/**
 * 高级 Apple 风格重构
 * 强调通透性、精致间距与流畅动效
 */

/* 基础重置 */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
  outline: none;
}

html, body {
  height: 100vh;
  height: 100dvh;
  height: -webkit-fill-available;
  overflow: hidden;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Icons", "Helvetica Neue", Helvetica, Arial, sans-serif;
  background-color: var(--bg-app);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

#app {
  height: 100%;
  display: flex;
  flex-direction: column;
}

.hidden {
  display: none !important;
}

/* 侧边栏遮罩 */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(8px);
  z-index: 100;
}

.main-app {
  display: flex;
  height: 100vh;
  height: 100dvh;
  height: -webkit-fill-available;
  overflow: hidden;
}

/* 侧边栏 - 苹果玻璃感 */
.sidebar {
  width: 260px;
  height: 100%;
  background: var(--bg-sidebar);
  backdrop-filter: var(--blur-std);
  -webkit-backdrop-filter: var(--blur-std);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  z-index: 200;
  transition: transform var(--dur-normal) var(--ease-standard),
              width var(--dur-normal) var(--ease-standard),
              margin-left var(--dur-normal) var(--ease-standard);
}

.sidebar.collapsed {
  margin-left: -260px;
}

.sidebar-header {
  padding: 1.2rem 0.75rem;
}

.new-chat-btn {
  width: 100%;
  padding: 0.7rem 1.2rem;
  background: var(--brand-blue);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.9rem;
  box-shadow: 0 4px 12px rgba(0, 113, 227, 0.2);
  transition: all var(--dur-fast) var(--ease-standard);
}

.new-chat-btn:hover {
  background: var(--brand-blue-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(0, 113, 227, 0.4);
}

.new-chat-btn:active {
  transform: scale(0.97);
}

.new-chat-btn svg,
.new-chat-btn .icon-svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.sidebar-search {
  padding: 0 1rem 1rem;
}

.sidebar-search input {
  width: 100%;
  padding: 0.6rem 0.8rem;
  background: var(--bg-hover);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.9rem;
  transition: all var(--dur-fast);
}

.sidebar-search input:focus {
  background: var(--bg-input);
  border-color: var(--brand-blue);
}

.sidebar-sessions {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 0.5rem;
}

/* 侧边栏底部 */
.sidebar-footer {
  padding: 1rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.submit-knowledge-btn {
  width: 100%;
  padding: 0.6rem 1rem;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.85rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: all var(--dur-fast);
}

.submit-knowledge-btn:hover {
  background: rgba(0, 113, 227, 0.1);
  border-color: var(--brand-blue);
  color: var(--brand-blue);
}

.submit-knowledge-btn:active {
  transform: scale(0.98);
}

.pending-count {
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-tertiary);
  padding: 0.25rem 0;
}

.clear-history-btn {
  width: 100%;
  padding: 0.6rem 1rem;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.85rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: all var(--dur-fast);
}

.clear-history-btn:hover {
  background: rgba(255, 59, 48, 0.1);
  border-color: #ff3b30;
  color: #ff3b30;
}

.clear-history-btn:active {
  transform: scale(0.98);
}

/* 自定义滚动条 - 苹果风格 */
::-webkit-scrollbar {
  width: 5px;
  height: 5px;
}

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

::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.1);
  border-radius: 10px;
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
}

.session-item {
  padding: 0.7rem 0.8rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 2px;
  font-size: 0.9rem;
  color: var(--text-primary);
  transition: all var(--dur-fast);
  position: relative;
  overflow: hidden;
}

.session-title {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  padding-right: 20px; /* 为删除按钮留位 */
}

.session-delete {
  position: absolute;
  right: 0.5rem;
  padding: 4px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  opacity: 0;
  transition: all var(--dur-fast);
  cursor: pointer;
  font-size: 0.75rem;
}

.session-item:hover .session-delete {
  opacity: 0.6;
}

.session-delete:hover {
  opacity: 1;
  color: #ff3b30;
}

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

.session-item.active {
  background: var(--bg-active);
  font-weight: 500;
}

/* 主内容区 */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 0;
  min-width: 0;
  background: var(--bg-content);
  position: relative;
  overflow: hidden;
}

/* 顶部栏 - 悬浮透明感 */
.header {
  height: 52px;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-glass);
  backdrop-filter: var(--blur-std);
  -webkit-backdrop-filter: var(--blur-std);
  border-bottom: 1px solid var(--border-color);
  z-index: 300;
  flex-shrink: 0;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

#collapse-toggle {
  display: flex !important;
}

#menu-btn {
  display: none !important;
}

.collapse-toggle, .menu-btn {
  padding: 6px;
  border-radius: 6px;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--dur-fast);
}

.collapse-toggle:hover, .menu-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.header-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.header-logo {
  width: 22px;
  height: 22px;
  object-fit: contain;
  /* 移除 filter 还原彩色 */
}

/* 顶部栏右侧按钮 */
.theme-toggle {
  padding: 6px 10px;
  border-radius: 8px;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  transition: all var(--dur-fast);
}

.theme-toggle:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

/* Header 右侧布局 */
.header-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* 聊天区域 */
.chat-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
  position: relative;
  background-color: var(--bg-content);
}

/* 滚动到底部按钮 */
.scroll-bottom-btn {
  position: absolute;
  bottom: 15px;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--bg-glass);
  backdrop-filter: var(--blur-std);
  -webkit-backdrop-filter: var(--blur-std);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--dur-fast);
  z-index: 100;
}

.scroll-bottom-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  transform: translateX(-50%) translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
}

.welcome-message {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding-bottom: 10vh;
  text-align: center;
  padding-left: 1rem;
  padding-right: 1rem;
}

.welcome-message h2 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.welcome-message p {
  font-size: 1rem;
  color: var(--text-secondary);
}

.welcome-message .version-tag {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.25rem 0.6rem;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-hover);
  border-radius: var(--radius-full);
  letter-spacing: 0.02em;
}

.welcome-logo {
  width: 72px;
  height: 72px;
  margin-bottom: 1.5rem;
  object-fit: contain;
  /* 移除 filter 还原彩色 */
}

/* 消息气泡 - 精致阴影与圆角 */
.message {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 95%;
  animation: message-in var(--dur-normal) var(--ease-standard);
}

@keyframes message-in {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.message.assistant {
  align-self: flex-start;
}

.message.user {
  align-self: flex-end;
}

.message-avatar {
  display: none;  /* 隐藏头像 */
}

/* 头像已隐藏，保留样式定义以备将来使用 */

.message-content {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.message-text {
  padding: 0.8rem 1.1rem;
  border-radius: var(--radius-lg);
  font-size: 0.95rem;
  line-height: 1.6;
  position: relative;
  box-shadow: var(--shadow-sm);
  word-wrap: break-word;
  overflow-wrap: break-word;
  word-break: break-word;
}

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

.message.user .message-text {
  background: var(--bg-bubble-user);
  color: var(--text-bubble-user);
  box-shadow: 0 4px 12px rgba(0, 113, 227, 0.2);
}

/* 输入区域 - 苹果悬浮输入框 */
.input-container {
  padding: 1rem 1.5rem 2rem;
  background: transparent;
  flex-shrink: 0;
  z-index: 300;
}

.input-wrapper {
  max-width: 95%;
  margin: 0 auto;
  display: flex;
  align-items: flex-end;
  gap: 0.6rem;
  background: var(--bg-input);
  backdrop-filter: var(--blur-std);
  -webkit-backdrop-filter: var(--blur-std);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 0.6rem 0.8rem;
  box-shadow: var(--shadow-md);
  transition: all var(--dur-fast);
}

.input-wrapper:focus-within {
  border-color: var(--brand-blue);
  box-shadow: 0 0 0 4px var(--brand-blue-light);
}

#message-input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  color: var(--text-primary);
  font-size: 1rem;
  padding: 0.5rem 0.4rem;
  max-height: 180px;
  resize: none;
  font-family: inherit;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none; /* Firefox */
  -ms-overflow-style: none; /* IE/Edge */
}

#message-input::-webkit-scrollbar {
  width: 0;
  height: 0;
  display: none;
}

.send-btn, .stop-btn {
  height: 40px;
  padding: 0 20px;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--dur-fast);
  background: var(--brand-blue);
  color: white;
  flex-shrink: 0;
  font-size: 0.95rem;
  font-weight: 500;
}

.send-btn:disabled {
  background: var(--bg-hover);
  color: var(--text-secondary);
  cursor: not-allowed;
}

/* Toast 通知 - 苹果灵动岛风格 */
.toast-container {
  position: fixed;
  top: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2200;
}

.toast {
  width: fit-content;
  max-width: 80vw;
  padding: 0.6rem 1.25rem;
  background: var(--bg-glass);
  backdrop-filter: var(--blur-std);
  -webkit-backdrop-filter: var(--blur-std);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  animation: toast-in var(--dur-normal) var(--ease-standard);
}

@keyframes toast-in {
  from { opacity: 0; transform: translateY(-12px) scale(0.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* 加载界面 */
.loading-screen {
  position: fixed;
  inset: 0;
  background: var(--bg-app);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 3000;
}

.loading-logo-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.loading-logo-img {
  width: 64px;
  height: 64px;
  animation: apple-pulse 2s infinite ease-in-out;
}

/* 加载进度条 */
.loading-progress {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.progress-bar {
  width: 200px;
  height: 4px;
  background: var(--bg-hover);
  border-radius: 2px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: var(--brand-blue);
  border-radius: 2px;
  transition: width 0.3s ease;
}

.progress-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-align: center;
}

@keyframes apple-pulse {
  0% { transform: scale(1); opacity: 0.8; }
  50% { transform: scale(1.05); opacity: 1; }
  100% { transform: scale(1); opacity: 0.8; }
}

/* Modal - 苹果居中弹窗 */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  animation: fade-in var(--dur-fast) var(--ease-standard);
}

/* 确认弹窗需要在其他弹窗之上 */
#confirm-modal {
  z-index: 2100;
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-content {
  background: var(--bg-glass);
  backdrop-filter: var(--blur-std);
  -webkit-backdrop-filter: var(--blur-std);
  padding: 1.5rem;
  border-radius: 20px;
  width: 90%;
  max-width: 320px;
  text-align: center;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  animation: scale-up var(--dur-normal) cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes scale-up {
  from { transform: scale(0.9); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

#confirm-message {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.modal-actions {
  display: flex;
  gap: 0.75rem;
}

.btn-cancel, .btn-confirm {
  flex: 1;
  padding: 0.75rem;
  border-radius: 12px;
  border: none;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-cancel {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.btn-confirm {
  background: #ff3b30; /* Apple Red */
  color: white;
}

.btn-cancel:hover, .btn-confirm:hover {
  opacity: 0.8;
}

.btn-cancel:active, .btn-confirm:active {
  transform: scale(0.96);
}

/* 提交新知识弹窗样式 */
.knowledge-modal-content {
  max-width: 600px;
  text-align: left;
}

.modal-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.knowledge-content-input {
  width: 100%;
  min-height: 200px;
  max-height: 60vh;
  padding: 1rem;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: inherit;
  line-height: 1.6;
  resize: vertical;
  overflow-y: auto;
  transition: all var(--dur-fast);
  margin-bottom: 1.5rem;
}

.knowledge-content-input:focus {
  outline: none;
  border-color: var(--brand-blue);
  background: var(--bg-glass);
}

.knowledge-content-input::placeholder {
  color: var(--text-tertiary);
}

.message-text h1, .message-text h2, .message-text h3 {
  margin: 1.2rem 0 0.6rem;
  color: var(--text-primary);
  line-height: 1.3;
  list-style: none;
}

.message-text h1 {
  font-size: 1.4rem;
  font-weight: 700;
}

.message-text h2 {
  font-size: 1.2rem;
  font-weight: 600;
}

.message-text h3 {
  font-size: 1.05rem;
  font-weight: 600;
}

.message-text p {
  margin-bottom: 0.8rem;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.message-text p:last-child {
  margin-bottom: 0;
}

/* 列表样式 */
.message-text ul, .message-text ol {
  margin: 0.8rem 0;
  padding-left: 1.5rem;
}

.message-text ul {
  list-style-type: none;
  padding-left: 0;
}

.message-text ol {
  list-style-type: decimal;
}

.message-text li {
  margin-bottom: 0.4rem;
  line-height: 1.6;
}

.message-text li::marker {
  color: var(--text-secondary);
}

/* 内联代码 */
.message-text code:not([class*="language-"]) {
  background: var(--bg-hover);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-family: SFMono-Regular, Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 0.88em;
  color: var(--brand-blue);
}

/* 引用块 */
.message-text blockquote {
  margin: 1rem 0;
  padding: 0.8rem 1rem;
  border-left: 3px solid var(--brand-blue);
  background: var(--bg-hover);
  border-radius: 0 8px 8px 0;
  color: var(--text-secondary);
}

.message-text blockquote p {
  margin: 0;
}

/* 分割线 */
.message-text hr {
  border: none;
  height: 1px;
  background: var(--border-color);
  margin: 1.5rem 0;
}

/* 链接 */
.message-text a {
  color: var(--brand-blue);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}

.message-text a:hover {
  border-bottom-color: var(--brand-blue);
}

/* 粗体/斜体 */
.message-text strong, .message-text b {
  font-weight: 600;
  color: var(--text-primary);
}

.message-text em, .message-text i {
  font-style: italic;
}

.message-text pre {
  margin: 1rem 0;
  border-radius: 12px;
  background: #1e1e1e !important;
  border: 1px solid rgba(255, 255, 255, 0.1);
  max-width: 100%;
  overflow-x: auto;
}

/* 代码块响应式 */
.code-block {
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.code-block pre {
  max-width: 100%;
  overflow-x: auto;
}

.code-block code {
  white-space: pre;
  word-wrap: normal;
}

.code-header {
  padding: 0.5rem 1rem;
  background: rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.copy-code-btn {
  font-size: 0.7rem;
  color: #8e8e93;
  flex-shrink: 0;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  padding: 3px 8px;
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: all 0.2s;
}

.copy-code-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #ffffff;
}

.message-text img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  margin: 0.5rem 0;
  box-shadow: var(--shadow-sm);
}

.message-text table {
  display: block;
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  background: var(--bg-hover);
  border-radius: 10px;
  border: none;
  margin: 1rem 0;
}

.message-text th,
.message-text td {
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--border-color);
  text-align: left;
}

.message-text th {
  background: rgba(0, 0, 0, 0.03);
  font-weight: 600;
}

.message-text td {
  background: transparent;
}

[data-theme="dark"] .message-text th {
  background: rgba(255, 255, 255, 0.05);
}

.source-tag {
  background: var(--bg-hover);
  border: none;
  border-radius: 6px;
  color: var(--brand-blue);
  font-weight: 500;
}

/* 消息操作按钮 */
.message-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 6px;
}

.message-actions .copy-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  padding: 0;
  border-radius: 6px;
  transition: all 0.2s;
}

.message-actions .copy-btn svg {
  width: 18px;
  height: 18px;
}

.message-actions .copy-btn:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
}

/* ========================================
   响应式断点系统
   ======================================== */

/* 平板端适配 (768px - 1024px) */
@media (min-width: 768px) and (max-width: 1024px) {
  .chat-messages {
    max-width: 90%;
    padding: 1.5rem 1rem;
  }
  
  .input-wrapper {
    max-width: 95%;
  }
  
  .sidebar {
    width: 240px;
  }
  
  .sidebar.collapsed {
    margin-left: -240px;
  }
  
  .message {
    max-width: 95%;
  }
  
  .header {
    padding: 0 1rem;
  }
}

/* 桌面端适配 (1024px - 1440px) */
@media (min-width: 1024px) and (max-width: 1440px) {
  .chat-messages {
    max-width: 80%;
  }
  
  .input-wrapper {
    max-width: 95%;
  }
  
  .message {
    max-width: 95%;
  }
}

/* 大屏幕适配 (1440px - 1920px) */
@media (min-width: 1440px) and (max-width: 1920px) {
  .chat-messages {
    max-width: 1000px;
  }
  
  .input-wrapper {
    max-width: 95%;
  }
  
  .sidebar {
    width: 280px;
  }
  
  .sidebar.collapsed {
    margin-left: -280px;
  }
  
  .message {
    max-width: 95%;
  }
}

/* 超大屏幕适配 (>1920px) */
@media (min-width: 1920px) {
  .chat-messages {
    max-width: 1200px;
  }
  
  .input-wrapper {
    max-width: 95%;
  }
  
  .sidebar {
    width: 320px;
  }
  
  .sidebar.collapsed {
    margin-left: -320px;
  }
  
  .message {
    max-width: 95%;
  }
  
  .welcome-logo {
    width: 88px;
    height: 88px;
  }
  
  .welcome-message h2 {
    font-size: 1.75rem;
  }
}

/* 搜索关键词标签 */
.message-keywords {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.8rem;
  padding: 0.5rem 0.75rem;
  background: var(--bg-hover);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  color: var(--text-muted);
  opacity: 0.85;
  transition: opacity var(--dur-fast) var(--ease-standard);
}

.message-keywords:hover {
  opacity: 1;
}

.message-keywords .keywords-icon {
  font-size: 0.7rem;
  opacity: 0.7;
}

.message-keywords .keywords-label {
  color: var(--text-secondary);
  font-weight: 500;
  white-space: nowrap;
}

.message-keywords .keywords-list {
  color: var(--brand-blue);
  word-break: break-all;
}

/* ========================================
   待更新知识列表弹窗样式
   ======================================== */

.pending-list-modal-content {
  max-width: 600px;
  width: 90%;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  text-align: left;
  padding: 0;
}

.pending-list-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}

.pending-list-header .modal-title {
  margin: 0;
}

.pending-list-close {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-hover);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--dur-fast);
}

.pending-list-close:hover {
  background: var(--bg-active);
  color: var(--text-primary);
}

.pending-list-container {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 1rem;
}

/* 加载状态 */
.pending-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem 1rem;
  color: var(--text-secondary);
  gap: 1rem;
}

.pending-loading-spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--border-color);
  border-top-color: var(--brand-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* 空列表状态 */
.pending-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem 1rem;
  color: var(--text-tertiary);
  text-align: center;
}

.pending-empty-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
  opacity: 0.5;
}

.pending-empty-text {
  font-size: 0.95rem;
}

/* 列表项 */
.pending-item {
  background: var(--bg-hover);
  border-radius: var(--radius-md);
  margin-bottom: 0.75rem;
  overflow: hidden;
  transition: all var(--dur-fast);
}

.pending-item:last-child {
  margin-bottom: 0;
}

.pending-item:hover {
  background: var(--bg-active);
}

.pending-item-main {
  padding: 1rem;
  cursor: pointer;
}

.pending-item-time {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.pending-item-content {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-primary);
  white-space: pre-wrap;
  word-break: break-word;
  /* 默认截断 3 行 */
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.pending-item.expanded .pending-item-content {
  -webkit-line-clamp: unset;
  overflow: visible;
}

.pending-item-expand-hint {
  font-size: 0.75rem;
  color: var(--brand-blue);
  margin-top: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.pending-item.expanded .pending-item-expand-hint .expand-text {
  display: none;
}

.pending-item:not(.expanded) .pending-item-expand-hint .collapse-text {
  display: none;
}

/* 操作按钮区 */
.pending-item-actions {
  display: flex;
  gap: 0.5rem;
  padding: 0 1rem 1rem;
}

.pending-action-btn {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all var(--dur-fast);
}

.pending-action-btn:hover {
  background: var(--bg-glass);
  color: var(--text-primary);
}

.pending-action-btn.copy-btn:hover {
  border-color: var(--brand-blue);
  color: var(--brand-blue);
}

.pending-action-btn.delete-btn:hover {
  border-color: #ff3b30;
  color: #ff3b30;
}

.pending-action-btn svg {
  width: 14px;
  height: 14px;
}

/* 待更新计数可点击样式 */
.pending-count.clickable {
  cursor: pointer;
  transition: all var(--dur-fast);
  padding: 0.4rem 0.75rem;
  margin: -0.15rem 0;
  border-radius: var(--radius-sm);
}

.pending-count.clickable:hover {
  background: var(--bg-hover);
  color: var(--brand-blue);
}

/* 移动端适配 */
@media (max-width: 768px) {
  .pending-list-modal-content {
    width: 95%;
    max-height: 85vh;
  }
  
  .pending-list-header {
    padding: 1rem;
  }
  
  .pending-list-container {
    padding: 0.75rem;
  }
  
  .pending-item-main {
    padding: 0.875rem;
  }
  
  .pending-item-actions {
    padding: 0 0.875rem 0.875rem;
  }
}

/* ========================================
   Chat 消息相关样式（从 chat.js 迁移）
   ======================================== */

/* 状态消息 */
.status-message {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0.5rem 1rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* 状态加载动画 */
.status-spinner {
  width: 14px;
  height: 14px;
  border: 2px solid var(--apple-gray-200, #e5e5e7);
  border-top-color: var(--brand-blue);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

/* 消息元信息 */
.message-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 4px;
  display: flex;
  align-items: center;
  gap: 8px;
  opacity: 0;
}

/* 消息来源区域 */
.message-sources {
  margin-top: 1rem;
  padding-top: 0.8rem;
  border-top: 1px dashed var(--border-color);
}

.message-sources-title {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.message-sources-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}