.about{
    background: var(--c-ivory);
}
/* ===== Intro ===== */
.p-about__intro{
    max-width: 1242px;
    margin: 0 auto;
    display: flex;
    padding-left: 100px;
}
.p-about__intro-text{
    max-width: 600px;
    width: 100%;
    padding: 50px 0 100px 50px;
    border-left: 1px solid var(--c-blue);
    font-family: var(--f-a1gothic);
    font-size: 1rem;
    line-height: 1.875;
    color: var(--c-black);
}
.p-about__intro-photo{
    width: 100%;
    aspect-ratio: 12 / 5;
    overflow: hidden;
}
.p-about__intro-photo img{
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
    display: block;
}
/* ===== Chapter head ===== */
.p-about__chapter{
    max-width: 1242px;
    margin: 0 auto;
    padding-top: 200px;
    scroll-margin-top: 82px;
}
.p-about__chapter-head{
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--c-line);
}
.p-about__chapter-label{
    font-family: var(--f-en);
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--c-blue);
    text-transform: uppercase;
    line-height: 1;
}
.p-about__chapter-ttl{
    font-family: var(--f-serif);
    font-weight: 500;
    font-size: 1.875rem;
    line-height: 1.4;
    color: var(--c-black);
}
.p-about__chapter-body{
    font-family: var(--f-a1gothic);
    font-weight: 400;
    font-size: 1rem;
    line-height: 1.875;
    color: var(--c-black);
}
/* ===== Chapter 01 / 03 diagram rows ===== */
.p-about__row{
    display: flex;
    gap: 100px;
    align-items: flex-start;
    margin-top: 56px;
}
.p-about__row-main{
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 50px;
}
.p-about__row-main--split{
    gap: 0;
}
.p-about__row-diagram{
    flex-shrink: 0;
    width: 570px;
}
.p-about__row-diagram img{
    width: 100%;
    height: auto;
    display: block;
}
.p-about__diagram-caption{
    background: var(--c-white);
    padding: 30px;
    text-align: center;
    font-family: var(--f-a1gothic);
    font-weight: 500;
    font-size: 1rem;
    line-height: 1.875;
    color: var(--c-blue);
    margin-top: 30px;
}
.p-about__ch03-photos{
    display: flex;
    gap: 30px;
}
.p-about__ch03-photo{
    flex: 1;
    aspect-ratio: 1080 / 574;
    overflow: hidden;
}
.p-about__ch03-photo img{
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
/* ===== Chapter 02 timeline ===== */
.p-about__timeline{
    margin-top: 60px;
}
.p-about__timeline-body{
    display: flex;
    flex-direction: column;
    gap: 30px;
}
.p-about__timeline-image{
    width: 100%;
}
.p-about__timeline-image img{
    width: 100%;
    height: auto;
    display: block;
}
.p-about__timeline-labels{
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 12px;
}
.p-about__timeline-label{
    display: flex;
    flex-direction: column;
    gap: 20px;
    align-items: flex-start;
}
.p-about__timeline-tag{
    display: inline-flex;
    align-items: center;
    height: 28px;
    padding: 0 10px;
    background: var(--c-white);
    border: 1px solid var(--c-blue);
    font-family: var(--f-a1gothic);
    font-weight: 500;
    line-height: 1;
    font-size: 0.875rem;
    color: var(--c-blue);
    white-space: nowrap;
}
.p-about__timeline-sub{
    font-family: var(--f-serif);
    font-weight: 500;
    font-size: 1rem;
    line-height: 1.2;
    color: var(--c-blue);
}
.p-about__timeline-desc{
    font-family: var(--f-a1gothic);
    font-weight: 400;
    font-size: 1rem;
    line-height: 1.5;
    color: var(--c-black);
}
/* ===== Links row ===== */
.p-about__links{
    display: flex;
    gap: 30px;
    margin-top: 100px;
}
.p-about__links .c-btn-line{
    width: calc((100% - 30px * 2) / 3);
    max-width: none;
}
.p-about__links--solo{
    margin-top: 50px;
}
.p-about__links--four{
    gap: 20px;
}
.p-about__links--four .c-btn-line{
    width: calc((100% - 20px * 3) / 4);
    max-width: none;
}
.p-about__link-entry{
    position: relative;
    overflow: hidden;
    isolation: isolate;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 70px;
    background: var(--c-yellow);
    font-family: var(--f-en);
    font-weight: 700;
    font-size: 1rem;
    letter-spacing: .1em;
    color: var(--c-blue);
    transition: color .35s var(--ease);
}
.p-about__link-entry::before{
    content: '';
    position: absolute;
    inset: 0;
    z-index: -1;
    background: var(--c-blue);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .35s var(--ease);
}
.p-about__link-entry:is(:hover, :focus-visible){
    color: var(--c-white);
}
.p-about__link-entry:is(:hover, :focus-visible)::before{
    transform: scaleX(1);
}
.p-about__link-entry:focus-visible{
    outline:none;
    box-shadow:inset 0 0 0 2px var(--c-white);
}
/* ===== Company logos ===== */
.p-about__logos-wrap{
    margin-top: 50px;
}
.p-about__logos-label{
    font-family: var(--f-serif);
    font-weight: 500;
    font-size: 1rem;
    line-height: 1.2;
    color: var(--c-blue);
    margin-bottom: 20px;
}
.p-about__logos{
    display: flex;
    gap: 20px;
}
.p-about__logo-card{
    flex: 1;
    min-width: 0;
    background: var(--c-white);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 20px;
    padding: 30px 0;
    min-height: 120px;
}
.p-about__logo-card img{
    width: auto;
    max-height: 30px;
}
.p-about__logo-card.p-about__restar img{
    max-height: 20px;
}
.p-about__logo-name{
    font-family: var(--f-a1gothic);
    font-weight: 500;
    font-size: 1rem;
    line-height: 1;
    color: var(--c-black);
}
/* ===== Purpose ===== */
.p-about__purpose{
    display: none;
}
.p-about__purpose-item{
    background: var(--c-white);
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: 20px;
}
.p-about__purpose-tags{
    display: flex;
    gap: 10px;
}
.p-about__purpose-tag{
    display: inline-flex;
    align-items: center;
    height: 24px;
    padding: 0 10px;
    border: 1px solid var(--c-blue);
    font-family: var(--f-a1gothic);
    font-size: 0.75rem;
    color: var(--c-blue);
    white-space: nowrap;
}
.p-about__purpose-tag--filled{
    background: var(--c-blue);
    color: var(--c-white);
    border: none;
}
.p-about__purpose-text{
    font-family: var(--f-serif);
    font-weight: 500;
    font-size: 1.125rem;
    line-height: 1.44;
    color: var(--c-black);
}
/* ===== Entry ===== */
.p-about__entry{
    position: relative;
    display: flex;
    justify-content: center;
    padding: 100px 0;
    overflow: hidden;
    margin-top: 100px;
}
.p-about__entry-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}
.p-about__entry-bg picture{
    display: block;
    height: 100%;
}
.p-about__entry-bg img{
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.p-about__entry-body{
    position: relative;
    z-index: 1;
    max-width: 1242px;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 50px;
    padding: 0 20px;
}
.p-about__entry-lead{
    font-family: var(--f-serif);
    font-weight: 500;
    font-size: 1.625rem;
    line-height: 1.54;
    color: var(--c-white);
    text-align: center;
}
.p-about__entry-cards{
    width: 100%;
    max-width: 1240px;
    display: flex;
    gap: 10px;
}
.p-about__entry-card{
    flex: 1;
    background: var(--c-white);
    display: flex;
    flex-direction: column;
    gap: 26px;
    padding: 30px 20px;
}
.p-about__entry-tags{
    display: flex;
    gap: 10px;
}
.p-about__entry-tag{
    display: inline-flex;
    align-items: center;
    padding: 0 10px;
    border: 1px solid var(--c-blue);
    font-family: var(--f-a1gothic);
    font-size: 0.875rem;
    color: var(--c-blue);
    white-space: nowrap;
}
.p-about__entry-tag--filled{
    height: 30px;
    background: var(--c-blue);
    color: var(--c-white);
    border: none;
}
.p-about__entry-card-text{
    font-family: var(--f-serif);
    font-weight: 500;
    font-size: 1.25rem;
    line-height: 1.5;
    color: var(--c-black);
}
.p-about__entry-tagline{
    font-family: var(--f-serif);
    font-weight: 500;
    font-size: 1.375rem;
    line-height: 1.818;
    color: var(--c-white);
    text-align: center;
}
@media(min-width:1440px){
    .p-about__intro{
        padding-left: 6.944vw;
    }
    .p-about__intro-text{
        max-width: 41.667vw;
        padding: 3.472vw 0 6.944vw 3.472vw;
        font-size: 1.111vw;
    }
    .p-about__chapter{
        max-width: 86.25vw;
        padding-top: 13.889vw;
    }
    .p-about__chapter-head{
        gap: 1.389vw;
        padding-bottom: 2.083vw;
    }
    .p-about__chapter-label{
        font-size: 0.972vw;
    }
    .p-about__chapter-ttl{
        font-size: 2.083vw;
    }
    .p-about__chapter-body{
        margin-top: 3.472vw;
        font-size: 1.111vw;
    }
    .p-about__row{
        gap: 6.944vw;
        margin-top: 3.889vw;
    }
    .p-about__row-main{
        gap: 3.472vw;
    }
    .p-about__row:has(> .p-about__row-diagram:not(:has(.p-about__diagram-caption))) .p-about__row-main{
        gap: 0;
    }
    .p-about__row-diagram{
        width: 39.583vw;
    }
    .p-about__diagram-caption{
        padding: 2.083vw;
        font-size: 1.111vw;
    }
    .p-about__ch03-photos{
        gap: 2.083vw;
    }
    .p-about__timeline{
        margin-top: 4.167vw;
    }
    .p-about__timeline-body{
        gap: 2.083vw;
    }
    .p-about__timeline-labels{
        gap: 0.833vw;
    }
    .p-about__timeline-label{
        gap: 1.389vw;
    }
    .p-about__timeline-tag{
        height: 1.944vw;
        padding: 0 0.694vw;
        font-size: 0.972vw;
    }
    .p-about__timeline-sub{
        font-size: 1.111vw;
    }
    .p-about__timeline-desc{
        font-size: 1.111vw;
    }
    .p-about__links{
        gap: 2.083vw;
        margin-top: 6.944vw;
    }
    .p-about__link-entry{
        height: 4.861vw;
        font-size: 1.111vw;
    }
    .p-about__logos-wrap{
        margin-top: 3.472vw;
    }
    .p-about__logos-label{
        font-size: 1.111vw;
        margin-bottom: 1.389vw;
    }
    .p-about__logos{
        gap: 1.389vw;
    }
    .p-about__logo-card{
        gap: 1.389vw;
        padding: 2.083vw;
        min-height: 8.333vw;
    }
    .p-about__logo-card img{
        width: auto;
        max-height: 2.083vw;
    }
    .p-about__logo-card.p-about__restar img{
        max-height: 1.389vw;
    }
    .p-about__logo-name{
        font-size: 1.111vw;
    }
    .p-about__entry{
        padding: 6.944vw 0;
    }
    .p-about__entry-body{
        max-width: 86.25vw;
        gap: 3.472vw;
    }
    .p-about__entry-lead{
        font-size: 1.806vw;
    }
    .p-about__entry-cards{
        max-width: 86.111vw;
        gap: 0.694vw;
    }
    .p-about__entry-card{
        gap: 1.806vw;
        padding: 2.083vw 1.389vw;
    }
    .p-about__entry-tags{
        gap: 0.694vw;
    }
    .p-about__entry-tag{
        padding: 0 0.694vw;
        font-size: 0.972vw;
    }
    .p-about__entry-tag--filled{
        height: 2.083vw;
    }
    .p-about__entry-card-text{
        font-size: 1.389vw;
    }
    .p-about__entry-tagline{
        font-size: 1.528vw;
    }
}
@media(min-width:896px) and (max-width:1400px){
    .p-about__intro,
    .p-about__chapter{
        padding-left: 40px;
        padding-right: 40px;
    }
    .p-about__logos {
        gap: 10px;
    }
    .p-about__logo-card img{
        width: auto;
        max-height: 2.083vw;
    }
    .p-about__logo-card.p-about__restar img{
        max-height: 1.389vw;
    }
    .p-about__logo-name {
        font-size: .875rem;
    }
}
@media(min-width:896px) and (max-width:1200px){
    .p-about__row{
        gap: 40px;
    }
    .p-about__row-diagram{
        width: 380px;
    }
    .p-about__entry-cards {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
    }
    .p-about__entry-card {
        background: var(--c-white);
        display: flex;
        flex-direction: column;
        gap: 26px;
        padding: 30px 20px;
    }
}
@media(max-width:1024px){
    .p-about__chapter {
        scroll-margin-top: 68px;
    }
    .p-about__row {
        flex-direction: column;
    }
    .p-about__row-diagram {
        width: 100%;
    }
    .p-about__row-diagram img {
        max-width: 804px;
        margin-inline: auto;
    }
}
@media(max-width:896px){
    .p-about__intro{
        padding: 0 20px;
    }
    .p-about__intro-text{
        max-width: none;
        padding: 30px 0 30px 20px;
        font-size: 0.875rem;
        line-height: 1.71;
    }
    .p-about__intro-photo{
        aspect-ratio: 67 / 45;
        width: 100%;
    }
    .p-about__chapter{
        display: flex;
        flex-direction: column;
        padding: 50px 0 0;
    }
    .p-about__chapter-head{
        gap: 16px;
        padding:0 20px;
        padding-bottom: 30px;
    }
    .p-about__chapter-label{
        font-size: 0.75rem;
    }
    .p-about__chapter-ttl{
        font-size: 1.25rem;
        line-height: 1.5;
    }
    .p-about__chapter-body{
        margin-top: 0;
        font-size: 0.875rem;
        padding: 0 20px;
    }
    .p-about__row{
        align-items: stretch;
        gap: 50px;
        margin-top: 50px;
    }
    .p-about__row-diagram{
        min-width: 0;
        padding: 0;
        text-align: center;
    }
    .p-about__row-main--split .p-about__row-diagram{
        padding: 50px 0;
    }
    .p-about__diagram-caption{
        width: calc(100% - 40px);
        padding: 20px 0;
        font-size: 0.875rem;
        line-height: 1.71;
        margin: 0 auto;
        margin-top: 42px;
    }
    .p-about__ch03-photos{
        padding: 0 20px;
        gap: 12px;
    }
    .p-about__timeline{
        padding: 0 20px;
        margin-top: 50px;
    }
    .p-about__timeline-body{
        flex-direction: row;
        align-items: stretch;
        justify-content: center;
        gap: 20px;
    }
    .p-about__timeline-image{
        width: auto;
        flex-shrink: 0;
    }
    .p-about__timeline-image img{
        width: 12.935vw;
        height: auto;
    }
    .p-about__timeline-labels{
        grid-template-columns: 1fr;
        gap: 0;
    }
    .p-about__timeline-label{
        padding: 1.99vw 0;
        gap: 1.99vw;
    }
    .p-about__timeline-tag{
        height: auto;
        font-size: 3.483vw;
        padding: 3px 2.488vw 2px;
    }
    .p-about__timeline-sub{
        font-size: 3.98vw;
    }
    .p-about__timeline-desc{
        font-size: 3.483vw;
    }
    .p-about__links{
        flex-direction: column;
        gap: 20px;
        margin-top: 50px;
        padding: 0 20px;
    }
    .p-about__links .c-btn-line {
        width:100%;
    }
    .p-about__links--solo{
        margin-top: 50px;
    }
    .p-about__links--four{
        gap: 20px;
    }
    .p-about__links--four .c-btn-line{
        width: 100%;
    }
    .p-about__link-entry{
        flex: none;
        height: 62px;
        font-size: 1rem;
    }
    .p-about__logos-wrap{
        margin-top: 50px;
        padding: 0 20px;
    }
    .p-about__logos{
        flex-direction: column;
        gap: 20px;
    }
    .p-about__logo-card{
        padding: 19px;
        min-height: 0;
        gap: 16px;
    }
    .p-about__logo-card img{
        width: auto;
        max-height: 30px;
    }
    .p-about__logo-card.p-about__restar img{
        max-height: 20px;
    }
    .p-about__purpose{
        display: flex;
        flex-direction: column;
        gap: 20px;
        margin-top: 50px;
        padding: 0 20px;
    }
    .p-about__purpose-item{
        gap: 14px;
        padding: 18px 20px;
    }
    .p-about__purpose-tag{
        height: 24px;
        padding: 0 10px;
        font-size: 0.75rem;
        line-height: 1;
    }
    .p-about__purpose-text{
        font-size: 1.125rem;
        line-height: 1.44;
    }
    .p-about__entry{
        margin-top: 50px;
        padding: 70px 0;
    }
    .p-about__entry-body{
        gap: 40px;
        padding: 0;
    }
    .p-about__entry-lead{
        font-size: 1.625rem;
        line-height: 1.53;
    }
    .p-about__entry-cards{
        display: none;
    }
    .p-about__entry-tagline{
        font-size: 1.375rem;
        line-height: 1.8;
    }
}
@media(max-width:540px){
    .p-about__timeline-desc {
        font-size: 3.2vw;
    }
}
@media(max-width:375px){
    .p-about__chapter-ttl {
        font-size: 4.8vw;
    }
    .p-about__diagram-caption {
        padding: 5.333vw 0;
        font-size: 3.467vw;
    }
}