/* 基础样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", "Source Han Sans SC", sans-serif;
  line-height: 1.5;
  color: var(--text-primary);
}

/* 主题变量 */
:root {
  --bg-primary: #f5f5f5;
  --bg-secondary: #fff;
  --border-color: #e0e0e0;
  --text-primary: #212529;
  --text-secondary: #666;
  --message-bg: #fff;
  --message-own-bg: #95ec69;
  --message-own-color: #333;
  --message-border: #e0e0e0;
  --input-bg: #f5f5f5;
  --input-border: #ddd;
  --send-btn-bg: #95ec69;
  --send-btn-color: #333;
  --toolbar-btn-color: #666;
  --hover-bg: #f8f9fa;
  --active-bg: #e9ecef;
  --header-bg: #fff;
  --chat-title-color: #C0C0C0;
  --sidebar-width: 250px; /* 添加侧边栏宽度变量 */
  --error-color: #dc3545; /* 错误颜色 */
  --copyright-color: rgba(0, 0, 0, 0.7);
}

/* 暗色主题 */
[data-theme="dark"] {
  --bg-primary: #1a1a1a;
  --bg-secondary: #2d2d2d;
  --border-color: #404040;
  --text-primary: #e1e1e1;
  --text-secondary: #888;
  --message-bg: #2d2d2d;
  --message-own-bg: #0A84FF;
  --message-own-color: #fff;
  --message-border: #404040;
  --input-bg: #2d2d2d;
  --input-border: #404040;
  --send-btn-bg: #2d9c3c;
  --send-btn-color: #fff;
  --toolbar-btn-color: #aaa;
  --hover-bg: #3a3a3a;
  --active-bg: #444;
  --header-bg: #2d2d2d;
  --chat-title-color: #e1e1e1;
  --sidebar-width: 250px; /* 保持与亮色主题相同的侧边栏宽度 */
  --error-color: #ff6b6b; /* 暗色主题的错误颜色 */
  --copyright-color: rgba(255, 255, 255,0.8);
}

/* 应用主题变量 */
.chat-container {
  display: flex;
  height: 100vh;
  background-color: var(--bg-primary);
}

/* 侧边栏样式 */
.sidebar {
  width: var(--sidebar-width);
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 1000;
  transition: transform 0.3s ease;
}

/* 用户个人资料样式 */
.user-profile {
  padding: 20px;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}

.profile-header {
  display: flex;
  align-items: center;
  gap: 15px;
}

.avatar-container {
  position: relative;
}

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

.status-indicator {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid #fff;
}

.status-indicator.online {
  background-color: #28a745;
}

.status-indicator.offline {
  background-color: #dc3545;
}

.user-info h3 {
  font-size: 16px;
  margin-bottom: 4px;
}

.user-info .status {
  font-size: 14px;
  color: #6c757d;
}

/* 用户列表容器 */
.users-container {
  flex: 1;
  overflow-y: auto;
}

.users-title {
  padding: 15px 20px;
  font-size: 14px;
  color: var(--text-secondary);
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

/* 用户列表样式 */
.user-list {
  overflow-y: auto;
  background-color: var(--bg-secondary);
}

.no-friends {
  padding: 20px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 14px;
  background-color: var(--bg-secondary);
}

.no-friends p {
  margin: 0;
  padding: 10px;
  border: 1px dashed var(--border-color);
  border-radius: 8px;
}

.user-item {
  display: flex;
  align-items: center;
  padding: 12px 20px;
  cursor: pointer;
  transition: background-color 0.2s;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
  gap: 15px;
}

.user-item.offline {
  opacity: 0.7;
}

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

.user-item.active {
  background-color: var(--active-bg);
}

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

.user-item .user-info {
  display: flex;
  flex-direction: column;
  gap: 4px; /* 用户名和状态之间的间距 */
}

.user-item .user-name {
  color: var(--text-primary);
  font-size: 16px; /* 增大字体大小 */
  font-weight: 600; /* 加粗字体 */
}

.user-item .user-status {
  color: var(--text-secondary);
  font-size: 13px;
}

/* 版权信息 */
.copyright {
  margin-top: 20px;
  color: var(--copyright-color);
  font-size: 13px;
  text-align: center;
  width: 100%;
  max-width: 400px;
  font-weight: 500;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
  background-color: rgba(255, 255, 255, 0.1);
  padding: 10px;
  border-radius: 5px;
  backdrop-filter: blur(5px);
}

/* 主内容区域 */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  margin-left: var(--sidebar-width);
  width: calc(100% - var(--sidebar-width));
  height: 100vh;
  position: relative;
}

/* 聊天头部 */
.chat-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 20px;
  background-color: var(--header-bg);
  border-bottom: 1px solid var(--border-color);
  position: fixed;
  top: 0;
  right: 0;
  left: var(--sidebar-width); /* 使用变量 */
  z-index: 1000;
  height: 60px;
}

.chat-header h2 {
  font-size: 18px;
  color: var(--chat-title-color);
}

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

.logout-btn {
  padding: 8px 15px;
  background-color: #dc3545;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 5px;
  transition: background-color 0.2s;
}

.logout-btn:hover {
  background-color: #c82333;
}

/* 聊天区域样式 */
.chat-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-secondary);
  margin-top: 60px; /* 与头部高度相同 */
  margin-bottom: 120px; /* 为输入区域留出空间 */
  height: calc(100vh - 60px); /* 只减去头部高度 */
  overflow: hidden;
}

/* 消息列表容器 */
.messages {
  flex: 1;
  padding: 20px;
  padding-bottom: 20px;
  overflow-y: auto;
  background-color: var(--bg-primary);
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch; /* 增加 iOS 滚动惯性 */
  overscroll-behavior: contain; /* 防止滚动链接 */
  display: flex;
  flex-direction: column;
  height: 100%;
  position: relative;
}

/* 消息样式 */
.message {
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  padding: 0 20px;
  position: relative;
  width: 100%; /* 确保消息宽度占满容器 */
}

.message.own {
  align-items: flex-end;
}

.message.other {
  align-items: flex-start;
}

.message-header {
  display: flex;
  align-items: center;
  margin-bottom: 5px;
  gap: 8px;
}

.message.own .message-header {
  flex-direction: row-reverse;
}

.message-avatar {
  width: 32px;
  height: 32px;
}

.message.own .message-avatar {
  margin-left: 8px;
}

.message-avatar img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.message-nickname {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
}

.message.own .message-nickname {
  margin-right: 5px;
}

.message-time {
  font-size: 12px;
  color: var(--text-secondary);
  opacity: 0.7;
}

.message-content {
  position: relative;
  width: 100%;
  padding: 0 42px;
  display: flex;
}

.message.own .message-content {
  justify-content: flex-end;
}

.message.other .message-content {
  justify-content: flex-start;
}

.message-bubble {
  max-width: 85%;
  padding: 12px 16px;
  border-radius: 16px;
  position: relative;
  word-wrap: break-word;
  box-shadow: 0 1px 2px rgba(0,0,0,0.1);
  min-width: 60px;
  background-color: var(--message-bg);
  color: var(--text-primary);
  border: 1px solid var(--message-border);
}

/* 媒体消息的气泡样式 */
.message-bubble.media-content {
  padding: 8px;
  background-color: transparent;
  border: none;
  box-shadow: none;
}

.message.own .message-bubble {
  background-color: var(--message-own-bg);
  color: var(--message-own-color);
  border: none;
  box-shadow: 0 1px 2px rgba(0,0,0,0.15);
}

.message.other .message-bubble {
  background-color: var(--message-bg);
  color: var(--text-primary);
  border: 1px solid var(--message-border);
}

/* 列表样式调整 */
.message-bubble ul,
.message-bubble ol {
  padding-left: 24px;
  margin: 8px 0;
}

.message-bubble ul li,
.message-bubble ol li {
  margin: 4px 0;
}

/* 任务列表样式 */
.message-bubble ul.task-list {
  list-style: none;
  padding-left: 24px;
}

.message-bubble ul.task-list li {
  position: relative;
  padding-left: 20px;
}

.message-bubble ul.task-list li input[type="checkbox"] {
  position: absolute;
  left: 0;
  top: 4px;
}

/* 媒体内容样式 */
.message-image, 
.message-bubble img {
  width: 100%;
  max-width: 480px;
  height: auto;
  max-height: 480px;
  object-fit: contain;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  background-color: var(--bg-secondary);
  display: block;
}

.message-video {
  width: 100%;
  max-width: 480px;
  max-height: 480px;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  background-color: var(--bg-secondary);
  display: block;
}

.message-audio {
  width: 100%;
  max-width: 300px;
  height: 54px;
  border-radius: 27px;
  background-color: var(--bg-secondary);
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  padding: 8px;
}

.message-file {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: inherit;
  text-decoration: none;
  background-color: rgba(0,0,0,0.05);
  padding: 12px 16px;
  border-radius: 12px;
  width: 280px;
  transition: background-color 0.2s;
}

.message.own .message-file {
  background-color: rgba(0,0,0,0.1);
}

.message-file:hover {
  background-color: rgba(0,0,0,0.08);
}

.message.own .message-file:hover {
  background-color: rgba(255,255,255,0.15);
}

.message-file .file-info {
  flex: 1;
  min-width: 0;
  margin-right: 12px;
  overflow: hidden;
}

.message-file .file-name {
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 4px;
  color: var(--text-primary);
}

.message.own .message-file .file-name {
  color: var(--message-own-color);
}

.message-file .file-size {
  font-size: 12px;
  color: var(--text-secondary);
}

.message.own .message-file .file-size {
  color: var(--message-own-color);
  opacity: 0.7;
}

.message-file i {
  font-size: 24px;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.message.own .message-file i {
  color: var(--message-own-color);
  opacity: 0.9;
}

/* 输入区域样式 */
.input-area {
  position: fixed;
  bottom: 0;
  left: var(--sidebar-width);
  right: 0;
  background-color: var(--bg-secondary);
  padding: 15px 20px;
  border-top: 1px solid var(--border-color);
  z-index: 100;
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
  min-height: 80px; /* 改为最小高度而不是固定高度 */
}

.message-form {
  position: relative;
  width: 100%; /* 使用百分比宽度 */
  max-width: 1920px; /* 限制最大宽度 */
  margin: 0 auto; /* 水平居中 */
}

.input-wrapper {
  position: relative;
  display: flex;
  flex-direction: column; /* 改回垂直排列 */
  width: 100%; /* 确保占满容器宽度 */
}

.toolbar {
  position: static;
  display: flex;
  gap: 12px; /* 增加按钮间距 */
  z-index: 2;
  transform: none;
  padding-left: 0; /* 移除左侧内边距 */
  margin-bottom: 8px; /* 与输入框间距 */
}

.toolbar-btn {
  background: none;
  border: none;
  padding: 1px 5px 8px 5px; /* 增加按钮内边距 */
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 15px; /* 稍微增大图标 */
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s;
}

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

.message-input {
  width: 100%; /* 确保宽度100% */
  min-height: 60px;
  height: 80px;
  padding: 10px 100px 10px 15px; /* 右侧留出按钮空间 */
  border: 1px solid var(--border-color);
  border-radius: 20px;
  background-color: var(--input-bg);
  color: var(--text-color);
  font-size: 14px;
  line-height: 1.5;
  resize: none;
  overflow-y: auto;
}

.message-input:focus {
  outline: none;
  border-color: var(--primary-color);
}

.send-btn {
  position: absolute; /* 恢复绝对定位 */
  right: 5px;
  top: 50%;
  transform: translateY(-50%);
  padding: 8px 20px;
  background-color: #07C160;
  color: white;
  border: none;
  border-radius: 18px;
  cursor: pointer;
  font-size: 14px;
  transition: background-color 0.2s;
  min-width: 80px; /* 设置最小宽度 */
}

.send-btn:hover {
  background-color: #06AE56;
}

.file-input {
  display: none;
}

/* 移动端适配 */
@media (max-width: 768px) {
  .main-content {
    margin-left: 0;
    width: 100%;
  }
  
  .input-area {
    left: 0;
    min-height: 70px; /* 减小移动端最小高度 */
    padding: 10px 15px;
  }
  
  .chat-area {
    margin-bottom: 100px; /* 移动端输入区域高度为100px */
  }
  
  .messages {
    padding: 15px;
    padding-bottom: 10px;
    scroll-behavior: auto; /* 移动端使用即时滚动 */
    overscroll-behavior-y: contain; /* 确保在移动端也生效 */
  }

  .toolbar {
    gap: 8px;
  }

  .toolbar-btn {
    padding: 6px;
    font-size: 18px;
  }

  .message-image,
  .message-bubble img {
    max-width: 360px;
    max-height: 360px;
  }

  .message-video {
    max-width: 360px;
    max-height: 360px;
  }

  .message-audio {
    max-width: 240px;
    height: 48px;
    border-radius: 24px;
  }

  .message-input {
    min-height: 36px;
    height: 36px;
    padding: 8px 80px 8px 12px; /* 调整内边距 */
  }

  .send-btn {
    padding: 6px 15px;
    font-size: 13px;
    min-width: 70px;
    right: 5px;
  }
}

@media (max-width: 480px) {
  .messages {
    padding-bottom: 5px; /* 保持与其他屏幕尺寸一致的底部内边距 */
  }

  .message-image,
  .message-bubble img {
    max-width: 280px;
    max-height: 320px;
  }

  .message-video {
    max-width: 280px;
    max-height: 320px;
  }

  .message-audio {
    max-width: 200px;
  }

  .input-area {
    padding: 8px 10px;
  }
  
  .input-wrapper {
    gap: 6px;
  }
  
  .message-input {
    padding: 8px 70px 8px 10px; /* 调整内边距 */
  }
  
  .send-btn {
    padding: 5px 12px;
    min-width: 60px;
    font-size: 12px;
  }
}

/* 移除旧的快捷键提示样式 */
.shortcut-hint {
  display: none;
}

/* Markdown 样式 */
.message-bubble pre {
  background-color: rgba(0, 0, 0, 0.1);
  padding: 10px;
  border-radius: 5px;
  overflow-x: auto;
  margin: 8px 0;
  position: relative; /* 添加相对定位，用于放置复制按钮 */
}

/* 代码块复制按钮 */
.code-copy-btn {
  position: absolute;
  top: 5px;
  right: 5px;
  background-color: rgba(255, 255, 255, 0.7);
  border: none;
  border-radius: 3px;
  padding: 3px 6px;
  font-size: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.7;
  transition: opacity 0.2s;
  color: #333;
  z-index: 10;
}

.code-copy-btn:hover {
  opacity: 1;
}

.code-copy-btn i {
  font-size: 14px;
}

/* 暗色主题下的复制按钮 */
[data-theme="dark"] .code-copy-btn {
  background-color: rgba(50, 50, 50, 0.7);
  color: #eee;
}

.message-bubble code {
  font-family: monospace;
  padding: 2px 4px;
  background-color: rgba(0, 0, 0, 0.1);
  border-radius: 3px;
}

.message-bubble blockquote {
  border-left: 3px solid #6c757d;
  margin: 8px 0;
  padding-left: 10px;
  color: #6c757d;
}

.message-bubble table {
  border-collapse: collapse;
  width: 100%;
  margin: 10px 0;
  overflow-x: auto;
  display: block;
}

/* 表格容器，用于在小屏幕上实现水平滚动 */
.table-wrapper {
  overflow-x: auto;
  margin: 10px 0;
}

.markdown-table {
  border-collapse: collapse;
  width: 100%;
  min-width: 240px;
}

.message-bubble th,
.message-bubble td {
  border: 1px solid #dee2e6;
  padding: 8px;
  text-align: left;
}

/* 表格对齐方式 */
.message-bubble th.text-center,
.message-bubble td.text-center {
  text-align: center;
}

.message-bubble th.text-right,
.message-bubble td.text-right {
  text-align: right;
}

.message-bubble th.text-left,
.message-bubble td.text-left {
  text-align: left;
}

.message-bubble th {
  background-color: rgba(0, 0, 0, 0.05);
}

/* 响应式设计 */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    will-change: transform;
    z-index: 2000;
  }
  
  .sidebar.show {
    transform: translateX(0);
    box-shadow: 2px 0 8px rgba(0, 0, 0, 0.1);
  }

  /* 添加遮罩层 */
  .sidebar.show::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: -1;
  }
  
  .main-content {
    margin-left: 0;
    width: 100%;
  }
  
  .chat-header {
    left: 0;
    padding: 15px 10px;
  }
  
  .input-area {
    left: 0;
    padding: 10px 1%;
    width: 100%;
  }

  .messages {
    padding: 20px 1%;
    padding-bottom: 10px; /* 减小底部内边距 */
  }
  
  .message {
    padding: 0;
    width: 98%;
    margin: 0 auto 20px auto;
  }

  .message-content {
    padding: 0 32px;
  }

  .message-header {
    padding: 0 32px;
  }

  .message-avatar {
    left: 0;
  }

  .message.own .message-avatar {
    right: 0;
  }

  .message-bubble {
    max-width: 98%;
    min-width: 60px;
  }
  
  .chat-header h2 {
    font-size: 16px;
  }
  
  .logout-btn span {
    display: none;
  }

  /* 添加菜单按钮 */
  .menu-btn {
    display: flex !important;
  }

  /* 移动端媒体内容样式 */
  .message-image,
  .message-bubble img {
    max-width: 360px;
    max-height: 360px;
  }

  .message-video {
    max-width: 360px;
    max-height: 360px;
  }

  .message-audio {
    max-width: 240px;
    height: 48px;
    border-radius: 24px;
  }

  /* 移动端媒体消息的气泡样式 */
  .message-bubble.media-content {
    padding: 4px;
    max-width: 90%;
  }

  .message-file {
    width: 240px;
    padding: 10px 14px;
  }
  
  .message-file .file-name {
    font-size: 13px;
  }
  
  .message-file .file-size {
    font-size: 11px;
  }
  
  .message-file i {
    font-size: 20px;
  }

  /* 移动设备表格样式调整 */
  .table-wrapper {
    margin: 8px 0;
  }
  
  .markdown-table {
    min-width: 200px;
  }
  
  .message-bubble th,
  .message-bubble td {
    padding: 6px;
    font-size: 13px;
  }
}

/* 小屏幕设备的额外优化 */
@media (max-width: 480px) {
  .message-image,
  .message-bubble img {
    max-width: 280px;
    max-height: 320px;
  }

  .message-video {
    max-width: 280px;
    max-height: 320px;
  }

  .message-audio {
    max-width: 200px;
  }

  .message-file {
    width: 200px;
  }

  /* 小屏幕表格样式 */
  .markdown-table {
    min-width: 180px;
  }
  
  .message-bubble th,
  .message-bubble td {
    padding: 4px;
    font-size: 12px;
  }
}

/* 默认隐藏菜单按钮 */
.menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 20px;
  cursor: pointer;
  padding: 5px;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  margin-right: 10px;
}

.menu-btn i {
  font-size: 24px;
}

/* 主题切换按钮样式 */
.theme-btn {
  padding: 8px 15px;
  background: none;
  border: 1px solid var(--border-color);
  border-radius: 5px;
  cursor: pointer;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.theme-btn:hover {
  background-color: var(--hover-bg);
}

/* Emoji帮助按钮和模态框样式 */
.emoji-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    transition: color 0.2s;
}

.emoji-btn:hover {
    color: #007bff;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 280px;
    right: 0;
    bottom: 140px;
    background-color: transparent;
}

.modal-content {
    background-color: var(--bg-secondary);
    margin: 0 auto;
    padding: 12px; /* 减小内边距 */
    border-radius: 12px;
    width: 95%;
    max-width: 700px;
    max-height: 70vh;
    overflow-y: auto;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    position: relative;
}

.modal h2 {
    font-size: 16px; /* 减小标题字体 */
    margin-bottom: 4px;
    padding-bottom: 8px;
    border-bottom: 2px solid #ff4444;
}

.close {
    position: absolute;
    right: 15px;
    top: 10px;
    color: var(--text-secondary);
    font-size: 24px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.2s;
}

.close:hover {
    color: #ff4444;
}

.emoji-tabs {
    display: flex;
    flex-wrap: nowrap;
    gap: 2px; /* 进一步减小间距 */
    margin: 8px 0;
    padding-bottom: 6px;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    justify-content: flex-start;
}

/* 隐藏滚动条 */
.emoji-tabs::-webkit-scrollbar {
    display: none;
}

.emoji-tab-btn {
    padding: 4px 8px; /* 减小内边距 */
    border: none;
    border-radius: 16px;
    background: var(--bg-primary);
    color: var(--text-primary);
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s;
    font-size: 12px; /* 进一步减小字体 */
    min-width: fit-content; /* 确保按钮宽度适应内容 */
}

.emoji-tab-btn:hover {
    background: var(--hover-bg);
    transform: translateY(-1px);
}

.emoji-tab-btn.active {
    background: #007bff;
    color: white;
    box-shadow: 0 2px 8px rgba(0, 123, 255, 0.3);
}

.emoji-panels {
    position: relative;
    min-height: 200px;
    margin-bottom: 10px;
}

.emoji-panel {
    display: none;
    position: absolute;
    width: 100%;
    top: 0;
    left: 0;
}

.emoji-panel.active {
    display: block;
}

.emoji-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr); /* 改为7列 */
    gap: 6px; /* 减小间距 */
    padding: 8px;
}

.emoji-item {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 6px;
    border-radius: 6px;
    background-color: var(--bg-primary);
    cursor: pointer;
    transition: all 0.2s;
}

.emoji-item:hover {
    background-color: var(--hover-bg);
    transform: scale(1.1);
}

.emoji-item .emoji {
    font-size: 22px; /* 稍微减小表情大小 */
    line-height: 1;
}

/* 移除搜索框相关样式 */
.emoji-search {
    display: none;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .modal {
        left: 0;
        bottom: 120px;
    }
    
    .modal-content {
        max-width: 500px;
    }
    
    .emoji-grid {
        grid-template-columns: repeat(6, 1fr);
    }
    
    .emoji-item .emoji {
        font-size: 20px;
    }
}

@media (max-width: 480px) {
    .emoji-grid {
        grid-template-columns: repeat(5, 1fr);
        gap: 6px;
    }
    
    .emoji-tab-btn {
        padding: 3px 5px;
        font-size: 11px;
    }
    
    .modal-content {
        max-width: 400px;
    }
} 

/* 优化关闭按钮位置 */
.close {
    position: absolute;
    right: 10px;
    top: 8px;
    font-size: 20px;
    cursor: pointer;
    color: var(--text-color);
    padding: 4px;
}

/* 数学公式样式 */
.katex-display {
  margin: 1em 0;
  overflow-x: auto;
  overflow-y: hidden;
  text-align: center;
}

.katex {
  font-size: 1.1em;
}

.message-content .katex-display {
  background-color: var(--bg-light);
  padding: 10px;
  border-radius: 4px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] .message-content .katex-display {
  background-color: var(--bg-dark-secondary);
}

/* 确保行内公式垂直对齐 */
.katex-inline {
  display: inline-block;
  vertical-align: middle;
}

/* 移动端适配 */
@media (max-width: 768px) {
  .katex-display {
    max-width: 100%;
    overflow-x: auto;
  }
  
  .katex {
    font-size: 1em;
  }
}

/* Mermaid图表样式 */
.mermaid-diagram {
  margin: 1em 0;
  padding: 10px;
  background-color: var(--bg-light);
  border-radius: 4px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  overflow-x: auto;
  text-align: center;
  position: relative;
  transition: all 0.3s ease;
}

.mermaid-diagram:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  transform: translateY(-2px);
}

.diagram-tooltip {
  position: absolute;
  top: 10px;
  right: 10px;
  background-color: rgba(0, 0, 0, 0.6);
  color: white;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 12px;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.mermaid-diagram:hover .diagram-tooltip {
  opacity: 1;
}

.diagram-modal-content {
  background-color: var(--bg-light);
}

[data-theme="dark"] .diagram-modal-content {
  background-color: var(--bg-dark);
  color: var(--text-primary);
}

[data-theme="dark"] .diagram-modal-content .close {
  color: var(--text-primary);
}

.diagram-modal .mermaid {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 200px;
}

.diagram-modal .mermaid svg {
  max-width: 100%;
  height: auto;
}

/* 移动端适配 */
@media (max-width: 768px) {
  .mermaid-diagram {
    max-width: 100%;
    overflow-x: auto;
  }
  
  .mermaid-diagram svg {
    max-width: 100%;
  }
}

/* 移动端适配 */
@media (max-width: 768px) {
  .emoji-grid {
    grid-template-columns: repeat(4, 1fr); /* 移动端每行显示4个 */
  }
}

@media (max-width: 480px) {
  .emoji-grid {
    grid-template-columns: repeat(3, 1fr); /* 小屏幕每行显示3个 */
  }
}

/* 调整模态框大小和滚动 */
.modal-content {
  max-width: 400px;
  max-height: 80vh;
  overflow-y: auto;
  padding: 20px;
}

.emoji-panels {
  max-height: calc(80vh - 120px);
  overflow-y: auto;
}

.emoji-panel {
  display: none;
  width: 100%;
}

.emoji-panel.active {
  display: block;
}

/* 帮助模态框中的代码块样式 */
.modal-content pre {
    position: relative;
    background-color: rgba(0, 0, 0, 0.1);
    padding: 10px;
    border-radius: 5px;
    overflow-x: auto;
    margin: 8px 0;
}

/* 帮助模态框中的复制按钮样式 */
.modal-content .copy-btn {
    position: absolute;
    top: 5px;
    right: 5px;
    background-color: rgba(255, 255, 255, 0.7);
    border: none;
    border-radius: 3px;
    padding: 3px 6px;
    font-size: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.7;
    transition: opacity 0.2s;
    color: #333;
    z-index: 10;
}

.modal-content .copy-btn:hover {
    opacity: 1;
}

[data-theme="dark"] .modal-content .copy-btn {
    background-color: rgba(50, 50, 50, 0.7);
    color: #eee;
}

/* 加载更多按钮样式 */
.load-more-wrapper {
  display: flex;
  justify-content: center;
  margin: 10px 0;
  padding: 5px;
}

.load-more-btn {
  background-color: #0069d9; /* 使用更深的蓝色增强对比度 */
  color: white;
  border: none;
  border-radius: 15px;
  padding: 8px 16px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600; /* 加粗文字 */
  transition: background-color 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1); /* 添加微妙的阴影增强可见性 */
}

.load-more-btn:hover {
  background-color: #0056b3; /* 悬停时的更深色 */
}

/* 暗色主题保持原样 */
[data-theme="dark"] .load-more-btn {
  background-color: var(--accent-light);
  box-shadow: none;
}

[data-theme="dark"] .load-more-btn:hover {
  background-color: var(--accent-dark);
}

.loading-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 0.8s linear infinite;
  margin-right: 8px;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Lightbox 样式 */
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.9);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 9999;
}

.lightbox.active {
  display: flex;
}

.lightbox-content {
  position: relative;
  max-width: 90%;
  max-height: 90%;
  margin: auto;
}

.lightbox-image {
  max-width: 100%;
  max-height: 90vh;
  object-fit: contain;
  display: block;
  margin: 0 auto;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  transform: translateY(-50%);
  padding: 0 20px;
}

.lightbox-nav button {
  background-color: rgba(0, 0, 0, 0.5);
  color: white;
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  font-size: 20px;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.lightbox-nav button:hover {
  background-color: rgba(0, 0, 0, 0.8);
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background-color: rgba(0, 0, 0, 0.5);
  color: white;
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  font-size: 24px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s ease;
}

.lightbox-close:hover {
  background-color: rgba(0, 0, 0, 0.8);
}

.lightbox-counter {
  position: absolute;
  bottom: -30px;
  left: 0;
  right: 0;
  text-align: center;
  color: white;
  font-size: 14px;
}

/* 消息图片样式增强 */
.message-image {
  max-width: 100%;
  border-radius: 8px;
  cursor: pointer;
  transition: transform 0.2s ease;
}

.message-image:hover {
  transform: scale(1.03);
}

/* 移动端适配 */
@media (max-width: 768px) {
  .lightbox-nav button {
    width: 36px;
    height: 36px;
    font-size: 18px;
  }
  
  .lightbox-close {
    width: 36px;
    height: 36px;
    font-size: 20px;
    top: 10px;
    right: 10px;
  }
  
  .load-more-btn {
    padding: 6px 12px;
    font-size: 13px;
  }
}

@media (max-width: 480px) {
  .lightbox-nav button {
    width: 32px;
    height: 32px;
    font-size: 16px;
  }
  
  .lightbox-close {
    width: 32px;
    height: 32px;
    font-size: 18px;
    top: 5px;
    right: 5px;
  }
  
  .load-more-btn {
    padding: 5px 10px;
    font-size: 12px;
  }
}

/* 欢迎页面样式 */
.welcome-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
  height: 100%;
  min-height: 400px;
}

.welcome-content {
  max-width: 600px;
  padding: 30px;
  background-color: var(--bg-secondary);
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  text-align: center;
  color: var(--text-primary);
}

.welcome-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 20px;
}

.welcome-logo {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin-bottom: 15px;
  object-fit: cover;
  border: 4px solid var(--send-btn-bg);
}

.welcome-header h1 {
  font-size: 24px;
  margin: 15px 0;
}

.welcome-message {
  text-align: left;
}

.welcome-message p {
  margin: 15px 0;
  font-size: 16px;
  line-height: 1.5;
}

.welcome-message ul {
  padding-left: 20px;
  margin: 15px 0;
}

.welcome-message li {
  margin: 10px 0;
  font-size: 16px;
  line-height: 1.5;
}

.welcome-tip {
  display: flex;
  align-items: center;
  background-color: rgba(149, 236, 105, 0.1);
  padding: 15px;
  border-radius: 8px;
  margin-top: 20px;
  border-left: 4px solid var(--send-btn-bg);
}

.welcome-tip i {
  font-size: 24px;
  color: var(--send-btn-bg);
  margin-right: 15px;
}

.welcome-tip p {
  margin: 0;
  font-weight: 500;
}

/* 暗色主题欢迎页面样式调整 */
[data-theme="dark"] .welcome-tip {
  background-color: rgba(45, 156, 60, 0.1);
}

[data-theme="dark"] .welcome-tip i {
  color: var(--send-btn-bg);
}

[data-theme="dark"] .welcome-logo {
  border-color: var(--send-btn-bg);
}

/* 媒体查询适配 */
@media (max-width: 768px) {
  .welcome-content {
    width: 90%;
    padding: 20px;
  }
  
  .welcome-header h1 {
    font-size: 20px;
  }
  
  .welcome-logo {
    width: 60px;
    height: 60px;
  }
  
  .welcome-message p,
  .welcome-message li,
  .welcome-tip p {
    font-size: 14px;
  }
}

@media (max-width: 480px) {
  .welcome-content {
    width: 95%;
    padding: 15px;
  }
  
  .welcome-header h1 {
    font-size: 18px;
  }
  
  .welcome-logo {
    width: 50px;
    height: 50px;
  }
  
  .welcome-tip {
    padding: 10px;
  }
  
  .welcome-tip i {
    font-size: 18px;
  }
}

/* 图表帮助模态框样式 */
.diagram-help-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
}

.diagram-help-modal .modal-content {
  background-color: var(--bg-secondary);
  border-radius: 10px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
  max-width: 80%;
  max-height: 80vh;
  width: 800px;
  overflow-y: auto;
  padding: 20px;
  position: relative;
}

.diagram-help-modal .close {
  position: absolute;
  top: 15px;
  right: 15px;
  font-size: 24px;
  color: var(--text-secondary);
  cursor: pointer;
  z-index: 10;
}

.diagram-help-modal .help-content {
  padding: 10px 0;
}

.diagram-help-modal h2 {
  margin-bottom: 15px;
  color: var(--text-primary);
  border-bottom: 2px solid #ff4444;
  padding-bottom: 10px;
}

.diagram-help-modal pre {
  background-color: var(--bg-primary);
  border-radius: 5px;
  padding: 10px;
  overflow-x: auto;
  margin: 10px 0;
}

/* 移动端适配 */
@media (max-width: 768px) {
  .diagram-help-modal .modal-content {
    max-width: 90%;
    width: auto;
    padding: 15px;
  }
  
  .diagram-help-modal pre {
    font-size: 12px;
  }
}

@media (max-width: 480px) {
  .diagram-help-modal .modal-content {
    max-width: 95%;
    padding: 10px;
  }
}

/* 图表帮助模态框暗色主题样式 */
[data-theme="dark"] .diagram-help-modal .modal-content {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

[data-theme="dark"] .diagram-help-modal pre {
  background-color: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-color);
}

[data-theme="dark"] .diagram-help-modal .close {
  color: var(--text-primary);
}

[data-theme="dark"] .diagram-help-modal a {
  color: #58a6ff;
}

[data-theme="dark"] .diagram-help-modal h3,
[data-theme="dark"] .diagram-help-modal h4 {
  color: var(--text-primary);
}