:root {
            --primary: #4361ee;
            --secondary: #3a0ca3;
            --accent: #f72585;
            --light: #f8f9fa;
            --dark: #212529;
            --gray: #6c757d;
            --shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            --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: var(--dark);
            background-color: #fff;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        ul { list-style: none; }
        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: var(--primary);
            color: white;
            border-radius: 50px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn:hover {
            background: var(--secondary);
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }
        .site-header {
            background: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i { color: var(--accent); }
        .main-nav ul {
            display: flex;
            gap: 30px;
        }
        .main-nav a {
            font-weight: 600;
            color: var(--dark);
            padding: 5px 0;
            position: relative;
        }
        .main-nav a:hover {
            color: var(--primary);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: width 0.3s;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--dark);
        }
        .breadcrumb {
            background: #f1f3f9;
            padding: 15px 20px;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '/';
            margin-left: 10px;
            color: var(--gray);
        }
        .breadcrumb a:hover { color: var(--accent); }
        .article-hero {
            text-align: center;
            padding: 50px 20px 30px;
            background: linear-gradient(135deg, #f5f7ff 0%, #e3e9ff 100%);
            border-bottom: 3px solid var(--primary);
        }
        .article-hero h1 {
            font-size: 2.8rem;
            color: var(--secondary);
            margin-bottom: 20px;
            line-height: 1.2;
        }
        .article-hero .meta {
            color: var(--gray);
            font-size: 0.95rem;
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        .article-content {
            padding: 40px 20px;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        @media (max-width: 992px) {
            .article-content {
                grid-template-columns: 1fr;
            }
        }
        .main-content h2 {
            font-size: 2rem;
            color: var(--secondary);
            margin: 40px 0 20px;
            padding-bottom: 10px;
            border-bottom: 2px dashed #ddd;
        }
        .main-content h3 {
            font-size: 1.6rem;
            color: var(--primary);
            margin: 30px 0 15px;
        }
        .main-content h4 {
            font-size: 1.3rem;
            color: #555;
            margin: 25px 0 10px;
        }
        .main-content p {
            margin-bottom: 1.5em;
            font-size: 1.05rem;
            text-align: justify;
        }
        .main-content strong {
            color: var(--secondary);
            font-weight: 700;
        }
        .main-content emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .featured-img {
            margin: 30px 0;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .featured-img figcaption {
            text-align: center;
            font-style: italic;
            padding: 10px;
            color: var(--gray);
            background: #f9f9f9;
        }
        .interactive-box {
            background: #eef2ff;
            border-left: 5px solid var(--primary);
            padding: 25px;
            margin: 30px 0;
            border-radius: 0 10px 10px 0;
        }
        .interactive-box h4 { margin-top: 0; }
        .sidebar-widget {
            background: white;
            border-radius: 10px;
            padding: 25px;
            margin-bottom: 30px;
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            font-size: 1.3rem;
            color: var(--secondary);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 1px solid #eee;
        }
        .search-form, .comment-form, .rating-form {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .form-group { display: flex; flex-direction: column; }
        .form-group label {
            font-weight: 600;
            margin-bottom: 5px;
            color: var(--dark);
        }
        .form-control {
            padding: 12px 15px;
            border: 1px solid #ced4da;
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
        }
        textarea.form-control { min-height: 120px; resize: vertical; }
        .stars {
            display: flex;
            gap: 10px;
            font-size: 1.8rem;
            color: #ffc107;
            cursor: pointer;
        }
        .stars i { transition: var(--transition); }
        .stars i:hover { transform: scale(1.2); }
        .link-list a {
            display: block;
            padding: 12px 15px;
            margin-bottom: 10px;
            background: #f8f9fa;
            border-radius: 8px;
            border-left: 4px solid var(--primary);
        }
        .link-list a:hover {
            background: #e9ecef;
            border-left-color: var(--accent);
            padding-left: 20px;
        }
        .site-footer {
            background: var(--dark);
            color: white;
            padding: 50px 20px 20px;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-widget h4 {
            font-size: 1.3rem;
            margin-bottom: 20px;
            color: #fff;
        }
        friend-link {
            display: block;
            padding: 8px 0;
            color: #ccc;
            border-bottom: 1px dotted #444;
        }
        friend-link:hover {
            color: var(--accent);
            padding-left: 5px;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #444;
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .header-container { flex-wrap: wrap; }
            .main-nav {
                width: 100%;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.5s ease;
            }
            .main-nav.active {
                max-height: 300px;
                margin-top: 20px;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
            }
            .main-nav li { border-bottom: 1px solid #eee; }
            .main-nav a {
                display: block;
                padding: 15px;
            }
            .hamburger { display: block; }
            .article-hero h1 { font-size: 2.2rem; }
            .main-content h2 { font-size: 1.8rem; }
            .main-content h3 { font-size: 1.5rem; }
        }