.home[data-v-5b7052db]{padding:1rem 0}.welcome-card[data-v-5b7052db]{text-align:center;margin-bottom:2rem}.welcome-card h2[data-v-5b7052db]{font-size:1.5rem;margin-bottom:.5rem;color:var(--primary-color)}.welcome-card p[data-v-5b7052db]{color:var(--text-light)}.menu-grid[data-v-5b7052db]{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem}.menu-item[data-v-5b7052db]{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:2rem 1rem;border:none;cursor:pointer;transition:all .2s ease;text-align:center}.menu-item[data-v-5b7052db]:hover{transform:translateY(-4px);box-shadow:0 8px 20px #00000026}.menu-item[data-v-5b7052db]:active{transform:translateY(0)}.menu-icon[data-v-5b7052db]{font-size:3rem;margin-bottom:.75rem}.menu-title[data-v-5b7052db]{font-size:1.125rem;font-weight:600;color:var(--text-color);margin-bottom:.25rem}.menu-desc[data-v-5b7052db]{font-size:.875rem;color:var(--text-light)}@media (max-width: 480px){.menu-grid[data-v-5b7052db]{grid-template-columns:1fr}}.app[data-v-b2b7cfc7]{height:100vh;display:flex;flex-direction:column;overflow:hidden}.app-header[data-v-b2b7cfc7]{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:.75rem;text-align:center;box-shadow:0 2px 10px #0000001a;flex-shrink:0;height:50px;display:flex;align-items:center;justify-content:center}.app-header h1[data-v-b2b7cfc7]{margin:0;font-size:1.25rem;cursor:pointer}.app-main[data-v-b2b7cfc7]{flex:1;padding:.5rem;max-width:800px;margin:0 auto;width:100%;box-sizing:border-box;overflow-y:auto}*{margin:0;padding:0;box-sizing:border-box}:root{--primary-color: #667eea;--primary-dark: #764ba2;--success-color: #48bb78;--error-color: #f56565;--warning-color: #ed8936;--text-color: #2d3748;--text-light: #718096;--bg-color: #f7fafc;--card-bg: #ffffff;--border-color: #e2e8f0;--shadow: 0 4px 6px rgba(0, 0, 0, .1);--radius: 12px}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background-color:var(--bg-color);color:var(--text-color);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.625rem 1rem;font-size:.9rem;font-weight:500;border:none;border-radius:var(--radius);cursor:pointer;transition:all .2s ease;min-height:44px;min-width:44px}.btn-primary{background:linear-gradient(135deg,var(--primary-color) 0%,var(--primary-dark) 100%);color:#fff}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 4px 12px #667eea66}.btn-primary:active{transform:translateY(0)}.btn-success{background-color:var(--success-color);color:#fff}.btn-outline{background:transparent;border:2px solid var(--primary-color);color:var(--primary-color)}.btn-outline:hover{background:var(--primary-color);color:#fff}.card{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);padding:.75rem}.option-btn{display:flex;align-items:center;justify-content:center;width:100%;padding:.625rem .75rem;margin-bottom:0;font-size:1rem;text-align:center;background:var(--card-bg);border:2px solid var(--border-color);border-radius:var(--radius);cursor:pointer;transition:all .2s ease;min-height:44px}.option-btn:hover{border-color:var(--primary-color);background:#f0f4ff}.option-btn:active{transform:scale(.98)}.option-btn.correct{border-color:var(--success-color);background:#f0fff4}.option-btn.wrong{border-color:var(--error-color);background:#fff5f5}.option-btn.selected{border-color:var(--primary-color);background:#f0f4ff}.character-display{font-size:3.5rem;font-weight:700;text-align:center;padding:.5rem;color:var(--text-color)}.pinyin-display{font-size:1.25rem;text-align:center;color:var(--primary-color);margin-bottom:.25rem}.definition-display{font-size:.875rem;text-align:center;color:var(--text-light);margin-bottom:.5rem}.progress-bar{width:100%;height:6px;background:var(--border-color);border-radius:3px;overflow:hidden;margin-bottom:0}.progress-bar-fill{height:100%;background:linear-gradient(90deg,var(--primary-color),var(--primary-dark));border-radius:4px;transition:width .3s ease}.feedback{padding:.5rem;border-radius:var(--radius);text-align:center;font-weight:500;font-size:.875rem;margin:.5rem 0}.feedback.success{background:#f0fff4;color:var(--success-color)}.feedback.error{background:#fff5f5;color:var(--error-color)}@media (max-width: 480px){.character-display{font-size:3rem}.btn{width:100%}.card{padding:.5rem}}@media (max-height: 700px){.character-display{font-size:2.5rem}.pinyin-display{font-size:1rem}.definition-display{font-size:.75rem}}