* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary-color: #2a4365;
            --secondary-color: #4299e1;
            --accent-color: #f6ad55;
            --dark-color: #1a202c;
            --light-color: #f7fafc;
            --text-color: #2d3748;
            --border-color: #e2e8f0;
            --success-color: #38a169;
            --warning-color: #dd6b20;
        }
        body {
            background-color: var(--light-color);
            color: var(--text-color);
            line-height: 1.6;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        a {
            color: var(--secondary-color);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: var(--accent-color);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--dark-color) 100%);
            color: white;
            padding: 1rem 0;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: 1px;
        }
        .logo a {
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo a:hover {
            color: var(--accent-color);
        }
        .logo-icon {
            color: var(--accent-color);
        }
        .nav-desktop {
            display: flex;
            gap: 1.5rem;
        }
        .nav-desktop a {
            color: white;
            font-weight: 500;
            padding: 0.5rem 1rem;
            border-radius: 4px;
        }
        .nav-desktop a:hover {
            background-color: rgba(255, 255, 255, 0.1);
            color: var(--accent-color);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background-color: var(--dark-color);
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            padding: 1rem;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            color: white;
            padding: 0.75rem 1rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .breadcrumb {
            background-color: var(--light-color);
            padding: 0.75rem 0;
            border-bottom: 1px solid var(--border-color);
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li {
            margin-right: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "/";
            margin-left: 0.5rem;
            color: var(--secondary-color);
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            padding: 2rem 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background-color: white;
            border-radius: 8px;
            padding: 2.5rem;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
        }
        h1 {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        h2 {
            font-size: 1.8rem;
            color: var(--primary-color);
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--border-color);
        }
        h3 {
            font-size: 1.4rem;
            color: var(--dark-color);
            margin: 2rem 0 1rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 500;
            color: var(--dark-color);
            background-color: #ebf8ff;
            padding: 1.5rem;
            border-left: 4px solid var(--secondary-color);
            border-radius: 4px;
            margin-bottom: 2rem;
        }
        .highlight {
            background-color: #fffaf0;
            padding: 1.5rem;
            border-radius: 6px;
            border-left: 4px solid var(--accent-color);
            margin: 2rem 0;
        }
        .highlight h4 {
            color: var(--warning-color);
            margin-bottom: 0.5rem;
        }
        .interactive-box {
            background: linear-gradient(135deg, #f6f9fc 0%, #edf2f7 100%);
            border-radius: 8px;
            padding: 2rem;
            margin: 2.5rem 0;
            border: 1px solid var(--border-color);
        }
        .interactive-box h3 {
            margin-top: 0;
            color: var(--primary-color);
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 500;
        }
        .form-control {
            width: 100%;
            padding: 0.75rem;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            font-size: 1rem;
            transition: border 0.3s ease;
        }
        .form-control:focus {
            outline: none;
            border-color: var(--secondary-color);
            box-shadow: 0 0 0 3px rgba(66, 153, 225, 0.1);
        }
        .btn {
            display: inline-block;
            background-color: var(--secondary-color);
            color: white;
            padding: 0.75rem 1.5rem;
            border: none;
            border-radius: 4px;
            font-weight: 600;
            cursor: pointer;
            transition: background-color 0.3s ease, transform 0.2s ease;
        }
        .btn:hover {
            background-color: #3182ce;
            transform: translateY(-2px);
        }
        .btn-accent {
            background-color: var(--accent-color);
        }
        .btn-accent:hover {
            background-color: #ed8936;
        }
        .rating {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .rating input {
            display: none;
        }
        .rating label {
            color: #ccc;
            font-size: 1.5rem;
            cursor: pointer;
            transition: color 0.3s ease;
        }
        .rating input:checked ~ label,
        .rating label:hover,
        .rating label:hover ~ label {
            color: #ffc107;
        }
        .featured-image {
            margin: 2.5rem 0;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: #718096;
            padding: 0.75rem;
            background-color: #f7fafc;
            border-top: 1px solid var(--border-color);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }
        .sidebar-widget {
            background-color: white;
            border-radius: 8px;
            padding: 1.5rem;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
        }
        .sidebar-widget h3 {
            margin-top: 0;
            color: var(--primary-color);
            font-size: 1.3rem;
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--border-color);
        }
        .related-links {
            list-style: none;
        }
        .related-links li {
            margin-bottom: 0.8rem;
            padding-bottom: 0.8rem;
            border-bottom: 1px solid var(--border-color);
        }
        .related-links li:last-child {
            margin-bottom: 0;
            padding-bottom: 0;
            border-bottom: none;
        }
        .related-links a {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .related-links i {
            color: var(--accent-color);
        }
        .footer-links {
            background-color: var(--dark-color);
            padding: 2.5rem 0;
        }
        .web-link {
            display: inline-block;
            margin: 0.5rem 1rem 0.5rem 0;
            padding: 0.5rem 1rem;
            background-color: rgba(255, 255, 255, 0.05);
            border-radius: 4px;
            transition: background-color 0.3s ease;
        }
        .web-link:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }
        .web-link a {
            color: #cbd5e0;
        }
        .footer-bottom {
            background-color: #0f1419;
            color: #a0aec0;
            padding: 1.5rem 0;
            text-align: center;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .nav-desktop {
                display: none;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .article-content {
                padding: 1.5rem;
            }
            .interactive-box {
                padding: 1.5rem;
            }
        }
        .text-center {
            text-align: center;
        }
        .mb-3 {
            margin-bottom: 1rem;
        }
        .mb-4 {
            margin-bottom: 1.5rem;
        }
        .mt-4 {
            margin-top: 1.5rem;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 0.3rem;
        }
        .keyword {
            background-color: #e6fffa;
            color: #234e52;
            padding: 0.2rem 0.4rem;
            border-radius: 3px;
            font-weight: 500;
        }