/* ============================================================
   Polish — 全局细节抛光层(最终加载,覆盖前面所有层)
   ………………………………………………………………………………………………………………………………
   目标:显示与交互「流水般顺畅」,Apple 官网式克制高级。
   原则:
   · 一套缓动贯穿全局:进入用 spring-out(0.32,0.72,0,1),
     退出更快更轻;一切动效可以被 prefers-reduced-motion 关掉
   · 弹窗/菜单/Toast 只有一次编排好的进出场,不叠加多套动画
   · 色彩仍走 redesign.css 的 token,这里只修「质感与节奏」
   ============================================================ */

/* ---------- 0. 全局动效 token ---------- */
:root {
  --ease-spring: cubic-bezier(0.32, 0.72, 0, 1);   /* Apple 式进入 */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);     /* 通用快出 */
  --ease-io: cubic-bezier(0.4, 0, 0.2, 1);
  --dur-1: 130ms;   /* hover / 按下 */
  --dur-2: 200ms;   /* 菜单 / 小浮层 */
  --dur-3: 320ms;   /* 弹窗 / 抽屉 */
  --dur-4: 460ms;   /* 大面积位移 */
}

/* 键盘可达性:聚焦环统一为 2px 主色,不做夸张光晕 */
:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--brand, var(--accent));
  outline-offset: 2px;
  border-radius: 4px;
  box-shadow: none;
}
/* redesign 的 3px 光环规则在本层收敛为更克制的描边 */
.chat-item:focus-visible,
button:focus-visible,
.icon-btn:focus-visible,
.menu-btn:focus-visible,
.msg-action:focus-visible,
.settings-tab:focus-visible,
[role="button"]:focus-visible {
  box-shadow: none;
}

/* 文本选中保持品牌色,但更轻 */
::selection {
  background: color-mix(in srgb, var(--brand, var(--accent)) 24%, transparent);
}

/* ---------- 1. 滚动体验:细滑、悬停浮现、不占布局 ---------- */
* { scrollbar-width: thin; scrollbar-color: transparent transparent; }
:hover { scrollbar-color: color-mix(in srgb, var(--text-tertiary) 45%, transparent) transparent; }
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: transparent;
  border-radius: 999px;
  border: 2px solid transparent;
  background-clip: padding-box;
}
*:hover::-webkit-scrollbar-thumb {
  background: color-mix(in srgb, var(--text-tertiary) 34%, transparent);
  background-clip: padding-box;
}
*:hover::-webkit-scrollbar-thumb:hover {
  background: color-mix(in srgb, var(--text-tertiary) 56%, transparent);
  background-clip: padding-box;
}
::-webkit-scrollbar-corner { background: transparent; }

/* 滚动吸附感:消息区滚动禁用 CSS 平滑(由 JS 控制流式跟滚),
   其余容器保留系统平滑 */
.chat-area { scroll-behavior: auto; }
html:not(.oc-streaming) .chat-area { scroll-behavior: smooth; }

/* ---------- 2. 弹窗:一次编排的进场 / 出场 ---------- */
/* 说明:redesign.css 曾用 !important 把弹窗锁成"永远可见"。
   这里用更晚加载的 !important 收口为:hidden 控制显隐,show 控制状态,
   进出场走 transition,流畅且不闪。 */
.modal-mask {
  opacity: 0 !important;
  pointer-events: none !important;
  display: flex !important;
  background: color-mix(in srgb, var(--bg-mask, rgba(0,0,0,0.4)) 88%, transparent);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  transition: opacity var(--dur-2) var(--ease-io);
}
.modal-mask.hidden { display: none !important; opacity: 0 !important; pointer-events: none !important; }
.modal-mask.show { opacity: 1 !important; pointer-events: auto !important; }
.modal-mask .modal {
  opacity: 0 !important;
  transform: translateY(14px) scale(0.965) !important;
  transition: opacity var(--dur-3) var(--ease-spring),
              transform var(--dur-3) var(--ease-spring);
  animation: none !important;
  will-change: transform, opacity;
}
.modal-mask.show .modal { opacity: 1 !important; transform: none !important; }

/* 弹窗圆角与阴影统一 */
.modal {
  border-radius: 18px;
  border: 1px solid var(--hairline);
  box-shadow: var(--shadow-lg);
}
.modal-sm { width: min(400px, 92vw); }
.modal-header { padding: 20px 22px 12px; }
.modal-body { padding: 4px 22px 24px; }
.modal-footer { padding: 4px 22px 22px; }

/* 确认弹窗按钮:主按钮右置,危险操作红 */
.oc-confirm-mask { z-index: 3100; }
.oc-confirm-mask .modal {
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.16), 0 24px 80px rgba(0, 0, 0, 0.18);
}

/* ---------- 3. 按钮体系:轻按微缩 + 一致的缓动 ---------- */
button { -webkit-tap-highlight-color: transparent; }
.btn {
  border-radius: 11px;
  transition: background var(--dur-1) var(--ease-out),
              border-color var(--dur-1) var(--ease-out),
              color var(--dur-1) var(--ease-out),
              box-shadow var(--dur-1) var(--ease-out),
              transform var(--dur-1) var(--ease-out),
              opacity var(--dur-1) var(--ease-out);
}
.btn:not(:disabled):hover { transform: translateY(-1px); }
.btn:not(:disabled):active { transform: scale(0.97); }
.btn:disabled { opacity: 0.55; }
.btn.primary {
  box-shadow: 0 1px 2px color-mix(in srgb, var(--brand, var(--accent)) 30%, transparent);
}
.btn.primary:not(:disabled):hover {
  box-shadow: 0 4px 12px color-mix(in srgb, var(--brand, var(--accent)) 32%, transparent);
}
.btn.primary:disabled {
  background: color-mix(in srgb, var(--brand, var(--accent)) 55%, var(--bg-surface));
  color: #fff;
  opacity: 1;
  cursor: not-allowed;
}
.btn.danger:not(:disabled):hover {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}

/* 图标按钮:统一圆形 hover 底色,按下缩放 */
.icon-btn {
  transition: background var(--dur-1) var(--ease-out),
              color var(--dur-1) var(--ease-out),
              transform var(--dur-1) var(--ease-out);
}
.icon-btn:not(:disabled):active { transform: scale(0.9); }

/* 主操作按钮(新建对话 / 发送):品牌色 + 按下更实 */
.new-chat-btn,
.send-btn,
.empty-start-btn {
  transition: background var(--dur-1) var(--ease-out),
              box-shadow var(--dur-1) var(--ease-out),
              transform var(--dur-1) var(--ease-out),
              opacity var(--dur-1) var(--ease-out);
}
.new-chat-btn:not(:disabled):active,
.send-btn:not(:disabled):active,
.empty-start-btn:not(:disabled):active {
  transform: scale(0.96);
}
.send-btn { transition: background var(--dur-1) var(--ease-out), transform var(--dur-1) var(--ease-out), box-shadow var(--dur-1) var(--ease-out), opacity var(--dur-1) var(--ease-out); }
.send-btn:disabled, .send-btn.muted { opacity: 1; }

/* 发送按钮 disabled → 发送态之间的切换淡入 */
#send-btn, #stop-btn { transition: opacity var(--dur-2) var(--ease-out), transform var(--dur-1) var(--ease-out), background var(--dur-1) var(--ease-out), box-shadow var(--dur-1) var(--ease-out); }

/* ---------- 4. 表单:聚焦光环统一为 3px 柔光 ---------- */
.field input, .select-box, .font-family-input, .rename-input, .msg-edit-area {
  transition: border-color var(--dur-1) var(--ease-out),
              box-shadow var(--dur-1) var(--ease-out),
              background var(--dur-1) var(--ease-out);
}
.field input:focus,
.font-family-input:focus,
.rename-input:focus,
.msg-edit-area:focus {
  box-shadow: 0 0 0 3.5px color-mix(in srgb, var(--brand, var(--accent)) 14%, transparent);
}
.chat-search:focus-within {
  box-shadow: 0 0 0 3.5px color-mix(in srgb, var(--brand, var(--accent)) 12%, transparent);
}
/* 输入框字体统一继承 */
.field input, .select-box, .font-family-input, .rename-input, .msg-edit-area, .auth-card input { font-family: inherit; }

/* 数字输入去除上下箭头的生硬感 */
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
input[type="number"] { -moz-appearance: textfield; appearance: textfield; }

/* range 滑杆:细轨 + 主色填充 */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--brand, var(--accent)) 22%, var(--bg-active));
  outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: #fff;
  border: 0.5px solid rgba(0, 0, 0, 0.06);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.22), 0 2px 6px rgba(0, 0, 0, 0.1);
  cursor: pointer;
  transition: transform var(--dur-1) var(--ease-spring);
}
input[type="range"]:active::-webkit-slider-thumb { transform: scale(1.18); }
[data-theme="dark"] input[type="range"]::-webkit-slider-thumb { background: #fff; border-color: rgba(255,255,255,0.2); }

/* 开关:弹跳式滑块 */
.switch .slider { transition: background var(--dur-2) var(--ease-spring), box-shadow var(--dur-2) var(--ease-out); }
.switch .slider::before {
  transition: transform var(--dur-2) var(--ease-spring);
  box-shadow: 0 1px 2px rgba(0,0,0,0.2), 0 2px 5px rgba(0,0,0,0.12);
}
.switch input:checked + .slider { box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--brand, var(--accent)) 60%, transparent); }

/* ---------- 5. 菜单 / 下拉:统一的弹性展开 ---------- */
.oc-menu,
.user-menu,
.dropdown-menu {
  animation: menuPop var(--dur-2) var(--ease-spring) both;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06), 0 12px 32px rgba(0,0,0,0.12);
}
[data-theme="dark"] .oc-menu,
[data-theme="dark"] .user-menu,
[data-theme="dark"] .dropdown-menu {
  box-shadow: 0 2px 8px rgba(0,0,0,0.4), 0 12px 32px rgba(0,0,0,0.55);
}
@keyframes menuPop {
  from { opacity: 0; transform: translateY(-5px) scale(0.97); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* 会话项:只在悬停时露出一个「更多」按钮,不再常驻四个图标挡标题 */
.chat-item-menu {
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  padding: 0;
  margin: 0;
  border: none;
  border-radius: 8px;
  background: transparent;
  box-shadow: none;
  opacity: 0;
  pointer-events: none;
  animation: none;
  z-index: 2;
  transition: opacity var(--dur-1) var(--ease-out);
}
.chat-item-wrap:hover .chat-item-menu,
.chat-item-wrap:focus-within .chat-item-menu {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(-50%);
}
.chat-item.active .chat-item-menu {
  display: flex;
  opacity: 0;
  pointer-events: none;
}
.chat-item-wrap:hover .chat-item.active .chat-item-menu,
.chat-item-wrap:focus-within .chat-item.active .chat-item-menu {
  opacity: 1;
  pointer-events: auto;
}
.chat-item-menu .more-btn {
  width: 28px;
  height: 28px;
  padding: 0;
  border: none;
  border-radius: 8px;
  background: color-mix(in srgb, var(--bg-sidebar, var(--bg-app)) 88%, transparent);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
.chat-item-menu .more-btn:hover {
  background: var(--bg-hover);
  color: var(--text);
}
/* 标题右侧淡出,避免「更多」按钮硬切文字 */
.chat-item-wrap:hover .chat-item .chat-title,
.chat-item-wrap:focus-within .chat-item .chat-title {
  -webkit-mask-image: linear-gradient(to right, #000 78%, transparent 100%);
  mask-image: linear-gradient(to right, #000 78%, transparent 100%);
}

/* 菜单项 hover 位移:轻微,不夸张 */
.oc-menu-item, .user-menu-item { transition: background var(--dur-1) var(--ease-out), color var(--dur-1) var(--ease-out); }

/* ---------- 6. 会话列表:行 hover 底色 + 拖拽条 ---------- */
.chat-item { transition: background var(--dur-1) var(--ease-out), color var(--dur-1) var(--ease-out); }
.chat-item-wrap { animation: rowIn var(--dur-2) var(--ease-out) both; }
@keyframes rowIn {
  from { opacity: 0; transform: translateY(3px); }
  to { opacity: 1; transform: none; }
}

/* 时间分组箭头旋转 */
.chat-group-chev { transition: transform var(--dur-2) var(--ease-spring); }
.chat-group-section.collapsed .chat-group-chev { transform: rotate(-90deg); }

/* ---------- 7. 消息区:进场、流式光标、操作栏 ---------- */
.msg { animation: msgRise var(--dur-3) var(--ease-out) both; }
@keyframes msgRise {
  from { opacity: 0; transform: translateY(5px); }
  to { opacity: 1; transform: none; }
}
/* 流式光标:呼吸,不刺眼 */
.stream-cursor {
  display: inline-block;
  width: 2.5px;
  height: 1.05em;
  vertical-align: -0.18em;
  margin-left: 2px;
  border-radius: 2px;
  background: var(--brand, var(--accent));
  animation: cursorPulse 1.1s var(--ease-io) infinite;
}
@keyframes cursorPulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.15; } }
html:not(.oc-streaming) .stream-cursor { display: none; }

/* 操作栏:默认更低调,悬停浮现(仅桌面) */
@media (hover: hover) {
  .msg .msg-actions { opacity: 0; }
  .msg:hover .msg-actions,
  .msg:focus-within .msg-actions { opacity: 1; }
}
.msg .msg-actions {
  transition: opacity var(--dur-2) var(--ease-out);
  margin-top: 2px;
}
.msg-action {
  transition: background var(--dur-1) var(--ease-out), color var(--dur-1) var(--ease-out), transform var(--dur-1) var(--ease-out);
}
.msg-action:not(:disabled):active { transform: scale(0.88); }

/* 复制成功:图标短暂切换为对勾 */
.msg-action.copied { color: #34a853; }
.msg-action.copied svg { animation: copyPop 260ms var(--ease-spring); }
@keyframes copyPop { 50% { transform: scale(1.25); } }

/* 生成中状态:阶段指示更轻 */
.phase-indicator {
  padding: 2px 10px 2px 0;
  color: var(--text-tertiary);
  background: none;
}
.phase-spinner {
  border-color: var(--hairline-strong);
  border-top-color: var(--brand, var(--accent));
}
.phase-text { animation: phaseFade var(--dur-3) var(--ease-out); }
@keyframes phaseFade { from { opacity: 0; } to { opacity: 1; } }

/* ---------- 8. 输入区:呼吸式聚焦 ---------- */
.composer {
  transition: border-color var(--dur-2) var(--ease-out),
              box-shadow var(--dur-2) var(--ease-out),
              background var(--dur-2) var(--ease-out);
}
.composer:focus-within {
  border-color: color-mix(in srgb, var(--brand, var(--accent)) 55%, var(--hairline));
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--brand, var(--accent)) 10%, transparent),
              var(--shadow-sm);
}
.attach-btn, .voice-btn {
  transition: background var(--dur-1) var(--ease-out), color var(--dur-1) var(--ease-out), transform var(--dur-1) var(--ease-out);
}
.attach-btn:active, .voice-btn:active { transform: scale(0.9); }
.voice-btn.recording {
  color: var(--danger);
  background: var(--danger-bg);
  animation: recPulse 1.6s var(--ease-io) infinite;
}
@keyframes recPulse {
  0%, 100% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--danger) 30%, transparent); }
  50% { box-shadow: 0 0 0 6px transparent; }
}

/* 附件预览:进场缩放 */
.attach-img-preview, .file-card { animation: attachIn var(--dur-2) var(--ease-spring) both; }
@keyframes attachIn { from { opacity: 0; transform: scale(0.9); } to { opacity: 1; transform: scale(1); } }
.fc-remove { transition: background var(--dur-1) var(--ease-out), color var(--dur-1) var(--ease-out); }

/* 回到底部按钮:浮起/落下,不闪现 */
.scroll-bottom-btn {
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: opacity var(--dur-2) var(--ease-out),
              transform var(--dur-2) var(--ease-spring),
              box-shadow var(--dur-1) var(--ease-out),
              background var(--dur-1) var(--ease-out);
}
.scroll-bottom-btn.show {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

/* ---------- 9. Toast:托盘堆叠 + 优雅退场 ---------- */
.toast {
  animation: toastRise var(--dur-3) var(--ease-spring) both;
  padding: 10px 20px;
  font-size: 13.5px;
  font-weight: 500;
  max-width: min(480px, 90vw);
  text-align: center;
  transition: opacity var(--dur-2) var(--ease-io), transform var(--dur-2) var(--ease-spring);
}
.toast.out { opacity: 0; transform: translateY(6px) scale(0.97); }
@keyframes toastRise {
  from { opacity: 0; transform: translateY(10px) scale(0.96); }
  to { opacity: 1; transform: none; }
}

/* ---------- 10. 空状态:首屏一次编排的进场 ---------- */
.empty-state > * {
  animation: emptyIn 460ms var(--ease-spring) both;
}
.empty-state > *:nth-child(1) { animation-delay: 0ms; }
.empty-state > *:nth-child(2) { animation-delay: 40ms; }
.empty-state > *:nth-child(3) { animation-delay: 80ms; }
.empty-state > *:nth-child(4) { animation-delay: 130ms; }
.empty-state > *:nth-child(5) { animation-delay: 180ms; }
.empty-state > *:nth-child(6) { animation-delay: 220ms; }
.empty-state > *:nth-child(7) { animation-delay: 260ms; }
@keyframes emptyIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}
/* 快捷入口卡片:更轻的浮起 */
.empty-suggest {
  transition: transform var(--dur-2) var(--ease-spring),
              box-shadow var(--dur-2) var(--ease-out),
              border-color var(--dur-2) var(--ease-out);
}
.empty-suggest:hover { transform: translateY(-2px); }
.empty-suggest:active { transform: translateY(0) scale(0.985); }

/* ---------- 11. 侧边栏:抽屉弹性、折叠位移 ---------- */
.sidebar { transition: margin-left var(--dur-4) var(--ease-spring), width var(--dur-2) var(--ease-out); }
@media (max-width: 768px) {
  .sidebar { transition: transform var(--dur-4) var(--ease-spring); }
}
.sidebar-mask {
  opacity: 0;
  transition: opacity var(--dur-3) var(--ease-io);
  background: rgba(0, 0, 0, 0.44);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}
.sidebar-mask.show { opacity: 1; }
.sidebar-mask.hidden { display: none !important; }
.sidebar-float-btn { animation: menuPop var(--dur-2) var(--ease-spring); }

/* ---------- 12. 设置面板:切换淡入 ---------- */
.settings-panel.active { animation: panelFade var(--dur-2) var(--ease-out); }
@keyframes panelFade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
.admin-panel.active { animation: panelFade var(--dur-2) var(--ease-out); }

/* 分段控件:选中滑块的弹性 */
.theme-seg, .font-size-control { display: inline-flex; align-items: center; gap: 6px; background: var(--bg-hover); border-radius: 999px; padding: 3px; }
.seg-btn { transition: background var(--dur-1) var(--ease-out), color var(--dur-1) var(--ease-out), box-shadow var(--dur-1) var(--ease-out); }
.seg-btn:not(:disabled):active { transform: scale(0.94); }

/* ---------- 13. 代码块 / 表格 / 引用 ---------- */
.code-block { animation: attachIn var(--dur-2) var(--ease-out) both; }
.code-copy { transition: color var(--dur-1) var(--ease-out), background var(--dur-1) var(--ease-out); }
.code-copy.copied { color: #34a853; }
.table-wrap { animation: attachIn var(--dur-2) var(--ease-out) both; }
.msg.assistant th.sortable { transition: color var(--dur-1) var(--ease-out); }

/* ---------- 14. 管理后台:同一节奏 ---------- */
.admin-tab { transition: background var(--dur-1) var(--ease-out), color var(--dur-1) var(--ease-out), box-shadow var(--dur-1) var(--ease-out); }
.stat-card { transition: box-shadow var(--dur-2) var(--ease-out), transform var(--dur-2) var(--ease-spring); }
.stat-card:hover { transform: translateY(-2px); }
.trend-col { transition: opacity var(--dur-1) var(--ease-out); }
.log-filter-btn { transition: background var(--dur-1) var(--ease-out), color var(--dur-1) var(--ease-out), border-color var(--dur-1) var(--ease-out); }
.admin-table tr { transition: background var(--dur-1) var(--ease-out); }
.admin-toolbar .search-input { transition: border-color var(--dur-1) var(--ease-out), box-shadow var(--dur-1) var(--ease-out); }
.admin-toolbar .search-input:focus {
  border-color: var(--brand, var(--accent));
  box-shadow: 0 0 0 3.5px color-mix(in srgb, var(--brand, var(--accent)) 12%, transparent);
}

/* ---------- 15. 登录页:进场编排 + 提交按钮 ---------- */
.auth-card { animation: authCardIn 520ms var(--ease-spring) both; }
@keyframes authCardIn {
  from { opacity: 0; transform: translateY(18px) scale(0.98); }
  to { opacity: 1; transform: none; }
}
.auth-logo, .auth-logo > * { animation: emptyIn 460ms var(--ease-spring) both; }
.auth-logo .logo-wrap { animation-delay: 60ms; }
.auth-logo h1 { animation-delay: 120ms; }
.auth-logo p { animation-delay: 160ms; }
.auth-card form { animation: emptyIn 460ms var(--ease-spring) both; animation-delay: 200ms; }
.auth-card .auth-switch { animation: emptyIn 460ms var(--ease-spring) both; animation-delay: 260ms; }
.auth-card .auth-error:not(.hidden) { animation: shakeX 380ms var(--ease-out); }
@keyframes shakeX {
  0%, 100% { transform: none; }
  20% { transform: translateX(-5px); }
  40% { transform: translateX(4px); }
  60% { transform: translateX(-3px); }
  80% { transform: translateX(2px); }
}
/* 登录/注册表单切换:淡入 + 轻微上移 */
.auth-form-switching { animation: authSwitch 280ms var(--ease-spring) both; }
@keyframes authSwitch {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}
.auth-card .btn.primary { transition: background var(--dur-1) var(--ease-out), transform var(--dur-1) var(--ease-out), box-shadow var(--dur-1) var(--ease-out), opacity var(--dur-1) var(--ease-out); }
.auth-card .btn.primary:not(:disabled):active { transform: scale(0.98); }
.auth-card .btn.primary.is-loading { opacity: 0.75; cursor: progress; }
/* 密码框:右侧内嵌可见性切换 */
.field .pw-wrap { position: relative; display: block; }
.field .pw-wrap input { width: 100%; padding-right: 40px; }
.pw-toggle {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  border: none;
  background: none;
  color: var(--text-tertiary);
  width: 30px;
  height: 30px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--dur-1) var(--ease-out), color var(--dur-1) var(--ease-out);
}
.pw-toggle:hover { background: var(--bg-hover); color: var(--text); }
/* :not(:disabled) 抬高优先级,避免被 redesign.css 的全局 button:active 缩放覆盖掉 translateY(-50%),否则按下时按钮会下坠 */
.pw-toggle:active:not(:disabled) { transform: translateY(-50%) scale(0.92); }
.key-keep-option {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 6px;
  color: var(--text-tertiary);
  font-size: 12px;
  cursor: pointer;
}
.key-keep-option input[type="checkbox"] {
  width: auto;
  margin: 0;
}

/* 供应商卡片上的 Key 行(加密存储,小眼睛按需查看) */
.provider-card .pc-key {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 2px;
  font-size: 12px;
  color: var(--text-tertiary);
  min-width: 0;
}
.provider-card .pc-key-value {
  font-family: var(--font-mono, ui-monospace, monospace);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.provider-card .pc-key-eye {
  border: none;
  background: none;
  color: var(--text-tertiary);
  width: 24px;
  height: 24px;
  border-radius: 6px;
  cursor: pointer;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background var(--dur-1) var(--ease-out), color var(--dur-1) var(--ease-out);
}
.provider-card .pc-key-eye:hover { background: var(--bg-hover); color: var(--text); }
.provider-card .pc-key-eye:disabled { opacity: 0.5; cursor: wait; }

/* ---------- 16. 灯箱 ---------- */
.lightbox { transition: opacity var(--dur-2) var(--ease-io); }
.lightbox img { animation: lbIn var(--dur-3) var(--ease-spring) both; }
@keyframes lbIn { from { opacity: 0; transform: scale(0.96); } to { opacity: 1; transform: none; } }
.lightbox-close { transition: background var(--dur-1) var(--ease-out), transform var(--dur-1) var(--ease-out); }
.lightbox-close:hover { background: rgba(255, 255, 255, 0.24); transform: scale(1.05); }

/* ---------- 17. 杂项细节 ---------- */
/* 供应商徽章圆角统一 */
.badge { border-radius: 7px; padding: 2px 8px; font-size: 11px; font-weight: 550; }
.badge.global { border-radius: 7px; }
/* 分割线更轻 */
.user-menu-sep { margin: 4px 8px; }
/* 链接下划线动画 */
.msg.assistant a { text-underline-offset: 3px; text-decoration: none; background: none; }
.msg.assistant a:hover { text-decoration: underline; }
/* 头像轻微立体 */
.avatar { box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.14), 0 1px 3px rgba(0,0,0,0.12); }
/* emoji 渲染 */
/* 设置弹窗打开时锁定页面滚动 */
body.modal-open { overflow: hidden; }
/* 折叠详情框:箭头旋转 */
details.add-provider > summary { transition: color var(--dur-1) var(--ease-out); }
details.add-provider[open] > summary { color: var(--text-secondary); }
/* 追问建议按钮:整行可点 + hover 左移 */
.follow-up-btn { transition: background var(--dur-1) var(--ease-out), color var(--dur-1) var(--ease-out), padding-left var(--dur-2) var(--ease-spring); }
.follow-up-btn:hover { padding-left: 12px; }
/* 页面加载进场的总开关(由 ui.js 在 boot 时移除) */
html.oc-boot #app, html.oc-boot body > * { opacity: 0; }
html:not(.oc-boot) .oc-fade-boot { animation: emptyIn var(--dur-3) var(--ease-out) both; }

/* 重新回答后的版本切换:贴在耗时右边 */
.msg-actions .reply-meta,
.reply-meta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  flex-shrink: 0;
  color: var(--text-tertiary);
  user-select: none;
}
.msg-actions .reply-cost,
.reply-meta .reply-cost,
.msg-actions .reply-time,
.reply-meta .reply-time,
.reply-meta .reply-usage,
.reply-meta .reply-model,
.reply-meta .reply-flag {
  margin: 0;
  padding: 0;
  flex-basis: auto;
  display: inline;
  font-size: 11.5px;
  color: var(--text-tertiary);
  font-variant-numeric: tabular-nums;
}
.msg.user .msg-actions .reply-time {
  margin-left: 8px;
}
.reply-meta .reply-model {
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.reply-flag {
  color: var(--danger);
}
/* 套餐卡片:价格与购买按钮上下排列,右对齐 */
.plan-card-buy {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
  flex-shrink: 0;
  white-space: nowrap;
}
.plan-price {
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}
.reply-continue {
  appearance: none;
  border: 0;
  background: transparent;
  padding: 0;
  font: inherit;
  font-size: 11.5px;
  color: var(--accent);
  cursor: pointer;
}
.reply-continue:hover { text-decoration: underline; }
.reply-versions {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  height: 22px;
  padding: 0 2px;
  border-radius: 7px;
  color: var(--text-secondary);
}
.reply-ver-btn {
  appearance: none;
  border: 0;
  background: transparent;
  color: inherit;
  width: 18px;
  height: 18px;
  padding: 0;
  border-radius: 5px;
  font-size: 12px;
  line-height: 18px;
  cursor: pointer;
}
.reply-ver-btn:hover:not(:disabled) {
  background: var(--bg-hover);
  color: var(--text);
}
.reply-ver-btn:disabled {
  opacity: 0.28;
  cursor: default;
}
.reply-ver-label {
  min-width: 28px;
  text-align: center;
  font-size: 11.5px;
  font-variant-numeric: tabular-nums;
  color: var(--text-secondary);
}

	/* 多轮对话:最左边小横线,鼠标移入才展开目录,不挤开对话 */
	.chat-toc {
	  position: absolute;
	  top: 56px;
	  bottom: 24px;
	  left: 0;
	  z-index: 18;
	  width: 16px;
	  max-height: none;
	  overflow: hidden;
	  display: flex;
	  flex-direction: column;
	  justify-content: center;
	  gap: 0;
	  padding: 10px 0;
	  border: 0;
	  border-radius: 0;
	  background: transparent;
	  box-shadow: none;
	  box-sizing: border-box;
	}
	.chat-toc.hidden { display: none; }
	.chat-toc-marks {
	  display: flex;
	  flex-direction: column;
	  align-items: center;
	  justify-content: center;
	  gap: 7px;
	  pointer-events: none;
	}
	.chat-toc-mark {
	  display: block;
	  width: 8px;
	  height: 1.5px;
	  border-radius: 0;
	  background: var(--text-tertiary);
	  opacity: 0.5;
	}
	.chat-toc-mark.active {
	  width: 11px;
	  background: var(--text-secondary);
	  opacity: 0.88;
	}
	.chat-toc-head,
	.chat-toc-item { display: none !important; }
	.chat-toc:hover,
	.chat-toc.open,
	.chat-toc:focus-within {
		  width: 176px;
		  justify-content: flex-start;
		  overflow-y: auto;
		  padding: 8px 6px 10px;
		  border: 1px solid color-mix(in srgb, var(--text) 8%, transparent);
		  border-left: 0;
		  border-radius: 0 16px 16px 0;
		  background: color-mix(in srgb, var(--bg-surface) 42%, transparent);
		  backdrop-filter: blur(28px) saturate(1.6);
		  -webkit-backdrop-filter: blur(28px) saturate(1.6);
		  box-shadow: 0 10px 32px rgba(15, 23, 42, 0.06);
		}
	.chat-toc:hover .chat-toc-marks,
	.chat-toc.open .chat-toc-marks,
	.chat-toc:focus-within .chat-toc-marks { display: none; }
	.chat-toc:hover .chat-toc-head,
	.chat-toc.open .chat-toc-head,
	.chat-toc:focus-within .chat-toc-head { display: block !important; }
	.chat-toc:hover .chat-toc-item,
	.chat-toc.open .chat-toc-item,
	.chat-toc:focus-within .chat-toc-item { display: flex !important; }
	.chat-toc-head {
	  padding: 10px 8px 6px;
	  font-size: 11px;
	  font-weight: 550;
	  letter-spacing: 0.04em;
	  color: var(--text-tertiary);
	}
	.chat-toc-item {
	  align-items: flex-start;
	  gap: 8px;
	  width: 100%;
	  margin: 0;
	  padding: 7px 8px;
	  border: 0;
	  border-radius: 8px;
	  background: transparent;
	  color: inherit;
	  text-align: left;
	  cursor: pointer;
	}
.chat-toc-item:hover { background: var(--bg-hover); }
.chat-toc-item.active { background: var(--bg-hover); }
.chat-toc-num {
  flex: 0 0 18px;
  width: 18px;
  height: 18px;
  margin-top: 1px;
  border-radius: 50%;
  background: var(--bg-active);
  color: var(--text-secondary);
  font-size: 11px;
  line-height: 18px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}
.chat-toc-item.active .chat-toc-num {
  background: color-mix(in srgb, var(--brand) 16%, var(--bg-active));
  color: var(--brand);
}
.chat-toc-copy {
  min-width: 0;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.chat-toc-q,
.chat-toc-a {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.chat-toc-q {
  font-size: 13px;
  color: var(--text);
}
.chat-toc-a {
  font-size: 11.5px;
  color: var(--text-tertiary);
}
@media (max-width: 768px) {
  .chat-toc { display: none !important; }
}

/* ---------- 18. 减弱动态:尊重系统设置 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .msg .msg-actions { opacity: 1; }
  .scroll-bottom-btn.show { transform: none; }
}