/* AI 工作台视觉重构：与品牌优先模型选择器配套。 */
.ai-portal-body--app {
  --ai-accent: #1b63f0;
  --ai-accent-strong: #0f52d7;
  --ai-accent-soft: #eef4ff;
  --ai-blue: #1b63f0;
  --ai-blue-soft: #eef4ff;
  --ai-line: #e2e8f2;
  --ai-line-strong: #ced8e8;
  --ai-panel-soft: #f8faff;
  background: #ffffff;
}

.ai-portal-body--app .ai-topbar {
  min-height: 72px;
  padding: 9px 20px;
  border-bottom: 1px solid #dfe6f0;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 2px 12px rgba(34, 58, 94, 0.04);
}

.ai-portal-body--app .ai-brand-mark {
  width: 42px;
  height: 42px;
}

.ai-portal-body--app .ai-brand-text strong {
  color: #10203d;
  font-size: 16px;
  font-weight: 860;
}

.ai-portal-body--app .ai-brand-text small {
  color: #66758f;
  font-size: 12px;
}

.ai-portal-body--app .ai-nav {
  align-self: stretch;
  gap: 4px;
  flex-wrap: nowrap;
}

.ai-portal-body--app .ai-nav a,
.ai-portal-body--app .ai-nav button {
  position: relative;
  height: auto;
  min-height: 44px;
  gap: 7px;
  padding: 0 12px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: #263b5c;
  font-size: 14px;
  font-weight: 760;
}

.ai-portal-body--app .ai-nav a:hover,
.ai-portal-body--app .ai-nav button:hover {
  background: #f4f7fc;
  color: #155eef;
}

.ai-portal-body--app .ai-nav a.active {
  background: transparent;
  color: #155eef;
}

.ai-portal-body--app .ai-nav a.active::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: -9px;
  height: 2px;
  border-radius: 999px;
  background: #1b63f0;
}

.ai-portal-body--app .ai-nav a.ai-business-return {
  min-height: 36px;
  border: 1px solid #d8e8e4;
  background: #f1faf7;
  color: #0f766e;
}

.ai-theme-icon--dark {
  display: none;
}

html[data-ai-theme="dark"] .ai-theme-icon--light {
  display: none;
}

html[data-ai-theme="dark"] .ai-theme-icon--dark {
  display: inline-block;
}

.ai-portal-body--app .ai-main {
  height: calc(100vh - 72px);
  height: calc(100dvh - 72px);
  padding: 0;
}

.ai-portal-body--app .ai-workspace {
  grid-template-columns: clamp(280px, 23vw, 340px) minmax(0, 1fr);
  gap: 0;
  border: 0;
  border-radius: 0;
  background: #ffffff;
  box-shadow: none;
}

.ai-portal-body--app .ai-rail {
  grid-template-rows: auto minmax(0, 1fr) auto;
  border: 0;
  border-right: 1px solid #e1e7f0;
  border-radius: 0;
  background: #fbfcff;
  box-shadow: none;
  overflow: hidden;
}

.ai-portal-body--app .ai-rail-new {
  padding: 24px 24px 14px;
  border: 0;
}

.ai-portal-body--app .ai-rail-new .ai-primary-button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-color: #1b63f0;
  border-radius: 11px;
  background: linear-gradient(135deg, #256bfa, #1157e8);
  box-shadow: 0 10px 22px rgba(27, 99, 240, 0.18);
  font-size: 15px;
}

.ai-portal-body--app .ai-rail-section {
  padding: 14px 20px 10px;
}

.ai-portal-body--app .ai-rail-title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 12px;
  color: #405274;
  font-size: 14px;
  font-weight: 850;
}

.ai-portal-body--app .ai-chat-list {
  gap: 2px;
  padding-right: 3px;
  scrollbar-width: thin;
}

.ai-portal-body--app .ai-chat-group-title {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 6px 5px;
  color: #587093;
  font-size: 12px;
  font-weight: 850;
}

.ai-portal-body--app .ai-chat-group-title i {
  height: 1px;
  flex: 1;
  background: #dde5f1;
}

.ai-portal-body--app .ai-chat-list-item {
  position: relative;
  min-width: 0;
}

.ai-portal-body--app .ai-chat-link {
  min-height: 38px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 7px 8px;
  border: 0;
  border-radius: 8px;
}

.ai-portal-body--app .ai-chat-link:hover,
.ai-portal-body--app .ai-chat-link.active {
  border: 0;
  background: #eef4ff;
  box-shadow: none;
}

.ai-portal-body--app .ai-chat-link span {
  min-width: 0;
  flex: 1;
  color: #263b5c;
  font-size: 13px;
  font-weight: 690;
}

.ai-portal-body--app .ai-chat-link small {
  flex: 0 0 auto;
  color: #7183a2;
  font-size: 11px;
}

.ai-portal-body--app .ai-chat-delete-form {
  position: absolute;
  top: 50%;
  right: 4px;
  z-index: 2;
  transform: translateY(-50%);
  opacity: 0;
  pointer-events: none;
}

.ai-portal-body--app .ai-chat-list-item:hover .ai-chat-delete-form,
.ai-portal-body--app .ai-chat-list-item:focus-within .ai-chat-delete-form {
  opacity: 1;
  pointer-events: auto;
}

.ai-portal-body--app .ai-chat-list-item:hover .ai-chat-link small,
.ai-portal-body--app .ai-chat-list-item:focus-within .ai-chat-link small {
  visibility: hidden;
}

.ai-portal-body--app .ai-chat-delete-button {
  width: 30px;
  height: 30px;
  min-width: 30px;
  min-height: 30px;
  display: grid;
  place-items: center;
  padding: 0;
  border: 0;
  border-radius: 8px;
  background: #ffffff;
  color: #7a879d;
  box-shadow: 0 4px 12px rgba(39, 56, 88, 0.10);
}

.ai-portal-body--app .ai-chat-delete-button:hover {
  background: #fff1f2;
  color: #d92d20;
}

.ai-portal-body--app .ai-canvas {
  border: 0;
  border-radius: 0;
  background: #ffffff;
}

.ai-portal-body--app .ai-canvas--welcome {
  place-items: start center;
  padding: clamp(58px, 8.5vh, 92px) clamp(28px, 7vw, 110px) 42px;
  background:
    radial-gradient(circle at 48% 2%, rgba(80, 135, 255, 0.10), transparent 34%),
    #ffffff;
  overflow-y: auto;
}

.ai-portal-body--app .ai-welcome {
  width: min(920px, 100%);
  gap: 13px;
}

.ai-portal-body--app .ai-welcome .ai-kicker {
  border-color: #d3e1ff;
  background: #f5f8ff;
  color: #2867ed;
}

.ai-portal-body--app .ai-welcome h1 {
  margin-top: 12px;
  color: #0d2f78;
  font-size: clamp(38px, 4.4vw, 58px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.035em;
}

.ai-portal-body--app .ai-welcome p {
  max-width: 760px;
  color: #677896;
  font-size: 15px;
  line-height: 1.65;
}

/* GPT 式输入：空白时一行，输入后由现有 autoGrow 脚本逐行增高。 */
.ai-portal-body--app .ai-hero-composer,
.ai-workspace--chat .ai-dock-card {
  gap: 6px;
  padding: 8px;
  border: 1px solid #cfd9e8;
  border-radius: 17px;
  background: #ffffff;
  box-shadow: 0 14px 38px rgba(34, 64, 112, 0.10);
}

.ai-portal-body--app .ai-hero-composer {
  margin-top: 8px;
}

.ai-portal-body--app .ai-hero-composer textarea,
.ai-workspace--chat .ai-dock-card--chat textarea {
  height: 48px;
  min-height: 48px;
  max-height: 180px;
  padding: 13px 13px 9px;
  border: 0;
  border-radius: 12px;
  background: transparent;
  color: #172b4d;
  font-size: 15px;
  line-height: 1.55;
  resize: none;
}

.ai-portal-body--app .ai-hero-composer textarea:focus,
.ai-workspace--chat .ai-dock-card--chat textarea:focus {
  box-shadow: none;
}

.ai-portal-body--app .ai-composer-actions,
.ai-workspace--chat .ai-composer-toolbar,
.ai-workspace--chat .ai-composer-tools {
  gap: 6px;
}

.ai-portal-body--app .ai-composer-actions {
  flex-wrap: wrap;
  padding: 2px;
}

.ai-portal-body--app .ai-creation-control,
.ai-workspace--chat .ai-creation-control {
  order: 10;
}

.ai-portal-body--app .ai-web-search-toggle,
.ai-workspace--chat .ai-web-search-toggle {
  order: 20;
}

.ai-portal-body--app .ai-web-search-toggle::before,
.ai-workspace--chat .ai-web-search-toggle::before {
  content: none !important;
  display: none !important;
}

.ai-portal-body--app .ai-attachment-button,
.ai-workspace--chat .ai-attachment-button {
  order: 30;
}

.ai-portal-body--app .ai-composer-actions .ai-model-picker,
.ai-workspace--chat .ai-composer-tools .ai-model-picker {
  order: 40;
  flex: 0 0 240px;
  width: 240px;
  max-width: 240px;
  margin-left: auto;
}

.ai-portal-body--app .ai-creation-option,
.ai-portal-body--app .ai-tool-toggle,
.ai-portal-body--app .ai-attachment-button,
.ai-workspace--chat .ai-creation-option,
.ai-workspace--chat .ai-tool-toggle,
.ai-workspace--chat .ai-attachment-button {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 0 11px;
  border: 1px solid #d7e1f1 !important;
  border-radius: 11px;
  background: #ffffff !important;
  color: #30517f !important;
  box-shadow: none !important;
  font-size: 12px;
  font-weight: 760;
}

.ai-portal-body--app .ai-creation-option:hover,
.ai-portal-body--app .ai-tool-toggle:hover,
.ai-portal-body--app .ai-attachment-button:hover,
.ai-workspace--chat .ai-creation-option:hover,
.ai-workspace--chat .ai-tool-toggle:hover,
.ai-workspace--chat .ai-attachment-button:hover {
  border-color: #bcd0fb !important;
  background: #f5f8ff !important;
  color: #155eef !important;
}

.ai-portal-body--app .ai-creation-option[aria-pressed="true"],
.ai-workspace--chat .ai-creation-option[aria-pressed="true"],
.ai-portal-body--app .ai-web-search-toggle:has(input:checked),
.ai-workspace--chat .ai-web-search-toggle:has(input:checked) {
  border-color: #b9ceff !important;
  background: #edf3ff !important;
  color: #155eef !important;
  box-shadow: inset 0 0 0 1px rgba(51, 112, 255, 0.12) !important;
}

.ai-portal-body--app .ai-web-search-toggle input,
.ai-workspace--chat .ai-web-search-toggle input,
.ai-portal-body--app .ai-attachment-button input,
.ai-workspace--chat .ai-attachment-button input {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  margin: 0 !important;
  appearance: none !important;
  opacity: 0 !important;
  pointer-events: none;
}

.ai-portal-body--app .ai-hero-composer .ai-send-button,
.ai-workspace--chat .ai-send-button {
  order: 100;
  width: 40px;
  height: 40px;
  min-width: 40px;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 0;
  border-radius: 12px;
  background: #1769f5;
  color: #ffffff;
  box-shadow: 0 7px 16px rgba(23, 105, 245, 0.23);
}

.ai-portal-body--app .ai-hero-composer .ai-send-button [data-ai-submit-label],
.ai-workspace--chat .ai-send-button [data-ai-submit-label] {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

.ai-portal-body--app .ai-hero-composer .ai-send-button:disabled,
.ai-workspace--chat .ai-send-button:disabled {
  background: #b8c7df;
  box-shadow: none;
}

.ai-workspace--chat .ai-chat-head {
  min-height: 68px;
  padding: 12px clamp(18px, 4vw, 44px);
}

.ai-workspace--chat .ai-message-list {
  background: #ffffff;
  padding-left: clamp(24px, 7vw, 100px);
  padding-right: clamp(24px, 7vw, 100px);
}

.ai-workspace--chat .ai-dock {
  padding-left: clamp(18px, 6vw, 86px);
  padding-right: clamp(18px, 6vw, 86px);
}

.ai-workspace--chat .ai-dock-card {
  max-width: 980px;
  margin: 0 auto;
}

.ai-workspace--chat .ai-composer-toolbar {
  border-top: 0;
  padding: 2px;
}

.ai-workspace--chat .ai-composer-tools {
  flex-wrap: wrap;
}

/* 生图、视频、音乐与配音页沿用同一视觉语言。 */
.ai-portal-body--app .ai-studio-shell {
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
  padding: clamp(28px, 4vw, 52px) 0 60px;
  border: 0;
  overflow: visible;
}

.ai-portal-body--app .ai-studio-head {
  margin-bottom: 20px;
}

.ai-portal-body--app .ai-studio-head h1 {
  color: #102f6b;
  font-size: clamp(30px, 3.5vw, 44px);
}

.ai-portal-body--app .ai-image-form {
  gap: 16px;
  padding: clamp(18px, 2.8vw, 28px);
  border: 1px solid #dde5f1;
  border-radius: 18px;
  background: #ffffff;
  box-shadow: 0 16px 44px rgba(34, 64, 112, 0.08);
}

.ai-portal-body--app .ai-image-form .ai-model-picker {
  width: min(100%, 420px);
}

.ai-portal-body--app .ai-model-picker .ai-model-picker__trigger {
  border-color: #cbd8f7 !important;
  background: rgba(255, 255, 255, 0.98) !important;
  color: #23406f !important;
  box-shadow: 0 4px 14px rgba(39, 84, 176, 0.06) !important;
}

.ai-portal-body--app .ai-model-picker .ai-model-picker__trigger:hover,
.ai-portal-body--app .ai-model-picker .ai-model-picker__trigger:focus-visible,
.ai-portal-body--app .ai-model-picker.is-open .ai-model-picker__trigger {
  border-color: #3370ff !important;
  background: #f7faff !important;
  color: #155eef !important;
  box-shadow: 0 0 0 3px rgba(51, 112, 255, 0.10), 0 8px 20px rgba(39, 84, 176, 0.10) !important;
}

.ai-portal-body--app .ai-image-form .ai-model-picker__brand-option,
.ai-portal-body--app .ai-image-form .ai-model-picker__model-option,
.ai-portal-body--app .ai-image-form .ai-model-picker__mobile-close {
  border-color: transparent !important;
  background: transparent !important;
  color: #263b5c !important;
  box-shadow: none !important;
}

.ai-portal-body--app .ai-image-form .ai-model-picker__brand-option:hover,
.ai-portal-body--app .ai-image-form .ai-model-picker__brand-option:focus-visible,
.ai-portal-body--app .ai-image-form .ai-model-picker__model-option:hover,
.ai-portal-body--app .ai-image-form .ai-model-picker__model-option:focus-visible {
  border-color: #d8e4ff !important;
  background: #f5f8ff !important;
  color: #155eef !important;
}

.ai-portal-body--app .ai-image-form .ai-model-picker__brand-option[aria-selected="true"],
.ai-portal-body--app .ai-image-form .ai-model-picker__model-option[aria-selected="true"] {
  border-color: #d7e4ff !important;
  background: linear-gradient(135deg, #f2f6ff, #edf3ff) !important;
  color: #155eef !important;
}

/* 视频创作台与工作台共用蓝白视觉，保留全部 V2 能力和表单字段。 */
.ai-portal-body--app .ai-video-studio-v2 {
  --v2-bg: #f5f8ff;
  --v2-panel: #ffffff;
  --v2-line: #dce5f2;
  --v2-muted: #61708a;
  --v2-accent: #3370ff;
  width: min(1440px, calc(100% - 28px));
  max-width: 100%;
  min-height: calc(100vh - 72px);
  margin: 0 auto !important;
  padding: 30px 18px 60px !important;
  overflow-x: hidden;
  box-sizing: border-box;
  border-radius: 0 !important;
  background: radial-gradient(circle at 45% -8%, rgba(51, 112, 255, 0.12), transparent 38%), #f7faff !important;
  color: #17365f !important;
}

.ai-portal-body--app .ai-video-studio-v2__header h1,
.ai-portal-body--app .ai-video-task-dock h2 {
  color: #102f6b;
}

.ai-portal-body--app .ai-video-studio-v2__header p,
.ai-portal-body--app .ai-video-runtime-state span,
.ai-portal-body--app .ai-video-panel-title small,
.ai-portal-body--app .ai-video-dropzone > small,
.ai-portal-body--app .ai-video-task-card__body small {
  color: #6b7b95;
}

.ai-portal-body--app .ai-video-runtime-state,
.ai-portal-body--app .ai-video-model-rail,
.ai-portal-body--app .ai-video-creative-canvas,
.ai-portal-body--app .ai-video-control-panel,
.ai-portal-body--app .ai-video-task-dock {
  border-color: #dce5f2 !important;
  background: rgba(255, 255, 255, 0.97) !important;
  box-shadow: 0 16px 44px rgba(34, 64, 112, 0.08) !important;
}

.ai-portal-body--app .ai-video-runtime-state strong {
  color: #147d62;
}

.ai-portal-body--app .ai-video-studio-v2__layout {
  grid-template-columns: minmax(230px, 260px) minmax(0, 1fr) minmax(250px, 290px);
  gap: 14px;
  max-width: 100%;
}

.ai-portal-body--app .ai-video-studio-v2__layout > * {
  min-width: 0;
}

.ai-portal-body--app .ai-video-panel-title,
.ai-portal-body--app .ai-video-task-card {
  border-color: #e1e8f2 !important;
}

.ai-portal-body--app .ai-video-panel-title strong,
.ai-portal-body--app .ai-video-prompt-field > span,
.ai-portal-body--app .ai-video-dropzone > strong,
.ai-portal-body--app .ai-video-control-panel .field > span {
  color: #294a75;
}

.ai-portal-body--app .ai-video-prompt-field textarea,
.ai-portal-body--app .ai-video-control-panel select,
.ai-portal-body--app .ai-video-control-panel input[type="number"],
.ai-portal-body--app .ai-video-active-model,
.ai-portal-body--app .ai-video-toggle {
  border-color: #d8e2ef !important;
  background: #f8fbff !important;
  color: #203e68 !important;
}

.ai-portal-body--app .ai-video-template-strip button {
  border-color: #d8e2ef !important;
  background: #ffffff !important;
  color: #31517c !important;
}

.ai-portal-body--app .ai-video-template-strip button:hover {
  border-color: #9fbbf6 !important;
  background: #f1f6ff !important;
  color: #155eef !important;
}

.ai-portal-body--app .ai-video-dropzone {
  border-color: #b9caf0 !important;
  background: linear-gradient(145deg, #f5f8ff, #fbfdff) !important;
}

.ai-portal-body--app .ai-video-dropzone > span,
.ai-portal-body--app .ai-video-active-model span,
.ai-portal-body--app .ai-video-quota-box span {
  color: #4d6fe8;
}

.ai-portal-body--app .ai-video-quota-box {
  border-color: #dce5f2 !important;
  background: #fbfdff;
}

.ai-portal-body--app .ai-video-control-panel .ai-composer-submit button {
  background: linear-gradient(135deg, #2563eb, #3370ff 58%, #37a7df) !important;
  color: #ffffff !important;
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.20);
}

.ai-portal-body--app .ai-video-task-card {
  background: #ffffff !important;
}

.ai-portal-body--app .ai-video-task-card__body p {
  color: #455a78;
}

.ai-portal-body--app .ai-video-task-dock nav a {
  color: #58708f;
}

.ai-portal-body--app .ai-video-task-dock nav a.active {
  background: #edf3ff;
  color: #155eef;
}

@media (max-width: 1180px) {
  .ai-portal-body--app .ai-video-studio-v2__layout {
    grid-template-columns: minmax(220px, 260px) minmax(0, 1fr);
  }

  .ai-portal-body--app .ai-video-control-panel {
    grid-column: 1 / -1;
  }
}

@media (max-width: 760px) {
  .ai-portal-body--app .ai-video-studio-v2 {
    width: 100%;
    padding: 18px 12px 54px !important;
  }

  .ai-portal-body--app .ai-video-studio-v2__layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .ai-portal-body--app .ai-video-control-panel {
    grid-column: auto;
  }
}

.ai-portal-body--app .ai-image-form textarea[data-ai-enter-submit] {
  min-height: 52px;
  max-height: 180px;
  resize: none;
}

.ai-mobile-rail-toggle,
.ai-rail-backdrop {
  display: none;
}

html[data-ai-theme="dark"] .ai-portal-body--app .ai-topbar,
html[data-ai-theme="dark"] .ai-portal-body--app .ai-rail,
html[data-ai-theme="dark"] .ai-portal-body--app .ai-canvas--welcome,
html[data-ai-theme="dark"] .ai-portal-body--app .ai-hero-composer,
html[data-ai-theme="dark"] .ai-workspace--chat .ai-dock-card,
html[data-ai-theme="dark"] .ai-portal-body--app .ai-image-form {
  border-color: rgba(148, 163, 184, 0.20);
  background: #0d1829;
}

html[data-ai-theme="dark"] .ai-portal-body--app .ai-welcome h1,
html[data-ai-theme="dark"] .ai-portal-body--app .ai-studio-head h1 {
  color: #d9e6ff;
}

@media (max-width: 1120px) {
  .ai-portal-body--app .ai-nav a,
  .ai-portal-body--app .ai-nav button {
    padding: 0 8px;
  }

  .ai-portal-body--app .ai-nav a span,
  .ai-portal-body--app .ai-nav button span {
    display: none;
  }

  .ai-portal-body--app .ai-nav a.ai-business-return span,
  .ai-portal-body--app .ai-theme-toggle span {
    display: inline;
  }
}

@media (max-width: 900px) {
  .ai-portal-body--app .ai-topbar {
    min-height: 64px;
    padding: 8px 12px;
  }

  .ai-portal-body--app .ai-main {
    height: calc(100vh - 64px);
    height: calc(100dvh - 64px);
  }

  .ai-portal-body--app .ai-workspace {
    grid-template-columns: 1fr;
  }

  .ai-portal-body--app .ai-rail {
    position: fixed;
    top: 64px;
    bottom: 0;
    left: 0;
    z-index: 55;
    width: min(86vw, 340px);
    display: grid;
    transform: translateX(-104%);
    transition: transform 180ms ease;
    box-shadow: 18px 0 44px rgba(22, 41, 73, 0.18);
  }

  .ai-portal-body--app.is-ai-rail-open .ai-rail {
    transform: translateX(0);
  }

  .ai-mobile-rail-toggle {
    min-width: 42px;
    min-height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin-left: auto;
    border: 1px solid #d9e3f1;
    border-radius: 10px;
    background: #ffffff;
    color: #31517f;
  }

  .ai-mobile-rail-toggle span {
    font-size: 12px;
    font-weight: 760;
  }

  .ai-rail-backdrop {
    position: fixed;
    inset: 64px 0 0;
    z-index: 50;
    display: block;
    border: 0;
    background: rgba(13, 26, 48, 0.32);
    opacity: 0;
    pointer-events: none;
    transition: opacity 180ms ease;
  }

  .ai-portal-body--app.is-ai-rail-open .ai-rail-backdrop {
    opacity: 1;
    pointer-events: auto;
  }

  .ai-portal-body--app .ai-canvas--welcome {
    padding: clamp(42px, 7vh, 68px) 22px 36px;
  }
}

.ai-portal-body--app .ai-composer-actions .ai-attachment-button,
.ai-workspace--chat .ai-composer-toolbar > .ai-attachment-button {
  height: 40px;
  min-height: 40px;
}

@media (max-width: 620px) {
  .ai-portal-body--app .ai-brand-text small {
    display: none;
  }

  .ai-portal-body--app .ai-nav {
    position: fixed;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 70;
    min-height: 60px;
    display: flex;
    align-items: stretch;
    justify-content: space-around;
    gap: 0;
    padding: 4px max(8px, env(safe-area-inset-right)) max(4px, env(safe-area-inset-bottom)) max(8px, env(safe-area-inset-left));
    border-top: 1px solid #dfe6f0;
    background: rgba(255, 255, 255, 0.97);
    box-shadow: 0 -8px 24px rgba(31, 55, 91, 0.08);
    backdrop-filter: blur(16px);
  }

  .ai-portal-body--app .ai-nav > * {
    display: none !important;
  }

  .ai-portal-body--app .ai-nav > a.ai-nav-primary {
    min-width: 62px;
    min-height: 52px;
    display: inline-flex !important;
    flex: 1 1 0;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    padding: 4px 5px;
    border-radius: 10px;
    font-size: 11px;
  }

  .ai-portal-body--app .ai-nav > a.ai-nav-primary span {
    display: inline !important;
    max-width: 72px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .ai-portal-body--app .ai-nav > a.ai-nav-primary.active {
    background: #eef4ff;
  }

  .ai-portal-body--app .ai-nav > a.ai-nav-primary.active::after {
    right: 24%;
    bottom: 0;
    left: 24%;
  }

  .ai-portal-body--app .ai-main {
    height: calc(100vh - 124px);
    height: calc(100dvh - 124px);
  }

  .ai-portal-body--app .ai-rail {
    bottom: 60px;
  }

  .ai-portal-body--app .ai-rail-backdrop {
    bottom: 60px;
  }

  .ai-portal-body--app .ai-welcome h1 {
    font-size: 34px;
  }

  .ai-portal-body--app .ai-welcome p {
    font-size: 14px;
  }

  .ai-portal-body--app .ai-composer-actions {
    display: grid !important;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    align-items: center;
    gap: 6px;
    overflow: visible;
  }

  .ai-portal-body--app .ai-composer-actions .ai-creation-control {
    grid-column: 1 / -1;
  }

  .ai-portal-body--app .ai-composer-actions .ai-web-search-toggle {
    grid-column: 1 / 7;
    width: 100%;
  }

  .ai-portal-body--app .ai-composer-actions .ai-attachment-button {
    grid-column: 7 / -1;
    width: 100%;
  }

  .ai-portal-body--app .ai-composer-actions .ai-model-picker {
    grid-column: 1 / 11;
    width: 100%;
    max-width: none;
    min-width: 0;
    margin-left: 0;
  }

  .ai-portal-body--app .ai-composer-actions > select:not([hidden]) {
    grid-column: 1 / -1;
    width: 100%;
  }

  .ai-portal-body--app .ai-composer-actions .ai-send-button {
    grid-column: 11 / -1;
    justify-self: end;
    align-self: center;
  }

  .ai-portal-body--app .ai-hero-composer,
  .ai-workspace--chat .ai-dock-card {
    border-radius: 15px;
  }

  .ai-portal-body--app .ai-creation-control,
  .ai-workspace--chat .ai-creation-control {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .ai-portal-body--app .ai-creation-option,
  .ai-workspace--chat .ai-creation-option {
    width: 100%;
    min-width: 0;
    padding: 0 6px;
  }

  .ai-portal-body--app .ai-creation-option > span:last-child,
  .ai-workspace--chat .ai-creation-option > span:last-child {
    display: none;
  }

  .ai-portal-body--app .ai-composer-actions .ai-model-picker,
  .ai-workspace--chat .ai-composer-tools .ai-model-picker {
    flex: 1 1 100%;
    width: 100%;
    max-width: none;
    margin-left: 0;
  }

  .ai-portal-body--app .ai-studio-shell {
    width: calc(100% - 24px);
    padding-top: 24px;
  }
}

.ai-video-preset-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(118px, 1fr)) auto minmax(220px, 1.4fr);
  gap: 8px;
  align-items: end;
  width: 100%;
  padding: 10px;
  border: 1px solid rgba(111, 132, 255, 0.2);
  border-radius: 14px;
  background: rgba(91, 105, 220, 0.07);
  box-sizing: border-box;
}

.ai-video-preset-strip[hidden] {
  display: none !important;
}

.ai-video-preset-strip > label {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.ai-video-preset-strip > label > span {
  color: var(--ai-muted, #6f7890);
  font-size: 11px;
}

.ai-video-preset-strip select {
  width: 100%;
  min-width: 0;
}

.ai-video-preset-audio {
  display: flex !important;
  grid-auto-flow: column;
  align-items: center;
  justify-content: start;
  gap: 6px !important;
  min-height: 38px;
  padding: 0 8px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.55);
}

.ai-video-preset-copy {
  display: grid;
  gap: 3px;
  min-width: 0;
}

.ai-video-preset-copy strong {
  font-size: 12px;
  line-height: 1.45;
}

.ai-video-preset-copy small {
  color: #25855a;
}

.ai-video-preset-copy small.is-error {
  color: #b64232;
}

.ai-video-preset-copy--panel {
  margin: 10px 0;
  padding: 10px;
  border: 1px solid rgba(155, 135, 255, 0.2);
  border-radius: 10px;
  background: rgba(155, 135, 255, 0.07);
}

@media (max-width: 900px) {
  .ai-video-preset-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .ai-video-preset-copy {
    grid-column: 1 / -1;
  }
}

@media (max-width: 560px) {
  .ai-video-preset-strip {
    grid-template-columns: minmax(0, 1fr);
  }

  .ai-video-preset-copy {
    grid-column: auto;
  }
}

/*
 * 窄屏对话框保持“模型 + 发送”成组显示。
 * 旧版对话样式会在 720px 以下把工具栏改成纵向 flex，导致模型选择器
 * 占满整行并把发送键挤到下一行；这里与首页的 12 列布局保持一致。
 */
@media (max-width: 1024px) {
  .ai-workspace--chat .ai-composer-toolbar {
    display: grid !important;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    align-items: center !important;
    gap: 6px;
  }

  .ai-workspace--chat .ai-composer-tools {
    display: contents;
  }

  .ai-workspace--chat .ai-composer-tools .ai-creation-control {
    grid-row: 1;
    grid-column: 1 / -1;
  }

  .ai-workspace--chat .ai-composer-tools .ai-web-search-toggle {
    grid-row: 2;
    grid-column: 1 / 7;
    width: 100%;
  }

  .ai-workspace--chat .ai-composer-toolbar > .ai-attachment-button {
    grid-row: 2;
    grid-column: 7 / -1;
    width: 100%;
  }

  .ai-workspace--chat .ai-composer-tools .ai-model-picker {
    grid-row: 3;
    grid-column: 1 / 11;
    width: auto;
    max-width: none;
    min-width: 0;
    margin-left: 0;
    flex: none;
  }

  .ai-workspace--chat .ai-composer-tools > select:not([hidden]) {
    grid-row: 4;
    grid-column: 1 / -1;
    width: 100%;
    max-width: none;
  }

  .ai-workspace--chat .ai-composer-submit {
    grid-row: 3;
    grid-column: 11 / -1;
    min-width: 40px;
    display: flex !important;
    flex-direction: row !important;
    align-items: center !important;
    justify-content: flex-end;
    gap: 4px;
  }

  .ai-workspace--chat .ai-composer-submit .ai-send-button {
    width: 40px !important;
    min-width: 40px;
  }
}

@media (min-width: 621px) and (max-width: 760px) {
  .ai-portal-body--app .ai-composer-actions {
    display: grid !important;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    align-items: center;
    gap: 6px;
    overflow: visible;
  }

  .ai-portal-body--app .ai-composer-actions .ai-creation-control {
    grid-column: 1 / -1;
  }

  .ai-portal-body--app .ai-composer-actions .ai-web-search-toggle {
    grid-column: 1 / 7;
    width: 100%;
  }

  .ai-portal-body--app .ai-composer-actions .ai-attachment-button {
    grid-column: 7 / -1;
    width: 100%;
  }

  .ai-portal-body--app .ai-composer-actions .ai-model-picker {
    grid-column: 7 / 12;
    width: 100%;
    max-width: none;
    min-width: 0;
    margin-left: 0;
  }

  .ai-portal-body--app .ai-composer-actions > select:not([hidden]) {
    grid-column: 1 / -1;
    width: 100%;
  }

  .ai-portal-body--app .ai-composer-actions .ai-send-button {
    grid-column: 12 / -1;
    justify-self: end;
    align-self: center;
  }
}

@media (min-width: 621px) and (max-width: 1024px) {
  .ai-workspace--chat .ai-composer-tools .ai-model-picker {
    grid-column: 7 / 12;
  }

  .ai-workspace--chat .ai-composer-submit {
    grid-column: 12 / -1;
  }
}

/* 创作方式位于输入内容上方；模型、附件和发送保留在底部操作行。 */
.ai-portal-body--app .ai-composer-modebar,
.ai-workspace--chat .ai-composer-modebar {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  padding: 2px 2px 8px;
  border-bottom: 1px solid #edf1f7;
}

.ai-portal-body--app .ai-composer-modebar .ai-creation-control,
.ai-workspace--chat .ai-composer-modebar .ai-creation-control,
.ai-portal-body--app .ai-composer-modebar .ai-web-search-toggle,
.ai-workspace--chat .ai-composer-modebar .ai-web-search-toggle {
  order: initial;
}

.ai-portal-body--app .ai-composer-actions {
  align-items: center;
  justify-content: flex-end;
}

.ai-portal-body--app .ai-composer-actions .ai-model-picker {
  order: 30;
}

.ai-portal-body--app .ai-composer-actions .ai-attachment-button {
  order: 40;
}

/* 对话页的通用主按钮规则不能污染模型菜单；仅选中项使用浅蓝状态。 */
.ai-portal-body--app .ai-model-picker .ai-model-picker__brand-option,
.ai-portal-body--app .ai-model-picker .ai-model-picker__model-option {
  border-color: transparent !important;
  background: transparent !important;
  color: #263b5c !important;
  box-shadow: none !important;
}

.ai-portal-body--app .ai-model-picker .ai-model-picker__brand-option:hover,
.ai-portal-body--app .ai-model-picker .ai-model-picker__brand-option:focus-visible,
.ai-portal-body--app .ai-model-picker .ai-model-picker__model-option:hover,
.ai-portal-body--app .ai-model-picker .ai-model-picker__model-option:focus-visible {
  border-color: #d8e4ff !important;
  background: #f5f8ff !important;
  color: #155eef !important;
}

.ai-portal-body--app .ai-model-picker .ai-model-picker__brand-option[aria-selected="true"],
.ai-portal-body--app .ai-model-picker .ai-model-picker__model-option[aria-selected="true"] {
  border-color: #d7e4ff !important;
  background: #edf3ff !important;
  color: #155eef !important;
}

@media (max-width: 1024px) {
  .ai-workspace--chat .ai-composer-toolbar {
    display: grid !important;
    grid-template-columns: minmax(0, 1fr) auto auto;
    align-items: center !important;
    gap: 6px;
  }

  .ai-workspace--chat .ai-composer-tools {
    display: contents;
  }

  .ai-workspace--chat .ai-composer-tools .ai-model-picker {
    grid-row: 1;
    grid-column: 1;
    width: min(100%, 240px);
    max-width: 240px;
    min-width: 0;
    margin-left: auto;
    justify-self: end;
  }

  .ai-workspace--chat .ai-composer-toolbar > .ai-attachment-button {
    grid-row: 1;
    grid-column: 2;
    width: auto;
  }

  .ai-workspace--chat .ai-composer-submit {
    grid-row: 1;
    grid-column: 3;
    min-width: 40px;
  }

  .ai-workspace--chat .ai-composer-tools > select:not([hidden]) {
    grid-row: 2;
    grid-column: 1 / -1;
    width: 100%;
    max-width: none;
  }
}

@media (max-width: 760px) {
  .ai-portal-body--app .ai-composer-modebar,
  .ai-workspace--chat .ai-composer-modebar {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .ai-portal-body--app .ai-composer-modebar .ai-creation-control,
  .ai-workspace--chat .ai-composer-modebar .ai-creation-control {
    width: 100%;
    min-width: 0;
  }

  .ai-portal-body--app .ai-composer-actions {
    display: grid !important;
    grid-template-columns: minmax(0, 1fr) auto auto;
    align-items: center;
    gap: 6px;
  }

  .ai-portal-body--app .ai-composer-actions .ai-model-picker {
    grid-row: 1;
    grid-column: 1;
    width: min(100%, 240px);
    max-width: 240px;
    min-width: 0;
    margin-left: auto;
    justify-self: end;
  }

  .ai-portal-body--app .ai-composer-actions .ai-attachment-button {
    grid-row: 1;
    grid-column: 2;
    width: auto;
  }

  .ai-portal-body--app .ai-composer-actions .ai-send-button {
    grid-row: 1;
    grid-column: 3;
    justify-self: end;
  }

  .ai-portal-body--app .ai-composer-actions > select:not([hidden]) {
    grid-row: 2;
    grid-column: 1 / -1;
    width: 100%;
  }
}

@media (max-width: 620px) {
  .ai-portal-body--app .ai-composer-modebar .ai-creation-control,
  .ai-workspace--chat .ai-composer-modebar .ai-creation-control {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .ai-portal-body--app .ai-composer-actions .ai-model-picker,
  .ai-workspace--chat .ai-composer-tools .ai-model-picker {
    width: 100%;
    max-width: none;
  }

  .ai-portal-body--app .ai-composer-actions .ai-attachment-button > span:last-child,
  .ai-workspace--chat .ai-composer-toolbar > .ai-attachment-button > span:last-child {
    display: none;
  }

  .ai-portal-body--app .ai-composer-actions .ai-attachment-button,
  .ai-workspace--chat .ai-composer-toolbar > .ai-attachment-button {
    width: 40px;
    height: 40px;
    min-width: 40px;
    min-height: 40px;
    padding: 0;
  }
}

@media (max-width: 620px) {
  html[data-ai-theme="dark"] .ai-portal-body--app .ai-nav {
    border-color: rgba(148, 163, 184, 0.22);
    background: rgba(13, 24, 41, 0.97);
  }

  html[data-ai-theme="dark"] .ai-portal-body--app .ai-nav > a.ai-nav-primary.active {
    background: rgba(59, 130, 246, 0.18);
  }

  html[data-ai-embedded="1"] .ai-portal-body--app .ai-main,
  .ai-portal-body--app.ai-portal-body--embedded .ai-main {
    height: 100vh;
    height: 100dvh;
  }
}