:root {
    --primary-color: #1a365d;
    --secondary-color: #2d3748;
    --accent-color: #2f855a;
    --border-color: #e2e8f0;
    --background-color: #ffffff;
    --text-color: #2d3748;
    --light-gray: #f7fafc;
    --error-color: #c53030;
    --success-color: #2f855a;
    --font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.header {
    background-color: var(--background-color);
    border-bottom: 2px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.header-branding {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.logo {
    width: 60px;
    height: 60px;
    object-fit: contain;
}

.site-title h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.site-subtitle {
    font-size: 0.875rem;
    color: var(--secondary-color);
    opacity: 0.8;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    position: absolute;
    top: 1.5rem;
    right: 1rem;
}

.menu-bar {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--primary-color);
    margin: 5px 0;
    transition: 0.3s;
}

.main-nav {
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
}

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

.nav-link {
    text-decoration: none;
    color: var(--secondary-color);
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
    transition: color 0.3s;
}

.nav-link:hover {
    color: var(--accent-color);
}

.nav-link.active {
    color: var(--accent-color);
    font-weight: 600;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--accent-color);
}

.main-content {
    flex: 1;
    padding: 2rem 0;
}

.hero {
    background-color: var(--light-gray);
    border-left: 4px solid var(--accent-color);
    padding: 2rem;
    margin-bottom: 2rem;
}

.hero h2 {
    color: var(--primary-color);
    font-size: 1.75rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.125rem;
    color: var(--secondary-color);
}

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

.card {
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 1.5rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.card p {
    margin-bottom: 1rem;
}

.btn-link {
    display: inline-block;
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 0;
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s;
}

.btn-link:hover {
    border-bottom-color: var(--accent-color);
}

.notice-box {
    background-color: #fff8e1;
    border: 1px solid #ffd54f;
    padding: 1.5rem;
    margin: 2rem 0;
}

.notice-box.important-notice {
    background-color: #ffebee;
    border-color: #ef5350;
}

.notice-box h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.content-section {
    margin-bottom: 2rem;
}

.content-section h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.375rem;
}

.content-section p {
    margin-bottom: 1rem;
}

.standard-list {
    list-style-position: inside;
    margin-bottom: 1rem;
}

.standard-list li {
    margin-bottom: 0.5rem;
    padding-left: 0.5rem;
}

.profile-section {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
    align-items: flex-start;
}

.profile-image {
    flex-shrink: 0;
}

.profile-image img {
    width: 200px;
    height: 200px;
    object-fit: cover;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.profile-info h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.profile-role {
    color: var(--accent-color);
    font-weight: 500;
    margin-bottom: 1rem;
    font-size: 1.125rem;
}

.purpose-list, .legal-points, .security-points, .development-guide {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 1.5rem 0;
}

.purpose-item, .legal-point, .security-point, .guide-item {
    padding: 1rem;
    background-color: var(--light-gray);
    border-left: 3px solid var(--accent-color);
}

.purpose-item h4, .legal-point h4, .security-point h4, .guide-item h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 1.5rem 0;
}

.project-card {
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    background-color: var(--light-gray);
}

.project-card h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.project-status {
    color: var(--accent-color);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.project-description {
    margin-bottom: 0.5rem;
}

.project-url {
    font-family: monospace;
    color: var(--secondary-color);
    font-size: 0.875rem;
    padding: 0.25rem 0.5rem;
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
}

.page-intro {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    color: var(--secondary-color);
}

.contact-container {
    max-width: 800px;
    margin: 0 auto;
}

.contact-form {
    background-color: var(--light-gray);
    padding: 2rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--primary-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: var(--font-family);
    font-size: 1rem;
    background-color: var(--background-color);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(47, 133, 90, 0.1);
}

.form-notice {
    background-color: #e8f5e9;
    border: 1px solid #a5d6a7;
    padding: 1rem;
    margin-bottom: 1.5rem;
    border-radius: 4px;
}

.submit-btn {
    background-color: var(--accent-color);
    color: white;
    border: none;
    padding: 0.75rem 2rem;
    font-size: 1rem;
    font-weight: 500;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.submit-btn:hover {
    background-color: #276749;
}

.form-status {
    margin-top: 1.5rem;
    padding: 1rem;
    border-radius: 4px;
    display: none;
}

.form-status.success {
    background-color: #e8f5e9;
    border: 1px solid #a5d6a7;
    color: var(--success-color);
    display: block;
}

.form-status.error {
    background-color: #ffebee;
    border: 1px solid #ef9a9a;
    color: var(--error-color);
    display: block;
}

.policy-meta {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    color: var(--secondary-color);
    font-size: 0.875rem;
}

.footer {
    background-color: var(--primary-color);
    color: white;
    padding: 2rem 0;
    margin-top: auto;
}

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

.footer-disclaimer {
    background-color: rgba(255, 255, 255, 0.1);
    padding: 1rem;
    margin-bottom: 1.5rem;
    border-radius: 4px;
}

.footer-disclaimer p {
    margin-bottom: 0.5rem;
}

.footer-links {
    margin-bottom: 1.5rem;
}

.footer-links a {
    color: white;
    text-decoration: none;
    margin: 0 0.5rem;
}

.footer-links a:hover {
    text-decoration: underline;
}

.footer-signature {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 1.5rem;
    padding: 1rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.signature-img {
    width: 120px;
    height: 60px;
    object-fit: contain;
    margin-bottom: 0.5rem;
}

.footer-copyright {
    text-align: center;
    font-size: 0.875rem;
    opacity: 0.8;
}

@media (max-width: 768px) {
    .header-branding {
        flex-direction: column;
        text-align: center;
        gap: 0.5rem;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .main-nav {
        display: none;
        border-top: none;
        padding-top: 0;
    }
    
    .main-nav.active {
        display: block;
    }
    
    .nav-list {
        flex-direction: column;
        gap: 0;
    }
    
    .nav-link {
        display: block;
        padding: 0.75rem 0;
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-link.active::after {
        display: none;
    }
    
    .profile-section {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .profile-image img {
        width: 150px;
        height: 150px;
    }
    
    .grid-container {
        grid-template-columns: 1fr;
    }
    
    .hero {
        padding: 1.5rem;
    }
    
    .hero h2 {
        font-size: 1.5rem;
    }
    
    .contact-form {
        padding: 1.5rem;
    }
    
    .purpose-list, .legal-points, .security-points, .development-guide {
        grid-template-columns: 1fr;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .site-title h1 {
        font-size: 1.25rem;
    }
    
    .hero h2 {
        font-size: 1.25rem;
    }
    
    .card, .notice-box, .contact-form {
        padding: 1rem;
    }
}