:root {
            --primary-dark: #0a2f5a;
            --primary-main: #1e6bc4;
            --primary-light: #4a90e2;
            --accent-gold: #f5b642;
            --accent-green: #2ecc71;
            --neutral-dark: #222831;
            --neutral-mid: #393e46;
            --neutral-light: #f7f7f7;
            --text-primary: #333333;
            --text-secondary: #555555;
            --border-radius: 12px;
            --box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
            --transition: all 0.3s ease;
            --max-width: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: #ffffff;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-main) 100%);
            color: white;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 20px;
        }
        .my-logo {
            font-family: 'Trebuchet MS', sans-serif;
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
        }
        .my-logo:hover {
            color: var(--accent-gold);
            transform: scale(1.02);
        }
        .my-logo i {
            color: var(--accent-gold);
            font-size: 1.6rem;
        }
        .main-nav {
            display: flex;
            align-items: center;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .nav-list a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 0.75rem;
            border-radius: 6px;
            transition: var(--transition);
            position: relative;
        }
        .nav-list a:hover {
            background-color: rgba(255, 255, 255, 0.15);
            color: var(--accent-gold);
        }
        .nav-list a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--accent-gold);
            transition: width 0.3s ease;
        }
        .nav-list a:hover::after {
            width: 100%;
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .breadcrumb {
            background-color: var(--neutral-light);
            padding: 0.8rem 20px;
            border-bottom: 1px solid #eaeaea;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--primary-main);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: var(--text-secondary);
            margin: 0 5px;
        }
        .main-content {
            padding: 2.5rem 0;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
        }
        article {
            background: white;
            padding: 2rem;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
        }
        .article-header {
            margin-bottom: 2.5rem;
            border-bottom: 3px solid var(--primary-light);
            padding-bottom: 1.5rem;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-dark);
            line-height: 1.2;
            margin-bottom: 1rem;
        }
        .article-meta {
            display: flex;
            gap: 1.5rem;
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-bottom: 1rem;
        }
        .article-meta i {
            margin-right: 0.5rem;
            color: var(--primary-main);
        }
        .featured-image {
            width: 100%;
            height: 400px;
            object-fit: cover;
            border-radius: var(--border-radius);
            margin: 2rem 0;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
            transition: transform 0.5s ease;
        }
        .featured-image:hover {
            transform: scale(1.005);
        }
        .content-section {
            margin-bottom: 3rem;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary-main);
            margin: 2rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent-gold);
        }
        h3 {
            font-size: 1.5rem;
            color: var(--neutral-dark);
            margin: 1.8rem 0 1rem;
        }
        h4 {
            font-size: 1.2rem;
            color: var(--neutral-mid);
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .highlight {
            background-color: rgba(74, 144, 226, 0.1);
            border-left: 4px solid var(--primary-main);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .stat-card {
            background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-main) 100%);
            color: white;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            text-align: center;
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
            transition: var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 20px rgba(0, 0, 0, 0.15);
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            margin-bottom: 0.5rem;
        }
        .stat-label {
            font-size: 1rem;
            opacity: 0.9;
        }
        .interactive-features {
            background-color: var(--neutral-light);
            padding: 2rem;
            border-radius: var(--border-radius);
            margin: 3rem 0;
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.5rem;
            margin-top: 1.5rem;
        }
        .feature-card {
            background: white;
            padding: 1.8rem;
            border-radius: var(--border-radius);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            transition: var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
        }
        .feature-card i {
            font-size: 2.5rem;
            color: var(--primary-main);
            margin-bottom: 1rem;
        }
        form {
            margin-top: 1.5rem;
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--neutral-dark);
        }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 1px solid #ddd;
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--primary-main);
            box-shadow: 0 0 0 3px rgba(30, 107, 196, 0.2);
        }
        .rating-stars {
            display: flex;
            gap: 0.5rem;
            margin-bottom: 1rem;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
            margin: 0;
        }
        .rating-stars input:checked ~ label,
        .rating-stars label:hover,
        .rating-stars label:hover ~ label {
            color: var(--accent-gold);
        }
        button {
            background: linear-gradient(135deg, var(--primary-main) 0%, var(--primary-dark) 100%);
            color: white;
            border: none;
            padding: 0.9rem 2rem;
            border-radius: 8px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        button:hover {
            background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-main) 100%);
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(30, 107, 196, 0.3);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background: white;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
        }
        .sidebar-widget h3 {
            font-size: 1.3rem;
            margin-top: 0;
            color: var(--primary-dark);
            padding-bottom: 0.8rem;
            border-bottom: 2px solid var(--accent-gold);
        }
        .search-widget form {
            display: flex;
            margin-top: 1rem;
        }
        .search-widget input {
            flex-grow: 1;
            border-radius: 8px 0 0 8px;
        }
        .search-widget button {
            border-radius: 0 8px 8px 0;
            padding: 0.8rem 1.5rem;
        }
        .related-links ul {
            list-style: none;
        }
        .related-links li {
            margin-bottom: 0.8rem;
            padding-bottom: 0.8rem;
            border-bottom: 1px dashed #eee;
        }
        .related-links a {
            color: var(--primary-main);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            transition: var(--transition);
        }
        .related-links a:hover {
            color: var(--primary-dark);
            padding-left: 5px;
        }
        .related-links a i {
            color: var(--accent-gold);
        }
        .site-footer {
            background: var(--primary-dark);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2rem;
        }
        .footer-section h4 {
            color: var(--accent-gold);
            font-size: 1.2rem;
            margin-bottom: 1.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.2);
            padding-bottom: 0.5rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #cccccc;
            text-decoration: none;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.05);
            padding: 1rem;
            border-radius: 8px;
            margin-bottom: 1rem;
            transition: var(--transition);
        }
        friend-link:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateX(5px);
        }
        friend-link a {
            color: var(--accent-gold) !important;
            font-weight: 600;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #aaaaaa;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
            .sidebar {
                order: -1;
            }
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            h3 {
                font-size: 1.3rem;
            }
            .header-container {
                flex-wrap: wrap;
            }
            .main-nav {
                width: 100%;
                order: 3;
                margin-top: 1rem;
                display: none;
            }
            .nav-list {
                flex-direction: column;
                gap: 0.5rem;
                width: 100%;
            }
            .nav-list li {
                width: 100%;
            }
            .nav-list a {
                display: block;
                padding: 0.8rem 1rem;
                border-radius: 8px;
                background-color: rgba(255, 255, 255, 0.05);
            }
            .mobile-toggle {
                display: block;
            }
            .nav-active {
                display: block;
            }
            .featured-image {
                height: 250px;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .article-meta {
                flex-wrap: wrap;
                gap: 0.8rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 15px;
            }
            article, .sidebar-widget {
                padding: 1.5rem;
            }
            h1 {
                font-size: 1.8rem;
            }
            .stat-number {
                font-size: 2rem;
            }
            button {
                width: 100%;
                justify-content: center;
            }
        }
        .text-bold {
            font-weight: 800;
            color: var(--primary-dark);
        }
        .text-italic {
            font-style: italic;
            color: var(--text-secondary);
        }
        .text-center {
            text-align: center;
        }
        .emoji {
            font-size: 1.2em;
            margin: 0 0.2em;
        }
        .link-inline {
            color: var(--primary-main);
            text-decoration: none;
            font-weight: 600;
            border-bottom: 1px dotted var(--primary-main);
            transition: var(--transition);
        }
        .link-inline:hover {
            color: var(--primary-dark);
            border-bottom-style: solid;
        }
        .visually-hidden {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }