html, body{
    margin: 0;
    padding: 0;
    font-size: 4vw;
}
.clearfix:after {
    content: '';
    display: block;
    float: none;
    clear: both;
}
header img{
    display: block;
    width: 100%;
    margin: 0 auto;
}
nav {
    font-size: 1rem;
    background: #8bd6e9 url(../images/m_lead.png) right bottom no-repeat;
    color: #fff;
    padding: 1.5vw 15vw 1.5vw 1.5vw;
    background-size: contain;
}
nav a {
    text-align: center;
    color: #00654b;
    padding: 1.5vw 2.5vw;
    text-decoration: none;
    display: inline-block;
}
.video {
    margin: 1em;
}
.video video {
    width: 100%;
    display: block;
    margin: 0 auto; 
}
.summary {
    line-height: 1.8;
    margin: 1rem;
}
.summary .u-copy {
    color: #009b4c;
    font-weight: 600;
    margin-top: .5rem;
    font-size: 1rem;
}
.summary .u-txt {
    font-size: 0.85rem;
}
.summary .u-txt .u-company {
	display: inline-block;
	padding-right: 1rem;
}
footer{
    font-size: .85rem;
    text-align: center;
    padding: 1em;
    background: #009b4c;
    color: #fff;
    margin-top: 2rem;
}

.nav-head {
    margin: .8em 0 .4em;
    font-size: 5.5vw;
    display: block;
    margin-left: .8em;
    border-left: 4px solid #000;
    padding-left: .5em;
    line-height: 1;
    color: #000;
    font-weight: 600;
}
.mb-2 {
    margin-bottom: 2em;
}

.list li{
    margin: 0 .8em ;
    border-bottom: 1px solid #dfdfdf;
}
.list a{
    background: #fff;
    display: block;
    padding: .8em 0;
    position: relative;
}
.list li:last-of-type {
    border-bottom: 0;
}
.list li a:visited {
    color: #333;
    text-decoration: none;
}
.list li a:hover {
    color: #333;
    text-decoration: none;
}

.art-main{
    display: flex;
    align-items: flex-start;
}
.art-img{
    display: inline-block;
    width: 35%;
    margin-right: 3vw;
}
.art-txt{
    font-size: 3.5vw;
    color: #858585;
}
.art-title{
    font-size: 4.5vw;
    margin: 0px 0 1vw;
    color: #000;
}
.more {
    display: block;
    margin: .8em;
    text-align: center;
    background: #f7f7f7;
    padding: 2vw 0;
    color: #333;
}