#presentaion {
    padding-bottom: 140px;
}
#presentaion .block {
    max-width: 1200px;
    width: 85%;
    margin: auto;
}
#presentaion .block .intro {
    margin-bottom: 40px;
    line-height: 2;
}
#presentaion .block .hash {
    display: flex;
    justify-content: flex-start;
    flex-wrap: wrap;
    margin-bottom: 40px;
}
#presentaion .block .hash li {
    margin-right: 20px;
    border: 2px solid #151A8C;
    background-color: #fff;
    padding: 5px 10px;
    font-size: 1.4rem;
}
#presentaion .block .hash li:hover {
    background-color: #151A8C;
}
#presentaion .block .hash li:hover a {
    color: #fff;
    opacity: 1;
}
#presentaion .block .hash li a {
    color: #151A8C;
    font-weight: bold;
}
#presentaion .block .presen-posts {
    width: 100%;
    display: flex;
    flex-wrap: wrap;
}
#presentaion .block .presen-posts .item {
    width: 30%;
    margin-right: 5%;
    margin-bottom: 80px;
}
#presentaion .block .presen-posts .item:nth-child(3n) {
    margin-right: 0;
}
#presentaion .block .presen-posts .item .date {
    margin-bottom: 10px;
    font-weight: 600;
}
#presentaion .block .presen-posts .item h3 {
    color: #151A8C;
    font-size: 2.4rem;
    margin-bottom: 15px;
}
#presentaion .block .presen-posts .item .tag ul {
    display: flex;
    flex-wrap: wrap;
}
#presentaion .block .presen-posts .item .tag li {
    background-color: #151A8C;
    color: #fff;
    text-align: center;
    padding: 5px 10px;
    font-size: 1.2rem;
    margin-bottom: 5px;
    margin-right: 5px;
}
#presentaion .block .presen-posts .item img {
    display: block;
    width: 100%;
    aspect-ratio: 67 / 53;
    object-fit: cover;
    margin-bottom: 15px;
}
#presentaion .block .presen-posts .item .overview {
    line-height: 1.8;
}

@media screen and (max-width: 764px) {
    #presentaion {
        padding-bottom: 60px;
    }
    #presentaion .block .hash li {
        font-size: 1.0rem;
        margin-bottom: 5px;
        margin-right: 10px;
    }
    #presentaion .block .presen-posts .item {
        width: 100%;
        margin-right: 0%;
        margin-bottom: 40px;
    }
}