/* 产品展示页面专用样式，美观、响应式、可维护 */

/* 主容器添加上边距 */
main {
    padding-top: 80px; /* 根据header高度调整 */
    background-color: #f5f5f5;
    min-height: calc(100vh - 80px); /* 确保最小高度填满屏幕 */
}

.products-nav {
  position: sticky;
  top: 65px;
  z-index: 10;
  background: #fff;
  border-bottom: 1px solid #ececec;
  padding: 0.5em 0 0.5em 0;
  margin-bottom: 2em;
  box-shadow: 0 2px 8px rgba(0,0,0,0.03);
  display: flex;
  gap: 1.2em;
  overflow-x: auto;
  scrollbar-width: none;
}
.products-nav::-webkit-scrollbar { display: none; }
.products-nav-link {
  color: #1976d2;
  font-weight: 600;
  font-size: 1.1em;
  padding: 0.3em 1.2em;
  border-radius: 20px;
  background: none;
  transition: background 0.18s, color 0.18s;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}
.products-nav-link.active,
.products-nav-link:hover {
  background: #e3f2fd;
  color: #145ea8;
}

.products-section {
  margin-bottom: 3.5em;
  padding-bottom: 2em;
  border-bottom: 1px solid #f0f0f0;
}
.product-category-title {
  font-size: 2em;
  font-weight: 700;
  margin: 1.2em 0 0.4em 0;
  color: #1976d2;
  letter-spacing: 1px;
}
.product-category-desc {
  font-size: 1.11em;
  color: #555;
  margin-bottom: 1.2em;
  line-height: 1.7;
}
.products-grid {
  display: grid;
  gap: 2.2em 2.2em;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  margin-bottom: 0.5em;
}
.product-card {
  background: #fff;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 380px;
}
.product-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}
.product-card-image {
  width: 100%;
  height: 220px;
  position: relative;
  overflow: hidden;
  background: #f5f5f5;
}
.product-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}
.product-card:hover .product-card-image img {
  transform: scale(1.05);
}
.product-card-content {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.product-card h3 {
  font-size: 18px;
  margin: 0 0 10px 0;
  color: #333;
  font-weight: 600;
}
.product-card p {
  color: #666;
  font-size: 14px;
  line-height: 1.6;
  margin: 0;
  flex: 1;
}
.product-card .btn {
  background: var(--button-bg, #ff9800);
  color: #fff;
  border: none;
  border-radius: 16px;
  padding: 0.5em 1.4em;
  font-size: 1em;
  font-weight: 500;
  margin-top: auto;
  cursor: pointer;
  transition: background 0.18s;
  text-decoration: none;
  display: inline-block;
}
.product-card .btn:hover {
  background: var(--button-hover, #ffa726);
}

/* 产品详情弹窗 */
.product-modal {
  display: none;
  position: fixed;
  z-index: 9999;
  left: 0; top: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.27);
  justify-content: center;
  align-items: center;
  animation: fadeIn 0.2s;
}
.product-modal.active {
  display: flex;
}
.product-modal-content {
  background: #fff;
  border-radius: 18px;
  box-shadow: 0 8px 40px 0 rgba(40,60,120,0.15);
  padding: 2.5em 2em 2em 2em;
  max-width: 420px;
  width: 94vw;
  position: relative;
  text-align: center;
  animation: popIn 0.23s;
}
.product-modal-content img {
  max-width: 90%;
  max-height: 220px;
  margin-bottom: 1em;
  border-radius: 12px;
  object-fit: contain;
}
.product-modal-content h3 {
  font-size: 1.25em;
  font-weight: 700;
  margin: 0.5em 0 0.3em 0;
  color: #1976d2;
}
.product-modal-content p {
  font-size: 1.07em;
  color: #444;
  margin: 0.7em 0 1.2em 0;
}
.product-modal-close {
  position: absolute;
  top: 1em;
  right: 1.1em;
  font-size: 1.7em;
  color: #aaa;
  cursor: pointer;
  background: none;
  border: none;
  transition: color 0.18s;
}
.product-modal-close:hover {
  color: #1976d2;
}
@keyframes fadeIn {
  from { opacity: 0; } to { opacity: 1; }
}
@keyframes popIn {
  from { transform: scale(0.92); opacity: 0.7; } to { transform: scale(1); opacity: 1; }
}

@media (max-width: 700px) {
  .products-grid {
    grid-template-columns: 1fr;
    gap: 1.3em;
  }
  .product-modal-content { padding: 1.1em 0.5em 1em 0.5em; }
}

/* 产品展示页面样式 */
.products-center-container {
    display: flex;
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    gap: 30px;
    position: relative; /* 添加相对定位 */
}

/* 侧边栏样式 */
.products-sidebar {
    width: 280px;
    flex-shrink: 0;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    padding: 20px;
    position: sticky; /* 使侧边栏固定 */
    top: 100px; /* 距离顶部的距离，需要大于header高度 */
    height: fit-content; /* 高度适应内容 */
    max-height: calc(100vh - 120px); /* 最大高度，留出空间 */
    overflow-y: auto; /* 内容过多时可滚动 */
}

.products-sidebar-title {
    font-size: 18px;
    font-weight: bold;
    padding: 15px;
    background-color: #f5f5f5;
    border-radius: 4px;
    margin-bottom: 10px;
    color: #333;
}

.products-sidebar-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.products-sidebar-list li {
    margin-bottom: 8px;
}

.products-sidebar-list a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    color: #333;
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.products-sidebar-list a:hover {
    background-color: #f0f0f0;
}

.products-sidebar-list a.active {
    background-color: #e6f7ff;
    color: #1890ff;
    font-weight: 500;
}

/* 子分类列表样式 */
.sub-category-list {
    list-style: none;
    padding-left: 20px;
    margin: 5px 0;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease-in-out;
    opacity: 0;
}

.sub-category-list.expanded {
    max-height: 500px; /* 足够大的高度以容纳内容 */
    opacity: 1;
    margin: 10px 0;
}

.sub-category-list li {
    margin: 5px 0;
}

.sub-category-list a {
    font-size: 14px;
    padding: 8px 15px;
    color: #666;
}

.sub-category-list a:hover {
    color: #1976d2;
}

/* 展开/折叠图标 */
.expand-icon {
    font-size: 12px;
    transition: transform 0.3s ease;
    color: #999;
    margin-left: 8px;
    display: inline-block;
}

.expand-icon.expanded {
    transform: rotate(180deg);
}

/* 主内容区域样式 */
.products-main {
    flex: 1;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    padding: 30px;
    min-height: 500px; /* 确保有最小高度 */
}

/* 面包屑导航样式 */
.breadcrumb {
    margin-bottom: 24px;
    padding: 12px 0;
    font-size: 14px;
    color: #666;
    border-bottom: 1px solid #eee;
}

.breadcrumb a {
    color: #666;
    text-decoration: none;
    transition: color 0.3s ease;
}

.breadcrumb a:hover {
    color: #1890ff;
}

/* 子分类容器样式 */
.sub-categories-container {
    margin-bottom: 30px;
}

.sub-categories-container h2 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #333;
}

.sub-categories-container p {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.6;
}

/* 子分类网格样式 */
.sub-categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 24px;
    margin-top: 24px;
}

.sub-category-card {
    background: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.sub-category-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.sub-category-card h3 {
    margin: 0 0 12px 0;
    color: #333;
}

.sub-category-card p {
    margin: 0 0 16px 0;
    color: #666;
    font-size: 0.9em;
    line-height: 1.5;
}

.sub-category-card button {
    background: #1890ff;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.sub-category-card button:hover {
    background: #40a9ff;
}

/* 响应式布局调整 */
@media (max-width: 768px) {
    main {
        padding-top: 60px; /* 移动端可以稍微减小上边距 */
    }

    .products-center-container {
        flex-direction: column;
        padding: 15px;
    }
    
    .products-sidebar {
        width: 100%;
        margin-bottom: 20px;
        position: relative; /* 移动端取消固定定位 */
        top: 0;
        max-height: none;
    }
    
    .products-main {
        padding: 20px;
    }
    
    .sub-categories-grid,
    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 16px;
    }
}