#content{
    padding-top: 6.8rem;
    background: #F4F8FE;
}
.block{
    padding: 4rem;
    width: 800px;
    max-width: 100%;
    margin: 0 auto;
    background: #fff;
}
h4,h5{
    text-align: center;
}
#content img{
    display: block;
    margin: 3rem auto;
    max-width: 100%;
}
h4{
    padding-bottom: 2rem;
    font-size: 2.8rem;
    font-weight: 600;
    color: #343A40;
    line-height: 4.5rem;
    letter-spacing: 0.1rem;
}

h5 {
    font-size: 1.6rem;
    font-weight: 600;
    color: #343A40;
    line-height: 3.5rem;
    letter-spacing: 0.1rem;
}

p,li {
    font-size: 1.4rem;
    font-weight: 400;
    color: #70757D;
    line-height: 2.4rem;
}

/* 移动端（平板，小于等于 768px） */
@media (max-width: 768px) { 
    .block{
        padding: 2rem;
    }
    h4{
        font-size: 2.2rem;
        line-height: 3.8rem;
    }
}