#app{font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,Helvetica Neue,Segoe UI,Microsoft YaHei,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}:root{--ios-blue: #007AFF;--ios-green: #34C759;--ios-red: #FF3B30;--ios-orange: #FF9500;--ios-yellow: #FFCC00;--ios-gray: #8E8E93;--ios-gray2: #AEAEB2;--ios-gray3: #C7C7CC;--ios-gray4: #D1D1D6;--ios-gray5: #E5E5EA;--ios-gray6: #F2F2F7;--bg-color: #F5F5F7;--surface-bg: #FFFFFF;--surface-muted: #F2F2F7;--card-bg: rgba(255,255,255,.86);--card-border: rgba(0,0,0,.08);--separator: rgba(60,60,67,.14);--text-primary: #1C1C1E;--text-secondary: rgba(60,60,67,.78);--text-tertiary: rgba(60,60,67,.54);--focus-ring: rgba(0,122,255,.24);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--shadow-sm: 0 1px 2px rgba(0,0,0,.04), 0 1px 8px rgba(0,0,0,.03);--shadow-md: 0 8px 24px rgba(0,0,0,.08), 0 2px 8px rgba(0,0,0,.04);--shadow-popover: 0 18px 50px rgba(0,0,0,.18), 0 4px 14px rgba(0,0,0,.08)}*{margin:0;padding:0;box-sizing:border-box}html,body{height:100%;font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,Helvetica Neue,Segoe UI,Microsoft YaHei,sans-serif;font-size:16px;line-height:1.5;color:var(--text-primary);background-color:var(--bg-color);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}#app{min-height:100vh}a{color:var(--ios-blue);text-decoration:none}button{font-family:inherit;font-size:inherit;cursor:pointer;border:none;outline:none;color:inherit}input,textarea,select{font-family:inherit;font-size:inherit;outline:none;color:var(--text-primary)}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{box-shadow:0 0 0 3px var(--focus-ring)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:32px;padding:6px 14px;border-radius:var(--radius-sm);font-weight:600;font-size:14px;transition:background-color .15s ease,border-color .15s ease,box-shadow .15s ease,transform .15s ease;letter-spacing:0;border:1px solid rgba(0,0,0,.08);-webkit-user-select:none;user-select:none}.btn:hover:not(:disabled){transform:translateY(-1px)}.btn:active:not(:disabled){transform:translateY(0)}.btn:disabled{cursor:not-allowed;opacity:.58}.btn-primary{background:var(--ios-blue);color:#fff;border-color:#0055b43d;box-shadow:0 1px 2px #007aff2e}.btn-primary:hover{background:#006fe6;box-shadow:0 4px 12px #007aff38}.btn-primary:disabled{background:var(--ios-gray3)}.btn-secondary{background:#ffffffd1;color:var(--text-primary);border-color:#0000001a;box-shadow:0 1px 2px #0000000a}.btn-secondary:hover{background:#fff}.btn-danger{background:#ff3b301f;color:#d70015;border-color:#ff3b3029;box-shadow:none}.btn-danger:hover{background:#ff3b302e}.btn-success{background:var(--ios-green);color:#fff;border-color:#0000001a;box-shadow:0 1px 2px #34c7592e}.btn-sm{min-height:28px;padding:4px 10px;font-size:13px}.btn-text{background:transparent;border-color:transparent;box-shadow:none;color:var(--ios-blue)}.btn-text:hover{background:#007aff14}.card{background:var(--card-bg);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border-radius:var(--radius-md);padding:16px;border:1px solid var(--card-border);box-shadow:var(--shadow-sm)}.container{max-width:800px;margin:0 auto;padding:16px}.page-header{display:flex;align-items:center;justify-content:space-between;padding:16px 0;margin-bottom:16px}.page-title{font-size:24px;font-weight:700;letter-spacing:0}.form-group{margin-bottom:16px}.form-label{display:block;margin-bottom:7px;font-size:13px;font-weight:600;color:var(--text-secondary)}.form-input{width:100%;min-height:40px;padding:9px 12px;border:1px solid rgba(0,0,0,.08);border-radius:var(--radius-sm);font-size:15px;background:#ffffffd1;transition:background-color .16s ease,border-color .16s ease,box-shadow .16s ease}.form-input:focus{background:#fff;border-color:#007aff75;box-shadow:0 0 0 3px var(--focus-ring)}.form-input::placeholder{color:#3c3c435c}.empty-state{text-align:center;padding:48px 20px;color:var(--text-tertiary)}.empty-state-icon{font-size:48px;margin-bottom:16px}.loading{display:flex;align-items:center;justify-content:center;padding:40px}.spinner{width:28px;height:28px;border:2px solid var(--ios-gray4);border-top-color:var(--ios-blue);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.toast{position:fixed;top:60px;left:50%;transform:translate(-50%);padding:14px 28px;background:#1c1c1ed1;backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);color:#fff;border-radius:var(--radius-md);font-size:15px;font-weight:500;z-index:9999;animation:fadeInDown .3s;box-shadow:var(--shadow-popover)}@keyframes fadeInDown{0%{opacity:0;transform:translate(-50%,-20px)}to{opacity:1;transform:translate(-50%)}}.q-badge{display:inline-block;padding:2px 7px;border-radius:6px;font-size:12px;font-weight:700;line-height:1.45}.q-badge-single{background:var(--ios-blue);color:#fff}.q-badge-multiple{background:var(--ios-orange);color:#fff}.q-badge-judgment{background:var(--ios-green);color:#fff}.q-badge-short_answer{background:var(--ios-orange);color:#fff}.q-badge-fill_blank{background:#8b5cf6;color:#fff}