*{
    box-sizing: border-box;
}

body{
    background-color: #f8f9fd;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    overflow: hidden;
    margin: 0;
}

.container{
    border-radius: 5px;
    box-shadow: 3px 3px 10px rgba(0, 0, 0, 0.2);
    overflow: hidden;
    width: 300px;
}

.title{
    margin: 0;
}

.subtitle{
    display: inline-block;
    margin: 5px 0 20px;
    opacity: 0.8;
}

.header{
    background-color: #3e57db;
    color: #fff;
    padding: 30px 20px;
}

.header input {
    background-color: rgba(0, 0, 0, 0.3);
    border: 0;
    border-radius: 50px;
    color: #fff;
    font-size: 14px;
    padding: 10px 15px;
    width: 100%;
}

.header input:focus{
    outline: none;
}

.user-list {
    background:#fff;
    list-style-type: none;
    margin: 0;
    padding: 0;
    max-height: 400px;
    overflow-y: auto;
}

.user-list li{
    display: flex;
    padding: 20px;
}

.user-list li img{
    border-radius: 50px;
    object-fit: cover;
    height: 50px;
    width: 50px;
}

.user-list .user-info{
    margin-left:10px;
}
.user-list .user-info h4{
    margin:0 0 10px;
}

.user-list .user-info p{
    font-size: 12px;
}

/* 反选伪类 */
.user-list li:not(:last-of-type){
    border-bottom:1px solid #eee ;
}

.user-list li.hide{
    display: none;
}