:root {
    --gold: #C9A65A;
    --gold-light: #E5D3A8;
    --gold-dark: #B08D43;
    --navy: #1A1A2E;
    --white: #FFFFFF;
    --gray-light: #F5F5F5;
    --gray: #E0E0E0;
    --text-dark: #333333;
    --text-light: #666666;
}

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

body {
    font-family: 'Noto Serif JP', serif;
    color: var(--text-dark);
    line-height: 1.8;
    background-color: var(--white);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Noto Serif JP', serif;
    font-weight: 600;
    line-height: 1.4;
}

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

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--navy) 0%, #2A2A3E 100%);
    color: var(--white);
    text-align: center;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('../images/hero-lineup.jpg');
    background-size: cover;
    background-position: center;
    opacity: 0.3;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: 60px 20px;
}

.hero h1 {
    font-size: 4.2rem;
    margin-bottom: 20px;
    color: var(--gold-light);
    letter-spacing: 0.1em;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--gold);
    font-weight: 500;
    letter-spacing: 0.05em;
}

.hero-description {
    font-size: 1.1rem;
    line-height: 1.9;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
}

.badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--gold) 0%, var(--gold-dark) 100%);
    color: var(--white);
    padding: 8px 24px;
    border-radius: 30px;
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    margin-top: 20px;
}

.hero-brand-name {
    font-family: 'Noto Serif JP', serif;
    font-size: 2.5rem;
    font-weight: 400;
    color: var(--gold);
    letter-spacing: 0.05em;
    margin-top: 40px;
    display: block;
}

.hero-tagline {
    font-family: 'Noto Serif JP', serif;
    font-size: 1.1rem;
    font-weight: 400;
    color: var(--gold);
    margin-top: 10px;
    letter-spacing: 0.05em;
    font-style: italic;
}

/* Section Base Styles */
section {
    padding: 100px 0;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 60px;
    color: var(--navy);
    position: relative;
    padding-bottom: 20px;
}

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

.section-title-gradient {
    background: linear-gradient(135deg, #B8860B 0%, #D4AF37 50%, #B8860B 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 50px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* About Section */
.about {
    background-color: var(--gray-light);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-image {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.about-text h3 {
    font-size: 1.8rem;
    color: var(--navy);
    margin-bottom: 25px;
}

.about-text ul {
    list-style: none;
    margin: 30px 0;
}

.about-text li {
    padding: 15px 0;
    padding-left: 35px;
    position: relative;
    font-size: 1.05rem;
    color: var(--text-dark);
}

.about-text li:nth-child(1)::before {
    content: '💎';
    position: absolute;
    left: 0;
    font-size: 1.3rem;
    top: 15px;
}

.about-text li:nth-child(2)::before {
    content: '💧';
    position: absolute;
    left: 0;
    font-size: 1.3rem;
    top: 15px;
}

.about-text strong {
    color: var(--gold-dark);
    font-weight: 600;
}

/* Product Set Section */
.product-set {
    background-color: var(--white);
}

.product-set-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.product-set-image {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}

.product-set-details h3 {
    font-size: 1.8rem;
    color: var(--navy);
    margin-bottom: 25px;
}

.product-set-details p {
    font-size: 1.05rem;
    color: var(--text-light);
    margin-bottom: 30px;
    line-height: 1.9;
}

.set-items {
    background: var(--gray-light);
    padding: 30px;
    border-radius: 10px;
    border-left: 4px solid var(--gold);
}

.set-item {
    margin-bottom: 20px;
}

.set-item:last-child {
    margin-bottom: 0;
}

.set-item h4 {
    font-size: 1.2rem;
    color: var(--gold-dark);
    margin-bottom: 8px;
}

.set-item p {
    font-size: 0.95rem;
    color: var(--text-dark);
    margin: 0;
}

/* Benefits Section */
.benefits {
    background: linear-gradient(135deg, var(--navy) 0%, #2A2A3E 100%);
    color: var(--white);
}

.benefits .section-title {
    color: var(--gold-light);
}

.benefits .section-title::after {
    background: linear-gradient(90deg, transparent, var(--gold-light), transparent);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 60px;
}

.benefit-card {
    background: rgba(255, 255, 255, 0.05);
    padding: 40px 30px;
    border-radius: 10px;
    text-align: center;
    border: 1px solid rgba(201, 166, 90, 0.2);
}

.benefit-card h3 {
    font-size: 1.5rem;
    color: var(--gold);
    margin-bottom: 20px;
}

.benefit-card p {
    font-size: 1rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.85);
}

.highlight-box {
    background: linear-gradient(135deg, var(--gold-dark), var(--gold));
    padding: 50px 40px;
    border-radius: 15px;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.highlight-box h3 {
    font-size: 2rem;
    color: var(--white);
    margin-bottom: 15px;
}

.highlight-box p {
    font-size: 1.1rem;
    color: var(--white);
    line-height: 1.8;
}

/* Color Variation Section */
.color-variation {
    background-color: var(--gray-light);
}

.color-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    max-width: 1000px;
    margin: 0 auto;
}

.color-card {
    background: var(--white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}

.color-card-image {
    width: 100%;
    height: 400px;
    object-fit: contain;
    background-color: var(--gray-light);
}

.color-card-content {
    padding: 30px;
    text-align: center;
}

.color-card-content h3 {
    font-size: 1.6rem;
    color: var(--navy);
    margin-bottom: 15px;
}

.color-card-content p {
    font-size: 1rem;
    color: var(--text-light);
    line-height: 1.8;
}

/* Gallery Section */
.gallery {
    background-color: var(--white);
}

.gallery-image {
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
    display: block;
    border-radius: 15px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    height: auto;
    object-fit: contain;
}

.gallery-description {
    text-align: center;
    max-width: 700px;
    margin: 40px auto 0;
    font-size: 1.1rem;
    color: var(--text-light);
    line-height: 1.9;
}

/* Design Section */
.design {
    background: var(--gray-light);
}

.design-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.design-image {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    height: auto;
    object-fit: contain;
}

.design-text h3 {
    font-size: 1.8rem;
    color: var(--navy);
    margin-bottom: 25px;
}

.design-text p {
    font-size: 1.05rem;
    color: var(--text-light);
    line-height: 1.9;
    margin-bottom: 25px;
}

.design-features {
    list-style: none;
    margin-top: 30px;
}

.design-features li {
    padding: 12px 0;
    padding-left: 30px;
    position: relative;
    font-size: 1.05rem;
    color: var(--text-dark);
}

.design-features li::before {
    content: '◆';
    position: absolute;
    left: 0;
    color: var(--gold);
    font-size: 0.8rem;
}

/* Usage Section */
.usage {
    background-color: var(--white);
}

.usage-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 60px;
}

.usage-step {
    text-align: center;
    padding: 40px 20px;
    background: var(--gray-light);
    border-radius: 10px;
    position: relative;
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--gold), var(--gold-dark));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    font-weight: bold;
    margin: 0 auto 25px;
    font-family: 'Noto Serif JP', serif;
}

.usage-step h3 {
    font-size: 1.4rem;
    color: var(--navy);
    margin-bottom: 15px;
}

.usage-step p {
    font-size: 1rem;
    color: var(--text-light);
    line-height: 1.8;
}

.usage-scenarios {
    background: var(--gray-light);
    padding: 50px 40px;
    border-radius: 15px;
    max-width: 900px;
    margin: 0 auto;
}

.usage-scenarios h3 {
    font-size: 1.8rem;
    color: var(--navy);
    margin-bottom: 30px;
    text-align: center;
}

.scenario-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.scenario-item {
    background: var(--white);
    padding: 20px;
    border-radius: 8px;
    border-left: 3px solid var(--gold);
}

.scenario-item strong {
    color: var(--gold-dark);
    font-weight: 600;
}

/* Quality Section */
.quality {
    background: linear-gradient(135deg, var(--navy) 0%, #2A2A3E 100%);
    color: var(--white);
}

.quality .section-title {
    color: var(--gold-light);
}

.quality .section-title::after {
    background: linear-gradient(90deg, transparent, var(--gold-light), transparent);
}

.quality-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.quality-card {
    background: rgba(255, 255, 255, 0.05);
    padding: 40px 30px;
    border-radius: 10px;
    border: 1px solid rgba(201, 166, 90, 0.2);
}

.quality-card h4 {
    font-size: 1.4rem;
    color: var(--gold);
    margin-bottom: 20px;
}

.quality-card p {
    font-size: 1rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.85);
}

/* FAQ Section */
.faq {
    background-color: var(--gray-light);
}

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

.faq-item {
    background: var(--white);
    padding: 35px 40px;
    margin-bottom: 20px;
    border-radius: 10px;
    border-left: 4px solid var(--gold);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.faq-item h3 {
    font-size: 1.3rem;
    color: var(--navy);
    margin-bottom: 15px;
}

.faq-item p {
    font-size: 1rem;
    color: var(--text-light);
    line-height: 1.9;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.4rem;
    }

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

    .hero-description {
        font-size: 0.95rem;
    }

    .hero-brand-name {
        font-size: 1.6rem;
        margin-top: 30px;
    }

    .hero-tagline {
        font-size: 0.95rem;
        margin-top: 8px;
    }

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

    .about-content,
    .product-set-grid,
    .color-grid,
    .design-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .benefits-grid,
    .usage-steps,
    .quality-grid {
        grid-template-columns: 1fr;
    }

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

    section {
        padding: 60px 0;
    }

    .color-card-image {
        height: 300px;
    }
}