html,
body {
    font-family: Helvetica Neue, PingFang SC, Microsoft YaHei, Helvetica, Arial, sans-serif;
    font-weight: normal;
    font-size: 62.5%;
    /*max-width: 1002px;*/
    margin: 0 auto;
    color: #333;
}

p {
    line-height: 4.3rem;
    font-size: 2.3rem;
}

* {
    margin: 0;
    padding: 0;
}

img {
    width: 100%;
}

.w {
    /*width: 720px;*/
    margin: 0 17%;
}

header {
    height: 8rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

h1,
h2 {
    font-size: 5.2rem;
    line-height: 8rem;
    color: #333;
    margin: 2% auto;
}

h3,
h4 {
    font-size: 3.2rem;
    line-height: 5rem;
    color: #333;
    margin: 1% 0;
}

.context {
    margin: 1% 10%;
}

.part {
    margin-top: 5rem;
}

.part ul li {
    list-style: none;
    margin-left: 1rem;
    font-size: 2.3rem;
    line-height: 4.3rem;
}

.part a {
    color: #409EFF;
}

.part a:hover {
    color: #1989fa;
    text-decoration: none;
}