/10}
/* Trang bài viết */
.post-wrap{padding-block:40px 72px}
.post-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;align-items:start}
.post-article{min-width:0}
.post-title{font-size:clamp(1.8rem,4vw,2.6rem);font-weight:800;margin:6px 0 10px}
.post-meta{display:flex;flex-wrap:wrap;gap:8px;color:var(--muted);font-size:.92rem;margin-bottom:22px}
.post-cover{width:100%;border-radius:20px;aspect-ratio:16/9;object-fit:cover;margin-bottom:24px}
.post-video{position:relative;aspect-ratio:16/9;border-radius:20px;overflow:hidden;background:#000;margin-bottom:24px}
.post-video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.post-summary{background:var(--brand-soft);border-left:4px solid var(--brand);border-radius:12px;padding:16px 20px;margin-bottom:24px}
.post-summary b{display:block;color:var(--brand);margin-bottom:4px;font-size:.85rem;text-transform:uppercase;letter-spacing:.05em}
.post-content{font-size:1.08rem;line-height:1.8;max-width:70ch}
.post-content h2{font-size:1.5rem;margin:1.6em 0 .5em}
.post-content h3{font-size:1.2rem;margin:1.4em 0 .4em}
.post-content p,.post-content ul,.post-content ol,.post-content blockquote{margin:0 0 1em}
.post-content img{border-radius:14px;margin:1em 0}
.post-content blockquote{border-left:4px solid var(--accent);padding:4px 0 4px 16px;color:var(--muted)}
.post-content a,.kw-link{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.post-faq{margin-top:36px;display:grid;gap:10px}
.post-faq h2{font-size:1.4rem;margin-bottom:6px}
.post-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:28px}
.post-tags span{background:var(--bg-2);border:1px solid var(--border);border-radius:999px;padding:4px 12px;font-size:.85rem;color:var(--muted)}
.post-side{display:grid;gap:18px;position:sticky;top:calc(env(safe-area-inset-top,0px) + 96px)}
.side-card{background:var(--card);border:1px solid var(--border);border-radius:18px;padding:20px;display:grid;gap:10px}
.side-card p{color:var(--muted);font-size:.95rem}
.side-links{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.side-links a{color:var(--ink);text-decoration:none;font-weight:500}
.side-links a:hover{color:var(--brand)}
.post-loading{display:flex;align-items:center;gap:12px;color:var(--muted);padding:60px 0}
.dot-spin{width:22px;height:22px;border-radius:50%;border:3px solid var(--brand-soft);border-top-color:var(--brand);animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.post-empty{display:grid;gap:14px;justify-items:start;padding:40px 0}
@media (max-width:900px){.post-grid{grid-template-columns:1fr}.post-side{position:static}}
/* Video nhúng */
.poster.is-embed{cursor:default;background:#000}
.poster.is-embed>*:not(iframe){visibility:hidden}
.poster iframe{z-index:2}
.poster{cursor:pointer;border:0;padding:0;width:100%;font:inherit}
.poster iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.vid-side .poster iframe{position:absolute}
.embed-note{position:absolute;inset:0;display:grid;place-items:center;align-content:center;gap:10px;background:rgba(5,25,50,.88);color:#fff;text-align:center;padding:16px;font-size:.92rem}
.embed-note a{color:#ffd166;font-weight:700}
.vid-body h3 a{color:inherit;text-decoration:none}
div.vid{cursor:default}

/* Trang con */
.page-hero{background:linear-gradient(160deg,var(--brand-soft),var(--accent-soft) 55%,var(--bg) 100%);padding-block:48px 56px}
.crumbs{font-size:.88rem;color:var(--muted);display:flex;gap:6px;flex-wrap:wrap;margin-bottom:14px}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--brand)}
.page-hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:44px;align-items:center}
.page-hero h1{font-size:clamp(1.9rem,4.2vw,3rem);font-weight:800;margin-bottom:14px}
.page-hero .lead{margin-bottom:20px}
.page-hero .ill-wrap{border-radius:24px;overflow:hidden;box-shadow:var(--shadow);background:var(--card)}
.page-hero .ill-wrap .ill,.page-hero .ill-wrap img{display:block;width:100%;height:auto}
.page-hero .ill-wrap img{aspect-ratio:4/3;object-fit:cover}
.meta{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:22px}
.meta div{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:10px 14px;display:grid;gap:2px;min-width:0}
.meta small{color:var(--muted);font-size:.78rem;font-weight:600;text-transform:uppercase;letter-spacing:.04em}
.meta b{font-size:.98rem}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px}
@media (max-width:860px){.page-hero-grid{grid-template-columns:1fr;gap:28px}}
.outcomes{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.outcome{background:var(--card);border:1px solid var(--border);border-radius:18px;padding:22px;display:grid;gap:8px;align-content:start}
.outcome .num{width:40px;height:40px;border-radius:12px;background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;font-weight:800}
.outcome p{color:var(--muted);font-size:.95rem}
@media (max-width:860px){.outcomes{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.outcomes{grid-template-columns:1fr}}
.fit{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.fit ul{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.fit li{display:flex;gap:12px;align-items:flex-start}
.fit li::before{content:"✓";flex:none;width:26px;height:26px;border-radius:50%;background:var(--brand);color:var(--brand-ink);display:grid;place-items:center;font-weight:800;font-size:.85rem}
@media (max-width:860px){.fit{grid-template-columns:1fr;gap:28px}}
.others{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media (max-width:860px){.others{grid-template-columns:1fr}}
.story{display:grid;grid-template-columns:1fr 1.1fr;gap:48px;align-items:center}
.story-copy{display:grid;gap:16px}
.story-copy blockquote{margin:0;border-left:4px solid var(--brand);padding:6px 0 6px 18px;font-size:1.08rem;color:var(--ink)}
.story .vid{grid-template-rows:auto}
@media (max-width:900px){.story{grid-template-columns:1fr;gap:28px}}
.vm{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.vm article{background:var(--card);border:1px solid var(--border);border-radius:20px;padding:28px;display:grid;gap:10px;align-content:start}
.vm .why-ico{margin-bottom:4px}
.vm p{color:var(--muted)}
@media (max-width:760px){.vm{grid-template-columns:1fr}}
.tabs{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-bottom:28px}
.tabs button{font:600 .95rem var(--f-body);padding:.6em 1.2em;border-radius:999px;border:1.5px solid var(--border);background:var(--card);color:var(--ink);cursor:pointer}
.tabs button[aria-pressed=true]{background:var(--brand);border-color:var(--brand);color:var(--brand-ink)}
.news{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.post{background:var(--card);border:1px solid var(--border);border-radius:20px;overflow:hidden;display:grid;grid-template-rows:auto 1fr}
.post .thumb{position:relative;aspect-ratio:16/9;overflow:hidden;display:grid;place-items:center;color:#fff}
.post .thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.post-body{padding:18px 20px 22px;display:grid;gap:8px;align-content:start}
.post-body .kind{font-size:.75rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--accent)}
.post-body h3 a{color:inherit;text-decoration:none}
.post-body h3 a:hover{color:var(--brand)}
.post-body p{color:var(--muted);font-size:.95rem}
.post-body .vid-link{text-decoration:none}
@media (max-width:960px){.news{grid-template-columns:1fr 1fr}}
@media (max-width:600px){.news{grid-template-columns:1fr}}
.nav-links a[aria-current=page]{color:var(--brand);font-weight:700}