:root {
            --primary: #1a365d;
            --secondary: #2d3748;
            --accent: #e53e3e;
            --light: #f7fafc;
            --dark: #171923;
            --gray: #718096;
            --transition: all 0.3s ease;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --radius: 8px;
            --max-width: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            line-height: 1.7;
            color: var(--dark);
            background-color: var(--light);
            overflow-x: hidden;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: var(--primary);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo:hover {
            color: #90cdf4;
        }
        .my-logo i {
            color: var(--accent);
        }
        .breadcrumb {
            background: var(--secondary);
            color: #cbd5e0;
            padding: 0.75rem 0;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: #90cdf4;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            font-weight: 500;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover {
            color: #90cdf4;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: var(--transition);
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        .hero {
            background: linear-gradient(rgba(26, 54, 93, 0.9), rgba(45, 55, 72, 0.9)), url('https://images.unsplash.com/photo-1534423861386-85a16f5d13fd?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            text-align: center;
            padding: 4rem 1rem;
            margin-bottom: 3rem;
            border-radius: 0 0 var(--radius) var(--radius);
        }
        .hero h1 {
            font-size: 2.8rem;
            margin-bottom: 1rem;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
        }
        .hero p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto;
            opacity: 0.9;
        }
        .search-container {
            max-width: 600px;
            margin: 2rem auto;
            background: white;
            padding: 1.5rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .search-form {
            display: flex;
        }
        .search-form input {
            flex: 1;
            padding: 0.8rem 1rem;
            border: 2px solid #e2e8f0;
            border-radius: var(--radius) 0 0 var(--radius);
            font-size: 1rem;
            outline: none;
        }
        .search-form input:focus {
            border-color: var(--accent);
        }
        .search-form button {
            background: var(--accent);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 var(--radius) var(--radius) 0;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-form button:hover {
            background: #c53030;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin: 3rem 0;
        }
        .article-content {
            background: white;
            padding: 2.5rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            color: var(--gray);
            font-size: 0.9rem;
            margin-bottom: 2rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid #e2e8f0;
        }
        .last-updated {
            color: var(--accent);
            font-weight: 600;
        }
        h1, h2, h3, h4 {
            color: var(--primary);
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        h1 { font-size: 2.5rem; }
        h2 { font-size: 2rem; border-left: 4px solid var(--accent); padding-left: 1rem; margin-top: 3rem; }
        h3 { font-size: 1.6rem; color: var(--secondary); }
        h4 { font-size: 1.3rem; color: var(--gray); }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 500;
            color: var(--secondary);
            margin-bottom: 2rem;
        }
        .highlight {
            background: linear-gradient(120deg, #fed7d7 0%, #fed7d7 100%);
            background-repeat: no-repeat;
            background-size: 100% 40%;
            background-position: 0 90%;
            padding: 0 0.2rem;
            font-weight: 600;
        }
        em {
            color: var(--accent);
            font-style: normal;
            font-weight: 600;
        }
        blockquote {
            border-left: 4px solid var(--accent);
            padding-left: 1.5rem;
            margin: 2rem 0;
            color: var(--secondary);
            font-style: italic;
        }
        .featured-image {
            width: 100%;
            margin: 2rem 0;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .img-caption {
            text-align: center;
            font-size: 0.9rem;
            color: var(--gray);
            margin-top: 0.5rem;
            font-style: italic;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background: white;
            padding: 1.5rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            margin-top: 0;
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e2e8f0;
        }
        .comment-form, .rating-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        .form-group label {
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--secondary);
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            padding: 0.8rem;
            border: 2px solid #e2e8f0;
            border-radius: var(--radius);
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--accent);
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            font-size: 1.5rem;
            color: #e2e8f0;
            cursor: pointer;
        }
        .stars i:hover,
        .stars i.active {
            color: #f6e05e;
        }
        .btn {
            background: var(--accent);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: var(--radius);
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            align-self: flex-start;
        }
        .btn:hover {
            background: #c53030;
            transform: translateY(-2px);
        }
        .related-links {
            list-style: none;
        }
        .related-links li {
            margin-bottom: 0.8rem;
            padding-bottom: 0.8rem;
            border-bottom: 1px solid #e2e8f0;
        }
        .related-links a {
            display: flex;
            align-items: center;
            gap: 0.8rem;
            color: var(--secondary);
        }
        .related-links a:hover {
            color: var(--accent);
        }
        .site-footer {
            background: var(--dark);
            color: #cbd5e0;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-widget h4 {
            color: white;
            margin-top: 0;
            margin-bottom: 1.5rem;
            font-size: 1.2rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #a0aec0;
        }
        .footer-links a:hover {
            color: white;
        }
        friend-link {
            display: block;
            background: var(--secondary);
            padding: 1rem;
            border-radius: var(--radius);
            margin: 1rem 0;
            border-left: 4px solid var(--accent);
        }
        friend-link a {
            color: white;
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #2d3748;
            font-size: 0.9rem;
            color: #718096;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav {
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background: var(--primary);
                padding: 1rem;
                transform: translateY(-100%);
                opacity: 0;
                visibility: hidden;
                transition: var(--transition);
                box-shadow: var(--shadow);
            }
            .main-nav.active {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 1rem;
            }
            .header-container {
                flex-wrap: wrap;
            }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.7rem; }
            h3 { font-size: 1.4rem; }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 15px;
            }
            .article-content {
                padding: 1.5rem;
            }
            .hero {
                padding: 3rem 1rem;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
        }
        .text-center { text-align: center; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .mt-2 { margin-top: 2rem; }
        .py-2 { padding-top: 2rem; padding-bottom: 2rem; }