:root{color-scheme:light;--bg:#f6f7f9;--panel:#ffffff;--panel-strong:#f0f3f7;--text:#172033;--muted:#687386;--border:#dce2ea;--primary:#2458d3;--primary-dark:#183f9c;--danger:#b3261e;--ok:#16704a;--shadow:0 12px 35px rgba(25,36,58,0.08)}*{box-sizing:border-box}body,html{margin:0;min-height:100%;background:var(--bg);color:var(--text);font-family:Arial,Microsoft YaHei,PingFang SC,sans-serif}button,input,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed}.page{min-height:100vh;padding:32px}.shell{width:min(1180px,100%);margin:0 auto}.topbar{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;margin-bottom:22px}.title{margin:0;font-size:28px;line-height:1.2}.subtitle{margin:8px 0 0;line-height:1.6}.badge,.subtitle{color:var(--muted)}.badge{border:1px solid var(--border);border-radius:999px;padding:8px 12px;background:var(--panel);white-space:nowrap}.grid{display:grid;grid-template-columns:minmax(0,430px) minmax(0,1fr);grid-gap:18px;gap:18px;align-items:start}.panel{background:var(--panel);border:1px solid var(--border);border-radius:8px;box-shadow:var(--shadow)}.panel-inner{padding:20px}.section-title{margin:0 0 14px;font-size:18px}.field{display:grid;grid-gap:8px;gap:8px;margin-bottom:16px}.label{color:var(--text);font-weight:700}.hint{color:var(--muted);font-size:13px;line-height:1.5}.input,.textarea{width:100%;border:1px solid var(--border);border-radius:8px;padding:12px 13px;background:#fff;color:var(--text);outline:none}.textarea{min-height:145px;resize:vertical;line-height:1.55}.optimized-box{display:grid;grid-gap:8px;gap:8px;border:1px solid var(--border);border-radius:8px;padding:12px;background:#f8fbff}.optimized-head{display:flex;align-items:center;justify-content:space-between;gap:10px;font-weight:800}.optimized-textarea{min-height:120px;background:#fff}.mini-button{border:1px solid var(--border);border-radius:7px;padding:6px 9px;background:#fff;color:var(--primary);font-size:12px;font-weight:800}.mini-button:hover{border-color:var(--primary)}.input:focus,.textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(36,88,211,.12)}.file-box{border:1px dashed #b9c4d2;border-radius:8px;padding:14px;background:#fbfcfe}.file-input{width:100%}.preview-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:10px;gap:10px;margin-top:12px}.preview{position:relative;overflow:hidden;border-radius:8px;border:1px solid var(--border);background:var(--panel-strong);aspect-ratio:1/1;display:grid;place-items:center}.preview-remove{position:absolute;top:8px;right:8px;border:0;border-radius:6px;padding:5px 8px;background:rgba(255,255,255,.92);color:var(--danger);font-size:12px;font-weight:800}.preview img,.result-image{width:100%;height:100%;object-fit:contain;display:block}.modes{display:grid;grid-gap:10px;gap:10px}.mode{width:100%;text-align:left;border:1px solid var(--border);border-radius:8px;background:#fff;padding:13px;color:var(--text)}.mode.active{border-color:var(--primary);box-shadow:0 0 0 3px rgba(36,88,211,.1)}.mode-head{display:flex;align-items:center;justify-content:space-between;gap:10px;font-weight:800}.mode-desc{color:var(--muted);margin-top:6px;font-size:13px;line-height:1.45}.actions{display:flex;gap:10px;flex-wrap:wrap}.button{border:0;border-radius:8px;padding:12px 16px;background:var(--primary);color:#fff;font-weight:800}.button:hover{background:var(--primary-dark)}.button.link{color:#fff;text-decoration:none}.button.secondary{background:#e8edf5;color:var(--text)}.button.secondary.link{color:var(--text)}.button.secondary:hover{background:#dce4ef}.button:disabled{background:#aab4c4}.status{margin-top:14px;padding:12px;border-radius:8px;background:#f2f5fb;color:var(--muted);line-height:1.5}.status.error{color:var(--danger);background:#fff1f1}.status.ok{color:var(--ok);background:#edf8f3}.result{min-height:520px}.result-stage{border-radius:8px;border:1px solid var(--border);background:#f9fafc;aspect-ratio:1/1;display:grid;place-items:center;overflow:hidden}.empty{text-align:center;color:var(--muted);padding:24px;line-height:1.6}.history{display:grid;grid-gap:10px;gap:10px;margin-top:14px}.history-item{display:flex;justify-content:space-between;gap:12px;align-items:center;border:1px solid var(--border);border-radius:8px;padding:10px 12px;background:#fff}.history-title{font-weight:800}.history-meta{color:var(--muted);font-size:13px;margin-top:3px}.link{color:var(--primary);text-decoration:none;font-weight:800}.lock-list{display:grid;grid-gap:8px;gap:8px;margin:0;padding:0;list-style:none}.lock-list li{color:var(--muted);line-height:1.5}.login{width:min(460px,100%);margin:80px auto}@media (max-width:900px){.page{padding:18px}.grid,.topbar{display:block}.badge{display:inline-block;margin-top:12px}.panel{margin-bottom:16px}}