:root{
  --red:#e30613;--red-d:#c00510;--ink:#1a1a1a;--ink-2:#444;--muted:#777;
  --line:#e6e6e6;--bg:#f7f7f7;--card:#fff;--radius:10px;
  --grad:linear-gradient(135deg,#ff2d43,#e30613);--shadow:0 4px 20px rgba(20,22,40,.06);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:'Be Vietnam Pro','Segoe UI',Roboto,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.5;-webkit-font-smoothing:antialiased;overflow-x:hidden}
body.noscroll{overflow:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font-family:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 16px}
.page{padding-top:16px;padding-bottom:30px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.block-head h1{margin:0;color:var(--red);font-size:22px;font-weight:700;text-transform:uppercase}

/* ===== header ===== */
.header{background:#fff;position:sticky;top:0;z-index:60;border-bottom:1px solid var(--line)}
.header .container{padding-top:12px;padding-bottom:14px}
.hrow{display:flex;align-items:center;gap:16px;min-height:64px}
.burger{display:none;width:40px;height:40px;border:0;background:transparent;flex-direction:column;justify-content:center;gap:5px;cursor:pointer;padding:0;flex-shrink:0}
.burger span{width:24px;height:2px;background:#333;display:block}
.logo img{height:56px;width:auto}
.dnav{display:flex;gap:4px;flex:1;justify-content:center;flex-wrap:wrap}
.dnav a{padding:8px 9px;font-size:13px;font-weight:600;color:var(--ink-2);border-radius:6px}
.dnav a:hover,.dnav a.active{color:var(--red)}
.zalo-ico{flex-shrink:0;background:#0068ff;color:#fff;font-weight:700;font-size:12px;width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center}
.search{display:flex;border:1px solid #d9d9d9;border-radius:6px;background:#fff;height:46px;overflow:hidden;max-width:760px;margin:12px auto 0}
.search:focus-within{border-color:#bbb}
.search input{flex:1;border:0;outline:0;padding:0 16px;font-size:16px;background:transparent;min-width:0;color:var(--ink)}
.search input::placeholder{color:#aaa}
.search button{border:0;background:transparent;color:#999;padding:0 16px;cursor:pointer;display:flex;align-items:center}

/* ===== drawer ===== */
.drawer-veil{position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:90;opacity:0;pointer-events:none;transition:.25s}
.drawer-veil.on{opacity:1;pointer-events:auto}
.drawer{position:fixed;top:0;left:0;bottom:0;width:min(82vw,320px);background:#fff;z-index:100;transform:translateX(-105%);transition:transform .3s;display:flex;flex-direction:column;padding-bottom:env(safe-area-inset-bottom)}
.drawer.open{transform:none}
.dr-head{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid var(--line)}
.dr-head img{height:40px}
.dr-close{width:36px;height:36px;border:0;border-radius:50%;background:#f1f1f1;font-size:26px;line-height:1;cursor:pointer;color:#333}
.dr-list{flex:1;overflow-y:auto;padding:8px 0}
.dr-list a{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;font-size:15px;font-weight:600;color:var(--ink-2);border-bottom:1px solid #f2f2f2}
.dr-list a.active{color:var(--red)}
.dr-list a .ar{color:#bbb;font-size:20px;line-height:1}
.dr-foot{padding:16px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:10px}
.dr-zalo{background:var(--red);color:#fff;text-align:center;padding:12px;border-radius:6px;font-weight:700}
.dr-call{background:#f1f1f1;text-align:center;padding:12px;border-radius:6px;font-weight:700}
.dr-foot small{color:var(--muted);font-size:12px;text-align:center}

/* ===== logo slider ===== */
.logo-slider{background:#fff;border-radius:var(--radius);position:relative;margin-bottom:12px}
.logo-slider .track{position:relative;height:300px}
.ls{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;padding:40px 60px 60px;opacity:0;visibility:hidden;transition:opacity .7s,visibility .7s}
.ls.on{opacity:1;visibility:visible}
.ls img{max-height:190px;max-width:100%;width:auto;object-fit:contain}
.logo-slider .dots{position:absolute;bottom:20px;left:0;right:0;display:flex;justify-content:center;gap:12px}
.logo-slider .dots span{width:70px;height:6px;border-radius:3px;background:#666;cursor:pointer;transition:.2s}
.logo-slider .dots span.on{background:#1d2333}

/* ===== hero Ossan (công nghệ) ===== */
.hero{position:relative;border-radius:14px;overflow:hidden;background:#05070f;color:#fff;margin-bottom:24px;min-height:460px;display:flex;flex-direction:column;justify-content:center;border:1px solid rgba(94,231,255,.18);box-shadow:0 0 0 1px rgba(255,255,255,.03),0 20px 60px rgba(0,0,0,.35)}
.hero-bg{position:absolute;inset:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;object-position:right center;display:block}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(5,7,15,.94) 0%,rgba(5,7,15,.8) 36%,rgba(5,7,15,.08) 62%);z-index:1}
.hero-grid{position:absolute;inset:0;z-index:1;pointer-events:none;opacity:.35;background-image:linear-gradient(rgba(94,231,255,.12) 1px,transparent 1px),linear-gradient(90deg,rgba(94,231,255,.12) 1px,transparent 1px);background-size:44px 44px;mask-image:linear-gradient(90deg,#000 0,transparent 60%);-webkit-mask-image:linear-gradient(90deg,#000 0,transparent 60%)}
.hero-beam{position:absolute;left:-30%;top:0;bottom:0;width:30%;z-index:1;pointer-events:none;background:linear-gradient(90deg,transparent,rgba(94,231,255,.10),transparent);animation:beam 6s linear infinite}
@keyframes beam{to{left:130%}}
.hero-in{position:relative;z-index:2;padding:40px 48px 24px;max-width:600px}
.hero-top{display:flex;align-items:center;gap:14px;margin-bottom:22px;flex-wrap:wrap}
.hero-brand img{height:40px;width:auto;background:#fff;border-radius:8px;padding:6px 10px}
.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:11.5px;font-weight:700;letter-spacing:2px;color:#5EE7FF;text-transform:uppercase}
.hero-eyebrow i{width:8px;height:8px;border-radius:50%;background:#5EE7FF;box-shadow:0 0 10px #5EE7FF;animation:pulse 1.8s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.4;transform:scale(.7)}}
.hero-h{margin:0 0 12px;font-size:50px;line-height:1.05;font-weight:800;letter-spacing:-.8px;color:#fff}
.hero-h span{background:linear-gradient(90deg,#5EE7FF,#8FB4FF);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-p{margin:0 0 18px;font-size:16px;line-height:1.6;color:#b8c4dc}
.hero-spec{list-style:none;margin:0 0 24px;padding:0;display:flex;gap:10px;flex-wrap:wrap}
.hero-spec li{border:1px solid rgba(94,231,255,.35);border-left:3px solid #5EE7FF;background:rgba(94,231,255,.06);padding:8px 14px;border-radius:6px;font-size:12.5px;color:#c7d2e6;display:flex;flex-direction:column;line-height:1.25;min-width:110px}
.hero-spec b{font-size:16px;color:#fff;font-weight:800;letter-spacing:.2px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}
.btn-red,.btn-ghost{display:inline-flex;align-items:center;gap:8px;padding:13px 24px;border-radius:8px;font-weight:700;font-size:15px;transition:.2s}
.btn-red{background:linear-gradient(135deg,#ff2d43,#e30613);color:#fff;box-shadow:0 8px 28px rgba(227,6,19,.45)}
.btn-red:hover{transform:translateY(-1px);box-shadow:0 12px 32px rgba(227,6,19,.55)}
.btn-red span{transition:.2s}.btn-red:hover span{transform:translateX(3px)}
.btn-ghost{border:1.5px solid rgba(94,231,255,.5);color:#fff;backdrop-filter:blur(6px);background:rgba(255,255,255,.03)}
.btn-ghost:hover{border-color:#5EE7FF;color:#5EE7FF;box-shadow:0 0 18px rgba(94,231,255,.25)}
.hero-space{display:none}
.perks{position:relative;z-index:2;list-style:none;margin:0;padding:0 48px 24px;display:flex;gap:10px;flex-wrap:wrap}
.perks li{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);backdrop-filter:blur(8px);border-radius:999px;padding:8px 14px;font-size:13px;font-weight:600;color:#e8eefc;display:flex;align-items:center;gap:8px;white-space:nowrap}
.perks b{color:#5EE7FF;font-size:12px}
@media (max-width:760px){
  .hero{min-height:0;justify-content:flex-start;border-radius:12px}
  .hero-bg img{object-position:center 58%}
  .hero::before{background:linear-gradient(180deg,rgba(5,7,15,.92) 0%,rgba(5,7,15,.78) 42%,rgba(5,7,15,0) 60%,rgba(5,7,15,.2) 88%,rgba(5,7,15,.9) 100%)}
  .hero-grid{mask-image:linear-gradient(180deg,#000 0,transparent 55%);-webkit-mask-image:linear-gradient(180deg,#000 0,transparent 55%)}
  .hero-in{padding:22px 18px 0;max-width:none;text-align:center}
  .hero-top{justify-content:center;gap:10px;margin-bottom:14px}
  .hero-brand img{height:32px}
  .hero-eyebrow{font-size:10px;letter-spacing:1.5px}
  .hero-h{font-size:34px}
  .hero-p{font-size:12.5px;margin-bottom:14px;white-space:nowrap;letter-spacing:-.1px}
  .hero-spec{justify-content:center;gap:6px;margin-bottom:16px}
  .hero-spec li{min-width:0;padding:6px 10px;font-size:11px}
  .hero-spec b{font-size:14px}
  .hero-cta{justify-content:center}
  .btn-red,.btn-ghost{padding:11px 18px;font-size:14px}
  .hero-space{display:block;height:300px}
  .perks{padding:0 12px 14px;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;gap:8px;justify-content:flex-start}
  .perks::-webkit-scrollbar{display:none}
  .perks li{font-size:12px;padding:7px 12px;flex:0 0 auto}
}

/* ===== small banners ===== */
.banners{background:#fff;border-radius:var(--radius);padding:8px;display:flex;gap:8px;margin-bottom:24px}
.banners a{flex:0 0 auto;width:calc(33.333% - 6px);border-radius:6px;overflow:hidden}
.banners img{width:100%;aspect-ratio:2/1;object-fit:cover}

/* ===== block (khu sản phẩm) ===== */
.block{background:#fff;border-radius:var(--radius);padding:20px 16px 24px;margin-bottom:24px}
.block-head{display:flex;align-items:center;justify-content:space-between;border-bottom:2px solid var(--red);padding-bottom:12px;margin-bottom:18px;gap:12px}
.block-head h2{margin:0;color:var(--red);font-size:22px;font-weight:700;text-transform:uppercase;letter-spacing:.2px}
.block-head .arrow{width:46px;height:34px;background:#222;color:#fff;border-radius:6px;display:flex;align-items:center;justify-content:center;font-size:22px;line-height:1;flex-shrink:0}
.block-head .arrow:hover{background:var(--red)}
.block-head .count{color:var(--muted);font-size:14px}
.grid{display:grid;grid-template-columns:repeat(5,1fr);gap:20px 16px}
.card{display:flex;flex-direction:column;gap:6px}
.card .thumb{aspect-ratio:1;display:flex;align-items:center;justify-content:center;overflow:hidden;background:#fff}
.card .thumb img{width:100%;height:100%;object-fit:contain;transition:.3s}
.card:hover .thumb img{transform:scale(1.04)}
.card .name{font-size:15px;line-height:1.4;color:var(--ink);font-weight:500;text-align:center;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card .price{color:var(--red);font-weight:700;font-size:16px;text-align:center}
.empty{color:var(--muted);text-align:center;padding:30px 0}

.brands .row{display:flex;gap:40px;align-items:center;justify-content:center;flex-wrap:wrap;padding:6px 0}
.brands img{height:44px;width:auto;opacity:.85}

/* ===== product detail ===== */
.crumb{font-size:13px;color:var(--muted);margin:0 0 14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.crumb a{color:var(--red)}
.pd{display:grid;grid-template-columns:440px 1fr;gap:32px;background:#fff;border-radius:var(--radius);padding:24px;margin-bottom:24px}
.pd .gallery,.pd .info{min-width:0}
.pd .big{aspect-ratio:1;width:100%;display:flex;align-items:center;justify-content:center;overflow:hidden;border:1px solid var(--line);border-radius:8px;padding:12px}
.pd .big img{max-width:100%;max-height:100%;width:auto;height:auto;object-fit:contain}
.pd .thumbs{display:flex;gap:8px;margin-top:12px;overflow-x:auto;scrollbar-width:none}
.pd .thumbs img{width:64px;height:64px;flex:0 0 auto;object-fit:contain;border:1px solid var(--line);border-radius:6px;cursor:pointer;padding:4px}
.pd .thumbs img:hover{border-color:var(--red)}
.pd h1{font-size:24px;margin:0 0 12px;line-height:1.3;font-weight:700}
.pd .meta{display:flex;gap:10px;flex-wrap:wrap;margin:10px 0;font-size:14px;align-items:center}
.badge{background:#f1f1f1;color:#333;font-size:12.5px;padding:4px 10px;border-radius:4px;font-weight:600}
.pd .price{color:var(--red);font-size:30px;font-weight:700;margin:12px 0 16px}
.pd .variants{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0 16px}
.pd .variants span{border:1px solid #ccc;padding:7px 14px;border-radius:6px;font-size:14px}
.pd .buy{display:block;background:var(--red);color:#fff;padding:14px;font-size:16px;border-radius:6px;font-weight:700;text-align:center;max-width:360px}
.pd .buy:hover{background:var(--red-d)}
.callline{margin-top:12px;color:var(--muted);font-size:14px}
.callline b{color:var(--red)}
.soft{margin-top:18px;line-height:1.7;color:#444}
.desc-body{line-height:1.8;overflow-wrap:anywhere}
.desc-body img{height:auto;margin:10px auto}
.desc-body table{display:block;overflow-x:auto}
.desc-body ul{padding-left:22px}

/* ===== footer ===== */
.footer{background:#fff;border-top:1px solid var(--line);color:#555;padding:36px 0 20px;font-size:14px}
.footer .cols{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:30px}
.footer h4{color:var(--ink);margin:0 0 12px;font-size:15px;font-weight:700}
.footer p{margin:6px 0}
.footer a{display:block;padding:4px 0;color:#555}
.footer a:hover{color:var(--red)}
.footer .logo-f img{height:44px;margin-bottom:12px}
.footer .socials{display:flex;gap:10px}
.footer .soc{width:40px;height:40px;border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:18px;padding:0}
.footer .bottom{border-top:1px solid var(--line);margin-top:26px;padding-top:16px;text-align:center;font-size:13px;color:#888}

/* ===== admin (kept) ===== */
.a-wrap{display:flex;min-height:100vh}
.a-side{width:222px;background:#0f1015;color:#cfd3e0;flex-shrink:0}
.a-side .brand{padding:18px;font-size:20px;font-weight:800;color:#fff;border-bottom:1px solid #24262e}
.a-side a{display:block;padding:12px 18px;color:#cfd3e0}
.a-side a:hover,.a-side a.active{background:var(--grad);color:#fff}
.a-main{flex:1;background:#f0f2f5;min-width:0}
.a-top{background:#fff;padding:14px 22px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #e3e6ea}
.a-body{padding:22px}
.a-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:22px}
.a-card{background:#fff;border-radius:14px;padding:18px;box-shadow:var(--shadow)}
.a-card .n{font-size:30px;font-weight:800;color:var(--red-d)}
.a-card .l{color:var(--muted);font-size:14px}
table{width:100%;border-collapse:collapse;background:#fff;border-radius:14px;overflow:hidden;box-shadow:var(--shadow)}
th,td{padding:11px 13px;text-align:left;border-bottom:1px solid #eee;font-size:14px;vertical-align:middle}
th{background:#fafafa;color:#555}
.btn{display:inline-block;background:var(--grad);color:#fff;border:0;padding:10px 18px;border-radius:10px;cursor:pointer;font-size:14px;text-align:center;font-weight:600}
.btn:hover{filter:brightness(1.05)}
.btn.gray{background:#6b7280}.btn.sm{padding:5px 10px;font-size:13px}
.field{margin-bottom:14px}
.field label{display:block;font-weight:600;margin-bottom:5px;font-size:14px}
.field input[type=text],.field input[type=number],.field textarea,.field select{width:100%;padding:10px 12px;border:1px solid #ccc;border-radius:10px;font-size:14px;font-family:inherit}
.field textarea{min-height:90px}
.login-box{max-width:380px;margin:8vh auto;background:#fff;padding:34px;border-radius:18px;box-shadow:0 12px 44px rgba(0,0,0,.16)}
.pill{padding:3px 10px;border-radius:20px;font-size:12px}
.pill.on{background:#d1fae5;color:#065f46}.pill.off{background:#fee2e2;color:#991b1b}

/* ===== responsive ===== */
@media(max-width:1100px){.grid{grid-template-columns:repeat(4,1fr)}}
@media(max-width:900px){
  .grid{grid-template-columns:repeat(3,1fr)}
  .header{position:static}
  .dnav{display:none}
  .burger{display:flex}
  .hrow{justify-content:space-between}
  .logo{position:absolute;left:50%;transform:translateX(-50%)}
  .hrow{position:relative}
  .pd{grid-template-columns:1fr;gap:20px;padding:16px}
  .footer .cols{grid-template-columns:1fr 1fr}
  .a-cards{grid-template-columns:repeat(2,1fr)}
  .banners a{width:calc(50% - 4px)}
}
@media(max-width:600px){
  .container{padding:0 12px}
  .page{padding-top:14px}
  .logo img{height:50px}
  .search{height:44px}
  .search input{font-size:16px}
  .logo-slider .track{height:250px}
  .ls{padding:30px 40px 50px}
  .ls img{max-height:140px}
  .logo-slider .dots span{width:56px;height:5px}
  .banners a{width:calc(50% - 4px)}
  .block{padding:16px 14px 20px;margin-bottom:16px}
  .block-head h2{font-size:19px}
  .grid{grid-template-columns:repeat(2,1fr);gap:18px 12px}
  .card .name{font-size:14px}
  .card .price{font-size:15px}
  .pd h1{font-size:19px}
  .pd .price{font-size:24px}
  .pd .buy{max-width:none}
  .footer .cols{grid-template-columns:1fr;gap:22px}
  .brands .row{gap:24px}.brands img{height:34px}
}