* { 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: #2c3e50;
            background-color: #f8f9fa;
            max-width: 100vw;
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; }
        h1 { font-size: 2.8rem; color: #1a5276; margin-bottom: 1.5rem; line-height: 1.2; }
        h2 { font-size: 2.2rem; color: #21618c; margin: 2.5rem 0 1.2rem; padding-bottom: 0.5rem; border-bottom: 2px solid #aed6f1; }
        h3 { font-size: 1.8rem; color: #2874a6; margin: 2rem 0 1rem; }
        h4 { font-size: 1.4rem; color: #3498db; margin: 1.5rem 0 0.8rem; }
        p { margin-bottom: 1.5rem; text-align: justify; }
        a { color: #2980b9; text-decoration: none; transition: color 0.3s; }
        a:hover { color: #e74c3c; }
        strong { color: #1a5276; font-weight: 700; }
        em { font-style: italic; color: #555; }
        .highlight { background-color: #fffacd; padding: 0.2rem 0.4rem; border-radius: 3px; }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #1a5276 0%, #2c3e50 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-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-family: 'Georgia', serif;
            font-size: 2.2rem;
            font-weight: 700;
            color: #f1c40f;
            text-decoration: none;
            display: flex;
            align-items: center;
        }
        .my-logo i { margin-right: 10px; font-size: 1.8rem; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: #ecf0f1;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 0.5rem 0.8rem;
            border-radius: 4px;
        }
        .main-nav a:hover, .main-nav a.active {
            background-color: rgba(241, 196, 15, 0.2);
            color: #f1c40f;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: #1a5276;
                padding: 1rem;
                box-shadow: 0 5px 10px rgba(0,0,0,0.2);
            }
            .main-nav.active ul { display: flex; }
            .main-nav ul li { text-align: center; margin: 0.5rem 0; }
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #e8f4fc;
            font-size: 0.9rem;
            margin-bottom: 2rem;
        }
        .breadcrumb a { color: #3498db; }
        .breadcrumb span { color: #7f8c8d; }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin: 2rem 0;
        }
        @media (max-width: 1024px) {
            .main-content { grid-template-columns: 1fr; }
        }
        .article-content {
            background-color: white;
            padding: 2.5rem;
            border-radius: 10px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.05);
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 2rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid #eee;
            font-size: 0.9rem;
            color: #7f8c8d;
        }
        .update-time { color: #e74c3c; font-weight: 600; }
        .sidebar {
            background-color: white;
            padding: 1.8rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar-widget { margin-bottom: 2rem; }
        .sidebar-widget h3 { font-size: 1.4rem; margin-top: 0; }
        .search-form { display: flex; }
        .search-form input {
            flex-grow: 1;
            padding: 0.8rem;
            border: 1px solid #bdc3c7;
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }
        .search-form button {
            background-color: #3498db;
            color: white;
            border: none;
            padding: 0.8rem 1.2rem;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-form button:hover { background-color: #2980b9; }
        .rating-form, .comment-form {
            background-color: #f8f9fa;
            padding: 1.5rem;
            border-radius: 8px;
            margin-top: 2rem;
        }
        .rating-form h3, .comment-form h3 { margin-top: 0; }
        .stars { margin: 1rem 0; font-size: 1.5rem; color: #f1c40f; cursor: pointer; }
        .stars i { margin-right: 5px; }
        .form-group { margin-bottom: 1rem; }
        .form-group label { display: block; margin-bottom: 0.5rem; font-weight: 600; }
        .form-group input, .form-group textarea, .form-group select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #bdc3c7;
            border-radius: 4px;
            font-size: 1rem;
        }
        .form-group textarea { min-height: 120px; resize: vertical; }
        .submit-btn {
            background-color: #2ecc71;
            color: white;
            border: none;
            padding: 0.9rem 1.8rem;
            border-radius: 4px;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.3s;
        }
        .submit-btn:hover { background-color: #27ae60; }
        .featured-image {
            margin: 2.5rem 0;
            text-align: center;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
        }
        .featured-image img { width: 100%; max-height: 500px; object-fit: cover; }
        .image-caption {
            font-style: italic;
            color: #7f8c8d;
            padding: 0.8rem;
            background-color: #f8f9fa;
            font-size: 0.9rem;
        }
        .internal-links {
            background-color: #e8f4fc;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2.5rem 0;
        }
        .internal-links ul { list-style: none; columns: 2; }
        .internal-links li { margin-bottom: 0.8rem; }
        @media (max-width: 600px) {
            .internal-links ul { columns: 1; }
        }
        .site-footer {
            background: linear-gradient(135deg, #2c3e50 0%, #1a5276 100%);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 { color: #f1c40f; margin-bottom: 1.5rem; }
        .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;
            padding: 0.5rem 0;
            border-bottom: 1px dashed #7f8c8d;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #34495e;
            color: #bdc3c7;
            font-size: 0.9rem;
        }
        .text-center { text-align: center; }
        .mb-3 { margin-bottom: 3rem; }
        .py-2 { padding-top: 2rem; padding-bottom: 2rem; }
        .emoji { font-size: 1.2em; margin-right: 5px; }