:root{color-scheme:light;--ink:#191919;--muted:#666;--line:#dedede;--bg:#fafafa;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg)}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit;color:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}header,footer{max-width:1040px;margin:auto;padding:28px 32px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{font-size:18px;font-weight:650;letter-spacing:-.5px;text-decoration:none;color:var(--ink)}.brand span{color:var(--muted);font-weight:400}.language{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted)}select{background:transparent;border:1px solid var(--line);border-radius:6px;padding:9px;min-height:42px;color:var(--ink)}main{max-width:680px;margin:42px auto 56px;padding:0 24px}.intro{margin-bottom:32px}h1{font-size:clamp(26px,4.2vw,36px);font-weight:650;line-height:1.4;letter-spacing:-.8px;margin:0 0 12px}.intro p{font-size:15px;color:var(--muted);line-height:1.8;margin:0}.workbench{border:1px solid var(--line);border-radius:12px;background:#fff;padding:28px}.drop{position:relative;display:flex;align-items:center;justify-content:center;flex-direction:column;text-align:center;border:1px dashed #bbb;border-radius:8px;min-height:225px;padding:28px 16px;gap:13px;background:#fcfcfc;cursor:pointer}.drop:hover,.drop.over{background:#f1f1f1;border-color:#222}.drop input{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:pointer}.drop:focus-within{outline:2px solid #222;outline-offset:4px}.drop svg{margin-bottom:2px}.drop strong{font-size:16px;font-weight:600;overflow-wrap:anywhere;max-width:100%}.drop>span{font-size:12px;color:var(--muted);line-height:1.7}.drop .choose{color:var(--ink);border:1px solid #ccc;background:white;padding:7px 16px;border-radius:5px;font-weight:500}.setting{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-top:28px}.setting label{font-size:14px;font-weight:600}.setting p{font-size:12px;color:var(--muted);margin:7px 0 0}.number{border:1px solid #bbb;border-radius:6px;padding:10px;display:flex;align-items:center;gap:6px}.number:focus-within{outline:2px solid #222;outline-offset:2px}.number input{width:54px;border:0;background:transparent;font-size:20px;font-variant-numeric:tabular-nums;outline:none}.number span{font-size:12px;color:var(--muted)}.quality-note,.privacy{font-size:12px;line-height:1.8;color:var(--muted)}.quality-note{margin:20px 0}.primary,.secondary{display:block;width:100%;border-radius:6px;min-height:48px;padding:13px 16px;text-align:center;text-decoration:none;cursor:pointer;font-size:14px;font-weight:600}.primary{background:#202020;color:#fff;border:1px solid #202020}.primary:hover{background:#3b3b3b}.secondary{background:#fff;color:var(--ink);border:1px solid #ccc;margin-top:12px}.secondary:hover{background:#f5f5f5}.text-button{min-height:44px;background:transparent;border:0;text-decoration:underline;text-underline-offset:4px;cursor:pointer;padding:8px 0;font-size:13px}.privacy{border-top:1px solid var(--line);padding-top:20px;margin:24px 0 0}.status-top{display:flex;justify-content:space-between;align-items:center;gap:12px}.status-top h2{font-size:19px;font-weight:600;margin:0}.status-top>span{font-size:13px;font-variant-numeric:tabular-nums}progress{display:block;width:100%;height:7px;margin:24px 0;accent-color:#222}progress::-webkit-progress-bar{background:#eee;border-radius:4px}progress::-webkit-progress-value{background:#222;border-radius:4px}#status-note{font-size:14px;line-height:1.8;color:var(--muted)}.metrics{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 0}.metrics div{display:flex;flex-direction:column;gap:10px}.metrics span{font-size:12px;color:var(--muted)}.metrics strong{font-size:27px;font-weight:600;letter-spacing:-.5px;font-variant-numeric:tabular-nums}#saving{font-size:13px;margin:0 0 24px}.expiry{text-align:center;font-size:12px;line-height:1.7;color:var(--muted)}#validation{font-size:13px;line-height:1.7;border-left:2px solid #222;padding-left:12px}.details{margin-top:28px}details{border-bottom:1px solid var(--line)}summary{font-size:13px;padding:18px 0;cursor:pointer}details p{font-size:13px;line-height:1.9;color:var(--muted);margin:0 0 18px}footer{border-top:1px solid var(--line);font-size:12px;color:var(--muted)}:focus-visible{outline:2px solid #222;outline-offset:4px}[hidden]{display:none!important}@media(max-width:480px){header,footer{padding:20px}.language>span{display:none}main{margin-top:26px;padding:0 16px}.workbench{padding:20px}.intro{padding:0 4px}h1{font-size:27px}.metrics strong{font-size:23px}.drop{min-height:220px}.setting{gap:10px}footer{font-size:11px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}
.lang-links{display:flex;gap:14px}.lang-links a{color:inherit;text-underline-offset:3px}footer{flex-wrap:wrap}
.pricing-link{float:right;font-size:13px;color:var(--muted);text-underline-offset:4px;min-height:36px;padding:4px 0}.intro .beta-label{font-size:12px;color:var(--muted);margin-bottom:12px}.workbench>h2{font-size:18px;margin:12px 0}.workbench>p{font-size:14px;line-height:1.8;color:var(--muted)}.workbench>.primary+h2{margin-top:30px}.lang-links{flex-wrap:wrap}header .language select{max-width:160px}
.beian{color:inherit;text-decoration:none;white-space:nowrap}
.beian:hover{text-decoration:underline}