:root {
            --primary-color: #2a2a72;
            --secondary-color: #009ffd;
            --accent-color: #ffa400;
            --dark-color: #232528;
            --light-color: #f8f9fa;
            --gray-color: #6c757d;
            --success-color: #28a745;
            --font-main: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            --font-heading: 'Arial Rounded MT Bold', 'Arial', sans-serif;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --border-radius: 12px;
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-main);
            line-height: 1.7;
            color: #333;
            background-color: #f0f2f5;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            color: var(--secondary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-color);
            text-decoration: underline;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary-color) 0%, #1a1a52 100%);
            color: white;
            padding: 1rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-family: var(--font-heading);
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--accent-color);
        }
        .my-logo:hover {
            color: var(--accent-color);
            text-decoration: none;
        }
        .breadcrumb {
            padding: 10px 0;
            background-color: #e9ecef;
            font-size: 0.9rem;
            margin-bottom: 20px;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "/";
            margin: 0 10px;
            color: var(--gray-color);
        }
        .nav-desktop {
            display: flex;
            gap: 25px;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
        }
        .nav-desktop a {
            color: white;
            font-weight: 600;
            padding: 5px 0;
            position: relative;
        }
        .nav-desktop a:hover {
            text-decoration: none;
            color: var(--accent-color);
        }
        .nav-desktop a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--accent-color);
            transition: var(--transition);
        }
        .nav-desktop a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 5px;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
        }
        .nav-mobile {
            position: fixed;
            top: 70px;
            left: 0;
            width: 100%;
            background-color: var(--dark-color);
            flex-direction: column;
            padding: 20px;
            display: none;
            box-shadow: var(--shadow);
            z-index: 999;
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            color: white;
            padding: 12px 0;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            font-weight: 600;
        }
        .nav-mobile a:last-child {
            border-bottom: none;
        }
        .nav-mobile a:hover {
            color: var(--accent-color);
            padding-left: 10px;
        }
        .hero {
            background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('https://images.unsplash.com/photo-1550745165-9bc0b252726f?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80') center/cover no-repeat;
            color: white;
            text-align: center;
            padding: 4rem 1rem;
            border-radius: var(--border-radius);
            margin: 2rem 0;
        }
        .hero h1 {
            font-size: 3rem;
            margin-bottom: 1rem;
            text-shadow: 2px 2px 5px rgba(0,0,0,0.5);
        }
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.2rem;
            }
        }
        .hero p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto 2rem;
            opacity: 0.9;
        }
        .main-content {
            flex: 1;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 30px;
            padding: 20px 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background-color: white;
            padding: 2.5rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .sidebar {
            background-color: white;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 100px;
        }
        h1, h2, h3, h4 {
            font-family: var(--font-heading);
            color: var(--primary-color);
            margin-top: 1.8em;
            margin-bottom: 0.7em;
            line-height: 1.3;
        }
        h1 {
            font-size: 2.8rem;
            border-bottom: 3px solid var(--accent-color);
            padding-bottom: 10px;
        }
        h2 {
            font-size: 2.2rem;
            border-left: 5px solid var(--secondary-color);
            padding-left: 15px;
        }
        h3 {
            font-size: 1.8rem;
            color: var(--dark-color);
        }
        h4 {
            font-size: 1.4rem;
            color: var(--gray-color);
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        strong {
            color: var(--primary-color);
            font-weight: 700;
        }
        .intro {
            font-size: 1.1rem;
            background-color: #f8f9fa;
            padding: 1.5rem;
            border-left: 4px solid var(--secondary-color);
            margin-bottom: 2.5rem;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .highlight {
            background-color: #fffacd;
            padding: 2rem;
            border-radius: var(--border-radius);
            margin: 2rem 0;
            border: 2px dashed var(--accent-color);
        }
        .article-image {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: var(--border-radius);
            margin: 2rem auto;
            display: block;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .article-image:hover {
            transform: scale(1.01);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
        }
        .feature-box {
            background-color: var(--light-color);
            border-radius: var(--border-radius);
            padding: 2rem;
            margin: 2.5rem 0;
            border-top: 5px solid var(--secondary-color);
        }
        .feature-box h3 {
            margin-top: 0;
        }
        .search-box, .comment-box, .rating-box {
            margin-bottom: 2.5rem;
        }
        .search-box form, .comment-box form, .rating-box form {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 15px;
        }
        .search-box input, .comment-box input, .comment-box textarea, .rating-box select {
            flex: 1;
            min-width: 200px;
            padding: 12px 15px;
            border: 2px solid #ddd;
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        .comment-box textarea {
            min-height: 120px;
            resize: vertical;
            width: 100%;
        }
        .search-box input:focus, .comment-box input:focus, .comment-box textarea:focus, .rating-box select:focus {
            border-color: var(--secondary-color);
            outline: none;
            box-shadow: 0 0 0 3px rgba(0, 159, 253, 0.2);
        }
        button, .btn {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: var(--border-radius);
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
        button:hover, .btn:hover {
            background-color: var(--primary-color);
            text-decoration: none;
            color: white;
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
        }
        .rating-stars {
            display: flex;
            gap: 5px;
            margin: 15px 0;
        }
        .rating-stars i {
            color: #ffc107;
            font-size: 1.5rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-stars i:hover {
            transform: scale(1.2);
        }
        .link-list {
            background-color: #f8f9fa;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            margin: 2rem 0;
        }
        .link-list h3 {
            margin-top: 0;
        }
        .link-list ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 10px;
        }
        .link-list li {
            padding: 8px 0;
            border-bottom: 1px dashed #ddd;
        }
        .link-list li:last-child {
            border-bottom: none;
        }
        .site-footer {
            background-color: var(--dark-color);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-bottom: 2rem;
        }
        .footer-section h3 {
            color: white;
            border-left: 4px solid var(--accent-color);
            padding-left: 10px;
            margin-bottom: 1.2rem;
            font-size: 1.3rem;
        }
        .friend-link {
            display: inline-block;
            background-color: rgba(255,255,255,0.1);
            padding: 8px 15px;
            border-radius: 20px;
            margin: 5px;
            font-size: 0.9rem;
        }
        .friend-link:hover {
            background-color: var(--secondary-color);
            text-decoration: none;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
            color: #aaa;
        }
        .text-center { text-align: center; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .mt-2 { margin-top: 2rem; }
        .py-2 { padding-top: 2rem; padding-bottom: 2rem; }
        .updated {
            font-size: 0.9rem;
            color: var(--gray-color);
            font-style: italic;
            margin-top: 2rem;
            padding-top: 1rem;
            border-top: 1px solid #eee;
        }
        .emoji { font-size: 1.2em; }
        .hidden { display: none; }
        @media (max-width: 768px) {
            .container { padding: 0 15px; }
            .article-content { padding: 1.5rem; }
            .hero { padding: 2.5rem 1rem; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
        }