:root{
  --blue:#0d5cb6; --blue2:#0a4a94; --orange:#f5820b; --red:#e0322b;
  --bg:#f2f4f7; --card:#fff; --line:#e3e7ee; --txt:#20262e; --muted:#6b7684;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Segoe UI',Roboto,Arial,sans-serif;color:var(--txt);background:var(--bg);line-height:1.45}
a{text-decoration:none;color:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 14px}

/* topbar */
.topbar{background:#0b1c33;color:#c8d6e8;font-size:12.5px}
.topbar-inner{display:flex;justify-content:space-between;align-items:center;height:34px;flex-wrap:wrap;gap:8px}
.topbar-left{display:flex;gap:18px;flex-wrap:wrap}
.topbar-right b{color:#fff}

/* header */
.header{background:linear-gradient(90deg,var(--blue),var(--blue2));color:#fff}
.header-inner{display:flex;align-items:center;gap:20px;height:74px}
.logo{display:flex;align-items:center;gap:9px;font-weight:800;font-size:21px;color:#fff;letter-spacing:.5px}
.logo-mark{background:var(--orange);color:#fff;border-radius:8px;padding:5px 9px;font-size:18px;letter-spacing:0}
.logo-text{display:flex;flex-direction:column;line-height:1}
.logo-text em{font-style:normal;color:#ffd27a;font-size:12.5px;letter-spacing:3px;font-weight:700;margin-top:2px}
.searchbox{flex:1;display:flex;background:#fff;border-radius:24px;overflow:hidden;max-width:560px}
.searchbox input{flex:1;border:0;outline:0;padding:11px 18px;font-size:14px}
.searchbox button{border:0;background:#fff;padding:0 16px;font-size:16px;cursor:pointer;color:var(--blue)}
.header-actions{display:flex;align-items:center;gap:16px;margin-left:auto}
.hotline{display:flex;flex-direction:column;line-height:1.15}
.hotline small{font-size:11.5px;opacity:.85}
.hotline b{font-size:16px}
.cart-btn{background:#fff;color:var(--blue);border:0;border-radius:24px;padding:9px 16px;font-weight:700;font-size:14px;cursor:pointer;display:flex;align-items:center;gap:6px}
.cart-count{background:var(--red);color:#fff;border-radius:20px;min-width:20px;height:20px;display:inline-flex;align-items:center;justify-content:center;font-size:12px;padding:0 5px}

/* mainnav */
.mainnav{background:var(--blue2)}
.mainnav-inner{display:flex;gap:2px;flex-wrap:wrap}
.mainnav a{color:#fff;padding:12px 15px;font-size:13.5px;font-weight:600;display:inline-block}
.mainnav a:hover,.mainnav a.active{background:var(--orange)}

/* banner */
.banner{background:linear-gradient(120deg,#e8f1fd,#dbeafe);border-radius:12px;margin:16px 0;padding:26px 28px;display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.banner h1{font-size:24px;color:var(--blue2)}
.banner p{color:#4a5768;margin-top:6px;font-size:14px}
.banner-off{background:var(--orange);color:#fff;border-radius:12px;padding:14px 22px;text-align:center;font-size:15px}
.banner-off b{font-size:26px}
.banner-off small{font-size:12px;opacity:.95}

/* layout */
.layout{display:grid;grid-template-columns:260px 1fr;gap:18px;padding:8px 14px 40px;align-items:start}
.crumb{font-size:13px;color:var(--muted);margin-bottom:12px}
.crumb a{color:var(--blue)}

/* sidebar */
.fbox{background:#fff;border:1px solid var(--line);border-radius:10px;margin-bottom:14px;overflow:hidden}
.fbox h3{font-size:13px;background:#f7f9fc;padding:11px 14px;border-bottom:1px solid var(--line);color:var(--blue2);letter-spacing:.3px}
.fbox ul{list-style:none;padding:6px 0}
.fbox li{padding:8px 14px;font-size:13.5px;color:#3c4655;cursor:pointer;display:flex;justify-content:space-between;gap:8px}
.fbox li:hover{background:#f2f7ff;color:var(--blue)}
.fbox li.active{color:var(--blue);font-weight:700;background:#eaf2ff}
.fbox li small{color:var(--muted)}

/* toolbar */
.toolbar{display:flex;justify-content:space-between;align-items:center;background:#fff;border:1px solid var(--line);border-radius:10px;padding:10px 14px;margin-bottom:14px;flex-wrap:wrap;gap:8px}
.result-count{font-size:13.5px;color:var(--muted)}
.sort{display:flex;align-items:center;gap:8px;font-size:13.5px}
.sort select{padding:7px 10px;border:1px solid var(--line);border-radius:8px;font-size:13.5px;background:#fff}

/* grid */
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.card{background:var(--card);border:1px solid var(--line);border-radius:11px;overflow:hidden;display:flex;flex-direction:column;transition:.15s}
.card:hover{box-shadow:0 6px 18px rgba(13,92,182,.14);transform:translateY(-2px);border-color:#c9dcf5}
.card-img{aspect-ratio:1/1;background:#fff;display:flex;align-items:center;justify-content:center;padding:8px;cursor:pointer}
.card-img img{max-width:100%;max-height:100%;object-fit:contain}
.card-body{padding:10px 12px 14px;display:flex;flex-direction:column;gap:7px;flex:1}
.promo{font-size:11.5px;color:var(--red);background:#fff5f4;border:1px dashed #ffd0cc;border-radius:6px;padding:4px 8px}
.promo b{font-weight:700}
.card-name{font-size:13.5px;font-weight:600;color:#243043;min-height:38px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;cursor:pointer}
.card-name:hover{color:var(--blue)}
.spec{font-size:11.5px;color:var(--muted);min-height:16px}
.card-foot{margin-top:auto;display:flex;justify-content:space-between;align-items:center;gap:8px}
.price{font-size:16px;font-weight:800;color:var(--red)}
.price small{font-weight:400;color:var(--muted);text-decoration:line-through;font-size:11.5px;margin-left:5px}
.add{border:0;background:var(--blue);color:#fff;border-radius:8px;padding:7px 11px;font-size:12.5px;font-weight:700;cursor:pointer;white-space:nowrap}
.add:hover{background:var(--orange)}
.badge{position:absolute;margin:8px;background:var(--red);color:#fff;font-size:10.5px;padding:2px 7px;border-radius:5px;font-weight:700}
.card-imgwrap{position:relative}

/* footer */
.footer{background:#0b1c33;color:#c8d6e8;margin-top:20px}
.footer-inner{display:grid;grid-template-columns:1.3fr 1fr;gap:24px;padding:30px 14px;font-size:13.5px}
.footer h4{color:#fff;margin-bottom:10px;font-size:15px}
.footer p{margin:4px 0;opacity:.9}
.copyright{text-align:center;padding:14px;font-size:12.5px;background:#081426;color:#7f92ab}

/* cart drawer */
.overlay{position:fixed;inset:0;background:rgba(10,20,35,.5);opacity:0;pointer-events:none;transition:.2s;z-index:40}
.overlay.show{opacity:1;pointer-events:auto}
.cart{position:fixed;top:0;right:0;height:100%;width:400px;max-width:92vw;background:#fff;z-index:50;transform:translateX(105%);transition:.25s;display:flex;flex-direction:column;box-shadow:-8px 0 30px rgba(0,0,0,.2)}
.cart.show{transform:none}
.cart-head{display:flex;justify-content:space-between;align-items:center;padding:16px;border-bottom:1px solid var(--line);font-size:16px}
.cart-head button{border:0;background:#f1f4f8;border-radius:8px;width:30px;height:30px;cursor:pointer;font-size:15px}
.cart-body{flex:1;overflow:auto;padding:10px 16px}
.ci{display:flex;gap:10px;padding:12px 0;border-bottom:1px solid var(--line)}
.ci img{width:64px;height:64px;object-fit:contain;border:1px solid var(--line);border-radius:8px;background:#fff}
.ci-info{flex:1;font-size:13px}
.ci-info .n{font-weight:600;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.ci-info .p{color:var(--red);font-weight:700;margin-top:3px}
.qty{display:flex;align-items:center;gap:8px;margin-top:6px}
.qty button{width:24px;height:24px;border:1px solid var(--line);background:#fff;border-radius:6px;cursor:pointer;font-size:14px;line-height:1}
.qty span{min-width:22px;text-align:center;font-size:13.5px}
.ci-del{border:0;background:none;color:#b04;cursor:pointer;font-size:12.5px;margin-top:6px}
.cart-empty{text-align:center;color:var(--muted);padding:50px 10px;font-size:14px}
.cart-foot{border-top:1px solid var(--line);padding:14px 16px}
.cart-total{display:flex;justify-content:space-between;font-size:15px;margin-bottom:10px}
.cart-total b{color:var(--red);font-size:19px}
.btn-primary{width:100%;border:0;background:var(--orange);color:#fff;border-radius:9px;padding:12px;font-size:15px;font-weight:700;cursor:pointer}
.btn-primary:hover{background:#db7308}
.btn-ghost{width:100%;border:1px solid var(--line);background:#fff;color:#556;border-radius:9px;padding:9px;font-size:13.5px;margin-top:8px;cursor:pointer}

/* modal */
.modal{position:fixed;inset:0;background:rgba(10,20,35,.55);display:none;align-items:flex-start;justify-content:center;z-index:60;padding:40px 14px;overflow:auto}
.modal.show{display:flex}
.modal-box{background:#fff;border-radius:12px;max-width:460px;width:100%;padding:22px;position:relative}
.modal-close{position:absolute;top:12px;right:12px;border:0;background:#f1f4f8;border-radius:8px;width:30px;height:30px;cursor:pointer}
.modal-box h3{color:var(--blue2);margin-bottom:12px}
.order-summary{background:#f7f9fc;border-radius:9px;padding:12px;font-size:13px;margin-bottom:14px;max-height:180px;overflow:auto}
.order-summary .r{display:flex;justify-content:space-between;padding:3px 0}
.form{display:flex;flex-direction:column;gap:10px}
.form input,.form textarea{border:1px solid var(--line);border-radius:9px;padding:11px 13px;font-size:14px;font-family:inherit;outline:0}
.form input:focus,.form textarea:focus{border-color:var(--blue)}
.form textarea{min-height:64px;resize:vertical}
.cod{font-size:13.5px;display:flex;gap:8px;align-items:center}
.order-msg{margin-top:10px;font-size:14px;font-weight:600}
.order-msg.ok{color:#17864a}
.order-msg.err{color:var(--red)}
.empty{grid-column:1/-1;text-align:center;color:var(--muted);padding:60px 0}

@media(max-width:960px){
  .grid{grid-template-columns:repeat(3,1fr)}
  .layout{grid-template-columns:1fr}
  .sidebar{order:2}
  .header-inner{flex-wrap:wrap;height:auto;padding:12px 0}
  .searchbox{order:3;max-width:none;width:100%}
}
@media(max-width:600px){
  .grid{grid-template-columns:repeat(2,1fr)}
  .topbar-left span:nth-child(n+3){display:none}
}

/* service strip */
.svc-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:4px 0 14px}
.svc-strip a{background:#fff;border:1px solid var(--line);border-radius:11px;padding:12px 14px;display:flex;flex-direction:column;gap:2px;transition:.15s}
.svc-strip a:hover{border-color:#c9dcf5;box-shadow:0 6px 16px rgba(13,92,182,.12);transform:translateY(-2px)}
.svc-strip span{font-size:20px}
.svc-strip b{font-size:14px;color:var(--blue2)}
.svc-strip small{font-size:12px;color:var(--muted)}
.helplist li{font-size:13px}
@media(max-width:760px){.svc-strip{grid-template-columns:repeat(2,1fr)}}

/* product detail */
.detail-box{max-width:880px}
.detail-grid{display:grid;grid-template-columns:340px 1fr;gap:24px}
.detail-img{background:#fff;border:1px solid var(--line);border-radius:12px;display:flex;align-items:center;justify-content:center;padding:18px;aspect-ratio:1/1}
.detail-img img{max-width:100%;max-height:100%;object-fit:contain}
.detail-info h2{font-size:20px;color:#243043;margin:4px 0 8px;line-height:1.3}
.d-brand{display:inline-block;background:#eaf2ff;color:var(--blue);font-size:12px;font-weight:700;padding:3px 10px;border-radius:6px}
.d-spec{font-size:13px;color:var(--muted);margin-bottom:10px}
.d-price{margin:12px 0;display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.d-price b{font-size:26px;color:var(--red);font-weight:800}
.d-price small{color:var(--muted);text-decoration:line-through;font-size:15px}
.d-off{background:#fff2f0;color:var(--red);font-size:12px;font-weight:700;padding:3px 9px;border-radius:20px}
.d-desc{font-size:13.5px;color:#3c4655;line-height:1.6;margin:12px 0;background:#f7f9fc;border-radius:9px;padding:12px}
.d-meta{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px;font-size:12.5px;color:#3c4655}
.d-meta span{background:#f2f4f7;border-radius:6px;padding:4px 10px}
.d-qty{display:flex;align-items:center;gap:10px;font-size:14px;margin:8px 0 14px}
.d-qty button{width:32px;height:32px;border:1px solid var(--line);background:#fff;border-radius:8px;cursor:pointer;font-size:16px}
.d-qty span{min-width:34px;text-align:center;font-weight:700}
.d-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.btn-buy{border:0;background:var(--red);color:#fff;border-radius:9px;padding:12px;font-size:15px;font-weight:700;cursor:pointer}
.btn-buy:hover{background:#c22a24}
.d-policy{font-size:12px;color:var(--muted);margin-top:12px;line-height:1.6}
.d-policy a{color:var(--blue)}
@media(max-width:700px){.detail-grid{grid-template-columns:1fr}.detail-box{max-width:460px}}

/* checkout options */
.opt-group{border:1px solid var(--line);border-radius:10px;padding:10px 12px}
.opt-title{display:block;font-size:13px;font-weight:700;color:var(--blue2);margin-bottom:6px}
.opt{display:flex;gap:9px;align-items:flex-start;padding:8px;border-radius:8px;cursor:pointer}
.opt:hover{background:#f7f9fc}
.opt input{margin-top:3px}
.opt span{display:flex;flex-direction:column}
.opt b{font-size:13.5px}
.opt small{font-size:12px;color:var(--muted)}
.fee-note{font-size:13px;color:#3c4655;background:#f7f9fc;border-radius:8px;padding:9px 12px}
.order-summary .r.tot{border-top:1px dashed var(--line);margin-top:6px;padding-top:8px;font-size:15px}
.order-summary .r.tot b{color:var(--red)}

/* done modal */
.done-box{max-width:420px;text-align:center}
.done-ico{font-size:46px}
.done-box h3{color:#17864a;margin:6px 0}
.done-code{font-size:15px;margin:8px 0}
.done-code b{color:var(--red);font-size:18px;letter-spacing:1px}
.done-txt{font-size:13.5px;color:var(--muted);margin-bottom:16px}
.done-actions{display:flex;flex-direction:column;gap:8px}
.done-actions .btn-ghost{display:block;padding:11px;text-align:center}

/* ===== chrome footer 4 cols ===== */
.footer-inner.f4{grid-template-columns:1.2fr 1fr 1fr 1fr;display:grid;gap:24px}
@media(max-width:900px){.footer-inner.f4{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.footer-inner.f4{grid-template-columns:1fr}}
.card-name a{color:inherit;text-decoration:none}
.card-img{display:block}

/* ===== policy pages ===== */
.policy-wrap{max-width:920px;margin:0 auto;padding:18px 14px 60px;background:#fff}
.policy-wrap h1{font-size:24px;margin:6px 0 14px;color:#0d3b66}
.policy-wrap h3{font-size:17px;margin:20px 0 8px;color:#0d3b66}
.policy-wrap p,.policy-wrap li{line-height:1.7;color:#333;font-size:15px}
.policy-wrap ul,.policy-wrap ol{padding-left:22px}
.spec-table{width:100%;border-collapse:collapse;margin:10px 0}
.spec-table td{border:1px solid #e2e8f0;padding:9px 12px;font-size:14.5px;vertical-align:top}
.spec-table td:first-child{background:#f7fafc;width:34%;font-weight:600;color:#333}

/* ===== product detail page ===== */
.pd{display:grid;grid-template-columns:minmax(0,440px) 1fr;gap:26px;background:#fff;padding:18px;border:1px solid #e6ebf2;border-radius:10px}
@media(max-width:860px){.pd{grid-template-columns:1fr}}
.pd-mainimg{border:1px solid #eef2f7;border-radius:8px;padding:10px;background:#fff;text-align:center}
.pd-mainimg img{max-width:100%;height:340px;object-fit:contain}
.pd-thumbs{display:flex;gap:8px;margin-top:10px}
.pd-thumbs img{width:64px;height:64px;object-fit:contain;border:1px solid #e2e8f0;border-radius:6px;padding:3px;cursor:pointer}
.pd-thumbs img.on{border-color:#0d5cb6}
.pd-name{font-size:22px;margin:0 0 6px;color:#12304f;line-height:1.35}
.pd-rating{color:#f6a609;font-size:14px;margin-bottom:8px}
.pd-rating span{color:#8a94a6}
.pd-price{font-size:15px;color:#8a94a6;margin:8px 0}
.pd-price b{font-size:26px;color:#e02424;margin-right:10px}
.pd-price small{text-decoration:line-through}
.pd-off{display:inline-block;background:#ffe9e9;color:#e02424;border-radius:4px;padding:2px 8px;margin-left:8px;font-size:13px}
.pd-stock{color:#1a9c4b;font-weight:600;margin:6px 0 12px}
.pd-promo{background:#fff8ec;border:1px dashed #f0b34e;border-radius:8px;padding:10px 14px;margin-bottom:14px}
.pd-promo-title{font-weight:700;color:#b96b00;margin-bottom:6px}
.pd-promo ul{margin:0;padding-left:20px}
.pd-promo li{font-size:14px;line-height:1.7}
.pd-desc h3{font-size:16px;margin:6px 0 8px;color:#0d3b66}
.pd-desc ul{padding-left:18px;margin:0 0 14px}
.pd-desc li{font-size:14.5px;line-height:1.8}
.pd-qty{margin-bottom:10px;font-size:14px;display:flex;align-items:center;gap:8px}
.pd-qty button{width:30px;height:30px;border:1px solid #cfd8e3;background:#fff;border-radius:6px;cursor:pointer;font-size:16px}
.pd-qty span{min-width:26px;text-align:center;font-weight:600}
.pd-actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:14px}
.pd-actions .btn-primary,.pd-actions .btn-buy,.pd-actions .btn-installment{padding:11px 18px;border-radius:8px;border:none;font-weight:700;font-size:14.5px;cursor:pointer;text-decoration:none;display:inline-block}
.btn-buy{background:#e02424;color:#fff}
.btn-installment{background:#0d5cb6;color:#fff}
.pd-contact{border-top:1px dashed #e2e8f0;padding-top:10px;font-size:14px;display:flex;flex-wrap:wrap;gap:12px}
.pd-contact a{color:#e02424;text-decoration:none}
.pd-tabs{display:flex;gap:6px;margin:22px 0 0;border-bottom:2px solid #0d5cb6}
.pd-tabs .tab{background:#f1f5f9;border:1px solid #e2e8f0;border-bottom:none;padding:10px 18px;font-weight:600;cursor:pointer;border-radius:8px 8px 0 0;color:#475569;font-size:14px}
.pd-tabs .tab.on{background:#0d5cb6;color:#fff;border-color:#0d5cb6}
.pd-tabpanel{background:#fff;border:1px solid #e6ebf2;border-top:none;padding:16px;border-radius:0 0 10px 10px}
.pd-tabpanel h3{margin:0 0 10px;color:#0d3b66;font-size:16px}
.pd-similar{margin-top:26px}
.pd-similar h2{font-size:19px;margin:0 0 12px;color:#0d3b66}

/* toast */
.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%) translateY(20px);background:#111827;color:#fff;padding:11px 20px;border-radius:8px;font-size:14px;opacity:0;pointer-events:none;transition:.25s;z-index:9999}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.empty{padding:30px;text-align:center;color:#64748b}

/* ===== header nav layout ===== */
.mainnav-inner{display:flex;flex-wrap:wrap;align-items:center;gap:2px}
.catlist{display:inline-flex;flex-wrap:wrap;align-items:center}