* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #1a365d;
            --secondary-color: #e53e3e;
            --accent-color: #2d3748;
            --text-color: #2d3748;
            --light-bg: #f7fafc;
            --white: #ffffff;
            --gray-light: #edf2f7;
            --gray-medium: #a0aec0;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
            --border-radius: 8px;
            --max-width: 1200px;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-color);
            background-color: var(--light-bg);
            overflow-x: hidden;
        }
        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary-color);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: var(--white);
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary-color);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--secondary-color);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 30px;
        }
        .nav-links {
            display: flex;
            gap: 25px;
            list-style: none;
        }
        .nav-links a {
            font-weight: 600;
            padding: 8px 0;
            position: relative;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--secondary-color);
            transition: var(--transition);
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .search-box {
            display: flex;
            align-items: center;
            background-color: var(--gray-light);
            border-radius: 50px;
            padding: 8px 15px;
            width: 250px;
        }
        .search-box input {
            border: none;
            background: transparent;
            width: 100%;
            padding: 5px 10px;
            outline: none;
        }
        .search-box button {
            background: transparent;
            border: none;
            color: var(--primary-color);
            cursor: pointer;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: var(--primary-color);
        }
        .breadcrumb {
            background-color: var(--gray-light);
            padding: 15px 0;
            margin-bottom: 30px;
        }
        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 10px;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb-nav li {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .breadcrumb-nav a {
            color: var(--gray-medium);
        }
        .breadcrumb-nav .active {
            color: var(--primary-color);
            font-weight: 600;
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            margin: 40px 0;
        }
        .main-content {
            background-color: var(--white);
            border-radius: var(--border-radius);
            padding: 40px;
            box-shadow: var(--shadow);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .sidebar-widget {
            background-color: var(--white);
            border-radius: var(--border-radius);
            padding: 25px;
            box-shadow: var(--shadow);
        }
        .widget-title {
            font-size: 1.3rem;
            color: var(--primary-color);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--gray-light);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-color);
            margin-bottom: 25px;
            line-height: 1.2;
        }
        h2 {
            font-size: 2.2rem;
            color: var(--primary-color);
            margin: 40px 0 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--gray-light);
        }
        h3 {
            font-size: 1.8rem;
            color: var(--accent-color);
            margin: 30px 0 15px;
        }
        h4 {
            font-size: 1.4rem;
            color: var(--accent-color);
            margin: 25px 0 12px;
        }
        p {
            margin-bottom: 20px;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 500;
            color: var(--accent-color);
            margin-bottom: 30px;
        }
        .highlight {
            background-color: rgba(229, 62, 62, 0.1);
            padding: 25px;
            border-left: 4px solid var(--secondary-color);
            margin: 30px 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .key-point {
            display: flex;
            align-items: flex-start;
            gap: 15px;
            margin: 20px 0;
            padding: 15px;
            background-color: var(--light-bg);
            border-radius: var(--border-radius);
        }
        .key-point i {
            color: var(--secondary-color);
            margin-top: 5px;
            flex-shrink: 0;
        }
        .interactive-section {
            background: linear-gradient(135deg, #f6f9fc 0%, #e9f2f9 100%);
            border-radius: var(--border-radius);
            padding: 30px;
            margin: 40px 0;
            border: 1px solid #e2e8f0;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
        }
        .form-control {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #cbd5e0;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(26, 54, 93, 0.1);
        }
        .btn {
            display: inline-block;
            background-color: var(--primary-color);
            color: white;
            padding: 12px 30px;
            border: none;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            text-align: center;
        }
        .btn:hover {
            background-color: var(--secondary-color);
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
        }
        .rating-stars {
            display: flex;
            gap: 5px;
            margin: 10px 0;
        }
        .rating-stars i {
            color: #e2e8f0;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-stars i:hover,
        .rating-stars i.active {
            color: #f6ad55;
        }
        .related-links {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 20px;
            margin: 40px 0;
        }
        .link-card {
            background-color: var(--white);
            border-radius: var(--border-radius);
            padding: 20px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid #e2e8f0;
        }
        .link-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
            border-color: var(--secondary-color);
        }
        .article-image {
            margin: 30px 0;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            position: relative;
        }
        .image-caption {
            padding: 15px;
            background-color: var(--light-bg);
            font-style: italic;
            color: var(--gray-medium);
            text-align: center;
            border-top: 1px solid #e2e8f0;
        }
        footer {
            background-color: var(--primary-color);
            color: white;
            padding: 60px 0 30px;
            margin-top: 60px;
        }
        .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: 20px;
            display: block;
            color: white;
        }
        .footer-links h3 {
            color: white;
            border-bottom: 2px solid rgba(255, 255, 255, 0.2);
            padding-bottom: 10px;
            margin-bottom: 20px;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #cbd5e0;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: rgba(255, 255, 255, 0.1);
            padding: 20px;
            border-radius: var(--border-radius);
            margin: 20px 0;
            border-left: 4px solid var(--secondary-color);
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.2);
            color: #cbd5e0;
            font-size: 0.9rem;
        }
        @media (max-width: 1024px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
            .related-links {
                grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            }
        }
        @media (max-width: 768px) {
            .main-nav {
                position: fixed;
                top: 80px;
                left: -100%;
                width: 100%;
                background-color: var(--white);
                flex-direction: column;
                padding: 30px;
                box-shadow: var(--shadow);
                transition: var(--transition);
                z-index: 999;
            }
            .main-nav.active {
                left: 0;
            }
            .nav-links {
                flex-direction: column;
                width: 100%;
                gap: 0;
            }
            .nav-links li {
                width: 100%;
                border-bottom: 1px solid var(--gray-light);
            }
            .nav-links a {
                display: block;
                padding: 15px 0;
            }
            .search-box {
                width: 100%;
                margin-top: 20px;
            }
            .hamburger {
                display: block;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            .main-content {
                padding: 25px;
            }
            .header-content {
                padding: 15px 0;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 15px;
            }
            .main-content {
                padding: 20px;
            }
            .sidebar-widget {
                padding: 20px;
            }
            .btn {
                width: 100%;
            }
            .footer-content {
                grid-template-columns: 1fr;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .fade-in {
            animation: fadeIn 0.6s ease-out;
        }
        .text-center { text-align: center; }
        .mt-20 { margin-top: 20px; }
        .mt-30 { margin-top: 30px; }
        .mt-40 { margin-top: 40px; }
        .mb-20 { margin-bottom: 20px; }
        .mb-30 { margin-bottom: 30px; }
        .mb-40 { margin-bottom: 40px; }
        .bold { font-weight: 700; }
        .italic { font-style: italic; }
        .emoji { font-size: 1.2em; margin-right: 5px; }