@media screen and (max-width: 568px) {
    #introduction .hero {
        min-height: 700px;
    }

    #introduction .hero-visual img {
        object-position: 63% center;
    }

    #introduction .hero-shade {
        background:
            linear-gradient(0deg, rgba(2, 4, 6, 0.96) 0%, rgba(2, 4, 6, 0.58) 58%, rgba(2, 4, 6, 0.16) 100%),
            linear-gradient(90deg, rgba(2, 4, 6, 0.72), transparent);
    }

    #introduction .hero-copy {
        bottom: 52px;
        left: 24px;
        max-width: calc(100% - 48px);
        top: auto;
        transform: none;
    }

    #introduction .hero-copy .eyebrow {
        margin-bottom: 16px;
    }

    #introduction .hero h1 {
        font-size: 2rem;
        line-height: 1.58;
        margin-bottom: 18px;
    }

    #introduction .hero h1.hero-quote {
        font-size: 1.72rem;
        line-height: 2.55rem;
    }

    #introduction .hero h1 cite {
        font-size: 0.84em;
        margin-top: 8px;
    }

    #introduction .hero .lead {
        font-size: 0.94rem;
        line-height: 1.9rem;
    }

    #introduction .hero-visual figcaption {
        display: none;
    }

    #introduction main {
        padding: 0 24px 64px;
    }

    #introduction .chapter,
    #introduction .diagram-section,
    #introduction .equipment-section,
    #introduction .periods-section,
    #introduction .philosophy {
        display: block;
        padding: 46px 0 64px;
    }

    #introduction .chapter-head {
        margin-bottom: 34px;
    }

    #introduction .chapter-head .section-label,
    #introduction .cc500-copy .section-label {
        margin-bottom: 14px;
    }

    #introduction .chapter-head h2,
    #introduction .cc500-copy h2 {
        font-size: 1.65rem;
        line-height: 2.35rem;
    }

    #introduction .chapter-head > p:last-child,
    #introduction .chapter-body > p,
    #introduction .cc500-copy > p:last-child {
        font-size: 0.94rem;
        line-height: 2rem;
    }

    #introduction .prose-columns {
        column-count: 1;
    }

    #introduction .prose-columns p + p {
        margin-top: 20px;
    }

    #introduction .world-context {
        gap: 10px 12px;
        grid-column: auto;
        grid-template-columns: 88px minmax(0, 1fr);
        margin-top: 30px;
        padding: 15px 16px;
    }

    #introduction .world-context span {
        font-size: 0.62rem;
    }

    #introduction .world-context b {
        font-size: 0.75rem;
        line-height: 1.35rem;
    }

    #introduction .diagram-gallery {
        display: block;
        justify-self: stretch;
        margin: 0 -24px;
        width: auto;
    }

    #introduction .diagram-figure {
        margin: 0;
        padding: 16px;
    }

    #introduction .diagram-figure + .diagram-figure {
        margin-top: 14px;
    }

    #introduction figure figcaption {
        font-size: 0.62rem;
        line-height: 1.35rem;
    }

    #introduction .process-strip {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        margin-top: 24px;
    }

    #introduction .process-strip li {
        min-height: 230px;
        padding: 15px 14px 18px;
    }

    #introduction .process-strip li:last-child {
        grid-column: 1 / -1;
    }

    #introduction .process-strip span {
        font-size: 0.92rem;
        line-height: 1.55rem;
    }

    #introduction .process-strip em {
        font-size: 0.76rem;
        line-height: 1.55rem;
    }

    #introduction .collaboration .chapter-body {
        display: block;
    }

    #introduction .collaboration .large-copy {
        font-size: 1.3rem;
        line-height: 2rem;
        margin-bottom: 24px;
    }

    #introduction .cc500-feature {
        display: block;
        margin: 0 -24px;
    }

    #introduction .cc500-feature figure {
        min-height: 0;
    }

    #introduction .cc500-feature figure img {
        height: auto;
    }

    #introduction .cc500-copy {
        padding: 38px 24px 52px;
    }

    #introduction .cc500-copy h2 {
        margin-bottom: 22px;
    }

    #introduction .equipment-grid {
        display: block;
    }

    #introduction .equipment-section > .chapter-head > p:last-child {
        font-size: 1.06rem;
    }

    #introduction .equipment-grid section {
        min-height: 0;
        padding: 20px 18px 24px;
    }

    #introduction .equipment-grid h3 {
        font-size: 1.12rem;
        margin: 12px 0 8px;
    }

    #introduction .equipment-grid p,
    #introduction .equipment-note {
        font-size: 0.94rem;
        line-height: 1.9rem;
    }

    #introduction .equipment-note {
        margin-top: 22px;
        padding: 10px 14px;
    }

    #introduction .studio-panorama {
        margin: 0 -24px;
    }

    #introduction .studio-panorama img {
        min-height: 310px;
        object-fit: cover;
    }

    #introduction .studio-panorama figcaption {
        left: 24px;
    }

    #introduction .period-grid {
        display: block;
    }

    #introduction .period-grid li {
        border-bottom: 1px solid var(--hairline);
        padding: 22px 18px 26px;
    }

    #introduction .period-grid time {
        font-size: 1.35rem;
    }

    #introduction .period-grid h3 {
        font-size: 0.95rem;
        margin: 12px 0;
    }

    #introduction .period-grid .period-copy {
        font-size: 0.82rem;
        line-height: 1.75rem;
    }

    #introduction .philosophy-head {
        display: block;
    }

    #introduction .philosophy-head .section-label {
        display: block;
        margin-bottom: 18px;
    }

    #introduction .philosophy-head h2 {
        font-size: 1.65rem;
        line-height: 2.4rem;
    }

    #introduction .philosophy-essay {
        column-count: 1;
        column-rule: 0;
    }

    #introduction .philosophy-essay p {
        font-size: 0.94rem;
        line-height: 2rem;
        margin-bottom: 1.5rem;
    }

    #introduction .philosophy-essay .philosophy-thesis {
        padding-left: 16px;
    }

    #introduction .philosophy-essay .philosophy-author {
        font-size: 1.02rem;
        margin-top: 30px;
    }

}

@media screen and (max-width: 568px) {
    #introduction .hero {
        min-height: 650px;
    }

    #introduction .hero-copy {
        bottom: 38px;
        left: 24px;
        text-shadow: 0 2px 7px #000, 0 1px 2px #000;
    }

    #introduction .hero h1.hero-quote {
        font-size: 1.65rem;
    }

    #introduction .period-grid li {
        min-height: 0;
    }

    #introduction .diagram-gallery {
        width: auto;
    }

    #introduction .cc500-feature {
        margin: 0;
    }

    #introduction .cc500-feature figure,
    #introduction .studio-panorama {
        width: 100%;
    }

    #introduction .equipment-grid {
        display: block;
    }

    #introduction .philosophy-essay p {
        font-size: 0.94rem;
        line-height: 2rem;
    }
}
@media screen and (max-width: 568px) {
    #introduction section.container {
        box-sizing: border-box;
        padding: 32px;
        width: 100%;
    }

    #introduction section.container section.image-container {
        display: block;
        background-image: url("../images/sp_image01.jpg");
        width: 256px;
        height: 288px;
        margin-bottom: 32px;
    }

    #introduction section.container p {
        font-size: 1.0rem;
        letter-spacing: 0;
        line-height: 2.15rem;
        margin-bottom: 24px;
    }

    #introduction .introduction-header {
        margin-bottom: 40px;
    }

    #introduction .introduction-header h1 {
        font-size: 1.6rem;
        line-height: 2.4rem;
    }

    #introduction .introduction-header .eyebrow {
        font-size: 0.8rem;
        line-height: 1.2rem;
        margin-bottom: 12px;
    }

    #introduction .introduction-section {
        margin-bottom: 64px;
    }

    #introduction .introduction-section h2 {
        font-size: 1.25rem;
        line-height: 2.1rem;
        margin-bottom: 24px;
        padding-left: 14px;
    }

    #introduction .introduction-part {
        margin-bottom: 88px;
    }

    #introduction .part-label {
        font-size: 0.85rem;
        line-height: 1.4rem;
        margin-bottom: 48px;
        padding-bottom: 12px;
    }

    #introduction .period {
        margin: 0 0 64px 4px;
        padding-left: 18px;
    }

    #introduction .period h3 {
        font-size: 1.12rem;
        line-height: 1.9rem;
        margin-bottom: 24px;
    }

    #introduction .period h3 small {
        display: block;
        font-size: 0.8rem;
        margin-left: 28px;
    }

    #introduction .equipment-list li {
        font-size: 0.95rem;
        line-height: 2rem;
        padding: 16px 8px 16px 26px;
    }

    #introduction .equipment-list li::before {
        left: 4px;
        top: 16px;
    }

    #introduction .future-part,
    #introduction .final-section {
        margin-bottom: 24px;
    }
}