<template>
  <div class="shop-page">
    <!-- 导航栏 -->
    <nav class="navbar">
      <div class="nav-center">
        <h1 class="nav-title">积分商城</h1>
      </div>
      <div class="nav-right">
        <el-button 
          type="text" 
          @click="$router.push('/points')"
          class="points-btn"
        >
          <el-icon><Coin /></el-icon>
          {{ userPoints }}
        </el-button>
      </div>
    </nav>

    <!-- 搜索栏 -->
    <div class="search-section">
      <el-input
        v-model="searchKeyword"
        placeholder="搜索商品"
        class="search-input"
        @input="handleSearch"
      >
        <template #prefix>
          <el-icon><Search /></el-icon>
        </template>
      </el-input>
    </div>

    <!-- 分类筛选 -->
    <div class="category-section">
      <el-scrollbar>
        <div class="category-list">
          <div 
            v-for="category in categories" 
            :key="category.id"
            :class="['category-item', { active: selectedCategory === category.id }]"
            @click="selectCategory(category.id)"
          >
            <el-icon>{{ category.icon }}</el-icon>
            <span>{{ category.name }}</span>
          </div>
        </div>
      </el-scrollbar>
    </div>

    <!-- 商品列表 -->
    <div class="products-section">
      <div class="section-header">
        <h3>热门商品</h3>
        <el-dropdown @command="handleSort">
          <span class="sort-btn">
            {{ sortText }}
            <el-icon><ArrowDown /></el-icon>
          </span>
          <template #dropdown>
            <el-dropdown-menu>
              <el-dropdown-item command="default">默认排序</el-dropdown-item>
              <el-dropdown-item command="price_asc">价格从低到高</el-dropdown-item>
              <el-dropdown-item command="price_desc">价格从高到低</el-dropdown-item>
              <el-dropdown-item command="sales">销量优先</el-dropdown-item>
            </el-dropdown-menu>
          </template>
        </el-dropdown>
      </div>

      <div v-loading="loading" class="products-grid">
        <div 
          v-for="product in filteredProducts" 
          :key="product.id"
          class="product-card"
          @click="goToProduct(product.id)"
        >
          <div class="product-image">
            <img :src="getImageUrl(product.image)" :alt="product.name" />
            <div v-if="product.discount" class="discount-badge">
              {{ product.discount }}折
            </div>
          </div>
          <div class="product-info">
            <h4 class="product-name">{{ product.name }}</h4>
            <p class="product-desc">{{ truncateText(product.description, 50) }}</p>
            <div class="product-price">
              <span class="current-price">
                <el-icon><Coin /></el-icon>
                {{ product.points }}
              </span>
              <span v-if="product.originalPoints" class="original-price">
                {{ product.originalPoints }}
              </span>
            </div>
            <div class="product-stats">
              <span class="sales">已售 {{ product.sales }}</span>
              <span class="stock">库存 {{ product.stock }}</span>
            </div>
          </div>
          <div class="product-actions">
            <el-button 
              type="primary" 
              size="small"
              @click.stop="addToCart(product)"
              :disabled="product.stock === 0"
            >
              {{ product.stock === 0 ? '缺货' : '兑换' }}
            </el-button>
          </div>
        </div>
      </div>

      <!-- 空状态 -->
      <div v-if="!loading && filteredProducts.length === 0" class="empty-state">
        <el-icon size="60"><Box /></el-icon>
        <p>暂无商品</p>
      </div>

      <!-- 加载更多 -->
      <div v-if="hasMore" class="load-more">
        <el-button @click="loadMore" :loading="loadingMore">
          加载更多
        </el-button>
      </div>
    </div>

    <!-- 购物车悬浮按钮 -->
    <div class="cart-fab" @click="showCart = true">
      <el-badge :value="cartCount" :hidden="cartCount === 0">
        <el-icon size="24"><ShoppingCart /></el-icon>
      </el-badge>
    </div>

    <!-- 购物车抽屉 -->
    <el-drawer
      v-model="showCart"
      title="购物车"
      direction="rtl"
      size="80%"
      :z-index="10000"
      :modal="true"
      :append-to-body="true"
    >
      <div class="cart-content">
        <div v-if="cartItems.length === 0" class="empty-cart">
          <el-icon size="60"><ShoppingCart /></el-icon>
          <p>购物车是空的</p>
        </div>
        <div v-else>
          <div v-for="item in cartItems" :key="item.id" class="cart-item">
            <img :src="getImageUrl(item.image)" :alt="item.name" class="item-image" />
            <div class="item-info">
              <h4>{{ item.name }}</h4>
              <p class="item-price">
                <el-icon><Coin /></el-icon>
                {{ item.points }}
              </p>
            </div>
            <div class="item-actions">
              <el-input-number
                v-model="item.quantity"
                :min="1"
                :max="item.stock"
                size="small"
                @change="updateCartItem(item)"
              />
              <el-button 
                type="danger" 
                size="small" 
                @click="removeFromCart(item.id)"
              >
                删除
              </el-button>
            </div>
          </div>
          <div class="cart-footer">
            <div class="total-points">
              总计：<el-icon><Coin /></el-icon>{{ totalPoints }}
            </div>
            <el-button 
              type="primary" 
              size="large"
              @click="checkout"
              :disabled="totalPoints > userPoints"
            >
              {{ totalPoints > userPoints ? '积分不足' : '立即兑换' }}
            </el-button>
          </div>
        </div>
      </div>
    </el-drawer>
  </div>
</template>

<script setup>
import { ref, reactive, computed, onMounted } from 'vue'
import { useRouter } from 'vue-router'
import { useUserStore } from '@/stores/user'
import { ElMessage, ElMessageBox } from 'element-plus'
import { 
  ArrowLeft,
  Coin,
  Search,
  ArrowDown,
  Box,
  ShoppingCart
} from '@element-plus/icons-vue'
import api from '@/utils/api'
import { debounce } from 'lodash-es'
import { getImageUrl } from '@/config'

const router = useRouter()
const userStore = useUserStore()

// 响应式数据
const loading = ref(false)
const loadingMore = ref(false)
const searchKeyword = ref('')
const selectedCategory = ref('all')
const sortBy = ref('default')
const products = ref([])
const page = ref(1)
const hasMore = ref(true)
const showCart = ref(false)
const cartItems = ref([])

// 用户积分
const userPoints = ref(0)

// 分类数据
const categories = ref([
  { id: 'all', name: '全部', icon: '🛍️' },
  { id: 'electronics', name: '数码', icon: '📱' },
  { id: 'books', name: '图书', icon: '📚' },
  { id: 'lifestyle', name: '生活', icon: '🏠' },
  { id: 'food', name: '美食', icon: '🍔' },
  { id: 'sports', name: '运动', icon: '⚽' },
  { id: 'beauty', name: '美妆', icon: '💄' }
])

// 计算属性
const filteredProducts = computed(() => {
  // 安全检查：确保products.value是数组
  if (!products.value || !Array.isArray(products.value)) {
    return []
  }
  
  let result = products.value
  
  // 分类筛选
  if (selectedCategory.value !== 'all') {
    result = result.filter(p => p.category === selectedCategory.value)
  }
  
  // 搜索筛选
  if (searchKeyword.value) {
    result = result.filter(p => 
      p.name && p.name.toLowerCase().includes(searchKeyword.value.toLowerCase()) ||
      p.description && p.description.toLowerCase().includes(searchKeyword.value.toLowerCase())
    )
  }
  
  // 排序
  switch (sortBy.value) {
    case 'price_asc':
      result.sort((a, b) => (a.points || 0) - (b.points || 0))
      break
    case 'price_desc':
      result.sort((a, b) => (b.points || 0) - (a.points || 0))
      break
    case 'sales':
      result.sort((a, b) => (b.sales || 0) - (a.sales || 0))
      break
  }
  
  return result
})

const sortText = computed(() => {
  const sortMap = {
    default: '默认排序',
    price_asc: '价格从低到高',
    price_desc: '价格从高到低',
    sales: '销量优先'
  }
  return sortMap[sortBy.value]
})

const cartCount = computed(() => {
  // 安全检查：确保cartItems.value是数组
  if (!cartItems.value || !Array.isArray(cartItems.value)) {
    return 0
  }
  return cartItems.value.reduce((sum, item) => sum + (item.quantity || 0), 0)
})

const totalPoints = computed(() => {
  // 安全检查：确保cartItems.value是数组
  if (!cartItems.value || !Array.isArray(cartItems.value)) {
    return 0
  }
  return cartItems.value.reduce((sum, item) => sum + ((item.points || 0) * (item.quantity || 0)), 0)
})

// 方法
const selectCategory = (categoryId) => {
  selectedCategory.value = categoryId
}

const handleSort = (command) => {
  sortBy.value = command
}

const handleSearch = debounce(() => {
  // 搜索逻辑已在计算属性中处理
}, 300)

const goToProduct = (productId) => {
  router.push(`/product/${productId}`)
}

const addToCart = (product) => {
  const existingItem = cartItems.value.find(item => item.id === product.id)
  
  if (existingItem) {
    if (existingItem.quantity < product.stock) {
      existingItem.quantity++
      ElMessage.success('已添加到购物车')
    } else {
      ElMessage.warning('库存不足')
    }
  } else {
    cartItems.value.push({
      ...product,
      quantity: 1
    })
    ElMessage.success('已添加到购物车')
  }
}

const updateCartItem = (item) => {
  // 数量更新逻辑
}

const removeFromCart = (productId) => {
  const index = cartItems.value.findIndex(item => item.id === productId)
  if (index > -1) {
    cartItems.value.splice(index, 1)
    ElMessage.success('已从购物车移除')
  }
}

const checkout = async () => {
  try {
    await ElMessageBox.confirm(
      `确定要花费 ${totalPoints.value} 积分兑换这些商品吗？`,
      '确认兑换',
      {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }
    )
    
    const orderData = {
      items: cartItems.value.map(item => ({
        productId: item.id,
        quantity: item.quantity,
        points: item.points
      })),
      totalPoints: totalPoints.value
    }
    
    await api.post('/orders', orderData)
    
    // 清空购物车
    cartItems.value = []
    showCart.value = false
    
    // 更新用户积分
    userPoints.value -= totalPoints.value
    
    ElMessage.success('兑换成功！')
    router.push('/orders')
  } catch (error) {
    if (error !== 'cancel') {
      ElMessage.error('兑换失败，请重试')
    }
  }
}

const getProducts = async (isLoadMore = false) => {
  try {
    if (!isLoadMore) {
      loading.value = true
      page.value = 1
    } else {
      loadingMore.value = true
    }
    
    const {data} = await api.get('/products', {
      params: {
        page: page.value,
        limit: 20,
        category: selectedCategory.value === 'all' ? '' : selectedCategory.value,
        keyword: searchKeyword.value,
        sort: sortBy.value
      }
    })
    
    // 确保响应数据是有效的数组
    const responseProducts = data.data?.products || []
    
    if (isLoadMore) {
      // 确保products.value是数组
      if (!Array.isArray(products.value)) {
        products.value = []
      }
      products.value.push(...responseProducts)
    } else {
      products.value = responseProducts
    }
    
    hasMore.value = data.data?.hasMore || false
    page.value++
  } catch (error) {
    console.error('获取商品列表失败:', error)
    ElMessage.error('获取商品列表失败')
    // 确保products.value始终是数组
    if (!isLoadMore && (!products.value || !Array.isArray(products.value))) {
      products.value = []
    }
  } finally {
    loading.value = false
    loadingMore.value = false
  }
}

const loadMore = () => {
  getProducts(true)
}

const getUserPoints = async () => {
  try {
    const response = await api.get('/user/points')
    userPoints.value = response.data.points || 0
  } catch (error) {
    console.error('获取用户积分失败:', error)
    userPoints.value = 0
  }
}

const truncateText = (text, maxLength) => {
  // 安全检查：确保text是字符串
  if (!text || typeof text !== 'string') {
    return ''
  }
  if (text.length <= maxLength) return text
  return text.substring(0, maxLength) + '...'
}

// 生命周期
onMounted(() => {
  getProducts()
  getUserPoints()
})
</script>

<style scoped>
.shop-page {
  min-height: 100vh;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  background-attachment: fixed;
  padding-bottom: 80px;
  position: relative;
  /* 移动端优化 */
  -webkit-overflow-scrolling: touch;
  overflow-x: hidden;
}

.shop-page::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, rgba(120, 119, 198, 0.2) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

.shop-page > * {
  position: relative;
  z-index: 1;
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  height: 56px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.nav-left,
.nav-right {
  flex: 1;
}

.nav-right {
  display: flex;
  justify-content: flex-end;
}

.back-btn,
.points-btn {
  color: #409eff;
  font-size: 14px;
}

.nav-title {
  margin: 0;
  font-size: 18px;
  font-weight: 800;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.search-section {
  padding: 20px;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  margin: 20px 16px 0 16px;
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.search-input {
  width: 100%;
}

.category-section {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  padding: 20px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  margin: 0 16px;
  border-radius: 16px;
  margin-top: 16px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.category-list {
  display: flex;
  gap: 16px;
  padding: 0 16px;
  white-space: nowrap;
}

.category-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  border-radius: 16px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  min-width: 70px;
  background: rgba(248, 250, 252, 0.8);
  border: 2px solid transparent;
  /* 移动端触摸优化 */
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  user-select: none;
}

.category-item:hover {
  background: rgba(139, 92, 246, 0.1);
  border-color: rgba(139, 92, 246, 0.3);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.2);
}

.category-item.active {
  background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
  color: white;
  border-color: rgba(255, 255, 255, 0.3);
  box-shadow: 0 6px 20px rgba(139, 92, 246, 0.4);
  transform: translateY(-3px);
}

.category-item span {
  font-size: 12px;
}

.products-section {
  padding: 20px;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  margin: 20px;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.section-header h3 {
  margin: 0;
  font-size: 16px;
  color: #333;
}

.sort-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  color: #666;
  font-size: 14px;
  cursor: pointer;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 20px;
}

.product-card {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(248, 250, 252, 0.9) 100%);
  backdrop-filter: blur(20px);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(139, 92, 246, 0.15);
  border: 1px solid rgba(139, 92, 246, 0.2);
  cursor: pointer;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  /* 移动端触摸优化 */
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.08) 0%, rgba(124, 58, 237, 0.06) 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.product-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 16px 48px rgba(139, 92, 246, 0.25);
  border-color: rgba(139, 92, 246, 0.4);
}

.product-card:hover::before {
  opacity: 1;
}

.product-card:active {
  transform: translateY(-4px) scale(1.01);
  transition: all 0.1s;
}

.product-image {
  position: relative;
  width: 100%;
  height: 140px;
  overflow: hidden;
  background: linear-gradient(45deg, #f1f5f9 0%, #e2e8f0 100%);
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.product-card:hover .product-image img {
  transform: scale(1.1);
}

.discount-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background: linear-gradient(135deg, #ff6b6b 0%, #ff5252 100%);
  color: white;
  padding: 4px 8px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(255, 107, 107, 0.3);
  backdrop-filter: blur(10px);
}

.product-info {
  padding: 16px;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(15px);
}

.product-name {
  margin: 0 0 6px 0;
  font-size: 15px;
  font-weight: 600;
  color: #1e293b;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}

.product-desc {
  margin: 0 0 12px 0;
  font-size: 12px;
  color: #64748b;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}

.product-price {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}

.current-price {
  display: flex;
  align-items: center;
  gap: 4px;
  color: #f59e0b;
  font-weight: 700;
  font-size: 17px;
  background: linear-gradient(135deg, #f59e0b 0%, #f97316 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.original-price {
  color: #94a3b8;
  font-size: 12px;
  text-decoration: line-through;
  font-weight: 500;
}

.product-stats {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: #64748b;
  margin-bottom: 8px;
  background: rgba(139, 92, 246, 0.08);
  padding: 6px 10px;
  border-radius: 8px;
  backdrop-filter: blur(5px);
  border: 1px solid rgba(139, 92, 246, 0.1);
}

.product-actions {
  padding: 0 16px 16px;
}

.product-actions .el-button {
  width: 100%;
  height: 40px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 14px;
  background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
  border: none;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.product-actions .el-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
  background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
}

.product-actions .el-button:active {
  transform: translateY(0);
}

.product-actions .el-button:disabled {
  background: linear-gradient(135deg, #e2e8f0 0%, #cbd5e1 100%);
  color: #64748b;
  box-shadow: none;
  transform: none;
}

.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: #999;
}

.load-more {
  text-align: center;
  padding: 20px;
}

.cart-fab {
  position: fixed;
  bottom: 80px;
  right: 40px;
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  cursor: pointer;
  box-shadow: 0 8px 25px rgba(139, 92, 246, 0.4);
  z-index: 9999;
  /* 移动端触摸优化 */
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  user-select: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  backdrop-filter: blur(10px);
  border: 2px solid rgba(255, 255, 255, 0.2);
}

.cart-badge {
  position: absolute;
  top: -6px;
  right: -6px;
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  color: white;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.4);
  border: 2px solid white;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.4), 0 0 0 0 rgba(239, 68, 68, 0.7);
  }
  70% {
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.4), 0 0 0 10px rgba(239, 68, 68, 0);
  }
  100% {
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.4), 0 0 0 0 rgba(239, 68, 68, 0);
  }
}

.cart-fab:hover {
  transform: scale(1.1);
  box-shadow: 0 12px 35px rgba(139, 92, 246, 0.5);
  background: linear-gradient(135deg, #7c3aed 0%, #6d28d9 100%);
}

.cart-fab:active {
  transform: scale(1.05);
  box-shadow: 0 6px 20px rgba(139, 92, 246, 0.4);
}

.cart-content {
  height: 100%;
  display: flex;
  flex-direction: column;
}

.empty-cart {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #999;
}

.cart-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 0;
  border-bottom: 1px solid #eee;
}

.item-image {
  width: 60px;
  height: 60px;
  border-radius: 8px;
  object-fit: cover;
}

.item-info {
  flex: 1;
}

.item-info h4 {
  margin: 0 0 4px 0;
  font-size: 14px;
  color: #333;
}

.item-price {
  display: flex;
  align-items: center;
  gap: 2px;
  color: #ff6b35;
  font-weight: 600;
  margin: 0;
}

.item-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: flex-end;
}

.cart-footer {
  margin-top: auto;
  padding: 20px 0;
  border-top: 1px solid #eee;
}

.total-points {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 18px;
  font-weight: 600;
  color: #ff6b35;
  margin-bottom: 16px;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .navbar {
    padding: 0 12px;
    height: 50px;
  }
  
  .nav-title {
    font-size: 16px;
  }
  
  .back-btn,
  .points-btn {
    font-size: 13px;
  }
  
  .search-section {
    padding: 16px;
    margin: 16px 12px 0 12px;
  }
  
  .category-section {
    padding: 12px 0;
    margin: 12px;
  }
  
  .category-list {
    padding: 0 12px;
    gap: 12px;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }
  
  .category-list::-webkit-scrollbar {
    display: none;
  }
  
  .category-item {
    min-width: 60px;
    padding: 8px 14px;
  }
  
  .category-item span {
    font-size: 12px;
  }
  
  .products-section {
    padding: 16px;
    margin: 16px 12px;
  }
  
  .section-header {
    margin-bottom: 12px;
  }
  
  .section-header h3 {
    font-size: 15px;
  }
  
  .sort-btn {
    font-size: 13px;
  }
  
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  
  .product-card {
    border-radius: 12px;
  }
  
  .product-card:hover {
    transform: none;
  }
  
  .product-image {
    height: 120px;
  }
  
  .product-info {
    padding: 12px;
  }
  
  .product-name {
    font-size: 13px;
  }
  
  .product-desc {
    font-size: 11px;
  }
  
  .current-price {
    font-size: 15px;
  }
  
  .cart-fab {
    bottom: 70px;
    right: 16px;
    width: 56px;
    height: 56px;
  }
}

@media (max-width: 480px) {
  .navbar {
    padding: 0 10px;
    height: 48px;
  }
  
  .nav-title {
    font-size: 15px;
  }
  
  .search-section {
    margin: 12px 8px 0 8px;
    padding: 12px;
  }

  .category-section {
    margin: 8px;
    padding: 8px 12px;
  }

  .products-section {
    margin: 12px 8px;
    padding: 12px;
  }
  
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }
  
  .product-card {
    border-radius: 10px;
  }
  
  .product-image {
    height: 100px;
  }
  
  .product-info {
    padding: 10px;
  }
  
  .product-name {
    font-size: 12px;
  }
  
  .product-desc {
    font-size: 10px;
    margin-bottom: 4px;
  }
  
  .current-price {
    font-size: 14px;
  }
  
  .product-stats {
    font-size: 10px;
    margin-bottom: 4px;
  }
  
  .product-actions {
    padding: 0 10px 10px;
  }
  
  .product-actions .el-button {
     font-size: 12px;
     height: 36px;
   }
  
  .cart-fab {
    bottom: 60px;
    right: 12px;
    width: 52px;
    height: 52px;
  }
  
  .cart-item {
    padding: 12px 0;
  }
  
  .item-image {
    width: 50px;
    height: 50px;
  }
  
  .item-info h4 {
    font-size: 13px;
  }
  
  .item-price {
    font-size: 12px;
  }
  
  .total-points {
    font-size: 16px;
  }
}

@media (max-width: 360px) {
  .navbar {
    padding: 0 8px;
  }
  
  .search-section {
    margin: 8px 6px 0 6px;
    padding: 10px;
  }
  
  .category-section {
    margin: 6px;
    padding: 6px 10px;
  }
  
  .products-section {
    margin: 8px 6px;
    padding: 10px;
  }
  
  .category-list {
    padding: 0 8px;
    gap: 8px;
  }
  
  .category-item {
    min-width: 50px;
    padding: 6px 10px;
  }
  
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 6px;
  }
  
  .product-card {
    border-radius: 8px;
  }
  
  .product-image {
    height: 85px;
  }
  
  .product-info {
    padding: 8px;
  }
  
  .product-name {
    font-size: 11px;
  }
  
  .current-price {
    font-size: 13px;
  }
  
  .product-actions {
    padding: 0 8px 8px;
  }
  
  .product-actions .el-button {
    height: 32px;
    font-size: 11px;
  }
  
  .cart-fab {
    right: 8px;
    width: 48px;
    height: 48px;
  }
}
</style>