/* 进一步优化移动端卡片和网格布局 */
@media (max-width: 600px) {
  .content-grid {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 0 2px;
  }
  .course-card,
  .product-card {
    padding: 10px;
    border-radius: 10px;
    font-size: 0.98rem;
  }
  .course-card h3,
  .product-card h3 {
    font-size: 1rem;
  }
  .tag,
  .mini-badge {
    padding: 4px 8px;
    font-size: 0.75rem;
  }
  .card-actions {
    flex-direction: column;
    gap: 8px;
  }
  .primary-button {
    min-height: 38px;
    font-size: 0.98rem;
    padding: 0 10px;
  }
}
/* ========== 课程页面 UI 改进方案 ========== */

/* 课程网格改进 - 更美观的卡片布局 */
.content-grid {
  display: grid;
  gap: 28px;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  padding: 0;
}

/* 课程卡片样式改进 */
.course-card,
.product-card,
[class*="card"] {
  display: grid;
  gap: 16px;
  padding: 24px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.04) 0%,
    rgba(255, 255, 255, 0.02) 100%
  );
  backdrop-filter: blur(8px);
  transition: all 300ms cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
  position: relative;
}

/* 卡片悬停效果 */
.course-card:hover,
.product-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  background: linear-gradient(
    135deg,
    rgba(247, 178, 103, 0.08) 0%,
    rgba(247, 178, 103, 0.04) 100%
  );
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.2),
              0 0 24px rgba(247, 178, 103, 0.1);
}

/* 卡片背景装饰 */
.course-card::before,
.product-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(247, 178, 103, 0.08), transparent);
  border-radius: 50%;
  pointer-events: none;
}

.course-card::after,
.product-card::after {
  content: '';
  position: absolute;
  bottom: -50%;
  left: -50%;
  width: 150px;
  height: 150px;
  background: radial-gradient(circle, rgba(120, 198, 163, 0.06), transparent);
  border-radius: 50%;
  pointer-events: none;
}

/* 卡片内容相对定位 */
.course-card > *,
.product-card > * {
  position: relative;
  z-index: 1;
}

/* 课程标题样式 */
.course-card h3,
.product-card h3 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text);
  text-decoration: none;
}

/* 课程描述 */
.course-card p,
.product-card p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-muted);
}

/* 课程标签 */
.course-tags,
.product-tags,
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0 0;
}

.tag,
.mini-badge {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(247, 178, 103, 0.12);
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: all 200ms ease;
}

.tag:hover,
.mini-badge:hover {
  background: rgba(247, 178, 103, 0.24);
  transform: translateX(2px);
}

/* 课程信息面板 */
.course-info,
.product-info {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  padding: 14px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.02);
}

.course-info-item,
.product-info-item {
  display: grid;
  gap: 4px;
}

.course-info-label,
.product-info-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.course-info-value,
.product-info-value {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
}

/* 课程操作按钮 */
.course-actions,
.product-actions {
  display: flex;
  gap: 12px;
  margin-top: 12px;
}

.course-action-btn,
.product-action-btn,
.cta-button {
  flex: 1;
  padding: 10px 16px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 200ms ease;
  text-align: center;
  text-decoration: none;
}

.course-action-btn:hover,
.product-action-btn:hover,
.cta-button:hover {
  background: rgba(247, 178, 103, 0.12);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

.course-action-btn.primary,
.product-action-btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
}

.course-action-btn.primary:hover,
.product-action-btn.primary:hover {
  background: var(--accent-strong);
  border-color: var(--accent-strong);
}

/* 课程成本显示 */
.course-cost,
.product-cost {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  border-radius: 8px;
  background: rgba(120, 198, 163, 0.12);
  color: var(--mint);
  font-size: 0.9rem;
  font-weight: 600;
}

/* 课程评分 */
.course-rating,
.product-rating {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.rating-stars {
  display: flex;
  gap: 2px;
  color: var(--accent);
}

.rating-value {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
}

.rating-count {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* 部分标题改进 */
.section-head {
  display: grid;
  gap: 16px;
  padding: 44px 0 28px;
  border-bottom: 1px solid var(--line);
}

.section-head > div {
  display: grid;
  gap: 8px;
}

.section-head h2 {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.2;
}

.section-head .eyebrow {
  margin: 0;
}

.section-note {
  margin: 0;
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 响应式改进 */
@media (max-width: 1024px) {
  .content-grid {
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 24px;
  }
  
  .course-info {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .content-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .course-card,
  .product-card {
    padding: 20px;
  }
  
  .course-actions,
  .product-actions {
    flex-direction: column;
  }
  
  .section-head {
    padding: 32px 0 24px;
  }
  
  .section-head h2 {
    font-size: 1.6rem;
  }
}

@media (max-width: 480px) {
  .course-card,
  .product-card {
    padding: 16px;
    gap: 12px;
  }
  
  .course-card h3,
  .product-card h3 {
    font-size: 1.1rem;
  }
  
  .course-info {
    grid-template-columns: 1fr;
  }
  
  .tag,
  .mini-badge {
    padding: 5px 10px;
    font-size: 0.8rem;
  }
}