*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;
}

:root{
    --main:#102B52;
    --gold:#F5A623;
    --bg:#F3F6FB;
    --text:#243650;
    --gray:#8A95A8;
}

body{
    background:linear-gradient(145deg,#f5f7fc,#e9eef7);
    min-height:100vh;
    display:flex;
    justify-content:center;
    align-items:center;
    padding:16px;
}

.container{
    width:100%;
    max-width:420px;
}

.header{
    text-align:center;
    margin-bottom:20px;
}

.header h1{
    font-size:28px;
    color:var(--main);
    font-weight:700;
}

.header p{
    margin-top:6px;
    color:var(--gray);
    font-size:13px;
}

.card{
    background:#fff;
    border-radius:24px;
    padding:22px;
    box-shadow:0 15px 45px rgba(0,0,0,.08);
}

label{
    display:block;
    margin-top:18px;
    margin-bottom:8px;
    font-size:14px;
    color:var(--text);
    font-weight:600;
}

input[type=tel]{
    width:100%;
    height:48px;
    border:1px solid #dfe6ef;
    border-radius:14px;
    padding:0 15px;
    font-size:15px;
}

input[type=tel]:focus{
    outline:none;
    border-color:var(--gold);
}

.amounts{
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:12px;
}

.amount{
    height:46px;
    border-radius:14px;
    border:1px solid #dfe6ef;
    background:#fafcff;
    font-size:15px;
    font-weight:600;
    cursor:pointer;
}

.amount.active{
    background:#fff8eb;
    border-color:var(--gold);
    color:#b57912;
}

.pay-box{
    display:flex;
    gap:20px;
    margin-top:10px;
}

.pay-box label{
    margin:0;
    font-weight:500;
}

#submitBtn{
    width:100%;
    height:50px;
    margin-top:28px;
    border:none;
    border-radius:28px;
    background:linear-gradient(135deg,#f6b83d,#f5a623);
    color:#102B52;
    font-size:16px;
    font-weight:700;
    cursor:pointer;
}

#submitBtn:active{
    transform:scale(.98);
}