.about-shell {
    width: min(1280px, calc(100% - 2rem));
    min-height: 100vh;
    margin: 0 auto;
    padding: 1rem 0 1.5rem;
}

.about-header {
    position: sticky;
    top: 0.75rem;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1rem;
    min-height: 82px;
    padding: 1rem 1.2rem;
    border: 1px solid rgba(159, 177, 195, 0.78);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.94);
    box-shadow: var(--shadow);
    backdrop-filter: blur(15px);
}

.about-brand {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    min-width: 0;
}

.about-logo {
    width: 82px;
    height: 82px;
    object-fit: contain;
    flex: 0 0 auto;
    transform: scale(1.1);
    transform-origin: left center;
}

.about-brand span {
    display: grid;
    gap: 0.08rem;
}

.about-brand small {
    color: var(--ink-soft);
    font-size: 0.74rem;
    letter-spacing: 0.09em;
    text-transform: none;
    white-space: nowrap;
}

.about-brand strong {
    font-size: 1.06rem;
    white-space: nowrap;
}

.about-nav,
.about-page-footer nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    min-width: 0;
    flex-wrap: wrap;
    gap: 0.55rem 0.85rem;
}

.about-nav > a:not(.button),
.about-page-footer a {
    color: var(--brand-strong);
    font-weight: 650;
}

.about-hero {
    display: grid;
    grid-template-columns: minmax(300px, 0.82fr) minmax(0, 1.18fr);
    gap: clamp(1.5rem, 4vw, 4rem);
    align-items: center;
    min-height: min(710px, calc(100vh - 7.5rem));
    padding: clamp(1rem, 3.5vw, 3rem);
    border: 1px solid var(--line);
    border-radius: 24px;
    background:
        linear-gradient(120deg, rgba(225, 238, 244, 0.82), rgba(255, 255, 255, 0.96) 66%),
        #fff;
    box-shadow: var(--shadow);
}

.about-portrait {
    margin: 0;
}

.about-portrait img {
    display: block;
    width: 100%;
    aspect-ratio: 4 / 4.65;
    object-fit: cover;
    object-position: 52% center;
    border-radius: 20px;
    box-shadow: 0 22px 48px rgba(22, 33, 43, 0.18);
}

.about-portrait figcaption {
    margin: 0.48rem 0.15rem 0;
    color: var(--ink-soft);
    font-size: 0.7rem;
}

.about-intro h1 {
    margin: 0.2rem 0 1rem;
    font-size: clamp(2.25rem, 5vw, 4.8rem);
    line-height: 0.98;
    letter-spacing: -0.045em;
}

.about-intro > p:not(.eyebrow) {
    max-width: 71ch;
    margin-top: 0.72rem;
    color: #43515e;
    font-size: clamp(0.95rem, 1.35vw, 1.08rem);
    line-height: 1.62;
}

.about-intro .about-lede {
    color: var(--ink);
    font-size: clamp(1.12rem, 1.85vw, 1.42rem);
    line-height: 1.48;
}

.about-callout {
    display: grid;
    gap: 0.22rem;
    margin-top: 1.1rem;
    padding: 0.85rem 1rem;
    border-left: 4px solid var(--brand);
    border-radius: 0 12px 12px 0;
    background: rgba(32, 94, 122, 0.08);
    line-height: 1.48;
}

.about-callout span {
    color: #43515e;
}

.about-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
    margin-top: 1.1rem;
}

.about-content-grid {
    display: grid;
    grid-template-columns: minmax(320px, 1.18fr) minmax(280px, 0.82fr);
    gap: 1rem;
    margin-top: 1rem;
}

.about-card,
.about-license {
    scroll-margin-top: 6.5rem;
    border: 1px solid var(--line);
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow);
}

.about-content-grid > .about-license {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-rows: 1fr auto;
    align-items: start;
    gap: 1rem;
    margin-top: 0;
    padding: clamp(1.2rem, 2.5vw, 2rem);
}

.about-content-grid > .about-license > div {
    grid-column: 1 / -1;
    grid-row: 1;
}

.about-content-grid > .about-license > a {
    grid-column: 2;
    grid-row: 2;
    align-self: end;
    justify-self: end;
    margin-top: 1rem;
}

.about-content-grid > .about-license p:not(.eyebrow) {
    line-height: 1.58;
}

.about-anchor {
    display: block;
    position: relative;
    top: -6.5rem;
    height: 0;
    visibility: hidden;
}

.about-card {
    padding: clamp(1.2rem, 2.5vw, 2rem);
}

.about-card h2,
.about-license h2 {
    margin: 0.18rem 0 1rem;
    font-size: clamp(1.42rem, 2.3vw, 2rem);
}

.about-card h3 {
    margin: 1.15rem 0 0.34rem;
    font-size: 0.9rem;
}

.about-card address,
.about-card p {
    font-style: normal;
    line-height: 1.58;
}

.about-contact-list {
    display: grid;
    gap: 0.6rem;
    margin-top: 1.1rem;
}

.about-contact-list > div {
    display: grid;
    grid-template-columns: 74px minmax(0, 1fr);
    gap: 0.8rem;
    padding-top: 0.58rem;
    border-top: 1px solid var(--line);
}

.about-contact-list dt {
    color: var(--ink-soft);
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
}

.about-contact-list dd {
    min-width: 0;
    overflow-wrap: anywhere;
}

.about-card a,
.about-license a {
    color: var(--brand);
    text-decoration: underline;
    text-decoration-color: rgba(32, 94, 122, 0.34);
    text-underline-offset: 0.18em;
}

.about-affiliation,
.about-legal-note {
    margin-top: 1.2rem;
    padding-top: 0.2rem;
    border-top: 1px solid var(--line);
}

.about-imprint > h3:first-of-type {
    margin-top: 0;
}

.about-license {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 1.2rem;
    margin-top: 1rem;
    padding: 1.1rem 1.3rem;
}

.about-license p:not(.eyebrow) {
    max-width: 82ch;
    color: var(--ink-soft);
    line-height: 1.52;
}

.about-license img {
    display: block;
    width: 154px;
    height: auto;
}

.about-page-footer {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 1rem;
    padding: 0.75rem 0.3rem 0;
    color: var(--ink-soft);
    font-size: 0.8rem;
}

@media (max-width: 850px) {
    .about-header,
    .about-page-footer {
        position: static;
        align-items: flex-start;
        flex-direction: column;
    }

    .about-hero,
    .about-content-grid {
        grid-template-columns: 1fr;
    }

    .about-hero {
        min-height: auto;
    }

    .about-portrait {
        width: min(100%, 480px);
        margin: 0 auto;
    }
}

@media (max-width: 520px) {
    .about-shell {
        width: min(100% - 1rem, 1280px);
        padding-top: 0.5rem;
    }

    .about-nav {
        width: 100%;
    }

    .about-nav .button {
        flex: 1 1 100%;
        text-align: center;
    }

    .about-hero,
    .about-card {
        padding: 1rem;
        border-radius: 16px;
    }

    .about-license {
        grid-template-columns: 1fr;
    }

    .about-content-grid > .about-license {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto;
    }

    .about-content-grid > .about-license > div,
    .about-content-grid > .about-license > a {
        grid-column: 1;
    }

    .about-content-grid > .about-license > a {
        grid-row: 2;
    }
}