@charset "UTF-8";

/* ==========================================================================
   レイヤー定義
   foundation : リセット・変数・base
   layout     : l-* （ページ骨格）
   component  : c-* （再利用部品）
   project    : p-* （ページ固有）
   utility    : u-* （単一目的）
   ========================================================================== */
@layer foundation, layout, component, project, utility;

/* ==========================================================================
   foundation / variables
   ========================================================================== */
@layer foundation {
    :root {
        /* color */
        --color-text: #1a1a1a;
        --color-text-sub: #666;
        --color-bg: #fff;
        --color-bg-alt: #f7f5f0;
        --color-accent: #8b6f47;
        --color-border: #e0ddd6;
        --color-cta: #00264A;
        --color-cta-hover: #001833;
        --color-cool: #e8f1f7;
        --color-cool-hover: #d5e6f0;
        --color-footer-bg: #1c3863;
        --color-footer-text: #fff;

        /* size */
        --header-h: 88px;

        /* font-family */
        --font-base: "Noto Sans JP", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", YuGothic, "Meiryo", sans-serif;
        --font-en: "Oswald", "Noto Sans JP", sans-serif;

        /* font-size */
        --fs-xs: 12px;
        --fs-sm: 14px;
        --fs-base: 16px;
        --fs-md: 18px;
        --fs-lg: 24px;
        --fs-xl: 32px;
        --fs-xxl: 48px;

        /* spacing */
        --space-xs: 4px;
        --space-sm: 8px;
        --space-md: 16px;
        --space-lg: 32px;
        --space-xl: 64px;
        --space-xxl: 96px;

        /* layout */
        --container-max: 1200px;
        --container-pad: 24px;

        /* line-height */
        --lh-tight: 1.3;
        --lh-base: 1.7;
        --lh-loose: 2;
    }

    /* reset (minimal) */
    *, *::before, *::after {
        box-sizing: border-box;
    }
    body, h1, h2, h3, h4, h5, h6, p, ul, ol, dl, dd, figure, blockquote {
        margin: 0;
    }
    ul, ol {
        padding: 0;
        list-style: none;
    }
    img {
        max-width: 100%;
        height: auto;
        display: block;
    }
    a {
        color: inherit;
        text-decoration: none;
    }
    button {
        font: inherit;
        cursor: pointer;
        background: none;
        border: 0;
        padding: 0;
        color: inherit;
    }

    body {
        font-family: var(--font-base);
        font-size: var(--fs-base);
        line-height: var(--lh-base);
        color: var(--color-text);
        background: var(--color-bg);
        -webkit-font-smoothing: antialiased;
        text-rendering: optimizeLegibility;
    }
}

/* ==========================================================================
   layout
   ========================================================================== */
@layer layout {
    .l-container {
        max-width: var(--container-max);
        margin-inline: auto;
        padding-inline: var(--container-pad);
    }

    .l-main {
        min-height: 50vh;
    }

    /* header */
    .l-header {
        position: relative;
        height: var(--header-h);
        background: var(--color-bg);
        z-index: 100;
    }
    .l-header__inner {
        height: 100%;
        padding-inline: 40px;
        display: flex;
        align-items: center;
        gap: var(--space-lg);
    }
    .l-header__logo {
        flex-shrink: 0;
        display: flex;
        align-items: center;
    }
    .l-header__logo img {
        height: 48px;
        width: auto;
    }
    .l-header__logo-text {
        font-family: var(--font-base);
        font-size: 22px;
        font-weight: 700;
        letter-spacing: 0.05em;
    }
    .l-header__nav {
        margin-left: auto;
    }
    .l-header__menu {
        display: flex;
        gap: 32px;
        align-items: center;
    }
    .l-header__menu a {
        font-family: var(--font-base);
        font-size: 16px;
        letter-spacing: 0.08em;
        transition: opacity 0.2s;
    }
    .l-header__menu a:hover {
        opacity: 0.6;
    }
    .l-header__cta {
        flex-shrink: 0;
    }
    .l-header__burger {
        display: none;
    }

    /* footer */
    .l-footer {
        background: var(--color-footer-bg);
        color: var(--color-footer-text);
        padding: 56px 0 24px;
    }
    .l-footer a {
        color: var(--color-footer-text);
        transition: opacity 0.2s;
    }
    .l-footer a:hover {
        opacity: 0.7;
    }
    .l-footer__inner {
        max-width: 1280px;
        margin-inline: auto;
        padding-inline: 40px;
    }
    .l-footer__grid {
        display: grid;
        grid-template-columns: 1fr auto;
        gap: var(--space-xl);
        margin-bottom: var(--space-xl);
    }
    .l-footer__brand {
        display: flex;
        align-items: center;
        gap: 12px;
        margin-bottom: var(--space-md);
    }
    .l-footer__brand img {
        height: 40px;
        width: auto;
        filter: brightness(0) invert(1);
    }
    .l-footer__info {
        font-size: var(--fs-xs);
        line-height: 1.8;
        letter-spacing: 0.05em;
    }
    .l-footer__menu {
        display: flex;
        gap: 28px;
        align-items: center;
    }
    .l-footer__menu a {
        font-family: var(--font-base);
        font-size: var(--fs-sm);
        letter-spacing: 0.08em;
        white-space: nowrap;
    }
    .l-footer__copyright {
        text-align: center;
        font-size: 11px;
        letter-spacing: 0.1em;
        padding-top: var(--space-md);
        border-top: 1px solid rgba(255, 255, 255, 0.15);
        color: rgba(255, 255, 255, 0.8);
    }
}

/* ==========================================================================
   component
   ========================================================================== */
@layer component {
    /* button */
    .c-button {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 10px;
        padding: 14px 28px;
        background: var(--color-text);
        color: var(--color-bg);
        font-size: var(--fs-sm);
        letter-spacing: 0.1em;
        transition: background 0.2s, opacity 0.2s;
        line-height: 1;
    }
    .c-button:hover {
        opacity: 0.85;
    }
    .c-button--contact {
        background: var(--color-cta);
        border-radius: 999px;
        padding: 16px 32px;
        font-family: var(--font-base);
        font-size: 16px;
    }
    .c-button--contact:hover {
        background: var(--color-cta-hover);
        opacity: 1;
    }
    .c-button__icon {
        display: block;
    }

    /* button - soft (各セクションの「〇〇はこちら」用) */
    .c-button--soft {
        background: var(--color-cta);
        color: #fff;
        border-radius: 4px;
        padding: 14px 36px;
        font-family: var(--font-base);
        font-size: 15px;
        letter-spacing: 0.08em;
        line-height: 1;
    }
    .c-button--soft:hover {
        background: var(--color-cta-hover);
        opacity: 1;
    }

    /* section head (英大見出し + 日本語サブ) */
    .c-section-head {
        display: flex;
        align-items: baseline;
        gap: 16px;
        margin-bottom: 24px;
    }
    .c-section-head__en {
        font-family: var(--font-en);
        font-size: clamp(36px, 5vw, 60px);
        font-weight: 600;
        letter-spacing: 0.04em;
        line-height: 1;
        color: var(--color-text);
    }
    .c-section-head__ja {
        font-family: var(--font-base);
        font-size: clamp(14px, 1.4vw, 18px);
        font-weight: 700;
        color: var(--color-cta);
        letter-spacing: 0.08em;
    }

    /* section head (sub variant: 中央寄せ・英小+日大スタック) */
    .c-section-head--sub {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 6px;
        margin-bottom: var(--space-xl);
    }
    .c-section-head--sub .c-section-head__en {
        order: -1;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 300px;
        max-width: 100%;
        padding: 8px 16px;
        background: #E9F4FF;
        border-radius: 20px;
        font-size: var(--fs-sm);
        font-weight: 600;
        letter-spacing: 0.15em;
        color: var(--color-cta);
    }
    .c-section-head--sub .c-section-head__ja {
        font-size: clamp(22px, 2.6vw, 32px);
        font-weight: 700;
        color: var(--color-text);
    }

    /* card - media (メディアセクション用ブログカード) */
    .c-card--media {
        background: transparent;
    }
    .c-card--media .c-card__thumb {
        aspect-ratio: 16 / 9;
        border-radius: 4px;
    }
    .c-card--media .c-card__body {
        padding: var(--space-md) 0 20px 10px;
    }
    .c-card--media .c-card__title {
        font-family: var(--font-base);
        font-size: var(--fs-md);
        line-height: 1.4;
        margin-top: 0;
    }
    .c-card--media .c-card__excerpt {
        font-size: var(--fs-xs);
        color: var(--color-text-sub);
        margin-top: 8px;
        line-height: 1.6;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .c-card--placeholder .c-card__thumb {
        background: linear-gradient(135deg, #c8e0ec 0%, #a8c8db 100%);
    }

    /* card - サムネ未設定時のロゴプレースホルダ */
    .c-card__thumb--logo {
        background: #F9FAFC;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 12% 16%;
    }
    .c-card__thumb--logo img {
        width: 100%;
        max-width: 220px;
        height: auto;
        object-fit: contain;
        transition: none;
    }
    .c-card__link:hover .c-card__thumb--logo img {
        transform: none;
    }

    /* card - blog (BLOG アーカイブ用 タイトル→日付) */
    .c-card--blog .c-card__thumb {
        aspect-ratio: 16 / 9;
        border-radius: 4px;
    }
    .c-card--blog .c-card__body {
        padding: 12px 0 0;
    }
    .c-card--blog .c-card__title {
        margin-top: 0;
        font-family: var(--font-base);
        font-size: var(--fs-sm);
        font-weight: 500;
        line-height: 1.5;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .c-card--blog .c-card__date {
        display: block;
        margin-top: 6px;
        font-size: var(--fs-xs);
        color: var(--color-text-sub);
    }

    /* pagination */
    .c-pagination {
        display: flex;
        justify-content: center;
        align-items: center;
        gap: 6px;
        flex-wrap: wrap;
    }
    .c-pagination .page-numbers {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-width: 32px;
        height: 32px;
        padding: 0 8px;
        background: var(--color-cta);
        color: #fff;
        font-family: var(--font-en);
        font-size: 14px;
        font-weight: 500;
        line-height: 1;
        text-decoration: none;
        transition: background 0.2s, opacity 0.2s;
    }
    .c-pagination a.page-numbers:hover {
        background: var(--color-cta-hover);
        opacity: 1;
    }
    .c-pagination .page-numbers.current {
        background: var(--color-cta-hover);
        cursor: default;
    }
    .c-pagination .page-numbers.dots {
        background: transparent;
        color: var(--color-text-sub);
        min-width: auto;
        padding: 0 4px;
    }

    /* loadmore */
    .c-loadmore {
        display: block;
        margin: var(--space-xl) auto 0;
        padding: 16px 48px;
        background: transparent;
        border: 1px solid var(--color-text);
        color: var(--color-text);
        font-size: var(--fs-sm);
        letter-spacing: 0.1em;
        transition: background 0.2s, color 0.2s;
    }
    .c-loadmore:hover {
        background: var(--color-text);
        color: var(--color-bg);
    }

    /* card */
    .c-card {
        background: transparent;
    }
    .c-card__link {
        display: block;
    }
    .c-card__thumb {
        aspect-ratio: 16 / 10;
        overflow: hidden;
        background: var(--color-bg-alt);
    }
    .c-card__thumb img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.4s;
    }
    .c-card__link:hover .c-card__thumb img {
        transform: scale(1.04);
    }
    .c-card__body {
        padding: var(--space-md) 0 20px 10px;
        background: transparent;
    }
    .c-card__date {
        font-size: var(--fs-xs);
        color: var(--color-text-sub);
        letter-spacing: 0.08em;
    }
    .c-card__title {
        font-size: var(--fs-md);
        line-height: var(--lh-tight);
        margin-top: var(--space-xs);
    }

    /* card - news variant (横並びリスト風) */
    .c-card--news {
        display: grid;
        grid-template-columns: auto 1fr;
        gap: var(--space-md);
        padding: var(--space-md) 0;
        border-bottom: 1px solid var(--color-border);
    }
    .c-card--news .c-card__link {
        display: grid;
        grid-template-columns: auto 1fr;
        gap: var(--space-md);
        align-items: center;
    }
    .c-card--news .c-card__title {
        margin-top: 0;
        font-size: var(--fs-base);
    }
}

/* ==========================================================================
   project (ページ固有のスタイルはここに追加していく)
   ========================================================================== */
@layer project {
    /* HOME メインビジュアル */
    .p-mv {
        position: relative;
        width: 100%;
        height: calc(100vh - var(--header-h));
        min-height: 480px;
        max-height: 820px;
        overflow: hidden;
        background: var(--color-bg-alt);
    }
    .p-mv__slider {
        position: absolute;
        inset: 0;
    }
    .p-mv__slides {
        position: absolute;
        inset: 0;
    }
    .p-mv__slide {
        position: absolute;
        inset: 0;
        opacity: 0;
        transition: opacity 1.2s ease;
        pointer-events: none;
    }
    .p-mv__slide.is-active {
        opacity: 1;
        pointer-events: auto;
    }
    .p-mv__slide img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }
    .p-mv__placeholder {
        width: 100%;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--color-text-sub);
        font-size: var(--fs-sm);
    }

    .p-mv__copy {
        position: absolute;
        left: 5%;
        bottom: 12%;
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
        z-index: 2;
        max-width: 90%;
    }
    .p-mv__copyline {
        display: inline-block;
        background: rgba(255, 255, 255, 0.96);
        padding: 14px 28px;
        font-family: var(--font-base);
        font-size: clamp(28px, 4vw, 52px);
        line-height: 1.4;
        letter-spacing: 0.03em;
        color: var(--color-text);
        width: fit-content;
    }

    .p-mv__dots {
        position: absolute;
        bottom: 24px;
        left: 50%;
        transform: translateX(-50%);
        display: flex;
        gap: 12px;
        z-index: 3;
    }
    .p-mv__dot {
        width: 10px;
        height: 10px;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.5);
        border: 1px solid rgba(255, 255, 255, 0.8);
        transition: background 0.2s, transform 0.2s;
    }
    .p-mv__dot:hover {
        transform: scale(1.2);
    }
    .p-mv__dot.is-active {
        background: #fff;
    }

    /* ===== 共通セクション ===== */
    .p-section {
        padding: var(--space-xxl) 0;
    }
    .p-section--cool {
        background: var(--color-cool);
    }
    .p-section__lead {
        font-family: var(--font-base);
        font-size: var(--fs-sm);
        line-height: var(--lh-loose);
        margin-bottom: var(--space-xl);
        color: var(--color-text);
    }
    .p-section__image {
        margin: 0 0 var(--space-xl);
        overflow: hidden;
    }
    .p-section__image img {
        width: 100%;
        height: auto;
        display: block;
    }
    .p-section__action {
        margin-top: var(--space-lg);
    }

    /* ===== ビジョン ===== */
    .p-vision__body {
        font-family: var(--font-base);
        font-size: var(--fs-base);
        line-height: var(--lh-loose);
    }

    /* ===== MEDIA ===== */
    .p-media__blog {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-lg);
        margin-bottom: var(--space-xl);
    }
    .p-media__videos {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-lg);
        margin: var(--space-xxl) 0 var(--space-lg);
    }
    .p-media__video {
        position: relative;
        overflow: hidden;
        border-radius: 8px;
        background: #000;
        aspect-ratio: 16 / 9;
    }
    .p-media__video img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        display: block;
        transition: transform 0.4s;
    }
    .p-media__video-trigger {
        position: absolute;
        inset: 0;
        width: 100%;
        height: 100%;
        padding: 0;
        border: 0;
        background: transparent;
        cursor: pointer;
        display: block;
    }
    .p-media__video-trigger:hover img {
        transform: scale(1.04);
    }
    .p-media__play-icon {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        width: 64px;
        height: 64px;
        pointer-events: none;
        transition: transform 0.2s;
    }
    .p-media__play-icon svg {
        width: 100%;
        height: 100%;
        display: block;
    }
    .p-media__video-trigger:hover .p-media__play-icon {
        transform: translate(-50%, -50%) scale(1.1);
    }
    .p-media__iframe {
        position: absolute;
        inset: 0;
        width: 100%;
        height: 100%;
        border: 0;
        display: block;
    }

    /* ===== NEWS ===== */
    .p-news__list {
        margin-bottom: var(--space-lg);
    }
    .p-news__item {
        display: grid;
        grid-template-columns: 120px 1fr;
        gap: var(--space-md);
        align-items: center;
        padding: var(--space-md) 0;
        border-bottom: 1px solid var(--color-border);
    }
    .p-news__date {
        font-family: var(--font-base);
        font-size: var(--fs-sm);
        color: var(--color-text);
        letter-spacing: 0.05em;
    }
    .p-news__title {
        font-family: var(--font-base);
        font-size: var(--fs-sm);
        color: var(--color-text);
        line-height: 1.5;
        transition: opacity 0.2s;
    }
    a.p-news__title:hover {
        opacity: 0.6;
    }
    .p-news__item--placeholder .p-news__title {
        color: var(--color-text-sub);
    }

    /* ===== ページ共通ヘッダー ===== */
    .p-page-head {
        padding: var(--space-xl) 0 0;
    }

    /* ===== WORKS: 事業内容 ===== */
    .p-works-business {
        padding: var(--space-xxl) 0;
    }
    .p-works-business__list {
        display: flex;
        flex-direction: column;
        gap: var(--space-xl);
    }
    .p-works-business__item {
        display: grid;
        grid-template-columns: 1.1fr 1fr;
        align-items: center;
        gap: 0;
    }
    .p-works-business__item--reverse .p-works-business__image {
        order: 2;
    }
    .p-works-business__item--reverse .p-works-business__text {
        order: 1;
        margin-left: 0;
        margin-right: -40px;
    }
    .p-works-business__image {
        position: relative;
        z-index: 1;
    }
    .p-works-business__image img {
        width: 100%;
        height: auto;
        border-radius: 4px;
        aspect-ratio: 4 / 3;
        object-fit: cover;
        display: block;
    }
    .p-works-business__text {
        background: #fff;
        padding: var(--space-lg);
        border-radius: 12px;
        box-shadow: 0 6px 24px rgba(0, 38, 74, 0.08);
        margin-left: -40px;
        position: relative;
        z-index: 2;
    }
    .p-works-business__title {
        font-size: var(--fs-lg);
        font-weight: 700;
        color: var(--color-text);
        margin-bottom: var(--space-md);
    }
    .p-works-business__body {
        font-size: var(--fs-sm);
        line-height: var(--lh-loose);
        color: var(--color-text);
    }

    /* ===== WORKS: 下水道関連の工法 ===== */
    .p-works-method {
        padding: var(--space-xxl) 0;
        background: #F9FAFC;
    }
    .p-works-method__panel {
        background: #fff;
        border-radius: 12px;
        padding: var(--space-lg);
        box-shadow: 0 6px 24px rgba(0, 38, 74, 0.06);
    }
    .p-works-method__tabs {
        display: flex;
        flex-wrap: wrap;
        gap: 0;
        border-bottom: 1px solid var(--color-border);
        margin-bottom: var(--space-lg);
    }
    .p-works-method__tab {
        padding: 14px 24px;
        background: transparent;
        border: 0;
        border-bottom: 2px solid transparent;
        color: var(--color-text-sub);
        font-family: var(--font-base);
        font-size: var(--fs-sm);
        font-weight: 500;
        line-height: 1;
        cursor: pointer;
        transition: color 0.2s, border-color 0.2s, background 0.2s;
        margin-bottom: -1px;
    }
    .p-works-method__tab:hover {
        color: var(--color-cta);
    }
    .p-works-method__tab.is-active {
        color: var(--color-cta);
        border-bottom-color: var(--color-cta);
        font-weight: 700;
    }
    .p-works-method__tab-label.is-sp {
        display: none;
    }
    .p-works-method__content {
        display: none;
    }
    .p-works-method__content.is-active {
        display: block;
    }
    .p-works-method__title {
        font-size: var(--fs-lg);
        font-weight: 700;
        text-align: center;
        margin-bottom: var(--space-md);
        color: var(--color-text);
    }
    .p-works-method__lead {
        max-width: 720px;
        margin: 0 auto var(--space-lg);
        font-size: var(--fs-sm);
        line-height: var(--lh-loose);
        color: var(--color-text);
    }
    .p-works-method__lead p {
        margin-bottom: 0.5em;
    }
    .p-works-method__video {
        aspect-ratio: 16 / 9;
        max-width: 720px;
        margin: 0 auto var(--space-lg);
        background: #000;
        border-radius: 8px;
        overflow: hidden;
    }
    .p-works-method__video iframe {
        width: 100%;
        height: 100%;
        border: 0;
        display: block;
    }
    .p-works-method__action {
        text-align: center;
        margin-top: var(--space-lg);
    }

    /* ===== WORKS: 施工実績 ===== */
    .p-works-achievement {
        padding: var(--space-xxl) 0;
    }
    .p-works-achievement__grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-xl) var(--space-lg);
    }
    .p-works-achievement__item {
        background: transparent;
    }
    .p-works-achievement__thumb {
        margin: 0 0 12px;
        aspect-ratio: 405 / 225;
        overflow: hidden;
        border-radius: 4px;
        background: var(--color-bg-alt);
    }
    .p-works-achievement__thumb img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        display: block;
    }
    .p-works-achievement__title {
        font-size: clamp(14px, 2vw, 20px);
        font-weight: 700;
        line-height: 1.5;
        margin-bottom: 6px;
        color: var(--color-text);
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .p-works-achievement__meta {
        font-size: var(--fs-xs);
        line-height: 1.7;
        color: var(--color-text-sub);
    }
    .p-works-achievement__item.is-hidden {
        display: none;
    }
    .p-works-achievement__more {
        text-align: center;
        margin-top: var(--space-xl);
    }

    /* ===== ABOUT (会社概要 - 定義リスト) ===== */
    .p-about {
        padding: var(--space-xxl) 0;
    }
    .p-about__list {
        max-width: 880px;
        margin: 0 auto;
    }
    .p-about__row {
        display: grid;
        grid-template-columns: 240px 1fr;
        gap: var(--space-md);
        padding: 18px 8px;
        border-bottom: 1px solid var(--color-border);
    }
    .p-about__row:first-child {
        border-top: 1px solid var(--color-border);
    }
    .p-about__label {
        font-weight: 700;
        color: var(--color-text);
        font-size: var(--fs-sm);
    }
    .p-about__value {
        font-size: var(--fs-sm);
        line-height: 1.7;
        color: var(--color-text);
    }
    .p-about__value p {
        margin: 0;
    }
    .p-about__value p + p {
        margin-top: 4px;
    }
    /* ===== HISTORY (沿革) ===== */
    .p-history {
        padding: var(--space-xxl) 0;
        background: #F9FAFC;
    }
    .p-history__list {
        max-width: 880px;
        margin: var(--space-xl) auto 0;
    }
    .p-history__item {
        position: relative;
        padding-bottom: 36px;
    }
    .p-history__item:last-child {
        padding-bottom: 0;
    }
    .p-history__item:not(:last-child)::after {
        content: '';
        position: absolute;
        left: 0;
        bottom: 6px;
        width: 2px;
        height: 22px;
        background: var(--color-cta);
    }
    .p-history__year {
        display: block;
        font-family: var(--font-en);
        font-size: clamp(24px, 3vw, 32px);
        font-weight: 700;
        color: var(--color-cta);
        line-height: 1;
        margin-bottom: 8px;
    }
    .p-history__desc {
        font-size: clamp(18px, 2.3vw, 24px);
        line-height: 1.7;
        color: var(--color-text);
    }
    .p-history__desc p {
        margin: 0;
    }
    .p-history__desc p + p {
        margin-top: 2px;
    }

    /* ===== BLOG SINGLE (ブログ詳細) ===== */
    .p-blog-single {
        padding: var(--space-xxl) 0 var(--space-xl);
    }
    .p-blog-single__thumb {
        margin: 0 0 var(--space-lg);
        border-radius: 8px;
        overflow: hidden;
        aspect-ratio: 16 / 9;
        background: var(--color-bg-alt);
    }
    .p-blog-single__thumb img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        display: block;
    }
    .p-blog-single__meta {
        display: flex;
        align-items: center;
        gap: 12px;
        margin-bottom: var(--space-md);
        flex-wrap: wrap;
    }
    .p-blog-single__date {
        font-size: var(--fs-sm);
        color: var(--color-text-sub);
        letter-spacing: 0.05em;
    }
    .p-blog-single__badge {
        display: inline-flex;
        align-items: center;
        padding: 3px 12px;
        background: var(--color-cta);
        color: #fff;
        font-size: 11px;
        font-weight: 500;
        letter-spacing: 0.05em;
        border-radius: 2px;
    }
    .p-blog-single__title {
        font-size: clamp(22px, 3.2vw, 36px);
        font-weight: 700;
        line-height: 1.5;
        margin-bottom: var(--space-xl);
        padding-bottom: var(--space-md);
        border-bottom: 2px solid var(--color-cta);
    }
    .p-blog-single__content {
        font-size: var(--fs-base);
        line-height: var(--lh-loose);
        color: var(--color-text);
    }
    .p-blog-single__content > * {
        margin-bottom: 1.4em;
    }
    .p-blog-single__content > *:last-child {
        margin-bottom: 0;
    }
    .p-blog-single__content h2 {
        font-size: clamp(20px, 2.4vw, 28px);
        font-weight: 700;
        line-height: 1.4;
        margin-top: 2em;
        margin-bottom: 0.8em;
        padding: 8px 0 8px 16px;
        border-left: 4px solid var(--color-cta);
        background: #F9FAFC;
    }
    .p-blog-single__content h3 {
        font-size: clamp(18px, 2vw, 22px);
        font-weight: 700;
        line-height: 1.5;
        margin-top: 1.8em;
        margin-bottom: 0.6em;
        color: var(--color-cta);
        border-bottom: 1px solid var(--color-border);
        padding-bottom: 0.4em;
    }
    .p-blog-single__content h4 {
        font-size: var(--fs-md);
        font-weight: 700;
        margin-top: 1.5em;
        margin-bottom: 0.5em;
    }
    .p-blog-single__content p {
        margin-bottom: 1em;
    }
    .p-blog-single__content a {
        color: var(--color-cta);
        text-decoration: underline;
        text-underline-offset: 3px;
    }
    .p-blog-single__content a:hover {
        opacity: 0.7;
    }
    .p-blog-single__content img {
        max-width: 100%;
        height: auto;
        border-radius: 4px;
        margin: 1em 0;
    }
    .p-blog-single__content figure {
        margin: 1.5em 0;
    }
    .p-blog-single__content figcaption {
        margin-top: 8px;
        font-size: var(--fs-xs);
        color: var(--color-text-sub);
        text-align: center;
    }
    .p-blog-single__content ul,
    .p-blog-single__content ol {
        margin: 0 0 1.2em;
        padding-left: 1.5em;
    }
    .p-blog-single__content ul { list-style: disc; }
    .p-blog-single__content ol { list-style: decimal; }
    .p-blog-single__content li {
        margin-bottom: 0.4em;
        line-height: var(--lh-base);
    }
    .p-blog-single__content blockquote {
        margin: 1.5em 0;
        padding: var(--space-md) var(--space-lg);
        background: #F9FAFC;
        border-left: 4px solid var(--color-cta);
        font-size: var(--fs-sm);
        color: var(--color-text-sub);
        font-style: italic;
    }
    .p-blog-single__content blockquote p:last-child {
        margin-bottom: 0;
    }
    .p-blog-single__content table {
        width: 100%;
        border-collapse: collapse;
        margin: 1.5em 0;
        font-size: var(--fs-sm);
    }
    .p-blog-single__content th,
    .p-blog-single__content td {
        padding: 12px;
        border: 1px solid var(--color-border);
        text-align: left;
        vertical-align: top;
    }
    .p-blog-single__content th {
        background: #F9FAFC;
        font-weight: 700;
    }
    .p-blog-single__content code {
        background: #F9FAFC;
        padding: 2px 6px;
        border-radius: 3px;
        font-size: 0.9em;
        color: var(--color-cta);
        font-family: SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
    }
    .p-blog-single__content pre {
        background: #1c1c1c;
        color: #f0f0f0;
        padding: 16px;
        border-radius: 6px;
        overflow-x: auto;
        font-size: var(--fs-sm);
    }
    .p-blog-single__content pre code {
        background: transparent;
        color: inherit;
        padding: 0;
    }
    .p-blog-single__content hr {
        border: 0;
        border-top: 1px solid var(--color-border);
        margin: 2em 0;
    }
    .p-blog-single__content iframe {
        max-width: 100%;
        aspect-ratio: 16 / 9;
        height: auto;
        border-radius: 6px;
    }

    .p-blog-single__tags {
        margin-top: var(--space-xl);
        padding-top: var(--space-md);
        border-top: 1px solid var(--color-border);
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
    }
    .c-tag {
        display: inline-flex;
        align-items: center;
        padding: 4px 14px;
        background: #F9FAFC;
        color: var(--color-text-sub);
        font-size: var(--fs-xs);
        border-radius: 999px;
        line-height: 1.5;
    }

    .p-blog-single__back {
        text-align: center;
        margin: var(--space-xxl) 0;
    }

    /* ===== CONTACT ===== */
    .p-contact {
        padding: var(--space-xl) 0 var(--space-xxl);
    }
    .p-contact__intro {
        text-align: center;
        line-height: var(--lh-loose);
        margin-bottom: var(--space-xl);
        font-size: var(--fs-sm);
        color: var(--color-text);
    }
    .p-contact__direct {
        background: #F9FAFC;
        border-radius: 8px;
        padding: var(--space-md) var(--space-lg);
        margin-bottom: var(--space-xl);
        text-align: center;
    }
    .p-contact__direct-label {
        font-size: var(--fs-xs);
        font-weight: 700;
        color: var(--color-cta);
        margin-bottom: 6px;
    }
    .p-contact__direct-line {
        font-size: var(--fs-base);
        line-height: 1.6;
    }
    .p-contact__direct-line a {
        color: var(--color-text);
        font-weight: 700;
    }

    .p-contact__error-banner {
        background: #fdecea;
        color: #b3261e;
        border-radius: 4px;
        padding: 12px 16px;
        margin-bottom: var(--space-md);
        font-size: var(--fs-sm);
    }

    .p-contact__form {
        margin-top: var(--space-md);
    }
    .p-contact__row {
        margin-bottom: var(--space-lg);
    }
    .p-contact__label {
        display: block;
        font-weight: 700;
        font-size: var(--fs-sm);
        margin-bottom: 8px;
        color: var(--color-text);
    }
    .p-contact__required {
        display: inline-block;
        margin-left: 8px;
        padding: 2px 8px;
        background: var(--color-cta);
        color: #fff;
        font-size: 11px;
        font-weight: 500;
        border-radius: 2px;
        vertical-align: middle;
    }
    .p-contact__hint {
        display: inline-block;
        margin-left: 8px;
        font-size: var(--fs-xs);
        font-weight: 400;
        color: var(--color-text-sub);
    }
    .p-contact__input,
    .p-contact__textarea {
        width: 100%;
        padding: 12px 14px;
        border: 1px solid var(--color-border);
        border-radius: 4px;
        background: #fff;
        font-family: var(--font-base);
        font-size: var(--fs-sm);
        line-height: 1.6;
        color: var(--color-text);
        transition: border-color 0.2s, box-shadow 0.2s;
    }
    .p-contact__textarea {
        resize: vertical;
        min-height: 160px;
    }
    .p-contact__input:focus,
    .p-contact__textarea:focus {
        outline: 0;
        border-color: var(--color-cta);
        box-shadow: 0 0 0 3px rgba(0, 38, 74, 0.12);
    }
    .p-contact__input.is-error,
    .p-contact__textarea.is-error {
        border-color: #d93025;
        background: #fff5f5;
    }
    .p-contact__error {
        margin-top: 6px;
        color: #b3261e;
        font-size: var(--fs-xs);
    }
    .p-contact__honeypot {
        position: absolute;
        left: -9999px;
        top: -9999px;
        width: 1px;
        height: 1px;
        overflow: hidden;
    }
    .p-contact__submit {
        text-align: center;
        margin-top: var(--space-xl);
    }
    .p-contact__submit .c-button {
        min-width: 240px;
        cursor: pointer;
    }

    /* ===== THANKS ===== */
    .p-thanks {
        padding: var(--space-xl) 0 var(--space-xxl);
    }
    .p-thanks__inner {
        text-align: center;
        background: #F9FAFC;
        border-radius: 12px;
        padding: var(--space-xxl) var(--space-lg);
    }
    .p-thanks__lead {
        font-size: var(--fs-md);
        font-weight: 700;
        line-height: var(--lh-loose);
        margin-bottom: var(--space-md);
        color: var(--color-text);
    }
    .p-thanks__sub {
        font-size: var(--fs-sm);
        line-height: var(--lh-loose);
        color: var(--color-text-sub);
        margin-bottom: var(--space-xl);
    }
    .p-thanks__action {
        margin: 0;
    }

    /* ===== BLOG RELATED (関連記事) ===== */
    .p-blog-related {
        padding: var(--space-xxl) 0;
        background: #F9FAFC;
    }
    .p-blog-related__grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-lg) var(--space-md);
        margin-top: var(--space-xl);
    }

    /* ===== SINGLE (記事詳細) ===== */
    .p-single {
        padding: var(--space-xxl) 0;
    }
    .l-container--narrow {
        max-width: 880px;
        margin-inline: auto;
        padding-inline: var(--container-pad);
    }
    .p-single__header {
        margin-bottom: var(--space-xl);
        padding-bottom: var(--space-md);
        border-bottom: 1px solid var(--color-border);
    }
    .p-single__meta {
        display: flex;
        align-items: center;
        gap: 12px;
        margin-bottom: 12px;
    }
    .p-single__date {
        font-size: var(--fs-xs);
        color: var(--color-text);
        letter-spacing: 0.05em;
    }
    .p-single__badge {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 3px 12px;
        background: var(--color-cta);
        color: #fff;
        font-size: 11px;
        font-weight: 500;
        letter-spacing: 0.05em;
        border-radius: 2px;
    }
    .p-single__title {
        font-size: clamp(20px, 3vw, 32px);
        font-weight: 700;
        line-height: 1.4;
    }
    .p-single__thumb {
        margin: 0 0 var(--space-xl);
    }
    .p-single__thumb img {
        width: 100%;
        height: auto;
        display: block;
    }
    .p-single__content {
        line-height: var(--lh-loose);
        font-size: var(--fs-base);
    }
    .p-single__content > * + * {
        margin-top: 1em;
    }
    .p-single__back {
        text-align: center;
        margin-top: var(--space-xxl);
    }

    /* ===== ARCHIVE (BLOG / NEWS) ===== */
    .p-archive {
        padding: var(--space-xxl) 0;
    }
    .p-archive__grid {
        display: grid;
        gap: var(--space-lg) var(--space-md);
        margin-bottom: var(--space-xxl);
    }
    .p-archive__grid--blog {
        grid-template-columns: repeat(3, 1fr);
    }
    .p-archive__empty {
        font-size: var(--fs-sm);
        color: var(--color-text-sub);
        text-align: center;
        padding: var(--space-xl) 0;
    }

    /* NEWSアーカイブ */
    .p-news-list {
        margin-bottom: var(--space-xxl);
        border-top: 1px solid var(--color-border);
    }
    .p-news-list__item {
        border-bottom: 1px solid var(--color-border);
    }
    .p-news-list__link {
        display: block;
        padding: 18px 0;
        transition: opacity 0.2s;
    }
    a.p-news-list__link:hover {
        opacity: 0.7;
    }
    .p-news-list__link--nolink {
        cursor: default;
    }
    .p-news-list__meta {
        display: flex;
        align-items: center;
        gap: 12px;
        margin-bottom: 6px;
    }
    .p-news-list__date {
        font-size: var(--fs-xs);
        color: var(--color-text);
        letter-spacing: 0.05em;
    }
    .p-news-list__badge {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 3px 12px;
        background: var(--color-cta);
        color: #fff;
        font-size: 11px;
        font-weight: 500;
        letter-spacing: 0.05em;
        border-radius: 2px;
        line-height: 1.4;
    }
    .p-news-list__title {
        font-size: var(--fs-sm);
        font-weight: 700;
        line-height: 1.5;
        color: var(--color-text);
    }

    /* ===== COMPANY ===== */
    .p-company__grid {
        display: grid;
        grid-template-columns: 1fr 1.1fr;
        gap: var(--space-xl);
        align-items: center;
    }
    .p-company__main {
        order: 1;
    }
    .p-company__image {
        order: 2;
        margin: 0;
        overflow: hidden;
    }
    .p-company__image img {
        width: 100%;
        height: auto;
        display: block;
    }
}

/* ==========================================================================
   responsive
   ========================================================================== */
@media (max-width: 1023px) {
    :root {
        --fs-xxl: 40px;
        --fs-xl: 28px;
    }
}

@media (max-width: 1023px) {
    .l-header__inner {
        padding-inline: 24px;
        gap: var(--space-md);
    }
    .l-header__menu {
        gap: 20px;
    }
    .l-header__menu a {
        font-size: 14px;
    }

    /* セクション余白を圧縮 */
    .p-section {
        padding: var(--space-xl) 0;
    }

    /* MEDIA カードを2列 */
    .p-media__blog {
        grid-template-columns: repeat(2, 1fr);
    }
    .p-media__videos {
        grid-template-columns: repeat(2, 1fr);
    }

    /* BLOGアーカイブを2列 */
    .p-archive__grid--blog {
        grid-template-columns: repeat(2, 1fr);
    }

    /* WORKS: 施工実績を2列 */
    .p-works-achievement__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* BLOG関連記事を2列 */
    .p-blog-related__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    /* WORKS: 事業内容のオーバーラップを縮小 */
    .p-works-business__text {
        margin-left: -24px;
    }
    .p-works-business__item--reverse .p-works-business__text {
        margin-right: -24px;
    }

    /* COMPANY 縦並び */
    .p-company__grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    .p-company__main {
        order: 2;
    }
    .p-company__image {
        order: 1;
    }
}

@media (max-width: 767px) {
    :root {
        --container-pad: 16px;
        --header-h: 64px;
        --fs-xxl: 28px;
        --fs-xl: 22px;
        --fs-lg: 20px;
        --space-xxl: 64px;
        --space-xl: 48px;
    }

    .l-header__inner {
        padding-inline: 16px;
        gap: var(--space-md);
    }
    .l-header__logo img {
        height: 36px;
    }
    .l-header__nav,
    .l-header__cta {
        display: none;
    }
    .l-header__burger {
        display: flex;
        flex-direction: column;
        justify-content: center;
        gap: 6px;
        margin-left: auto;
        width: 32px;
        height: 32px;
    }
    .l-header__burger span {
        display: block;
        width: 28px;
        height: 1.5px;
        background: var(--color-text);
        transition: transform 0.2s;
    }

    .p-mv {
        height: auto;
        aspect-ratio: 16 / 9;
        min-height: 0;
        max-height: none;
    }
    .p-mv__slide img {
        object-fit: cover;
    }
    .p-mv__copy {
        left: 12px;
        right: 12px;
        bottom: 12%;
    }
    .p-mv__copyline {
        padding: 6px 12px;
        font-size: 15px;
    }

    .c-card--news .c-card__link {
        grid-template-columns: 1fr;
        gap: var(--space-xs);
    }

    /* セクション共通（SP） */
    .p-section {
        padding: var(--space-xl) 0;
    }
    .c-section-head {
        gap: 12px;
        margin-bottom: 20px;
    }

    /* MEDIA */
    .p-media__blog {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    .p-media__videos {
        grid-template-columns: 1fr;
        gap: var(--space-md);
        margin-top: var(--space-xl);
    }

    /* NEWS */
    .p-news__item {
        grid-template-columns: 1fr;
        gap: 4px;
    }

    /* COMPANY */
    .p-company__grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }

    /* BLOGアーカイブを1列 */
    .p-archive__grid--blog {
        grid-template-columns: 1fr;
    }

    /* WORKS: 事業内容を縦並びに */
    .p-works-business__item,
    .p-works-business__item--reverse {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    .p-works-business__item--reverse .p-works-business__image {
        order: 1;
    }
    .p-works-business__item--reverse .p-works-business__text {
        order: 2;
    }
    .p-works-business__text,
    .p-works-business__item--reverse .p-works-business__text {
        margin: -40px 16px 0;
        padding: var(--space-md);
    }

    /* WORKS: 工法タブ */
    .p-works-method__panel {
        padding: var(--space-md);
    }
    .p-works-method__tab {
        padding: 10px 14px;
        font-size: var(--fs-xs);
    }
    .p-works-method__tab-label.is-pc {
        display: none;
    }
    .p-works-method__tab-label.is-sp {
        display: inline;
    }

    /* WORKS: 施工実績を1列 */
    .p-works-achievement__grid {
        grid-template-columns: 1fr;
    }

    /* ABOUT: 定義リストを縦並び */
    .p-about__row {
        grid-template-columns: 1fr;
        gap: 4px;
        padding: 14px 4px;
    }
    .p-about__label {
        color: var(--color-cta);
        font-size: var(--fs-xs);
    }

    /* BLOG関連記事を1列 */
    .p-blog-related__grid {
        grid-template-columns: 1fr;
    }

    /* FOOTER (SP) */
    .l-footer__inner {
        padding-inline: 24px;
    }
    .l-footer__grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    .l-footer__menu {
        text-align: left;
        flex-direction: row;
        flex-wrap: wrap;
        gap: 12px 20px;
    }
}