.about-page {
        background: #ffffff;
    }

    .about-shell .container {
        width: min(1600px, calc(100% - 160px));
    }

    .culture-section .container,
    .timeline-section .container,
    .cert-section .container,
    .brochure-section .container {
        width: min(1320px, calc(100% - 120px));
    }

    .about-page .section-title {
        margin-bottom: 0;
        font-size: 28px;
        letter-spacing: 1px;
        color: #1f2f3f;
    }

    .about-page .section-title::after {
        width: 42px;
        margin-top: 14px;
    }

    .about-shell,
    .culture-section,
    .timeline-section,
    .cert-section,
    .brochure-section {
        scroll-margin-top: 48px;
    }

    .about-shell {
        position: relative;
        min-height: clamp(560px, 49vw, 760px);
        overflow: hidden;
        background-color: #dce8f1 !important;
        background-position: center bottom !important;
        background-size: cover !important;
        background-repeat: no-repeat !important;
    }

    .about-intro-container {
        position: relative;
        z-index: 1;
        min-height: inherit;
        padding: clamp(68px, 7vw, 92px) 0 clamp(56px, 6vw, 84px);
        overflow: visible;
    }

    .about-top {
        display: grid;
        grid-template-columns: 136px minmax(0, 940px);
        gap: clamp(56px, 5vw, 92px);
        align-items: start;
        padding-top: clamp(18px, 3vw, 42px);
    }

    .side-menu {
        padding-top: 16px;
    }

    .side-menu a {
        display: block;
        padding: 10px 0 10px 18px;
        border-left: 2px solid rgba(58, 83, 102, 0.14);
        color: #6f8191;
        font-size: 13px;
        font-weight: 500;
        line-height: 2.1;
    }

    .side-menu a.active {
        color: #20b9ae;
        border-left-color: #20b9ae;
    }

    .intro-copy {
        max-width: 940px;
        padding-right: 0;
        background: transparent;
    }

    .intro-copy p {
        margin-bottom: 18px;
        color: #425464;
        font-size: 14px;
        line-height: 2.22;
    }

    .intro-copy p:last-child {
        margin-bottom: 0;
    }

    .culture-section {
        padding: 76px 0 92px;
        background: #ffffff;
    }

    .culture-grid {
        margin-top: 42px;
        display: grid;
        grid-template-columns: 420px minmax(0, 1fr);
        gap: 36px;
        align-items: center;
    }

    .culture-panel {
        min-height: 272px;
        padding: 38px 34px;
        background: linear-gradient(180deg, #fafcfd 0%, #f2f5f7 100%);
        border: 1px solid #edf2f4;
    }

    .culture-kicker {
        color: #9cadb7;
        font-size: 12px;
        letter-spacing: 2px;
    }

    .culture-panel h3 {
        margin-top: 14px;
        color: #273746;
        font-size: 20px;
        line-height: 1.6;
    }

    .culture-list {
        margin-top: 24px;
    }

    .culture-list li {
        position: relative;
        list-style: none;
        margin-bottom: 16px;
        padding-left: 20px;
        color: #617281;
        font-size: 13px;
        line-height: 1.9;
    }

    .culture-list li::before {
        content: "";
        position: absolute;
        left: 0;
        top: 8px;
        width: 8px;
        height: 8px;
        border-radius: 50%;
        background: #21bcb0;
        box-shadow: 0 0 0 4px rgba(33, 188, 176, 0.14);
    }

    .culture-image {
        min-height: 272px;
        background:
            linear-gradient(115deg, rgba(255, 255, 255, 0.76) 10%, rgba(255, 255, 255, 0.06) 56%),
            url('https://images.unsplash.com/photo-1470219556762-1771e7f9427d?auto=format&fit=crop&w=1400&q=80') center center / cover no-repeat;
        position: relative;
        overflow: hidden;
    }

    .culture-image::after {
        content: "";
        position: absolute;
        inset: 0;
        background:
            linear-gradient(145deg, rgba(255, 255, 255, 0.2) 0%, rgba(255, 255, 255, 0) 32%),
            linear-gradient(0deg, rgba(247, 198, 153, 0.18), rgba(247, 198, 153, 0.18));
        mix-blend-mode: screen;
    }

    .timeline-section {
        padding: 80px 0 96px;
        color: #ffffff;
        text-align: center;
        background:
            linear-gradient(180deg, rgba(17, 28, 47, 0.9), rgba(17, 28, 47, 0.72)),
            url('https://images.unsplash.com/photo-1519681393784-d120267933ba?auto=format&fit=crop&w=1600&q=80') center center / cover no-repeat;
    }

    .timeline-section .section-title {
        color: #ffffff;
    }

    .timeline-desc {
        max-width: 760px;
        margin: 18px auto 0;
        color: rgba(255, 255, 255, 0.72);
        font-size: 13px;
        line-height: 2;
    }

    .timeline-year {
        margin-top: 34px;
        color: #21d0c4;
        font-size: 42px;
        line-height: 1;
        font-weight: 700;
    }

    .timeline-axis {
        position: relative;
        display: flex;
        justify-content: center;
        gap: 32px;
        margin-top: 34px;
        padding-top: 22px;
        color: rgba(255, 255, 255, 0.7);
        font-size: 12px;
        flex-wrap: wrap;
    }

    .timeline-axis::before {
        content: "";
        position: absolute;
        left: 50%;
        top: 0;
        width: min(720px, 100%);
        height: 1px;
        background: rgba(94, 204, 197, 0.45);
        transform: translateX(-50%);
    }

    .timeline-axis span {
        position: relative;
        min-width: 42px;
    }

    .timeline-axis span::before {
        content: "";
        position: absolute;
        left: 50%;
        top: -26px;
        width: 8px;
        height: 8px;
        border-radius: 50%;
        background: rgba(94, 204, 197, 0.95);
        box-shadow: 0 0 0 4px rgba(94, 204, 197, 0.14);
        transform: translateX(-50%);
    }

    .cert-section {
        padding: 82px 0 88px;
        background: #ffffff;
    }

    .cert-stage {
        display: grid;
        grid-template-columns: repeat(5, 1fr);
        gap: 24px;
        margin-top: 42px;
    }

    .cert-card {
        padding: 28px 18px 22px;
        text-align: center;
        background: #ffffff;
        border-radius: 10px;
        box-shadow: 0 16px 32px rgba(17, 37, 53, 0.08);
    }

    .cert-visual {
        display: grid;
        place-items: center;
        height: 146px;
        margin-bottom: 18px;
        border: 1px solid #eef2f4;
        background: linear-gradient(180deg, #ffffff 0%, #f7fafb 100%);
        color: #2f7ece;
        font-size: 28px;
        font-weight: 700;
        letter-spacing: 1px;
    }

    .cert-visual.has-image {
        padding: 10px;
        background: #ffffff;
    }

    .cert-visual img {
        display: block;
        width: 100%;
        height: 100%;
        object-fit: contain;
    }

    .cert-card h3 {
        color: #334454;
        font-size: 14px;
        line-height: 1.8;
        font-weight: 500;
    }

    .cert-card p {
        margin-top: 6px;
        color: #97a5b1;
        font-size: 12px;
    }

    .slider-dots {
        display: flex;
        justify-content: center;
        gap: 8px;
        margin-top: 28px;
    }

    .slider-dots span {
        width: 26px;
        height: 2px;
        background: #d7e2e8;
    }

    .slider-dots span.active {
        background: #20b9ae;
    }

    .brochure-section {
        padding: 84px 0 92px;
        background: linear-gradient(180deg, #f9fcfc 0%, #ffffff 100%);
    }

    .brochure-feature {
        display: grid;
        grid-template-columns: minmax(0, 1fr) 280px;
        gap: 56px;
        align-items: center;
        padding: 0 42px 44px;
        border-bottom: 1px solid #ecf1f4;
    }

    .brochure-feature-copy h3 {
        color: #253544;
        font-size: 26px;
        line-height: 1.6;
    }

    .brochure-feature-copy p {
        max-width: 580px;
        margin-top: 14px;
        color: #677684;
        font-size: 13px;
        line-height: 2;
    }

    .brochure-actions {
        display: flex;
        gap: 10px;
        margin-top: 22px;
    }

    .brochure-btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-width: 86px;
        height: 28px;
        border: 1px solid #cad4da;
        background: #ffffff;
        color: #687887;
        font-size: 12px;
    }

    .brochure-cover {
        width: 220px;
        aspect-ratio: 4 / 5;
        margin-left: auto;
        border: 1px solid #edf2f4;
        background: linear-gradient(180deg, #ffffff 0%, #f1f6f8 100%);
        box-shadow: 0 18px 32px rgba(19, 34, 47, 0.08);
        overflow: hidden;
    }

    .brochure-cover.has-image {
        background: #ffffff;
    }

    .brochure-cover img {
        display: block;
        width: 100%;
        height: 100%;
        object-fit: cover;
    }

    .brochure-cover.featured {
        background:
            radial-gradient(circle at 86% 22%, rgba(0, 181, 168, 0.28) 0%, rgba(0, 181, 168, 0) 18%),
            linear-gradient(180deg, #ffffff 0%, #f5fbfb 100%);
        position: relative;
    }

    .brochure-cover.featured::before {
        content: "";
        position: absolute;
        inset: 16px;
        border: 8px solid #f8fbfc;
        border-right-width: 18px;
        border-radius: 2px;
        background:
            radial-gradient(circle at 22% 28%, rgba(96, 168, 230, 0.2) 0%, rgba(96, 168, 230, 0) 18%),
            linear-gradient(180deg, #ffffff, #f4f8fa);
    }

    .brochure-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 34px 26px;
        margin-top: 38px;
        padding: 0 42px;
    }

    .brochure-card {
        padding: 18px 18px 14px;
        background: #ffffff;
        box-shadow: 0 14px 30px rgba(17, 37, 53, 0.05);
    }

    .brochure-date {
        color: #a0adb8;
        font-size: 11px;
    }

    .brochure-card .brochure-cover {
        width: 100%;
        margin: 12px 0 14px;
    }

    .brochure-card h3 {
        min-height: 48px;
        color: #2d3d4d;
        font-size: 14px;
        line-height: 1.7;
        font-weight: 500;
    }

    .brochure-card .brochure-actions {
        margin-top: 12px;
    }

    .brochure-cover.variant-a {
        background:
            radial-gradient(circle at 80% 18%, rgba(61, 170, 241, 0.22) 0%, rgba(61, 170, 241, 0) 18%),
            linear-gradient(180deg, #ffffff 0%, #f5f9fb 100%);
    }

    .brochure-cover.variant-b {
        background:
            linear-gradient(180deg, rgba(100, 207, 156, 0.22), rgba(100, 207, 156, 0.04)),
            linear-gradient(180deg, #ffffff 0%, #f3faf6 100%);
    }

    .brochure-cover.variant-c {
        background:
            linear-gradient(180deg, rgba(148, 216, 175, 0.22), rgba(148, 216, 175, 0.05)),
            linear-gradient(180deg, #ffffff 0%, #f6fbf8 100%);
    }

    .action-center {
        margin-top: 28px;
        text-align: center;
    }

    @media (max-width: 1440px) {
        .about-shell .container {
            width: calc(100% - 80px);
        }
    }

    @media (max-width: 1280px) {
        .about-shell .container {
            width: calc(100% - 80px);
        }

        .culture-section .container,
        .timeline-section .container,
        .cert-section .container,
        .brochure-section .container {
            width: calc(100% - 64px);
        }

        .about-intro-container {
            padding-top: 60px;
            padding-bottom: 70px;
        }

        .cert-stage {
            grid-template-columns: repeat(3, 1fr);
        }
    }

    @media (max-width: 1200px) {
        .about-shell .container {
            width: calc(100% - 64px);
        }
    }

    @media (max-width: 980px) {
        .about-shell {
            min-height: 0;
            background-position: center center !important;
        }

        .about-shell .container {
            width: calc(100% - 64px);
        }

        .culture-section .container,
        .timeline-section .container,
        .cert-section .container,
        .brochure-section .container {
            width: calc(100% - 48px);
        }

        .about-top,
        .culture-grid,
        .brochure-feature {
            grid-template-columns: 1fr;
            gap: 28px;
        }

        .side-menu {
            display: flex;
            gap: 18px;
            padding-top: 0;
            flex-wrap: wrap;
        }

        .side-menu a {
            padding: 0 0 6px;
            border-left: 0;
            border-bottom: 2px solid transparent;
        }

        .side-menu a.active {
            border-bottom-color: #20b9ae;
        }

        .intro-copy {
            max-width: none;
        }

        .about-intro-container {
            padding: 40px 0 48px;
        }

        .about-top {
            gap: 24px;
            padding-top: 0;
        }

        .intro-copy p {
            font-size: 13px;
            line-height: 2;
        }

        .brochure-feature,
        .brochure-grid {
            padding-left: 0;
            padding-right: 0;
        }

        .brochure-cover {
            margin-left: 0;
        }

    }

    @media (max-width: 760px) {
        .about-shell .container {
            width: calc(100% - 32px);
        }

        .culture-section .container,
        .timeline-section .container,
        .cert-section .container,
        .brochure-section .container {
            width: calc(100% - 28px);
        }

        .cert-stage,
        .brochure-grid {
            grid-template-columns: 1fr;
        }

        .timeline-axis {
            gap: 18px;
        }

        .brochure-actions {
            flex-wrap: wrap;
        }

        .about-intro-container {
            padding: 30px 0 36px;
        }

        .side-menu {
            gap: 12px 16px;
        }

        .side-menu a {
            font-size: 12px;
        }

        .intro-copy p {
            font-size: 12px;
            line-height: 1.95;
        }
    }

    @media (max-width: 860px) {
        .about-shell,
        .culture-section,
        .timeline-section,
        .cert-section,
        .brochure-section {
            scroll-margin-top: 36px;
        }

        .about-shell .container {
            width: calc(100% - 32px);
        }
    }

    @media (max-width: 560px) {
        .about-shell .container {
            width: calc(100% - 24px);
        }
    }