* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f9f9f9;
            max-width: 100vw;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        ul, ol {
            list-style-position: inside;
            margin: 1em 0;
        }
        :root {
            --primary-color: #0d4a7c;
            --secondary-color: #d32f2f;
            --accent-color: #ff9800;
            --light-color: #f0f7ff;
            --dark-color: #1a2b3c;
            --text-color: #444;
            --border-color: #ddd;
            --shadow: 0 4px 12px rgba(0,0,0,0.08);
            --transition: all 0.3s ease;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .text-center { text-align: center; }
        .bold { font-weight: 700; }
        .highlight { background-color: #fffacd; padding: 0 5px; }
        .emoji { margin-right: 5px; }
        .header {
            background-color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            padding: 15px 0;
            border-bottom: 1px solid var(--border-color);
        }
        .logo {
            font-size: 2.2rem;
            font-weight: 900;
            color: var(--primary-color);
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .logo span {
            color: var(--secondary-color);
        }
        .search-form {
            max-width: 400px;
            margin: 0 auto;
        }
        .search-box {
            display: flex;
            border: 2px solid var(--primary-color);
            border-radius: 50px;
            overflow: hidden;
        }
        .search-box input {
            flex: 1;
            padding: 12px 20px;
            border: none;
            font-size: 1rem;
        }
        .search-box button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 25px;
            cursor: pointer;
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .search-box button:hover {
            background-color: var(--secondary-color);
        }
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 10px 0;
        }
        .main-nav ul {
            display: flex;
            gap: 30px;
        }
        .main-nav a {
            font-weight: 600;
            color: var(--dark-color);
            padding: 5px 0;
            position: relative;
            transition: var(--transition);
        }
        .main-nav a:hover,
        .main-nav a.active {
            color: var(--secondary-color);
        }
        .main-nav a:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--secondary-color);
            transition: width 0.3s;
        }
        .main-nav a:hover:after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: var(--primary-color);
        }
        .breadcrumb {
            padding: 15px 0;
            background-color: var(--light-color);
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .breadcrumb li:not(:last-child):after {
            content: '>';
            margin-left: 10px;
            color: #777;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 40px 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background-color: white;
            padding: 40px;
            border-radius: 10px;
            box-shadow: var(--shadow);
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 30px;
            padding-bottom: 15px;
            border-bottom: 1px solid var(--border-color);
            font-size: 0.95rem;
            color: #666;
        }
        .article-meta i {
            margin-right: 5px;
            color: var(--accent-color);
        }
        h1 {
            color: var(--primary-color);
            font-size: 2.5rem;
            line-height: 1.2;
            margin-bottom: 1.5rem;
        }
        h2 {
            color: var(--dark-color);
            font-size: 1.8rem;
            margin: 2.5rem 0 1rem;
            padding-bottom: 10px;
            border-bottom: 2px dashed var(--border-color);
        }
        h3 {
            color: var(--secondary-color);
            font-size: 1.4rem;
            margin: 1.8rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            color: var(--text-color);
            text-align: justify;
        }
        .featured-img {
            margin: 30px 0;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .featured-img figcaption {
            text-align: center;
            font-style: italic;
            padding: 10px;
            color: #666;
            background-color: #f5f5f5;
        }
        .sidebar {
            background-color: white;
            padding: 25px;
            border-radius: 10px;
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 100px;
        }
        .sidebar h3 {
            font-size: 1.3rem;
            margin-top: 0;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--primary-color);
        }
        .sidebar-widget {
            margin-bottom: 30px;
        }
        .quick-links ul li {
            margin-bottom: 12px;
            padding-left: 20px;
            position: relative;
        }
        .quick-links ul li:before {
            content: '▶';
            position: absolute;
            left: 0;
            color: var(--secondary-color);
            font-size: 0.8rem;
        }
        .user-interaction {
            background-color: white;
            padding: 40px;
            margin: 40px 0;
            border-radius: 10px;
            box-shadow: var(--shadow);
        }
        .interaction-title {
            font-size: 1.8rem;
            color: var(--primary-color);
            margin-bottom: 30px;
            text-align: center;
        }
        .form-group {
            margin-bottom: 25px;
        }
        .form-label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--dark-color);
        }
        .form-control {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid var(--border-color);
            border-radius: 5px;
            font-size: 1rem;
            transition: border-color 0.3s;
        }
        .form-control:focus {
            outline: none;
            border-color: var(--primary-color);
        }
        textarea.form-control {
            min-height: 150px;
            resize: vertical;
        }
        .rating {
            display: flex;
            gap: 10px;
            align-items: center;
            flex-wrap: wrap;
        }
        .star {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: var(--accent-color);
        }
        .btn-submit {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 15px 40px;
            font-size: 1.1rem;
            border-radius: 50px;
            cursor: pointer;
            display: block;
            margin: 30px auto 0;
            transition: var(--transition);
        }
        .btn-submit:hover {
            background-color: var(--secondary-color);
            transform: translateY(-3px);
            box-shadow: 0 7px 15px rgba(0,0,0,0.1);
        }
        .web-links-section {
            background-color: var(--light-color);
            padding: 40px 0;
            margin-top: 40px;
        }
        .web-links-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 15px;
        }
        .web-link {
            background-color: white;
            padding: 15px;
            border-radius: 5px;
            border-left: 4px solid var(--primary-color);
            box-shadow: 0 2px 5px rgba(0,0,0,0.05);
            transition: var(--transition);
        }
        .web-link:hover {
            border-left-color: var(--secondary-color);
            transform: translateX(5px);
        }
        .footer {
            background-color: var(--dark-color);
            color: white;
            padding: 50px 0 20px;
        }
        .footer-links {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 30px;
            margin-bottom: 40px;
        }
        .footer-col h4 {
            color: white;
            font-size: 1.2rem;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col a {
            color: #ccc;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: white;
            padding-left: 5px;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .header-top .container {
                flex-direction: column;
                gap: 20px;
            }
            .hamburger {
                display: block;
            }
            .main-nav {
                position: fixed;
                top: 0;
                left: -100%;
                width: 80%;
                max-width: 300px;
                height: 100vh;
                background-color: white;
                padding: 80px 30px 30px;
                box-shadow: 5px 0 15px rgba(0,0,0,0.1);
                transition: left 0.4s ease;
                z-index: 999;
            }
            .main-nav.active {
                left: 0;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 20px;
            }
            .close-nav {
                position: absolute;
                top: 20px;
                right: 20px;
                font-size: 1.5rem;
                cursor: pointer;
                color: var(--primary-color);
            }
            .article-content {
                padding: 25px;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .sidebar {
                position: static;
            }
        }
        @media print {
            .header, .sidebar, .user-interaction, .web-links-section, .footer {
                display: none;
            }
            .article-content {
                box-shadow: none;
                padding: 0;
            }
        }