:root{
  --ink:#14202b; --muted:#66788a; --bg:#f7f8fa; --card:#ffffff;
  --accent:#f97316; --accent-d:#ea6a0a; --teal:#0f766e;
  --line:#e7ecf1; --radius:14px; --shadow:0 6px 24px rgba(20,32,43,.08);
}
*{box-sizing:border-box; -webkit-tap-highlight-color:transparent;}
html{scroll-behavior:smooth;}
body{margin:0; font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif; background:var(--bg); color:var(--ink); line-height:1.55;}
img{display:block; max-width:100%;}
a{color:inherit;}

/* header */
.site-header{position:sticky; top:0; z-index:50; background:rgba(255,255,255,.92); backdrop-filter:blur(10px); border-bottom:1px solid var(--line);}
.header-inner{max-width:1100px; margin:0 auto; padding:10px 16px; display:flex; align-items:center; justify-content:space-between;}
.logo{font-weight:800; font-size:22px; letter-spacing:.5px; text-decoration:none;}
.logo-sub{font-weight:600; font-size:13px; color:var(--teal); margin-left:6px; letter-spacing:2px; text-transform:uppercase;}
.header-actions{display:flex; gap:10px; align-items:center;}
.lang-toggle{border:1px solid var(--line); background:#fff; border-radius:999px; padding:8px 14px; font-size:14px; font-weight:600; cursor:pointer; min-height:40px;}
.cart-btn{position:relative; border:1px solid var(--line); background:#fff; border-radius:999px; width:44px; height:44px; display:flex; align-items:center; justify-content:center; cursor:pointer;}
.cart-badge{position:absolute; top:-4px; right:-4px; background:var(--accent); color:#fff; font-size:11px; font-weight:700; min-width:20px; height:20px; border-radius:999px; display:flex; align-items:center; justify-content:center; padding:0 5px;}

/* hero */
.hero{background:linear-gradient(135deg,#0f2a3a 0%,#0f766e 70%,#14957f 100%); color:#fff; padding:56px 20px 48px;}
.hero-inner{max-width:1100px; margin:0 auto;}
.hero-kicker{font-size:12px; letter-spacing:2.5px; text-transform:uppercase; opacity:.75; margin:0 0 10px;}
.hero h1{font-size:clamp(30px,7vw,52px); line-height:1.15; margin:0 0 12px; letter-spacing:-.5px;}
.hero-sub{opacity:.85; max-width:560px; margin:0 0 22px; font-size:16px;}
.hero-cta{display:flex; gap:12px; flex-wrap:wrap;}
.btn{display:inline-flex; align-items:center; justify-content:center; padding:13px 26px; border-radius:999px; font-weight:700; font-size:16px; text-decoration:none; border:0; cursor:pointer; min-height:48px;}
.btn-primary{background:var(--accent); color:#fff;}
.btn-primary:active{background:var(--accent-d);}
.btn-ghost{background:rgba(255,255,255,.14); color:#fff; border:1px solid rgba(255,255,255,.4);}
.btn-block{width:100%;}

/* trust */
.trust{max-width:1100px; margin:0 auto; padding:18px 16px 4px; display:grid; grid-template-columns:repeat(3,1fr); gap:10px;}
.trust-item{background:var(--card); border:1px solid var(--line); border-radius:var(--radius); padding:12px; display:flex; gap:10px; align-items:center; box-shadow:var(--shadow);}
.trust-ico{font-size:24px;}
.trust-item b{display:block; font-size:13px;}
.trust-item span{font-size:12px; color:var(--muted);}

/* shop */
.shop{max-width:1100px; margin:0 auto; padding:26px 16px 8px;}
.shop h2, .why h2, .contact h2{font-size:22px; margin:0 0 14px; letter-spacing:-.3px;}
.chips{display:flex; gap:8px; overflow-x:auto; padding-bottom:12px; scrollbar-width:none;}
.chips::-webkit-scrollbar{display:none;}
.chip{flex:0 0 auto; border:1px solid var(--line); background:#fff; border-radius:999px; padding:9px 18px; font-size:14px; font-weight:600; cursor:pointer; min-height:40px;}
.chip.active{background:var(--ink); color:#fff; border-color:var(--ink);}
.grid{display:grid; grid-template-columns:repeat(2,1fr); gap:12px;}
@media(min-width:720px){.grid{grid-template-columns:repeat(4,1fr); gap:18px;}}
.card{background:var(--card); border:1px solid var(--line); border-radius:var(--radius); overflow:hidden; box-shadow:var(--shadow); display:flex; flex-direction:column; cursor:pointer;}
.card-img{aspect-ratio:1/1; background:#eef1f4; object-fit:cover; width:100%;}
.card-body{padding:12px; display:flex; flex-direction:column; gap:6px; flex:1;}
.card-name{font-size:14px; font-weight:600; line-height:1.35; display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; min-height:38px;}
.card-price-row{display:flex; align-items:baseline; gap:8px;}
.price{font-size:17px; font-weight:800; color:var(--accent-d);}
.old-price{font-size:13px; color:var(--muted); text-decoration:line-through;}
.card-badge{align-self:flex-start; font-size:11px; font-weight:700; background:#fef3e8; color:var(--accent-d); border-radius:6px; padding:2px 8px;}
.add-btn{margin-top:auto; background:var(--ink); color:#fff; border:0; border-radius:10px; padding:11px; font-size:14px; font-weight:700; cursor:pointer; min-height:44px;}
.add-btn:active{transform:scale(.97);}

/* why / contact */
.why{max-width:1100px; margin:0 auto; padding:26px 16px 8px;}
.why-grid{display:grid; gap:12px;}
@media(min-width:720px){.why-grid{grid-template-columns:repeat(3,1fr);}}
.why-card{background:var(--card); border:1px solid var(--line); border-radius:var(--radius); padding:18px; box-shadow:var(--shadow);}
.why-card b{font-size:16px;}
.why-card p{margin:8px 0 0; color:var(--muted); font-size:14px;}
.contact{max-width:1100px; margin:0 auto; padding:26px 16px 40px;}
.contact-sub{color:var(--muted); margin:0 0 14px;}
.contact-cards{display:grid; gap:12px;}
@media(min-width:720px){.contact-cards{grid-template-columns:repeat(2,1fr);}}
.contact-card{background:var(--card); border:1px solid var(--line); border-radius:var(--radius); padding:18px; text-decoration:none; display:flex; gap:12px; align-items:center; box-shadow:var(--shadow);}
.contact-card b{font-size:16px;}
.contact-card span:last-child{color:var(--muted); font-size:14px;}

footer{background:#0f2a3a; color:#cbd5e1; text-align:center; padding:28px 16px calc(28px + env(safe-area-inset-bottom)); font-size:14px;}
footer p{margin:4px 0;}
.foot-small{font-size:12px; opacity:.6;}

/* overlay / drawer / modal */
.overlay{position:fixed; inset:0; background:rgba(10,18,26,.5); opacity:0; pointer-events:none; transition:opacity .25s; z-index:90;}
.overlay.show{opacity:1; pointer-events:auto;}
.drawer{position:fixed; top:0; right:0; bottom:0; width:min(420px,94vw); background:#fff; z-index:100; transform:translateX(105%); transition:transform .28s ease; display:flex; flex-direction:column; border-radius:18px 0 0 18px;}
.drawer.show{transform:none;}
.drawer-head{display:flex; align-items:center; justify-content:space-between; padding:16px 18px; border-bottom:1px solid var(--line);}
.drawer-head h3{margin:0; font-size:18px;}
.icon-btn{border:0; background:#f1f4f7; width:38px; height:38px; border-radius:50%; font-size:16px; cursor:pointer;}
.drawer-body{flex:1; overflow-y:auto; padding:12px 18px;}
.drawer-foot{border-top:1px solid var(--line); padding:14px 18px calc(14px + env(safe-area-inset-bottom));}
.cart-row{display:flex; gap:12px; padding:12px 0; border-bottom:1px solid var(--line);}
.cart-row img{width:72px; height:72px; border-radius:10px; object-fit:cover; background:#eef1f4;}
.cart-info{flex:1; min-width:0;}
.cart-info b{font-size:14px; display:block; line-height:1.35;}
.cart-info .price{font-size:15px;}
.qty{display:flex; align-items:center; gap:10px; margin-top:8px;}
.qty button{width:34px; height:34px; border-radius:50%; border:1px solid var(--line); background:#fff; font-size:18px; cursor:pointer;}
.qty span{font-weight:700; min-width:20px; text-align:center;}
.cart-remove{border:0; background:none; color:var(--muted); font-size:13px; cursor:pointer; padding:6px 0;}
.totals-row{display:flex; justify-content:space-between; font-size:14px; padding:3px 0; color:var(--muted);}
.totals-row.grand{font-size:17px; font-weight:800; color:var(--ink);}
.empty-cart{text-align:center; color:var(--muted); padding:48px 12px; font-size:15px;}

.modal{position:fixed; inset:0; z-index:110; display:none; align-items:flex-end; justify-content:center;}
.modal.show{display:flex;}
@media(min-width:720px){.modal{align-items:center; padding:24px;}}
.modal-card{background:#fff; width:100%; max-width:560px; max-height:92vh; overflow-y:auto; border-radius:20px 20px 0 0; padding:0 0 calc(18px + env(safe-area-inset-bottom)); animation:slideUp .25s ease;}
@media(min-width:720px){.modal-card{border-radius:20px;}}
@keyframes slideUp{from{transform:translateY(40px); opacity:.6;} to{transform:none; opacity:1;}}
.pd-img{width:100%; aspect-ratio:1/1; object-fit:cover; background:#eef1f4;}
.pd-body{padding:18px;}
.pd-body h3{margin:0 0 8px; font-size:20px;}
.pd-desc{color:var(--muted); font-size:14px; margin:0 0 12px;}
.pd-specs{margin:0 0 16px; padding-left:18px; font-size:14px; color:var(--ink);}
.pd-specs li{margin:4px 0;}
.pd-buy{display:flex; gap:10px; align-items:stretch;}
.pd-buy .qty{margin:0;}
.pd-buy .btn{flex:1;}
.form-field{margin-bottom:12px;}
.form-field label{display:block; font-size:13px; font-weight:600; margin-bottom:6px;}
.form-field input, .form-field textarea{width:100%; border:1px solid var(--line); border-radius:10px; padding:12px; font-size:16px; font-family:inherit; background:#fbfcfd;}
.form-field textarea{resize:vertical; min-height:70px;}
.order-ok{text-align:center; padding:30px 22px;}
.order-ok .big{font-size:52px;}
.order-ok h3{margin:12px 0 8px;}
.order-ok p{color:var(--muted); font-size:14px;}
.order-id{background:#f1f4f7; border-radius:10px; padding:10px; font-weight:700; letter-spacing:1px; margin:14px 0;}
.ok-btns{display:grid; gap:10px; margin-top:8px;}
.btn-wa{background:#25d366; color:#fff;}
.btn-mail{background:var(--ink); color:#fff;}

.toast{position:fixed; left:50%; bottom:calc(28px + env(safe-area-inset-bottom)); transform:translateX(-50%) translateY(20px); background:var(--ink); color:#fff; padding:12px 22px; border-radius:999px; font-size:14px; font-weight:600; opacity:0; pointer-events:none; transition:all .25s; z-index:200; white-space:nowrap;}
.toast.show{opacity:1; transform:translateX(-50%);}