/* ===========================================
   关于页 — 东方墨韵 Editorial Layout
   =========================================== */

/* ── Page Header ── */
.about-header {
    padding: calc(64px + var(--space-3xl)) 0 var(--space-xl);
    text-align: center;
    background: var(--bg-ink);
    position: relative;
}

.about-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 1px;
    background: var(--accent);
}

.about-header-inner {
    max-width: 760px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.about-kicker {
    font-family: var(--font-display);
    font-size: 13px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 16px;
}

.about-company-name {
    font-family: var(--font-display);
    font-size: clamp(32px, 5vw, 52px);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
    margin-bottom: 20px;
    letter-spacing: 0.04em;
}

.about-subtitle {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 520px;
    margin: 0 auto var(--space-lg);
}

.about-header-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
}

.about-header-stat {
    text-align: center;
}

.about-header-stat .stat-value {
    font-family: var(--font-display-en);
    font-size: 28px;
    font-weight: 700;
    color: var(--gold);
    letter-spacing: -0.02em;
}

.about-header-stat .stat-label {
    font-size: 13px;
    color: var(--text-tertiary);
    margin-top: 4px;
}

/* ── Company Profile — Two-column editorial ── */
.about-profile {
    padding: var(--space-2xl) 0;
    background: var(--bg-paper);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.about-profile-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: var(--space-xl);
}

.about-profile-heading {
    position: sticky;
    top: calc(64px + var(--space-lg));
    align-self: start;
}

.about-profile-heading .section-eyebrow {
    margin-bottom: 12px;
}

.about-profile-heading .section-title {
    font-size: clamp(24px, 3vw, 32px);
    margin-bottom: 0;
}

.about-profile-body {
    max-width: 640px;
}

.about-profile-body p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: var(--space-md);
}

.about-profile-body p:last-of-type {
    margin-bottom: var(--space-xl);
}

.about-metrics {
    display: flex;
    align-items: center;
    gap: 0;
    flex-wrap: wrap;
}

.about-metric {
    display: flex;
    align-items: baseline;
    gap: 8px;
    padding: 0 var(--space-md);
    white-space: nowrap;
}

.about-metric:first-child {
    padding-left: 0;
}

.about-metric:not(:last-child) {
    border-right: 1px solid var(--border-strong);
}

.about-metric .metric-value {
    font-family: var(--font-display-en);
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
}

.about-metric .metric-label {
    font-size: 14px;
    color: var(--text-tertiary);
}

/* ── Core Values — 2×2 Grid ── */
.about-values {
    padding: var(--space-2xl) 0;
    background: var(--bg-ink);
}

.about-values-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.about-values-header {
    margin-bottom: var(--space-xl);
}

.about-values-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

.value-block {
    background: var(--bg-paper);
    border-left: 3px solid var(--accent);
    border-radius: var(--radius-sm);
    padding: var(--space-lg) var(--space-lg);
    position: relative;
    transition: background 0.3s ease;
}

.value-block:hover {
    background: var(--bg-panel);
}

.value-block::before {
    content: '\201C';
    position: absolute;
    top: 16px;
    right: 24px;
    font-family: var(--font-display-en);
    font-size: 64px;
    line-height: 1;
    color: var(--border-strong);
    pointer-events: none;
}

.value-block h3 {
    font-family: var(--font-display);
    font-size: 20px;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.value-block p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 420px;
}

/* ── Timeline — Vertical brush-stroke ── */
.about-timeline {
    padding: var(--space-2xl) 0;
    background: var(--bg-paper);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.about-timeline-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.about-timeline-header {
    margin-bottom: var(--space-xl);
}

.timeline-track {
    position: relative;
    padding-left: 160px;
}

.timeline-track::before {
    content: '';
    position: absolute;
    left: 139px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: var(--accent);
    opacity: 0.5;
}

.timeline-node {
    position: relative;
    padding: 0 0 var(--space-xl) var(--space-lg);
}

.timeline-node:last-child {
    padding-bottom: 0;
}

.timeline-year {
    position: absolute;
    left: -160px;
    top: 0;
    width: 120px;
    text-align: right;
    font-family: var(--font-display-en);
    font-size: 28px;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: -0.02em;
    line-height: 1.3;
}

.timeline-node::before {
    content: '';
    position: absolute;
    left: calc(-1 * var(--space-lg) - 4px);
    top: 10px;
    width: 10px;
    height: 10px;
    background: var(--accent);
    border-radius: 50%;
    border: 2px solid var(--bg-paper);
    box-shadow: 0 0 0 2px var(--accent);
}

.timeline-node-title {
    font-family: var(--font-display);
    font-size: 18px;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.timeline-node-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 520px;
}

/* ── Contact — Table-style ── */
.about-contact {
    padding: var(--space-2xl) 0;
    background: var(--bg-ink);
}

.about-contact-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: var(--space-xl);
}

.about-contact-heading {
    position: sticky;
    top: calc(64px + var(--space-lg));
    align-self: start;
}

.about-contact-heading .section-title {
    font-size: clamp(24px, 3vw, 32px);
    margin-bottom: 12px;
}

.about-contact-intro {
    font-size: 15px;
    color: var(--text-tertiary);
    line-height: 1.8;
}

.contact-table {
    display: grid;
    gap: 0;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-md);
    overflow: hidden;
    max-width: 520px;
}

.contact-row {
    display: grid;
    grid-template-columns: 120px 1fr;
    border-bottom: 1px solid var(--border);
}

.contact-row:last-child {
    border-bottom: none;
}

.contact-row-label {
    padding: 16px 20px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-muted);
    background: var(--bg-paper);
    border-right: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 8px;
    letter-spacing: 0.04em;
}

.contact-row-label i {
    font-size: 12px;
    color: var(--text-muted);
    width: 16px;
    text-align: center;
}

.contact-row-value {
    padding: 16px 20px;
    font-size: 14px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
}

.contact-row-value a {
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.contact-row-value a:hover {
    color: var(--accent);
}

/* ── CTA ── */
.about-cta {
    padding: var(--space-3xl) 0;
    background: var(--bg-paper);
    border-top: 1px solid var(--border);
    text-align: center;
    position: relative;
}

.about-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 1px;
    background: var(--accent);
}

.about-cta-inner {
    max-width: 520px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.about-cta h2 {
    font-family: var(--font-display);
    font-size: clamp(26px, 3.5vw, 36px);
    color: var(--text-primary);
    margin-bottom: 12px;
}

.about-cta p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-lg);
}

.about-cta .cta-buttons {
    display: flex;
    justify-content: center;
    gap: 12px;
}

/* ── Responsive ── */
@media (max-width: 900px) {
    .about-profile-inner {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }

    .about-profile-heading {
        position: static;
    }

    .about-contact-inner {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }

    .about-contact-heading {
        position: static;
    }

    .timeline-track {
        padding-left: 100px;
    }

    .timeline-track::before {
        left: 79px;
    }

    .timeline-year {
        left: -100px;
        width: 64px;
        font-size: 22px;
    }
}

@media (max-width: 600px) {
    .about-header {
        padding: calc(64px + var(--space-xl)) 0 var(--space-lg);
    }

    .about-header-stats {
        flex-direction: column;
        gap: var(--space-sm);
        align-items: center;
    }

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

    .about-metrics {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-sm);
    }

    .about-metric {
        padding: 0;
        border-right: none !important;
    }

    .timeline-track {
        padding-left: 0;
        padding-top: 0;
    }

    .timeline-track::before {
        left: 4px;
    }

    .timeline-year {
        position: static;
        width: auto;
        text-align: left;
        font-size: 20px;
        margin-bottom: 4px;
    }

    .timeline-node {
        padding-left: var(--space-lg);
    }

    .timeline-node::before {
        left: 0;
    }

    .contact-row {
        grid-template-columns: 1fr;
    }

    .contact-row-label {
        border-right: none;
        border-bottom: 1px solid var(--border);
        padding: 12px 16px;
    }

    .contact-row-value {
        padding: 12px 16px;
    }

    .about-cta .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
}