/*header*/
.header_bottom::after{
    background-image: linear-gradient(90deg ,transparent 50% ,rgba(8, 13, 57,0.5) 80% ,rgba(0,0,0,0.8) 100%), url(../../../images/content/casestudy/background.webp);
    background-position: center bottom;
}
.header_bottom{
    background-image: linear-gradient(90deg ,rgba(200,200,200,0.7) 0% ,rgba(200, 200, 200, 0.7) 100%), url(../../../images/content/casestudy/background.webp);
    background-position: center bottom;
}

/* content-list */
.content_list {
    max-width: 1350px;
    width: 90%;
    display: flex;
    flex-wrap: wrap;
    flex-direction: row;
    justify-content: flex-start;
    align-items: center;
    gap: 1em;
    margin: 0 auto;
    padding: 10em 0;
}
.content_item__link {
    width: calc(100% / 3 - 2em / 3);
    box-sizing: border-box;
    transition: all 0.3s;
}
.content_item__link:hover {
    opacity: 0.6;
}
.content_item__link img {
    width: 100%;
}

/*--------------------------------------------
max-width 810
--------------------------------------------*/
@media (max-width: 810px) {
    .content_list {
        padding: 5em 0;
    }
    .content_item__link {
        width: calc(100% / 2 - 1em);
    }
}