* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary-blue: #0056A9;
            --secondary-green: #00A651;
            --accent-red: #E03C31;
            --neutral-dark: #1A1A1A;
            --neutral-light: #F8F9FA;
            --neutral-gray: #6C757D;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            color: var(--neutral-dark);
            background-color: #fff;
            line-height: 1.6;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            color: var(--primary-blue);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-red);
        }
        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: linear-gradient(135deg, var(--primary-blue), var(--secondary-green));
            color: white;
            border: none;
            border-radius: 30px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            text-align: center;
        }
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow);
            color: white;
            background: linear-gradient(135deg, var(--secondary-green), var(--primary-blue));
        }
        .section-padding {
            padding: 60px 0;
        }
        .text-center {
            text-align: center;
        }
        .highlight {
            background-color: rgba(0, 166, 81, 0.1);
            padding: 3px 6px;
            border-radius: 4px;
            font-weight: 600;
        }
        .site-header {
            background-color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .logo a {
            font-size: 1.8rem;
            font-weight: 800;
            background: linear-gradient(to right, var(--primary-blue), var(--secondary-green));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .logo a:hover {
            opacity: 0.9;
        }
        .search-form {
            display: flex;
            flex-grow: 1;
            max-width: 500px;
            margin: 0 30px;
        }
        .search-form input {
            flex-grow: 1;
            padding: 12px 20px;
            border: 2px solid #e0e0e0;
            border-radius: 30px 0 0 30px;
            font-size: 1rem;
            outline: none;
        }
        .search-form button {
            background-color: var(--primary-blue);
            color: white;
            border: none;
            border-radius: 0 30px 30px 0;
            padding: 0 25px;
            cursor: pointer;
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: var(--secondary-green);
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--neutral-dark);
            cursor: pointer;
        }
        .main-nav {
            background-color: var(--neutral-dark);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            justify-content: center;
            flex-wrap: wrap;
        }
        .main-nav li {
            position: relative;
        }
        .main-nav a {
            color: white;
            padding: 18px 22px;
            display: block;
            font-weight: 500;
        }
        .main-nav a:hover,
        .main-nav li.active a {
            background-color: var(--primary-blue);
            color: white;
        }
        .breadcrumb {
            padding: 15px 0;
            background-color: var(--neutral-light);
            font-size: 0.9rem;
        }
        .breadcrumb ul {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li:not(:last-child)::after {
            content: ">";
            margin: 0 10px;
            color: var(--neutral-gray);
        }
        .breadcrumb a {
            color: var(--neutral-gray);
        }
        .breadcrumb a:hover {
            color: var(--primary-blue);
        }
        main {
            flex-grow: 1;
        }
        .article-header {
            padding: 40px 0 30px;
            border-bottom: 1px solid #eee;
        }
        .article-header h1 {
            font-size: 2.8rem;
            margin-bottom: 15px;
            color: var(--neutral-dark);
            line-height: 1.2;
        }
        .article-meta {
            display: flex;
            gap: 20px;
            color: var(--neutral-gray);
            font-size: 0.95rem;
            margin-bottom: 20px;
        }
        .article-meta span {
            display: flex;
            align-items: center;
            gap: 5px;
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 40px 0;
        }
        @media (max-width: 992px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            font-size: 1.1rem;
        }
        .article-content h2 {
            font-size: 2rem;
            margin: 40px 0 20px;
            color: var(--primary-blue);
            padding-bottom: 10px;
            border-bottom: 2px solid #eee;
        }
        .article-content h3 {
            font-size: 1.6rem;
            margin: 30px 0 15px;
            color: var(--secondary-green);
        }
        .article-content h4 {
            font-size: 1.3rem;
            margin: 25px 0 10px;
            color: var(--accent-red);
        }
        .article-content p {
            margin-bottom: 20px;
            text-align: justify;
        }
        .article-content ul, .article-content ol {
            margin-bottom: 20px;
            padding-left: 30px;
        }
        .article-content li {
            margin-bottom: 8px;
        }
        .article-content blockquote {
            border-left: 5px solid var(--secondary-green);
            padding: 20px;
            background-color: var(--neutral-light);
            margin: 30px 0;
            font-style: italic;
            border-radius: 0 10px 10px 0;
        }
        .article-content img {
            border-radius: 10px;
            margin: 30px auto;
            box-shadow: var(--shadow);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--neutral-gray);
            margin-top: -20px;
            margin-bottom: 30px;
            font-size: 0.95rem;
        }
        .internal-link {
            font-weight: 600;
            border-bottom: 1px dashed var(--secondary-green);
        }
        .sidebar {
            position: sticky;
            top: 120px;
            align-self: start;
        }
        .sidebar-widget {
            background-color: var(--neutral-light);
            padding: 25px;
            border-radius: 10px;
            margin-bottom: 30px;
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            font-size: 1.3rem;
            margin-bottom: 20px;
            color: var(--primary-blue);
            padding-bottom: 10px;
            border-bottom: 1px solid #ddd;
        }
        .quick-links ul {
            list-style: none;
            padding-left: 0;
        }
        .quick-links li {
            margin-bottom: 12px;
        }
        .quick-links a {
            display: block;
            padding: 10px 15px;
            background-color: white;
            border-radius: 6px;
            border-left: 4px solid var(--primary-blue);
        }
        .quick-links a:hover {
            background-color: #e8f4ff;
            border-left-color: var(--accent-red);
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 5px;
            margin: 15px 0;
            font-size: 1.8rem;
            color: #FFD700;
            cursor: pointer;
        }
        .stars span:hover,
        .stars span.active {
            color: #FFA500;
        }
        .interaction-form {
            margin-top: 40px;
            padding: 30px;
            background-color: var(--neutral-light);
            border-radius: 10px;
        }
        .interaction-form h3 {
            margin-bottom: 20px;
            color: var(--primary-blue);
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
        }
        .form-control {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: 6px;
            font-size: 1rem;
        }
        textarea.form-control {
            min-height: 120px;
            resize: vertical;
        }
        .site-footer {
            background-color: var(--neutral-dark);
            color: white;
            padding: 60px 0 30px;
            margin-top: 60px;
        }
        .footer-widgets {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            margin-bottom: 40px;
        }
        @media (max-width: 768px) {
            .footer-widgets {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 480px) {
            .footer-widgets {
                grid-template-columns: 1fr;
            }
        }
        .footer-widget h4 {
            font-size: 1.2rem;
            margin-bottom: 20px;
            color: white;
            padding-bottom: 10px;
            border-bottom: 1px solid #444;
        }
        .footer-links ul {
            list-style: none;
            padding-left: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #ccc;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            margin: 15px 0;
            padding: 10px;
            background-color: #333;
            border-radius: 6px;
        }
        friend-link a {
            color: #4da6ff;
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #444;
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .header-top {
                flex-wrap: wrap;
            }
            .search-form {
                order: 3;
                margin: 20px 0 0;
                max-width: 100%;
            }
            .mobile-menu-btn {
                display: block;
            }
            .main-nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: var(--neutral-dark);
                box-shadow: var(--shadow);
            }
            .main-nav.active ul {
                display: flex;
            }
            .main-nav a {
                padding: 15px 20px;
                border-bottom: 1px solid #333;
            }
            .article-header h1 {
                font-size: 2.2rem;
            }
            .article-meta {
                flex-wrap: wrap;
            }
        }
        @media print {
            .site-header, .sidebar, .interaction-form, .site-footer {
                display: none;
            }
            .content-wrapper {
                grid-template-columns: 1fr;
            }
            .article-content {
                font-size: 12pt;
            }
        }