:root{--bg:#f3f5f7;--card:#fff;--ink:#1e293b;--muted:#64748b;--line:#e2e8f0;--blue:#2563eb;--cyan:#06b6d4;--slate:#0f172a;--radius:16px;--shadow:0 8px 30px rgba(15,23,42,.08)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.6}
a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}
img{max-width:100%;display:block}button,input,select,textarea{font:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.announcement{background:linear-gradient(90deg,var(--blue),var(--cyan));color:#fff;text-align:center;padding:8px 16px;font-size:.9rem}
.announcement:empty{display:none}
header.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.header-inner{display:grid;grid-template-columns:auto minmax(0,1fr) auto;grid-template-areas:"logo search cart" "nav nav nav";align-items:center;column-gap:18px;row-gap:10px;padding:14px 0;min-width:0}
.logo{grid-area:logo;font-size:1.45rem;font-weight:800;letter-spacing:-.02em;color:var(--ink);white-space:nowrap} .logo span{color:var(--blue)} .logo:hover{text-decoration:none}
.main-nav{grid-area:nav;display:flex;gap:16px;flex-wrap:wrap;margin-left:0;padding-top:10px;border-top:1px solid var(--line);min-width:0}
.main-nav a{color:var(--ink);font-weight:600;font-size:.95rem}.main-nav a.active,.main-nav a:hover{color:var(--blue);text-decoration:none}
.search-form{grid-area:search;display:flex;gap:0;width:100%;min-width:0;max-width:520px;justify-self:center}
.search-form input{flex:1;min-width:0;padding:10px 12px;border:1px solid var(--line);border-radius:10px 0 0 10px;outline:none}
.search-form button{flex-shrink:0;white-space:nowrap}
.search-form button,.btn{border:0;background:var(--blue);color:#fff;padding:10px 18px;border-radius:10px;cursor:pointer;font-weight:700;transition:.2s}
.search-form button{border-radius:0 10px 10px 0}
.btn:hover,.search-form button:hover{background:#1d4ed8;text-decoration:none;transform:translateY(-1px)}
.btn.secondary{background:#fff;color:var(--ink);border:1px solid var(--line)} .btn.cyan{background:var(--cyan)} .btn.cyan:hover{background:#0891b2}
.btn.small{padding:7px 12px;font-size:.85rem} .btn:disabled{opacity:.55;cursor:not-allowed;transform:none}
.cart-link{grid-area:cart;position:relative;font-weight:700;color:var(--ink);white-space:nowrap}.cart-link:hover{text-decoration:none;color:var(--blue)}
.cart-count{background:#ef4444;color:#fff;border-radius:999px;padding:1px 7px;font-size:.75rem;position:absolute;top:-10px;right:-12px}
.hamburger{display:none;grid-area:hamburger;background:#fff;border:1px solid var(--line);border-radius:10px;padding:8px 12px;cursor:pointer;font-size:1.2rem;flex-shrink:0}
.mobile-nav{display:none;flex-direction:column;gap:10px;padding:0 20px 16px;background:#fff}.mobile-nav.open{display:flex}.mobile-nav a{color:var(--ink);font-weight:600}
.hero{background:linear-gradient(120deg,#dbeafe,#ecfeff 55%,#f3f5f7);border-radius:20px;padding:48px 36px;margin:28px 0;display:grid;grid-template-columns:1.2fr .8fr;gap:24px;align-items:center}
.hero h1{font-size:clamp(2rem,4vw,3.2rem);line-height:1.1;margin:0 0 12px}.hero p{color:#475569;font-size:1.1rem}.hero .cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:20px}
.hero-art{background:#fff;border-radius:16px;padding:24px;text-align:center;box-shadow:var(--shadow);font-size:3rem}
.section{margin:44px 0}.section h2{font-size:1.7rem;margin:0 0 6px}.section .sub{color:var(--muted);margin:0 0 18px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:18px}
.grid.small{grid-template-columns:repeat(auto-fill,minmax(200px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.2s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-3px);box-shadow:0 14px 34px rgba(15,23,42,.12)}
.card img{width:100%;height:200px;object-fit:cover;background:#eef2f7}
.card-body{padding:16px;display:flex;flex-direction:column;gap:6px;flex:1}
.card-body h3{margin:0;font-size:1.02rem;line-height:1.4}.card-body h3 a{color:var(--ink)}
.brand{color:var(--muted);font-size:.85rem;text-transform:uppercase;letter-spacing:.04em}
.price{font-weight:800;font-size:1.15rem}.old-price{color:var(--muted);text-decoration:line-through;font-weight:400;margin-left:8px}
.badge{display:inline-block;background:#dcfce7;color:#166534;border-radius:999px;padding:2px 9px;font-size:.75rem;font-weight:700;margin-right:6px}
.badge.new{background:#cffafe;color:#155e75}.badge.out{background:#fee2e2;color:#991b1b}.badge.sale{background:#dbeafe;color:#1e40af}
.card-actions{margin-top:auto;display:flex;gap:8px;padding-top:8px}
.breadcrumbs{color:var(--muted);font-size:.9rem;margin:20px 0 8px}.breadcrumbs a{color:var(--muted)}
.filters{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px;display:flex;flex-wrap:wrap;gap:12px;margin-bottom:20px}
.filters label{font-size:.85rem;font-weight:600;color:var(--muted);display:flex;flex-direction:column;gap:4px}
.filters input,.filters select,.form input,.form select,.form textarea{padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:#fff;min-width:150px}
.filters input[type=checkbox]{min-width:auto}
.product-layout{display:grid;grid-template-columns:1fr 1fr;gap:28px;margin:24px 0}
.gallery-main{width:100%;height:420px;object-fit:cover;background:#eef2f7;border-radius:16px;border:1px solid var(--line)}
.thumbs{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}.thumbs img{width:84px;height:84px;object-fit:cover;border-radius:10px;cursor:pointer;border:2px solid transparent}.thumbs img.active{border-color:var(--blue)}
.specs{width:100%;border-collapse:collapse;background:#fff}.specs td,.specs th{border:1px solid var(--line);padding:10px 12px;text-align:left}.specs th{background:#f8fafc;width:180px}
.qty{display:flex;align-items:center;gap:10px}.qty button{width:38px;height:38px;border-radius:10px;border:1px solid var(--line);background:#fff;cursor:pointer;font-size:1.2rem}
.cart-table{width:100%;border-collapse:collapse;background:#fff;border-radius:14px;overflow:hidden}.cart-table th,.cart-table td{padding:12px;border-bottom:1px solid var(--line);text-align:left}
.cart-table img{width:72px;height:72px;object-fit:cover;border-radius:10px}
.summary{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;max-width:420px;margin-left:auto}
.summary .row{display:flex;justify-content:space-between;padding:6px 0}.summary .row.total{font-weight:800;font-size:1.2rem;border-top:1px solid var(--line);margin-top:8px;padding-top:12px}
.alert{padding:14px 16px;border-radius:12px;background:#fef3c7;border:1px solid #fde68a;margin:16px 0}.alert.success{background:#dcfce7;border-color:#bbf7d0}.alert.error{background:#fee2e2;border-color:#fecaca}
.empty,.loading{text-align:center;color:var(--muted);padding:36px;background:#fff;border:1px dashed var(--line);border-radius:14px}
.form{max-width:640px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;display:flex;flex-direction:column;gap:14px}
.form label{font-weight:600;display:flex;flex-direction:column;gap:6px}.form input,.form select,.form textarea{width:100%}
.why,.testimonials{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.why div,.testimonials blockquote{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;margin:0}
/* 3D carousel */
.carousel-wrap{position:relative;overflow:hidden;padding:30px 0 10px;perspective:1200px}
.carousel-track{display:flex;align-items:center;justify-content:center;gap:0;min-height:460px;position:relative}
.video-card{width:230px;height:408px;flex:0 0 auto;border-radius:18px;overflow:hidden;position:relative;background:#0f172a;color:#fff;cursor:pointer;transition:transform .5s ease,opacity .5s ease,box-shadow .5s ease;box-shadow:var(--shadow)}
.video-card img{width:100%;height:100%;object-fit:cover}
.video-card.center{width:270px;height:480px;transform:translateZ(60px) scale(1.05);z-index:3;box-shadow:0 20px 50px rgba(15,23,42,.35)}
.video-card.left{transform:translateX(20px) rotateY(28deg) scale(.88);opacity:.75;z-index:1}
.video-card.right{transform:translateX(-20px) rotateY(-28deg) scale(.88);opacity:.75;z-index:1}
.video-card.far{display:none}
.video-card .vc-info{position:absolute;left:0;right:0;bottom:0;padding:14px;background:linear-gradient(transparent,rgba(0,0,0,.85))}
.video-card .play{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:64px;height:64px;border-radius:50%;background:rgba(37,99,235,.92);border:0;color:#fff;font-size:1.5rem;cursor:pointer}
.carousel-nav{display:flex;justify-content:center;gap:12px;align-items:center;margin-top:14px}
.carousel-nav button{width:44px;height:44px;border-radius:50%;border:1px solid var(--line);background:#fff;cursor:pointer;font-size:1.2rem}
.dots{display:flex;gap:8px;justify-content:center;margin-top:12px}.dots button{width:10px;height:10px;border-radius:50%;border:0;background:#cbd5e1;cursor:pointer;padding:0}.dots button.active{background:var(--blue);width:26px;border-radius:99px}
.modal{position:fixed;inset:0;background:rgba(15,23,42,.8);display:flex;align-items:center;justify-content:center;z-index:100;padding:16px}
.modal-inner{background:#000;border-radius:16px;max-width:900px;width:100%;position:relative;overflow:hidden}
.modal-inner iframe,.modal-inner video{width:100%;aspect-ratio:16/9;display:block;border:0}
.modal-close{position:absolute;top:8px;right:8px;z-index:2;background:#fff;border:0;border-radius:50%;width:36px;height:36px;cursor:pointer;font-size:1.2rem}
.ad-slot{margin:20px 0;text-align:center}.ad-slot:empty{display:none}
footer.site-footer{background:#0f172a;color:#cbd5e1;margin-top:56px}
footer.site-footer .footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:24px;padding:36px 0}
footer.site-footer a{color:#cbd5e1}footer.site-footer h4{color:#fff;margin-top:0}
.footer-bottom{border-top:1px solid #1e293b;padding:16px 0;text-align:center;font-size:.9rem}
@media(max-width:900px){.hero{grid-template-columns:1fr}.product-layout{grid-template-columns:1fr}.gallery-main{height:320px}.header-inner{grid-template-columns:minmax(0,1fr) auto auto;grid-template-areas:"logo cart hamburger" "search search search";row-gap:12px}.main-nav{display:none}.hamburger{display:block}.search-form{max-width:none;width:100%;justify-self:stretch}.video-card{width:180px;height:320px}.video-card.center{width:210px;height:373px}}
@media(max-width:520px){.header-inner{column-gap:10px}.logo{font-size:1.2rem}.video-card.left,.video-card.right{display:none}.video-card{width:230px;height:408px}.video-card.center{width:250px;height:444px}.cart-table{font-size:.85rem}}