* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #FF6B00;
            --secondary-color: #00A8FF;
            --accent-color: #FFD300;
            --text-color: #333333;
            --light-bg: #F8F9FA;
            --dark-bg: #2C3E50;
            --white: #FFFFFF;
            --shadow: 0 4px 6px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: var(--light-bg);
        }
        header {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: var(--white);
            padding: 1rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-size: 2rem;
            font-weight: bold;
            text-decoration: none;
            color: var(--white);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .logo:hover {
            color: var(--accent-color);
            transform: scale(1.05);
            transition: var(--transition);
        }
        .logo i {
            color: var(--accent-color);
        }
        nav {
            display: flex;
            align-items: center;
            gap: 2rem;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .nav-links a {
            color: var(--white);
            text-decoration: none;
            font-weight: 500;
            padding: 0.5rem 1rem;
            border-radius: 5px;
            transition: var(--transition);
        }
        .nav-links a:hover {
            background-color: rgba(255,255,255,0.2);
            transform: translateY(-2px);
        }
        .search-box {
            display: flex;
            background: var(--white);
            border-radius: 25px;
            padding: 0.5rem;
        }
        .search-box input {
            border: none;
            outline: none;
            padding: 0.5rem 1rem;
            border-radius: 25px;
            width: 200px;
        }
        .search-box button {
            background: var(--primary-color);
            border: none;
            color: var(--white);
            padding: 0.5rem 1rem;
            border-radius: 25px;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-box button:hover {
            background: var(--secondary-color);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: var(--white);
            font-size: 1.5rem;
            cursor: pointer;
        }
        .breadcrumb {
            max-width: 1200px;
            margin: 1rem auto;
            padding: 0 2rem;
        }
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        main {
            max-width: 1200px;
            margin: 2rem auto;
            padding: 0 2rem;
        }
        .article-header {
            text-align: center;
            margin-bottom: 3rem;
            padding: 2rem;
            background: var(--white);
            border-radius: 15px;
            box-shadow: var(--shadow);
        }
        .article-header h1 {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        .article-meta {
            display: flex;
            justify-content: center;
            gap: 2rem;
            color: #666;
            font-size: 0.9rem;
        }
        .content-section {
            background: var(--white);
            padding: 2rem;
            margin-bottom: 2rem;
            border-radius: 15px;
            box-shadow: var(--shadow);
        }
        .content-section h2 {
            color: var(--secondary-color);
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid var(--accent-color);
        }
        .content-section h3 {
            color: var(--primary-color);
            margin: 1.5rem 0 1rem 0;
        }
        .download-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .download-card {
            background: var(--light-bg);
            padding: 1.5rem;
            border-radius: 10px;
            text-align: center;
            transition: var(--transition);
            border: 2px solid transparent;
        }
        .download-card:hover {
            transform: translateY(-5px);
            border-color: var(--primary-color);
            box-shadow: var(--shadow);
        }
        .download-card i {
            font-size: 3rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        .download-btn {
            display: inline-block;
            background: var(--primary-color);
            color: var(--white);
            padding: 0.75rem 1.5rem;
            border-radius: 25px;
            text-decoration: none;
            margin-top: 1rem;
            transition: var(--transition);
        }
        .download-btn:hover {
            background: var(--secondary-color);
            transform: scale(1.05);
        }
        .feature-image {
            width: 100%;
            max-width: 600px;
            height: auto;
            border-radius: 10px;
            margin: 2rem auto;
            display: block;
            box-shadow: var(--shadow);
        }
        .interactive-section {
            background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
            color: var(--white);
            padding: 3rem 2rem;
            border-radius: 15px;
            text-align: center;
            margin: 3rem 0;
        }
        .rating-system {
            display: flex;
            justify-content: center;
            gap: 1rem;
            margin: 2rem 0;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: var(--accent-color);
            transform: scale(1.2);
        }
        .comment-form {
            background: var(--light-bg);
            padding: 2rem;
            border-radius: 10px;
            margin-top: 2rem;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: bold;
        }
        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 0.75rem;
            border: 2px solid #ddd;
            border-radius: 5px;
            transition: var(--transition);
        }
        .form-group input:focus,
        .form-group textarea:focus {
            border-color: var(--primary-color);
            outline: none;
        }
        .submit-btn {
            background: var(--primary-color);
            color: var(--white);
            padding: 1rem 2rem;
            border: none;
            border-radius: 25px;
            cursor: pointer;
            font-size: 1rem;
            transition: var(--transition);
        }
        .submit-btn:hover {
            background: var(--secondary-color);
            transform: scale(1.05);
        }
        .web-links {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1rem;
            margin: 3rem 0;
        }
        .web-link {
            background: var(--white);
            padding: 1rem;
            border-radius: 8px;
            text-align: center;
            transition: var(--transition);
        }
        .web-link:hover {
            background: var(--primary-color);
            color: var(--white);
            transform: translateY(-3px);
        }
        .web-link a {
            color: inherit;
            text-decoration: none;
            font-weight: 500;
        }
        footer {
            background: var(--dark-bg);
            color: var(--white);
            padding: 3rem 0 1rem 0;
        }
        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-section h3 {
            color: var(--accent-color);
            margin-bottom: 1rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.5rem;
        }
        .footer-links a {
            color: var(--white);
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent-color);
            padding-left: 5px;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.1);
        }
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
            }
            .nav-links {
                display: none;
                width: 100%;
                flex-direction: column;
                gap: 0;
                margin-top: 1rem;
            }
            .nav-links.active {
                display: flex;
            }
            .nav-links li {
                width: 100%;
                text-align: center;
            }
            .nav-links a {
                display: block;
                padding: 1rem;
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
            .search-box {
                margin-top: 1rem;
                width: 100%;
            }
            .search-box input {
                width: 100%;
            }
            .article-header h1 {
                font-size: 2rem;
            }
            .download-grid {
                grid-template-columns: 1fr;
            }
            .rating-system {
                flex-wrap: wrap;
            }
            .web-links {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .header-container,
            main,
            .breadcrumb,
            .footer-content {
                padding: 0 1rem;
            }
            .article-header {
                padding: 1rem;
            }
            .content-section {
                padding: 1rem;
            }
            .interactive-section {
                padding: 2rem 1rem;
            }
        }
        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .fade-in {
            animation: fadeIn 0.6s ease-out;
        }
        .text-center {
            text-align: center;
        }
        .text-primary {
            color: var(--primary-color);
        }
        .text-secondary {
            color: var(--secondary-color);
        }
        .mb-2 {
            margin-bottom: 2rem;
        }
        .mt-2 {
            margin-top: 2rem;
        }
        .highlight {
            background: linear-gradient(120deg, var(--accent-color) 0%, var(--accent-color) 100%);
            background-repeat: no-repeat;
            background-size: 100% 0.2em;
            background-position: 0 88%;
            transition: background-size 0.25s ease-in;
        }
        .highlight:hover {
            background-size: 100% 88%;
        }