.page-about {
    --about-deep-blue: #1F2833;
    --about-overlay-blue: rgba(31, 40, 51, 0.72);
    --about-line: rgba(0, 255, 156, 0.22);
    --about-bold-weight: 700;
    --about-cond: "Oswald", "DIN Condensed", "Bahnschrift Condensed", "Roboto Condensed", "Arial Narrow", "Noto Sans SC", "PingFang SC", sans-serif;
    position: relative;
    background:
        radial-gradient(ellipse 80% 50% at 85% 0%, rgba(0, 255, 156, 0.06), transparent 60%),
        radial-gradient(ellipse 60% 40% at 10% 30%, rgba(77, 159, 255, 0.07), transparent 70%),
        var(--color-bg);
    overflow-x: clip;
}

.page-about .page-container {
    max-width: var(--container);
    margin-inline: auto;
    padding-inline: 1.25rem;
}

/* ---------- 首屏品牌档案声明 ---------- */
.page-about .about-hero {
    position: relative;
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    padding-block: 4rem 2rem;
    border-bottom: 1px solid var(--color-line);
}

.page-about .hero-inner {
    display: flex;
    flex-direction: column;
    gap: 2.25rem;
    z-index: 2;
}

.page-about .hero-context {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.page-about .hero-eyebrow {
    font-family: var(--font-condensed);
    font-size: 0.85rem;
    letter-spacing: 0.22em;
    color: var(--color-muted);
    text-transform: uppercase;
    margin: 0;
}

.page-about .hero-statement {
    max-width: 820px;
}

.page-about .hero-title {
    font-family: var(--font-condensed);
    font-size: 3.2rem;
    font-weight: 600;
    line-height: 1.05;
    letter-spacing: 0.01em;
    color: var(--color-text);
    margin: 0 0 1.25rem;
    text-transform: uppercase;
    background: linear-gradient(135deg, var(--color-text) 50%, rgba(0, 255, 156, 0.85));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.page-about .hero-summary {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--color-silver);
    max-width: 58ch;
    margin: 0;
}

.page-about .hero-summary strong,
.page-about .mission-col p strong,
.page-about .timeline-card strong,
.page-about .capability-detail p strong {
    color: var(--color-accent);
    font-weight: 600;
}

.page-about .hero-metrics {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    border-top: 1px solid var(--color-line);
    padding-top: 1.75rem;
    max-width: 680px;
}

.page-about .metric-block {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding: 0.1rem 0 0.1rem 1rem;
    border-left: 2px solid var(--color-accent);
}

.page-about .metric-num {
    font-family: var(--font-condensed);
    font-size: 1.9rem;
    font-weight: 500;
    color: var(--color-accent);
    line-height: 1.1;
}

.page-about .metric-label {
    font-size: 0.85rem;
    color: var(--color-muted);
}

.page-about .hero-figure {
    margin: 0;
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--color-line);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.4);
}

.page-about .hero-figure img {
    display: block;
    width: 100%;
    max-width: 100%;
    height: auto;
    object-fit: cover;
    aspect-ratio: 4 / 3;
}

.page-about .hero-orb {
    position: absolute;
    top: 3rem;
    right: -6rem;
    width: 13rem;
    height: 13rem;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 255, 156, 0.12) 0%, transparent 65%);
    pointer-events: none;
    z-index: 0;
}

/* ---------- 品牌使命区 ---------- */
.page-about .about-mission {
    padding-block: 4rem 0;
}

.page-about .mission-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

.page-about .mission-col {
    padding: 2rem 0;
    border-top: 1px solid var(--color-line);
    border-bottom: 1px solid var(--color-line);
}

.page-about .mission-col--accent {
    background: linear-gradient(145deg, rgba(31, 40, 51, 0.85), rgba(31, 40, 51, 0.3));
    padding: 2rem;
    border-radius: var(--radius);
    border: 1px solid var(--color-line-accent);
    border-top-color: var(--color-line-accent);
    border-bottom-color: var(--color-line-accent);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.page-about .mission-col blockquote {
    margin: 0;
    padding: 0;
    border: none;
    font-size: 1.2rem;
    line-height: 1.7;
    color: var(--color-silver);
}

.page-about .mission-col blockquote p {
    margin: 0 0 1rem;
}

.page-about .mission-col blockquote::before {
    content: attr(data-quote);
    display: block;
    font-family: var(--font-condensed);
    font-size: 0.8rem;
    color: var(--color-accent);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 0.6rem;
}

.page-about .mission-col p {
    font-size: 0.95rem;
    line-height: 1.85;
    color: var(--color-muted);
    margin: 0.75rem 0;
}

.page-about .mission-col .section-title {
    font-family: var(--font-condensed);
    font-size: 2.4rem;
    margin-bottom: 0.75rem;
    color: var(--color-text);
}

.page-about .mission-col .section-subtitle {
    font-size: 1rem;
    line-height: 1.75;
    color: var(--color-silver);
    max-width: 42ch;
    margin: 0 0 1rem;
}

.page-about .mission-col .btn {
    margin-top: 0.25rem;
}

/* ---------- 区块通用头部 ---------- */
.page-about .section {
    position: relative;
    padding-block: 4rem;
    scroll-margin-top: 96px;
}

.page-about .section--tight {
    padding-block: 2.5rem;
}

.page-about .section-heading {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 2rem;
    margin-block-end: 2.5rem;
}

.page-about .section-heading .section-title,
.page-about .capability-header .section-title,
.page-about .recognition-main .section-title {
    font-family: var(--font-condensed);
    font-size: 2.6rem;
    font-weight: 500;
    line-height: 1.1;
    margin: 0.3rem 0 0.6rem;
    color: var(--color-text);
    letter-spacing: 0.01em;
}

.page-about .section-heading .section-subtitle,
.page-about .capability-header .section-subtitle {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-muted);
    max-width: 52ch;
    margin: 0;
}

.page-about .section-mark {
    font-family: var(--font-condensed);
    font-size: 0.9rem;
    letter-spacing: 0.28em;
    color: var(--color-accent);
    display: flex;
    align-items: center;
    gap: 0.6rem;
    position: relative;
}

.page-about .section-mark::before {
    content: "";
    display: inline-block;
    width: 1.8rem;
    height: 2px;
    background: var(--color-accent);
    vertical-align: middle;
}

.page-about .journey-note {
    font-size: 0.85rem;
    color: var(--color-muted);
    border-left: 1px solid var(--color-line);
    padding-left: 1.2rem;
    margin: 0;
    flex-shrink: 0;
}

/* ---------- 发展历程：垂直时间轴 ---------- */
.page-about .about-journey {
    border-top: 1px solid var(--color-line);
    margin-top: 2rem;
}

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

.page-about .timeline::before {
    content: "";
    position: absolute;
    left: 0.75rem;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--color-accent) 0%, rgba(0, 255, 156, 0.05) 100%);
}

.page-about .timeline-item {
    position: relative;
    margin-bottom: 2.25rem;
    padding-left: 2.25rem;
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.75rem;
}

.page-about .timeline-item::before {
    content: "";
    position: absolute;
    left: 0.62rem;
    top: 0.3rem;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-accent);
    box-shadow: 0 0 0 4px rgba(0, 255, 156, 0.14);
}

.page-about .timeline-year {
    font-family: var(--font-condensed);
    font-size: 2rem;
    font-weight: 500;
    line-height: 1;
    color: var(--color-accent);
    letter-spacing: 0.04em;
}

.page-about .timeline-card {
    background: var(--about-overlay-blue);
    border: 1px solid var(--color-line);
    border-radius: var(--radius-sm);
    padding: 1.5rem 1.5rem 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
}

.page-about .timeline-item:hover .timeline-card {
    border-color: var(--color-line-accent);
    box-shadow: 0 8px 32px rgba(0, 255, 156, 0.08);
    transform: translateY(-2px);
}

.page-about .timeline-card h3 {
    font-size: 1.15rem;
    color: var(--color-text);
    margin: 0;
    line-height: 1.4;
}

.page-about .timeline-card p {
    font-size: 0.92rem;
    line-height: 1.8;
    color: var(--color-muted);
    margin: 0;
}

.page-about .timeline-card a {
    color: var(--color-accent);
    font-weight: 500;
    text-decoration: none;
    font-size: 0.92rem;
}

.page-about .timeline-card a:hover {
    text-decoration: underline;
}

.page-about .timeline-card .tag {
    align-self: flex-start;
    margin-top: 0.25rem;
}

/* ---------- 数据能力 ---------- */
.page-about .about-capability {
    border-top: 1px solid var(--color-line);
}

.page-about .capability-header {
    margin-bottom: 2.5rem;
}

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

.page-about .capability-figure {
    margin: 0;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--color-line);
    position: sticky;
    top: 0;
}

.page-about .capability-figure img {
    display: block;
    width: 100%;
    max-width: 100%;
    height: auto;
    object-fit: cover;
    aspect-ratio: 3 / 2;
    filter: saturate(0.85) contrast(0.92);
}

.page-about .capability-content {
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
}

.page-about .capability-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
}

.page-about .capability-item {
    display: grid;
    grid-template-columns: 5.5rem 1fr;
    gap: 1rem;
    align-items: start;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-line);
}

.page-about .capability-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.page-about .capability-num {
    font-family: var(--font-condensed);
    font-size: 2.2rem;
    font-weight: 500;
    color: var(--color-accent);
    line-height: 1;
    letter-spacing: 0.02em;
}

.page-about .capability-detail h3 {
    font-size: 1.02rem;
    color: var(--color-text);
    margin: 0 0 0.45rem;
}

.page-about .capability-detail p {
    font-size: 0.92rem;
    line-height: 1.8;
    color: var(--color-muted);
    margin: 0;
}

.page-about .capability-note {
    font-size: 0.9rem;
    line-height: 1.8;
    color: var(--color-silver);
    border-left: 2px solid var(--color-info);
    padding: 0.75rem 1rem;
    background: rgba(77, 159, 255, 0.06);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin: 0;
}

/* ---------- 团队与文化 ---------- */
.page-about .about-team {
    border-top: 1px solid var(--color-line);
}

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

.page-about .team-culture {
    margin: 0;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--color-line);
}

.page-about .team-culture figure {
    margin: 0;
}

.page-about .team-culture img {
    display: block;
    width: 100%;
    max-width: 100%;
    height: auto;
    object-fit: cover;
    aspect-ratio: 21 / 9;
    filter: saturate(0.7);
}

.page-about .team-principles {
    padding: 0;
}

.page-about .team-principles h3 {
    font-family: var(--font-condensed);
    font-size: 1.6rem;
    color: var(--color-text);
    margin: 0 0 1.75rem;
    letter-spacing: 0.02em;
}

.page-about .principle-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.page-about .principle-list li {
    display: grid;
    grid-template-columns: 2.6rem 1fr;
    gap: 1rem;
    padding: 1.5rem 1.25rem 1.25rem;
    background: rgba(31, 40, 51, 0.45);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-line);
    transition: border-color 0.3s ease;
}

.page-about .principle-list li:hover {
    border-color: var(--color-line-accent);
}

.page-about .principle-index {
    font-family: var(--font-condensed);
    font-size: 1.4rem;
    color: var(--color-accent);
    line-height: 1;
    padding-top: 0.2rem;
}

.page-about .principle-list h4 {
    font-size: 1rem;
    color: var(--color-text);
    margin: 0 0 0.4rem;
}

.page-about .principle-list p {
    font-size: 0.9rem;
    line-height: 1.75;
    color: var(--color-muted);
    margin: 0;
}

/* ---------- 认可与荣誉 ---------- */
.page-about .about-recognition {
    border-top: 1px solid var(--color-line);
}

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

.page-about .recognition-list {
    list-style: none;
    margin: 1.75rem 0 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.page-about .recognition-item {
    display: grid;
    grid-template-columns: 5.5rem 1fr;
    gap: 1.25rem;
    padding: 1.25rem;
    border: 1px solid var(--color-line);
    border-radius: var(--radius-sm);
    background: rgba(18, 22, 29, 0.5);
    transition: border-color 0.3s ease;
}

.page-about .recognition-item:hover {
    border-color: var(--color-line-accent);
}

.page-about .recognition-year {
    font-family: var(--font-condensed);
    font-size: 1.4rem;
    color: var(--color-accent);
    line-height: 1;
    padding-top: 0.15rem;
}

.page-about .recognition-item h3 {
    font-size: 1.02rem;
    color: var(--color-text);
    margin: 0 0 0.4rem;
}

.page-about .recognition-item p {
    font-size: 0.92rem;
    line-height: 1.7;
    color: var(--color-muted);
    margin: 0;
}

.page-about .recognition-aside {
    display: flex;
}

.page-about .aside-card {
    background: linear-gradient(155deg, rgba(31, 40, 51, 0.9), rgba(31, 40, 51, 0.45));
    border: 1px solid var(--color-line-accent);
    border-radius: var(--radius);
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    width: 100%;
}

.page-about .aside-card h3 {
    font-family: var(--font-condensed);
    font-size: 1.4rem;
    color: var(--color-text);
    margin: 0;
    letter-spacing: 0.02em;
}

.page-about .aside-card ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.page-about .aside-card ul li {
    font-size: 0.92rem;
    line-height: 1.7;
    color: var(--color-silver);
    padding-left: 1.15rem;
    position: relative;
}

.page-about .aside-card ul li::before {
    content: "◆";
    position: absolute;
    left: 0;
    top: 0.1rem;
    font-size: 0.65rem;
    color: var(--color-accent);
}

.page-about .aside-card ul li a {
    color: var(--color-info);
    text-decoration: none;
}

.page-about .aside-card ul li a:hover {
    text-decoration: underline;
}

.page-about .aside-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 255, 156, 0.3), transparent);
    margin: 0.25rem 0;
}

.page-about .aside-contact-note {
    font-size: 0.9rem;
    line-height: 1.75;
    color: var(--color-muted);
    margin: 0;
}

.page-about .aside-card .btn {
    align-self: flex-start;
}

/* ---------- 共享组件补充 ---------- */
.page-about .prose {
    font-size: 1rem;
    line-height: 1.85;
    color: var(--color-muted);
}

.page-about .data-table {
    width: 100%;
    border-collapse: collapse;
    font-variant-numeric: tabular-nums;
}

.page-about .data-table th,
.page-about .data-table td {
    text-align: left;
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--color-line);
}

.page-about .data-table th {
    font-family: var(--font-condensed);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-accent);
    font-weight: 500;
}

.page-about .data-table td {
    color: var(--color-silver);
    font-variant-numeric: tabular-nums;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 768px) {
    .page-about .about-hero {
        grid-template-columns: 1.25fr 0.75fr;
        gap: 3rem;
        padding-block: 6rem 3rem;
    }

    .page-about .hero-inner {
        gap: 2.5rem;
    }

    .page-about .hero-title {
        font-size: 4.4rem;
    }

    .page-about .hero-figure {
        align-self: end;
        margin-bottom: 1rem;
    }

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

    .page-about .metric-num {
        font-size: 1.9rem;
    }

    .page-about .about-mission {
        padding-block: 5rem 0;
    }

    .page-about .mission-grid {
        grid-template-columns: 1.2fr 0.8fr;
        gap: 3rem;
        align-items: start;
    }

    .page-about .mission-col--accent {
        padding: 2.75rem;
    }

    .page-about .section {
        padding-block: 5.5rem;
    }

    .page-about .section-heading {
        align-items: center;
    }

    .page-about .section-heading .section-title,
    .page-about .capability-header .section-title,
    .page-about .recognition-main .section-title {
        font-size: 3.2rem;
    }

    .page-about .timeline {
        padding-left: 0;
    }

    .page-about .timeline::before {
        left: 4.5rem;
    }

    .page-about .timeline-item {
        grid-template-columns: 6.5rem 1fr;
        gap: 1.5rem;
        padding-left: 5rem;
    }

    .page-about .timeline-item::before {
        left: 4.35rem;
        top: 0.55rem;
    }

    .page-about .timeline-year {
        font-size: 2.4rem;
        text-align: right;
        padding-top: 0.25rem;
    }

    .page-about .capability-layout {
        grid-template-columns: 1.1fr 0.9fr;
        gap: 3rem;
        align-items: start;
    }

    .page-about .capability-figure {
        position: sticky;
        top: 90px;
    }

    .page-about .capability-item {
        grid-template-columns: 6.5rem 1fr;
    }

    .page-about .team-layout {
        grid-template-columns: 0.9fr 1.1fr;
        gap: 3rem;
        align-items: start;
    }

    .page-about .team-culture {
        position: sticky;
        top: 90px;
    }

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

    .page-about .recognition-grid {
        grid-template-columns: 1fr 0.6fr;
        gap: 3rem;
        align-items: start;
    }

    .page-about .recognition-aside {
        position: sticky;
        top: 90px;
    }
}

/* ---------- 大桌面端 ---------- */
@media (min-width: 1024px) {
    .page-about .about-hero {
        padding-block: 7rem 4rem;
    }

    .page-about .hero-title {
        font-size: 5.2rem;
    }

    .page-about .hero-summary {
        font-size: 1.1rem;
    }

    .page-about .section {
        padding-block: 6rem;
    }

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

/* ---------- 减少动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
    .page-about .timeline-card {
        transition: none;
    }

    .page-about .capability-figure,
    .page-about .team-culture,
    .page-about .recognition-aside {
        position: static;
    }
}