:root {
            --primary: #0056D2;
            --secondary: #FF0035;
            --accent: #00C2FF;
            --dark: #0A1428;
            --light: #F5F7FA;
            --gray: #6C757D;
            --success: #28A745;
            --warning: #FFC107;
            --transition: all 0.3s ease;
            --shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            --radius: 8px;
            --container-max: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
            line-height: 1.6;
        }
        body {
            background-color: var(--light);
            color: #333;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        ul {
            list-style: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
        }
        .btn {
            display: inline-block;
            padding: 12px 28px;
            background: var(--primary);
            color: white;
            border: none;
            border-radius: var(--radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            text-align: center;
        }
        .btn:hover {
            background: var(--secondary);
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }
        .section {
            padding: 80px 0;
        }
        .header {
            background: var(--dark);
            color: white;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo span {
            color: var(--accent);
        }
        .logo i {
            color: var(--secondary);
        }
        .desktop-nav ul {
            display: flex;
            gap: 30px;
        }
        .desktop-nav a {
            font-weight: 600;
            padding: 8px 0;
            border-bottom: 2px solid transparent;
        }
        .desktop-nav a:hover,
        .desktop-nav a.active {
            color: var(--accent);
            border-color: var(--accent);
        }
        .search-box {
            display: flex;
            background: white;
            border-radius: 50px;
            overflow: hidden;
            width: 300px;
        }
        .search-box input {
            flex: 1;
            border: none;
            padding: 12px 20px;
            outline: none;
        }
        .search-box button {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0 20px;
            cursor: pointer;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: var(--accent);
        }
        .mobile-nav {
            position: fixed;
            top: 70px;
            left: 0;
            width: 100%;
            background: var(--dark);
            padding: 20px;
            transform: translateY(-100%);
            opacity: 0;
            transition: var(--transition);
            z-index: 999;
            box-shadow: 0 10px 20px rgba(0,0,0,0.2);
        }
        .mobile-nav.active {
            transform: translateY(0);
            opacity: 1;
        }
        .mobile-nav ul {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .mobile-nav a {
            display: block;
            padding: 15px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            font-weight: 600;
        }
        .mobile-nav a:hover {
            color: var(--accent);
            padding-left: 25px;
        }
        .breadcrumb {
            background: rgba(255,255,255,0.05);
            padding: 15px 0;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "/";
            margin-left: 10px;
            color: var(--gray);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .hero {
            background: linear-gradient(135deg, var(--dark) 0%, #1a2b4e 100%);
            color: white;
            padding: 100px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path d="M0,0 L100,0 L100,100 Z" fill="%2300C2FF" opacity="0.05"/>');
            background-size: cover;
        }
        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 20px;
            line-height: 1.2;
            position: relative;
        }
        .hero h1 span {
            color: var(--accent);
        }
        .hero p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto 30px;
            color: rgba(255,255,255,0.9);
        }
        .article-content {
            background: white;
            border-radius: var(--radius);
            padding: 60px;
            box-shadow: var(--shadow);
            margin-top: -50px;
            position: relative;
            z-index: 1;
        }
        .content-section {
            margin-bottom: 60px;
        }
        .content-section h2 {
            font-size: 2.2rem;
            color: var(--dark);
            margin-bottom: 25px;
            padding-bottom: 15px;
            border-bottom: 3px solid var(--primary);
            position: relative;
        }
        .content-section h2::after {
            content: "";
            position: absolute;
            bottom: -3px;
            left: 0;
            width: 100px;
            height: 3px;
            background: var(--secondary);
        }
        .content-section h3 {
            font-size: 1.8rem;
            color: var(--dark);
            margin: 40px 0 20px;
            padding-left: 15px;
            border-left: 5px solid var(--accent);
        }
        .content-section p {
            margin-bottom: 20px;
            font-size: 1.1rem;
            line-height: 1.8;
            color: #444;
        }
        .content-section p.lead {
            font-size: 1.3rem;
            font-weight: 500;
            color: var(--dark);
            background: rgba(0, 198, 255, 0.05);
            padding: 20px;
            border-radius: var(--radius);
            border-left: 4px solid var(--accent);
        }
        .highlight {
            background: linear-gradient(120deg, rgba(0, 198, 255, 0.2) 0%, rgba(0, 198, 255, 0) 100%);
            padding: 30px;
            border-radius: var(--radius);
            margin: 30px 0;
            border: 1px solid rgba(0, 198, 255, 0.3);
        }
        .highlight h4 {
            color: var(--primary);
            font-size: 1.5rem;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 25px;
            margin: 40px 0;
        }
        .stat-card {
            background: var(--light);
            padding: 25px;
            border-radius: var(--radius);
            text-align: center;
            border-top: 5px solid var(--primary);
            transition: var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--shadow);
        }
        .stat-card i {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 15px;
        }
        .stat-card h5 {
            font-size: 1.5rem;
            margin-bottom: 10px;
            color: var(--dark);
        }
        .feature-img {
            border-radius: var(--radius);
            overflow: hidden;
            margin: 40px 0;
            box-shadow: var(--shadow);
            border: 5px solid white;
        }
        .feature-img figcaption {
            padding: 15px;
            background: var(--light);
            font-style: italic;
            color: var(--gray);
            text-align: center;
        }
        .info-table {
            width: 100%;
            border-collapse: collapse;
            margin: 30px 0;
            box-shadow: 0 0 10px rgba(0,0,0,0.05);
        }
        .info-table th {
            background: var(--primary);
            color: white;
            padding: 15px;
            text-align: left;
        }
        .info-table td {
            padding: 15px;
            border-bottom: 1px solid #eee;
        }
        .info-table tr:nth-child(even) {
            background: #f9f9f9;
        }
        .info-table tr:hover {
            background: rgba(0, 86, 210, 0.05);
        }
        .quote {
            border-left: 5px solid var(--secondary);
            padding: 25px;
            margin: 40px 0;
            background: rgba(255, 0, 53, 0.03);
            font-style: italic;
            font-size: 1.2rem;
            color: #555;
        }
        .quote-author {
            text-align: right;
            font-weight: bold;
            color: var(--dark);
            margin-top: 15px;
        }
        .tip-box {
            background: rgba(255, 193, 7, 0.1);
            border: 1px solid var(--warning);
            border-radius: var(--radius);
            padding: 25px;
            margin: 30px 0;
            display: flex;
            gap: 20px;
            align-items: flex-start;
        }
        .tip-box i {
            color: var(--warning);
            font-size: 1.8rem;
            flex-shrink: 0;
        }
        .two-column {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 40px;
            margin: 40px 0;
        }
        .interactive-section {
            background: var(--light);
            padding: 60px;
            border-radius: var(--radius);
            margin: 60px 0;
        }
        .rating-system {
            text-align: center;
            margin-bottom: 40px;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin: 20px 0;
        }
        .star {
            font-size: 2.5rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star.active,
        .star:hover {
            color: var(--warning);
        }
        .comment-form,
        .search-form {
            background: white;
            padding: 30px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            margin-top: 30px;
        }
        .form-group {
            margin-bottom: 25px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--dark);
        }
        .form-control {
            width: 100%;
            padding: 15px;
            border: 2px solid #eee;
            border-radius: var(--radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            border-color: var(--accent);
            outline: none;
        }
        textarea.form-control {
            min-height: 150px;
            resize: vertical;
        }
        .footer {
            background: var(--dark);
            color: white;
            padding: 80px 0 30px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 50px;
            margin-bottom: 50px;
        }
        .footer-section h4 {
            font-size: 1.5rem;
            margin-bottom: 25px;
            color: var(--accent);
            position: relative;
            padding-bottom: 10px;
        }
        .footer-section h4::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 3px;
            background: var(--secondary);
        }
        .footer-links li {
            margin-bottom: 15px;
        }
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background: rgba(255,255,255,0.05);
            padding: 20px;
            border-radius: var(--radius);
            margin: 30px 0;
            border-left: 4px solid var(--accent);
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: rgba(255,255,255,0.7);
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .hero h1 {
                font-size: 2.8rem;
            }
            .article-content {
                padding: 40px;
            }
            .content-section h2 {
                font-size: 2rem;
            }
        }
        @media (max-width: 768px) {
            .desktop-nav,
            .search-box {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .hero {
                padding: 80px 0;
            }
            .hero h1 {
                font-size: 2.3rem;
            }
            .article-content {
                padding: 30px 20px;
                margin-top: -30px;
            }
            .content-section h2 {
                font-size: 1.8rem;
            }
            .content-section h3 {
                font-size: 1.5rem;
            }
            .interactive-section {
                padding: 40px 20px;
            }
        }
        @media (max-width: 576px) {
            .hero h1 {
                font-size: 1.9rem;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .two-column {
                grid-template-columns: 1fr;
            }
        }