/* 成桥·千年一瞬：可逆的数字化艺术推演，沿用现有纸、木、青绿配色。 */
#instant-screen{padding:7px 20px 44px;max-width:1240px;margin:0 auto;animation:instant-arrive .7s ease-out}.instant-heading{text-align:center;position:relative;margin:0 auto 25px;max-width:1040px}.instant-heading>.eyebrow{justify-content:center;font-size:10px;letter-spacing:3px}.instant-heading h1{font:400 44px/1.5 var(--serif);letter-spacing:5px;margin:10px 0 6px}.instant-heading h1>i{font-style:normal;color:#ae7859;font-size:26px;margin:0 8px}.instant-heading>p:last-child{font-size:11px;line-height:1.9;letter-spacing:1px;color:#8b927c}.instant-heading .back-button{left:0;top:0}#instant-title:focus{outline:none}.instant-composition{max-width:1040px;margin:auto;border:1px solid #d0d3be;background:#f2f0e5;position:relative;isolation:isolate}.instant-labelbar{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #dadcca;height:48px;padding:0 23px;font-size:10px;letter-spacing:2px;color:#839175}.instant-labelbar>span:first-child{display:flex;align-items:center;gap:10px}.instant-labelbar i{font:9px Georgia,serif;letter-spacing:2px;color:#a3a78f;margin-left:8px}.instant-labelbar .art-demo-label{font-size:9px;letter-spacing:1px;color:#ad8a6a}.instant-canvas{position:relative;aspect-ratio:1000/650;overflow:hidden;touch-action:none;user-select:none;-webkit-user-select:none;cursor:ns-resize;background:radial-gradient(ellipse at 50% 46%,#f9f6ecaa,transparent 70%)}.instant-canvas>svg{position:absolute;width:100%;height:auto;top:-3%;left:0;pointer-events:none;overflow:visible}.instant-canvas svg{display:block}.instant-canvas[data-dragging="true"]{cursor:grabbing}.instant-member{will-change:opacity,transform;transition:opacity .15s ease-out,transform .15s ease-out;transform-box:fill-box;transform-origin:center}.instant-canvas[data-dragging="true"] .instant-member{transition-duration:60ms}#instant-architecture{transform:translate(var(--instant-parallax-x,0px),var(--instant-parallax-y,0px));transition:transform .4s ease-out}#instant-landscape{transition:opacity .4s}.instant-mountains,.instant-river,.instant-clouds,.instant-ripples{transition:opacity .5s ease-out}.instant-clouds{transform-box:fill-box;transform-origin:center;animation:instant-cloud-drift 14s ease-in-out infinite alternate;animation-play-state:paused}.instant-ripples{transform-box:fill-box;transform-origin:center;animation:instant-water-breathe 7s ease-in-out infinite;animation-play-state:paused}.instant-canvas.is-complete .instant-clouds,.instant-canvas.is-completing .instant-clouds,.instant-canvas.is-complete .instant-ripples,.instant-canvas.is-completing .instant-ripples{animation-play-state:running}.instant-screen-inactive .instant-clouds,.instant-screen-inactive .instant-ripples{animation-play-state:paused!important}.instant-canvas .instant-veil{position:absolute;inset:0;z-index:3;pointer-events:none;opacity:0;background:radial-gradient(ellipse at 50% 40%,#f5deb4aa,transparent 66%);mix-blend-mode:screen}.instant-canvas.is-completing .instant-veil{animation:instant-light 1.4s ease-out both}.instant-sweep{position:absolute;top:12%;bottom:17%;width:16%;left:-20%;background:linear-gradient(90deg,transparent,#f5e9c83b,transparent);transform:skewX(-15deg);opacity:0;pointer-events:none;z-index:3}.instant-canvas.is-completing .instant-sweep{animation:instant-sweep 1.3s ease-in-out both}.instant-poem{position:absolute;left:8%;right:8%;top:79%;text-align:center;z-index:4;pointer-events:none;animation:instant-poem-reveal 1.5s ease-out both}.instant-poem>span{display:block;font:400 29px/1.8 var(--serif);letter-spacing:5px;color:#3b5749}.instant-poem>small{display:block;font:8px/2 Georgia,serif;letter-spacing:3px;color:#8c997e;margin-top:7px}.instant-gesture{position:absolute;left:50%;top:82%;transform:translateX(-50%);display:flex;gap:11px;align-items:center;pointer-events:none;transition:opacity .3s;color:#929c83;font-size:10px;letter-spacing:2px;white-space:nowrap}.instant-gesture>span{border:1px solid #c8d1b7;height:29px;width:23px;display:flex;align-items:center;justify-content:center;border-radius:14px;font-size:16px;color:#7d9271;animation:instant-gesture 2s ease-in-out infinite}.instant-canvas.is-completing .instant-gesture,.instant-canvas.is-complete .instant-gesture{opacity:0}.instant-scrubber{border-top:1px solid #d6d9c4;padding:22px 31px 20px;background:#f2f0e7}.instant-progress-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.instant-progress-top>span{font-family:var(--serif);font-size:19px;letter-spacing:3px;color:#667d5e}.instant-progress-top output{font:23px Georgia,serif;color:#96764a;font-variant-numeric:tabular-nums;letter-spacing:1px}.instant-progress-top output::after{content:"%";font-size:12px;margin-left:4px}.instant-range{width:100%;height:44px;margin:0;padding:0;background:transparent;cursor:ew-resize;accent-color:#8d6746;appearance:none;-webkit-appearance:none;display:block}.instant-range::-webkit-slider-runnable-track{height:3px;background:linear-gradient(90deg,#829978 0 var(--instant-progress,0%),#d6d9c5 var(--instant-progress,0%) 100%);border-radius:3px}.instant-range::-webkit-slider-thumb{appearance:none;-webkit-appearance:none;width:24px;height:24px;background:#f5edda;border:1px solid #9e8359;border-radius:50%;margin-top:-10px;box-shadow:0 0 0 5px #b9ad841c,inset 0 0 0 6px #f5edda,inset 0 0 0 12px #8e6844;transition:box-shadow .15s}.instant-range:active::-webkit-slider-thumb{box-shadow:0 0 0 9px #b9ad8428,inset 0 0 0 6px #f5edda,inset 0 0 0 12px #8e6844}.instant-range::-moz-range-track{height:3px;background:#d6d9c5}.instant-range::-moz-range-progress{height:3px;background:#829978}.instant-range::-moz-range-thumb{width:24px;height:24px;border:1px solid #9e8359;background:#efe6ce;border-radius:50%;box-shadow:inset 0 0 0 6px #f5edda,inset 0 0 0 12px #8e6844}.instant-stage-nav{display:flex;justify-content:space-between;margin-top:4px;gap:6px}.instant-stage-nav button{min-height:40px;display:flex;align-items:center;gap:8px;font-size:10px;letter-spacing:1px;padding:5px 3px;color:#9b9f88}.instant-stage-nav button>i{font:italic 10px Georgia,serif;color:#a9ad97}.instant-stage-nav button.is-current,.instant-stage-nav button.current{color:#496542}.instant-stage-nav button.is-done,.instant-stage-nav button.done{color:#708769}.instant-stage-nav button[aria-current="step"]{color:#8e6444}.instant-information{max-width:1040px;margin:23px auto 0;display:grid;grid-template-columns:1.05fr 1.35fr;gap:38px;padding:1px 20px 0}.instant-stage-copy{padding-top:8px}.instant-stage-copy>.eyebrow{font-size:9px;letter-spacing:2.5px;gap:12px}.instant-stage-copy #instant-stage-index{font:italic 13px Georgia,serif;letter-spacing:1px;color:#a98762}.instant-stage-copy h2{font:400 27px/1.6 var(--serif);letter-spacing:3px;margin:7px 0 8px}.instant-stage-copy>p:last-child{font-size:11px;line-height:2;letter-spacing:.6px;color:#8b937c}.instant-culture{border-left:1px solid #d6dac5;padding:5px 0 0 28px}.instant-culture>.eyebrow{font-size:9px;letter-spacing:3px;margin-bottom:10px}.instant-culture article{animation:instant-culture-in .4s ease-out}.instant-culture h3{font:400 20px/1.5 var(--serif);letter-spacing:2px;margin-bottom:6px;color:#627a59}.instant-culture article p{font-size:11px;line-height:2;letter-spacing:.5px;color:#8b947c;max-width:460px}.instant-culture a{display:inline-block;font-size:8px;letter-spacing:.5px;color:#a2a78e;border-bottom:1px solid #cdd3bb;margin-top:7px;padding-bottom:2px}.instant-disclosure{font-size:9px;line-height:2;letter-spacing:.5px;color:#a1a58e;text-align:center;max-width:940px;margin:23px auto 0;padding:0 20px}.instant-disclosure strong{font-weight:400;color:#a17d5b}.instant-lower-actions{max-width:1040px;display:flex;align-items:center;justify-content:center;gap:22px;margin:10px auto 0}.instant-lower-actions .text-button{font-size:10px;color:#8c967e;min-height:44px}.instant-completion{max-width:1040px;border-top:1px solid #ccd3ba;text-align:center;margin:28px auto 0;padding:28px 20px 15px;animation:instant-poem-reveal .8s ease-out}.instant-completion .eyebrow{justify-content:center;font-size:9px;letter-spacing:3px}.instant-completion h2{font:400 30px/1.6 var(--serif);letter-spacing:5px;margin:12px 0}.instant-completion>p:not(.eyebrow){font-size:11px;line-height:2;letter-spacing:1px;color:#8d967e}.instant-completion .primary-button{margin-top:18px;min-width:212px;min-height:51px;font-size:12px;letter-spacing:2px}.instant-completion .coming-note{font-size:9px;line-height:1.8;color:#a1a68c;letter-spacing:.5px;margin-top:10px}.instant-reserved-dialog{width:420px;padding:44px 38px;text-align:center}.instant-reserved-dialog .eyebrow{justify-content:center;font-size:9px;letter-spacing:3px}.instant-reserved-dialog h2{font:400 34px/1.7 var(--serif);letter-spacing:5px;margin:15px 0}.instant-reserved-dialog p:not(.eyebrow){font-size:12px;line-height:2.1;letter-spacing:.7px;color:#89947b}.instant-reserved-dialog .primary-button{margin-top:24px;min-height:46px;font-size:11px;letter-spacing:2px}.header-nav{gap:22px}.nav-instant{white-space:nowrap}.instant-active .nav-game,.instant-active .nav-weave{color:#767f70}.instant-active .nav-game::after,.instant-active .nav-weave::after{display:none}#weave-finale .weave-final-actions>[data-weave-replay]{background:transparent;border:1px solid #c4cdb3;color:#728769;min-height:46px}.instant-no-motion .instant-member{transition:none!important}
@keyframes instant-arrive{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes instant-cloud-drift{from{transform:translateX(-9px)}to{transform:translateX(13px)}}@keyframes instant-water-breathe{0%,100%{transform:scaleX(.97)}50%{transform:scaleX(1.03)}}@keyframes instant-light{0%{opacity:0}35%{opacity:.8}100%{opacity:0}}@keyframes instant-sweep{0%{opacity:0;left:-20%}20%{opacity:1}85%{opacity:.6}100%{opacity:0;left:115%}}@keyframes instant-poem-reveal{from{opacity:0;transform:translateY(10px);filter:blur(4px)}to{opacity:1;transform:translateY(0);filter:blur(0)}}@keyframes instant-gesture{0%,100%{transform:translateY(3px)}50%{transform:translateY(-4px)}}@keyframes instant-culture-in{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}
@media(max-width:1100px){.instant-heading h1{font-size:37px}.header-nav{gap:16px;font-size:11px}.instant-information{gap:25px}.instant-culture{padding-left:22px}.instant-labelbar{height:45px}}
@media(max-width:760px){#instant-screen{padding:0 12px 28px}.instant-heading{text-align:left;margin:0 8px 20px}.instant-heading .back-button{position:static;display:block;margin:0 0 9px;padding:7px 0;font-size:15px}.instant-heading>.eyebrow{justify-content:flex-start;font-size:8px;letter-spacing:2px}.instant-heading h1{font-size:29px;letter-spacing:2px;line-height:1.7;margin-top:8px}.instant-heading h1>i{font-size:19px;margin:0 4px}.instant-heading>p:last-child{font-size:10px;letter-spacing:.4px;line-height:1.9;max-width:320px}.instant-labelbar{height:41px;padding:0 12px;font-size:9px;letter-spacing:.5px}.instant-labelbar i{display:none}.instant-labelbar .art-demo-label{font-size:8px;letter-spacing:.2px}.instant-canvas{aspect-ratio:1000/820}.instant-canvas>svg{top:3%;width:122%;max-width:none;left:-11%}.instant-poem{top:76%;left:3%;right:3%}.instant-poem>span{font-size:16px;line-height:1.9;letter-spacing:2px}.instant-poem>small{font-size:6px;letter-spacing:1.5px;margin-top:5px}.instant-gesture{top:83%;font-size:9px;letter-spacing:1px;gap:8px}.instant-gesture>span{width:20px;height:27px;font-size:14px}.instant-scrubber{padding:16px 14px 10px}.instant-progress-top{margin-bottom:1px}.instant-progress-top>span{font-size:16px;letter-spacing:2px}.instant-progress-top output{font-size:21px}.instant-progress-top output::after{font-size:10px}.instant-stage-nav{gap:0;margin-top:0}.instant-stage-nav button{font-size:9px;letter-spacing:.2px;gap:4px;padding:5px 0;min-height:36px}.instant-stage-nav button>i{font-size:8px}.instant-information{display:flex;flex-direction:column;gap:17px;margin-top:20px;padding:0 7px}.instant-stage-copy{padding-top:0}.instant-stage-copy>.eyebrow{font-size:8px;letter-spacing:2px}.instant-stage-copy #instant-stage-index{font-size:12px}.instant-stage-copy h2{font-size:23px;letter-spacing:2px;margin:7px 0 5px}.instant-stage-copy>p:last-child{font-size:10px;line-height:2;letter-spacing:.4px}.instant-culture{padding:14px 0 0;border-left:0;border-top:1px solid #d7dbc6}.instant-culture>.eyebrow{font-size:8px;letter-spacing:2px;margin-bottom:9px}.instant-culture h3{font-size:19px;margin-bottom:5px;letter-spacing:2px}.instant-culture article p{font-size:10px;line-height:2.1}.instant-culture a{font-size:8px;line-height:1.7}.instant-disclosure{font-size:8px;padding:0 6px;letter-spacing:.2px;line-height:1.9;margin-top:19px}.instant-lower-actions{margin-top:7px;gap:21px}.instant-lower-actions .text-button{font-size:9px}.instant-completion{padding:24px 7px 9px;margin-top:23px}.instant-completion h2{font-size:25px;letter-spacing:3px;margin:10px 0}.instant-completion>p:not(.eyebrow){font-size:10px;letter-spacing:.5px}.instant-completion .primary-button{font-size:11px;min-height:48px;margin-top:17px}.instant-completion .coming-note{font-size:8px}.instant-reserved-dialog{padding:34px 24px}.instant-reserved-dialog h2{font-size:28px}.instant-reserved-dialog p:not(.eyebrow){font-size:11px}.instant-reserved-dialog .primary-button{margin-top:21px}}
@media(max-width:360px){.instant-heading h1{font-size:26px}.instant-poem>span{font-size:14px;letter-spacing:1px}.instant-stage-nav button>i{display:none}}
@media(prefers-reduced-motion:reduce){#instant-screen,.instant-member,.instant-clouds,.instant-ripples,.instant-poem,.instant-completion,.instant-gesture span,.instant-culture article{animation:none!important;transition:none!important;filter:none!important}#instant-architecture{transform:none!important}.instant-sweep,.instant-veil{display:none}}
.instant-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}
.instant-member{opacity:0}.instant-mountains{opacity:.06}.instant-river{opacity:.03}.instant-clouds,.instant-ripples{opacity:0}
.instant-stage-copy #instant-stage-index{width:auto;height:auto;background:none;flex-shrink:0;white-space:nowrap}