/* ========== 全局 ========== */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: #333;
  background: #fff;
  line-height: 1.6;
}
a { text-decoration: none; color: inherit; }
ul, li { list-style: none; }
img { max-width: 100%; display: block; }

:root {
  --primary: #ff6a00;
  --primary-dark: #e55d00;
  --primary-light: #fff3e6;
  --text: #333;
  --text-light: #666;
  --text-lighter: #999;
  --border: #eee;
  --bg: #f8f8fa;
}

/* ========== 顶部导航 ========== */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  height: 70px;
  display: flex;
  align-items: center;
  padding: 0 20px;
}
.logo { display: flex; align-items: center; margin-right: 40px; }
.logo img { height: 40px; }
.logo-text { font-size: 22px; font-weight: 700; color: var(--primary); }

.main-nav { display: flex; flex: 1; gap: 8px; }
/* 汉堡菜单按钮（仅手机端显示） */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  margin-right: auto;
}
.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: .3s;
}
.menu-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.nav-item { position: relative; }
.nav-item > a {
  display: block;
  padding: 24px 16px;
  font-size: 15px;
  color: var(--text);
  transition: color .2s;
}
.nav-item > a:hover { color: var(--primary); }
.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  background: #fff;
  box-shadow: 0 6px 20px rgba(0,0,0,.08);
  border-radius: 8px;
  padding: 12px 0;
  min-width: 140px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all .2s;
}
.nav-item:hover .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.nav-dropdown a {
  display: block;
  padding: 10px 20px;
  font-size: 14px;
  color: var(--text-light);
  transition: all .2s;
}
.nav-dropdown a:hover { color: var(--primary); background: var(--primary-light); }

.header-right { display: flex; align-items: center; gap: 12px; }
.btn-login, .btn-register {
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 14px;
  transition: all .2s;
}
.btn-login { color: var(--text); }
.btn-login:hover { color: var(--primary); }
.btn-register {
  background: var(--primary);
  color: #fff;
}
.btn-register:hover { background: var(--primary-dark); }

/* 用户区块 */
.user-block {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  padding: 8px 12px;
  border-radius: 20px;
}
.user-block:hover { background: #f5f5f5; }
.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
}
.user-name { font-size: 14px; }
.user-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  background: #fff;
  box-shadow: 0 6px 20px rgba(0,0,0,.1);
  border-radius: 8px;
  padding: 8px 0;
  min-width: 140px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all .2s;
}
.user-block:hover .user-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.user-dropdown a {
  display: block;
  padding: 10px 16px;
  font-size: 14px;
  color: var(--text-light);
  transition: all .2s;
}
.user-dropdown a:hover { color: var(--primary); background: var(--primary-light); }

/* ========== Banner弹窗 ========== */
.banner-mask {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
}
.banner-popup {
  background: #fff;
  border-radius: 12px;
  width: 560px;
  max-width: 90vw;
  max-height: 80vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 60px rgba(0,0,0,.2);
}
.banner-popup-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.banner-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--primary);
}
.banner-close {
  font-size: 24px;
  cursor: pointer;
  color: var(--text-lighter);
  line-height: 1;
}
.banner-popup-body {
  padding: 24px;
  overflow-y: auto;
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.8;
}
.banner-popup-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

/* ========== 按钮 ========== */
.btn-primary {
  background: var(--primary);
  color: #fff;
  padding: 10px 24px;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  font-size: 14px;
  transition: all .2s;
  display: inline-block;
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-outline {
  background: #fff;
  color: var(--text-light);
  padding: 10px 24px;
  border-radius: 6px;
  border: 1px solid var(--border);
  cursor: pointer;
  font-size: 14px;
  transition: all .2s;
}
.btn-outline:hover { color: var(--primary); border-color: var(--primary); }
.btn-white {
  background: #fff;
  color: var(--primary);
  padding: 10px 24px;
  border-radius: 6px;
  font-size: 14px;
}
.btn-dark {
  background: #222;
  color: #fff;
  padding: 10px 24px;
  border-radius: 6px;
  font-size: 14px;
}

/* ========== 悬浮按钮 ========== */
.float-buttons {
  position: fixed;
  right: 16px;
  bottom: 80px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 50;
}
.float-btn {
  width: 44px;
  height: 44px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  cursor: pointer;
  position: relative;
  transition: all .2s;
}
.float-btn:hover { color: var(--primary); border-color: var(--primary); }
.float-popup {
  position: absolute;
  right: 56px;
  top: 0;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 6px 20px rgba(0,0,0,.1);
  padding: 12px;
  min-width: 180px;
  opacity: 0;
  visibility: hidden;
  transform: translateX(8px);
  transition: all .2s;
}
.float-btn:hover .float-popup {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
}
.cs-popup h4 { font-size: 14px; margin-bottom: 8px; color: var(--primary); }
.cs-popup p { font-size: 12px; color: var(--text-light); margin: 4px 0; }
.cs-qr { width: 140px; margin: 8px auto; border: 1px solid var(--border); }

/* ========== 页脚 ========== */
.site-footer { background: #1a1a1a; color: #ccc; margin-top: 60px; }
.footer-banner {
  background: linear-gradient(135deg, var(--primary), #ff8c33);
  padding: 50px 20px;
  text-align: center;
}
.footer-banner h2 {
  color: #fff;
  font-size: 26px;
  margin-bottom: 24px;
}
.footer-banner-btns { display: flex; gap: 16px; justify-content: center; }
.footer-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 50px 20px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1.5fr;
  gap: 30px;
}
.footer-brand .footer-logo { font-size: 22px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.footer-brand p { font-size: 13px; color: #888; }
.footer-col h5 { color: #fff; font-size: 15px; margin-bottom: 16px; }
.footer-col a, .footer-col p {
  display: block;
  font-size: 13px;
  color: #888;
  padding: 4px 0;
  transition: color .2s;
}
.footer-col a:hover { color: var(--primary); }
.footer-bottom {
  border-top: 1px solid #333;
  padding: 16px;
  text-align: center;
  font-size: 12px;
  color: #666;
}

/* ========== 首页区块 ========== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 60px 0; }
.section-title {
  font-size: 28px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
  color: var(--text);
}
.section-subtitle {
  text-align: center;
  color: var(--text-lighter);
  font-size: 14px;
  margin-bottom: 40px;
}

/* Hero */
.hero {
  background: linear-gradient(135deg, #fff8f0, #fff);
  padding: 80px 0;
  text-align: center;
}
.hero h1 {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text);
}
.hero p { color: var(--text-light); margin-bottom: 40px; }
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 80px;
  margin-top: 50px;
}
.hero-stat .num {
  font-size: 36px;
  font-weight: 700;
  color: var(--primary);
}
.hero-stat .label { font-size: 13px; color: var(--text-lighter); }

/* 商品网格 */
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.product-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  position: relative;
  transition: box-shadow .2s;
  cursor: pointer;
}
.product-card:hover { box-shadow: 0 8px 24px rgba(0,0,0,.1); }
.product-img-wrap {
  position: relative;
  width: 100%;
  padding-top: 100%;
  overflow: hidden;
}
.product-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #fafafa;
  padding: 12px;
}
.product-overlay {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 0;
  background: rgba(255, 106, 0, .92);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  font-weight: 600;
  overflow: hidden;
  transition: height .3s ease;
}
.product-overlay img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.product-overlay span {
  position: relative;
  z-index: 2;
  text-shadow: 0 1px 4px rgba(0,0,0,.3);
}
.product-card:hover .product-overlay { height: 100%; }
.product-info { padding: 12px 14px; }
.product-name {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.product-meta {
  font-size: 12px;
  color: var(--text-lighter);
  margin-bottom: 8px;
}
.product-price {
  color: var(--primary);
  font-size: 16px;
  font-weight: 700;
}

/* ========== 分页 ========== */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 40px;
}
.pagination a, .pagination span {
  min-width: 36px;
  height: 36px;
  padding: 0 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  color: var(--text-light);
  cursor: pointer;
  transition: all .2s;
}
.pagination a:hover { color: var(--primary); border-color: var(--primary); }
.pagination .active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* ========== 分类筛选 ========== */
.filter-bar {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 20px;
  margin-bottom: 24px;
}
.filter-row {
  display: flex;
  align-items: flex-start;
  padding: 8px 0;
  border-bottom: 1px dashed var(--border);
}
.filter-row:last-child { border-bottom: none; }
.filter-label {
  width: 80px;
  color: var(--text-lighter);
  font-size: 14px;
  flex-shrink: 0;
}
.filter-options { display: flex; flex-wrap: wrap; gap: 8px; }
.filter-options a {
  padding: 4px 14px;
  border-radius: 16px;
  font-size: 13px;
  color: var(--text-light);
  transition: all .2s;
}
.filter-options a:hover, .filter-options a.active {
  background: var(--primary);
  color: #fff;
}

/* ========== 商品详情 ========== */
.detail-wrap { padding: 30px 0; }
.detail-main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  background: #fff;
  padding: 30px;
  border-radius: 10px;
  border: 1px solid var(--border);
}
.detail-gallery .main-img {
  width: 100%;
  background: #fafafa;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 30px;
  min-height: 300px;
}
.detail-gallery .main-img img { max-height: 280px; }
.detail-info h1 {
  font-size: 22px;
  margin-bottom: 12px;
}
.detail-tags { margin-bottom: 16px; }
.tag {
  display: inline-block;
  padding: 2px 10px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 4px;
  font-size: 12px;
  margin-right: 8px;
}
.tag-blue {
  background: #e6f0ff;
  color: #1890ff;
}
.tag-green {
  background: #e8f8e8;
  color: #52c41a;
}
.product-tags {
  margin: 4px 0;
}
.product-tags .tag {
  margin: 0 4px 4px 0;
  padding: 1px 8px;
  font-size: 11px;
}
.detail-meta {
  font-size: 14px;
  color: var(--text-light);
  margin-bottom: 24px;
  line-height: 2;
}
.buy-box {
  background: var(--primary-light);
  border-radius: 10px;
  padding: 24px;
  margin-top: 20px;
}
.buy-box .price-label { font-size: 13px; color: var(--text-light); }
.buy-box .price {
  font-size: 32px;
  color: var(--primary);
  font-weight: 700;
  margin: 8px 0;
}
.buy-now {
  width: 100%;
  background: var(--primary);
  color: #fff;
  padding: 14px;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all .2s;
}
.buy-now:hover { background: var(--primary-dark); }

.detail-tabs {
  margin-top: 30px;
  background: #fff;
  border-radius: 10px;
  border: 1px solid var(--border);
  overflow: hidden;
}
.tab-nav {
  display: flex;
  border-bottom: 1px solid var(--border);
}
.tab-nav a {
  padding: 16px 28px;
  font-size: 15px;
  color: var(--text-light);
  border-bottom: 2px solid transparent;
  transition: all .2s;
}
.tab-nav a.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  font-weight: 600;
}
.tab-content { padding: 30px; }
.tab-pane { display: none; }
.tab-pane.active { display: block; }

/* ========== 登录/注册 ========== */
.auth-page {
  min-height: 100vh;
  background: linear-gradient(135deg, #fff8f0, #fff);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.auth-card {
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 10px 40px rgba(0,0,0,.08);
  padding: 40px;
  width: 420px;
}
.auth-card h2 { text-align: center; margin-bottom: 30px; color: var(--text); }
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-size: 14px;
  color: var(--text-light);
  margin-bottom: 6px;
}
.form-control {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  transition: border-color .2s;
  outline: none;
}
.form-control:focus { border-color: var(--primary); }
.captcha-row { display: flex; gap: 10px; }
.captcha-row .form-control { flex: 1; }
.captcha-img {
  height: 44px;
  border-radius: 8px;
  cursor: pointer;
  border: 1px solid var(--border);
}
.code-row { display: flex; gap: 10px; }
.code-row .form-control { flex: 1; }
.btn-code {
  padding: 0 16px;
  border: 1px solid var(--primary);
  color: var(--primary);
  background: #fff;
  border-radius: 8px;
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
}
.btn-code:disabled { opacity: .5; cursor: not-allowed; }
.auth-submit {
  width: 100%;
  background: var(--primary);
  color: #fff;
  padding: 13px;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
  margin-top: 10px;
}
.auth-submit:hover { background: var(--primary-dark); }
.auth-link {
  text-align: center;
  margin-top: 20px;
  font-size: 14px;
  color: var(--text-light);
}
.auth-link a { color: var(--primary); }

/* ========== 通用表单/表格 ========== */
.alert {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 14px;
}
.alert-error { background: #fee; color: #c33; border: 1px solid #fcc; }
.alert-success { background: #efe; color: #3a3; border: 1px solid #cfc; }

/* ========== 用户中心 ========== */
.uc-layout { display: flex; gap: 20px; }
.uc-sidebar {
  width: 180px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  height: fit-content;
}
.uc-sidebar a {
  display: block;
  padding: 10px 12px;
  border-radius: 6px;
  color: var(--text-light);
  font-size: 14px;
  transition: .2s;
}
.uc-sidebar a:hover { color: var(--primary); }
.uc-content {
  flex: 1;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  min-width: 0;
}
@media (max-width: 768px) {
  .uc-layout { flex-direction: column; gap: 12px; }
  .uc-sidebar {
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    padding: 8px;
  }
  .uc-sidebar a { padding: 8px 12px; font-size: 13px; flex: 1; text-align: center; min-width: 80px; }
  .uc-content { padding: 16px; }
  .uc-content table { display: block; overflow-x: auto; white-space: nowrap; }
}


/* ========== 响应式 ========== */
/* 平板：≤1024px */
@media (max-width: 1024px) {
  .header-inner { padding: 0 16px; height: 60px; }
  .logo { margin-right: 20px; }
  .logo-text { font-size: 18px; }
  .nav-item > a { padding: 20px 12px; font-size: 14px; }
  .container { padding: 0 16px; }
  .product-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }
  .hero-stats { flex-wrap: wrap; gap: 30px; }
  .detail-main { grid-template-columns: 1fr; }
}

/* 手机：≤768px */
@media (max-width: 768px) {
  .header-inner { height: 56px; padding: 0 12px; gap: 8px; }
  .logo { margin-right: 0; }
  .logo-text { font-size: 17px; }
  .menu-toggle { display: flex; }
  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    border-top: 1px solid var(--border);
    box-shadow: 0 4px 12px rgba(0,0,0,.08);
    padding: 8px 0;
    z-index: 99;
  }
  .main-nav.show { display: flex; }
  .nav-item { width: 100%; }
  .nav-item > a { padding: 12px 20px; font-size: 15px; }
  .nav-dropdown {
    position: static;
    box-shadow: none;
    border-radius: 0;
    border-top: 1px solid var(--border);
    padding: 4px 0;
    display: none;
  }
  .nav-item:hover .nav-dropdown { display: block; }
  .nav-dropdown a { padding: 10px 30px; font-size: 14px; }
  .user-area .user-dropdown-toggle { font-size: 13px; }
  .container { padding: 0 12px; }

  .product-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .product-name { font-size: 13px; }
  .product-price { font-size: 16px; }

  .hero-section { padding: 40px 0; }
  .hero-title { font-size: 26px; }
  .hero-desc { font-size: 14px; }
  .hero-stats { gap: 16px; }
  .hero-stat .num { font-size: 24px; }
  .hero-stat .label { font-size: 12px; }

  .section { padding: 30px 0; }
  .section-title { font-size: 20px; margin-bottom: 16px; }

  .detail-main { grid-template-columns: 1fr; gap: 16px; }
  .detail-info h1 { font-size: 20px; }
  .price { font-size: 28px; }
  .buy-now { width: 100%; }

  .footer-main { grid-template-columns: 1fr; gap: 16px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }

  .filter-bar { flex-direction: column; align-items: stretch; gap: 8px; }
  .pagination { flex-wrap: wrap; gap: 4px; }
  .pagination a, .pagination span { min-width: 32px; height: 32px; font-size: 13px; }

  .captcha-row { flex-direction: column; align-items: stretch; }
  .captcha-row img { width: 100%; height: 42px; object-fit: cover; }
  .btn-primary { padding: 12px 20px; font-size: 14px; }

  /* 防止移动端输入时页面放大 */
  input, select, textarea { font-size: 16px !important; }

  /* 表格横向滚动 */
  .tab-pane table, .detail-info table { display: block; overflow-x: auto; white-space: nowrap; }

  .auth-box { width: 100%; max-width: 360px; padding: 24px 16px; }
}

/* 小屏手机：≤480px */
@media (max-width: 480px) {
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .logo-text { font-size: 15px; }
  .hero-title { font-size: 22px; }
  .detail-info h1 { font-size: 18px; }
  .price { font-size: 24px; }
  .tag { font-size: 11px; padding: 1px 6px; }
}

/* 后台响应式 */
@media (max-width: 900px) {
  .admin-layout { flex-direction: column; }
  .admin-sidebar { width: 100%; position: relative; height: auto; padding: 8px; overflow-x: auto; white-space: nowrap; }
  .admin-sidebar a { display: inline-block; padding: 8px 12px; font-size: 13px; }
  .admin-main { padding: 12px; }
  .admin-topbar { padding: 10px 12px; }
  .admin-table { font-size: 13px; }
  .admin-table th, .admin-table td { padding: 8px 6px; }
  .form-row { flex-direction: column; align-items: stretch; }
  .form-row label { margin-bottom: 4px; }
}
@media (max-width: 600px) {
  .admin-table-wrapper { overflow-x: auto; }
  .admin-table { min-width: 600px; }
  .tabs { flex-wrap: wrap; }
  .tabs a { padding: 8px 12px; font-size: 13px; }
}