/* =====================================================
   统一版本分发平台 - 产品级设计系统
   ===================================================== */

/* ============ CSS Variables ============ */
:root {
  /* 颜色系统 */
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-light: #e0e7ff;
  --success: #10b981;
  --success-hover: #059669;
  --success-light: #d1fae5;
  --warning: #f59e0b;
  --warning-hover: #d97706;
  --warning-light: #fef3c7;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --danger-light: #fee2e2;
  --info: #3b82f6;
  --info-hover: #2563eb;
  --info-light: #dbeafe;

  /* 中性色 */
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;

  /* 背景色 */
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-tertiary: #f3f4f6;
  --bg-overlay: rgba(0, 0, 0, 0.5);

  /* 文本色 */
  --text-primary: #111827;
  --text-secondary: #4b5563;
  --text-tertiary: #6b7280;
  --text-inverse: #ffffff;

  /* 边框色 */
  --border-light: #e5e7eb;
  --border-default: #d1d5db;
  --border-dark: #9ca3af;

  /* 阴影 */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

  /* 圆角 */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* 间距 */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  /* 过渡动画 */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;

  /* 字体 */
  --font-sans: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* 布局 */
  --header-height: 4rem;
  --sidebar-width: 16rem;
}

/* ============ 暗色模式 ============ */
[data-theme="dark"] {
  --primary: #6366f1;
  --primary-hover: #818cf8;
  --primary-light: #1e1b4b;
  --success-light: #064e3b;
  --warning-light: #78350f;
  --danger-light: #7f1d1d;
  --info-light: #1e3a5f;

  --bg-primary: #111827;
  --bg-secondary: #1f2937;
  --bg-tertiary: #374151;
  --bg-overlay: rgba(0, 0, 0, 0.7);

  --text-primary: #f9fafb;
  --text-secondary: #d1d5db;
  --text-tertiary: #9ca3af;

  --border-light: #374151;
  --border-default: #4b5563;
  --border-dark: #6b7280;

  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4);
}

/* ============ 基础重置 ============ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
}

/* ============ 布局容器 ============ */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--spacing-xl);
}

@media (max-width: 768px) {
  .container {
    padding: var(--spacing-md);
  }
}

/* ============ 头部导航 ============ */
.header {
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
  text-decoration: none;
}

.header-brand:hover {
  color: var(--primary);
}

.header-brand svg {
  width: 2rem;
  height: 2rem;
  color: var(--primary);
}

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.header-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.header-nav a:hover {
  color: var(--primary);
  background-color: var(--primary-light);
}

.header-nav a.active {
  color: var(--primary);
  background-color: var(--primary-light);
}

.header-user {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.header-user-avatar {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary), var(--info));
  color: var(--text-inverse);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 1rem;
}

.header-user-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  color: var(--text-primary);
  padding: 4px 8px;
  border-radius: var(--radius-md);
  transition: background 0.2s;
  white-space: nowrap;
  flex-wrap: nowrap;
}

.header-user-link:hover {
  background: var(--bg-secondary);
}

/* 汉堡菜单按钮 */
.header-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-md);
  color: var(--text-primary);
  flex-direction: column;
  gap: 5px;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  min-width: 44px;
}

.header-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: transform 0.25s, opacity 0.2s;
}

/* 移动端导航遮罩 */
.mobile-nav-overlay {
  position: fixed;
  inset: var(--header-height) 0 0 0;
  background: var(--bg-overlay);
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s, visibility 0.25s;
}

.mobile-nav-overlay.active {
  opacity: 1;
  visibility: visible;
}

.mobile-nav-panel {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-light);
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mobile-nav-panel a {
  display: block;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 1rem;
  transition: background 0.15s, color 0.15s;
  min-height: 44px;
  display: flex;
  align-items: center;
}

.mobile-nav-panel a:hover,
.mobile-nav-panel a.active {
  color: var(--primary);
  background-color: var(--primary-light);
}

@media (max-width: 768px) {
  .header-hamburger {
    display: flex;
  }

  .header-nav {
    display: none;
  }

  .header-inner {
    padding: 0 var(--spacing-md);
  }

  .header-brand span {
    font-size: 1rem;
  }

  .header-user-link span.text-sm {
    display: none;
  }
}

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.25;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  user-select: none;
  text-decoration: none;
  white-space: nowrap;
  min-height: 2.5rem;
}

.btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

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

/* 按钮变体 */
.btn-primary {
  background-color: var(--primary);
  color: var(--text-inverse);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--primary-hover);
  box-shadow: var(--shadow-md);
}

.btn-success {
  background-color: var(--success);
  color: var(--text-inverse);
}

.btn-success:hover:not(:disabled) {
  background-color: var(--success-hover);
}

.btn-warning {
  background-color: var(--warning);
  color: var(--text-primary);
}

.btn-warning:hover:not(:disabled) {
  background-color: var(--warning-hover);
}

.btn-danger {
  background-color: var(--danger);
  color: var(--text-inverse);
}

.btn-danger:hover:not(:disabled) {
  background-color: var(--danger-hover);
}

.btn-secondary {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: var(--border-light);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--gray-200);
  border-color: var(--border-default);
}

/* 按钮尺寸 */
.btn-sm {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 0.75rem;
  min-height: 2rem;
}

.btn-lg {
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: 1rem;
  min-height: 3rem;
}

/* 图标按钮 */
.btn-icon {
  padding: var(--spacing-sm);
  min-width: 2.5rem;
}

/* ============ 表单 ============ */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  min-height: 2.5rem;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.form-input:disabled {
  background-color: var(--bg-tertiary);
  cursor: not-allowed;
}

.form-input::placeholder {
  color: var(--text-tertiary);
}

.form-textarea {
  min-height: 6rem;
  resize: vertical;
}

.form-checkbox {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
}

.form-checkbox input[type="checkbox"] {
  width: 1.25rem;
  height: 1.25rem;
  cursor: pointer;
}

.form-error {
  color: var(--danger);
  font-size: 0.75rem;
  margin-top: var(--spacing-xs);
}

.form-hint {
  color: var(--text-tertiary);
  font-size: 0.75rem;
  margin-top: var(--spacing-xs);
}

/* ============ 卡片 ============ */
.card {
  background-color: var(--bg-primary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card-header {
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-body {
  padding: var(--spacing-lg);
}

@media (max-width: 640px) {
  .card-body {
    padding: var(--spacing-md);
  }

  .card-header {
    padding: var(--spacing-md);
  }

  .card-footer {
    padding: var(--spacing-md);
  }
}

.card-footer {
  padding: var(--spacing-md) var(--spacing-lg);
  border-top: 1px solid var(--border-light);
  background-color: var(--bg-secondary);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

/* ============ 统计卡片 ============ */
.stat-card {
  background-color: var(--bg-primary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  transition: all var(--transition-base);
}

.stat-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.stat-card-icon {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.stat-card-icon.primary {
  background-color: var(--primary-light);
  color: var(--primary);
}

.stat-card-icon.success {
  background-color: var(--success-light);
  color: var(--success);
}

.stat-card-icon.warning {
  background-color: var(--warning-light);
  color: var(--warning);
}

.stat-card-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
}

.stat-card-label {
  font-size: 0.875rem;
  color: var(--text-tertiary);
}

/* ============ 网格布局 ============ */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* ============ 标签 ============ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.badge-primary {
  background-color: var(--primary-light);
  color: var(--primary);
}

.badge-success {
  background-color: var(--success-light);
  color: var(--success);
}

.badge-warning {
  background-color: var(--warning-light);
  color: var(--warning);
}

.badge-danger {
  background-color: var(--danger-light);
  color: var(--danger);
}

.badge-secondary {
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
}

/* ============ 表格 ============ */
.table-container {
  overflow-x: auto;
  background-color: var(--bg-primary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.table th,
.table td {
  padding: var(--spacing-md) var(--spacing-lg);
  text-align: left;
  border-bottom: 1px solid var(--border-light);
}

.table th {
  background-color: var(--bg-secondary);
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

.table tbody tr {
  transition: background-color var(--transition-fast);
}

.table tbody tr:hover {
  background-color: var(--bg-secondary);
}

.table tbody tr:last-child td {
  border-bottom: none;
}

.table-actions {
  display: flex;
  gap: var(--spacing-sm);
}

/* ============ 分页 ============ */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-lg);
}

.pagination-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border-light);
  background-color: var(--bg-primary);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  font-size: 0.875rem;
}

.pagination-btn:hover:not(:disabled) {
  background-color: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
}

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

.pagination-btn.active {
  background-color: var(--primary);
  border-color: var(--primary);
  color: var(--text-inverse);
}

.pagination-info {
  color: var(--text-tertiary);
  font-size: 0.875rem;
}

/* ============ 标签页 ============ */
.tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--border-light);
  margin-bottom: var(--spacing-lg);
}

.tab-btn {
  padding: var(--spacing-md) var(--spacing-lg);
  border: none;
  background: none;
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-tertiary);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all var(--transition-base);
}

.tab-btn:hover {
  color: var(--text-primary);
}

.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.tab-content {
  display: none;
  animation: fadeIn var(--transition-slow);
}

.tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============ 模态框 ============ */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-overlay);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  transition: opacity var(--transition-slow);
}

.modal-overlay.active {
  display: flex;
  opacity: 1;
}

.modal {
  background-color: var(--bg-primary);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  max-width: 600px;
  width: 90%;
  max-height: 90vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transform: scale(0.95) translateY(10px);
  transition: transform var(--transition-slow);
}

.modal-overlay.active .modal {
  transform: scale(1) translateY(0);
}

.modal-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 1.125rem;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
  color: var(--text-tertiary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}

.modal-body {
  padding: var(--spacing-lg);
  overflow-y: auto;
  flex: 1;
  min-height: 0;
}

.modal-footer {
  padding: var(--spacing-md) var(--spacing-lg);
  border-top: 1px solid var(--border-light);
  display: flex;
  justify-content: flex-end;
  gap: var(--spacing-md);
  background-color: var(--bg-secondary);
}

@media (max-width: 640px) {
  .modal {
    width: 100%;
    max-height: 100vh;
    border-radius: 0;
  }
}

/* ============ Toast 通知 ============ */
.toast-container {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border-left: 4px solid var(--primary);
  min-width: 280px;
  max-width: 400px;
  pointer-events: auto;
  animation: slideInRight var(--transition-slow);
}

@media (max-width: 640px) {
  .toast-container {
    left: var(--spacing-md);
    right: var(--spacing-md);
  }

  .toast {
    min-width: auto;
    max-width: 100%;
  }
}

.toast-success {
  border-left-color: var(--success);
}

.toast-error {
  border-left-color: var(--danger);
}

.toast-warning {
  border-left-color: var(--warning);
}

.toast-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
}

.toast-content {
  flex: 1;
}

.toast-title {
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: var(--spacing-xs);
}

.toast-message {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.toast-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-tertiary);
  padding: var(--spacing-xs);
}

@keyframes slideInRight {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes slideOutRight {
  from { transform: translateX(0); opacity: 1; }
  to { transform: translateX(100%); opacity: 0; }
}

/* ============ 代码块 ============ */
.code-block {
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  overflow-x: auto;
  position: relative;
}

.code-block code {
  color: var(--text-primary);
}

.code-copy-btn {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.75rem;
  transition: all var(--transition-fast);
}

.code-copy-btn:hover {
  background-color: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
}

/* ============ 工具栏 ============ */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
}

.toolbar-left,
.toolbar-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

@media (max-width: 640px) {
  .toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .toolbar-left,
  .toolbar-right {
    flex-wrap: wrap;
  }

  .toolbar .search-box {
    flex: 1;
  }

  .toolbar .search-box input {
    width: 100%;
  }
}

.search-box {
  position: relative;
}

.search-box input {
  padding-left: 2.5rem;
}

.search-box-icon {
  position: absolute;
  left: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
  pointer-events: none;
}

/* ============ 空状态 ============ */
.empty-state {
  text-align: center;
  padding: var(--spacing-2xl);
  color: var(--text-tertiary);
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  opacity: 0.5;
}

.empty-state-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

.empty-state-description {
  font-size: 0.875rem;
}

/* ============ 加载状态 ============ */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-2xl);
}

.loading-spinner {
  width: 2rem;
  height: 2rem;
  border: 2px solid var(--border-light);
  border-top-color: var(--primary);
  border-radius: var(--radius-full);
  animation: spin 1s linear infinite;
}

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

/* 骨架屏 */
.skeleton {
  background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-secondary) 50%, var(--bg-tertiary) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-md);
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ============ 接口信息卡片 ============ */
.api-info-card {
  background-color: var(--bg-primary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  margin-bottom: var(--spacing-lg);
}

.api-info-header {
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.api-info-body {
  padding: var(--spacing-lg);
}

.api-info-row {
  display: flex;
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--border-light);
}

.api-info-row:last-child {
  border-bottom: none;
}

.api-info-label {
  font-weight: 500;
  color: var(--text-secondary);
  min-width: 120px;
  font-size: 0.875rem;
}

.api-info-value {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.api-method {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.75rem;
}

.api-method-get {
  background-color: var(--success-light);
  color: var(--success);
}

.api-method-post {
  background-color: var(--info-light);
  color: var(--info);
}

.api-method-put {
  background-color: var(--warning-light);
  color: var(--warning);
}

.api-method-delete {
  background-color: var(--danger-light);
  color: var(--danger);
}

/* ============ 接口区块（可收缩） ============ */
.api-section {
  background-color: var(--bg-primary);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-light);
  margin-bottom: var(--spacing-lg);
  overflow: hidden;
}

.api-section-header {
  padding: var(--spacing-lg);
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
  transition: background-color var(--transition-fast);
}

.api-section-header:hover {
  background-color: var(--bg-tertiary);
}

.api-section-toggle {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  transition: transform var(--transition-fast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
}

.api-section-toggle.collapsed {
  transform: rotate(-90deg);
}

.api-section-body {
  padding: var(--spacing-lg);
  transition: max-height 0.3s ease-out;
  overflow: hidden;
}

.api-section-body.collapsed {
  display: none;
}

/* ============ 图片上传组件 ============ */
.image-upload-field {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.image-preview-wrap {
  width: 120px;
  height: 120px;
  border: 2px dashed var(--gray-300);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--gray-50);
  flex-shrink: 0;
  position: relative;
}

.image-preview-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-preview-placeholder {
  color: var(--gray-400);
  font-size: 0.75rem;
  text-align: center;
}

.image-upload-actions {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.image-picker-item {
  width: 100%;
  aspect-ratio: 1;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: border-color 0.15s;
  position: relative;
}

.image-picker-item:hover {
  border-color: var(--primary);
}

.image-picker-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-picker-item .picker-delete {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 20px;
  height: 20px;
  background: rgba(239, 68, 68, 0.9);
  color: white;
  border: none;
  border-radius: 50%;
  font-size: 10px;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.image-picker-item:hover .picker-delete {
  display: flex;
}

/* ============ 主题切换按钮 ============ */
.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background-color: var(--bg-secondary);
  color: var(--primary);
}

/* ============ 登录页面 ============ */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - var(--header-height) - 4rem);
  padding: var(--spacing-xl);
}

.login-card {
  width: 100%;
  max-width: 420px;
  overflow: hidden;
}

@media (max-width: 640px) {
  .login-page {
    padding: var(--spacing-md);
    align-items: flex-start;
    padding-top: var(--spacing-2xl);
  }

  .login-header {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  .login-form {
    padding: 0 var(--spacing-md) var(--spacing-lg);
  }
}

.login-header {
  text-align: center;
  padding: var(--spacing-2xl) var(--spacing-xl) var(--spacing-lg);
}

.login-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-light), var(--info-light));
  color: var(--primary);
  margin-bottom: var(--spacing-lg);
}

.login-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.login-subtitle {
  font-size: 0.875rem;
  color: var(--text-tertiary);
}

.login-form {
  padding: 0 var(--spacing-xl) var(--spacing-2xl);
}

/* ============ 实用工具类 ============ */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.text-muted { color: var(--text-tertiary); }

/* ============ Toggle Switch ============ */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 26px;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--gray-300);
  transition: 0.3s;
  border-radius: 26px;
}

.toggle-slider:before {
  position: absolute;
  content: "";
  height: 20px;
  width: 20px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: 0.3s;
  border-radius: 50%;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.toggle-switch input:checked + .toggle-slider {
  background-color: var(--primary);
}

.toggle-switch input:checked + .toggle-slider:before {
  transform: translateX(22px);
}

.toggle-switch input:focus + .toggle-slider {
  box-shadow: 0 0 0 2px var(--primary-light);
}