/* 全局样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #6a1b9a;
  --secondary-color: #8e24aa;
  --background-color: #f5f5f5;
  --text-color: #333;
  --card-background: #fff;
  --border-color: #e0e0e0;
  --accent-color: #ff4081;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

/* 暗黑模式 */
body.dark-mode {
  --primary-color: #9c27b0;
  --secondary-color: #ba68c8;
  --background-color: #121212;
  --text-color: #e0e0e0;
  --card-background: #1e1e1e;
  --border-color: #333;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  line-height: 1.6;
  transition: var(--transition);
}

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

/* 玻璃效果 */
.glass-effect {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 10px;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

body.dark-mode .glass-effect {
  background: rgba(30, 30, 30, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* 按钮样式 */
.btn {
  display: inline-block;
  padding: 10px 20px;
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-size: 16px;
  transition: var(--transition);
}

.btn:hover {
  background-color: var(--secondary-color);
  transform: translateY(-2px);
}

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

.btn.primary:hover {
  background-color: #ff5c8d;
}

.action-btn {
  background: none;
  border: none;
  color: var(--text-color);
  cursor: pointer;
  font-size: 18px;
  padding: 8px;
  border-radius: 50%;
  transition: var(--transition);
}

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

body.dark-mode .action-btn:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

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

.form-group label {
  display: block;
  margin-bottom: 5px;
  font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: 5px;
  background-color: var(--card-background);
  color: var(--text-color);
  font-size: 16px;
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(106, 27, 154, 0.2);
}

/* 电脑端顶部导航栏 */
.desktop-header {
  position: sticky;
  top: 0;
  background-color: var(--card-background);
  box-shadow: var(--shadow);
  z-index: 1000;
  transition: var(--transition);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 0;
}

.logo h1 {
  font-size: 24px;
  color: var(--primary-color);
  font-weight: 700;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

.search-box {
  position: relative;
  width: 300px;
}

.search-box input {
  width: 100%;
  padding: 10px 40px 10px 15px;
  border: 1px solid var(--border-color);
  border-radius: 25px;
  background-color: var(--background-color);
  color: var(--text-color);
  transition: var(--transition);
}

.search-box input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(106, 27, 154, 0.2);
}

.search-box button {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-color);
  cursor: pointer;
  font-size: 16px;
}

.user-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.user-menu {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  background-color: var(--card-background);
  box-shadow: var(--shadow);
  border-radius: 5px;
  padding: 10px 0;
  min-width: 150px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: var(--transition);
  z-index: 1001;
}

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

.dropdown-menu a {
  display: block;
  padding: 10px 15px;
  color: var(--text-color);
  text-decoration: none;
  transition: var(--transition);
}

.dropdown-menu a:hover {
  background-color: var(--background-color);
}

.notification-badge {
  position: absolute;
  top: -5px;
  right: -5px;
  background-color: var(--accent-color);
  color: white;
  border-radius: 50%;
  width: 20px;
  height: 20px;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 移动端顶部栏 */
.mobile-header {
  display: none;
  background-color: var(--card-background);
  box-shadow: var(--shadow);
  padding: 15px 0;
  text-align: center;
}

.mobile-header h1 {
  font-size: 20px;
  color: var(--primary-color);
}

/* 移动端搜索框 */
.mobile-search {
  display: none;
  padding: 15px 0;
  background-color: var(--background-color);
}

.mobile-search .search-box {
  width: 100%;
}

/* 主内容区域 */
.main-content {
  padding: 30px 0;
  min-height: calc(100vh - 120px);
}

/* 电脑端三栏布局 */
.desktop-layout {
  display: grid;
  grid-template-columns: 10% 70% 20%;
  gap: 30px;
}

/* 左侧边栏 */
.left-sidebar {
  display: none;
  position: sticky;
  top: 100px;
  height: fit-content;
}

.author-info {
  background-color: var(--card-background);
  border-radius: 10px;
  padding: 20px;
  box-shadow: var(--shadow);
  text-align: center;
}

.avatar img {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 15px;
}

.author-info h3 {
  margin-bottom: 10px;
  color: var(--text-color);
}

.author-info p {
  font-size: 14px;
  color: #666;
  margin-bottom: 15px;
}

body.dark-mode .author-info p {
  color: #aaa;
}

.author-meta {
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: 12px;
  color: #666;
}

body.dark-mode .author-meta {
  color: #aaa;
}

/* 中间内容区 */
.content-area {
  min-height: 100vh;
}

.section {
  margin-bottom: 40px;
}

.section h2 {
  margin-bottom: 20px;
  color: var(--text-color);
  font-size: 24px;
  font-weight: 600;
}

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

.filter-buttons {
  display: flex;
  gap: 10px;
}

.filter-btn {
  padding: 8px 16px;
  border: 1px solid var(--border-color);
  background-color: var(--card-background);
  color: var(--text-color);
  border-radius: 20px;
  cursor: pointer;
  transition: var(--transition);
  font-size: 14px;
}

.filter-btn:hover,
.filter-btn.active {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

/* 文章网格 */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

/* 文章列表 */
.article-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.article-card {
  background-color: var(--card-background);
  border-radius: 10px;
  padding: 20px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  cursor: pointer;
}

.article-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.article-card h3 {
  margin-bottom: 10px;
  color: var(--text-color);
  font-size: 18px;
  font-weight: 600;
}

.article-card p {
  margin-bottom: 15px;
  color: #666;
  font-size: 14px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

body.dark-mode .article-card p {
  color: #aaa;
}

.article-card .article-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: #999;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 10px 0;
}

.tag {
  padding: 4px 12px;
  background-color: var(--background-color);
  color: var(--primary-color);
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
}

/* 分页 */
.pagination {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 30px;
}

.pagination button {
  padding: 8px 16px;
  border: 1px solid var(--border-color);
  background-color: var(--card-background);
  color: var(--text-color);
  border-radius: 5px;
  cursor: pointer;
  transition: var(--transition);
}

.pagination button:hover,
.pagination button.active {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

/* 右侧边栏 */
.right-sidebar {
  display: none;
  position: sticky;
  top: 100px;
  height: fit-content;
}

.notes-container {
  background-color: var(--card-background);
  border-radius: 10px;
  padding: 20px;
  box-shadow: var(--shadow);
}

.notes-container h3 {
  margin-bottom: 15px;
  color: var(--text-color);
  font-size: 16px;
  font-weight: 600;
}

.notes-content {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-color);
}

/* 文章详情页 */
.article-detail {
  background-color: var(--card-background);
  border-radius: 10px;
  padding: 30px;
  box-shadow: var(--shadow);
  margin-bottom: 30px;
}

.article-detail h1 {
  margin-bottom: 20px;
  color: var(--text-color);
  font-size: 28px;
  font-weight: 700;
  line-height: 1.3;
}

.article-meta {
  display: flex;
  gap: 20px;
  margin-bottom: 20px;
  font-size: 14px;
  color: #666;
}

body.dark-mode .article-meta {
  color: #aaa;
}

.article-content {
  margin-bottom: 30px;
  line-height: 1.8;
  color: var(--text-color);
}

.article-content h2,
.article-content h3,
.article-content h4 {
  margin: 20px 0 10px;
  color: var(--text-color);
}

.article-content p {
  margin-bottom: 15px;
}

.article-content img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin: 20px 0;
}

.article-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}

.article-id {
  font-size: 14px;
  color: #999;
}

.article-actions {
  display: flex;
  gap: 15px;
}

/* 评论区 */
.comments-section {
  background-color: var(--card-background);
  border-radius: 10px;
  padding: 30px;
  box-shadow: var(--shadow);
}

.comments-section h3 {
  margin-bottom: 20px;
  color: var(--text-color);
  font-size: 20px;
  font-weight: 600;
}

.comment-form {
  margin-bottom: 30px;
}

.comment-form textarea {
  width: 100%;
  padding: 15px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background-color: var(--background-color);
  color: var(--text-color);
  font-size: 16px;
  resize: vertical;
  min-height: 100px;
  margin-bottom: 15px;
}

.comments-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.comment-item {
  padding: 15px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background-color: var(--background-color);
}

.comment-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.comment-avatar img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
}

.comment-author {
  font-weight: 600;
  color: var(--text-color);
}

.comment-time {
  font-size: 12px;
  color: #999;
}

.comment-content {
  color: var(--text-color);
  line-height: 1.5;
}

/* 模态框 */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 2000;
  justify-content: center;
  align-items: center;
}

.modal.show {
  display: flex;
}

.modal-content {
  background-color: var(--card-background);
  border-radius: 10px;
  padding: 30px;
  max-width: 80%;
  max-height: 80%;
  overflow-y: auto;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  position: relative;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
  color: var(--text-color);
  font-size: 18px;
  font-weight: 600;
}

.modal-header button {
  background: none;
  border: none;
  font-size: 24px;
  color: var(--text-color);
  cursor: pointer;
  padding: 0;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: var(--transition);
}

.modal-header button:hover {
  background-color: var(--background-color);
}

.modal-body {
  color: var(--text-color);
  line-height: 1.6;
}

/* 登录/注册页 */
.auth-container {
  max-width: 500px;
  margin: 0 auto;
  background-color: var(--card-background);
  border-radius: 10px;
  padding: 30px;
  box-shadow: var(--shadow);
}

.auth-tabs {
  display: flex;
  margin-bottom: 30px;
  border-bottom: 1px solid var(--border-color);
}

.auth-tab {
  flex: 1;
  padding: 15px;
  background: none;
  border: none;
  color: var(--text-color);
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  border-bottom: 2px solid transparent;
}

.auth-tab:hover,
.auth-tab.active {
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
}

.auth-forms form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* 个人中心页 */
.profile-header {
  text-align: center;
  margin-bottom: 30px;
}

.profile-header .avatar img {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 15px;
}

.profile-header h2 {
  margin-bottom: 15px;
  color: var(--text-color);
}

.profile-content {
  background-color: var(--card-background);
  border-radius: 10px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.profile-nav {
  display: flex;
  border-bottom: 1px solid var(--border-color);
}

.profile-tab {
  flex: 1;
  padding: 15px;
  background: none;
  border: none;
  color: var(--text-color);
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  border-bottom: 2px solid transparent;
}

.profile-tab:hover,
.profile-tab.active {
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
}

.profile-tabs {
  padding: 30px;
}

.profile-tab-content {
  display: none;
}

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

/* 消息页 */
.messages-filter {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.message-filter-btn {
  padding: 8px 16px;
  border: 1px solid var(--border-color);
  background-color: var(--card-background);
  color: var(--text-color);
  border-radius: 20px;
  cursor: pointer;
  transition: var(--transition);
  font-size: 14px;
}

.message-filter-btn:hover,
.message-filter-btn.active {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.messages-list {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.message-item {
  padding: 15px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background-color: var(--background-color);
  cursor: pointer;
  transition: var(--transition);
}

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

.message-item.unread {
  background-color: rgba(106, 27, 154, 0.1);
  border-left: 4px solid var(--primary-color);
}

.message-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.message-type {
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 10px;
  background-color: var(--primary-color);
  color: white;
}

.message-time {
  font-size: 12px;
  color: #999;
}

.message-content {
  color: var(--text-color);
  line-height: 1.5;
}

/* 移动端导航栏 */
.mobile-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: var(--card-background);
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
  z-index: 999;
  padding: 10px 0;
}

.nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  padding: 10px;
  color: var(--text-color);
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}

.nav-item:hover,
.nav-item.active {
  color: var(--primary-color);
}

.nav-item i {
  font-size: 20px;
}

.nav-item span {
  font-size: 12px;
}

/* 浮动按钮 */
.floating-btn {
  position: fixed;
  bottom: 80px;
  right: 20px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: var(--accent-color);
  color: white;
  border: none;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  transition: var(--transition);
  z-index: 998;
}

.floating-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
}

/* 加载中提示 */
.loading-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 3000;
  justify-content: center;
  align-items: center;
}

.loading-overlay.show {
  display: flex;
}

.loading-spinner {
  width: 50px;
  height: 50px;
  border: 5px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: var(--primary-color);
  animation: spin 1s ease-in-out infinite;
}

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

/* 消息提示 */
.toast {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 15px 20px;
  border-radius: 5px;
  color: white;
  font-weight: 500;
  z-index: 3000;
  opacity: 0;
  transform: translateX(100%);
  transition: var(--transition);
}

.toast.show {
  opacity: 1;
  transform: translateX(0);
}

.toast.success {
  background-color: #4caf50;
}

.toast.error {
  background-color: #f44336;
}

.toast.info {
  background-color: #2196f3;
}

/* 隐藏类 */
.hidden {
  display: none !important;
}

/* 管理员专用 */
.admin-only {
  display: none;
}

.admin .admin-only {
  display: block;
}

/* 响应式设计 */
@media (max-width: 1024px) {
  .desktop-layout {
    grid-template-columns: 15% 70% 15%;
  }
}

@media (max-width: 768px) {
  .desktop-header {
    display: none;
  }
  
  .mobile-header {
    display: block;
  }
  
  .mobile-search {
    display: block;
  }
  
  .desktop-layout {
    display: none;
  }
  
  .mobile-layout {
    display: block;
  }
  
  .mobile-nav {
    display: flex;
  }
  
  .main-content {
    padding-bottom: 80px;
  }
  
  .article-grid {
    grid-template-columns: 1fr;
  }
  
  .article-detail {
    padding: 20px;
  }
  
  .article-detail h1 {
    font-size: 24px;
  }
  
  .comments-section {
    padding: 20px;
  }
  
  .auth-container {
    padding: 20px;
  }
  
  .profile-tabs {
    padding: 20px;
  }
}

@media (min-width: 769px) {
  .mobile-header {
    display: none;
  }
  
  .mobile-search {
    display: none;
  }
  
  .mobile-layout {
    display: none;
  }
  
  .mobile-nav {
    display: none;
  }
  
  .floating-btn {
    display: none;
  }
}

/* 文章详情页侧边栏显示 */
body.article-page .left-sidebar,
body.article-page .right-sidebar {
  display: block;
}

/* 滚动条样式 */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--background-color);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-color);
}