:root {
            --primary: #2a0a5e;
            --secondary: #ff6b00;
            --accent: #00c9ff;
            --light: #f8f9fa;
            --dark: #121212;
            --gray: #6c757d;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --radius: 8px;
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #fff;
            max-width: 100vw;
            overflow-x: hidden;
        }
        a {
            color: var(--secondary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary);
        }
        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%, #1a063a 100%);
            color: white;
            padding: 1rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .logo a {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: var(--accent);
        }
        .search-box {
            display: flex;
            flex: 0 1 400px;
        }
        .search-box input {
            flex-grow: 1;
            padding: 10px 15px;
            border: none;
            border-radius: var(--radius) 0 0 var(--radius);
            font-size: 1rem;
        }
        .search-box button {
            background: var(--secondary);
            color: white;
            border: none;
            padding: 0 20px;
            border-radius: 0 var(--radius) var(--radius) 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-box button:hover {
            background: #ff8533;
        }
        nav {
            background-color: rgba(255, 255, 255, 0.05);
            backdrop-filter: blur(10px);
            margin-top: 1rem;
            border-radius: var(--radius);
        }
        .nav-desktop {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            list-style: none;
        }
        .nav-desktop li {
            position: relative;
        }
        .nav-desktop a {
            color: white;
            padding: 15px 20px;
            display: block;
            font-weight: 500;
        }
        .nav-desktop a:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .nav-mobile {
            display: none;
            list-style: none;
            background-color: var(--primary);
            border-radius: var(--radius);
            margin-top: 10px;
            padding: 10px;
        }
        .nav-mobile.active {
            display: block;
        }
        .nav-mobile a {
            color: white;
            padding: 12px 15px;
            display: block;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .breadcrumb {
            padding: 15px 0;
            background-color: var(--light);
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "›";
            margin: 0 10px;
            color: var(--gray);
        }
        main {
            padding: 30px 0;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        .content-area {
            max-width: 100%;
        }
        article {
            margin-bottom: 40px;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary);
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary);
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid var(--secondary);
        }
        h3 {
            font-size: 1.5rem;
            color: #444;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.2rem;
            color: var(--gray);
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.25rem;
            font-weight: 500;
            color: #555;
            margin-bottom: 2rem;
            padding-left: 10px;
            border-left: 4px solid var(--accent);
        }
        .highlight {
            background-color: #fff9e6;
            padding: 25px;
            border-radius: var(--radius);
            border-left: 5px solid var(--secondary);
            margin: 2rem 0;
        }
        .term {
            font-weight: bold;
            color: var(--primary);
        }
        .feature-img {
            width: 100%;
            border-radius: var(--radius);
            margin: 2rem 0;
            box-shadow: var(--shadow);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            margin-top: 10px;
            font-size: 0.9rem;
        }
        ul, ol {
            margin-left: 2rem;
            margin-bottom: 1.5rem;
        }
        blockquote {
            border-left: 4px solid var(--accent);
            padding-left: 20px;
            margin: 2rem 0;
            font-style: italic;
            color: #555;
        }
        .interactive-box {
            background: linear-gradient(to right, var(--light), #e9ecef);
            padding: 25px;
            border-radius: var(--radius);
            margin: 2.5rem 0;
            box-shadow: var(--shadow);
        }
        .interactive-box h3 {
            margin-top: 0;
            color: var(--primary);
        }
        .rating {
            display: flex;
            align-items: center;
            gap: 10px;
            margin: 15px 0;
        }
        .stars {
            display: flex;
            gap: 5px;
        }
        .stars i {
            color: #ffc107;
            cursor: pointer;
            transition: var(--transition);
        }
        .stars i:hover {
            transform: scale(1.2);
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: var(--radius);
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(0, 201, 255, 0.2);
        }
        button[type="submit"] {
            background: var(--secondary);
            color: white;
            border: none;
            padding: 12px 30px;
            border-radius: var(--radius);
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        button[type="submit"]:hover {
            background: #ff8533;
            transform: translateY(-2px);
        }
        aside {
            background-color: var(--light);
            padding: 25px;
            border-radius: var(--radius);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar-widget {
            margin-bottom: 30px;
        }
        .sidebar-widget h3 {
            font-size: 1.3rem;
            margin-bottom: 1rem;
            color: var(--primary);
        }
        .related-links ul {
            list-style: none;
            margin-left: 0;
        }
        .related-links li {
            margin-bottom: 12px;
            padding-bottom: 12px;
            border-bottom: 1px dashed #ddd;
        }
        .related-links a:hover {
            color: var(--primary);
            padding-left: 5px;
        }
        footer {
            background-color: var(--dark);
            color: white;
            padding: 50px 0 20px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 15px;
            color: white;
        }
        .footer-links h4 {
            color: var(--accent);
            margin-bottom: 20px;
            font-size: 1.2rem;
        }
        .footer-links ul {
            list-style: none;
            margin-left: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #ccc;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: rgba(255, 255, 255, 0.05);
            padding: 25px;
            border-radius: var(--radius);
            margin: 30px 0;
        }
        friend-link h3 {
            color: var(--accent);
            margin-bottom: 20px;
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
        }
        .friend-links a {
            background-color: rgba(255, 255, 255, 0.1);
            padding: 8px 16px;
            border-radius: 20px;
            color: white;
            font-size: 0.9rem;
        }
        .friend-links a:hover {
            background-color: var(--secondary);
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #444;
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
            aside {
                position: static;
            }
            h1 {
                font-size: 2.3rem;
            }
            h2 {
                font-size: 1.8rem;
            }
        }
        @media (max-width: 768px) {
            .header-top {
                flex-direction: column;
                gap: 15px;
                align-items: stretch;
            }
            .search-box {
                flex: 1 1 100%;
            }
            .nav-desktop {
                display: none;
            }
            .hamburger {
                display: block;
                align-self: flex-end;
                margin-top: -50px;
            }
            .nav-mobile {
                display: none;
            }
            .friend-links {
                justify-content: center;
            }
        }
        @media (max-width: 576px) {
            .container {
                padding: 0 15px;
            }
            h1 {
                font-size: 1.9rem;
            }
            .interactive-box {
                padding: 20px;
            }
        }