:root {
    --bg-color: #ffffff;
    --surface-color: #f8fafc;
    --surface-hover: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --accent-primary: #00C300;
    --accent-secondary: #009e00;
    --accent-gradient: linear-gradient(135deg, #00C300 0%, #009e00 100%);
    --accent-glow: 0 0 40px rgba(0, 195, 0, 0.2);
    --border-color: #e2e8f0;
    --font-main: 'Outfit', 'Noto Sans JP', sans-serif;
    --container-width: 1200px;
    --header-height: 80px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.8;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    line-height: 1.4;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
}

/* Layout Utilities */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
    position: relative;
}

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

.sp-only {
    display: none;
}

/* Header */
.header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo-text {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary);
}

.logo-sub {
    font-weight: 400;
    color: var(--text-secondary);
}

.line-brand {
    font-weight: 700;
    color: var(--accent-primary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 32px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    line-height: 1;
}

.btn-sm {
    padding: 10px 20px;
    font-size: 0.9rem;
}

.btn-lg {
    padding: 20px 40px;
    font-size: 1.2rem;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 195, 0, 0.3);
}

.btn-secondary {
    background: white;
    color: var(--accent-primary);
    border: 2px solid var(--accent-primary);
}

.btn-secondary:hover {
    background: var(--surface-hover);
    transform: translateY(-2px);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--header-height);
    background: radial-gradient(circle at 50% 50%, rgba(0, 195, 0, 0.05) 0%, rgba(255, 255, 255, 0) 70%);
}

.hero-catch {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: 16px;
}

.hero-title {
    font-size: clamp(2rem, 4vw, 3.5rem);
    margin-bottom: 24px;
    line-height: 1.2;
}

.hero-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* Section Headers */
.section-header {
    margin-bottom: 60px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.section-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 12px;
}

.section-title {
    font-size: clamp(2rem, 3vw, 2.5rem);
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* Challenges Section */
.challenges {
    background: var(--surface-color);
}

.challenges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.challenge-card {
    background: white;
    padding: 30px;
    border-radius: 16px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    text-align: center;
    transition: transform 0.3s ease;
}

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

.challenge-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

/* Solutions Section */
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.solution-card {
    background: white;
    padding: 30px;
    border-radius: 24px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
    height: 100%;
    border: 1px solid var(--border-color);
    position: relative;
}

.solution-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-primary);
}

.solution-card.featured {
    background: linear-gradient(135deg, rgba(0, 195, 0, 0.03) 0%, rgba(0, 158, 0, 0.08) 100%);
    border-color: rgba(0, 195, 0, 0.3);
}

.solution-badge {
    position: absolute;
    top: -10px;
    left: 24px;
    background: var(--accent-gradient);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.solution-card h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    line-height: 1.4;
    color: var(--text-primary);
}

.solution-card.featured h3 {
    margin-top: 10px;
}

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

/* Features Section */
.features {
    background: var(--surface-color);
}

.features-wrapper {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.feature-block {
    background: white;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.feature-block-header {
    background: var(--accent-gradient);
    color: white;
    padding: 30px;
    text-align: center;
}

.feature-block-header.customizable {
    background: linear-gradient(135deg, #64748b 0%, #475569 100%);
}

.feature-block-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 12px;
}

.feature-block-header h3 {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.feature-block-header p {
    font-size: 0.9rem;
    opacity: 0.9;
}

.feature-list {
    list-style: none;
    padding: 30px;
}

.feature-list li {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    align-items: flex-start;
}

.feature-list li:last-child {
    margin-bottom: 0;
}

.feature-check {
    width: 28px;
    height: 28px;
    background: var(--accent-gradient);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
    font-size: 0.9rem;
}

.feature-check.custom {
    background: linear-gradient(135deg, #64748b 0%, #475569 100%);
}

.feature-list strong {
    display: block;
    font-size: 1.1rem;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.feature-list p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Use Cases Section */
.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.use-case-card {
    background: white;
    padding: 40px;
    border-radius: 24px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.use-case-card:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.use-case-header {
    margin-bottom: 20px;
}

.use-case-tag {
    display: inline-block;
    padding: 4px 12px;
    background: var(--surface-color);
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.use-case-card h3 {
    font-size: 1.5rem;
}

/* Synergy Section */
.synergy {
    background: linear-gradient(180deg, var(--bg-color) 0%, var(--surface-color) 100%);
}

.synergy-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.synergy-card {
    background: white;
    padding: 40px 30px;
    border-radius: 24px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all 0.3s ease;
}

.synergy-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-primary);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.synergy-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    display: block;
}

.synergy-card h3 {
    font-size: 1.3rem;
    margin-bottom: 16px;
    color: var(--accent-primary);
}

.synergy-card p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 0.95rem;
}

/* Flow Section */
.flow {
    background: var(--bg-color);
}

.flow-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.flow-step {
    background: var(--surface-color);
    padding: 30px;
    border-radius: 16px;
    position: relative;
    text-align: center;
    transition: all 0.3s ease;
}

.flow-step:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
}

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

.flow-step h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
}

.flow-step p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* Footer */
.footer {
    padding: 100px 0 40px;
    text-align: center;
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    color: white;
}

.footer-catchcopy {
    font-size: 1.1rem;
    color: var(--accent-primary);
    margin-bottom: 24px;
    line-height: 1.8;
    font-weight: 500;
}

.footer-title {
    font-size: 2rem;
    margin-bottom: 20px;
}

.footer-desc {
    color: #94a3b8;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.footer-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 80px;
    flex-wrap: wrap;
}

.company-info {
    color: #64748b;
    font-size: 0.9rem;
    border-top: 1px solid #334155;
    padding-top: 40px;
}

/* Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 1024px) {
    .features-wrapper {
        grid-template-columns: 1fr;
    }
    
    .synergy-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .sp-only {
        display: block;
    }
    
    .hero-container {
        text-align: center;
    }

    .hero-cta {
        justify-content: center;
        flex-direction: column;
        align-items: center;
    }
    
    .hero-cta .btn {
        width: 100%;
        max-width: 300px;
    }

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

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

    .use-cases-grid {
        grid-template-columns: 1fr;
    }

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

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

    .section {
        padding: 60px 0;
    }
    
    .section-header {
        margin-bottom: 40px;
    }
    
    .btn-lg {
        padding: 16px 32px;
        font-size: 1rem;
    }
    
    .footer-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-buttons .btn {
        width: 100%;
        max-width: 300px;
    }
}