* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f8f9fa;
            max-width: 100%;
            overflow-x: hidden;
        }
        a {
            color: #2a5caa;
            text-decoration: none;
            transition: color 0.3s ease, background-color 0.3s ease;
        }
        a:hover {
            color: #1e3d6f;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul, ol {
            padding-left: 2em;
            margin: 1em 0;
        }
        h1, h2, h3, h4 {
            font-family: Georgia, 'Times New Roman', Times, serif;
            color: #1a365d;
            margin-top: 1.5em;
            margin-bottom: 0.75em;
            line-height: 1.3;
        }
        h1 {
            font-size: 2.8rem;
            border-bottom: 4px solid #d4af37;
            padding-bottom: 0.3em;
        }
        h2 {
            font-size: 2.2rem;
            border-left: 5px solid #2a5caa;
            padding-left: 15px;
        }
        h3 {
            font-size: 1.8rem;
            color: #2a5caa;
        }
        h4 {
            font-size: 1.4rem;
            color: #444;
        }
        p {
            margin-bottom: 1.5em;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            color: #555;
            font-weight: 500;
        }
        .highlight {
            background-color: #fffacd;
            padding: 0.2em 0.4em;
            border-radius: 3px;
            font-weight: 600;
        }
        .last-updated {
            font-style: italic;
            color: #666;
            font-size: 0.95rem;
            text-align: right;
            padding: 10px 0;
            border-top: 1px dashed #ccc;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #1a365d 0%, #2a5caa 100%);
            color: white;
            padding: 1.5rem 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo a {
            font-family: 'Palatino Linotype', 'Book Antiqua', Palatino, serif;
            font-size: 2.5rem;
            font-weight: 700;
            color: #d4af37;
            text-decoration: none;
            letter-spacing: 1px;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
        }
        .my-logo a:hover {
            color: #ffd700;
            text-decoration: none;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
        }
        .main-nav li {
            margin-left: 2rem;
        }
        .main-nav a {
            color: #e2e8f0;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover {
            color: #ffd700;
            text-decoration: none;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background-color: #ffd700;
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            background: transparent;
            border: none;
        }
        .hamburger span {
            height: 3px;
            width: 25px;
            background: #d4af37;
            margin: 4px 0;
            border-radius: 2px;
            transition: 0.3s;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #edf2f7;
            font-size: 0.9rem;
            margin-bottom: 2rem;
            border-radius: 5px;
            padding-left: 20px;
        }
        .breadcrumb a {
            color: #4a5568;
        }
        .breadcrumb a:hover {
            color: #2a5caa;
        }
        .breadcrumb .separator {
            margin: 0 8px;
            color: #718096;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin: 2rem 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background: white;
            padding: 2.5rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .sidebar {
            background: white;
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .interactive-module {
            background: #f1f8ff;
            border-left: 5px solid #2a5caa;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .module-title {
            margin-top: 0;
            color: #1a365d;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .module-title i {
            color: #d4af37;
        }
        form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        input, textarea, select {
            padding: 0.8rem;
            border: 1px solid #cbd5e0;
            border-radius: 5px;
            font-family: inherit;
            font-size: 1rem;
            width: 100%;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #2a5caa;
            box-shadow: 0 0 0 3px rgba(42, 92, 170, 0.2);
        }
        button, .btn {
            background: linear-gradient(to right, #2a5caa, #1a365d);
            color: white;
            border: none;
            padding: 0.9rem 1.5rem;
            border-radius: 5px;
            cursor: pointer;
            font-weight: 600;
            transition: all 0.3s ease;
            text-align: center;
            display: inline-block;
        }
        button:hover, .btn:hover {
            background: linear-gradient(to right, #1a365d, #2a5caa);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            text-decoration: none;
        }
        .rating {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: #e4e4e4;
            margin: 1rem 0;
        }
        .rating label {
            cursor: pointer;
        }
        .rating input {
            display: none;
        }
        .rating input:checked ~ label,
        .rating label:hover,
        .rating label:hover ~ label {
            color: #ffd700;
        }
        .featured-image {
            margin: 2.5rem auto;
            text-align: center;
            max-width: 800px;
        }
        .featured-image img {
            border-radius: 10px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
            border: 5px solid white;
        }
        .image-caption {
            font-style: italic;
            color: #666;
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .site-footer {
            background: #1a365d;
            color: #cbd5e0;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-section h4 {
            color: #d4af37;
            font-size: 1.2rem;
            margin-bottom: 1.5rem;
        }
        .footer-section ul {
            list-style: none;
            padding-left: 0;
        }
        .footer-section li {
            margin-bottom: 0.8rem;
        }
        .footer-section a {
            color: #a0aec0;
        }
        .footer-section a:hover {
            color: #ffd700;
        }
        friend-link {
            display: block;
            background: #2d3748;
            padding: 1rem;
            border-radius: 5px;
            margin: 1rem 0;
            border-left: 4px solid #d4af37;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #2d3748;
            font-size: 0.9rem;
            color: #a0aec0;
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .header-container { flex-wrap: wrap; }
            .main-nav {
                width: 100%;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.5s ease-out;
            }
            .main-nav.active {
                max-height: 300px;
                margin-top: 1rem;
            }
            .main-nav ul {
                flex-direction: column;
                width: 100%;
            }
            .main-nav li {
                margin: 0;
                width: 100%;
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
            .main-nav a {
                display: block;
                padding: 1rem 0;
            }
            .hamburger {
                display: flex;
            }
            .article-content {
                padding: 1.5rem;
            }
        }