:root {
            --primary: #8a2be2;
            --secondary: #ff6b35;
            --dark: #1a1a2e;
            --light: #f8f9fa;
            --gray: #6c757d;
            --success: #28a745;
            --warning: #ffc107;
            --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: #333;
            background: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            min-height: 100vh;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: var(--dark);
            color: white;
            padding: 1rem 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: 2rem;
            font-weight: 800;
            color: var(--secondary);
            text-decoration: none;
            background: linear-gradient(45deg, #ff6b35, #8a2be2);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            font-size: 2.2rem;
        }
        .breadcrumb {
            background: #2d3047;
            padding: 0.8rem 0;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            gap: 10px;
        }
        .breadcrumb a {
            color: #adb5bd;
            text-decoration: none;
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--secondary);
        }
        .breadcrumb li:not(:last-child)::after {
            content: '>';
            margin-left: 10px;
            color: var(--gray);
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: var(--transition);
        }
        nav a:hover,
        nav a.active {
            background: var(--primary);
            transform: translateY(-2px);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .search-box {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            padding: 3rem 0;
            text-align: center;
            margin: 2rem 0;
            border-radius: 15px;
            box-shadow: var(--shadow);
        }
        .search-box h2 {
            color: white;
            margin-bottom: 1.5rem;
            font-size: 2.2rem;
        }
        .search-form {
            max-width: 600px;
            margin: 0 auto;
            display: flex;
            gap: 10px;
        }
        .search-input {
            flex: 1;
            padding: 1rem 1.5rem;
            border: none;
            border-radius: 50px;
            font-size: 1.1rem;
            outline: none;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
        }
        .search-btn {
            padding: 1rem 2rem;
            background: var(--secondary);
            color: white;
            border: none;
            border-radius: 50px;
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-btn:hover {
            background: #ff8533;
            transform: scale(1.05);
        }
        main {
            padding: 2rem 0;
        }
        .article-header {
            text-align: center;
            margin-bottom: 3rem;
            padding: 2rem;
            background: white;
            border-radius: 15px;
            box-shadow: var(--shadow);
        }
        .article-header h1 {
            font-size: 2.8rem;
            color: var(--dark);
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        .meta-info {
            display: flex;
            justify-content: center;
            gap: 2rem;
            color: var(--gray);
            margin-top: 1.5rem;
        }
        .meta-info span {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
        }
        .article-content {
            background: white;
            padding: 2.5rem;
            border-radius: 15px;
            box-shadow: var(--shadow);
        }
        .article-section {
            margin-bottom: 3rem;
        }
        .article-section h2 {
            color: var(--primary);
            margin-bottom: 1.5rem;
            padding-bottom: 0.8rem;
            border-bottom: 3px solid var(--secondary);
            font-size: 2rem;
        }
        .article-section h3 {
            color: var(--dark);
            margin: 1.5rem 0 1rem;
            font-size: 1.6rem;
        }
        .article-section p {
            margin-bottom: 1.2rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .highlight {
            background: linear-gradient(120deg, #ffecb3 0%, #ffecb3 100%);
            padding: 1.5rem;
            border-left: 5px solid var(--warning);
            margin: 2rem 0;
            border-radius: 0 10px 10px 0;
        }
        .feature-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .feature-card {
            background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
            color: white;
            padding: 1.5rem;
            border-radius: 10px;
            transition: var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
        }
        .feature-card i {
            font-size: 2.5rem;
            margin-bottom: 1rem;
        }
        .image-container {
            margin: 2.5rem 0;
            text-align: center;
        }
        .article-img {
            max-width: 100%;
            height: auto;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
            transition: var(--transition);
        }
        .article-img:hover {
            transform: scale(1.02);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .widget {
            background: white;
            padding: 1.8rem;
            border-radius: 15px;
            box-shadow: var(--shadow);
        }
        .widget h3 {
            color: var(--primary);
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--light);
        }
        .download-box {
            background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
            color: white;
            text-align: center;
            padding: 2rem;
        }
        .download-btn {
            display: inline-block;
            background: var(--secondary);
            color: white;
            padding: 1rem 2rem;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 700;
            margin-top: 1rem;
            transition: var(--transition);
        }
        .download-btn:hover {
            background: #ff8533;
            transform: scale(1.05);
        }
        .rating-section {
            background: white;
            padding: 2.5rem;
            border-radius: 15px;
            margin: 3rem 0;
            box-shadow: var(--shadow);
        }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
            max-width: 600px;
            margin: 0 auto;
        }
        .star-rating {
            display: flex;
            gap: 10px;
            justify-content: center;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 2.5rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star-rating label:hover,
        .star-rating label:hover ~ label,
        .star-rating input:checked ~ label {
            color: var(--warning);
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .form-control {
            padding: 1rem;
            border: 2px solid #e9ecef;
            border-radius: 10px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            border-color: var(--primary);
            outline: none;
            box-shadow: 0 0 0 3px rgba(138, 43, 226, 0.1);
        }
        textarea.form-control {
            min-height: 150px;
            resize: vertical;
        }
        .submit-btn {
            background: linear-gradient(135deg, var(--primary), #6a11cb);
            color: white;
            border: none;
            padding: 1.2rem 2rem;
            border-radius: 10px;
            font-weight: 700;
            font-size: 1.1rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .submit-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 7px 20px rgba(138, 43, 226, 0.3);
        }
        .web-links {
            background: var(--dark);
            padding: 3rem 0;
            margin-top: 3rem;
        }
        .web-links-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1.5rem;
        }
        .web-link {
            background: #2d3047;
            padding: 1.2rem;
            border-radius: 10px;
            transition: var(--transition);
        }
        .web-link:hover {
            background: var(--primary);
            transform: translateX(10px);
        }
        .web-link a {
            color: white;
            text-decoration: none;
            display: block;
            font-size: 1rem;
        }
        footer {
            background: #1a1a2e;
            color: white;
            padding: 3rem 0 2rem;
            text-align: center;
        }
        .footer-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .copyright {
            width: 100%;
            padding-top: 2rem;
            border-top: 1px solid #2d3047;
            color: #adb5bd;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .article-header h1 {
                font-size: 2.3rem;
            }
            nav ul {
                gap: 1rem;
            }
        }
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
            }
            nav {
                width: 100%;
                display: none;
                margin-top: 1rem;
            }
            nav.active {
                display: block;
            }
            nav ul {
                flex-direction: column;
                gap: 0.5rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-btn {
                justify-content: center;
            }
            .meta-info {
                flex-direction: column;
                gap: 1rem;
                text-align: center;
            }
            .footer-content {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 480px) {
            .article-header h1 {
                font-size: 1.8rem;
            }
            .article-section h2 {
                font-size: 1.6rem;
            }
            .feature-list {
                grid-template-columns: 1fr;
            }
            .star-rating label {
                font-size: 2rem;
            }
        }