/* 
  ちいほとせ - デザインシステム & スタイル
  Concept: Warm, gentle, inspiring creative studio
*/

/* -------------------------------------------------------------
   1. 変数定義 & 基本リセット
------------------------------------------------------------- */
:root {
    /* カラーシステム */
    --color-bg-main: #FAFAFA;
    --color-bg-warm: #FFFDF9;
    --color-text-main: #4A3E3D; /* 温かみのあるダークブラウングレー */
    --color-text-muted: #807270;
    
    /* テーマアクセント */
    --color-green: #8FA960;
    --color-green-light: #F4F8F3;
    --color-green-dark: #6C8243;
    
    --color-blue: #70A2BE;
    --color-blue-light: #F2F7F9;
    --color-blue-dark: #507C96;
    
    --color-purple: #9478B8;
    --color-purple-light: #F5F2F9;
    --color-purple-dark: #745799;

    --color-yellow: #F7D070;
    --color-pink: #F5A3A3;
    --color-lightyellow: #FCEFB4;
    
    /* フォントシステム */
    --font-sans: 'Zen Maru Gothic', sans-serif;
    --font-serif: 'Shippori Mincho', serif;
    
    /* アニメーション & シャドウ */
    --transition-smooth: all 0.4s cubic-bezier(0.25, 1, 0.5, 1);
    --shadow-soft: 0 10px 30px rgba(74, 62, 61, 0.04);
    --shadow-medium: 0 16px 48px rgba(74, 62, 61, 0.08);
    --shadow-card-hover: 0 24px 60px rgba(74, 62, 61, 0.12);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background-color: var(--color-bg-main);
    color: var(--color-text-main);
    font-family: var(--font-sans);
    line-height: 1.8;
    letter-spacing: 0.05em;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

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

/* -------------------------------------------------------------
   2. 共通ボタン・コンポーネント
------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    border-radius: 30px;
    font-weight: 500;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
}

.btn-contact {
    background-color: var(--color-green);
    color: #FFFFFF;
    box-shadow: 0 4px 12px rgba(143, 169, 96, 0.3);
}

.btn-contact:hover {
    background-color: var(--color-green-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(143, 169, 96, 0.4);
}

.btn-icon {
    width: 18px;
    height: 18px;
}

/* -------------------------------------------------------------
   3. ヘッダー
------------------------------------------------------------- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(250, 250, 250, 0.85);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid rgba(74, 62, 61, 0.05);
    transition: var(--transition-smooth);
}

.site-header.scrolled {
    background-color: #FFFFFF;
    box-shadow: 0 2px 20px rgba(74, 62, 61, 0.04);
    padding: 8px 0;
}

.header-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 36px;
    height: 36px;
    transition: var(--transition-smooth);
}

.header-logo:hover .logo-icon {
    transform: rotate(-10deg) scale(1.1);
}

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

.logo-main {
    font-family: var(--font-sans);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-text-main);
    letter-spacing: 0.1em;
}

.logo-sub {
    font-size: 0.65rem;
    color: var(--color-text-muted);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-top: -2px;
}

/* ナビゲーション */
.header-nav {
    margin-left: auto;
    margin-right: 32px;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 24px;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-main);
    padding: 8px 4px;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--color-green);
    transition: var(--transition-smooth);
    transform: translateX(-50%);
    border-radius: 2px;
}

.nav-link:hover {
    color: var(--color-green);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

.nav-link.active {
    color: var(--color-green);
}

/* モバイルメニューボタン */
.mobile-nav-toggle {
    display: none;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 10px;
}

.hamburger-bar {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-text-main);
    margin: 5px 0;
    transition: var(--transition-smooth);
}

/* -------------------------------------------------------------
   4. ヒーローセクション
------------------------------------------------------------- */
.hero-section {
    position: relative;
    min-height: 550px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 120px 24px 60px;
    background: radial-gradient(circle at 10% 20%, rgba(244, 248, 243, 0.7) 0%, rgba(255, 253, 249, 1) 50%, rgba(242, 247, 249, 0.7) 100%);
}

/* 全幅ヒーロー（新レイアウト） */
.hero-section.hero-fullwidth {
    padding: 0;
    min-height: auto;
    display: block;
    background: none;
}

.hero-bg-wrapper {
    position: relative;
    width: 100%;
    min-height: 540px;
    overflow: hidden;
    /* ヘッダー分の上部パディング */
    padding-top: 72px;
}

.hero-bg-img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    min-height: 540px;
    object-position: left center;
}

/* テキストを画像の右側中央エリアに重ねる */
.hero-overlay-content {
    position: absolute;
    top: 50%;
    /* 画像の左側にオブジェクトがあるため、右~中央に配置 */
    right: 4%;
    width: 46%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    animation: fadeInUp 1.2s ease-out 0.2s backwards;
    padding: 24px;
    /* 半透明の白い背景で可読性を確保 */
    background: rgba(255, 253, 249, 0.65);
    backdrop-filter: blur(4px);
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(74, 62, 61, 0.05);
}

.hero-container {
    position: relative;
    z-index: 3;
    max-width: 1140px;
    width: 100%;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: center;
}

.hero-left {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInUp 1.2s ease-out;
}

.hero-window-img {
    max-width: 100%;
    height: auto;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(74, 62, 61, 0.04);
}

.hero-right {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
    animation: fadeInUp 1.2s ease-out 0.2s backwards;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 3.5vw, 2.8rem);
    font-weight: 700;
    line-height: 1.5;
    margin-bottom: 24px;
    color: var(--color-text-main);
    letter-spacing: 0.1em;
}

.hero-title .title-line {
    display: block;
}

.hero-title .text-blue {
    color: #588CA8;
    margin-top: 4px;
}

.hero-subtext {
    font-size: clamp(0.95rem, 1.5vw, 1.05rem);
    line-height: 2;
    color: var(--color-text-main);
    margin-bottom: 24px;
    font-weight: 400;
}

/* スクロール案内 */
.scroll-indicator {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--color-text-muted);
}

.scroll-text {
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    font-weight: 500;
}

.scroll-arrow {
    width: 18px;
    height: 18px;
    animation: bounce 2s infinite;
}

/* -------------------------------------------------------------
   5. サービスカードセクション
------------------------------------------------------------- */
.services-section {
    padding: 100px 24px;
    background-color: #FFFFFF;
}

.section-container {
    max-width: 1140px;
    margin: 0 auto;
}

.section-title {
    font-family: var(--font-sans);
    font-size: 1.8rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    letter-spacing: 0.1em;
}

.title-leaf {
    width: 24px;
    height: 24px;
    color: var(--color-green);
}

.title-leaf.leaf-left {
    transform: scaleX(-1) rotate(-15deg);
}

.title-leaf.leaf-right {
    transform: rotate(-15deg);
}

/* カードグリッド */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

/* 個別カード */
.service-card {
    display: flex;
    flex-direction: column;
    background-color: var(--color-bg-warm);
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(74, 62, 61, 0.05);
    position: relative;
    padding: 32px 24px;
    transition: var(--transition-smooth);
    cursor: pointer;
}

/* アイコンラッパー */
.card-icon-wrapper {
    position: absolute;
    top: 24px;
    left: 24px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 5;
}

.card-icon {
    width: 24px;
    height: 24px;
}

/* アイコン個別色 */
.circle-green { background-color: #E9F2E6; color: var(--color-green); }
.circle-blue { background-color: #E6F0F5; color: var(--color-blue); }
.circle-purple { background-color: #EBE6F2; color: var(--color-purple); }

/* 画像コンテナ */
.card-image-container {
    width: 100%;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 16px;
    margin-bottom: 24px;
    overflow: hidden;
}

.card-img {
    height: 100%;
    width: auto;
    object-fit: contain;
    transition: var(--transition-smooth);
}

/* カードテキスト */
.card-body {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    text-align: center;
}

.card-title {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: 0.05em;
}

/* タイトル個別色 */
.text-green { color: var(--color-green-dark); }
.text-blue { color: var(--color-blue-dark); }
.text-purple { color: var(--color-purple-dark); }

.card-description {
    font-size: 0.9rem;
    line-height: 1.8;
    color: var(--color-text-muted);
    margin-bottom: 32px;
    flex-grow: 1;
    text-align: justify;
    text-justify: inter-character;
}

/* カード内ボタン */
.card-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    border-radius: 24px;
    font-size: 0.9rem;
    font-weight: 500;
    width: 100%;
    margin-top: auto;
    background-color: transparent;
    transition: var(--transition-smooth);
}

.btn-arrow {
    width: 16px;
    height: 16px;
    transition: var(--transition-smooth);
}

.btn-atelier-border { border: 1px solid var(--color-green); color: var(--color-green-dark); }
.btn-web-border { border: 1px solid var(--color-blue); color: var(--color-blue-dark); }
.btn-ics-border { border: 1px solid var(--color-purple); color: var(--color-purple-dark); }

/* ホバー時の挙動 */
.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-card-hover);
}

/* 各カード個別のホバー背景変化 */
.card-atelier:hover { background-color: var(--color-green-light); border-color: rgba(143, 169, 96, 0.2); }
.card-web:hover { background-color: var(--color-blue-light); border-color: rgba(112, 162, 190, 0.2); }
.card-ics:hover { background-color: var(--color-purple-light); border-color: rgba(148, 120, 184, 0.2); }

.service-card:hover .card-img {
    transform: scale(1.06);
}

.service-card:hover .btn-arrow {
    transform: translateX(4px);
}

/* カード内ボタンホバー塗りつぶし */
.card-atelier:hover .btn-atelier-border { background-color: var(--color-green); color: #FFFFFF; }
.card-web:hover .btn-web-border { background-color: var(--color-blue); color: #FFFFFF; }
.card-ics:hover .btn-ics-border { background-color: var(--color-purple); color: #FFFFFF; }

/* カード下テキスト */
.services-footer-text {
    margin-top: 64px;
    text-align: center;
    font-size: 0.95rem;
    color: var(--color-text-muted);
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.inline-leaf {
    width: 18px;
    height: 18px;
    color: var(--color-green);
    opacity: 0.6;
}

.services-footer-text svg:first-child {
    transform: scaleX(-1) rotate(-15deg);
}

.services-footer-text svg:last-child {
    transform: rotate(-15deg);
}

/* -------------------------------------------------------------
   6. コンセプトセクション
------------------------------------------------------------- */
.concept-section {
    padding: 100px 24px;
    background-color: var(--color-bg-warm);
    border-top: 1px solid rgba(74, 62, 61, 0.03);
    border-bottom: 1px solid rgba(74, 62, 61, 0.03);
}

.concept-layout {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 48px;
    align-items: center;
}

.concept-section-title {
    font-family: var(--font-sans);
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.6;
    color: var(--color-text-main);
    letter-spacing: 0.1em;
}

.concept-section-title .highlight-num {
    font-size: 3rem;
    color: var(--color-green);
    font-family: var(--font-serif);
    position: relative;
    display: inline-block;
    margin: 0 4px;
}

.concept-flow {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.concept-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    flex: 1;
}

.concept-icon-circle {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 6px 20px rgba(74, 62, 61, 0.05);
    margin-bottom: 16px;
    transition: var(--transition-smooth);
}

.concept-svg {
    width: 32px;
    height: 32px;
}

.concept-node:hover .concept-icon-circle {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 10px 24px rgba(74, 62, 61, 0.1);
}

/* コンセプト個別色 */
.bg-yellow { background-color: #FDF4E3; color: #E5A93C; }
.bg-pink { background-color: #FDF0F0; color: #DF6C6C; }
.bg-green { background-color: #EBF3EB; color: #649664; }
.bg-lightyellow { background-color: #FEFCED; color: #DAB02A; }
.bg-blue { background-color: #EBF4F8; color: #528AA5; }

.concept-node-title {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.concept-node-desc {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    white-space: nowrap;
}

/* 矢印 */
.concept-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    color: var(--color-text-muted);
    opacity: 0.4;
}

.dotted-arrow {
    width: 24px;
    height: 24px;
}

/* -------------------------------------------------------------
   7. お知らせ & ちいほとせについて セクション
------------------------------------------------------------- */
.info-section {
    padding: 100px 24px;
    background-color: #FFFFFF;
}

.grid-two-columns {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 64px;
}

/* お知らせ */
.news-column {
    display: flex;
    flex-direction: column;
}

.column-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 32px;
    border-bottom: 2px solid rgba(74, 62, 61, 0.05);
    padding-bottom: 12px;
}

.column-title {
    font-size: 1.4rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
}

.title-butterfly {
    width: 22px;
    height: 22px;
    color: #7AA5C2;
}

.btn-more-link {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-green-dark);
}

.btn-more-link:hover {
    color: var(--color-green);
    transform: translateX(4px);
}

.news-list {
    list-style: none;
    margin-bottom: 32px;
}

.news-item {
    display: flex;
    padding: 16px 8px;
    border-bottom: 1px dashed rgba(74, 62, 61, 0.08);
    font-size: 0.95rem;
}

.news-item:last-child {
    border-bottom: none;
}

.news-date {
    font-family: var(--font-sans);
    font-weight: 500;
    color: var(--color-text-muted);
    width: 120px;
    flex-shrink: 0;
}

.news-text {
    color: var(--color-text-main);
    transition: var(--transition-smooth);
}

.news-item:hover .news-text {
    color: var(--color-green-dark);
    padding-left: 4px;
}

/* イラスト */
.news-illustration {
    margin-top: auto;
    display: flex;
    justify-content: center;
    padding-top: 16px;
}

.fox-tree-img {
    max-height: 180px;
    width: auto;
    object-fit: contain;
}

/* ちいほとせについて (付箋風カード) */
.about-column {
    display: flex;
    align-items: center;
}

.about-card-paper {
    background-color: var(--color-bg-warm);
    border-radius: 4px;
    box-shadow: 
        1px 1px 3px rgba(74, 62, 61, 0.05),
        -5px 12px 30px rgba(74, 62, 61, 0.04);
    border: 1px solid rgba(74, 62, 61, 0.03);
    width: 100%;
    position: relative;
    padding: 48px 36px;
    transform: rotate(1deg);
    transition: var(--transition-smooth);
}

/* めくれた紙の折り目表現 */
.about-card-paper::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 0;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 0 0 24px 24px;
    border-color: transparent transparent var(--color-bg-main) transparent;
    box-shadow: -3px -3px 5px rgba(74, 62, 61, 0.04);
    transition: var(--transition-smooth);
}

.about-card-paper:hover {
    transform: rotate(-0.5deg) translateY(-5px);
    box-shadow: 
        1px 1px 4px rgba(74, 62, 61, 0.08),
        -10px 20px 40px rgba(74, 62, 61, 0.08);
}

.about-card-title {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--color-text-main);
}

.inline-leaf-mini {
    width: 16px;
    height: 16px;
    color: var(--color-green);
    transform: rotate(-15deg);
}

.about-card-text {
    font-size: 0.95rem;
    line-height: 1.9;
    color: var(--color-text-muted);
    margin-bottom: 36px;
}

.about-card-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 28px;
    border-radius: 24px;
    border: 1px solid var(--color-text-muted);
    color: var(--color-text-main);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-smooth);
}

.about-card-btn:hover {
    background-color: var(--color-text-main);
    color: #FFFFFF;
    border-color: var(--color-text-main);
}

.about-card-btn:hover .btn-arrow {
    transform: translateX(4px);
}

/* -------------------------------------------------------------
   8. フッター
------------------------------------------------------------- */
.site-footer {
    background-color: var(--color-bg-warm);
    border-top: 1px solid rgba(74, 62, 61, 0.05);
    position: relative;
    padding-top: 60px;
}

/* 花畑のような装飾ボーダー */
.footer-flower-border {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 10px;
    background: linear-gradient(90deg, 
        #E9F2E6 0%, #FFFDF9 25%, #E6F0F5 50%, #EBE6F2 75%, #E9F2E6 100%);
    opacity: 0.6;
}

.footer-container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 48px 24px;
}

.footer-columns {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-title {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 24px;
    position: relative;
    padding-bottom: 8px;
    color: var(--color-text-main);
}

.footer-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 32px;
    height: 2px;
    background-color: var(--color-green);
    border-radius: 2px;
}

/* SNS */
.sns-icons {
    display: flex;
    gap: 16px;
}

.sns-icon-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background-color: #FFFFFF;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(74, 62, 61, 0.04);
    border: 1px solid rgba(74, 62, 61, 0.05);
    color: var(--color-text-muted);
}

.sns-icon-btn svg {
    width: 20px;
    height: 20px;
}

.sns-icon-btn:hover {
    color: #FFFFFF;
    transform: translateY(-3px);
}

.sns-icon-btn.yt:hover { background-color: #FF0000; border-color: #FF0000; }
.sns-icon-btn.ig:hover { background-color: #E1306C; border-color: #E1306C; }
.sns-icon-btn.x:hover { background-color: #000000; border-color: #000000; }
.sns-icon-btn.line:hover { background-color: #06C755; border-color: #06C755; }

/* リンク */
.footer-links-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.footer-links-list {
    list-style: none;
}

.footer-links-list li {
    margin-bottom: 12px;
}

.footer-links-list a {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.footer-links-list a:hover {
    color: var(--color-green-dark);
    padding-left: 4px;
}

/* お問い合わせ */
.footer-contact-col {
    display: flex;
    flex-direction: column;
}

.footer-contact-text {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 20px;
}

.footer-cta-wrapper {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    position: relative;
}

.btn-footer-contact {
    flex-shrink: 0;
    z-index: 2;
}

/* ウサギイラスト */
.rabbit-illustration {
    position: absolute;
    right: -10px;
    bottom: -15px;
    width: 100px;
    z-index: 1;
    pointer-events: none;
}

.rabbit-img {
    width: 100%;
    height: auto;
}

/* コピーライト */
.footer-bottom {
    border-top: 1px solid rgba(74, 62, 61, 0.05);
    padding-top: 24px;
    text-align: center;
}

.copyright {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.privacy-link {
    color: var(--color-text-muted);
    font-size: 0.8rem;
    text-decoration: none;
    transition: var(--transition-smooth);
}

.privacy-link:hover {
    color: var(--color-green-dark);
}

/* -------------------------------------------------------------
   9. レスポンシブ設計 (メディアクエリ)
------------------------------------------------------------- */

/* タブレットサイズ (1024px以下) */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
    
    .services-grid > :last-child {
        grid-column: span 2;
        max-width: 50%;
        margin: 0 auto;
        width: 100%;
    }

    .concept-layout {
        grid-template-columns: 1fr;
        gap: 32px;
        text-align: center;
    }

    .concept-section-title {
        font-size: 1.8rem;
    }

    .footer-columns {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }

    .footer-contact-col {
        grid-column: span 2;
        max-width: 450px;
    }
}

/* モバイル / スマホサイズ (768px以下) */
@media (max-width: 768px) {
    body {
        line-height: 1.7;
    }

    /* ヘッダー・スマホ開閉 */
    .mobile-nav-toggle {
        display: block;
        z-index: 1100;
    }

    .header-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 75%;
        max-width: 300px;
        height: 100vh;
        background-color: #FFFFFF;
        box-shadow: -4px 0 20px rgba(74, 62, 61, 0.08);
        padding: 100px 32px 32px;
        z-index: 1050;
        transition: right 0.4s ease;
    }

    .header-nav.open {
        right: 0;
    }

    .nav-list {
        flex-direction: column;
        gap: 24px;
    }

    .nav-link {
        font-size: 1.1rem;
        display: block;
        padding: 8px 0;
    }

    .header-cta {
        display: none; /* スマホではヘッダーのCTAを隠しフッターや本文の誘導に任せる */
    }

    /* モバイル時のハンバーガーアニメーション */
    .mobile-nav-toggle[aria-expanded="true"] .hamburger-bar:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .mobile-nav-toggle[aria-expanded="true"] .hamburger-bar:nth-child(2) {
        opacity: 0;
    }

    .mobile-nav-toggle[aria-expanded="true"] .hamburger-bar:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    body.no-scroll {
        overflow: hidden;
    }

    /* ヒーロー */
    .hero-section {
        padding: 100px 16px 40px;
        min-height: auto;
    }

    /* 全幅ヒーロー モバイル対応 */
    .hero-section.hero-fullwidth {
        padding: 0;
    }

    .hero-bg-wrapper {
        min-height: 400px;
        padding-top: 64px;
    }

    .hero-bg-img {
        min-height: 400px;
        object-position: 20% center;
    }

    .hero-overlay-content {
        position: absolute;
        top: 50%;
        right: 50%;
        transform: translate(50%, -50%);
        width: 88%;
        background: rgba(255, 253, 249, 0.82);
        backdrop-filter: blur(6px);
        padding: 20px 16px;
    }

    .hero-container {
        grid-template-columns: 1fr;
        gap: 32px;
        text-align: center;
    }

    .hero-left {
        order: 1;
    }

    .hero-right {
        order: 2;
        align-items: center;
        text-align: center;
    }

    .hero-window-img {
        max-width: 85%;
    }

    .hero-title {
        font-size: 1.6rem;
    }

    .hero-subtext {
        font-size: 0.85rem;
        line-height: 1.8;
    }

    /* サービスカード */
    .services-section {
        padding: 64px 16px;
    }

    .section-title {
        font-size: 1.4rem;
        margin-bottom: 40px;
    }

    .services-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .services-grid > :last-child {
        grid-column: span 1;
        max-width: 100%;
    }

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

    .card-image-container {
        height: 160px;
    }

    .services-footer-text {
        font-size: 0.85rem;
        flex-direction: column;
        gap: 4px;
    }

    /* コンセプト・フロー */
    .concept-section {
        padding: 64px 16px;
    }

    .concept-flow {
        flex-direction: column;
        gap: 16px;
    }

    .concept-node {
        width: 100%;
    }

    .concept-arrow {
        transform: rotate(90deg);
        height: 32px;
        width: auto;
    }

    /* お知らせ ＆ ちいほとせについて */
    .info-section {
        padding: 64px 16px;
    }

    .grid-two-columns {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .news-date {
        width: 100px;
    }

    .news-text {
        font-size: 0.85rem;
    }

    .about-card-paper {
        padding: 32px 24px;
    }

    /* フッター */
    .footer-columns {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .footer-contact-col {
        grid-column: span 1;
    }

    .footer-links-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
}

/* -------------------------------------------------------------
   10. アニメーションキーフレーム
------------------------------------------------------------- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-6px);
    }
    60% {
        transform: translateY(-3px);
    }
}