:root {
            --primary: #1a237e;
            --secondary: #ff5722;
            --accent: #4caf50;
            --dark: #121212;
            --light: #f5f5f5;
            --gray: #757575;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 3rem;
            --border-radius: 8px;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: var(--dark);
            background-color: var(--light);
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-sm);
        }
        .site-header {
            background-color: var(--primary);
            color: white;
            padding: var(--spacing-sm) 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-size: 2.2rem;
            font-weight: 900;
            text-transform: uppercase;
            letter-spacing: 2px;
            color: var(--secondary);
            transition: var(--transition);
        }
        .logo:hover {
            transform: scale(1.05);
            color: white;
        }
        .nav-container {
            display: flex;
            align-items: center;
        }
        .main-nav {
            display: flex;
            list-style: none;
        }
        .main-nav li {
            margin-left: var(--spacing-md);
        }
        .main-nav a {
            font-weight: 600;
            padding: var(--spacing-xs) var(--spacing-sm);
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        .main-nav a:hover {
            background-color: var(--secondary);
            color: white;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: white;
        }
        .breadcrumb {
            background-color: #e3f2fd;
            padding: var(--spacing-xs) 0;
            font-size: 0.9rem;
            color: var(--gray);
        }
        .breadcrumb a:hover {
            text-decoration: underline;
            color: var(--primary);
        }
        .main-content {
            padding: var(--spacing-lg) 0;
            display: grid;
            grid-template-columns: 1fr;
            gap: var(--spacing-lg);
        }
        article {
            background-color: white;
            border-radius: var(--border-radius);
            padding: var(--spacing-lg);
            box-shadow: var(--shadow);
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary);
            margin-bottom: var(--spacing-md);
            border-bottom: 4px solid var(--secondary);
            padding-bottom: var(--spacing-sm);
        }
        h2 {
            font-size: 2rem;
            color: var(--primary);
            margin-top: var(--spacing-lg);
            margin-bottom: var(--spacing-sm);
            padding-left: var(--spacing-sm);
            border-left: 5px solid var(--accent);
        }
        h3 {
            font-size: 1.5rem;
            color: var(--secondary);
            margin-top: var(--spacing-md);
            margin-bottom: var(--spacing-sm);
        }
        p {
            margin-bottom: var(--spacing-md);
            text-align: justify;
            font-size: 1.1rem;
        }
        .highlight {
            background-color: #fff3e0;
            padding: var(--spacing-md);
            border-radius: var(--border-radius);
            border-left: 5px solid var(--secondary);
            margin: var(--spacing-md) 0;
            font-weight: bold;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .image-container {
            text-align: center;
            margin: var(--spacing-lg) 0;
        }
        .image-container img {
            max-width: 100%;
            height: auto;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .image-container img:hover {
            transform: scale(1.02);
        }
        .features {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: var(--spacing-md);
            margin: var(--spacing-lg) 0;
        }
        .feature-card {
            background-color: #f1f8e9;
            padding: var(--spacing-md);
            border-radius: var(--border-radius);
            transition: var(--transition);
            border: 2px solid transparent;
        }
        .feature-card:hover {
            border-color: var(--accent);
            transform: translateY(-5px);
        }
        .interaction-forms {
            background-color: #f5f5f5;
            padding: var(--spacing-lg);
            border-radius: var(--border-radius);
            margin-top: var(--spacing-lg);
        }
        .form-group {
            margin-bottom: var(--spacing-md);
        }
        label {
            display: block;
            font-weight: 600;
            margin-bottom: var(--spacing-xs);
            color: var(--primary);
        }
        input, textarea, select {
            width: 100%;
            padding: var(--spacing-sm);
            border: 2px solid #ccc;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            border-color: var(--primary);
            outline: none;
        }
        button {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: var(--spacing-sm) var(--spacing-md);
            border-radius: var(--border-radius);
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        button:hover {
            background-color: var(--secondary);
            transform: translateY(-2px);
        }
        .rating {
            display: flex;
            align-items: center;
            gap: var(--spacing-xs);
        }
        .rating i {
            color: #ffc107;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating i:hover {
            transform: scale(1.2);
        }
        .site-footer {
            background-color: var(--dark);
            color: white;
            padding: var(--spacing-lg) 0;
            margin-top: var(--spacing-lg);
        }
        .longtail-links {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: var(--spacing-sm);
            margin-bottom: var(--spacing-lg);
        }
        .web-link {
            background-color: #333;
            padding: var(--spacing-sm);
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        .web-link:hover {
            background-color: var(--secondary);
            transform: translateX(5px);
        }
        .web-link a {
            color: #bbbbbb;
            font-weight: 500;
        }
        .web-link a:hover {
            color: white;
        }
        .copyright {
            text-align: center;
            padding-top: var(--spacing-md);
            border-top: 1px solid #444;
            font-size: 0.9rem;
            color: #bbbbbb;
        }
        @media (max-width: 768px) {
            .header-content {
                flex-wrap: wrap;
            }
            .main-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                background-color: var(--primary);
                position: absolute;
                top: 100%;
                left: 0;
                padding: var(--spacing-sm);
                box-shadow: var(--shadow);
            }
            .main-nav.active {
                display: flex;
            }
            .main-nav li {
                margin: var(--spacing-xs) 0;
            }
            .hamburger {
                display: block;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            .features {
                grid-template-columns: 1fr;
            }
            .longtail-links {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 480px) {
            .longtail-links {
                grid-template-columns: 1fr;
            }
        }