:root{--paper:#f3efe5;--paper-deep:#e8e0d1;--sheet:#fffdf7;--ink:#17262d;--muted:#667071;--line:#cfc7b8;--rust:#a94835;--rust-dark:#823326;--blue:#416f7d;--gold:#caa75e;--font-ui:"PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,sans-serif;--font-serif:"Songti SC",STSong,"Noto Serif SC","Iowan Old Style",Georgia,serif;--surface-border:#c8c0b1;--surface-shadow:12px 14px 0 #4f463a12,0 18px 46px #302c2513;--control-height:43px}html[lang=en]{--font-ui:"Inter","Avenir Next","Segoe UI",-apple-system,BlinkMacSystemFont,system-ui,sans-serif;--font-serif:"Iowan Old Style",Baskerville,Georgia,"Times New Roman",serif}*{box-sizing:border-box}html,body{min-height:100%;margin:0}body{color:var(--ink);font-family:var(--font-ui);-webkit-font-smoothing:antialiased;background:radial-gradient(circle at 12% 16%,#a9483512 0 1px,transparent 1.5px) 0 0/20px 20px, linear-gradient(115deg,#ffffff8a,transparent 38%), var(--paper)}body:before{content:"";z-index:-1;pointer-events:none;opacity:.28;mix-blend-mode:multiply;background:repeating-linear-gradient(0deg,#0000 0 5px,#1f2a2b06 5px 6px);position:fixed;inset:0}button,a,input,select,textarea{font:inherit}button:focus-visible,a:focus-visible{outline-offset:3px;outline:3px solid #416f7d47}[hidden]{display:none!important}html[lang=en] .upload-kicker,html[lang=en] .upload-card-header small,html[lang=en] .demo-heading span{letter-spacing:1.7px}html[lang=zh-CN] .upload-kicker,html[lang=zh-CN] .upload-card-header small,html[lang=zh-CN] .demo-heading span{letter-spacing:.14em;text-transform:none}.upload-nav{z-index:20;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);background:#faf7efdb;border-bottom:1px solid #4d473e33;justify-content:space-between;align-items:center;min-height:82px;padding:0 clamp(22px,4.5vw,72px);display:flex;position:relative}.upload-nav:after{content:"";background:var(--rust);width:31%;height:2px;position:absolute;bottom:-1px;right:0}.upload-brand{color:var(--ink);align-items:center;gap:12px;text-decoration:none;display:flex}.brand-mark{background:0 0;border-radius:50%;width:39px;height:39px;display:block;overflow:hidden}.brand-mark img{object-fit:cover;object-position:center;width:100%;height:100%;display:block}.brand-copy{flex-direction:column;gap:2px;display:flex}.brand-copy b{font-family:var(--font-serif);letter-spacing:.3px;font-size:22px;line-height:1}.brand-copy small{color:#6d6a62;letter-spacing:1.65px;font-size:8px;font-weight:750}.upload-nav-actions{align-items:center;gap:20px;display:flex}.library-shortcut{color:#40585b;min-height:34px;font:750 10px/1 var(--font-ui);letter-spacing:.3px;cursor:pointer;background:#fffdf7ad;border:1px solid #b8b1a5;padding:0 13px}.library-shortcut:hover{border-color:var(--rust);color:var(--rust)}.back-link{color:#5f6869;font-size:13px;text-decoration:none;position:relative}.back-link:after{content:"";transform-origin:100%;background:var(--rust);height:1px;transition:transform .2s;position:absolute;bottom:-5px;left:0;right:0;transform:scaleX(0)}.back-link:hover{color:var(--rust-dark)}.back-link:hover:after{transform-origin:0;transform:scaleX(1)}.upload-lang{background:#fffdf7b8;border:1px solid #bbb5a9;border-radius:999px;padding:3px;display:flex}.upload-lang button{color:#77746d;letter-spacing:.6px;cursor:pointer;background:0 0;border:0;border-radius:999px;min-width:34px;padding:5px 8px;font-size:10px;font-weight:750}.upload-lang button.on{background:var(--ink);color:#fffdf7}.upload-shell{width:min(1180px,100% - 40px);margin:0 auto;padding:36px 0 72px}.upload-hero{grid-template-columns:minmax(0,1fr) minmax(430px,.86fr);align-items:center;gap:clamp(54px,7vw,104px);min-height:354px;display:grid}.upload-intro{z-index:2;padding:16px 0 20px;position:relative}.upload-kicker{color:var(--rust);letter-spacing:2.1px;text-transform:uppercase;align-items:center;gap:13px;margin-bottom:22px;font-size:11px;font-weight:800;display:flex}.upload-kicker:before{content:"";background:currentColor;width:42px;height:2px}.upload-intro h1{max-width:670px;font-family:var(--font-serif);letter-spacing:-1.8px;white-space:pre-line;margin:0;font-size:clamp(46px,5.6vw,72px);font-weight:650;line-height:1.12}.upload-intro h1:after{content:"";background:var(--rust);vertical-align:baseline;border-radius:50%;width:.24em;height:.24em;margin-left:.08em;display:inline-block}.upload-intro p{color:#5e696a;letter-spacing:.05px;max-width:610px;margin:23px 0 0;font-size:15px;line-height:1.9}.hero-actions{align-items:center;gap:10px;margin-top:24px;display:flex}.hero-actions button{min-height:42px;font:750 12px/1 var(--font-ui);cursor:pointer;border-radius:0;padding:9px 18px;transition:transform .18s,box-shadow .18s,background .18s}.hero-primary{border:1px solid var(--rust);background:var(--rust);color:#fffdf7;box-shadow:5px 5px #82332629}.hero-primary:hover{background:var(--rust-dark);transform:translate(-1px,-1px);box-shadow:7px 7px #82332624}.hero-secondary{color:#3f5755;background:#fffdf78f;border:1px solid #8e9894}.hero-secondary:hover{border-color:var(--blue);color:#294d4a;background:#f3f0e7}.hero-tags{flex-wrap:wrap;gap:8px;margin-top:28px;display:flex}.hero-tags span{color:#345c68;letter-spacing:1.25px;text-transform:uppercase;background:#fffdf76b;border:1px solid #416f7d61;border-radius:2px;padding:7px 11px;font-size:10px;font-weight:780}.hero-art{isolation:isolate;height:354px;position:relative}.art-grid{background-image:linear-gradient(#28393d17 1px,#0000 1px),linear-gradient(90deg,#28393d17 1px,#0000 1px);background-size:28px 28px;border:1px solid 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path+path{stroke:var(--rust);stroke-width:2.5px;stroke-dasharray:none;opacity:.8}.art-route circle{fill:var(--sheet);stroke:var(--blue);stroke-width:3px}.art-ticket{z-index:4;background:#fffdf7f2;border:1px solid #858078;flex-direction:column;justify-content:center;width:224px;min-height:92px;padding:16px 18px 14px;display:flex;position:absolute;bottom:34px;left:8px;transform:rotate(-2deg);box-shadow:8px 8px #caa75e4d}.art-ticket span{color:var(--rust);letter-spacing:2px;font-size:9px;font-weight:850}.art-ticket b{font-family:var(--font-serif);margin:6px 0 5px;font-size:17px}.art-ticket small{color:#77736d;letter-spacing:1.5px;font-size:8px}.art-seal{z-index:5;filter:drop-shadow(0 3px 4px #27252029);background:0 0;border-radius:50%;width:65px;height:65px;position:absolute;top:4px;left:26px;overflow:hidden;transform:rotate(-11deg)}.art-seal img{object-fit:cover;object-position:center;width:100%;height:100%;display:block}.start-mode{border-bottom:1px solid 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#bcb5aa;grid-column:1/-1;margin:0;padding:70px}.library-empty{background:#fffdf780;border:1px dashed #aaa396;grid-column:1/-1;grid-template-columns:58px minmax(0,1fr) auto;align-items:center;gap:18px;padding:28px;display:grid}.library-empty>span{border:1px solid var(--rust);width:54px;height:54px;color:var(--rust);font-family:var(--font-serif);border-radius:50%;place-items:center;font-size:25px;display:grid}.library-empty h3{font-family:var(--font-serif);margin:0;font-size:20px}.library-empty p{color:#717772;margin:5px 0 0;font-size:11px}.library-empty button{border:1px solid var(--rust);background:var(--rust);color:#fffdf7;cursor:pointer;min-height:40px;padding:8px 14px;font-weight:750}.progress-card header{justify-content:space-between;align-items:flex-start;gap:20px;display:flex}.progress-card header span{color:var(--rust);letter-spacing:2px;font-size:9px;font-weight:850}.progress-card h2{font-family:var(--font-serif);margin:5px 0 0;font-size:24px}.progress-card header b{color:#6c7777;font-variant-numeric:tabular-nums;font-size:12px}.progress-track{background:#ded9cf;height:5px;margin:24px 0 22px;overflow:hidden}.progress-track i{width:calc(var(--progress,.04) * 100%);background:var(--rust);height:100%;transition:width .35s;display:block}.progress-steps{grid-template-columns:1fr 1fr;gap:12px 24px;margin:0;padding:0;list-style:none;display:grid}.progress-steps li{color:#8a8b86;grid-template-columns:17px minmax(0,1fr);align-items:center;gap:9px;font-size:12px;display:grid}.progress-steps li:before{content:"";background:var(--sheet);border:1px solid #aaa99f;border-radius:50%;width:11px;height:11px}.progress-steps li.done{color:#4d5a5a}.progress-steps li.done:before{border-color:var(--blue);background:var(--blue);box-shadow:inset 0 0 0 2px var(--sheet)}.progress-steps li.active{color:var(--rust-dark);font-weight:700}.progress-steps li.active:before{border:3px solid var(--rust);box-shadow:0 0 0 3px #a948351f}.progress-card p{color:#687271;border-top:1px solid #dfdad0;min-height:42px;margin:20px 0 0;padding-top:16px;font-size:12px;line-height:1.65}.cancel-button{color:#596666;background:0 0;border:1px solid #aaa69e;margin:14px 0 0 auto;display:block}.upload-toast{z-index:50;background:var(--ink);color:#fffdf7;opacity:0;pointer-events:none;border:1px solid #ffffff40;border-radius:0;max-width:min(520px,100vw - 32px);padding:11px 18px;font-size:12px;transition:opacity .2s,transform .2s;position:fixed;bottom:28px;left:50%;transform:translate(-50%,18px)}.upload-toast.show{opacity:.97;transform:translate(-50%)}@media (width>=1440px){.upload-nav{padding-inline:clamp(52px,4vw,92px)}.upload-shell{width:min(1680px,100% - 96px);padding-top:44px}.upload-hero{grid-template-columns:minmax(540px,.92fr) minmax(600px,1.08fr);gap:clamp(76px,6vw,142px);min-height:430px}.upload-intro{padding-left:clamp(8px,1.5vw,28px)}.upload-intro h1{font-size:clamp(68px,4.25vw,84px)}.upload-intro p{max-width:720px;font-size:16px}.hero-art{height:430px}.art-grid{background-size:34px 34px;inset:10px 2px 20px 62px}.art-cover-main{width:342px;top:24px;right:72px}.art-cover-side{width:205px;bottom:18px;right:7px}.art-ticket{width:278px;min-height:108px;padding:20px 22px;bottom:38px;left:14px}.art-ticket b{font-size:20px}.art-seal{width:75px;height:75px;font-size:22px;top:0;left:34px}.start-mode{width:min(720px,100%);margin-top:38px}.start-mode button{min-height:60px;font-size:17px}.upload-card,.progress-card{margin-top:34px;padding:38px 42px}.upload-card{max-width:none}.progress-card{max-width:1380px}.upload-card-header{max-width:760px;margin-bottom:28px}.upload-card-header h2{font-size:27px}.upload-card-header p{font-size:13px}.drop-zone{min-height:300px}.demo-panel,.library-panel{margin-top:58px}.demo-heading h2{font-size:36px}.demo-heading p{max-width:520px;font-size:13px}.demo-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:34px 24px}.library-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.library-card{display:block}.library-card figure{height:150px;min-height:150px}.library-card-copy{min-height:170px}.demo-card h3{font-size:19px}.demo-card p{font-size:12px}.progress-steps{grid-template-columns:repeat(4,minmax(0,1fr))}}@media (width<=980px){.upload-hero{grid-template-columns:minmax(0,1fr) minmax(340px,.76fr);gap:38px}.hero-art{height:320px}.art-cover-main{width:236px;right:28px}.art-cover-side{width:142px}.art-ticket{width:198px}.demo-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.library-grid{grid-template-columns:1fr}.library-card{grid-template-columns:190px minmax(0,1fr);display:grid}.library-card figure{height:auto;min-height:190px}.library-card-copy{min-height:0}.demo-heading{flex-direction:column;align-items:start;gap:8px}.demo-heading p{text-align:left}}@media (width<=760px){.upload-nav{min-height:70px;padding:0 18px}.brand-copy small,.back-link{display:none}.upload-shell{width:min(100% - 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b{font-size:19px}.upload-nav-actions{gap:8px}.upload-intro h1{letter-spacing:-1px}.hero-tags{gap:6px}.hero-tags span{padding:6px 8px;font-size:8px}.hero-art{height:226px}.art-cover-main{border-width:5px;width:185px;right:22px}.art-cover-side{border-width:5px;width:105px}.art-ticket{width:164px;min-height:72px;padding:12px}.art-ticket span,.art-ticket small{font-size:7px}.art-ticket b{font-size:13px}.art-route{opacity:.85}.start-mode button{padding-inline:8px;font-size:13px}.upload-card-header p{display:none}.drop-zone{min-height:205px}.drop-zone>small{max-width:260px;line-height:1.5}.upload-actions{flex-direction:column-reverse}.upload-actions button{width:100%}.demo-grid{grid-template-columns:1fr}.demo-card h3{font-size:17px}}@media (prefers-reduced-motion:reduce){.drop-zone,.progress-track i,.upload-toast,.demo-card,.demo-card img,.upload-actions button{transition:none}}