:root{--bg: #f6f7fb;--surface: #ffffff;--surface-2: #f9fafb;--border: #e6e8ee;--border-strong: #d4d7e0;--text: #1f2330;--text-muted: #6b7280;--text-faint: #9aa0ac;--accent: #6366f1;--accent-strong: #4f46e5;--accent-soft: #eef2ff;--accent-grad: linear-gradient(135deg, #6366f1, #8b5cf6);--success: #10b981;--danger: #ef4444;--radius: 12px;--radius-sm: 8px;--shadow-sm: 0 1px 2px rgba(16, 24, 40, .04), 0 1px 3px rgba(16, 24, 40, .06);--shadow-md: 0 4px 16px rgba(16, 24, 40, .08);--shadow-lg: 0 12px 40px rgba(16, 24, 40, .12);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,Roboto,Helvetica,Arial,sans-serif}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.app{min-height:100%;display:flex;flex-direction:column}.header{position:sticky;top:0;z-index:10;background:#ffffffd9;backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--border)}.header-inner{max-width:1400px;margin:0 auto;padding:0 24px;height:64px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:10px;color:var(--text);text-decoration:none}.brand:hover{text-decoration:none}.brand-mark{color:var(--accent);display:flex}.brand-text{display:flex;flex-direction:column;line-height:1.1}.brand-text strong{font-size:17px}.brand-text small{font-size:11px;color:var(--text-muted)}.header-nav{display:flex;align-items:center;gap:4px}.link-btn{appearance:none;background:transparent;border:none;color:var(--text-muted);font-size:14px;padding:8px 12px;border-radius:var(--radius-sm);cursor:pointer;text-decoration:none}.link-btn:hover{background:var(--surface-2);color:var(--text);text-decoration:none}.main{flex:1;width:100%;max-width:1400px;margin:0 auto;padding:32px 24px}.hero{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;min-height:60vh}.hero-text h1{font-size:40px;line-height:1.15;margin:0 0 16px;letter-spacing:-.02em}.hero-text .accent{background:var(--accent-grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.hero-lead{font-size:17px;color:var(--text-muted);margin:0 0 24px;line-height:1.6}.hero-feats{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px;color:var(--text-muted);font-size:15px}.dropzone{background:var(--surface);border:2px dashed var(--border-strong);border-radius:var(--radius);padding:56px 32px;text-align:center;cursor:pointer;transition:border-color .15s,background .15s,transform .15s;outline:none;min-height:360px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px}.dropzone:hover,.dropzone:focus-visible{border-color:var(--accent);background:var(--accent-soft)}.dropzone.is-dragging{border-color:var(--accent);background:var(--accent-soft);transform:scale(1.01)}.dropzone-icon{color:var(--accent);margin-bottom:8px}.dropzone h2{margin:0;font-size:18px}.dropzone p{margin:2px 0;color:var(--text-muted);font-size:14px}.dropzone-hint{font-size:12px!important;color:var(--text-faint)!important;margin-top:12px!important}.workspace{display:grid;grid-template-columns:340px 1fr;gap:24px;align-items:start}.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:4px;position:sticky;top:88px;max-height:calc(100vh - 112px);overflow-y:auto}.panel-section{padding:16px 18px;border-bottom:1px solid var(--border)}.panel-section:last-child{border-bottom:none}.panel-section h3{margin:0 0 14px;font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--text-faint)}.preset-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:6px}.preset-btn{appearance:none;background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius-sm);padding:8px 4px;font-size:13px;color:var(--text);cursor:pointer;transition:all .12s}.preset-btn:hover{border-color:var(--border-strong)}.preset-btn.is-active{background:var(--accent-soft);border-color:var(--accent);color:var(--accent-strong);font-weight:600}.field{margin-bottom:16px}.field:last-child{margin-bottom:0}.field-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:8px;gap:8px}.field-label{font-size:13px;font-weight:500}.field-value{font-size:13px;color:var(--accent-strong);font-variant-numeric:tabular-nums;font-weight:600}.field-hint{margin:6px 0 0;font-size:11.5px;color:var(--text-faint);line-height:1.4}.segmented{display:flex;background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius-sm);padding:3px;gap:2px}.seg-btn{flex:1;appearance:none;background:transparent;border:none;border-radius:6px;padding:6px 8px;font-size:13px;color:var(--text-muted);cursor:pointer;transition:all .12s;white-space:nowrap}.seg-btn:hover{color:var(--text)}.seg-btn.is-active{background:var(--surface);color:var(--accent-strong);font-weight:600;box-shadow:var(--shadow-sm)}.slider{-webkit-appearance:none;appearance:none;width:100%;height:4px;border-radius:2px;background:var(--border);outline:none;margin:0}.slider::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:16px;height:16px;border-radius:50%;background:var(--accent);border:2px solid #fff;box-shadow:0 1px 3px #0003;cursor:pointer;transition:transform .1s}.slider::-webkit-slider-thumb:hover{transform:scale(1.15)}.slider::-moz-range-thumb{width:16px;height:16px;border-radius:50%;background:var(--accent);border:2px solid #fff;box-shadow:0 1px 3px #0003;cursor:pointer}.preview{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);overflow:hidden}.preview-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 16px;border-bottom:1px solid var(--border);background:var(--surface-2)}.preview-toolbar .segmented{width:auto}.preview-actions{display:flex;gap:8px}.btn{appearance:none;border:1px solid var(--border);border-radius:var(--radius-sm);padding:8px 14px;font-size:13px;font-weight:500;cursor:pointer;transition:all .12s;background:var(--surface);color:var(--text)}.btn:hover:not(:disabled){border-color:var(--border-strong)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn-ghost{background:var(--surface)}.btn-primary{background:var(--accent-grad);border:none;color:#fff;box-shadow:0 1px 2px #6366f14d}.btn-primary:hover:not(:disabled){filter:brightness(1.05)}.preview-stage{position:relative;min-height:420px;display:flex;align-items:center;justify-content:center;gap:16px;padding:24px;background:repeating-conic-gradient(#f3f4f6 0 25%,#fff 0 50%) 50% / 24px 24px}.pane{display:flex;align-items:center;justify-content:center;max-width:100%;max-height:70vh}.pane-before,.pane-after{flex:1}.preview-stage:has(.pane-before:not([hidden])):has(.pane-after:not([hidden])) .pane{flex:1 1 0}.pane-img{max-width:100%;max-height:70vh;object-fit:contain;border-radius:var(--radius-sm)}.pane-svg{max-width:100%;max-height:70vh;width:auto;height:auto}.preview-overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#ffffffb3;backdrop-filter:blur(4px)}.progress-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-lg);padding:20px 28px;min-width:280px;text-align:center}.progress-label{font-size:14px;font-weight:500;margin-bottom:12px;color:var(--text)}.progress-bar{height:6px;background:var(--border);border-radius:3px;overflow:hidden}.progress-fill{height:100%;background:var(--accent-grad);border-radius:3px;transition:width .15s ease}.error-card{background:var(--surface);border:1px solid var(--danger);border-radius:var(--radius);box-shadow:var(--shadow-lg);padding:20px 28px;max-width:360px;text-align:center;color:var(--danger)}.preview-empty{color:var(--text-faint);font-size:14px}.preview-meta{display:flex;gap:16px;padding:10px 16px;border-top:1px solid var(--border);font-size:12px;color:var(--text-muted);background:var(--surface-2)}@media (max-width: 960px){.hero{grid-template-columns:1fr;gap:24px;min-height:auto}.hero-text h1{font-size:30px}.workspace{grid-template-columns:1fr}.panel{position:static;max-height:none}.preview-stage{min-height:320px}}@media (max-width: 560px){.main{padding:20px 16px}.header-inner{padding:0 16px}.preview-toolbar{flex-wrap:wrap}}