:root{
  --paper:#F5EEDF; --paper-2:#EDE3CC; --card:#FCF9F0;
  --ink:#24312A; --ink-soft:#5A6458; --ink-faint:#8A8F80;
  --green:#245F44; --green-d:#1A4632; --green-l:#3E8A5E;
  --head:#1A4632; --deep:#1A4632; --link:#245F44;
  --gold:#B4832B; --gold-l:#E0A93C; --terra:#B76E37; --red:#A8402F;
  --line:rgba(36,49,42,.14);
  --shadow:0 12px 32px rgba(90,70,30,.12);
  --top-bg:rgba(245,238,223,.92); --field:#fff; --tint:rgba(36,95,68,.09);
  --err-bg:#F7E1DA; --ok-bg:#DDEEDF; --foot:#1C2A22;
  --r:14px;
  --serif:'Lora',Georgia,serif; --sans:'Be Vietnam Pro',system-ui,sans-serif;
  color-scheme:light;
}
/* Chế độ đêm: theo máy (nếu chưa chọn) hoặc theo nút bật/tắt */
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --paper:#121815; --paper-2:#18201B; --card:#1D2621;
    --ink:#E9E5D9; --ink-soft:#B3B8AB; --ink-faint:#878D82;
    --green:#2E7A55; --green-l:#5FAE82; --head:#D6EADB; --deep:#0E1F17; --link:#8FCFA8;
    --gold:#C99636; --terra:#DA9465; --red:#E48A76;
    --line:rgba(233,229,217,.13); --shadow:0 12px 32px rgba(0,0,0,.45);
    --top-bg:rgba(18,24,21,.9); --field:#141B17; --tint:rgba(127,194,155,.13);
    --err-bg:#3A221C; --ok-bg:#1D3326; --foot:#0B100D;
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --paper:#121815; --paper-2:#18201B; --card:#1D2621;
  --ink:#E9E5D9; --ink-soft:#B3B8AB; --ink-faint:#878D82;
  --green:#2E7A55; --green-l:#5FAE82; --head:#D6EADB; --deep:#0E1F17; --link:#8FCFA8;
  --gold:#C99636; --terra:#DA9465; --red:#E48A76;
  --line:rgba(233,229,217,.13); --shadow:0 12px 32px rgba(0,0,0,.45);
  --top-bg:rgba(18,24,21,.9); --field:#141B17; --tint:rgba(127,194,155,.13);
  --err-bg:#3A221C; --ok-bg:#1D3326; --foot:#0B100D;
  color-scheme:dark;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.65 var(--sans)}
img{max-width:100%;height:auto;display:block}
a{color:var(--link)}
h1,h2,h3{font-family:var(--serif);line-height:1.2;margin:0 0 .5em;color:var(--head);font-weight:600}
h1{font-size:clamp(2.1rem,5vw,3.6rem);letter-spacing:-.01em}
h2{font-size:clamp(1.6rem,3.4vw,2.4rem)}
h3{font-size:1.2rem}
p{margin:0 0 1em}
.wrap{max-width:1160px;margin:0 auto;padding:0 20px}
.eyebrow{font:600 .78rem/1 var(--sans);letter-spacing:.14em;text-transform:uppercase;color:var(--terra);margin-bottom:.9rem;display:block}
.muted{color:var(--ink-soft)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5em;padding:.8em 1.4em;border-radius:999px;border:1.5px solid var(--green);background:var(--green);color:#fff;font:600 .95rem var(--sans);text-decoration:none;cursor:pointer;transition:background .15s,transform .15s}
.btn:hover{background:var(--deep);border-color:var(--deep)}
.btn:active{transform:translateY(1px)}
.btn.ghost{background:transparent;color:var(--link);border-color:var(--link)}
.btn.ghost:hover{background:var(--tint)}
.btn.gold{background:var(--gold);border-color:var(--gold)}
.btn.gold:hover{background:#9c7022}
.btn.sm{padding:.5em 1em;font-size:.85rem}
.btn[disabled]{opacity:.55;cursor:not-allowed}

/* Header */
.top{position:sticky;top:0;z-index:30;background:var(--top-bg);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:20px;height:68px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--head)}
.brand img{width:42px;height:42px}
.brand b{font:700 1.15rem/1 var(--serif);display:block}
.brand small{font:600 .68rem/1 var(--sans);letter-spacing:.3em;color:var(--terra)}
.nav{display:flex;gap:4px;margin-left:auto}
.nav a{padding:.5em .8em;border-radius:8px;text-decoration:none;color:var(--ink);font-weight:500;font-size:.94rem}
.nav a:hover,.nav a.on{background:var(--tint);color:var(--head)}
.cart-btn{position:relative;margin-left:8px}
.cart-btn .n{position:absolute;top:-6px;right:-6px;min-width:20px;height:20px;border-radius:10px;background:var(--terra);color:#fff;font:700 .72rem/20px var(--sans);text-align:center;padding:0 5px}
.cart-btn .n:empty,.cart-btn .n[data-n="0"]{display:none}
.burger{display:none;background:none;border:0;padding:8px;cursor:pointer;color:var(--ink)}
@media (max-width:860px){
  .nav{position:fixed;inset:68px 0 auto 0;flex-direction:column;background:var(--paper);padding:10px 16px 18px;border-bottom:1px solid var(--line);display:none}
  .nav.open{display:flex}
  .burger{display:block;margin-left:auto}
  .cart-btn{margin-left:0}
}

/* Hero */
.hero{padding:56px 0 40px}
.hero .wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero .lead{font-size:1.12rem;color:var(--ink-soft);max-width:34em}
.hero .quote{font:italic 500 1.05rem var(--serif);color:var(--terra);margin-bottom:.8rem}
.hero .ctas{display:flex;gap:12px;flex-wrap:wrap;margin:24px 0}
.hero figure{margin:0;position:relative}
.hero figure img{border-radius:22px;box-shadow:var(--shadow);aspect-ratio:4/5;object-fit:cover;width:100%}
.hero figure figcaption{position:absolute;left:-18px;bottom:28px;background:var(--card);padding:12px 16px;border-radius:12px;box-shadow:var(--shadow);font-size:.88rem;max-width:230px}
.hero figure figcaption b{display:block;font-family:var(--serif);color:var(--head);font-size:1.05rem}
.badges{display:flex;flex-wrap:wrap;gap:8px;padding:0;margin:0;list-style:none}
.badges li{background:var(--card);border:1px solid var(--line);border-radius:999px;padding:.35em .9em;font-size:.86rem;font-weight:500}
@media (max-width:860px){.hero .wrap{grid-template-columns:1fr;gap:28px}.hero figure figcaption{left:12px}}

section{padding:64px 0}
section.alt{background:var(--paper-2)}
.head{max-width:680px;margin-bottom:32px}

/* Products */
.filters{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:22px}
.chip{border:1.5px solid var(--line);background:var(--card);border-radius:999px;padding:.42em 1em;font:500 .9rem var(--sans);cursor:pointer;color:var(--ink)}
.chip.on{background:var(--green);border-color:var(--green);color:#fff}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:20px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;display:flex;flex-direction:column}
.card .ph{aspect-ratio:4/3;overflow:hidden;background:var(--paper-2);position:relative}
.card .ph img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.card:hover .ph img{transform:scale(1.04)}
.card .tag{position:absolute;top:10px;left:10px;background:var(--card);border-radius:999px;padding:.2em .7em;font-size:.75rem;font-weight:600;color:var(--head)}
.card .tag.out{color:var(--terra)}
.card .bd{padding:16px;display:flex;flex-direction:column;gap:10px;flex:1}
.card h3{margin:0;font-size:1.08rem}
.card .sz{font-size:.82rem;color:var(--ink-faint);font-weight:500}
.card .ds{font-size:.9rem;color:var(--ink-soft);margin:0}
.vars{display:flex;gap:6px;flex-wrap:wrap}
.vars button{border:1.5px solid var(--line);background:transparent;border-radius:8px;padding:.3em .7em;font:500 .82rem var(--sans);cursor:pointer;color:var(--ink)}
.vars button.on{border-color:var(--green);background:var(--tint);color:var(--head)}
.buy{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:auto}
.price{font:700 1.2rem var(--serif);color:var(--head)}
.price small{font:500 .78rem var(--sans);color:var(--ink-faint);display:block}
.qty{display:inline-flex;align-items:center;border:1.5px solid var(--line);border-radius:999px;overflow:hidden}
.qty button{width:32px;height:32px;border:0;background:none;font-size:1.1rem;cursor:pointer;color:var(--ink)}
.qty input{width:38px;text-align:center;border:0;background:none;font:600 .95rem var(--sans);color:var(--ink);-moz-appearance:textfield}
.qty input::-webkit-inner-spin-button{-webkit-appearance:none}
.skeleton{height:380px;border-radius:var(--r);background:linear-gradient(90deg,var(--paper-2),var(--card),var(--paper-2));background-size:200% 100%;animation:sk 1.4s infinite}
@keyframes sk{to{background-position:-200% 0}}

/* Story / features */
.two{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.two img{border-radius:20px;aspect-ratio:4/5;object-fit:cover;width:100%}
@media (max-width:860px){.two{grid-template-columns:1fr;gap:24px}}
.feats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.feat{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:20px}
.feat .ic{width:42px;height:42px;border-radius:12px;background:var(--tint);display:grid;place-items:center;color:var(--green);margin-bottom:12px}
.feat h3{font-size:1.02rem;margin-bottom:.3em}
.feat p{font-size:.9rem;color:var(--ink-soft);margin:0}
@media (max-width:900px){.feats{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.feats{grid-template-columns:1fr}}
.specs{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:18px}
.specs div{border-left:3px solid var(--gold);padding:4px 0 4px 12px}
.specs b{display:block;font:700 1.35rem var(--serif);color:var(--head)}
.specs span{font-size:.85rem;color:var(--ink-soft)}

/* B2B */
.b2b{background:var(--deep);color:#EAF1EA;border-radius:24px;padding:40px;display:grid;grid-template-columns:1fr 1fr;gap:36px}
.b2b h2,.b2b h3{color:#fff}
.b2b .eyebrow{color:var(--gold-l)}
.b2b ul{padding-left:1.1em;margin:0 0 1em}
.b2b li{margin-bottom:.35em}
.b2b form{background:var(--card);color:var(--ink);border-radius:16px;padding:22px}
@media (max-width:860px){.b2b{grid-template-columns:1fr;padding:26px 20px}}

/* Forms */
.f{display:grid;gap:12px}
.f label{display:grid;gap:4px;font-size:.86rem;font-weight:600;color:var(--ink-soft)}
.f input,.f textarea,.f select{font:400 1rem var(--sans);padding:.65em .8em;border:1.5px solid var(--line);border-radius:10px;background:var(--field);color:var(--ink);width:100%}
.f input:focus,.f textarea:focus,.f select:focus{outline:2px solid var(--green-l);outline-offset:0;border-color:transparent}
.f .row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media (max-width:520px){.f .row{grid-template-columns:1fr}}
.hp{position:absolute!important;left:-9999px!important}
.msg{font-size:.9rem;padding:.6em .8em;border-radius:8px;display:none}
.msg.err{display:block;background:var(--err-bg);color:var(--red)}
.msg.ok{display:block;background:var(--ok-bg);color:var(--head)}

/* News */
.news{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.post{background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;text-decoration:none;color:inherit;display:flex;flex-direction:column}
.post img{aspect-ratio:16/10;object-fit:cover;width:100%;background:var(--paper-2)}
.post .bd{padding:16px}
.post time{font-size:.8rem;color:var(--ink-faint);font-weight:500}
.post h3{margin:.3em 0 .4em;font-size:1.08rem}
.post p{font-size:.9rem;color:var(--ink-soft);margin:0}
.post:hover h3{color:var(--green)}
@media (max-width:860px){.news{grid-template-columns:1fr}}
.empty{padding:28px;border:1.5px dashed var(--line);border-radius:var(--r);text-align:center;color:var(--ink-soft)}

/* FAQ */
.faq details{border-bottom:1px solid var(--line);padding:14px 0}
.faq summary{cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:12px}
.faq summary::after{content:'+';font-size:1.3rem;line-height:1;color:var(--green)}
.faq details[open] summary::after{content:'–'}
.faq details p{margin:.6em 0 0;color:var(--ink-soft)}

/* Footer */
footer{background:var(--foot);color:#C9D3C8;padding:48px 0 28px;font-size:.92rem}
footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px}
footer h4{color:#fff;font:600 1rem var(--serif);margin:0 0 .7em}
footer a{color:#E0C98F}
footer .copy{border-top:1px solid rgba(255,255,255,.1);margin-top:32px;padding-top:18px;font-size:.82rem;color:#8E9A8D}
@media (max-width:760px){footer .cols{grid-template-columns:1fr}}

/* Cart drawer */
.ov{position:fixed;inset:0;background:rgba(20,28,22,.45);z-index:40;opacity:0;pointer-events:none;transition:opacity .2s}
.ov.open{opacity:1;pointer-events:auto}
.drawer{position:fixed;top:0;right:0;bottom:0;width:min(440px,100%);background:var(--paper);z-index:41;transform:translateX(100%);transition:transform .25s;display:flex;flex-direction:column}
.drawer.open{transform:none}
.drawer header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--line)}
.drawer header h3{margin:0}
.drawer .x{background:none;border:0;font-size:1.6rem;cursor:pointer;color:var(--ink);line-height:1}
.drawer .body{flex:1;overflow:auto;padding:16px 20px}
.line{display:grid;grid-template-columns:56px 1fr auto;gap:12px;align-items:center;padding:10px 0;border-bottom:1px solid var(--line)}
.line img{width:56px;height:56px;border-radius:8px;object-fit:cover}
.line b{display:block;font-size:.92rem}
.line span{font-size:.82rem;color:var(--ink-soft)}
.line .rm{background:none;border:0;color:var(--ink-faint);cursor:pointer;font-size:.8rem;text-decoration:underline;padding:0}
.total{display:flex;justify-content:space-between;font:700 1.15rem var(--serif);color:var(--head);margin:14px 0}
.done{text-align:center;padding:30px 10px}
.done .code{font:700 1.6rem var(--serif);color:var(--head);background:var(--card);border:1.5px dashed var(--gold);border-radius:12px;padding:10px;margin:14px 0}

/* Floating Zalo */
.fab{position:fixed;right:18px;bottom:18px;z-index:25;display:flex;align-items:center;gap:8px;background:#0068FF;color:#fff;text-decoration:none;font-weight:600;padding:.7em 1.1em;border-radius:999px;box-shadow:0 8px 22px rgba(0,104,255,.35)}

/* Article */
.article{max-width:740px;margin:0 auto;padding:40px 20px 64px}
.article .meta{color:var(--ink-faint);font-size:.9rem;margin-bottom:1.4em}
.article img{border-radius:14px;margin:1.2em 0}
.article .body{font-size:1.06rem}
.article .body h2{font-size:1.5rem;margin-top:1.4em}
.crumb{font-size:.88rem;margin-bottom:1em}
.crumb a{text-decoration:none}
@media (max-width:560px){
  .card .ph{aspect-ratio:16/10}
  .fab{padding:.8em;bottom:14px;right:14px}
  .fab span{display:none}
  section{padding:48px 0}
}

/* Nút chế độ đêm & ngôn ngữ */
.tools-top{display:flex;align-items:center;gap:6px;margin-left:8px}
.icon-btn{width:38px;height:38px;border-radius:999px;border:1.5px solid var(--line);background:var(--card);color:var(--ink);display:grid;place-items:center;cursor:pointer;text-decoration:none;font:700 .78rem var(--sans)}
.icon-btn:hover{border-color:var(--green-l)}
.icon-btn .moon{display:block}.icon-btn .sun{display:none}
:root[data-theme="dark"] .icon-btn .moon{display:none}
:root[data-theme="dark"] .icon-btn .sun{display:block}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]) .icon-btn .moon{display:none}
  :root:not([data-theme="light"]) .icon-btn .sun{display:block}
}
.feat .ic{color:var(--green-l)}
@media (max-width:860px){.tools-top{margin-left:0}}
@media (max-width:560px){
  .top .wrap{gap:8px}
  .brand img{width:36px;height:36px}
  .brand b{font-size:1rem}
  .cart-btn .lbl{display:none}
  .cart-btn{padding:.55em .75em}
  .icon-btn{width:34px;height:34px}
}