:root{--scene-bg:#260d17;--ink:#fff1da;--accent:#edbe78;--collection:#f5f6f4;--line:color-mix(in srgb,var(--ink) 20%,transparent);font-family:"Microsoft YaHei","PingFang SC",sans-serif;color:var(--ink);background:var(--scene-bg);letter-spacing:0}
*{box-sizing:border-box}body{margin:0}button,input,textarea{font:inherit;letter-spacing:0}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button{color:inherit}button:focus-visible,a:focus-visible{outline:2px solid var(--accent);outline-offset:5px}button:disabled{cursor:wait;opacity:.6}button svg,a svg{width:19px;height:19px;stroke-width:1.5;flex:none}a{color:inherit;text-decoration:none}[hidden]{display:none!important}
#experience{height:calc(100svh - 64px);min-height:710px;max-height:1100px;position:relative;isolation:isolate;overflow:hidden;background:var(--scene-bg)}
#scene{position:absolute;inset:0;width:100%;height:100%;display:block;touch-action:pan-y;outline:none}
.topbar{position:absolute;top:0;left:0;right:0;padding:26px 46px;display:flex;align-items:center;justify-content:space-between;z-index:2}.brand{display:flex;align-items:center;gap:12px}.brand>svg{width:29px;height:29px;color:var(--accent)}.brand span{font-family:"STSong","SimSun",serif;font-size:21px}.brand small{display:block;font-family:Arial,sans-serif;font-size:8px;margin-top:6px;opacity:.7}.tools{display:flex;gap:8px}.icon-button{display:inline-grid;place-items:center;width:40px;height:40px;padding:0;border:1px solid var(--line);border-radius:50%;background:transparent;position:relative}.icon-button:hover{background:color-mix(in srgb,var(--ink) 10%,transparent)}[data-tip]:hover:after{content:attr(data-tip);position:absolute;top:47px;right:0;padding:7px 10px;border-radius:4px;white-space:nowrap;font-size:11px;background:var(--ink);color:var(--scene-bg);z-index:9}
.letter-heading{position:absolute;top:92px;left:20px;right:20px;text-align:center;pointer-events:none}.occasion{display:flex;justify-content:center;align-items:center;gap:12px;font-size:12px;margin:0 0 15px;color:var(--accent)}.tiny-line{width:26px;height:1px;background:currentColor;opacity:.65}h1{font-family:"STKaiti","KaiTi","STSong","SimSun",serif;font-size:48px;font-weight:400;line-height:1.35;margin:0}#previewSubtitle{font-size:12px;opacity:.75;margin:12px 0 0}.scene-caption{position:absolute;left:46px;top:47%;display:flex;flex-direction:column;gap:14px;font-size:10px;opacity:.55;pointer-events:none}.scene-caption span:last-child{writing-mode:vertical-rl;font-size:12px;line-height:1.8}
.letter-copy{position:absolute;bottom:109px;left:20px;right:20px;text-align:center;pointer-events:none}#recipient{font-size:12px;margin:0 0 10px;color:var(--accent)}#recipient:empty,#signature:empty{display:none}#previewMessage{font-family:"STSong","SimSun",serif;white-space:pre-line;overflow-wrap:anywhere;font-size:16px;line-height:1.9;max-width:600px;margin:0 auto}#signature{font-size:11px;margin:10px 0 0;opacity:.7}.letter-actions{position:absolute;left:20px;right:20px;bottom:32px;display:flex;justify-content:center;gap:18px;align-items:center}.primary-button,.text-button{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:44px;padding:0 22px;border-radius:4px;font-size:13px}.primary-button{background:var(--accent);color:var(--scene-bg);border:1px solid var(--accent)}.primary-button:hover{filter:brightness(1.09)}.text-button{background:transparent;border:1px solid var(--line)}.text-button:hover{background:color-mix(in srgb,var(--ink) 7%,transparent)}.gift-create{position:absolute;bottom:28px;left:50%;transform:translateX(-50%);white-space:nowrap;font-size:11px;opacity:.7}#sceneError{position:absolute;top:45%;left:10%;right:10%;text-align:center;font-size:14px;padding:20px;background:var(--scene-bg)}
#collection{background:var(--collection);color:#2e3638;padding:38px max(28px,calc((100% - 1240px)/2)) 0}.collection-heading{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:26px;gap:20px}.overline{font:9px Arial,sans-serif;color:#7b8381;margin:0 0 12px}h2{font-family:"STSong","SimSun",serif;font-size:25px;font-weight:400;margin:0}.collection-heading>span{font-size:11px;color:#7b8381}.festival-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:26px 18px}.festival{border:0;background:transparent;text-align:left;padding:0;min-width:0;color:#2e3638;border-radius:4px}.festival-picture{display:block;aspect-ratio:1.2;background:var(--thumb-bg);border-radius:4px;overflow:hidden;position:relative}.festival-picture img{width:100%;height:100%;object-fit:cover;transition:transform .5s}.festival:hover img{transform:scale(1.06)}.festival-picture:after{content:'';position:absolute;inset:0;border:2px solid transparent;border-radius:4px;transition:border-color .2s}.festival[aria-pressed=true] .festival-picture:after{border-color:#a78554}.festival-title{display:flex;align-items:center;justify-content:space-between;margin:12px 0 6px;font-size:14px}.festival-title svg{width:14px;height:14px;opacity:0}.festival[aria-pressed=true] .festival-title svg{opacity:1}.festival small{font-size:10px;color:#7b8381}.festival-placeholder{display:grid;place-items:center;height:100%;font:34px "KaiTi",serif;color:var(--thumb-ink)}footer{display:flex;justify-content:space-between;gap:18px;padding:28px 0;margin-top:34px;border-top:1px solid #dadeda;font-size:11px;color:#79817e}
dialog{width:min(440px,calc(100% - 32px));padding:30px;border:1px solid #d9ded8;border-radius:8px;color:#303c36;background:#fbfcfa;max-height:calc(100svh - 32px);overflow:auto;--ink:#303c36;--accent:#334d43;--scene-bg:#fbfcfa;--line:#d6dcd7}dialog::backdrop{background:rgba(8,16,16,.55);backdrop-filter:blur(7px)}.dialog-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:25px}.dialog-heading h2{font-size:23px;line-height:1.5}.dialog-heading .icon-button{flex:none;width:32px;height:32px}label{display:block;font-size:12px;margin-bottom:20px}input,textarea{display:block;width:100%;margin-top:9px;padding:11px 12px;border:1px solid #d8ded8;background:#fff;color:#303c36;border-radius:4px;font-size:14px;line-height:1.6;resize:vertical}input:focus,textarea:focus{outline:1px solid #698777}.field-meta{display:block;text-align:right;font-size:10px;color:#7b8381;margin-top:5px}.save-button{width:100%;margin-top:2px}.share-status{font-size:13px;line-height:1.8;color:#69756e;margin-bottom:24px}#shareUrl{font-size:11px}#toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%,20px);opacity:0;background:#f7faf6;color:#263e34;box-shadow:0 6px 30px #0003;padding:12px 20px;border-radius:4px;font-size:12px;max-width:calc(100% - 32px);pointer-events:none;z-index:20;transition:opacity .2s,transform .2s}#toast.show{opacity:1;transform:translate(-50%,0)}body.gift #collection{display:none}body.gift #experience{height:100svh}body.gift .letter-actions{display:none}
@media(min-width:1500px){#experience{max-height:1000px}.letter-heading{top:102px}h1{font-size:54px}}
@media(max-width:900px){.festival-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.topbar{padding:22px 26px}.scene-caption{left:26px}.collection-heading>span{display:none}}
@media(max-width:600px){#experience{min-height:660px;height:calc(100svh - 56px)}.topbar{padding:20px}.brand{gap:8px}.brand span{font-size:18px}.brand small{font-size:7px}.brand>svg{width:23px;height:23px}.tools{gap:6px}.icon-button{width:34px;height:34px}.icon-button svg{width:16px;height:16px}.letter-heading{top:98px}h1{font-size:35px}.occasion{font-size:10px;margin-bottom:10px}#previewSubtitle{font-size:11px;margin-top:8px}.scene-caption{left:18px;top:48%;font-size:8px}.scene-caption span:last-child{font-size:10px}.letter-copy{bottom:103px;left:26px;right:26px}#previewMessage{font-size:14px;line-height:1.8;max-width:330px}#recipient{font-size:11px;margin-bottom:7px}#signature{margin-top:6px}.letter-actions{gap:10px;bottom:30px}.primary-button,.text-button{min-height:42px;padding:0 15px;font-size:12px;gap:7px}.primary-button svg,.text-button svg{width:16px;height:16px}#collection{padding:26px 20px 0}.collection-heading{margin-bottom:22px}h2{font-size:22px}.overline{font-size:8px;margin-bottom:9px}.festival-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:22px 12px}.festival-picture{aspect-ratio:.9}.festival-title{font-size:12px;margin:10px 0 5px}.festival small{font-size:9px}footer{font-size:9px;padding:24px 0;line-height:1.8}dialog{padding:24px}.dialog-heading h2{font-size:21px}}
@media(max-width:360px){h1{font-size:31px}.topbar{padding:18px 14px}.brand span{font-size:17px}.tools{gap:4px}#previewMessage{font-size:13px}.letter-copy{left:20px;right:20px}}
.culture-link{pointer-events:auto;display:inline-flex;align-items:center;justify-content:center;gap:7px;margin-top:11px;padding:5px 7px;border:0;background:transparent;color:var(--accent);font-size:11px;line-height:1.4}.culture-link svg{width:13px;height:13px}.culture-link svg:last-child{width:10px}.culture-link:hover{opacity:.75}.culture-dialog{width:min(490px,calc(100% - 32px));padding:28px}.culture-dialog .dialog-heading{margin-bottom:18px}.culture-dialog .dialog-heading h2{font-size:21px}.culture-art{position:relative;height:145px;overflow:hidden;background:#e6e9e1;border-top:1px solid #d2d8ce;border-bottom:1px solid #d2d8ce}.culture-art img{width:100%;height:100%;object-fit:contain;background:var(--scene-bg)}#cultureSeal{position:absolute;right:12px;bottom:12px;padding:7px 5px;writing-mode:vertical-rl;border:1px solid #ba685d;background:#fff8eb;color:#a5443d;font:13px KaiTi,serif}#cultureVerse{font-family:KaiTi,STKaiti,serif;font-size:21px;line-height:1.8;white-space:pre-line;text-align:center;margin:23px 0 9px;color:#3c5145;overflow-wrap:anywhere}.culture-attribution{text-align:center;font-size:11px;color:#8d8977;margin:0 0 23px}.culture-text{font-size:13px;line-height:1.95;color:#59665d;margin:0 0 16px}.culture-detail{font-size:11px;line-height:1.8;color:#8e785a;border-top:1px solid #e0e4da;padding-top:16px;margin-bottom:0}.culture-source{font-size:11px;color:#566d5c;display:inline-flex;align-items:center;gap:4px;margin-top:16px}.culture-source svg{width:13px;height:13px}
@media(max-width:600px){.culture-link{margin-top:9px;font-size:10px}.culture-dialog{padding:22px}.culture-dialog .dialog-heading h2{font-size:20px}.culture-art{height:128px}#cultureVerse{font-size:19px}.culture-text{font-size:12px}}
.detail-button{position:absolute;right:24px;top:48%;z-index:2;width:34px;height:34px;background:color-mix(in srgb,var(--scene-bg) 88%,transparent)}.detail-button[aria-pressed=true]{border-color:var(--accent);color:var(--accent)}.detail-button svg{width:16px;height:16px}@media(max-width:600px){.detail-button{right:16px;width:30px;height:30px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

/* Each section is one screen; the scene remains a full-size interactive canvas. */
html{scroll-snap-type:y mandatory;scroll-behavior:smooth;scrollbar-width:none}html::-webkit-scrollbar{display:none}
#experience,body.gift #experience{height:100svh;min-height:0;max-height:none;scroll-snap-align:start;scroll-snap-stop:always}
#scene{height:100%;width:100%;touch-action:pan-y}
.topbar{padding:24px 32px;pointer-events:none}.topbar a,.topbar button{pointer-events:auto}.brand small{display:none}
.letter-heading{top:100px;left:32px;right:auto;text-align:left;z-index:1;max-width:calc(100% - 64px)}
.occasion{justify-content:flex-start;margin-bottom:10px}h1{font-size:42px}.culture-link{padding-left:0}
.scene-caption{display:none}.detail-button{top:50%;right:28px;background:transparent}
.letter-copy{bottom:135px;left:32px;right:32px;z-index:1;text-shadow:0 1px 12px var(--scene-bg)}
.letter-actions{bottom:64px;z-index:2}.letter-actions button{background:transparent;color:var(--ink);border-color:color-mix(in srgb,var(--ink) 25%,transparent);backdrop-filter:blur(8px);border-radius:4px;box-shadow:0 1px 0 #ffffff08 inset;min-height:44px}
.letter-actions button:hover{background:color-mix(in srgb,var(--ink) 8%,transparent)}
.icon-button{background:transparent;border-color:color-mix(in srgb,var(--ink) 22%,transparent);backdrop-filter:blur(5px)}
.screen-step{position:absolute;bottom:12px;left:calc(50% - 20px);z-index:2;border:0}
body.gift .screen-step{display:none}.gift-create{bottom:32px;z-index:2;background:transparent;backdrop-filter:blur(8px)}
#collection{height:100svh;min-height:0;scroll-snap-align:start;scroll-snap-stop:always;display:grid;grid-template-rows:auto minmax(0,1fr) auto;gap:22px;padding:28px max(28px,calc((100% - 1240px)/2)) 16px;background:#edf1ee;--ink:#30433c;--line:#b9c6be;--accent:#526e61}
.collection-heading{margin:0;align-items:center}.collection-heading h2{font-size:30px}.collection-heading .overline{font-size:11px;margin-bottom:7px}
.festival-grid{min-height:0;grid-template-columns:repeat(6,minmax(0,1fr));grid-template-rows:repeat(2,minmax(0,1fr));gap:20px 16px}
.festival{display:grid;grid-template-rows:minmax(0,1fr) auto;min-height:0}.festival-picture{aspect-ratio:auto;height:100%;border-radius:6px}.festival-picture img{object-fit:contain}
.festival-title{margin:9px 1px 0;font-size:13px}.festival small{display:none}footer{margin:0;padding:12px 0 0;font-size:10px}
@media(max-width:900px){.festival-grid{grid-template-columns:repeat(4,minmax(0,1fr));grid-template-rows:repeat(3,minmax(0,1fr))}}
@media(max-width:600px){
 .topbar{padding:calc(16px + env(safe-area-inset-top)) 20px}.brand span{font-size:18px}.brand>svg{width:21px}.tools{gap:7px}.icon-button{width:36px;height:36px}
 .letter-heading{top:calc(81px + env(safe-area-inset-top));left:22px;right:22px;max-width:none;text-align:center}.occasion{justify-content:center;font-size:10px}h1{font-size:32px}#previewSubtitle{font-size:11px;margin-top:7px}.culture-link{font-size:10px;margin-top:7px}
 .detail-button{right:16px;top:46%;width:32px;height:32px}
 .letter-copy{bottom:calc(119px + env(safe-area-inset-bottom));left:25px;right:25px}#previewMessage{font-size:14px;line-height:1.85;max-width:390px}#recipient{font-size:11px;margin-bottom:6px}#signature{margin-top:5px}
 .letter-actions{bottom:calc(60px + env(safe-area-inset-bottom));gap:12px;left:20px;right:20px}.letter-actions button{padding:0 14px;font-size:12px;min-height:42px}
 .screen-step{bottom:calc(9px + env(safe-area-inset-bottom));left:calc(50% - 18px)}
 #collection{padding:calc(22px + env(safe-area-inset-top)) 20px calc(16px + env(safe-area-inset-bottom));gap:16px}.collection-heading h2{font-size:25px}.festival-grid{grid-template-columns:repeat(3,minmax(0,1fr));grid-template-rows:repeat(4,minmax(0,1fr));gap:14px 11px}.festival-title{font-size:12px;margin-top:7px}footer{font-size:9px;padding-top:10px}
 .long-greeting #previewMessage{font-size:12px;line-height:1.55}.long-greeting .letter-copy{bottom:114px}
}
@media(max-height:700px){.letter-heading{top:70px}h1{font-size:28px}.occasion{margin-bottom:4px}#previewSubtitle{display:none}.culture-link{margin-top:3px}.letter-copy{bottom:106px}#previewMessage{font-size:12px;line-height:1.6}.letter-actions{bottom:49px}.screen-step{bottom:4px}#collection{gap:10px;padding-top:16px;padding-bottom:12px}.festival-grid{gap:9px}.collection-heading h2{font-size:22px}footer{padding-top:6px}.long-greeting .letter-copy{bottom:104px}.long-greeting #previewMessage{font-size:11px}}