.qm-crossing {
  --cross-paper: #e2d4b6;
  --cross-ink: #34443c;
  --cross-red: #984738;
  position: fixed; inset: 0; width: 100vw; max-width: none; height: 100dvh; max-height: none;
  margin: 0; padding: 0; border: 0; color: var(--cross-ink); background: var(--cross-paper);
  font-family: 'Songti SC', 'STSong', 'SimSun', serif; overflow: hidden; isolation: isolate;
  overscroll-behavior: none; touch-action: none; -webkit-tap-highlight-color: transparent;
}
.qm-crossing::backdrop { background: transparent; }
.qm-crossing *, .qm-crossing *::before, .qm-crossing *::after { box-sizing: border-box; }
.qm-crossing [hidden] { display: none !important; }
.qm-crossing button {
  appearance: none; width: auto; height: auto; min-height: 44px; padding: 8px 13px;
  border: 0; border-radius: 0; border-bottom: 1px solid #77674f66; background: transparent;
  box-shadow: none; color: #5d503e; font: 12px 'Songti SC', 'STSong', 'SimSun', serif;
  letter-spacing: .15em; cursor: pointer; user-select: none;
}
.qm-crossing button:focus-visible, .qm-crossing input:focus-visible { outline: 2px solid var(--cross-red); outline-offset: 3px; }
.qm-crossing button:hover { color: var(--cross-red); }
.qm-crossing button:disabled { opacity: .5; cursor: wait; }
.qm-crossing__paper { position: absolute; inset: 0; pointer-events: none; }
.qm-crossing__paper::before {
  content: ''; position: absolute; inset: 0; opacity: .3;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='paper'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' opacity='.16' filter='url(%23paper)'/%3E%3C/svg%3E");
}
.qm-crossing__loading-art { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.qm-crossing__loading-art img { position: absolute; width: 100%; height: 50%; top: 20%; object-fit: cover; opacity: .3; mix-blend-mode: multiply; mask-image: linear-gradient(transparent, #000 20%, #000 70%, transparent); }
.qm-crossing--ready .qm-crossing__loading-art { visibility: hidden; }
.qm-crossing__webgl { position: absolute; inset: 0; display: block; width: 100%; height: 100%; touch-action: none; cursor: grab; opacity: 0; }
.qm-crossing--ready .qm-crossing__webgl { opacity: 1; }
.qm-crossing__webgl:active { cursor: grabbing; }
.qm-crossing__traces { position: absolute; inset: 0; pointer-events: none; z-index: 1; }
.qm-crossing__header { position: absolute; top: max(20px, env(safe-area-inset-top)); left: 25px; right: 25px; display: flex; justify-content: space-between; align-items: start; gap: 10px; z-index: 5; }
.qm-crossing__header button { border: 0; padding: 8px 12px; background: #e9e5d94d; color: #35453c; backdrop-filter: blur(8px); white-space: nowrap; }
.qm-crossing__sound { min-width: 84px !important; }
.qm-crossing__sound[aria-pressed='false'] { opacity: .75; }
.qm-crossing__heading { position: absolute; top: 90px; left: 36px; z-index: 2; pointer-events: none; text-shadow: 0 1px 20px #e7e7d8; }
.qm-crossing__heading h2 { font: 400 clamp(30px, 3.2vw, 46px) 'Kaiti SC', 'STKaiti', 'KaiTi', serif; letter-spacing: .22em; color: #34443c; margin: 13px 0; }
.qm-crossing__footer { position: absolute; bottom: max(25px, env(safe-area-inset-bottom)); left: 50%; transform: translateX(-50%); width: min(520px, calc(100% - 36px)); z-index: 3; text-align: center; pointer-events: none; }
.qm-crossing__copy { margin: 0 0 12px; min-height: 20px; font-size: 11px; line-height: 1.8; letter-spacing: .15em; color: #35453c; text-shadow: 0 1px 12px #eef0dc; }
.qm-crossing__controls { display: flex; justify-content: center; align-items: center; gap: 10px; }
.qm-crossing .qm-crossing__play { display: inline-block; min-width: 112px; min-height: 44px; padding: 10px 21px; border: 1px solid #6d786c70; border-radius: 2px; background: #e9e5d9d9; color: #36463e; font-size: 14px; pointer-events: auto; backdrop-filter: blur(8px); }
.qm-crossing .qm-crossing__scatter { pointer-events: auto; padding: 12px 18px; border: 1px solid #698b7b80; background: #ede3cbd9; color: #34594d; }
.qm-crossing__timeline { display: flex; align-items: center; gap: 15px; margin-top: 17px; padding: 9px 16px; border: 1px solid #c2c7b66b; border-radius: 2px; background: #e9e5d9b8; backdrop-filter: blur(8px); }
.qm-crossing__timeline span { white-space: nowrap; font-size: 10px; letter-spacing: .12em; color: #4e5c50; }
.qm-crossing input[type='range'] { appearance: auto; display: block; flex: 1; min-width: 30px; width: auto; height: 26px; margin: 0; padding: 0; accent-color: #8d4938; pointer-events: auto; cursor: ew-resize; background: transparent; touch-action: auto; opacity: 1; }
.qm-crossing__progress { position: absolute; bottom: 0; left: 0; width: 100%; height: 2px; z-index: 4; transform: scaleX(0); transform-origin: left; background: #8d4938; opacity: .45; }
.qm-crossing__welcome { position: absolute; z-index: 3; top: 42%; right: 6vw; width: 300px; max-width: calc(100% - 40px); max-height: calc(100% - 180px); overflow-y: auto; scrollbar-width: thin; padding: 24px 26px; background: #eee1c4ed; border: 1px solid #93856865; box-shadow: 0 10px 40px #53492c12; color: #34473e; touch-action: pan-y; }
.qm-crossing__welcome-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding-bottom: 13px; border-bottom: 1px solid #93856855; }
.qm-crossing__welcome-top > span { font: 22px 'Kaiti SC', 'STKaiti', 'KaiTi', serif; letter-spacing: .16em; white-space: nowrap; }
.qm-crossing__welcome-top > small { font-size: 10px; letter-spacing: .15em; color: #77674f; white-space: nowrap; }
.qm-crossing__greeting { font: 18px/1.9 'Kaiti SC', 'STKaiti', 'KaiTi', serif; min-height: 100px; margin: 20px 0; }
.qm-crossing__welcome-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.qm-crossing .qm-crossing__welcome button { letter-spacing: .06em; }
.qm-crossing .qm-crossing__follow { background: #984738; color: #f4e5c8; border: 1px solid #984738; padding: 10px 16px; font-size: 14px; }
.qm-crossing .qm-crossing__follow:hover { background: #803b30; }
.qm-crossing__questions { display: grid; gap: 4px; margin-top: 16px; border-top: 1px solid #93856855; padding-top: 10px; }
.qm-crossing .qm-crossing__questions button { text-align: left; border: 0; padding-left: 0; }
.qm-crossing--arrived .qm-crossing__footer { visibility: hidden; }
.qm-crossing--guiding .qm-crossing__welcome-actions, .qm-crossing--guiding .qm-crossing__questions { display: none; }
@media (max-width: 800px) {
  .qm-crossing__welcome { top: auto; bottom: max(22px, env(safe-area-inset-bottom)); left: 20px; right: 20px; width: auto; padding: 16px 20px; }
  .qm-crossing__welcome-top { padding-bottom: 9px; }
  .qm-crossing__welcome-top > span { font-size: 20px; }
  .qm-crossing__greeting { font-size: 17px; min-height: 0; margin: 12px 0; }
  .qm-crossing--arrived .qm-crossing__heading { top: 72px; }
}
@media (max-width: 600px) {
  .qm-crossing__header { left: 12px; right: 12px; }
  .qm-crossing__header button { padding: 8px 9px; font-size: 11px; letter-spacing: .08em; }
  .qm-crossing__sound { min-width: 76px !important; }
  .qm-crossing__heading { top: 90px; left: 22px; }
  .qm-crossing__heading h2 { font-size: 29px; }
  .qm-crossing__footer { bottom: max(18px, env(safe-area-inset-bottom)); }
  .qm-crossing__timeline { gap: 8px; padding: 6px 9px; }
  .qm-crossing__timeline span { font-size: 9px; }
  .qm-crossing__copy { font-size: 11px; letter-spacing: .08em; }
}
@media (prefers-reduced-motion: reduce) {
  .qm-crossing *, .qm-crossing *::before, .qm-crossing *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}