:root {
            --primary-color: #1a1a2e;
            --secondary-color: #16213e;
            --accent-color: #0fccce;
            --accent-hover: #0db9bb;
            --text-primary: #f0f0f0;
            --text-secondary: #b0b0c0;
            --card-bg: #222244;
            --border-color: #2d2d5a;
            --success-color: #4CAF50;
            --warning-color: #ff9800;
            --danger-color: #f44336;
            --transition: all 0.3s ease;
            --shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
            --radius: 10px;
            --header-height: 70px;
        }
        * {
            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: var(--text-primary);
            background: linear-gradient(135deg, var(--primary-color) 0%, #0c0c1a 100%);
            min-height: 100vh;
            overflow-x: hidden;
        }
        a {
            color: var(--accent-color);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-hover);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: rgba(22, 33, 62, 0.95);
            backdrop-filter: blur(10px);
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            height: var(--header-height);
            border-bottom: 2px solid var(--border-color);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 100%;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent-color);
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .logo span {
            color: var(--text-primary);
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        .nav-links a {
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1rem;
            padding: 8px 0;
            position: relative;
        }
        .nav-links a:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-color);
            transition: var(--transition);
        }
        .nav-links a:hover:after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: var(--text-primary);
            cursor: pointer;
            padding: 5px;
        }
        .breadcrumb {
            background: rgba(34, 34, 68, 0.8);
            padding: 15px 0;
            margin-top: var(--header-height);
        }
        .breadcrumb ul {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li {
            margin-right: 10px;
            font-size: 0.9rem;
        }
        .breadcrumb li:not(:last-child):after {
            content: '>';
            margin-left: 10px;
            color: var(--text-secondary);
        }
        .breadcrumb a {
            color: var(--text-secondary);
        }
        .breadcrumb a:hover {
            color: var(--accent-color);
        }
        main {
            padding: 40px 0;
        }
        .article-header {
            margin-bottom: 40px;
            text-align: center;
            padding: 30px;
            background: var(--card-bg);
            border-radius: var(--radius);
            border-left: 5px solid var(--accent-color);
        }
        h1 {
            font-size: 2.8rem;
            margin-bottom: 20px;
            color: var(--accent-color);
            line-height: 1.2;
        }
        .meta-info {
            display: flex;
            justify-content: center;
            gap: 20px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            flex-wrap: wrap;
        }
        .meta-item i {
            margin-right: 5px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        article {
            background: var(--card-bg);
            padding: 40px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        h2 {
            font-size: 2rem;
            margin: 40px 0 20px;
            color: var(--accent-color);
            border-bottom: 2px solid var(--border-color);
            padding-bottom: 10px;
        }
        h3 {
            font-size: 1.6rem;
            margin: 30px 0 15px;
            color: #8bb9fe;
        }
        h4 {
            font-size: 1.3rem;
            margin: 25px 0 10px;
            color: #a3c8ff;
        }
        p {
            margin-bottom: 20px;
            font-size: 1.1rem;
            color: var(--text-primary);
        }
        .lead {
            font-size: 1.3rem;
            color: var(--accent-color);
            font-weight: 600;
            border-left: 4px solid var(--accent-color);
            padding-left: 20px;
            margin: 30px 0;
        }
        .highlight {
            background: rgba(15, 204, 206, 0.1);
            padding: 25px;
            border-radius: var(--radius);
            border: 1px solid rgba(15, 204, 206, 0.3);
            margin: 25px 0;
        }
        .reward-card {
            background: rgba(34, 34, 68, 0.7);
            border-radius: var(--radius);
            padding: 25px;
            margin: 25px 0;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .reward-card:hover {
            transform: translateY(-5px);
            border-color: var(--accent-color);
            box-shadow: 0 12px 25px rgba(0, 0, 0, 0.4);
        }
        .reward-header {
            display: flex;
            align-items: center;
            margin-bottom: 15px;
        }
        .reward-icon {
            font-size: 2rem;
            color: var(--accent-color);
            margin-right: 15px;
        }
        ul, ol {
            margin-left: 30px;
            margin-bottom: 25px;
        }
        li {
            margin-bottom: 10px;
            color: var(--text-primary);
        }
        blockquote {
            border-left: 4px solid var(--warning-color);
            padding-left: 25px;
            margin: 30px 0;
            font-style: italic;
            color: var(--text-secondary);
            background: rgba(255, 152, 0, 0.05);
            padding: 20px 25px;
            border-radius: 0 var(--radius) var(--radius) 0;
        }
        .image-container {
            margin: 30px 0;
            text-align: center;
        }
        .image-container img {
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            max-height: 500px;
            object-fit: cover;
            width: 100%;
        }
        .caption {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-top: 10px;
            font-style: italic;
        }
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin: 30px 0;
            background: rgba(34, 34, 68, 0.7);
            border-radius: var(--radius);
            overflow: hidden;
        }
        .comparison-table th {
            background: var(--secondary-color);
            color: var(--accent-color);
            padding: 18px;
            text-align: left;
            font-weight: 700;
        }
        .comparison-table td {
            padding: 15px 18px;
            border-bottom: 1px solid var(--border-color);
        }
        .comparison-table tr:hover {
            background: rgba(15, 204, 206, 0.1);
        }
        .cta-box {
            background: linear-gradient(135deg, var(--secondary-color) 0%, #1a1a2e 100%);
            border-radius: var(--radius);
            padding: 35px;
            text-align: center;
            margin: 40px 0;
            border: 2px solid var(--accent-color);
        }
        .cta-button {
            display: inline-block;
            background: var(--accent-color);
            color: var(--primary-color);
            padding: 15px 35px;
            border-radius: 50px;
            font-weight: 800;
            font-size: 1.1rem;
            margin-top: 20px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }
        .cta-button:hover {
            background: var(--accent-hover);
            transform: scale(1.05);
        }
        aside {
            position: sticky;
            top: calc(var(--header-height) + 20px);
            height: fit-content;
        }
        .sidebar-widget {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 25px;
            margin-bottom: 30px;
            border: 1px solid var(--border-color);
        }
        .sidebar-title {
            font-size: 1.4rem;
            margin-bottom: 20px;
            color: var(--accent-color);
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border-color);
        }
        .search-box {
            position: relative;
        }
        .search-box input {
            width: 100%;
            padding: 15px 20px 15px 50px;
            border-radius: 50px;
            border: 1px solid var(--border-color);
            background: rgba(26, 26, 46, 0.8);
            color: var(--text-primary);
            font-size: 1rem;
        }
        .search-box i {
            position: absolute;
            left: 20px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-secondary);
        }
        .toc ul {
            list-style: none;
            margin-left: 0;
        }
        .toc li {
            margin-bottom: 12px;
            padding-left: 15px;
            position: relative;
        }
        .toc li:before {
            content: '▸';
            position: absolute;
            left: 0;
            color: var(--accent-color);
        }
        .toc a {
            color: var(--text-primary);
        }
        .toc a:hover {
            color: var(--accent-color);
        }
        .interactive-section {
            margin: 40px 0;
        }
        .rating-widget {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 30px;
            text-align: center;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin: 20px 0;
        }
        .star {
            font-size: 2.5rem;
            color: var(--text-secondary);
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: var(--warning-color);
        }
        .comment-form {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 30px;
            margin-top: 30px;
        }
        .form-group {
            margin-bottom: 25px;
        }
        .form-group label {
            display: block;
            margin-bottom: 10px;
            color: var(--text-primary);
            font-weight: 600;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 15px;
            border-radius: var(--radius);
            border: 1px solid var(--border-color);
            background: rgba(26, 26, 46, 0.8);
            color: var(--text-primary);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--accent-color);
            box-shadow: 0 0 0 2px rgba(15, 204, 206, 0.2);
        }
        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        .submit-btn {
            background: var(--accent-color);
            color: var(--primary-color);
            padding: 15px 40px;
            border-radius: 50px;
            font-weight: 800;
            font-size: 1.1rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            display: inline-block;
        }
        .submit-btn:hover {
            background: var(--accent-hover);
            transform: translateY(-3px);
        }
        .longtail-links {
            background: var(--secondary-color);
            padding: 40px 0;
            margin-top: 60px;
        }
        .web-link {
            background: rgba(34, 34, 68, 0.7);
            border-radius: var(--radius);
            padding: 20px;
            margin-bottom: 15px;
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .web-link:hover {
            border-color: var(--accent-color);
            transform: translateX(10px);
        }
        .web-link a {
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
        }
        .web-link i {
            margin-right: 15px;
            color: var(--accent-color);
        }
        footer {
            background: var(--primary-color);
            padding: 40px 0 20px;
            border-top: 2px solid var(--border-color);
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-column h4 {
            color: var(--accent-color);
            margin-bottom: 25px;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 15px;
        }
        .footer-links a {
            color: var(--text-secondary);
        }
        .footer-links a:hover {
            color: var(--accent-color);
            padding-left: 5px;
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid var(--border-color);
            color: var(--text-secondary);
            font-size: 0.9rem;
        }
        @media (max-width: 1024px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            aside {
                position: static;
            }
            .footer-content {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .nav-links {
                position: fixed;
                top: var(--header-height);
                left: -100%;
                width: 100%;
                height: calc(100vh - var(--header-height));
                background: var(--secondary-color);
                flex-direction: column;
                align-items: center;
                padding-top: 40px;
                transition: var(--transition);
                z-index: 999;
            }
            .nav-links.active {
                left: 0;
            }
            .hamburger {
                display: block;
            }
            .form-row {
                grid-template-columns: 1fr;
            }
            .footer-content {
                grid-template-columns: 1fr;
            }
            .meta-info {
                flex-direction: column;
                gap: 10px;
                align-items: center;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 15px;
            }
            article, .sidebar-widget {
                padding: 25px 20px;
            }
            h1 {
                font-size: 1.9rem;
            }
            .cta-box {
                padding: 25px 20px;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .fade-in {
            animation: fadeIn 0.8s ease-out;
        }
        @media print {
            header, nav, aside, .longtail-links, footer, .interactive-section {
                display: none;
            }
            body {
                background: white;
                color: black;
            }
            article {
                box-shadow: none;
                padding: 0;
            }
        }