/* ==========================================================================
   合同会社みらい樹 - メインスタイルシート (style.css)
   カラー構成:
   - Base White: #f8fafc / #ffffff (知的で清潔感のある基調)
   - Deep Navy: #0a1128 / #0f172a / #1e293b (堅牢な技術力・信頼感)
   - Technical Blue: #1d4ed8 / #2563eb / #0284c7 (先進性・システム感)
   - Accent Green: #059669 / #10b981 (みらい樹アイデンティティ・生命力・現場感)
   ========================================================================== */

:root {
    --color-bg-light: #f8fafc;
    --color-bg-white: #ffffff;
    --color-bg-card: #ffffff;
    --color-bg-subtle: #f1f5f9;
    --color-bg-dark: #090e1a;
    --color-bg-navy: #0f172a;
    --color-bg-navy-light: #1e293b;

    --color-text-main: #0f172a;
    --color-text-muted: #475569;
    --color-text-subtle: #64748b;
    --color-text-light: #ffffff;
    --color-text-light-muted: #94a3b8;

    --color-primary: #1e40af;
    --color-primary-light: #3b82f6;
    --color-primary-dark: #172554;
    
    --color-accent: #059669;
    --color-accent-light: #10b981;
    --color-accent-subtle: #ecfdf5;

    --color-border: #e2e8f0;
    --color-border-dark: #334155;
    --color-border-accent: rgba(16, 185, 129, 0.3);

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', Menlo, Monaco, Consolas, "Courier New", monospace;

    --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.06);
    --shadow-technical: 0 0 0 1px rgba(15, 23, 42, 0.08), 0 8px 24px -4px rgba(15, 23, 42, 0.06);

    --container-max: 1240px;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --transition-base: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* アクセシビリティ: スキップリンク (WCAG 2.2 AA) */
.skip-link {
    position: absolute;
    top: -9999px;
    left: 16px;
    z-index: 99999;
    padding: 12px 20px;
    background: var(--color-primary);
    color: #ffffff;
    font-weight: 700;
    font-size: 0.9375rem;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 14px rgba(0,0,0,0.35);
    text-decoration: none;
    transition: top 0.15s ease-out;
}
.skip-link:focus {
    top: 16px;
    outline: 3px solid var(--color-accent-light);
    outline-offset: 3px;
}

/* リセット & 基本設定 */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text-main);
    background-color: var(--color-bg-light);
    line-height: 1.7;
    letter-spacing: -0.01em;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition-base);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul, ol {
    list-style: none;
}

button, input, select, textarea {
    font-family: inherit;
    font-size: inherit;
}

/* レイアウト・コンテナ */
.site-container {
    width: 100%;
    max-width: var(--container-max);
    margin-left: auto;
    margin-right: auto;
    padding-left: 24px;
    padding-right: 24px;
}

.section-wrapper {
    padding-top: 100px;
    padding-bottom: 100px;
    position: relative;
}

.section-wrapper-sm {
    padding-top: 60px;
    padding-bottom: 60px;
}

.bg-white {
    background-color: var(--color-bg-white);
}

.bg-subtle {
    background-color: var(--color-bg-subtle);
}

.bg-dark {
    background-color: var(--color-bg-dark);
    color: var(--color-text-light);
}

.bg-navy {
    background-color: var(--color-bg-navy);
    color: var(--color-text-light);
}

/* タイポグラフィ & ヘッダー */
.section-header {
    text-align: center;
    max-width: 840px;
    margin: 0 auto 56px auto;
}

.section-header.text-left {
    text-align: left;
    margin-left: 0;
}

.section-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    background-color: var(--color-accent-subtle);
    padding: 4px 14px;
    border-radius: 9999px;
    border: 1px solid var(--color-border-accent);
    margin-bottom: 16px;
}

.bg-dark .section-kicker,
.bg-navy .section-kicker {
    background-color: rgba(16, 185, 129, 0.15);
    color: #34d399;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 800;
    line-height: 1.3;
    letter-spacing: -0.02em;
    color: var(--color-text-main);
    margin-bottom: 16px;
}

.bg-dark .section-title,
.bg-navy .section-title {
    color: var(--color-text-light);
}

.section-lead {
    font-size: 1.0625rem;
    color: var(--color-text-muted);
    line-height: 1.8;
}

.bg-dark .section-lead,
.bg-navy .section-lead {
    color: var(--color-text-light-muted);
}

/* ボタンコンポーネント */
.btn-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-weight: 600;
    font-size: 0.9375rem;
    padding: 13px 26px;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition-base);
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--color-primary);
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(30, 64, 175, 0.25);
}

.btn-primary:hover {
    background-color: var(--color-primary-light);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(30, 64, 175, 0.35);
}

.btn-accent {
    background-color: var(--color-accent);
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(5, 150, 105, 0.25);
}

.btn-accent:hover {
    background-color: #047857;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(5, 150, 105, 0.35);
}

.btn-outline {
    background-color: transparent;
    border-color: var(--color-border);
    color: var(--color-text-main);
}

.btn-outline:hover {
    background-color: var(--color-bg-subtle);
    border-color: var(--color-text-muted);
}

.btn-outline-white {
    background-color: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.25);
    color: #ffffff;
}

.btn-outline-white:hover {
    background-color: rgba(255, 255, 255, 0.15);
    border-color: #ffffff;
}

/* ==========================================================================
   サイトヘッダー & メガメニュー (仕様書第9項)
   ========================================================================== */
.site-header {
    position: sticky;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1300;
    background-color: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition-base);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 76px;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.site-logo svg, .site-logo img {
    height: 38px;
    width: auto;
    object-fit: contain;
    display: block;
}

.logo-text-group {
    display: flex;
    flex-direction: column;
}

.logo-company-name {
    font-size: 1.1875rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--color-bg-navy);
    line-height: 1.2;
}

.logo-tagline {
    font-size: 0.6875rem;
    font-family: var(--font-mono);
    color: var(--color-accent);
    font-weight: 600;
    letter-spacing: 0.04em;
}

.nav-desktop {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 24px;
}

.nav-item {
    position: relative;
}

.nav-link {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-text-main);
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 4px;
    transition: var(--transition-base);
}

.nav-link:hover, .nav-item.active .nav-link, .has-megamenu.is-expanded .nav-link, .has-megamenu.is-open .nav-link {
    color: var(--color-primary);
}

.nav-link-dropdown {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    font-size: inherit;
    font-weight: inherit;
    line-height: inherit;
    text-align: left;
}

@media (min-width: 1025px) {
    .nav-link-dropdown {
        width: auto;
        justify-content: flex-start;
    }
}

.nav-link-badge {
    font-size: 0.6875rem;
    font-weight: 700;
    background-color: var(--color-accent-subtle);
    color: var(--color-accent);
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid var(--color-border-accent);
}

/* メガメニュー: ホバー & クリック(.is-expanded / .is-open)で表示 */
.has-megamenu:hover .megamenu-panel,
.has-megamenu.is-expanded .megamenu-panel,
.has-megamenu.is-open .megamenu-panel {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
}

.has-megamenu:hover .chevron-icon,
.has-megamenu.is-expanded .chevron-icon,
.has-megamenu.is-open .chevron-icon {
    transform: rotate(180deg);
}

.megamenu-panel {
    position: absolute;
    top: 100%;
    left: -120px;
    width: 680px;
    background-color: var(--color-bg-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: 24px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition-base);
    z-index: 1010;
    pointer-events: none;
}

/* ホバーブリッジ（マウス移動中の切断防止） */
.megamenu-panel::before {
    content: '';
    position: absolute;
    top: -15px;
    left: 0;
    right: 0;
    height: 15px;
}

.megamenu-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.megamenu-card {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px;
    border-radius: var(--radius-md);
    background-color: var(--color-bg-light);
    border: 1px solid transparent;
    transition: var(--transition-base);
}

.megamenu-card:hover {
    background-color: #ffffff;
    border-color: var(--color-border);
    box-shadow: var(--shadow-sm);
    transform: translateY(-2px);
}

.megamenu-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.1), rgba(16, 185, 129, 0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    flex-shrink: 0;
}

.megamenu-title {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-text-main);
    margin-bottom: 2px;
}

.megamenu-desc {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    line-height: 1.4;
}

.nav-link-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.megamenu-toggle-btn {
    display: none;
    background: transparent;
    border: none;
    padding: 6px;
    color: var(--color-text-muted);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: var(--transition-base);
}

.megamenu-toggle-btn:hover {
    color: var(--color-primary);
    background-color: #f1f5f9;
}

.chevron-icon {
    transition: transform 0.25s ease;
}

.has-megamenu.is-expanded .chevron-icon {
    transform: rotate(180deg);
}

/* ヘッダー右側アクション */
.header-right-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-cta-btn {
    padding: 9px 18px;
    font-size: 0.875rem;
    border-radius: var(--radius-md);
}

.header-cta-desktop {
    display: inline-flex;
}

.header-cta-mobile {
    display: none;
}

/* モバイルハンバーガーボタン */
.mobile-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 42px;
    height: 42px;
    background: #f8fafc;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    padding: 0;
    color: var(--color-bg-navy);
    transition: var(--transition-base);
}

.hamburger-bar {
    display: block;
    width: 20px;
    height: 2px;
    background-color: var(--color-bg-navy);
    border-radius: 2px;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.mobile-toggle.is-active .hamburger-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.mobile-toggle.is-active .hamburger-bar:nth-child(2) {
    opacity: 0;
}

.mobile-toggle.is-active .hamburger-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ドロワー内ヘッダー & フッター (デフォルト非表示、モバイル時表示) */
.drawer-header {
    display: none;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 16px;
    margin-bottom: 12px;
    border-bottom: 1px solid var(--color-border);
}

.drawer-title {
    font-size: 1.0625rem;
    font-weight: 800;
    color: var(--color-bg-navy);
}

.drawer-close-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 6px;
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
}

.drawer-close-btn:hover {
    color: var(--color-bg-navy);
    background: #f1f5f9;
}

.drawer-footer-actions {
    display: none;
}

/* 背景オーバーレイ */
.nav-backdrop {
    display: none;
}

/* ==========================================================================
   フッター & 構造化エリア
   ========================================================================== */
.site-footer {
    background-color: var(--color-bg-navy);
    color: var(--color-text-light);
    padding-top: 80px;
    padding-bottom: 40px;
    border-top: 1px solid var(--color-border-dark);
}

.footer-top {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 60px;
}

.footer-company-lead {
    font-size: 0.875rem;
    color: var(--color-text-light-muted);
    margin-top: 16px;
    margin-bottom: 24px;
    line-height: 1.7;
}

.footer-nav-title {
    font-size: 0.9375rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-nav-title::before {
    content: '';
    display: inline-block;
    width: 3px;
    height: 14px;
    background-color: var(--color-accent);
    border-radius: 2px;
}

.footer-nav-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-nav-link {
    font-size: 0.875rem;
    color: var(--color-text-light-muted);
    transition: var(--transition-base);
}

.footer-nav-link:hover {
    color: #ffffff;
    transform: translateX(4px);
}

.footer-survey-note {
    background-color: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--color-border-dark);
    padding: 20px;
    border-radius: var(--radius-md);
    margin-bottom: 40px;
}

.footer-survey-note p {
    font-size: 0.8125rem;
    color: var(--color-text-light-muted);
    line-height: 1.7;
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.8125rem;
    color: var(--color-text-light-muted);
}

.footer-bottom-links {
    display: flex;
    gap: 24px;
}

/* ==========================================================================
   共通コンバージョン CTA セクション (cta.php)
   ========================================================================== */
.section-cta {
    background: linear-gradient(135deg, #0a1128 0%, #0f172a 100%);
    color: #ffffff;
    position: relative;
    overflow: hidden;
}

.cta-grid-bg {
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(30, 64, 175, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(5, 150, 105, 0.12) 0%, transparent 40%),
        linear-gradient(to right, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 100% 100%, 100% 100%, 40px 40px, 40px 40px;
    pointer-events: none;
}

.cta-content-box {
    position: relative;
    z-index: 2;
    background-color: rgba(15, 23, 42, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-xl);
    padding: 60px 48px;
    box-shadow: var(--shadow-xl);
}

.cta-header {
    text-align: center;
    max-width: 780px;
    margin: 0 auto 40px auto;
}

.cta-main-copy {
    font-size: 2.25rem;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 16px;
    color: #ffffff;
}

.cta-sub-copy {
    font-size: 1.0625rem;
    color: var(--color-text-light-muted);
    line-height: 1.8;
}

.cta-actions-row {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-bottom: 32px;
}

.cta-trust-items {
    display: flex;
    justify-content: center;
    gap: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: 24px;
    font-size: 0.8125rem;
    color: var(--color-text-light-muted);
    flex-wrap: wrap;
}

.cta-trust-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.cta-trust-item svg {
    color: var(--color-accent-light);
}

/* ==========================================================================
   パンくずリスト & ページタイトル
   ========================================================================== */
.page-hero {
    background-color: var(--color-bg-navy);
    color: #ffffff;
    padding-top: 60px;
    padding-bottom: 70px;
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--color-border-dark);
}

.breadcrumb-nav {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8125rem;
    color: var(--color-text-light-muted);
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.breadcrumb-separator {
    color: rgba(255, 255, 255, 0.3);
}

.breadcrumb-current {
    color: #ffffff;
    font-weight: 600;
}

.page-hero-title {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.3;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.page-hero-desc {
    font-size: 1.125rem;
    color: var(--color-text-light-muted);
    max-width: 820px;
    line-height: 1.8;
}

/* ==========================================================================
   レスポンシブメディアクエリ
   ========================================================================== */
@media (max-width: 1024px) {
    .megamenu-panel {
        width: 580px;
        left: -200px;
    }
    .footer-top {
        grid-template-columns: 1fr 1fr;
        gap: 36px;
    }
    .section-title {
        font-size: 1.875rem;
    }
}

/* ==========================================================================
   TOPページ専用ビジュアルスタイル
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. HERO セクション (仕様書第10項: 統合ビジュアル)
   -------------------------------------------------------------------------- */
.section-hero {
    position: relative;
    padding-top: 60px;
    padding-bottom: 90px;
    background: radial-gradient(circle at 10% 20%, rgba(30, 64, 175, 0.05) 0%, transparent 50%),
                radial-gradient(circle at 90% 80%, rgba(16, 185, 129, 0.04) 0%, transparent 50%),
                #f8fafc;
    overflow: hidden;
    border-bottom: 1px solid var(--color-border);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 48px;
    align-items: center;
}

.hero-content-col {
    display: flex;
    flex-direction: column;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-accent);
    background-color: var(--color-accent-subtle);
    border: 1px solid var(--color-border-accent);
    padding: 5px 12px;
    border-radius: 9999px;
    width: fit-content;
    margin-bottom: 20px;
}

.hero-title {
    font-size: 2.85rem;
    font-weight: 900;
    line-height: 1.25;
    letter-spacing: -0.03em;
    color: var(--color-bg-navy);
    margin-bottom: 20px;
}

.hero-title .highlight {
    color: var(--color-primary);
    position: relative;
    display: inline-block;
}

.hero-lead-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-main);
    line-height: 1.6;
    margin-bottom: 12px;
}

.hero-sub-text {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    line-height: 1.8;
    margin-bottom: 32px;
}

.hero-domains-strip {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 36px;
}

.domain-pill {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    background: #ffffff;
    border: 1px solid var(--color-border);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    color: var(--color-bg-navy);
    box-shadow: var(--shadow-sm);
}

/* 統合ビジュアルステージ */
.hero-visual-stage {
    position: relative;
    width: 100%;
}

.hero-composite-board {
    background: #0f172a;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-xl);
    padding: 24px;
    box-shadow: 0 20px 40px -10px rgba(15, 23, 42, 0.4);
    position: relative;
    overflow: hidden;
}

.hero-flow-diagram-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: 10px 14px;
    margin-bottom: 16px;
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    color: #94a3b8;
}

.hero-flow-item {
    font-weight: 700;
    color: #ffffff;
}

.hero-flow-arrow {
    color: var(--color-accent-light);
}

.hero-composite-layers {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.composite-layer-card {
    background: rgba(30, 41, 59, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: 14px 16px;
    display: flex;
    align-items: center;
    gap: 16px;
    position: relative;
    backdrop-filter: blur(8px);
}

.composite-layer-card.highlight-layer {
    border-color: rgba(16, 185, 129, 0.4);
    background: linear-gradient(90deg, rgba(16, 185, 129, 0.1) 0%, rgba(30, 41, 59, 0.9) 100%);
}

.layer-indicator {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    background: #0f172a;
    border: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #38bdf8;
    flex-shrink: 0;
}

.layer-info {
    flex: 1;
}

.layer-info-title {
    font-size: 0.8125rem;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 2px;
}

.layer-info-desc {
    font-size: 0.75rem;
    color: #94a3b8;
    line-height: 1.4;
}

.layer-tag {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    color: var(--color-accent-light);
    background: rgba(16, 185, 129, 0.15);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
}

/* --------------------------------------------------------------------------
   2. AI × 現場 (仕様書第14項: 3つの利用シーン)
   -------------------------------------------------------------------------- */
.scenes-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.scene-card {
    background: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    transition: var(--transition-base);
}

.scene-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary-light);
}

.scene-image-container {
    position: relative;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background: #0f172a;
}

.scene-image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.scene-card:hover .scene-image-container img {
    transform: scale(1.05);
}

.scene-badge-overlay {
    position: absolute;
    top: 14px;
    left: 14px;
    background: rgba(15, 23, 42, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #ffffff;
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    backdrop-filter: blur(4px);
}

.scene-ai-hud-tag {
    position: absolute;
    bottom: 14px;
    right: 14px;
    background: rgba(5, 150, 105, 0.9);
    color: #ffffff;
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: 6px;
}

.scene-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.scene-title {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--color-bg-navy);
    margin-bottom: 8px;
}

.scene-desc {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    line-height: 1.7;
    margin-bottom: 20px;
}

.scene-tech-strip {
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px dashed var(--color-border);
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.scene-tech-tag {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-primary);
    background: #eff6ff;
    padding: 3px 8px;
    border-radius: var(--radius-sm);
}

/* --------------------------------------------------------------------------
   3. 開発事例ハイライト (仕様書第17項)
   -------------------------------------------------------------------------- */
.cases-highlight-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.case-card {
    background: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    transition: var(--transition-base);
}

.case-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary-light);
}

.case-thumb-wrap {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
}

.case-thumb-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.case-card-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.case-category-tag {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 8px;
}

.case-title {
    font-size: 1.0625rem;
    font-weight: 800;
    color: var(--color-bg-navy);
    line-height: 1.4;
    margin-bottom: 12px;
}

.case-summary {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    margin-bottom: 16px;
}

.case-arch-flow-box {
    background: var(--color-bg-light);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    font-size: 0.75rem;
    color: var(--color-text-main);
    margin-bottom: 16px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.case-arch-label {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    font-weight: 700;
    color: var(--color-text-subtle);
}

.case-tags-row {
    margin-top: auto;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.case-tech-chip {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    font-weight: 600;
    background: #f1f5f9;
    padding: 2px 6px;
    border-radius: 4px;
}

/* ==========================================================================
   レスポンシブメディアクエリ & モバイル最適化
   仕様書第38項・第45項 準拠
   ========================================================================== */

/* 基本リセット強化: スマホ横スクロール防止 */
html, body {
    overflow-x: hidden;
    max-width: 100vw;
}

body.menu-open {
    overflow: hidden;
    height: 100vh;
}

/* 汎用レスポンシブユーティリティ */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-bottom: 24px;
}

.grid-responsive-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.grid-responsive-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.grid-responsive-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

/* --------------------------------------------------------------------------
   1. タブレット / 中画面 (max-width: 1024px)
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
    /* ヘッダーボタンの切り替え */
    .header-cta-desktop {
        display: none !important;
    }
    .header-cta-mobile {
        display: inline-flex !important;
        padding: 8px 14px;
        font-size: 0.8125rem;
    }
    .mobile-toggle {
        display: flex !important;
        position: relative;
        z-index: 1360;
        pointer-events: auto;
    }

    /* モバイルドロワーナビゲーション */
    .nav-desktop {
        position: fixed;
        top: 0;
        right: 0;
        width: min(380px, 86vw);
        height: 100vh;
        height: 100dvh;
        background-color: #ffffff;
        box-shadow: -8px 0 36px rgba(15, 23, 42, 0.25);
        z-index: 1350;
        transform: translateX(100%);
        transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
        display: flex;
        flex-direction: column;
        align-items: stretch;
        padding: 24px 20px 32px 20px;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        gap: 0;
        pointer-events: auto;
    }

    .nav-desktop.is-open {
        transform: translateX(0);
    }

    /* ドロワーヘッダー */
    .drawer-header {
        display: flex;
        margin-bottom: 16px;
    }

    .drawer-close-btn {
        pointer-events: auto;
        cursor: pointer;
    }

    /* 背景オーバーレイ */
    .nav-backdrop {
        display: block;
        position: fixed;
        inset: 0;
        background-color: rgba(15, 23, 42, 0.65);
        backdrop-filter: blur(4px);
        -webkit-backdrop-filter: blur(4px);
        z-index: 1250;
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition: opacity 0.3s ease, visibility 0.3s ease;
    }

    .nav-backdrop.is-open {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }

    /* ドロワーメニューリスト */
    .nav-menu {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        width: 100%;
    }

    .nav-item {
        border-bottom: 1px solid #f1f5f9;
        width: 100%;
    }

    .nav-link {
        padding: 14px 4px;
        font-size: 1rem;
        color: var(--color-bg-navy);
        font-weight: 700;
    }

    .megamenu-toggle-btn {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    /* モバイルアコーディオンメガメニュー */
    .has-megamenu .megamenu-panel {
        position: static;
        width: 100%;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        padding: 4px 0 16px 0;
        display: none;
        background: transparent;
    }

    .has-megamenu.is-expanded .megamenu-panel,
    .has-megamenu.is-open .megamenu-panel {
        display: block !important;
    }

    .megamenu-grid {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .megamenu-card {
        padding: 10px 12px;
        background: #f8fafc;
        border: 1px solid var(--color-border);
        border-radius: var(--radius-md);
    }

    /* ドロワー下部フッター */
    .drawer-footer-actions {
        display: flex;
        flex-direction: column;
        gap: 12px;
        margin-top: 24px;
        padding-top: 20px;
        border-top: 2px solid #f1f5f9;
    }

    .drawer-btn-cta {
        width: 100%;
        padding: 13px;
        font-size: 0.9375rem;
    }

    .drawer-btn-line {
        width: 100%;
        padding: 12px;
        font-size: 0.875rem;
        background: #06c755;
        color: #ffffff;
        border-color: #06c755;
        font-weight: 700;
        border-radius: var(--radius-md);
    }
    .drawer-btn-line:hover {
        background: #05b04b;
        color: #ffffff;
    }

    .drawer-contact-info {
        text-align: center;
        margin-top: 8px;
        font-size: 0.8125rem;
        color: var(--color-text-muted);
    }

    .drawer-tel-link {
        font-size: 1.25rem;
        font-weight: 800;
        font-family: var(--font-mono);
        color: var(--color-bg-navy);
        display: inline-block;
        margin-top: 2px;
    }

    /* ヒーロー＆グリッド */
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .hero-visual {
        max-width: 640px;
        margin: 0 auto;
        width: 100%;
    }

    .services-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .scenes-grid {
        grid-template-columns: 1fr;
    }

    .cases-highlight-grid {
        grid-template-columns: 1fr;
    }

    .grid-responsive-3 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-responsive-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-top {
        grid-template-columns: 1fr 1fr;
        gap: 40px 24px;
    }
}

/* --------------------------------------------------------------------------
   2. スマートフォン (max-width: 768px)
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    /* コンテナ & パディング */
    .site-container {
        padding-left: 16px;
        padding-right: 16px;
    }

    .header-inner {
        height: 64px;
    }

    .site-logo {
        gap: 10px;
    }

    .site-logo svg, .site-logo img {
        height: 32px !important;
    }

    .logo-company-name {
        font-size: 1.0625rem;
    }

    .logo-tagline {
        font-size: 0.625rem;
    }

    .section-wrapper {
        padding-top: 52px;
        padding-bottom: 52px;
    }

    .section-wrapper-sm {
        padding-top: 36px;
        padding-bottom: 36px;
    }

    .section-header {
        margin-bottom: 32px;
    }

    .section-title {
        font-size: 1.625rem;
        line-height: 1.35;
    }

    .section-lead {
        font-size: 0.9375rem;
        line-height: 1.7;
    }

    /* ヒーローセクション */
    .hero-section {
        padding-top: 36px;
        padding-bottom: 48px;
    }

    .hero-title {
        font-size: 1.875rem;
        line-height: 1.3;
    }

    .hero-lead-text {
        font-size: 1rem;
        line-height: 1.7;
        margin-bottom: 24px;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }

    .hero-actions .btn {
        width: 100%;
        padding: 14px 20px;
    }

    /* ヒーロー右側ボードのスマホ最適化 */
    .hero-composite-board {
        padding: 16px 12px;
    }
    .hero-flow-diagram-bar {
        font-size: 0.5625rem;
        padding: 8px 10px;
        gap: 2px;
    }
    .composite-layer-card {
        padding: 12px 10px;
        gap: 10px;
    }
    .layer-info-title {
        font-size: 0.8125rem;
    }
    .layer-info-desc {
        font-size: 0.6875rem;
    }
    .layer-tag {
        display: none;
    }

    /* ページヒーロー */
    .page-hero {
        padding-top: 32px;
        padding-bottom: 36px;
    }

    .page-hero-title {
        font-size: 1.75rem;
    }

    .page-hero-desc {
        font-size: 0.9375rem;
        line-height: 1.7;
    }

    /* サービスグリッド & カード */
    .services-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .service-card {
        padding: 24px 20px;
    }

    /* 汎用グリッドの1カラム化 */
    .grid-responsive-2,
    .grid-responsive-3,
    .grid-responsive-4 {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    /* フッター */
    .site-footer {
        padding-top: 52px;
        padding-bottom: 32px;
    }

    .footer-top {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    /* 会社概要テーブルのスマホ最適化 (カード化) */
    .table-company-info th,
    .table-company-info td {
        display: block;
        width: 100% !important;
        box-sizing: border-box;
    }

    .table-company-info th {
        padding: 10px 14px;
        background: #f1f5f9;
        font-size: 0.8125rem;
        border-bottom: none;
    }

    .table-company-info td {
        padding: 10px 14px 16px 14px;
        font-size: 0.9375rem;
    }

    /* お問い合わせフォームのスマホ最適化 */
    .form-group-split {
        grid-template-columns: 1fr !important;
        gap: 16px !important;
    }

    .contact-channels-grid {
        grid-template-columns: 1fr !important;
        gap: 16px !important;
    }

    .form-input, .form-select, .form-textarea {
        font-size: 16px !important; /* iOS自動ズーム防止 */
        padding: 12px 14px;
    }

    .form-submit-btn {
        width: 100%;
        padding: 16px 20px;
        font-size: 1rem;
    }

    /* 農業AIモック＆IoTパイプライン */
    .agri-demo-grid {
        grid-template-columns: 1fr !important;
        gap: 28px !important;
    }

    .agri-demo-grid .phone-mock-frame {
        margin: 0 auto;
        max-width: 320px;
    }

    .agri-step-card {
        width: 100% !important;
    }

    /* モバイルカード内パディング最適化 */
    .contact-form-card,
    .mission-philosophy-card {
        padding: 30px 18px !important;
    }
}

/* --------------------------------------------------------------------------
   3. 超小型スマートフォン (max-width: 480px)
   -------------------------------------------------------------------------- */
@media (max-width: 480px) {
    .site-container {
        padding-left: 14px;
        padding-right: 14px;
    }

    .logo-company-name {
        font-size: 1rem;
    }

    .logo-tagline {
        display: none;
    }

    .header-cta-mobile {
        padding: 6px 10px;
        font-size: 0.75rem;
    }

    .hero-title {
        font-size: 1.625rem;
    }

    .btn {
        padding: 12px 18px;
        font-size: 0.875rem;
    }

    .contact-form-card,
    .mission-philosophy-card {
        padding: 22px 14px !important;
    }
}

/* 農業AIデモ用基本グリッド */
.agri-demo-grid {
    display: grid;
    grid-template-columns: 360px 1fr;
    gap: 40px;
}