:root{--p:#E8262B;--pd:#B8141A;--navy:#1A1A1A;--bg:#FFF6F6;--card:#fff;--chip:#FFE5E5;--stroke:#F3DADA;--muted:#6E6E6E;--cyan:#FF8A3D}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--navy);background:var(--bg);line-height:1.6}
a{color:var(--p)}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
.en,.vi{display:none}body.lang-en .en,body.lang-vi .vi{display:revert}
body.lang-en span.en,body.lang-vi span.vi{display:inline}
nav{position:sticky;top:0;z-index:10;background:rgba(255,246,246,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--stroke)}
nav .wrap{display:flex;align-items:center;gap:18px;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--navy);text-decoration:none}
.brand img{width:34px;height:34px;border-radius:9px}
nav .links{margin-left:auto;display:flex;gap:18px;align-items:center;font-size:15px}
nav .links a{color:var(--navy);text-decoration:none;font-weight:600}
.lang button{border:1px solid var(--stroke);background:#fff;color:var(--muted);font-weight:700;font-size:13px;padding:5px 12px;cursor:pointer}
.lang button:first-child{border-radius:999px 0 0 999px}.lang button:last-child{border-radius:0 999px 999px 0}
body.lang-en #b-en,body.lang-vi #b-vi{background:var(--p);border-color:var(--p);color:#fff}
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:16px;padding:13px 26px;border-radius:999px;text-decoration:none;border:2px solid transparent}
.btn-p{background:var(--p);color:#fff;box-shadow:0 8px 22px rgba(30,107,255,.35)}
.btn-o{background:#fff;color:var(--pd);border-color:var(--stroke)}
.hero{background:linear-gradient(135deg,#1A1A1A,#8E0F14);color:#fff;padding:72px 0 80px;position:relative;overflow:hidden}
.hero:after{content:"";position:absolute;right:-120px;top:-120px;width:460px;height:460px;border-radius:50%;background:var(--p);opacity:.3}
.hero .wrap{display:flex;gap:40px;align-items:center;flex-wrap:wrap;position:relative;z-index:1}
.hero .txt{flex:1 1 420px}
.hero img.ico{width:168px;height:168px;border-radius:38px;box-shadow:0 20px 50px rgba(0,0,0,.35)}
h1{font-size:clamp(34px,5vw,54px);line-height:1.12;margin:0 0 8px;font-weight:800}
.hero h2{font-size:clamp(20px,2.5vw,26px);margin:0 0 18px;color:#F5A3A5;font-weight:600}
.hero p{color:#FFD0D0;font-size:18px;max-width:560px}
.cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.badges{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}
.badges span{background:rgba(255,255,255,.12);border-radius:999px;padding:5px 14px;font-size:14px;color:#fff}
section{padding:68px 0}
h2.t{font-size:clamp(26px,3.5vw,36px);margin:0 0 10px;text-align:center}
p.sub{color:var(--muted);text-align:center;max-width:620px;margin:0 auto 38px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px}
.card{background:var(--card);border:1px solid var(--stroke);border-radius:22px;padding:26px;box-shadow:0 4px 18px rgba(11,31,68,.05)}
.card .ic{width:48px;height:48px;border-radius:14px;background:var(--chip);display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.card h3{margin:0 0 6px;font-size:19px}.card p{margin:0;color:var(--muted);font-size:15px}
.price{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:18px;margin-top:22px}
.price .card{text-align:center}
.price .amt{font-size:32px;font-weight:800;color:var(--p)}
.price .card.hi{border:2px solid var(--p)}
.tag{display:inline-block;background:var(--p);color:#fff;border-radius:999px;font-size:12px;font-weight:700;padding:2px 10px;margin-bottom:8px}
.cmp{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px;margin-bottom:10px}
.cmp ul{margin:12px 0 0;padding-left:20px;color:var(--muted)}
.faq details{background:var(--card);border:1px solid var(--stroke);border-radius:16px;padding:16px 22px;margin-bottom:12px}
.faq summary{cursor:pointer;font-weight:700}.faq p{color:var(--muted);margin:10px 0 0}
.dl{background:var(--navy);color:#fff;text-align:center;border-radius:28px;padding:52px 20px}
.dl p{color:#FFD0D0}
footer{padding:36px 0 56px;color:var(--muted);font-size:14px;text-align:center}
footer a{margin:0 10px;color:var(--muted)}
.doc{max-width:780px;margin:0 auto;padding:44px 20px 70px}
.doc h1{color:var(--navy);font-size:34px}.doc h2{margin-top:32px;font-size:22px}
.doc code{background:var(--chip);padding:1px 6px;border-radius:6px}
.doc .box{background:#fff;border:1px solid var(--stroke);border-radius:18px;padding:8px 26px 20px}
@media(max-width:640px){nav .links a.h{display:none}.hero{padding:48px 0 56px}.hero img.ico{width:110px;height:110px;border-radius:26px}}