* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f8f9fa;
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { text-decoration: none; color: inherit; transition: all 0.3s ease; }
        ul, ol { list-style-position: inside; margin-left: 1rem; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
            color: white;
            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;
            padding: 1rem 0;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            background: linear-gradient(90deg, #00d2ff, #3a7bd5);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: -1px;
        }
        .my-logo:hover {
            transform: scale(1.03);
        }
        .main-nav ul {
            display: flex;
            gap: 2rem;
        }
        .main-nav a {
            font-weight: 600;
            padding: 0.5rem 0.75rem;
            border-radius: 4px;
            position: relative;
        }
        .main-nav a:hover, .main-nav a.active {
            background-color: rgba(255,255,255,0.15);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 3px;
            background: #00d2ff;
            transition: width 0.3s;
        }
        .main-nav a:hover::after {
            width: 80%;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            background: none;
            border: none;
            color: white;
        }
        .breadcrumb {
            background-color: #e9ecef;
            padding: 0.8rem 0;
            font-size: 0.9rem;
            color: #6c757d;
        }
        .breadcrumb a { color: #1e3c72; }
        .breadcrumb a:hover { text-decoration: underline; }
        .search-box {
            margin: 2rem auto;
            max-width: 700px;
            display: flex;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            border-radius: 50px;
            overflow: hidden;
        }
        .search-input {
            flex-grow: 1;
            padding: 1.2rem 1.5rem;
            border: none;
            font-size: 1.1rem;
            outline: none;
        }
        .search-button {
            background: linear-gradient(90deg, #3a7bd5, #00d2ff);
            color: white;
            border: none;
            padding: 0 2rem;
            cursor: pointer;
            font-size: 1.1rem;
            font-weight: 600;
        }
        .search-button:hover { background: linear-gradient(90deg, #2a5298, #3a7bd5); }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding: 2rem 0;
        }
        @media (max-width: 992px) {
            .main-content { grid-template-columns: 1fr; }
        }
        .article-content {
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
        }
        .article-meta {
            color: #6c757d;
            margin-bottom: 1.5rem;
            font-size: 0.95rem;
            display: flex;
            justify-content: space-between;
            border-bottom: 1px solid #eee;
            padding-bottom: 1rem;
        }
        h1 {
            font-size: 2.8rem;
            color: #1e3c72;
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        h2 {
            font-size: 2rem;
            color: #2a5298;
            margin: 2.5rem 0 1rem 0;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid #00d2ff;
        }
        h3 {
            font-size: 1.6rem;
            color: #3a7bd5;
            margin: 2rem 0 1rem 0;
        }
        h4 {
            font-size: 1.3rem;
            color: #555;
            margin: 1.5rem 0 0.75rem 0;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 500;
            color: #444;
            background-color: #f0f8ff;
            padding: 1.5rem;
            border-left: 5px solid #3a7bd5;
            border-radius: 0 8px 8px 0;
            margin-bottom: 2rem;
        }
        .highlight-box {
            background: linear-gradient(135deg, #fff9e6, #ffeaa7);
            border: 2px solid #fdcb6e;
            border-radius: 10px;
            padding: 1.5rem;
            margin: 2rem 0;
        }
        .highlight-box h4 { color: #d35400; }
        .img-container {
            margin: 2.5rem auto;
            text-align: center;
            max-width: 800px;
        }
        .img-container img {
            border-radius: 12px;
            box-shadow: 0 15px 35px rgba(0,0,0,0.1);
            border: 1px solid #ddd;
        }
        .img-caption {
            font-style: italic;
            color: #666;
            margin-top: 0.8rem;
            font-size: 0.95rem;
        }
        .internal-links {
            background-color: #e3f2fd;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
        }
        .internal-links h4 { color: #1565c0; }
        .internal-links ul { list-style-type: none; margin-left: 0; }
        .internal-links li { margin-bottom: 0.7rem; }
        .internal-links a {
            color: #1e3c72;
            font-weight: 500;
            display: block;
            padding: 0.5rem 0.8rem;
            border-radius: 4px;
        }
        .internal-links a:hover {
            background-color: #bbdefb;
            padding-left: 1.2rem;
        }
        blockquote {
            border-left: 4px solid #00d2ff;
            padding-left: 1.5rem;
            margin: 2rem 0;
            font-style: italic;
            color: #555;
            background-color: #f8fdff;
            padding: 1.5rem;
            border-radius: 0 8px 8px 0;
        }
        .sidebar {
            background: white;
            border-radius: 12px;
            padding: 2rem;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar h3 {
            font-size: 1.4rem;
            margin-top: 0;
            color: #1e3c72;
            border-bottom: 2px solid #eee;
            padding-bottom: 0.8rem;
        }
        .sidebar-section {
            margin-bottom: 2rem;
        }
        .sidebar ul { list-style: none; margin-left: 0; }
        .sidebar li { margin-bottom: 0.8rem; padding-bottom: 0.8rem; border-bottom: 1px dashed #eee; }
        .sidebar a { color: #3a7bd5; display: flex; align-items: center; }
        .sidebar a:hover { color: #00d2ff; padding-left: 5px; }
        .sidebar i { margin-right: 10px; color: #2a5298; }
        .rating-section, .comments-section {
            background: white;
            padding: 2rem;
            border-radius: 12px;
            margin: 2rem 0;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
        }
        .rating-box {
            text-align: center;
            padding: 2rem;
            background: linear-gradient(135deg, #fef9e7, #f7dc6f);
            border-radius: 10px;
        }
        .stars {
            font-size: 2rem;
            color: #ffc107;
            margin-bottom: 1rem;
            letter-spacing: 5px;
        }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
            margin-top: 2rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-control {
            width: 100%;
            padding: 0.9rem 1rem;
            border: 1px solid #ced4da;
            border-radius: 6px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-control:focus {
            border-color: #3a7bd5;
            outline: none;
            box-shadow: 0 0 0 3px rgba(58,123,213,0.2);
        }
        .btn-submit {
            background: linear-gradient(90deg, #3a7bd5, #00d2ff);
            color: white;
            border: none;
            padding: 1rem 2rem;
            font-size: 1.1rem;
            font-weight: 600;
            border-radius: 50px;
            cursor: pointer;
            align-self: flex-start;
            transition: all 0.3s;
        }
        .btn-submit:hover {
            background: linear-gradient(90deg, #2a5298, #3a7bd5);
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(0,0,0,0.1);
        }
        .comment-list {
            margin-top: 2.5rem;
        }
        .comment-item {
            padding: 1.5rem;
            border-bottom: 1px solid #eee;
            display: flex;
            gap: 1.5rem;
        }
        .comment-avatar {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: linear-gradient(135deg, #3a7bd5, #00d2ff);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.5rem;
            font-weight: bold;
            flex-shrink: 0;
        }
        .comment-body h5 {
            color: #1e3c72;
            margin-bottom: 0.5rem;
        }
        .comment-date {
            color: #888;
            font-size: 0.9rem;
        }
        .site-footer {
            background: #1a1a2e;
            color: #ccc;
            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: 2.5rem;
        }
        .footer-logo {
            font-size: 2.5rem;
            font-weight: 900;
            background: linear-gradient(90deg, #00d2ff, #3a7bd5);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 1rem;
        }
        .footer-heading {
            color: white;
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #3a7bd5;
            display: inline-block;
        }
        .footer-links ul { list-style: none; margin-left: 0; }
        .footer-links li { margin-bottom: 0.8rem; }
        .footer-links a {
            color: #aaa;
            display: flex;
            align-items: center;
        }
        .footer-links a:hover {
            color: #00d2ff;
            padding-left: 8px;
        }
        .footer-links i { margin-right: 10px; width: 20px; }
        friend-link {
            display: block;
            margin: 1rem 0;
            padding: 0.8rem 1rem;
            background-color: #2a2a3e;
            border-radius: 6px;
            border-left: 4px solid #00d2ff;
        }
        friend-link a { color: #ddd; font-weight: 500; }
        friend-link a:hover { color: white; }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid #333;
            color: #888;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav ul {
                position: fixed;
                top: 80px;
                left: -100%;
                flex-direction: column;
                background: #1e3c72;
                width: 100%;
                padding: 2rem;
                transition: left 0.5s ease;
                box-shadow: 0 10px 20px rgba(0,0,0,0.2);
                z-index: 999;
            }
            .main-nav.active ul { left: 0; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            .article-content { padding: 1.5rem; }
            .header-content, .footer-content { flex-direction: column; text-align: center; gap: 1rem; }
            .search-box { border-radius: 10px; }
            .search-input, .search-button { padding: 1rem; }
        }
        @media (max-width: 480px) {
            .container { padding: 0 15px; }
            h1 { font-size: 1.8rem; }
            .lead { font-size: 1.1rem; }
        }
        .fade-in {
            animation: fadeIn 1s ease-out;
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .pulse {
            animation: pulse 2s infinite;
        }
        @keyframes pulse {
            0% { box-shadow: 0 0 0 0 rgba(58,123,213,0.4); }
            70% { box-shadow: 0 0 0 15px rgba(58,123,213,0); }
            100% { box-shadow: 0 0 0 0 rgba(58,123,213,0); }
        }