*{box-sizing:border-box;margin:0;padding:0;}
body{
    font-family:"Microsoft YaHei",sans-serif;
    background:#f5f7fa;
    display:flex;
    flex-direction:column;
    align-items:center;
    padding:40px 20px;
}
h1{
    color:#333;
    margin-bottom:30px;
}
.container{
    background:#fff;
    padding:30px;
    border-radius:12px;
    box-shadow:0 4px 12px rgba(0,0,0,0.1);
    width:100%;
    max-width:420px;
    text-align:center;
}
.input-wrap{
    display:flex;
    gap:10px;
    margin-bottom:20px;
}
#text{
    flex:1;
    padding:12px 15px;
    border:1px solid #ddd;
    border-radius:8px;
    font-size:16px;
    outline:none;
}
#text:focus{border-color:#007bff;}
button{
    padding:12px 20px;
    border:none;
    border-radius:8px;
    background:#007bff;
    color:#fff;
    font-size:16px;
    cursor:pointer;
    transition:background 0.2s;
}
button:hover{background:#0056b3;}
#clearBtn{background:#6c757d;}
#clearBtn:hover{background:#5a6268;}
#qrcode{
    margin:20px auto;
    width:200px;
    height:200px;
}