/* ========================================
   グローバルスタイル & リセット
   ======================================== */
:root {
    /* カラーパレット */
    --primary-color: #2d7f3e;
    --primary-light: #3a9d51;
    --primary-dark: #1f5c2d;
    --secondary-color: #f4a261;
    --accent-color: #e76f51;
    --success-color: #52b788;
    --dark-color: #1a1a1a;
    --light-color: #f8f9fa;
    --text-dark: #2c3e50;
    --text-light: #6c757d;
    --border-color: #dee2e6;
    
    /* グラデーション */
    --gradient-primary: linear-gradient(135deg, #2d7f3e 0%, #52b788 100%);
    --gradient-warm: linear-gradient(135deg, #f4a261 0%, #e76f51 100%);
    --gradient-overlay: linear-gradient(180deg, rgba(0,0,0,0.5) 0%, rgba(0,0,0,0.3) 100%);
    
    /* スペーシング */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* フォント */
    --font-primary: 'Noto Sans JP', sans-serif;
    --font-accent: 'M PLUS Rounded 1c', sans-serif;
    
    /* トランジション */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* シャドウ */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.2);
    --shadow-xl: 0 16px 48px rgba(0,0,0,0.25);

    /* ヒーローパララックス（front.js が document.documentElement へ設定） */
    --hero-parallax: 0px;
    --hero-opacity: 1;

    /* 固定ナビの実効高（ヒーロー余白・アンカー scroll-padding と同期） */
    --nav-height: 80px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    /* 固定ヘッダー分を除いて #アンカー先が隠れないようにする */
    scroll-padding-top: var(--nav-height);
}

body {
    font-family: var(--font-primary);
    line-height: 1.7;
    color: var(--text-dark);
    background-color: var(--light-color);
    overflow-x: hidden;
}

body.nav-menu-open {
    overflow: hidden;
}

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

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

ul {
    list-style: none;
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

/* ========================================
   コンテナ & レイアウト
   ======================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

section {
    padding: var(--spacing-xl) 0;
}

/* ========================================
   ナビゲーション
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition-base);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: var(--nav-height);
    padding-top: 0;
    padding-bottom: 0;
}

.nav-brand a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-accent);
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--primary-color);
}

.nav-brand .site-logo {
    width: 80px;
    height: 80px;
    display: block;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 44px;
    min-width: 44px;
    height: 44px;
    min-height: 44px;
    padding: 0;
    border: none;
    background: transparent;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2.5px;
    background: var(--primary-color);
    border-radius: 2px;
    transition: transform 0.25s ease, opacity 0.2s ease;
    transform-origin: center;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-link {
    font-weight: 500;
    color: var(--text-dark);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: var(--transition-fast);
}

.nav-link:hover {
    color: var(--primary-color);
    background: rgba(45, 127, 62, 0.1);
}

.nav-link.active {
    color: var(--primary-color);
    background: rgba(45, 127, 62, 0.12);
}

.btn-nav {
    background: var(--gradient-primary);
    color: white !important;
    font-weight: 600;
    padding: 0.75rem 1.5rem !important;
}

.btn-nav:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ========================================
   ヒーローセクション
   ======================================== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 700px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    /* section 共通の縦 padding を打ち消し。margin だとその分 body 色が見えるので padding でナビ分を確保 */
    padding-top: var(--nav-height);
    padding-bottom: 0;
    margin-top: 0;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #2d7f3e 0%, #52b788 50%, #95d5b2 100%);
    z-index: -2;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(255,255,255,0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255,255,255,0.1) 0%, transparent 50%);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-overlay);
    z-index: -1;
}

.hero-content {
    text-align: center;
    color: white;
    z-index: 1;
    max-width: 900px;
    padding: var(--spacing-md);
    transform: translateY(var(--hero-parallax));
    opacity: var(--hero-opacity);
}

.hero-title {
    font-family: var(--font-accent);
    font-size: 4rem;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    text-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.hero-title .highlight {
    background: var(--gradient-warm);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

.hero-subtitle {
    font-size: 1.5rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
    text-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* アニメーション */
.fade-in {
    animation: fadeInUp 1s ease;
}

.fade-in-delay {
    animation: fadeInUp 1s ease 0.3s both;
}

.fade-in-delay-2 {
    animation: fadeInUp 1s ease 0.6s both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-md);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: white;
    font-size: 0.875rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
}

/* ========================================
   ボタンスタイル
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    font-weight: 600;
    border-radius: 50px;
    transition: all var(--transition-base);
    cursor: pointer;
    text-align: center;
    font-size: 1rem;
}

.btn-large {
    padding: 1.25rem 2.5rem;
    font-size: 1.125rem;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid white;
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-3px);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

/* ========================================
   セクション共通スタイル
   ======================================== */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-family: var(--font-accent);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.title-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50%;
    font-size: 1.75rem;
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto;
}

/* ========================================
   コミュニティ紹介セクション
   ======================================== */
.about {
    background: white;
}

.about-content {
    max-width: 1000px;
    margin: 0 auto;
}

.about-text {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.about-card {
    background: var(--light-color);
    padding: var(--spacing-md);
    border-radius: 20px;
    transition: var(--transition-base);
    border: 2px solid transparent;
}

.about-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.card-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 70px;
    height: 70px;
    background: var(--gradient-primary);
    color: white;
    border-radius: 20px;
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.about-card h3 {
    font-family: var(--font-accent);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.about-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* ========================================
   活動内容セクション
   ======================================== */
.activities {
    background: var(--light-color);
}

.activities-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

.activity-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

.activity-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.activity-image {
    height: 200px;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 5rem;
    transition: transform var(--transition-base);
}

.activity-card:hover .activity-image {
    transform: scale(1.1);
}

.activity-content {
    padding: var(--spacing-md);
}

.activity-content h3 {
    font-family: var(--font-accent);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.activity-content p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.activity-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    display: inline-block;
    padding: 0.375rem 0.875rem;
    background: rgba(45, 127, 62, 0.1);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

/* ========================================
   特典セクション
   ======================================== */
.benefits {
    background: white;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

.benefit-card {
    background: var(--light-color);
    padding: var(--spacing-md);
    border-radius: 20px;
    text-align: center;
    transition: var(--transition-base);
    border: 2px solid transparent;
}

.benefit-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
    background: white;
}

.benefit-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50%;
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.benefit-card h3 {
    font-family: var(--font-accent);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.benefit-card p {
    color: var(--text-light);
    line-height: 1.7;
}

/* ========================================
   プランセクション
   ======================================== */
.plans {
    background: var(--light-color);
}

.plans-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
    max-width: 1100px;
    margin: 0 auto var(--spacing-lg);
}

.plan-card {
    background: white;
    border-radius: 30px;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    transition: var(--transition-base);
    position: relative;
    border: 3px solid transparent;
}

.plan-card:hover {
    box-shadow: var(--shadow-xl);
}

.plan-featured {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-xl);
}

.plan-badge {
    position: absolute;
    top: -15px;
    right: 30px;
    background: var(--gradient-warm);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.875rem;
}

.plan-header {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.plan-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50%;
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.plan-featured .plan-icon {
    background: var(--gradient-warm);
}

.plan-name {
    font-family: var(--font-accent);
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.plan-description {
    color: var(--text-light);
    font-size: 1rem;
}

.plan-price {
    text-align: center;
    margin: var(--spacing-md) 0;
    padding: var(--spacing-md) 0;
    border-top: 2px solid var(--border-color);
    border-bottom: 2px solid var(--border-color);
}

.plan-price .currency {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-light);
}

.plan-price .amount {
    font-size: 3rem;
    font-weight: 900;
    color: var(--primary-color);
    font-family: var(--font-accent);
}

.plan-price .period {
    font-size: 1.25rem;
    color: var(--text-light);
}

.plan-save {
    text-align: center;
    background: var(--gradient-warm);
    color: white;
    padding: 0.75rem;
    border-radius: 15px;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.plan-features {
    margin: var(--spacing-md) 0;
}

.plan-features li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.75rem 0;
    color: var(--text-dark);
}

.plan-features i {
    color: var(--success-color);
    font-size: 1.25rem;
    flex-shrink: 0;
    margin-top: 0.125rem;
}

.plan-communities {
    margin: var(--spacing-md) 0;
    padding: var(--spacing-md);
    background: var(--light-color);
    border-radius: 15px;
}

.plan-communities h4 {
    font-family: var(--font-accent);
    font-size: 1rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.community-options {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.community-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-light);
}

.community-badge.active {
    background: var(--gradient-primary);
    color: white;
    border-color: var(--primary-color);
}

.plan-card .btn {
    width: 100%;
    justify-content: center;
    margin-top: var(--spacing-md);
}

.plan-note {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-md);
    background: white;
    border-radius: 15px;
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    box-shadow: var(--shadow-sm);
}

.plan-note i {
    color: var(--primary-color);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.plan-note p {
    color: var(--text-light);
    line-height: 1.7;
}

/* ========================================
   CTAセクション
   ======================================== */
.cta {
    background: var(--gradient-primary);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(255,255,255,0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255,255,255,0.1) 0%, transparent 50%);
}

.cta-content {
    position: relative;
    z-index: 1;
}

.cta-title {
    font-family: var(--font-accent);
    font-size: 3rem;
    font-weight: 900;
    margin-bottom: var(--spacing-md);
}

.cta-text {
    font-size: 1.25rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ========================================
   FAQセクション
   ======================================== */
.faq {
    background: white;
}

.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: var(--light-color);
    border-radius: 15px;
    margin-bottom: var(--spacing-sm);
    overflow: hidden;
    transition: var(--transition-base);
}

.faq-item:hover {
    box-shadow: var(--shadow-md);
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    font-family: var(--font-accent);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--primary-color);
    text-align: left;
    cursor: pointer;
    transition: var(--transition-fast);
}

.faq-question:hover {
    background: rgba(45, 127, 62, 0.05);
}

.faq-question i {
    transition: var(--transition-fast);
    font-size: 1rem;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 var(--spacing-md) var(--spacing-md);
    color: var(--text-light);
    line-height: 1.8;
}

/* ========================================
   フッター
   ======================================== */
.footer {
    background: var(--dark-color);
    color: white;
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-brand {
    max-width: 400px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-accent);
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
}

.footer-logo .site-logo-footer {
    width: 32px;
    height: 32px;
    display: block;
    opacity: 0.95;
}

.footer-description {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
}

.footer-column h4 {
    font-family: var(--font-accent);
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-light);
}

.footer-column ul li {
    margin-bottom: 0.5rem;
}

.footer-column ul li a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition-fast);
}

.footer-column ul li a:hover {
    color: white;
    padding-left: 5px;
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    font-size: 1.25rem;
    transition: var(--transition-fast);
}

.social-links a:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.5);
}

/* ========================================
   トップへ戻るボタン
   ======================================== */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
    z-index: 999;
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* ========================================
   レスポンシブデザイン
   ======================================== */
@media (max-width: 990px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .cta-title {
        font-size: 2.5rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .plans-container {
        grid-template-columns: 1fr;
        max-width: 500px;
    }

    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
        --nav-height: 80px;
    }
    
    .navbar .container {
        position: relative;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        align-items: stretch;
        padding: 0;
        margin: 0;
        list-style: none;
        box-shadow: var(--shadow-lg);
        max-height: 0;
        overflow: hidden;
        opacity: 0;
        visibility: hidden;
        transition: max-height 0.35s ease, opacity 0.25s ease, visibility 0.25s;
        border-top: 1px solid var(--border-color);
    }
    
    .nav-menu.active {
        max-height: 80vh;
        opacity: 1;
        visibility: visible;
    }
    
    .nav-menu li {
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-menu .nav-link {
        display: block;
        padding: 1rem 1.25rem;
        text-align: left;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: translateY(7.5px) rotate(45deg);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: translateY(-7.5px) rotate(-45deg);
    }
    
    .hero {
        min-height: 600px;
        margin-top: 0;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }
    
    .section-title {
        font-size: 1.75rem;
        flex-direction: column;
    }
    
    .title-icon {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }
    
    .section-subtitle {
        font-size: 1.125rem;
    }
    
    .about-text,
    .activities-grid,
    .benefits-grid,
    .plans-container,
    .footer-content,
    .footer-links {
        grid-template-columns: 1fr;
    }

    .plans-container {
        max-width: 500px;
    }
    
    .cta-title {
        font-size: 2rem;
    }
    
    .cta-text {
        font-size: 1.125rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    
    .plans-container {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .plan-price .amount {
        font-size: 2.5rem;
    }
    
    .btn-large {
        padding: 1rem 2rem;
        font-size: 1rem;
    }
}

/* ========================================
   スクロール表示（IntersectionObserver + front.js）
   ======================================== */
.js-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.js-reveal.is-revealed {
    opacity: 1;
    transform: translateY(0);
}