* { 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: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a { color: #2a5db0; text-decoration: none; transition: all 0.3s ease; }
        a:hover { color: #e63946; text-decoration: underline; }
        img { max-width: 100%; height: auto; display: block; }
        .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; border-radius: 3px; }
        .emoji { font-size: 1.2em; }
        .last-updated { font-size: 0.9em; color: #666; font-style: italic; }
        .section-gap { margin-top: 3rem; margin-bottom: 3rem; }
        .content-gap { margin-top: 2rem; margin-bottom: 2rem; }
        .site-header {
            background: linear-gradient(to right, #1e3c72, #2a5298);
            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: 2rem;
            font-weight: 800;
            color: #ffd700;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
        }
        .my-logo:hover { text-decoration: none; color: #fff; }
        .main-nav ul {
            display: flex;
            list-style: none;
        }
        .main-nav a {
            color: white;
            padding: 0.75rem 1.25rem;
            font-weight: 600;
            border-radius: 4px;
        }
        .main-nav a:hover {
            background-color: rgba(255, 255, 255, 0.15);
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: #e9ecef;
            padding: 0.8rem 0;
            font-size: 0.9rem;
            margin-bottom: 1rem;
        }
        .breadcrumb a { color: #495057; }
        .breadcrumb a:hover { color: #1e3c72; }
        .breadcrumb span { color: #6c757d; }
        .search-box {
            background-color: #fff;
            border-radius: 50px;
            padding: 0.5rem 1rem;
            margin: 1rem auto 2rem;
            max-width: 600px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
        }
        .search-form {
            display: flex;
        }
        .search-form input {
            flex-grow: 1;
            border: none;
            outline: none;
            padding: 0.8rem;
            font-size: 1rem;
        }
        .search-form button {
            background: #2a5db0;
            color: white;
            border: none;
            border-radius: 50px;
            padding: 0 1.5rem;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-form button:hover { background: #1e3c72; }
        main { flex: 1; padding: 2rem 0; }
        article {
            background-color: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            margin-bottom: 2rem;
        }
        h1 {
            color: #1e3c72;
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid #ffd700;
            padding-bottom: 0.5rem;
        }
        h2 {
            color: #2a5298;
            font-size: 2rem;
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px dashed #ccc;
        }
        h3 {
            color: #e63946;
            font-size: 1.5rem;
            margin-top: 2rem;
            margin-bottom: 0.8rem;
        }
        h4 {
            color: #495057;
            font-size: 1.2rem;
            margin-top: 1.5rem;
            margin-bottom: 0.5rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            color: #555;
            font-weight: 500;
        }
        .feature-img {
            width: 100%;
            border-radius: 10px;
            margin: 2rem auto;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
            border: 5px solid #fff;
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .internal-links {
            background-color: #f1f8ff;
            border-left: 5px solid #2a5db0;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .internal-links h3 { margin-top: 0; color: #1e3c72; }
        .internal-links ul { list-style-position: inside; }
        .internal-links li { margin-bottom: 0.5rem; }
        .user-interaction {
            background-color: #f8f9fa;
            border-radius: 10px;
            padding: 2rem;
            margin-top: 3rem;
            border: 1px solid #dee2e6;
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }
        .rating-box, .comment-box {
            background: white;
            padding: 1.5rem;
            border-radius: 8px;
            box-shadow: 0 4px 10px rgba(0,0,0,0.05);
        }
        .stars {
            color: #ffc107;
            font-size: 1.5rem;
            margin: 0.5rem 0;
            cursor: pointer;
        }
        .stars span { margin-right: 5px; }
        .stars span:hover { transform: scale(1.2); }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.3rem;
            font-weight: 600;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #ced4da;
            border-radius: 5px;
            font-family: inherit;
            font-size: 1rem;
        }
        .form-group textarea { min-height: 120px; resize: vertical; }
        .submit-btn {
            background: #28a745;
            color: white;
            border: none;
            padding: 0.9rem 1.5rem;
            border-radius: 5px;
            font-weight: bold;
            cursor: pointer;
            transition: background 0.3s;
            align-self: flex-start;
        }
        .submit-btn:hover { background: #218838; }
        .site-footer {
            background: #212529;
            color: #adb5bd;
            padding: 3rem 0 1.5rem;
            margin-top: auto;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-section h3 {
            color: #ffd700;
            font-size: 1.3rem;
            margin-bottom: 1.2rem;
        }
        .footer-links { list-style: none; }
        .footer-links li { margin-bottom: 0.7rem; }
        .footer-links a { color: #adb5bd; }
        .footer-links a:hover { color: white; }
        friend-link {
            display: inline-block;
            background: #343a40;
            color: #ffd700;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            margin-right: 0.5rem;
            margin-bottom: 0.5rem;
            border: 1px solid #495057;
        }
        friend-link a { color: inherit; }
        .copyright {
            text-align: center;
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid #495057;
            font-size: 0.9rem;
            color: #6c757d;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.3rem; }
            h2 { font-size: 1.8rem; }
            article { padding: 2rem; }
        }
        @media (max-width: 768px) {
            .header-container { flex-wrap: wrap; }
            .main-nav {
                width: 100%;
                order: 3;
                margin-top: 1rem;
                display: none;
            }
            .main-nav.active { display: block; }
            .main-nav ul {
                flex-direction: column;
                background-color: #2a5298;
                border-radius: 8px;
                padding: 1rem;
            }
            .main-nav a {
                display: block;
                padding: 1rem;
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
            .hamburger { display: block; }
            .interaction-grid { grid-template-columns: 1fr; }
        }
        @media (max-width: 576px) {
            .container { padding: 0 15px; }
            article { padding: 1.5rem; }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.6rem; }
            .search-box { padding: 0.3rem 0.8rem; }
        }