:root {
            --primary-color: #1a6dbc;
            --secondary-color: #ffcc00;
            --dark-bg: #0c1c2c;
            --light-bg: #f0f4f8;
            --text-dark: #222;
            --text-light: #e6e6e6;
            --accent: #c41f3b;
            --spacing-sm: 0.5rem;
            --spacing-md: 1rem;
            --spacing-lg: 2rem;
            --spacing-xl: 4rem;
            --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;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: var(--light-bg);
            background-image: linear-gradient(to bottom, #eef2f7, #ffffff 10%);
            max-width: 100vw;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }
        .site-header {
            background-color: var(--dark-bg);
            color: var(--text-light);
            padding: var(--spacing-md) 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--secondary-color);
            text-transform: uppercase;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo a:hover {
            color: #fff;
            transform: scale(1.02);
        }
        .logo i {
            color: var(--primary-color);
        }
        .breadcrumb {
            padding: var(--spacing-sm) 0;
            background-color: rgba(255, 255, 255, 0.05);
            margin-top: var(--spacing-sm);
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin: 0 8px;
            color: #aaa;
        }
        .breadcrumb a:hover {
            color: var(--secondary-color);
            text-decoration: underline;
        }
        .main-nav {
            display: flex;
            gap: var(--spacing-lg);
        }
        .main-nav a {
            padding: var(--spacing-sm) var(--spacing-md);
            border-radius: var(--border-radius);
            font-weight: 600;
        }
        .main-nav a:hover {
            background-color: rgba(255, 255, 255, 0.1);
            color: var(--secondary-color);
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--secondary-color);
        }
        .search-container {
            margin: var(--spacing-md) 0 var(--spacing-lg);
            padding: var(--spacing-md);
            background: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-form input {
            flex: 1;
            padding: 12px 16px;
            border: 2px solid #ddd;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
            outline: none;
        }
        .search-form input:focus {
            border-color: var(--primary-color);
        }
        .search-form button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 24px;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: #145599;
        }
        main {
            padding: var(--spacing-lg) 0;
        }
        article {
            background: white;
            padding: var(--spacing-xl);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin-bottom: var(--spacing-xl);
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-color);
            margin-bottom: var(--spacing-md);
            line-height: 1.2;
        }
        h2 {
            font-size: 2rem;
            color: var(--dark-bg);
            margin: var(--spacing-xl) 0 var(--spacing-md);
            padding-bottom: 8px;
            border-bottom: 3px solid var(--secondary-color);
        }
        h3 {
            font-size: 1.5rem;
            color: var(--accent);
            margin: var(--spacing-lg) 0 var(--spacing-md);
        }
        p {
            margin-bottom: var(--spacing-md);
            text-align: justify;
            hyphens: auto;
        }
        strong {
            color: var(--primary-color);
            font-weight: 700;
        }
        .intro {
            font-size: 1.2rem;
            background: linear-gradient(135deg, #f0f8ff, #e6f2ff);
            padding: var(--spacing-lg);
            border-left: 5px solid var(--primary-color);
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            margin-bottom: var(--spacing-xl);
        }
        .image-container {
            margin: var(--spacing-lg) auto;
            text-align: center;
            max-width: 800px;
        }
        .image-container img {
            max-width: 100%;
            height: auto;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            transition: transform 0.5s ease;
        }
        .image-container img:hover {
            transform: scale(1.01);
        }
        .caption {
            font-style: italic;
            color: #666;
            margin-top: 8px;
            font-size: 0.9rem;
        }
        .highlight-box {
            background: linear-gradient(135deg, #fff9e6, #ffe680);
            border: 2px dashed var(--secondary-color);
            padding: var(--spacing-lg);
            border-radius: var(--border-radius);
            margin: var(--spacing-lg) 0;
        }
        .download-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: var(--spacing-md);
            margin: var(--spacing-lg) 0;
        }
        .step {
            background: #f8f9fa;
            padding: var(--spacing-lg);
            border-radius: var(--border-radius);
            border-top: 4px solid var(--primary-color);
            transition: var(--transition);
        }
        .step:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .step-number {
            display: inline-block;
            background: var(--primary-color);
            color: white;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            text-align: center;
            line-height: 36px;
            font-weight: bold;
            margin-bottom: var(--spacing-md);
        }
        .interactive-section {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-lg);
            margin: var(--spacing-xl) 0;
        }
        .comments, .rating {
            flex: 1;
            min-width: 300px;
            background: #f8f9fa;
            padding: var(--spacing-lg);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }
        .star-rating {
            display: flex;
            gap: 5px;
            direction: rtl;
            font-size: 1.8rem;
            margin: 10px 0;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star-rating label:hover,
        .star-rating label:hover ~ label,
        .star-rating input:checked ~ label {
            color: #ffcc00;
        }
        textarea, input[type="text"], input[type="email"] {
            width: 100%;
            padding: 12px;
            border: 1px solid #ccc;
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
        }
        textarea {
            min-height: 120px;
            resize: vertical;
        }
        .btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 12px 24px;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            align-self: flex-start;
        }
        .btn:hover {
            background-color: #145599;
            transform: translateY(-2px);
        }
        .footer-links {
            background: var(--dark-bg);
            padding: var(--spacing-xl) 0;
            margin-top: var(--spacing-xl);
        }
        .web-links-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: var(--spacing-md);
        }
        .web-link {
            background: rgba(255, 255, 255, 0.05);
            padding: var(--spacing-md);
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        .web-link:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateX(5px);
        }
        .web-link a {
            color: var(--text-light);
            display: block;
        }
        .web-link a:hover {
            color: var(--secondary-color);
        }
        .site-footer {
            background: #080f1a;
            color: var(--text-light);
            padding: var(--spacing-xl) 0;
            text-align: center;
        }
        .footer-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: var(--spacing-md);
        }
        .copyright {
            font-size: 0.9rem;
            color: #aaa;
            margin-top: var(--spacing-md);
        }
        .social-links {
            display: flex;
            gap: var(--spacing-lg);
            font-size: 1.5rem;
            margin: var(--spacing-md) 0;
        }
        .social-links a:hover {
            color: var(--secondary-color);
            transform: scale(1.2);
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            .hamburger {
                display: block;
            }
            .main-nav {
                position: fixed;
                top: 80px;
                left: 0;
                background: var(--dark-bg);
                width: 100%;
                flex-direction: column;
                padding: var(--spacing-lg);
                clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
                transition: clip-path 0.4s ease;
                box-shadow: var(--shadow);
            }
            .main-nav.active {
                clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
            }
            article {
                padding: var(--spacing-md);
            }
            .intro {
                padding: var(--spacing-md);
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        article, .interactive-section, .footer-links {
            animation: fadeIn 0.8s ease-out;
        }
        @media print {
            .site-header, .search-container, .interactive-section, .footer-links, .site-footer {
                display: none;
            }
            body {
                background: white;
                color: black;
            }
        }