:root{--bg: #ffffff;--fg: #0f172a;--muted: #64748b;--line: #e2e8f0;--soft: #f8fafc;--accent: #2563eb;--accent-soft: #dbeafe;--ok: #15803d;--err: #b91c1c;--radius: 10px;--maxw: 760px}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.65 -apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Roboto,Helvetica,Arial,sans-serif}main,.site-header,.site-footer{max-width:var(--maxw);margin:0 auto;padding:0 20px}.site-header{display:flex;align-items:baseline;gap:12px;padding-top:22px;padding-bottom:6px;flex-wrap:wrap}.brand{font-weight:700;font-size:17px;letter-spacing:-.01em;color:var(--fg);text-decoration:none}.tagline{color:var(--muted);font-size:13px}.lang-switch{margin-left:auto;font-size:13px;color:var(--accent);text-decoration:none;white-space:nowrap}.lang-switch:hover{text-decoration:underline}:lang(zh) body{line-height:1.75}:lang(zh) .lede,:lang(zh) .section-lede{line-height:1.8}h1{font-size:clamp(26px,5vw,38px);line-height:1.2;letter-spacing:-.02em;margin:28px 0 12px}.lede{font-size:17px;color:#334155;margin:0 0 28px}h2{font-size:21px;letter-spacing:-.01em;margin:44px 0 10px}.section-lede{color:#475569;margin:0 0 18px}.tool{border:1px solid var(--line);border-radius:var(--radius);padding:16px;background:var(--soft)}.dropzone{border:2px dashed #cbd5e1;border-radius:var(--radius);background:#fff;padding:34px 16px;text-align:center;cursor:pointer;transition:border-color .12s,background .12s}.dropzone:hover,.dropzone:focus-visible,.dropzone.dragging{border-color:var(--accent);background:var(--accent-soft);outline:none}.dz-icon{width:34px;height:34px;color:var(--accent)}.dz-title{font-weight:600;margin:8px 0 4px}.dz-hint{margin:0;font-size:13px;color:var(--muted)}.link{color:var(--accent);text-decoration:underline}.controls{display:flex;flex-wrap:wrap;align-items:flex-end;gap:14px;margin-top:16px}.field{display:flex;flex-direction:column;gap:5px;font-size:13px;color:#475569}.field select{font:inherit;padding:7px 10px;border:1px solid var(--line);border-radius:7px;background:#fff;color:var(--fg)}.field input[type=range]{width:150px;accent-color:var(--accent)}output{font-variant-numeric:tabular-nums;color:var(--fg);font-weight:600}button{font:inherit;border-radius:7px;cursor:pointer;border:1px solid transparent;padding:9px 18px}button:disabled{opacity:.5;cursor:default}.primary{background:var(--accent);color:#fff;font-weight:600;margin-left:auto}.primary:not(:disabled):hover{background:#1d4ed8}.secondary{background:#fff;border-color:var(--line);color:var(--fg)}.secondary:not(:disabled):hover{border-color:var(--accent);color:var(--accent)}.limit-note{margin:14px 0 0;padding:10px 12px;background:#fffbeb;border:1px solid #fde68a;border-radius:8px;font-size:14px;color:#92400e}.progress{margin-top:16px}.progress-bar{height:5px;background:var(--line);border-radius:3px;overflow:hidden}#progress-fill{height:100%;width:0;background:var(--accent);transition:width .18s ease}#progress-text{margin:7px 0 0;font-size:13px;color:var(--muted);overflow-wrap:anywhere}#results-wrap{margin-top:20px}.results-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.results-head h2{margin:0;font-size:16px}.results{list-style:none;margin:10px 0 0;padding:0;border-top:1px solid var(--line)}.row{display:grid;grid-template-columns:1fr auto auto auto;align-items:center;gap:10px;padding:9px 2px;border-bottom:1px solid var(--line);font-size:14px}.row-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.row-meta{color:var(--muted);font-size:12.5px;font-variant-numeric:tabular-nums;white-space:nowrap}.row-meta.err{color:var(--err);white-space:normal}.row-done .row-meta{color:var(--ok)}.row-dl{color:var(--accent);font-size:13px;text-decoration:none;white-space:nowrap}.row-dl:hover{text-decoration:underline}.row-rm{background:none;border:none;color:#94a3b8;font-size:19px;line-height:1;padding:2px 6px}.row-rm:hover{color:var(--err)}.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:12px}.card{border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px}.card h3{margin:0 0 6px;font-size:15px}.card p{margin:0;font-size:14px;color:#475569}table{width:100%;border-collapse:collapse;font-size:14.5px}th,td{text-align:left;padding:9px 8px;border-bottom:1px solid var(--line)}th{font-size:13px;color:var(--muted);font-weight:600}.note{font-size:13.5px;color:var(--muted)}.plans{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px}.plan{border:1px solid var(--line);border-radius:var(--radius);padding:18px}.plan.featured{border-color:var(--accent)}.plan h3{margin:0 0 4px;font-size:15px;display:flex;align-items:center;gap:8px}.badge{font-size:11px;font-weight:500;color:var(--accent);background:var(--accent-soft);border-radius:999px;padding:2px 8px}.price{margin:0 0 12px}.price strong{font-size:27px;letter-spacing:-.02em}.price span{color:var(--muted);font-size:13.5px;margin-left:6px}.plan ul{margin:0;padding-left:18px;font-size:14px;color:#475569}.plan li{margin-bottom:5px}.plan-note{margin:12px 0 0;padding-top:10px;border-top:1px solid var(--line);font-size:12.5px;color:var(--muted)}.faq details{border-bottom:1px solid var(--line)}.faq summary{cursor:pointer;padding:13px 0;font-weight:600;font-size:15px}.faq summary::marker{color:var(--muted)}.faq details p{margin:0 0 14px;color:#475569;font-size:14.5px}.site-footer{margin-top:56px;padding-top:18px;padding-bottom:40px;border-top:1px solid var(--line);color:var(--muted);font-size:13.5px}.site-footer a{color:var(--muted)}@media(max-width:560px){.primary{margin-left:0;width:100%}.row{grid-template-columns:1fr auto auto}.row-meta{grid-column:1 / -1;order:3}}
