@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;600&family=Noto+Serif+SC:wght@600;700&display=swap");*,:after,:before{box-sizing:border-box;margin:0;padding:0}:root{--ink:#1a1410;--paper:#f5f0e8;--paper2:#ede7d9;--accent:#c0392b;--muted:#8a7f72;--card:#faf7f2;--border:#d4cbbf;--success:#27ae60;--overlay:rgba(26,20,16,.45);--shadow-sm:0 1px 3px rgba(26,20,16,.06);--shadow-md:0 4px 12px rgba(26,20,16,.08);--shadow-lg:0 8px 24px rgba(26,20,16,.1);--radius-sm:4px;--radius-md:6px;--radius-lg:10px}[data-theme=dark]{--ink:#e8e0d6;--paper:#161412;--paper2:#211e1b;--accent:#e87461;--muted:#8a7f72;--card:#1e1b18;--border:#36322e;--success:#4caf7d;--overlay:rgba(0,0,0,.6);--shadow-sm:0 1px 3px rgba(0,0,0,.3);--shadow-md:0 4px 12px rgba(0,0,0,.4);--shadow-lg:0 8px 24px rgba(0,0,0,.5)}body{font-family:Noto Sans SC,PingFang SC,Microsoft YaHei,sans-serif;background:var(--paper);color:var(--ink);min-height:100vh;transition:background .3s ease,color .3s ease}button,input,select,textarea{font-family:inherit}input:focus,select:focus,textarea:focus{outline:none}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--muted)}::selection{background:var(--accent);color:#fff}@keyframes spin{to{transform:rotate(1turn)}}@keyframes fadeUp{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}@keyframes slideUp{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.kcard{transition:all .2s ease;cursor:pointer}.kcard:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--accent)!important}.kcard:hover .kcard-bar{background:var(--accent)!important}.kcard:hover .kcard-hint{opacity:1!important}.opt-item:not(.answered):hover{background:var(--paper2)!important;border-color:var(--ink)!important}.skeleton{background:linear-gradient(90deg,var(--border) 0,var(--card) 40%,var(--border) 80%);background-size:200% 100%;animation:shimmer 1.5s ease-in-out infinite;border-radius:var(--radius-sm)}.toast-enter{animation:slideUp .35s ease both}.toast-exit{animation:fadeIn .25s ease reverse both}