:root {
            --primary: #E63946;
            --primary-dark: #B71C1C;
            --secondary: #1D3557;
            --accent: #F4A261;
            --light: #F1FAEE;
            --dark: #0A0F1C;
            --gray: #8D99AE;
            --success: #2A9D8F;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
            --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: 1.8;
            color: #333;
            background: linear-gradient(135deg, #0A0F1C 0%, #1D3557 100%);
            background-attachment: fixed;
            min-height: 100vh;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .header {
            background: rgba(10, 15, 28, 0.95);
            backdrop-filter: blur(10px);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 2px solid var(--primary);
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--light);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
        }
        .logo:hover {
            color: var(--accent);
            transform: translateY(-2px);
        }
        .logo span {
            color: var(--primary);
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
        }
        .nav-link {
            color: var(--light);
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: var(--transition);
            position: relative;
        }
        .nav-link:hover {
            background: rgba(230, 57, 70, 0.2);
            color: var(--accent);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: var(--transition);
        }
        .nav-link:hover::after {
            width: 80%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: var(--light);
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
            transition: var(--transition);
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
        }
        .hamburger:hover {
            color: var(--accent);
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background: var(--secondary);
            padding: 1rem;
            border-radius: 8px;
            margin-top: 1rem;
            box-shadow: var(--shadow);
        }
        .mobile-nav.active {
            display: flex;
        }
        .breadcrumb {
            background: rgba(29, 53, 87, 0.9);
            padding: 1rem 0;
            margin-bottom: 2rem;
            border-radius: 0 0 8px 8px;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 0.5rem;
            color: var(--gray);
        }
        .breadcrumb a {
            color: var(--light);
            text-decoration: none;
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .search-section {
            background: linear-gradient(135deg, var(--secondary) 0%, #0A0F1C 100%);
            padding: 3rem 0;
            margin-bottom: 3rem;
            border-radius: 12px;
            text-align: center;
            box-shadow: var(--shadow);
        }
        .search-title {
            color: var(--light);
            font-size: 2rem;
            margin-bottom: 1.5rem;
            text-shadow: 0 2px 4px rgba(0,0,0,0.5);
        }
        .search-form {
            max-width: 600px;
            margin: 0 auto;
            display: flex;
            gap: 0;
        }
        .search-input {
            flex: 1;
            padding: 1rem 1.5rem;
            border: none;
            border-radius: 50px 0 0 50px;
            font-size: 1.1rem;
            background: rgba(255,255,255,0.95);
            transition: var(--transition);
        }
        .search-input:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.3);
        }
        .search-btn {
            background: var(--primary);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 0 50px 50px 0;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-btn:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
        }
        .main-content {
            background: rgba(255, 255, 255, 0.95);
            border-radius: 16px;
            padding: 3rem;
            margin-bottom: 3rem;
            box-shadow: var(--shadow);
        }
        @media (max-width: 768px) {
            .main-content {
                padding: 1.5rem;
            }
        }
        .article-header {
            text-align: center;
            margin-bottom: 3rem;
            padding-bottom: 2rem;
            border-bottom: 3px solid var(--primary);
        }
        .article-title {
            color: var(--secondary);
            font-size: 2.8rem;
            line-height: 1.2;
            margin-bottom: 1rem;
            text-shadow: 0 2px 4px rgba(0,0,0,0.1);
        }
        @media (max-width: 768px) {
            .article-title {
                font-size: 2rem;
            }
        }
        .article-meta {
            display: flex;
            justify-content: center;
            gap: 2rem;
            color: var(--gray);
            font-size: 0.95rem;
        }
        .meta-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .content-section {
            margin-bottom: 3rem;
        }
        .section-title {
            color: var(--secondary);
            font-size: 2rem;
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .section-title i {
            color: var(--primary);
        }
        .highlight-box {
            background: linear-gradient(135deg, rgba(230, 57, 70, 0.1) 0%, rgba(29, 53, 87, 0.1) 100%);
            border-left: 4px solid var(--primary);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .highlight-box h3 {
            color: var(--secondary);
            margin-bottom: 1rem;
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .feature-card {
            background: white;
            padding: 1.5rem;
            border-radius: 8px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.1);
            transition: var(--transition);
            border-top: 3px solid var(--accent);
        }
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 16px rgba(0,0,0,0.2);
        }
        .feature-card h4 {
            color: var(--secondary);
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .download-section {
            text-align: center;
            background: linear-gradient(135deg, var(--secondary) 0%, #0A0F1C 100%);
            padding: 3rem;
            border-radius: 12px;
            margin: 3rem 0;
            color: white;
        }
        .download-title {
            font-size: 2.5rem;
            margin-bottom: 1.5rem;
            color: var(--light);
        }
        .download-btn {
            display: inline-flex;
            align-items: center;
            gap: 15px;
            background: var(--success);
            color: white;
            text-decoration: none;
            padding: 1.2rem 3rem;
            border-radius: 50px;
            font-size: 1.3rem;
            font-weight: 700;
            margin: 1rem 0;
            transition: var(--transition);
            box-shadow: 0 4px 15px rgba(42, 157, 143, 0.4);
        }
        .download-btn:hover {
            background: #21867a;
            transform: translateY(-3px) scale(1.05);
            box-shadow: 0 6px 20px rgba(42, 157, 143, 0.6);
        }
        .download-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-top: 3rem;
        }
        .step {
            background: rgba(255,255,255,0.1);
            padding: 1.5rem;
            border-radius: 8px;
            backdrop-filter: blur(10px);
        }
        .step-number {
            display: inline-block;
            background: var(--primary);
            color: white;
            width: 40px;
            height: 40px;
            line-height: 40px;
            border-radius: 50%;
            margin-bottom: 1rem;
            font-weight: bold;
        }
        .article-image {
            width: 100%;
            height: auto;
            border-radius: 12px;
            margin: 2rem 0;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .article-image:hover {
            transform: scale(1.01);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            margin-top: 0.5rem;
            font-size: 0.9rem;
        }
        .user-interaction {
            background: rgba(241, 250, 238, 0.9);
            padding: 2.5rem;
            border-radius: 12px;
            margin: 3rem 0;
            box-shadow: var(--shadow);
        }
        .rating-section {
            text-align: center;
            margin-bottom: 2rem;
        }
        .star-rating {
            display: flex;
            justify-content: center;
            gap: 5px;
            margin: 1rem 0;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: #FFD700;
            transform: scale(1.2);
        }
        .comment-form {
            display: grid;
            gap: 1rem;
            margin-top: 2rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .form-input {
            padding: 1rem;
            border: 2px solid #ddd;
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.1);
        }
        .submit-btn {
            background: var(--secondary);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }
        .submit-btn:hover {
            background: var(--primary);
            transform: translateY(-2px);
        }
        .footer {
            background: var(--dark);
            color: var(--light);
            padding: 4rem 0 2rem;
            margin-top: 4rem;
        }
        .footer-links {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 3rem;
        }
        .web-link {
            background: rgba(255,255,255,0.05);
            padding: 1rem;
            border-radius: 6px;
            margin-bottom: 0.8rem;
            transition: var(--transition);
        }
        .web-link:hover {
            background: rgba(255,255,255,0.1);
            transform: translateX(5px);
        }
        .web-link a {
            color: var(--accent);
            text-decoration: none;
            display: block;
            font-weight: 500;
        }
        .footer-bottom {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: var(--gray);
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .search-form {
                flex-direction: column;
                gap: 1rem;
            }
            .search-input,
            .search-btn {
                width: 100%;
                border-radius: 50px;
            }
            .feature-grid,
            .download-steps {
                grid-template-columns: 1fr;
            }
            .article-meta {
                flex-direction: column;
                gap: 1rem;
            }
        }
        h3 {
            color: var(--secondary);
            margin: 1.5rem 0 1rem;
            font-size: 1.5rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        strong {
            color: var(--primary);
        }
        em {
            color: var(--accent);
        }
        ul, ol {
            margin: 1rem 0 1rem 2rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .fade-in {
            animation: fadeInUp 0.6s ease-out;
        }
        ::-webkit-scrollbar {
            width: 10px;
        }
        ::-webkit-scrollbar-track {
            background: var(--dark);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary);
            border-radius: 5px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--primary-dark);
        }