/* ============================================================
   Datahub LP 専用スタイル
   ダークネイビー基調 × 発光シアン/ブルーグラデーション
   ============================================================ */

:root {
    --dh-bg:          #060b1a;
    --dh-bg-2:        #0a1228;
    --dh-bg-3:        #0e1834;
    --dh-surface:     rgba(255, 255, 255, 0.04);
    --dh-surface-2:   rgba(255, 255, 255, 0.07);
    --dh-border:      rgba(120, 170, 255, 0.16);
    --dh-border-glow: rgba(45, 214, 255, 0.55);
    --dh-cyan:        #2dd6ff;
    --dh-blue:        #3b82f6;
    --dh-grad:        linear-gradient(135deg, #2dd6ff 0%, #3b82f6 100%);
    --dh-text:        #e8eef9;
    --dh-muted:       #9aa8c4;
    --dh-danger:      #ff7a7a;
    --dh-font: "Inter", "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Hiragino Sans", sans-serif;
}

/* ── Reset（LP内スコープ） ── */
.datahub-lp,
.datahub-lp *,
.datahub-lp *::before,
.datahub-lp *::after { box-sizing: border-box; margin: 0; padding: 0; }

.datahub-lp {
    background: var(--dh-bg);
    color: var(--dh-text);
    font-family: var(--dh-font);
    font-size: 16px;
    line-height: 1.9;
    letter-spacing: 0.02em;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

.datahub-lp img { max-width: 100%; height: auto; display: block; }
.datahub-lp a { color: inherit; text-decoration: none; }
.datahub-lp ul, .datahub-lp ol { list-style: none; }
.datahub-lp button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }

.dh-container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.dh-container--narrow { max-width: 860px; }

.dh-br-sp { display: none; }

/* ── スクロールリビール ── */
.dh-reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}
.dh-reveal.is-visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
    .dh-reveal { opacity: 1; transform: none; transition: none; }
}

/* ── 汎用ボタン ── */
.dh-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-weight: 700;
    border-radius: 999px;
    transition: transform 0.25s ease, box-shadow 0.25s ease, opacity 0.25s ease;
    padding: 14px 32px;
    font-size: 15px;
    line-height: 1.4;
}
.dh-btn--gradient {
    background: var(--dh-grad);
    color: #fff;
    box-shadow: 0 4px 20px rgba(45, 150, 255, 0.35);
}
.dh-btn--gradient:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(45, 170, 255, 0.5); }
.dh-btn--glow {
    box-shadow:
        0 0 24px rgba(45, 214, 255, 0.45),
        0 0 60px rgba(59, 130, 246, 0.35);
}
.dh-btn--glow:hover {
    box-shadow:
        0 0 32px rgba(45, 214, 255, 0.65),
        0 0 90px rgba(59, 130, 246, 0.45);
}
.dh-btn--lg { padding: 18px 44px; font-size: 17px; }
.dh-btn--sm { padding: 10px 22px; font-size: 13px; }
.dh-btn--outline {
    border: 1px solid var(--dh-border);
    color: var(--dh-text);
    background: var(--dh-surface);
}
.dh-btn--outline:hover { border-color: var(--dh-border-glow); background: var(--dh-surface-2); }

.dh-grad-text {
    background: var(--dh-grad);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

/* ── LP ヘッダー ── */
.dh-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 100;
    transition: background 0.35s ease, box-shadow 0.35s ease;
}
.dh-header.is-scrolled {
    background: rgba(6, 11, 26, 0.82);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    box-shadow: 0 1px 0 rgba(120, 170, 255, 0.12);
}
.dh-header-inner {
    max-width: 1220px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}
.dh-header-logo { flex-shrink: 0; }
.dh-header-logo img { width: 132px; height: auto; }

/* ページ内ナビゲーション */
.dh-header-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    flex: 1;
    min-width: 0;
}
.dh-header-nav a {
    position: relative;
    font-size: 12.5px;
    font-weight: 600;
    color: var(--dh-muted);
    white-space: nowrap;
    padding: 4px 0;
    transition: color 0.25s ease;
}
.dh-header-nav a::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 2px;
    border-radius: 2px;
    background: var(--dh-grad);
    opacity: 0;
    transform: scaleX(0.4);
    transition: opacity 0.25s ease, transform 0.25s ease;
}
.dh-header-nav a:hover { color: var(--dh-text); }
.dh-header-nav a.is-active { color: var(--dh-text); }
.dh-header-nav a.is-active::after { opacity: 1; transform: scaleX(1); }

/* アンカー移動（固定ヘッダー分のオフセット＋スムーズスクロール） */
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
}
.dh-main section { scroll-margin-top: 86px; }

/* ── セクション共通 ── */
.dh-section { padding: 120px 0; position: relative; }
.dh-section-head { text-align: center; max-width: 820px; margin: 0 auto 64px; }
.dh-section-eyebrow {
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.28em;
    color: var(--dh-cyan);
    margin-bottom: 18px;
    text-transform: uppercase;
}
.dh-section-title {
    font-size: clamp(26px, 4vw, 38px);
    font-weight: 700;
    line-height: 1.5;
    letter-spacing: 0.03em;
    margin-bottom: 22px;
}
.dh-section-lead { color: var(--dh-muted); font-size: 16px; text-align: left; }
@media (min-width: 768px) { .dh-section-lead { text-align: center; } }

/* ============================================================
   Section 1: Hero
   ============================================================ */
.dh-hero {
    position: relative;
    min-height: 100svh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 140px 0 100px;
    overflow: hidden;
    background:
        radial-gradient(ellipse 80% 55% at 50% -10%, rgba(59, 130, 246, 0.22), transparent 65%),
        var(--dh-bg);
}
.dh-particles {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}
.dh-hero-glow {
    position: absolute;
    left: 50%;
    bottom: -30%;
    width: 900px;
    height: 500px;
    transform: translateX(-50%);
    background: radial-gradient(ellipse at center, rgba(45, 214, 255, 0.12), transparent 70%);
    pointer-events: none;
}
.dh-hero-inner { position: relative; z-index: 2; }
.dh-hero-brand { display: flex; justify-content: center; margin-bottom: 36px; }
.dh-hero-brand img { width: clamp(150px, 18vw, 200px); height: auto; opacity: 0.95; }
.dh-hero-title {
    font-size: clamp(32px, 6vw, 60px);
    font-weight: 800;
    line-height: 1.4;
    letter-spacing: 0.03em;
    margin-bottom: 28px;
    text-shadow: 0 0 60px rgba(45, 150, 255, 0.35);
}
.dh-hero-sub {
    font-size: clamp(16px, 2.4vw, 21px);
    font-weight: 700;
    color: var(--dh-text);
    margin-bottom: 22px;
}
.dh-hero-lead {
    max-width: 720px;
    margin: 0 auto 44px;
    color: var(--dh-muted);
    font-size: 15px;
    text-align: left;
}
@media (min-width: 768px) { .dh-hero-lead { text-align: center; } }
.dh-hero-scroll {
    position: absolute;
    bottom: 28px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 10px;
    letter-spacing: 0.3em;
    color: var(--dh-muted);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    z-index: 2;
}
.dh-hero-scroll span {
    width: 1px;
    height: 44px;
    background: linear-gradient(to bottom, var(--dh-cyan), transparent);
    animation: dh-scroll-pulse 2s ease-in-out infinite;
}
@keyframes dh-scroll-pulse {
    0%, 100% { opacity: 0.3; transform: scaleY(0.6); transform-origin: top; }
    50% { opacity: 1; transform: scaleY(1); }
}

/* ============================================================
   Section 2: Problem — 背景を暗く落として重厚感
   ============================================================ */
.dh-problem { background: #040814; }
.dh-problem-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}
.dh-problem-card {
    background: var(--dh-surface);
    border: 1px solid var(--dh-border);
    border-radius: 16px;
    padding: 36px 32px;
    position: relative;
    overflow: hidden;
}
.dh-problem-card::before {
    content: "";
    position: absolute;
    inset: 0 auto auto 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, rgba(255, 122, 122, 0.7), transparent 70%);
}
.dh-problem-card p { color: var(--dh-muted); font-size: 14.5px; }
.dh-problem-icon {
    width: 46px;
    height: 46px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 122, 122, 0.1);
    color: var(--dh-danger);
    margin-bottom: 20px;
}
.dh-problem-icon svg { width: 26px; height: 26px; }
.dh-problem-title { font-size: 18px; font-weight: 700; margin-bottom: 12px; }

/* リビール時のスタッガー */
.dh-problem-grid .dh-problem-card:nth-child(2) { transition-delay: 0.1s; }
.dh-problem-grid .dh-problem-card:nth-child(3) { transition-delay: 0.2s; }
.dh-problem-grid .dh-problem-card:nth-child(4) { transition-delay: 0.3s; }

/* ============================================================
   Section 3: Why RAG Fails — Before/After 対比
   ============================================================ */
.dh-compare {
    border: 1px solid var(--dh-border);
    border-radius: 16px;
    overflow: hidden;
    background: var(--dh-surface);
}
.dh-compare-row {
    display: grid;
    grid-template-columns: 200px 1fr 1fr;
    border-top: 1px solid var(--dh-border);
    font-size: 14.5px;
}
.dh-compare-row > div { padding: 22px 24px; }
.dh-compare-row--head {
    border-top: none;
    background: rgba(59, 130, 246, 0.08);
    font-weight: 700;
    font-size: 14px;
}
.dh-compare-row--head .dh-compare-after span { display: block; font-size: 11px; font-weight: 500; color: var(--dh-muted); }
.dh-compare-req strong { font-size: 15.5px; font-weight: 700; }
.dh-compare-before { color: var(--dh-muted); background: rgba(255, 122, 122, 0.04); }
.dh-compare-after {
    color: var(--dh-text);
    background: rgba(45, 214, 255, 0.06);
    border-left: 1px solid rgba(45, 214, 255, 0.25);
}
.dh-compare-row--head .dh-compare-after { color: var(--dh-cyan); }
.dh-compare-label { display: none; }

/* ============================================================
   Section 4: Solution
   ============================================================ */
.dh-solution {
    background:
        radial-gradient(ellipse 70% 50% at 50% 0%, rgba(45, 214, 255, 0.07), transparent 60%),
        var(--dh-bg-2);
}
.dh-solution-logo { display: flex; justify-content: center; margin-bottom: 30px; }
.dh-solution-logo img {
    width: clamp(200px, 26vw, 280px);
    filter: drop-shadow(0 0 30px rgba(45, 214, 255, 0.35));
}

/* ベン図 */
.dh-venn {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 auto 72px;
    height: 240px;
    max-width: 520px;
}
.dh-venn-circle {
    width: 220px;
    height: 220px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    font-size: 16px;
    font-weight: 700;
    line-height: 1.6;
    text-align: center;
}
.dh-venn-circle--left {
    background: radial-gradient(circle at 35% 40%, rgba(45, 214, 255, 0.16), rgba(45, 214, 255, 0.05));
    border: 1px solid rgba(45, 214, 255, 0.4);
    justify-content: flex-start;
    padding-left: 34px;
    margin-right: -60px;
}
.dh-venn-circle--right {
    background: radial-gradient(circle at 65% 40%, rgba(59, 130, 246, 0.18), rgba(59, 130, 246, 0.05));
    border: 1px solid rgba(59, 130, 246, 0.45);
    justify-content: flex-end;
    padding-right: 44px;
    margin-left: -60px;
}
.dh-venn-center {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    font-size: 15px;
    font-weight: 800;
    letter-spacing: 0.05em;
    color: #fff;
    background: var(--dh-grad);
    padding: 10px 18px;
    border-radius: 999px;
    box-shadow: 0 0 30px rgba(45, 190, 255, 0.5);
    white-space: nowrap;
}

.dh-feature3-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.dh-feature3-card {
    background: var(--dh-surface);
    border: 1px solid var(--dh-border);
    border-radius: 16px;
    padding: 36px 30px;
    transition: border-color 0.3s ease, transform 0.3s ease, opacity 0.8s ease;
}
.dh-feature3-card:hover { border-color: var(--dh-border-glow); }
.dh-feature3-num {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.2em;
    color: var(--dh-cyan);
    text-transform: uppercase;
    margin-bottom: 18px;
}
.dh-feature3-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(45, 214, 255, 0.1);
    color: var(--dh-cyan);
    margin-bottom: 20px;
}
.dh-feature3-icon svg { width: 28px; height: 28px; }
.dh-feature3-title { font-size: 17.5px; font-weight: 700; margin-bottom: 14px; line-height: 1.6; }
.dh-feature3-card p:last-child { color: var(--dh-muted); font-size: 14.5px; }
.dh-feature3-grid .dh-feature3-card:nth-child(2) { transition-delay: 0.1s; }
.dh-feature3-grid .dh-feature3-card:nth-child(3) { transition-delay: 0.2s; }

/* ============================================================
   Section 5: Features — モックアップ＋パララックス
   ============================================================ */
.dh-feature-rows { display: flex; flex-direction: column; gap: 96px; }
.dh-feature-row {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 64px;
    align-items: center;
}
.dh-feature-row--reverse .dh-feature-text { order: 2; }
.dh-feature-row--reverse .dh-feature-visual { order: 1; }
.dh-feature-text h3 {
    font-size: clamp(20px, 2.6vw, 26px);
    font-weight: 700;
    margin-bottom: 18px;
    padding-left: 18px;
    border-left: 3px solid var(--dh-cyan);
    line-height: 1.5;
}
.dh-feature-text p { color: var(--dh-muted); font-size: 15px; }

.dh-feature-visual { will-change: transform; }
.dh-mock {
    background: linear-gradient(160deg, var(--dh-bg-3), var(--dh-bg-2));
    border: 1px solid var(--dh-border);
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45), 0 0 40px rgba(59, 130, 246, 0.08);
}
.dh-mock-bar {
    display: flex;
    gap: 6px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--dh-border);
}
.dh-mock-bar i { width: 9px; height: 9px; border-radius: 50%; background: rgba(255, 255, 255, 0.16); }
.dh-mock-body { padding: 30px 28px; min-height: 220px; display: flex; flex-direction: column; justify-content: center; }

/* 統合と分割モック */
.dh-mock-merge { flex-direction: row; align-items: center; justify-content: space-around; gap: 14px; }
.dh-mock-files { display: flex; flex-direction: column; gap: 10px; }
.dh-mock-files span {
    width: 84px;
    height: 26px;
    border-radius: 6px;
    background: var(--dh-surface-2);
    border: 1px solid var(--dh-border);
}
.dh-mock-arrow { width: 40px; height: 24px; color: var(--dh-cyan); flex-shrink: 0; }
.dh-mock-merged {
    width: 104px;
    height: 104px;
    border-radius: 12px;
    background: linear-gradient(150deg, rgba(45, 214, 255, 0.2), rgba(59, 130, 246, 0.12));
    border: 1px solid var(--dh-border-glow);
    box-shadow: 0 0 26px rgba(45, 214, 255, 0.25);
}

/* リネームモック */
.dh-mock-rename { gap: 16px; }
.dh-mock-line { display: flex; align-items: center; gap: 14px; font-size: 13px; flex-wrap: wrap; }
.dh-mock-line s { color: rgba(255, 255, 255, 0.35); }
.dh-mock-line em {
    font-style: normal;
    color: var(--dh-cyan);
    position: relative;
    padding-left: 26px;
}
.dh-mock-line em::before {
    content: "→";
    position: absolute;
    left: 4px;
    color: var(--dh-muted);
}

/* テーブルモック */
.dh-mock-table { gap: 10px; }
.dh-mock-thead, .dh-mock-trow { display: grid; grid-template-columns: 1fr 1.6fr 1fr; gap: 10px; }
.dh-mock-thead span { height: 18px; border-radius: 4px; background: rgba(45, 214, 255, 0.18); }
.dh-mock-trow span { height: 24px; border-radius: 4px; background: var(--dh-surface-2); }
.dh-mock-trow--active span { background: rgba(45, 214, 255, 0.12); outline: 1px solid rgba(45, 214, 255, 0.4); }

/* エラーハンドリングモック */
.dh-mock-progress { gap: 16px; }
.dh-mock-progressbar {
    height: 10px;
    border-radius: 999px;
    background: var(--dh-surface-2);
    overflow: hidden;
}
.dh-mock-progressbar i {
    display: block;
    width: 94%;
    height: 100%;
    border-radius: inherit;
    background: var(--dh-grad);
    box-shadow: 0 0 14px rgba(45, 214, 255, 0.5);
}
.dh-mock-progresstext { font-size: 13px; color: var(--dh-muted); font-variant-numeric: tabular-nums; }
.dh-mock-alert {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: #ffc46b;
    background: rgba(255, 196, 107, 0.08);
    border: 1px solid rgba(255, 196, 107, 0.3);
    border-radius: 10px;
    padding: 12px 16px;
}
.dh-mock-alert svg { width: 18px; height: 18px; flex-shrink: 0; }

/* ============================================================
   Section 6: Process — タイムライン
   ============================================================ */
.dh-process { background: var(--dh-bg-2); }
.dh-timeline {
    position: relative;
    max-width: 840px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 56px;
    padding-left: 0;
}
.dh-timeline::before {
    content: "";
    position: absolute;
    left: 27px;
    top: 10px;
    bottom: 10px;
    width: 2px;
    background: linear-gradient(to bottom, var(--dh-cyan), var(--dh-blue), rgba(59, 130, 246, 0.1));
}
.dh-timeline-item { position: relative; display: flex; gap: 32px; }
.dh-timeline-marker {
    position: relative;
    z-index: 1;
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--dh-bg);
    border: 2px solid var(--dh-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 800;
    color: var(--dh-cyan);
    box-shadow: 0 0 22px rgba(45, 214, 255, 0.4);
}
.dh-timeline-title {
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.15em;
    color: var(--dh-cyan);
    text-transform: uppercase;
    margin-bottom: 18px;
    display: flex;
    align-items: baseline;
    gap: 16px;
    flex-wrap: wrap;
}
.dh-timeline-title span {
    font-size: 21px;
    color: var(--dh-text);
    letter-spacing: 0.04em;
}
.dh-timeline-steps { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.dh-timeline-step {
    background: var(--dh-surface);
    border: 1px solid var(--dh-border);
    border-radius: 14px;
    padding: 24px 26px;
}
.dh-timeline-step h4 { font-size: 15.5px; font-weight: 700; margin-bottom: 10px; color: var(--dh-text); }
.dh-timeline-step p { font-size: 14px; color: var(--dh-muted); }

/* ============================================================
   Section 7: Ecosystem
   ============================================================ */
.dh-eco-groups { display: flex; flex-direction: column; gap: 34px; margin-bottom: 64px; }
.dh-eco-group {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 24px;
    align-items: center;
    padding: 26px 30px;
    background: var(--dh-surface);
    border: 1px solid var(--dh-border);
    border-radius: 16px;
}
.dh-eco-group-title { font-size: 15px; font-weight: 700; color: var(--dh-cyan); }
.dh-eco-chips { display: flex; flex-wrap: wrap; gap: 12px; }
.dh-eco-chip {
    font-size: 14px;
    font-weight: 600;
    padding: 9px 20px;
    border-radius: 999px;
    background: var(--dh-surface-2);
    border: 1px solid var(--dh-border);
    white-space: nowrap;
}

/* 無限ループカルーセル */
.dh-eco-marquee {
    overflow: hidden;
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
    mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}
.dh-eco-marquee-track {
    display: flex;
    gap: 48px;
    width: max-content;
    animation: dh-marquee 34s linear infinite;
}
.dh-eco-marquee-item {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: 0.02em;
    color: rgba(232, 238, 249, 0.35);
    white-space: nowrap;
}
@keyframes dh-marquee {
    from { transform: translateX(0); }
    to   { transform: translateX(-50%); }
}
@media (prefers-reduced-motion: reduce) {
    .dh-eco-marquee-track { animation: none; }
}

/* ============================================================
   Section 8: Target Data — アコーディオンカード
   ============================================================ */
.dh-target { background: var(--dh-bg-2); }
.dh-target-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
    align-items: start;
}
.dh-target-card {
    background: var(--dh-surface);
    border: 1px solid var(--dh-border);
    border-radius: 14px;
    overflow: hidden;
    transition: border-color 0.35s ease, box-shadow 0.35s ease, opacity 0.8s ease, transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}
.dh-target-card.is-open {
    border-color: var(--dh-border-glow);
    box-shadow: 0 0 24px rgba(45, 214, 255, 0.22);
}
.dh-target-toggle {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 20px 20px;
    text-align: left;
}
.dh-target-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(45, 214, 255, 0.09);
    color: var(--dh-cyan);
}
.dh-target-icon svg { width: 22px; height: 22px; }
.dh-target-name { flex: 1; font-size: 14.5px; font-weight: 700; line-height: 1.5; }

/* + / − アイコン（回転アニメーション） */
.dh-target-plus {
    position: relative;
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}
.dh-target-plus::before,
.dh-target-plus::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    background: var(--dh-cyan);
    border-radius: 2px;
    transform: translate(-50%, -50%);
}
.dh-target-plus::before { width: 14px; height: 2px; }
.dh-target-plus::after { width: 2px; height: 14px; transition: opacity 0.3s ease; }
.is-open .dh-target-plus,
[aria-expanded="true"] .dh-target-plus { transform: rotate(180deg); }
.is-open .dh-target-plus::after,
[aria-expanded="true"] .dh-target-plus::after { opacity: 0; }

.dh-target-panel { overflow: hidden; transition: height 0.45s cubic-bezier(0.22, 1, 0.36, 1); }
.dh-target-panel[hidden] { display: none; }
.dh-target-docs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 4px 20px 22px;
    border-top: 1px dashed var(--dh-border);
    margin: 0 0 0;
    padding-top: 18px;
}
.dh-target-docs li {
    font-size: 12.5px;
    color: var(--dh-muted);
    background: var(--dh-surface-2);
    border-radius: 6px;
    padding: 5px 10px;
    line-height: 1.5;
}
.dh-target-note {
    margin-top: 44px;
    text-align: center;
    color: var(--dh-muted);
    font-size: 14.5px;
    max-width: 760px;
    margin-left: auto;
    margin-right: auto;
}

/* ============================================================
   Section 9: Case Study — カウントアップ
   ============================================================ */
.dh-case-hero {
    text-align: center;
    padding: 52px 24px;
    margin-bottom: 48px;
    background:
        radial-gradient(ellipse 60% 100% at 50% 0%, rgba(45, 214, 255, 0.09), transparent 70%),
        var(--dh-surface);
    border: 1px solid var(--dh-border);
    border-radius: 20px;
}
.dh-case-headline {
    font-size: clamp(20px, 3.4vw, 30px);
    font-weight: 700;
    line-height: 1.8;
}
.dh-case-headline .dh-count {
    font-size: clamp(44px, 8vw, 80px);
    font-weight: 800;
    line-height: 1.1;
    background: var(--dh-grad);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    font-variant-numeric: tabular-nums;
    padding: 0 4px;
}
.dh-case-headline small { font-size: 0.85em; font-weight: 700; }

.dh-case-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 24px;
}
.dh-case-block {
    background: var(--dh-surface);
    border: 1px solid var(--dh-border);
    border-radius: 16px;
    padding: 32px 30px;
}
.dh-case-block p { color: var(--dh-muted); font-size: 14.5px; }
.dh-case-block-title {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.1em;
    padding: 6px 16px;
    border-radius: 999px;
    margin-bottom: 18px;
}
.dh-case-block-title--problem { background: rgba(255, 122, 122, 0.12); color: var(--dh-danger); }
.dh-case-block-title--solution { background: rgba(45, 214, 255, 0.12); color: var(--dh-cyan); }

.dh-case-results {
    background: var(--dh-surface);
    border: 1px solid var(--dh-border);
    border-radius: 16px;
    padding: 40px 36px;
}
.dh-case-results-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 28px;
    padding-left: 14px;
    border-left: 3px solid var(--dh-cyan);
}
.dh-case-results-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.dh-case-result h4 { font-size: 16px; font-weight: 700; margin-bottom: 16px; color: var(--dh-cyan); }
.dh-case-result > p:last-child { color: var(--dh-muted); font-size: 14px; }
.dh-case-time {
    display: flex;
    align-items: baseline;
    gap: 16px;
    margin-bottom: 14px;
    font-variant-numeric: tabular-nums;
}
.dh-case-time svg { color: var(--dh-muted); align-self: center; }
.dh-case-time-before { font-size: 34px; font-weight: 800; color: rgba(232, 238, 249, 0.45); }
.dh-case-time-before small, .dh-case-time-after small { font-size: 0.5em; margin-left: 2px; }
.dh-case-time-after {
    font-size: 46px;
    font-weight: 800;
    background: var(--dh-grad);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}
.dh-case-flow { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; font-size: 14.5px; }
.dh-case-flow s { color: rgba(232, 238, 249, 0.4); }
.dh-case-flow em { font-style: normal; font-weight: 700; color: var(--dh-cyan); }

/* ============================================================
   Section 10: Pricing
   ============================================================ */
.dh-pricing { background: var(--dh-bg-2); }
.dh-pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 32px;
}
.dh-pricing-card {
    background: var(--dh-surface);
    border: 1px solid var(--dh-border);
    border-radius: 18px;
    padding: 40px 32px;
    display: flex;
    flex-direction: column;
    transition: border-color 0.3s ease, opacity 0.8s ease, transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}
.dh-pricing-card:hover { border-color: var(--dh-border-glow); }
.dh-pricing-name { font-size: 18px; font-weight: 700; margin-bottom: 16px; line-height: 1.5; }
.dh-pricing-type {
    display: inline-block;
    align-self: flex-start;
    font-size: 13.5px;
    font-weight: 700;
    color: var(--dh-cyan);
    background: rgba(45, 214, 255, 0.1);
    border: 1px solid rgba(45, 214, 255, 0.3);
    padding: 7px 16px;
    border-radius: 999px;
    margin-bottom: 20px;
}
.dh-pricing-desc { color: var(--dh-muted); font-size: 14px; flex: 1; margin-bottom: 28px; }
.dh-pricing-grid .dh-pricing-card:nth-child(2) { transition-delay: 0.1s; }
.dh-pricing-grid .dh-pricing-card:nth-child(3) { transition-delay: 0.2s; }
.dh-pricing-note { text-align: center; color: var(--dh-muted); font-size: 13.5px; margin-bottom: 36px; }
.dh-pricing-cta { text-align: center; }

/* ============================================================
   Section 11: FAQ
   ============================================================ */
.dh-faq-list { display: flex; flex-direction: column; gap: 14px; }
.dh-faq-item {
    background: var(--dh-surface);
    border: 1px solid var(--dh-border);
    border-radius: 14px;
    overflow: hidden;
    transition: border-color 0.3s ease, opacity 0.8s ease, transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}
.dh-faq-item.is-open { border-color: var(--dh-border-glow); }
.dh-faq-q {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 22px 24px;
    text-align: left;
}
.dh-faq-mark {
    flex-shrink: 0;
    width: 34px;
    height: 34px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 800;
    background: var(--dh-surface-2);
    color: var(--dh-text);
}
.dh-faq-mark--a {
    background: var(--dh-grad);
    color: #fff;
    box-shadow: 0 0 14px rgba(45, 190, 255, 0.4);
}
.dh-faq-q-text { flex: 1; font-size: 15.5px; font-weight: 700; line-height: 1.7; }
.dh-faq-a { overflow: hidden; transition: height 0.45s cubic-bezier(0.22, 1, 0.36, 1); }
.dh-faq-a[hidden] { display: none; }
.dh-faq-a-inner {
    display: flex;
    gap: 18px;
    padding: 4px 24px 26px;
}
.dh-faq-a-inner p { flex: 1; color: var(--dh-muted); font-size: 14.5px; padding-top: 5px; }

/* ============================================================
   Section 12: CTA
   ============================================================ */
.dh-cta {
    position: relative;
    padding: 140px 0;
    text-align: center;
    overflow: hidden;
    background:
        radial-gradient(ellipse 70% 80% at 50% 110%, rgba(59, 130, 246, 0.25), transparent 65%),
        var(--dh-bg);
}
.dh-cta-inner { position: relative; z-index: 2; }
.dh-cta-title {
    font-size: clamp(26px, 4.6vw, 44px);
    font-weight: 800;
    line-height: 1.5;
    margin-bottom: 26px;
}
.dh-cta-lead {
    max-width: 680px;
    margin: 0 auto 44px;
    color: var(--dh-muted);
    font-size: 15.5px;
}

/* ============================================================
   Section 13: Footer（サイト共通フッター）
   main.css は読み込まないため、共通フッターに必要なスタイルを
   main.css から複製している。共通フッターのデザイン変更時は要同期。
   ============================================================ */
:root {
    --color-black: #232323;
    --color-white: #ffffff;
    --font-primary: 'Noto Sans JP', 'Helvetica Neue', Arial, sans-serif;
    --font-en: 'Inter', 'Helvetica Neue', Arial, sans-serif;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --container-max: 1280px;
}

.datahub-lp .container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 2rem;
}

.site-footer {
    background-color: var(--color-black);
    color: rgba(255, 255, 255, 0.6);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding: var(--spacing-lg) 0 var(--spacing-md);
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.7;
    letter-spacing: normal;
}

.footer-inner {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr;
    gap: var(--spacing-md);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    margin-bottom: var(--spacing-md);
}

.footer-brand .site-logo {
    color: var(--color-white);
    font-size: 1rem;
    margin-bottom: 1rem;
    display: block;
}

.footer-brand p {
    font-size: 0.8rem;
    line-height: 1.8;
    max-width: 260px;
}

.footer-nav-title {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-white);
    margin-bottom: 1rem;
}

.footer-nav ul {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.footer-nav a {
    font-size: 0.8rem;
    transition: color var(--transition);
}

.footer-nav a:hover {
    color: var(--color-white);
}

.footer-nav--services .footer-nav-title a {
    color: var(--color-white);
}

.footer-service-group { margin-bottom: 1rem; }
.footer-service-group:last-child { margin-bottom: 0; }

.footer-service-cat {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: rgba(255, 255, 255, 0.35);
    text-transform: uppercase;
    margin-bottom: 0.4rem;
}

.footer-service-group ul { gap: 0.35rem; }

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-copy {
    font-size: 0.75rem;
    font-family: var(--font-en);
}

@media (max-width: 1024px) {
    .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
    .footer-inner { grid-template-columns: 1fr; }
}

/* footer.php に含まれるメンバーモーダルは LP では未使用のため非表示 */
.datahub-lp .member-modal-overlay { display: none; }

/* ============================================================
   レスポンシブ
   ============================================================ */
@media (max-width: 1120px) {
    /* ナビは2段目に折り返し、横スクロール可能に */
    .dh-header-inner { flex-wrap: wrap; padding: 12px 24px; row-gap: 0; }
    .dh-header-nav {
        order: 3;
        flex: 1 0 100%;
        justify-content: flex-start;
        overflow-x: auto;
        padding: 8px 0 10px;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        -webkit-mask-image: linear-gradient(90deg, #000 90%, transparent);
        mask-image: linear-gradient(90deg, #000 90%, transparent);
    }
    .dh-header-nav::-webkit-scrollbar { display: none; }
    .dh-main section { scroll-margin-top: 108px; }
}

@media (max-width: 1024px) {
    .dh-target-grid { grid-template-columns: repeat(2, 1fr); }
    .dh-feature-row { gap: 44px; }
}

@media (max-width: 820px) {
    .dh-br-sp { display: inline; }
    .dh-section { padding: 84px 0; }
    .dh-section-head { margin-bottom: 44px; }

    /* Problem */
    .dh-problem-grid { grid-template-columns: 1fr; }

    /* Compare table → カード積み */
    .dh-compare { border: none; background: none; display: flex; flex-direction: column; gap: 16px; overflow: visible; }
    .dh-compare-row {
        display: block;
        border: 1px solid var(--dh-border);
        border-radius: 14px;
        background: var(--dh-surface);
        overflow: hidden;
    }
    .dh-compare-row--head { display: none; }
    .dh-compare-row > div { padding: 16px 20px; }
    .dh-compare-req { padding-bottom: 4px; }
    .dh-compare-req strong { font-size: 17px; }
    .dh-compare-after { border-left: none; border-top: 1px solid rgba(45, 214, 255, 0.25); }
    .dh-compare-label {
        display: block;
        font-size: 11px;
        font-weight: 700;
        letter-spacing: 0.08em;
        margin-bottom: 6px;
        color: var(--dh-muted);
    }
    .dh-compare-label--before { color: var(--dh-danger); }
    .dh-compare-label--after { color: var(--dh-cyan); }

    /* Solution */
    .dh-feature3-grid { grid-template-columns: 1fr; }
    .dh-venn { height: 200px; }
    .dh-venn-circle { width: 170px; height: 170px; font-size: 12.5px; }
    .dh-venn-circle--left { margin-right: -44px; padding-left: 13px; }
    .dh-venn-circle--right { margin-left: -44px; padding-right: 15px; }
    .dh-venn-center { font-size: 13.5px; padding: 8px 14px; }

    /* Features */
    .dh-feature-rows { gap: 64px; }
    .dh-feature-row { grid-template-columns: 1fr; gap: 28px; }
    .dh-feature-row--reverse .dh-feature-text { order: 1; }
    .dh-feature-row--reverse .dh-feature-visual { order: 2; }

    /* Process */
    .dh-timeline::before { left: 21px; }
    .dh-timeline-item { gap: 20px; }
    .dh-timeline-marker { width: 44px; height: 44px; font-size: 17px; }
    .dh-timeline-steps { grid-template-columns: 1fr; }

    /* Ecosystem */
    .dh-eco-group { grid-template-columns: 1fr; gap: 14px; padding: 22px 22px; }

    /* Target data */
    .dh-target-grid { grid-template-columns: 1fr; }

    /* Case study */
    .dh-case-grid, .dh-case-results-grid { grid-template-columns: 1fr; }

    /* Pricing */
    .dh-pricing-grid { grid-template-columns: 1fr; }

    /* Header CTA を小さく */
    .dh-header-logo img { width: 108px; }
    .dh-btn--sm { padding: 9px 16px; font-size: 12px; }
}