/* ====================
   グローバル設定
==================== */
:root {
    --primary-color: #D4AF37;
    --primary-dark: #B8941E;
    --secondary-color: #1a1a1a;
    --text-color: #333;
    --text-light: #666;
    --bg-light: #f8f8f8;
    --bg-white: #ffffff;
    --border-color: #e0e0e0;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.2);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Noto Sans JP', sans-serif;
    color: var(--text-color);
    line-height: 1.7;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Noto Serif JP', serif;
    font-weight: 600;
}

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

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

/* ====================
   共通コンポーネント
==================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--secondary-color);
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-dark));
}

/* ボタンスタイル */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
}

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

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

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

.btn-large {
    padding: 1.2rem 2.5rem;
    font-size: 1.1rem;
}

.btn-xlarge {
    padding: 1.5rem 3rem;
    font-size: 1.2rem;
}

/* ====================
   ヘッダー
==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    padding: 1rem 0;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    font-size: 1.8rem;
    color: var(--primary-color);
    letter-spacing: 2px;
}

.logo-subtitle {
    font-size: 0.8rem;
    color: var(--text-light);
    margin-top: 0.2rem;
}

.header-cta-btn {
    padding: 0.8rem 1.5rem;
    background: var(--primary-color);
    color: white;
    border-radius: 50px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.header-cta-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

/* ====================
   ヒーローセクション
==================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 50%, #1a1a1a 100%);
    color: white;
    padding: 100px 20px 50px;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(212, 175, 55, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(212, 175, 55, 0.1) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    background: rgba(212, 175, 55, 0.2);
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 2rem;
    letter-spacing: 1px;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #FFD700, #FFA500, #FFD700);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 3px;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 2rem;
    font-family: 'Noto Serif JP', serif;
    font-style: italic;
    letter-spacing: 2px;
}

.hero-description {
    font-size: 1.2rem;
    line-height: 1.8;
    margin-bottom: 3rem;
    color: rgba(255, 255, 255, 0.9);
}

.hero-designer {
    margin-bottom: 3rem;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    border: 1px solid rgba(212, 175, 55, 0.3);
}

.hero-designer p:first-child {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0.5rem;
}

.hero-designer h3 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.designer-info {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.8);
}

.hero-cta {
    margin-top: 3rem;
}

.hero-price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-top: 2rem;
}

.tax-note {
    font-size: 1rem;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.7);
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 1.5rem;
    color: var(--primary-color);
    animation: bounce 2s infinite;
}

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

/* ====================
   ビデオセクション
==================== */
.video-section {
    padding: 5rem 0;
    background: var(--bg-white);
}

.video-wrapper {
    max-width: 900px;
    margin: 0 auto;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.product-video {
    width: 100%;
    display: block;
}

/* ====================
   ギャラリーセクション
==================== */
.gallery {
    padding: 5rem 0;
    background: var(--bg-light);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.gallery-item {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.gallery-item.main-image {
    grid-column: span 1;
}

.gallery-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    color: white;
    padding: 2rem 1.5rem 1rem;
    font-size: 1rem;
}

/* ====================
   商品詳細セクション
==================== */
.product-details {
    padding: 5rem 0;
    background: var(--bg-white);
}

.details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.detail-card {
    background: var(--bg-light);
    padding: 2.5rem 2rem;
    border-radius: 20px;
    text-align: center;
    transition: var(--transition);
    border: 2px solid transparent;
}

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

.detail-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.detail-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

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

/* ====================
   特徴セクション
==================== */
.features {
    padding: 5rem 0;
    background: var(--bg-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
}

.feature-item {
    background: var(--bg-white);
    padding: 3rem 2rem;
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.feature-number {
    display: inline-block;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.feature-item h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

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

/* ====================
   デザイナーセクション
==================== */
.designer {
    padding: 5rem 0;
    background: var(--bg-white);
}

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

.designer-profile-grid {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 3rem;
    align-items: center;
}

.designer-image-wrapper {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.designer-image {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

.designer-info-box {
    background: var(--bg-light);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
}

.designer-info-box h3 {
    font-size: 2rem;
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
}

.designer-stats {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: var(--bg-white);
    border-radius: 15px;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-color);
    font-weight: 600;
}

.stat-item i {
    color: #FF0000;
    font-size: 1.5rem;
}

.designer-description {
    line-height: 1.9;
    color: var(--text-color);
    margin-bottom: 2rem;
}

.designer-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

/* ====================
   注文セクション
==================== */
.order-section {
    padding: 5rem 0;
    background: linear-gradient(135deg, #1a1a1a, #2d2d2d);
    color: white;
}

.order-section .section-title {
    color: white;
}

.order-section .section-title::after {
    background: linear-gradient(90deg, var(--primary-color), var(--primary-dark));
}

.order-box {
    max-width: 800px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(212, 175, 55, 0.3);
    border-radius: 30px;
    padding: 3rem;
}

.price-display {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem;
    background: rgba(212, 175, 55, 0.1);
    border-radius: 20px;
}

.price-label {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 1rem;
}

.price-amount {
    font-size: 4rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.price-tax {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.7);
}

.order-info {
    margin-bottom: 3rem;
}

.order-info h3 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.order-list {
    list-style: none;
}

.order-list li {
    padding: 0.8rem 0;
    display: flex;
    align-items: center;
    gap: 1rem;
    color: rgba(255, 255, 255, 0.9);
}

.order-list i {
    color: var(--primary-color);
    font-size: 1.2rem;
}

.order-cta {
    text-align: center;
}

.order-note {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
}

/* ====================
   お問い合わせフォーム
==================== */
.contact-form {
    padding: 5rem 0;
    background: var(--bg-light);
}

.contact-intro {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 3rem;
}

.form {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-white);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.required {
    color: #e74c3c;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.checkbox-group label {
    flex-direction: row;
    align-items: center;
    cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    margin-right: 0.5rem;
    cursor: pointer;
}

.form-submit {
    text-align: center;
    margin-top: 2rem;
}

.form-message {
    margin-top: 1.5rem;
    padding: 1rem;
    border-radius: 10px;
    text-align: center;
    display: none;
}

.form-message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
    display: block;
}

.form-message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    display: block;
}

/* ====================
   会社情報セクション
==================== */
.company-info {
    padding: 5rem 0;
    background: var(--bg-white);
}

.company-content {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-light);
    padding: 3rem;
    border-radius: 20px;
}

.company-content h3 {
    font-size: 1.8rem;
    color: var(--secondary-color);
    margin-bottom: 2rem;
    text-align: center;
}

.company-details {
    margin-bottom: 2rem;
}

.company-details p {
    padding: 0.8rem 0;
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--text-color);
    line-height: 1.8;
}

.company-details i {
    color: var(--primary-color);
    font-size: 1.2rem;
    width: 20px;
}

.company-details a {
    color: var(--primary-color);
}

.company-details a:hover {
    text-decoration: underline;
}

.payment-info {
    margin-top: 2rem;
    padding: 2rem;
    background: var(--bg-white);
    border-radius: 15px;
    border-left: 4px solid var(--primary-color);
}

.payment-info h4 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--secondary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.payment-info p {
    color: var(--text-light);
}

/* ====================
   フッター
==================== */
.footer {
    background: var(--secondary-color);
    color: white;
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-brand h3 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    letter-spacing: 2px;
}

.footer-brand p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
}

.footer-links {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}

/* ====================
   レスポンシブデザイン
==================== */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .hero-designer h3 {
        font-size: 1.3rem;
    }

    .hero-price {
        font-size: 2rem;
    }

    .section-title {
        font-size: 2rem;
    }

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

    .features-grid,
    .details-grid {
        grid-template-columns: 1fr;
    }

    .designer-profile-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .designer-image-wrapper {
        max-width: 400px;
        margin: 0 auto;
    }

    .form {
        padding: 2rem 1.5rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        flex-direction: column;
        gap: 1rem;
    }

    .header-content {
        flex-direction: column;
        gap: 1rem;
    }

    .btn-large,
    .btn-xlarge {
        padding: 1rem 2rem;
        font-size: 1rem;
    }

    .order-box {
        padding: 2rem 1.5rem;
    }

    .price-amount {
        font-size: 3rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

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

    .price-amount {
        font-size: 2.5rem;
    }

    .designer-links {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}

/* ====================
   アニメーション
==================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.8s ease-out;
}

/* スムーススクロール */
html {
    scroll-behavior: smooth;
}

/* 選択テキストの色 */
::selection {
    background: var(--primary-color);
    color: white;
}

/* ====================
   雑誌掲載セクション
==================== */
.magazine-feature {
    padding: 5rem 0;
    background: var(--bg-white);
}

.magazine-intro {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 3rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.magazine-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.magazine-item {
    background: var(--bg-light);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.magazine-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.magazine-image-wrapper {
    width: 100%;
    overflow: hidden;
}

.magazine-image {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

.magazine-caption {
    padding: 2rem;
}

.magazine-caption h3 {
    font-size: 1.5rem;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.magazine-issue {
    font-size: 0.95rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 1rem;
}

.magazine-description {
    color: var(--text-light);
    line-height: 1.8;
    font-size: 0.95rem;
}

.magazine-highlight {
    max-width: 900px;
    margin: 0 auto;
}

.highlight-box {
    background: linear-gradient(135deg, rgba(212, 175, 55, 0.1), rgba(212, 175, 55, 0.05));
    border: 2px solid var(--primary-color);
    border-radius: 20px;
    padding: 2.5rem;
}

.highlight-box h3 {
    font-size: 1.5rem;
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.highlight-box h3 i {
    color: var(--primary-color);
}

.highlight-box p {
    color: var(--text-color);
    line-height: 1.9;
}

/* ====================
   金相場セクション
==================== */
.gold-price-history {
    padding: 5rem 0;
    background: linear-gradient(135deg, #f8f8f8, #ffffff);
}

.gold-intro {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 3rem;
}

.price-comparison {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.price-card {
    background: var(--bg-white);
    border-radius: 20px;
    padding: 3rem 2.5rem;
    box-shadow: var(--shadow-md);
    min-width: 300px;
    text-align: center;
    transition: var(--transition);
}

.price-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.price-card.past {
    border: 2px solid #ccc;
}

.price-card.current {
    border: 3px solid var(--primary-color);
    background: linear-gradient(135deg, #fff9e6, #ffffff);
}

.price-label {
    font-size: 0.95rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.price-value {
    font-size: 3rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.price-value.highlight {
    color: var(--primary-color);
    font-size: 3.5rem;
}

.price-value .unit {
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--text-light);
}

.ring-price {
    font-size: 1.2rem;
    color: var(--text-color);
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.price-arrow {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.price-arrow i {
    font-size: 3rem;
    color: var(--primary-color);
}

.growth-rate {
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1.1rem;
}

.gold-message {
    max-width: 900px;
    margin: 0 auto;
}

.message-box {
    background: var(--bg-white);
    border-left: 5px solid var(--primary-color);
    border-radius: 15px;
    padding: 2.5rem;
    box-shadow: var(--shadow-sm);
}

.message-box i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.message-box h3 {
    font-size: 1.5rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.message-box p {
    color: var(--text-color);
    line-height: 1.9;
}

/* 4カラム対応 */
.features-grid.four-columns {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* ====================
   レスポンシブ（追加分）
==================== */
@media (max-width: 768px) {
    .magazine-grid {
        grid-template-columns: 1fr;
    }

    .price-comparison {
        flex-direction: column;
    }

    .price-arrow i {
        transform: rotate(90deg);
    }

    .price-value {
        font-size: 2.5rem;
    }

    .price-value.highlight {
        font-size: 3rem;
    }

    .features-grid.four-columns {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .magazine-caption {
        padding: 1.5rem;
    }

    .highlight-box {
        padding: 1.5rem;
    }

    .message-box {
        padding: 1.5rem;
    }

    .price-card {
        padding: 2rem 1.5rem;
        min-width: 250px;
    }
}