.tool-container{max-width:1200px;margin:0 auto;padding:20px;box-sizing:border-box;}
.tool-main{background:#fff;padding:25px;}
.title-h3{font-size:18px;font-weight:600;margin-bottom:12px;}
.item-row{margin-bottom:20px;}
.flex-box{display:flex;gap:15px;flex-wrap:wrap;}
.flex-item{flex:1;min-width:220px;}
select{width:100%;box-sizing:border-box;border:1px solid #eee;border-radius:8px;padding:12px;font-size:14px;outline:none;background:#fff;}
.btn-group{display:flex;gap:12px;flex-wrap:wrap;margin-top:10px;}
.btn{padding:10px 22px;border-radius:6px;border:none;cursor:pointer;font-size:14px;}
.btn-make{background:#fe2c55;color:#fff;}
.btn-copy{background:#22b573;color:#fff;}
.btn-refresh{background:#f5f5f5;color:#333;}
.btn-random{background:#6b7280;color:#fff;}
.result-box{margin-top:25px;background:#fafafa;padding:20px;border-radius:8px;line-height:1.8;max-height:480px;overflow:auto;white-space:pre-wrap;}
.empty-tip{color:#999;text-align:center;padding:30px 0;}
.tip-text{margin-top:10px;padding:10px;background:#f0f7ff;border-radius:6px;font-size:13px;color:#366ed8;}
@media (max-width:768px){
    .tool-container{padding:10px;}
    .flex-box{flex-direction:column;gap:10px;}
}