: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}
.symbol-search{margin:16px 0 24px}
.symbol-search-input{width:100%;padding:14px 18px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);font-family:inherit;font-size:15px;color:var(--text);outline:none;transition:all .2s ease}
.symbol-search-input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(79,70,229,0.1)}
.symbol-search-input::placeholder{color:#9CA3AF}
.symbol-section{padding:0 0 32px}
.symbol-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:10px}
.symbol-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px;cursor:pointer;transition:all .25s ease;text-align:center;box-shadow:0 1px 2px rgba(0,0,0,.04)}
.symbol-card:hover{border-color:var(--primary);box-shadow:0 4px 16px rgba(79,70,229,.1);transform:translateY(-2px)}
.symbol-card.copied{border-color:var(--success);background:#F0FDF4}
.symbol-char{font-size:32px;font-weight:700;color:var(--text);margin-bottom:6px;line-height:1.2}
.symbol-en{font-size:12px;color:var(--primary);font-weight:600;margin-bottom:2px}
.symbol-cn{font-size:11px;color:var(--text-muted)}
.symbol-no-result{grid-column:1/-1;text-align:center;padding:40px;color:var(--text-muted);font-size:14px}
.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}.symbol-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr))}}