* { 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: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            background-attachment: fixed;
        }
        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: 800; }
        .highlight { background-color: #fff9c4; padding: 2px 5px; border-radius: 3px; }
        .emoji { font-size: 1.2em; margin-right: 5px; }
        .site-header {
            background: linear-gradient(90deg, #1a5276 0%, #2e86c1 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-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-family: 'Comic Sans MS', cursive, sans-serif;
            font-size: 2.2rem;
            font-weight: bold;
            color: #f7dc6f;
            text-decoration: none;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
            transition: transform 0.3s ease;
        }
        .my-logo:hover {
            transform: scale(1.05);
            color: #ffeb3b;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 1.8rem;
        }
        .main-nav a {
            color: #eaf2f8;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 0.8rem;
            border-radius: 4px;
            transition: all 0.3s ease;
        }
        .main-nav a:hover,
        .main-nav a.active {
            background-color: rgba(255, 255, 255, 0.15);
            color: #ffeb3b;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            padding: 1rem 20px;
            background-color: #e8f4fc;
            font-size: 0.9rem;
            border-bottom: 1px solid #d1e0f0;
        }
        .breadcrumb a {
            color: #2e86c1;
            text-decoration: none;
        }
        .breadcrumb a:hover { text-decoration: underline; }
        main {
            padding: 2rem 0;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
        }
        .article-content {
            background: white;
            border-radius: 15px;
            padding: 2.5rem;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
        }
        .sidebar {
            background: white;
            border-radius: 15px;
            padding: 1.5rem;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        h1 {
            font-size: 2.8rem;
            color: #1a5276;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid #f7dc6f;
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 2rem;
            color: #2e86c1;
            margin: 2.5rem 0 1.2rem 0;
            padding-left: 10px;
            border-left: 5px solid #85c1e9;
        }
        h3 {
            font-size: 1.6rem;
            color: #3498db;
            margin: 2rem 0 1rem 0;
        }
        h4 {
            font-size: 1.3rem;
            color: #5dade2;
            margin: 1.5rem 0 0.8rem 0;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            color: #555;
            font-weight: 500;
            margin-bottom: 2rem;
        }
        .search-box, .comment-form, .rating-form {
            background: #f8f9fa;
            padding: 1.5rem;
            border-radius: 10px;
            margin: 2rem 0;
            border: 1px solid #dee2e6;
        }
        .form-group {
            margin-bottom: 1rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #495057;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.75rem;
            border: 1px solid #ced4da;
            border-radius: 5px;
            font-family: inherit;
            font-size: 1rem;
        }
        button, .btn {
            background: linear-gradient(to right, #2e86c1, #1a5276);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 5px;
            cursor: pointer;
            font-weight: 600;
            transition: all 0.3s ease;
            display: inline-block;
            text-align: center;
            text-decoration: none;
        }
        button:hover, .btn:hover {
            background: linear-gradient(to right, #1a5276, #154360);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .featured-image {
            width: 100%;
            border-radius: 10px;
            margin: 2rem auto;
            border: 5px solid #d6eaf8;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
        }
        .content-link {
            color: #1a5276;
            text-decoration: none;
            border-bottom: 1px dashed #5dade2;
            font-weight: 600;
        }
        .content-link:hover {
            color: #154360;
            border-bottom-style: solid;
            background-color: #ebf5fb;
        }
        .sidebar h3 {
            color: #1a5276;
            border-bottom: 2px solid #f7dc6f;
            padding-bottom: 0.5rem;
        }
        .sidebar ul {
            list-style: none;
            margin-top: 1rem;
        }
        .sidebar li {
            margin-bottom: 0.8rem;
            padding-left: 1.2rem;
            position: relative;
        }
        .sidebar li:before {
            content: '▶';
            color: #2e86c1;
            position: absolute;
            left: 0;
            font-size: 0.8rem;
        }
        .sidebar a {
            color: #2c3e50;
            text-decoration: none;
            transition: color 0.2s;
        }
        .sidebar a:hover {
            color: #1a5276;
            text-decoration: underline;
        }
        .site-footer {
            background: #1a5276;
            color: #eaf2f8;
            padding: 2.5rem 0 1.5rem 0;
            margin-top: 3rem;
        }
        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 2rem;
        }
        .footer-section {
            flex: 1;
            min-width: 250px;
        }
        .footer-section h4 {
            color: #f7dc6f;
            margin-bottom: 1.2rem;
            font-size: 1.3rem;
        }
        friend-link {
            display: block;
            margin-bottom: 0.7rem;
        }
        friend-link a {
            color: #85c1e9;
            text-decoration: none;
        }
        friend-link a:hover {
            color: #ffeb3b;
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid #2e86c1;
            font-size: 0.9rem;
            color: #aed6f1;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
            }
            .main-nav {
                width: 100%;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.5s ease;
            }
            .main-nav.active {
                max-height: 300px;
                margin-top: 1rem;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
            }
            .main-nav li {
                width: 100%;
                text-align: center;
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
            .main-nav a {
                display: block;
                padding: 0.8rem;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            .article-content {
                padding: 1.5rem;
            }
        }