:root {
  --bg: #FAFAF9; --bg-alt: #F5F5F4; --surface: #FFFFFF; --border: #E7E5E4;
  --border-strong: #D6D3D1; --text: #1E293B; --text-secondary: #52525B;
  --text-muted: #71717A; --primary: #4F46E5; --primary-hover: #4338CA;
  --primary-light: rgba(79, 70, 229, 0.08); --secondary: #F97316; --accent: #EC4899;
  --success: #059669; --radius: 10px; --radius-lg: 14px;
}
*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}
body{font-family:'Inter','Noto Sans SC',system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh;-webkit-font-smoothing:antialiased}
.toast{position:fixed;top:24px;right:24px;background:var(--text);color:var(--bg);padding:10px 18px;border-radius:100px;font-size:14px;font-weight:500;display:flex;align-items:center;gap:8px;z-index:1000;transform:translateX(calc(100% + 40px));transition:transform .3s cubic-bezier(.34,1.56,.64,1);box-shadow:0 4px 16px rgba(0,0,0,0.12)}
.toast.show{transform:translateX(0)}.toast-dot{width:8px;height:8px;background:var(--success);border-radius:50%}
.page{max-width:960px;margin:0 auto;padding:0 32px}
::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:#f1f5f9}::-webkit-scrollbar-thumb{background:#A5B4FC;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#4F46E5}
::selection{background:rgba(79,70,229,.2);color:#1E293B}
.fc-section{padding:32px 0}
.fc-controls{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;box-shadow:0 4px 12px rgba(0,0,0,.06);margin-bottom:24px}
.fc-control-row{display:flex;gap:16px;align-items:flex-end;margin-bottom:16px}
.fc-field{flex:1;display:flex;flex-direction:column;gap:6px}
.fc-field-sm{max-width:140px}.fc-field-inline{max-width:140px;justify-content:flex-end}
.fc-label{font-size:13px;font-weight:500;color:var(--text-secondary);display:flex;justify-content:space-between;align-items:center}
.fc-label span{font-family:'SF Mono',monospace;font-size:12px;color:var(--primary);background:var(--primary-light);padding:2px 8px;border-radius:6px}
.fc-textarea{width:100%;padding:12px 14px;background:var(--bg-alt);border:1px solid var(--border);border-radius:var(--radius);font-family:'SF Mono','Cascadia Code','Fira Code',monospace;font-size:14px;color:var(--text);resize:vertical;outline:none;transition:all .2s ease;line-height:1.6}
.fc-textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(79,70,229,.1);background:var(--surface)}
.slider{width:100%;height:6px;-webkit-appearance:none;appearance:none;background:var(--border);border-radius:3px;outline:none;cursor:pointer}
.slider::-webkit-slider-thumb{-webkit-appearance:none;width:18px;height:18px;background:var(--primary);border-radius:50%;box-shadow:0 2px 6px rgba(79,70,229,.3);cursor:pointer}
.fc-checkbox-label{font-size:13px;color:var(--text-secondary);cursor:pointer;display:flex;align-items:center;gap:6px}
.fc-checkbox-label input{width:16px;height:16px;accent-color:var(--primary)}
.fc-font-select{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.fc-select-label{font-size:13px;color:var(--text-muted);white-space:nowrap;font-weight:500}
.fc-font-chips{display:flex;flex-wrap:wrap;gap:6px}
.fc-font-chip{padding:6px 14px;background:var(--bg-alt);border:1px solid var(--border);border-radius:100px;font-family:inherit;font-size:13px;font-weight:500;color:var(--text-muted);cursor:pointer;transition:all .15s ease}
.fc-font-chip:hover{border-color:var(--primary);color:var(--primary)}
.fc-font-chip.active{background:var(--primary);border-color:var(--primary);color:white}
.fc-panels{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.fc-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;box-shadow:0 4px 12px rgba(0,0,0,.06)}
.fc-panel-header{padding:12px 16px;background:var(--bg-alt);border-bottom:1px solid var(--border);font-size:13px;font-weight:600;color:var(--text)}
.fc-panel-body{padding:20px;font-family:inherit;white-space:pre-wrap;word-break:break-all;background:#1e1e1e;color:#d4d4d4;line-height:1.7;min-height:120px}
.guide-section{margin-top:24px;margin-bottom:64px;background:#fff;border:1px solid var(--border);border-radius:12px;overflow:hidden}
.guide-toggle{display:flex;align-items:center;justify-content:space-between;width:100%;padding:14px 20px;background:none;border:none;cursor:pointer;transition:background .15s ease}
.guide-toggle:hover{background:var(--bg-alt)}
.guide-toggle-title{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:#1E293B}
.guide-toggle.open .toggle-arrow{transform:rotate(180deg)}
.toggle-arrow{transition:transform .2s ease;color:var(--text-muted)}
.guide-list{padding:0 20px 20px}.guide-list.hidden{display:none}
.guide-item{padding:16px 0;border-top:1px solid var(--border)}
.guide-item:first-child{border-top:1px solid var(--border)}
.guide-item-title{font-size:14px;font-weight:600;color:#1E293B;margin-bottom:6px}
.guide-item-body{font-size:13px;color:var(--text-secondary);line-height:1.8}
@media(max-width:768px){.page{padding:0 16px}.fc-panels{grid-template-columns:1fr}.fc-control-row{flex-direction:column}.fc-field-sm{max-width:100%}.fc-field-inline{max-width:100%}}