body{
    margin:0;
    background:#f3f3f3;
    font-family:"Microsoft YaHei";
    color:#111;
}

.container{
    max-width:900px;
    margin:auto;
    padding:60px 20px;
    text-align:center;
}

.logo{
    width:120px;
    border-radius:24px;
}

h1{
    font-size:56px;
    margin-top:20px;
    margin-bottom:10px;
}

.subtitle{
    color:#666;
    font-size:20px;
    margin-bottom:40px;
}

.download-btn{
    display:inline-block;
    padding:18px 40px;
    background:#111;
    color:white;
    text-decoration:none;
    border-radius:18px;
    font-size:20px;
    transition:0.2s;
}

.download-btn:hover{
    transform:translateY(-2px);
}

.section{
    margin-top:80px;
}

.steps{
    display:flex;
    gap:20px;
    justify-content:center;
    flex-wrap:wrap;
}

.card{
    background:white;
    padding:30px;
    border-radius:24px;
    width:180px;
    box-shadow:0 4px 20px rgba(0,0,0,0.05);
    font-size:18px;
}

.card span{
    display:block;
    font-size:42px;
    font-weight:bold;
    margin-bottom:10px;
}

.about{
    color:#555;
    max-width:600px;
    margin:auto;
    line-height:1.8;
}