:root {
            --primary: #1a237e;
            --secondary: #ff9800;
            --accent: #4caf50;
            --light: #f5f5f7;
            --dark: #121212;
            --text: #333333;
            --text-light: #666666;
            --shadow: 0 4px 12px rgba(0,0,0,0.08);
            --radius: 12px;
            --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: 1.6;
            color: var(--text);
            background-color: #fff;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        ul {
            list-style: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .btn {
            display: inline-block;
            padding: 14px 28px;
            background: linear-gradient(135deg, var(--secondary), #ff5722);
            color: white;
            border-radius: 50px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: var(--shadow);
        }
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 18px rgba(255, 152, 0, 0.3);
        }
        .section {
            padding: 80px 0;
        }
        .section-title {
            font-size: 2.5rem;
            margin-bottom: 1.5rem;
            color: var(--primary);
            position: relative;
            padding-bottom: 15px;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 80px;
            height: 4px;
            background: var(--secondary);
            border-radius: 2px;
        }
        .highlight {
            background: linear-gradient(120deg, #ffeb3b 0%, #ffeb3b 100%);
            background-repeat: no-repeat;
            background-size: 100% 0.3em;
            background-position: 0 88%;
            padding: 0 2px;
            font-weight: 700;
        }
        .header {
            background: var(--primary);
            color: white;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 15px rgba(0,0,0,0.1);
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
        }
        .logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: var(--secondary);
        }
        .nav {
            display: flex;
            gap: 30px;
        }
        .nav a {
            font-weight: 600;
            font-size: 1.05rem;
            padding: 8px 0;
            position: relative;
            transition: var(--transition);
        }
        .nav a:hover {
            color: var(--secondary);
        }
        .nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--secondary);
            transition: width 0.3s ease;
        }
        .nav a:hover::after {
            width: 100%;
        }
        .mobile-toggle {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            background: var(--light);
            padding: 15px 0;
            margin-bottom: 40px;
        }
        .breadcrumb ul {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin-left: 10px;
            color: var(--text-light);
        }
        .hero {
            background: linear-gradient(rgba(26, 35, 126, 0.9), rgba(26, 35, 126, 0.8)), url('https://images.unsplash.com/photo-1512476446317-8e54cc6f4036?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80') center/cover no-repeat;
            color: white;
            padding: 100px 0;
            text-align: center;
            border-radius: 0 0 30px 30px;
            margin-bottom: 50px;
        }
        .hero h1 {
            font-size: 3.2rem;
            margin-bottom: 20px;
            line-height: 1.2;
        }
        .hero p {
            font-size: 1.3rem;
            max-width: 800px;
            margin: 0 auto 30px;
            opacity: 0.9;
        }
        .content-area {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        .main-content {
            font-size: 1.1rem;
        }
        .main-content p {
            margin-bottom: 1.8rem;
            line-height: 1.8;
        }
        .main-content h2 {
            font-size: 2rem;
            margin: 3rem 0 1.5rem;
            color: var(--primary);
            border-left: 5px solid var(--secondary);
            padding-left: 15px;
        }
        .main-content h3 {
            font-size: 1.6rem;
            margin: 2.5rem 0 1rem;
            color: #2c387e;
        }
        .main-content ul, .main-content ol {
            margin-bottom: 1.8rem;
            padding-left: 2rem;
        }
        .main-content li {
            margin-bottom: 0.8rem;
        }
        .feature-img {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            margin: 2.5rem 0;
        }
        .feature-img figcaption {
            padding: 15px;
            background: var(--light);
            font-style: italic;
            color: var(--text-light);
            text-align: center;
        }
        .info-box {
            background: var(--light);
            border-left: 5px solid var(--accent);
            padding: 25px;
            margin: 2rem 0;
            border-radius: 0 var(--radius) var(--radius) 0;
        }
        .download-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 25px;
            margin: 3rem 0;
        }
        .step {
            background: white;
            padding: 30px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            text-align: center;
            transition: var(--transition);
        }
        .step:hover {
            transform: translateY(-10px);
        }
        .step i {
            font-size: 3rem;
            color: var(--secondary);
            margin-bottom: 20px;
        }
        .sidebar {
            position: sticky;
            top: 120px;
            height: fit-content;
        }
        .sidebar-widget {
            background: white;
            padding: 30px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            margin-bottom: 30px;
        }
        .sidebar-widget h3 {
            font-size: 1.4rem;
            margin-bottom: 20px;
            color: var(--primary);
            padding-bottom: 10px;
            border-bottom: 2px solid var(--light);
        }
        .search-form input {
            width: 100%;
            padding: 15px;
            border: 2px solid #ddd;
            border-radius: 50px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-form input:focus {
            outline: none;
            border-color: var(--secondary);
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            font-size: 2rem;
            color: #ffc107;
            margin: 15px 0;
        }
        .star {
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover {
            transform: scale(1.2);
        }
        .comment-form textarea {
            width: 100%;
            padding: 15px;
            border: 2px solid #ddd;
            border-radius: var(--radius);
            font-family: inherit;
            font-size: 1rem;
            resize: vertical;
            min-height: 150px;
            margin-bottom: 15px;
            transition: var(--transition);
        }
        .comment-form textarea:focus {
            outline: none;
            border-color: var(--secondary);
        }
        .footer-links {
            background: var(--light);
            padding: 60px 0 30px;
        }
        .web-link-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 20px;
            margin-bottom: 40px;
        }
        .web-link {
            background: white;
            padding: 20px;
            border-radius: var(--radius);
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
            transition: var(--transition);
        }
        .web-link:hover {
            transform: translateX(5px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .web-link a {
            color: var(--primary);
            font-weight: 600;
            display: block;
        }
        .web-link a:hover {
            color: var(--secondary);
        }
        .footer {
            background: var(--dark);
            color: white;
            padding: 40px 0 20px;
            text-align: center;
        }
        .footer p {
            opacity: 0.8;
            margin-bottom: 10px;
        }
        .copyright {
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
            opacity: 0.7;
        }
        @media (max-width: 992px) {
            .content-area {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
            .hero h1 {
                font-size: 2.5rem;
            }
        }
        @media (max-width: 768px) {
            .mobile-toggle {
                display: block;
            }
            .nav {
                position: fixed;
                top: 90px;
                left: 0;
                width: 100%;
                background: var(--primary);
                flex-direction: column;
                padding: 20px;
                gap: 0;
                clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
                transition: clip-path 0.4s ease;
                box-shadow: 0 10px 20px rgba(0,0,0,0.1);
            }
            .nav.active {
                clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
            }
            .nav a {
                padding: 15px 0;
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
            .section {
                padding: 60px 0;
            }
            .section-title {
                font-size: 2rem;
            }
            .hero {
                padding: 70px 0;
            }
        }