.tool-container{padding:20px;max-width:850px;margin:0 auto;}
.form-item{margin-bottom:15px;}
label{display:block;margin-bottom:6px;font-weight:500;font-size:14px;}
input,textarea,select{width:100%;padding:10px;border:1px solid #eee;border-radius:6px;box-sizing:border-box;font-size:14px;}
.btn{padding:10px 20px;background:#2d8cf0;color:#fff;border:none;border-radius:6px;cursor:pointer;margin-right:8px;}
.btn:hover{background:#1b76d8;}
.copy-btn{background:#67c23a;}
.clear-btn{background:#f56c6c;}
.opt-row{display:flex;gap:15px;flex-wrap:wrap;}
.opt-row .form-item{flex:1;min-width:140px;}
.result-box{margin-top:20px;padding:15px;border:1px solid #eee;border-radius:6px;}
.tip-text{color:#666;font-size:13px;margin:5px 0;}
.count-info{margin:10px 0;color:#333;}