* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
.tool-container {
    max-width:800px;
    margin:40px auto;
    padding:0 15px;
}
.card-box {
    padding:32px;
}
.title-main {
    text-align:center;
    font-size:24px;
    color:#222;
    margin-bottom:10px;
}
.desc-tip {
    text-align:center;
    color:#666;
    font-size:14px;
    margin-bottom:30px;
}
.line-item{
    display:flex;
    align-items:center;
    gap:10px;
    margin-bottom:20px;
}
.line-item label{
    width:110px;
    flex-shrink:0;
    font-size:15px;
    color:#333;
}
.line-item input{
    flex:1;
    height:42px;
    border:1px solid #ddd;
    border-radius:8px;
    padding:0 14px;
    font-size:15px;
}
.line-item input:focus{
    outline:none;
    border-color:#3b82f6;
    box-shadow:0 0 0 3px rgba(59,130,246,0.12);
}
.line-item button{
    height:38px;
    padding:0 14px;
    font-size:13px;
    white-space:nowrap;
    border:none;
    border-radius:6px;
    cursor:pointer;
}
.btn-convert{
    background:#3b82f6;
    color:#fff;
}
.btn-convert:hover{
    background:#2563eb;
}
.btn-copy{
    background:#94a3b8;
    color:#fff;
}
.btn-copy:hover{
    background:#64748b;
}
.btn-clear-wrap{
    text-align:center;
    margin:26px 0;
}
#clearAll{
    padding:9px 26px;
    font-size:14px;
    background:#eee;
    border:none;
    border-radius:6px;
    cursor:pointer;
}
#clearAll:hover{
    background:#e2e2e2;
}
.info-box {
    margin-top:28px;
    padding:18px;
    background:#f0f7ff;
    border-radius:10px;
}
.info-tit {
    font-weight:600;
    color:#2563eb;
    margin-bottom:8px;
}
.info-text {
    font-size:14px;
    color:#444;
    line-height:1.6;
}