html {
    font-size: 1em;
    line-height: 1.4;
}

html,
body {
    height: 100%;
    background: #f9f9f9;
}

body {
    overflow-x: hidden;
}

hr {
    display: block;
    height: 1px;
    border: 0;
    border-top: 1px solid #ccc;
    margin: 1em 0;
    padding: 0;
}

li {
    list-style: none;
}

audio,
canvas,
iframe,
img,
svg,
video {
    vertical-align: middle;
}

fieldset {
    border: 0;
    margin: 0;
    padding: 0;
}

textarea {
    resize: vertical;
}

a:hover {
    text-decoration: none;
}

ul {
    padding: 0;
    margin: 0;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    margin: 0;
}

.main{
    position: relative;
    max-width: 1200px;
    width: 90vw;
    margin: 0 auto;
}

.nav{
   display: flex;
   height: 60px;
   align-items: center;
   max-width: 1200px;
   margin: 0 auto;
}
.nav-wrap{
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    background-color: white;
    z-index: 100;
}
.nav ul{
   display: flex;
   justify-content: space-between;
   max-width: 800px;
   min-width: 800px;
}

.nav li a{
   color: #000000;
   text-decoration: none;
   font-size: 16px;
}

.banner{
   display: flex;
   justify-content: center;
   margin-top: 160px;
   position: relative;
}
.banner .action{
   position: absolute;
   bottom: 0;
   height: 70px;
   width: 400px;
   left: 50%;
   transform: translateX(-50%);
   display: flex;
   justify-content: space-between;
}
.banner .action a{
   width: 180px;
   height: 70px;
}

.product{
   margin: 100px 0;
}

.app{
    position: relative;
}

.scene{
   margin: 100px 0;
}

.process{
   margin-bottom: 100px;
   position: relative;
}

.app .action, .process .action{
    position: absolute;
    bottom: 0;
    height: 40px;
    width: 100px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    justify-content: space-between;
}