/* =============================================================
   ABOUT PAGE — about.css
   ============================================================= */

/* ---- Page Hero (blue full-width banner) ---- */
.about-hero {
    position: relative;
    height: 80vh;
    min-height: 420px;
    overflow: hidden;
    display: flex;
    align-items: center;
    padding-top: 0;
    padding-bottom: 0;
    color: var(--color-white);
}

/* 背景图样式（和产品页完全一致） */
.about-hero__bg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 深色渐变遮罩（让文字更清晰） */
.about-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to right, rgba(10, 20, 60, .65) 0%, rgba(10, 20, 60, .2) 100%);
    z-index: 1;
}

/* 内容容器层级提高，显示在背景图上方 */
.about-hero .container {
    position: relative;
    z-index: 2;
    width: 100%;
}

.about-hero__label {
    color: var(--color-accent-green);
}

.about-hero__title {
    font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-5xl));
    font-weight: var(--font-weight-bold);
    margin-block: var(--space-4) var(--space-6);
}

.about-hero__desc {
    font-size: var(--font-size-md);
    color: rgba(255,255,255,.8);
    max-width: 680px;
    line-height: var(--line-height-loose);
    margin-bottom: var(--space-12);
}

/* Static logo image inside the about hero title */
.about-hero__logo {
    height: auto;
    width: auto;
    max-height: 72px;
    max-width: 320px;
    object-fit: contain;
}

/* Stats row inside hero */
.about-hero__stats {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: var(--space-3);
    padding-top: var(--space-8);
    border-top: 1px solid rgba(255,255,255,.15);
}

.about-hero__stat {
    background: rgba(255,255,255,.1);
    border-radius: var(--radius-md);
    padding: var(--space-5);
    text-align: center;
    transition: background var(--transition-fast);
}

.about-hero__stat:hover {
    background: rgba(255,255,255,.18);
}

.about-hero__stat-value {
    font-size: clamp(var(--font-size-xl), 2.5vw, var(--font-size-3xl));
    font-weight: var(--font-weight-bold);
    color: var(--color-white);
    line-height: 1;
    margin-bottom: var(--space-2);
}

.about-hero__stat-label {
    font-size: var(--font-size-xs);
    color: rgba(255,255,255,.65);
    letter-spacing: 0.05em;
}

/* ---- Company Overview ---- */
.company-overview {
    background: var(--color-white);
}

.company-overview__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

.company-overview__text p {
    color: var(--color-gray-600);
    line-height: var(--line-height-loose);
    margin-bottom: var(--space-5);
}

.company-overview__text strong {
    color: var(--color-primary);
}

.company-overview__badges {
    display: flex;
    gap: var(--space-4);
    margin-top: var(--space-8);
    flex-wrap: wrap;
}

.overview-badge {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-bold);
}

.overview-badge--primary {
    background: var(--color-primary);
    color: var(--color-white);
}

.overview-badge--green {
    background: var(--color-accent-green);
    color: var(--color-white);
}

.overview-badge__value {
    font-size: var(--font-size-xl);
    line-height: 1;
}

.overview-badge__label {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-normal);
    opacity: .85;
}

.company-overview__image-wrap {
    position: relative;
}

.company-overview__img {
    width: 100%;
    border-radius: var(--radius-lg);
    object-fit: cover;
    aspect-ratio: 4/3;
}

.company-overview__badge-corner {
    position: absolute;
    bottom: var(--space-4);
    right: var(--space-4);
    background: var(--color-white);
    border-radius: var(--radius-md);
    padding: var(--space-3) var(--space-4);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.company-overview__badge-corner svg {
    color: var(--color-primary);
}

.company-overview__badge-corner-text strong {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}

.company-overview__badge-corner-text span {
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
}

/* ---- Development History (Timeline) ---- */
.history {
    background: var(--color-gray-100);
}

.history__timeline {
    position: relative;
    max-width: 700px;
    margin-inline: auto;
    margin-top: var(--space-12);
}

/* Center vertical line */
.history__timeline::before {
    content: '';
    position: absolute;
    inset-block: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    background: var(--color-gray-300);
}

.timeline-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-6);
    margin-bottom: var(--space-8);
    position: relative;
}

/* Alternate left/right */
.timeline-item:nth-child(odd) {
    flex-direction: row-reverse;
    text-align: right;
}

.timeline-item:nth-child(odd) .timeline-item__content {
    align-items: flex-end;
}

/* Center dot */
.timeline-item__dot {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--color-gray-300);
    border: 3px solid var(--color-white);
    box-shadow: 0 0 0 2px var(--color-gray-300);
    flex-shrink: 0;
    z-index: 1;
    top: 6px;
}

.timeline-item--highlight .timeline-item__dot {
    background: var(--color-primary);
    box-shadow: 0 0 0 2px var(--color-primary);
}

.timeline-item__content {
    width: calc(50% - var(--space-8));
    display: flex;
    flex-direction: column;
}

.timeline-item__year {
    display: inline-block;
    padding: var(--space-1) var(--space-3);
    background: var(--color-primary);
    color: var(--color-white);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-bold);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-2);
    align-self: flex-start;
}

.timeline-item:nth-child(odd) .timeline-item__year {
    align-self: flex-end;
}

.timeline-item--highlight .timeline-item__year {
    background: var(--color-primary);
}

.timeline-item__title {
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-800);
    margin-bottom: var(--space-1);
}

.timeline-item__desc {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    line-height: var(--line-height-base);
}

/* ---- Organization Structure ---- */
.org-structure {
    background: var(--color-white);
}

.org-chart {
    margin-top: var(--space-12);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
}

.org-node {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4) var(--space-8);
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-sm);
    text-align: center;
    min-width: 160px;
}

.org-node--ceo {
    background: var(--color-primary);
    color: var(--color-white);
    font-size: var(--font-size-md);
    min-width: 200px;
    flex-direction: column;
    gap: var(--space-1);
}

.org-node--ceo span {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-normal);
    opacity: .8;
}

.org-node--vp {
    background: var(--color-accent-green);
    color: var(--color-white);
    min-width: 150px;
    flex-direction: column;
    gap: var(--space-1);
}

.org-node--dept {
    background: var(--color-white);
    color: var(--color-gray-700);
    border: 1px solid var(--color-gray-300);
    flex-direction: column;
    gap: var(--space-1);
    min-width: 130px;
    transition: all var(--transition-fast);
}

.org-node--dept:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.org-connector {
    width: 2px;
    height: 32px;
    background: var(--color-gray-300);
}

.org-level {
    display: flex;
    gap: var(--space-4);
    align-items: stretch;
    position: relative;
}

.org-level::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    height: 2px;
    background: var(--color-gray-300);
    width: calc(100% - 130px);
}

/* ---- Subsidiaries ---- */
.subsidiaries {
    background: var(--color-gray-100);
}

.subsidiaries__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
    margin-top: var(--space-12);
}

.subsidiary-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
    border: 1px solid var(--color-gray-200);
    transition: box-shadow var(--transition-base);
}

.subsidiary-card:hover {
    box-shadow: var(--shadow-lg);
}

.subsidiary-card__location {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
    margin-bottom: var(--space-4);
}

.subsidiary-card__icon {
    width: 48px;
    height: 48px;
    background: var(--color-gray-100);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-4);
    color: var(--color-primary);
}

.subsidiary-card__title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-gray-900);
    margin-bottom: var(--space-1);
}

.subsidiary-card__subtitle {
    font-size: var(--font-size-xs);
    color: var(--color-accent-green);
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: var(--space-5);
}

.subsidiary-card__desc {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    line-height: var(--line-height-loose);
    margin-bottom: var(--space-5);
}

.subsidiary-card__tags {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.tag {
    padding: var(--space-1) var(--space-3);
    background: var(--color-gray-100);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    color: var(--color-gray-600);
    border: 1px solid var(--color-gray-200);
}

/* ---- Certifications ---- */
.certifications {
    background: var(--color-primary);
    color: var(--color-white);
}

.certifications .section-subtitle {
    color: rgba(255,255,255,.7);
    margin-inline: auto;
}

.certifications__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-4);
    margin-top: var(--space-12);
}

.cert-card {
    background: rgba(255,255,255,.08);
    border: 1px solid rgba(255,255,255,.15);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    text-align: center;
    transition: all var(--transition-base);
}

.cert-card:hover {
    background: rgba(255,255,255,.15);
    transform: translateY(-4px);
}

.cert-card__icon {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--color-accent-green);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-inline: auto;
    margin-bottom: var(--space-4);
    color: var(--color-white);
}

.cert-card__name {
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-2);
}

.cert-card__desc {
    font-size: var(--font-size-xs);
    color: rgba(255,255,255,.65);
}

.certifications__footer {
    display: flex;
    justify-content: center;
    gap: var(--space-12);
    margin-top: var(--space-10);
    padding-top: var(--space-8);
    border-top: 1px solid rgba(255,255,255,.1);
    flex-wrap: wrap;
}

.certifications__footer-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--font-size-sm);
    color: rgba(255,255,255,.75);
}

.certifications__footer-item svg {
    color: var(--color-accent-green);
}

/* ---- Corporate Culture ---- */
.culture {
    background: var(--color-white);
}

.culture__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
    margin-top: var(--space-12);
}

.culture__main-card {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent-green) 100%);
    border-radius: var(--radius-lg);
    padding: var(--space-10);
    color: var(--color-white);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    min-height: 280px;
}

.culture__main-label {
    font-size: var(--font-size-xs);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    opacity: .75;
    margin-bottom: var(--space-3);
}

.culture__main-slogan {
    font-size: clamp(var(--font-size-lg), 2.5vw, var(--font-size-2xl));
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
}

.culture__main-slogan::after {
    content: '';
    display: block;
    width: 40px;
    height: 3px;
    background: var(--color-white);
    margin-top: var(--space-4);
    border-radius: var(--radius-full);
}

.culture__values {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
}

.culture__value-card {
    background: var(--color-gray-100);
    border-radius: var(--radius-md);
    padding: var(--space-6);
    transition: all var(--transition-base);
    border: 1px solid var(--color-gray-200);
}

.culture__value-card:hover {
    background: var(--color-white);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}

.culture__value-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin-bottom: var(--space-2);
}

.culture__value-desc {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

/* ---- CTA Banner ---- */
.about-cta {
    background: var(--color-gray-100);
    text-align: center;
}

.about-cta__title {
    font-size: clamp(var(--font-size-2xl), 4vw, var(--font-size-3xl));
    font-weight: var(--font-weight-bold);
    color: var(--color-gray-900);
    margin-bottom: var(--space-4);
}

.about-cta__desc {
    font-size: var(--font-size-md);
    color: var(--color-gray-600);
    max-width: 560px;
    margin-inline: auto;
    margin-bottom: var(--space-8);
    line-height: var(--line-height-loose);
}

.about-cta__actions {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
    flex-wrap: wrap;
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
    .about-hero__stats {
        grid-template-columns: repeat(3, 1fr);
    }
    .certifications__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .about-hero__stats {
        grid-template-columns: repeat(2, 1fr);
    }
    .company-overview__inner {
        grid-template-columns: 1fr;
    }
    .subsidiaries__grid {
        grid-template-columns: 1fr;
    }
    .culture__inner {
        grid-template-columns: 1fr;
    }
    .history__timeline::before {
        left: 16px;
    }
    .timeline-item {
        flex-direction: row !important;
        text-align: left !important;
    }
    .timeline-item:nth-child(odd) .timeline-item__content {
        align-items: flex-start;
    }
    .timeline-item__dot {
        left: 16px;
    }
    .timeline-item__content {
        width: calc(100% - 40px);
        margin-left: 40px;
    }
    .timeline-item:nth-child(odd) .timeline-item__year {
        align-self: flex-start;
    }
    .org-level {
        flex-wrap: wrap;
        justify-content: center;
    }
    .org-level::before {
        display: none;
    }
}

@media (max-width: 480px) {
    .certifications__grid {
        grid-template-columns: 1fr 1fr;
    }
    .certifications__footer {
        gap: var(--space-6);
    }
}



/* ============================================================
   SUSTAINABILITY TIMELINE (S-shaped connected blocks)
   ============================================================ */
.sustain-timeline__list {
    --sustain-line-color: var(--color-accent-green);
    --sustain-line-width: 2px;
    --sustain-gap: var(--space-12);
    --sustain-col-gap: var(--space-16);
    --sustain-img-h: 420px;
    position: relative;
    display: flex;
    flex-direction: column;
    gap: var(--sustain-gap);
    margin-top: var(--space-12);
}

.sustain-row {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--sustain-col-gap);
}

.sustain-row--reversed {
    flex-direction: row-reverse;
}

.sustain-row__text,
.sustain-row__media {
    width: calc(50% - var(--sustain-col-gap) / 2);
    min-width: 0;
}
/* normal row (text-left / image-right): keep text clear of the line on its right. */
.sustain-row--normal .sustain-row__text {
    padding-right: 15%;
}

/* reversed row (image-left / text-right): keep text clear of the line on its left. */
.sustain-row--reversed .sustain-row__text {
    padding-left: 15%;
}

.sustain-row__title {
    font-size: clamp(var(--font-size-lg), 2vw, var(--font-size-2xl));
    font-weight: var(--font-weight-bold);
    color: var(--color-accent-green);
    margin-bottom: var(--space-4);
}

.sustain-row__divider {
    width: 100%;
    height: 1px;
    background: var(--color-accent-green);
    opacity: .4;
    margin-bottom: var(--space-5);
}

.sustain-row__desc {
    font-size: var(--font-size-sm);
    line-height: var(--line-height-loose);
    color: var(--color-gray-500);
    margin-bottom: var(--space-4);
}

.sustain-row__btn {
    margin-top: var(--space-2);
}

/* Fixed image box: locked height + cover so every row aligns identically. */
.sustain-row__media {
    position: relative;
}

.sustain-row__media img {
    display: block;
    width: 100%;
    height: var(--sustain-img-h);
    object-fit: cover;
    object-position: center;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

/* ---- S-shaped connector lines (desktop) ---- */
/* The vertical line drops from THIS image's horizontal center, then turns
   horizontally at the NEXT image's vertical center and runs into it. */

/* Vertical segment: starts at this image's bottom center, runs down to the
   next image's vertical-center height. */
.sustain-row__media::before {
    content: "";
    position: absolute;
    top: 100%;
    width: var(--sustain-line-width);
    height: calc(var(--sustain-gap) + var(--sustain-img-h) / 2);
    background: var(--sustain-line-color);
    transform: translateX(-50%);
    z-index: -1;
}

/* normal row: image on the right -> drop line at 25% of the image (toward text). */
.sustain-row--normal .sustain-row__media::before {
    left: 25%;
}

/* reversed row: image on the left -> drop line at 75% of the image (toward text). */
.sustain-row--reversed .sustain-row__media::before {
    left: 75%;
}

/* Horizontal segment: at the next image's vertical center, turn toward the
   next image (which sits on the opposite side) and connect to its edge. */
.sustain-row__media::after {
    content: "";
    position: absolute;
    top: calc(100% + var(--sustain-gap) + var(--sustain-img-h) / 2);
    height: var(--sustain-line-width);
    background: var(--sustain-line-color);
    transform: translateY(-50%);
    z-index: -1;
}


.sustain-row--normal .sustain-row__media::after {
    /* right edge of the line sits at the drop point (25% from left = 75% from right) */
    right: 75%;
    width: 36%;
}

.sustain-row--reversed .sustain-row__media::after {
    /* left edge of the line sits at the drop point (75% from left) */
    left: 75%;
    width: 36%;
}

/* Last row has no outgoing connector. */
.sustain-row:last-child .sustain-row__media::before,
.sustain-row:last-child .sustain-row__media::after {
    display: none;
}

/* ---- Mobile: stack text over image, hide connectors ---- */
@media (max-width: 768px) {
    .sustain-row,
    .sustain-row--reversed {
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-5);
    }

    .sustain-row__media::before,
    .sustain-row__media::after {
        display: none;
    }

    .sustain-row__media img {
        height: 240px;
        border-radius: var(--radius-md);
    }
}