:root {
            --primary: #1a6bc4;
            --primary-dark: #0d4a8c;
            --secondary: #ff6b00;
            --secondary-dark: #cc5500;
            --dark: #0c1b33;
            --light: #f0f4f8;
            --gray: #6c757d;
            --success: #28a745;
            --danger: #dc3545;
            --border-radius: 8px;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f8f9fa;
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .btn {
            display: inline-block;
            padding: 12px 28px;
            background-color: var(--primary);
            color: white;
            border-radius: var(--border-radius);
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn:hover {
            background-color: var(--primary-dark);
            color: white;
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }
        .btn-secondary {
            background-color: var(--secondary);
        }
        .btn-secondary:hover {
            background-color: var(--secondary-dark);
        }
        header {
            background-color: var(--dark);
            color: white;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .my-logo {
            font-family: 'Arial Black', sans-serif;
            font-size: 2.2rem;
            background: linear-gradient(to right, #1a6bc4, #00c6ff);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-decoration: none;
            font-weight: 900;
            letter-spacing: 1px;
        }
        .my-logo span {
            color: #ff6b00;
        }
        .nav-desktop {
            display: flex;
            gap: 30px;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
        }
        .nav-desktop a {
            color: white;
            font-weight: 500;
            position: relative;
            padding: 5px 0;
        }
        .nav-desktop a:hover {
            color: #ff6b00;
        }
        .nav-desktop a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: #ff6b00;
            transition: width 0.3s ease;
        }
        .nav-desktop a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background-color: var(--dark);
            padding: 20px;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            color: white;
            padding: 15px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            font-weight: 500;
        }
        .nav-mobile a:hover {
            background-color: rgba(255,107,0,0.1);
            color: #ff6b00;
        }
        .breadcrumb {
            padding: 15px 0;
            background-color: #e9ecef;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--gray);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb span {
            color: var(--gray);
            margin: 0 8px;
        }
        main {
            padding: 40px 0;
            background-color: white;
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        @media (max-width: 992px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            max-width: 100%;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--dark);
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-left: 6px solid var(--secondary);
            padding-left: 20px;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
        }
        h2 {
            font-size: 2rem;
            color: var(--primary-dark);
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 10px;
            border-bottom: 2px solid #eee;
        }
        h3 {
            font-size: 1.6rem;
            color: var(--dark);
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: var(--gray);
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.05rem;
            text-align: justify;
        }
        .intro {
            font-size: 1.2rem;
            color: var(--primary-dark);
            font-weight: 500;
            background-color: #f0f8ff;
            padding: 20px;
            border-radius: var(--border-radius);
            border-left: 4px solid var(--primary);
            margin-bottom: 2.5rem;
        }
        .highlight {
            background-color: #fff9e6;
            padding: 25px;
            border-radius: var(--border-radius);
            border: 1px solid #ffd166;
            margin: 2rem 0;
        }
        .highlight h3 {
            color: #e69500;
            margin-top: 0;
        }
        .image-container {
            margin: 2.5rem 0;
            text-align: center;
        }
        .image-container img {
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            width: 100%;
            max-height: 500px;
            object-fit: cover;
        }
        .image-caption {
            margin-top: 10px;
            font-style: italic;
            color: var(--gray);
            font-size: 0.95rem;
        }
        ul, ol {
            margin-left: 25px;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.7rem;
        }
        strong {
            color: var(--primary-dark);
            font-weight: 700;
        }
        .quote {
            border-left: 5px solid var(--secondary);
            padding-left: 25px;
            margin: 2.5rem 0;
            font-style: italic;
            color: #555;
            background-color: #f9f9f9;
            padding-top: 15px;
            padding-bottom: 15px;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .quote-author {
            text-align: right;
            font-weight: 600;
            color: var(--dark);
            margin-top: 10px;
        }
        .link-list {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin: 2rem 0;
        }
        .link-item {
            background-color: #f1f8ff;
            padding: 12px 20px;
            border-radius: var(--border-radius);
            border: 1px solid #c2e0ff;
            transition: var(--transition);
        }
        .link-item:hover {
            background-color: #e1f0ff;
            transform: translateY(-3px);
        }
        .sidebar {
            background-color: #f8f9fa;
            padding: 25px;
            border-radius: var(--border-radius);
            height: fit-content;
            box-shadow: var(--shadow);
        }
        .sidebar-widget {
            margin-bottom: 30px;
            padding-bottom: 25px;
            border-bottom: 1px solid #dee2e6;
        }
        .sidebar-widget:last-child {
            border-bottom: none;
            margin-bottom: 0;
            padding-bottom: 0;
        }
        .sidebar-widget h3 {
            font-size: 1.4rem;
            color: var(--primary-dark);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .search-form {
            display: flex;
        }
        .search-form input {
            flex: 1;
            padding: 12px 15px;
            border: 1px solid #ccc;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
        }
        .search-form button {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 0 20px;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: var(--primary-dark);
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            font-size: 1.8rem;
            color: #ffc107;
            margin: 15px 0;
            cursor: pointer;
        }
        .stars i {
            transition: var(--transition);
            margin: 0 2px;
        }
        .stars i:hover {
            transform: scale(1.2);
        }
        .update-time {
            font-size: 0.9rem;
            color: var(--gray);
            background-color: #e9ecef;
            padding: 10px 15px;
            border-radius: var(--border-radius);
            margin-top: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .comment-section {
            margin-top: 50px;
            padding-top: 30px;
            border-top: 2px solid #eee;
        }
        .comment-form textarea {
            width: 100%;
            padding: 15px;
            border: 1px solid #ccc;
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
            margin-bottom: 15px;
            min-height: 150px;
        }
        .comment-form .form-row {
            display: flex;
            gap: 15px;
            margin-bottom: 20px;
        }
        @media (max-width: 576px) {
            .comment-form .form-row {
                flex-direction: column;
            }
        }
        .comment-form input {
            flex: 1;
            padding: 12px 15px;
            border: 1px solid #ccc;
            border-radius: var(--border-radius);
            font-size: 1rem;
        }
        footer {
            background-color: var(--dark);
            color: #b0b7c3;
            padding: 50px 0 30px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 2rem;
            color: white;
            font-weight: 900;
            margin-bottom: 20px;
            display: block;
        }
        .footer-links h4 {
            color: white;
            margin-bottom: 20px;
            font-size: 1.2rem;
        }
        .footer-links ul {
            list-style: none;
            margin-left: 0;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #b0b7c3;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            margin: 10px 0;
        }
        friend-link a {
            color: #ff6b00;
            font-weight: 500;
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #2a3a5a;
            font-size: 0.9rem;
            color: #8a94a6;
        }