/* ── 4. Boot Screen ───────────────────────────────────────── */
.boot {
  min-height: var(--app-viewport-height);
  display: grid;
  place-content: center;
  justify-items: center;
  gap: var(--space-6);
  background: var(--gradient-workspace);
  color: var(--color-muted);
  position: relative;
  overflow: hidden;
}

.boot::before {
  content: "";
  position: absolute;
  top: -30%;
  left: 50%;
  transform: translateX(-50%);
  width: 120%;
  height: 60%;
  background: radial-gradient(ellipse at center, rgba(124, 58, 237, 0.08) 0%, transparent 65%);
  pointer-events: none;
}

.boot-mark {
  display: grid;
  place-items: center;
  width: 80px;
  height: 80px;
  border-radius: 22px;
  background: #fff;
  border: 1px solid var(--color-line);
  box-shadow: var(--shadow-md);
  position: relative;
  z-index: 1;
}

.boot-mark .brand-logo-svg { width: 40px; height: 40px; }

.boot-spinner {
  width: 28px;
  height: 28px;
  border: 2px solid rgba(255, 255, 255, 0.12);
  border-top-color: var(--color-brand);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.boot-text {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--color-text);
}

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

/* ── 5. Desktop Root & Window Chrome ────────────────────── */
.desktop-root {
  display: flex;
  flex-direction: column;
  height: var(--app-viewport-height);
  min-height: 0;
  background: var(--color-workspace);
}

.window-chrome {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--chrome-height);
  min-height: var(--chrome-height);
  padding: 0 var(--space-2) 0 var(--space-4);
  background: #f8fafc;
  border-bottom: 1px solid var(--color-sidebar-line);
  flex-shrink: 0;
  z-index: var(--z-chrome);
}

.window-drag-area {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex: 1;
  min-width: 0;
  height: 100%;
}

.window-brand-dot {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

.window-brand-dot .brand-logo-svg-sm { width: 18px; height: 18px; }

.window-title {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-width: 0;
  line-height: 1.2;
}

.window-title strong {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.window-version {
  font-size: 11px;
  font-weight: 600;
  color: var(--color-brand-dark);
  background: var(--color-brand-soft);
  border: 1px solid var(--color-brand-softer);
  border-radius: var(--radius-full);
  padding: 1px var(--space-2);
  white-space: nowrap;
}

.window-controls {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.win-btn {
  display: grid;
  place-items: center;
  width: 38px;
  height: 26px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-muted);
  line-height: 1;
  transition: background var(--duration-fast), color var(--duration-fast);
}

.win-btn svg {
  width: 12px;
  height: 12px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.4;
  stroke-linecap: round;
}

.win-btn:hover {
  background: var(--color-sidebar-hover);
  color: var(--color-text);
}

.win-btn.close:hover {
  background: var(--color-danger);
  color: #fff;
}

.resize-handles {
  position: fixed;
  inset: 0;
  pointer-events: none;
  /* 必须高于标题栏(--z-chrome:100)/顶栏(90)/侧栏(80)，否则顶部边角热区被盖住点不到；低于浮层(200)以免挡弹窗 */
  z-index: 150;
}

.resize-handles i {
  position: absolute;
  pointer-events: auto;
  /* 无边框窗口的 pywebview 拖动区会用原生 app-region:drag 抢占顶部鼠标，标记 no-drag 让边角热区拿回 mousedown */
  -webkit-app-region: no-drag;
  app-region: no-drag;
}

.resize-handles i[data-resize="n"] { top: 0; left: 14px; right: 14px; height: 6px; cursor: ns-resize; }
.resize-handles i[data-resize="s"] { bottom: 0; left: 14px; right: 14px; height: 6px; cursor: ns-resize; }
.resize-handles i[data-resize="e"] { right: 0; top: 14px; bottom: 14px; width: 6px; cursor: ew-resize; }
.resize-handles i[data-resize="w"] { left: 0; top: 14px; bottom: 14px; width: 6px; cursor: ew-resize; }
.resize-handles i[data-resize="nw"] { top: 0; left: 0; width: 14px; height: 14px; cursor: nwse-resize; }
.resize-handles i[data-resize="ne"] { top: 0; right: 0; width: 14px; height: 14px; cursor: nesw-resize; }
.resize-handles i[data-resize="se"] { bottom: 0; right: 0; width: 14px; height: 14px; cursor: nwse-resize; }
.resize-handles i[data-resize="sw"] { bottom: 0; left: 0; width: 14px; height: 14px; cursor: nesw-resize; }

.brand-logo-svg,
.brand-logo-svg-sm { display: block; }

/* logo 已替换为位图，统一约束尺寸并保持比例 */
.brand-logo-svg {
  width: 40px;
  height: 40px;
  object-fit: contain;
  border-radius: 8px;
}

.brand-logo-svg-sm {
  width: 18px;
  height: 18px;
  object-fit: contain;
  border-radius: 4px;
}

.login-brand .mark .brand-logo-svg { width: 44px; height: 44px; }
.login-panel-head .mark .brand-logo-svg-sm { width: 28px; height: 28px; }
.rail-brand .brand-mark .brand-logo-svg { width: 32px; height: 32px; }
.empty-symbol .brand-logo-svg { width: 48px; height: 48px; }

/* ── 6. Login Page ────────────────────────────────────────── */
.login-page {
  flex: 1;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  min-height: 0;
  overflow: auto;
}

.login-brand {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-6);
  padding: var(--space-12) var(--space-10);
  background: linear-gradient(135deg, #f5f3ff 0%, #e0f2fe 50%, #f8fafc 100%);
  color: var(--color-text);
  overflow: hidden;
}

.login-brand-glow {
  position: absolute;
  top: -20%;
  right: -10%;
  width: 70%;
  height: 80%;
  background: radial-gradient(ellipse at center, rgba(124, 58, 237, 0.28) 0%, rgba(14, 165, 233, 0.08) 35%, transparent 70%);
  pointer-events: none;
}

.login-brand::after {
  content: "";
  position: absolute;
  bottom: -20%;
  left: -15%;
  width: 50%;
  height: 60%;
  background: radial-gradient(ellipse at center, rgba(99, 102, 241, 0.15) 0%, transparent 65%);
  pointer-events: none;
}

.login-brand .mark {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  background: #fff;
  border: 1px solid var(--color-line);
  box-shadow: var(--shadow-sm);
}

.login-brand h1 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.login-brand h1 em {
  font-style: normal;
  color: var(--color-brand);
  font-weight: 600;
  font-size: 0.55em;
  display: block;
  margin-top: var(--space-2);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.login-brand > p {
  max-width: 480px;
  color: var(--color-muted);
  font-size: 16px;
  line-height: 1.7;
}

.login-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.login-tags span {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-full);
  background: #fff;
  border: 1px solid var(--color-line);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-muted);
}

.login-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  max-width: 520px;
}

.login-metrics > span {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: #fff;
  border: 1px solid var(--color-line);
  box-shadow: var(--shadow-xs);
}

.login-metrics b {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
}

.login-metrics small {
  font-size: 12px;
  color: var(--color-muted);
}

.login-panel {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-6);
  padding: var(--space-10) clamp(var(--space-6), 6vw, var(--space-12));
  background: var(--color-surface);
}

.login-panel-head {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.login-panel-head .mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--color-brand-soft);
  border: 1px solid rgba(124, 58, 237, 0.2);
}

.login-panel-head h2 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.login-panel-head p {
  margin-top: var(--space-1);
  color: var(--color-muted);
  font-size: 13px;
}

.login-kick-notice {
  padding: 10px 14px;
  border-radius: var(--radius-md, 10px);
  background: rgba(220, 64, 64, 0.08);
  border: 1px solid rgba(220, 64, 64, 0.35);
  color: #c0392b;
  font-size: 13px;
  line-height: 1.5;
}

.agreement-row {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: 13px;
  color: var(--color-muted);
  cursor: pointer;
}

.agreement-row input { margin-top: 3px; flex-shrink: 0; }
.agreement-row button {
  border: none;
  background: none;
  padding: 0;
  color: var(--color-brand);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ── 7. Studio Layout ─────────────────────────────────────── */
.studio {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.studio-grid {
  display: grid;
  grid-template-columns: var(--rail-width) 1fr;
  flex: 1;
  min-height: 0;
  overflow: hidden;
  transition: grid-template-columns var(--duration-normal) var(--ease-out);
}

/* 左侧 hover 触发热区：默认隐藏，仅桌面收起态启用 */
.rail-hover-trigger { display: none; }

/* 桌面端收起侧栏：列宽归零（移动端 ≤768 走抽屉逻辑，不受影响） */
@media (min-width: 769px) {
  .studio-grid.rail-collapsed {
    grid-template-columns: 0 1fr;
    position: relative;
  }

  /* 收起态：rail 与热区都脱离网格流，需让内容区显式占满整行，
     否则它会被自动放进 0 宽的第一列而被裁掉（只隐藏菜单栏，不隐藏内容） */
  .studio-grid.rail-collapsed .workspace {
    grid-column: 1 / -1;
  }

  /* 收起态：rail 变浮层，默认滑出屏幕外，鼠标移到左侧热区或 rail 自身时滑入 */
  .studio-grid.rail-collapsed .rail {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--rail-width);
    transform: translateX(-100%);
    transition: transform var(--duration-normal) var(--ease-out);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-rail);
  }

  /* 左侧 hover 触发热区，仅收起态出现 */
  .studio-grid.rail-collapsed .rail-hover-trigger {
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 24px;
    z-index: calc(var(--z-rail) - 1);
  }

  /* 收起态左侧可见的「把手」提示：让用户知道往哪移、也更容易命中 */
  .studio-grid.rail-collapsed .rail-hover-trigger::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
    width: 4px;
    height: 52px;
    border-radius: 0 var(--radius-full) var(--radius-full) 0;
    background: var(--color-brand);
    opacity: 0.45;
    transition: opacity var(--duration-fast) var(--ease-out),
                height var(--duration-fast) var(--ease-out),
                width var(--duration-fast) var(--ease-out);
  }

  .studio-grid.rail-collapsed .rail-hover-trigger:hover::before {
    opacity: 0.95;
    height: 80px;
    width: 5px;
  }

  /* 热区或 rail 自身被 hover 时，菜单栏滑入；移开即滑出隐藏 */
  .studio-grid.rail-collapsed .rail-hover-trigger:hover ~ .rail,
  .studio-grid.rail-collapsed .rail:hover {
    transform: translateX(0);
  }
}

.workspace {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  overflow: auto;
  background: var(--gradient-workspace);
  padding: var(--space-5) var(--space-6) 0;
}

/* flex/grid 纵向滚动容器的 padding-bottom / 末元素 margin-bottom 在部分 Chromium/WebView2
   版本（尤其 Windows 高 DPI 缩放）不计入可滚动高度，导致页面与弹窗滑不到最底部；
   统一用 flex-shrink:0 / 整行的尾部占位块兜底，保证各内核、各缩放比都能滑到最底。 */
.workspace::after,
.cover-frame-body::after,
.industry-picker-list::after,
.preset-grid::after,
.subtitle-preset-grid::after,
.render-advanced-body::after,
.asset-duration-body::after,
.voice-upload-body::after,
.script-ai-body::after,
.copy-advanced-modal-body::after,
.batch-help-body::after,
.copy-history-list::after,
.publish-account-detail::after,
.home-project-list::after,
.home-output-list::after {
  content: "";
  display: block;
  flex: 0 0 auto;
  grid-column: 1 / -1;
  min-height: calc(var(--space-8) + env(safe-area-inset-bottom, 0px));
}

/* ── 8. Topbar ────────────────────────────────────────────── */
.topbar {
  flex-shrink: 0;
  height: var(--topbar-height);
  /* 半透明实色替代 backdrop-filter：常驻顶栏的实时模糊在 WebView2 中持续占用合成开销 */
  background: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid rgba(224, 228, 239, 0.8);
  z-index: var(--z-topbar);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  height: 100%;
  padding: 0 var(--space-4) 0 var(--space-4);
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  min-width: 0;
  flex: 1;
}

.topbar-center {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.top-project-switch,
.industry-switch {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-width: 0;
}

.top-project-switch label,
.industry-switch label {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-faint);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  flex-shrink: 0;
}

.top-project-switch select,
.industry-switch select {
  min-width: 120px;
  max-width: 200px;
}

/* ── 顶栏工作台切换组（脚本 + 新建 + 行业） ───────────────── */
.workspace-bar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 4px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-surface-soft);
  min-width: 0;
}

.ws-field {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-width: 0;
}

.ws-field > label {
  flex-shrink: 0;
  padding-left: var(--space-2);
  font-size: 11px;
  font-weight: 700;
  color: var(--color-faint);
  letter-spacing: 0.04em;
}

.ws-picker {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 38px;
  max-width: min(220px, 36vw);
  padding: 0 var(--space-3);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  transition: border-color var(--duration-fast), box-shadow var(--duration-fast), background var(--duration-fast);
}

.ws-picker:hover {
  border-color: rgba(124, 58, 237, 0.35);
  background: var(--color-brand-soft);
}

.ws-picker:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

.ws-picker-value {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ws-divider {
  width: 1px;
  height: 22px;
  flex-shrink: 0;
  background: var(--color-line);
}

.ws-new-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
  min-height: 38px;
  padding: 0 var(--space-4);
  border: none;
  border-radius: var(--radius-md);
  background: var(--color-brand);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(124, 58, 237, 0.28);
  transition: transform var(--duration-fast), box-shadow var(--duration-fast), background var(--duration-fast);
}

.ws-new-btn:hover {
  background: var(--color-brand-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(124, 58, 237, 0.36);
}

.ws-plus {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  stroke-width: 2.4;
  stroke-linecap: round;
  flex-shrink: 0;
}

.industry-picker-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 40px;
  max-width: min(220px, 42vw);
  padding: 0 var(--space-3);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  font-weight: 600;
  font-size: 13px;
  transition: border-color var(--duration-fast), box-shadow var(--duration-fast), background var(--duration-fast);
}

.industry-picker-btn:hover {
  border-color: rgba(124, 58, 237, 0.35);
  background: var(--color-brand-soft);
}

.industry-picker-btn:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

.industry-picker-value {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.industry-picker-caret {
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--color-muted);
  border-bottom: 2px solid var(--color-muted);
  transform: rotate(45deg) translateY(-2px);
  flex-shrink: 0;
}

.quick-create {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-width: 0;
}

.premium-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
  min-height: 34px;
  padding: 0 var(--space-4);
  border: none;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, #f59e0b 0%, #f43f5e 55%, #7c3aed 100%);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  box-shadow: 0 4px 14px rgba(244, 63, 94, 0.35);
  transition: transform var(--duration-fast) var(--ease-out), box-shadow var(--duration-fast);
  animation: premium-btn-glow 1.8s ease-in-out infinite;
}

.premium-btn-label {
  white-space: nowrap;
}

.premium-btn-trial {
  display: inline-flex;
  align-items: center;
  padding: 1px 8px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, #fff7cc 0%, #fde047 45%, #fb923c 100%);
  color: #7c2d12;
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.01em;
  line-height: 1.6;
  white-space: nowrap;
  box-shadow: 0 1px 6px rgba(124, 45, 18, 0.35);
  animation: premium-trial-pulse 1.15s ease-in-out infinite;
}

@keyframes premium-btn-glow {
  0%, 100% { box-shadow: 0 4px 14px rgba(244, 63, 94, 0.35); }
  50% { box-shadow: 0 6px 22px rgba(244, 63, 94, 0.7), 0 0 0 4px rgba(245, 158, 11, 0.28); }
}

@keyframes premium-trial-pulse {
  0%, 100% { transform: scale(1); box-shadow: 0 1px 6px rgba(124, 45, 18, 0.35); }
  50% { transform: scale(1.09); box-shadow: 0 2px 11px rgba(251, 146, 60, 0.85); }
}

.premium-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(244, 63, 94, 0.45);
  animation-play-state: paused;
}

.premium-btn:active {
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .premium-btn,
  .premium-btn-trial {
    animation: none;
  }
}

.premium-btn svg {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linejoin: round;
}

.demand-wall-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
  min-height: 34px;
  padding: 0 var(--space-4);
  border: none;
  border-radius: var(--radius-full);
  background: var(--gradient-brand);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  box-shadow: var(--shadow-brand);
  transition: transform var(--duration-fast) var(--ease-out), box-shadow var(--duration-fast), filter var(--duration-fast);
}

.demand-wall-btn .nav-icon {
  display: inline-flex;
  width: 16px;
  height: 16px;
}

.demand-wall-btn .nav-icon svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.demand-wall-btn:hover {
  transform: translateY(-1px);
  filter: brightness(1.08);
  box-shadow: 0 6px 18px rgba(124, 58, 237, 0.45);
}

.demand-wall-btn:active {
  transform: translateY(0);
}

.demand-wall-btn.active {
  filter: brightness(1.1);
  box-shadow: 0 0 0 2px var(--color-surface), 0 0 0 4px rgba(124, 58, 237, 0.55);
}

.user-chip {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.user-chip-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  line-height: 1.25;
}

.user-chip-meta small {
  font-size: 11px;
  color: var(--color-faint);
}

.user-chip-meta strong {
  font-size: 13px;
  font-weight: 600;
}

.user-avatar {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--gradient-brand);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  border: none;
  box-shadow: var(--shadow-brand);
}

/* 桌面端侧栏收起/展开按钮（移动端隐藏，交给抽屉式 menu-toggle） */
.rail-collapse-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-muted);
  transition: color var(--duration-fast), border-color var(--duration-fast), background var(--duration-fast);
}

.rail-collapse-btn:hover {
  color: var(--color-brand);
  border-color: var(--color-brand);
  background: var(--color-brand-soft);
}

.rail-collapse-btn.is-collapsed {
  color: var(--color-brand);
  border-color: rgba(124, 58, 237, 0.35);
  background: var(--color-brand-soft);
}

@media (max-width: 768px) {
  .rail-collapse-btn { display: none; }
}

/* ── 9. Menu Toggle & Rail Overlay (Mobile) ──────────────── */
.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  min-width: 44px;
  min-height: 44px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  flex-shrink: 0;
  transition: background var(--duration-fast), border-color var(--duration-fast);
}

.menu-toggle:hover {
  background: var(--color-surface-soft);
  border-color: var(--color-line-strong);
}

.menu-toggle::before,
.menu-toggle::after,
.menu-toggle span {
  content: "";
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform var(--duration-normal) var(--ease-out);
}

.menu-toggle {
  flex-direction: column;
  gap: 5px;
}

.rail-overlay {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-rail) - 1);
  background: rgba(15, 23, 42, 0.35);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-normal) var(--ease-out);
}

body.rail-open .rail-overlay,
.studio-grid.rail-open .rail-overlay {
  opacity: 1;
  pointer-events: auto;
}

/* ── 10. Workflow Bar ─────────────────────────────────────── */
.workflow-bar {
  flex-shrink: 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-line);
  overflow: hidden;
}

.workflow-bar-hidden { display: none !important; }

.workflow-track {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-4);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.workflow-track::-webkit-scrollbar { display: none; }

.workflow-step {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-full);
  background: var(--color-surface-soft);
  color: var(--color-text);
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
  transition: background var(--duration-fast), color var(--duration-fast), border-color var(--duration-fast);
}

.workflow-step:hover {
  border-color: rgba(124, 58, 237, 0.4);
  background: var(--color-brand-soft);
  color: var(--color-text);
}

.workflow-step.active {
  background: var(--gradient-brand);
  border-color: transparent;
  color: #fff;
  font-weight: 700;
  box-shadow: 0 2px 8px rgba(124, 58, 237, 0.35);
}

.workflow-step.done {
  border-color: rgba(8, 145, 178, 0.35);
  background: var(--color-cyan-soft);
  color: var(--color-cyan);
}

.workflow-step.done.active {
  background: var(--gradient-brand);
  border-color: transparent;
  color: #fff;
}

.workflow-step-num {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: var(--radius-full);
  background: var(--color-surface);
  border: 1px solid var(--color-line-strong);
  font-size: 11px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.workflow-step.active .workflow-step-num {
  background: rgba(255, 255, 255, 0.22);
  border-color: transparent;
  color: #fff;
}

.workflow-step.done .workflow-step-num {
  background: var(--color-cyan);
  border-color: transparent;
  color: #fff;
}

.workflow-step.done.active .workflow-step-num {
  background: rgba(255, 255, 255, 0.22);
  color: #fff;
}

.workflow-connector {
  display: block;
  width: 14px;
  height: 2px;
  border-radius: var(--radius-full);
  background: var(--color-line-strong);
  flex-shrink: 0;
}

.workflow-connector.done { background: var(--color-cyan); }

/* ── 11. Sidebar Rail ───────────────────────────────────── */
.rail {
  display: flex;
  flex-direction: column;
  background: var(--gradient-sidebar);
  border-right: 1px solid var(--color-sidebar-line);
  overflow-y: auto;
  overflow-x: hidden;
  min-width: 0;
  min-height: 0;
  z-index: var(--z-rail);
}

.rail-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-4) var(--space-3);
  border-bottom: 1px solid var(--color-sidebar-line);
}

.rail-brand .brand-mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.rail-brand strong {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-sidebar-text);
  letter-spacing: -0.01em;
}

.rail-brand small {
  display: block;
  font-size: 12px;
  color: var(--color-sidebar-muted);
  margin-top: 2px;
}

.rail-progress {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-sidebar-line);
}

.rail-progress-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-2);
  font-size: 13px;
  color: var(--color-sidebar-muted);
}

.rail-progress-head b {
  color: var(--color-brand);
  font-variant-numeric: tabular-nums;
}

.rail-progress-bar {
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-sidebar-line);
  overflow: hidden;
}

.rail-progress-bar i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--gradient-brand);
  transition: width var(--duration-slow) var(--ease-out);
}

.nav-section-title {
  padding: var(--space-4) var(--space-4) var(--space-2);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-sidebar-muted);
}

.step-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: 0 var(--space-2) var(--space-3);
}

.step-nav button {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  min-height: 48px;
  padding: var(--space-3) var(--space-4);
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  background: transparent;
  color: var(--color-sidebar-text);
  font-size: var(--font-size-nav);
  font-weight: 500;
  text-align: left;
  transition: background var(--duration-fast), color var(--duration-fast), border-color var(--duration-fast);
}

.step-nav button:hover {
  background: var(--color-sidebar-hover);
  color: var(--color-text);
}

.step-nav button.active {
  background: var(--color-brand-soft);
  border-color: rgba(124, 58, 237, 0.25);
  color: var(--color-brand-darker);
  font-weight: 700;
}

.step-nav button.done:not(.active) {
  color: var(--color-cyan);
}

.nav-icon,
.nav-step {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  background: var(--color-sidebar-soft);
  border: 1px solid var(--color-sidebar-line);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-sidebar-muted);
}

.step-nav button.active .nav-step,
.step-nav button.active .nav-icon {
  background: var(--gradient-brand);
  color: #fff;
  box-shadow: 0 2px 8px rgba(124, 58, 237, 0.4);
}

.nav-icon svg {
  width: 15px;
  height: 15px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.step-nav button.done .nav-step {
  background: var(--color-cyan-soft);
  border-color: rgba(14, 165, 233, 0.25);
  color: var(--color-cyan-dark);
}

.tool-nav button { padding-left: var(--space-3); }

/* 创作流程单入口（取代左栏 7 步重复列表） */
.nav-flow { align-items: center; }
.nav-flow-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
  flex: 1;
}
.nav-flow-text b {
  font-size: var(--font-size-nav);
  line-height: 1.2;
}
.nav-flow-text small {
  font-size: 11px;
  font-weight: 500;
  color: var(--color-sidebar-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.nav-flow.active .nav-flow-text small { color: var(--color-brand-dark); }
.nav-flow-badge {
  flex-shrink: 0;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: var(--color-sidebar-soft);
  border: 1px solid var(--color-sidebar-line);
  font-size: 11px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--color-sidebar-muted);
}
.nav-flow.active .nav-flow-badge {
  background: var(--gradient-brand);
  border-color: transparent;
  color: #fff;
}