* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
            max-width: 100vw;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #1a237e 0%, #283593 100%);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-bottom: 1rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .my-logo {
            font-family: 'Arial Black', sans-serif;
            font-size: 2.2rem;
            font-weight: 900;
            color: #00e5ff;
            text-decoration: none;
            text-transform: uppercase;
            letter-spacing: 1px;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
            transition: all 0.3s ease;
        }
        .my-logo:hover {
            color: #ffffff;
            transform: scale(1.05);
        }
        .my-logo span {
            color: #ffeb3b;
        }
        .search-form {
            display: flex;
            max-width: 400px;
            width: 100%;
        }
        .search-form input {
            flex: 1;
            padding: 0.8rem 1rem;
            border: none;
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
            outline: none;
        }
        .search-form button {
            background: #00e5ff;
            color: #1a237e;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s ease;
        }
        .search-form button:hover {
            background: #00b8d4;
        }
        nav {
            padding-top: 1rem;
        }
        .nav-desktop {
            display: flex;
            justify-content: center;
            gap: 2rem;
            list-style: none;
        }
        .nav-desktop a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .nav-desktop a:hover {
            background: rgba(0, 229, 255, 0.2);
            transform: translateY(-2px);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .nav-mobile {
            display: none;
            list-style: none;
            background: #283593;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            padding: 1rem;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
        }
        .nav-mobile.active {
            display: block;
        }
        .nav-mobile a {
            color: white;
            text-decoration: none;
            display: block;
            padding: 0.8rem 1rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            transition: background 0.3s ease;
        }
        .nav-mobile a:hover {
            background: rgba(0, 229, 255, 0.2);
        }
        .breadcrumb {
            padding: 1rem 0;
            background: #e8eaf6;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "›";
            margin-left: 0.5rem;
            color: #666;
        }
        .breadcrumb a {
            color: #1a237e;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        main {
            padding: 2rem 0;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
        }
        .content {
            background: white;
            border-radius: 8px;
            padding: 2.5rem;
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
        }
        .article-header {
            margin-bottom: 2.5rem;
            padding-bottom: 1.5rem;
            border-bottom: 3px solid #00e5ff;
        }
        .article-header h1 {
            color: #1a237e;
            font-size: 2.8rem;
            line-height: 1.2;
            margin-bottom: 1rem;
        }
        .meta-info {
            display: flex;
            gap: 1.5rem;
            color: #666;
            font-size: 0.9rem;
            align-items: center;
            flex-wrap: wrap;
        }
        .meta-info i {
            color: #00e5ff;
            margin-right: 0.5rem;
        }
        .article-content {
            font-size: 1.1rem;
            line-height: 1.8;
        }
        .article-content h2 {
            color: #283593;
            font-size: 2rem;
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e8eaf6;
        }
        .article-content h3 {
            color: #3949ab;
            font-size: 1.6rem;
            margin: 2rem 0 1rem;
        }
        .article-content h4 {
            color: #5c6bc0;
            font-size: 1.3rem;
            margin: 1.5rem 0 0.8rem;
        }
        .article-content p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .article-content strong {
            color: #1a237e;
            font-weight: 700;
        }
        .highlight-box {
            background: linear-gradient(135deg, #e8eaf6 0%, #f3e5f5 100%);
            border-left: 4px solid #00e5ff;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .featured-image {
            width: 100%;
            height: auto;
            border-radius: 8px;
            margin: 2rem 0;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
            transition: transform 0.3s ease;
        }
        .featured-image:hover {
            transform: scale(1.01);
        }
        .download-section {
            background: linear-gradient(135deg, #1a237e 0%, #283593 100%);
            color: white;
            padding: 2rem;
            border-radius: 8px;
            margin: 2.5rem 0;
            text-align: center;
        }
        .download-btn {
            display: inline-block;
            background: #00e5ff;
            color: #1a237e;
            padding: 1rem 2.5rem;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 700;
            font-size: 1.2rem;
            margin-top: 1rem;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(0, 229, 255, 0.3);
        }
        .download-btn:hover {
            background: #ffffff;
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(0, 229, 255, 0.4);
        }
        .related-links {
            background: #f5f5f5;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
        }
        .related-links h3 {
            color: #1a237e;
            margin-bottom: 1rem;
        }
        .related-links ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 0.8rem;
        }
        .related-links a {
            color: #3949ab;
            text-decoration: none;
            padding: 0.5rem;
            display: block;
            border-radius: 4px;
            transition: all 0.2s ease;
        }
        .related-links a:hover {
            background: rgba(57, 73, 171, 0.1);
            padding-left: 1rem;
        }
        .sidebar {
            position: sticky;
            top: 120px;
            align-self: start;
        }
        .sidebar-widget {
            background: white;
            border-radius: 8px;
            padding: 1.5rem;
            margin-bottom: 1.5rem;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
        }
        .sidebar-widget h3 {
            color: #1a237e;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e8eaf6;
        }
        .user-interaction {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 0.3rem;
            margin: 1rem 0;
        }
        .star {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s ease;
        }
        .star:hover,
        .star.active {
            color: #ffeb3b;
        }
        .comment-form textarea,
        .comment-form input {
            width: 100%;
            padding: 0.8rem;
            margin-bottom: 1rem;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-family: inherit;
        }
        .comment-form button {
            background: #00e5ff;
            color: #1a237e;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 4px;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s ease;
        }
        .comment-form button:hover {
            background: #00b8d4;
        }
        footer {
            background: #1a237e;
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 {
            color: #00e5ff;
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links a {
            color: #e8eaf6;
            text-decoration: none;
            display: block;
            padding: 0.5rem 0;
            transition: color 0.3s ease;
        }
        .footer-links a:hover {
            color: #00e5ff;
            padding-left: 0.5rem;
        }
        friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.1);
            padding: 1.5rem;
            border-radius: 8px;
            margin: 1.5rem 0;
        }
        friend-link h4 {
            color: #00e5ff;
            margin-bottom: 1rem;
        }
        friend-link a {
            color: #ffffff;
            text-decoration: none;
            display: inline-block;
            margin-right: 1rem;
            margin-bottom: 0.5rem;
            padding: 0.3rem 0.8rem;
            background: rgba(0, 229, 255, 0.2);
            border-radius: 4px;
            transition: all 0.3s ease;
        }
        friend-link a:hover {
            background: rgba(0, 229, 255, 0.4);
            transform: translateY(-2px);
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
            color: #b0b0b0;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                display: grid;
                grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
                gap: 1.5rem;
            }
            .article-header h1 {
                font-size: 2.3rem;
            }
        }
        @media (max-width: 768px) {
            .header-top {
                flex-direction: column;
                gap: 1rem;
                text-align: center;
            }
            .search-form {
                max-width: 100%;
            }
            .nav-desktop {
                display: none;
            }
            .hamburger {
                display: block;
                position: absolute;
                right: 20px;
                top: 1.5rem;
            }
            .article-header h1 {
                font-size: 1.8rem;
            }
            .content {
                padding: 1.5rem;
            }
            .footer-content {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 15px;
            }
            .my-logo {
                font-size: 1.8rem;
            }
            .download-btn {
                padding: 0.8rem 1.8rem;
                font-size: 1.1rem;
            }
            .meta-info {
                flex-direction: column;
                align-items: flex-start;
                gap: 0.5rem;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .content, .sidebar-widget {
            animation: fadeIn 0.5s ease-out;
        }
        @media print {
            header, .sidebar, footer, .download-section, .user-interaction {
                display: none;
            }
            .content {
                box-shadow: none;
                padding: 0;
            }
            body {
                background: white;
                color: black;
                font-size: 12pt;
            }
            a {
                color: black;
                text-decoration: underline;
            }
        }