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

body {
    font-family: 'Hiragino Sans', 'Yu Gothic', sans-serif;
    line-height: 1.6;
    color: #333;
    background: #fafafa;
    opacity: 1;
}

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

/* Header */
header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: #667eea;
}

/* Mobile menu toggle */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #333;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 120px 0 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    width: 200%;
    height: 200%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="20" cy="20" r="1" fill="white" opacity="0.1"/><circle cx="80" cy="40" r="1" fill="white" opacity="0.1"/><circle cx="40" cy="60" r="1" fill="white" opacity="0.1"/><circle cx="90" cy="80" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.btn {
    padding: 15px 30px;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: white;
    color: #667eea;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.3);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: #667eea;
}

/* Pain Points Section */
.pain-section {
    padding: 80px 0;
    background: white;
}

.section-title {
    text-align: center;
    font-size: 2.4rem;
    margin-bottom: 3rem;
    color: #333;
}

.pain-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.pain-card {
    background: #f8f9ff;
    padding: 2rem;
    border-radius: 15px;
    border-left: 4px solid #ff6b6b;
    transition: transform 0.3s ease;
}

.pain-card:hover {
    transform: translateY(-5px);
}

.pain-card h3 {
    color: #ff6b6b;
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

/* About Section */
.about-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

/* About Section - Reverse Layout */
.about-section-reverse {
    padding: 80px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.about-section-reverse .section-title {
    color: white;
}

.about-section-reverse ul li {
    color: white;
}

/* About Section - Alternative Color */
.about-section-alt {
    padding: 80px 0;
    background: linear-gradient(135deg, #4ecdc4 0%, #44a08d 100%);
    color: white;
}

.about-section-alt .section-title {
    color: white;
}

.about-section-alt ul li {
    color: white;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

/* Reverse content layout */
.about-content-reverse {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-content-reverse > div:first-child {
    order: 2;
}

.about-content-reverse > div:last-child {
    order: 1;
}

/* Specific reverse layout for about-section-reverse */
.about-section-reverse .about-content-reverse > div:first-child {
    order: 1;
}

.about-section-reverse .about-content-reverse > div:last-child {
    order: 2;
}

.about-visual {
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    text-align: center;
    overflow: hidden;
}

.ai-workflow {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin: 2rem 0;
}

.workflow-item {
    text-align: center;
    flex: 1;
}

.workflow-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    color: white;
    font-size: 1.5rem;
}

.arrow {
    font-size: 2rem;
    color: #667eea;
    margin: 0 1rem;
}

/* Steps Section */
.steps-section {
    padding: 80px 0;
    background: white;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.step-card {
    text-align: center;
    padding: 2rem;
    background: #f8f9ff;
    border-radius: 15px;
    position: relative;
    transition: transform 0.3s ease;
}

.step-card:hover {
    transform: translateY(-5px);
}

.step-number {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin: 0 auto 1rem;
}

/* Cases Section */
.cases-section {
    padding: 80px 0;
    background: #f8f9ff;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.case-card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
    overflow: hidden;
}

.case-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

.case-thumbnail {
    width: 100%;
    height: 200px;
    overflow: hidden;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.case-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.case-card:hover .case-thumbnail img {
    transform: scale(1.05);
}

.case-content {
    padding: 2rem;
}

.case-card h3 a {
    color: #333;
    text-decoration: none;
}

.case-card h3 a:hover {
    color: #667eea;
}

.case-card p {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.case-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

/* Pricing Section */
.pricing-section {
    padding: 80px 0;
    background: white;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.pricing-card {
    background: #f8f9ff;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    border: 2px solid transparent;
    transition: all 0.3s ease;
}

.pricing-card:hover {
    border-color: #667eea;
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

.price {
    font-size: 2rem;
    font-weight: bold;
    color: #667eea;
    margin: 1rem 0;
}

/* FAQ Section */
.faq-section {
    padding: 80px 0;
    background: #f8f9ff;
}

.faq-item {
    background: white;
    margin-bottom: 1rem;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.faq-question {
    padding: 1.5rem;
    background: #667eea;
    color: white;
    cursor: pointer;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-answer {
    padding: 1.5rem;
    display: none;
}

.faq-answer.active {
    display: block;
}

/* Footer */
footer {
    background: #333;
    color: white;
    padding: 40px 0;
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

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

.footer-links a:hover {
    color: #667eea;
}

/* Responsive */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
    }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        gap: 0;
        box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-links li {
        border-bottom: 1px solid #eee;
    }
    
    .nav-links a {
        display: block;
        padding: 1rem 2rem;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .ai-workflow {
        flex-direction: column;
        gap: 1rem;
    }
    
    .arrow {
        transform: rotate(90deg);
        margin: 1rem 0;
    }
    
    .pain-grid,
    .steps-grid,
    .cases-grid,
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
}

/* Additional mobile styles */
@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 1rem;
    }
    
    .case-card,
    .pain-card,
    .step-card,
    .pricing-card {
        padding: 1.5rem;
    }
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Enhanced button animations */
.btn {
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

/* Enhanced form styling */
form input,
form textarea {
    transition: all 0.3s ease;
}

form input:focus,
form textarea:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.3);
    transform: translateY(-2px);
}

/* Scroll indicator */
.scroll-indicator {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transform-origin: left;
    transform: scaleX(0);
    transition: transform 0.3s ease;
    z-index: 1001;
}

/* Articles page specific styles */
.articles-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 120px 0 80px;
    text-align: center;
}

.search-box {
    display: flex;
    gap: 10px;
    margin-bottom: 2rem;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.search-input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid #ddd;
    border-radius: 25px;
    font-size: 1rem;
}

.search-button {
    padding: 12px 20px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-size: 1rem;
}

.articles-info {
    text-align: center;
    margin-bottom: 2rem;
    color: #666;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.article-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.article-card:hover {
    transform: translateY(-5px);
}

.article-image {
    height: 200px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
}

.article-content {
    padding: 1.5rem;
}

.article-title {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #333;
}

.article-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    color: #666;
}

.article-description {
    color: #666;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.article-link {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

.article-link:hover {
    text-decoration: underline;
}

.pagination {
    margin-top: 3rem;
    text-align: center;
}

.pagination-info {
    margin-bottom: 1rem;
    color: #666;
}

.pagination-controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.pagination-link {
    padding: 8px 16px;
    background: white;
    color: #667eea;
    text-decoration: none;
    border: 1px solid #ddd;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.pagination-link:hover {
    background: #667eea;
    color: white;
}

.pagination-current {
    padding: 8px 16px;
    background: #667eea;
    color: white;
    border-radius: 5px;
}

.no-articles {
    text-align: center;
    padding: 3rem;
    color: #666;
}

/* Breadcrumb */
.breadcrumb {
    padding: 1rem 0;
    background: #f8f9fa;
    margin-top: 80px; /* ヘッダーの高さ分のマージンを追加 */
}

.breadcrumb a {
    color: #667eea;
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}