* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #1a73e8;
            --secondary-color: #ea4335;
            --accent-color: #34a853;
            --dark-bg: #202124;
            --light-bg: #f8f9fa;
            --text-primary: #202124;
            --text-secondary: #5f6368;
            --border-color: #dadce0;
            --shadow: 0 2px 10px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
            --max-width: 1200px;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            line-height: 1.6;
            color: var(--text-primary);
            background-color: var(--light-bg);
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-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: 15px 0;
            border-bottom: 1px solid var(--border-color);
        }
        .logo {
            font-size: 28px;
            font-weight: 800;
            color: var(--primary-color);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: var(--secondary-color);
        }
        .logo span {
            background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .search-form {
            display: flex;
            max-width: 500px;
            flex-grow: 1;
            margin: 0 30px;
        }
        .search-form input {
            flex-grow: 1;
            padding: 12px 20px;
            border: 2px solid var(--border-color);
            border-radius: 30px 0 0 30px;
            font-size: 16px;
            transition: var(--transition);
        }
        .search-form input:focus {
            outline: none;
            border-color: var(--primary-color);
        }
        .search-form button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 25px;
            border-radius: 0 30px 30px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: #0d62d9;
        }
        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--text-primary);
            cursor: pointer;
            padding: 5px;
        }
        nav {
            padding: 15px 0;
        }
        .nav-menu {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        .nav-menu a {
            text-decoration: none;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 16px;
            padding: 8px 0;
            position: relative;
            transition: var(--transition);
        }
        .nav-menu a:hover {
            color: var(--primary-color);
        }
        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary-color);
            transition: var(--transition);
        }
        .nav-menu a:hover::after {
            width: 100%;
        }
        .breadcrumb {
            padding: 15px 0;
            background-color: #f1f3f4;
            font-size: 14px;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 10px;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
        }
        .breadcrumb a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--primary-color);
        }
        .breadcrumb li:not(:last-child)::after {
            content: '/';
            margin-left: 10px;
            color: var(--text-secondary);
        }
        main {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 40px 0;
        }
        .article-content {
            background-color: white;
            border-radius: 10px;
            padding: 40px;
            box-shadow: var(--shadow);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .sidebar-widget {
            background-color: white;
            border-radius: 10px;
            padding: 25px;
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--primary-color);
            color: var(--text-primary);
        }
        .article-header {
            margin-bottom: 40px;
            text-align: center;
        }
        .article-header h1 {
            font-size: 36px;
            line-height: 1.3;
            margin-bottom: 20px;
            color: var(--text-primary);
        }
        .article-meta {
            display: flex;
            justify-content: center;
            gap: 20px;
            color: var(--text-secondary);
            font-size: 14px;
            margin-bottom: 20px;
        }
        .featured-image {
            width: 100%;
            height: auto;
            border-radius: 10px;
            margin: 30px 0;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .content-section {
            margin-bottom: 40px;
        }
        .content-section h2 {
            font-size: 28px;
            margin: 30px 0 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--border-color);
            color: var(--text-primary);
        }
        .content-section h3 {
            font-size: 22px;
            margin: 25px 0 15px;
            color: var(--text-primary);
        }
        .content-section p {
            margin-bottom: 20px;
            font-size: 17px;
            line-height: 1.7;
            color: var(--text-secondary);
        }
        .content-section ul, .content-section ol {
            margin: 20px 0;
            padding-left: 30px;
        }
        .content-section li {
            margin-bottom: 10px;
            color: var(--text-secondary);
        }
        .highlight-box {
            background-color: #e8f0fe;
            border-left: 4px solid var(--primary-color);
            padding: 25px;
            margin: 30px 0;
            border-radius: 0 10px 10px 0;
        }
        .download-steps {
            background-color: #f6f9fc;
            border-radius: 10px;
            padding: 30px;
            margin: 30px 0;
        }
        .step {
            display: flex;
            gap: 20px;
            margin-bottom: 25px;
            padding-bottom: 25px;
            border-bottom: 1px solid var(--border-color);
        }
        .step:last-child {
            margin-bottom: 0;
            padding-bottom: 0;
            border-bottom: none;
        }
        .step-number {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            background-color: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 18px;
        }
        .comments-section {
            margin-top: 50px;
            padding-top: 40px;
            border-top: 2px solid var(--border-color);
        }
        .comment-form, .rating-form {
            background-color: #f8f9fa;
            padding: 30px;
            border-radius: 10px;
            margin-bottom: 40px;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--text-primary);
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid var(--border-color);
            border-radius: 5px;
            font-size: 16px;
            transition: var(--transition);
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 2px rgba(26, 115, 232, 0.2);
        }
        .rating-stars {
            display: flex;
            gap: 10px;
            margin: 10px 0;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            font-size: 28px;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-stars label:hover,
        .rating-stars label:hover ~ label {
            color: #ffc107;
        }
        .rating-stars input:checked ~ label {
            color: #ffc107;
        }
        .submit-btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 14px 30px;
            border-radius: 5px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .submit-btn:hover {
            background-color: #0d62d9;
            transform: translateY(-2px);
        }
        .footer-links {
            background-color: var(--dark-bg);
            padding: 50px 0;
            margin-top: 50px;
        }
        .web-links-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 20px;
            margin-bottom: 40px;
        }
        .web-link {
            background-color: rgba(255,255,255,0.05);
            padding: 15px;
            border-radius: 5px;
            transition: var(--transition);
        }
        .web-link:hover {
            background-color: rgba(255,255,255,0.1);
            transform: translateY(-3px);
        }
        .web-link a {
            color: #e8eaed;
            text-decoration: none;
            font-size: 15px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .web-link a:hover {
            color: white;
        }
        footer {
            background-color: #171717;
            color: #9aa0a6;
            padding: 40px 0;
            text-align: center;
        }
        .footer-content {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 20px;
        }
        .footer-links-list {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 25px;
            margin: 20px 0;
        }
        .footer-links-list a {
            color: #9aa0a6;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links-list a:hover {
            color: white;
        }
        .copyright {
            font-size: 14px;
            margin-top: 20px;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.1);
            width: 100%;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
            .article-header h1 {
                font-size: 30px;
            }
            .search-form {
                margin: 0 20px;
            }
        }
        @media (max-width: 768px) {
            .mobile-menu-toggle {
                display: block;
            }
            .search-form {
                order: 3;
                margin: 20px 0 0;
                width: 100%;
                max-width: 100%;
            }
            .header-top {
                flex-wrap: wrap;
            }
            .logo {
                order: 1;
            }
            .mobile-menu-toggle {
                order: 2;
            }
            nav {
                display: none;
                width: 100%;
                order: 4;
                margin-top: 20px;
            }
            nav.active {
                display: block;
            }
            .nav-menu {
                flex-direction: column;
                gap: 0;
            }
            .nav-menu li {
                border-bottom: 1px solid var(--border-color);
            }
            .nav-menu a {
                display: block;
                padding: 15px 0;
            }
            .article-content {
                padding: 25px;
            }
            .article-header h1 {
                font-size: 26px;
            }
            .content-section h2 {
                font-size: 24px;
            }
            .content-section h3 {
                font-size: 20px;
            }
            .article-meta {
                flex-direction: column;
                align-items: center;
                gap: 10px;
            }
            .step {
                flex-direction: column;
                gap: 15px;
            }
            .footer-links-list {
                flex-direction: column;
                gap: 15px;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .fade-in {
            animation: fadeIn 0.6s ease-out;
        }
        .text-bold {
            font-weight: 700;
            color: var(--text-primary);
        }
        .text-primary {
            color: var(--primary-color);
        }
        .text-accent {
            color: var(--accent-color);
        }
        .mb-20 { margin-bottom: 20px; }
        .mb-30 { margin-bottom: 30px; }
        .mb-40 { margin-bottom: 40px; }
        .mt-20 { margin-top: 20px; }
        .mt-30 { margin-top: 30px; }
        .mt-40 { margin-top: 40px; }