.page-about {
    --about-line: rgba(216, 191, 224, 0.18);
    --about-node: #6A2C73;
    --about-node-hot: #FF6A00;
    --about-panel: rgba(216, 191, 224, 0.06);
    --about-accent-text: #D8BFE0;
    color-scheme: dark;
    padding: clamp(1.5rem, 3vw, 3.5rem) clamp(1rem, 4vw, 4.5rem) clamp(2.5rem, 5vw, 5rem);
    width: 100%;
    max-width: 1440px;
    margin-left: auto;
    margin-right: auto;
    font-family: var(--font-body);
    color: var(--c-fg);
    position: relative;
}

.page-about *,
.page-about *::before,
.page-about *::after {
    box-sizing: border-box;
}

.page-about .about-crumbs {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.9rem;
    letter-spacing: 0.02em;
    margin-bottom: clamp(2rem, 5vw, 4rem);
    color: var(--c-silver);
}

.page-about .about-crumb-link {
    color: var(--c-silver);
    text-decoration: none;
    transition: color 0.25s var(--ease);
}

.page-about .about-crumb-link:hover {
    color: var(--c-accent);
}

.page-about .about-crumb-sep {
    color: rgba(168, 159, 174, 0.5);
}

.page-about .about-crumb-current {
    color: var(--c-fg);
    font-weight: 600;
}

.page-about .about-hero {
    margin-bottom: clamp(3rem, 8vw, 6rem);
}

.page-about .about-hero-kicker {
    font-family: var(--font-display);
    font-size: 0.85rem;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--c-accent);
    margin: 0 0 1rem 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.page-about .about-hero-kicker::before {
    content: "";
    width: 32px;
    height: 2px;
    background: linear-gradient(90deg, var(--c-accent), transparent);
    display: inline-block;
}

.page-about .about-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4.6vw, 3.6rem);
    line-height: 1.12;
    font-weight: 700;
    letter-spacing: 0.01em;
    margin: 0 0 clamp(2rem, 4vw, 3.5rem) 0;
    color: var(--c-fg);
    max-width: 16em;
    text-wrap: balance;
}

.page-about .content-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem 2.5rem;
}

.page-about .about-hero-grid {
    align-items: start;
}

.page-about .about-hero-lead {
    font-size: clamp(1.05rem, 1.4vw, 1.25rem);
    line-height: 1.7;
    color: var(--c-fg);
    margin: 0 0 1rem 0;
    max-width: 42em;
}

.page-about .about-hero-meta {
    font-size: 0.85rem;
    color: var(--c-silver);
    letter-spacing: 0.06em;
    margin: 0;
}

.page-about .about-hero-figure {
    margin: 0;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid rgba(216, 191, 224, 0.16);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(145deg, rgba(62, 26, 68, 0.5), rgba(11, 8, 16, 0.8));
    max-width: 500px;
}

.page-about .about-hero-img {
    display: block;
    width: 100%;
    height: auto;
    max-width: 100%;
    object-fit: cover;
    aspect-ratio: 1/1;
}

.page-about .section-panel {
    padding-top: clamp(2.5rem, 6vw, 4.5rem);
    border-top: 1px solid var(--about-line);
    margin-bottom: clamp(2.5rem, 6vw, 4.5rem);
}

.page-about .rail-note {
    min-width: 0;
}

.page-about .section-index {
    font-family: var(--font-mono);
    font-size: 0.88rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--c-accent);
    margin: 0 0 0.75rem 0;
}

.page-about .section-title {
    font-family: var(--font-display);
    font-size: clamp(1.6rem, 2.8vw, 2.4rem);
    line-height: 1.18;
    font-weight: 700;
    margin: 0;
    color: var(--c-fg);
    max-width: 14em;
    text-wrap: balance;
}

.page-about .about-origin-body p {
    font-size: 1rem;
    line-height: 1.75;
    color: rgba(245, 243, 247, 0.9);
    margin: 0 0 1.25rem 0;
    max-width: 42em;
}

.page-about .about-timeline {
    min-width: 0;
    margin-top: 1rem;
}

.page-about .about-timeline-list {
    list-style: none;
    margin: 0;
    padding: 0;
    position: relative;
}

.page-about .about-timeline-list::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.25rem;
    bottom: 0.25rem;
    width: 2px;
    background: linear-gradient(180deg, var(--c-primary), var(--c-accent) 80%, rgba(255, 106, 0, 0.1));
    border-radius: 2px;
}

.page-about .about-timeline-item {
    position: relative;
    padding-left: clamp(2rem, 4vw, 3.5rem);
    margin-bottom: 0;
}

.page-about .about-timeline-node {
    appearance: none;
    background: transparent;
    border: none;
    padding: 0;
    cursor: pointer;
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
    font-family: inherit;
    text-align: left;
    width: 100%;
    color: var(--c-fg);
    position: relative;
    border-radius: 4px;
}

.page-about .about-timeline-node::before {
    content: "";
    position: absolute;
    left: calc(-1 * clamp(2rem, 4vw, 3.5rem) + 0.55rem);
    top: 50%;
    transform: translateY(-50%);
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--about-node);
    border: 3px solid var(--c-dark);
    box-shadow: 0 0 0 2px rgba(106, 44, 115, 0.45), 0 0 18px rgba(106, 44, 115, 0.35);
    transition: transform 0.3s var(--ease), background 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-about .about-timeline-node:hover::before,
.page-about .about-timeline-node:focus-visible::before {
    transform: translateY(-50%) scale(1.15);
    background: var(--about-node-hot);
    box-shadow: 0 0 0 2px rgba(255, 106, 0, 0.4), 0 0 24px rgba(255, 106, 0, 0.45);
}

.page-about .about-timeline-node:focus-visible {
    outline: 2px solid var(--c-accent);
    outline-offset: 6px;
}

.page-about .about-timeline-node[aria-expanded="true"]::before {
    background: var(--about-node-hot);
    box-shadow: 0 0 0 2px rgba(255, 106, 0, 0.4), 0 0 24px rgba(255, 106, 0, 0.5);
}

.page-about .about-timeline-year {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    color: var(--c-fg);
    white-space: nowrap;
}

.page-about .about-timeline-state {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(168, 159, 174, 0.6);
    transition: background 0.3s var(--ease);
}

.page-about .about-timeline-node[aria-expanded="true"] .about-timeline-state {
    background: var(--c-accent);
}

.page-about .about-timeline-detail {
    margin-top: 0.5rem;
    padding: 0.25rem 0 1.75rem 0;
    border-left: 1px solid rgba(216, 191, 224, 0.12);
    padding-left: clamp(0.75rem, 2vw, 1.25rem);
    margin-left: 0.25rem;
}

.page-about .about-timeline-detail[hidden] {
    display: none;
}

.page-about .about-timeline-heading {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    margin: 0 0 0.4rem 0;
    color: var(--c-lilac);
}

.page-about .about-timeline-detail p {
    font-size: 0.95rem;
    line-height: 1.65;
    color: rgba(245, 243, 247, 0.82);
    max-width: 36em;
    margin: 0;
}

.page-about .about-milestone-note,
.page-about .about-tech-note,
.page-about .about-eco-note {
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--c-silver);
    margin: 0.9rem 0 0 0;
    max-width: 20em;
}

.page-about .about-timeline-art {
    margin-top: 1.5rem;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid rgba(216, 191, 224, 0.14);
    background: var(--about-panel);
    max-width: 800px;
}

.page-about .about-timeline-art-img {
    display: block;
    width: 100%;
    height: auto;
    max-width: 100%;
    object-fit: cover;
}

.page-about .about-tech-panel {
    background:
        linear-gradient(135deg, rgba(62, 26, 68, 0.28), rgba(11, 8, 16, 0.5)),
        repeating-linear-gradient(45deg, transparent 0px, transparent 12px, rgba(216, 191, 224, 0.045) 12px, rgba(216, 191, 224, 0.045) 13px);
    border: 1px solid rgba(216, 191, 224, 0.14);
    border-radius: var(--radius);
    padding: clamp(1.5rem, 3vw, 2.5rem);
    box-shadow: var(--shadow-panel);
}

.page-about .about-tech-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
    margin: 0 0 1.5rem 0;
}

.page-about .about-tech-cell {
    padding: 1rem 1rem 1rem 0.5rem;
    border-bottom: 1px solid rgba(216, 191, 224, 0.12);
    min-width: 0;
}

.page-about .about-tech-cell dt {
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--c-silver);
    margin-bottom: 0.4rem;
}

.page-about .about-tech-cell dd {
    margin: 0;
    font-size: 0.95rem;
    color: var(--c-fg);
    font-weight: 500;
}

.page-about .about-tech-num {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--c-lilac);
    margin-right: 0.35rem;
}

.page-about .about-tech-copy {
    font-size: 0.98rem;
    line-height: 1.75;
    color: rgba(245, 243, 247, 0.85);
    margin: 0;
    max-width: 42em;
}

.page-about .about-eco-content {
    min-width: 0;
    display: grid;
    gap: 1.5rem;
}

.page-about .about-eco-figure {
    margin: 0;
}

.page-about .about-eco-map {
    display: block;
    width: 100%;
    height: auto;
    max-width: 100%;
    object-fit: contain;
    border-radius: var(--radius);
    background: linear-gradient(145deg, rgba(62, 26, 68, 0.3), rgba(11, 8, 16, 0.7));
    border: 1px solid rgba(216, 191, 224, 0.14);
    box-shadow: var(--shadow-panel);
}

.page-about .about-eco-caption {
    font-size: 0.8rem;
    color: var(--c-silver);
    padding: 0.6rem 0.25rem 0 0.25rem;
    letter-spacing: 0.04em;
    margin: 0;
}

.page-about .about-eco-list p {
    font-size: 0.98rem;
    line-height: 1.7;
    color: rgba(245, 243, 247, 0.85);
    margin: 0 0 1rem 0;
    max-width: 40em;
}

.page-about .about-eco-list ul {
    list-style: none;
    margin: 0 0 1.25rem 0;
    padding: 0;
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.6rem;
}

.page-about .about-eco-list li {
    position: relative;
    padding-left: 1.4rem;
    font-size: 0.95rem;
    color: var(--c-fg);
    font-family: var(--font-mono);
    letter-spacing: 0.02em;
}

.page-about .about-eco-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--c-accent) 0%, var(--c-accent) 35%, transparent 36%);
    border: 2px solid var(--c-primary);
    box-shadow: 0 0 12px rgba(255, 106, 0, 0.3);
}

.page-about .about-eco-call {
    font-size: 0.95rem;
}

.page-about .about-eco-link {
    color: var(--c-accent);
    text-decoration: none;
    border-bottom: 1px solid rgba(255, 106, 0, 0.3);
    transition: border-color 0.25s var(--ease), color 0.25s var(--ease);
}

.page-about .about-eco-link:hover {
    color: var(--c-lilac);
    border-bottom-color: var(--c-lilac);
}

.page-about .about-followup {
    border-top: 1px solid var(--about-line);
    padding-top: clamp(2rem, 4vw, 3rem);
    margin-bottom: 0;
}

.page-about .about-followup-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem 1.5rem;
}

.page-about .about-follow-link {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    color: var(--c-fg);
    text-decoration: none;
    padding: 0.7rem 1.1rem 0.7rem 0;
    border-bottom: 2px solid rgba(216, 191, 224, 0.18);
    transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .about-follow-link:hover {
    color: var(--c-accent);
    border-bottom-color: var(--c-accent);
}

@media (min-width: 720px) {
    .page-about .content-grid {
        grid-template-columns: minmax(0, 0.34fr) minmax(0, 0.66fr);
        gap: 2.5rem 3rem;
    }

    .page-about .about-hero-grid {
        grid-template-columns: minmax(0, 0.58fr) minmax(0, 0.42fr);
        align-items: center;
    }

    .page-about .about-tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .page-about .about-eco-content {
        grid-template-columns: minmax(0, 0.48fr) minmax(0, 0.52fr);
        align-items: start;
    }

    .page-about .about-eco-list ul {
        grid-template-columns: 1fr;
    }

    .page-about .about-timeline-state {
        display: block;
    }
}

@media (min-width: 1080px) {
    .page-about .about-hero-grid {
        grid-template-columns: minmax(0, 0.6fr) minmax(0, 0.4fr);
    }

    .page-about .about-eco-list ul {
        grid-template-columns: repeat(2, 1fr);
    }

    .page-about .about-tech-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 1.5rem 1rem;
    }

    .page-about .about-tech-cell {
        padding-right: 0.75rem;
    }
}

@media (max-width: 719px) {
    .page-about .about-timeline-node {
        padding: 0.35rem 0;
    }

    .page-about .about-timeline-detail {
        padding-bottom: 1.25rem;
    }

    .page-about .about-eco-figure {
        order: -1;
    }
}

@media (prefers-reduced-motion: no-preference) {
    .page-about [data-reveal] {
        transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
    }

    .page-about [data-reveal] {
        opacity: 1;
        transform: none;
    }
}