*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

body{
    font-family:Arial,sans-serif;
    background:#eef2f8;
    height:100vh;
    display:flex;
    justify-content:center;
    align-items:center;
}

.card{
    width:92%;
    max-width:420px;
    background:#fff;
    border-radius:18px;
    overflow:hidden;
    box-shadow:0 12px 35px rgba(0,0,0,.12);
}

.banner{
    width:100%;
    height:180px;
}

.banner img{
    width:100%;
    height:100%;
    object-fit:cover;
    display:block;
}

.content{
    padding:22px;
}

h2{
    text-align:center;
    font-size:20px;
    margin-bottom:6px;
}

p{
    text-align:center;
    color:#666;
    font-size:14px;
    margin-bottom:18px;
}

.track{
    height:56px;
    background:#edf1f6;
    border-radius:30px;
    position:relative;
    overflow:hidden;
    user-select:none;
}

.fill{
    position:absolute;
    left:0;
    top:0;
    height:100%;
    width:0;
    background:linear-gradient(90deg,#4a7cff,#6aa6ff);
}

.slider{
    width:56px;
    height:56px;
    background:#4a7cff;
    border-radius:50%;
    position:absolute;
    left:0;
    top:0;
    display:flex;
    align-items:center;
    justify-content:center;
    color:#fff;
    font-size:22px;
    cursor:pointer;
    touch-action:none;
}

.text{
    position:absolute;
    width:100%;
    height:100%;
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:14px;
    color:#666;
    pointer-events:none;
}

.success{
    margin-top:12px;
    text-align:center;
    color:#16a34a;
    font-size:14px;
    display:none;
}