/* ============================================================
 * components.css — 组件样式
 * 融合 Bootstrap 组件 + Layui 后台风格 + Tailwind 美学
 * 依赖：design-tokens.css, utilities.css, layout.css
 * ============================================================ */

/* ============================================================
 * 1. 按钮（Button）
 * ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 8px 16px;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  font-family: inherit;
  line-height: 1.5;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
  outline: none;
}

.btn:focus-visible {
  box-shadow: 0 0 0 3px rgba(247, 164, 29, 0.3);
}

.btn:disabled,
.btn.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* 主色按钮 */
.btn-primary {
  background-color: var(--color-primary-600);
  color: #ffffff;
  border-color: var(--color-primary-600);
}
.btn-primary:hover {
  background-color: var(--color-primary-700);
  border-color: var(--color-primary-700);
  box-shadow: var(--shadow-sm);
}
.btn-primary:active {
  background-color: var(--color-primary-800);
  border-color: var(--color-primary-800);
}

/* 次要按钮 */
.btn-secondary {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn-secondary:hover {
  background-color: var(--color-gray-200);
  border-color: var(--color-gray-300);
}

/* 成功按钮 */
.btn-success {
  background-color: var(--color-success-600);
  color: #ffffff;
  border-color: var(--color-success-600);
}
.btn-success:hover {
  background-color: var(--color-success-700);
  border-color: var(--color-success-700);
  box-shadow: var(--shadow-sm);
}

/* 警告按钮 */
.btn-warning {
  background-color: var(--color-warning-500);
  color: #ffffff;
  border-color: var(--color-warning-500);
}
.btn-warning:hover {
  background-color: var(--color-warning-600);
  border-color: var(--color-warning-600);
  box-shadow: var(--shadow-sm);
}

/* 危险按钮 */
.btn-danger {
  background-color: var(--color-danger-600);
  color: #ffffff;
  border-color: var(--color-danger-600);
}
.btn-danger:hover {
  background-color: var(--color-danger-700);
  border-color: var(--color-danger-700);
  box-shadow: var(--shadow-sm);
}

/* 幽灵按钮 */
.btn-ghost {
  background-color: transparent;
  color: var(--color-text-secondary);
  border-color: transparent;
}
.btn-ghost:hover {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text);
}

/* 轮廓按钮 */
.btn-outline-primary {
  background-color: transparent;
  color: var(--color-primary-600);
  border-color: var(--color-primary-600);
}
.btn-outline-primary:hover {
  background-color: var(--color-primary-600);
  color: #ffffff;
}

.btn-outline-success {
  background-color: transparent;
  color: var(--color-success-600);
  border-color: var(--color-success-600);
}
.btn-outline-success:hover {
  background-color: var(--color-success-600);
  color: #ffffff;
}

.btn-outline-danger {
  background-color: transparent;
  color: var(--color-danger-600);
  border-color: var(--color-danger-600);
}
.btn-outline-danger:hover {
  background-color: var(--color-danger-600);
  color: #ffffff;
}

/* 按钮尺寸 */
.btn-sm {
  padding: 4px 12px;
  font-size: var(--text-xs);
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 12px 24px;
  font-size: var(--text-base);
  border-radius: var(--radius-md);
}

/* 图标按钮 */
.btn-icon {
  padding: 8px;
  width: 36px;
  height: 36px;
}

.btn-icon.btn-sm {
  width: 28px;
  height: 28px;
  padding: 4px;
}

.btn-icon.btn-lg {
  width: 44px;
  height: 44px;
  padding: 10px;
}

/* 块级按钮 */
.btn-block {
  display: flex;
  width: 100%;
}

/* 按钮组 */
.btn-group {
  display: inline-flex;
}

.btn-group .btn {
  border-radius: 0;
}

.btn-group .btn:first-child {
  border-top-left-radius: var(--radius-sm);
  border-bottom-left-radius: var(--radius-sm);
}

.btn-group .btn:last-child {
  border-top-right-radius: var(--radius-sm);
  border-bottom-right-radius: var(--radius-sm);
}

.btn-group .btn + .btn {
  margin-left: -1px;
}

/* 加载状态 */
.btn-loading {
  position: relative;
  color: transparent !important;
  pointer-events: none;
}

.btn-loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #ffffff;
  border-radius: var(--radius-full);
  animation: btnSpin 0.6s linear infinite;
}

.btn-secondary.btn-loading::after {
  border-color: rgba(0, 0, 0, 0.15);
  border-top-color: var(--color-text-secondary);
}

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

/* ============================================================
 * 2. 表单（Form）
 * ============================================================ */
.form-group {
  margin-bottom: var(--space-4);
}

.form-label {
  display: block;
  margin-bottom: var(--space-1);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text);
}

.form-label .required {
  color: var(--color-danger-500);
  margin-left: 2px;
}

.form-control {
  display: block;
  width: 100%;
  padding: 8px 12px;
  font-size: var(--text-sm);
  font-family: inherit;
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-bg-input, var(--color-bg-secondary));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  outline: none;
  transition: all var(--transition-fast);
}

.form-control:focus {
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px rgba(247, 164, 29, 0.15);
}

.form-control::placeholder {
  color: var(--color-text-muted);
}

.form-control:disabled {
  background-color: var(--color-bg-tertiary);
  opacity: 0.6;
  cursor: not-allowed;
}

/* 表单尺寸 */
.form-control-sm {
  padding: 4px 8px;
  font-size: var(--text-xs);
}

.form-control-lg {
  padding: 12px 16px;
  font-size: var(--text-base);
}

/* 表单状态 */
.form-control.is-valid {
  border-color: var(--color-success-500);
}
.form-control.is-valid:focus {
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.15);
}

.form-control.is-invalid {
  border-color: var(--color-danger-500);
}
.form-control.is-invalid:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}

.form-text {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.form-text.text-danger {
  color: var(--color-danger-500);
}

.form-text.text-success {
  color: var(--color-success-600);
}

/* 下拉选择 */
.form-select {
  display: block;
  width: 100%;
  padding: 8px 36px 8px 12px;
  font-size: var(--text-sm);
  font-family: inherit;
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-bg-input, var(--color-bg-secondary));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  outline: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.form-select:focus {
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px rgba(247, 164, 29, 0.15);
}

/* 文本域 */
.form-textarea {
  display: block;
  width: 100%;
  padding: 8px 12px;
  font-size: var(--text-sm);
  font-family: inherit;
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-bg-input, var(--color-bg-secondary));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  outline: none;
  resize: vertical;
  min-height: 100px;
  transition: all var(--transition-fast);
}

.form-textarea:focus {
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px rgba(247, 164, 29, 0.15);
}

/* 复选框 & 单选框 */
.form-check {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
  cursor: pointer;
  font-size: var(--text-sm);
  color: var(--color-text);
}

.form-check-input {
  width: 18px;
  height: 18px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  appearance: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.form-check-input[type="radio"] {
  border-radius: var(--radius-full);
}

.form-check-input:checked {
  background-color: var(--color-primary-600);
  border-color: var(--color-primary-600);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='white' d='M10.28 2.28L3.989 8.575 1.695 6.28A1 1 0 00.28 7.695l3 3a1 1 0 001.414 0l7-7A1 1 0 0010.28 2.28z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
}

.form-check-input[type="radio"]:checked {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='8' height='8' viewBox='0 0 8 8'%3E%3Ccircle cx='4' cy='4' r='3' fill='white'/%3E%3C/svg%3E");
}

/* 开关 */
.form-switch {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  font-size: var(--text-sm);
}

.form-switch-input {
  position: relative;
  width: 44px;
  height: 24px;
  background-color: var(--color-gray-300);
  border-radius: var(--radius-full);
  border: none;
  appearance: none;
  cursor: pointer;
  transition: background-color var(--transition-fast);
  flex-shrink: 0;
}

.form-switch-input::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background-color: #ffffff;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast);
}

.form-switch-input:checked {
  background-color: var(--color-primary-600);
}

.form-switch-input:checked::after {
  transform: translateX(20px);
}

.form-switch-input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* 表单行 */
.form-row {
  display: flex;
  gap: var(--space-4);
}

.form-row > .form-group {
  flex: 1;
}

/* 内联表单 */
.form-inline {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: var(--space-3);
}

.form-inline .form-group {
  margin-bottom: 0;
}

/* 输入框组 */
.input-group {
  display: flex;
}

.input-group .form-control,
.input-group .form-select {
  border-radius: 0;
  flex: 1;
}

.input-group .form-control:first-child,
.input-group .form-select:first-child {
  border-top-left-radius: var(--radius-sm);
  border-bottom-left-radius: var(--radius-sm);
}

.input-group .form-control:last-child,
.input-group .form-select:last-child {
  border-top-right-radius: var(--radius-sm);
  border-bottom-right-radius: var(--radius-sm);
}

.input-group-prepend,
.input-group-append {
  display: flex;
  align-items: center;
  padding: 0 var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  background-color: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  white-space: nowrap;
}

.input-group-prepend {
  border-right: 0;
  border-top-left-radius: var(--radius-sm);
  border-bottom-left-radius: var(--radius-sm);
}

.input-group-append {
  border-left: 0;
  border-top-right-radius: var(--radius-sm);
  border-bottom-right-radius: var(--radius-sm);
}

/* ============================================================
 * 3. 卡片（Card）
 * ============================================================ */
.card {
  background-color: var(--color-bg-card, var(--color-bg-secondary));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition-fast);
}

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

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
}

.card-header-title {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-text);
}

.card-body {
  padding: var(--space-5);
}

.card-footer {
  display: flex;
  align-items: center;
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-border);
  background-color: var(--color-bg-tertiary);
}

.card-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.card-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
}

.card-text {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.card-img {
  width: 100%;
  height: auto;
  display: block;
}

.card-img-top {
  width: 100%;
  border-bottom: 1px solid var(--color-border);
}

/* ============================================================
 * 4. 表格（Table）
 * ============================================================ */
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.table th,
.table td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}

.table th {
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  background-color: var(--color-bg-tertiary);
  white-space: nowrap;
}

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

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

.table-striped tbody tr:nth-child(even) {
  background-color: var(--color-bg-tertiary);
}

.table-sm th,
.table-sm td {
  padding: var(--space-2) var(--space-3);
}

.table-responsive {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.table td .actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* ============================================================
 * 5. 徽标（Badge）
 * ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  border-radius: var(--radius-full);
  line-height: 1.5;
  white-space: nowrap;
}

.badge-primary {
  background-color: rgba(247, 164, 29, 0.15);
  color: var(--color-primary-400);
}

.badge-success {
  background-color: rgba(34, 197, 94, 0.15);
  color: var(--color-success-500);
}

.badge-warning {
  background-color: rgba(245, 158, 11, 0.15);
  color: var(--color-warning-500);
}

.badge-danger {
  background-color: rgba(239, 68, 68, 0.15);
  color: var(--color-danger-500);
}

.badge-info {
  background-color: rgba(59, 130, 246, 0.15);
  color: var(--color-info-500);
}

.badge-secondary {
  background-color: rgba(136, 136, 136, 0.15);
  color: var(--color-text-secondary);
}

.badge-dot {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.badge-dot::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background-color: currentColor;
}

/* ============================================================
 * 6. 模态框（Modal）
 * ============================================================ */
.modal-backdrop,
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: var(--z-modal-backdrop);
  backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.modal-backdrop.active,
.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.95);
  z-index: var(--z-modal);
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  max-height: 90vh;
  display: flex;
  flex-direction: column;
}

.modal.active {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, -50%) scale(1);
}

.modal-dialog {
  width: 100%;
  max-width: 520px;
}

.modal-sm { max-width: 400px; }
.modal-lg { max-width: 720px; }
.modal-xl { max-width: 960px; }
.modal-full { max-width: calc(100vw - var(--space-8)); max-height: calc(100vh - var(--space-8)); }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.modal-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text);
}

.modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.modal-body {
  padding: var(--space-6);
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border);
  flex-shrink: 0;
}

/* ============================================================
 * 7. 导航（Nav）
 * ============================================================ */
.nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-item {
  list-style: none;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.nav-link:hover {
  color: var(--color-text);
  background-color: var(--color-bg-tertiary);
}

.nav-link.active {
  color: var(--color-primary-600);
  font-weight: var(--font-medium);
}

/* 标签页导航 */
.nav-tabs {
  border-bottom: 2px solid var(--color-border);
  gap: 0;
}

.nav-tabs .nav-link {
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  padding: var(--space-2) var(--space-4);
}

.nav-tabs .nav-link:hover {
  border-bottom-color: var(--color-gray-300);
}

.nav-tabs .nav-link.active {
  color: var(--color-primary-600);
  border-bottom-color: var(--color-primary-600);
  background-color: transparent;
}

/* 胶囊导航 */
.nav-pills .nav-link {
  border-radius: var(--radius-full);
  padding: var(--space-1) var(--space-4);
}

.nav-pills .nav-link.active {
  background-color: var(--color-primary-600);
  color: #ffffff;
}

/* ============================================================
 * 8. 面包屑（Breadcrumb）
 * ============================================================ */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0;
  margin: 0;
  list-style: none;
  font-size: var(--text-sm);
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-muted);
}

.breadcrumb-item a {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.breadcrumb-item a:hover {
  color: var(--color-primary-600);
}

.breadcrumb-item.active {
  color: var(--color-text);
  font-weight: var(--font-medium);
}

.breadcrumb-item + .breadcrumb-item::before {
  content: '/';
  color: var(--color-text-muted);
  margin-right: var(--space-2);
}

/* ============================================================
 * 9. 分页（Pagination）
 * ============================================================ */
.pagination {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
  padding: 0;
  margin: 0;
}

.page-item {
  list-style: none;
}

.page-link {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-bg-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.page-link:hover {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text);
  border-color: var(--color-gray-300);
}

.page-item.active .page-link {
  background-color: var(--color-primary-600);
  color: #ffffff;
  border-color: var(--color-primary-600);
}

.page-item.disabled .page-link {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* ============================================================
 * 10. 警告（Alert）
 * ============================================================ */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
  border: 1px solid transparent;
}

.alert-icon {
  flex-shrink: 0;
  font-size: var(--text-lg);
  line-height: 1;
}

.alert-content {
  flex: 1;
}

.alert-title {
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-1);
}

.alert-close {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: none;
  background: transparent;
  color: inherit;
  opacity: 0.6;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: opacity var(--transition-fast);
}

.alert-close:hover {
  opacity: 1;
}

.alert-success {
  background-color: rgba(34, 197, 94, 0.1);
  color: var(--color-success-500);
  border-color: rgba(34, 197, 94, 0.2);
}

.alert-warning {
  background-color: rgba(245, 158, 11, 0.1);
  color: var(--color-warning-500);
  border-color: rgba(245, 158, 11, 0.2);
}

.alert-danger {
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--color-danger-500);
  border-color: rgba(239, 68, 68, 0.2);
}

.alert-info {
  background-color: rgba(59, 130, 246, 0.1);
  color: var(--color-info-500);
  border-color: rgba(59, 130, 246, 0.2);
}

/* ============================================================
 * 11. 列表组（List Group）
 * ============================================================ */
.list-group {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.list-group-item {
  display: flex;
  align-items: center;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text);
  background-color: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-fast);
  cursor: pointer;
  text-decoration: none;
}

.list-group-item:last-child {
  border-bottom: none;
}

.list-group-item:hover {
  background-color: var(--color-bg-tertiary);
}

.list-group-item.active {
  background-color: rgba(247, 164, 29, 0.1);
  color: var(--color-primary-400);
  font-weight: var(--font-medium);
}

/* ============================================================
 * 12. 下拉菜单（Dropdown）
 * ============================================================ */
.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  min-width: 180px;
  padding: var(--space-1);
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-dropdown);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: all var(--transition-fast);
}

.dropdown-menu.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu.right {
  left: auto;
  right: 0;
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text);
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: left;
  text-decoration: none;
  transition: background-color var(--transition-fast);
}

.dropdown-item:hover {
  background-color: var(--color-bg-tertiary);
}

.dropdown-item.active {
  background-color: rgba(247, 164, 29, 0.1);
  color: var(--color-primary-400);
}

.dropdown-item.danger {
  color: var(--color-danger-600);
}

.dropdown-item.danger:hover {
  background-color: rgba(239, 68, 68, 0.1);
}

.dropdown-divider {
  height: 1px;
  background-color: var(--color-border);
  margin: var(--space-1) 0;
}

.dropdown-header {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--color-text-muted);
  text-transform: uppercase;
}

/* ============================================================
 * 13. 工具提示（Tooltip）
 * ============================================================ */
.tooltip {
  position: absolute;
  z-index: var(--z-tooltip);
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
  color: #ffffff;
  background-color: var(--color-gray-900);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.tooltip.show {
  opacity: 1;
}

.tooltip::after {
  content: '';
  position: absolute;
}

.tooltip.top::after {
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%);
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 5px solid var(--color-gray-900);
}

.tooltip.bottom::after {
  top: -4px;
  left: 50%;
  transform: translateX(-50%);
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-bottom: 5px solid var(--color-gray-900);
}

/* ============================================================
 * 14. Toast 通知
 * ============================================================ */
.toast-container {
  position: fixed;
  top: var(--space-4);
  right: var(--space-4);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  min-width: 320px;
  max-width: 420px;
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  pointer-events: auto;
  animation: toastSlideIn 0.3s ease-out;
}

.toast.hiding {
  animation: toastSlideOut 0.25s ease-in forwards;
}

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

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

.toast-icon {
  flex-shrink: 0;
  font-size: var(--text-lg);
}

.toast-content {
  flex: 1;
}

.toast-title {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text);
  margin-bottom: 2px;
}

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

.toast-close {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  border-radius: var(--radius-sm);
}

.toast-close:hover {
  color: var(--color-text);
}

.toast.toast-success { border-left: 3px solid var(--color-success-500); }
.toast.toast-warning { border-left: 3px solid var(--color-warning-500); }
.toast.toast-danger  { border-left: 3px solid var(--color-danger-500); }
.toast.toast-info    { border-left: 3px solid var(--color-info-500); }

/* ============================================================
 * 15. 进度条（Progress）
 * ============================================================ */
.progress {
  width: 100%;
  height: 8px;
  background-color: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background-color: var(--color-primary-600);
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}

.progress-bar.success { background-color: var(--color-success-500); }
.progress-bar.warning { background-color: var(--color-warning-500); }
.progress-bar.danger  { background-color: var(--color-danger-500); }
.progress-bar.info    { background-color: var(--color-info-500); }

.progress.progress-sm { height: 4px; }
.progress.progress-lg { height: 12px; }

/* 条纹进度条 */
.progress-bar-striped {
  background-image: linear-gradient(
    45deg,
    rgba(255, 255, 255, 0.15) 25%,
    transparent 25%,
    transparent 50%,
    rgba(255, 255, 255, 0.15) 50%,
    rgba(255, 255, 255, 0.15) 75%,
    transparent 75%,
    transparent
  );
  background-size: 1rem 1rem;
}

.progress-bar-striped.animated {
  animation: progressStripes 1s linear infinite;
}

@keyframes progressStripes {
  from { background-position: 1rem 0; }
  to   { background-position: 0 0; }
}

/* ============================================================
 * 16. 标签（Tag）
 * ============================================================ */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 10px;
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  white-space: nowrap;
}

.tag-primary {
  background-color: var(--color-primary-50);
  color: var(--color-primary-700);
  border-color: var(--color-primary-200);
}

.tag-success {
  background-color: var(--color-success-50);
  color: var(--color-success-700);
  border-color: var(--color-success-200);
}

.tag-warning {
  background-color: var(--color-warning-50);
  color: var(--color-warning-700);
  border-color: var(--color-warning-200);
}

.tag-danger {
  background-color: var(--color-danger-50);
  color: var(--color-danger-700);
  border-color: var(--color-danger-200);
}

.tag-info {
  background-color: var(--color-info-50);
  color: var(--color-info-700);
  border-color: var(--color-info-200);
}

.tag .tag-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  height: 14px;
  border: none;
  background: transparent;
  color: inherit;
  opacity: 0.6;
  cursor: pointer;
  border-radius: var(--radius-sm);
  font-size: 10px;
  padding: 0;
}

.tag .tag-close:hover {
  opacity: 1;
}

/* ============================================================
 * 17. 头像（Avatar）
 * ============================================================ */
.avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-primary-400), var(--color-primary-600));
  color: #ffffff;
  font-weight: var(--font-semibold);
  font-size: var(--text-sm);
  overflow: hidden;
  flex-shrink: 0;
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.avatar-sm { width: 28px; height: 28px; font-size: var(--text-xs); }
.avatar-lg { width: 56px; height: 56px; font-size: var(--text-xl); }
.avatar-xl { width: 72px; height: 72px; font-size: var(--text-2xl); }

.avatar-group {
  display: flex;
}

.avatar-group .avatar {
  border: 2px solid var(--color-bg-secondary);
  margin-left: -8px;
}

.avatar-group .avatar:first-child {
  margin-left: 0;
}

/* 在线状态指示 */
.avatar-status {
  position: relative;
}

.avatar-status::after {
  content: '';
  position: absolute;
  bottom: 1px;
  right: 1px;
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  border: 2px solid var(--color-bg-secondary);
}

.avatar-status.online::after  { background-color: var(--color-success-500); }
.avatar-status.offline::after { background-color: var(--color-gray-400); }
.avatar-status.busy::after    { background-color: var(--color-danger-500); }

/* ============================================================
 * 18. 统计卡片（Stat Card）
 * ============================================================ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4, 16px);
}
@media (max-width: 1024px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .stats-grid { grid-template-columns: 1fr; }
}
.stat-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-5);
  background-color: var(--color-bg-card, var(--color-bg-secondary));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}

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

.stat-card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  font-size: var(--text-xl);
  flex-shrink: 0;
}

.stat-card-icon.primary {
  background-color: rgba(247, 164, 29, 0.15);
  color: var(--color-primary-400);
}

.stat-card-icon.success {
  background-color: rgba(34, 197, 94, 0.15);
  color: var(--color-success-500);
}

.stat-card-icon.warning {
  background-color: rgba(245, 158, 11, 0.15);
  color: var(--color-warning-500);
}

.stat-card-icon.danger {
  background-color: rgba(239, 68, 68, 0.15);
  color: var(--color-danger-500);
}

.stat-card-icon.info {
  background-color: rgba(59, 130, 246, 0.15);
  color: var(--color-info-500);
}

.stat-card-content {
  flex: 1;
  min-width: 0;
}

.stat-card-label {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-1);
}

.stat-card-value {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-text);
  line-height: 1;
  margin-bottom: var(--space-1);
}

.stat-card-change {
  font-size: var(--text-xs);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.stat-card-change.up {
  color: var(--color-success-600);
}

.stat-card-change.down {
  color: var(--color-danger-600);
}

/* ============================================================
 * 19. 空状态（Empty State）
 * ============================================================ */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-16) var(--space-8);
  text-align: center;
}

.empty-state-icon {
  font-size: 64px;
  margin-bottom: var(--space-4);
  opacity: 0.4;
}

.empty-state-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.empty-state-desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  max-width: 360px;
  margin-bottom: var(--space-6);
}

.empty-state-action {
  display: flex;
  gap: var(--space-3);
}

/* ============================================================
 * 20. 搜索框（Search Input）
 * ============================================================ */
.search-input {
  position: relative;
}

.search-input-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  pointer-events: none;
}

.search-input .form-control {
  padding-left: 40px;
  border-radius: var(--radius-full);
}

.search-input-clear {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  border-radius: var(--radius-full);
}

.search-input-clear:hover {
  color: var(--color-text);
  background-color: var(--color-bg-tertiary);
}

/* ============================================================
 * 21. 筛选器（Filter Bar）
 * ============================================================ */
.filter-bar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background-color: var(--color-bg-tertiary);
  border-radius: var(--radius-md);
  flex-wrap: wrap;
}

.filter-item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-item:hover {
  border-color: var(--color-primary-300);
  color: var(--color-primary-600);
}

.filter-item.active {
  background-color: var(--color-primary-600);
  color: #ffffff;
  border-color: var(--color-primary-600);
}

.filter-item .filter-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  border: none;
  background: transparent;
  color: inherit;
  opacity: 0.7;
  cursor: pointer;
  font-size: 10px;
  padding: 0;
}

/* ============================================================
 * 22. 评论（Comment）
 * ============================================================ */
.comment-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.comment-item {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-border);
}

.comment-item:last-child {
  border-bottom: none;
}

.comment-avatar {
  flex-shrink: 0;
}

.comment-body {
  flex: 1;
  min-width: 0;
}

.comment-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-1);
}

.comment-author {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text);
}

.comment-time {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.comment-text {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-2);
}

.comment-actions {
  display: flex;
  gap: var(--space-3);
}

.comment-action-btn {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  transition: color var(--transition-fast);
}

.comment-action-btn:hover {
  color: var(--color-primary-600);
}

.comment-form {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
}

.comment-form .form-textarea {
  min-height: 80px;
}

/* ============================================================
 * 23. 媒体网格（Media Grid）
 * ============================================================ */
.media-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: var(--space-4);
}

.media-item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: var(--color-bg-tertiary);
  aspect-ratio: 1;
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

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

.media-item-overlay {
  position: absolute;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.media-item:hover .media-item-overlay {
  opacity: 1;
}

.media-item-overlay .btn-icon {
  width: 32px;
  height: 32px;
  background-color: rgba(255, 255, 255, 0.9);
  color: var(--color-gray-800);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

/* ============================================================
 * 24. 上传区（Upload Zone）
 * ============================================================ */
.upload-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-10);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg-tertiary);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
}

.upload-zone:hover {
  border-color: var(--color-primary-400);
  background-color: rgba(247, 164, 29, 0.05);
}

.upload-zone.dragging {
  border-color: var(--color-primary-500);
  background-color: rgba(247, 164, 29, 0.05);
  box-shadow: 0 0 0 4px rgba(247, 164, 29, 0.1);
}

.upload-zone-icon {
  font-size: 40px;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.upload-zone-text {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-1);
}

.upload-zone-hint {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* ============================================================
 * 25. 用户卡片（User Card）
 * ============================================================ */
.user-card {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: pointer;
  text-decoration: none;
}

.user-card:hover {
  box-shadow: var(--shadow-sm);
  border-color: var(--color-primary-300);
}

.user-card-info {
  flex: 1;
  min-width: 0;
}

.user-card-name {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-card-email {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ============================================================
 * 26. 插件卡片（Plugin Card）
 * ============================================================ */
.plugin-card {
  padding: var(--space-5);
  background-color: var(--color-bg-card, var(--color-bg-secondary));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}

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

.plugin-card-header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.plugin-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xl);
  background-color: var(--color-bg-tertiary);
  flex-shrink: 0;
}

.plugin-card-name {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-text);
  margin-bottom: 2px;
}

.plugin-card-version {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.plugin-card-desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-4);
}

.plugin-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* 插件开关 */
.plugin-toggle {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

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

.plugin-toggle-slider {
  position: absolute;
  inset: 0;
  background-color: var(--color-gray-300);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.plugin-toggle-slider::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background-color: #ffffff;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast);
}

.plugin-toggle input:checked + .plugin-toggle-slider {
  background-color: var(--color-primary-600);
}

.plugin-toggle input:checked + .plugin-toggle-slider::after {
  transform: translateX(20px);
}

/* ============================================================
 * 27. 邮件模板编辑器（Template Editor）
 * ============================================================ */
.template-editor {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-bg-secondary);
}

.template-editor-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-bg-tertiary);
}

.template-editor-body {
  display: flex;
  flex: 1;
  min-height: 400px;
}

.template-editor-code {
  flex: 1;
  padding: var(--space-4);
  border-right: 1px solid var(--color-border);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  resize: none;
  border: none;
  outline: none;
  background-color: transparent;
  color: var(--color-text);
}

.template-editor-preview {
  flex: 1;
  padding: var(--space-4);
  overflow-y: auto;
  background-color: var(--color-bg-tertiary);
}

.template-editor-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  border-top: 1px solid var(--color-border);
  background-color: var(--color-bg-tertiary);
}

/* ============================================================
 * 28. 加载指示器（Spinner / Skeleton）
 * ============================================================ */
.spinner {
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary-600);
  border-radius: var(--radius-full);
  animation: spinnerRotate 0.7s linear infinite;
}

.spinner-sm { width: 16px; height: 16px; border-width: 2px; }
.spinner-lg { width: 40px; height: 40px; border-width: 4px; }

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

/* 骨架屏 */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-bg-tertiary) 25%,
    var(--color-bg-hover) 50%,
    var(--color-bg-tertiary) 75%
  );
  background-size: 200% 100%;
  animation: skeletonShimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

.skeleton-text {
  height: 14px;
  margin-bottom: var(--space-2);
}

.skeleton-title {
  height: 20px;
  width: 60%;
  margin-bottom: var(--space-3);
}

.skeleton-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
}

.skeleton-image {
  width: 100%;
  aspect-ratio: 16/9;
}

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

/* ============================================================
 * 29. 抽屉（Drawer / Offcanvas）
 * ============================================================ */
.drawer-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: var(--z-offcanvas);
  backdrop-filter: blur(2px);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.drawer-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.drawer {
  position: fixed;
  top: 0;
  bottom: 0;
  width: 400px;
  max-width: 90vw;
  background-color: var(--color-bg-secondary);
  box-shadow: var(--shadow-xl);
  z-index: var(--z-offcanvas);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-base);
}

.drawer-left {
  left: 0;
  transform: translateX(-100%);
}

.drawer-right {
  right: 0;
  transform: translateX(100%);
}

.drawer.active {
  transform: translateX(0);
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.drawer-body {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-5);
}

.drawer-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-border);
  flex-shrink: 0;
}

/* ============================================================
 * 30. 步骤条（Steps）
 * ============================================================ */
.steps {
  display: flex;
  align-items: center;
  width: 100%;
}

.step {
  display: flex;
  align-items: center;
  flex: 1;
  position: relative;
}

.step:not(:last-child)::after {
  content: '';
  flex: 1;
  height: 2px;
  background-color: var(--color-border);
  margin: 0 var(--space-3);
}

.step.active:not(:last-child)::after {
  background-color: var(--color-primary-500);
}

.step.done:not(:last-child)::after {
  background-color: var(--color-primary-500);
}

.step-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background-color: var(--color-bg-tertiary);
  border: 2px solid var(--color-border);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text-muted);
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.step.active .step-indicator {
  background-color: var(--color-primary-600);
  border-color: var(--color-primary-600);
  color: #ffffff;
}

.step.done .step-indicator {
  background-color: var(--color-primary-600);
  border-color: var(--color-primary-600);
  color: #ffffff;
}

.step-title {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-left: var(--space-2);
  white-space: nowrap;
}

.step.active .step-title {
  color: var(--color-text);
  font-weight: var(--font-medium);
}

.step.done .step-title {
  color: var(--color-primary-600);
}