src/components/Dashboard.css

/* src/components/Dashboard.css */
.dashboard-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: #f8f9fa;
  font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

/* 顶部栏样式 */
.top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 30px;
  background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.platform-name h2 {
  margin: 0;
  color: white;
  font-size: 24px;
  font-weight: 700;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
}

.user-actions {
  display: flex;
  align-items: center;
  gap: 15px;
}

.admin-center-button {
  padding: 8px 16px;
  background-color: #ff7f50;
  color: white;
  border: none;
  border-radius: 4px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.admin-center-button:hover {
  background-color: #ff6347;
  transform: translateY(-1px);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 10px;
  color: white;
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.username {
  font-weight: 600;
  color: white !important;
}

.logout-button {
  padding: 6px 12px;
  background-color: transparent;
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: white;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
}

.logout-button:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.5);
}

/* 导航标签样式 */
.nav-tabs {
  display: flex;
  background-color: white;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  padding: 0 30px;
}

.tab-button {
  padding: 14px 24px;
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  color: #666;
  transition: all 0.2s;
  position: relative;
}

.tab-button:hover {
  color: #1e3c72;
}

.tab-button.active {
  color: #1e3c72;
  border-bottom-color: #1e3c72;
}

.tab-button.active::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  right: 0;
  height: 3px;
  background-color: #1e3c72;
}

/* 内容区域样式 */
.content-area {
  flex-grow: 1;
  padding: 25px 30px;
  background-color: white;
  margin: 20px;
  border-radius: 8px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.section-search-container {
  display: flex;
  margin-bottom: 25px;
  gap: 10px;
}

.section-search-input {
  flex: 1;
  padding: 10px 16px;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 14px;
  transition: all 0.2s;
}

.section-search-input:focus {
  border-color: #1e3c72;
  box-shadow: 0 0 0 2px rgba(30, 60, 114, 0.2);
}

.search-button, .reset-button {
  padding: 10px 18px;
  border: none;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.search-button {
  background-color: #1e3c72;
  color: white;
}

.search-button:hover {
  background-color: #2a5298;
  transform: translateY(-1px);
}

.reset-button {
  background-color: #f1f1f1;
  color: #555;
}

.reset-button:hover {
  background-color: #e0e0e0;
}

/* 轮播图样式 */
.carousel-container {
  position: relative;
  width: 100%;
  height: 200px;
  overflow: hidden;
  margin-bottom: 30px;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.carousel-slide {
  position: absolute;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.5s ease-in-out;
}

.carousel-slide.active {
  opacity: 1;
}

.carousel-image {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding: 30px;
  color: white;
  background: linear-gradient(135deg, #4b6cb7 0%, #182848 100%);
}

.carousel-image h3 {
  font-size: 28px;
  margin: 0 0 10px 0;
  text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.3);
}

.carousel-image p {
  margin: 5px 0;
  font-size: 16px;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
}

.carousel-dots {
  position: absolute;
  bottom: 15px;
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  gap: 8px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  transition: all 0.2s;
}

.dot.active {
  background-color: white;
  transform: scale(1.2);
}

/* 公告网格样式 */
.announcement-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.announcement-card {
  background-color: white;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  transition: all 0.2s;
  border-left: 4px solid #1e3c72;
  cursor: pointer;
}

.announcement-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.announcement-card h3 {
  margin: 0 0 12px 0;
  color: #1e3c72;
  font-size: 18px;
  font-weight: 600;
}

.announcement-card p {
  margin: 0 0 12px 0;
  color: #555;
  line-height: 1.5;
  font-size: 14px;
}

.announcement-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #888;
  font-size: 13px;
}

/* 推荐区域样式 */
.recommend-section {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid #eee;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.section-title {
  margin: 0;
  color: #1e3c72;
  font-size: 20px;
  font-weight: 600;
}

.refresh-btn {
  padding: 8px 16px;
  background-color: #f1f1f1;
  border: none;
  border-radius: 6px;
  font-weight: 600;
  color: #555;
  cursor: pointer;
  transition: all 0.2s;
}

.refresh-btn:hover {
  background-color: #e0e0e0;
}

.refresh-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.recommend-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}

.recommend-card {
  background-color: white;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  transition: all 0.2s;
  cursor: pointer;
}

.recommend-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.card-poster {
  height: 120px;
  background-color: #f5f5f5;
  display: flex;
  align-items: center;
  justify-content: center;
}

.poster-image {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  font-size: 36px;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-info {
  padding: 15px;
}

.card-title {
  margin: 0 0 8px 0;
  font-size: 16px;
  font-weight: 600;
  color: #333;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.card-meta {
  margin: 0 0 5px 0;
  font-size: 13px;
  color: #666;
}

.card-subtitle {
  margin: 0;
  font-size: 13px;
  color: #888;
}

.card-stats {
  padding: 10px 15px;
  border-top: 1px solid #eee;
  font-size: 13px;
  color: #666;
}

.no-recommendations {
  grid-column: 1 / -1;
  text-align: center;
  padding: 30px;
  color: #888;
  font-size: 15px;
}

/* 上传按钮样式 */
.upload-header {
  margin-bottom: 20px;
}

.upload-btn {
  padding: 10px 20px;
  background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
  color: white;
  border: none;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.upload-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(30, 60, 114, 0.3);
}

/* 筛选区域样式 */
.filter-section {
  background-color: white;
  padding: 15px 20px;
  border-radius: 8px;
  margin-bottom: 25px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.filter-group {
  margin-bottom: 15px;
}

.filter-group h4 {
  margin: 0 0 10px 0;
  font-size: 14px;
  color: #555;
  font-weight: 600;
}

.filter-options {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-btn {
  padding: 6px 12px;
  background-color: #f5f5f5;
  color: #333;  /* 改为黑字 */
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
}

.filter-btn:hover {
  border-color: #1e3c72;
  color: #fbfbfc;
}

.filter-btn.active {
  background-color: #1e3c72;
  color: white;
  border-color: #1e3c72;
}

.confirm-btn {
  padding: 8px 20px;
  background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
  color: white;
  border: none;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.confirm-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(30, 60, 114, 0.3);
}

/* 资源列表样式 */
.resource-list {
  display: grid;
  gap: 15px;
}

.resource-item {
  display: flex;
  align-items: center;
  padding: 15px;
  background-color: white;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  transition: all 0.2s;
  cursor: pointer;
}

.resource-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.resource-poster {
  margin-right: 15px;
  flex-shrink: 0;
}

.poster-image {
  width: 80px;
  height: 110px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  font-size: 28px;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
}

.resource-info {
  flex-grow: 1;
  min-width: 0;
}

.resource-title {
  margin: 0 0 8px 0;
  font-size: 16px;
  font-weight: 600;
  color: #333;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.resource-meta {
  margin: 0 0 5px 0;
  font-size: 13px;
  color: #666;
}

.resource-subtitle {
  margin: 0;
  font-size: 13px;
  color: #888;
}

.resource-stats {
  margin-right: 20px;
  text-align: right;
  min-width: 120px;
}

.stat {
  display: block;
  font-size: 13px;
  color: #666;
  margin-bottom: 5px;
}

.download-btn {
  padding: 8px 16px;
  background: linear-gradient(135deg, #4CAF50 0%, #2E7D32 100%);
  color: white;
  border: none;
  border-radius: 4px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.download-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(46, 125, 50, 0.3);
}

.delete-btn {
  padding: 8px 16px;
  background: linear-gradient(135deg, #ff5e62 0%, #ff2400 100%);
  color: white;
  border: none;
  border-radius: 4px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  margin-left: 10px;
  white-space: nowrap;
}

.delete-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(255, 94, 98, 0.3);
}

/* 分页样式 */
.pagination {
  display: flex;
  justify-content: center;
  margin: 30px 0 20px;
  gap: 8px;
}

.pagination button {
  padding: 8px 14px;
  border: 1px solid #ddd;
  background-color: white;
  color: #333;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 14px;
}

.pagination button:hover:not(.active):not(:disabled) {
  border-color: #1e3c72;
  color: #1e3c72;
}

.pagination button.active {
  background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
  color: white;
  border-color: #1e3c72;
}

.pagination button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* 修改后的模态框样式 */
.post-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999; /* 确保在最上层 */
}

.upload-modal,
.post-modal,
.download-modal {
  background-color: white;
  padding: 25px;
  border-radius: 8px;
  width: 500px;
  max-width: calc(100% - 40px);
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
  position: relative;
  margin: 20px auto; /* 添加一些外边距 */
  max-height: 90vh; /* 限制最大高度 */
  overflow-y: auto; /* 允许内容滚动 */
}

/* 针对移动端的调整 */
@media (max-width: 576px) {
  .post-modal {
    padding: 20px 15px;
    width: 100%;
    margin: 10px;
  }
}

/* 确保模态框关闭按钮在最上层 */
.modal-close-btn {
  position: absolute;
  top: 15px;
  right: 15px;
  background: none;
  border: none;
  font-size: 22px;
  color: #888;
  cursor: pointer;
  transition: all 0.2s;
  z-index: 1;
}

.modal-close-btn:hover {
  color: #555;
  transform: rotate(90deg);
}

/* 表单样式 */
.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: #555;
  font-size: 14px;
}

.form-group input[type="text"],
.form-group input[type="file"],
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 14px;
  transition: all 0.2s;
}

.form-group input[type="text"]:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: #1e3c72;
  box-shadow: 0 0 0 2px rgba(30, 60, 114, 0.2);
}

.form-group textarea {
  min-height: 100px;
  resize: vertical;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 25px;
}

.cancel-btn {
  padding: 10px 18px;
  background-color: #f5f5f5;
  color: #555;
  border: none;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.cancel-btn:hover {
  background-color: #e0e0e0;
}

.submit-btn, .confirm-btn {
  padding: 10px 18px;
  background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
  color: white;
  border: none;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.submit-btn:hover, .confirm-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(30, 60, 114, 0.3);
}

/* 进度条样式 */
.progress-container {
  height: 10px;
  background-color: #f0f0f0;
  border-radius: 5px;
  margin: 15px 0;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(135deg, #4CAF50 0%, #2E7D32 100%);
  transition: width 0.3s;
  border-radius: 5px;
}

/* 加载和错误提示 */
.loading {
  text-align: center;
  padding: 30px;
  color: #666;
  font-size: 16px;
}

.error {
  text-align: center;
  padding: 20px;
  color: #e74c3c;
  font-size: 16px;
  background-color: #fdecea;
  border-radius: 6px;
  margin: 20px 0;
}

/* 响应式调整 */
@media (max-width: 768px) {
  .top-bar {
    padding: 10px 15px;
  }
  
  .nav-tabs {
    padding: 0 15px;
    overflow-x: auto;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
  }
  
  .content-area {
    padding: 15px;
    margin: 10px;
  }
  
  .announcement-grid, .recommend-grid {
    grid-template-columns: 1fr;
  }
  
  .resource-item {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .resource-poster {
    margin-right: 0;
    margin-bottom: 15px;
  }
  
  .resource-stats {
    margin-right: 0;
    margin-top: 10px;
    text-align: left;
    width: 100%;
  }
}