* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #ff6b00;
            --secondary-color: #2c3e50;
            --accent-color: #e74c3c;
            --text-color: #333;
            --light-bg: #f8f9fa;
            --white: #ffffff;
            --shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: var(--light-bg);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, var(--secondary-color), #34495e);
            color: var(--white);
            padding: 1rem 0;
            box-shadow: var(--shadow);
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .logo {
            font-size: 2rem;
            font-weight: bold;
            color: var(--primary-color);
            text-decoration: none;
        }
        .logo span {
            color: var(--white);
        }
        .search-form {
            display: flex;
            gap: 10px;
        }
        .search-form input {
            padding: 10px;
            border: none;
            border-radius: 5px;
            width: 250px;
        }
        .search-form button {
            background: var(--primary-color);
            color: var(--white);
            border: none;
            padding: 10px 20px;
            border-radius: 5px;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-form button:hover {
            background: #e55a00;
        }
        nav {
            background: var(--white);
            box-shadow: var(--shadow);
        }
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .main-nav {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            text-decoration: none;
            color: var(--secondary-color);
            font-weight: 500;
            padding: 1rem 0;
            transition: color 0.3s;
        }
        .main-nav a:hover {
            color: var(--primary-color);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--secondary-color);
            cursor: pointer;
        }
        .breadcrumb {
            background: var(--white);
            padding: 1rem 0;
            margin-bottom: 2rem;
            box-shadow: var(--shadow);
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            gap: 0.5rem;
        }
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "›";
            margin-left: 0.5rem;
            color: var(--secondary-color);
        }
        .main-content {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 2rem;
            margin: 2rem 0;
        }
        .article-content {
            background: var(--white);
            padding: 2rem;
            border-radius: 10px;
            box-shadow: var(--shadow);
        }
        .article-header {
            margin-bottom: 2rem;
        }
        .article-header h1 {
            color: var(--secondary-color);
            font-size: 2.5rem;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .meta-info {
            display: flex;
            gap: 1rem;
            color: #666;
            font-size: 0.9rem;
        }
        .featured-image {
            width: 100%;
            height: 400px;
            object-fit: cover;
            border-radius: 10px;
            margin: 2rem 0;
        }
        .content-section {
            margin-bottom: 3rem;
        }
        .content-section h2 {
            color: var(--primary-color);
            margin-bottom: 1rem;
            font-size: 1.8rem;
            border-left: 4px solid var(--primary-color);
            padding-left: 1rem;
        }
        .content-section h3 {
            color: var(--secondary-color);
            margin: 1.5rem 0 1rem 0;
            font-size: 1.4rem;
        }
        .content-section p {
            margin-bottom: 1rem;
            text-align: justify;
        }
        .highlight-box {
            background: linear-gradient(135deg, #ffeaa7, #fab1a0);
            padding: 1.5rem;
            border-radius: 10px;
            margin: 1.5rem 0;
            border-left: 5px solid var(--accent-color);
        }
        .step-list {
            list-style: none;
            counter-reset: step-counter;
        }
        .step-list li {
            counter-increment: step-counter;
            margin-bottom: 1.5rem;
            padding-left: 3rem;
            position: relative;
        }
        .step-list li::before {
            content: counter(step-counter);
            background: var(--primary-color);
            color: var(--white);
            width: 2rem;
            height: 2rem;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            position: absolute;
            left: 0;
            top: 0;
            font-weight: bold;
        }
        .sidebar {
            background: var(--white);
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: var(--shadow);
        }
        .sidebar-widget {
            margin-bottom: 2rem;
        }
        .sidebar-widget h3 {
            color: var(--secondary-color);
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--primary-color);
        }
        .quick-links {
            list-style: none;
        }
        .quick-links li {
            margin-bottom: 0.5rem;
        }
        .quick-links a {
            color: var(--text-color);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            transition: color 0.3s;
        }
        .quick-links a:hover {
            color: var(--primary-color);
        }
        .download-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--primary-color);
            color: var(--white);
            padding: 12px 24px;
            text-decoration: none;
            border-radius: 5px;
            font-weight: bold;
            transition: all 0.3s;
            margin: 1rem 0;
        }
        .download-btn:hover {
            background: #e55a00;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(255, 107, 0, 0.3);
        }
        .info-card {
            background: var(--light-bg);
            padding: 1.5rem;
            border-radius: 10px;
            border-left: 4px solid var(--primary-color);
            margin: 1rem 0;
        }
        .comment-section {
            background: var(--white);
            padding: 2rem;
            border-radius: 10px;
            box-shadow: var(--shadow);
            margin-top: 2rem;
        }
        .comment-form, .rating-form {
            display: grid;
            gap: 1rem;
            margin-bottom: 2rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .form-group label {
            font-weight: 500;
            color: var(--secondary-color);
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            padding: 10px;
            border: 1px solid #ddd;
            border-radius: 5px;
            font-family: inherit;
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .submit-btn {
            background: var(--primary-color);
            color: var(--white);
            border: none;
            padding: 12px 30px;
            border-radius: 5px;
            cursor: pointer;
            font-weight: bold;
            transition: background 0.3s;
        }
        .submit-btn:hover {
            background: #e55a00;
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            font-size: 1.5rem;
            color: #ffd700;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            cursor: pointer;
        }
        .footer-links {
            background: var(--secondary-color);
            padding: 2rem 0;
            margin-top: 3rem;
        }
        .web-link {
            background: var(--white);
            margin: 0.5rem 0;
            padding: 1rem;
            border-radius: 5px;
            transition: transform 0.3s;
        }
        .web-link:hover {
            transform: translateX(10px);
        }
        .web-link a {
            color: var(--secondary-color);
            text-decoration: none;
            font-weight: 500;
        }
        .web-link a:hover {
            color: var(--primary-color);
        }
        footer {
            background: #2c3e50;
            color: var(--white);
            text-align: center;
            padding: 2rem 0;
        }
        .footer-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .social-links {
            display: flex;
            gap: 1rem;
        }
        .social-links a {
            color: var(--white);
            font-size: 1.2rem;
            transition: color 0.3s;
        }
        .social-links a:hover {
            color: var(--primary-color);
        }
        @media (max-width: 768px) {
            .header-top {
                flex-direction: column;
                gap: 1rem;
            }
            .search-form input {
                width: 200px;
            }
            .hamburger {
                display: block;
            }
            .main-nav {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--white);
                box-shadow: var(--shadow);
                z-index: 1000;
            }
            .main-nav.active {
                display: flex;
            }
            .main-content {
                grid-template-columns: 1fr;
            }
            .article-header h1 {
                font-size: 2rem;
            }
            .featured-image {
                height: 250px;
            }
            .footer-content {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 10px;
            }
            .article-content {
                padding: 1rem;
            }
            .article-header h1 {
                font-size: 1.5rem;
            }
            .search-form input {
                width: 150px;
            }
        }
        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .fade-in {
            animation: fadeIn 0.6s ease-out;
        }
        @media print {
            .sidebar, .comment-section, .footer-links, nav, .search-form {
                display: none;
            }
            .main-content {
                grid-template-columns: 1fr;
            }
        }