* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #1a237e;
            --secondary-color: #e65100;
            --accent-color: #ffd600;
            --text-color: #333;
            --light-bg: #f5f5f5;
            --border-color: #ddd;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-color);
            background-color: #fff;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: var(--primary-color);
            color: white;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .my-logo {
            font-family: 'Arial Black', Gadget, sans-serif;
            font-size: 1.8rem;
            color: var(--accent-color);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: #ff5722;
        }
        .my-logo:hover {
            color: white;
        }
        .desktop-nav ul {
            display: flex;
            list-style: none;
            gap: 25px;
        }
        .desktop-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 8px 12px;
            border-radius: 4px;
            transition: var(--transition);
        }
        .desktop-nav a:hover {
            background-color: var(--accent-color);
            color: var(--primary-color);
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .mobile-nav {
            display: none;
            background-color: var(--primary-color);
            padding: 20px;
        }
        .mobile-nav.active {
            display: block;
        }
        .mobile-nav ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .mobile-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            display: block;
            padding: 10px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .breadcrumb {
            background-color: var(--light-bg);
            padding: 12px 0;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li {
            margin-right: 10px;
        }
        .breadcrumb li:not(:last-child)::after {
            content: ">";
            margin-left: 10px;
            color: #777;
        }
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        main {
            padding: 40px 0;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        .article-content {
            background-color: white;
            padding: 30px;
            border-radius: 8px;
            box-shadow: var(--shadow);
        }
        .last-updated {
            background-color: #e8f5e9;
            padding: 10px 15px;
            border-left: 4px solid #4caf50;
            margin-bottom: 30px;
            font-size: 0.95rem;
        }
        h1 {
            color: var(--primary-color);
            font-size: 2.5rem;
            margin-bottom: 25px;
            line-height: 1.3;
        }
        h2 {
            color: var(--secondary-color);
            font-size: 1.8rem;
            margin: 35px 0 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--light-bg);
        }
        h3 {
            color: var(--primary-color);
            font-size: 1.5rem;
            margin: 30px 0 15px;
        }
        h4 {
            color: #555;
            font-size: 1.2rem;
            margin: 25px 0 10px;
        }
        p {
            margin-bottom: 20px;
            text-align: justify;
        }
        .intro {
            font-size: 1.2rem;
            color: #444;
            background-color: #f0f7ff;
            padding: 20px;
            border-radius: 8px;
            margin-bottom: 30px;
        }
        .highlight {
            background-color: #fffde7;
            border-left: 5px solid var(--accent-color);
            padding: 20px;
            margin: 25px 0;
        }
        .feature-box {
            background-color: var(--light-bg);
            border-radius: 8px;
            padding: 25px;
            margin: 30px 0;
            border: 1px solid var(--border-color);
        }
        .feature-box h3 {
            margin-top: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
            margin: 25px 0;
            box-shadow: var(--shadow);
            display: block;
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: -15px;
            margin-bottom: 25px;
        }
        strong {
            color: var(--primary-color);
        }
        a {
            color: var(--secondary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-color);
            text-decoration: underline;
        }
        ul, ol {
            margin-left: 25px;
            margin-bottom: 25px;
        }
        li {
            margin-bottom: 8px;
        }
        .internal-links {
            background-color: #f9f9f9;
            padding: 25px;
            border-radius: 8px;
            margin: 30px 0;
        }
        .internal-links h3 {
            margin-top: 0;
        }
        .internal-links ul {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 10px;
        }
        .internal-links li {
            list-style-type: none;
            margin-left: 0;
        }
        .internal-links a {
            display: block;
            padding: 10px 15px;
            background-color: white;
            border-radius: 4px;
            border: 1px solid var(--border-color);
        }
        .internal-links a:hover {
            background-color: var(--primary-color);
            color: white;
            text-decoration: none;
        }
        aside {
            position: sticky;
            top: 120px;
            height: fit-content;
        }
        .sidebar-widget {
            background-color: white;
            border-radius: 8px;
            padding: 25px;
            margin-bottom: 30px;
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            margin-top: 0;
            color: var(--secondary-color);
            font-size: 1.3rem;
        }
        .search-form {
            display: flex;
            margin-top: 15px;
        }
        .search-form input {
            flex: 1;
            padding: 12px 15px;
            border: 1px solid var(--border-color);
            border-right: none;
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }
        .search-form button {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 0 20px;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: var(--primary-color);
        }
        .rating-form {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .stars {
            display: flex;
            gap: 5px;
            direction: rtl;
        }
        .stars input {
            display: none;
        }
        .stars label {
            font-size: 1.8rem;
            color: #ccc;
            cursor: pointer;
            transition: var(--transition);
        }
        .stars label:hover,
        .stars label:hover ~ label,
        .stars input:checked ~ label {
            color: #ffc107;
        }
        .rating-form textarea,
        .comment-form textarea {
            width: 100%;
            padding: 12px;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            font-family: inherit;
            resize: vertical;
            min-height: 100px;
        }
        .rating-form button,
        .comment-form button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 12px 20px;
            border-radius: 4px;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .rating-form button:hover,
        .comment-form button:hover {
            background-color: var(--secondary-color);
        }
        footer {
            background-color: #111;
            color: #aaa;
            padding: 50px 0 20px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-section h3 {
            color: white;
            font-size: 1.3rem;
            margin-bottom: 20px;
        }
        .footer-section ul {
            list-style: none;
            margin-left: 0;
        }
        .footer-section li {
            margin-bottom: 12px;
        }
        .footer-section a {
            color: #aaa;
        }
        .footer-section a:hover {
            color: white;
        }
        friend-link {
            display: block;
            margin: 15px 0;
            padding: 10px;
            background-color: #222;
            border-radius: 4px;
        }
        friend-link a {
            color: var(--accent-color);
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #333;
            font-size: 0.9rem;
            color: #777;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
            aside {
                position: static;
                margin-top: 40px;
            }
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
            .hamburger {
                display: block;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            .header-top {
                padding: 12px 0;
            }
            .article-content {
                padding: 20px;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 15px;
            }
            .internal-links ul {
                grid-template-columns: 1fr;
            }
            .footer-content {
                grid-template-columns: 1fr;
            }
        }
        .accordion {
            margin: 25px 0;
        }
        .accordion-item {
            border: 1px solid var(--border-color);
            border-radius: 4px;
            margin-bottom: 10px;
            overflow: hidden;
        }
        .accordion-header {
            background-color: var(--light-bg);
            padding: 18px 20px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            transition: var(--transition);
        }
        .accordion-header:hover {
            background-color: #e0e0e0;
        }
        .accordion-header i {
            transition: var(--transition);
        }
        .accordion-header.active i {
            transform: rotate(180deg);
        }
        .accordion-content {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }
        .accordion-content p {
            padding: 20px 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin: 30px 0;
        }
        .stat-box {
            background-color: white;
            border-radius: 8px;
            padding: 25px;
            text-align: center;
            box-shadow: var(--shadow);
            border-top: 5px solid var(--secondary-color);
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: bold;
            color: var(--primary-color);
            display: block;
        }
        .stat-label {
            color: #666;
            font-size: 0.9rem;
        }