:root{--bg: #f5f6f8;--panel: #ffffff;--ink: #16202e;--muted: #6b7688;--line: #e3e7ee;--accent: #2563eb;--accent-soft: #eaf0ff;--danger: #dc2626;--ok: #15803d;--warn: #b45309;--radius: 10px;--shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 8px 24px rgba(16, 24, 40, .06)}*{box-sizing:border-box}[hidden]{display:none!important}html,body{margin:0;padding:0}body{background:var(--bg);color:var(--ink);font:14px/1.6 -apple-system,BlinkMacSystemFont,Segoe UI,Microsoft YaHei,PingFang SC,Hiragino Sans GB,Roboto,sans-serif;-webkit-font-smoothing:antialiased}h1{font-size:17px;margin:0}p{margin:0}.muted{color:var(--muted)}.small{font-size:12px}.spacer{flex:1}.hint{color:var(--muted);font-size:12px;margin-top:8px}.hint strong{color:var(--ink)}.topbar{display:flex;align-items:center;gap:16px;flex-wrap:wrap;padding:14px 22px;background:var(--panel);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.brand{display:flex;align-items:center;gap:12px}.logo{display:grid;place-items:center;width:38px;height:38px;border-radius:10px;background:var(--accent-soft);color:var(--accent);font-size:19px}.tabs{display:flex;gap:6px;margin-left:auto;background:var(--bg);padding:4px;border-radius:999px}.tab{border:0;background:transparent;padding:7px 18px;border-radius:999px;cursor:pointer;font-size:13px;color:var(--muted);font-family:inherit}.tab.is-active{background:var(--panel);color:var(--ink);box-shadow:var(--shadow);font-weight:600}main{max-width:1180px;margin:0 auto;padding:18px 22px 60px;display:grid;gap:16px}.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;box-shadow:var(--shadow)}.settings-grid{display:flex;flex-wrap:wrap;gap:14px 18px;align-items:flex-end}.num-field{display:grid;gap:5px}.num-field>label{font-size:12px;color:var(--muted)}.num-field.actions{display:flex;align-items:center;gap:10px;margin-left:auto}.switch-field{display:flex;flex-direction:row;align-items:center;gap:10px;padding-right:6px}.switch{position:relative;display:inline-flex;align-items:center;gap:10px;cursor:pointer;user-select:none}.switch input{position:absolute;width:1px;height:1px;opacity:0;margin:0}.switch .track{position:relative;flex:none;width:46px;height:26px;border-radius:999px;background:#cbd5e1;transition:background .18s}.switch .track:after{content:"";position:absolute;top:3px;left:3px;width:20px;height:20px;border-radius:50%;background:#fff;box-shadow:0 1px 3px #10182847;transition:transform .18s}.switch input:checked+.track{background:var(--accent)}.switch input:checked+.track:after{transform:translate(20px)}.switch input:focus-visible+.track{outline:2px solid var(--accent-soft);outline-offset:2px}.switch 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button:hover{color:var(--accent);border-color:#c7d2fe;background:var(--accent-soft)}.saved-badge{font-size:12px;color:var(--ok);background:#ecfdf3;border-radius:999px;padding:4px 10px}.saved-badge.flash{animation:flash .9s ease}@keyframes flash{0%{background:#bbf7d0}to{background:#ecfdf3}}button.primary,button.ghost,button.link{font:inherit;cursor:pointer}button.primary{background:var(--accent);color:#fff;border:1px solid var(--accent);border-radius:8px;padding:8px 16px;font-weight:600}button.primary:hover{background:#1d4ed8}button.primary:disabled{opacity:.5;cursor:not-allowed}button.ghost{background:#fff;color:var(--ink);border:1px solid var(--line);border-radius:8px;padding:8px 14px}button.ghost:hover{border-color:#c7d2fe;color:var(--accent)}button.link{background:none;border:0;color:var(--accent);padding:0;text-decoration:underline}.drop{border:1.5px dashed #c7cede;border-radius:var(--radius);padding:28px 18px;text-align:center;background:#fbfcfe;transition:.15s}.drop.is-over{border-color:var(--accent);background:var(--accent-soft)}.toolbar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:10px}.file-name{font-weight:600}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:14px;margin-top:6px}.thumb{margin:0;display:grid;gap:6px}.thumb .page-box{cursor:zoom-in}.thumb.is-selected .page-box{outline:2px solid var(--accent);outline-offset:2px}.thumb figcaption{font-size:12px;color:var(--muted);display:flex;justify-content:space-between;gap:6px}.thumb.is-deleted figcaption{color:var(--danger)}.page-box{position:relative;overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:6px;line-height:0;min-height:60px}.page-box canvas{display:block;width:100%;height:auto}.page-box.is-rotated{background:repeating-linear-gradient(45deg,#fff,#fff 8px,#f7f8fa 8px 16px)}.crop-frame{position:absolute;border:1px dashed 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.2s}.modal{position:fixed;inset:0;background:#0f172a8c;display:grid;place-items:center;padding:20px;z-index:50}.modal-card{background:var(--panel);border-radius:12px;padding:14px 16px 16px;width:min(940px,100%);max-height:94vh;display:flex;flex-direction:column;box-shadow:0 20px 60px #0f172a59}.modal-head{display:flex;align-items:center;gap:10px;margin-bottom:10px}.stage-wrap{flex:1;overflow:auto;display:grid;place-items:center;background:#eef1f6;border-radius:8px;padding:14px}.stage{max-width:100%}.stage .page-box{box-shadow:0 6px 20px 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