.app{min-height:100vh}.home-container{text-align:center;animation:fadeIn .5s ease-in}.title{font-size:2.5rem;color:#fff;margin-bottom:.5rem;text-shadow:2px 2px 4px rgba(0,0,0,.2)}.subtitle{font-size:1.5rem;color:#ffffffe6;margin-bottom:3rem;font-weight:400}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1.5rem;margin-bottom:3rem;max-width:800px;margin-left:auto;margin-right:auto}.stat-card{background:#fff;border-radius:15px;padding:2rem;box-shadow:0 8px 16px #0000001a}.stat-number{font-size:3rem;font-weight:700;color:#667eea;margin-bottom:.5rem}.stat-label{font-size:1rem;color:#666}.button-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.5rem;max-width:1000px;margin:0 auto}.mode-button{background:#fff;border-radius:15px;padding:2rem;display:flex;flex-direction:column;align-items:center;gap:1rem;box-shadow:0 8px 16px #0000001a;transition:all .3s ease;position:relative}.mode-button:hover{transform:translateY(-5px);box-shadow:0 12px 24px #00000026}.mode-button.primary{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.button-icon{font-size:3rem}.button-text{font-size:1.2rem;font-weight:600}.button-desc{font-size:.9rem;opacity:.9;margin-top:-.5rem}.mode-button.primary .button-text,.mode-button.primary .button-desc{color:#fff}.practice-container{max-width:900px;margin:0 auto;animation:fadeIn .5s ease-in}.practice-header{background:#fff;border-radius:15px;padding:1.5rem;margin-bottom:2rem;box-shadow:0 4px 12px #0000001a}.progress-bar{height:8px;background:#e0e0e0;border-radius:4px;overflow:hidden;margin-bottom:1rem}.progress-fill{height:100%;background:linear-gradient(90deg,#667eea,#764ba2);transition:width .3s ease}.practice-info{display:flex;justify-content:space-between;align-items:center;color:#666;font-size:1rem}.question-card{background:#fff;border-radius:15px;padding:3.5rem 2.5rem 2.5rem;margin-bottom:2rem;box-shadow:0 8px 16px #0000001a;position:relative}.question-score-tag{position:absolute;top:1rem;right:1rem;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:.4rem .8rem;border-radius:20px;font-weight:700;font-size:.85rem;box-shadow:0 2px 8px #667eea4d;z-index:10}.question-title{font-size:1.3rem;color:#333;margin-bottom:2rem;line-height:1.8}.fill-blank-input input{width:100%;padding:1rem;font-size:1.1rem;border:2px solid #e0e0e0;border-radius:8px;transition:all .3s ease}.fill-blank-input input:focus{outline:none;border-color:#667eea;box-shadow:0 0 0 3px #667eea1a}.options-list{display:flex;flex-direction:column;gap:1rem}.option{padding:1.2rem;border:2px solid #e0e0e0;border-radius:10px;cursor:pointer;transition:all .3s ease;font-size:1.05rem}.option:hover{border-color:#667eea;background:#667eea0d}.option.selected{border-color:#667eea;background:#667eea1a}.option.correct{border-color:#4caf50;background:#4caf501a}.option.incorrect{border-color:#f44336;background:#f443361a}.answer-feedback{margin-top:2rem;padding:1.5rem;border-radius:10px}.answer-feedback.correct{background:#4caf501a;border:2px solid #4caf50}.answer-feedback.incorrect{background:#f443361a;border:2px solid #f44336}.feedback-header{font-size:1.2rem;font-weight:700;margin-bottom:.8rem}.feedback-content{font-size:1rem;line-height:1.6}.practice-actions{display:flex;gap:1rem;justify-content:center}.btn{padding:1rem 2.5rem;font-size:1.1rem;border-radius:10px;font-weight:600;transition:all .3s ease}.btn-primary{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.btn-success{background:linear-gradient(135deg,#4caf50,#45a049);color:#fff}.btn-secondary{background:#e0e0e0;color:#666}.btn:hover{transform:translateY(-2px);box-shadow:0 4px 12px #0003}.result-container{max-width:700px;margin:0 auto;animation:fadeIn .5s ease-in}.result-card{background:#fff;border-radius:20px;padding:3rem;box-shadow:0 12px 24px #0000001a;text-align:center}.result-title{font-size:2rem;color:#333;margin-bottom:2rem}.result-score{margin-bottom:2rem}.score-circle{width:200px;height:200px;margin:0 auto;background:linear-gradient(135deg,#667eea,#764ba2);border-radius:50%;display:flex;flex-direction:column;justify-content:center;align-items:center;color:#fff;box-shadow:0 8px 16px #0003}.score-number{font-size:3.5rem;font-weight:700}.score-label{font-size:1.2rem;margin-top:.5rem}.result-details{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;margin-bottom:2rem}.detail-item{padding:1.5rem;background:#f5f5f5;border-radius:10px}.detail-label{display:block;color:#666;margin-bottom:.5rem;font-size:.9rem}.detail-value{display:block;font-size:1.5rem;font-weight:700;color:#333}.result-summary{display:grid;grid-template-columns:repeat(auto-fill,minmax(100px,1fr));gap:.8rem;margin-bottom:2rem;padding:1.5rem;background:#f5f5f5;border-radius:10px}.summary-item{padding:.8rem;border-radius:8px;display:flex;justify-content:space-between;align-items:center;font-size:.9rem}.summary-item.correct{background:#4caf501a}.summary-item.incorrect{background:#f443361a}.result-actions{display:flex;gap:1rem;justify-content:center}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@media(max-width:768px){body{padding:10px}.title{font-size:1.5rem}.subtitle{font-size:1rem;margin-bottom:2rem}.stats-grid{grid-template-columns:repeat(3,1fr);gap:.8rem;margin-bottom:2rem}.stat-card{padding:1rem}.stat-number{font-size:2rem}.stat-label{font-size:.85rem}.button-grid{grid-template-columns:1fr;gap:1rem}.mode-button{padding:1.5rem}.button-icon{font-size:2.5rem}.button-text{font-size:1.1rem}.button-desc{font-size:.85rem}.practice-header{padding:1rem}.practice-info{font-size:.9rem;flex-wrap:wrap}.question-card{padding:3rem 1.5rem 1.5rem}.question-score-tag{top:.5rem;right:.5rem;padding:.3rem .6rem;font-size:.75rem}.question-title{font-size:1.1rem;line-height:1.6}.fill-blank-input input{padding:.8rem;font-size:1rem}.option{padding:1rem;font-size:.95rem;word-break:break-word}.answer-feedback{margin-top:1.5rem;padding:1rem}.feedback-header{font-size:1rem}.feedback-content{font-size:.9rem}.practice-actions,.result-actions{flex-direction:column;gap:.8rem}.btn{width:100%;padding:.9rem 1.5rem;font-size:1rem}.result-card{padding:2rem 1.5rem}.result-title{font-size:1.5rem}.score-circle{width:150px;height:150px}.score-number{font-size:2.5rem}.score-label{font-size:1rem}.result-details{grid-template-columns:1fr;gap:1rem}.detail-item{padding:1rem}.detail-label{font-size:.85rem}.detail-value{font-size:1.2rem}.result-summary{grid-template-columns:repeat(auto-fill,minmax(70px,1fr));gap:.6rem;padding:1rem}.summary-item{padding:.6rem;font-size:.8rem}}@media(max-width:480px){.title{font-size:1.3rem}.stats-grid{grid-template-columns:1fr}.stat-card{padding:1.2rem}.question-title{font-size:1rem}.option{padding:.8rem;font-size:.9rem}.score-circle{width:120px;height:120px}.score-number{font-size:2rem}.result-summary{grid-template-columns:repeat(auto-fill,minmax(60px,1fr))}}@media(max-width:768px)and (orientation:landscape){.score-circle{width:120px;height:120px}.result-details{grid-template-columns:repeat(2,1fr)}}*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Helvetica Neue,Helvetica,Arial,sans-serif;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh;padding:20px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;touch-action:manipulation;overflow-x:hidden}#root{max-width:1200px;margin:0 auto}button{cursor:pointer;border:none;outline:none;transition:all .3s ease;-webkit-user-select:none;user-select:none;touch-action:manipulation}button:hover{transform:translateY(-2px);box-shadow:0 4px 12px #00000026}button:active{transform:translateY(0)}@media(hover:none)and (pointer:coarse){button:hover{transform:none}button:active{transform:scale(.98);opacity:.9}}