.top-title{
    background: url(../images/graphene-top.png) no-repeat 50% 50%;
    background-size: 100% 100%;
    height: 300px;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.top-title h3{
    font-size: 32px;
    color: #ffffff;
    font-weight: 700;
}
.tab-title{
    font-size: 20px;
    color: var(--color-blue);
    text-align: center;
    margin-bottom: 10px;
}
h4{
    font-weight: bold;
    font-size: 30px;
    text-align: center;
    margin-bottom: 45px;
}
/* 그래핀 */
.graphene-content{
    margin-top: 70px;
}
.graphene-content h5{
    font-weight: 700;
    font-size: 20px;
}
.graphene-content h5 span{
    display: block;
    width: 30px;
    height: 3px;
    margin-top: 5px;
}
.graphene-content .box1{
    max-width: 1250px;
    margin: 80px auto 0;
    padding: 0 30px;
    display: flex;
    align-items: center;
}
.graphene-content .box1 h5 span{
    background-color: var(--color-green);
}
.graphene-content .box1 .img{
    width: 42%;
    margin-right: 40px;
}
.graphene-content .box1 .text{
    width: 58%;
}
.graphene-content .box1 .text p{
    margin-top: 30px;
    line-height: 1.8;
}
.box2{
    margin-top: 120px;
    padding: 70px 0 100px;
    background: url(../images/graphene-img4-bg.png) no-repeat 0 0;
    background-size: cover;
}
.box2 h5{
    text-align: center;
}
.box2 h5 span{
    background: #31d5f6;
    margin: 5px auto 0;
}
.box2  .img{
    margin: 60px 0;
}
.box2 .img .pc{display: block;}
.box2 .img .mobile{display: none;}
.box2 .text{
    padding: 0 30px;
    text-align: center;
    line-height: 1.8;
}
.box2 .text p:first-of-type{
    margin-bottom: 30px;
}
.box3{
    max-width: 1250px;
    margin: 0 auto;
    padding: 80px 30px 30px;
    text-align: center;
}
.box3 h5 span{
    margin: 5px auto 0;
    background-color: #FFAB03;
}
.box3 .img{
    margin-top: 50px;
}
.box4{
    background-color: #f6f6f6;
    padding: 70px 30px;
}
.box4 .img{
    max-width: 650px;
    margin: 0 auto;
}
.box4 p{
    text-align: center;
    line-height:  1.8;
    width: 54%;
    margin: 40px auto 0;
}
.box5{
    max-width: 1250px;
    margin: 0 auto;
    padding: 120px 30px;
    text-align: center;
}
.box5 h5 span{
    background-color: #9d31ef;
    margin: 5px auto 0;
}
.box5 p{
    line-height: 1.8;
    margin: 40px 0 80px;
}
.box6{
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
}
.box6 .item{
    width: 24%;
}
.box6 .item .img{
    border: 1px solid var(--border-color);
    height: auto;
    line-height: 0;
}
.box6 .item .img img{
    height: 100%;
}
.box6 p{
    margin: 20px 0 0;
}
.box7{background-color: #F6F6F6;}
.box7 > div{
    max-width: 1250px;
    margin: 0 auto;
    padding: 120px 30px;
    text-align: center;
}
.box7 h5{
    font-weight: 700;
    font-size: 20px;
}
.box7 h5 span{
    margin: 5px auto 0;
    background-color: #ff2176;
}
.box7 p{
    margin: 25px 0 100px;
}
@media screen and (max-width: 965px) {
    .box4 p{width: 65%;}
}
@media screen and (max-width: 768px) {
    h4{margin: 40px auto; font-size: 26px; min-width: 150px;}
    .top-title{height: 260px;}
    .graphene-content .box1{flex-direction: column; margin: 50px auto 0;}
    .graphene-content .box1 .img{margin-right: 0; width: 80%;}
    .graphene-content .box1 .text{width: 100%; margin-top: 20px;}
    .graphene-content h5{text-align: center;}
    .graphene-content h5 span{margin: 3px auto 0;}
    .box3{padding: 35px 30px;}
    .box5{padding: 35px 30px 100px;}
    .box2{margin-top: 85px;}
    .box2 .img .pc{display: none;}
    .box2 .img .mobile{display: block; width: 90%; margin: 0 auto;}

    .box7 > div{padding: 60px 30px;}
    .box7 p{margin: 20px 0 60px; line-height: 1.5;}
}
@media screen and (max-width: 560px) {
    h4{font-size: 20px; margin: 20px auto;}
}
@media screen and (max-width: 500px) {
    .top-title{height: 200px;}
    .top-title h3{font-size: 28px;}
    .box4 p{width: 90%;}

    .box6{flex-wrap: wrap;}
    .box6 .item{width: 48%; margin-bottom: 10px;}
    .box6 p{font-size: 12px; margin: 5px 0 0;}
}