:root {
            --primary: #1a237e;
            --primary-light: #534bae;
            --primary-dark: #000051;
            --secondary: #ff5722;
            --secondary-light: #ff8a50;
            --secondary-dark: #c41c00;
            --text-light: #f5f5f5;
            --text-dark: #212121;
            --bg-light: #ffffff;
            --bg-dark: #121212;
            --gray-light: #e0e0e0;
            --gray-mid: #757575;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: var(--bg-light);
            color: var(--text-dark);
            line-height: 1.7;
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            color: var(--text-light);
            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-size: 2.2rem;
            font-weight: 800;
            letter-spacing: 1px;
            background: linear-gradient(to right, var(--secondary-light), #ffeb3b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
        }
        .my-logo a {
            background: none;
            -webkit-text-fill-color: unset;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: var(--text-light);
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .main-nav a:hover {
            color: var(--secondary-light);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--secondary);
            transition: var(--transition);
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 6px;
            padding: 5px;
        }
        .hamburger span {
            width: 30px;
            height: 4px;
            background-color: var(--text-light);
            border-radius: 2px;
            transition: var(--transition);
        }
        .breadcrumb {
            background-color: var(--gray-light);
            padding: 1rem 0;
            font-size: 0.95rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin-left: 0.5rem;
            color: var(--gray-mid);
        }
        main {
            padding: 2rem 0 4rem;
            min-height: 100vh;
        }
        article {
            background-color: var(--bg-light);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow);
            margin-bottom: 2rem;
        }
        .article-header {
            padding: 3rem 2rem;
            background: linear-gradient(rgba(26, 35, 126, 0.85), rgba(0, 0, 81, 0.9)), url('https://images.unsplash.com/photo-1551524165-6b6e5a6166f3?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80') center/cover no-repeat;
            color: var(--text-light);
            text-align: center;
        }
        .article-header h1 {
            font-size: 3.2rem;
            margin-bottom: 1rem;
            text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.5);
        }
        .article-header p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto;
            opacity: 0.9;
        }
        .article-meta {
            display: flex;
            justify-content: center;
            gap: 2rem;
            margin-top: 1.5rem;
            font-size: 0.95rem;
            color: var(--gray-light);
        }
        .article-content {
            padding: 2.5rem;
        }
        .article-content > * + * {
            margin-top: 1.8rem;
        }
        .article-content h2 {
            color: var(--primary-dark);
            font-size: 2.3rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid var(--secondary);
            margin-top: 3rem;
        }
        .article-content h3 {
            color: var(--primary);
            font-size: 1.8rem;
            margin-top: 2.5rem;
        }
        .article-content h4 {
            color: var(--primary-light);
            font-size: 1.5rem;
            margin-top: 2rem;
        }
        .article-content p {
            font-size: 1.15rem;
            text-align: justify;
            hyphens: auto;
        }
        .article-content strong {
            color: var(--secondary-dark);
            font-weight: 700;
        }
        .article-content em {
            color: var(--primary-light);
            font-style: italic;
        }
        .highlight-box {
            background: linear-gradient(to right, #e3f2fd, #f3e5f5);
            border-left: 6px solid var(--secondary);
            padding: 1.5rem;
            border-radius: 0 8px 8px 0;
            margin: 2rem 0;
        }
        .image-wrapper {
            margin: 2.5rem auto;
            text-align: center;
            max-width: 100%;
        }
        .image-wrapper img {
            max-width: 100%;
            height: auto;
            border-radius: 12px;
            box-shadow: var(--shadow);
            transition: transform 0.5s ease;
        }
        .image-wrapper img:hover {
            transform: scale(1.02);
        }
        .image-caption {
            font-style: italic;
            color: var(--gray-mid);
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .interactive-section {
            background-color: #f9f9f9;
            border-radius: 12px;
            padding: 2rem;
            margin: 3rem 0;
            border: 1px solid var(--gray-light);
        }
        .interactive-section h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .interactive-section form {
            display: grid;
            gap: 1.2rem;
            margin-top: 1.5rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        .form-group label {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--primary-dark);
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            padding: 0.8rem 1rem;
            border: 2px solid var(--gray-light);
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 35, 126, 0.1);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.7rem;
            padding: 0.9rem 2rem;
            background: linear-gradient(to right, var(--primary), var(--primary-light));
            color: white;
            border: none;
            border-radius: 8px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            width: fit-content;
        }
        .btn:hover {
            background: linear-gradient(to right, var(--primary-dark), var(--primary));
            transform: translateY(-3px);
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
        }
        .btn-secondary {
            background: linear-gradient(to right, var(--secondary), var(--secondary-light));
        }
        .btn-secondary:hover {
            background: linear-gradient(to right, var(--secondary-dark), var(--secondary));
        }
        .rating {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .rating input {
            display: none;
        }
        .rating label {
            font-size: 2rem;
            color: var(--gray-light);
            cursor: pointer;
            transition: var(--transition);
        }
        .rating input:checked ~ label,
        .rating label:hover,
        .rating label:hover ~ label {
            color: #ffc107;
        }
        footer {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            color: var(--text-light);
            padding: 3rem 0 1.5rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-section h3 {
            font-size: 1.5rem;
            margin-bottom: 1.5rem;
            position: relative;
            padding-bottom: 0.7rem;
        }
        .footer-section h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 3px;
            background: var(--secondary);
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li + li {
            margin-top: 0.8rem;
        }
        .footer-links a {
            color: var(--gray-light);
            display: flex;
            align-items: center;
            gap: 0.7rem;
        }
        .footer-links a:hover {
            color: var(--secondary-light);
            padding-left: 5px;
        }
        friend-link {
            display: inline-block;
            background-color: rgba(255, 255, 255, 0.1);
            padding: 0.6rem 1.2rem;
            border-radius: 6px;
            margin: 0.3rem;
            border: 1px solid rgba(255, 255, 255, 0.2);
            transition: var(--transition);
        }
        friend-link:hover {
            background-color: rgba(255, 87, 34, 0.2);
            border-color: var(--secondary);
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
            color: var(--gray-light);
        }
        @media (max-width: 992px) {
            .article-header h1 {
                font-size: 2.7rem;
            }
            .article-content h2 {
                font-size: 2rem;
            }
            .article-content h3 {
                font-size: 1.6rem;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: flex;
            }
            .main-nav ul {
                position: fixed;
                top: 80px;
                left: 0;
                width: 100%;
                background-color: var(--primary-dark);
                flex-direction: column;
                align-items: center;
                padding: 2rem 0;
                gap: 1.5rem;
                clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
                transition: clip-path 0.4s ease;
                z-index: 999;
                box-shadow: var(--shadow);
            }
            .main-nav.active ul {
                clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
            }
            .hamburger.active span:nth-child(1) {
                transform: rotate(45deg) translate(8px, 8px);
            }
            .hamburger.active span:nth-child(2) {
                opacity: 0;
            }
            .hamburger.active span:nth-child(3) {
                transform: rotate(-45deg) translate(7px, -7px);
            }
            .header-container {
                padding: 0 15px;
            }
            .article-header {
                padding: 2rem 1rem;
            }
            .article-header h1 {
                font-size: 2.2rem;
            }
            .article-content {
                padding: 1.8rem;
            }
            .article-content h2 {
                font-size: 1.8rem;
            }
            .footer-content {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .article-header h1 {
                font-size: 1.9rem;
            }
            .article-meta {
                flex-direction: column;
                gap: 0.7rem;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
        }