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

body {
    font-family: 'Noto Serif JP', serif;
    line-height: 1.6;
    color: #2c1810;
    background: linear-gradient(135deg, #f0f4f8 0%, #e8f0fe 100%);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ヒーローセクション */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(44, 62, 80, 0.7) 0%, rgba(52, 73, 94, 0.7) 50%, rgba(26, 188, 156, 0.7) 100%), url('christmas2.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
}

/* 雪のアニメーション */
.snow-container {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.snowflake {
    position: absolute;
    top: -10px;
    color: rgba(255, 255, 255, 0.8);
    user-select: none;
    animation: snowfall linear infinite;
    font-size: 14px;
}

@keyframes snowfall {
    0% {
        top: -10px;
        transform: translateX(0) rotate(0deg);
    }
    100% {
        top: 100vh;
        transform: translateX(100px) rotate(360deg);
    }
}

.hero-content {
    position: relative;
    z-index: 2;
    display: flex;
    justify-content: center;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

.hero-title {
    font-family: 'Playfair Display', serif;
    font-size: 4.5rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 20px;
    line-height: 1.1;
}

.title-main {
    display: block;
    background: linear-gradient(45deg, #e74c3c, #f39c12);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.title-sub {
    display: block;
    font-size: 3rem;
    color: #3498db;
    margin-top: 10px;
}

.hero-description {
    font-size: 1.3rem;
    color: #ecf0f1;
    margin-bottom: 30px;
    line-height: 1.8;
}

.hero-dates {
    display: inline-block;
    background: rgba(52, 152, 219, 0.2);
    border: 2px solid #3498db;
    padding: 12px 24px;
    border-radius: 30px;
    margin-bottom: 40px;
}

.date {
    color: #ffffff;
    font-weight: 600;
    font-size: 1.1rem;
}

.cta-button {
    background: linear-gradient(45deg, #e74c3c, #f39c12);
    color: #ffffff;
    border: none;
    padding: 18px 40px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 10px 30px rgba(231, 76, 60, 0.3);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(231, 76, 60, 0.4);
}

.cta-button i {
    transition: transform 0.3s ease;
}

.cta-button:hover i {
    transform: translateX(5px);
}

/* セクションヘッダー */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-family: 'Playfair Display', serif;
    font-size: 3rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 15px;
}

.section-subtitle {
    font-size: 1.2rem;
    color: #666;
    font-weight: 400;
}

/* オファーセクション */
.offers {
    padding: 100px 0;
    background: linear-gradient(135deg, #f0f4f8 0%, #e8f0fe 100%);
}

.offers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
}

.offer-card {
    background: #ffffff;
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    position: relative;
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.offer-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.offer-badge {
    position: absolute;
    top: -15px;
    right: 20px;
    background: linear-gradient(45deg, #e74c3c, #f39c12);
    color: #ffffff;
    padding: 8px 20px;
    border-radius: 25px;
    font-weight: 600;
    font-size: 0.9rem;
}

.offer-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    background: linear-gradient(45deg, #e74c3c, #f39c12);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.offer-icon-img {
    width: 120px;
    height: 120px;
    object-fit: cover;
    border-radius: 50%;
    margin-bottom: 20px;
}

.offer-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 20px;
}

.offer-price {
    margin-bottom: 30px;
}

.original-price {
    text-decoration: line-through;
    color: #999;
    font-size: 1.1rem;
    margin-right: 10px;
}

.special-price {
    font-size: 2.5rem;
    font-weight: 700;
    color: #e74c3c;
}

.offer-features {
    list-style: none;
    margin-bottom: 30px;
    text-align: left;
}

.offer-features li {
    padding: 10px 0;
    border-bottom: 1px solid #eee;
    display: flex;
    align-items: center;
    gap: 10px;
}

.offer-features li:last-child {
    border-bottom: none;
}

.offer-features i {
    color: #e74c3c;
    font-size: 1.1rem;
}

.offer-limited {
    margin-bottom: 30px;
}

.limited-badge {
    background: linear-gradient(45deg, #3498db, #2c3e50);
    color: #ffffff;
    padding: 15px;
    border-radius: 15px;
    margin-bottom: 15px;
    text-align: center;
    transition: all 0.3s ease;
}

.limited-badge:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.3);
}

.limited-badge:last-child {
    margin-bottom: 0;
}

.limited-number {
    display: block;
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: #f39c12;
}

.limited-period {
    display: block;
    font-size: 0.9rem;
    margin-bottom: 5px;
    opacity: 0.9;
}

.limited-discount {
    display: inline-block;
    background: rgba(243, 156, 18, 0.2);
    color: #f39c12;
    padding: 5px 12px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
    border: 1px solid #f39c12;
    margin-bottom: 5px;
}

.limited-max {
    display: block;
    font-weight: 700;
    font-size: 1rem;
    color: #ffffff;
    margin-top: 5px;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.limited-price {
    display: block;
    font-weight: 700;
    font-size: 0.9rem;
    color: #ffffff;
    margin-top: 5px;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.offer-details {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 20px;
    margin-top: 15px;
}

.detail-section {
    margin-bottom: 15px;
    text-align: left;
}

.detail-section:last-child {
    margin-bottom: 0;
}

.detail-section h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 5px;
    border-bottom: 1px solid rgba(44, 62, 80, 0.2);
    padding-bottom: 3px;
}

.detail-section p {
    font-size: 0.85rem;
    color: #666;
    line-height: 1.4;
}

.original-price-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(231, 76, 60, 0.1);
    padding: 10px 15px;
    border-radius: 8px;
    margin-top: 15px;
    border: 1px solid rgba(231, 76, 60, 0.2);
}

.price-label {
    font-size: 0.85rem;
    color: #666;
    font-weight: 500;
}

.price-value {
    font-size: 0.9rem;
    color: #e74c3c;
    font-weight: 600;
}

.offer-button {
    background: linear-gradient(45deg, #2c3e50, #34495e);
    color: #ffffff;
    border: none;
    padding: 15px 30px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
}

.offer-button:hover {
    background: linear-gradient(45deg, #34495e, #1abc9c);
    transform: translateY(-2px);
}

.offer-card.premium {
    border: none;
    transform: scale(1.05);
}

.offer-note {
    text-align: center;
    color: #666;
    font-size: 0.9rem;
    font-style: italic;
    margin-top: 15px;
    padding: 10px;
    background: rgba(52, 152, 219, 0.1);
    border-radius: 8px;
    border: 1px solid rgba(52, 152, 219, 0.2);
}

/* 特徴セクション */
.features {
    padding: 100px 0;
    background: #ffffff;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 50px;
}

.feature-item {
    text-align: center;
    padding: 40px 20px;
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 25px;
    background: linear-gradient(45deg, #3498db, #e74c3c);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 15px;
}

.feature-description {
    font-size: 1.1rem;
    color: #666;
    line-height: 1.8;
}

/* CTAセクション */
.cta {
    padding: 100px 0;
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    text-align: center;
}

.cta-title {
    font-family: 'Playfair Display', serif;
    font-size: 3rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 20px;
}

.cta-description {
    font-size: 1.3rem;
    color: #f5e6d3;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 30px;
}

.cta-primary {
    background: linear-gradient(45deg, #e74c3c, #f39c12);
    color: #ffffff;
    border: none;
    padding: 18px 40px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.cta-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(231, 76, 60, 0.4);
}

.cta-secondary {
    background: transparent;
    color: #ffffff;
    border: 2px solid #ffffff;
    padding: 16px 38px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.cta-secondary:hover {
    background: #ffffff;
    color: #2c3e50;
}

.cta-deadline {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: rgba(52, 152, 219, 0.2);
    border: 2px solid #3498db;
    padding: 12px 24px;
    border-radius: 30px;
    color: #ffffff;
}

.cta-deadline i {
    color: #3498db;
}

/* フッター */
.footer {
    background: #2c3e50;
    color: #ffffff;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo h3 {
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: #e74c3c;
}

.footer-logo p {
    color: #999;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.footer-links a {
    color: #ffffff;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #e74c3c;
}

.footer-social {
    display: flex;
    gap: 20px;
    justify-content: flex-end;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(231, 76, 60, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #e74c3c;
    transition: all 0.3s ease;
}

.footer-social a:hover {
    background: #e74c3c;
    color: #ffffff;
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #999;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    .hero {
        min-height: 70vh;
        padding: 40px 0;
        background-position: center;
        background-attachment: scroll;
    }
    
    .hero-content {
        padding: 0 20px;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .title-sub {
        font-size: 1.6rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 2.5rem;
    }
    
    .offers-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-social {
        justify-content: center;
    }
    
    .cta-title {
        font-size: 2.5rem;
    }
    
    .offer-card.premium {
        transform: scale(1);
    }
}

@media (max-width: 480px) {
    .hero {
        min-height: 60vh;
        padding: 30px 0;
        background-position: center;
        background-attachment: scroll; /* モバイルではscrollに変更 */
        background-size: cover; /* モバイルでもcoverを明示的に指定 */
    }
    
    .hero-content {
        padding: 0 15px;
    }
    
    .hero-title {
        font-size: 2.2rem;
        margin-bottom: 15px;
    }
    
    .title-sub {
        font-size: 1.4rem;
        margin-top: 8px;
    }
    
    .hero-description {
        font-size: 0.95rem;
        margin-bottom: 20px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .cta-title {
        font-size: 2rem;
    }
    
    .offer-card {
        padding: 30px 20px;
    }
    
    .special-price {
        font-size: 2rem;
    }
}