* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f8f9fa;
            background-image: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a { color: #4a6fa5; text-decoration: none; transition: color 0.3s, transform 0.2s; }
        a:hover { color: #ff6b6b; transform: translateY(-2px); }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { padding-left: 1.5em; margin-bottom: 1.5rem; }
        li { margin-bottom: 0.5rem; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .text-center { text-align: center; }
        .bold { font-weight: 700; }
        .highlight { background-color: #fffacd; padding: 0.2rem 0.4rem; border-radius: 3px; }
        .emoji { font-size: 1.2em; }
        .site-header {
            background: linear-gradient(90deg, #2c3e50, #4a6fa5);
            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: 1.8rem;
            font-weight: 800;
            color: #ffde59;
            text-shadow: 2px 2px 0 #e74c3c;
            letter-spacing: 1px;
            transition: all 0.3s;
        }
        .my-logo:hover {
            transform: scale(1.05);
            color: #fff;
            text-shadow: 3px 3px 0 #ff6b6b;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 0.8rem;
            border-radius: 4px;
        }
        .main-nav a:hover {
            background-color: rgba(255, 255, 255, 0.15);
            color: #ffde59;
        }
        .breadcrumb {
            background-color: #e9ecef;
            padding: 0.8rem 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #ced4da;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding-left: 0;
            margin: 0;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '/';
            margin: 0 0.75rem;
            color: #6c757d;
        }
        .breadcrumb a { color: #495057; }
        main {
            flex: 1;
            padding: 3rem 0;
        }
        .article-header {
            margin-bottom: 3rem;
            padding-bottom: 2rem;
            border-bottom: 3px solid #4a6fa5;
        }
        .article-header h1 {
            font-size: 3rem;
            color: #2c3e50;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .article-meta {
            color: #6c757d;
            font-size: 0.95rem;
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            margin-top: 1rem;
        }
        .article-meta i { margin-right: 0.5rem; }
        .content-section {
            margin-bottom: 4rem;
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 6px 15px rgba(0,0,0,0.05);
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .content-section:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 25px rgba(0,0,0,0.08);
        }
        h2 {
            font-size: 2.2rem;
            color: #4a6fa5;
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px dashed #c0d6df;
        }
        h3 {
            font-size: 1.8rem;
            color: #e74c3c;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.4rem;
            color: #27ae60;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.1rem;
        }
        .featured-image {
            float: right;
            margin: 0 0 1.5rem 2.5rem;
            max-width: 450px;
            border-radius: 10px;
            border: 5px solid #ffde59;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
        }
        .interactive-module {
            background: #f1f8ff;
            border-left: 5px solid #4a6fa5;
            padding: 2rem;
            margin: 2.5rem 0;
            border-radius: 0 10px 10px 0;
        }
        .module-title {
            color: #2c3e50;
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        form {
            display: grid;
            gap: 1.2rem;
            max-width: 600px;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #495057;
        }
        .form-control {
            width: 100%;
            padding: 0.85rem;
            border: 2px solid #ced4da;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-control:focus {
            outline: none;
            border-color: #4a6fa5;
            box-shadow: 0 0 0 3px rgba(74, 111, 165, 0.2);
        }
        .btn {
            display: inline-block;
            background: linear-gradient(90deg, #4a6fa5, #2c3e50);
            color: white;
            padding: 0.9rem 2rem;
            border: none;
            border-radius: 8px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: all 0.3s;
            justify-self: start;
        }
        .btn:hover {
            background: linear-gradient(90deg, #ff6b6b, #e74c3c);
            transform: scale(1.05);
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: #ffd700;
            margin: 1rem 0;
        }
        .star-rating i {
            cursor: pointer;
            transition: transform 0.2s;
        }
        .star-rating i:hover {
            transform: scale(1.3);
        }
        .content-link {
            color: #27ae60;
            border-bottom: 1px dotted #27ae60;
            font-weight: 600;
        }
        .content-link:hover {
            color: #e74c3c;
            border-bottom-style: solid;
        }
        .site-footer {
            background: #2c3e50;
            color: #ecf0f1;
            padding: 3rem 0 1.5rem;
            margin-top: auto;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
        }
        .footer-section h4 {
            color: #ffde59;
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li { margin-bottom: 0.75rem; }
        .footer-links a {
            color: #bdc3c7;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .footer-links a:hover { color: #ffde59; }
        friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.05);
            padding: 1rem;
            border-radius: 6px;
            margin-top: 1rem;
            font-style: italic;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #4a6fa5;
            color: #95a5a6;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .article-header h1 { font-size: 2.5rem; }
            h2 { font-size: 2rem; }
            .featured-image {
                float: none;
                margin: 0 auto 2rem;
                max-width: 80%;
            }
        }
        @media (max-width: 768px) {
            .nav-toggle { display: block; }
            .main-nav {
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: #2c3e50;
                clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
                transition: clip-path 0.4s ease-in-out;
            }
            .main-nav.active {
                clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
            }
            .main-nav ul {
                flex-direction: column;
                padding: 1.5rem;
                gap: 0;
            }
            .main-nav li { margin-bottom: 1rem; }
            .content-section { padding: 1.8rem; }
            .article-header h1 { font-size: 2rem; }
            h2 { font-size: 1.7rem; }
            h3 { font-size: 1.5rem; }
            p { font-size: 1rem; }
        }
        @media (max-width: 576px) {
            .container { padding: 0 1rem; }
            .article-meta { flex-direction: column; gap: 0.5rem; }
            .featured-image { max-width: 100%; }
        }