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

body {
    font-family: 'Noto Sans JP', sans-serif;
    line-height: 1.7;
    color: #333;
    background-color: #fafbfc;
}

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

/* Typography */
h1, h2, h3, h4 {
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 1rem;
}

h1 {
    font-size: 2.5rem;
    color: #1e3a8a;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

p {
    color: #4a5568;
}

/* Header */
.header {
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    color: white;
    padding: 1.5rem 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header-content {
    text-align: center;
}

.logo h1 {
    color: white;
    font-size: 2.2rem;
    margin-bottom: 0.5rem;
}

.tagline {
    font-size: 1.1rem;
    opacity: 0.9;
    font-weight: 300;
    color :#FFF;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    padding: 4rem 0;
    text-align: center;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: #1e293b;
    line-height: 1.2;
}

.hero-title .accent {
    color: #3b82f6;
    position: relative;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: #64748b;
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 4rem;
    margin-top: 3rem;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: #3b82f6;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1rem;
    color: #64748b;
    font-weight: 500;
}

/* Section Styles */
section {
    padding: 4rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-subtitle {
    font-size: 1.2rem;
    color: #64748b;
    margin-top: 0.5rem;
}

/* LLMO Section */
.llmo-section {
    background: white;
}

.llmo-card {
    background: #f8fafc;
    padding: 2.5rem;
    border-radius: 12px;
    margin-bottom: 3rem;
    border-left: 4px solid #3b82f6;
}

.llmo-card h3 {
    color: #1e40af;
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
}

.highlight-box {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    padding: 1.5rem;
    border-radius: 8px;
    margin-top: 1.5rem;
}

.highlight-box strong {
    color: #1e40af;
}

.comparison-chart {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 2rem;
}

.comparison-item {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 2px solid #e2e8f0;
    text-align: center;
}

.comparison-item.current {
    border-color: #3b82f6;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.15);
}

.comparison-item h4 {
    color: #374151;
    margin-bottom: 1.5rem;
}

.process-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 1.5rem 0;
    gap: 0.5rem;
}

.process-step {
    background: #f1f5f9;
    padding: 0.8rem 1.2rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    color: #475569;
}

.comparison-item.current .process-step {
    background: #dbeafe;
    color: #1e40af;
}

.arrow {
    color: #94a3b8;
    font-weight: bold;
}

.process-result {
    font-weight: 600;
    margin-top: 1rem;
}

.accent-text {
    color: #3b82f6;
}

/* Why LLMO Section */
.why-llmo {
    background: #f8fafc;
}

.need-card {
    background: white;
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    margin-bottom: 2rem;
}

.icon-circle {
    width: 60px;
    height: 60px;
    background: #eff6ff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.example-box {
    background: #f0f9ff;
    border-left: 4px solid #0ea5e9;
    padding: 1.5rem;
    margin-top: 1.5rem;
    border-radius: 0 8px 8px 0;
}

.warning-box {
    background: #fef2f2;
    border: 1px solid #fecaca;
    padding: 2rem;
    border-radius: 8px;
    margin-top: 2rem;
}

.warning-box h4 {
    color: #dc2626;
    margin-bottom: 1rem;
}

.warning-box p {
    color: #991b1b;
}

/* Effects Section */
.effects-section {
    background: white;
}

.effects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.effect-card {
    background: #f8fafc;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    border: 2px solid #e2e8f0;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.effect-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border-color: #3b82f6;
}

.effect-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.effect-card h3 {
    color: #1e40af;
    margin-bottom: 1rem;
}

/* AXiY Section */
.axiy-section {
    background: #f8fafc;
}

.axiy-explanation {
    background: white;
    padding: 2.5rem;
    border-radius: 12px;
    margin-bottom: 3rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.lead-text {
    font-size: 1.2rem;
    font-weight: 500;
    color: #374151;
    margin-bottom: 1.5rem;
}

.strategy-box {
    background: white;
    padding: 2.5rem;
    border-radius: 12px;
    border-left: 4px solid #10b981;
}

.strategy-box h3 {
    color: #059669;
    margin-bottom: 2rem;
    font-size: 1.8rem;
}

.strategy-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.strategy-item {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.strategy-number {
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    font-weight: 700;
    font-size: 1.2rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.strategy-content h4 {
    color: #374151;
    margin-bottom: 0.5rem;
}

/* Features Section */
.features-section {
    background: white;
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.feature-category {
    background: #f8fafc;
    padding: 2.5rem;
    border-radius: 12px;
    border: 2px solid #e2e8f0;
}

.feature-category h3 {
    color: #1e40af;
    margin-bottom: 2rem;
    font-size: 1.6rem;
    text-align: center;
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 0.8rem;
    padding: 1rem;
    background: white;
    border-radius: 8px;
}

.feature-item.special {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
}

.feature-bullet {
    color: #64748b;
    font-weight: bold;
    flex-shrink: 0;\
}

.feature-bullet.special {
    color: #f59e0b;
}

.special-note {
    text-align: center;
    margin-top: 2rem;
    padding: 1.5rem;
    background: #fef3c7;
    border-radius: 8px;
    border: 1px solid #fbbf24;
}

.highlight {
    background: linear-gradient(120deg, #fbbf24 0%, #f59e0b 100%);
    color: white;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-weight: 600;
}

/* Challenges Section */
.challenges-section {
    background: #f8fafc;
}

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

.challenge-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    border-left: 4px solid #f59e0b;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.challenge-card h3 {
    color: #d97706;
    margin-bottom: 1rem;
}

/* Summary Section */
.summary-section {
    background: white;
}

.summary-content {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin-bottom: 3rem;
}

.summary-point {
    display: flex;
    gap: 1.5rem;
    padding: 2rem;
    background: #f8fafc;
    border-radius: 12px;
    border-left: 4px solid #3b82f6;
}

.point-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.point-content h3 {
    color: #1e40af;
    margin-bottom: 0.8rem;
}

.key-message {
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    color: white;
    padding: 3rem;
    border-radius: 12px;
    text-align: center;
}

.key-message h3 {
    color: white;
    font-size: 2rem;
    margin-bottom: 2rem;
}

.message-comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin: 2rem 0;
}

.old-era, .new-era {
    background: rgba(255, 255, 255, 0.1);
    padding: 1.5rem;
    border-radius: 8px;
}

.new-era {
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.conclusion {
    font-size: 1.2rem;
    font-weight: 500;
    margin-top: 2rem;
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    text-align: center;
    padding: 4rem 0;
}

.cta-content h2 {
    font-size: 2.5rem;
    color: #1e293b;
    margin-bottom: 1.5rem;
}

.cta-content p {
    font-size: 1.3rem;
    color: #64748b;
    margin-bottom: 2.5rem;
}

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

/* Buttons */
.btn {
    padding: 1rem 2.5rem;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: linear-gradient(135deg, #3b82f6 0%, #1e40af 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #2563eb 0%, #1e3a8a 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
    background: white;
    color: #3b82f6;
    border: 2px solid #3b82f6;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.btn-secondary:hover {
    background: #3b82f6;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.3);
}

/* Footer */
.footer {
    background: #1e293b;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    text-align: center;
    margin-bottom: 2rem;
}

.footer-info h3 {
    color: white;
    margin-bottom: 1rem;
}

.footer-info p {
    color: #94a3b8;
    margin-bottom: 0.5rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #374151;
}

.footer-bottom p {
    color: #94a3b8;
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 2rem;
    }
    
    .comparison-chart {
        grid-template-columns: 1fr;
    }
    
    .process-flow {
        flex-direction: column;
        gap: 1rem;
    }
    
    .arrow {
        transform: rotate(90deg);
    }
    
    .effects-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .message-comparison {
        grid-template-columns: 1fr;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .strategy-item {
        flex-direction: column;
        text-align: center;
    }
    
    .summary-point {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .logo h1 {
        font-size: 1.8rem;
    }
    
    .hero-title {
        font-size: 1.8rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    section {
        padding: 2.5rem 0;
    }
    
    .llmo-card, .axiy-explanation, .need-card {
        padding: 1.5rem;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus states for keyboard navigation */
.btn:focus {
    outline: 3px solid #3b82f6;
    outline-offset: 2px;
}

/* High contrast support */
@media (prefers-contrast: high) {
    .hero-title .accent {
        text-decoration: underline;
    }
    
    .btn-primary {
        border: 2px solid white;
    }
}