/* ===== XTT AI - ChatGPT 风格 ===== */

/* ===== CSS 变量 ===== */
:root {
  /* 主色调 - ChatGPT 蓝 */
  --primary: #10a37f;
  --primary-hover: #0d8a6a;
  
  /* 浅色主题 */
  --bg-primary: #ffffff;
  --bg-secondary: #f7f7f8;
  --sidebar-bg: #f9f9fa;
  
  --text-primary: #0d0d0d;
  --text-secondary: #6e6e80;
  --text-tertiary: #8e8ea0;
  
  --border-light: #e5e5e5;
  --border-medium: #d9d9e3;
  --input-bg: #ffffff;
  --input-border: #e5e5e5;
  
  /* 深色主题 */
  --dark-bg-primary: #212121;
  --dark-bg-secondary: #171717;
  --dark-bg-tertiary: #2a2a2a;
  --dark-sidebar: #171717;
  
  --dark-text-primary: #f5f5f5;
  --dark-text-secondary: #c9c9c9;
  --dark-text-tertiary: #a5a5a5;
  
  --dark-border: #424242;
  --dark-border-light: #333333;
  --dark-input-bg: #2f2f2f;
  --dark-input-border: #424242;
  
  /* 尺寸 */
  --sidebar-width: 282px;
}

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

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
}

body {
  font-family: 'Söhne', 'ui-sans', 'system-ui', -apple-system, 'Segoe UI', Roboto, Ubuntu, Cantarell, 'Noto Sans', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  display: flex;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  /* 优化渲染性能 */
  will-change: auto;
  transform: translateZ(0);
}

body[data-theme="dark"] {
  background: var(--dark-bg-primary) !important;
  color: var(--dark-text-primary) !important;
}

/* ===== 侧边栏 ===== */
.sidebar {
  width: var(--sidebar-width);
  height: 100%; /* 使用 100% 而不是 100vh，避免浏览器工具栏问题 */
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border-light);
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  z-index: 1000;
  flex-shrink: 0;
  /* 硬件加速 */
  will-change: width, transform;
  transform: translateZ(0);
  backface-visibility: hidden;
  /* 关键：确保 flex 布局正确 */
  min-height: 0;
}

/* 侧边栏收起状态 */
.sidebar-collapsed {
  width: 70px;
}

.sidebar-collapsed .sidebar-search,
.sidebar-collapsed .history-section-title,
.sidebar-collapsed .sidebar-bottom-btn span,
.sidebar-collapsed .user-info,
.sidebar-collapsed .new-chat-btn span {
  display: none;
}

.sidebar-collapsed .sidebar-history {
  overflow: hidden;
}

.sidebar-collapsed .new-chat-btn {
  justify-content: center;
  padding: 12px 0;
}

.sidebar-collapsed .sidebar-bottom-btn {
  justify-content: center;
  padding: 12px 0;
}

[data-theme="dark"] .sidebar {
  background: var(--dark-sidebar);
  border-right-color: var(--dark-border);
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.3);
}

/* 侧边栏顶部 */
.sidebar-top {
  padding: 12px;
  flex-shrink: 0;
  flex-grow: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.sidebar-collapse-btn {
  display: none; /* 默认隐藏，电脑端显示 */
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--border-light);
  border-radius: 8px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  flex-shrink: 0;
}

.sidebar-collapse-btn:hover {
  background: var(--bg-secondary);
  border-color: var(--border-medium);
  color: var(--text-primary);
  transform: scale(1.05);
}

.sidebar-collapse-btn:active {
  transform: scale(0.95);
}

.sidebar-collapse-btn svg {
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar-collapsed .sidebar-collapse-btn svg {
  transform: rotate(180deg);
}

/* 电脑端显示收起按钮 */
@media (min-width: 769px) {
  .sidebar-collapse-btn {
    display: flex;
  }
}

.new-chat-btn {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 12px;
  background: transparent;
  border: 1px solid var(--border-light);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  /* 硬件加速 */
  will-change: background, transform;
  transform: translateZ(0);
  position: relative;
  overflow: hidden;
}

/* 新聊天按钮的涟漪效果 */
.new-chat-btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(16, 163, 127, 0.1);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.new-chat-btn:hover::before {
  width: 300px;
  height: 300px;
}

[data-theme="dark"] .new-chat-btn {
  color: var(--dark-text-primary) !important;
}

.new-chat-btn:hover {
  background: linear-gradient(135deg, rgba(16, 163, 127, 0.08), rgba(13, 138, 106, 0.05));
  border-color: var(--primary);
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 4px 12px rgba(16, 163, 127, 0.15);
}

.new-chat-btn:active {
  transform: translateY(0) scale(0.98);
  box-shadow: 0 2px 6px rgba(16, 163, 127, 0.1);
}

[data-theme="dark"] .new-chat-btn {
  border-color: var(--dark-border);
}

[data-theme="dark"] .new-chat-btn:hover {
  background: linear-gradient(135deg, rgba(16, 163, 127, 0.12), rgba(13, 138, 106, 0.08));
  border-color: var(--primary);
  box-shadow: 0 4px 12px rgba(16, 163, 127, 0.2);
}

.new-chat-btn svg {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.new-chat-btn:hover svg {
  transform: rotate(90deg) scale(1.1);
}

/* 搜索框 */
.sidebar-search {
  padding: 12px;
  flex-shrink: 0;
  flex-grow: 0;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: 8px;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  /* 硬件加速 */
  will-change: border-color, box-shadow;
  transform: translateZ(0);
}

.search-box:focus-within {
  border-color: var(--border-medium);
  box-shadow: 0 0 0 3px rgba(16, 163, 127, 0.1);
  transform: translateY(-1px);
}

[data-theme="dark"] .search-box {
  background: var(--dark-bg-secondary);
  border-color: var(--dark-border);
}

[data-theme="dark"] .search-box:focus-within {
  border-color: var(--dark-text-tertiary);
}

.search-box svg {
  flex-shrink: 0;
  color: var(--text-tertiary);
  width: 16px;
  height: 16px;
}

.search-box input {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
}

[data-theme="dark"] .search-box input {
  color: var(--dark-text-primary) !important;
}

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

[data-theme="dark"] .search-box input::placeholder {
  color: var(--dark-text-tertiary) !important; /* 确保占位符可见 */
}

/* 历史记录 */
.sidebar-history {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 8px;
  min-height: 0;
  /* 平滑滚动 */
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  /* 确保滚动区域正常 */
  max-height: 100%;
  /* 优化滚动性能 */
  overscroll-behavior-y: contain;
  /* 确保内容不会溢出 */
  position: relative;
  z-index: 1;
  /* 关键：确保 flex 项目可以正确收缩 */
  height: 0;
}

/* 优化滚动条性能 */
.chat-wrapper::-webkit-scrollbar {
  width: 8px;
}

.chat-wrapper::-webkit-scrollbar-track {
  background: transparent;
}

.chat-wrapper::-webkit-scrollbar-thumb {
  background: var(--border-medium);
  border-radius: 4px;
  transition: background 0.3s ease;
}

.chat-wrapper::-webkit-scrollbar-thumb:hover {
  background: var(--text-tertiary);
}

/* 深色模式滚动条 */
[data-theme="dark"] .chat-wrapper::-webkit-scrollbar-thumb {
  background: var(--border-medium);
}

[data-theme="dark"] .chat-wrapper::-webkit-scrollbar-thumb:hover {
  background: var(--dark-text-secondary);
}

/* 侧边栏滚动条 */
.sidebar-history::-webkit-scrollbar {
  width: 6px;
}

.sidebar-history::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar-history::-webkit-scrollbar-thumb {
  background: var(--border-medium);
  border-radius: 3px;
  transition: background 0.2s;
}

.sidebar-history::-webkit-scrollbar-thumb:hover {
  background: var(--text-tertiary);
}

.history-section {
  margin-bottom: 16px;
  /* 硬件加速 */
  will-change: auto;
  transform: translateZ(0);
  /* 确保宽度正确 */
  width: 100%;
  display: block;
}

/* 对话组样式 */
.conversation-group {
  margin-bottom: 16px;
  /* 防止内容溢出 */
  overflow: hidden;
  /* 确保不会被截断 */
  page-break-inside: avoid;
  break-inside: avoid;
}

.conversation-date {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-tertiary);
  margin-bottom: 8px;
  padding: 4px 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

[data-theme="dark"] .conversation-date {
  color: var(--dark-text-tertiary);
}

/* 对话列表容器 */
.conversations-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* 对话预览卡片容器 */
.conversation-card-wrapper {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-10px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* 对话预览卡片 */
.conversation-preview {
  flex: 1;
  padding: 12px 14px;
  background: var(--bg-secondary);
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid transparent;
  position: relative;
  overflow: hidden;
}

.conversation-preview::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(16, 163, 127, 0.05) 0%, transparent 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.conversation-preview:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-medium);
  transform: translateX(2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.conversation-preview:hover::before {
  opacity: 1;
}

.conversation-preview:active {
  transform: scale(0.98);
}

[data-theme="dark"] .conversation-preview:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* 用户消息预览 */
.conversation-preview > div:first-child {
  font-size: 14px;
  color: var(--text-primary);
  font-weight: 500;
  margin-bottom: 6px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 100%;
  position: relative;
  z-index: 1;
}

/* AI 回复预览 */
.conversation-preview > div:last-child {
  font-size: 13px;
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 100%;
  position: relative;
  z-index: 1;
}

/* 删除按钮 */
.delete-conversation-btn {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: 1px solid var(--border-light);
  background: rgba(255, 255, 255, 0.5);
  color: var(--text-tertiary);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  flex-shrink: 0;
  opacity: 0;
  transform: translateX(5px);
  backdrop-filter: blur(4px);
  position: relative;
}

/* 鼠标悬停整个卡片时显示删除按钮 */
.conversation-card-wrapper:hover .delete-conversation-btn {
  opacity: 0.6;
  transform: translateX(0);
}

.delete-conversation-btn:hover {
  background: linear-gradient(135deg, #ff4444 0%, #ff6b6b 100%);
  border-color: #ff4444;
  color: #ffffff;
  opacity: 1 !important;
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(255, 68, 68, 0.3);
}

.delete-conversation-btn:active {
  transform: scale(0.95);
}

/* 删除按钮工具提示 */
.delete-conversation-btn::after {
  content: attr(title);
  position: absolute;
  right: 100%;
  top: 50%;
  transform: translateY(-50%) translateX(-5px);
  background: var(--text-primary);
  color: var(--bg-primary);
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 12px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: all 0.2s ease;
  z-index: 1000;
}

.delete-conversation-btn:hover::after {
  opacity: 1;
  transform: translateY(-50%) translateX(-8px);
}

[data-theme="dark"] .delete-conversation-btn {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--border-medium);
}

[data-theme="dark"] .delete-conversation-btn:hover {
  background: linear-gradient(135deg, #ff4444 0%, #ff6b6b 100%);
  box-shadow: 0 4px 12px rgba(255, 68, 68, 0.4);
}

/* 日期分组容器 */
.date-group-container {
  margin-bottom: 24px;
  animation: fadeIn 0.4s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 日期标题 */
.date-group-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-tertiary);
  margin-bottom: 12px;
  padding: 6px 12px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  display: inline-block;
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
  border-radius: 8px;
  border: 1px solid var(--border-light);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
}

.date-group-title:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] .date-group-title {
  background: linear-gradient(135deg, var(--dark-bg-tertiary) 0%, var(--dark-bg-secondary) 100%);
  border-color: var(--dark-border);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  color: var(--dark-text-tertiary) !important;
}

[data-theme="dark"] .date-group-title:hover {
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.history-section-title {
  padding: 8px 12px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

[data-theme="dark"] .history-section-title {
  color: var(--dark-text-tertiary);
}

.history-item {
  padding: 10px 12px;
  margin-bottom: 4px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  font-size: 14px;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: flex;
  align-items: center;
  gap: 8px;
  /* 硬件加速 */
  will-change: background, transform;
  transform: translateZ(0);
  border: 1px solid transparent;
}

[data-theme="dark"] .history-item {
  color: var(--dark-text-primary) !important;
}

.history-item:hover {
  background: var(--bg-secondary);
  transform: translateX(2px);
  border-color: var(--border-light);
}

[data-theme="dark"] .history-item:hover {
  background: var(--dark-bg-tertiary);
  border-color: var(--dark-border-light);
}

.history-item-icon {
  flex-shrink: 0;
  font-size: 14px;
}

/* 侧边栏底部 */
.sidebar-bottom {
  padding: 12px;
  border-top: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex-shrink: 0;
  flex-grow: 0;
}

[data-theme="dark"] .sidebar-bottom {
  border-top-color: var(--dark-border);
}

.sidebar-bottom-btn {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  background: transparent;
  border: none;
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  text-align: left;
  /* 硬件加速 */
  will-change: background, transform;
  transform: translateZ(0);
}

[data-theme="dark"] .sidebar-bottom-btn {
  color: var(--dark-text-primary) !important;
}

.sidebar-bottom-btn:hover {
  background: var(--bg-secondary);
  transform: translateX(2px);
}

[data-theme="dark"] .sidebar-bottom-btn:hover {
  background: var(--dark-bg-secondary);
}

.sidebar-bottom-btn svg {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
}

/* 用户信息 */
.user-info {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  margin-top: 8px;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s;
}

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

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, #10a37f, #0d8a6a);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 14px;
  flex-shrink: 0;
}

.user-name {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
}

[data-theme="dark"] .user-name {
  color: var(--dark-text-primary) !important;
}

/* ===== 主内容区 ===== */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%; /* 使用 100% 而不是 100vh，与父容器保持一致 */
  overflow: hidden;
  position: relative;
  /* 关键修复：确保 flex 布局正确 */
  min-height: 0;
  /* 硬件加速 */
  will-change: auto;
  transform: translateZ(0);
}

/* 顶部模型选择 */
.model-header {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  padding: 12px;
  z-index: 100;
  pointer-events: none;
  /* 确保不遮挡菜单按钮 */
  max-width: calc(100% - 120px);
}

.model-selector-container {
  pointer-events: auto;
  position: relative;
}

.model-header select {
  padding: 10px 42px 10px 18px;
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: 10px;
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%236e6e80'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 18px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  /* 硬件加速 */
  will-change: border-color, box-shadow, transform;
  transform: translateZ(0);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] .model-header select {
  color: var(--dark-text-primary) !important;
}

.model-header select:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(16, 163, 127, 0.15);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2310a37f'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
}

[data-theme="dark"] .model-header select {
  background: var(--dark-bg-primary);
  border-color: var(--dark-border);
}

.model-header select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(16, 163, 127, 0.2);
  transform: translateY(0);
}

/* 模型选择器下拉动画 */
.model-header select option {
  padding: 10px 16px;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 14px;
}

[data-theme="dark"] .model-header select option {
  background: var(--dark-bg-primary);
  color: var(--dark-text-primary);
}

/* 聊天内容区 */
.chat-wrapper {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  /* 移除 center 对齐，让内容自然流动 */
  /* align-items: center; */
  /* justify-content: center; */
  padding-top: 60px;
  /* 关键修复：确保滚动容器正确工作 */
  min-height: 0;
  /* 平滑滚动 */
  scroll-behavior: smooth;
  /* iOS 惯性滚动 */
  -webkit-overflow-scrolling: touch;
  /* 防止滚动截停 */
  overscroll-behavior-y: contain;
  /* 硬件加速 */
  will-change: scroll-position;
  transform: translateZ(0);
}

.chat-container {
  width: 100%;
  max-width: 768px;
  padding: 80px 24px 160px;
  margin: 0 auto;
  /* 确保内容不会导致布局问题 */
  position: relative;
  /* 硬件加速 */
  will-change: auto;
  transform: translateZ(0);
}

/* 欢迎页面 */
.welcome-message {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 20px;
  /* 淡入动画 */
  animation: fadeInUp 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: opacity, transform;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 建议卡片滑入动画 */
@keyframes slideInCard {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.welcome-logo {
  margin-bottom: 32px;
  /* Logo 缩放动画 */
  animation: scaleIn 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
  will-change: transform;
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.welcome-logo-img {
  width: 72px;
  height: 72px;
  object-fit: contain;
}

.welcome-message h2 {
  font-size: 32px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}

.welcome-message p {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

[data-theme="dark"] .welcome-message h2 {
  color: var(--dark-text-primary) !important;
}

[data-theme="dark"] .welcome-message p {
  color: var(--dark-text-secondary);
}

[data-theme="dark"] .suggestion-text {
  color: var(--dark-text-primary) !important;
}

/* 建议卡片 */
.suggestion-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
}

.suggestion-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  padding: 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  text-align: left;
  /* 硬件加速 */
  will-change: background, transform, box-shadow;
  transform: translateZ(0);
  /* 卡片依次淡入 */
  animation: fadeInUp 0.4s cubic-bezier(0.4, 0, 0.2, 1) backwards;
  position: relative;
  overflow: hidden;
}

/* 建议卡片的涟漪效果 */
.suggestion-card::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(16, 163, 127, 0.08);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.suggestion-card:hover::before {
  width: 300px;
  height: 300px;
}

.suggestion-card:nth-child(1) { animation-delay: 0.1s; }
.suggestion-card:nth-child(2) { animation-delay: 0.15s; }
.suggestion-card:nth-child(3) { animation-delay: 0.2s; }
.suggestion-card:nth-child(4) { animation-delay: 0.25s; }

.suggestion-card:hover {
  background: linear-gradient(135deg, rgba(16, 163, 127, 0.06), rgba(13, 138, 106, 0.04));
  border-color: var(--primary);
  box-shadow: 0 8px 24px rgba(16, 163, 127, 0.15);
  transform: translateY(-4px) scale(1.03);
}

[data-theme="dark"] .suggestion-card {
  background: var(--dark-bg-secondary);
  border-color: var(--dark-border-light);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .suggestion-card:hover {
  background: linear-gradient(135deg, rgba(16, 163, 127, 0.1), rgba(13, 138, 106, 0.08));
  border-color: var(--primary);
  box-shadow: 0 8px 24px rgba(16, 163, 127, 0.25);
}

.suggestion-icon {
  font-size: 24px;
  margin-bottom: 4px;
}

[data-theme="dark"] .suggestion-icon {
  color: var(--dark-text-primary) !important;
}

.suggestion-text {
  font-size: 14px;
  color: var(--text-primary);
  font-weight: 500;
}

[data-theme="dark"] .suggestion-text {
  color: var(--dark-text-primary) !important;
}

/* 输入区域 */
.input-container {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 24px 16px;
  background: linear-gradient(180deg, transparent, var(--bg-primary) 20%);
}

[data-theme="dark"] .input-container {
  background: linear-gradient(180deg, transparent, var(--dark-bg-primary) 20%);
}

.input-box-wrapper {
  max-width: 768px;
  margin: 0 auto;
}

.input-box {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 16px;
  padding: 12px 16px;
  box-shadow: 0 0 15px rgba(0,0,0,0.05);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  /* 硬件加速 */
  will-change: border-color, box-shadow, transform;
  transform: translateZ(0);
}

[data-theme="dark"] .input-box {
  background: var(--dark-input-bg);
  border-color: var(--dark-input-border);
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.2);
}

.input-box:focus-within {
  border-color: var(--border-medium);
  box-shadow: 0 0 0 3px rgba(16, 163, 127, 0.12), 0 4px 20px rgba(0, 0, 0, 0.08);
  transform: translateY(-1px);
}

[data-theme="dark"] .input-box:focus-within {
  box-shadow: 0 0 0 3px rgba(16, 163, 127, 0.15), 0 4px 20px rgba(0, 0, 0, 0.3);
}

#userInput {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--text-primary);
  font-size: 16px;
  line-height: 1.5;
  resize: none;
  max-height: 200px;
  min-height: 24px;
  padding: 4px 0;
  font-family: inherit;
}

#userInput:focus {
  outline: none;
}

#userInput::placeholder {
  color: var(--text-tertiary);
}

[data-theme="dark"] #userInput {
  color: var(--dark-text-primary) !important;
}

[data-theme="dark"] #userInput::placeholder {
  color: var(--dark-text-tertiary) !important;
}

/* 右侧按钮组 */
.input-actions {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-shrink: 0;
}

.icon-btn {
  padding: 8px;
  background: transparent;
  border: none;
  border-radius: 8px;
  color: var(--text-tertiary);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  align-items: center;
  justify-content: center;
  /* 硬件加速 */
  will-change: background, transform;
  transform: translateZ(0);
}

.icon-btn:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
  transform: scale(1.1);
}

.icon-btn:active {
  transform: scale(0.95);
}

[data-theme="dark"] .icon-btn {
  color: var(--dark-text-tertiary);
}

[data-theme="dark"] .icon-btn:hover {
  background: var(--dark-bg-tertiary);
  color: var(--dark-text-primary);
}

.send-btn {
  padding: 8px;
  background: var(--primary);
  border: none;
  border-radius: 10px;
  color: white;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  /* 硬件加速 */
  will-change: background, transform, box-shadow;
  transform: translateZ(0);
  position: relative;
  overflow: hidden;
}

.send-btn:hover {
  background: var(--primary-hover);
  transform: scale(1.08);
  box-shadow: 0 4px 12px rgba(16, 163, 127, 0.3);
}

.send-btn:hover::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.send-btn:active {
  transform: scale(0.95);
  box-shadow: 0 2px 6px rgba(16, 163, 127, 0.2);
}

.send-btn:active::after {
  width: 200px;
  height: 200px;
}

.send-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* 底部提示 */
.input-footer {
  max-width: 768px;
  margin: 12px auto 0;
  text-align: center;
}

.input-footer p {
  font-size: 12px;
  color: var(--text-tertiary);
  line-height: 1.5;
}

[data-theme="dark"] .input-footer p {
  color: var(--dark-text-tertiary);
}

/* 遮罩层 */
.overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.5);
  z-index: 999;
  opacity: 0;
  transition: opacity 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: opacity;
  transform: translateZ(0);
}

.overlay.active {
  display: block;
  opacity: 1;
}

/* 菜单按钮（默认隐藏 - 电脑端不需要） */
.menu-toggle {
  display: none;
  /* 确保在移动端可见 */
  background: var(--bg-primary) !important;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15) !important;
}

/* 关闭按钮（默认隐藏） */
.close-sidebar-btn {
  display: none;
  background: var(--bg-primary) !important;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15) !important;
}

/* 响应式设计 */
@media (max-width: 768px) {
  /* 确保菜单按钮不被遮挡 */
  body {
    overflow-x: hidden;
  }
  
  .main-content {
    padding-top: 60px; /* 为菜单按钮留出空间 */
  }
  
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    transform: translateX(-100%);
    box-shadow: 2px 0 12px rgba(0,0,0,0.1);
    width: 280px;
    max-width: 85vw;
    height: 100%; /* 使用 100% 而不是 100vh */
    max-height: 100%; /* 防止超出 */
  }
  
  .sidebar.open {
    transform: translateX(0);
  }
  
  [data-theme="dark"] .sidebar {
    box-shadow: 2px 0 12px rgba(0,0,0,0.3);
  }
  
  .suggestion-cards {
    grid-template-columns: 1fr;
  }
  
  /* 移动端菜单按钮 */
  .menu-toggle {
    display: flex !important;
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 2000; /* 确保在最上层 */
    padding: 10px;
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: 8px;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    /* 硬件加速 */
    will-change: background, transform, box-shadow;
    transform: translateZ(0);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
  }
  
  .menu-toggle:hover {
    background: var(--bg-secondary);
    transform: scale(1.08);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
  }
  
  .menu-toggle:active {
    transform: scale(0.95);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
  }
  
  /* 移动端关闭按钮 */
  .close-sidebar-btn {
    display: flex !important;
    position: fixed;
    top: 16px;
    right: 16px;
    z-index: 2000; /* 确保在最上层 */
    padding: 10px;
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: 8px;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    /* 硬件加速 */
    will-change: background, transform, box-shadow;
    transform: translateZ(0);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
  }
  
  .close-sidebar-btn:hover {
    background: var(--bg-secondary);
    transform: scale(1.08);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
  }
  
  .close-sidebar-btn:active {
    transform: scale(0.95);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
  }
  
  /* 移动端主内容区调整 */
  .main-content {
    padding-top: 60px;
  }
  
  /* 移动端模型选择器 */
  .model-header {
    padding: 12px 60px;
    /* 确保不遮挡菜单按钮 */
    justify-content: center;
  }
  
  /* 移动端聊天容器 */
  .chat-container {
    padding: 20px 16px 140px;
  }
  
  /* 移动端输入区域 */
  .input-container {
    padding: 16px 12px;
  }
  
  .input-box {
    padding: 10px 12px;
    border-radius: 12px;
  }
  
  /* 移动端输入框 */
  #userInput {
    font-size: 16px;
    max-height: 120px;
  }
  
  /* 移动端按钮组 */
  .input-actions {
    gap: 6px;
  }
  
  .icon-btn {
    padding: 6px;
  }
  
  .send-btn {
    padding: 6px;
  }
  
  /* 移动端消息样式 */
  .message {
    gap: 12px;
    padding: 16px 0;
  }
  
  .user-message {
    margin: 0 -16px;
    padding: 16px;
  }
  
  /* 移动端头像 */
  .message-avatar {
    width: 32px;
    height: 32px;
    font-size: 18px;
  }
  
  /* 移动端气泡 */
  .bubble {
    font-size: 15px;
  }
  
  /* 移动端欢迎消息 */
  .welcome-message h2 {
    font-size: 24px;
  }
  
  .welcome-logo-img {
    width: 56px;
    height: 56px;
  }
  
  /* 移动端深色模式适配 */
  [data-theme="dark"] .menu-toggle,
  [data-theme="dark"] .close-sidebar-btn {
    background: var(--dark-bg-primary);
    border-color: var(--dark-border);
  }
  
  [data-theme="dark"] .menu-toggle:hover,
  [data-theme="dark"] .close-sidebar-btn:hover {
    background: var(--dark-bg-secondary);
  }
}

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

::-webkit-scrollbar-track {
  background: transparent;
}

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

::-webkit-scrollbar-thumb:hover {
  background: var(--text-tertiary);
}

/* 消息样式 */
.message {
  display: flex;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border-light);
  /* 优化的淡入动画 */
  animation: fadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: opacity, transform;
  transform: translateZ(0);
}

[data-theme="dark"] .message {
  border-bottom-color: var(--dark-border);
}

.message:last-child {
  border-bottom: none;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(15px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.user-message {
  background: var(--bg-secondary);
  margin: 0 -24px;
  padding: 24px;
  border-radius: 12px;
}

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

[data-theme="dark"] .user-message .bubble {
  color: var(--dark-text-primary) !important;
}

.ai-message {
  background: var(--bg-primary);
}

[data-theme="dark"] .ai-message {
  background: var(--dark-bg-primary);
}

.message-avatar {
  width: 36px;
  height: 36px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 20px;
  background: linear-gradient(135deg, #10a37f, #0d8a6a);
  color: white !important;
}

.bubble {
  flex: 1;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  padding-top: 4px;
}

/* 思考过程显示（类似 DeepSeek） */
.thinking-block {
  background: var(--bg-secondary);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 16px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-secondary);
  animation: slideIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  border: 1px solid var(--border-light);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.thinking-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  font-weight: 500;
  color: var(--text-primary);
  font-size: 13px;
}

.thinking-icon {
  width: 18px;
  height: 18px;
  animation: pulse 1.5s ease-in-out infinite;
  color: var(--primary);
}

@keyframes pulse {
  0%, 100% { 
    opacity: 0.6; 
    transform: scale(1) rotate(0deg);
  }
  50% { 
    opacity: 1; 
    transform: scale(1.1) rotate(180deg);
  }
}

.thinking-content {
  color: var(--text-secondary);
  line-height: 1.7;
  padding-left: 28px;
  white-space: pre-wrap;
}

.thinking-toggle {
  position: absolute;
  top: 12px;
  right: 12px;
  background: transparent;
  border: none;
  color: var(--text-tertiary);
  cursor: pointer;
  padding: 6px;
  border-radius: 6px;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.thinking-toggle:hover {
  background: var(--bg-primary);
  color: var(--text-primary);
  transform: scale(1.05);
}

[data-theme="dark"] .thinking-block {
  background: var(--dark-bg-secondary);
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .thinking-header {
  color: var(--dark-text-primary);
}

[data-theme="dark"] .thinking-content {
  color: var(--dark-text-secondary);
}

[data-theme="dark"] .thinking-toggle:hover {
  background: var(--dark-bg-primary);
}

.bubble {
  overflow-wrap: break-word;
}

/* 深色模式下的文字颜色 */
[data-theme="dark"] .bubble {
  color: var(--dark-text-primary) !important;
}

[data-theme="dark"] .bubble h1,
[data-theme="dark"] .bubble h2,
[data-theme="dark"] .bubble h3,
[data-theme="dark"] .bubble h4,
[data-theme="dark"] .bubble h5,
[data-theme="dark"] .bubble h6 {
  color: var(--dark-text-primary) !important;
}

[data-theme="dark"] .bubble p {
  color: var(--dark-text-primary) !important;
}

[data-theme="dark"] .bubble li,
[data-theme="dark"] .bubble ul,
[data-theme="dark"] .bubble ol {
  color: var(--dark-text-primary) !important;
}

[data-theme="dark"] .bubble strong,
[data-theme="dark"] .bubble b {
  color: var(--dark-text-primary) !important;
}

[data-theme="dark"] .bubble em,
[data-theme="dark"] .bubble i {
  color: var(--dark-text-primary) !important;
}

[data-theme="dark"] .bubble a {
  color: var(--primary) !important;
  text-decoration: underline;
}

[data-theme="dark"] .bubble span {
  color: var(--dark-text-primary) !important;
}

[data-theme="dark"] .bubble div {
  color: var(--dark-text-primary) !important;
}

/* 性能指标显示 */
.perf-metrics {
  margin-top: 12px;
  padding: 8px 12px;
  background: var(--bg-secondary);
  border-radius: 8px;
  font-size: 12px;
  color: var(--text-tertiary);
  font-family: 'Söhne Mono', Monaco, monospace;
  border: 1px solid var(--border-light);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

[data-theme="dark"] .perf-metrics {
  background: var(--dark-bg-tertiary);
  border-color: var(--dark-border-light);
  color: var(--dark-text-tertiary);
}

.perf-metric-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

.perf-metric-label {
  font-weight: 500;
  opacity: 0.8;
}

.perf-metric-value {
  font-weight: 600;
  color: var(--primary);
}

[data-theme="dark"] .perf-metric-value {
  color: var(--primary) !important;
}

/* Markdown 元素 */
.bubble h1,
.bubble h2,
.bubble h3 {
  margin-top: 24px;
  margin-bottom: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

[data-theme="dark"] .bubble h1,
[data-theme="dark"] .bubble h2,
[data-theme="dark"] .bubble h3,
[data-theme="dark"] .bubble h4,
[data-theme="dark"] .bubble h5,
[data-theme="dark"] .bubble h6 {
  color: var(--dark-text-primary) !important;
}

.bubble h1 { font-size: 28px; }
.bubble h2 { font-size: 24px; }
.bubble h3 { font-size: 20px; }
.bubble h4 { font-size: 18px; }
.bubble h5 { font-size: 16px; }
.bubble h6 { font-size: 14px; }

.bubble p {
  margin-bottom: 16px;
  color: var(--text-primary);
}

[data-theme="dark"] .bubble p {
  color: var(--dark-text-primary) !important;
}

.bubble ul,
.bubble ol {
  margin: 16px 0;
  padding-left: 24px;
}

.bubble li {
  margin: 8px 0;
  color: var(--text-primary);
}

[data-theme="dark"] .bubble li {
  color: var(--dark-text-primary) !important;
}

.bubble a {
  color: var(--primary);
  text-decoration: none;
}

[data-theme="dark"] .bubble a {
  color: var(--primary) !important;
  text-decoration: underline;
}

.bubble a:hover {
  text-decoration: underline;
}

.inline-code {
  background: var(--bg-secondary);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'Söhne Mono', monospace;
  font-size: 14px;
  color: var(--text-primary);
  border: 1px solid var(--border-light);
}

[data-theme="dark"] .inline-code {
  background: var(--dark-bg-secondary);
  border-color: var(--dark-border);
  color: var(--dark-text-primary) !important;
}

.code-block {
  background: #0d0d0d; /* 更深的背景，与深色主题完美融合 */
  border-radius: 8px;
  padding: 0;
  margin: 16px 0;
  overflow-x: auto;
  font-family: 'Söhne Mono', Monaco, 'Andale Mono', 'Ubuntu Mono', monospace;
  font-size: 14px;
  line-height: 1.6;
  position: relative;
  border: 1px solid var(--dark-border-light);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.code-block pre {
  margin: 0;
  padding: 16px;
  overflow-x: auto;
}

.code-block code {
  color: #e5e5e5; /* 更高的对比度 */
  font-family: inherit;
  font-size: inherit;
  background: transparent;
  padding: 0;
}

[data-theme="dark"] .code-block {
  background: #0d0d0d;
  border-color: var(--dark-border-light);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .code-block code {
  color: #e5e5e5 !important; /* 确保高对比度 */
}

/* 代码语法高亮 */
.code-block .keyword {
  color: #ff79c6;
  font-weight: bold;
}

.code-block .string {
  color: #f1fa8c;
}

.code-block .comment {
  color: #9aa0aa; /* 提高对比度，更容易阅读 */
  font-style: italic;
}

.code-block .number {
  color: #bd93f9;
}

.code-block .function {
  color: #8be9fd;
}

.code-block .class {
  color: #50fa7b;
}

.code-block .operator {
  color: #ff79c6;
}

.code-block .parameter {
  color: #ffb86c;
}

.code-block .return {
  color: #ff79c6;
  font-weight: bold;
}

[data-theme="dark"] .code-block .keyword {
  color: #ff79c6 !important;
}

[data-theme="dark"] .code-block .string {
  color: #f1fa8c !important;
}

[data-theme="dark"] .code-block .comment {
  color: #9aa0aa !important;
}

[data-theme="dark"] .code-block .number {
  color: #bd93f9 !important;
}

[data-theme="dark"] .code-block .function {
  color: #8be9fd !important;
}

[data-theme="dark"] .code-block .class {
  color: #50fa7b !important;
}

[data-theme="dark"] .code-block .operator {
  color: #ff79c6 !important;
}

[data-theme="dark"] .code-block .parameter {
  color: #ffb86c !important;
}

[data-theme="dark"] .code-block .return {
  color: #ff79c6 !important;
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  background: rgba(255,255,255,0.03);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.code-lang {
  font-size: 12px;
  color: #a0a0a0;
  text-transform: uppercase;
  font-weight: 500;
}

[data-theme="dark"] .code-lang {
  color: #a0a0a0 !important;
}

.copy-code-btn,
.message-copy-btn {
  padding: 4px 10px;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 6px;
  color: #a5a5a5;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  font-weight: 500;
  /* 硬件加速 */
  will-change: background, transform;
  transform: translateZ(0);
  position: relative;
  overflow: hidden;
}

[data-theme="dark"] .copy-code-btn,
[data-theme="dark"] .message-copy-btn {
  color: #a5a5a5 !important;
  border-color: rgba(255,255,255,0.15);
}

.copy-code-btn:hover,
.message-copy-btn:hover {
  background: rgba(255,255,255,0.08);
  color: #f5f5f5;
  border-color: rgba(255,255,255,0.25);
  transform: scale(1.05);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.copy-code-btn:active,
.message-copy-btn:active {
  transform: scale(0.95);
}

.message-copy-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--bg-secondary);
  border-color: var(--border-light);
  color: var(--text-secondary);
  /* 默认隐藏，鼠标悬停时显示 */
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  /* 硬件加速 */
  will-change: opacity, transform, background;
  transform: translateZ(0);
}

/* 电脑端：鼠标悬停时显示复制按钮 */
@media (min-width: 769px) {
  .message:hover .message-copy-btn,
  .bubble:hover .message-copy-btn {
    opacity: 1;
    visibility: visible;
  }
}

/* 移动端：直接显示复制按钮 */
@media (max-width: 768px) {
  .message-copy-btn {
    opacity: 1;
    visibility: visible;
  }
}

[data-theme="dark"] .message-copy-btn {
  background: var(--dark-bg-tertiary);
  border-color: var(--dark-border-light);
  color: var(--dark-text-tertiary);
}

[data-theme="dark"] .message-copy-btn:hover {
  background: var(--dark-border);
  color: var(--dark-text-primary);
}

.markdown-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
}

.markdown-table th,
.markdown-table td {
  border: 1px solid var(--border-light);
  padding: 12px;
  text-align: left;
  color: var(--text-primary); /* 确保表格文字可见 */
}

[data-theme="dark"] .markdown-table th,
[data-theme="dark"] .markdown-table td {
  border-color: var(--dark-border);
  color: var(--dark-text-primary) !important; /* 确保深色模式下可见 */
}

.markdown-table th {
  background: var(--bg-secondary);
  font-weight: 600;
  color: var(--text-primary);
}

[data-theme="dark"] .markdown-table th {
  background: var(--dark-bg-secondary);
  color: var(--dark-text-primary) !important;
}

.markdown-table tr:nth-child(even) {
  background: var(--bg-primary);
}

[data-theme="dark"] .markdown-table tr:nth-child(even) {
  background: var(--dark-bg-primary);
}

.markdown-blockquote {
  border-left: 4px solid var(--primary);
  padding-left: 16px;
  margin: 16px 0;
  color: var(--text-secondary);
  font-style: italic;
  background: var(--bg-secondary);
  padding: 12px 16px;
  border-radius: 0 8px 8px 0;
}

[data-theme="dark"] .markdown-blockquote {
  background: var(--dark-bg-tertiary);
  color: var(--dark-text-secondary) !important;
  border-left-color: var(--primary);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* 功能按钮 */
.translate-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  margin-top: 12px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-5px);
  /* 硬件加速 */
  will-change: opacity, transform, background;
  transform: translateZ(0);
  /* 放在消息底部 */
  width: auto;
  max-width: 200px;
  justify-content: center;
  align-self: center;
  display: flex;
}

/* 电脑端：鼠标悬停时显示翻译按钮 */
@media (min-width: 769px) {
  .message:hover .translate-btn {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
}

/* 移动端：直接显示翻译按钮 */
@media (max-width: 768px) {
  .translate-btn {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
}

.translate-btn:hover {
  background: var(--bg-primary);
  border-color: var(--border-medium);
  color: var(--text-primary);
  transform: scale(1.02);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}

[data-theme="dark"] .translate-btn {
  background: var(--dark-bg-tertiary);
  border-color: var(--dark-border-light);
  color: var(--dark-text-secondary);
}

[data-theme="dark"] .translate-btn:hover {
  background: var(--dark-bg-secondary);
  border-color: var(--dark-border);
  color: var(--dark-text-primary);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

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

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

/* 确认对话框（类似 DeepSeek） */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  backdrop-filter: blur(4px);
  animation: modalFadeIn 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] .modal-overlay {
  background: rgba(0, 0, 0, 0.75);
}

@keyframes modalFadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(-20px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

/* 模型切换提示 */
.model-switch-toast {
  position: fixed;
  top: 70px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: 12px;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  z-index: 10000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform, opacity, visibility;
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 500;
}

.model-switch-toast svg {
  color: var(--primary);
  flex-shrink: 0;
}

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

[data-theme="dark"] .model-switch-toast {
  background: var(--dark-bg-primary);
  border-color: var(--dark-border);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

/* 网站内通知 */
.in-app-notification {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: 12px;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  z-index: 10001;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform, opacity, visibility;
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 500;
  max-width: 90%;
}

.in-app-notification svg {
  color: var(--primary);
  flex-shrink: 0;
}

.in-app-notification.show {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

[data-theme="dark"] .in-app-notification {
  background: var(--dark-bg-primary);
  border-color: var(--dark-border);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.modal-content {
  background: var(--bg-primary);
  border-radius: 16px;
  padding: 32px;
  max-width: 400px;
  width: 90%;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.2);
  text-align: center;
  transform: translateZ(0);
  will-change: transform, opacity;
  border: 1px solid var(--border-light);
}

[data-theme="dark"] .modal-content {
  background: var(--dark-bg-primary);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
  border-color: var(--dark-border-light);
}

.modal-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  background: rgba(16, 163, 127, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
}

[data-theme="dark"] .modal-icon {
  background: rgba(16, 163, 127, 0.2);
}

.modal-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
}

[data-theme="dark"] .modal-title {
  color: var(--dark-text-primary) !important;
}

.modal-description {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.6;
}

[data-theme="dark"] .modal-description {
  color: var(--dark-text-secondary) !important;
}

.modal-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
}

.modal-btn {
  padding: 10px 24px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  border: none;
  min-width: 80px;
}

.modal-btn-cancel {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-light);
}

.modal-btn-cancel:hover {
  background: var(--bg-tertiary);
  transform: translateY(-1px);
  border-color: var(--border-medium);
}

[data-theme="dark"] .modal-btn-cancel {
  background: var(--dark-bg-tertiary);
  color: var(--dark-text-primary) !important;
  border-color: var(--dark-border-light);
}

[data-theme="dark"] .modal-btn-cancel:hover {
  background: var(--dark-bg-secondary);
  border-color: var(--dark-border);
}

.modal-btn-confirm {
  background: var(--primary);
  color: white;
}

.modal-btn-confirm:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(16, 163, 127, 0.3);
}