*{margin:0;padding:0;box-sizing:border-box;font-family:'Microsoft YaHei','Segoe UI',Roboto,sans-serif}:root{--primary-color:#0066ff;--primary-light:#e6f0ff;--primary-dark:#0052cc;--secondary-color:#36cbcb;--text-color:#333333;--text-light:#666666;--border-color:#dddddd;--bg-color:#ffffff;--bg-light:#f5f7fa}.container{max-width:1200px;margin:0 auto;padding:40px;background-color:var(--bg-color);border-radius:8px;box-shadow:0 2px 16px rgba(0,0,0,0.08)}.header{text-align:center;margin-bottom:30px;padding-bottom:20px;border-bottom:1px solid var(--border-color)}h1{font-size:28px;color:var(--primary-color);font-weight:600;margin-bottom:10px}.subtitle{color:var(--text-light);font-size:16px}.form-group{margin-bottom:25px}label{display:block;margin-bottom:8px;font-weight:500;color:var(--text-color);font-size:16px}select{width:100%;padding:12px 15px;border:1px solid var(--border-color);border-radius:4px;font-size:16px;background-color:var(--bg-color);transition:all 0.3s}select:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 2px rgba(0,102,255,0.1)}button{width:100%;padding:14px;background-color:var(--primary-color);color:white;border:none;border-radius:4px;font-size:16px;font-weight:500;cursor:pointer;transition:all 0.3s}button:hover{background-color:var(--primary-dark);transform:translateY(-1px);box-shadow:0 4px 12px rgba(0,102,255,0.2)}button:active{transform:translateY(0)}.result{margin-top:30px;padding:25px;background-color:var(--bg-light);border-radius:8px;border-left:4px solid var(--primary-color)}h2{font-size:20px;color:var(--primary-color);margin-bottom:15px;font-weight:600}#result-content{font-size:16px;line-height:1.8;color:var(--text-color)}.result-item{margin-bottom:12px;padding-bottom:12px;border-bottom:1px dashed var(--border-color)}.result-item:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}.result-label{font-weight:500;color:var(--text-light);margin-right:8px}.result-value{font-weight:600;color:var(--primary-color)}@media(max-width:768px){.container{padding:25px;margin:15px}h1{font-size:24px}}.instructions{margin-top:40px;padding:25px;background-color:var(--bg-light);border-radius:8px}.instructions h2{font-size:20px;color:var(--primary-color);margin-bottom:20px;padding-bottom:10px;border-bottom:1px solid var(--border-color)}.instructions h3{font-size:16px;color:var(--text-color);margin-top:15px;margin-bottom:10px}.instructions p{color:var(--text-light);line-height:1.7;margin-bottom:10px}.instructions ul{padding-left:20px;margin-bottom:15px}.instructions li{color:var(--text-light);line-height:1.7;margin-bottom:8px}.upload-area{border:2px dashed var(--border-color);border-radius:6px;padding:40px 20px;text-align:center;margin-bottom:25px;cursor:pointer;transition:all 0.3s;background-color:var(--bg-light)}.upload-area:hover{border-color:var(--primary-color);background-color:rgba(0,102,255,0.05)}.upload-area i{font-size:48px;color:var(--primary-color);margin-bottom:15px}.upload-area p{color:var(--text-light);margin-bottom:10px}.button-group{display:flex;gap:15px;margin-bottom:30px}.button-group button{flex:1}#file-input{display:none}.btn-extract{background-color:#0066ff}.btn-extract:hover{background-color:#0052cc}.btn-download{background-color:#00b42a}.btn-download:hover{background-color:#00a327}.btn-clear{background-color:#ff7d00}.btn-clear:hover{background-color:#e67200}.checkbox-group{display:flex;flex-wrap:wrap;gap:15px;margin-top:10px}.checkbox-group label{display:flex;align-items:center;gap:5px;font-weight:normal;cursor:pointer}.checkbox-group input[type="checkbox"]{width:auto;margin:0}.result-attributes{margin-top:5px;display:flex;flex-wrap:wrap;gap:10px;font-size:14px}.result-attr{color:var(--text-light);padding:2px 8px;background-color:var(--bg-light);border-radius:4px}.result-attr i{margin-right:3px;color:var(--primary-color)}