/* CSS Variables */
:root {
    --primary-color: #4A90B2;
    --secondary-color: #E8F4F8;
    --accent-color: #FF7A7A;
    --text-primary: #333333;
    --text-secondary: #666666;
    --background: #FAFBFC;
    --white: #FFFFFF;
    --light-gray: #F5F7FA;
    --border-color: #E1E8ED;
    --shadow: 0 4px 12px rgba(74, 144, 178, 0.1);
    --shadow-hover: 0 8px 24px rgba(74, 144, 178, 0.15);
    --border-radius: 12px;
    --max-width: 1200px;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background);
    background-image: 
        radial-gradient(circle at 20px 20px, rgba(74, 144, 178, 0.03) 1px, transparent 0),
        radial-gradient(circle at 40px 40px, rgba(255, 122, 122, 0.02) 1px, transparent 0);
    background-size: 80px 80px, 120px 120px;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: var(--white);
    border-bottom: 1px solid var(--border-color);
    padding: 20px 0;
}

.header-content {
    display: flex;
    align-items: center;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo {
    flex-shrink: 0;
}

.brand-name {
    font-family: 'Noto Serif JP', serif;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--white) 100%);
    padding: 80px 0;
    text-align: center;
}

.hero-title {
    font-family: 'Noto Serif JP', serif;
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-image-placeholder {
    max-width: 800px;
    height: 400px;
    margin: 0 auto;
    background: var(--light-gray);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px dashed var(--border-color);
}

.placeholder-text {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Section Styles */
section {
    padding: 80px 0;
}

.centered-section {
    text-align: center;
}

.centered-section .container > * {
    text-align: center;
}

.centered-section .benefit-item {
    text-align: left;
}

.section-title {
    font-family: 'Noto Serif JP', serif;
    font-size: 2rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 60px;
    color: var(--text-primary);
}

/* Features Overview */
.features-overview {
    background: var(--white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.feature-card {
    text-align: center;
    padding: 30px 20px;
    border-radius: var(--border-radius);
    background: var(--light-gray);
    transition: all 0.3s ease;
}

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

.feature-icon {
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Products Section */
.products {
    background: var(--secondary-color);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.product-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 40px 30px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    position: relative;
}

.product-card.featured {
    border: 2px solid var(--accent-color);
    transform: scale(1.05);
}

.product-card.featured::before {
    content: '人気';
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-color);
    color: white;
    padding: 5px 20px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

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

.product-card.featured:hover {
    transform: scale(1.05) translateY(-5px);
}

.product-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 30px;
}

.price span {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-secondary);
}

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

.features-list li {
    padding: 8px 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 20px;
}

.features-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.cta-button {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
    font-family: 'Noto Sans JP', sans-serif;
}

.cta-button:hover {
    background: #3A7A9A;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(74, 144, 178, 0.3);
}

/* Benefits Section */
.benefits {
    background: var(--white);
}

.benefits-content {
    display: flex;
    flex-direction: column;
    gap: 60px;
}

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

.benefit-item:nth-child(even) {
    direction: rtl;
}

.benefit-item:nth-child(even) .benefit-text {
    direction: ltr;
}

.benefit-image-placeholder {
    height: 300px;
    background: var(--light-gray);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px dashed var(--border-color);
}

.benefit-text h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.benefit-text p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* How It Works */
.how-it-works {
    background: var(--secondary-color);
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.step {
    text-align: center;
    background: var(--white);
    padding: 40px 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 20px;
}

.step h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.step p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Testimonials */
.testimonials {
    background: var(--white);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
}

.testimonial {
    background: var(--light-gray);
    padding: 30px;
    border-radius: var(--border-radius);
    text-align: center;
}

.testimonial-image-placeholder {
    width: 80px;
    height: 80px;
    background: var(--border-color);
    border-radius: 50%;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.testimonial p {
    font-style: italic;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.6;
}

.testimonial cite {
    color: var(--primary-color);
    font-weight: 600;
    font-style: normal;
}

/* Integration Section */
.integration {
    background: var(--secondary-color);
}

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

.integration-image-placeholder {
    height: 400px;
    background: var(--light-gray);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px dashed var(--border-color);
}

.integration-text h3 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.integration-text p {
    color: var(--text-secondary);
    margin-bottom: 30px;
    line-height: 1.7;
}

.integration-text ul {
    list-style: none;
}

.integration-text ul li {
    padding: 8px 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 20px;
}

.integration-text ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* Contact Section */
.contact {
    background: var(--white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-item h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.contact-item p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.contact-item a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.contact-item a:hover {
    text-decoration: underline;
}

.contact-form-placeholder {
    height: 400px;
    background: var(--light-gray);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px dashed var(--border-color);
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: var(--white);
    padding: 50px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 30px;
    margin-bottom: 30px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: 'Noto Serif JP', serif;
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.footer-brand-section {
    display: flex;
    flex-direction: column;
}

.footer-brand-description {
    color: #CCCCCC;
    font-size: 0.9rem;
    line-height: 1.5;
    margin-top: 10px;
}

.footer-section h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--white);
}

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

.footer-section ul li {
    margin-bottom: 8px;
}

.footer-section ul li a {
    color: #CCCCCC;
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 0.9rem;
}

.footer-section ul li a:hover {
    color: var(--white);
}

.footer-bottom {
    border-top: 1px solid #444444;
    padding-top: 20px;
    text-align: center;
    color: #CCCCCC;
    font-size: 0.85rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 25px;
    }

    .footer-brand-section {
        text-align: center;
    }

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

    .section-title {
        font-size: 1.6rem;
    }

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

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

    .product-card.featured {
        transform: none;
    }

    .benefit-item {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .benefit-item:nth-child(even) {
        direction: ltr;
    }

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

    .integration-content {
        grid-template-columns: 1fr;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 480px) {
    .hero {
        padding: 40px 0;
    }

    section {
        padding: 40px 0;
    }

    .hero-title {
        font-size: 1.6rem;
    }

    .brand-name {
        font-size: 1.2rem;
    }

    .product-card {
        padding: 30px 20px;
    }

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