:root {
            --primary-color: #c62828; 
            --secondary-color: #2e7d32; 
            --accent-color: #ff9800; 
            --dark-bg: #1a1a1a;
            --light-bg: #f5f5f5;
            --text-dark: #333;
            --text-light: #f0f0f0;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --border-radius: 8px;
            --transition: all 0.3s ease;
            --max-width: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: var(--text-dark);
            background-color: #fff;
            overflow-x: hidden;
        }
        .header-container {
            background: linear-gradient(135deg, var(--dark-bg) 0%, #2c2c2c 100%);
            color: var(--text-light);
            padding: 1rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary-color);
            text-decoration: none;
            text-transform: uppercase;
            letter-spacing: 2px;
            font-family: 'Georgia', serif;
        }
        .logo a span {
            color: var(--accent-color);
        }
        .desktop-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .desktop-nav a {
            color: var(--text-light);
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 0.5rem 0.8rem;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        .desktop-nav a:hover,
        .desktop-nav a.active {
            background-color: var(--primary-color);
            color: white;
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: var(--text-light);
            font-size: 1.8rem;
            cursor: pointer;
        }
        .mobile-nav {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            background-color: var(--dark-bg);
            flex-direction: column;
            padding: 1rem;
            box-shadow: var(--shadow);
        }
        .mobile-nav.active {
            display: flex;
        }
        .mobile-nav a {
            color: var(--text-light);
            text-decoration: none;
            padding: 1rem;
            border-bottom: 1px solid #444;
            font-weight: 600;
        }
        .mobile-nav a:hover {
            background-color: var(--primary-color);
        }
        .breadcrumb {
            max-width: var(--max-width);
            margin: 1rem auto;
            padding: 0 1.5rem;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb span {
            color: #777;
        }
        .container {
            max-width: var(--max-width);
            margin: 2rem auto;
            padding: 0 1.5rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
        }
        @media (max-width: 992px) {
            .container {
                grid-template-columns: 1fr;
            }
        }
        article {
            background-color: white;
            padding: 2.5rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        article h1 {
            color: var(--primary-color);
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.3;
            border-bottom: 3px solid var(--accent-color);
            padding-bottom: 0.5rem;
        }
        article h2 {
            color: var(--secondary-color);
            font-size: 2rem;
            margin: 2.5rem 0 1.2rem;
            padding-left: 0.5rem;
            border-left: 5px solid var(--primary-color);
        }
        article h3 {
            color: var(--dark-bg);
            font-size: 1.5rem;
            margin: 2rem 0 1rem;
        }
        article p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.1rem;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 600;
            color: var(--primary-color);
            background-color: #ffebee;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            margin-bottom: 2.5rem;
        }
        .highlight-box {
            background: linear-gradient(to right, #e3f2fd, #f3e5f5);
            border-left: 5px solid var(--accent-color);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .strategy-tip {
            background-color: #f1f8e9;
            padding: 1rem;
            border-radius: var(--border-radius);
            margin: 1.5rem 0;
            position: relative;
            padding-left: 3.5rem;
        }
        .strategy-tip i {
            position: absolute;
            left: 1rem;
            top: 1.2rem;
            color: var(--secondary-color);
            font-size: 1.5rem;
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            margin: 2rem 0;
            box-shadow: var(--shadow);
        }
        .data-table th,
        .data-table td {
            padding: 1rem;
            text-align: center;
            border: 1px solid #ddd;
        }
        .data-table th {
            background-color: var(--primary-color);
            color: white;
            font-weight: 700;
        }
        .data-table tr:nth-child(even) {
            background-color: #f9f9f9;
        }
        .data-table tr:hover {
            background-color: #ffebee;
        }
        .feature-img {
            width: 100%;
            height: auto;
            border-radius: var(--border-radius);
            margin: 2rem 0;
            box-shadow: var(--shadow);
            border: 5px solid white;
            outline: 2px solid var(--primary-color);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: -1rem;
            margin-bottom: 2rem;
        }
        emoji {
            font-size: 1.3em;
            margin-right: 0.3rem;
        }
        aside {
            background-color: white;
            padding: 1.8rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .widget {
            margin-bottom: 2.5rem;
        }
        .widget h3 {
            color: var(--primary-color);
            border-bottom: 2px solid var(--accent-color);
            padding-bottom: 0.5rem;
            margin-bottom: 1.2rem;
            font-size: 1.5rem;
        }
        .search-form {
            display: flex;
            margin-bottom: 1.5rem;
        }
        .search-form input {
            flex-grow: 1;
            padding: 0.8rem;
            border: 2px solid #ddd;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
        }
        .search-form button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: #b71c1c;
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            font-size: 2rem;
            color: #ffd700;
            margin: 1rem 0;
            cursor: pointer;
        }
        .stars span {
            transition: var(--transition);
        }
        .stars span:hover,
        .stars span.active {
            transform: scale(1.2);
        }
        .rating-form textarea {
            width: 100%;
            padding: 0.8rem;
            border: 2px solid #ddd;
            border-radius: var(--border-radius);
            margin-top: 1rem;
            font-family: inherit;
            resize: vertical;
            min-height: 100px;
        }
        .rating-form button {
            width: 100%;
            padding: 0.8rem;
            background-color: var(--secondary-color);
            color: white;
            border: none;
            border-radius: var(--border-radius);
            margin-top: 1rem;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .rating-form button:hover {
            background-color: #1b5e20;
        }
        .comment-list {
            max-height: 400px;
            overflow-y: auto;
        }
        .comment {
            border-bottom: 1px solid #eee;
            padding: 1rem 0;
        }
        .comment:last-child {
            border-bottom: none;
        }
        .comment-author {
            font-weight: 700;
            color: var(--primary-color);
        }
        .comment-date {
            font-size: 0.8rem;
            color: #777;
        }
        .comment-text {
            margin-top: 0.5rem;
        }
        .longtail-links {
            background-color: var(--light-bg);
            padding: 3rem 1.5rem;
            margin-top: 3rem;
        }
        .links-container {
            max-width: var(--max-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1.5rem;
        }
        .web-link {
            background-color: white;
            padding: 1.2rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .web-link:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
        }
        .web-link a {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            display: block;
        }
        .web-link a:hover {
            text-decoration: underline;
        }
        footer {
            background-color: var(--dark-bg);
            color: var(--text-light);
            padding: 3rem 1.5rem 1.5rem;
        }
        .footer-content {
            max-width: var(--max-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 2rem;
            padding-bottom: 2rem;
            border-bottom: 1px solid #444;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary-color);
        }
        .copyright {
            max-width: var(--max-width);
            margin: 1.5rem auto 0;
            text-align: center;
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
            .mobile-menu-btn {
                display: block;
            }
            .header-content {
                padding: 0 1rem;
            }
            article {
                padding: 1.8rem;
            }
            article h1 {
                font-size: 2.2rem;
            }
            article h2 {
                font-size: 1.7rem;
            }
            .container {
                padding: 0 1rem;
                gap: 1.5rem;
            }
            aside {
                position: static;
            }
            .footer-content {
                flex-direction: column;
                text-align: center;
            }
        }