:root {
            --primary: #FF9800;
            --secondary: #4CAF50;
            --dark: #333;
            --light: #f8f9fa;
            --gray: #6c757d;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--dark);
            background-color: #fff;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .header {
            background: linear-gradient(135deg, var(--primary) 0%, #FF5722 100%);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            font-size: 2rem;
        }
        .logo:hover {
            transform: scale(1.05);
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
        }
        .nav-desktop a {
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
        }
        .nav-desktop a:hover {
            background-color: rgba(255,255,255,0.2);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 4px;
            cursor: pointer;
            padding: 5px;
        }
        .hamburger span {
            width: 25px;
            height: 3px;
            background-color: white;
            border-radius: 2px;
            transition: var(--transition);
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(7px, -6px);
        }
        @media (max-width: 768px) {
            .hamburger {
                display: flex;
            }
        }
        .nav-mobile {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            background-color: white;
            flex-direction: column;
            padding: 1rem;
            box-shadow: var(--shadow);
            border-top: 2px solid var(--primary);
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            padding: 1rem;
            color: var(--dark);
            border-bottom: 1px solid #eee;
            font-weight: 600;
        }
        .nav-mobile a:hover {
            background-color: var(--light);
            color: var(--primary);
            padding-left: 1.5rem;
        }
        .breadcrumb {
            background-color: var(--light);
            padding: 1rem 0;
            border-bottom: 1px solid #dee2e6;
        }
        .breadcrumb ul {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 0.5rem;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
        }
        .breadcrumb li:not(:last-child)::after {
            content: ">";
            margin-left: 0.5rem;
            color: var(--gray);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            padding: 2.5rem 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            font-size: 1.1rem;
        }
        .article-content h1 {
            font-size: 2.5rem;
            color: var(--dark);
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        @media (max-width: 768px) {
            .article-content h1 {
                font-size: 2rem;
            }
        }
        .article-content h2 {
            font-size: 1.8rem;
            color: var(--primary);
            margin: 2.5rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #eee;
        }
        .article-content h3 {
            font-size: 1.4rem;
            color: var(--secondary);
            margin: 2rem 0 1rem;
        }
        .article-content p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .highlight {
            background-color: #FFF3CD;
            border-left: 4px solid var(--primary);
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 4px 4px 0;
        }
        .featured-image {
            margin: 2rem 0;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .featured-image figcaption {
            padding: 1rem;
            background-color: var(--light);
            font-style: italic;
            color: var(--gray);
            text-align: center;
        }
        .download-box {
            background: linear-gradient(135deg, var(--secondary) 0%, #2E7D32 100%);
            color: white;
            padding: 2rem;
            border-radius: 10px;
            margin: 2rem 0;
            text-align: center;
            box-shadow: var(--shadow);
        }
        .download-btn {
            display: inline-block;
            background-color: var(--primary);
            color: white;
            padding: 1rem 2rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.2rem;
            margin-top: 1rem;
            transition: var(--transition);
        }
        .download-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.2);
            background-color: #FF8A00;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .widget {
            background-color: var(--light);
            border-radius: 8px;
            padding: 1.5rem;
            box-shadow: var(--shadow);
        }
        .widget h3 {
            color: var(--dark);
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--primary);
        }
        .search-form {
            display: flex;
        }
        .search-form input {
            flex: 1;
            padding: 0.75rem;
            border: 1px solid #ddd;
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }
        .search-form button {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: #E68900;
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 5px;
            margin: 1rem 0;
            font-size: 1.5rem;
            color: #FFD700;
        }
        .star {
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover {
            transform: scale(1.2);
        }
        .rating-form input,
        .comment-form textarea,
        .comment-form input {
            width: 100%;
            padding: 0.75rem;
            margin-bottom: 1rem;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-family: inherit;
        }
        .submit-btn {
            background-color: var(--secondary);
            color: white;
            border: none;
            padding: 0.75rem 1.5rem;
            border-radius: 4px;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            width: 100%;
        }
        .submit-btn:hover {
            background-color: #3D8B40;
        }
        .comment-list {
            margin-top: 1.5rem;
        }
        .comment {
            background-color: white;
            padding: 1rem;
            border-radius: 4px;
            margin-bottom: 1rem;
            border-left: 3px solid var(--primary);
        }
        .comment-author {
            font-weight: 700;
            color: var(--primary);
        }
        .comment-date {
            font-size: 0.9rem;
            color: var(--gray);
            margin-left: 1rem;
        }
        .footer-links {
            background-color: var(--light);
            padding: 3rem 0;
            border-top: 1px solid #dee2e6;
            border-bottom: 1px solid #dee2e6;
        }
        .links-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1.5rem;
        }
        .web-link {
            background-color: white;
            padding: 1.5rem;
            border-radius: 8px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.05);
            transition: var(--transition);
        }
        .web-link:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow);
        }
        .web-link a {
            color: var(--secondary);
            font-weight: 600;
        }
        .web-link a:hover {
            color: var(--primary);
            text-decoration: underline;
        }
        .footer {
            background-color: var(--dark);
            color: white;
            padding: 2rem 0;
            text-align: center;
        }
        .footer a {
            color: #FFD700;
        }
        .footer a:hover {
            text-decoration: underline;
        }
        .copyright {
            margin-top: 1.5rem;
            padding-top: 1.5rem;
            border-top: 1px solid #444;
            color: #aaa;
            font-size: 0.9rem;
        }
        .text-center {
            text-align: center;
        }
        .mb-1 { margin-bottom: 0.5rem; }
        .mb-2 { margin-bottom: 1rem; }
        .mb-3 { margin-bottom: 1.5rem; }
        .mb-4 { margin-bottom: 2rem; }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .keyword {
            background-color: #E3F2FD;
            padding: 0.2rem 0.4rem;
            border-radius: 3px;
            font-weight: 600;
        }