.origin-model {
  --origin-ink: var(--text);
  --origin-secondary: var(--muted);
  --origin-muted: var(--muted);
  position: relative;
  padding-block: 96px 64px;
}
.origin-anchor { position: absolute; top: 0; scroll-margin-top: 42px; }
.origin-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 48px;
  align-items: start;
  margin-bottom: 48px;
}
.origin-intro h2 {
  color: var(--origin-ink);
  font-size: 48px;
  line-height: 56px;
  font-weight: 500;
  letter-spacing: -.02em;
}
.origin-copy { max-width: 52ch; }
.origin-description { color: var(--origin-secondary); font-size: 16px; line-height: 26px; text-wrap: pretty; }
.origin-cta { margin-top: 16px; min-height: 44px; color: var(--origin-ink); }
.origin-cta svg { width: 17px; height: 17px; }
.origin-scene {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 400px;
  overflow: hidden;
  isolation: isolate;
  border-radius: 12px;
  background: #dceef9;
  padding: 64px 48px;
  color: #525252;
  color-scheme: light;
}
.origin-backdrop { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -1; }
.origin-composer {
  width: min(100%, 664px);
  padding: 28px;
  border: 1px solid rgb(255 255 255 / .65);
  border-radius: 24px;
  background: rgb(255 255 255 / .92);
}
.origin-placeholder { font-size: 32px; line-height: 40px; font-weight: 400; letter-spacing: -.025em; color: #737373; }
.origin-composer-bottom { display: flex; justify-content: space-between; align-items: center; gap: 20px; margin-top: 48px; }
.origin-tool-row { display: flex; align-items: center; gap: 12px; }
.origin-tool {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  flex: 0 0 40px;
  border: 1px solid #e5e5e5;
  border-radius: 50%;
  background: #fff;
  overflow: hidden;
}
.origin-tool img { width: 22px; height: 24px; object-fit: contain; }
.origin-tool-autodesk img { width: 48px; height: auto; max-width: none; flex-shrink: 0; }
.origin-tool svg { width: 20px; height: 20px; }
.origin-plus svg { fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; }
.origin-more svg { fill: currentColor; }
.origin-send { width: 40px; height: 40px; display: grid; place-items: center; flex: 0 0 40px; background: #ededed; color: #666; border-radius: 50%; }
.origin-send svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.origin-caption { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding-top: 12px; color: var(--origin-muted); font-size: 12px; line-height: 18px; }
.origin-caption .text-link { min-height: 44px; font-size: 14px; gap: 8px; color: var(--origin-secondary); }
.origin-caption svg { width: 16px; height: 16px; }
.origin-feature-tabs {
  display: flex;
  align-items: stretch;
  gap: 4px;
  width: fit-content;
  margin-bottom: 24px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--surface);
}
.origin-model [hidden] { display: none; }
.origin-feature-tab {
  min-height: 44px;
  padding: 11px 16px;
  border: 1px solid transparent;
  border-radius: 3px;
  color: var(--muted);
  font-size: 14px;
  line-height: 20px;
  font-weight: 400;
  text-align: center;
  transition: background-color 140ms, color 140ms, border-color 140ms;
}
.origin-feature-tab:hover { color: var(--text); background: var(--selected); }
.origin-feature-tab[aria-selected=true] {
  border-color: var(--line);
  background: var(--canvas);
  color: var(--text);
  font-weight: 500;
}
.origin-feature-description {
  max-width: 68ch;
  margin-bottom: 24px;
  color: var(--muted);
  font-size: 16px;
  line-height: 26px;
  text-wrap: pretty;
}
.origin-fallback-heading {
  margin-block: 32px 8px;
  color: var(--origin-ink);
  font-size: 24px;
  line-height: 32px;
  font-weight: 500;
}
.origin-mesh-stage { aspect-ratio: 2 / 1; overflow: hidden; border-radius: 12px; background: var(--stage-blue); }
.origin-mesh-stage img { display: block; width: 100%; height: 100%; object-fit: contain; }
.origin-reference {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--muted);
  font-size: 12px;
  line-height: 18px;
  text-decoration: underline;
}
html[lang=zh-CN] .origin-intro h2 { letter-spacing: normal; line-height: 1.3; }
:root[data-theme=dark] .origin-model { --origin-ink: var(--text); --origin-secondary: var(--muted); --origin-muted: var(--muted); }
@media (max-width: 1199px) {
  .origin-intro { gap: 32px; }
  .origin-scene { min-height: 360px; padding: 56px 40px; }
}
@media (max-width: 760px) {
  .origin-model { padding-block: 56px 72px; }
  .origin-intro { grid-template-columns: minmax(0, 1fr); gap: 24px; margin-bottom: 32px; }
  .origin-copy { max-width: 52ch; }
  .origin-intro h2 { font-size: 36px; line-height: 44px; }
  .origin-scene { min-height: 280px; padding: 40px 16px; }
  .origin-composer { padding: 20px 16px 16px; border-radius: 24px; }
  .origin-placeholder { font-size: 24px; line-height: 32px; letter-spacing: -.025em; }
  .origin-composer-bottom { margin-top: 36px; gap: 8px; }
  .origin-tool-row { gap: 6px; }
  .origin-tool { width: 32px; height: 32px; flex-basis: 32px; }
  .origin-tool img { width: 19px; height: 20px; }
  .origin-tool-autodesk img { width: 40px; height: auto; }
  .origin-tool svg { width: 18px; height: 18px; }
  .origin-send { width: 32px; height: 32px; flex-basis: 32px; }
  .origin-send svg { width: 18px; height: 18px; }
  .origin-caption { align-items: flex-start; flex-direction: column; gap: 4px; }
}
@media (max-width: 380px) {
  .origin-scene { padding-inline: 12px; }
  .origin-composer { padding-inline: 12px; }
  .origin-tool-row { gap: 4px; }
  .origin-tool { width: 28px; height: 28px; flex-basis: 28px; }
  .origin-send { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .origin-feature-tab { transition: none; }
}