:root {
            --primary-color: #0078D4;
            --secondary-color: #107C10;
            --accent-color: #FF8C00;
            --dark-bg: #1a1a1a;
            --medium-bg: #2d2d2d;
            --light-bg: #f5f5f5;
            --text-light: #ffffff;
            --text-dark: #333333;
            --text-gray: #888888;
            --border-color: #444444;
            --shadow: 0 4px 12px rgba(0,0,0,0.3);
            --transition: all 0.3s ease;
            --border-radius: 8px;
            --container-max: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-light);
            background-color: var(--dark-bg);
            overflow-x: hidden;
        }
        .site-header {
            background: linear-gradient(135deg, var(--dark-bg) 0%, #0a0a2a 100%);
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
            border-bottom: 2px solid var(--primary-color);
        }
        .header-container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-family: 'Agency FB', Arial, sans-serif;
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-light);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: 1px;
            text-transform: uppercase;
            background: linear-gradient(to right, var(--primary-color), #00b4ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            transition: var(--transition);
        }
        .my-logo:hover {
            transform: scale(1.05);
            text-shadow: 0 0 15px rgba(0, 120, 212, 0.5);
        }
        .my-logo i {
            font-size: 1.8rem;
            -webkit-text-fill-color: var(--primary-color);
        }
        .main-nav {
            display: flex;
            gap: 2rem;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 1.8rem;
            align-items: center;
        }
        .nav-link {
            color: var(--text-light);
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
            transition: var(--transition);
            font-size: 1rem;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--accent-color);
            transition: width 0.3s ease;
        }
        .nav-link:hover {
            color: var(--accent-color);
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 5px;
            background: transparent;
            border: none;
            padding: 5px;
        }
        .hamburger span {
            display: block;
            width: 25px;
            height: 3px;
            background-color: var(--text-light);
            border-radius: 2px;
            transition: var(--transition);
        }
        .mobile-nav {
            display: none;
            position: fixed;
            top: 80px;
            left: 0;
            width: 100%;
            background-color: var(--medium-bg);
            padding: 1.5rem;
            box-shadow: 0 10px 20px rgba(0,0,0,0.5);
            z-index: 999;
            transform: translateY(-100%);
            opacity: 0;
            transition: transform 0.4s ease, opacity 0.4s ease;
        }
        .mobile-nav.active {
            transform: translateY(0);
            opacity: 1;
        }
        .mobile-nav-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
        }
        .mobile-nav-link {
            color: var(--text-light);
            text-decoration: none;
            font-size: 1.2rem;
            padding: 0.8rem 0;
            border-bottom: 1px solid var(--border-color);
            display: block;
            transition: var(--transition);
        }
        .mobile-nav-link:hover {
            color: var(--accent-color);
            padding-left: 10px;
        }
        .breadcrumb {
            background-color: var(--medium-bg);
            padding: 1rem 1.5rem;
            font-size: 0.9rem;
            border-bottom: 1px solid var(--border-color);
        }
        .breadcrumb-container {
            max-width: var(--container-max);
            margin: 0 auto;
        }
        .breadcrumb-list {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
            align-items: center;
        }
        .breadcrumb-item {
            color: var(--text-gray);
        }
        .breadcrumb-item a {
            color: var(--text-light);
            text-decoration: none;
            transition: var(--transition);
        }
        .breadcrumb-item a:hover {
            color: var(--accent-color);
            text-decoration: underline;
        }
        .breadcrumb-item:not(:last-child)::after {
            content: '>';
            margin-left: 0.5rem;
        }
        .main-container {
            max-width: var(--container-max);
            margin: 2rem auto;
            padding: 0 1.5rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
        }
        @media (max-width: 1024px) {
            .main-container {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background-color: var(--medium-bg);
            border-radius: var(--border-radius);
            padding: 2.5rem;
            box-shadow: var(--shadow);
        }
        .sidebar {
            background-color: var(--medium-bg);
            border-radius: var(--border-radius);
            padding: 1.8rem;
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        h1 {
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            color: var(--text-light);
            line-height: 1.2;
            text-shadow: 0 2px 4px rgba(0,0,0,0.5);
            border-left: 5px solid var(--primary-color);
            padding-left: 1rem;
        }
        h2 {
            font-size: 2rem;
            margin: 2.5rem 0 1.2rem;
            color: var(--accent-color);
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--border-color);
        }
        h3 {
            font-size: 1.5rem;
            margin: 2rem 0 1rem;
            color: var(--text-light);
        }
        h4 {
            font-size: 1.2rem;
            margin: 1.5rem 0 0.8rem;
            color: var(--text-gray);
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.05rem;
        }
        .intro {
            font-size: 1.2rem;
            background: linear-gradient(to right, rgba(0,120,212,0.1), transparent);
            padding: 1.5rem;
            border-radius: var(--border-radius);
            margin-bottom: 2rem;
            border-left: 4px solid var(--primary-color);
        }
        .highlight {
            background-color: rgba(255, 140, 0, 0.1);
            padding: 1.5rem;
            border-radius: var(--border-radius);
            border-left: 4px solid var(--accent-color);
            margin: 2rem 0;
        }
        .key-info {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .info-card {
            background-color: rgba(255,255,255,0.05);
            padding: 1.5rem;
            border-radius: var(--border-radius);
            border-top: 3px solid var(--primary-color);
            transition: var(--transition);
        }
        .info-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 16px rgba(0,0,0,0.4);
        }
        .info-card h4 {
            color: var(--primary-color);
            margin-top: 0;
        }
        ul, ol {
            margin-left: 1.8rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-color);
            text-decoration: underline;
        }
        .article-image {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: var(--border-radius);
            margin: 2rem auto;
            display: block;
            box-shadow: var(--shadow);
            border: 2px solid var(--border-color);
            transition: transform 0.5s ease;
        }
        .article-image:hover {
            transform: scale(1.02);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--text-gray);
            margin-top: -1rem;
            margin-bottom: 2rem;
            font-size: 0.9rem;
        }
        .search-section {
            margin: 3rem 0;
            padding: 2rem;
            background: linear-gradient(135deg, rgba(0,120,212,0.15), rgba(16,124,16,0.15));
            border-radius: var(--border-radius);
            text-align: center;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 1.5rem auto 0;
        }
        .search-input {
            flex: 1;
            padding: 0.9rem 1.2rem;
            border: 2px solid var(--primary-color);
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            background-color: var(--dark-bg);
            color: var(--text-light);
            font-size: 1rem;
        }
        .search-btn {
            padding: 0.9rem 1.8rem;
            background-color: var(--primary-color);
            color: var(--text-light);
            border: none;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-btn:hover {
            background-color: var(--secondary-color);
        }
        .interactive-section {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin: 3rem 0;
        }
        .comment-box, .rating-box {
            background-color: rgba(255,255,255,0.05);
            padding: 2rem;
            border-radius: var(--border-radius);
            border: 1px solid var(--border-color);
        }
        .comment-form, .rating-form {
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        .form-label {
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-input, .form-textarea {
            padding: 0.8rem;
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            background-color: var(--dark-bg);
            color: var(--text-light);
            font-family: inherit;
        }
        .form-textarea {
            min-height: 120px;
            resize: vertical;
        }
        .submit-btn {
            padding: 0.9rem 1.8rem;
            background-color: var(--secondary-color);
            color: var(--text-light);
            border: none;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            align-self: flex-start;
        }
        .submit-btn:hover {
            background-color: var(--primary-color);
            transform: translateY(-2px);
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            margin: 0.5rem 0 1rem;
        }
        .star-rating i {
            color: var(--text-gray);
            cursor: pointer;
            transition: var(--transition);
        }
        .star-rating i:hover,
        .star-rating i.active {
            color: gold;
            transform: scale(1.2);
        }
        .site-footer {
            background-color: #0a0a0a;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
            border-top: 3px solid var(--primary-color);
        }
        .footer-container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 1.5rem;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
        }
        .footer-section h3 {
            color: var(--text-light);
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: var(--text-gray);
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .footer-links a:hover {
            color: var(--accent-color);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: rgba(255,255,255,0.05);
            padding: 1.2rem;
            margin-bottom: 1rem;
            border-radius: var(--border-radius);
            border-left: 4px solid var(--secondary-color);
            transition: var(--transition);
        }
        friend-link:hover {
            background-color: rgba(255,255,255,0.1);
            transform: translateX(5px);
        }
        friend-link a {
            color: var(--text-light);
            font-weight: 600;
            display: block;
        }
        friend-link a:hover {
            text-decoration: none;
            color: var(--accent-color);
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid var(--border-color);
            color: var(--text-gray);
            font-size: 0.9rem;
            grid-column: 1 / -1;
        }
        .last-updated {
            text-align: right;
            font-style: italic;
            color: var(--text-gray);
            margin-bottom: 2rem;
            padding-bottom: 1rem;
            border-bottom: 1px dashed var(--border-color);
        }
        @media (max-width: 768px) {
            html {
                font-size: 15px;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            h3 {
                font-size: 1.3rem;
            }
            .header-container {
                padding: 0 1rem;
            }
            .main-nav {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .mobile-nav {
                display: block;
            }
            .article-content, .sidebar {
                padding: 1.5rem;
            }
            .main-container {
                padding: 0 1rem;
                gap: 1.5rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-input {
                border-radius: var(--border-radius);
                margin-bottom: 0.8rem;
            }
            .search-btn {
                border-radius: var(--border-radius);
                width: 100%;
            }
            .interactive-section {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .key-info {
                grid-template-columns: 1fr;
            }
            .footer-container {
                grid-template-columns: 1fr;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .article-content, .sidebar {
            animation: fadeIn 0.8s ease-out;
        }
        .text-bold {
            font-weight: 700;
            color: var(--accent-color);
        }
        .text-italic {
            font-style: italic;
        }
        .text-center {
            text-align: center;
        }
        .mb-2 {
            margin-bottom: 2rem;
        }
        .mt-2 {
            margin-top: 2rem;
        }