:root{
  --red:#EE2D24;--red-deep:#D9221A;--orange:#FF9419;
  --ink:#2B2B2B;--muted:#6B6B6B;--bg:#FFFFFF;--surface:#F7F7F7;--tile:#F8F8F8;--line:#E8E8E8;
  --ill-line:#5E5E5E;--ill-soft:#FFFFFF;--ill-shadow:rgba(0,0,0,.08);
  --on-red:#FFFFFF;
  color-scheme:light;
  box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px);
  padding-bottom:env(safe-area-inset-bottom,0px);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-padding-top:calc(env(safe-area-inset-top,0px) + 70px);-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:'Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;font-size:16px;line-height:1.55}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:3px solid var(--orange);outline-offset:2px;border-radius:4px}
.wrap{max-width:1220px;margin:0 auto;padding:0 20px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* top + header */
.topbar{background:var(--surface);color:var(--muted);font-size:13px;border-bottom:1px solid var(--line)}
.topbar .wrap{display:flex;gap:18px;justify-content:space-between;align-items:center;min-height:34px;flex-wrap:wrap}
.topbar nav{display:flex;gap:18px}
.topbar a:hover{text-decoration:underline}
.header{background:var(--bg);color:var(--ink)}
.header .wrap{display:flex;align-items:center;gap:24px;min-height:84px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{width:44px;height:44px;border-radius:12px;background:var(--red);display:grid;place-items:center}
.logo-mark svg{width:30px;height:30px}
.logo b{display:block;color:var(--red);font-size:22px;font-weight:800;letter-spacing:-.02em;line-height:1.1}
.logo small{display:block;font-size:12px;color:var(--muted)}
.search{flex:1;display:flex;max-width:520px;background:#fff;border:2px solid var(--red);border-radius:10px;overflow:hidden}
.search input{flex:1;border:0;padding:12px 14px;color:#2B2220;background:#fff;min-width:0}
.search input:focus{outline:none}
.search:focus-within{outline:3px solid var(--orange)}
.search button{border:0;background:var(--red);color:#fff;padding:0 18px;cursor:pointer;font-weight:600}
.hotlines{display:flex;gap:18px;margin-left:auto}
.hotline{display:flex;align-items:center;gap:8px;line-height:1.2}
.hotline .ic{width:36px;height:36px;border-radius:50%;border:2px solid var(--red);color:var(--red);display:grid;place-items:center;flex-shrink:0}
.hotline small{display:block;font-size:12px;color:var(--muted)}
.hotline b{font-size:16px;font-weight:700;color:var(--red)}

.nav{position:sticky;top:env(safe-area-inset-top,0px);z-index:40;background:var(--bg);border-top:1px solid var(--line);border-bottom:1px solid var(--line);box-shadow:0 2px 0 rgba(0,0,0,.02)}
.nav .wrap{display:flex;align-items:stretch;gap:4px;min-height:52px;position:relative}
.cat-btn{display:flex;align-items:center;gap:10px;background:var(--red);color:#fff;border:0;padding:0 18px;font-weight:700;cursor:pointer;min-width:250px}
.cat-btn svg{width:18px;height:18px}
.nav-links{display:flex;align-items:center;gap:2px;overflow-x:auto;scrollbar-width:none}
.nav-links::-webkit-scrollbar{display:none}
.nav-links a{padding:14px 14px;font-weight:600;white-space:nowrap;border-radius:8px}
.nav-links a:hover,.nav-links a[aria-current="page"]{color:var(--red)}
.mega{position:absolute;left:20px;right:20px;top:100%;background:var(--bg);border:1px solid var(--line);border-top:3px solid var(--red);box-shadow:0 18px 40px rgba(0,0,0,.14);display:none;padding:22px;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:18px 26px;max-height:70vh;overflow:auto}
.mega.open{display:grid}
.mega h4{margin:0 0 6px;font-size:15px}
.mega h4 a{display:flex;align-items:center;gap:8px}
.mega h4 a:hover{color:var(--red)}
.mega h4 svg{width:30px;height:30px;flex-shrink:0;background:var(--tile);border-radius:8px}
.mega ul{list-style:none;margin:0;padding:0 0 0 38px}
.mega li a{display:block;padding:3px 0;color:var(--muted);font-size:14px}
.mega li a:hover{color:var(--red)}

/* hero */
.hero{background:var(--bg);color:var(--ink);overflow:hidden;position:relative;border-bottom:1px solid var(--line)}
.hero .btn-light{background:var(--red);color:#fff}
.hero .btn-light:hover{background:var(--red-deep)}
.hero .btn-ghost{border-color:var(--red);color:var(--red)}
.hero .btn-ghost:hover{background:#FDECEA}
.slides{display:grid}
.slide{grid-area:1/1;display:grid;grid-template-columns:1.1fr .9fr;align-items:center;gap:30px;min-height:400px;padding:40px 0 60px;opacity:0;visibility:hidden;transition:opacity .6s ease,visibility .6s}
.slide.on{opacity:1;visibility:visible}
.slide h1,.slide h2{font-size:clamp(30px,4.6vw,54px);line-height:1.08;letter-spacing:-.025em;font-weight:800;margin:0 0 16px;max-width:15ch}
.slide p{font-size:18px;max-width:46ch;margin:0 0 26px;color:var(--muted)}
.slide .art{position:relative;aspect-ratio:1;max-width:420px;justify-self:center;width:100%}
.slide .art::before{content:"";position:absolute;inset:6%;border-radius:50%;background:#FDEFEC}
.slide .art svg{position:relative;width:100%;height:100%}
.slide .tag{display:inline-block;background:var(--orange);color:#fff;font-weight:700;border-radius:999px;padding:5px 14px;font-size:14px;margin-bottom:16px}
.dots{position:absolute;bottom:22px;left:0;right:0}
.dots .wrap{display:flex;gap:8px}
.dots button{width:34px;height:6px;border-radius:3px;border:0;background:var(--line);cursor:pointer;padding:0}
.dots button[aria-current="true"]{background:var(--red)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 22px;border-radius:10px;font-weight:700;border:2px solid transparent;cursor:pointer;line-height:1.2;text-align:center}
.btn svg{width:18px;height:18px;flex-shrink:0}
.btn-light{background:#fff;color:var(--red-deep)}
.btn-ghost{border-color:rgba(255,255,255,.7);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn-red{background:var(--red);color:#fff}
.btn-red:hover{background:var(--red-deep)}
.btn-line{border-color:var(--line);background:var(--bg)}
.btn-line:hover{border-color:var(--ink)}
.btn-zalo{background:#0068FF;color:#fff}
.btn-row{display:flex;gap:12px;flex-wrap:wrap}

/* category strip */
.strip{background:var(--bg);border-bottom:1px solid var(--line)}
.strip .wrap{display:grid;grid-template-columns:repeat(10,1fr);gap:6px;padding-top:18px;padding-bottom:18px;overflow-x:auto}
.strip a{display:flex;flex-direction:column;align-items:center;gap:6px;text-align:center;font-size:13px;font-weight:600;padding:8px 4px;border-radius:12px;min-width:92px}
.strip a:hover{background:var(--surface);color:var(--red)}
.strip svg{width:64px;height:64px;background:var(--surface);border-radius:50%;padding:4px}

/* sections */
.sec{padding:44px 0 8px}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap;border-bottom:2px solid var(--line);margin-bottom:20px;padding-bottom:10px;position:relative}
.sec-head::after{content:"";position:absolute;left:0;bottom:-2px;width:90px;height:2px;background:var(--red)}
.sec-head h2{margin:0;font-size:clamp(22px,2.4vw,28px);letter-spacing:-.02em;line-height:1.2}
.chips{display:flex;gap:6px;flex-wrap:wrap}
.chips a{padding:6px 12px;border-radius:999px;border:1px solid var(--line);font-size:14px;font-weight:500}
.chips a:hover,.chips a[aria-current="true"]{border-color:var(--red);color:var(--red)}
.chips a[aria-current="true"]{background:var(--red);color:#fff}
.more{text-align:center;margin:22px 0 0}
.more a{display:inline-block;padding:10px 22px;border:1px solid var(--red);color:var(--red);border-radius:999px;font-weight:600}
.more a:hover{background:var(--red);color:#fff}

/* product cards */
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.card{display:flex;flex-direction:column;background:var(--bg);border:1px solid var(--line);border-radius:14px;overflow:hidden}
.card:hover{border-color:var(--red)}
.card:hover h3{color:var(--red)}
.card-img{position:relative;background:var(--tile);aspect-ratio:1}
.card-img svg{width:100%;height:100%}
.badge{position:absolute;top:10px;left:10px;background:var(--orange);color:#fff;font-weight:800;font-size:13px;padding:3px 9px;border-radius:6px}
.card-body{padding:12px 14px 16px;display:flex;flex-direction:column;gap:6px;flex:1}
.card h3{font-size:15px;font-weight:600;line-height:1.4;margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:2.8em}
.price{display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 10px;margin-top:auto}
.price strong{color:var(--red);font-size:17px;font-weight:800}
.price s{color:var(--muted);font-size:13px}
.size{font-size:13px;color:var(--muted);display:flex;align-items:center;gap:6px}
.size::before{content:"";width:14px;height:8px;border:2px solid currentColor;border-top:0;border-radius:0 0 2px 2px;opacity:.7}

/* why */
.why{background:var(--surface);margin-top:52px;padding:44px 0}
.why .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.why h3{margin:12px 0 6px;font-size:18px}
.why p{margin:0;color:var(--muted);font-size:15px}
.why .ic{width:52px;height:52px;border-radius:14px;background:#FDECEA;color:var(--red);display:grid;place-items:center}
.why .ic svg{width:28px;height:28px}

.split{display:grid;grid-template-columns:1fr 1fr;gap:40px;padding:48px 0}
.split h2{font-size:clamp(22px,2.4vw,28px);margin:0 0 12px;letter-spacing:-.02em}
.split p{color:var(--muted);max-width:60ch}
.mapbox{background:var(--surface);border-radius:16px;padding:24px;display:flex;flex-direction:column;gap:14px;min-height:240px;justify-content:center}
.mapbox .link{color:var(--red);font-weight:600}
.stores{padding:44px 0 8px}
.mapbox-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;min-height:0}
.mapbox .addr{display:flex;gap:12px;align-items:flex-start}
.mapbox .addr svg{width:22px;height:22px;color:var(--red);flex-shrink:0;margin-top:2px}

/* form */
.form{display:grid;gap:12px}
.form label{display:grid;gap:5px;font-weight:600;font-size:14px}
.form input,.form textarea,.form select{border:1px solid var(--line);background:var(--bg);border-radius:10px;padding:11px 12px;font-weight:400;width:100%}
.form input:focus,.form textarea:focus{outline:none;border-color:var(--red);box-shadow:0 0 0 3px rgba(214,38,28,.15)}
.form .two{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.form-status{font-size:14px;min-height:1.4em;margin:0}
.form-status.ok{color:#2E8B57}
.form-status.err{color:var(--red)}
dialog{border:0;border-radius:18px;padding:0;max-width:520px;width:calc(100% - 32px);background:var(--bg);color:var(--ink)}
dialog::backdrop{background:rgba(20,10,8,.55)}
.dlg-head{background:var(--red);color:#fff;padding:18px 22px;display:flex;justify-content:space-between;align-items:center;gap:12px}
.dlg-head h2{margin:0;font-size:20px}
.dlg-head button{background:transparent;border:0;color:#fff;font-size:26px;line-height:1;cursor:pointer;padding:4px 8px}
.dlg-body{padding:20px 22px 24px}
.dlg-body .note{font-size:14px;color:var(--muted);margin:0 0 14px}

/* page shared */
.crumbs{font-size:14px;color:var(--muted);padding:18px 0 4px;display:flex;flex-wrap:wrap;gap:6px}
.crumbs a:hover{color:var(--red)}
.crumbs span[aria-hidden]{opacity:.5}
.page-title{font-size:clamp(26px,3vw,36px);letter-spacing:-.02em;margin:6px 0 8px;line-height:1.15}
.lead{color:var(--muted);margin:0 0 20px;max-width:70ch}
.layout{display:grid;grid-template-columns:250px 1fr;gap:28px;padding-bottom:40px}
.side{border:1px solid var(--line);border-radius:14px;overflow:hidden;align-self:start;position:sticky;top:calc(env(safe-area-inset-top,0px) + 66px)}
.side h3{margin:0;padding:12px 16px;background:var(--surface);font-size:15px}
.side a{display:flex;align-items:center;gap:10px;padding:9px 16px;border-top:1px solid var(--line);font-size:14px;font-weight:500}
.side a svg{width:28px;height:28px;flex-shrink:0}
.side a:hover,.side a[aria-current="page"]{color:var(--red);background:var(--tile)}
.toolbar{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:16px}
.toolbar select{border:1px solid var(--line);border-radius:10px;padding:8px 10px;background:var(--bg)}
.layout .grid{grid-template-columns:repeat(3,1fr)}
.count{font-size:14px;color:var(--muted);margin:0 0 12px}
.toolbar .count{margin:0}
.pager{display:flex;justify-content:center;align-items:center;flex-wrap:wrap;gap:6px;margin:28px 0 8px}
.pager a,.pager span{min-width:42px;height:42px;padding:0 12px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:10px;font-weight:600;background:var(--bg)}
.pager a:hover{border-color:var(--red);color:var(--red)}
.pager a[aria-current="page"]{background:var(--red);border-color:var(--red);color:#fff}
.pager .off{color:var(--muted);opacity:.5}
.pager .gap{border:0;min-width:20px;padding:0}
.empty{padding:40px;text-align:center;border:1px dashed var(--line);border-radius:14px;color:var(--muted)}

/* product detail */
.pd{display:grid;grid-template-columns:1fr 1fr;gap:40px;padding:10px 0 30px}
.gallery-main{background:var(--tile);border-radius:18px;aspect-ratio:1;position:relative;overflow:hidden}
.gallery-main svg{width:100%;height:100%}
.thumbs{display:flex;gap:10px;margin-top:12px}
.thumbs button{width:84px;aspect-ratio:1;border-radius:12px;background:var(--tile);border:2px solid transparent;padding:0;cursor:pointer;overflow:hidden}
.thumbs button[aria-pressed="true"]{border-color:var(--red)}
.thumbs svg{width:100%;height:100%}
.pd h1{font-size:clamp(24px,2.6vw,32px);line-height:1.2;letter-spacing:-.02em;margin:0 0 10px}
.pd .sku{color:var(--muted);font-size:14px;margin:0 0 16px}
.pd .price-box{background:var(--surface);border-radius:14px;padding:16px 18px;margin-bottom:18px;display:flex;align-items:baseline;gap:6px 14px;flex-wrap:wrap}
.pd .price-box strong{font-size:30px;color:var(--red);font-weight:800;letter-spacing:-.02em}
.pd .price-box s{color:var(--muted)}
.pd .price-box .badge{position:static}
.pd .price-box small{flex-basis:100%;color:var(--muted);font-size:13px}
.perks{list-style:none;padding:0;margin:0 0 20px;display:grid;gap:8px}
.perks li{display:flex;gap:10px;align-items:center}
.perks svg{width:20px;height:20px;color:var(--red);flex-shrink:0}
.cta{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.cta .btn-red{grid-column:1/-1;font-size:17px;padding:15px}
.pd-info{border-top:1px solid var(--line);padding:30px 0;display:grid;grid-template-columns:1.3fr 1fr;gap:40px}
.pd-info h2{font-size:22px;margin:0 0 12px}
.pd-info p{color:var(--muted);max-width:65ch}
.specs{width:100%;border-collapse:collapse;font-size:15px}
.specs th,.specs td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
.specs th{width:40%;color:var(--muted);font-weight:500;background:var(--surface)}
.prose{max-width:72ch;padding-bottom:40px}
.prose h2{font-size:22px;margin:28px 0 8px}
.prose p,.prose li{color:var(--muted)}

/* footer */
footer{background:var(--bg);color:var(--ink);margin-top:40px;border-top:3px solid var(--red)}
footer .wrap{display:grid;grid-template-columns:1.4fr 1fr 1.2fr 1fr;gap:30px;padding-top:44px;padding-bottom:30px}
footer h3{color:var(--red-deep);font-size:16px;margin:0 0 12px}
footer ul{list-style:none;padding:0;margin:0;display:grid;gap:8px;font-size:14px}
footer a:hover{color:var(--red);text-decoration:underline}
footer p{font-size:14px;margin:0 0 10px;color:var(--muted)}
.foot-bottom{border-top:1px solid var(--line);font-size:13px;color:var(--muted);background:var(--surface)}
.foot-bottom .wrap{display:block;padding:16px 20px}
footer .logo-mark{background:var(--red)}

/* floating */
.float{position:fixed;right:16px;bottom:calc(18px + env(safe-area-inset-bottom,0px));display:flex;flex-direction:column;gap:10px;z-index:50}
.float a{width:52px;height:52px;border-radius:50%;display:grid;place-items:center;color:#fff;box-shadow:0 6px 18px rgba(0,0,0,.22);font-weight:800;font-size:13px}
.float svg{width:24px;height:24px}
.f-phone{background:var(--red)}
.f-zalo{background:#0068FF}
.f-mess{background:linear-gradient(135deg,#0A7CFF,#A033FF)}
@media (prefers-reduced-motion:no-preference){
  .f-phone{animation:ring 2.4s ease-in-out infinite}
  @keyframes ring{0%,80%,100%{transform:none}84%{transform:rotate(-12deg)}88%{transform:rotate(12deg)}92%{transform:rotate(-8deg)}96%{transform:rotate(6deg)}}
}
@media (prefers-reduced-motion:reduce){.slide{transition:none}}
.mbar{display:none}
.mega-pages{display:none}

/* responsive */
@media (max-width:1000px){
  .hotlines{display:none}
  .grid{grid-template-columns:repeat(3,1fr)}
  .layout{grid-template-columns:1fr}
  .side{display:none}
  .why .wrap{grid-template-columns:repeat(2,1fr)}
  footer .wrap{grid-template-columns:1fr 1fr}
  .strip .wrap{grid-template-columns:repeat(10,92px)}
}
@media (max-width:760px){
  .wrap{padding:0 14px}
  .topbar{display:none}
  .header .wrap{flex-wrap:wrap;gap:10px;padding-top:10px;padding-bottom:12px;min-height:0}
  .logo-mark{width:38px;height:38px;border-radius:10px}
  .logo b{font-size:19px}
  .logo small{display:none}
  .search{max-width:none;flex-basis:100%}
  .search input{padding:10px 12px;font-size:16px}
  .nav .wrap{padding:0;min-height:48px}
  .nav-links{display:none}
  .cat-btn{flex:1;justify-content:flex-start;min-width:0;padding:0 16px;background:var(--bg);color:var(--ink);border-bottom:0}
  .cat-btn[aria-expanded="true"]{color:var(--red)}
  .mega{position:absolute;left:0;right:0;top:100%;grid-template-columns:1fr;padding:0 0 16px;gap:0;border-left:0;border-right:0;
    max-height:calc(100dvh - 48px - 64px - env(safe-area-inset-top,0px) - env(safe-area-inset-bottom,0px));overscroll-behavior:contain}
  .mega-pages{display:grid;grid-template-columns:1fr 1fr;gap:8px;padding:14px 16px;background:var(--surface);border-bottom:1px solid var(--line)}
  .mega-pages a{padding:10px 12px;background:var(--bg);border:1px solid var(--line);border-radius:10px;font-weight:600;text-align:center}
  .mega>div:not(.mega-pages){padding:12px 16px 4px;border-bottom:1px solid var(--line)}
  .mega h4 a{padding:4px 0}
  .mega ul{padding-left:0;display:flex;flex-wrap:wrap;gap:6px;margin:6px 0 8px}
  .mega li a{padding:7px 12px;border:1px solid var(--line);border-radius:999px;color:var(--ink)}
  .slide{grid-template-columns:1fr;min-height:0;padding:20px 0 50px;gap:0}
  .slide .art{max-width:180px;order:-1;margin-bottom:4px}
  .slide .btn-row .btn{flex:1}
  .strip svg{width:54px;height:54px}
  .why{margin-top:36px;padding:32px 0}
  .why .wrap{gap:18px}
  .sec{padding:30px 0 4px}
  .float{display:none}
  body{padding-bottom:calc(64px + env(safe-area-inset-bottom,0px))}
  .mbar{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;left:0;right:0;bottom:0;z-index:60;background:var(--bg);
    border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom,0px);box-shadow:0 -4px 16px rgba(0,0,0,.08)}
  .mbar a,.mbar button{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;height:64px;font-size:12px;font-weight:700;border:0;background:none;cursor:pointer;padding:0}
  .mbar svg{width:22px;height:22px}
  .mbar .m-phone{color:var(--red)}
  .mbar .m-zalo{color:#0068FF}
  .mbar .m-zalo b{font-size:13px;border:2px solid currentColor;border-radius:7px;padding:0 4px;line-height:18px}
  .mbar .m-mess{color:#7A3CF0}
  .mbar .m-quote{background:var(--red);color:#fff}
  .cta .btn{padding:12px 10px;font-size:15px}
  .pager a,.pager span{min-width:40px;height:40px;padding:0 10px}
  dialog{max-height:calc(100dvh - 24px);overflow:auto}
  .slide p{font-size:16px}
  .grid,.layout .grid{grid-template-columns:repeat(2,1fr);gap:10px}
  .card-body{padding:10px 10px 12px}
  .card h3{font-size:14px}
  .price strong{font-size:15px}
  .split,.pd,.pd-info{grid-template-columns:1fr;gap:24px}
  .form .two{grid-template-columns:1fr}
  footer .wrap{grid-template-columns:1fr}
  .thumbs button{width:70px}
}