* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: #333;
            background-color: #f8f9fa;
            max-width: 100vw;
            overflow-x: hidden;
        }
        a {
            color: #2c3e50;
            text-decoration: none;
            transition: all 0.3s ease;
        }
        a:hover {
            color: #e74c3c;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul, ol {
            padding-left: 2rem;
        }
        .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: 0.2rem 0.5rem;
            border-radius: 3px;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        header {
            background: linear-gradient(135deg, #2c3e50, #4a6491);
            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;
        }
        .logo a {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            display: flex;
            align-items: center;
        }
        .logo i {
            margin-right: 10px;
            color: #e74c3c;
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
        }
        .nav-links li {
            margin-left: 2rem;
        }
        .nav-links a {
            color: white;
            font-weight: 600;
            font-size: 1.1rem;
        }
        .nav-links a:hover {
            color: #f1c40f;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: white;
        }
        .breadcrumb {
            background: #ecf0f1;
            padding: 1rem 0;
            font-size: 0.95rem;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
        }
        .breadcrumb li {
            margin-right: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "›";
            margin-left: 0.5rem;
            color: #7f8c8d;
        }
        .breadcrumb a {
            color: #3498db;
        }
        .search-container {
            background: #34495e;
            padding: 1.5rem 0;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-input {
            flex: 1;
            padding: 0.8rem 1rem;
            border: none;
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }
        .search-btn {
            background: #e74c3c;
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s;
        }
        .search-btn:hover {
            background: #c0392b;
        }
        main {
            padding: 2rem 0;
            background: white;
        }
        article {
            margin-bottom: 3rem;
        }
        h1 {
            font-size: 2.8rem;
            color: #2c3e50;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid #e74c3c;
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 2.2rem;
            color: #2980b9;
            margin: 2.5rem 0 1.2rem;
            padding-top: 1rem;
        }
        h3 {
            font-size: 1.8rem;
            color: #16a085;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.5rem;
            color: #8e44ad;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .article-img {
            margin: 2rem auto;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 6px 15px rgba(0,0,0,0.1);
            max-width: 800px;
        }
        .article-img img {
            width: 100%;
        }
        .caption {
            text-align: center;
            font-style: italic;
            color: #7f8c8d;
            padding: 0.5rem;
            background: #f9f9f9;
        }
        .content-link {
            color: #3498db;
            border-bottom: 1px dashed #3498db;
        }
        .content-link:hover {
            color: #e74c3c;
            border-bottom: 1px solid #e74c3c;
        }
        .user-interaction {
            background: #f8f9fa;
            border-left: 5px solid #3498db;
            padding: 1.5rem;
            margin: 2.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .interaction-title {
            font-size: 1.5rem;
            color: #2c3e50;
            margin-bottom: 1rem;
        }
        .rating {
            display: flex;
            align-items: center;
            margin-bottom: 1.5rem;
        }
        .stars {
            color: #f1c40f;
            font-size: 1.8rem;
            margin-right: 1rem;
        }
        .stars i {
            cursor: pointer;
            transition: transform 0.2s;
        }
        .stars i:hover {
            transform: scale(1.2);
        }
        .comment-form textarea {
            width: 100%;
            padding: 1rem;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-family: inherit;
            font-size: 1rem;
            margin-bottom: 1rem;
            resize: vertical;
            min-height: 120px;
        }
        .submit-btn {
            background: #2ecc71;
            color: white;
            border: none;
            padding: 0.8rem 1.8rem;
            border-radius: 4px;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s;
        }
        .submit-btn:hover {
            background: #27ae60;
        }
        footer {
            background: #2c3e50;
            color: #ecf0f1;
            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: #f1c40f;
            margin-bottom: 1.2rem;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #bdc3c7;
        }
        .footer-links a:hover {
            color: #f1c40f;
        }
        friend-link {
            display: block;
            margin-top: 1rem;
            padding-top: 1rem;
            border-top: 1px solid #4a6491;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #4a6491;
            color: #95a5a6;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 2rem; }
            h3 { font-size: 1.6rem; }
            h4 { font-size: 1.3rem; }
        }
        @media (max-width: 768px) {
            .header-container {
                flex-direction: column;
                align-items: flex-start;
            }
            .hamburger {
                display: block;
                position: absolute;
                top: 1.2rem;
                right: 20px;
            }
            nav {
                width: 100%;
                margin-top: 1rem;
                display: none;
            }
            .nav-links {
                flex-direction: column;
                width: 100%;
            }
            .nav-links li {
                margin: 0;
                border-bottom: 1px solid #4a6491;
            }
            .nav-links a {
                display: block;
                padding: 0.8rem 0;
            }
            .nav-active {
                display: block;
            }
            .breadcrumb li {
                font-size: 0.9rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-input, .search-btn {
                width: 100%;
                border-radius: 4px;
                margin-bottom: 0.5rem;
            }
        }
        @media (max-width: 480px) {
            h1 { font-size: 2rem; }
            .container { padding: 0 15px; }
            .user-interaction { padding: 1rem; }
        }