/* CASE STUDY */

/* ===== DESIGN-1520（事例ページ専用） =====
 * 1520px 基準の流体レイアウト・タイポ。既存ページには非影響。
 * 戻す場合: このブロックをコメントアウトし、末尾 LEGACY ブロックのコメントを外す。
 * 依存: style.css の :root トークン + .content-innner
 */
.cs-intro,
.cs-list-sec,
.cs-dtl {
    --cs-f-11: clamp(0.625rem, calc(11 * 100vw / 1520), 11px);
    --cs-f-12: clamp(0.6875rem, calc(12 * 100vw / 1520), 12px);
    --cs-f-13: clamp(0.75rem, calc(13 * 100vw / 1520), 13px);
    --cs-f-14: clamp(0.75rem, calc(14 * 100vw / 1520), 14px);
    --cs-f-15: clamp(0.8125rem, calc(15 * 100vw / 1520), 15px);
    --cs-f-16: clamp(0.8125rem, calc(16 * 100vw / 1520), 16px);
    --cs-f-18: clamp(0.875rem, calc(18 * 100vw / 1520), 18px);
    --cs-f-20: clamp(0.875rem, calc(20 * 100vw / 1520), 20px);
    --cs-f-22: clamp(1rem, calc(22 * 100vw / 1520), 22px);
    --cs-f-24: clamp(1rem, calc(24 * 100vw / 1520), 24px);
    --cs-f-26: clamp(1.125rem, calc(26 * 100vw / 1520), 26px);
    --cs-f-30: clamp(1.25rem, calc(30 * 100vw / 1520), 30px);

    /* スペーシング（1520px時のpx。コメントは rem 換算 @1520） */
    --cs-s-5: calc(5 / 1520 * 100vw);       /* 0.3125rem */
    --cs-s-8: calc(8 / 1520 * 100vw);       /* 0.5rem */
    --cs-s-12: calc(12 / 1520 * 100vw);     /* 0.75rem */
    --cs-s-15: calc(15 / 1520 * 100vw);     /* 0.9375rem */
    --cs-s-16: calc(16 / 1520 * 100vw);     /* 1rem */
    --cs-s-20: calc(20 / 1520 * 100vw);     /* 1.25rem */
    --cs-s-23: calc(23 / 1520 * 100vw);     /* 1.4375rem */
    --cs-s-24: calc(24 / 1520 * 100vw);     /* 1.5rem */
    --cs-s-25: calc(25 / 1520 * 100vw);     /* 1.5625rem */
    --cs-s-26n: calc(-26 / 1520 * 100vw);  /* -1.625rem */
    --cs-s-27: calc(27 / 1520 * 100vw);     /* 1.6875rem */
    --cs-s-28: calc(28 / 1520 * 100vw);     /* 1.75rem */
    --cs-s-30: calc(30 / 1520 * 100vw);     /* 1.875rem */
    --cs-s-35: calc(35 / 1520 * 100vw);     /* 2.1875rem */
    --cs-s-36: calc(36 / 1520 * 100vw);     /* 2.25rem */
    --cs-s-40: calc(40 / 1520 * 100vw);     /* 2.5rem */
    --cs-s-45: calc(45 / 1520 * 100vw);     /* 2.8125rem */
    --cs-s-48: calc(48 / 1520 * 100vw);     /* 3rem */
    --cs-s-60: calc(60 / 1520 * 100vw);     /* 3.75rem */
    --cs-s-80: calc(80 / 1520 * 100vw);     /* 5rem */
    --cs-s-90: calc(90 / 1520 * 100vw);     /* 5.625rem */
    --cs-s-100: calc(100 / 1520 * 100vw);   /* 6.25rem */
    --cs-s-160: calc(160 / 1520 * 100vw);   /* 10rem */
    --cs-s-230: calc(230 / 1520 * 100vw);   /* 14.375rem */
    --cs-s-250: calc(250 / 1520 * 100vw);   /* 15.625rem */
}

/* ------------------------
お問い合わせブロック
------------------------ */
.cs-intro {
    position: relative;
    background-color: rgba(217, 237, 244, 0.75);
    padding: var(--cs-s-60) 0;
    overflow: hidden;
}

.cs-intro::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    left: 0;
    height: 100%;
    background: url(../images/case_study/cs-intro.webp) right center / auto 100% no-repeat;
    opacity: 0.25;
    pointer-events: none;
}

.cs-intro-inner {
    position: relative;
    z-index: 1;
    box-sizing: border-box;
}

.cs-intro-inner.content-innner {
    padding-inline: var(--content-pad-inner-fluid);
}

.cs-intro h2 {
    margin: 0 0 var(--cs-s-23);
    padding: 0;
    border-left: 0;
    font-size: var(--cs-f-24);
    font-weight: bold;
    color: #4489C2;
}

.cs-intro-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--cs-s-40);
}

.cs-intro-txt {
    flex: 1;
    min-width: 0;
    margin: 0;
    line-height: 1.65;
    color: #000;
    font-size: var(--cs-f-20);
    font-weight: 500;
}

.cs-intro-cta {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cs-intro-cta .btn {
    min-width: var(--cs-s-250);
    padding: var(--cs-s-20) var(--cs-s-5);
    font-size: var(--cs-f-16);
}

/* ------------------------------------------------
一覧ブロック
------------------------------------------------ */
/* 丸ボタン */
.cs-card-foot.has-arrow::after {
    position: absolute;
    right: 25px;
    bottom: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background-color: #fff;
    color: #666666;
    font-size: 0.85rem;
}

/* 一覧 */
.cs-list-sec.content-innner {
    margin-bottom: var(--cs-s-40);
}

.cs-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--cs-s-30) var(--cs-s-35);
    margin: 0;
    padding: 0;
    list-style: none;
}

.cs-list > li {
    margin: 0;
}

.cs-card {
    height: 100%;
    overflow: hidden;
}

.cs-card > a {
    display: flex;
    flex-direction: column;
    height: 100%;
    color: inherit;
    text-decoration: none;
    background: transparent;
}

.cs-card-img {
    position: relative;
    margin: 0;
    overflow: visible;
    aspect-ratio: 350 / 210;
    background-color: #eee;
    z-index: 2;
}

.cs-card-img > img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.cs-card > a:hover .cs-card-img > img {
    transform: scale(1.08);
}

.cs-card-logo {
    position: absolute;
    right: 0;
    bottom: var(--cs-s-26n);
    z-index: 3;
    width: 33%;
    background-color: #fff;
    line-height: 0;
}

.cs-card-logo img {
    display: block;
    width: 100%;
    height: auto;
}

.cs-card-body {
    display: flex;
    flex-direction: column;
    flex: 1;
    position: relative;
    min-height: 190px;
    padding: 25px 25px 40px;
    background-color: rgba(219, 232, 236, 0.6588);
    z-index: 1;
}

.cs-card-name {
    display: flex;
    align-items: center;
    gap: 5px;
    margin: 0 0 15px;
    font-size: var(--cs-f-12);
    font-weight: bold;
    color: #5698CE;
}

.cs-card-bar {
    display: inline-block;
    width: 1px;
    height: 1.2em;
    background-color: #2B9CD7;
}

.cs-card-ttl {
    margin: 0 0 15px;
    font-size: var(--cs-f-16);
    font-weight: bold;
    line-height: 1.25;
    color: #3C3C3C;
}

.cs-card-foot {
    align-self: flex-start;
    margin-top: 0;
    background: none;
}

/* カテゴリタグ */
.cs-tag {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 3px;
    font-size: var(--cs-f-11);
    font-weight: 500;
    line-height: 1.4;
    color: #fff;
    letter-spacing: 0.02em;
}

.cs-tag-conf {
    background-color: #5B7C66;
}

.cs-tag-edu {
    background-color: #69608E;
}

.cs-tag-media {
    background-color: #C89F2D;
}

@media screen and (max-width: 1000px) {
    .cs-list {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px 20px;
    }

    .cs-card-body {
        min-height: 0;
        padding: 1.125rem 1.125rem 2.25rem;
    }

    .cs-card-logo {
        width: 35%;
        bottom: -1.5em;
    }

    .cs-intro::after {
        top: 0;
        right: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-position: right center;
        background-size: auto 100%;
        opacity: 0.25;
    }
}

/* ------------------------------------------------
詳細ページ
------------------------------------------------ */
.cs-dtl.content-innner {
    padding-top: var(--cs-s-60);
    padding-bottom: var(--cs-s-100);
}

.cs-dtl > header {
    position: static;
    z-index: auto;
    margin-bottom: var(--cs-s-25);
}

.cs-dtl-ttl,
.cs-dtl-hd,
.cs-dtl-hd h2,
.cs-dtl-q {
    scroll-margin-top: calc(var(--site-header-h, 90px) + 1rem);
}

/* タイトル */
.cs-dtl-ttl {
    margin: 0 0 var(--cs-s-15);
    font-size: var(--cs-f-30);
    font-weight: bold;
    line-height: 1.5;
    color: #333;
}

/* タグ・日付 */
.cs-dtl-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin: 0;
}

.cs-dtl-meta .cs-tag {
    font-size: var(--cs-f-14);
    padding: 6px 12px;
}

.cs-dtl-date {
    flex-shrink: 0;
    letter-spacing: 2%;
    font-size: var(--cs-f-16);
    color: #666666;
    font-weight: 500;
}

/* 画像（本文写真・目次と同じインセット幅） */
.cs-dtl-fig {
    margin: 0 var(--content-inset-fluid);
}

.cs-dtl-fig > img {
    display: block;
    width: 100%;
    height: auto;
}

/* 企業情報（本文写真・目次と同じインセット幅） */
.cs-dtl-prof {
    display: flex;
    align-items: center;
    gap: var(--cs-s-45);
    margin: 0 var(--content-inset-fluid) var(--cs-s-60);
    padding: var(--cs-s-25) var(--cs-s-80);
    background-color: #F5F5F5;
}

.cs-dtl-prof-logo {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: var(--cs-s-230);
}

.cs-dtl-prof-logo img {
    display: block;
    width: 100%;
    height: auto;
}

@media screen and (max-width: 1024px) {
    .cs-dtl-prof-logo {
        width: 25%;
        max-width: none;
    }
}

.cs-dtl-prof-body {
    flex: 1;
    min-width: 0;
}

.cs-dtl-name {
    margin: 0 0 10px;
    font-size: var(--cs-f-20);
    font-weight: bold;
    color: #08537B;
}

.cs-dtl-dl {
    margin: 0;
}

.cs-dtl-dl > div {
    display: flex;
    gap: 10px;
    margin-bottom: 3px;
}

.cs-dtl-dl > div:last-child {
    margin-bottom: 0;
}

.cs-dtl-dl dt {
    flex-shrink: 0;
    width: 5em;
    margin: 0;
    font-size: var(--cs-f-15);
    line-height: 1.4;
    color: #666;
    font-weight: 600;
}

.cs-dtl-dl dd {
    margin: 0;
    font-size: var(--cs-f-15);
    line-height: 1.4;
    color: #0B0B0B;
    font-weight: 500;
}

/* リード文 */
.cs-dtl-lead {
    margin-bottom: var(--cs-s-60);
    font-size: var(--cs-f-18);
}

.cs-dtl-lead p {
    margin: 0;
    line-height: 1.7;
    color: #333;
    font-weight: 500;
}

/* 目次（本文より狭いインセット幅） */
.cs-dtl-toc {
    margin: 0 var(--content-inset-fluid) var(--cs-s-60);
    background-color: #eef6f9;
}

.cs-dtl-toc-hd {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: var(--cs-s-25) var(--cs-s-27) var(--cs-s-12);
}

.cs-dtl-toc:not(.is-open) .cs-dtl-toc-hd {
    padding-top: var(--cs-s-25);
    padding-bottom: var(--cs-s-25);
}

.cs-dtl-toc-hd h2 {
    margin: 0;
    font-size: var(--cs-f-20);
    font-weight: 500;
    color: #000;
}

.cs-dtl-toc-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    flex-shrink: 0;
    min-width: var(--cs-s-90);
    padding: var(--cs-s-5) var(--cs-s-16);
    background-color: #fff;
    border: 1px solid rgba(124, 146, 164, 0.7);
    border-radius: 5px;
    font-size: var(--cs-f-12);
    line-height: 1.6;
    color: #666;
    cursor: pointer;
}

.cs-dtl-toc-btn i {
    font-size: 1.3em;
    line-height: 1;
    color: inherit;
    transition: transform 0.2s;
}

.cs-dtl-toc-btn[aria-expanded="true"] i {
    transform: rotate(-90deg);
}

.cs-dtl-toc-btn[aria-expanded="false"] i {
    transform: rotate(90deg) translateX(-2px);
}

.cs-dtl-toc-body {
    padding: 0 var(--cs-s-45) var(--cs-s-24);
}

.cs-dtl-toc:not(.is-open) .cs-dtl-toc-body {
    display: none;
}

.cs-dtl-toc-list {
    margin: 0;
    padding: 0;
    list-style: none;
    line-height: 1.8;
    font-size: var(--cs-f-16);
    font-weight: 500;
    color: #3C3C3C;
}

.cs-dtl-toc-cat {
    margin: 0 0 0.4em;
}

.cs-dtl-toc-list > li + li .cs-dtl-toc-cat {
    margin-top: var(--cs-s-8);
}

.cs-dtl-toc-cat a {
    color: #3C3C3C;
    text-decoration: none;
}

.cs-dtl-toc-list ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

.cs-dtl-toc-list ul li {
    display: flex;
    align-items: flex-start;
    gap: 4px;
    margin-bottom: 0.4em;
    padding-left: 1em;
    font-weight: 500;
}

.cs-dtl-toc-list ul li::before {
    content: 'expand_more';
    flex-shrink: 0;
    font-family: 'Material Symbols Outlined';
    font-size: 1.3em;
    line-height: 1.5;
    color: #7C92A4;
    font-variation-settings: 'FILL' 0, 'wght' 300, 'GRAD' 0, 'opsz' 24;
}

.cs-dtl-toc-list a {
    color: inherit;
    text-decoration: none;
}

.cs-dtl-toc-list a:hover {
    color: #4489c2;
    text-decoration: underline;
}

.cs-dtl-sec {
    margin: 0 0 var(--cs-s-60);
}

.cs-dtl-sec:last-of-type {
    margin-bottom: var(--cs-s-48);
}

.cs-dtl-hd {
    margin-bottom: var(--cs-s-24);
}

/* セクション詳細 */
.cs-dtl-hd h2 {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0 0 var(--cs-s-30);
    font-size: var(--cs-f-26);
    font-weight: 500;
    line-height: 1.2;
    color: #333;
    padding-left: var(--cs-s-15);
}

.cs-dtl-hd h2 .cs-card-bar {
    flex-shrink: 0;
    height: 1em;
}

.cs-dtl-sub {
    margin: 0;
    padding-bottom: 10px;
    border-bottom: 1px solid #daddde;
    font-size: var(--cs-f-24);
    font-weight: bold;
    line-height: 1.6;
    color: #21539E;
}

/* 見出しラベル（「背景」等）を省略し、サブタイトルをそのまま h2 にする場合：
   .cs-dtl-hd h2 の装飾（flexレイアウト・アイコン用の余白・青線等）を打ち消す。
   h2 に class="cs-dtl-sub" が付くのはこのパターンの記事のみなので、
   記事個別のclassを追加しなくてもこのセレクタで安全にスコープできる。 */
.cs-dtl-hd h2.cs-dtl-sub {
    display: block;
    margin: 0;
    border-left: 0;
    padding: 0 0 10px;
    font-size: var(--cs-f-24);
    font-weight: bold;
    line-height: 1.6;
    color: #21539E;
}

.cs-dtl-q {
    display: flex;
    align-items: flex-start;
    gap: 7px;
    margin: var(--cs-s-27) 0 var(--cs-s-20);
    font-size: var(--cs-f-22);
    font-weight: bold;
    line-height: 1.6;
    color: #4489C2;
}

.cs-dtl-sec > p + .cs-dtl-q {
    margin-top: var(--cs-s-35);
}

.cs-dtl-q i {
    flex-shrink: 0;
    font-size: 1.3em;
    color: #4489C2;
    line-height: 1.25;
    margin-left: 7px;
}

.cs-dtl-sec > p {
    margin: 0 0 1em;
    line-height: 1.65;
    color: #333;
    font-size: var(--cs-f-18);
    font-weight: 500;
}

/* 本文中の発言者コメント：色分けはせず、太字＋前後の余白で地の文と区切る。
   原稿の鉤括弧「」が引用符を兼ねるため、装飾用のクオートマークは付けない。
   margin は隣接要素と相殺（collapse）されるため、通常段落の margin-bottom: 1em（約18px）
   より明確に大きい値（--cs-s-40 ≒ 40px）を指定している。 */
.cs-dtl-sec > p.cs-dtl-quote {
    margin-top: var(--cs-s-40);
    margin-bottom: var(--cs-s-40);
    font-weight: bold;
}

/* 本文写真（目次と同じインセット幅） */
.cs-dtl-media {
    margin: var(--cs-s-40) var(--content-inset-fluid) 0;
}

.cs-dtl-media img {
    display: block;
    width: 100%;
    height: auto;
}

/* カード型データ（本文写真と同じインセット幅） */
.cs-dtl-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--cs-s-40);
    margin: var(--cs-s-40) var(--content-inset-fluid) 0;
    padding: 0;
    list-style: none;
}

.cs-dtl-stats > li {
    display: flex;
    flex-direction: column;
    justify-content: center;
    width: auto;
    padding: var(--cs-s-36) var(--cs-s-20) var(--cs-s-40);
    background-color: #e3f2f7a8;
    box-sizing: border-box;
    text-align: center;
}

.cs-dtl-stats > li i {
    order: 2;
    display: block;
    width: var(--cs-s-160);
    max-width: 160px;
    height: var(--cs-s-160);
    max-height: 160px;
    margin: 0 auto var(--cs-s-28);
    font-size: 0;
    line-height: 0;
    overflow: hidden;
    background: linear-gradient(321deg, rgba(51, 144, 187, 1) 0%, rgba(0, 218, 230, 1) 100%);
    -webkit-mask: center / contain no-repeat;
    mask: center / contain no-repeat;
}

.cs-dtl-stats > li i.fa-handshake {
    -webkit-mask-image: url(/images/case_study/icon/handshake-solid-full.svg);
    mask-image: url(/images/case_study/icon/handshake-solid-full.svg);
}

.cs-dtl-stats > li i.fa-users {
    -webkit-mask-image: url(/images/case_study/icon/users-solid-full.svg);
    mask-image: url(/images/case_study/icon/users-solid-full.svg);
}

.cs-dtl-stats > li i.fa-chart-column {
    -webkit-mask-image: url(/images/case_study/icon/chart-column-solid-full.svg);
    mask-image: url(/images/case_study/icon/chart-column-solid-full.svg);
}

.cs-dtl-lbl {
    order: 1;
    margin: 0 0 var(--cs-s-20);
    font-size: var(--cs-f-16);
    font-weight: bold;
}

.cs-dtl-num {
    order: 3;
    margin: 0;
    font-size: var(--cs-f-16);
    font-weight: bold;
    line-height: 1.2;
}

.cs-dtl-num span {
    font-size: clamp(1.5rem, var(--cs-s-48), 3rem);
    font-weight: bold;
    line-height: 1;
    margin: 0 5px;
    color: #08537B;
}

/* 一覧へ戻るボタン */
.cs-dtl-back {
    margin: var(--cs-s-60) 0 0;
    text-align: center;
}

.cs-dtl-back .btn {
    min-width: var(--cs-s-250);
    padding: var(--cs-s-20) var(--cs-s-5);
    font-size: var(--cs-f-16);
    border-radius: 3px;
}

/* ------------------------------------------------
レスポンシブ（768 / 480）
------------------------------------------------ */
@media screen and (max-width: 768px) {
    .cs-intro,
    .cs-list-sec,
    .cs-dtl {
        /* SP: vwスケール停止 → rem固定（コメントは @1520px 時のpx÷16） */
        --cs-s-5: 0.3125rem;
        --cs-s-8: 0.5rem;
        --cs-s-12: 0.75rem;
        --cs-s-15: 0.9375rem;
        --cs-s-16: 1rem;
        --cs-s-20: 1.25rem;
        --cs-s-23: 1.4375rem;
        --cs-s-24: 1.5rem;
        --cs-s-25: 1.5625rem;
        --cs-s-26n: -1rem;
        --cs-s-27: 1.6875rem;
        --cs-s-28: 1.75rem;
        --cs-s-30: 1.875rem;
        --cs-s-35: 2.1875rem;
        --cs-s-36: 2.25rem;
        --cs-s-40: 2.5rem;
        --cs-s-45: 2.8125rem;
        --cs-s-48: 3rem;
        --cs-s-60: 2.5rem;
        --cs-s-80: 3rem;
        --cs-s-90: 5.625rem;
        --cs-s-100: 4rem;
        --cs-s-160: 7.5rem;
        --cs-s-230: 12rem;
        --cs-s-250: 15.625rem;
    }

    /* intro */
    .cs-intro {
        padding: 1.25rem 0;
    }

    .cs-intro-inner.content-innner {
        padding-top: 0;
        padding-bottom: 0;
        padding-inline: var(--content-pad-inner-fluid);
    }

    .cs-intro h2 {
        margin-bottom: 1rem;
        font-size: var(--cs-f-20);
    }

    .cs-intro-txt {
        font-size: var(--cs-f-16);
    }

    .cs-intro-row {
        flex-direction: column;
        align-items: stretch;
        gap: 1.25rem;
    }

    .cs-intro-cta {
        width: 100%;
        justify-content: center;
    }

    .cs-intro-cta .btn,
    .cs-dtl-back .btn {
        width: auto;
        min-width: 12.5rem;
        padding: 0.875rem 1.5rem;
        font-size: var(--cs-f-16);
        border-radius: 5px;
    }

    /* カテゴリタグ */
    .cs-tag {
        font-size: 0.625rem;
        padding: 2px 6px;
    }

    .cs-dtl-meta .cs-tag {
        font-size: var(--cs-f-12);
        padding: 4px 10px;
    }

    /* 一覧 */
    .cs-list-sec.content-innner {
        margin-bottom: 2rem;
    }

    .cs-list {
        gap: 1.25rem 1rem;
    }

    .cs-card-body {
        min-height: 0;
        padding: 1rem 1rem 2.25rem;
    }

    .cs-card-foot.has-arrow::after {
        right: 1rem;
        bottom: 0.875rem;
        width: 24px;
        height: 24px;
    }

    .cs-card-logo {
        width: 35%;
        bottom: -1.8rem;
    }

    /* 詳細 */
    .cs-dtl.content-innner {
        padding-top: 2.5rem;
        padding-bottom: 3.5rem;
    }

    .cs-dtl-ttl {
        font-size: var(--cs-f-22);
        line-height: 1.45;
    }

    .cs-dtl-meta {
        flex-wrap: wrap;
        gap: 0.5rem 1rem;
    }

    .cs-dtl-prof {
        display: grid;
        grid-template-columns: 25% 1fr;
        grid-template-areas:
            "logo name"
            "details details";
        align-items: center;
        gap: 0.75rem 1rem;
        padding: 1rem 1.25rem;
    }

    .cs-dtl-prof-body {
        display: contents;
    }

    .cs-dtl-prof-logo {
        grid-area: logo;
        width: 100%;
        min-width: 0;
        max-width: none;
        flex-shrink: 0;
    }

    .cs-dtl-name {
        grid-area: name;
        margin: 0;
        align-self: center;
    }

    .cs-dtl-dl {
        grid-area: details;
    }

    .cs-dtl-dl > div {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.2rem;
        margin-bottom: 0.75rem;
    }

    .cs-dtl-dl > div:last-child {
        margin-bottom: 0;
    }

    .cs-dtl-dl dt {
        width: auto;
    }

    .cs-dtl-lead {
        font-size: var(--cs-f-16);
    }

    .cs-dtl-toc,
    .cs-dtl-media,
    .cs-dtl-stats {
        margin-left: 0;
        margin-right: 0;
    }

    .cs-dtl-toc-hd {
        padding: 1.25rem 1.25rem 0.75rem;
        gap: 0.75rem;
    }

    .cs-dtl-toc:not(.is-open) .cs-dtl-toc-hd {
        padding-top: 1.25rem;
        padding-bottom: 1.25rem;
    }

    .cs-dtl-toc-hd h2 {
        font-size: var(--cs-f-18);
    }

    .cs-dtl-toc-btn {
        min-width: 5.5rem;
    }

    .cs-dtl-toc-body {
        padding: 0 1.25rem 1.25rem;
    }

    .cs-dtl-hd h2 {
        font-size: var(--cs-f-22);
        margin-bottom: 1.25rem;
        padding-left: 0.75rem;
    }

    .cs-dtl-sub {
        font-size: var(--cs-f-20);
        padding-bottom: 0.5rem;
    }

    .cs-dtl-hd h2.cs-dtl-sub {
        font-size: var(--cs-f-20);
        margin: 0;
        padding-bottom: 0.5rem;
    }

    .cs-dtl-q {
        font-size: var(--cs-f-18);
        margin-top: 1.25rem;
        gap: 0.35rem;
        margin-bottom: 0.5rem;
    }

    .cs-dtl-q i {
        margin-left: 0;
        font-size: 1.2em;
    }

    .cs-dtl-sec > p + .cs-dtl-q {
        margin-top: 1.75rem;
    }

    .cs-dtl-sec > p {
        font-size: var(--cs-f-16);
    }

    .cs-dtl-stats {
        grid-template-columns: repeat(2, max-content);
        justify-content: center;
        gap: 1rem;
        margin-top: 2rem;
    }

    .cs-dtl-stats > li {
        width: 14.5rem;
        max-width: 14.5rem;
        padding: 1.25rem 1rem 1.5rem;
    }

    /* 奇数個のとき最後の1枚を中央寄せ（上段カードと同じ幅） */
    .cs-dtl-stats > li:last-child:nth-child(odd) {
        grid-column: 1 / -1;
        justify-self: center;
    }

    .cs-dtl-num span {
        font-size: clamp(1.5rem, 6vw, 2.25rem);
    }

    .cs-dtl-back {
        margin-top: 2.5rem;
    }
}

@media screen and (max-width: 600px) {
    .cs-card-logo {
        width: 35%;
        bottom: -1.35rem;
    }
}

@media screen and (max-width: 480px) {
    .cs-intro {
        padding: 1rem 0;
    }

    .cs-intro-inner.content-innner {
        padding-inline: 40px;
    }

    .cs-intro-cta .btn,
    .cs-dtl-back .btn {
        min-width: 11rem;
        padding: 0.875rem 1.5rem;
    }

    .cs-tag {
        font-size: 0.5625rem;
        padding: 2px 5px;
    }

    .cs-dtl-meta .cs-tag {
        font-size: var(--cs-f-11);
        padding: 3px 8px;
    }

    .cs-list {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }

    .cs-list-sec.content-innner {
        padding-bottom: 2.5rem;
    }

    .cs-card-body {
        min-height: 0;
        padding: 1rem 1rem 2rem;
    }

    .cs-card-logo {
        width: 33%;
        bottom: -2rem;
    }

    .cs-card-ttl {
        font-size: var(--cs-f-15);
    }

    .cs-dtl.content-innner {
        padding-top: 2rem;
        padding-bottom: 3rem;
    }

    .cs-dtl-ttl {
        font-size: var(--cs-f-20);
    }

    .cs-dtl-prof {
        padding: 0.875rem 1rem;
    }

    .cs-dtl-toc-hd,
    .cs-dtl-toc-body {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .cs-dtl-toc-btn {
        min-width: 5rem;
        padding: 0.25rem 0.75rem;
        font-size: var(--cs-f-11);
    }

    .cs-dtl-stats {
        grid-template-columns: 1fr;
        justify-items: stretch;
    }

    .cs-dtl-stats > li {
        width: 100%;
        max-width: none;
    }

    .cs-dtl-stats > li:last-child:nth-child(odd) {
        grid-column: auto;
        justify-self: stretch;
        width: 100%;
        max-width: none;
    }

    .cs-dtl-lbl, .cs-dtl-stats > li i {
        margin-bottom: 0.2rem;
    }

    .cs-dtl-stats > li i {
        width: 6rem;
        height: 6rem;
        max-width: 100px;
        max-height: 100px;
    }
}

/* ===== LEGACY（DESIGN-1520 無効化時にコメントを外す） =====
.cs-list-sec.content-innner,
.cs-dtl.content-innner {
    padding-left: 50px;
    padding-right: 50px;
}
.cs-intro-inner {
    max-width: 1120px;
    padding: 0 50px;
}
.cs-dtl-toc,
.cs-dtl-media {
    margin-left: 100px;
    margin-right: 100px;
}
@media screen and (max-width: 768px) {
    .cs-list-sec.content-innner,
    .cs-dtl.content-innner {
        padding-left: 20px;
        padding-right: 20px;
    }
}
===== LEGACY END ===== */