:root{
  --red:#e31b23; --red-d:#b8121a; --ink:#111214; --ink2:#3a3d42; --mute:#6b7078;
  --line:#e6e7ea; --bg:#fff; --soft:#f5f5f6; --dark:#0c0c0d;
  --zalo:#0068ff; --shopee:#ee4d2d; --tiktok:#000;
  --r:16px; --max:1180px;
}
*{box-sizing:border-box;margin:0}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{font-family:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--ink);background:var(--bg);line-height:1.55;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
section{padding:72px 0}
.eyebrow{font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--red);margin-bottom:10px}
h2{font-size:clamp(26px,4vw,40px);line-height:1.15;font-weight:800;letter-spacing:-.01em}
.lead{color:var(--ink2);max-width:620px;margin-top:12px;font-size:17px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 22px;border-radius:999px;font-weight:700;font-size:15px;border:2px solid transparent;cursor:pointer;transition:.18s;font-family:inherit}
.btn-red{background:var(--red);color:#fff}.btn-red:hover{background:var(--red-d)}
.btn-line{border-color:var(--ink);color:var(--ink);background:#fff}.btn-line:hover{background:var(--ink);color:#fff}
.btn-shopee{background:var(--shopee);color:#fff}.btn-tiktok{background:var(--tiktok);color:#fff}.btn-zalo{background:var(--zalo);color:#fff}
.btn:hover{transform:translateY(-1px)}

/* top bar + header */
.topbar{background:var(--dark);color:#d9d9dc;font-size:13px}
.topbar .wrap{display:flex;justify-content:space-between;gap:12px;padding-top:8px;padding-bottom:8px;flex-wrap:wrap}
.topbar b{color:#fff}
.topbar a:hover{color:#fff;text-decoration:underline}
header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
header .wrap{display:flex;align-items:center;gap:28px;height:68px}
.logo img{height:30px;width:auto}
nav{display:flex;gap:24px;margin-left:auto;font-size:14.5px;font-weight:600}
nav a{color:var(--ink2);padding:6px 0;border-bottom:2px solid transparent}
nav a:hover{color:var(--red);border-color:var(--red)}
.menu-btn{display:none;margin-left:auto;background:none;border:0;font-size:26px;cursor:pointer}
header .btn{padding:9px 18px;font-size:14px}

/* hero */
.hero{background:linear-gradient(180deg,#f7f7f8 0%,#fff 100%);padding:56px 0 40px;overflow:hidden}
.hero .wrap{display:grid;grid-template-columns:1.05fr 1fr;gap:40px;align-items:center}
.hero h1{font-size:clamp(34px,5.6vw,60px);line-height:1.06;font-weight:800;letter-spacing:-.02em}
.hero h1 em{font-style:normal;color:var(--red)}
.hero p{margin-top:18px;font-size:18px;color:var(--ink2);max-width:520px}
.hero .cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.hero-note{margin-top:14px;font-size:13px;color:var(--mute)}
.hero-visual{position:relative;height:460px}
.hero-visual .disc{position:absolute;right:4%;top:6%;width:84%;aspect-ratio:1;border-radius:50%;background:radial-gradient(circle at 35% 30%,#ff4a50,var(--red) 55%,var(--red-d))}
.hero-visual .pkg{position:absolute;left:6%;bottom:0;height:96%;width:auto;max-width:none;filter:drop-shadow(0 24px 30px rgba(0,0,0,.28));z-index:2}
.hero-visual .tray{position:absolute;right:0;bottom:6%;width:56%;border-radius:14px;box-shadow:0 20px 40px rgba(0,0,0,.32);z-index:3;border:4px solid #fff}
.trust{display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin-top:44px;border:1px solid var(--line);border-radius:var(--r);background:#fff}
.trust div{padding:20px 24px;border-right:1px solid var(--line)}
.trust div:last-child{border:0}
.trust b{display:block;font-size:15px}
.trust span{font-size:13.5px;color:var(--mute)}

/* products */
.prod-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:40px}
.pcard{border-radius:24px;overflow:hidden;position:relative;display:flex;flex-direction:column;min-height:520px;color:#fff}
.pcard.clear{background:linear-gradient(160deg,#f1f2f4,#dfe2e6);color:var(--ink)}
.pcard.priv{background:linear-gradient(160deg,#1b1b1e,#050506)}
.pcard .txt{padding:32px 32px 0;z-index:2}
.tag{display:inline-block;font-size:12px;font-weight:700;padding:5px 12px;border-radius:999px;background:var(--red);color:#fff;margin-bottom:14px}
.pcard h3{font-size:30px;line-height:1.15;font-weight:800}
.pcard p{margin-top:10px;font-size:15px;opacity:.85;max-width:340px}
.pcard .img{margin-top:auto;display:flex;gap:10px;justify-content:center;align-items:flex-end;padding:20px 24px 0}
.pcard .img img{border-radius:14px 14px 0 0;height:270px;width:auto;object-fit:cover}
.pcard .more{position:absolute;right:24px;top:28px;z-index:3;font-size:14px;font-weight:700;border-bottom:2px solid currentColor}
.disclaimer{font-size:12.5px;color:var(--mute);margin-top:16px}

/* privacy viewer */
.viewer{background:var(--dark);color:#fff;border-radius:28px;padding:44px;display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.viewer .eyebrow{color:#ff6a70}
.viewer .lead{color:#c9cbd0}
.vstage{background:#d9e3ea;border-radius:20px;aspect-ratio:3/3.4;overflow:hidden;display:grid;place-items:center}
.vstage img{height:100%;width:100%;object-fit:contain;transition:opacity .25s}
.vtabs{display:flex;gap:8px;margin-top:26px;flex-wrap:wrap}
.vtabs button{padding:10px 18px;border-radius:999px;border:1.5px solid #5a5d63;background:transparent;color:#fff;font:600 14px inherit;font-family:inherit;cursor:pointer}
.vtabs button.on{background:var(--red);border-color:var(--red)}
.vcap{margin-top:18px;font-size:13px;color:#9a9da4}

/* tray */
.alt{background:var(--soft)}
.tray-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;grid-template-rows:1fr 1fr;gap:16px;margin-top:40px}
.tcard{position:relative;border-radius:20px;overflow:hidden;background:#000;min-height:230px}
.tcard img{width:100%;height:100%;object-fit:cover}
.tcard.big{grid-row:span 2}
.tcard span{position:absolute;left:14px;bottom:14px;background:var(--red);color:#fff;font-weight:700;font-size:13.5px;padding:6px 12px;border-radius:8px}
.tcard.flat span{background:#fff;color:var(--ink)}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:40px;counter-reset:s}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:26px;counter-increment:s}
.step::before{content:counter(s);display:grid;place-items:center;width:38px;height:38px;border-radius:50%;background:var(--red);color:#fff;font-weight:800;margin-bottom:14px}
.step b{display:block;font-size:17px;margin-bottom:6px}
.step p{font-size:14.5px;color:var(--ink2)}

/* corners */
.detail{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.detail .pics{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.detail .pics img{border-radius:18px;aspect-ratio:3/4;object-fit:cover;width:100%}
.detail .pics img:first-child{grid-row:span 1;margin-top:28px}
.checks{margin-top:22px;list-style:none;padding:0;display:grid;gap:12px}
.checks li{padding-left:30px;position:relative;font-size:15.5px}
.checks li::before{content:"";position:absolute;left:0;top:5px;width:18px;height:18px;border-radius:50%;background:var(--red) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M2.5 6.2l2.2 2.2 4.8-4.8' fill='none' stroke='%23fff' stroke-width='1.8'/%3E%3C/svg%3E") center/12px no-repeat}

/* finder */
.finder{background:var(--ink);color:#fff;border-radius:28px;padding:48px;display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.finder .eyebrow{color:#ff6a70}.finder .lead{color:#c9cbd0}
.finder ol{margin:22px 0 0;padding-left:20px;color:#e3e4e7;display:grid;gap:8px;font-size:15px}
.fbox{background:#fff;color:var(--ink);border-radius:20px;padding:26px}
.fbox label{font-weight:700;font-size:14px;display:block;margin:14px 0 6px}
.fbox label:first-child{margin-top:0}
.fbox input,.fbox select,.fbox textarea{width:100%;padding:13px 14px;border:1.5px solid var(--line);border-radius:12px;font:inherit;font-size:15px}
.fbox input:focus,.fbox select:focus,.fbox textarea:focus{outline:0;border-color:var(--red)}
.fbox .btn{width:100%;margin-top:18px}
.fbox small{display:block;margin-top:10px;color:var(--mute);font-size:12.5px}

/* channels */
.chan{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:40px}
.ccard{border:1px solid var(--line);border-radius:22px;padding:28px;display:flex;flex-direction:column;gap:10px;background:#fff;transition:.2s}
.ccard:hover{box-shadow:0 18px 40px rgba(0,0,0,.08);transform:translateY(-3px)}
.ccard .ic{width:48px;height:48px;border-radius:14px;display:grid;place-items:center;color:#fff;font-weight:800;font-size:20px}
.ccard h3{font-size:20px}
.ccard p{font-size:14.5px;color:var(--ink2);flex:1}
.verify{margin-top:28px;background:#fff6f6;border:1px solid #ffd5d7;border-radius:var(--r);padding:22px 26px;display:grid;grid-template-columns:auto 1fr;gap:18px;align-items:start}
.verify .shield{width:44px;height:44px;border-radius:12px;background:var(--red);display:grid;place-items:center;color:#fff;font-size:22px}
.verify b{display:block;margin-bottom:4px}
.verify ul{margin:6px 0 0;padding-left:18px;font-size:14.5px;color:var(--ink2)}

/* dealer */
.dealer{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.perks{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:26px}
.perk{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 18px;font-size:14.5px;font-weight:600}
.perk small{display:block;font-weight:400;color:var(--mute);margin-top:2px}

/* faq */
.faq{max-width:820px;margin:36px auto 0}
details{border-bottom:1px solid var(--line);padding:18px 4px}
summary{cursor:pointer;font-weight:700;font-size:16.5px;list-style:none;display:flex;justify-content:space-between;gap:16px}
summary::after{content:"+";font-size:24px;line-height:1;color:var(--red);font-weight:500}
details[open] summary::after{content:"–"}
details p{margin-top:10px;color:var(--ink2);font-size:15px}

/* footer */
footer{background:var(--dark);color:#b9bbc1;padding:56px 0 28px;font-size:14px}
.fgrid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
footer h4{color:#fff;font-size:14px;margin-bottom:12px}
footer ul{list-style:none;padding:0;display:grid;gap:8px}
footer a:hover{color:#fff}
.fcopy{border-top:1px solid #26272a;margin-top:36px;padding-top:20px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:12.5px}
.todo{background:#fff3b0;color:#5a4a00;padding:0 4px;border-radius:3px}

/* floating */
.float{position:fixed;right:16px;bottom:18px;z-index:60;display:grid;gap:10px}
.float a{width:52px;height:52px;border-radius:50%;display:grid;place-items:center;color:#fff;font-weight:800;font-size:13px;box-shadow:0 8px 22px rgba(0,0,0,.28)}
.float .z{background:var(--zalo)}.float .h{background:var(--red)}

@media(max-width:900px){
  section{padding:52px 0}
  nav{position:fixed;inset:68px 0 auto 0;background:#fff;flex-direction:column;gap:0;padding:8px 20px 20px;border-bottom:1px solid var(--line);display:none;margin:0}
  nav.open{display:flex}
  nav a{padding:14px 0;border-bottom:1px solid var(--line)}
  .menu-btn{display:block}
  header .btn{display:none}
  .hero .wrap,.prod-grid,.viewer,.detail,.finder,.dealer,.fgrid,.chan,.steps{grid-template-columns:1fr}
  .hero-visual{height:380px;order:-1}
  .trust{grid-template-columns:1fr}.trust div{border-right:0;border-bottom:1px solid var(--line)}
  .tray-grid{grid-template-columns:1fr 1fr}.tcard.big{grid-column:span 2;grid-row:auto;min-height:260px}
  .viewer,.finder{padding:26px}
  .pcard{min-height:480px}
  .topbar .wrap>span:last-child{display:none}
}

/* ===== v1.0 additions: multi-page ===== */
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:#fff;padding:8px 12px;z-index:100}
.page-head{background:linear-gradient(180deg,#f7f7f8,#fff);padding:48px 0 24px;border-bottom:1px solid var(--line)}
.crumbs{font-size:13px;color:var(--mute);margin-bottom:12px}.crumbs a:hover{color:var(--red)}
.page-head h1{font-size:clamp(28px,4.4vw,44px);line-height:1.12;font-weight:800;letter-spacing:-.015em}
.prose{max-width:760px;font-size:16.5px;color:var(--ink2)}
.prose h2{font-size:24px;color:var(--ink);margin:32px 0 10px}.prose h3{font-size:19px;color:var(--ink);margin:24px 0 8px}
.prose p,.prose ul,.prose ol{margin:12px 0}.prose ul,.prose ol{padding-left:22px}
.prose img{border-radius:14px;margin:18px 0}.prose figure{margin:20px 0}.prose figcaption{font-size:13px;color:var(--mute)}
.prose a{color:var(--red);text-decoration:underline}
.flash{margin:16px 0;padding:14px 18px;border-radius:12px;font-weight:600;font-size:15px}
.flash.ok{background:#eaf8ef;color:#126b32;border:1px solid #bfe8cc}.flash.err{background:#fff0f0;color:#a4121a;border:1px solid #ffd0d2}
.hp{position:absolute;left:-9999px;opacity:0;height:0;overflow:hidden}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.pdp{display:grid;grid-template-columns:1.1fr 1fr;gap:44px;align-items:start;padding:40px 0 60px}
.pdp .main{background:var(--soft);border-radius:24px;overflow:hidden;aspect-ratio:4/4.2;display:grid;place-items:center}
.pdp .main img{width:100%;height:100%;object-fit:contain}
.thumbs{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}
.thumbs button{width:76px;height:76px;border-radius:12px;overflow:hidden;border:2px solid transparent;padding:0;background:var(--soft);cursor:pointer}
.thumbs button.on{border-color:var(--red)}.thumbs img{width:100%;height:100%;object-fit:cover}
.pdp h1{font-size:clamp(26px,3.6vw,38px);line-height:1.15;font-weight:800;margin:8px 0 10px}
.buy-row{display:grid;gap:10px;margin:24px 0}
.search{display:flex;gap:10px;margin:28px 0 8px}
.search input{flex:1;padding:14px 18px;border:2px solid var(--line);border-radius:999px;font:inherit;font-size:16px}
.search input:focus{outline:0;border-color:var(--red)}
.suggest{position:relative}
.suggest ul{position:absolute;left:0;right:0;top:-2px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:0 14px 30px rgba(0,0,0,.1);list-style:none;padding:6px;z-index:5;margin:0}
.suggest li{padding:10px 14px;border-radius:10px;cursor:pointer;font-size:15px}.suggest li:hover{background:var(--soft)}
.result{display:grid;grid-template-columns:1fr auto;gap:12px;align-items:center;border:1px solid var(--line);border-radius:14px;padding:16px 20px;margin-top:10px;background:#fff}
.chip{display:inline-block;font-size:12.5px;font-weight:700;padding:4px 10px;border-radius:999px;background:var(--soft);margin-right:6px}
.chip.on{background:#eaf8ef;color:#126b32}.chip.off{background:#f3f3f4;color:#9a9da4;text-decoration:line-through}
.card3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:32px}
.acard{border:1px solid var(--line);border-radius:20px;overflow:hidden;background:#fff;display:flex;flex-direction:column;transition:.2s}
.acard:hover{box-shadow:0 16px 36px rgba(0,0,0,.08);transform:translateY(-3px)}
.acard img{aspect-ratio:16/10;object-fit:cover;width:100%}
.acard div{padding:18px 20px 22px}.acard b{display:block;font-size:17px;line-height:1.3}.acard p{font-size:14px;color:var(--ink2);margin-top:6px}
.error-page{text-align:center;padding:110px 0}.error-page h1{font-size:96px;color:var(--red);line-height:1}
.footer-badge img{height:48px;width:auto;margin-top:12px}
.sticky-buy{display:none}
@media(max-width:900px){
  .grid2,.pdp,.card3{grid-template-columns:1fr}
  .result{grid-template-columns:1fr}
  .sticky-buy{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:55;background:#fff;border-top:1px solid var(--line);padding:10px 14px;gap:10px}
  .sticky-buy .btn{flex:1;padding:12px 8px}
  body.has-sticky{padding-bottom:70px}body.has-sticky .float{bottom:84px}
}