.app-container{max-width:800px;margin:20px auto;padding:20px}.card-title{margin:0;font-size:1.5em;color:#409eff}.upload-container{margin:20px 0;text-align:center}.operation-options,.split-options{margin-top:20px;display:flex;justify-content:center;align-items:center}.filter-content{margin-top:20px;display:flex;flex-direction:column;gap:20px}.input-section{width:100%;max-width:500px}.preview-section{background-color:#f8f9fa;padding:15px;border-radius:4px}.preview-title{color:#606266;margin-bottom:10px}.preview-tags{display:flex;flex-wrap:wrap;gap:8px}.number-tag{margin:0}.action-section{margin-top:10px}.number-input{width:100%}.number-input-row{display:flex;align-items:center;gap:10px;margin-bottom:10px}.number-input{flex:1}.add-button{margin-top:10px}.el-upload__tip{color:#909399;font-size:14px;margin-top:8px}.el-tabs{margin-bottom:20px}