@charset "UTF-8";
body{-webkit-user-select:none;user-select:none}
input,textarea,[contenteditable="true"]{-webkit-user-select:text;user-select:text}
img{-webkit-user-drag:none}
:root{color-scheme:dark;--ink:#f2f3ff;--dim:#9aa7c6;--cyan:#a2e3ff;--purple:#ac9eff;--line:rgba(174,198,255,.2);--panel:rgba(13,20,43,.85);font-family:"Segoe UI","Microsoft YaHei","PingFang SC",sans-serif;font-weight:400}
*{box-sizing:border-box}body{margin:0;background:#060a1b;color:var(--ink);overflow:hidden}button,input,textarea,select{font:inherit}button,a,label{-webkit-tap-highlight-color:transparent}button{cursor:pointer;color:inherit}button:disabled{cursor:wait;opacity:.55}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--cyan);outline-offset:5px}button{border:0}a{color:inherit;text-decoration:none}[hidden]{display:none!important}#stage{position:fixed;inset:0;background:radial-gradient(ellipse at 52% 45%,#16214c 0,#0a122e 36%,#050816 77%);touch-action:none}#stage canvas{width:100%;height:100%;display:block}.vignette{position:fixed;inset:0;pointer-events:none;background:radial-gradient(ellipse at center,transparent 36%,rgba(0,2,12,.4));z-index:1}.topbar{position:fixed;top:0;left:0;width:100%;padding:30px 40px;display:flex;justify-content:space-between;align-items:center;z-index:8}.wordmark{display:flex;align-items:center;gap:12px;font-size:17px;letter-spacing:3px}.star{font-size:28px;color:var(--cyan)}.wordmark small{display:block;color:#6e7eaa;font-size:8px;letter-spacing:2px;margin-top:5px}.tools{display:flex;gap:9px}.icon-button{position:relative;width:42px;height:42px;border:1px solid var(--line);background:rgba(20,29,58,.45);border-radius:50%;font-size:20px;display:grid;place-items:center;backdrop-filter:blur(12px)}.icon-button:hover,.quiet-button:hover,.nav-button:hover{background:rgba(126,151,236,.15);border-color:rgba(182,215,255,.5)}.sound-line{position:absolute;width:20px;height:1px;background:#8ea0c3;transform:rotate(-45deg)}.playing .sound-line{display:none}.playing{color:var(--cyan);box-shadow:0 0 20px #8fd4ff15}.screen{position:fixed;inset:0;z-index:3}.welcome{display:flex;flex-direction:column;justify-content:center;align-items:flex-start;padding:100px max(7vw,40px);background:linear-gradient(90deg,rgba(6,10,27,.72),transparent 70%)}.eyebrow{font-size:10px;letter-spacing:3px;color:var(--cyan);font-weight:500}.welcome .eyebrow{display:flex;align-items:center;gap:14px;margin-bottom:35px}.eyebrow span:not(.star){width:22px;height:1px;background:#90c6eb5c}.welcome-to{color:#b4bfd8;letter-spacing:3px;font-size:15px;margin:0 0 14px}.welcome h1{font-size:clamp(38px,4.5vw,70px);line-height:1.45;letter-spacing:3px;font-weight:400;font-family:"Noto Serif SC","Songti SC","SimSun",serif;margin:0}.welcome h1 span{background:linear-gradient(105deg,#eef2ff,#a9b4ff 60%,#b8eaff);background-clip:text;-webkit-background-clip:text;color:transparent}.subtitle{color:#9eabc8;font-size:14px;letter-spacing:1.5px;line-height:1.9;margin:24px 0 36px}.primary{padding:16px 25px;border:1px solid #b3c9ff66;border-radius:999px;background:linear-gradient(115deg,#b3dfff20,#a69dff24);color:#ebf7ff;min-width:190px;display:inline-flex;gap:28px;justify-content:space-between;align-items:center;box-shadow:inset 0 0 18px #a1cdff08,0 0 40px #8eb4fa08;letter-spacing:1px;transition:background .2s,transform .2s}.primary:hover{background:linear-gradient(115deg,#b3dfff38,#a69dff40);transform:translateY(-2px)}.text-button{background:none;border:0;color:#9bacca;padding:10px 3px;font-size:12px}.text-button:hover{color:#e0f4ff}.welcome #direct{margin:6px 16px}.welcome-note{color:#627491;font-size:11px;margin:26px 0 0;letter-spacing:1px}.inline-error{max-width:350px;color:#f5c4b4;font-size:13px;line-height:1.8}.intro{text-align:center;pointer-events:none}.intro .eyebrow{position:absolute;bottom:26%;width:100%;left:0}.quiet-button{border:1px solid var(--line);background:rgba(12,22,46,.7);padding:12px 20px;border-radius:999px;font-size:12px;letter-spacing:1px}.intro .quiet-button{position:absolute;bottom:max(35px,env(safe-area-inset-bottom));right:40px;pointer-events:auto}.experience{position:fixed;inset:0;z-index:3;pointer-events:none}.scene-heading{position:absolute;left:10px;right:10px;top:15%;text-align:center}.scene-heading h2{font-size:clamp(28px,3vw,44px);font-family:"Noto Serif SC","Songti SC","SimSun",serif;font-weight:400;letter-spacing:10px;text-indent:10px;margin:12px 0;color:#e3e6ff;text-shadow:0 0 28px #9bafff70}.scene-heading>p:last-child{font-size:12px;color:#91a1c3;letter-spacing:2px}.scene-footer{position:absolute;bottom:max(20px,env(safe-area-inset-bottom));left:0;right:0;display:flex;flex-direction:column;align-items:center;pointer-events:none}.gesture-hint{font-size:10px;letter-spacing:2px;color:#8395b4;margin-bottom:18px}.scene-nav{display:flex;padding:5px;background:#0b1326ae;border:1px solid var(--line);border-radius:999px;backdrop-filter:blur(16px);pointer-events:auto;box-shadow:0 10px 40px #0003}.nav-button{border:1px solid transparent;background:none;padding:13px 24px;border-radius:999px;color:#9aa9c9;font-size:13px;transition:.2s}.nav-button span{font-size:16px;margin-right:8px;color:#acb7df}.nav-button.active{color:#d5f1ff;border-color:#bddaff30;background:#aec7ff16}.replay{pointer-events:auto;font-size:10px;letter-spacing:1px;margin-top:6px}.letter-layer{position:fixed;inset:0;z-index:10;background:linear-gradient(90deg,#060a1bcc,#0a1020aa 50%,#060a1bcc);backdrop-filter:blur(7px)}.back-button{position:absolute;top:35px;left:40px;background:none;color:#b4c9e2;font-size:13px;z-index:2;padding:10px}.letter-scroll{height:100%;overflow-y:auto;padding:115px 28px 80px;overscroll-behavior:contain}.letter-content{max-width:600px;margin:auto}.letter-content>.eyebrow{text-align:center}.letter-content h2{text-align:center;font-family:"Noto Serif SC","Songti SC","SimSun",serif;font-size:30px;font-weight:400;letter-spacing:4px;line-height:1.6}.little-rule{display:flex;align-items:center;gap:24px;color:#b6bfff;margin:32px auto 45px;width:160px}.little-rule:before,.little-rule:after{content:"";height:1px;flex:1;background:linear-gradient(90deg,transparent,#9baade)}.little-rule:after{transform:rotate(180deg)}#letter-body p{font-family:"Noto Serif SC","Songti SC","SimSun",serif;font-size:17px;line-height:2.4;color:#c4cbe1;white-space:pre-wrap;margin-bottom:24px}.signature{text-align:right;color:#acb6d6;line-height:2;margin-top:40px;font-size:15px}.letter-end{text-align:center;color:#7989b0;font-size:11px;margin-top:60px;letter-spacing:2px}.letter-end span{display:block;font-size:22px;margin-top:20px;color:#9baee8}dialog{color:var(--ink);border:1px solid var(--line);background:#0e162a;max-height:92dvh}dialog::backdrop{background:#020613cc;backdrop-filter:blur(10px)}.close-button{background:#d0daff10;border:1px solid var(--line);border-radius:50%;width:36px;height:36px;font-size:24px;line-height:1;color:#c4d2eb;flex:none}.photo-dialog{padding:40px 28px 20px;border-radius:14px;max-width:min(90vw,850px);overflow:visible}.photo-dialog .close-button{position:absolute;right:10px;top:8px}.photo-dialog figure{margin:0}.photo-dialog img{display:block;max-width:80vw;max-height:66dvh;object-fit:contain;border-radius:3px}.photo-dialog figcaption{text-align:center;font-size:12px;color:#acb6cf;margin-top:14px}.photo-actions{display:flex;align-items:center;justify-content:center;gap:24px;margin-top:12px;font-size:11px;color:#93a7ca}.photo-actions button{background:transparent;padding:10px 20px;color:#b8d4ff}.editor{width:570px;max-width:calc(100vw - 24px);border-radius:22px;padding:30px 32px;scrollbar-width:thin}.editor-header{display:flex;justify-content:space-between;align-items:center;gap:10px}.editor-header h2{font-size:24px;font-weight:400;margin:10px 0}.editor-header .eyebrow{font-size:9px}.editor-note{font-size:12px;line-height:1.9;color:#8c9dbd;background:#aec7ff07;padding:15px;border:1px solid #9dbbff15;border-radius:10px}.edit-section{border-top:1px solid var(--line);padding-top:18px;margin-top:25px}.edit-section h3{font-size:15px;font-weight:500;display:flex;align-items:center;gap:12px}.edit-section h3>span{font-size:11px;color:#6e85ac}.edit-section h3 small{margin-left:auto;color:#8fa4cc;font-size:11px}.edit-section>label:not(.upload-button){display:flex;flex-direction:column;gap:8px;font-size:12px;color:#a8b7d1;margin-top:16px}input:not([type=file]):not([type=range]),textarea,select{width:100%;background:#080f21;color:#dbe5f5;border:1px solid #9dbbff26;border-radius:8px;padding:12px;font-size:14px;line-height:1.7}textarea{resize:vertical}input[type=range]{accent-color:#a4bafa;width:100%}.muted{color:#8093b7;font-size:12px;line-height:1.8}.upload-button{display:inline-flex;align-items:center;padding:12px 17px;border:1px dashed #a6bbf244;border-radius:8px;font-size:12px;color:#b6cced;cursor:pointer}.upload-button input[type=file]{position:absolute;width:1px;height:1px;opacity:0;overflow:hidden}.photo-list{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:16px}.photo-tile{position:relative;aspect-ratio:1;border:1px solid var(--line);border-radius:7px;overflow:hidden}.photo-tile img{width:100%;height:100%;object-fit:cover}.photo-tile button{position:absolute;top:4px;right:4px;border-radius:50%;background:#0b102dd9;width:25px;height:25px;color:white;font-size:18px}.music-row{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:12px;font-size:12px}.music-row>span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:#a5b8d9}.editor-actions{display:flex;gap:12px;margin-top:20px;flex-wrap:wrap}.editor-actions .primary{font-size:13px;min-width:170px}.backup-row{display:flex;gap:15px;flex-wrap:wrap;margin-top:14px}.plain{border:0;padding:10px 3px}.editor-status{color:#a4decc;font-size:12px;line-height:1.8;min-height:20px}.toast{position:fixed;z-index:30;bottom:180px;left:50%;transform:translateX(-50%);background:#15213ef0;border:1px solid #9fb9ff33;border-radius:12px;padding:14px 22px;box-shadow:0 10px 40px #0004;color:#d0def3;font-size:13px;line-height:1.8;max-width:calc(100vw - 40px);width:max-content;text-align:center}.fallback-stars{background-image:radial-gradient(1px 1px at 20% 30%,#dbe8ff 99%,transparent),radial-gradient(2px 2px at 60% 60%,#aeb8ff 99%,transparent);background-size:110px 130px,187px 157px}
@media(max-width:700px){.topbar{padding:22px 20px}.wordmark{font-size:14px;letter-spacing:2px;gap:8px}.wordmark small{font-size:6px;letter-spacing:1.3px}.star{font-size:24px}.tools{gap:7px}.icon-button{width:37px;height:37px;font-size:18px}.desktop-tool{display:none}.welcome{justify-content:flex-end;align-items:center;text-align:center;padding:110px 25px max(62px,12dvh);background:linear-gradient(0deg,#060a1be8,transparent 88%)}.welcome .eyebrow{font-size:8px;letter-spacing:2px;margin-bottom:19px}.welcome-to{font-size:12px;margin-bottom:10px}.welcome h1{font-size:34px;line-height:1.55;letter-spacing:2px}.subtitle{font-size:11px;letter-spacing:.6px;margin:18px 0 25px}.welcome-note{margin-top:18px;font-size:10px}.primary{padding:14px 24px;font-size:14px}.scene-heading{top:14%}.scene-heading h2{font-size:30px;letter-spacing:5px}.scene-heading>p:last-child{font-size:10px;letter-spacing:1px;padding:0 20px}.eyebrow{font-size:8px;letter-spacing:2px}.scene-footer{bottom:max(22px,env(safe-area-inset-bottom))}.nav-button{font-size:11px;padding:12px 13px}.nav-button span{font-size:14px;margin-right:5px}.scene-nav{max-width:95vw}.gesture-hint{font-size:9px;margin-bottom:15px}.intro .quiet-button{right:20px;bottom:30px}.back-button{top:22px;left:16px}.letter-scroll{padding:100px 28px 70px}.letter-content h2{font-size:26px}#letter-body p{font-size:16px;line-height:2.25}.editor{padding:23px 20px;border-radius:15px}.photo-list{grid-template-columns:repeat(3,1fr)}.editor-actions{gap:10px}.editor-actions .primary{min-width:155px}.editor-actions .quiet-button{padding:12px}.photo-dialog{padding:45px 15px 10px}.photo-dialog img{max-width:78vw;max-height:65dvh}.toast{font-size:12px;bottom:165px}}
@media(max-height:570px) and (min-width:701px){.welcome{padding-top:80px;padding-bottom:35px}.welcome .eyebrow{margin-bottom:14px}.welcome h1{font-size:35px}.subtitle{margin:12px 0 18px}.welcome-note{margin-top:12px}.scene-heading{top:13%}.scene-heading h2{font-size:26px;margin:5px}.scene-footer{bottom:7px}.gesture-hint{margin:5px}.topbar{padding:15px 25px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
.letter-layer{opacity:0;visibility:hidden;pointer-events:none;background:linear-gradient(90deg,rgba(4,8,26,.72),rgba(8,13,32,.58) 50%,rgba(4,8,26,.72));backdrop-filter:blur(1px);transition:opacity .58s ease,visibility .58s ease}
.letter-layer.open{opacity:1;visibility:visible;pointer-events:auto}
.letter-scroll{position:relative;z-index:1;transform:translateY(22px) scale(.985);opacity:.7;transition:transform .85s cubic-bezier(.16,1,.3,1),opacity .7s ease}
.letter-layer.open .letter-scroll{transform:translateY(0) scale(1);opacity:1}
.letter-particle-canvas{position:fixed;inset:0;z-index:2;pointer-events:none}
.letter-glyph{opacity:0;transition:opacity .28s ease,text-shadow .5s ease}
.letter-glyph.revealed{opacity:1;text-shadow:0 0 12px rgba(166,200,255,.18)}
.experience,.topbar{transition:opacity .55s ease}
.reading-letter .experience,.viewing-photo .experience,.reading-letter .topbar,.viewing-photo .topbar{opacity:0;pointer-events:none}
.reading-letter .scene-nav,.reading-letter .replay,.viewing-photo .scene-nav,.viewing-photo .replay{pointer-events:none}
.reading-letter .topbar{opacity:1;z-index:12;pointer-events:none}
.reading-letter .wordmark{visibility:hidden}
.reading-letter #fullscreen,.reading-letter #manage{display:none}
.reading-letter #music-toggle{pointer-events:auto}
@media(min-width:701px){
  .intro .eyebrow{bottom:12%;letter-spacing:3px;color:#a2b9dd}
  .letter-content{max-width:650px}
  #letter-body p{font-size:20px;line-height:2.15;letter-spacing:.5px;color:#d1d7e8}
  .letter-glyph{transition:opacity .32s ease;text-shadow:none}
  .letter-glyph.revealed{text-shadow:0 0 9px rgba(166,200,255,.08)}
}
@media(min-width:701px){
  .photo-dialog[open]{display:flex;flex-direction:column;justify-content:center;align-items:center;gap:10px;position:fixed;inset:0;width:100vw;height:100dvh;max-width:none;max-height:none;margin:0;padding:60px 30px 35px;border:0;border-radius:0;background:transparent;overflow:hidden}
  .photo-dialog::backdrop{background:rgba(3,7,24,.45);backdrop-filter:blur(1px)}
  .photo-dialog figure{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:0;max-width:100%}
  .photo-dialog img{max-width:min(75vw,920px);max-height:70dvh;object-fit:contain;border:0;border-radius:0;box-shadow:0 20px 70px rgba(0,0,0,.36),0 0 65px rgba(106,147,255,.12)}
  .photo-dialog .close-button{position:fixed;right:38px;top:30px}
  .photo-dialog .photo-actions{margin-top:0}
  .photo-dialog figcaption,.photo-dialog .photo-actions,.photo-dialog .close-button{opacity:1;transition:opacity .3s ease}
  .photo-dialog.photo-entering figcaption,.photo-dialog.photo-entering .photo-actions,.photo-dialog.photo-entering .close-button{opacity:0}
}
.topbar{justify-content:flex-end;pointer-events:none}
.topbar .tools{pointer-events:auto}
.awaiting-gift #music-toggle,.awaiting-gift #fullscreen{display:none}
.awaiting-gift #manage{opacity:.55}
#welcome{align-items:center;justify-content:center;text-align:center;padding:32px;background:transparent;gap:26px}
#welcome.departing{pointer-events:none}
.gift-start{position:relative;isolation:isolate;overflow:hidden;padding:28px 52px;border:1px solid rgba(174,194,246,.38);border-radius:18px;background:linear-gradient(120deg,rgba(96,133,204,.12),rgba(101,85,170,.14));box-shadow:inset 0 0 28px rgba(143,189,255,.04),0 0 70px rgba(103,125,214,.12);backdrop-filter:blur(3px);font-family:"Noto Serif SC","Songti SC","SimSun",serif;font-size:clamp(23px,2.3vw,34px);font-weight:400;letter-spacing:4px;color:#e0e9ff;text-shadow:0 0 24px rgba(169,195,255,.35);transition:transform .45s ease,border-color .45s ease,box-shadow .45s ease,background .45s ease}
.gift-start::before{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(110deg,transparent 25%,rgba(187,214,255,.1) 48%,transparent 70%);transform:translateX(-150%);animation:gift-shimmer 7s ease-in-out infinite}
.gift-start:hover{transform:translateY(-3px);border-color:rgba(189,210,255,.7);background:linear-gradient(120deg,rgba(96,133,204,.2),rgba(101,85,170,.22));box-shadow:inset 0 0 30px rgba(143,189,255,.07),0 0 85px rgba(119,142,236,.2)}
.gift-start:active{transform:scale(.98)}
.gift-start:disabled{opacity:.45}
.intro .eyebrow:empty{display:none}
#fireworks-toggle.muted{opacity:.5}
#fireworks-toggle.muted::after{content:"";position:absolute;width:22px;height:1px;background:currentColor;transform:rotate(-45deg)}
@keyframes gift-shimmer{0%,45%{transform:translateX(-150%)}85%,100%{transform:translateX(150%)}}
@media(max-width:700px){.gift-start{padding:24px 25px;letter-spacing:2px;border-radius:15px;max-width:100%}}
@media(prefers-reduced-motion:reduce){.gift-start::before{animation:none}}
@media(min-width:701px){.scene-nav{gap:16px;padding:7px}.nav-button{padding:14px 28px}}
.letter-closing-rule{margin:54px auto 12px}
.photo-dialog img{touch-action:none;user-select:none;transform-origin:center;will-change:transform}
.photo-dialog img.zoomed{cursor:grab}
.photo-dialog img.dragging{cursor:grabbing}
.photo-dialog .photo-actions{position:relative;z-index:2;background:rgba(10,17,38,.78);border:1px solid var(--line);border-radius:999px;backdrop-filter:blur(12px);gap:12px;padding:3px 10px;flex-shrink:0}
.photo-dialog .photo-actions button{padding:10px 12px}
.photo-dialog .photo-actions button:disabled{opacity:.3;cursor:default}
#photo-zoom-reset{min-width:56px;font-variant-numeric:tabular-nums}
.photo-tool-divider{height:16px;width:1px;background:var(--line);margin:0 2px}
.photo-dialog .close-button{z-index:3}
@media(min-width:701px){.photo-dialog .photo-actions{position:absolute;bottom:30px;left:50%;transform:translateX(-50%)}.photo-dialog figure{pointer-events:none}.photo-dialog img{pointer-events:auto}}