* { margin: 0; padding: 0; box-sizing: border-box; }
        :root {
            --primary: #2c3e50; --secondary: #16a085; --accent: #e74c3c;
            --light: #ecf0f1; --dark: #2c3e50; --gray: #7f8c8d;
            --shadow: 0 4px 12px rgba(0,0,0,0.1); --transition: all 0.3s ease;
        }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7; color: #333; background: #f9f9f9;
            display: flex; flex-direction: column; min-height: 100vh;
        }
        a { text-decoration: none; color: var(--secondary); }
        a:hover { color: var(--accent); }
        img { max-width: 100%; height: auto; display: block; }
        ul { list-style: none; }
        .container {
            width: 100%; max-width: 1200px; margin: 0 auto;
            padding: 0 20px;
        }
        .btn {
            display: inline-block; padding: 12px 24px;
            background: var(--secondary); color: white;
            border: none; border-radius: 4px; cursor: pointer;
            font-weight: 600; transition: var(--transition);
        }
        .btn:hover { background: #1abc9c; transform: translateY(-2px); }
        header { background: white; box-shadow: var(--shadow); position: sticky; top: 0; z-index: 1000; }
        .header-top { padding: 15px 0; border-bottom: 1px solid #eee; }
        .header-top .container {
            display: flex; justify-content: space-between; align-items: center;
        }
        .my-logo {
            font-size: 2rem; font-weight: 800; color: var(--primary);
            font-family: 'Trebuchet MS', sans-serif;
            text-shadow: 1px 1px 3px rgba(0,0,0,0.2);
        }
        .my-logo span { color: var(--secondary); }
        .search-form { display: flex; width: 100%; max-width: 400px; }
        .search-form input {
            flex: 1; padding: 10px 15px; border: 1px solid #ddd;
            border-radius: 4px 0 0 4px; font-size: 1rem;
        }
        .search-form button {
            padding: 10px 20px; background: var(--primary); color: white;
            border: none; border-radius: 0 4px 4px 0; cursor: pointer;
        }
        nav { background: var(--primary); }
        .nav-container {
            display: flex; justify-content: space-between; align-items: center;
            position: relative;
        }
        .nav-links { display: flex; }
        .nav-links li { position: relative; }
        .nav-links a {
            color: white; padding: 18px 20px; display: block;
            font-weight: 500; transition: var(--transition);
        }
        .nav-links a:hover { background: var(--secondary); }
        .hamburger {
            display: none; font-size: 1.5rem; color: white;
            background: none; border: none; cursor: pointer;
            padding: 10px;
        }
        .breadcrumb {
            padding: 12px 0; background: #f1f1f1; font-size: 0.9rem;
        }
        .breadcrumb a { color: var(--gray); }
        .breadcrumb a:hover { color: var(--secondary); }
        .breadcrumb span { color: var(--dark); margin: 0 5px; }
        main { flex: 1; padding: 40px 0; }
        .article-header { text-align: center; margin-bottom: 40px; }
        .article-header h1 {
            font-size: 2.8rem; color: var(--primary); margin-bottom: 20px;
            line-height: 1.2;
        }
        .meta {
            color: var(--gray); font-size: 0.95rem;
            display: flex; justify-content: center; gap: 20px;
            margin-bottom: 10px;
        }
        .content-area {
            display: grid; grid-template-columns: 1fr 300px; gap: 40px;
        }
        .article-content {
            background: white; padding: 40px; border-radius: 8px;
            box-shadow: var(--shadow);
        }
        .article-content h2 {
            color: var(--primary); margin: 35px 0 20px;
            padding-bottom: 10px; border-bottom: 2px solid var(--light);
        }
        .article-content h3 {
            color: var(--secondary); margin: 30px 0 15px;
        }
        .article-content h4 {
            color: var(--dark); margin: 25px 0 10px;
        }
        .article-content p {
            margin-bottom: 20px; text-align: justify;
        }
        .article-content strong { color: var(--dark); }
        .highlight-box {
            background: #e8f4f3; border-left: 4px solid var(--secondary);
            padding: 20px; margin: 25px 0; border-radius: 0 4px 4px 0;
        }
        .image-caption {
            text-align: center; font-style: italic; color: var(--gray);
            margin-top: 10px; font-size: 0.9rem;
        }
        .internal-links {
            background: #f8f9fa; padding: 25px; margin: 30px 0;
            border-radius: 8px;
        }
        .internal-links h3 { margin-top: 0; }
        .internal-links ul { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
        .internal-links li { padding: 5px 0; }
        .internal-links a { font-weight: 500; }
        .sidebar .widget {
            background: white; padding: 25px; margin-bottom: 30px;
            border-radius: 8px; box-shadow: var(--shadow);
        }
        .widget h3 {
            color: var(--primary); margin-bottom: 20px;
            padding-bottom: 10px; border-bottom: 1px solid #eee;
        }
        .rating-widget form { display: flex; flex-direction: column; gap: 15px; }
        .rating-stars { display: flex; gap: 5px; font-size: 1.8rem; color: #ffc107; }
        .rating-stars i { cursor: pointer; }
        .comment-widget textarea, .comment-widget input {
            width: 100%; padding: 12px; border: 1px solid #ddd;
            border-radius: 4px; margin-bottom: 15px;
        }
        footer { background: var(--primary); color: white; padding: 50px 0 20px; }
        .footer-content {
            display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px;
        }
        .footer-col h4 {
            color: white; margin-bottom: 25px; font-size: 1.2rem;
        }
        .footer-col ul li { margin-bottom: 12px; }
        .footer-col a { color: #bdc3c7; }
        .footer-col a:hover { color: white; }
        friend-link {
            display: block; margin: 5px 0; padding: 8px;
            background: rgba(255,255,255,0.05); border-radius: 4px;
        }
        .copyright {
            text-align: center; padding-top: 30px; margin-top: 30px;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #bdc3c7; font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .content-area { grid-template-columns: 1fr; }
            .footer-content { grid-template-columns: repeat(2, 1fr); }
            .article-header h1 { font-size: 2.4rem; }
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .nav-links {
                position: fixed; top: 70px; left: -100%; background: var(--primary);
                width: 100%; flex-direction: column; transition: 0.5s;
                box-shadow: var(--shadow); z-index: 999;
            }
            .nav-links.active { left: 0; }
            .nav-links a { padding: 15px 20px; border-bottom: 1px solid rgba(255,255,255,0.1); }
            .internal-links ul { grid-template-columns: 1fr; }
            .footer-content { grid-template-columns: 1fr; }
            .article-header h1 { font-size: 2rem; }
        }