body {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    background-color: #f5f6f7;
    margin: 0;
    zoom: 90%;
}

h1 {
    color: #005BAC;
    font-size: 40px;
}

h2 {
    color: #005BAC;
    font-size: 30px;
}

h3 {
    color: #000;
    font-size: 25px;
}

h4 {
    color: #005BAC;
    font-size: 50px;
    margin: 30px 0;
}

a {
    color: #fff;
}

.body {
    background-color: #fff;
    width: 1150px;

}

nav {
    padding: 10px 25px;
    border-bottom: 1px dashed #909399;
}

nav img {
    height: 70px;
}

.head {
    height: 320px;
    margin-top: 80px;
    background-image: url('../img/header.png');
    background-repeat: no-repeat;
    background-size: 100%;
}

.png {
    height: 200px;
    background-color: #005BAC;
    padding: 0 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    align-content: center;
}

.png img {
    height: 80%;
}

.address {
    width: 500px;
    float: right;
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.address div {
    width: 500px;
}

.epidemic_text_div {
    height: 290px;
    border-bottom: 1px dashed #005BAC;
}

section {
    padding: 50px;
}

.introduce {
    padding: 20px 50px;
}

section p {
    text-indent: 30px;
    line-height: 35px;
}

.epidemic {
    margin: 150px 0 150px;
    display: grid;
    grid-template-columns: 50% 50%;
    grid-column-gap: 60px;
}

.epidemic_text {
    padding: 0 20px;
}

.epidemic_text p {
    padding-left: 10px;
}

footer {
    height: 50px;
    background-color: #005BAC;
    text-align: center;
    line-height: 50px;
    color: #fff;
}