/* =========================================================
   北京唐导智能科技有限公司 · 商城
   纯手写样式，无第三方依赖
   ========================================================= */
:root {
  --red: #ea1c26;
  --red-dark: #c9141d;
  --dark: #333333;
  --text: #333333;
  --muted: #888888;
  --line: #e8e8e8;
  --bg: #f7f7f7;
  --orange: #ff9f00;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  line-height: 1.65;
  color: var(--text);
  background: #fff;
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--red); }
img { display: block; max-width: 100%; border: 0; }
[hidden] { display: none !important; }
ul, ol { list-style: none; }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }

.container { width: 1220px; max-width: calc(100% - 40px); margin: 0 auto; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  height: 42px; padding: 0 26px; border: 0; font-size: 14px;
  background: var(--red); color: #fff; transition: background .2s;
}
.btn:hover { background: var(--red-dark); color: #fff; }
.btn-orange { background: var(--orange); }
.btn-orange:hover { background: #e88f00; }

.card-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

/* ============ 顶部信息条 ============ */
.header-top { background: #f6f6f6; border-bottom: 1px solid #ededed; font-size: 12px; color: #7a7a7a; }
.header-top .container { height: 34px; display: flex; align-items: center; justify-content: space-between; }
.header-top .sep { margin: 0 10px; color: #cfcfcf; }
.header-top a:hover { color: var(--red); }

/* ============ 头部搜索区 ============ */
.header-center { padding: 22px 0; }
.header-center .container { display: flex; align-items: center; gap: 40px; }
.logo { flex: 0 0 auto; }
.logo svg { display: block; height: 56px; width: auto; }
.header-search { flex: 1 1 auto; max-width: 600px; margin: 0 auto; }
.header-search form { display: flex; height: 44px; border: 2px solid var(--red); background: #fff; }
.header-search input { flex: 1; min-width: 0; border: 0; outline: 0; padding: 0 16px; font-size: 14px; color: #333; }
.header-search input::placeholder { color: #aaa; }
.header-search button { flex: 0 0 62px; border: 0; background: var(--red); color: #fff; display: flex; align-items: center; justify-content: center; }
.header-search button:hover { background: var(--red-dark); }
.header-search svg { width: 20px; height: 20px; }
.header-actions { flex: 0 0 auto; display: flex; align-items: center; gap: 28px; }
.header-actions a { color: #444; display: flex; align-items: center; }
.header-actions a:hover { color: var(--red); }
.header-actions svg { width: 24px; height: 24px; }

/* ============ 主导航 ============ */
.main-nav { background: var(--dark); }
.main-nav ul { display: flex; justify-content: center; flex-wrap: wrap; }
.main-nav a {
  display: block; height: 52px; line-height: 52px; padding: 0 34px;
  color: #fff; font-size: 15px; transition: background .2s;
}
.main-nav a:hover, .main-nav a.active { background: var(--red); color: #fff; }

/* ============ 首页轮播区 ============ */
.hero { padding-top: 26px; }
.hero-layout { display: grid; grid-template-columns: 280px 1fr; gap: 20px; }
.hero-side { display: grid; grid-template-rows: 1fr 1fr; gap: 16px; }
.hero-banner { position: relative; overflow: hidden; background: #f3f3f3; min-height: 150px; }
.hero-banner img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s; }
.hero-banner:hover img { transform: scale(1.04); }
.hero-banner-text { position: absolute; left: 20px; top: 50%; transform: translateY(-50%); }
.hero-banner-text strong { display: block; font-size: 20px; color: #1d1d1d; letter-spacing: 1px; }
.hero-banner-text em { display: inline-block; margin-top: 8px; font-style: normal; font-size: 12px; color: var(--red); border-bottom: 1px solid var(--red); padding-bottom: 2px; }

.hero-slider { position: relative; height: 316px; overflow: hidden; background: #f3f3f3; }
.hero-slide {
  position: absolute; inset: 0; opacity: 0; visibility: hidden;
  transition: opacity .5s ease; background: #f3f3f3;
}
.hero-slide.active { opacity: 1; visibility: visible; }
.hero-slide img { width: 100%; height: 100%; object-fit: cover; }
.hero-copy { position: absolute; left: 62px; top: 50%; transform: translateY(-50%); max-width: 320px; }
.hero-copy h2 { font-size: 44px; line-height: 1.2; font-weight: 800; letter-spacing: 2px; color: #1d1d1d; }
.hero-copy p { margin: 10px 0 22px; font-size: 15px; color: #555; }
.hero-copy .btn { height: 40px; padding: 0 26px; font-size: 14px; }
.hero-dots { position: absolute; left: 50%; bottom: 18px; transform: translateX(-50%); display: flex; gap: 8px; z-index: 2; }
.hero-dots button { width: 9px; height: 9px; border-radius: 50%; border: 1px solid var(--red); background: transparent; padding: 0; }
.hero-dots button.active { background: var(--red); }

/* ============ 首页商品区 ============ */
.section { padding-top: 64px; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 24px; }
.section-title { position: relative; font-size: 26px; font-weight: 700; color: #222; padding-bottom: 10px; letter-spacing: 1px; }
.section-title::after { content: ""; position: absolute; left: 0; bottom: 0; width: 42px; height: 3px; background: var(--red); }
.section-more { font-size: 13px; color: #888; }
.section-more:hover { color: var(--red); }

.product-card { border: 1px solid #ececec; background: #fff; padding: 12px; display: flex; flex-direction: column; transition: border-color .2s, box-shadow .2s; }
.product-card:hover { border-color: var(--red); box-shadow: 0 8px 22px rgba(0, 0, 0, .07); }
.product-thumb { display: block; aspect-ratio: 1 / 1; overflow: hidden; background: #fff; }
.product-thumb img { width: 100%; height: 100%; object-fit: contain; transition: transform .3s; }
.product-card:hover .product-thumb img { transform: scale(1.03); }
.product-name { margin-top: 12px; font-size: 14px; line-height: 1.55; height: 44px; overflow: hidden; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.product-name a:hover { color: var(--red); }
.product-price { margin-top: 8px; color: var(--red); font-size: 18px; font-weight: 700; }
.product-price small { font-size: 13px; font-weight: 400; margin-right: 1px; }
.product-price del { margin-left: 8px; color: #bbb; font-size: 12px; font-weight: 400; }
.product-cart { margin-top: 12px; display: flex; }
.product-cart button { flex: 1; height: 34px; border: 1px solid #ddd; background: #fff; font-size: 13px; color: #555; }
.product-cart button:hover { border-color: var(--red); color: var(--red); }

/* 首页商品滑动区（一行四列） */
.product-slider { position: relative; }
.product-track { display: flex; gap: 20px; overflow-x: auto; scroll-behavior: smooth; scroll-snap-type: x mandatory; padding-bottom: 4px; scrollbar-width: none; }
.product-track::-webkit-scrollbar { display: none; }
.product-track .product-card { flex: 0 0 calc((100% - 60px) / 4); scroll-snap-align: start; }
.slider-btn {
  position: absolute; top: 50%; transform: translateY(-50%); z-index: 3;
  width: 42px; height: 42px; border-radius: 50%; border: 1px solid #e5e5e5;
  background: #fff; color: #666; font-size: 24px; line-height: 1; padding-bottom: 2px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 14px rgba(0, 0, 0, .09); transition: all .2s;
}
.slider-btn:hover { color: var(--red); border-color: var(--red); }
.slider-btn[disabled] { opacity: .3; pointer-events: none; }
.slider-btn.prev { left: -18px; }
.slider-btn.next { right: -18px; }

/* ============ 页脚 ============ */
.footer { margin-top: 80px; padding: 34px 0 40px; border-top: 1px solid #eee; background: #fff; }
.footer-inner { text-align: center; font-size: 12px; color: #8c8c8c; line-height: 2.1; }
.footer-inner a { color: #8c8c8c; }
.footer-inner a:hover { color: var(--red); }
.footer-inner .footer-line { margin: 0 8px; color: #ddd; }

/* ============ 面包屑 / 列表页 ============ */
.crumb-bar { background: #f7f7f7; border-bottom: 1px solid #f0f0f0; }
.crumb-bar .container { height: 46px; display: flex; align-items: center; font-size: 13px; color: #777; }
.crumb-bar a:hover { color: var(--red); }
.crumb-bar .arrow { margin: 0 10px; color: #c4c4c4; }
.crumb-bar .current { color: #333; }

.filter-panel { border: 1px solid #ececec; margin-top: 24px; }
.filter-row { display: flex; align-items: center; min-height: 52px; border-bottom: 1px solid #f0f0f0; font-size: 13px; }
.filter-row:last-child { border-bottom: 0; }
.filter-row dt { flex: 0 0 110px; padding-left: 20px; color: #888; }
.filter-row dd { flex: 1; display: flex; flex-wrap: wrap; align-items: center; gap: 6px; padding: 8px 16px; }
.filter-row dd a, .filter-row dd button { padding: 3px 12px; border: 1px solid transparent; background: none; color: #555; font-size: 13px; }
.filter-row dd a:hover, .filter-row dd button:hover { color: var(--red); }
.filter-row dd .on { color: var(--red); border-color: var(--red); }

.list-layout { display: grid; grid-template-columns: 250px 1fr; gap: 26px; padding-top: 24px; }
.hot-side { border: 1px solid #ececec; align-self: start; }
.hot-side h3 { height: 46px; line-height: 46px; padding: 0 18px; font-size: 15px; font-weight: 600; border-bottom: 1px solid #ececec; background: #fafafa; }
.hot-item { display: flex; gap: 12px; padding: 14px; border-bottom: 1px solid #f2f2f2; }
.hot-item:last-child { border-bottom: 0; }
.hot-item img { width: 86px; height: 86px; object-fit: contain; flex: 0 0 86px; }
.hot-item .hot-name { font-size: 12px; line-height: 1.5; color: #555; height: 36px; overflow: hidden; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.hot-item .hot-price { margin-top: 8px; color: var(--red); font-weight: 700; font-size: 14px; }
.hot-item:hover .hot-name { color: var(--red); }

.sort-bar { height: 46px; background: #f5f5f5; display: flex; align-items: center; justify-content: space-between; padding: 0 16px; font-size: 13px; }
.sort-tabs { display: flex; gap: 2px; }
.sort-tabs button { height: 46px; padding: 0 20px; border: 0; background: none; color: #555; }
.sort-tabs button:hover { color: var(--red); }
.sort-tabs button.on { background: var(--red); color: #fff; }
.sort-count { color: #999; }
.sort-count b { color: var(--red); font-weight: 600; }
.list-grid { margin-top: 16px; }
.empty-tip { padding: 80px 0; text-align: center; color: #999; font-size: 15px; }

/* ============ 商品详情 ============ */
.detail-wrap { display: grid; grid-template-columns: 1fr 260px; gap: 28px; padding-top: 24px; }
.detail-top { display: grid; grid-template-columns: 430px 1fr; gap: 30px; }
.gallery-main { width: 100%; aspect-ratio: 1 / 1; border: 1px solid #eee; background: #fff; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.gallery-main img { max-width: 96%; max-height: 96%; object-fit: contain; }
.gallery-thumbs { display: flex; gap: 10px; margin-top: 12px; }
.gallery-thumbs button { width: 68px; height: 68px; border: 1px solid #e5e5e5; background: #fff; padding: 4px; }
.gallery-thumbs button.on { border-color: var(--red); }
.gallery-thumbs img { width: 100%; height: 100%; object-fit: contain; }

.detail-info h1 { font-size: 19px; line-height: 1.55; font-weight: 600; color: #222; }
.detail-sub { margin-top: 6px; font-size: 12px; color: #999; }
.price-box { margin-top: 16px; background: #fafafa; padding: 16px 20px 14px; display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; }
.price-main { font-size: 13px; color: #777; }
.price-main .price { display: block; margin-top: 4px; font-size: 32px; line-height: 1.1; color: var(--red); font-weight: 700; }
.price-main .price small { font-size: 18px; font-weight: 400; }
.price-main .market { margin-top: 6px; font-size: 12px; color: #999; }
.price-main .market del { margin-left: 6px; }
.price-stats { display: flex; gap: 22px; padding-top: 6px; text-align: center; font-size: 12px; color: #999; }
.price-stats b { display: block; font-size: 16px; color: #ea1c26; font-weight: 600; }
.info-row { display: flex; gap: 12px; padding: 9px 0; font-size: 13px; color: #666; border-bottom: 1px dashed #f0f0f0; }
.info-row dt { flex: 0 0 56px; color: #999; }
.info-row dd { flex: 1; }
.qty { display: inline-flex; border: 1px solid #ddd; height: 32px; }
.qty button { width: 32px; border: 0; background: #f7f7f7; font-size: 16px; color: #555; }
.qty input { width: 48px; border: 0; border-left: 1px solid #ddd; border-right: 1px solid #ddd; text-align: center; outline: 0; }
.buy-actions { display: flex; gap: 14px; margin-top: 22px; }
.buy-actions .btn { height: 46px; min-width: 150px; font-size: 15px; }
.buy-note { margin-top: 14px; font-size: 12px; color: #999; line-height: 1.9; }

.detail-side .store-card { border: 1px solid #ececec; padding: 18px; text-align: center; }
.store-card .store-name { font-size: 15px; font-weight: 600; color: #222; }
.store-card .store-tag { display: inline-block; margin: 8px auto 14px; padding: 1px 8px; background: #fdecec; color: var(--red); font-size: 12px; }
.store-card .store-scores { display: flex; justify-content: space-between; gap: 6px; font-size: 12px; color: #999; padding: 12px 0; border-top: 1px solid #f2f2f2; border-bottom: 1px solid #f2f2f2; }
.store-card .store-scores b { display: block; color: #444; font-size: 14px; }
.store-card .store-title { margin-top: 14px; color: var(--red); font-size: 17px; font-weight: 700; letter-spacing: 1px; }
.store-card .store-contact { margin-top: 8px; font-size: 12px; color: #888; }

.detail-tabs { margin-top: 40px; }
.tab-nav { display: flex; border-bottom: 2px solid #f0f0f0; }
.tab-nav button { height: 46px; padding: 0 32px; border: 0; background: none; font-size: 15px; color: #555; position: relative; }
.tab-nav button.on { color: #fff; background: var(--red); }
.tab-panel { display: none; padding: 24px 0; }
.tab-panel.on { display: block; }
.desc-meta { font-size: 13px; color: #666; line-height: 2.2; margin-bottom: 20px; }
.desc-meta span { color: #999; }
.desc-body img { width: 100%; max-width: 820px; margin: 0 auto 10px; }
.spec-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.spec-table th, .spec-table td { border: 1px solid #ececec; padding: 12px 16px; text-align: left; }
.spec-table th { width: 160px; background: #fafafa; color: #777; font-weight: 400; }
.after-box { font-size: 13px; color: #666; line-height: 2.1; }
.after-box h3 { font-size: 15px; color: #222; margin-bottom: 8px; }
.after-box p + h3 { margin-top: 20px; }

/* ============ 有偿资讯 ============ */
.page-banner { background: #f7f7f7; border-bottom: 1px solid #f0f0f0; padding: 34px 0; }
.page-banner h1 { font-size: 26px; color: #222; }
.page-banner p { margin-top: 6px; color: #999; font-size: 13px; }
.paid-card { margin-top: 30px; border: 1px solid #eee; padding: 34px; display: grid; grid-template-columns: 380px 1fr; gap: 46px; }
.paid-left .paid-banner { width: 100%; height: 300px; object-fit: cover; }
.qr-box { margin-top: 24px; background: #fafafa; border: 1px solid #f0f0f0; padding: 18px; text-align: center; }
.qr-box img { width: 180px; height: 180px; object-fit: contain; margin: 0 auto; }
.qr-box p { margin-top: 10px; font-size: 13px; color: #555; }
.qr-box p strong { color: var(--red); }
.qr-box .qr-small { font-size: 12px; color: #999; }
.paid-right h2 { font-size: 20px; color: #222; padding-bottom: 14px; border-bottom: 1px solid #eee; }
.paid-note { margin: 12px 0 4px; font-size: 12px; color: #999; }
.paid-list li { border-bottom: 1px dashed #eee; }
.paid-link { display: flex; align-items: center; gap: 18px; padding: 15px 0; }
.paid-link .paid-title { flex: 1; font-size: 15px; color: #333; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.paid-link:hover .paid-title { color: var(--red); }
.paid-tag { flex: 0 0 auto; font-size: 11px; color: #b8860b; background: #fff8e6; border: 1px solid #f3e2b3; padding: 0 6px; line-height: 20px; }
.paid-date { flex: 0 0 92px; font-size: 12px; color: #999; text-align: right; }
.paid-fee { flex: 0 0 62px; text-align: right; font-size: 13px; color: var(--red); }
.paid-foot { margin-top: 18px; padding-top: 16px; border-top: 1px solid #f0f0f0; font-size: 12px; color: #999; line-height: 2; }
.paid-foot b { color: #555; }

/* ============ 商家入驻 ============ */
.merchant-hero { position: relative; height: 300px; overflow: hidden; background: #222; }
.merchant-hero img { width: 100%; height: 100%; object-fit: cover; opacity: .55; }
.merchant-hero .merchant-copy { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; color: #fff; }
.merchant-copy h1 { font-size: 38px; letter-spacing: 4px; font-weight: 700; }
.merchant-copy p { margin-top: 10px; font-size: 14px; color: rgba(255,255,255,.85); }
.merchant-copy .btn { margin-top: 26px; background: var(--red); }
.merchant-section { padding-top: 60px; }
.merchant-section .sec-head { text-align: center; margin-bottom: 36px; }
.merchant-section .sec-head h2 { font-size: 26px; color: #222; letter-spacing: 2px; }
.merchant-section .sec-head span { display: block; margin-top: 6px; font-size: 12px; letter-spacing: 3px; color: #bbb; text-transform: uppercase; }
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.step { border: 1px solid #ececec; padding: 30px 22px; text-align: center; position: relative; }
.step .num { width: 46px; height: 46px; line-height: 46px; margin: 0 auto 14px; border-radius: 50%; background: var(--red); color: #fff; font-size: 18px; font-weight: 700; }
.step h3 { font-size: 16px; color: #222; }
.step p { margin-top: 8px; font-size: 13px; color: #999; line-height: 1.9; }
.contact-box { margin-top: 10px; border: 1px solid #ececec; padding: 34px 36px; display: grid; grid-template-columns: 1fr 1fr; gap: 18px 40px; font-size: 14px; color: #666; }
.contact-box dt { color: #999; font-size: 12px; }
.contact-box dd { font-size: 15px; color: #222; }
.contact-box a:hover { color: var(--red); }

/* ============ 登录 / 注册 ============ */
.auth-wrap { padding: 60px 0 20px; }
.auth-card { width: 420px; max-width: 100%; margin: 0 auto; border: 1px solid #ececec; padding: 36px 38px 40px; }
.auth-card h1 { text-align: center; font-size: 22px; font-weight: 600; color: #222; }
.auth-card .auth-sub { text-align: center; margin: 6px 0 26px; font-size: 12px; color: #999; }
.auth-field { margin-bottom: 16px; }
.auth-field label { display: block; font-size: 13px; color: #777; margin-bottom: 6px; }
.auth-field input { width: 100%; height: 42px; border: 1px solid #ddd; padding: 0 14px; outline: 0; font-size: 14px; }
.auth-field input:focus { border-color: var(--red); }
.auth-card .btn { width: 100%; margin-top: 8px; }
.auth-switch { margin-top: 18px; text-align: center; font-size: 13px; color: #999; }
.auth-switch a { color: var(--red); }

/* ============ 弹窗 ============ */
.modal { position: fixed; inset: 0; z-index: 90; display: none; align-items: center; justify-content: center; padding: 20px; }
.modal.open { display: flex; }
.modal-mask { position: absolute; inset: 0; background: rgba(0, 0, 0, .5); }
.modal-card { position: relative; width: 360px; max-width: 100%; background: #fff; padding: 28px 26px; text-align: center; box-shadow: 0 20px 60px rgba(0, 0, 0, .2); }
.modal-card h3 { font-size: 17px; color: #222; padding-right: 20px; }
.modal-card .modal-desc { margin-top: 8px; font-size: 13px; color: #888; line-height: 1.8; }
.modal-card .modal-qr { width: 210px; height: 210px; object-fit: contain; margin: 16px auto 4px; }
.modal-card .modal-fee { font-size: 14px; color: #555; }
.modal-card .modal-fee b { color: var(--red); font-size: 22px; }
.modal-card .modal-contact { margin-top: 12px; padding-top: 12px; border-top: 1px dashed #eee; font-size: 12px; color: #999; line-height: 1.9; }
.modal-card .modal-contact b { color: #444; }
.modal-close { position: absolute; right: 10px; top: 8px; width: 30px; height: 30px; border: 0; background: none; font-size: 22px; line-height: 1; color: #999; }
.modal-close:hover { color: var(--red); }

/* ============ 响应式 ============ */
@media (max-width: 1100px) {
  .main-nav a { padding: 0 22px; }
  .card-grid { grid-template-columns: repeat(3, 1fr); }
  .product-track .product-card { flex-basis: calc((100% - 40px) / 3); }
  .detail-top { grid-template-columns: 380px 1fr; gap: 22px; }
  .paid-card { grid-template-columns: 320px 1fr; gap: 30px; }
}

@media (max-width: 900px) {
  .header-center .container { flex-wrap: wrap; gap: 16px; }
  .logo svg { height: 48px; }
  .header-search { order: 3; flex-basis: 100%; max-width: none; }
  .header-actions { margin-left: auto; gap: 20px; }
  .main-nav a { padding: 0 14px; font-size: 14px; height: 46px; line-height: 46px; }
  .hero-layout { grid-template-columns: 1fr; }
  .hero-side { grid-template-columns: 1fr 1fr; grid-template-rows: none; }
  .hero-banner { height: 150px; }
  .hero-slider { height: 300px; }
  .hero-copy { left: 30px; }
  .hero-copy h2 { font-size: 34px; }
  .card-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .slider-btn { display: none; }
  .product-track .product-card { flex-basis: calc((100% - 20px) / 2); }
  .list-layout { grid-template-columns: 1fr; }
  .hot-side { display: none; }
  .detail-wrap { grid-template-columns: 1fr; }
  .detail-side { display: none; }
  .detail-top { grid-template-columns: 1fr; }
  .paid-card { grid-template-columns: 1fr; }
  .paid-left { display: grid; grid-template-columns: 1fr 220px; gap: 20px; align-items: start; }
  .paid-left .paid-banner { height: 220px; }
  .qr-box { margin-top: 0; }
  .steps { grid-template-columns: 1fr 1fr; }
  .contact-box { grid-template-columns: 1fr; }
  .paid-link { flex-wrap: wrap; gap: 4px 12px; }
  .paid-link .paid-title { flex-basis: calc(100% - 80px); white-space: normal; }
  .paid-date { flex-basis: auto; text-align: left; }
}

@media (max-width: 600px) {
  .container { max-width: calc(100% - 24px); }
  .header-top .container span { font-size: 11px; }
  .header-center { padding: 14px 0; }
  .logo svg { height: 42px; }
  .header-actions { gap: 14px; }
  .hero-side { grid-template-columns: 1fr; }
  .hero-banner:last-child { display: none; }
  .hero-slider { height: 220px; }
  .hero-copy { left: 18px; max-width: 60%; }
  .hero-copy h2 { font-size: 26px; }
  .hero-copy p { font-size: 12px; margin: 6px 0 12px; }
  .hero-copy .btn { height: 34px; padding: 0 16px; font-size: 12px; }
  .section { padding-top: 44px; }
  .section-title { font-size: 22px; }
  .card-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .product-track { gap: 10px; }
  .product-track .product-card { flex-basis: calc((100% - 10px) / 2); }
  .product-card { padding: 8px; }
  .product-name { font-size: 12px; height: 38px; }
  .product-price { font-size: 15px; }
  .filter-row { align-items: flex-start; }
  .filter-row dt { flex-basis: 72px; padding-left: 12px; line-height: 34px; }
  .sort-tabs button { padding: 0 12px; }
  .detail-top { grid-template-columns: 1fr; }
  .price-box { flex-direction: column; }
  .buy-actions .btn { min-width: 0; flex: 1; }
  .paid-card { padding: 18px; }
  .paid-left { grid-template-columns: 1fr; }
  .paid-left .paid-banner { height: auto; }
  .qr-box img { width: 160px; height: 160px; }
  .steps { grid-template-columns: 1fr; }
  .tab-nav button { padding: 0 16px; font-size: 14px; }
}