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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

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


.navbar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo a {
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-logo i {
    font-size: 1.8rem;
}

.logo-icon {
    width: 32px;
    height: 32px;
    margin-right: 10px;
    vertical-align: middle;
    display: inline-block;
}

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-menu a {
    color: white;
    font-weight: 500;
    padding: 10px 15px;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.nav-menu a:hover,
.nav-menu a.active {
    background: rgba(255,255,255,0.2);
    transform: translateY(-2px);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: white;
    margin: 3px 0;
    transition: 0.3s;
}


.main-content {
    min-height: calc(100vh - 140px);
}


.hero {
    background: url('/cnd/cdn-image-hero.png') center/cover no-repeat;
    color: white;
    padding: 100px 0;
    text-align: center;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}


.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: #ff6b6b;
    color: white;
}

.btn-primary:hover {
    background: #ff5252;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255,107,107,0.4);
}

.btn-secondary {
    background: rgba(255,255,255,0.2);
    color: white;
    border: 2px solid rgba(255,255,255,0.3);
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.3);
    transform: translateY(-2px);
}

.btn-download {
    background: #4CAF50;
    color: white;
}

.btn-download:hover {
    background: #45a049;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(76,175,80,0.4);
}


.features {
    padding: 80px 0;
    background: white;
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: #333;
}

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

.feature-card {
    text-align: center;
    padding: 40px 20px;
    border-radius: 15px;
    background: #f8f9fa;
    transition: all 0.3s ease;
    border: 1px solid #e9ecef;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.1);
    background: white;
}

.feature-card i {
    font-size: 3rem;
    color: #667eea;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #333;
}

.feature-card p {
    color: #666;
    line-height: 1.6;
}


.featured-articles {
    padding: 80px 0;
    background: #f8f9fa;
}

.featured-articles h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: #333;
}


.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.article-card {
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    border: 1px solid #e9ecef;
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.15);
}

.article-card.featured {
    border-left: 4px solid #ff6b6b;
}

.article-image {
    margin-bottom: 20px;
    border-radius: 10px;
    overflow: hidden;
}

.article-image img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.article-card:hover .article-image img {
    transform: scale(1.05);
}

.article-meta {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
    font-size: 0.9rem;
}

.category {
    background: #667eea;
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.date {
    color: #666;
    display: flex;
    align-items: center;
}

.article-card h3 {
    margin-bottom: 15px;
    font-size: 1.3rem;
    line-height: 1.4;
}

.article-card h3 a {
    color: #333;
    transition: color 0.3s ease;
}

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

.article-card p {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.6;
}

.article-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 15px;
    border-top: 1px solid #e9ecef;
}

.views {
    color: #666;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 5px;
}

.read-more {
    color: #667eea;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: all 0.3s ease;
}

.read-more:hover {
    color: #5a6fd8;
    transform: translateX(5px);
}


.downloads-section {
    padding: 60px 0;
}

.page-header {
    text-align: center;
    margin-bottom: 60px;
}

.page-header h1 {
    font-size: 2.5rem;
    color: #333;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.page-header p {
    font-size: 1.1rem;
    color: #666;
}

.download-notice {
    background: linear-gradient(135deg, #ff6b6b, #ff8e8e);
    color: white;
    padding: 30px;
    border-radius: 15px;
    margin-bottom: 40px;
    text-align: center;
}

.notice-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.notice-content i {
    font-size: 2rem;
}

.notice-content h3 {
    margin-bottom: 5px;
    font-size: 1.3rem;
}

.downloads-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.download-card {
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
    display: flex;
    align-items: center;
    gap: 20px;
    transition: all 0.3s ease;
    border: 1px solid #e9ecef;
}

.download-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.15);
}

.download-icon {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.download-info {
    flex: 1;
}

.download-info h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: #333;
}

.download-info p {
    color: #666;
    margin-bottom: 10px;
    line-height: 1.5;
}

.download-meta {
    display: flex;
    gap: 20px;
    font-size: 0.9rem;
    color: #666;
}

.download-action {
    flex-shrink: 0;
}

.download-links {
    text-align: center;
    margin-top: 40px;
}

.link-group {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.link-btn {
    background: white;
    color: #667eea;
    padding: 15px 30px;
    border-radius: 10px;
    border: 2px solid #667eea;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s ease;
}

.link-btn:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102,126,234,0.4);
}


.article-detail {
    padding: 60px 0;
}

.article-content {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    border-radius: 15px;
    padding: 40px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
}

.article-header {
    margin-bottom: 40px;
    padding-bottom: 30px;
    border-bottom: 2px solid #e9ecef;
}

.article-header h1 {
    font-size: 2.2rem;
    color: #333;
    margin-bottom: 20px;
    line-height: 1.3;
}

.article-tags {
    margin-top: 15px;
}

.tag {
    background: #f8f9fa;
    color: #667eea;
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 0.8rem;
    margin-right: 10px;
    border: 1px solid #e9ecef;
}

.article-body {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #444;
    margin-bottom: 40px;
}

.article-body h2 {
    color: #333;
    margin: 30px 0 20px 0;
    font-size: 1.6rem;
}

.article-body h3 {
    color: #333;
    margin: 25px 0 15px 0;
    font-size: 1.3rem;
}

.article-body p {
    margin-bottom: 20px;
}

.article-body ul, .article-body ol {
    margin: 20px 0;
    padding-left: 30px;
}

.article-body li {
    margin-bottom: 10px;
    list-style: disc;
}

.article-body ol li {
    list-style: decimal;
}


.pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 40px;
    flex-wrap: wrap;
}

.page-btn {
    padding: 10px 15px;
    background: white;
    color: #667eea;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.page-btn:hover,
.page-btn.active {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 3px 10px rgba(102,126,234,0.3);
}


.about-section {
    padding: 60px 0;
}

.about-content {
    display: grid;
    gap: 30px;
    max-width: 800px;
    margin: 0 auto;
}

.about-card {
    background: white;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
    border: 1px solid #e9ecef;
}

.about-card h2 {
    color: #333;
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.about-card p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 15px;
}

.about-card ul {
    color: #666;
    padding-left: 20px;
}

.about-card li {
    margin-bottom: 10px;
    list-style: disc;
}


.error-section {
    padding: 100px 0;
    text-align: center;
}

.error-content h1 {
    font-size: 6rem;
    color: #667eea;
    margin-bottom: 20px;
    font-weight: 700;
}

.error-content h2 {
    font-size: 2rem;
    color: #333;
    margin-bottom: 15px;
}

.error-content p {
    color: #666;
    font-size: 1.1rem;
    margin-bottom: 30px;
}


.no-content {
    text-align: center;
    padding: 60px 20px;
    color: #666;
}

.no-content i {
    font-size: 4rem;
    margin-bottom: 20px;
    opacity: 0.5;
}

.no-content p {
    font-size: 1.1rem;
}


.footer {
    background: #2c3e50;
    color: white;
    padding: 40px 0 20px 0;
    margin-top: 60px;
}

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

.footer-section h3,
.footer-section h4 {
    margin-bottom: 20px;
    color: #ecf0f1;
}

.footer-section p,
.footer-section li {
    color: #bdc3c7;
    margin-bottom: 10px;
    line-height: 1.6;
}

.footer-section a {
    color: #bdc3c7;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #ecf0f1;
}

.footer-keywords {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid #34495e;
}

.footer-keywords a {
    color: #3498db;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.footer-keywords a:hover {
    color: #2980b9;
    text-decoration: underline;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #34495e;
    color: #95a5a6;
    font-size: 0.9rem;
    line-height: 1.5;
}


@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }
    
    .downloads-grid {
        grid-template-columns: 1fr;
    }
    
    .download-card {
        flex-direction: column;
        text-align: center;
    }
    
    .article-content {
        padding: 20px;
        margin: 0 10px;
    }
    
    .article-header h1 {
        font-size: 1.8rem;
    }
    
    .page-header h1 {
        font-size: 2rem;
        flex-direction: column;
        gap: 10px;
    }
    
    .notice-content {
        flex-direction: column;
        text-align: center;
    }
    
    .link-group {
        flex-direction: column;
        align-items: center;
    }
    
    .pagination {
        justify-content: center;
    }
    
    .error-content h1 {
        font-size: 4rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 60px 0;
    }
    
    .hero-content h1 {
        font-size: 1.8rem;
    }
    
    .features {
        padding: 40px 0;
    }
    
    .featured-articles {
        padding: 40px 0;
    }
    
    .downloads-section,
    .articles-section,
    .article-detail,
    .about-section {
        padding: 40px 0;
    }
    
    .article-content {
        padding: 15px;
    }
    
    .download-card {
        padding: 20px;
    }
    
    .feature-card {
        padding: 30px 15px;
    }
}


@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.article-card,
.feature-card,
.download-card {
    animation: fadeInUp 0.6s ease-out;
}


::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #667eea;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #5a6fd8;
}