:root {
            --primary-color: #1a237e;
            --secondary-color: #e53935;
            --accent-color: #ff9800;
            --light-bg: #f5f5f7;
            --dark-text: #212121;
            --light-text: #757575;
            --border-color: #e0e0e0;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--dark-text);
            background-color: #fff;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: var(--primary-color);
            color: white;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .logo {
            font-size: 2.2rem;
            font-weight: 800;
            text-decoration: none;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo span {
            color: var(--accent-color);
        }
        .logo i {
            font-size: 2.5rem;
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        .nav-links a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            transition: var(--transition);
            padding: 8px 12px;
            border-radius: 4px;
        }
        .nav-links a:hover {
            background-color: rgba(255,255,255,0.15);
            color: var(--accent-color);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 5px;
        }
        .breadcrumb {
            background-color: rgba(255,255,255,0.1);
            padding: 12px 0;
            margin-bottom: 0;
        }
        .breadcrumb ul {
            display: flex;
            list-style: none;
            gap: 10px;
            flex-wrap: wrap;
        }
        .breadcrumb li {
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: #ddd;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            color: var(--accent-color);
        }
        .breadcrumb i {
            margin: 0 8px;
            font-size: 0.8rem;
        }
        main {
            padding: 40px 0;
            background-color: var(--light-bg);
        }
        .article-container {
            background-color: white;
            border-radius: 12px;
            padding: 40px;
            box-shadow: var(--shadow);
            margin-bottom: 40px;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-color);
            margin-bottom: 20px;
            line-height: 1.2;
        }
        h2 {
            font-size: 2.2rem;
            color: var(--primary-color);
            margin: 40px 0 20px;
            padding-bottom: 10px;
            border-bottom: 3px solid var(--accent-color);
        }
        h3 {
            font-size: 1.8rem;
            color: var(--secondary-color);
            margin: 30px 0 15px;
        }
        h4 {
            font-size: 1.4rem;
            color: var(--primary-color);
            margin: 25px 0 12px;
        }
        p {
            margin-bottom: 20px;
            font-size: 1.1rem;
        }
        .intro {
            font-size: 1.3rem;
            color: var(--dark-text);
            background-color: #f0f7ff;
            padding: 25px;
            border-left: 5px solid var(--primary-color);
            border-radius: 8px;
            margin-bottom: 30px;
        }
        .highlight {
            background-color: #fff8e1;
            padding: 25px;
            border-radius: 8px;
            margin: 25px 0;
            border-left: 5px solid var(--accent-color);
        }
        .highlight strong {
            color: var(--secondary-color);
        }
        .emoji {
            font-size: 1.5rem;
            margin-right: 8px;
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
            margin: 40px 0;
        }
        .feature-card {
            background-color: #f9f9f9;
            padding: 25px;
            border-radius: 10px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow);
            border-color: var(--accent-color);
        }
        .feature-card i {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 15px;
        }
        .image-container {
            margin: 35px 0;
            text-align: center;
        }
        .article-img {
            max-width: 100%;
            height: auto;
            border-radius: 10px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-color);
        }
        figcaption {
            font-style: italic;
            color: var(--light-text);
            margin-top: 10px;
            font-size: 0.95rem;
        }
        .interactive-section {
            background-color: #f8f9fa;
            border-radius: 10px;
            padding: 30px;
            margin: 40px 0;
            border: 1px solid var(--border-color);
        }
        .interactive-section h3 {
            margin-top: 0;
        }
        .form-group {
            margin-bottom: 20px;
        }
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--dark-text);
        }
        input, textarea, select {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(26, 35, 126, 0.1);
        }
        button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 14px 28px;
            border-radius: 6px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        button:hover {
            background-color: var(--secondary-color);
            transform: translateY(-2px);
        }
        .rating {
            display: flex;
            align-items: center;
            gap: 10px;
            margin: 20px 0;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover, .star.active {
            color: var(--accent-color);
        }
        .comments-section {
            margin-top: 50px;
        }
        .comment {
            background-color: #f9f9f9;
            padding: 20px;
            border-radius: 8px;
            margin-bottom: 20px;
            border-left: 4px solid var(--border-color);
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 10px;
            font-size: 0.9rem;
            color: var(--light-text);
        }
        .web-links {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 15px;
            margin: 40px 0;
        }
        .web-link {
            background-color: #f0f7ff;
            padding: 15px;
            border-radius: 6px;
            border: 1px solid #bbdefb;
        }
        .web-link a {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition);
        }
        .web-link a:hover {
            color: var(--secondary-color);
            text-decoration: underline;
        }
        footer {
            background-color: #0d153a;
            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-section h3 {
            color: white;
            margin-bottom: 20px;
            font-size: 1.5rem;
        }
        .footer-section a {
            color: #ddd;
            text-decoration: none;
            display: block;
            margin-bottom: 12px;
            transition: var(--transition);
        }
        .footer-section a:hover {
            color: var(--accent-color);
            padding-left: 5px;
        }
        .copyright {
            text-align: center;
            padding-top: 25px;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 1024px) {
            h1 {
                font-size: 2.4rem;
            }
            h2 {
                font-size: 2rem;
            }
        }
        @media (max-width: 768px) {
            .header-top {
                flex-direction: column;
                align-items: flex-start;
                gap: 15px;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                gap: 0;
                margin-top: 15px;
            }
            .nav-links.active {
                display: flex;
            }
            .nav-links li {
                width: 100%;
            }
            .nav-links a {
                display: block;
                padding: 15px;
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
            .hamburger {
                display: block;
                position: absolute;
                top: 20px;
                right: 20px;
            }
            .article-container {
                padding: 25px;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            .intro {
                font-size: 1.1rem;
                padding: 20px;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 15px;
            }
            h1 {
                font-size: 1.8rem;
            }
            .article-container {
                padding: 20px;
            }
            .interactive-section {
                padding: 20px;
            }
            .web-links {
                grid-template-columns: 1fr;
            }
        }