:root { color-scheme: light; --page: #faf9f7; --ink: #20201f; --muted: #72716e; --line: #e6e3df; --gold: #c6a66e; font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif; color: var(--ink); background: var(--page); }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { margin: 0; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; cursor: pointer; }
button:disabled { cursor: wait; opacity: .55; }
button, a, summary { touch-action: manipulation; }
a { color: inherit; text-decoration: none; }
button:focus-visible, a:focus-visible, summary:focus-visible { outline: 3px solid #967746; outline-offset: 5px; }
[hidden] { display: none !important; }
.site-header { min-height: 68px; max-width: 1040px; margin: auto; padding: 12px 32px; display: flex; align-items: center; justify-content: space-between; gap: 16px; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; gap: 7px; align-items: center; white-space: nowrap; font-size: 22px; letter-spacing: -.6px; }
.brand strong { font-weight: 650; }
.brand > span { font-weight: 400; font-size: .8em; }
.all-products { display: inline-flex; align-items: center; min-height: 44px; white-space: nowrap; font-size: 16px; }
main { max-width: 1040px; margin: auto; padding: 26px 32px 0; }
h1 { font-size: 34px; font-weight: 550; line-height: 1.3; letter-spacing: -.4px; margin: 0 0 18px; }
h1 span { display: block; font-size: 33px; font-weight: 550; margin-bottom: 1px; }
.viewer-card { position: relative; overflow: hidden; border-radius: 25px; background: radial-gradient(circle at 67% 19%, #f6f5f2 0%, #d4d0ca 48%, #918b84 100%); color: #302c27; }
.viewer-stage { height: clamp(330px, 46vw, 485px); position: relative; isolation: isolate; }
.webgl-viewport, .static-fallback { position: absolute; inset: 0; display: block; width: 100%; height: 100%; }
.webgl-viewport { z-index: 1; opacity: 0; transition: opacity .25s; }
.webgl-viewport canvas { display: block; width: 100%; height: 100%; touch-action: none; }
.static-fallback { transition: opacity .25s; }
.static-fallback img { width: 100%; height: 100%; object-fit: cover; object-position: center; display: block; }
.viewer-card[data-viewer-state="ready"] .static-fallback { opacity: 0; visibility: hidden; }
.viewer-card[data-viewer-state="ready"] .webgl-viewport { opacity: 1; }
.viewer-card[data-viewer-state="fallback"] .webgl-viewport { display: none; }
.viewer-card[data-viewer-state="fallback"] .gesture-hint,
.viewer-card[data-viewer-state="fallback"] .viewer-controls,
.viewer-card[data-viewer-state="fallback"] .reset-view { display: none; }
.reset-view { position: absolute; z-index: 3; right: 20px; top: 15px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; border: 0; padding: 3px 6px; background: transparent; color: #3d3832; font-size: 16px; }
.reset-view img { opacity: .8; }
.load-state { position: absolute; z-index: 4; bottom: 20px; left: 50%; transform: translateX(-50%); width: max-content; max-width: calc(100% - 32px); display: grid; gap: 9px; border-radius: 12px; background: #151410de; padding: 13px 16px; color: white; text-align: center; font-size: 13px; }
.load-state.is-hidden, .load-state[aria-hidden="true"] { display: none; }
.load-progress { display: block; height: 2px; width: 100%; background: linear-gradient(to right, #c3a36c var(--load-progress, 0%), #ffffff22 var(--load-progress, 0%)); }
.gesture-hint { margin: 0; text-align: center; font-size: 14px; line-height: 22px; color: #38342f; padding: 2px 14px 14px; }
.viewer-controls { display: grid; justify-items: center; gap: 14px; padding: 0 20px 20px; }
.state-options { width: min(370px, 75%); display: flex; border: 1px solid #a79f92; border-radius: 999px; background: #e5e2dc88; overflow: hidden; }
.state-options button { flex: 1; min-height: 44px; border: 0; color: #4b453d; background: transparent; border-radius: 999px; font-size: 17px; }
.state-options button[aria-pressed="true"] { background: #f8f7f3; color: #302c27; box-shadow: 0 1px 3px #50453112; }
.state-options button:focus-visible { outline-offset: -4px; }
.color-options { display: flex; align-items: center; gap: 35px; }
.color-options button { min-height: 44px; display: flex; align-items: center; gap: 9px; color: #302c27; background: transparent; border: 0; padding: 3px 7px; font-size: 16px; }
.color-swatch { width: 21px; height: 21px; border: 1px solid #8e8576; display: block; border-radius: 50%; }
.color-swatch.gold { background: #c8bea0; }
.color-swatch.black { background: #626c74; }
.color-options button[aria-pressed="true"] .color-swatch { outline: 2px solid #675942; outline-offset: 3px; }
.section-nav { display: flex; align-items: stretch; justify-content: space-around; position: sticky; top: 0; z-index: 5; background: #faf9f7f5; backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); margin-bottom: 27px; }
.section-nav a { position: relative; display: flex; align-items: center; justify-content: center; min-height: 68px; padding: 13px 12px; font-size: 17px; color: var(--muted); }
.section-nav a[aria-current="location"] { color: #171716; font-weight: 550; }
.section-nav a[aria-current="location"]::after { content: ""; width: 29px; height: 3px; background: var(--gold); border-radius: 3px; position: absolute; bottom: -1px; left: calc(50% - 14.5px); }
.support-section { scroll-margin-top: 15px; margin: 0 0 35px; }
h2 { font-size: 25px; font-weight: 550; margin: 0 0 7px; line-height: 1.45; }
.section-intro, .section-note { font-size: 15px; color: #62615e; line-height: 1.65; margin: 0 0 15px; }
.video-frame { position: relative; border-radius: 10px; overflow: hidden; aspect-ratio: 16 / 9; background: #f0eeea; border: 1px solid #e5e1da; }
.video-pending { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; color: #8b8680; gap: 7px; }
.video-pending > span { font-size: 16px; color: #6e6962; }
.video-pending p { font-size: 13px; margin: 0; }
.video-frame video { width: 100%; height: 100%; background: #151412; object-fit: contain; display: block; }
.faq-list { border: 1px solid var(--line); border-radius: 9px; overflow: hidden; margin-top: 13px; }
details + details { border-top: 1px solid var(--line); }
summary { list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 15px; min-height: 58px; padding: 14px 18px; cursor: pointer; font-size: 17px; }
summary::-webkit-details-marker { display: none; }
summary img { flex-shrink: 0; transition: transform .2s; opacity: .8; }
details[open] summary img { transform: rotate(45deg); }
details > p { font-size: 15px; line-height: 1.8; color: var(--muted); margin: 0; padding: 0 18px 18px; }
.section-note { margin-top: 10px; margin-bottom: 0; }
.site-footer { border-top: 1px solid var(--line); text-align: center; padding: 15px 20px calc(25px + env(safe-area-inset-bottom)); color: #85837e; font-size: 13px; line-height: 1.65; }
.site-footer a { color: #282725; font-size: 18px; min-height: 44px; display: inline-flex; align-items: center; }
.site-footer p { margin: 4px 0; }
.site-footer p a { color: inherit; font-size: 13px; min-height: 28px; text-decoration: underline; text-underline-offset: 3px; }
.site-footer .company { color: #484744; font-size: 16px; }
.site-footer .preview-note { font-size: 12px; color: #928f89; margin-top: 12px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.noscript-note { padding: 15px; text-align: center; }
@media (max-width: 600px) {
  .site-header { min-height: 62px; padding: 9px 17px; gap: 10px; }
  .brand { font-size: 19px; gap: 5px; }
  .all-products { font-size: 14px; }
  main { padding: 21px 16px 0; }
  h1 { font-size: 28px; margin-bottom: 16px; }
  h1 span { font-size: 28px; }
  .viewer-card { border-radius: 18px; }
  .viewer-stage { height: clamp(250px, 73vw, 395px); }
  .reset-view { right: 10px; top: 8px; font-size: 13px; gap: 6px; }
  .reset-view img { width: 20px; height: 20px; }
  .gesture-hint { font-size: 12px; padding-bottom: 11px; }
  .viewer-controls { gap: 11px; padding: 0 12px 12px; }
  .state-options { width: 76%; }
  .state-options button { font-size: 16px; }
  .color-options { gap: 27px; }
  .color-options button { font-size: 14px; }
  .section-nav { margin-bottom: 23px; }
  .section-nav a { min-height: 62px; font-size: 15px; padding: 12px 5px; }
  h2 { font-size: 23px; }
  .section-intro, .section-note { font-size: 14px; }
  .support-section { margin-bottom: 29px; }
  summary { font-size: 16px; min-height: 55px; padding: 13px 13px; }
  details > p { padding-inline: 13px; font-size: 14px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition-duration: 0s !important; } }