:root {
  --primary-color: #007AFF;
  --secondary-color: #5AC8FA;
  --success-color: #34C759;
  --danger-color: #FF3B30;
  --warning-color: #FF9500;
  --background-color: #F2F2F7;
  --card-color: #FFFFFF;
  --text-color: #1C1C1E;
  --text-secondary: #8E8E93;
  --border-color: #E5E5EA;
  --border-radius: 10px;
  --box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --transition: all 0.2s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-family);
  background-color: var(--background-color);
  color: var(--text-color);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

header {
  margin-bottom: 30px;
  text-align: center;
}

h1 {
  font-weight: 600;
  font-size: 28px;
  color: var(--text-color);
  margin-bottom: 10px;
}

/* 添加商品 */
.add-product {
  background-color: var(--card-color);
  border-radius: var(--border-radius);
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: var(--box-shadow);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

.input-group {
  display: flex;
  gap: 10px;
  flex: 1;
}

input[type="text"] {
  flex: 1;
  padding: 12px 15px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 14px;
  outline: none;
  transition: var(--transition);
}

textarea {
  flex: 1;
  padding: 12px 15px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 14px;
  outline: none;
  transition: var(--transition);
  resize: vertical;
  min-height: 80px;
}

input[type="text"]:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(0, 122, 255, 0.2);
}

textarea:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(0, 122, 255, 0.2);
}

button {
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: var(--border-radius);
  padding: 12px 20px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

button:hover {
  background-color: #0062cc;
}

.secondary-btn {
  background-color: var(--background-color);
  color: var(--primary-color);
  border: 1px solid var(--primary-color);
  margin-left: 10px;
}

.secondary-btn:hover {
  background-color: rgba(0, 122, 255, 0.1);
}

/* 商品列表 */
.product-list {
  background-color: var(--card-color);
  border-radius: var(--border-radius);
  padding: 20px;
  box-shadow: var(--box-shadow);
}

.table-actions {
  display: flex;
  justify-content: space-between;
  margin-bottom: 15px;
  align-items: center;
}

.results-info {
  font-size: 14px;
  color: var(--text-secondary);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th, td {
  text-align: left;
  padding: 12px 15px;
  border-bottom: 1px solid var(--border-color);
}

th {
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
}

th a {
  color: var(--text-secondary);
  text-decoration: none;
  display: flex;
  align-items: center;
}

th a:hover {
  color: var(--primary-color);
}

.sort-icon {
  margin-left: 5px;
}

tbody tr:hover {
  background-color: rgba(0, 0, 0, 0.02);
}

.product-name {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  display: block;
  max-width: 300px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.product-name:hover {
  text-decoration: underline;
}

.actions {
  display: flex;
  gap: 10px;
}

.download-btn, .delete-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 16px;
  padding: 5px;
  border-radius: 5px;
  transition: var(--transition);
}

.download-btn {
  color: var(--primary-color);
}

.delete-btn {
  color: var(--danger-color);
}

.download-btn:hover, .delete-btn:hover {
  background-color: rgba(0, 0, 0, 0.05);
}

.no-data {
  text-align: center;
  color: var(--text-secondary);
  padding: 30px;
}

/* 加载中遮罩 */
#loadingOverlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.8);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.loading-container {
  background-color: var(--card-color);
  padding: 20px 30px;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  text-align: center;
}

.spinner {
  width: 40px;
  height: 40px;
  margin: 0 auto 15px;
  border: 3px solid rgba(0, 0, 0, 0.1);
  border-radius: 50%;
  border-top-color: var(--primary-color);
  animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.hidden {
  display: none;
}

/* 确认对话框 */
.dialog {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1100;
}

.dialog-content {
  background-color: var(--card-color);
  border-radius: var(--border-radius);
  padding: 25px;
  width: 400px;
  max-width: 90%;
}

.dialog h2 {
  font-size: 18px;
  margin-bottom: 15px;
}

.dialog p {
  margin-bottom: 20px;
  color: var(--text-secondary);
}

.dialog-buttons {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

#cancelDeleteBtn {
  background-color: var(--background-color);
  color: var(--text-color);
}

#confirmDeleteBtn {
  background-color: var(--danger-color);
}

#confirmDeleteBtn:hover {
  background-color: #e60000;
}

/* 错误页面 */
.error-page {
  text-align: center;
  padding: 60px 20px;
}

.error-page h1 {
  font-size: 24px;
  margin-bottom: 20px;
}

.error-page p {
  margin-bottom: 30px;
  color: var(--text-secondary);
}

.btn {
  display: inline-block;
  background-color: var(--primary-color);
  color: white;
  text-decoration: none;
  padding: 10px 20px;
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.btn:hover {
  background-color: #0062cc;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .add-product {
    flex-direction: column;
    align-items: stretch;
  }
  
  .secondary-btn {
    margin-left: 0;
    margin-top: 10px;
  }
  
  table {
    display: block;
    overflow-x: auto;
  }
}

/* 强制隐藏类 */
.hidden, 
.dialog.hidden,
#confirmDialog.hidden {
    display: none !important;
    visibility: hidden !important;
    opacity: 0 !important;
    z-index: -9999 !important;
    position: absolute !important;
    pointer-events: none !important;
}

/* 添加提示文字样式 */
.tip {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 5px;
  margin-bottom: 10px;
}