* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        body {
            background-color: #f8f9fa;
            color: #333;
            line-height: 1.7;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: #2c5282;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #1a365d;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul, ol {
            padding-left: 1.5em;
            margin-bottom: 1.5em;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #1a365d 0%, #2c5282 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;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: #e53e3e;
        }
        .my-logo:hover {
            text-decoration: none;
            color: #fff;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: #e2e8f0;
            font-weight: 600;
            padding: 0.5rem 0;
            border-bottom: 2px solid transparent;
        }
        .main-nav a:hover,
        .main-nav a.active {
            color: white;
            border-bottom-color: #e53e3e;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: #edf2f7;
            padding: 0.8rem 0;
            font-size: 0.9rem;
            margin-bottom: 2rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            padding-left: 0;
            margin: 0;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "›";
            margin: 0 10px;
            color: #718096;
        }
        .breadcrumb a {
            color: #4a5568;
        }
        main {
            padding: 2rem 0;
            background: white;
            border-radius: 8px;
            box-shadow: 0 2px 15px rgba(0,0,0,0.05);
            margin-bottom: 2rem;
        }
        .article-header {
            text-align: center;
            padding-bottom: 2rem;
            border-bottom: 2px solid #e2e8f0;
            margin-bottom: 3rem;
        }
        h1 {
            font-size: 2.8rem;
            color: #1a365d;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .article-meta {
            color: #718096;
            font-size: 0.95rem;
            margin-bottom: 1.5rem;
        }
        .article-meta i {
            margin-right: 5px;
        }
        h2 {
            font-size: 2rem;
            color: #2d3748;
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid #cbd5e0;
        }
        h3 {
            font-size: 1.6rem;
            color: #4a5568;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #5a67d8;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5em;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            color: #2d3748;
            font-weight: 500;
            margin-bottom: 2em;
            line-height: 1.8;
        }
        .highlight-box {
            background-color: #fef3c7;
            border-left: 5px solid #d97706;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .img-container {
            margin: 2.5rem auto;
            text-align: center;
            max-width: 800px;
        }
        .img-container img {
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            border: 1px solid #e2e8f0;
        }
        .img-caption {
            font-size: 0.9rem;
            color: #718096;
            margin-top: 0.5rem;
            font-style: italic;
        }
        blockquote {
            border-left: 4px solid #5a67d8;
            padding-left: 1.5rem;
            margin: 2rem 0;
            color: #4a5568;
            font-style: italic;
        }
        .interaction-section {
            background: #f7fafc;
            border-radius: 10px;
            padding: 2rem;
            margin: 3rem 0;
            border: 1px solid #e2e8f0;
        }
        .section-title {
            font-size: 1.5rem;
            color: #2d3748;
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #4a5568;
        }
        .form-control {
            width: 100%;
            padding: 0.75rem 1rem;
            border: 1px solid #cbd5e0;
            border-radius: 6px;
            font-size: 1rem;
            transition: border-color 0.3s;
        }
        .form-control:focus {
            outline: none;
            border-color: #5a67d8;
            box-shadow: 0 0 0 3px rgba(90, 103, 216, 0.1);
        }
        .btn {
            background: linear-gradient(to right, #2c5282, #1a365d);
            color: white;
            padding: 0.75rem 2rem;
            border: none;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn:hover {
            background: linear-gradient(to right, #1a365d, #2c5282);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(26, 54, 93, 0.2);
            text-decoration: none;
        }
        .rating-stars {
            display: flex;
            gap: 10px;
            margin-bottom: 1rem;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            font-size: 2rem;
            color: #cbd5e0;
            cursor: pointer;
            transition: color 0.2s;
        }
        .rating-stars input:checked ~ label,
        .rating-stars label:hover,
        .rating-stars label:hover ~ label {
            color: #f6ad55;
        }
        footer {
            background-color: #1a202c;
            color: #cbd5e0;
            padding: 3rem 0 1.5rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h4 {
            color: #e2e8f0;
            font-size: 1.2rem;
            margin-bottom: 1.2rem;
            border-bottom: 2px solid #2d3748;
            padding-bottom: 0.5rem;
        }
        .footer-links {
            list-style: none;
            padding-left: 0;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #a0aec0;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
            transition: all 0.3s;
        }
        friend-link {
            display: block;
            margin: 1rem 0;
            padding: 0.8rem;
            background: #2d3748;
            border-radius: 6px;
            border-left: 4px solid #5a67d8;
        }
        friend-link a {
            color: #e2e8f0;
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #2d3748;
            color: #a0aec0;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.8rem; }
            .main-nav ul { gap: 1.2rem; }
        }
        @media (max-width: 768px) {
            .header-container { flex-wrap: wrap; }
            .hamburger {
                display: block;
                order: 1;
            }
            .my-logo {
                order: 0;
                flex: 1;
            }
            .main-nav {
                order: 2;
                flex-basis: 100%;
                margin-top: 1rem;
                display: none;
            }
            .main-nav.active {
                display: block;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
            }
            .main-nav li {
                border-bottom: 1px solid #2c5282;
            }
            .main-nav a {
                display: block;
                padding: 0.8rem 0;
            }
            .interaction-section {
                padding: 1.5rem;
            }
        }
        @media (max-width: 480px) {
            .container { padding: 0 15px; }
            h1 { font-size: 2rem; }
            .btn { width: 100%; justify-content: center; }
        }