/* 91COST 本地空白设计页：自有视觉与组件，只借鉴通用 BIM/CAD 信息架构。 */

.fresh-air-workbench {
  --design-top: 58px;
  --design-rail: 52px;
  --design-library: 360px;
  --design-side: 240px;
  --design-line: #d8dde1;
  --design-line-strong: #c4cbd0;
  --design-surface: #fff;
  --design-subtle: #f5f7f8;
  --design-canvas: #cacaca;
  --design-ink: #2b3136;
  --design-muted: #707980;
  --design-accent: #1596cb;
  --design-accent-soft: #e8f5fb;
  inset: 0;
  border: 0;
  border-radius: 0;
  color: var(--design-ink);
  background: var(--design-canvas);
  box-shadow: none;
}

.fresh-air-workbench[hidden] { display: none !important; }

body[data-ui-theme="dark"] .fresh-air-workbench {
  --design-line: #343c43;
  --design-line-strong: #46515a;
  --design-surface: #20262b;
  --design-subtle: #282f35;
  --design-canvas: #3b3f42;
  --design-ink: #ecf1f4;
  --design-muted: #a0aab1;
  --design-accent: #35b8ec;
  --design-accent-soft: #183c4b;
}

/* 顶部：品牌 / 命令 / 本地状态 */
.fresh-air-workbench .fa-commandbar {
  z-index: 100;
  inset: 0 0 auto;
  height: var(--design-top);
  grid-template-columns: 250px minmax(560px, 1fr) auto;
  border: 0;
  border-bottom: 1px solid var(--design-line);
  border-radius: 0;
  color: var(--design-ink);
  background: var(--design-surface);
  box-shadow: 0 2px 8px rgba(30, 38, 44, .08);
  backdrop-filter: none;
}

.fresh-air-workbench .fa-brand-block {
  gap: 10px;
  padding: 4px 15px;
  border-right: 1px solid var(--design-line);
  background: var(--design-surface);
}

.fresh-air-workbench .fa-brand-block::after { display: none; }
.fresh-air-workbench .fa-brand-block img {
  width: 34px;
  height: 34px;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.fresh-air-workbench .fa-brand-block strong { color: var(--design-accent); font-size: 13px; }
.fresh-air-workbench .fa-brand-block small {
  max-width: 172px;
  overflow: hidden;
  color: var(--design-ink);
  font-size: 11px;
  font-weight: 600;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.fresh-air-workbench .fa-command-scroll {
  min-width: 0;
  align-items: stretch;
  padding: 0 6px;
  overflow-x: auto;
  scrollbar-width: none;
}
.fresh-air-workbench .fa-command-scroll::-webkit-scrollbar { display: none; }
.fresh-air-workbench .fa-command-group {
  height: 58px;
  gap: 0;
  padding: 0 3px;
  border-right: 1px solid var(--design-line);
}

.fresh-air-workbench .fa-command-group button,
.fresh-air-workbench .fa-command-group .fa-cfd-viewer-link,
.fresh-air-workbench .fa-command-actions button {
  min-width: 48px;
  height: 57px;
  gap: 1px;
  padding: 4px 6px 3px;
  border: 0;
  border-radius: 0;
  color: var(--design-ink);
  background: transparent;
}

.fresh-air-workbench .fa-command-group .fa-cfd-viewer-link {
  display: grid;
  place-items: center;
  min-width: 52px;
  text-decoration: none;
}

.fresh-air-workbench .fa-command-group button i,
.fresh-air-workbench .fa-command-group .fa-cfd-viewer-link i,
.fresh-air-workbench .fa-command-actions button i {
  min-width: 26px;
  height: 27px;
  border: 0;
  border-radius: 0;
  color: #58636a;
  background: transparent;
  font-size: 18px;
  font-style: normal;
}

body[data-ui-theme="dark"] .fresh-air-workbench .fa-command-group button i,
body[data-ui-theme="dark"] .fresh-air-workbench .fa-command-actions button i { color: #c7d0d6; }
.fresh-air-workbench .fa-command-group button span,
.fresh-air-workbench .fa-command-group .fa-cfd-viewer-link span,
.fresh-air-workbench .fa-command-actions button span { color: currentColor; font-size: 10px; line-height: 1; }
.fresh-air-workbench .fa-command-group button:hover,
.fresh-air-workbench .fa-command-group .fa-cfd-viewer-link:hover,
.fresh-air-workbench .fa-command-group button.is-active,
.fresh-air-workbench .fa-command-actions button:hover { color: var(--design-accent); background: var(--design-accent-soft); }
.fresh-air-workbench .fa-command-group button:disabled { display: grid !important; opacity: .34; background: transparent; }

.fresh-air-workbench .fa-command-actions {
  height: 58px;
  align-items: center;
  gap: 0;
  padding: 0 4px 0 10px;
  border: 0;
  border-left: 1px solid var(--design-line);
  background: var(--design-surface);
}

.fresh-air-workbench .fa-local-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-right: 5px;
  padding: 6px 9px;
  border: 1px solid var(--design-line);
  border-radius: 999px;
  color: var(--design-muted);
  font-size: 10px;
  white-space: nowrap;
}

.fresh-air-workbench .fa-local-badge i,
.fresh-air-workbench .fa-design-library > footer i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #32ad73;
  box-shadow: 0 0 0 3px rgba(50, 173, 115, .12);
}

.fresh-air-workbench .fa-solarbar,
.fresh-air-workbench .engineering-module-switcher,
.fresh-air-workbench .fa-spatial-switch,
.fresh-air-workbench .fa-three-guide { display: none !important; }

/* 左侧一级资源栏 */
.fresh-air-workbench .fa-resource-rail {
  z-index: 80;
  top: var(--design-top);
  bottom: 0;
  left: 0;
  width: var(--design-rail);
  gap: 1px;
  padding: 7px 3px;
  overflow: hidden;
  border: 0;
  border-right: 1px solid var(--design-line);
  border-radius: 0;
  background: var(--design-surface);
  box-shadow: none;
}

.fresh-air-workbench .fa-resource-rail button {
  min-height: 62px;
  gap: 3px;
  padding: 4px 1px;
  border: 0;
  border-radius: 0;
  color: var(--design-muted);
  background: transparent;
}

.fresh-air-workbench .fa-resource-rail button i {
  width: 31px;
  height: 31px;
  border: 0;
  border-radius: 50%;
  color: currentColor;
  background: transparent;
  box-shadow: none;
  font-size: 18px;
  font-style: normal;
}

.fresh-air-workbench .fa-resource-rail button span { font-size: 10px; }
.fresh-air-workbench .fa-resource-rail button:hover,
.fresh-air-workbench .fa-resource-rail button.is-active { color: var(--design-accent); background: var(--design-accent-soft); }
.fresh-air-workbench .fa-resource-rail button:hover i,
.fresh-air-workbench .fa-resource-rail button.is-active i { color: inherit; background: transparent; box-shadow: none; }

/* 左侧二级构件库 */
.fa-design-library {
  position: absolute;
  z-index: 76;
  top: var(--design-top);
  bottom: 0;
  left: var(--design-rail);
  width: var(--design-library);
  display: grid;
  grid-template-rows: 42px 48px minmax(0, 1fr) 34px;
  border-right: 1px solid var(--design-line);
  color: var(--design-ink);
  background: var(--design-surface);
  box-shadow: 4px 0 10px rgba(25, 34, 40, .04);
  pointer-events: auto;
  transition: transform 180ms ease;
}

.fa-library-tabs { display: grid; grid-template-columns: repeat(2, 1fr); border-bottom: 1px solid var(--design-line); }
.fa-library-tabs button {
  position: relative;
  border: 0;
  color: var(--design-ink);
  background: transparent;
  font-size: 12px;
  cursor: pointer;
}
.fa-library-tabs button::after {
  content: "";
  position: absolute;
  right: 18px;
  bottom: 0;
  left: 18px;
  height: 2px;
  background: transparent;
}
.fa-library-tabs button:hover,
.fa-library-tabs button.is-active { color: var(--design-accent); }
.fa-library-tabs button.is-active::after { background: var(--design-accent); }

.fa-library-search {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 8px 12px 5px;
  padding: 0 10px;
  border: 1px solid var(--design-line);
  border-radius: 3px;
  color: var(--design-muted);
  background: var(--design-subtle);
}
.fa-library-search i { font-size: 16px; font-style: normal; }
.fa-library-search input {
  min-width: 0;
  width: 100%;
  height: 32px;
  border: 0;
  outline: 0;
  color: var(--design-ink);
  background: transparent;
  font-size: 11px;
}

.fa-library-scroll { overflow: auto; padding: 4px 14px 22px; scrollbar-width: thin; }
.fa-library-group { padding: 8px 0 12px; border-bottom: 1px solid var(--design-line); }
.fa-library-group > header {
  min-height: 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 7px;
}
.fa-library-group > header strong { font-size: 12px; }
.fa-library-group > header small { color: var(--design-muted); font-size: 9px; }
.fa-room-preset-grid,
.fa-component-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px; }
.fa-room-preset-grid button,
.fa-component-grid button {
  min-width: 0;
  min-height: 88px;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 8px;
  padding: 8px 4px;
  border: 1px solid transparent;
  border-radius: 2px;
  color: var(--design-ink);
  background: var(--design-subtle);
  cursor: pointer;
}
.fa-room-preset-grid button i,
.fa-component-grid button i {
  width: 48px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid var(--design-line-strong);
  color: #345063;
  background: var(--design-surface);
  font-size: 18px;
  font-style: normal;
}
body[data-ui-theme="dark"] .fa-room-preset-grid button i,
body[data-ui-theme="dark"] .fa-component-grid button i { color: #bcd0db; }
.fa-room-preset-grid button span,
.fa-component-grid button span { overflow: hidden; max-width: 100%; font-size: 10px; text-overflow: ellipsis; white-space: nowrap; }
.fa-room-preset-grid button:hover,
.fa-room-preset-grid button.is-active { border-color: var(--design-accent); color: var(--design-accent); background: var(--design-accent-soft); }
.fa-component-grid button:disabled { opacity: .56; cursor: not-allowed; }

.fa-library-overview {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 0 10px;
  border-bottom: 1px solid var(--design-line);
}
.fa-library-overview > span { display: grid; gap: 3px; }
.fa-library-overview strong { font-size: 12px; }
.fa-library-overview small { color: var(--design-muted); font-size: 9px; line-height: 1.45; }
.fa-library-overview > b {
  flex: 0 0 auto;
  padding: 4px 7px;
  border-radius: 999px;
  color: var(--design-accent);
  background: var(--design-accent-soft);
  font-size: 9px;
}

.fa-resource-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
  padding: 10px 0 4px;
}
.fa-resource-card {
  position: relative;
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--design-line);
  border-radius: 5px;
  background: var(--design-subtle);
  transition: border-color 140ms ease, box-shadow 140ms ease, transform 140ms ease;
}
.fa-resource-card:hover {
  border-color: color-mix(in srgb, var(--design-accent) 60%, var(--design-line));
  box-shadow: 0 7px 18px rgba(27, 45, 56, .09);
  transform: translateY(-1px);
}
.fa-resource-card > button[data-library-resource] {
  width: 100%;
  min-height: 126px;
  display: grid;
  grid-template-rows: 62px auto;
  gap: 7px;
  padding: 10px 9px 9px;
  border: 0;
  color: var(--design-ink);
  background: transparent;
  text-align: left;
  cursor: pointer;
}
.fa-resource-preview {
  display: grid;
  place-items: center;
  border: 1px solid var(--design-line);
  border-radius: 3px;
  color: #35576a;
  background:
    linear-gradient(90deg, transparent 49%, color-mix(in srgb, var(--design-line) 45%, transparent) 50%, transparent 51%),
    linear-gradient(transparent 49%, color-mix(in srgb, var(--design-line) 45%, transparent) 50%, transparent 51%),
    var(--design-surface);
  background-size: 18px 18px;
  font-size: 22px;
  font-style: normal;
  font-weight: 750;
}
body[data-ui-theme="dark"] .fa-resource-preview { color: #b9d7e5; }
.fa-resource-copy { min-width: 0; display: grid; gap: 3px; }
.fa-resource-copy strong { overflow: hidden; font-size: 10px; text-overflow: ellipsis; white-space: nowrap; }
.fa-resource-copy small { color: var(--design-muted); font-size: 8px; line-height: 1.4; }
.fa-resource-meta { display: flex; align-items: center; gap: 4px; margin-top: 2px; }
.fa-resource-meta b {
  padding: 2px 4px;
  border-radius: 2px;
  color: var(--design-muted);
  background: color-mix(in srgb, var(--design-line) 45%, transparent);
  font-size: 7px;
  font-weight: 650;
}
.fa-resource-favorite {
  position: absolute;
  z-index: 2;
  top: 14px;
  right: 13px;
  width: 25px;
  height: 25px;
  display: grid;
  place-items: center;
  border: 1px solid var(--design-line);
  border-radius: 50%;
  color: var(--design-muted);
  background: color-mix(in srgb, var(--design-surface) 92%, transparent);
  box-shadow: 0 2px 7px rgba(20, 32, 39, .1);
  cursor: pointer;
}
.fa-resource-favorite:hover,
.fa-resource-favorite.is-active { color: #e0872f; border-color: #efb270; background: #fff7ec; }
body[data-ui-theme="dark"] .fa-resource-favorite.is-active { background: #4b351f; }
.fa-library-boundary {
  margin-top: 11px;
  padding: 10px 11px;
  border: 1px dashed var(--design-line-strong);
  border-radius: 4px;
  color: var(--design-muted);
  background: color-mix(in srgb, var(--design-subtle) 72%, transparent);
}
.fa-library-boundary strong { display: block; margin-bottom: 4px; color: var(--design-ink); font-size: 9px; }
.fa-library-boundary p { margin: 0; font-size: 8px; line-height: 1.55; }
.fa-library-empty.is-compact { min-height: 220px; }

.fa-library-empty {
  min-height: 240px;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 9px;
  padding: 28px;
  color: var(--design-muted);
  text-align: center;
}
.fa-library-empty[hidden],
[data-design-library-content][hidden] { display: none !important; }
.fa-library-empty > i { font-size: 32px; font-style: normal; }
.fa-library-empty strong { color: var(--design-ink); font-size: 13px; }
.fa-library-empty p { margin: 0; font-size: 10px; line-height: 1.6; }
.fa-design-library > footer {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 14px;
  border-top: 1px solid var(--design-line);
  color: var(--design-muted);
  font-size: 9px;
}

.fa-library-collapse {
  position: absolute;
  top: 46%;
  right: -14px;
  width: 28px;
  height: 42px;
  border: 1px solid var(--design-line);
  border-radius: 0 5px 5px 0;
  color: var(--design-muted);
  background: var(--design-surface);
  box-shadow: 3px 0 8px rgba(26, 34, 40, .08);
  font-size: 22px;
  cursor: pointer;
}
.fresh-air-workbench.is-library-collapsed .fa-design-library { transform: translateX(calc(-1 * var(--design-library))); }
.fresh-air-workbench.is-library-collapsed .fa-library-collapse { right: -28px; transform: rotate(180deg); }

/* 中央设计画布 */
.fresh-air-workbench .fa-plan-stage {
  z-index: 40;
  top: var(--design-top);
  right: var(--design-side);
  bottom: 0;
  left: calc(var(--design-rail) + var(--design-library));
  overflow: hidden;
  border: 0;
  border-radius: 0;
  background: var(--design-canvas);
  box-shadow: none;
  transition: left 180ms ease;
}
.fresh-air-workbench.is-library-collapsed .fa-plan-stage { left: var(--design-rail); }
.fresh-air-workbench .fa-plan-stage > header { display: none; }
.fresh-air-workbench #fa-plan-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  color: #aab0b4;
  background: transparent;
  touch-action: none;
}
body[data-ui-theme="dark"] .fresh-air-workbench #fa-plan-svg { color: #60676c; }
.fresh-air-workbench .fa-plan-grid { opacity: .8; }
.fresh-air-workbench .fa-plan-stage::before,
.fresh-air-workbench .fa-plan-stage::after {
  content: "";
  position: absolute;
  z-index: 1;
  pointer-events: none;
  background: rgba(92, 101, 107, .2);
}
.fresh-air-workbench .fa-plan-stage::before { top: 0; bottom: 0; left: 50%; width: 1px; }
.fresh-air-workbench .fa-plan-stage::after { top: 50%; right: 0; left: 0; height: 1px; }
.fresh-air-workbench .fa2d-room rect,
.fresh-air-workbench .fa2d-room polygon {
  fill: rgba(250, 252, 252, .9);
  stroke: #27333a;
  stroke-width: 3;
  filter: drop-shadow(0 2px 3px rgba(24, 31, 35, .16));
}
body[data-ui-theme="dark"] .fresh-air-workbench .fa2d-room rect,
body[data-ui-theme="dark"] .fresh-air-workbench .fa2d-room polygon { fill: rgba(40, 49, 55, .94); stroke: #d3dde2; }
.fresh-air-workbench .fa2d-room-draft {
  fill: rgba(21, 150, 203, .12);
  stroke: var(--design-accent);
  stroke-width: 2;
  stroke-dasharray: 8 5;
  vector-effect: non-scaling-stroke;
}
.fresh-air-workbench .fa2d-room-draft-label {
  fill: var(--design-accent);
  font-size: 12px;
  font-weight: 700;
  paint-order: stroke;
  stroke: var(--design-surface);
  stroke-width: 4px;
}
body[data-fa-plan-interaction="room"] .fresh-air-workbench #fa-plan-svg { cursor: crosshair; }
body[data-fa-plan-interaction="wall"] .fresh-air-workbench #fa-plan-svg { cursor: crosshair; }
body[data-fa-plan-interaction="opening"] .fresh-air-workbench #fa-plan-svg { cursor: cell; }

.fresh-air-workbench .fa2d-wall-body {
  stroke: #25353c;
  stroke-linecap: square;
  stroke-linejoin: miter;
  pointer-events: none;
}
.fresh-air-workbench .fa2d-wall.is-interior .fa2d-wall-body { stroke: #53636a; }
body[data-ui-theme="dark"] .fresh-air-workbench .fa2d-wall-body { stroke: #d7e1e5; }
body[data-ui-theme="dark"] .fresh-air-workbench .fa2d-wall.is-interior .fa2d-wall-body { stroke: #aebbc0; }
.fresh-air-workbench .fa2d-wall-hit {
  fill: transparent;
  stroke: none;
  pointer-events: all;
  cursor: pointer;
}
.fresh-air-workbench .fa2d-wall.is-selected .fa2d-wall-body {
  stroke: var(--design-accent);
  filter: drop-shadow(0 0 4px color-mix(in srgb, var(--design-accent) 48%, transparent));
}
.fresh-air-workbench .fa2d-wall-dimension,
.fresh-air-workbench .fa2d-wall-draft-label {
  fill: var(--design-accent);
  font-size: 12px;
  font-weight: 750;
  paint-order: stroke;
  pointer-events: none;
  stroke: var(--design-surface);
  stroke-width: 4px;
}
.fresh-air-workbench .fa2d-wall-draft {
  stroke: var(--design-accent);
  stroke-linecap: square;
  stroke-dasharray: 9 5;
  opacity: .86;
  pointer-events: none;
}
.fresh-air-workbench .fa2d-wall-draft.is-interior { stroke: #e08b34; }
.fresh-air-workbench .fa2d-wall-anchor {
  fill: var(--design-surface);
  stroke: var(--design-accent);
  stroke-width: 3;
  vector-effect: non-scaling-stroke;
}
.fresh-air-workbench .fa2d-wall-snap {
  fill: color-mix(in srgb, var(--design-accent) 22%, var(--design-surface));
  stroke: var(--design-accent);
  stroke-width: 2;
  vector-effect: non-scaling-stroke;
  pointer-events: none;
}
.fresh-air-workbench .fa2d-wall-snap.is-wall {
  fill: var(--design-accent);
  stroke: #fff;
}

.fresh-air-workbench .fa2d-opening-cut {
  stroke: var(--design-surface);
  stroke-linecap: butt;
  pointer-events: none;
}
.fresh-air-workbench .fa2d-opening-window-line,
.fresh-air-workbench .fa2d-opening-door-leaf {
  stroke: #1596cb;
  stroke-width: 2;
  vector-effect: non-scaling-stroke;
  pointer-events: none;
}
.fresh-air-workbench .fa2d-opening-window-line { stroke: #607b88; }
.fresh-air-workbench .fa2d-opening-hit { stroke: transparent; pointer-events: stroke; cursor: pointer; }
.fresh-air-workbench .fa2d-opening.is-selected .fa2d-opening-window-line,
.fresh-air-workbench .fa2d-opening.is-selected .fa2d-opening-door-leaf {
  stroke: #ef8b2c;
  stroke-width: 3;
  filter: drop-shadow(0 0 3px rgba(239, 139, 44, .5));
}

.fa-wall-setting-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.fa-wall-setting-grid label {
  position: relative;
  display: grid;
  gap: 4px;
  min-width: 0;
}
.fa-wall-setting-grid label:first-child { grid-column: 1 / -1; }
.fa-wall-setting-grid label > span {
  color: var(--design-muted);
  font-size: 9px;
}
.fa-wall-setting-grid input,
.fa-wall-setting-grid select {
  width: 100%;
  min-height: 32px;
  padding: 0 26px 0 9px;
  border: 1px solid var(--design-line);
  border-radius: 3px;
  color: var(--design-ink);
  background: var(--design-surface);
  font: inherit;
}
.fa-wall-setting-grid label > small {
  position: absolute;
  right: 8px;
  bottom: 8px;
  color: var(--design-muted);
  font-size: 8px;
  pointer-events: none;
}
.fa-wall-settings > small {
  display: block;
  margin-top: 8px;
  color: var(--design-muted);
  font-size: 9px;
  line-height: 1.5;
}
.fa-secondary-button {
  width: 100%;
  min-height: 34px;
  margin-top: 9px;
  border: 1px solid var(--design-line-strong);
  border-radius: 3px;
  color: var(--design-ink);
  background: var(--design-subtle);
  font-size: 10px;
  cursor: pointer;
}
.fa-secondary-button:hover { border-color: var(--design-accent); color: var(--design-accent); background: var(--design-accent-soft); }

.fa-blank-guide {
  position: absolute;
  z-index: 5;
  top: 24px;
  left: 50%;
  display: none;
  align-items: center;
  gap: 14px;
  padding: 9px 10px 9px 12px;
  border: 1px solid var(--design-line);
  border-radius: 4px;
  color: var(--design-ink);
  background: color-mix(in srgb, var(--design-surface) 94%, transparent);
  box-shadow: 0 8px 24px rgba(31, 39, 44, .12);
  transform: translateX(-50%);
}
body[data-project-content="blank"] .fa-blank-guide { display: flex; }
body[data-fa-plan-interaction="room"] .fa-blank-guide { opacity: 0; pointer-events: none; }
.fa-blank-guide > span { display: grid; grid-template-columns: auto auto; gap: 1px 7px; }
.fa-blank-guide > span i { grid-row: 1 / span 2; align-self: center; color: var(--design-accent); font-size: 22px; font-style: normal; }
.fa-blank-guide strong { font-size: 11px; }
.fa-blank-guide small { color: var(--design-muted); font-size: 9px; }
.fa-blank-guide button {
  min-height: 32px;
  padding: 0 12px;
  border: 0;
  border-radius: 3px;
  color: #fff;
  background: var(--design-accent);
  font-size: 10px;
  cursor: pointer;
}

.fresh-air-workbench .fa-plan-status {
  z-index: 6;
  right: auto;
  bottom: 15px;
  left: 16px;
  max-width: calc(100% - 250px);
  padding: 7px 11px;
  border: 1px solid var(--design-line);
  border-radius: 3px;
  color: var(--design-muted);
  background: color-mix(in srgb, var(--design-surface) 92%, transparent);
  box-shadow: 0 3px 12px rgba(30, 38, 43, .08);
  font-size: 9px;
  backdrop-filter: none;
}
.fresh-air-workbench .fa-plan-north { top: 16px; right: 16px; }
.fresh-air-workbench .fa-plan-scale { right: 18px; bottom: 16px; }

/* 右侧预览与属性 */
.fresh-air-workbench .fa-side-panel {
  z-index: 75;
  top: var(--design-top);
  right: 0;
  bottom: 0;
  width: var(--design-side);
  grid-template-rows: 220px 38px minmax(0, 1fr);
  overflow: hidden;
  border: 0;
  border-left: 1px solid var(--design-line);
  border-radius: 0;
  color: var(--design-ink);
  background: var(--design-surface);
  box-shadow: none;
}
.fresh-air-workbench .fa-overview-card {
  margin: 0;
  border: 0;
  border-bottom: 1px solid var(--design-line);
  border-radius: 0;
  background: linear-gradient(145deg, var(--design-subtle), color-mix(in srgb, var(--design-canvas) 54%, var(--design-surface)));
  box-shadow: none;
}
.fresh-air-workbench .fa-overview-card header { top: 10px; left: 12px; right: 12px; }
.fresh-air-workbench .fa-overview-card header button {
  min-height: 28px;
  padding: 0 9px;
  border: 1px solid var(--design-line);
  border-radius: 3px;
  color: var(--design-accent);
  background: var(--design-surface);
  box-shadow: none;
  font-size: 9px;
}
.fresh-air-workbench .fa-side-tabs {
  height: 38px;
  margin: 0;
  padding: 0;
  gap: 0;
  border: 0;
  border-bottom: 1px solid var(--design-line);
  border-radius: 0;
  background: var(--design-surface);
}
.fresh-air-workbench .fa-side-tabs button {
  min-height: 37px;
  border: 0;
  border-radius: 0;
  color: var(--design-muted);
  background: transparent;
  font-size: 11px;
}
.fresh-air-workbench .fa-side-tabs button.is-active {
  color: var(--design-ink);
  background: var(--design-subtle);
  box-shadow: inset 0 -2px var(--design-accent);
}
.fresh-air-workbench .fa-side-scroll { margin: 0; overflow: auto; }
.fresh-air-workbench .fa-side-content { padding: 12px 10px 24px; }
.fresh-air-workbench .fa-side-content > header { margin: 0 -10px 10px; padding: 0 12px 10px; border-bottom: 1px solid var(--design-line); }
.fresh-air-workbench .fa-side-content > header span { font-size: 13px; }
.fresh-air-workbench .fa-side-content > header small { display: none; }

.fa-settings-block { padding: 8px 0 10px; border-bottom: 1px solid var(--design-line); }
.fa-settings-block h3 { margin: 0 0 8px; color: var(--design-ink); font-size: 11px; }
.fresh-air-workbench .fa-slider-field {
  min-height: 38px;
  grid-template-columns: 78px minmax(0, 1fr) 36px;
  gap: 6px;
  padding: 3px 0;
  border: 0;
  border-radius: 0;
  background: transparent;
}
.fresh-air-workbench .fa-slider-field > span { color: var(--design-ink); font-size: 10px; }
.fresh-air-workbench .fa-slider-field > b {
  min-height: 26px;
  display: grid;
  place-items: center;
  border: 1px solid var(--design-line);
  border-radius: 3px;
  color: var(--design-ink);
  background: var(--design-subtle);
  font-size: 10px;
}

.fa-switch-field,
.fa-select-field {
  min-height: 42px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  color: var(--design-ink);
}
.fa-switch-field > span { min-width: 0; display: grid; gap: 2px; }
.fa-switch-field strong,
.fa-select-field > span { font-size: 10px; }
.fa-switch-field small { color: var(--design-muted); font-size: 8px; }
.fa-switch-field input { position: absolute; opacity: 0; pointer-events: none; }
.fa-switch-field > i {
  position: relative;
  width: 34px;
  height: 19px;
  flex: 0 0 auto;
  border-radius: 999px;
  background: var(--design-line-strong);
  transition: background 140ms ease;
}
.fa-switch-field > i::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, .2);
  transition: transform 140ms ease;
}
.fa-switch-field input:checked + i { background: var(--design-accent); }
.fa-switch-field input:checked + i::after { transform: translateX(15px); }
.fa-switch-field.is-disabled { opacity: .48; }
.fa-select-field select,
.fa-building-type-row input,
.fa-building-type-row button {
  min-height: 30px;
  border: 1px solid var(--design-line);
  border-radius: 3px;
  color: var(--design-ink);
  background: var(--design-subtle);
  font-size: 9px;
}
.fa-select-field select { min-width: 118px; padding: 0 7px; }
.fa-building-type-row { display: grid; grid-template-columns: 1fr auto; gap: 6px; }
.fa-building-type-row input { min-width: 0; padding: 0 8px; }
.fa-building-type-row button { padding: 0 8px; opacity: .62; }
.fresh-air-workbench .fa-module-engineering-summary,
.fresh-air-workbench .fa-project-metrics { margin-top: 10px; }
body[data-project-content="blank"] .fresh-air-workbench .fa-module-engineering-summary { display: none; }
.fresh-air-workbench .fa-project-metrics { grid-template-columns: repeat(2, 1fr); }
.fresh-air-workbench .fa-project-metrics div {
  min-height: 50px;
  border: 1px solid var(--design-line);
  border-radius: 3px;
  background: var(--design-subtle);
}

/* 底部楼层与视图控制 */
.fresh-air-workbench .fa-bottom-dock {
  z-index: 90;
  right: auto;
  bottom: 12px;
  left: calc(var(--design-rail) + var(--design-library) + (100% - var(--design-rail) - var(--design-library) - var(--design-side)) / 2);
  height: 44px;
  display: flex;
  gap: 3px;
  padding: 4px;
  border: 1px solid var(--design-line);
  border-radius: 4px;
  background: color-mix(in srgb, var(--design-surface) 94%, transparent);
  box-shadow: 0 5px 20px rgba(28, 36, 42, .14);
  transform: translateX(-50%);
  backdrop-filter: blur(12px);
  transition: left 180ms ease;
}
.fresh-air-workbench.is-library-collapsed .fa-bottom-dock {
  left: calc(var(--design-rail) + (100% - var(--design-rail) - var(--design-side)) / 2);
}
.fresh-air-workbench .fa-bottom-dock > button[data-fa-command="home"],
.fresh-air-workbench .fa-bottom-dock > button:disabled:not(.fa-pipe-context),
.fresh-air-workbench .fa-bottom-dock .fa-dock-divider,
.fresh-air-workbench .fa-bottom-dock .fa-view-segment { display: flex; }
.fresh-air-workbench .fa-bottom-dock > button,
.fresh-air-workbench .fa-view-segment button {
  min-width: 44px;
  height: 36px;
  border: 0;
  border-radius: 3px;
  color: var(--design-muted);
  background: transparent;
  font-size: 9px;
}
.fresh-air-workbench .fa-bottom-dock > button[data-fa-command="home"] { min-width: 86px; }
.fresh-air-workbench .fa-bottom-dock > button:disabled { min-width: 54px; opacity: .7; }
.fresh-air-workbench .fa-bottom-dock > button:hover,
.fresh-air-workbench .fa-view-segment button:hover,
.fresh-air-workbench .fa-view-segment button.is-active { color: var(--design-accent); background: var(--design-accent-soft); }
.fresh-air-workbench .fa-dock-divider { width: 1px; height: 24px; align-self: center; background: var(--design-line); }
.fresh-air-workbench .fa-view-segment {
  display: flex;
  padding: 2px;
  border: 1px solid var(--design-line);
  border-radius: 3px;
  background: var(--design-subtle);
}

.fresh-air-workbench .fa-bottom-dock .fa-pipe-context { display: none !important; }
body[data-engineering-interaction="pipe"] .fresh-air-workbench .fa-bottom-dock .fa-pipe-context { display: flex !important; }
body[data-fa-plan-interaction="idle"] .fresh-air-workbench .fa-bottom-dock [data-fa-command="cancel"] { display: none; }

.fresh-air-workbench .fa-branch-tools {
  z-index: 96;
  bottom: 64px;
  left: calc(var(--design-rail) + var(--design-library) + 18px);
}
.fresh-air-workbench .fa-branch-root { display: none; }
.fresh-air-workbench .fa-branch-panel { bottom: 0; border-radius: 5px; }

/* 3D 与 2D 占用同一中央工作区。 */
body[data-workspace-mode="freshAir"][data-workspace-view="3d"] #three-bedroom-canvas {
  top: 58px;
  right: 240px;
  bottom: 0;
  left: 412px;
  width: calc(100% - 652px);
  height: calc(100% - 58px);
  border: 0;
  border-radius: 0;
  box-shadow: none;
}
body[data-workspace-mode="freshAir"][data-workspace-view="3d"][data-design-panel="collapsed"] #three-bedroom-canvas {
  left: 52px;
  width: calc(100% - 292px);
}

.fresh-air-workbench .fa-cfd-overlay-panel {
  position: absolute;
  z-index: 94;
  top: 76px;
  right: 256px;
  width: 286px;
  padding: 14px;
  border: 1px solid color-mix(in srgb, var(--design-accent) 24%, var(--design-line));
  border-radius: 10px;
  background: color-mix(in srgb, var(--design-surface) 96%, transparent);
  box-shadow: 0 18px 44px rgb(18 36 42 / 16%);
  color: var(--design-text);
  pointer-events: auto;
  backdrop-filter: blur(12px);
}

.fresh-air-workbench .fa-cfd-overlay-panel[hidden],
body[data-workspace-view="2d"] .fa-cfd-overlay-panel { display: none !important; }

.fa-cfd-overlay-panel > header,
.fa-cfd-overlay-panel > header > span,
.fa-cfd-overlay-panel footer,
.fa-cfd-field-switch,
.fa-cfd-legend > span,
.fa-cfd-legend > small,
.fa-cfd-overlay-panel dl > div { display: flex; align-items: center; }

.fa-cfd-overlay-panel > header { justify-content: space-between; gap: 12px; }
.fa-cfd-overlay-panel > header > span { min-width: 0; gap: 8px; }
.fa-cfd-overlay-panel > header i {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 9px;
  background: var(--design-accent);
  color: #fff;
  font-size: 11px;
  font-style: normal;
  font-weight: 800;
}
.fa-cfd-overlay-panel > header b { font-size: 14px; }
.fa-cfd-overlay-panel > header small { margin-left: auto; color: var(--design-muted); font-size: 9px; }
.fa-cfd-overlay-panel > header > button {
  width: 28px;
  height: 28px;
  border: 1px solid var(--design-line);
  border-radius: 7px;
  background: var(--design-subtle);
  color: var(--design-text);
}
.fa-cfd-overlay-panel > p {
  margin: 12px 0;
  color: var(--design-muted);
  font-size: 11px;
  line-height: 1.55;
}
.fa-cfd-field-switch { gap: 7px; }
.fa-cfd-field-switch button {
  display: grid;
  flex: 1;
  grid-template-columns: 25px 1fr;
  grid-template-rows: 1fr 1fr;
  min-height: 48px;
  padding: 6px;
  border: 1px solid var(--design-line);
  border-radius: 8px;
  background: var(--design-surface);
  color: var(--design-text);
  text-align: left;
}
.fa-cfd-field-switch button i {
  display: grid;
  grid-row: 1 / 3;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-size: 10px;
  font-style: normal;
}
.fa-cfd-field-switch button span { font-size: 11px; font-weight: 700; }
.fa-cfd-field-switch button small { color: var(--design-muted); font-size: 9px; }
.fa-cfd-field-switch button.is-active {
  border-color: var(--design-accent);
  background: color-mix(in srgb, var(--design-accent) 10%, var(--design-surface));
  color: var(--design-accent);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--design-accent) 34%, transparent);
}
.fa-cfd-legend { margin-top: 12px; }
.fa-cfd-legend > span { gap: 7px; }
.fa-cfd-legend > span i {
  width: 126px;
  height: 8px;
  border-radius: 99px;
  background: linear-gradient(90deg, #275ad7 0%, #34b8dd 28%, #67d394 50%, #f1d04c 72%, #ee5849 100%);
}
.fa-cfd-legend b { font-variant-numeric: tabular-nums; }
.fa-cfd-legend > span b { min-width: 42px; font-size: 10px; }
.fa-cfd-legend > span b:last-child { text-align: right; }
.fa-cfd-legend > small { justify-content: flex-end; margin-top: 5px; color: var(--design-muted); font-size: 9px; }
.fa-cfd-overlay-panel dl { margin: 12px 0 0; padding-top: 8px; border-top: 1px solid var(--design-line); }
.fa-cfd-overlay-panel dl > div { justify-content: space-between; min-height: 24px; font-size: 10px; }
.fa-cfd-overlay-panel dt { color: var(--design-muted); }
.fa-cfd-overlay-panel dd { margin: 0; font-weight: 650; }
.fa-cfd-overlay-panel footer { gap: 8px; margin-top: 10px; }
.fa-cfd-overlay-panel footer button {
  flex: 1;
  min-height: 32px;
  border: 1px solid var(--design-line);
  border-radius: 7px;
  background: var(--design-subtle);
  color: var(--design-text);
  font-size: 10px;
}
.fa-cfd-overlay-panel footer button:first-child { border-color: var(--design-accent); color: var(--design-accent); }
.fresh-air-workbench .fa-cfd-viewer-link.is-active { color: var(--design-accent); }

@media (max-width: 1120px) {
  .fresh-air-workbench .fa-cfd-overlay-panel { right: 246px; width: 250px; }
  .fa-cfd-overlay-panel > header small { display: none; }
}

@media (max-width: 1120px) {
  .fresh-air-workbench { --design-library: 300px; --design-side: 230px; }
  .fresh-air-workbench .fa-commandbar { grid-template-columns: 210px minmax(520px, 1fr) auto; }
  .fa-room-preset-grid,
  .fa-component-grid { grid-template-columns: repeat(2, 1fr); }
  .fresh-air-workbench .fa-command-actions .fa-local-badge { display: none; }
  body[data-workspace-mode="freshAir"][data-workspace-view="3d"] #three-bedroom-canvas {
    right: 230px;
    left: 352px;
    width: calc(100% - 582px);
  }
}

@media (max-width: 820px) {
  .fresh-air-workbench { --design-library: 260px; --design-side: 0px; }
  .fresh-air-workbench .fa-commandbar { grid-template-columns: 172px minmax(420px, 1fr) auto; }
  .fresh-air-workbench .fa-brand-block { padding-inline: 10px; }
  .fresh-air-workbench .fa-side-panel { display: none; }
  .fresh-air-workbench .fa-command-actions button span { display: none; }
  body[data-workspace-mode="freshAir"][data-workspace-view="3d"] #three-bedroom-canvas {
    right: 0;
    left: 312px;
    width: calc(100% - 312px);
  }
  body[data-workspace-mode="freshAir"][data-workspace-view="3d"][data-design-panel="collapsed"] #three-bedroom-canvas {
    left: 52px;
    width: calc(100% - 52px);
  }
}

@media (max-width: 620px) {
  .fresh-air-workbench { --design-library: calc(100vw - var(--design-rail)); }
  .fresh-air-workbench .fa-commandbar { grid-template-columns: 138px minmax(360px, 1fr) 52px; }
  .fresh-air-workbench .fa-brand-block img { width: 28px; height: 28px; }
  .fresh-air-workbench .fa-brand-block strong { font-size: 11px; }
  .fresh-air-workbench .fa-brand-block small { font-size: 9px; }
  .fresh-air-workbench:not(.is-library-collapsed) .fa-plan-stage { left: 100%; }
  .fresh-air-workbench .fa-bottom-dock {
    right: 8px;
    left: auto !important;
    max-width: calc(100vw - 70px);
    overflow-x: auto;
    transform: none;
  }
  .fresh-air-workbench .fa-plan-status,
  .fresh-air-workbench .fa-plan-north,
  .fresh-air-workbench .fa-plan-scale { display: none; }
}