:root{--accent: #4f46e5;--accent-weak: #eef2ff;--ok: #16a34a;--err: #dc2626;--border: #e5e7eb;--bg: #f5f6fa;--card: #ffffff;--text: #1f2937;--muted: #6b7280;--radius: 12px;--shadow: 0 1px 3px rgba(0, 0, 0, .08)}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text)}.app{min-height:100vh;display:flex;flex-direction:column}.topbar{display:flex;align-items:center;justify-content:space-between;padding:16px 28px;background:var(--card);border-bottom:1px solid var(--border);box-shadow:var(--shadow)}.logo{display:flex;align-items:center;gap:12px}.logo-icon{background:var(--accent);color:#fff;font-weight:800;font-size:13px;padding:6px 9px;border-radius:8px;letter-spacing:.5px}.logo h1{margin:0;font-size:20px}.tagline{color:var(--muted);font-size:14px}.container{flex:1;width:100%;max-width:1280px;margin:0 auto;padding:24px 28px;display:flex;flex-direction:column;gap:20px}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}.card-head{display:flex;align-items:center;gap:14px;margin-bottom:16px}.card-head h2{margin:0;font-size:17px}.card-head p{margin:2px 0 0}.step-badge{flex:none;width:32px;height:32px;border-radius:50%;background:var(--accent);color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center}.head-actions{margin-left:auto;display:flex;gap:8px}.muted{color:var(--muted)}.hint{color:var(--muted);font-size:13px;margin:8px 0}.pill{margin-left:auto;font-size:12px;padding:3px 10px;border-radius:999px;background:var(--accent-weak);color:var(--accent);font-weight:600}.pill.ok{background:#dcfce7;color:var(--ok)}.form-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.field{display:flex;flex-direction:column;gap:6px;font-size:13px;font-weight:500}.field.span2{grid-column:span 2}.field input,.field select,.field textarea,.add-recipient input{font-size:14px;padding:9px 11px;border:1px solid var(--border);border-radius:8px;background:#fafafa;font-family:inherit}.field input:focus,.field select:focus,.field textarea:focus,.add-recipient input:focus{outline:none;border-color:var(--accent);background:#fff}.field textarea{resize:vertical}.check-field{display:flex;align-items:center;gap:8px;font-size:13px}.pass-wrap{display:flex;gap:6px}.pass-wrap input{flex:1}.row-between{display:flex;align-items:center;gap:14px;margin-top:14px}.result{font-size:13px;font-weight:600}.result.ok{color:var(--ok)}.result.err{color:var(--err)}.btn{border:1px solid var(--border);background:#fff;color:var(--text);font-size:14px;font-weight:600;padding:9px 16px;border-radius:8px;cursor:pointer;transition:all .15s ease}.btn:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}.btn.primary:hover:not(:disabled){background:#4338ca;color:#fff}.btn.small{padding:6px 12px;font-size:13px}.ghost-btn{border:1px solid var(--border);background:#fff;color:var(--muted);font-size:12px;padding:5px 10px;border-radius:6px;cursor:pointer;text-decoration:none;display:inline-block}.ghost-btn:hover{color:var(--accent);border-color:var(--accent)}.main-row{display:grid;grid-template-columns:1.15fr 1fr;gap:20px;align-items:start}.dropzone{border:2px dashed var(--border);border-radius:var(--radius);padding:48px 20px;text-align:center;cursor:pointer;transition:all .15s ease;background:#fafbfd}.dropzone.over{border-color:var(--accent);background:var(--accent-weak)}.dz-icon{width:64px;height:64px;margin:0 auto 14px;border-radius:14px;background:var(--err);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;letter-spacing:.5px}.page-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(132px,1fr));gap:12px;max-height:560px;overflow:auto;padding:4px}.page-card{border:2px solid var(--border);border-radius:10px;overflow:hidden;cursor:grab;background:#fff;transition:all .12s ease;position:relative}.page-card:hover{border-color:var(--accent);box-shadow:var(--shadow)}.page-card.sel{border-color:var(--accent);background:var(--accent-weak)}.page-canvas{width:100%;height:auto;display:block;background:#fff}.page-meta{display:flex;align-items:center;justify-content:space-between;padding:6px 8px;font-size:12px;font-weight:500;background:#fafbfd;border-top:1px solid var(--border)}.add-recipient{display:flex;gap:10px;margin-bottom:6px}.add-recipient input:first-of-type{width:140px}.add-recipient input:nth-of-type(2){flex:1}.err-text{color:var(--err);font-size:13px;margin:4px 0}.empty-tip{text-align:center;padding:28px 0;border:2px dashed var(--border);border-radius:var(--radius);margin-top:10px}.empty-tip p{margin:4px 0}.recipient-grid{display:flex;flex-direction:column;gap:14px;max-height:560px;overflow:auto;padding:4px}.recipient-card{border:1px solid var(--border);border-radius:var(--radius);padding:14px;background:#fafbfd}.rc-head{display:flex;align-items:center;gap:10px;margin-bottom:10px}.avatar{width:36px;height:36px;border-radius:50%;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;flex:none}.rc-id{display:flex;flex-direction:column;min-width:0}.rc-id span{font-size:12px}.rc-del{margin-left:auto}.drop-zone{border:2px dashed var(--border);border-radius:8px;min-height:58px;padding:8px;display:flex;align-items:center;justify-content:center;transition:all .12s ease;background:#fff}.drop-zone.over{border-color:var(--accent);background:var(--accent-weak)}.drop-zone.filled{justify-content:flex-start}.dz-tip{margin:0;font-size:13px}.assigned{display:flex;flex-wrap:wrap;gap:6px}.chip{display:inline-flex;align-items:center;gap:6px;background:var(--accent-weak);color:var(--accent);font-size:12px;font-weight:600;padding:4px 8px;border-radius:999px}.chip-x{border:none;background:none;color:var(--accent);cursor:pointer;font-size:14px;line-height:1;padding:0}.rc-actions{margin:10px 0}.pdf-chip{display:flex;align-items:center;gap:10px;border:1px solid var(--border);border-radius:10px;padding:10px;background:#fff;cursor:grab;margin-bottom:10px;transition:all .12s ease}.pdf-chip:hover{border-color:var(--accent);box-shadow:var(--shadow)}.pdf-icon{width:38px;height:38px;flex:none;border-radius:8px;background:var(--err);color:#fff;font-weight:800;font-size:10px;display:flex;align-items:center;justify-content:center;letter-spacing:.5px}.pdf-info{display:flex;flex-direction:column;min-width:0;flex:1}.pdf-info strong{font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.pdf-info span{font-size:12px}.pdf-actions{display:flex;gap:6px;flex:none}.send-zone{border:2px dashed var(--ok);border-radius:8px;padding:10px;display:flex;align-items:center;justify-content:space-between;gap:10px;background:#f0fdf4;transition:all .12s ease}.send-zone.over{background:#dcfce7;border-color:#16a34a;transform:scale(1.01)}.status{font-size:13px;font-weight:600}.status.sending{color:var(--accent)}.status.ok{color:var(--ok)}.status.err{color:var(--err)}.error-boundary{max-width:520px;margin:40px auto;padding:32px;background:#fff;border:1px solid #fecaca;border-radius:var(--radius);text-align:center}.error-boundary h2{margin:0 0 8px;color:var(--err)}.error-boundary pre{text-align:left;background:#fef2f2;border:1px solid #fecaca;border-radius:8px;padding:12px;font-size:12px;overflow:auto;margin:12px 0 16px}.foot{padding:16px 28px;text-align:center;border-top:1px solid var(--border);background:var(--card)}.foot p{margin:0;font-size:13px}@media (max-width: 900px){.main-row{grid-template-columns:1fr}.form-grid{grid-template-columns:1fr 1fr}}