/* 分类页面样式 */
.container {
  display: flex;
  height: 100vh;
  background: #f5f5f5;
}

/* 左侧分类列表 */
.category-sidebar {
  width: 200rpx;
  height: 100%;
  background: #fff;
  flex-shrink: 0;
}

.category-item {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24rpx 16rpx;
  background: #f8f8f8;
  border-bottom: 1rpx solid #eee;
}

.category-item.active {
  background: #fff;
}

.category-indicator {
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6rpx;
  height: 50rpx;
  background: linear-gradient(180deg, #4CAF50, #8BC34A);
  border-radius: 0 6rpx 6rpx 0;
}

.category-name {
  font-size: 26rpx;
  color: #333;
  text-align: center;
  margin-bottom: 6rpx;
}

.category-item.active .category-name {
  color: #4CAF50;
  font-weight: bold;
}

.category-e-name {
  font-size: 20rpx;
  color: #999;
  text-align: center;
}

/* 右侧内容区 */
.content-area {
  flex: 1;
  height: 100%;
  padding: 20rpx;
}

.content-header {
  display: flex;
  align-items: baseline;
  margin-bottom: 20rpx;
}

.content-title {
  font-size: 32rpx;
  font-weight: bold;
  color: #333;
  margin-right: 16rpx;
}

.content-count {
  font-size: 24rpx;
  color: #999;
}

/* 练习表网格 */
.worksheet-grid {
  display: flex;
  flex-wrap: wrap;
  margin: 0 -8rpx;
}

.worksheet-item {
  width: calc(50% - 16rpx);
  margin: 0 8rpx 16rpx;
  background: #fff;
  border-radius: 12rpx;
  overflow: hidden;
  box-shadow: 0 2rpx 8rpx rgba(0, 0, 0, 0.05);
}

.worksheet-cover {
  position: relative;
  width: 100%;
  padding-top: 75%;
  background: #f5f5f5;
}

.cover-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.worksheet-info {
  padding: 12rpx;
}

.worksheet-title {
  display: block;
  font-size: 24rpx;
  color: #333;
  line-height: 1.4;
  height: 67rpx;
}

/* 加载状态 */
.load-status {
  text-align: center;
  padding: 20rpx 0;
  font-size: 24rpx;
  color: #999;
}

/* 空状态 */
.empty-tip {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80rpx 0;
}

.empty-img {
  width: 160rpx;
  height: 160rpx;
  margin-bottom: 16rpx;
  opacity: 0.5;
}

.empty-tip text {
  font-size: 26rpx;
  color: #999;
}