:root {
    --green: #005944;
}
html, body {
    margin: 0;
    padding: 0;
    font-family: 'Noto Sans JP', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
}
h1, h2, h3 {
    color: var(--green);
}
h1 {
    margin: 2.5em 0;
    font-size: 30px;
    font-weight: 500;
    text-align: center;
}
p {
    color: #303131;
}
header {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 80px;
    border-bottom: 1px solid #b0c0b9;
}
header .logo {
    width: 200px;
    height: auto;
}
main {
    margin: 0;
    padding: 0;
}
.research-achievements {
    width: 1000px;
    margin: 0 auto;
    padding: 0;
    list-style: none;
    border-top: 1px solid #b0c0b9;
    border-bottom: 1px solid #b0c0b9;
}
.research-achievements > li + li {
    border-top: 1px solid #b0c0b9;
}
.research-achievements > li a {
    display: flex;
    justify-content: flex-start;
    align-items: stretch;
    gap: 140px;
    padding: 60px 20px;
    transition: background-color 0.3s ease;
}
.research-achievements > li a:hover {
    background-color: #f5f5f5;
}
.research-achievements .research-image {
    width: 235px;
    height: 155px;
    object-fit: cover;
}
.research-achievements .description {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;
}
.research-achievements .description .copy {
    font-family: 'Noto Serif JP', serif;
    font-size: 15px;
}
.research-achievements .description h3 {
    margin: 1em 0 auto;
    font-size: 21px;
    font-weight: 400;
    line-height: 1.7;
}
.research-achievements .description .read-more {
    margin-top: 3em;
    font-family: 'Noto Serif JP', serif;
    font-size: 13px;
    font-weight: 700;
}
.copyright {
    display: block;
    margin: 200px auto 1.5em;
    color: var(--green);
    font-size: 18px;
    text-align: center;
}
@media screen and (max-width: 959px) {
    .pc-only {
        display: none;
    }
    h1 {
        font-size: 5vw;
    }
    header {
        height: 17vw;
    }
    header .logo {
        display: block;
        width: 40vw;
    }
    .research-achievements {
        width: 80vw;
    }
    .research-achievements > li a {
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        gap: 5vw;
        padding: 10vw 0;
    }
    .research-achievements > li a:hover {
        background-color: #f5f5f5;
    }
    .research-achievements .research-image {
        width: 48vw;
        height: 32vw;
    }
    .research-achievements .description {
        align-items: center;
    }
    .research-achievements .description .copy {
        font-size: 3.2vw;
    }
    .research-achievements .description h3 {
        margin: 1em 0 1.7em;
        font-size: 4.2vw;
        line-height: 1.7;
        text-align: center;
    }
    .research-achievements .description .read-more {
        margin-top: 0;
        font-size: 3.2vw;
    }
    .copyright {
        margin-top: 25vw;
        font-size: 2.7vw;
    }
}
@media screen and (min-width: 960px) {
    .sp-only {
        display: none;
    }
}