/* =================================
   リセットとベーススタイル
   ================================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* カラーパレット - BtoB向け高級感 */
    --color-primary: #1a2332;
    --color-secondary: #2d3e50;
    --color-accent: #c9a96e;
    --color-gold: #d4af37;
    --color-white: #ffffff;
    --color-off-white: #f8f9fa;
    --color-light-gray: #e8eaed;
    --color-gray: #6c757d;
    --color-dark-gray: #343a40;
    --color-overlay: rgba(26, 35, 50, 0.7);
    
    /* タイポグラフィ */
    --font-primary: 'Noto Sans JP', sans-serif;
    --font-display: 'Cormorant Garamond', serif;
    
    /* スペーシング */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* トランジション */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* シャドウ */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
}

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

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

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

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

/* =================================
   コンテナとレイアウト
   ================================= */
.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

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

.section-dark {
    background-color: var(--color-primary);
    color: var(--color-white);
}

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

.section-subtitle {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 0.875rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-sm);
}

.section-description {
    font-size: 1.125rem;
    color: var(--color-gray);
    max-width: 600px;
    margin: 0 auto;
}

.section-dark .section-description {
    color: rgba(255, 255, 255, 0.8);
}

/* =================================
   ヘッダー
   ================================= */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.logo a {
    text-decoration: none;
    transition: opacity var(--transition-normal);
}

.logo a:hover {
    opacity: 0.8;
}

.logo h1 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--color-primary);
}

.logo-subtitle {
    font-size: 0.625rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-top: 0.25rem;
}

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

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-primary);
    padding: 0.5rem 0;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: var(--transition-normal);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-link-cta {
    background-color: var(--color-accent);
    color: var(--color-white);
    padding: 0.5rem 1.5rem;
    border-radius: 4px;
}

.nav-link-cta::after {
    display: none;
}

.nav-link-cta:hover {
    background-color: var(--color-gold);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-primary);
    cursor: pointer;
}

/* モバイルメニュー */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background-color: var(--color-white);
    box-shadow: var(--shadow-lg);
    z-index: 2000;
    padding: var(--spacing-md);
    transition: right var(--transition-normal);
}

.mobile-menu.active {
    right: 0;
}

.mobile-menu-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-primary);
    cursor: pointer;
    margin-bottom: var(--spacing-md);
}

.mobile-nav {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.mobile-nav-link {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-primary);
    padding: var(--spacing-sm);
    border-bottom: 1px solid var(--color-light-gray);
}

/* =================================
   ファーストビュー
   ================================= */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(26, 35, 50, 0.85) 0%, rgba(45, 62, 80, 0.75) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: var(--color-white);
    max-width: 800px;
    padding: var(--spacing-md);
}

.hero-subtitle {
    font-family: var(--font-display);
    font-size: 0.875rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.hero-description {
    font-size: 1.25rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.hero-features {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-feature-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
}

.hero-feature-item i {
    color: var(--color-accent);
}

.hero-scroll {
    position: absolute;
    bottom: var(--spacing-md);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-white);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    animation: bounce 2s infinite;
    opacity: 0.7;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* =================================
   ボタン
   ================================= */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 4px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition-normal);
    text-align: center;
}

.btn-primary {
    background-color: var(--color-accent);
    color: var(--color-white);
    border-color: var(--color-accent);
}

.btn-primary:hover {
    background-color: var(--color-gold);
    border-color: var(--color-gold);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-white);
    border-color: var(--color-white);
}

.btn-secondary:hover {
    background-color: var(--color-white);
    color: var(--color-primary);
}

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

.btn-outline:hover {
    background-color: var(--color-accent);
    color: var(--color-white);
}

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

/* =================================
   課題提起セクション
   ================================= */
.challenges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-md);
}

.challenge-card {
    background-color: var(--color-white);
    padding: var(--spacing-md);
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    text-align: center;
}

.challenge-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.challenge-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-accent), var(--color-gold));
    border-radius: 50%;
    font-size: 2rem;
    color: var(--color-white);
}

.challenge-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.challenge-card p {
    font-size: 0.95rem;
    color: var(--color-gray);
    line-height: 1.6;
}

/* =================================
   解決策セクション
   ================================= */
.solution-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.solution-items {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.solution-item {
    position: relative;
    padding-left: 4rem;
}

.solution-number {
    position: absolute;
    left: 0;
    top: 0;
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--color-accent);
    opacity: 0.3;
}

.solution-item h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-white);
}

.solution-item p {
    font-size: 0.95rem;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.85);
}

.solution-gallery {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
}

.solution-gallery-item {
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    max-height: 400px;
}

.solution-gallery-item img {
    width: 100%;
    max-height: 400px;
    object-fit: cover;
    transition: var(--transition-slow);
}

.solution-gallery-item:hover img {
    transform: scale(1.05);
}

/* =================================
   サービス内容セクション
   ================================= */
.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-md);
}

.service-card {
    background-color: var(--color-off-white);
    padding: var(--spacing-md);
    border-radius: 8px;
    transition: var(--transition-normal);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.service-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-accent);
    border-radius: 8px;
    font-size: 1.75rem;
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
}

.service-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.service-card p {
    font-size: 0.95rem;
    color: var(--color-gray);
    line-height: 1.7;
}

/* =================================
   価格プランセクション
   ================================= */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.pricing-card {
    background-color: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: var(--spacing-md);
    text-align: center;
    transition: var(--transition-normal);
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-accent);
    box-shadow: 0 12px 40px rgba(201, 169, 110, 0.2);
}

.pricing-card-featured {
    border-color: var(--color-accent);
    background-color: rgba(201, 169, 110, 0.08);
    transform: scale(1.05);
}

.pricing-card-featured:hover {
    transform: scale(1.05) translateY(-8px);
}

.pricing-featured-label {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--color-accent), var(--color-gold));
    color: var(--color-white);
    padding: 0.25rem 1rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.1em;
}

.pricing-badge {
    display: inline-block;
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--color-white);
    padding: 0.375rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.05em;
}

.pricing-badge-premium {
    background-color: var(--color-accent);
}

.pricing-badge-signature {
    background: linear-gradient(135deg, var(--color-gold), var(--color-accent));
}

.pricing-title {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-white);
}

.pricing-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
}

.price-currency {
    font-size: 1.5rem;
    color: var(--color-accent);
    margin-right: 0.25rem;
}

.price-amount {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-white);
}

.price-unit {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.7);
    margin-left: 0.25rem;
}

.pricing-description {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.pricing-features {
    list-style: none;
    margin-bottom: var(--spacing-md);
    text-align: left;
}

.pricing-features li {
    padding: 0.5rem 0;
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.pricing-features i {
    color: var(--color-accent);
    font-size: 0.875rem;
}

.pricing-note {
    text-align: center;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
    font-style: italic;
}

/* =================================
   提供価値セクション
   ================================= */
.value-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.value-image {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    max-height: 500px;
}

.value-image img {
    width: 100%;
    max-height: 500px;
    object-fit: cover;
}

.value-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.value-item {
    display: flex;
    gap: var(--spacing-sm);
}

.value-icon {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-accent);
    border-radius: 50%;
    font-size: 1.25rem;
    color: var(--color-white);
}

.value-text h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.value-text p {
    font-size: 0.95rem;
    color: var(--color-gray);
    line-height: 1.7;
}

/* =================================
   安心ポイントセクション
   ================================= */
.security-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-md);
}

.security-card {
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-md);
    border-radius: 8px;
    transition: var(--transition-normal);
}

.security-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
}

.security-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-accent);
    border-radius: 8px;
    font-size: 1.75rem;
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
}

.security-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-white);
}

.security-card p {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.7;
}

/* =================================
   購入オプションセクション
   ================================= */
.purchase-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.purchase-intro {
    font-size: 1.05rem;
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
    color: var(--color-gray);
}

.purchase-example {
    background-color: var(--color-off-white);
    padding: var(--spacing-md);
    border-radius: 8px;
    border-left: 4px solid var(--color-accent);
}

.purchase-example h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.purchase-calc {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin: var(--spacing-sm) 0;
}

.purchase-calc-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
}

.calc-label {
    font-size: 0.95rem;
    color: var(--color-gray);
}

.calc-value {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-primary);
}

.calc-highlight {
    font-size: 1.5rem;
    color: var(--color-accent);
}

.calc-discount {
    color: #28a745;
}

.purchase-calc-divider {
    height: 1px;
    background-color: var(--color-light-gray);
    margin: var(--spacing-xs) 0;
}

.purchase-note {
    font-size: 0.875rem;
    color: var(--color-gray);
    font-style: italic;
    margin-top: var(--spacing-sm);
}

.purchase-image {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    max-height: 500px;
}

.purchase-image img {
    width: 100%;
    max-height: 500px;
    object-fit: cover;
}

/* =================================
   導入フローセクション
   ================================= */
.flow-timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.flow-timeline::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--color-accent), var(--color-gold));
}

.flow-item {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.flow-number {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-accent), var(--color-gold));
    border-radius: 50%;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-white);
    position: relative;
    z-index: 1;
}

.flow-content {
    flex: 1;
    padding-top: 0.5rem;
}

.flow-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-white);
}

.flow-content p {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.7;
}

/* =================================
   アーティスト紹介セクション
   ================================= */
.artist-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.artist-image {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 100px;
    max-height: 600px;
}

.artist-image img {
    width: 100%;
    max-height: 600px;
    object-fit: cover;
}

.artist-bio h3 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.artist-intro {
    font-size: 1.05rem;
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
    color: var(--color-gray);
}

.artist-highlights {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.artist-highlight {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background-color: var(--color-off-white);
    border-radius: 8px;
    border-left: 4px solid var(--color-accent);
}

.artist-highlight i {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-accent);
    border-radius: 50%;
    color: var(--color-white);
    font-size: 1.125rem;
    margin-top: 0.25rem;
}

.artist-highlight h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
}

.artist-highlight p {
    font-size: 0.95rem;
    color: var(--color-gray);
    line-height: 1.7;
}

.artist-message {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-md);
    border-radius: 8px;
    margin-bottom: var(--spacing-md);
}

.artist-message h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-accent);
}

.artist-message p {
    font-size: 0.95rem;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.9);
}

.artist-company {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 2px solid var(--color-accent);
}

.artist-company p {
    font-size: 1rem;
    color: var(--color-primary);
}

/* =================================
   お問い合わせセクション
   ================================= */
.contact-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-lg);
}

.contact-info h3 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.contact-method {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.contact-method i {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-accent);
    border-radius: 50%;
    font-size: 1.25rem;
    color: var(--color-white);
}

.contact-method h4 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: rgba(255, 255, 255, 0.7);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.contact-method a {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-white);
}

.contact-method a:hover {
    color: var(--color-accent);
}

.contact-cta-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.contact-note {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
    font-style: italic;
}

.contact-features {
    background-color: rgba(255, 255, 255, 0.05);
    padding: var(--spacing-md);
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.contact-features h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-white);
}

.contact-features ul {
    list-style: none;
}

.contact-features li {
    padding: 0.5rem 0;
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.85);
    display: flex;
    align-items: start;
    gap: 0.5rem;
}

.contact-features i {
    color: var(--color-accent);
    margin-top: 0.25rem;
    font-size: 0.875rem;
}

/* =================================
   フッター
   ================================= */
.footer {
    background-color: #0f1419;
    color: var(--color-white);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand a {
    text-decoration: none;
    transition: opacity var(--transition-normal);
}

.footer-brand a:hover {
    opacity: 0.8;
}

.footer-brand h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-white);
}

.footer-brand p {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0.25rem;
}

.footer-company {
    color: var(--color-accent) !important;
    font-weight: 600;
    margin-top: var(--spacing-sm) !important;
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-column h4 {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
    color: var(--color-accent);
}

.footer-column ul {
    list-style: none;
}

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

.footer-column a {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
}

.footer-bottom p {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.5);
}

/* =================================
   レスポンシブデザイン
   ================================= */

/* タブレット */
@media (max-width: 992px) {
    .section-title {
        font-size: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .solution-content,
    .value-content,
    .purchase-content,
    .artist-content {
        grid-template-columns: 1fr;
    }
    
    .artist-image {
        position: static;
        max-height: 450px;
    }
    
    .solution-gallery-item,
    .value-image,
    .purchase-image {
        max-height: 350px;
    }
    
    .solution-gallery-item img,
    .value-image img,
    .purchase-image img,
    .artist-image img {
        max-height: 350px;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-card-featured {
        transform: scale(1);
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

/* モバイル */
@media (max-width: 768px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
    
    .nav {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .hero {
        min-height: 500px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .challenges-grid,
    .service-grid,
    .security-grid {
        grid-template-columns: 1fr;
    }
    
    .flow-timeline::before {
        left: 20px;
    }
    
    .flow-number {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    /* モバイルでの画像サイズ最適化 */
    .solution-gallery-item,
    .value-image,
    .purchase-image,
    .artist-image {
        max-height: 300px;
    }
    
    .solution-gallery-item img,
    .value-image img,
    .purchase-image img,
    .artist-image img {
        max-height: 300px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .price-amount {
        font-size: 2.25rem;
    }
    
    /* 小型モバイルでの画像サイズ最適化 */
    .solution-gallery-item,
    .value-image,
    .purchase-image,
    .artist-image {
        max-height: 250px;
    }
    
    .solution-gallery-item img,
    .value-image img,
    .purchase-image img,
    .artist-image img {
        max-height: 250px;
    }
}

/* SPのみ表示 */
.sp-only {
    display: none;
}

@media (max-width: 768px) {
    .sp-only {
        display: inline;
    }
}