/* 热门竞赛推荐区域 */
.competitions-section {
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}

.competitions-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23e2e8f0" stroke-width="0.5" opacity="0.3"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>') repeat;
  opacity: 0.4;
}

/* 标题区域 - 现代化设计 */
.section-header {
  text-align: center;
  margin-bottom: 60px;
  position: relative;
  z-index: 2;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: #1e293b;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

/* 通用分割线样式 */
.section-divider {
  width: 100px;
  height: 4px;
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  margin: 20px auto 30px;
  border-radius: 2px;
  position: relative;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.section-divider::after {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  border-radius: 4px;
  opacity: 0.15;
  z-index: -1;
  filter: blur(4px);
}

/* 筛选控制区域 */
.filters-control-wrapper {
  max-width: 1000px;
  margin: 0 auto 60px;
  padding: 0 20px;
  position: relative;
  z-index: 2;
}

/* 竞赛类型切换标签 */
.competition-type-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 40px;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  border-radius: 50px;
  padding: 8px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  width: fit-content;
  margin-left: auto;
  margin-right: auto;
}

.type-tab {
  padding: 16px 32px;
  border-radius: 42px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: none;
  background: transparent;
  color: #64748b;
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.type-tab.active {
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  color: white;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
  transform: translateY(-1px);
}

.type-tab:hover:not(.active) {
  background: rgba(99, 102, 241, 0.1);
  color: #6366f1;
}

.tab-text {
  position: relative;
  z-index: 1;
}

/* 学科筛选按钮组 */
.subject-filter-group {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.subject-filter-btn {
  padding: 12px 20px;
  border: 2px solid #e2e8f0;
  border-radius: 25px;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  color: #64748b;
  font-weight: 500;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.subject-filter-btn.active {
  background: linear-gradient(135deg, #ec4899 0%, #f97316 100%);
  border-color: transparent;
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(236, 72, 153, 0.3);
}

.subject-filter-btn:hover:not(.active) {
  border-color: #ec4899;
  background: rgba(236, 72, 153, 0.05);
  color: #ec4899;
  transform: translateY(-1px);
}

.filter-text {
  position: relative;
  z-index: 1;
}

/* 竞赛卡片展示区域 */
.competitions-display-area {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  position: relative;
  z-index: 2;
}

/* 竞赛网格容器 */
.competition-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 60px;
}

/* 状态指示器样式 */
.loading-state,
.empty-state,
.error-state {
  text-align: center;
  padding: 80px 20px;
  color: #64748b;
}

.loading-spinner {
  font-size: 2rem;
  color: #6366f1;
  margin-bottom: 20px;
}

.loading-text,
.empty-text,
.error-text {
  font-size: 1.1rem;
  font-weight: 500;
  margin: 0;
}

.empty-icon,
.error-icon {
  font-size: 3rem;
  margin-bottom: 20px;
  opacity: 0.6;
}

.empty-icon {
  color: #94a3b8;
}

.error-icon {
  color: #ef4444;
}

/* 无竞赛提示样式 */
.no-competitions {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  text-align: center;
  color: #64748b;
  font-size: 1.1rem;
  font-weight: 500;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.9) 0%, rgba(248, 250, 252, 0.8) 100%);
  border-radius: 20px;
  border: 2px dashed #e2e8f0;
  margin: 40px 0;
  min-height: 200px;
  width: 100%;
}

.no-competitions::before {
  content: '🔍';
  font-size: 3rem;
  margin-bottom: 20px;
  opacity: 0.6;
}

/* 热门竞赛推荐模块样式 - 专家级设计 */
.section.card-section {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.98) 0%, rgba(248, 250, 252, 0.95) 100%);
  backdrop-filter: blur(24px);
  border-radius: 32px 32px 0 0;
  box-shadow: 
    0 24px 64px rgba(0, 0, 0, 0.08),
    0 8px 24px rgba(0, 0, 0, 0.04),
    inset 0 1px 0 rgba(255, 255, 255, 0.9),
    inset 0 -1px 0 rgba(0, 0, 0, 0.02);
  max-width: 1200px;
  margin: 0 auto 0;
  padding: 64px 40px 40px;
  border: 1px solid rgba(226, 232, 240, 0.6);
  border-bottom: none;
  width: 100%;
  position: relative;
  overflow: visible;
}

.section.card-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 8px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
  border-radius: 32px 32px 0 0;
}

/* 添加微妙的背景纹理 */
.section.card-section::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 20% 80%, rgba(59, 130, 246, 0.02) 0%, transparent 50%),
              radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.02) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

/* 竞赛类型切换标签 - 现代化设计 */
.competition-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin: 50px auto 40px;
  max-width: 500px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-radius: 60px;
  padding: 8px;
  box-shadow: 
    0 20px 40px rgba(0, 0, 0, 0.08),
    0 8px 16px rgba(0, 0, 0, 0.04),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.tab {
  flex: 1;
  padding: 20px 32px;
  border-radius: 52px;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: none;
  background: transparent;
  color: #64748b;
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  text-align: center;
  min-width: 140px;
}

.tab::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  border-radius: 52px;
  opacity: 0;
  transform: scale(0.8);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: -1;
}

.tab.tab-active {
  color: white;
  font-weight: 700;
  transform: translateY(-1px);
}

.tab.tab-active::before {
  opacity: 1;
  transform: scale(1);
  box-shadow: 0 8px 25px rgba(99, 102, 241, 0.35);
}

.tab:hover:not(.tab-active) {
  color: #6366f1;
  background: rgba(99, 102, 241, 0.08);
  transform: translateY(-1px);
}

/* 学科筛选 - 现代化设计 */
.subject-filters {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin: 40px auto 60px;
  max-width: 800px;
  flex-wrap: wrap;
  padding: 0 20px;
}

.filter-btn {
  padding: 14px 24px;
  border: 2px solid #e2e8f0;
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  color: #64748b;
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  min-width: 80px;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.filter-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, #ec4899 0%, #f97316 100%);
  border-radius: 26px;
  opacity: 0;
  transform: scale(0.9);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: -1;
}

.filter-btn.active {
  border-color: transparent;
  color: white;
  font-weight: 600;
  transform: translateY(-2px);
}

.filter-btn.active::before {
  opacity: 1;
  transform: scale(1);
  box-shadow: 0 8px 25px rgba(236, 72, 153, 0.3);
}

.filter-btn:hover:not(.active) {
  border-color: #ec4899;
  background: rgba(236, 72, 153, 0.05);
  color: #ec4899;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(236, 72, 153, 0.15);
}

/* 竞赛网格容器 - 全宽独立展示 */
.competition-grid-wrapper {
  width: 100vw;
  margin-left: calc(-50vw + 50%);
  background: linear-gradient(145deg, rgba(248, 250, 252, 0.4) 0%, rgba(255, 255, 255, 0.6) 100%);
  border-top: 1px solid rgba(226, 232, 240, 0.3);
  border-bottom: 1px solid rgba(226, 232, 240, 0.3);
  padding: 60px 0 80px;
  margin-top: 40px;
  margin-bottom: 80px;
}

/* 查看更多按钮在新布局中的样式 - 右对齐 */
.competition-grid-wrapper .text-center {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 40px;
  text-align: right;
}

/* 竞赛推荐区域内的查看更多按钮 - 右对齐样式 */
.competitions-section .text-center {
  text-align: right;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
}

/* 首页竞赛展示区域的查看更多按钮 - 与卡片网格右对齐 */
.competition-grid-wrapper.homepage-featured .text-center {
  text-align: right;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 60px 24px;
}

/* 确保首页查看更多按钮的margin设置正确 */
.competition-grid-wrapper.homepage-featured .btn-discover-more {
  margin: 0;
  display: inline-block;
}

/* 竞赛网格布局 - 智能响应式展示 */
.competition-grid {
  display: flex;
  gap: 28px;
  padding: 0 40px;
  max-width: 1400px;
  margin: 0 auto;
  flex-wrap: wrap;
  justify-content: center;
  align-items: stretch;
  position: relative;
  z-index: 1;
  min-height: 400px;
}

/* 少量卡片时的优化布局 */
.competition-grid.few-items {
  justify-content: center;
  gap: 40px;
}

.competition-grid.few-items .competition-item {
  flex: 0 0 calc(45% - 20px);
  max-width: 400px;
  min-width: 350px;
}

/* 大量卡片时的优化布局 */
.competition-grid.many-items {
  justify-content: flex-start;
  gap: 24px;
}

.competition-grid.many-items .competition-item {
  flex: 0 0 calc(33.333% - 16px);
  max-width: 360px;
  min-width: 300px;
}

/* 自定义滚动条样式 */
.competition-grid::-webkit-scrollbar {
  height: 8px;
}

.competition-grid::-webkit-scrollbar-track {
  background: rgba(226, 232, 240, 0.3);
  border-radius: 4px;
}

.competition-grid::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 4px;
  transition: background 0.3s ease;
}

.competition-grid::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(135deg, #5a67d8 0%, #6b46c1 100%);
}

/* 竞赛卡片样式 - 智能响应式设计 */
.competition-item {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.98) 0%, rgba(248, 250, 252, 0.95) 100%);
  backdrop-filter: blur(20px);
  border-radius: 28px;
  box-shadow: 
    0 12px 40px rgba(0, 0, 0, 0.08),
    0 4px 16px rgba(0, 0, 0, 0.04),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
  border: 1px solid rgba(226, 232, 240, 0.6);
  display: flex;
  flex-direction: column;
  height: 380px;
  position: relative;
  flex: 0 0 calc(33.333% - 19px);
  min-width: 320px;
  max-width: 380px;
}

/* 卡片顶部装饰条 */
.competition-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
  border-radius: 28px 28px 0 0;
  z-index: 2;
}

/* 卡片悬停效果 */
.competition-item:hover {
  transform: translateY(-16px) scale(1.03);
  box-shadow: 
    0 32px 64px rgba(0, 0, 0, 0.12),
    0 12px 24px rgba(0, 0, 0, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 1);
}

/* 响应式布局优化 */
@media (max-width: 1200px) {
  .competition-item {
    flex: 0 0 calc(50% - 14px);
    max-width: 450px;
  }
  
  .competition-grid.few-items .competition-item {
    flex: 0 0 calc(50% - 20px);
    max-width: 380px;
  }
  
  .competition-grid.many-items .competition-item {
    flex: 0 0 calc(50% - 12px);
    max-width: 350px;
  }
}

@media (max-width: 768px) {
  .competition-grid-wrapper {
    padding: 40px 0 60px;
  }
  
  .competition-grid {
    gap: 20px;
    padding: 0 20px;
  }
  
  .competition-item,
  .competition-grid.few-items .competition-item,
  .competition-grid.many-items .competition-item {
    flex: 0 0 100%;
    min-width: 280px;
    max-width: 100%;
    height: 360px;
  }
}

@media (max-width: 480px) {
  .competition-grid-wrapper {
    padding: 30px 0 50px;
  }
  
  .competition-grid {
    padding: 0 16px;
  }
  
  .competition-item,
  .competition-grid.few-items .competition-item,
  .competition-grid.many-items .competition-item {
    min-width: 260px;
    height: 340px;
  }
}

/* 卡片头部 */
.competition-item .card-header {
  padding: 32px 28px 24px;
  border-bottom: 1px solid rgba(226, 232, 240, 0.4);
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.8) 0%, rgba(248, 250, 252, 0.6) 100%);
  backdrop-filter: blur(12px);
  position: relative;
  z-index: 1;
}

.competition-item .card-header h3 {
  margin: 0;
  font-size: 1.5rem;
  color: #1e293b;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.025em;
}

/* 卡片主体 */
.competition-item .card-body {
  padding: 24px 28px;
  flex-grow: 1;
  position: relative;
  z-index: 1;
}

.competition-item .card-body p {
  margin: 0;
  color: #64748b;
  line-height: 1.7;
  font-weight: 500;
  font-size: 0.95rem;
}

/* 卡片底部 */
.competition-item .card-footer {
  padding: 24px 28px 32px;
  border-top: 1px solid rgba(226, 232, 240, 0.4);
  text-align: center;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.8) 0%, rgba(248, 250, 252, 0.6) 100%);
  backdrop-filter: blur(12px);
  position: relative;
  z-index: 1;
}

/* 静态竞赛卡片样式 */
.competition-item .card-left {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 15px;
  margin-right: 20px;
  flex-shrink: 0;
}

.competition-item .card-left i {
  font-size: 2rem;
  color: white;
}

.competition-item .card-right {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.competition-item .card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 15px;
  padding: 0;
  border: none;
  background: none;
  backdrop-filter: none;
}

.competition-item .card-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: #2c3e50;
  line-height: 1.4;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.competition-item .card-status {
  padding: 6px 12px;
  border-radius: 20px;
  color: white;
  font-size: 0.85rem;
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
}

.competition-item .whitelist-tag {
  background: linear-gradient(135deg, #ff6b6b, #ee5a24);
  color: white;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: 0 2px 8px rgba(255, 107, 107, 0.3);
}

.competition-item .card-info-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 10px;
}

.competition-item .info-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.competition-item .card-label {
  font-size: 0.85rem;
  color: #718096;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.competition-item .card-value {
  font-size: 0.95rem;
  color: #2d3748;
  font-weight: 500;
  line-height: 1.4;
}

/* 响应式调整 */
@media (max-width: 1280px) {
  .section.card-section {
    margin: 0 40px 60px;
    width: calc(100% - 80px);
  }
}

/* 无竞赛信息提示样式 */
.no-competitions {
  text-align: center;
  padding: 60px 20px;
  color: #666;
  font-size: 16px;
  background: rgba(255, 255, 255, 0.8);
  border-radius: 15px;
  border: 2px dashed #ddd;
  margin: 20px 0;
}

/* 加载和错误状态样式 */
.loading-indicator {
  color: #667eea;
  font-size: 16px;
}

.loading-indicator i {
  margin-right: 10px;
  font-size: 18px;
}

.error-message {
  background: rgba(231, 76, 60, 0.1);
  border: 1px solid rgba(231, 76, 60, 0.3);
  border-radius: 10px;
  padding: 20px;
  margin: 20px 0;
}

/* 响应式设计 - 大屏幕设备 */
@media (max-width: 1280px) {
  .section.card-section {
    padding: 50px 40px;
    margin: 0 20px 50px;
  }
  
  .competition-grid {
    gap: 30px;
  }
}

/* 响应式设计 - 平板设备 */
@media (max-width: 1024px) {
  .section.card-section {
    padding: 40px 30px;
    margin: 0 15px 40px;
  }
  
  .competition-tabs {
    gap: 20px;
    margin: 30px 0;
  }
  
  .tab {
    padding: 15px 35px;
    font-size: 15px;
  }
  
  .subject-filters {
    gap: 15px;
    margin: 25px 0 35px 0;
  }
  
  .filter-btn {
    padding: 12px 28px;
    font-size: 13px;
  }
  
  .competition-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
  }
  
  .competition-item .card-header,
  .competition-item .card-body,
  .competition-item .card-footer {
    padding: 20px;
  }
  
  .competition-item .card-header h3 {
    font-size: 1.3rem;
  }
}

/* 响应式设计 - 手机设备 */
@media (max-width: 768px) {
  .section.card-section {
    padding: 30px 20px;
    margin: 0 10px 30px;
    border-radius: 20px;
  }
  
  .competition-tabs {
    flex-direction: column;
    gap: 15px;
    margin: 25px 0;
  }
  
  .tab {
    padding: 12px 30px;
    font-size: 14px;
    border-radius: 25px;
  }
  
  .subject-filters {
    gap: 10px;
    margin: 20px 0 30px 0;
  }
  
  .filter-btn {
    padding: 10px 24px;
    font-size: 12px;
    border-radius: 20px;
  }
  
  .competition-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .competition-item {
    border-radius: 20px;
  }
  
  .competition-item .card-header,
  .competition-item .card-body,
  .competition-item .card-footer {
    padding: 18px;
  }
  
  .competition-item .card-header h3 {
    font-size: 1.2rem;
  }
  
  .competition-item .card-body p {
    font-size: 0.9rem;
  }
  
  .btn-discover-more {
    padding: 15px 40px;
    font-size: 15px;
    border-radius: 25px;
  }
  
  .competition-tags {
    gap: 8px;
    margin-top: 12px;
  }
  
  .tag {
    padding: 5px 12px;
    font-size: 0.8rem;
    border-radius: 15px;
  }
}



/* 标签样式 */
.tag {
  display: inline-block;
  padding: 4px 8px;
  margin-right: 8px;
  border-radius: 12px;
  font-size: 0.875rem;
}

.tag-national { background: #ff6b1a; color: white; }
.tag-international { background: #2c3e50; color: white; }
.tag-regional { background: #3498db; color: white; }
.tag-secondary { background: #e74c3c; color: white; }
.tag-math, .tag-programming, .tag-science, .tag-english, .tag-chinese { background: #2ecc71; color: white; }

/* 竞赛标签样式 */
.competition-tags {
  display: flex;
  gap: 10px;
  margin-top: 15px;
  flex-wrap: wrap;
}

.tag {
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.tag.level {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.tag.subject {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  color: white;
  box-shadow: 0 4px 12px rgba(240, 147, 251, 0.3);
}

.tag.status {
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  color: white;
  box-shadow: 0 4px 12px rgba(79, 172, 254, 0.3);
}

/* 查看更多按钮 */
.btn-discover-more {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  padding: 18px 50px;
  border-radius: 35px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 12px 30px rgba(102, 126, 234, 0.3);
  position: relative;
  overflow: hidden;
  text-decoration: none;
  display: inline-block;
  align-items: center;
  margin: 40px 0 0 0;
}

.btn-discover-more::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  transition: left 0.6s;
}

.btn-discover-more:hover::before {
  left: 100%;
}

.btn-discover-more:hover {
  transform: translateY(-5px) scale(1.05);
  box-shadow: 0 20px 40px rgba(102, 126, 234, 0.4);
  color: white;
  text-decoration: none;
}

.btn-discover-more:active {
  transform: translateY(-2px) scale(1.02);
}

/* 响应式设计 - 平板设备 */
@media (max-width: 1024px) {
  .competitions-section {
    padding: 60px 0;
  }
  
  .section-title {
    font-size: 2.2rem;
  }
  
  .filters-control-wrapper {
    margin-bottom: 50px;
    padding: 0 15px;
  }
  
  .competition-cards-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
  }
  
  .competitions-display-area {
    padding: 0 15px;
  }
}

/* 响应式设计 - 移动设备 */
@media (max-width: 768px) {
  .competitions-section {
    padding: 40px 0;
  }
  
  .section-title {
    font-size: 1.8rem;
  }
  
  .filters-control-wrapper {
    margin-bottom: 40px;
    padding: 0 10px;
  }
  
  .competition-type-tabs {
    flex-direction: column;
    gap: 4px;
    padding: 6px;
  }
  
  .type-tab {
    padding: 14px 24px;
    font-size: 14px;
  }
  
  .subject-filter-group {
    gap: 8px;
  }
  
  .subject-filter-btn {
    padding: 10px 16px;
    font-size: 13px;
  }
  
  .competition-cards-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .competitions-display-area {
    padding: 0 10px;
  }
  
  .filter-btn {
    padding: 10px 18px;
    font-size: 13px;
  }
  
  .competition-grid {
    padding: 25px 10px 15px;
    gap: 20px;
    margin-top: 25px;
  }
  
  .competition-item {
    border-radius: 20px;
    flex: 0 0 calc(100% - 20px);
    min-width: 280px;
    padding: 20px;
    min-height: auto;
  }
  
  .competition-item .card-left {
    margin-right: 0;
    margin-bottom: 15px;
    align-self: center;
  }
  
  .competition-item .card-header {
    flex-direction: column;
    align-items: center;
    gap: 10px;
    text-align: center;
    padding: 20px;
  }
  
  .competition-item .card-body {
    padding: 20px;
  }
  
  .competition-item .card-title {
    font-size: 1.1rem;
    justify-content: center;
  }
  
  .competition-item .card-info-container {
    grid-template-columns: 1fr;
    gap: 15px;
    margin-top: 15px;
  }
  
  .competition-item .info-item {
    text-align: center;
  }
}

/* 响应式设计 - 专家级移动端适配 */
@media (max-width: 768px) {
  .section.card-section {
    padding: 48px 24px;
    margin: 0 16px 64px;
    border-radius: 24px;
  }
  
  .competition-grid {
    gap: 20px;
    padding: 24px 0;
  }
  
  .competition-item {
    flex: 0 0 calc(85% - 10px);
    min-width: 300px;
    max-width: 380px;
  }
  
  .competition-tabs {
    gap: 16px;
    margin: 32px 0;
  }
  
  .tab {
    padding: 14px 28px;
    font-size: 14px;
  }
  
  .subject-filters {
    gap: 12px;
    margin: 24px 0 32px 0;
  }
  
  .filter-btn {
    padding: 10px 20px;
    font-size: 13px;
  }
}

@media (max-width: 480px) {
  .section.card-section {
    padding: 40px 20px;
    margin: 0 12px 48px;
    border-radius: 20px;
  }
  
  .competition-tabs {
    flex-direction: column;
    gap: 12px;
    margin: 24px 0;
  }
  
  .tab {
    padding: 12px 24px;
    font-size: 13px;
  }
  
  .subject-filters {
    gap: 8px;
    margin: 20px 0 24px 0;
  }
  
  .filter-btn {
    padding: 8px 16px;
    font-size: 12px;
  }
  
  .competition-grid {
    gap: 16px;
    padding: 20px 0;
  }
  
  .competition-item {
    flex: 0 0 calc(90% - 8px);
    min-width: 280px;
    max-width: 320px;
  }
  
  .competition-item .card-header {
    padding: 24px 20px 18px;
  }
  
  .competition-item .card-header h3 {
    font-size: 1.3rem;
  }
  
  .competition-item .card-body {
    padding: 18px 20px;
  }
  
  .competition-item .card-footer {
    padding: 18px 20px 24px;
  }
}

/* 操作按钮区域 */
.section-actions {
  text-align: center;
  margin-top: 40px;
  position: relative;
  z-index: 2;
}

/* 发现更多按钮 */
.discover-more-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 32px;
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  color: white;
  text-decoration: none;
  border-radius: 50px;
  font-weight: 600;
  font-size: 15px;
  box-shadow: 0 8px 32px rgba(99, 102, 241, 0.3);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  border: none;
}

.discover-more-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.6s;
}

.discover-more-btn:hover::before {
  left: 100%;
}

.discover-more-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(99, 102, 241, 0.4);
  background: linear-gradient(135deg, #8b5cf6 0%, #6366f1 100%);
}

.btn-text {
  position: relative;
  z-index: 1;
}

.discover-more-btn i {
  position: relative;
  z-index: 1;
  transition: transform 0.3s ease;
}

.discover-more-btn:hover i {
  transform: translateX(4px);
}

/* 标题样式 */
#competitions h2 {
  font-size: 2.3rem;
  font-weight: 700;
  margin-bottom: 32px;
  letter-spacing: 2px;
  color: #2c3e50;
  text-align: center;
}

.section-divider {
  height: 3px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  margin-bottom: 32px;
  border-radius: 2px;
  max-width: 100px;
  margin-left: auto;
  margin-right: auto;
}

/* 修复竞赛详情页面布局问题 - 确保使用正确的容器样式 */
.competition-detail-section .container {
  display: block !important;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  /* 重置任何可能的flex相关属性 */
  flex-direction: initial;
  justify-content: initial;
  align-items: initial;
}

/* 确保在所有屏幕尺寸下竞赛详情页面的container都使用block布局 */
@media (max-width: 768px) {
  .competition-detail-section .container {
    display: block !important;
    flex-direction: initial !important;
  }
}

/* 确保竞赛详情页面的正文内容正常显示 */
.competition-detail-section {
  padding: 40px 0;
}

.competition-detail-section h2 {
  color: #2c3e50;
  margin-bottom: 20px;
  font-size: 1.8rem;
  font-weight: 600;
}

.competition-detail-section p,
.competition-detail-section ul,
.competition-detail-section ol {
  line-height: 1.6;
  margin-bottom: 16px;
  color: #333;
}

.competition-detail-section ul,
.competition-detail-section ol {
  padding-left: 20px;
}

.competition-detail-section li {
  margin-bottom: 8px;
}

/* 标签样式 */
.competition-detail-section .tag {
  display: inline-block;
  padding: 6px 12px;
  margin: 4px 8px 4px 0;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.3s ease;
}

.competition-detail-section .tag-international {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.competition-detail-section .tag-secondary {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  color: white;
}

.competition-detail-section .tag-math {
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  color: white;
}