/* ==================== 基础变量 ==================== */
:root {
  /* 主色调 - 薰衣草紫 & 云白 */
  --lavender-light: #e6e6fa;
  --lavender: #d8bfd8;
  --lavender-dark: #9370db;
  --lavender-deep: #7b68ee;
  --cloud-white: #f5f5f5;
  --cloud-light: #fafafa;
  --pure-white: #ffffff;

  /* 辅助色 */
  --pink-soft: #ffb6c1;
  --pink-deep: #ff69b4;
  --text-dark: #333333;
  --text-muted: #666666;
  --text-light: #999999;

  /* 阴影 */
  --shadow-soft: 0 4px 15px rgba(147, 112, 219, 0.15);
  --shadow-hover: 0 8px 30px rgba(147, 112, 219, 0.25);
  --shadow-card: 0 2px 10px rgba(0, 0, 0, 0.08);

  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  /* 过渡 */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* ==================== 重置样式 ==================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  background: linear-gradient(135deg, var(--cloud-white) 0%, var(--lavender-light) 100%);
  min-height: 100vh;
  color: var(--text-dark);
  overflow-x: hidden;
}

/* ==================== 导航栏 ==================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 70px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(147, 112, 219, 0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 30px;
  z-index: 1000;
  box-shadow: var(--shadow-soft);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-icon {
  font-size: 28px;
  animation: float 3s ease-in-out infinite;
}

.brand-text {
  font-size: 22px;
  font-weight: 700;
  color: var(--lavender-dark);
  letter-spacing: 2px;
}

.brand-sub {
  font-size: 12px;
  color: var(--pink-deep);
  background: linear-gradient(135deg, var(--pink-soft), var(--lavender));
  padding: 2px 10px;
  border-radius: var(--radius-full);
}

.nav-search {
  display: flex;
  align-items: center;
  background: var(--cloud-white);
  border-radius: var(--radius-full);
  padding: 5px 5px 5px 20px;
  box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.05);
  border: 1px solid rgba(147, 112, 219, 0.2);
  transition: var(--transition-normal);
}

.nav-search:focus-within {
  border-color: var(--lavender-dark);
  box-shadow: 0 0 0 3px rgba(147, 112, 219, 0.1);
}

.search-input {
  border: none;
  background: transparent;
  width: 250px;
  padding: 8px 0;
  font-size: 14px;
  outline: none;
  color: var(--text-dark);
}

.search-input::placeholder {
  color: var(--text-light);
}

.search-btn {
  background: linear-gradient(135deg, var(--lavender-dark), var(--lavender-deep));
  border: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  transition: var(--transition-fast);
  color: white;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.search-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 4px 15px rgba(147, 112, 219, 0.4);
}

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

.btn-login {
  display: flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, #5865f2, #7289da);
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: var(--radius-full);
  cursor: pointer;
  font-weight: 500;
  transition: var(--transition-normal);
}

.btn-login:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 20px rgba(88, 101, 242, 0.4);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 5px 15px 5px 5px;
  background: var(--cloud-white);
  border-radius: var(--radius-full);
  cursor: pointer;
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 2px solid var(--lavender);
}

.user-name {
  font-weight: 500;
  color: var(--text-dark);
}

.admin-badge {
  background: linear-gradient(135deg, var(--pink-deep), var(--lavender-dark));
  color: white;
  font-size: 10px;
  padding: 2px 6px;
  border-radius: var(--radius-full);
  margin-left: 5px;
}

/* ==================== 筛选栏 ==================== */
.filter-bar {
  margin-top: 70px;
  padding: 20px 30px;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(147, 112, 219, 0.1);
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: center;
}

.filter-selects {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.filter-group label {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
}

.filter-group select {
  padding: 8px 30px 8px 12px;
  border: 1px solid rgba(147, 112, 219, 0.3);
  border-radius: var(--radius-sm);
  background: white;
  color: var(--text-dark);
  font-size: 14px;
  cursor: pointer;
  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='%239370DB' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  transition: var(--transition-fast);
}

.filter-group select:hover {
  border-color: var(--lavender-dark);
}

.filter-group select:focus {
  border-color: var(--lavender-dark);
  box-shadow: 0 0 0 3px rgba(147, 112, 219, 0.1);
}

.filter-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  flex: 1;
  margin-left: 20px;
}

.filter-tag {
  padding: 6px 14px;
  background: var(--cloud-white);
  border: 1px solid rgba(147, 112, 219, 0.2);
  border-radius: var(--radius-full);
  font-size: 13px;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition-fast);
}

.filter-tag:hover {
  background: var(--lavender-light);
  color: var(--lavender-dark);
}

.filter-tag.active {
  background: linear-gradient(135deg, var(--lavender-dark), var(--lavender-deep));
  color: white;
  border-color: transparent;
}

/* ==================== 主内容区 ==================== */
.main-content {
  padding: 30px;
  min-height: calc(100vh - 150px);
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 25px;
  max-width: 1600px;
  margin: 0 auto;
}

/* ==================== 卡片样式 ==================== */
.card {
  background: var(--pure-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: var(--transition-normal);
  cursor: pointer;
  position: relative;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}

.card-header {
  padding: 15px 18px;
  background: linear-gradient(135deg, rgba(230, 230, 250, 0.5), rgba(255, 255, 255, 0.8));
}

.card-author {
  font-size: 14px;
  color: var(--pink-deep);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 5px;
}

.card-author::before {
  content: '作者:';
  color: var(--text-muted);
  font-weight: 400;
}

.card-desc-preview {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 5px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-cover {
  position: relative;
  width: 100%;
  padding-top: 100%; /* 1:1 比例 */
  background: var(--cloud-light);
  overflow: hidden;
}

.card-cover img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-slow);
}

.card:hover .card-cover img {
  transform: scale(1.05);
}

.card-footer {
  padding: 15px 18px;
}

.card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
}

.card-meta-tag {
  font-size: 11px;
  padding: 3px 8px;
  background: var(--lavender-light);
  color: var(--lavender-dark);
  border-radius: var(--radius-sm);
}

.card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.card-tag {
  font-size: 12px;
  padding: 4px 10px;
  background: var(--cloud-white);
  border: 1px solid rgba(147, 112, 219, 0.2);
  border-radius: var(--radius-full);
  color: var(--text-muted);
  transition: var(--transition-fast);
}

.card-tag:hover {
  background: var(--lavender-light);
  color: var(--lavender-dark);
}

/* 无权限卡片 */
.card.no-permission {
  opacity: 0.7;
}

.card.no-permission .card-cover {
  filter: blur(8px);
}

.card.no-permission .card-cover::after {
  content: '🔒';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 48px;
  z-index: 10;
}

/* ==================== 分页 ==================== */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  margin-top: 40px;
  padding: 20px;
}

.page-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(147, 112, 219, 0.3);
  border-radius: var(--radius-sm);
  background: white;
  color: var(--text-dark);
  cursor: pointer;
  transition: var(--transition-fast);
}

.page-btn:hover:not(.active):not(:disabled) {
  background: var(--lavender-light);
  border-color: var(--lavender-dark);
}

.page-btn.active {
  background: linear-gradient(135deg, var(--lavender-dark), var(--lavender-deep));
  color: white;
  border-color: transparent;
}

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

/* ==================== 右键菜单 ==================== */
.context-menu {
  position: fixed;
  background: white;
  border-radius: var(--radius-md);
  box-shadow: 0 5px 25px rgba(0, 0, 0, 0.15);
  padding: 8px 0;
  min-width: 180px;
  z-index: 2000;
  display: none;
  animation: fadeIn 0.15s ease;
}

.menu-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  cursor: pointer;
  transition: var(--transition-fast);
  font-size: 14px;
}

.menu-item:hover {
  background: var(--lavender-light);
  color: var(--lavender-dark);
}

.menu-divider {
  height: 1px;
  background: rgba(147, 112, 219, 0.1);
  margin: 5px 0;
}

/* ==================== 弹窗 ==================== */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 3000;
  animation: fadeIn 0.2s ease;
}

.modal.show {
  display: flex;
}

.modal-content {
  background: white;
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 500px;
  box-shadow: 0 10px 50px rgba(0, 0, 0, 0.2);
  animation: slideUp 0.3s ease;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 25px;
  border-bottom: 1px solid rgba(147, 112, 219, 0.1);
}

.modal-header h3 {
  color: var(--lavender-dark);
  font-size: 18px;
}

.modal-close {
  width: 32px;
  height: 32px;
  border: none;
  background: var(--cloud-white);
  border-radius: 50%;
  cursor: pointer;
  font-size: 18px;
  color: var(--text-muted);
  transition: var(--transition-fast);
}

.modal-close:hover {
  background: var(--lavender-light);
  color: var(--lavender-dark);
}

.modal-body {
  padding: 25px;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding: 15px 25px;
  border-top: 1px solid rgba(147, 112, 219, 0.1);
}

/* ==================== 表单样式 ==================== */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid rgba(147, 112, 219, 0.3);
  border-radius: var(--radius-sm);
  font-size: 14px;
  outline: none;
  transition: var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--lavender-dark);
  box-shadow: 0 0 0 3px rgba(147, 112, 219, 0.1);
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
}

.form-hint {
  display: block;
  font-size: 12px;
  color: var(--text-light);
  margin-top: 6px;
}

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

.input-group input {
  flex: 1;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 20px;
}

/* ==================== 按钮 ==================== */
.btn-primary {
  padding: 12px 24px;
  background: linear-gradient(135deg, var(--lavender-dark), var(--lavender-deep));
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 500;
  transition: var(--transition-normal);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 20px rgba(147, 112, 219, 0.4);
}

.btn-secondary {
  padding: 12px 24px;
  background: var(--cloud-white);
  color: var(--text-muted);
  border: 1px solid rgba(147, 112, 219, 0.3);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 500;
  transition: var(--transition-fast);
}

.btn-secondary:hover {
  background: var(--lavender-light);
  color: var(--lavender-dark);
}

.btn-fetch {
  padding: 12px 20px;
  background: linear-gradient(135deg, #5865f2, #7289da);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 500;
  white-space: nowrap;
  transition: var(--transition-normal);
}

.btn-fetch:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 20px rgba(88, 101, 242, 0.4);
}

/* ==================== 管理员面板 ==================== */
.admin-fab {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--lavender-dark), var(--lavender-deep));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 5px 25px rgba(147, 112, 219, 0.4);
  z-index: 1000;
  font-size: 24px;
  transition: var(--transition-normal);
  line-height: 1;
}

.admin-fab span {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  line-height: 1;
}

.admin-fab:hover {
  transform: scale(1.1) rotate(90deg);
}

.admin-panel {
  position: fixed;
  top: 0;
  right: -500px;
  width: 500px;
  height: 100vh;
  background: white;
  box-shadow: -5px 0 30px rgba(0, 0, 0, 0.1);
  z-index: 2000;
  transition: right 0.3s ease;
  overflow-y: auto;
}

.admin-panel.show {
  right: 0;
}

.admin-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 25px;
  border-bottom: 1px solid rgba(147, 112, 219, 0.1);
  background: linear-gradient(135deg, var(--lavender-light), white);
}

.admin-header h2 {
  color: var(--lavender-dark);
}

.admin-close {
  width: 36px;
  height: 36px;
  border: none;
  background: white;
  border-radius: 50%;
  cursor: pointer;
  font-size: 20px;
  color: var(--text-muted);
  box-shadow: var(--shadow-soft);
  transition: var(--transition-fast);
}

.admin-close:hover {
  color: var(--lavender-dark);
}

.admin-tabs {
  display: flex;
  border-bottom: 1px solid rgba(147, 112, 219, 0.1);
}

.admin-tab {
  flex: 1;
  padding: 15px;
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition-fast);
  position: relative;
}

.admin-tab:hover {
  color: var(--lavender-dark);
}

.admin-tab.active {
  color: var(--lavender-dark);
}

.admin-tab.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--lavender-dark), var(--lavender-deep));
  border-radius: 3px 3px 0 0;
}

.admin-content {
  padding: 25px;
}

/* 标签输入 */
.tags-input {
  border: 1px solid rgba(147, 112, 219, 0.3);
  border-radius: var(--radius-sm);
  padding: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  min-height: 50px;
}

.tags-input:focus-within {
  border-color: var(--lavender-dark);
  box-shadow: 0 0 0 3px rgba(147, 112, 219, 0.1);
}

.selected-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.selected-tag {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  background: linear-gradient(135deg, var(--lavender-light), var(--lavender));
  border-radius: var(--radius-full);
  font-size: 12px;
  color: var(--lavender-dark);
}

.selected-tag .remove-tag {
  cursor: pointer;
  opacity: 0.7;
}

.selected-tag .remove-tag:hover {
  opacity: 1;
}

.tags-input input {
  border: none;
  outline: none;
  flex: 1;
  min-width: 100px;
  padding: 5px;
  font-size: 13px;
}

.preset-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.preset-tag {
  padding: 4px 10px;
  background: var(--cloud-white);
  border: 1px solid rgba(147, 112, 219, 0.2);
  border-radius: var(--radius-full);
  font-size: 12px;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition-fast);
}

.preset-tag:hover {
  background: var(--lavender-light);
  color: var(--lavender-dark);
}

/* 封面预览 */
.cover-preview {
  margin-top: 10px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  max-width: 200px;
}

.cover-preview img {
  width: 100%;
  display: block;
}

/* 备份列表和报告列表 */
.backup-list,
.reports-list {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.backup-item,
.report-item {
  background: var(--cloud-white);
  border-radius: var(--radius-md);
  padding: 15px;
  border: 1px solid rgba(147, 112, 219, 0.1);
}

.backup-item-header,
.report-item-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  margin-bottom: 10px;
}

.backup-item-title,
.report-item-title {
  font-weight: 500;
  color: var(--text-dark);
}

.backup-item-reason,
.report-item-type {
  font-size: 12px;
  padding: 2px 8px;
  background: var(--lavender-light);
  color: var(--lavender-dark);
  border-radius: var(--radius-full);
}

.backup-item-actions,
.report-item-actions {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

.btn-small {
  padding: 6px 12px;
  font-size: 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-restore {
  background: linear-gradient(135deg, #4caf50, #66bb6a);
  color: white;
  border: none;
}

.btn-delete {
  background: #ff5252;
  color: white;
  border: none;
}

.btn-resolve {
  background: linear-gradient(135deg, var(--lavender-dark), var(--lavender-deep));
  color: white;
  border: none;
}

/* ==================== Toast 提示 ==================== */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: rgba(0, 0, 0, 0.8);
  color: white;
  padding: 12px 25px;
  border-radius: var(--radius-full);
  font-size: 14px;
  z-index: 5000;
  opacity: 0;
  transition: all 0.3s ease;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.toast.success {
  background: linear-gradient(135deg, #4caf50, #66bb6a);
}

.toast.error {
  background: linear-gradient(135deg, #ff5252, #ff1744);
}

.toast.info {
  background: linear-gradient(135deg, var(--lavender-dark), var(--lavender-deep));
}

/* ==================== 管理员卡片操作按钮 ==================== */
.card-admin-actions {
  position: absolute;
  top: 8px;
  right: 8px;
  display: flex;
  gap: 3px;
  z-index: 10;
  opacity: 0;
  transition: opacity 0.3s ease;
  background: rgba(255, 255, 255, 0.95);
  padding: 5px 8px;
  border-radius: 20px;
  box-shadow: 0 2px 12px rgba(147, 112, 219, 0.2);
  backdrop-filter: blur(8px);
}

.card:hover .card-admin-actions {
  opacity: 1;
}

.admin-btn {
  width: 26px;
  height: 26px;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  background: transparent;
  color: var(--text-muted);
}

.admin-btn:hover {
  transform: scale(1.15);
}

.admin-btn.edit {
  color: var(--lavender-dark);
}

.admin-btn.edit:hover {
  background: var(--lavender-light);
  color: var(--lavender-deep);
}

.admin-btn.backup {
  color: #ffb74d;
}

.admin-btn.backup:hover {
  background: #fff8e1;
  color: #f57c00;
}

.admin-btn.delete {
  color: #ef9a9a;
}

.admin-btn.delete:hover {
  background: #ffebee;
  color: #e53935;
}

/* 备份原因菜单 */
.backup-menu {
  background: white;
  border-radius: var(--radius-md);
  box-shadow: 0 5px 25px rgba(0, 0, 0, 0.2);
  overflow: hidden;
  z-index: 1000;
  min-width: 150px;
}

.backup-menu-title {
  padding: 10px 15px;
  font-size: 12px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--lavender-light);
  background: var(--cloud-light);
}

.backup-menu-item {
  padding: 10px 15px;
  cursor: pointer;
  transition: background 0.2s;
  font-size: 14px;
}

.backup-menu-item:hover {
  background: var(--lavender-light);
}

/* ==================== 视图切换按钮 ==================== */
.view-toggle {
  display: flex;
  gap: 5px;
  margin-left: auto;
  padding: 3px;
  background: rgba(255, 255, 255, 0.5);
  border-radius: var(--radius-md);
}

.view-btn {
  width: 36px;
  height: 36px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.view-btn:hover {
  background: var(--lavender-light);
}

.view-btn.active {
  background: var(--lavender);
  color: white;
  box-shadow: 0 2px 8px rgba(147, 112, 219, 0.3);
}

/* ==================== 树状视图 ==================== */
.tree-view {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-lg);
  padding: 25px;
  min-height: 400px;
  box-shadow: var(--shadow-md);
}

.tree-category {
  margin-bottom: 15px;
}

.tree-category-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 15px;
  background: linear-gradient(135deg, var(--lavender-light), rgba(255, 255, 255, 0.8));
  border-radius: var(--radius-md);
  cursor: pointer;
  user-select: none;
  transition: all 0.2s;
  font-weight: 600;
  color: var(--lavender-dark);
}

.tree-category-header:hover {
  background: linear-gradient(135deg, var(--lavender), var(--lavender-light));
  color: white;
}

.tree-category-header .toggle-icon {
  transition: transform 0.2s;
  font-size: 12px;
}

.tree-category-header.collapsed .toggle-icon {
  transform: rotate(-90deg);
}

.tree-category-count {
  margin-left: auto;
  font-size: 12px;
  padding: 2px 8px;
  background: rgba(255, 255, 255, 0.5);
  border-radius: 10px;
  color: var(--text-muted);
}

.tree-subcategory {
  margin-left: 20px;
  margin-top: 8px;
  padding-left: 15px;
  border-left: 2px solid var(--lavender-light);
}

.tree-subcategory-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: background 0.2s;
  color: var(--text-secondary);
  font-weight: 500;
}

.tree-subcategory-header:hover {
  background: var(--lavender-light);
}

.tree-subcategory-header.collapsed .toggle-icon {
  transform: rotate(-90deg);
}

.tree-items {
  margin-left: 20px;
  padding-left: 15px;
  border-left: 2px dashed var(--lavender-light);
}

.tree-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  margin: 4px 0;
  border-radius: var(--radius-sm);
  transition: all 0.2s;
  cursor: pointer;
}

.tree-item:hover {
  background: var(--lavender-light);
  transform: translateX(5px);
}

.tree-item-icon {
  font-size: 14px;
}

.tree-item-link {
  color: var(--lavender-dark);
  text-decoration: none;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tree-item-link:hover {
  text-decoration: underline;
}

.tree-item-author {
  font-size: 12px;
  color: var(--text-muted);
}

.tree-item-tags {
  display: flex;
  gap: 4px;
}

.tree-item-tag {
  font-size: 10px;
  padding: 2px 6px;
  background: var(--cloud-light);
  border-radius: 8px;
  color: var(--text-muted);
}

.tree-empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.tree-empty-icon {
  font-size: 48px;
  margin-bottom: 15px;
}

/* 树状视图中的无权限项 */
.tree-item.no-permission {
  opacity: 0.5;
}

.tree-item.no-permission .tree-item-link {
  color: var(--text-muted);
  pointer-events: none;
}

.tree-item.no-permission::after {
  content: '🔒';
  font-size: 12px;
}

/* ==================== 动画 ==================== */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-5px);
  }
}

/* ==================== 响应式 ==================== */

/* 移动端搜索栏 */
.mobile-search {
  display: none;
  padding: 12px 15px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(147, 112, 219, 0.15);
  margin-top: 60px;
  position: relative;
  z-index: 100;
}

.mobile-search .nav-search {
  display: flex;
  width: 100%;
  padding: 5px 5px 5px 15px;
  background: var(--cloud-white);
  border-radius: var(--radius-full);
  border: 1px solid rgba(147, 112, 219, 0.2);
}

.mobile-search .search-input {
  width: 100%;
  flex: 1;
  font-size: 14px;
}

@media (max-width: 768px) {
  .navbar {
    padding: 0 15px;
    height: 60px;
  }

  .brand-text {
    font-size: 16px;
    letter-spacing: 1px;
  }

  .brand-sub {
    display: none;
  }

  /* 隐藏导航栏中的搜索框 */
  .navbar .nav-search {
    display: none;
  }

  /* 显示移动端搜索栏 */
  .mobile-search {
    display: block;
  }

  /* 筛选栏优化 */
  .filter-bar {
    margin-top: 0 !important;
    padding: 15px;
    gap: 12px;
    flex-direction: column;
    align-items: stretch;
  }

  /* 筛选下拉框横向排列 */
  .filter-selects {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    width: 100%;
  }

  .filter-group {
    width: 100%;
  }

  .filter-group select {
    width: 100%;
  }

  /* 标签区域优化 */
  .filter-tags {
    margin-left: 0;
    width: 100%;
    padding: 10px 0;
    justify-content: flex-start;
    max-height: 120px;
    overflow-y: auto;
  }

  .filter-tag {
    padding: 5px 12px;
    font-size: 12px;
  }

  /* 视图切换按钮 */
  .view-toggle {
    align-self: flex-end;
    margin-left: 0;
    margin-top: 5px;
  }

  .view-btn {
    width: 32px;
    height: 32px;
    font-size: 16px;
  }

  .main-content {
    padding: 15px;
  }

  .cards-grid {
    grid-template-columns: 1fr;
    gap: 15px;
  }

  .card {
    max-width: 100%;
  }

  .card-title {
    font-size: 16px;
  }

  .admin-panel {
    width: 100%;
    right: -100%;
  }

  .admin-fab {
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    font-size: 20px;
  }

  /* 分页优化 */
  .pagination {
    flex-wrap: wrap;
    gap: 5px;
    padding: 15px;
  }

  .page-btn {
    width: 36px;
    height: 36px;
    font-size: 13px;
  }

  /* 树状视图优化 */
  .tree-view {
    padding: 15px;
  }

  .tree-category-header {
    padding: 8px 12px;
    font-size: 14px;
  }

  .tree-item {
    padding: 6px 10px;
    font-size: 13px;
  }

  .tree-subcategory {
    margin-left: 10px;
    padding-left: 10px;
  }

  .tree-items {
    margin-left: 10px;
    padding-left: 10px;
  }
}

/* 更小屏幕优化 */
@media (max-width: 480px) {
  .navbar {
    padding: 0 10px;
  }

  .brand-text {
    font-size: 14px;
  }

  .btn-login {
    padding: 8px 12px;
    font-size: 12px;
  }

  .btn-login .discord-icon {
    display: none;
  }

  .filter-selects {
    grid-template-columns: 1fr 1fr;
  }

  .filter-group label {
    font-size: 11px;
  }

  .filter-group select {
    padding: 6px 25px 6px 10px;
    font-size: 12px;
  }

  .user-name {
    display: none;
  }

  .admin-badge {
    margin-left: 0;
  }
}