:root {
  --navbar-height: 64px;
  --nav-mobile-mallbar-height: 0px;
  --blue-500: #2b6cb0;
  --gray-100: #f7f8fa;
  --gray-50: #f9fafb;
  --gray-200: #edf0f5;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #6b7280;
  --gray-800: #1f2937;
  --gray-700: #374151;
  --gray-900: #111827;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

.container {
  max-width: 1450px;
  margin: 0 auto;
  padding: 0 20px;
}

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--navbar-height);
  background-color: var(--gray-100);
  z-index: 1000;
  transition: box-shadow var(--transition-normal);
}

.navbar.scrolled {
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

.nav-mobile-mallbar {
  display: none;
}

.navbar .container {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.navbar .logo {
  font-size: 30px;
  font-weight: 700;
  color: #333333;
  letter-spacing: 1px;
  flex-shrink: 0;
  text-decoration: none;
  display: flex;
  align-items: center;
}

.navbar .logo span {
  color: var(--blue-500);
}

.navbar .nav-menu {
  position: absolute;
  left: 0;
  right: 0;
  justify-content: center;
  display: flex;
  align-items: center;
  gap: 36px;
  height: 100%;
  /* 导航条整行铺满容器宽度；空白区域不拦截点击，让 logo 与右侧操作区可点 */
  pointer-events: none;
}

.navbar .nav-menu > a,
.navbar .nav-menu .nav-dropdown {
  pointer-events: auto;
}

.navbar .nav-menu > a,
.navbar .nav-menu .dropdown-trigger {
  position: relative;
  font-size: 14px;
  color: var(--gray-700);
  letter-spacing: 1px;
  height: 100%;
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: color var(--transition-fast);
  cursor: pointer;
  background: none;
  border: none;
  font-family: inherit;
}

.navbar .nav-menu > a::after,
.navbar .nav-menu .dropdown-trigger::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background-color: var(--blue-500);
  transition: width var(--transition-normal);
}

.navbar .nav-menu > a:hover,
.navbar .nav-menu .dropdown-trigger:hover {
  color: var(--blue-500);
}

.navbar .nav-menu > a:hover::after,
.navbar .nav-menu .dropdown-trigger:hover::after {
  width: 100%;
}

.nav-dropdown {
  position: static;
  height: 100%;
  display: flex;
  align-items: center;
}

.navbar .nav-dropdown .dropdown-trigger {
  flex-direction: row-reverse;
  gap: 6px;
}

.navbar .nav-dropdown .dropdown-trigger::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
  margin-top: -3px;
  transition: transform var(--transition-fast);
}

.nav-dropdown:hover .dropdown-trigger::before {
  transform: rotate(-135deg);
  margin-top: 2px;
}

.nav-dropdown:hover .dropdown-trigger {
  color: var(--blue-500);
}

.nav-dropdown:hover .dropdown-trigger::after {
  width: 100%;
}

.dropdown-menu {
  position: fixed;
  top: var(--navbar-height);
  left: 0;
  right: 0;
  width: 100%;
  max-height: min(560px, calc(100vh - var(--navbar-height) - 24px));
  background: #fff;
  border-top: 1px solid var(--gray-200);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-8px);
  transition: opacity 0.18s ease, visibility 0.18s ease, transform 0.18s ease;
  z-index: 1001;
  box-shadow: 0 18px 45px rgba(17, 24, 39, 0.12);
  overflow: hidden;
}

.nav-dropdown.is-open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

.nav-dropdown.dropdown-closed .dropdown-menu {
  opacity: 0 !important;
  visibility: hidden !important;
  pointer-events: none !important;
  transform: translateY(-8px) !important;
}

.dropdown-menu::before {
  content: '';
  position: absolute;
  top: -10px;
  left: 0;
  right: 0;
  height: 10px;
}

.product-dropdown-menu .dropdown-container {
  display: flex;
  width: min(1500px, calc(100% - 48px));
  height: min(560px, calc(100vh - var(--navbar-height) - 24px));
  margin: 0 auto;
}



.dropdown-menu .dd-left {
  width: 248px;
  flex-shrink: 0;
  padding: 24px 20px 24px 0;
  border-right: 1px solid var(--gray-200);
  background: var(--gray-50);
  overflow-y: auto;
  /* 滚到列尽头后不把滚动传给页面，避免下拉打开时误滚正文 */
  overscroll-behavior: contain;
}

.dropdown-menu .dd-column-header,
.dropdown-menu .dd-middle-header {
  margin: 0 12px 12px;
  color: var(--gray-400);
  font-size: 11px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 1.5px;
}

.dropdown-menu .dd-cat {
  display: flex;
  min-height: 42px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-right: -20px;
  padding: 10px 12px;
  border-radius: 6px;
  color: var(--gray-700);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.5;
  text-decoration: none;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.dropdown-menu .dd-cat svg {
  width: 16px;
  height: 16px;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0.45;
}

.dropdown-menu .dd-cat:hover,
.dropdown-menu .dd-cat:focus-visible,
.dropdown-menu .dd-cat.active {
  background: var(--blue-500);
  color: #fff;
  outline: none;
}
.dropdown-menu .dd-middle {
  min-width: 0;
  width: auto;
  flex: 1;
  padding: 24px 44px 28px 28px;
  border-right: none;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.dropdown-menu .dd-middle .dd-products-grid {
  grid-template-columns: repeat(auto-fill, minmax(148px, 1fr));
}

.dropdown-menu .dd-mobile-back,
.dropdown-menu .dd-mobile-back-cards,
.dropdown-menu .dd-mobile-title,
.dropdown-menu .dd-view-all-middle {
  display: none;
}

.dropdown-menu .dd-right {
  min-width: 0;
  flex: 1;
  padding: 24px 44px 28px 28px;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.dropdown-menu .dd-right-header {
  display: flex;
  min-height: 28px;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 18px;
}

.dropdown-menu .dd-right-heading,
.dropdown-menu .dd-middle-heading {
  min-width: 0;
}

.dropdown-menu .dd-right-kicker {
  display: block;
  margin-bottom: 3px;
  color: var(--gray-400);
  font-size: 11px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 1.5px;
}

.dropdown-menu .dd-right-title,
.dropdown-menu .dd-middle-title {
  display: block;
  overflow: hidden;
  color: #333333;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dropdown-menu .dd-view-all {
  display: inline-flex;
  flex: none;
  align-items: center;
  gap: 6px;
  padding: 5px 0;
  color: var(--blue-500);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
}

.dropdown-menu .dd-view-all:hover,
.dropdown-menu .dd-view-all:focus-visible {
  color: #1a4971;
  outline: none;
}

/* 自适应列宽：铺满右栏宽度，避免固定 175px 在宽屏留下大片空白 */
.dropdown-menu .dd-products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(148px, 1fr));
  gap: 14px 16px;
  align-content: start;
}

.dropdown-menu .dd-product-card {
  display: flex;
  width: 100%;
  flex-direction: column;
  overflow: hidden;
  border: none;
  border-radius: 0;
  background: transparent;
  color: var(--gray-700);
  text-decoration: none;
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

.dropdown-menu .dd-product-card:hover,
.dropdown-menu .dd-product-card:focus-visible {
  border: none;
  box-shadow: 0 7px 20px rgba(17, 24, 39, 0.08);
  transform: translateY(-2px);
  outline: none;
}

.dropdown-menu .dd-product-card .card-img {
  display: flex;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--gray-50);
}

.dropdown-menu .dd-product-card .card-img img {
  width: 100%;
  height: 100%;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  transition: transform var(--transition-fast);
}

.dropdown-menu .dd-product-card:hover .card-img img,
.dropdown-menu .dd-product-card:focus-visible .card-img img {
  transform: scale(1.06);
}

/* 类目卡片无缩略图时的首字占位 */
.dropdown-menu .dd-cat-card .card-img-placeholder {
  display: flex;
  width: 100%;
  height: 100%;
  align-items: center;
  justify-content: center;
  color: var(--blue-500);
  font-size: 44px;
  font-weight: 700;
  line-height: 1;
  opacity: 0.55;
  transition: opacity var(--transition-fast);
}

.dropdown-menu .dd-cat-card:hover .card-img-placeholder,
.dropdown-menu .dd-cat-card:focus-visible .card-img-placeholder {
  opacity: 1;
}

.dropdown-menu .dd-product-card .card-name {
  display: flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 8px 8px 0;
}

.dropdown-menu .dd-product-card .card-name span {
  display: -webkit-box;
  overflow: hidden;
  color: var(--gray-700);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.5;
  text-align: center;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.dropdown-menu .dd-product-card:hover .card-name span,
.dropdown-menu .dd-product-card:focus-visible .card-name span {
  color: var(--blue-500);
}

.dropdown-menu .dd-load-more {
  display: block;
  width: 100%;
  margin-top: 16px;
  padding: 11px 16px;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  background: #fff;
  color: var(--gray-600);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

.dropdown-menu .dd-load-more:hover:not(:disabled),
.dropdown-menu .dd-load-more:focus-visible:not(:disabled) {
  border-color: var(--blue-500);
  background: var(--gray-50);
  color: var(--blue-500);
  outline: none;
}

.dropdown-menu .dd-load-more:disabled {
  cursor: default;
  color: var(--gray-400);
}

.dropdown-menu .dd-empty {
  grid-column: 1 / -1;
  padding: 48px 16px;
  text-align: center;
  color: var(--gray-400);
  font-size: 13px;
  line-height: 1.6;
}

@media (max-width: 1200px) {
  .product-dropdown-menu .dropdown-container {
    width: calc(100% - 40px);
  }

  .dropdown-menu .dd-left,
  .dropdown-menu .dd-middle {
    width: 220px;
  }

  .dropdown-menu .dd-products-grid {
    grid-template-columns: repeat(auto-fill, minmax(136px, 1fr));
  }
}

.dropdown-menu a {
  height: auto !important;
}

.dropdown-menu a::after {
  display: none !important;
}

.dropdown-menu .dd-left::-webkit-scrollbar,
.dropdown-menu .dd-middle::-webkit-scrollbar,
.dropdown-menu .dd-right::-webkit-scrollbar {
  width: 4px;
}

.dropdown-menu .dd-left::-webkit-scrollbar-track,
.dropdown-menu .dd-middle::-webkit-scrollbar-track,
.dropdown-menu .dd-right::-webkit-scrollbar-track {
  background: transparent;
}

.dropdown-menu .dd-left::-webkit-scrollbar-thumb,
.dropdown-menu .dd-middle::-webkit-scrollbar-thumb,
.dropdown-menu .dd-right::-webkit-scrollbar-thumb {
  background: var(--gray-300);
  border-radius: 2px;
}

.dropdown-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 50%;
  background: var(--gray-200);
  color: var(--gray-600);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  z-index: 10;
}

.dropdown-close:hover {
  background: var(--gray-300);
  color: var(--gray-900);
}

.dropdown-close svg {
  width: 16px;
  height: 16px;
}

.navbar .nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}

.navbar .nav-actions a {
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  color: var(--gray-600);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.navbar .nav-actions a .nav-action-label {
  font-size: 13px;
  line-height: 1;
  white-space: nowrap;
  text-decoration: none;
}

.navbar .nav-actions a:hover {
  color: var(--blue-500);
}

.navbar .nav-actions a svg {
  width: 20px;
  height: 20px;
}

/* ========== NAV 搜索：通栏下拉搜索条 ========== */
/* 搜索入口由 <a> 改为 <button>，.nav-actions a 的样式不再命中，这里重新给齐。 */
.navbar .nav-actions .search-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  color: var(--gray-600);
  font: inherit;
  transition: color var(--transition-fast);
}

.navbar .nav-actions .search-btn:hover,
.navbar .nav-actions .search-btn[aria-expanded="true"] {
  color: var(--blue-500);
}

.navbar .nav-actions .search-btn svg {
  width: 20px;
  height: 20px;
}

.navbar .nav-actions .search-btn .nav-action-label {
  font-size: 13px;
  line-height: 1;
  white-space: nowrap;
}

.nav-search-panel {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  z-index: 1001;
  background: #fff;
  border-top: 1px solid var(--gray-200);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.1);
  padding: 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
}

.nav-search-panel.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* .navbar .container 的 flex / height:100% 会级联到这里（面板在 header.navbar 内），
   必须显式重置，否则表单与热词行会并排挤在一行、输入框被压窄。 */
.nav-search-panel > .container {
  display: block;
  height: auto;
  padding-top: 20px;
  padding-bottom: 20px;
}

.nav-search__form {
  position: relative;
  display: block;
}

/* 输入框独占一行、撑满 .container 的内容宽度，左右缘与 NAV 内容对齐；
   搜索按钮改为绝对定位落在输入框内侧，不再占据行宽。 */
.nav-search__field {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
  min-width: 0;
}

.nav-search__icon {
  position: absolute;
  left: 14px;
  width: 18px;
  height: 18px;
  color: var(--gray-400, #9ca3af);
  pointer-events: none;
}

.nav-search__input {
  width: 100%;
  height: 48px;
  /* 右侧留出「清空」+「搜索」两个内嵌按钮的宽度 */
  padding: 0 124px 0 42px;
  font-size: 15px;
  color: var(--gray-900);
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
  -webkit-appearance: none;
  appearance: none;
}

.nav-search__input::-webkit-search-cancel-button {
  display: none;
}

.nav-search__input:focus {
  background: #fff;
  border-color: var(--blue-500);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

/* 空关键词提交：输入框抖动一次并保持焦点，不跳转 */
.nav-search__field.is-invalid .nav-search__input {
  border-color: #dc2626;
  animation: nav-search-shake 0.3s ease;
}

@keyframes nav-search-shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

.nav-search__clear {
  position: absolute;
  /* 让开右侧内嵌的「搜索」按钮 */
  right: 96px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  padding: 0;
  background: none;
  border: none;
  border-radius: 50%;
  color: var(--gray-400, #9ca3af);
  cursor: pointer;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-search__clear:hover {
  background: var(--gray-200);
  color: var(--gray-900);
}

.nav-search__clear svg {
  width: 14px;
  height: 14px;
}

.nav-search__submit {
  position: absolute;
  right: 4px;
  height: 40px;
  padding: 0 22px;
  font-size: 15px;
  font-weight: 500;
  color: #fff;
  background: var(--blue-500);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.nav-search__submit:hover {
  background: var(--blue-600, #1d4ed8);
}

/* 输入框下方一行：左侧热门词，右侧关闭入口 */
.nav-search__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 12px;
}

.nav-search__close {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 5px;
  margin-left: auto;
  padding: 4px 10px;
  font-size: 13px;
  background: none;
  border: none;
  border-radius: 6px;
  color: var(--gray-500, #6b7280);
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.nav-search__close:hover {
  background: var(--gray-200);
  color: var(--gray-900);
}

.nav-search__close svg {
  width: 14px;
  height: 14px;
}

/* ===== 实时联想下拉 ===== */
/* 定位在 .nav-search__field 内，左右缘自动跟随输入框，无需手算按钮宽度 */
.nav-search__suggest {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  z-index: 2;
  max-height: 380px;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.12);
}

.nav-search__suggest-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  color: var(--gray-900);
  text-decoration: none;
  border-bottom: 1px solid var(--gray-100);
}

.nav-search__suggest-item:last-child {
  border-bottom: none;
}

.nav-search__suggest-item:hover,
.nav-search__suggest-item.is-active {
  background: var(--gray-100);
}

.nav-search__suggest-thumb {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  overflow: hidden;
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  border-radius: 6px;
  font-size: 15px;
  font-weight: 600;
  color: var(--gray-600);
}

.nav-search__suggest-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.nav-search__suggest-body {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-search__suggest-name {
  font-size: 14px;
  line-height: 1.35;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-search__suggest-name mark {
  background: none;
  color: var(--blue-500);
  font-weight: 600;
}

.nav-search__suggest-sku {
  font-size: 12px;
  color: var(--gray-500, #6b7280);
}

/* 分组标题：类目段 / 产品段 */
.nav-search__suggest-group {
  padding: 8px 14px 4px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--gray-500, #6b7280);
  background: var(--gray-50, #f9fafb);
  border-bottom: 1px solid var(--gray-100);
}

/* 类目项：左侧竖条 + 蓝色标题，与产品项区分 */
.nav-search__suggest-item.is-category {
  box-shadow: inset 3px 0 0 var(--blue-500);
}

.nav-search__suggest-item.is-category .nav-search__suggest-name {
  font-weight: 600;
  color: var(--blue-500);
}

.nav-search__suggest-state {
  padding: 14px;
  font-size: 13px;
  color: var(--gray-500, #6b7280);
  text-align: center;
}

/* ===== 热门搜索词 ===== */
.nav-search__hot {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.nav-search__hot-label {
  font-size: 13px;
  color: var(--gray-500, #6b7280);
}

.nav-search__hot-item {
  padding: 4px 12px;
  font-size: 13px;
  color: var(--gray-600);
  text-decoration: none;
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  border-radius: 999px;
  transition: color var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast);
}

.nav-search__hot-item:hover {
  color: var(--blue-500);
  background: #fff;
  border-color: var(--blue-500);
}

@media (max-width: 1024px) {
  .navbar .nav-actions .search-btn {
    width: auto;
    height: 44px;
    padding: 0 8px;
  }

  .navbar .nav-actions .search-btn .nav-action-label {
    display: none;
  }

  /* 面板与移动端主菜单同层，展开搜索时压住菜单 */
  .nav-search-panel {
    z-index: 1003;
  }

  .nav-search__close {
    display: none;
  }

  .nav-search__submit {
    padding: 0 18px;
  }

  .nav-search__suggest {
    right: 0;
  }
}

@media (max-width: 640px) {
  .nav-search__form {
    gap: 8px;
  }

  .nav-search__input,
  .nav-search__submit {
    height: 42px;
  }

  .nav-search__submit {
    padding: 0 14px;
    font-size: 14px;
  }
}

/* ========== 服务中心下拉 ========== */
.nav-dropdown-support {
  position: relative;
}

.nav-dropdown-support .dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  right: auto;
  margin-left: -390px;
  width: 780px;
  height: auto;
  overflow: visible;
}

@media (max-width: 1200px) and (min-width: 1025px) {
  .nav-dropdown-support .dropdown-menu {
    width: 700px;
    margin-left: -350px;
  }

  .support-group {
    padding: 0 36px;
  }
}

.nav-dropdown-support .dropdown-container {
  padding: 0;
}

.support-dropdown-content {
  display: flex;
  justify-content: center;
  align-items: stretch;
  gap: 0;
  padding: 32px 0;
  width: auto;
  min-width: 0;
}

.support-group {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
  padding: 0 48px;
}

.support-divider {
  width: 1px;
  background: var(--gray-200);
  align-self: stretch;
  margin: 8px 0;
}

.support-group-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--gray-400);
  letter-spacing: 2px;
  text-transform: uppercase;
  /* 左内边距与 .support-dropdown-item 一致，使标题与图标左边缘同列 */
  padding: 0 0 12px 16px;
}

.support-dropdown-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 16px;
  border-radius: 8px;
  color: var(--gray-700);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.5px;
  text-decoration: none;
  transition: color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
}

.support-dropdown-item:hover {
  background: rgba(43, 108, 176, 0.06);
  color: var(--blue-500);
  transform: translateX(4px);
}

.support-item-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: #fff;
  color: var(--blue-500);
  flex-shrink: 0;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.support-item-icon svg {
  width: 18px;
  height: 18px;
}

.support-dropdown-item:hover .support-item-icon {
  background: var(--blue-500);
  color: #fff;
}

.support-item-text {
  flex: 1;
}

/* ========== 汉堡菜单 / 移动端顶部面板 ========== */
.nav-toggle {
  display: none;
}

.navbar .nav-dropdown > .dropdown-toggle {
  display: none;
}

.dd-left-footer {
  display: none;
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--blue-500);
  outline-offset: 2px;
}

.nav-overlay {
  position: fixed;
  top: var(--navbar-height);
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1001;
  background: rgba(17, 24, 39, 0.25);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

body.nav-open .nav-overlay {
  opacity: 1;
  visibility: visible;
}

.nav-dropdown.is-open .dropdown-trigger::before {
  transform: rotate(-135deg);
  margin-top: 2px;
}

@media (max-width: 1024px) {
  :root {
    --nav-mobile-mallbar-height: 40px;
  }

  body.has-nav-mobile-mallbar {
    padding-top: var(--nav-mobile-mallbar-height);
  }

  .nav-mobile-mallbar {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1003;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: var(--nav-mobile-mallbar-height);
    padding: 0 16px;
    background: var(--blue-500);
    color: #fff;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: .04em;
    text-decoration: none;
  }

  .nav-mobile-mallbar span {
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
  }

  .has-nav-mobile-mallbar .navbar {
    top: var(--nav-mobile-mallbar-height);
  }

  .has-nav-mobile-mallbar .nav-overlay,
  .has-nav-mobile-mallbar .navbar .nav-menu {
    top: calc(var(--navbar-height) + var(--nav-mobile-mallbar-height));
  }

  .has-nav-mobile-mallbar .navbar .nav-menu {
    max-height: calc(100dvh - var(--navbar-height) - var(--nav-mobile-mallbar-height));
  }

  .has-nav-mobile-mallbar .nav-dropdown.is-open > .dropdown-menu {
    max-height: calc(100dvh - var(--navbar-height) - var(--nav-mobile-mallbar-height) - 52px);
  }

  body.nav-open {
    overflow: hidden;
  }

  /* ===== 汉堡按钮：44px 触控目标，三线变 X ===== */
  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    margin-right: -4px;
    padding: 0;
    border: none;
    background: none;
    color: var(--gray-700);
    cursor: pointer;
  }

  .nav-toggle svg {
    width: 24px;
    height: 24px;
  }

  .nav-toggle-line {
    transform-box: fill-box;
    transform-origin: center;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
  }

  body.nav-open .nav-toggle-line-top {
    transform: translateY(6px) rotate(45deg);
  }

  body.nav-open .nav-toggle-line-middle {
    opacity: 0;
  }

  body.nav-open .nav-toggle-line-bottom {
    transform: translateY(-6px) rotate(-45deg);
  }

  .navbar .nav-actions {
    gap: 2px;
  }

  .navbar .nav-actions a {
    width: auto;
    height: 44px;
    padding: 0 8px;
  }

  .navbar .nav-actions a .nav-action-label {
    display: none;
  }

  /* ===== 主菜单：顶栏下方全宽展开 ===== */
  .navbar .nav-menu {
    position: fixed;
    top: var(--navbar-height);
    left: 0;
    right: 0;
    z-index: 1002;
    display: block;
    width: 100%;
    height: auto;
    margin: 0;
    padding: 0 0 24px;
    overflow-y: auto;
    overscroll-behavior: contain;
    max-height: 100vh;
    max-height: calc(100dvh - var(--navbar-height));
    background: #fff;
    border-top: 1px solid var(--gray-200);
    box-shadow: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
  }

  body.nav-open .navbar .nav-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .navbar.scrolled {
    box-shadow: none;
  }

  .navbar .nav-menu > a,
  .navbar .nav-menu .dropdown-trigger {
    width: 100%;
    height: 52px;
    padding: 0 20px;
    justify-content: flex-start;
    border-bottom: 1px solid var(--gray-200);
    font-size: 15px;
  }

  .navbar .nav-menu > a::after,
  .navbar .nav-menu .dropdown-trigger::after {
    display: none;
  }

  /* ===== 子菜单行：链接 + 独立展开按钮 ===== */
  .navbar .nav-dropdown {
    display: flex;
    flex-wrap: wrap;
    align-items: stretch;
    height: auto;
  }

  .navbar .nav-dropdown .dropdown-trigger {
    flex: 1 1 auto;
    width: auto;
    min-width: 0;
    /* 桌面端使用反向排列放置箭头；手机端箭头独立为右侧按钮，文字应从左开始。 */
    flex-direction: row;
  }

  .navbar .nav-dropdown .dropdown-trigger::before {
    display: none;
  }

  .navbar .nav-dropdown > .dropdown-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    flex: none;
    border: none;
    border-bottom: 1px solid var(--gray-200);
    border-left: 1px solid var(--gray-200);
    background: none;
    color: var(--gray-500);
    cursor: pointer;
  }

  .navbar .nav-dropdown > .dropdown-toggle svg {
    width: 18px;
    height: 18px;
    transition: transform var(--transition-fast);
  }

  .nav-dropdown.is-open > .dropdown-toggle svg {
    transform: rotate(180deg);
  }

  /* ===== 子菜单：手风琴展开，折叠时占位为 0 ===== */
  .dropdown-menu,
  .nav-dropdown-support .dropdown-menu {
    position: relative;
    top: auto;
    left: auto;
    right: auto;
    margin-left: 0;
    width: 100%;
    max-height: 0;
    border: none;
    border-top: 1px solid var(--gray-200);
    border-radius: 0;
    box-shadow: none;
    transform: none;
    opacity: 0;
    visibility: hidden;
    overflow: hidden;
    transition: max-height 0.25s ease, opacity 0.2s ease, visibility 0.25s ease;
  }

  .nav-dropdown.is-open > .dropdown-menu {
    max-height: calc(100dvh - var(--navbar-height) - 52px);
    opacity: 1;
    visibility: visible;
    overflow-y: auto;
  }

  .dropdown-menu::before {
    display: none;
  }

  .dropdown-close {
    display: none;
  }

  /* ===== 产品子菜单：手机端逐屏 一级 → 二级图片卡片 ===== */
  .product-dropdown-menu .dropdown-container {
    display: block;
    width: 100%;
    height: auto;
    margin: 0;
    padding: 12px 16px 20px;
  }

  .dropdown-menu .dd-left {
    width: 100%;
    padding: 8px 0;
    border-right: none;
    border-bottom: none;
    background: transparent;
  }

  .dropdown-menu .dd-middle,
  .dropdown-menu .dd-right {
    display: none;
  }

  .product-dropdown-menu.pm-cards-view .dd-left {
    display: none;
  }

  .product-dropdown-menu.pm-cards-view .dd-middle {
    display: block;
    width: 100%;
    padding: 8px 0;
    border-right: none;
  }


  .dropdown-menu .dd-middle-kicker,
  .dropdown-menu .dd-right-kicker,
  .dropdown-menu .dd-view-all {
    display: none;
  }

  .dropdown-menu .dd-middle-header,
  .dropdown-menu .dd-right-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0 0 8px;
    padding: 10px 4px;
    border-bottom: 1px solid var(--gray-100);
  }

  .dropdown-menu .dd-right-heading {
    display: flex;
    min-width: 0;
    flex: 1;
    align-items: center;
  }
  .dropdown-menu .dd-mobile-back-cards {
    display: inline-flex;
  }

  .dropdown-menu .dd-middle-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0 0 8px;
    padding: 10px 4px;
    border-bottom: 1px solid var(--gray-100);
  }

  .dropdown-menu .dd-middle-title {
    font-size: 15px;
  }
  .dropdown-menu .dd-mobile-back,
  .dropdown-menu .dd-mobile-back-cards {
    display: inline-flex;
    flex: none;
    align-items: center;
    gap: 4px;
    padding: 6px 10px 6px 4px;
    border: none;
    background: none;
    color: var(--blue-500);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
  }

  .dropdown-menu .dd-mobile-back svg,
  .dropdown-menu .dd-mobile-back-cards svg {
    width: 18px;
    height: 18px;
  }


  .dropdown-menu .dd-products-grid {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  }

  .dropdown-menu .dd-product-card,
  .dropdown-menu .dd-product-card .card-img {
    width: 100%;
  }

  .dropdown-menu .dd-product-card .card-img {
    height: auto;
    aspect-ratio: 1 / 1;
  }

  /* 移动端导航抽屉内的产品选项与其他菜单项保持同一左侧基线。 */
  .dropdown-menu .dd-product-card .card-name {
    justify-content: flex-start;
  }

  .dropdown-menu .dd-product-card .card-name span {
    text-align: left;
  }

  .dropdown-menu .dd-column-header {
    font-size: 12px;
    color: var(--gray-500);
  }

  .dropdown-menu .dd-cat {
    min-height: 48px;
  }

  .dropdown-menu .dd-cat.active {
    box-shadow: none;
  }

  .dd-left-footer {
    display: block;
    margin-top: 6px;
    padding: 14px 12px 4px;
    border-top: 1px solid var(--gray-100);
  }

  .dd-left-footer .dd-view-all-mobile {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--blue-500);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
  }

  /* ===== 支持子菜单：纵向列表 ===== */
  .support-dropdown-content {
    flex-direction: column;
    align-items: stretch;
    padding: 8px 0 16px;
  }

  .support-group {
    padding: 10px 16px 4px;
  }

  .support-divider {
    display: none;
  }

  .support-dropdown-item {
    min-height: 48px;
  }

  .support-item-icon {
    box-shadow: none;
  }

  /* ===== 减少动效偏好 ===== */
  @media (prefers-reduced-motion: reduce) {
    .navbar .nav-menu,
    .dropdown-menu,
    .nav-toggle-line,
    .nav-dropdown > .dropdown-toggle svg {
      transition: none !important;
    }
  }
}
@media (max-width: 767px) {
  .navbar .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .navbar .logo {
    font-size: 19px;
  }

  .navbar .nav-actions {
    min-width: 0;
  }

  .navbar .nav-actions a {
    padding-left: 5px;
    padding-right: 5px;
  }

  .navbar .nav-actions .nav-action-icon {
    width: 20px;
    height: 20px;
  }

  .nav-toggle {
    width: 40px;
    height: 40px;
    margin-right: -2px;
  }

  .navbar .nav-menu > a,
  .navbar .nav-menu .dropdown-trigger {
    padding-left: 16px;
    padding-right: 16px;
  }
}