body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #fff;
        }

        /* ヘッダー */
        header {
            background-color: #fff;
            border-bottom: 1px solid #e0e0e0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 8px rgba(0,0,0,0.05);
        }

        .header-content {
            max-width: 1000px;
            margin: 0 auto;
            padding: 1rem 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 1.1rem;
            font-weight: 600;
            color: #333;
        }

        .cta-header {
            background-color: #2563eb;
            color: white;
            padding: 0.6rem 1.5rem;
            border-radius: 6px;
            text-decoration: none;
            font-size: 0.9rem;
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .cta-header:hover {
            background-color: #1d4ed8;
            transform: translateY(-1px);
        }

        /* ヒーローセクション */
        .hero {
            background: linear-gradient(135deg, #0085CA 0%, #005a98 100%);
            color: white;
            padding: 3rem 1.5rem;
            text-align: center;
        }

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

        .hero h1 {
            font-size: 1.8rem;
            margin-bottom: 1rem;
            line-height: 1.4;
            font-weight: 700;
        }

        .hero p {
            font-size: 1rem;
            margin-bottom: 2rem;
            opacity: 0.95;
            line-height: 1.8;
        }

        .cta-button {
            display: inline-block;
            background-color: white;
            color: #005a98;
            padding: 1rem 2.5rem;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 50px;
            text-decoration: none;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(0,0,0,0.2);
        }

        .cta-button:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0,0,0,0.3);
        }

        /* セクション共通 */
        section {
            padding: 3rem 1.5rem;
            max-width: 1000px;
            margin: 0 auto;
        }

        .section-title {
            text-align: center;
            font-size: 1.8rem;
            margin-bottom: 2.5rem;
            color: #333;
            font-weight: 700;
        }

        .section-subtitle {
            text-align: center;
            color: #666;
            margin-bottom: 2rem;
            line-height: 1.8;
        }

        /* カテゴリセクション */
        .category-section {
            margin-bottom: 4rem;
        }

        .category-header {
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            padding: 2rem 1.5rem;
            border-radius: 12px;
            margin-bottom: 1.5rem;
        }

        .category-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: #333;
            margin-bottom: 0.5rem;
        }

        .category-description {
            color: #666;
            line-height: 1.7;
        }

        /* 商品グリッド */
        .product-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
        }

        .product-card {
            background: white;
            border: 1px solid #e0e0e0;
            border-radius: 12px;
            overflow: hidden;
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .product-card:hover {
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
            transform: translateY(-3px);
        }

        .product-image {
            width: 100%;
            aspect-ratio: 1;
            background:#fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
            color: #666;
            flex-shrink: 0;
        }

        .product-image img{
            width: 90%;
            height: 90%;
            object-fit: cover;
            display: block;
            padding: 16px;
           
        }

        .product-info {
            padding: 1.25rem;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }

        .product-brand {
            font-size: 0.85rem;
            color: #999;
            margin-bottom: 0.3rem;
            font-weight: 600;
        }

        .product-name {
            font-size: 1.1rem;
            margin-bottom: 0.8rem;
            color: #333;
            font-weight: 600;
            min-height: 2.6rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.3;
        }

        .product-price {
            font-size: 1.3rem;
            font-weight: 700;
            color: #2563eb;
            margin-bottom: 0.5rem;
        }

        .product-points {
            font-size: 0.85rem;
            color: #f59e0b;
            margin-bottom: 1rem;
            font-weight: 600;
        }

        .product-link {
            display: inline-block;
            background-color: #005a98;
            color: white;
            padding: 0.6rem 1.2rem;
            border-radius: 6px;
            text-decoration: none;
            font-size: 0.85rem;
            font-weight: 600;
            transition: all 0.3s ease;
            margin-top: auto;
            margin: 4px;
            text-align: center;
        }

        .product-link:hover {
            background-color: #0085CA;
            transform: translateY(-1px);
        }

        .category-more {
            text-align: center;
            margin-top: 1.5rem;
        }

        .more-link {
            display: inline-block;
            background-color: #005a98;
            color: white;
            padding: 0.8rem 2rem;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .more-link:hover {
            background-color: #0085CA;
            transform: translateY(-2px);
        }

        /* 雨の日登山セクション */
        .mountain-section {
            background: linear-gradient(135deg, rgba(224, 242, 241, 0.6) 0%, rgba(178, 223, 219, 0.6) 50%, rgba(128, 203, 196, 0.6) 100%);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            padding: 3rem 1.5rem 8rem 1.5rem;
            border-radius: 0;
            margin: 0 auto;
            position: relative;
        }

        .mountain-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100"><circle cx="10" cy="10" r="1" fill="white" opacity="0.3"/><circle cx="40" cy="30" r="1.5" fill="white" opacity="0.2"/><circle cx="70" cy="20" r="1" fill="white" opacity="0.3"/><circle cx="30" cy="60" r="1" fill="white" opacity="0.25"/><circle cx="80" cy="70" r="1.5" fill="white" opacity="0.2"/></svg>') repeat;
            pointer-events: none;
            opacity: 0.5;
        }

        .mountain-container {
            max-width: 1000px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
        }

        .mountain-title {
            font-size: 1.8rem;
            font-weight: 700;
            color: #333;
            margin-bottom: 1rem;
            text-align: center;
        }

        .mountain-description {
            text-align: center;
            color: #555;
            margin-bottom: 2rem;
            line-height: 1.8;
        }

.items-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem 2rem;  /* ← ここを変更（縦 横） */
    margin-top: 4rem;

    align-items: stretch;}

.item-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 1.5rem;
    border-radius: 12px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.5);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    /* height: 100%; を削除 */
    /* display: flex; を削除 */
    /* flex-direction: column; を削除 */
}

        .item-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
        }

        .item-card h3 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: #333;
        }

 .item-card p {
    font-size: 0.85rem;
    color: #666;
    margin-bottom: 1rem;
    line-height: 1.6;
    min-height: 3.5rem;  /* ← この行を追加して説明文の最小高さを確保 */
    /* flex: 1; を削除 */
}

        .item-link {
            display: inline-block;
            background-color: #26c6da;
            color: white;
            padding: 0.5rem 1rem;
            border-radius: 6px;
            text-decoration: none;
            font-size: 0.85rem;
            font-weight: 600;
            transition: all 0.3s ease;
            margin-top: 0.5rem;
        }

        .item-link:hover {
            background-color: #00acc1;
            transform: translateY(-1px);
        }

        /* 画像エリア */
        .section-image {
            margin: 2rem 0;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
        }

        .image-placeholder {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            background: linear-gradient(135deg, #0085CA 0%, #005a98 100%);
            display: flex;
            justify-content: center;
            color: white;
            font-size: 1rem;
            font-weight: 600;
            position: relative;
            overflow: hidden;
        }

        .image-placeholder::before {
            font-size: 3rem;
            position: absolute;
            opacity: 0.3;
        }

        .category-image {
            width: 100%;
            aspect-ratio: 16/9;
            background: linear-gradient(135deg, #f5f7fa 0%, #e0e7ff 100%);
            display: flex;
            justify-content: center;
            color: #999;
            font-size: 0.9rem;
            font-weight: 600;
            border-radius: 12px;
            margin-bottom: 1.5rem;
            border: 2px dashed #d0d0d0;
            position: relative;
            overflow: hidden;
        }

        .category-image::before {
            font-size: 2.5rem;
            position: absolute;
            opacity: 0.2;
        }

        /* 情報セクション */
        .info-section {
            background-color: #f9fafb;
            padding: 3rem 1.5rem;
            margin: 3rem 0;
            margin-left: auto;
            margin-right: auto;
            border-radius: 12px;
        }

        .info-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: #333;
            margin-bottom: 1.5rem;
            padding: 1.5rem 1rem;
            background: linear-gradient(135deg, #0085CA 0%, #005a98 100%);
            color: white;
            border-radius: 12px;
            position: relative;
            line-height: 1.5;
        }

        .info-title::before {
            content: '?';
            display: inline-block;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.3);
            border-radius: 50%;
            text-align: center;
            line-height: 40px;
            font-size: 1.5rem;
            margin-right: 0.8rem;
            vertical-align: middle;
        }

        .info-content {
            background: white;
            padding: 1.5rem;
            border-radius: 10px;
            margin-bottom: 1.5rem;
        }

        .info-content h3 {
            font-size: 1.3rem;
            font-weight: 800;
            color: #0085CA;
            margin-bottom: 0.5rem;
        }

        .info-content p {
            color: #666;
            line-height: 1.8;
        }

        /* ステップセクション */
        .steps-section {
            background-color: #fff;
            padding: 3rem 1.5rem;
        }

        .steps-title {
            font-size: 0.8rem;
            font-weight: 700;
            color: white;
            margin-bottom: 1.5rem;
            text-align: left;
            padding: 1.5rem 1rem;
            background: linear-gradient(135deg, #0085CA 0%, #005a98 100%);
            border-radius: 12px;
            position: relative;
            line-height: 1.5;
        }

        .steps-title::before {
            content: '!';
            display: inline-block;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.3);
            border-radius: 50%;
            text-align: center;
            line-height: 40px;
            font-size: 1.5rem;
            margin-right: 0.8rem;
            vertical-align: middle;
        }

        .step-item {
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            padding: 1.5rem;
            border-radius: 10px;
            margin-bottom: 1rem;
        }

        .step-number {
            display: inline-block;
            background-color: #005a98;
            color: white;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            text-align: center;
            line-height: 30px;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .step-item h3 {
            font-size: 1.1rem;
            font-weight: 800;
            color: #333;
            margin-bottom: 0.5rem;
        }

        .step-item p {
            color: #555;
            line-height: 1.7;
        }

        /* 最終CTA */
        .final-cta {
            background: linear-gradient(135deg, #0085CA 0%, #005a98 100%);
            color: white;
            text-align: center;
            padding: 3rem 1.5rem;
            border-radius: 0;
            margin: 0 auto;
        }

        .final-cta-container {
            max-width: 1000px;
            margin: 0 auto;
        }

        .final-cta h2 {
            font-size: 1.8rem;
            margin-bottom: 1rem;
            font-weight: 700;
        }

        .final-cta p {
            margin-bottom: 2rem;
            opacity: 0.95;
            line-height: 1.8;
        }

        /* フッター */
        footer {
            background-color: #f9fafb;
            padding: 2rem 1.5rem;
            text-align: center;
            border-top: 1px solid #e0e0e0;
        }

        .footer-links {
            margin-bottom: 1rem;
        }

        .footer-links a {
            color: #666;
            text-decoration: none;
            margin: 0 0.8rem;
            font-size: 0.85rem;
        }

        .footer-links a:hover {
            color: #005a98;
        }

        footer p {
            color: #999;
            font-size: 0.8rem;
        }

        /* タブレット以上 */
        @media (min-width: 768px) {
            .hero h1 {
                font-size: 2.5rem;
            }

            .hero p {
                font-size: 1.1rem;
            }

            section {
                padding: 4rem 2rem;
            }

            .product-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 2rem;
            }

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

            .info-title, .steps-title {
                font-size: 2rem;
                padding: 2rem 1.5rem;
            }

            .info-title::before, .steps-title::before {
                width: 50px;
                height: 50px;
                line-height: 50px;
                font-size: 2rem;
                margin-right: 1rem;
            }
        }

        /* デスクトップ */
        @media (min-width: 1024px) {
            .header-content {
                padding: 1.5rem 2rem;
            }

            .hero {
                padding: 5rem 2rem;
            }

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

        /* 3. タブレット以上のitems-grid - gapを調整 */
@media (min-width: 768px) {
    .items-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 2rem 1.5rem;  /* ← ここを変更（縦 横） */
    }
}