:root {
            --primary: #2c3e50;
            --secondary: #e74c3c;
            --accent: #3498db;
            --light: #ecf0f1;
            --dark: #2c3e50;
            --success: #27ae60;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #f9f9f9;
            color: #333;
            line-height: 1.7;
            overflow-x: hidden;
        }
        .header-container {
            background: var(--primary);
            color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 5%;
            max-width: 1400px;
            margin: 0 auto;
        }
        .logo a {
            color: white;
            text-decoration: none;
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo span {
            color: var(--accent);
        }
        .search-form {
            display: flex;
            width: 40%;
            max-width: 500px;
        }
        .search-form input {
            flex-grow: 1;
            padding: 0.8rem 1rem;
            border: none;
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }
        .search-form button {
            background: var(--secondary);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background: #c0392b;
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .nav-desktop {
            display: flex;
            background: rgba(0, 0, 0, 0.1);
            padding: 0 5%;
            justify-content: center;
        }
        .nav-desktop a {
            color: white;
            text-decoration: none;
            padding: 1rem 1.5rem;
            transition: var(--transition);
            font-weight: 500;
        }
        .nav-desktop a:hover {
            background: var(--accent);
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background: var(--dark);
            padding: 1rem;
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            color: white;
            text-decoration: none;
            padding: 0.8rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .breadcrumb {
            padding: 0.8rem 5%;
            background: #eee;
            font-size: 0.9rem;
            max-width: 1400px;
            margin: 0 auto;
        }
        .breadcrumb a {
            color: var(--accent);
            text-decoration: none;
        }
        .container {
            max-width: 1400px;
            margin: 2rem auto;
            padding: 0 5%;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        @media (max-width: 992px) {
            .container {
                grid-template-columns: 1fr;
            }
        }
        .main-content h1 {
            color: var(--primary);
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        .main-content h2 {
            color: var(--secondary);
            font-size: 2rem;
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #eee;
        }
        .main-content h3 {
            color: var(--primary);
            font-size: 1.5rem;
            margin: 2rem 0 1rem;
        }
        .main-content p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.1rem;
        }
        .highlight {
            background: #fffacd;
            padding: 2rem;
            border-left: 5px solid var(--accent);
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .stat-card {
            background: white;
            padding: 1.5rem;
            border-radius: 8px;
            box-shadow: var(--shadow);
            text-align: center;
            transition: var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-5px);
        }
        .stat-card i {
            font-size: 2.5rem;
            color: var(--accent);
            margin-bottom: 1rem;
        }
        .feature-image {
            width: 100%;
            height: auto;
            border-radius: 10px;
            box-shadow: var(--shadow);
            margin: 2rem 0;
            transition: var(--transition);
        }
        .feature-image:hover {
            transform: scale(1.01);
        }
        .interactive-demo {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: var(--shadow);
            margin: 3rem 0;
        }
        .sidebar-widget {
            background: white;
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: var(--shadow);
            margin-bottom: 2rem;
        }
        .sidebar-widget h3 {
            color: var(--secondary);
            margin-bottom: 1rem;
            font-size: 1.3rem;
        }
        .rating-widget form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            margin: 1rem 0;
        }
        .stars .active {
            color: gold;
        }
        .comment-form textarea {
            width: 100%;
            padding: 1rem;
            border: 1px solid #ccc;
            border-radius: 6px;
            resize: vertical;
            min-height: 120px;
            margin-bottom: 1rem;
        }
        .btn {
            background: var(--accent);
            color: white;
            border: none;
            padding: 0.8rem 1.8rem;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            display: inline-block;
            text-align: center;
            text-decoration: none;
        }
        .btn:hover {
            background: #2980b9;
            transform: translateY(-2px);
        }
        .long-tail-links {
            background: var(--light);
            padding: 3rem 5%;
            margin-top: 4rem;
        }
        .links-container {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1.5rem;
        }
        .web-link {
            background: white;
            padding: 1.2rem;
            border-radius: 6px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.05);
        }
        .web-link a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
        }
        .web-link a:hover {
            color: var(--secondary);
            padding-left: 5px;
        }
        footer {
            background: var(--primary);
            color: white;
            padding: 3rem 5% 1.5rem;
            text-align: center;
        }
        .footer-content {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 2rem;
        }
        .copyright {
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            width: 100%;
            font-size: 0.9rem;
            color: #bbb;
        }
        @media (max-width: 768px) {
            .header-top {
                flex-wrap: wrap;
            }
            .search-form {
                order: 3;
                width: 100%;
                margin-top: 1rem;
                max-width: 100%;
            }
            .hamburger {
                display: block;
            }
            .nav-desktop {
                display: none;
            }
            .main-content h1 {
                font-size: 2.2rem;
            }
            .main-content h2 {
                font-size: 1.8rem;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
        }