:root {
            --primary-dark: #1a472a;
            --primary-green: #2a623d;
            --accent-amber: #ffaa00;
            --accent-red: #c62828;
            --light-bg: #f4f4f4;
            --dark-text: #222;
            --medium-gray: #666;
            --light-gray: #e0e0e0;
            --white: #ffffff;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
            --border-radius: 8px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            font-size: 16px;
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--dark-text);
            background-color: var(--light-bg);
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            color: var(--primary-green);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-amber);
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-green) 100%);
            color: var(--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: 'Impact', 'Arial Black', sans-serif;
            font-size: 2.2rem;
            letter-spacing: 2px;
            background: linear-gradient(to right, var(--accent-amber), #ffdd40);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-shadow: 0 2px 4px rgba(0,0,0,0.3);
        }
        .my-logo a {
            color: transparent;
            text-decoration: none;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: var(--white);
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover {
            color: var(--accent-amber);
            text-decoration: none;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--accent-amber);
            transition: width 0.3s;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: var(--white);
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: var(--white);
            border-bottom: 1px solid var(--light-gray);
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '/';
            margin: 0 10px;
            color: var(--medium-gray);
        }
        .breadcrumb a {
            color: var(--medium-gray);
        }
        .breadcrumb a:hover {
            color: var(--primary-green);
        }
        .search-section {
            background-color: var(--white);
            padding: 2rem 0;
            text-align: center;
            border-bottom: 1px solid var(--light-gray);
        }
        .search-form {
            max-width: 600px;
            margin: 0 auto;
            display: flex;
            border-radius: 50px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .search-input {
            flex-grow: 1;
            padding: 1rem 1.5rem;
            border: none;
            font-size: 1rem;
            outline: none;
        }
        .search-button {
            background-color: var(--primary-green);
            color: var(--white);
            border: none;
            padding: 0 1.8rem;
            cursor: pointer;
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .search-button:hover {
            background-color: var(--primary-dark);
        }
        .main-content {
            flex: 1;
            padding: 3rem 0;
        }
        .article-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        @media (max-width: 992px) {
            .article-grid {
                grid-template-columns: 1fr;
            }
        }
        article {
            background-color: var(--white);
            padding: 2.5rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .article-header {
            margin-bottom: 2rem;
            padding-bottom: 1.5rem;
            border-bottom: 2px solid var(--light-gray);
        }
        .article-header h1 {
            font-size: 2.8rem;
            color: var(--primary-dark);
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--medium-gray);
            font-size: 0.9rem;
        }
        .update-time {
            color: var(--accent-red);
            font-weight: bold;
        }
        .article-body h2 {
            font-size: 2rem;
            color: var(--primary-green);
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px dashed var(--light-gray);
        }
        .article-body h3 {
            font-size: 1.6rem;
            color: var(--primary-dark);
            margin: 2rem 0 1rem;
        }
        .article-body h4 {
            font-size: 1.3rem;
            color: var(--medium-gray);
            margin: 1.5rem 0 0.8rem;
        }
        .article-body p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .article-body strong {
            color: var(--primary-dark);
            font-weight: 700;
        }
        .article-body em {
            color: var(--accent-red);
            font-style: italic;
        }
        .highlight-box {
            background-color: #f0f7f0;
            border-left: 5px solid var(--primary-green);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .video-showcase {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1.5rem;
            margin: 2.5rem 0;
        }
        .video-card {
            background: var(--light-bg);
            border-radius: var(--border-radius);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: 0 3px 8px rgba(0,0,0,0.08);
        }
        .video-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        }
        .video-thumb {
            height: 160px;
            background-color: var(--medium-gray);
            background-image: url('https://images.unsplash.com/photo-1589256469067-ea99122bbdc4?ixlib=rb-4.0.3&auto=format&fit=crop&w=800&q=80');
            background-size: cover;
            background-position: center;
        }
        .video-info {
            padding: 1.2rem;
        }
        .video-info h4 {
            margin-top: 0;
        }
        .featured-image {
            margin: 2.5rem auto;
            text-align: center;
        }
        .featured-image img {
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            max-height: 500px;
            object-fit: cover;
        }
        .img-caption {
            font-style: italic;
            color: var(--medium-gray);
            margin-top: 0.5rem;
            font-size: 0.9rem;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background-color: var(--white);
            padding: 1.5rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            color: var(--primary-green);
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid var(--light-gray);
        }
        .user-rating {
            text-align: center;
        }
        .stars {
            font-size: 1.8rem;
            color: var(--light-gray);
            margin: 1rem 0;
            cursor: pointer;
        }
        .stars .active {
            color: var(--accent-amber);
        }
        .rating-submit {
            background-color: var(--primary-green);
            color: white;
            border: none;
            padding: 0.7rem 1.5rem;
            border-radius: 50px;
            cursor: pointer;
            margin-top: 1rem;
            transition: var(--transition);
        }
        .rating-submit:hover {
            background-color: var(--primary-dark);
        }
        .comments-section {
            margin-top: 3rem;
            background-color: var(--white);
            padding: 2.5rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .comments-section h2 {
            color: var(--primary-green);
            margin-bottom: 1.5rem;
        }
        .comment-form {
            display: grid;
            gap: 1rem;
            margin-bottom: 2.5rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        .form-group label {
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-group input,
        .form-group textarea {
            padding: 0.8rem;
            border: 1px solid var(--light-gray);
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
        }
        .form-group textarea {
            min-height: 120px;
            resize: vertical;
        }
        .comment-submit {
            background-color: var(--primary-green);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-size: 1.1rem;
            justify-self: start;
            transition: var(--transition);
        }
        .comment-submit:hover {
            background-color: var(--primary-dark);
        }
        .site-footer {
            background-color: var(--primary-dark);
            color: var(--white);
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
        }
        .footer-logo {
            font-size: 1.8rem;
            margin-bottom: 1rem;
        }
        .footer-links h4 {
            color: var(--accent-amber);
            margin-bottom: 1.2rem;
            font-size: 1.2rem;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.7rem;
        }
        .footer-links a {
            color: #ccc;
        }
        .footer-links a:hover {
            color: var(--accent-amber);
        }
        friend-link {
            display: block;
            padding: 0.5rem 0;
            border-top: 1px solid rgba(255,255,255,0.1);
            margin-top: 1rem;
        }
        friend-link a {
            color: #90caf9;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.2);
            font-size: 0.9rem;
            color: #aaa;
        }
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
            }
            .main-nav {
                display: none;
                width: 100%;
                order: 3;
                margin-top: 1rem;
            }
            .main-nav.active {
                display: block;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
            }
            .main-nav li {
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
            .main-nav a {
                display: block;
                padding: 1rem 0;
            }
            .article-header h1 {
                font-size: 2.2rem;
            }
            .article-body h2 {
                font-size: 1.8rem;
            }
            .article-body h3 {
                font-size: 1.5rem;
            }
            article, .comments-section {
                padding: 1.5rem;
            }
        }