* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #f8f9fa;
            color: #333;
            line-height: 1.6;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            color: #0056b3;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #ff6b00;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .site-header {
            background: linear-gradient(135deg, #001f3f 0%, #003366 100%);
            color: white;
            padding: 1rem 2rem;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .header-container {
            max-width: 1300px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 2.2rem;
            font-weight: 800;
            color: white;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
        }
        .logo i {
            color: #ffcc00;
            margin-right: 10px;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
        }
        .main-nav li {
            margin-left: 2rem;
        }
        .main-nav a {
            color: #e0e0e0;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover {
            color: #ffcc00;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            bottom: 0;
            left: 0;
            background-color: #ffcc00;
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: white;
        }
        .breadcrumb {
            background-color: #e9ecef;
            padding: 0.8rem 2rem;
            font-size: 0.9rem;
            border-bottom: 1px solid #ddd;
        }
        .breadcrumb a {
            color: #555;
        }
        .breadcrumb a:hover {
            color: #0056b3;
        }
        .container {
            max-width: 1200px;
            margin: 2rem auto;
            padding: 0 2rem;
            flex: 1;
            display: grid;
            grid-template-columns: 3fr 1fr;
            gap: 3rem;
        }
        @media (max-width: 992px) {
            .container {
                grid-template-columns: 1fr;
            }
        }
        article {
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.07);
        }
        article h1 {
            font-size: 2.8rem;
            color: #003366;
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        article h2 {
            font-size: 2rem;
            color: #0056b3;
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #eee;
        }
        article h3 {
            font-size: 1.5rem;
            color: #333;
            margin: 1.8rem 0 0.8rem;
        }
        article p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .intro {
            font-size: 1.2rem;
            color: #555;
            background: #f0f8ff;
            padding: 1.5rem;
            border-left: 5px solid #0056b3;
            margin-bottom: 2.5rem;
            border-radius: 0 8px 8px 0;
        }
        .highlight {
            background-color: #fffacd;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
            border-left: 4px solid #ffcc00;
        }
        .figure {
            margin: 2.5rem auto;
            text-align: center;
        }
        .figure img {
            border-radius: 10px;
            box-shadow: 0 8px 16px rgba(0,0,0,0.1);
            border: 1px solid #ddd;
        }
        .figcaption {
            margin-top: 0.8rem;
            font-style: italic;
            color: #666;
            font-size: 0.95rem;
        }
        aside {
            background: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.07);
            align-self: start;
        }
        .widget {
            margin-bottom: 2.5rem;
        }
        .widget h3 {
            color: #003366;
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #eee;
            font-size: 1.4rem;
        }
        .search-box form {
            display: flex;
        }
        .search-box input {
            flex: 1;
            padding: 0.8rem 1rem;
            border: 2px solid #ddd;
            border-radius: 8px 0 0 8px;
            font-size: 1rem;
        }
        .search-box button {
            background: #0056b3;
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            font-size: 1rem;
            transition: background 0.3s;
        }
        .search-box button:hover {
            background: #ff6b00;
        }
        .related-links ul {
            list-style: none;
        }
        .related-links li {
            margin-bottom: 0.8rem;
            padding-bottom: 0.8rem;
            border-bottom: 1px dashed #eee;
        }
        .related-links a {
            color: #333;
            display: flex;
            align-items: center;
        }
        .related-links a:hover {
            color: #0056b3;
        }
        .related-links i {
            margin-right: 10px;
            color: #ff6b00;
        }
        .interactive-section {
            background: #f8f9fa;
            padding: 2rem;
            border-radius: 10px;
            margin: 2.5rem 0;
            border: 1px solid #e0e0e0;
        }
        .interactive-section h3 {
            color: #0056b3;
        }
        .rating-form, .comment-form {
            margin-top: 1.5rem;
        }
        .rating-stars {
            display: flex;
            gap: 0.5rem;
            margin-bottom: 1rem;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .rating-stars input:checked ~ label,
        .rating-stars label:hover,
        .rating-stars label:hover ~ label {
            color: #ffcc00;
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #555;
        }
        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 0.8rem;
            border: 2px solid #ddd;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            border-color: #0056b3;
            outline: none;
        }
        .submit-btn {
            background: #0056b3;
            color: white;
            border: none;
            padding: 0.9rem 2rem;
            border-radius: 8px;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            transition: background 0.3s, transform 0.2s;
        }
        .submit-btn:hover {
            background: #ff6b00;
            transform: translateY(-2px);
        }
        footer {
            background: #001f3f;
            color: #ccc;
            padding: 3rem 2rem 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            max-width: 1300px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 800;
            color: white;
            margin-bottom: 1rem;
        }
        .footer-links h4 {
            color: #ffcc00;
            margin-bottom: 1.2rem;
            font-size: 1.2rem;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.7rem;
        }
        .footer-links a {
            color: #ccc;
        }
        .footer-links a:hover {
            color: #ffcc00;
        }
        friend-link {
            display: block;
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid #003366;
        }
        friend-link h4 {
            color: #ffcc00;
            margin-bottom: 1rem;
        }
        friend-link a {
            color: #66b3ff;
        }
        .copyright {
            text-align: center;
            margin-top: 3rem;
            padding-top: 1.5rem;
            border-top: 1px solid #003366;
            font-size: 0.9rem;
            color: #aaa;
        }
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
            }
            .main-nav ul {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #002b55;
                position: absolute;
                top: 100%;
                left: 0;
                z-index: 1000;
                padding: 1rem 0;
            }
            .main-nav.active ul {
                display: flex;
            }
            .main-nav li {
                margin: 0;
                text-align: center;
                padding: 0.8rem 0;
                border-bottom: 1px solid #004080;
            }
            article {
                padding: 1.8rem;
            }
            article h1 {
                font-size: 2.2rem;
            }
            .container {
                padding: 0 1.5rem;
                gap: 2rem;
            }
            .intro {
                padding: 1.2rem;
                font-size: 1.1rem;
            }
        }