:root {
  --primary: #0d9488;
  --primary-dark: #0f766e;
  --primary-light: #ccfbf1;
  --accent: #14b8a6;
  --bg: #f6f8f7;
  --card: #ffffff;
  --text: #1f2937;
  --text-sub: #6b7280;
  --border: #e5e7eb;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
  --shadow-hover: 0 8px 28px rgba(13, 148, 136, 0.12);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
img { display: block; max-width: 100%; }
[hidden] { display: none !important; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; font-family: inherit; }
.container { max-width: 1160px; margin: 0 auto; padding: 0 20px; }

/* 按钮 */
.btn-primary {
  background: var(--primary);
  color: #fff;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  transition: background .2s, transform .2s;
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); }
.btn-ghost {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
}
.btn-ghost:hover { background: var(--primary-light); }
.btn-outline {
  background: #fff;
  color: var(--primary);
  border: 1px solid var(--border);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
}
.btn-outline:hover { border-color: var(--primary); }
.btn-sm { padding: 6px 14px; font-size: 13px; }

/* 顶部导航 */
.header {
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(6px);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 24px;
}
.logo { display: flex; align-items: center; gap: 6px; font-size: 22px; font-weight: 800; }
.logo-mark {
  background: var(--primary);
  color: #fff;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 18px;
}
.logo-text { color: var(--text); }
.nav-links { display: flex; gap: 28px; font-size: 15px; color: var(--text-sub); }
.nav-links a:hover { color: var(--primary); }

/* 专属页（/ ?ep=令牌）：与首页共用同一套布局，仅数据按专属页范围受限 */
.logo-img { height: 34px; width: auto; border-radius: 6px; display: block; }
.logo-name { font-size: 19px; font-weight: 800; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 320px; }
.company-strip {
  background: linear-gradient(90deg, var(--primary-light), #fff);
  border-bottom: 1px solid var(--border);
  padding: 10px 0;
}
.company-strip-inner { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.company-strip .cs-logo { width: 40px; height: 40px; border-radius: 10px; overflow: hidden; background: #fff; display: flex; align-items: center; justify-content: center; font-weight: 800; color: var(--primary); flex: none; }
.company-strip .cs-logo img { width: 100%; height: 100%; object-fit: cover; }
.company-strip .cs-name { font-size: 16px; font-weight: 700; }
.company-strip .cs-meta { font-size: 13px; color: var(--text-sub); display: flex; gap: 14px; flex-wrap: wrap; }
.ep-empty {
  padding: 80px 0;
  text-align: center;
  color: var(--text-sub);
}
.ep-empty a { color: var(--primary); }

/* 专属页搜索行（/?ep= 模式：轮播图下一行，白色背景卡片，搜索框+按钮总长与轮播图一致） */
.ep-search-row { display: flex; justify-content: center; background: #fff; padding: 8px 20px; }
.ep-search-row .search-bar { width: 100%; }
.ep-search-row .search-bar input { flex: 1; width: auto; min-width: 0; }
/* 专属页：信息条/轮播行/搜索行整行通栏白底，内容仍由 container 对齐轮播宽度 */
body.ep-mode .company-strip { background: #fff; border: none; }
body.ep-mode #hero { background: #fff; }
.ep-search-outer { background: #fff; }

/* 轮播图 */
.hero { padding: 28px 0 10px; }
.carousel {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  height: 480px; /* PC 端加高，尽量适配横版图片（移动端断点单独收窄） */
}
.carousel-track { display: flex; height: 100%; transition: transform .6s ease; }
.carousel-slide {
  min-width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  position: relative;
  display: flex;
  align-items: center;
}
.carousel-slide::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(0,0,0,0.55) 0%, rgba(0,0,0,0.15) 60%, transparent 100%);
}
.slide-content {
  position: relative;
  z-index: 2;
  color: #fff;
  max-width: 520px;
  padding: 0 8%;
}
.slide-content h3 { font-size: 34px; font-weight: 700; line-height: 1.2; margin-bottom: 10px; }
.slide-content p { font-size: 16px; opacity: .9; margin-bottom: 22px; }
.carousel-dots {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
}
.dot { width: 10px; height: 10px; border-radius: 50%; background: rgba(255,255,255,.5); cursor: pointer; transition: .2s; }
.dot.active { background: #fff; width: 24px; border-radius: 6px; }
/* 维护了跳转链接的轮播：整张图可点击（锚点样式重置） */
a.carousel-slide { text-decoration: none; }
.carousel-slide.has-link { cursor: pointer; }

/* 通用区块 */
.section { padding: 56px 0; }
.section-head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 28px; flex-wrap: wrap; }
.section-head.center { justify-content: center; flex-direction: column; align-items: center; text-align: center; }
.section-head.split { justify-content: space-between; align-items: center; }
.section-head h2 { font-size: 26px; font-weight: 700; }
.section-head p { color: var(--text-sub); font-size: 15px; }

/* 分类 */
.categories { background: #fff; }
.category-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 16px;
}
.category-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 14px;
  text-align: center;
  transition: .2s;
}
.category-item:hover { border-color: var(--primary); box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.cat-icon { font-size: 28px; display: block; margin-bottom: 8px; }
/* 分类图标为上传图片时：统一按系统图标大小（28px）缩放展示，contain 不变形 */
.cat-icon-img {
  width: 28px; height: 28px; object-fit: contain;
  display: block; margin: 0 auto;
}
.cat-name { font-size: 15px; font-weight: 600; }
.cat-count { font-size: 12px; color: var(--text-sub); display: block; margin-top: 2px; }

/* 促销 */
.promo-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}
.promo-card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
  transition: .2s;
}
.promo-card:hover { box-shadow: var(--shadow-hover); }
.promo-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
.promo-head h3 { font-size: 18px; color: var(--primary-dark); }
.countdown {
  background: var(--primary-dark);
  color: #fff;
  font-size: 13px;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-variant-numeric: tabular-nums;
}
.promo-sub { color: var(--text-sub); font-size: 13px; margin-bottom: 14px; }
.promo-products { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.promo-product { cursor: pointer; }
.promo-product img { width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: var(--radius-sm); background: var(--bg); }
.promo-product-name { font-size: 13px; margin-top: 6px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.promo-coupons { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 14px; }
.coupon {
  border: 1px dashed var(--accent);
  color: var(--accent);
  background: #f0fdfa;
  border-radius: 6px;
  padding: 4px 12px;
  font-size: 12px;
}

/* 价格（促销等模块共用） */
.price-row { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.price-now { color: var(--primary); font-weight: 700; font-size: 18px; }
.price-old { color: #b0b5bd; font-size: 13px; text-decoration: line-through; }
.sales-badge { color: var(--text-sub); font-size: 13px; }

/* 商品网格 */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}
.product-card {
  background: var(--card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: transform .2s, box-shadow .2s;
  display: flex;
  flex-direction: column;
}
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.card-img { position: relative; }
.card-img img { width: 100%; aspect-ratio: 1; object-fit: cover; }
.video-badge, .hot-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(0,0,0,.65);
  color: #fff;
  font-size: 12px;
  padding: 4px 8px;
  border-radius: 4px;
}
.hot-badge { left: auto; right: 10px; background: #e11d48; }
.card-body { padding: 14px; display: flex; flex-direction: column; flex: 1; }
.card-name { font-size: 15px; font-weight: 600; line-height: 1.35; margin-bottom: 8px; }
.card-meta { display: flex; align-items: center; justify-content: space-between; margin-top: auto; padding-top: 10px; }
.card-price { color: var(--primary-dark); font-weight: 700; font-size: 16px; }
.card-sales { color: var(--text-sub); font-size: 12px; }
.card-btn { margin-top: 12px; width: 100%; }

/* 目录 */
.catalog { background: #fff; }
.catalog-tabs { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 22px; }
.catalog-tab {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 8px 18px;
  border-radius: 20px;
  font-size: 14px;
  color: var(--text-sub);
}
.catalog-tab:hover { border-color: var(--primary); color: var(--primary); }
.catalog-tab.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.search-bar { display: flex; gap: 0; border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; }
.search-bar input { border: none; outline: none; padding: 9px 14px; font-size: 14px; width: 220px; }
.search-bar button { background: var(--primary); color: #fff; padding: 0 18px; font-size: 14px; }
.empty-tip { text-align: center; color: var(--text-sub); padding: 50px 0; }

/* 弹窗 */
.modal-mask {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.45);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal-mask[hidden] { display: none; }
.modal {
  background: var(--card);
  border-radius: var(--radius);
  max-width: 920px;
  width: 100%;
  max-height: 90vh;
  overflow: auto;
  position: relative;
  box-shadow: 0 20px 50px rgba(0,0,0,.2);
  padding: 28px;
}
.modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg);
  color: var(--text-sub);
  font-size: 18px;
  z-index: 2;
}
.modal-close:hover { background: var(--primary-light); color: var(--primary-dark); }
.modal-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.modal-media video { width: 100%; border-radius: var(--radius-sm); background: #000; aspect-ratio: 16/9; }
.modal-thumbs { display: flex; gap: 8px; margin-top: 10px; overflow-x: auto; }
.modal-thumbs img { width: 64px; height: 64px; object-fit: cover; border-radius: 6px; border: 2px solid transparent; cursor: pointer; }
.modal-thumbs img:hover { border-color: var(--primary); }
.modal-info h3 { font-size: 22px; margin-bottom: 10px; }
.modal-price { margin-bottom: 14px; }
.modal-desc { color: var(--text-sub); font-size: 14px; margin-bottom: 18px; }
.modal-actions { margin-top: 22px; }
.qty-row { display: flex; align-items: center; gap: 10px; }
.qty-btn { width: 32px; height: 32px; border: 1px solid var(--border); border-radius: 6px; background: #fff; font-size: 16px; }
.qty-input { width: 56px; height: 32px; text-align: center; border: 1px solid var(--border); border-radius: 6px; font-size: 14px; }
.stock-tip { font-size: 12px; color: var(--text-sub); }

/* 提示 */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(31,41,55,.92);
  color: #fff;
  padding: 10px 22px;
  border-radius: 24px;
  font-size: 14px;
  z-index: 300;
}

/* 页脚 */
.footer {
  background: #fff;
  border-top: 1px solid var(--border);
  padding: 30px 0;
  text-align: center;
  color: var(--text-sub);
  font-size: 14px;
}
.footer-links { margin-top: 8px; }
.footer a { color: var(--primary); }
.icp-line { margin-top: 6px; font-size: 12px; color: var(--text-sub); }
.icp-line a { color: inherit; text-decoration: none; }
.icp-line a:hover { color: var(--primary); }

/* 响应式 */
@media (max-width: 768px) {
  .header-inner { flex-wrap: wrap; height: auto; padding: 12px 0; }
  .nav-links { display: none; }
  .carousel { height: 260px; }
  .slide-content h3 { font-size: 22px; }
  .modal-grid { grid-template-columns: 1fr; }
  .section-head.split { flex-direction: column; align-items: flex-start; gap: 12px; }
}

/* ===================== 商品详情页 ===================== */
.detail-page { padding: 20px 0 48px; }

.breadcrumb {
  font-size: 13px;
  color: var(--text-sub);
  padding: 6px 0 16px;
}
.breadcrumb a { color: var(--primary); }
.breadcrumb a:hover { text-decoration: underline; }

.detail-card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px 28px;
  margin-bottom: 20px;
}

.detail-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  border-left: 4px solid var(--primary);
  padding-left: 10px;
  margin-bottom: 18px;
}

/* 视频（视频展示区 / 安装指引区共用：PC 端限宽居中） */
.detail-video video,
#guideVideo {
  display: block;
  width: 100%;
  max-width: 900px; /* PC 端与主图宽度一致并居中 */
  margin: 14px auto 0;
  max-height: 640px;
  border-radius: var(--radius-sm);
  background: #000;
}
/* 视频区上部：商品主图（PC 端限宽居中，完整展示不裁切） */
.video-main {
  position: relative;
  width: 100%;
  max-width: 900px; /* PC 端限制最大宽度并居中，移动端自然撑满 */
  margin: 0 auto;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg);
}
.video-main img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: contain; /* 完整展示原图，不裁剪 */
  max-height: 640px;
}
.video-main-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.55);
  color: #fff;
  font-size: 13px;
  letter-spacing: 1px;
  backdrop-filter: blur(4px);
}
.video-empty {
  text-align: center;
  color: var(--text-sub);
  padding: 48px 0;
  background: var(--bg);
  border-radius: var(--radius-sm);
}

/* 基本信息 */
.detail-name {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
}
.detail-desc {
  color: var(--text-sub);
  font-size: 14px;
  margin-bottom: 18px;
}
.info-rows {
  border-top: 1px solid var(--border);
}
.info-row {
  display: flex;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.info-key {
  width: 88px;
  flex-shrink: 0;
  color: var(--text-sub);
}
.info-val { color: var(--text); }

/* 规格与价格 */
.spec-table-block { margin-bottom: 20px; }
.spec-table-block:last-child { margin-bottom: 0; }
.spec-table-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary-dark);
  margin-bottom: 8px;
}
.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.spec-table th,
.spec-table td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.spec-table th {
  background: var(--primary-light);
  color: var(--primary-dark);
  font-weight: 600;
}
.spec-table tbody tr:last-child td { border-bottom: none; }
.spec-table tbody tr:hover { background: #fafdfc; }
.spec-price {
  color: #dc2626;
  font-weight: 700;
  white-space: nowrap;
}
.spec-cost {
  color: #6d28d9;
  font-weight: 600;
  white-space: nowrap;
}

/* 图片展示 */
.detail-images {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
}
.detail-img-item {
  margin: 0;
  display: flex;
  flex-direction: column;
}
.detail-img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  cursor: zoom-in;
  transition: transform .2s, box-shadow .2s;
  background: var(--bg);
}
.detail-img:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}
/* 实拍图标题：显示在图片正下方，最多两行 */
.detail-img-title {
  margin-top: 8px;
  text-align: center;
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.45;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  word-break: break-all;
}

/* 图片放大预览 */
.img-viewer {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .82);
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
  cursor: zoom-out;
}
.img-viewer img {
  max-width: 100%;
  max-height: 100%;
  border-radius: var(--radius-sm);
}

@media (max-width: 768px) {
  .detail-card { padding: 18px 16px; }
  .detail-name { font-size: 20px; }
  .info-key { width: 68px; }
  .detail-images { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
}

/* ===================== 回到顶部 ===================== */
.back-top {
  position: fixed;
  right: 22px;
  bottom: 26px;
  z-index: 150; /* 高于页头(100)、低于弹窗遮罩(200)与图片预览(3000)，弹窗打开时自动被覆盖 */
  width: 46px;
  height: 46px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  color: var(--primary-dark);
  border: 1px solid var(--border);
  box-shadow: 0 6px 18px rgba(15, 118, 110, 0.18);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity .25s ease, transform .25s ease, visibility .25s ease, background .2s, color .2s;
}
.back-top:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.back-top.show {
  opacity: 1;
  visibility: visible;
  transform: none;
}
.back-top:active { transform: scale(0.94); }

/* ===================== 移动端适配增强 ===================== */
@media (max-width: 768px) {
  /* 回到顶部按钮缩小、下移避开底部手势区 */
  .back-top { right: 14px; bottom: calc(16px + env(safe-area-inset-bottom, 0px)); width: 42px; height: 42px; }

  /* 容器与区块留白收窄 */
  .container { padding: 0 16px; }
  .section { padding: 38px 0; }
  .section-head { margin-bottom: 20px; }
  .section-head h2 { font-size: 22px; }
  .hero { padding: 16px 0 6px; }

  /* 页头：导航不隐藏，改为紧凑同行，便于手机上锚点跳转 */
  .header-inner { gap: 12px; }
  .logo { font-size: 19px; }
  .logo-mark { font-size: 15px; padding: 3px 8px; }
  .nav-links { display: flex; gap: 14px; font-size: 13px; }
  .logo-name { max-width: 150px; font-size: 17px; }

  /* 轮播与文案缩放 */
  .carousel { height: 230px; }
  .slide-content h3 { font-size: 22px; }
  .slide-content p { font-size: 14px; margin-bottom: 14px; }

  /* 专属页公司信息条紧凑（/ ?ep=令牌 模式） */
  .company-strip { padding: 8px 0; }
  .company-strip-inner { gap: 10px; }
  .company-strip .cs-logo { width: 32px; height: 32px; border-radius: 8px; }
  .company-strip .cs-name { font-size: 14px; }
  .company-strip .cs-meta { font-size: 12px; gap: 8px; }
  .logo-img { height: 28px; }

  /* 分类两列 */
  .category-list { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .category-item { padding: 16px 10px; }

  /* 商品卡两列紧凑布局 */
  .product-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .card-body { padding: 10px; }
  .card-name { font-size: 13px; margin-bottom: 6px; }
  .card-meta { padding-top: 6px; }
  .card-price { font-size: 15px; }
  .card-sales { font-size: 11px; }
  .card-btn { margin-top: 8px; font-size: 13px; padding: 7px 10px; }

  /* 促销单列、副信息紧凑 */
  .promo-list { grid-template-columns: 1fr; gap: 14px; }
  .promo-card { padding: 16px; }

  /* 搜索条占满整行，输入框自适应伸缩 */
  .search-bar { width: 100%; }
  .search-bar input { flex: 1; width: auto; min-width: 0; }
  .catalog-tab { padding: 7px 14px; font-size: 13px; }

  /* 详情页 */
  .detail-page { padding: 12px 0 36px; }
  .detail-images { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  /* 规格表允许横向滚动，避免窄屏挤压换行 */
  .spec-table-block { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .spec-table { min-width: 420px; }
  .spec-table th, .spec-table td { padding: 8px 10px; font-size: 13px; }
}

@media (max-width: 480px) {
  .container { padding: 0 12px; }
  .section { padding: 30px 0; }
  .carousel { height: 190px; }
  .category-list { gap: 10px; }
  .product-grid { gap: 10px; }
  .product-card .card-body { padding: 8px; }
  .card-name { font-size: 12px; }
  .card-price { font-size: 14px; }
  .spec-table { min-width: 360px; }
  .back-top { width: 40px; height: 40px; }
  .company-strip .cs-name { font-size: 13px; }
  .company-strip .cs-meta { gap: 6px; }
}