* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #2c5aa0;
            --secondary-color: #ff9900;
            --accent-color: #34a853;
            --dark-color: #1a1a2e;
            --light-color: #f8f9fa;
            --gray-color: #6c757d;
            --text-color: #333333;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
            --border-radius: 8px;
            --container-width: 1200px;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.7;
            color: var(--text-color);
            background-color: var(--light-color);
            overflow-x: hidden;
        }
        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary-color);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .text-center { text-align: center; }
        .text-bold { font-weight: 700; }
        .highlight { background-color: #fff9c4; padding: 2px 4px; border-radius: 3px; }
        header {
            background-color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary-color);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--secondary-color);
        }
        .desktop-nav {
            display: flex;
            gap: 30px;
        }
        @media (max-width: 992px) {
            .desktop-nav {
                display: none;
            }
        }
        .desktop-nav a {
            font-weight: 600;
            font-size: 1.05rem;
            position: relative;
        }
        .desktop-nav a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 3px;
            background-color: var(--secondary-color);
            transition: var(--transition);
        }
        .desktop-nav a:hover::after {
            width: 100%;
        }
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: var(--primary-color);
            cursor: pointer;
        }
        @media (max-width: 992px) {
            .menu-toggle {
                display: block;
            }
        }
        .mobile-nav {
            position: fixed;
            top: 80px;
            left: 0;
            width: 100%;
            background-color: white;
            box-shadow: var(--shadow);
            padding: 20px;
            transform: translateY(-100%);
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 999;
        }
        .mobile-nav.active {
            transform: translateY(0);
            opacity: 1;
            visibility: visible;
        }
        .mobile-nav a {
            display: block;
            padding: 12px 0;
            border-bottom: 1px solid #eee;
            font-size: 1.1rem;
            font-weight: 600;
        }
        .breadcrumb {
            background-color: #f1f5f9;
            padding: 12px 0;
            font-size: 0.9rem;
            margin-bottom: 30px;
        }
        .breadcrumb a {
            color: var(--gray-color);
        }
        .breadcrumb a:hover {
            color: var(--primary-color);
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            margin: 30px 0;
        }
        @media (max-width: 768px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        article {
            background-color: white;
            padding: 40px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .article-header {
            margin-bottom: 40px;
            border-bottom: 2px solid #eee;
            padding-bottom: 20px;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--dark-color);
            margin-bottom: 15px;
            line-height: 1.2;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--gray-color);
            font-size: 0.9rem;
            margin-top: 20px;
            flex-wrap: wrap;
            gap: 15px;
        }
        .last-updated {
            background-color: #e8f4ff;
            padding: 8px 15px;
            border-radius: 20px;
            font-weight: 600;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary-color);
            margin: 40px 0 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #eaeaea;
        }
        h3 {
            font-size: 1.6rem;
            color: var(--dark-color);
            margin: 30px 0 15px;
        }
        h4 {
            font-size: 1.3rem;
            color: #444;
            margin: 25px 0 12px;
        }
        p {
            margin-bottom: 20px;
            font-size: 1.1rem;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 500;
            color: var(--dark-color);
            background-color: #f0f7ff;
            padding: 25px;
            border-left: 5px solid var(--primary-color);
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            margin-bottom: 30px;
        }
        ul, ol {
            margin-bottom: 20px;
            padding-left: 30px;
        }
        li {
            margin-bottom: 10px;
        }
        .tip-box, .warning-box, .cheat-box {
            padding: 25px;
            border-radius: var(--border-radius);
            margin: 30px 0;
            position: relative;
            padding-left: 70px;
        }
        .tip-box {
            background-color: #e8f6ef;
            border-left: 5px solid var(--accent-color);
        }
        .warning-box {
            background-color: #fff4e6;
            border-left: 5px solid var(--secondary-color);
        }
        .cheat-box {
            background-color: #f0f4ff;
            border-left: 5px solid var(--primary-color);
        }
        .tip-box::before, .warning-box::before, .cheat-box::before {
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            left: 25px;
            top: 25px;
            font-size: 1.8rem;
        }
        .tip-box::before {
            content: '\f05a';
            color: var(--accent-color);
        }
        .warning-box::before {
            content: '\f071';
            color: var(--secondary-color);
        }
        .cheat-box::before {
            content: '\f0e7';
            color: var(--primary-color);
        }
        .featured-image {
            margin: 30px 0;
            text-align: center;
        }
        .featured-image img {
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin: 0 auto 15px;
        }
        .image-caption {
            font-style: italic;
            color: var(--gray-color);
            font-size: 0.95rem;
        }
        .interactive-section {
            background-color: #f9f9f9;
            border-radius: var(--border-radius);
            padding: 30px;
            margin: 40px 0;
            border: 1px solid #e0e0e0;
        }
        .interactive-section h3 {
            margin-top: 0;
        }
        form {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        label {
            font-weight: 600;
            margin-bottom: 8px;
        }
        input, textarea, select {
            padding: 12px 15px;
            border: 1px solid #ccc;
            border-radius: var(--border-radius);
            font-size: 1rem;
            font-family: inherit;
        }
        textarea {
            min-height: 120px;
            resize: vertical;
        }
        .rating {
            display: flex;
            gap: 10px;
            flex-direction: row-reverse;
            justify-content: flex-end;
        }
        .rating input {
            display: none;
        }
        .rating label {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating label:hover,
        .rating label:hover ~ label,
        .rating input:checked ~ label {
            color: var(--secondary-color);
        }
        button, .btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 14px 25px;
            border-radius: var(--border-radius);
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: inline-block;
            text-align: center;
        }
        button:hover, .btn:hover {
            background-color: #1d4a8a;
            transform: translateY(-3px);
            box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
        }
        .btn-secondary {
            background-color: var(--secondary-color);
        }
        .btn-secondary:hover {
            background-color: #e68a00;
        }
        aside {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .sidebar-widget {
            background-color: white;
            padding: 25px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            margin-top: 0;
            margin-bottom: 20px;
            font-size: 1.4rem;
            color: var(--primary-color);
            padding-bottom: 10px;
            border-bottom: 1px solid #eee;
        }
        .quick-links ul {
            list-style: none;
            padding-left: 0;
        }
        .quick-links li {
            margin-bottom: 12px;
            padding-bottom: 12px;
            border-bottom: 1px dashed #eee;
        }
        .quick-links li:last-child {
            margin-bottom: 0;
            padding-bottom: 0;
            border-bottom: none;
        }
        .quick-links a {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .quick-links i {
            color: var(--secondary-color);
        }
        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 50px 0 30px;
            margin-top: 60px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-section h4 {
            color: white;
            margin-bottom: 20px;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
            padding-left: 0;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #ccc;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: rgba(255, 255, 255, 0.1);
            padding: 20px;
            border-radius: var(--border-radius);
            margin: 15px 0;
        }
        friend-link a {
            color: #fff;
            font-weight: 600;
        }
        friend-link a:hover {
            color: var(--secondary-color);
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            article {
                padding: 25px;
            }
            .sidebar-widget {
                padding: 20px;
            }
            .interactive-section {
                padding: 20px;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            h3 {
                font-size: 1.4rem;
            }
        }
        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.02); }
            100% { transform: scale(1); }
        }
        .pulse {
            animation: pulse 2s infinite;
        }