* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary-color: #c62828;
            --secondary-color: #1a237e;
            --accent-color: #ff9800;
            --light-color: #f5f5f5;
            --dark-color: #212121;
            --text-color: #333;
            --text-light: #666;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --border-radius: 8px;
            --transition: all 0.3s ease;
        }
        body {
            background-color: #f9f9f9;
            color: var(--text-color);
            line-height: 1.7;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, var(--secondary-color), var(--dark-color));
            color: white;
            padding: 1rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            color: white;
            text-decoration: none;
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
        }
        .logo-icon {
            color: var(--accent-color);
            margin-right: 10px;
            font-size: 2rem;
        }
        nav ul {
            display: flex;
            list-style: none;
        }
        nav ul li {
            margin-left: 2rem;
        }
        nav ul li a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            transition: var(--transition);
            padding: 5px 10px;
            border-radius: 4px;
        }
        nav ul li a:hover {
            background-color: rgba(255, 255, 255, 0.1);
            color: var(--accent-color);
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: var(--light-color);
            padding: 1rem 0;
            margin-bottom: 2rem;
            border-bottom: 1px solid #ddd;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li {
            margin-right: 0.5rem;
            display: flex;
            align-items: center;
        }
        .breadcrumb li:not(:last-child):after {
            content: '>';
            margin-left: 0.5rem;
            color: var(--text-light);
        }
        .breadcrumb a {
            color: var(--secondary-color);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        main {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
            margin: 2rem 0;
        }
        .content-area {
            background-color: white;
            padding: 2.5rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        aside {
            background-color: white;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        h1, h2, h3, h4 {
            color: var(--secondary-color);
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        h1 {
            font-size: 2.5rem;
            color: var(--primary-color);
            border-bottom: 3px solid var(--accent-color);
            padding-bottom: 0.5rem;
            margin-bottom: 1.5rem;
        }
        h2 {
            font-size: 1.8rem;
            margin-top: 2rem;
            padding-left: 10px;
            border-left: 5px solid var(--accent-color);
        }
        h3 {
            font-size: 1.4rem;
            margin-top: 1.5rem;
            color: var(--dark-color);
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--primary-color);
            background-color: rgba(198, 40, 40, 0.05);
            padding: 1rem;
            border-radius: var(--border-radius);
            border-left: 4px solid var(--primary-color);
            margin-bottom: 2rem;
        }
        .highlight {
            background-color: #fff8e1;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            border: 1px solid #ffecb3;
            margin: 1.5rem 0;
        }
        .tip-box {
            background-color: #e8f5e9;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            border-left: 5px solid #4caf50;
            margin: 1.5rem 0;
        }
        .warning-box {
            background-color: #ffebee;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            border-left: 5px solid #f44336;
            margin: 1.5rem 0;
        }
        ul, ol {
            margin-left: 1.5rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        .article-image {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: var(--border-radius);
            margin: 2rem auto;
            display: block;
            box-shadow: var(--shadow);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--text-light);
            margin-top: 0.5rem;
            margin-bottom: 2rem;
        }
        .search-box {
            background-color: var(--light-color);
            padding: 1.5rem;
            border-radius: var(--border-radius);
            margin-bottom: 2rem;
        }
        .search-form {
            display: flex;
        }
        .search-form input {
            flex: 1;
            padding: 12px 15px;
            border: 2px solid #ddd;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
            outline: none;
            transition: var(--transition);
        }
        .search-form input:focus {
            border-color: var(--secondary-color);
        }
        .search-form button {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 0 20px;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            transition: var(--transition);
            font-size: 1rem;
        }
        .search-form button:hover {
            background-color: var(--primary-color);
        }
        .rating-section, .comment-section {
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 2px solid #eee;
        }
        .rating-form, .comment-form {
            background-color: var(--light-color);
            padding: 1.5rem;
            border-radius: var(--border-radius);
            margin-top: 1rem;
        }
        .stars {
            display: flex;
            margin-bottom: 1rem;
        }
        .stars input {
            display: none;
        }
        .stars label {
            font-size: 1.5rem;
            color: #ddd;
            cursor: pointer;
            margin-right: 5px;
            transition: var(--transition);
        }
        .stars label:hover,
        .stars input:checked ~ label {
            color: #ffc107;
        }
        .form-group {
            margin-bottom: 1rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 15px;
            border: 2px solid #ddd;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: var(--secondary-color);
            outline: none;
        }
        .form-group textarea {
            min-height: 150px;
            resize: vertical;
        }
        .btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            transition: var(--transition);
            display: inline-block;
            text-decoration: none;
        }
        .btn:hover {
            background-color: var(--secondary-color);
            transform: translateY(-3px);
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
        }
        .sidebar-widget {
            margin-bottom: 2rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid #eee;
        }
        .sidebar-widget:last-child {
            border-bottom: none;
        }
        .sidebar-widget h3 {
            font-size: 1.3rem;
            margin-bottom: 1rem;
            color: var(--primary-color);
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #eee;
        }
        .code-list {
            list-style: none;
            margin-left: 0;
        }
        .code-list li {
            background-color: #f5f5f5;
            padding: 12px 15px;
            margin-bottom: 10px;
            border-radius: var(--border-radius);
            border-left: 4px solid var(--accent-color);
            font-family: monospace;
            font-size: 1.1rem;
            word-break: break-all;
        }
        .longtail-links {
            background-color: var(--dark-color);
            color: white;
            padding: 2.5rem 0;
            margin-top: 3rem;
        }
        .web-link {
            display: inline-block;
            margin: 0.5rem 1rem;
        }
        .web-link a {
            color: #bbbbbb;
            text-decoration: none;
            transition: var(--transition);
        }
        .web-link a:hover {
            color: white;
            text-decoration: underline;
        }
        footer {
            background-color: var(--secondary-color);
            color: white;
            padding: 2rem 0;
            text-align: center;
        }
        .footer-container {
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        .social-links {
            margin-bottom: 1.5rem;
        }
        .social-links a {
            color: white;
            font-size: 1.5rem;
            margin: 0 10px;
            transition: var(--transition);
        }
        .social-links a:hover {
            color: var(--accent-color);
            transform: translateY(-5px);
        }
        .copyright {
            font-size: 0.9rem;
            opacity: 0.8;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
            aside {
                position: static;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
        }
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            nav {
                width: 100%;
                margin-top: 1rem;
                display: none;
            }
            nav.active {
                display: block;
            }
            nav ul {
                flex-direction: column;
                background-color: rgba(26, 35, 126, 0.95);
                border-radius: var(--border-radius);
                padding: 1rem;
            }
            nav ul li {
                margin: 0;
                margin-bottom: 0.8rem;
            }
            .hamburger {
                display: block;
            }
            .content-area {
                padding: 1.5rem;
            }
            .breadcrumb {
                font-size: 0.9rem;
            }
            .web-link {
                display: block;
                margin: 0.5rem 0;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 15px;
            }
            h1 {
                font-size: 1.7rem;
            }
            .lead {
                font-size: 1rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form input {
                border-radius: var(--border-radius);
                margin-bottom: 10px;
            }
            .search-form button {
                border-radius: var(--border-radius);
                padding: 12px;
            }
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .keyword {
            background-color: #e3f2fd;
            color: var(--secondary-color);
            padding: 2px 6px;
            border-radius: 4px;
            font-weight: 600;
        }
        .important {
            font-weight: 700;
            color: var(--primary-color);
        }
        .step-number {
            display: inline-block;
            background-color: var(--primary-color);
            color: white;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            text-align: center;
            line-height: 30px;
            margin-right: 10px;
            font-weight: bold;
        }