.tool-container{max-width:1200px;margin:0 auto;padding:20px;box-sizing:border-box;}
.tool-box{background:#fff;padding:25px;}
.title-h3{font-size:18px;font-weight:600;margin-bottom:12px;}
.row-item{margin-bottom:20px;}
.flex-row{display:flex;gap:15px;flex-wrap:wrap;}
.flex-item{flex:1;min-width:220px;}
input,select,textarea{width:100%;box-sizing:border-box;border:1px solid #eee;border-radius:8px;padding:12px;font-size:14px;outline:none;background:#fff;}
textarea{min-height:120px;resize:none;}
.check-item{display:inline-flex;align-items:center;margin-right:15px;margin-bottom:8px;cursor:pointer;}
.check-item input{
    width:auto;margin-right:5px;
    -webkit-appearance: checkbox !important;
    -moz-appearance: checkbox !important;
    appearance: checkbox !important;
}
.btn-group{display:flex;gap:12px;flex-wrap:wrap;margin-top:10px;}
.btn{padding:10px 24px;border-radius:6px;border:none;cursor:pointer;font-size:14px;transition:0.2s;}
.btn-sub{background:#fe2c55;color:#fff;}
.btn-short{background:#4080ff;color:#fff;}
.btn-copy{background:#22b573;color:#fff;}
.btn-reset{background:#f5f5f5;color:#333;}
.result-box{margin-top:25px;background:#fafafa;padding:20px;border-radius:8px;line-height:1.8;white-space:pre-wrap;max-height:500px;overflow:auto;}
.empty-tip{color:#999;text-align:center;padding:30px 0;}
.warn-tip{margin-top:10px;padding:10px;background:#fff7e6;border-radius:6px;color:#e66a00;font-size:13px;}
@media (max-width:768px){
    .tool-container{padding:10px;}
    .flex-row{flex-direction:column;gap:10px;}
}