:root {
    --primary-color: #4A90E2;
    --secondary-color: #2E5F8E;
    --accent-color: #88B04B;
    --text-dark: #2C3E50;
    --text-light: #7F8C8D;
    --bg-light: #F8FAFB;
    --bg-white: #FFFFFF;
    --border-color: #E1E8ED;
    --success-color: #27AE60;
    --warning-color: #F39C12;
    --error-color: #E74C3C;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.7;
    color: var(--text-dark);
    background-color: var(--bg-white);
}

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

.container-wide {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

.container-narrow {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background-color: var(--bg-white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    padding: 1rem 0;
    position: relative;
}

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

.logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo {
    height: 60px;
    width: auto;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

nav a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s ease;
    padding: 0.5rem 0;
}

nav a:hover {
    color: var(--primary-color);
}

.hero {
    position: relative;
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.8), rgba(46, 95, 142, 0.6));
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: white;
    max-width: 800px;
    padding: 3rem 1rem;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    font-weight: 700;
    line-height: 1.2;
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.cta-button {
    display: inline-block;
    background-color: var(--accent-color);
    color: white;
    padding: 1rem 2.5rem;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.cta-button:hover {
    background-color: #6fa037;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

section {
    padding: 5rem 0;
}

.section-light {
    background-color: var(--bg-light);
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
    text-align: center;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-light);
    text-align: center;
    margin-bottom: 3rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.feature-card {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: center;
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.6;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.blog-card {
    background: var(--bg-white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.blog-card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.blog-card-content {
    padding: 1.5rem;
}

.blog-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.blog-card h3 {
    font-size: 1.4rem;
    margin-bottom: 0.8rem;
    color: var(--text-dark);
}

.blog-card h3 a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

.blog-card h3 a:hover {
    color: var(--primary-color);
}

.blog-excerpt {
    color: var(--text-light);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.read-more {
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
    transition: color 0.3s ease;
}

.read-more:hover {
    color: var(--secondary-color);
}

.blog-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 3rem 1rem;
}

.blog-header {
    margin-bottom: 3rem;
}

.blog-title {
    font-size: 2.8rem;
    line-height: 1.3;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.blog-featured-image {
    width: 100%;
    height: auto;
    border-radius: 12px;
    margin: 2rem 0;
}

.blog-content img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 2rem 0;
}

.blog-content h2 {
    font-size: 2rem;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.blog-content h3 {
    font-size: 1.6rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.blog-content p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.blog-content ul, .blog-content ol {
    margin: 1.5rem 0 1.5rem 2rem;
    line-height: 1.8;
}

.blog-content li {
    margin-bottom: 0.8rem;
}

.blog-content blockquote {
    border-left: 4px solid var(--primary-color);
    padding: 1.5rem 2rem;
    margin: 2rem 0;
    background: var(--bg-light);
    font-style: italic;
    color: var(--text-light);
}

.blog-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
}

.blog-content th, .blog-content td {
    border: 1px solid var(--border-color);
    padding: 1rem;
    text-align: left;
}

.blog-content th {
    background-color: var(--bg-light);
    font-weight: 600;
}

.video-container {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    margin: 2rem 0;
    border-radius: 8px;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.highlight-box {
    background: linear-gradient(135deg, #4A90E2, #88B04B);
    color: white;
    padding: 2rem;
    border-radius: 12px;
    margin: 2rem 0;
}

.author-box {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 12px;
    margin: 3rem 0;
    display: flex;
    gap: 2rem;
    align-items: center;
}

.author-image {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.author-info h4 {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.author-info .author-title {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.author-info p {
    color: var(--text-light);
    line-height: 1.6;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-links a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.social-links a:hover {
    color: var(--secondary-color);
}

.faq-section {
    margin: 3rem 0;
}

.faq-item {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 1rem;
    overflow: hidden;
}

.faq-question {
    padding: 1.5rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s ease;
}

.faq-question:hover {
    background: var(--bg-light);
}

.faq-answer {
    padding: 0 1.5rem 1.5rem;
    color: var(--text-light);
    line-height: 1.8;
}

.related-posts {
    margin: 4rem 0;
    padding: 2rem;
    background: var(--bg-light);
    border-radius: 12px;
}

.related-posts h3 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
}

.related-posts ul {
    list-style: none;
    margin: 0;
}

.related-posts li {
    margin-bottom: 1rem;
}

.related-posts a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.related-posts a:hover {
    color: var(--secondary-color);
}

.references-section {
    margin: 3rem 0;
    padding: 2rem;
    background: var(--bg-light);
    border-radius: 12px;
}

.references-section h3 {
    font-size: 1.6rem;
    margin-bottom: 1rem;
}

.references-section ol {
    margin-left: 1.5rem;
}

.references-section li {
    margin-bottom: 0.8rem;
}

.contact-form {
    max-width: 600px;
    margin: 2rem auto;
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-dark);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.submit-button {
    background-color: var(--primary-color);
    color: white;
    padding: 1rem 2.5rem;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.submit-button:hover {
    background-color: var(--secondary-color);
}

.policy-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 3rem 1rem;
}

.policy-content h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.policy-content h2 {
    font-size: 2rem;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.policy-content h3 {
    font-size: 1.5rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.policy-content p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.policy-content ul {
    margin: 1.5rem 0 1.5rem 2rem;
    line-height: 1.8;
}

footer {
    background-color: var(--text-dark);
    color: white;
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h3 {
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: 0.8rem;
}

.footer-section a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: white;
}

.footer-logo {
    height: 50px;
    width: auto;
    margin-bottom: 1rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.6);
}

.about-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
    margin: 3rem 0;
}

.about-image {
    width: 100%;
    border-radius: 12px;
}

.about-content h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.about-content p {
    margin-bottom: 1.2rem;
    line-height: 1.8;
}

@media (max-width: 968px) {
    nav ul {
        gap: 1rem;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .about-layout {
        grid-template-columns: 1fr;
    }
    
    .blog-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
    
    .author-box {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        gap: 1rem;
    }
    
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1.1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .blog-title {
        font-size: 2rem;
    }
}