* { 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;
            max-width: 100vw;
            overflow-x: hidden;
        }
        a { color: #0056b3; text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: #ff6b35; }
        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: 2px 5px; border-radius: 3px; }
        .emoji { font-size: 1.2em; margin-right: 5px; }
        .site-header {
            background: linear-gradient(135deg, #001489 0%, #0056b3 100%);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 900;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i { color: #ff6b35; }
        .my-logo a { color: inherit; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover {
            color: #ffcc00;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: #ffcc00;
            transition: width 0.3s;
        }
        .main-nav a:hover::after { width: 100%; }
        .hamburger {
            display: none;
            cursor: pointer;
            font-size: 1.8rem;
            color: white;
        }
        .breadcrumb {
            padding: 1rem 20px;
            background-color: #e9ecef;
            font-size: 0.9rem;
        }
        .breadcrumb a { color: #6c757d; }
        .breadcrumb a:hover { color: #0056b3; }
        .breadcrumb span { color: #6c757d; margin: 0 5px; }
        .main-content {
            padding: 2rem 0;
            background: white;
            min-height: 80vh;
        }
        .article-container {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        @media (max-width: 992px) {
            .article-container { grid-template-columns: 1fr; }
        }
        article {
            padding-right: 1rem;
        }
        .article-header { margin-bottom: 2.5rem; }
        .article-header h1 {
            font-size: 2.8rem;
            line-height: 1.2;
            margin-bottom: 1rem;
            color: #001489;
        }
        .article-meta {
            color: #666;
            font-size: 0.95rem;
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            padding-bottom: 1rem;
            border-bottom: 2px solid #eee;
        }
        .last-updated { color: #d9534f; font-weight: bold; }
        h2 {
            font-size: 2rem;
            color: #0056b3;
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #eee;
        }
        h3 {
            font-size: 1.6rem;
            color: #333;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #555;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            hyphens: auto;
        }
        .lead {
            font-size: 1.2rem;
            color: #444;
            font-weight: 500;
            padding: 1rem;
            background: #f1f8ff;
            border-left: 5px solid #0056b3;
            border-radius: 0 5px 5px 0;
        }
        .article-image {
            margin: 2rem auto;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            max-width: 800px;
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            padding: 0.5rem;
            font-size: 0.9rem;
            background: #f9f9f9;
        }
        ul, ol {
            margin-bottom: 1.5rem;
            padding-left: 2rem;
        }
        li { margin-bottom: 0.5rem; }
        .sidebar {
            background: #f8f9fa;
            padding: 1.5rem;
            border-radius: 10px;
            border-left: 5px solid #ff6b35;
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar-widget {
            margin-bottom: 2rem;
        }
        .sidebar h3 {
            font-size: 1.4rem;
            color: #001489;
            margin-top: 0;
        }
        .search-form {
            display: flex;
            margin-bottom: 1rem;
        }
        .search-form input {
            flex-grow: 1;
            padding: 0.8rem;
            border: 2px solid #ddd;
            border-radius: 5px 0 0 5px;
            font-size: 1rem;
        }
        .search-form button {
            background: #0056b3;
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 5px 5px 0;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-form button:hover { background: #ff6b35; }
        .comment-form, .rating-form {
            background: white;
            padding: 1.5rem;
            border-radius: 8px;
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
            margin-bottom: 1.5rem;
        }
        .form-group {
            margin-bottom: 1rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #555;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #ccc;
            border-radius: 5px;
            font-family: inherit;
            font-size: 1rem;
        }
        .form-group textarea { min-height: 120px; resize: vertical; }
        .submit-btn {
            background: #28a745;
            color: white;
            padding: 0.8rem 1.5rem;
            border: none;
            border-radius: 5px;
            font-weight: bold;
            cursor: pointer;
            transition: background 0.3s;
            width: 100%;
        }
        .submit-btn:hover { background: #218838; }
        .star-rating {
            display: flex;
            justify-content: center;
            gap: 5px;
            font-size: 1.8rem;
            color: #ddd;
            direction: rtl;
            margin: 1rem 0;
        }
        .star-rating input { display: none; }
        .star-rating label {
            cursor: pointer;
            color: #ddd;
        }
        .star-rating input:checked ~ label,
        .star-rating label:hover,
        .star-rating label:hover ~ label {
            color: #ffcc00;
        }
        .site-footer {
            background: #1a1a1a;
            color: #ccc;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-logo { font-size: 1.8rem; color: white; margin-bottom: 1rem; }
        .footer-links h4 { color: #ffcc00; margin-bottom: 1rem; font-size: 1.2rem; }
        .footer-links ul { list-style: none; padding-left: 0; }
        .footer-links li { margin-bottom: 0.5rem; }
        .footer-links a { color: #aaa; }
        .footer-links a:hover { color: #ffcc00; }
        friend-link {
            display: block;
            background: #2c2c2c;
            padding: 1rem;
            border-radius: 5px;
            margin-bottom: 0.5rem;
            border-left: 4px solid #0056b3;
        }
        friend-link a {
            color: #ffcc00;
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #444;
            color: #888;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .header-container { 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%;
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
            .main-nav a {
                display: block;
                padding: 0.8rem 0;
            }
            .article-header h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .sidebar { position: static; }
        }
        .interactive-box {
            background: linear-gradient(145deg, #f0f8ff, #e6f0ff);
            border: 2px dashed #0056b3;
            border-radius: 10px;
            padding: 1.5rem;
            margin: 2rem 0;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .interactive-box:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,86,179,0.15);
        }
        .tip { background: #e7f7ef; border-left: 5px solid #28a745; padding: 1rem; }
        .warning { background: #fff3cd; border-left: 5px solid #ffc107; padding: 1rem; }