:root{--ink: #1E2A4F;--ink-light: #334073;--coral: #E05555;--coral-hover: #C94040;--paper: #F3F4F6;--surface: #FFFFFF;--slate: #475569;--slate-light: #94A3B8;--border: #E2E8F0;--green: #16A34A;--green-bg: #F0FDF4;--amber: #F59E0B;--amber-bg: #FFFBEB;--coral-bg: #FEF2F2;--font-display: "Noto Serif SC", "SimSun", "Times New Roman", serif;--font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--radius: 12px;--radius-sm: 8px;--shadow: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);--shadow-lg: 0 4px 24px rgba(0,0,0,.08), 0 1px 4px rgba(0,0,0,.04);--max-w: 760px;--transition: .2s ease}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-body);background:var(--paper);color:var(--ink);line-height:1.6;-webkit-font-smoothing:antialiased;min-height:100vh}.container{max-width:var(--max-w);margin:0 auto;padding:28px 20px 60px}.btn{display:inline-flex;align-items:center;gap:6px;padding:10px 24px;border:none;border-radius:var(--radius-sm);font-family:var(--font-body);font-size:.9rem;font-weight:500;cursor:pointer;transition:all var(--transition)}.btn-primary{background:var(--ink);color:#fff}.btn-primary:hover{background:var(--ink-light)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-danger{background:transparent;color:var(--coral);border:1px solid var(--coral)}.btn-danger:hover{background:var(--coral);color:#fff}.btn-sm{padding:6px 16px;font-size:.8rem}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:32px}@keyframes modalIn{0%{opacity:0;transform:translateY(16px) scale(.98)}to{opacity:1;transform:translateY(0) scale(1)}}@keyframes questionReveal{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes spin{to{transform:rotate(360deg)}}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}