:root {
            --primary: #1a237e;
            --primary-light: #534bae;
            --secondary: #ff9800;
            --secondary-dark: #f57c00;
            --accent: #e91e63;
            --light: #f5f5f7;
            --dark: #121212;
            --gray: #757575;
            --gray-light: #e0e0e0;
            --success: #4caf50;
            --font-heading: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            --font-body: 'Open Sans', Helvetica, Arial, sans-serif;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-body);
            line-height: 1.8;
            color: #333;
            background-color: var(--light);
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            text-decoration: none;
            color: var(--primary);
            transition: color 0.3s ease, background-color 0.3s ease;
        }
        a:hover {
            color: var(--secondary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, var(--primary) 0%, var(--dark) 100%);
            color: white;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }
        .my-logo {
            font-family: var(--font-heading);
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            text-transform: uppercase;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--secondary);
        }
        .my-logo:hover {
            color: var(--secondary);
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 25px;
        }
        .nav-links a {
            color: white;
            font-weight: 600;
            padding: 8px 12px;
            border-radius: 4px;
            position: relative;
        }
        .nav-links a:hover {
            background-color: rgba(255, 255, 255, 0.15);
            color: var(--secondary);
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 50%;
            width: 0;
            height: 2px;
            background: var(--secondary);
            transition: all 0.3s ease;
            transform: translateX(-50%);
        }
        .nav-links a:hover::after {
            width: 80%;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: rgba(255, 255, 255, 0.05);
            padding: 12px 20px;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--secondary);
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: var(--gray-light);
            margin: 0 5px;
        }
        main {
            flex: 1;
            padding: 40px 0;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background: white;
            padding: 40px;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        .article-content h1 {
            font-family: var(--font-heading);
            font-size: 2.8rem;
            color: var(--primary);
            margin-bottom: 20px;
            line-height: 1.2;
            border-bottom: 3px solid var(--secondary);
            padding-bottom: 15px;
        }
        .article-content h2 {
            font-size: 2rem;
            color: var(--primary-light);
            margin: 40px 0 20px;
            padding-bottom: 10px;
            border-bottom: 1px dashed var(--gray-light);
        }
        .article-content h3 {
            font-size: 1.5rem;
            color: var(--dark);
            margin: 30px 0 15px;
        }
        .article-content h4 {
            font-size: 1.2rem;
            color: var(--gray);
            margin: 25px 0 10px;
        }
        .article-content p {
            margin-bottom: 20px;
            text-align: justify;
        }
        .article-content strong {
            color: var(--primary);
            font-weight: 700;
        }
        .article-content em {
            color: var(--accent);
            font-style: italic;
        }
        .intro-box {
            background: linear-gradient(to right, #e3f2fd, #fce4ec);
            border-left: 5px solid var(--secondary);
            padding: 25px;
            margin: 30px 0;
            border-radius: 0 10px 10px 0;
        }
        .highlight {
            background-color: #fff8e1;
            padding: 20px;
            border-radius: 8px;
            border: 1px solid #ffecb3;
            margin: 25px 0;
        }
        .link-list {
            columns: 2;
            column-gap: 40px;
            margin: 30px 0;
        }
        .link-list a {
            display: block;
            padding: 8px 0;
            border-bottom: 1px dotted var(--gray-light);
        }
        .link-list a:hover {
            background-color: #f9f9f9;
            padding-left: 10px;
        }
        .featured-image {
            margin: 40px auto;
            text-align: center;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
            max-width: 800px;
        }
        .featured-image img {
            width: 100%;
            transition: transform 0.5s ease;
        }
        .featured-image:hover img {
            transform: scale(1.02);
        }
        .caption {
            font-size: 0.9rem;
            color: var(--gray);
            padding: 10px;
            background-color: #fafafa;
        }
        .update-time {
            display: inline-block;
            background-color: var(--primary);
            color: white;
            padding: 8px 15px;
            border-radius: 20px;
            font-size: 0.9rem;
            margin: 20px 0;
        }
        .update-time i {
            margin-right: 8px;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .widget {
            background: white;
            padding: 25px;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        .widget h3 {
            font-size: 1.3rem;
            color: var(--primary);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--secondary);
        }
        .search-form, .comment-form, .rating-form {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        .form-group label {
            margin-bottom: 5px;
            font-weight: 600;
            color: var(--dark);
        }
        .form-group input,
        .form-group select,
        .form-group textarea {
            padding: 12px 15px;
            border: 1px solid var(--gray-light);
            border-radius: 6px;
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s ease;
        }
        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 35, 126, 0.1);
        }
        .btn {
            background: linear-gradient(to right, var(--primary), var(--primary-light));
            color: white;
            border: none;
            padding: 14px 20px;
            border-radius: 6px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }
        .btn:hover {
            background: linear-gradient(to right, var(--primary-light), var(--primary));
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            transform: translateY(-2px);
        }
        .btn-secondary {
            background: linear-gradient(to right, var(--secondary), var(--secondary-dark));
        }
        .btn-secondary:hover {
            background: linear-gradient(to right, var(--secondary-dark), var(--secondary));
        }
        .stars {
            display: flex;
            gap: 10px;
            margin: 10px 0;
            direction: rtl;
        }
        .stars input {
            display: none;
        }
        .stars label {
            font-size: 2rem;
            color: var(--gray-light);
            cursor: pointer;
            transition: color 0.2s;
        }
        .stars label:hover,
        .stars label:hover ~ label,
        .stars input:checked ~ label {
            color: var(--secondary);
        }
        footer {
            background-color: var(--dark);
            color: white;
            padding: 50px 0 20px;
            margin-top: 60px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-section h4 {
            font-size: 1.3rem;
            margin-bottom: 25px;
            color: var(--secondary);
            position: relative;
            padding-bottom: 10px;
        }
        .footer-section h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 3px;
            background-color: var(--primary-light);
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #ccc;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: color 0.3s ease, padding-left 0.3s ease;
        }
        .footer-links a:hover {
            color: var(--secondary);
            padding-left: 8px;
        }
        friend-link {
            display: block;
            background-color: rgba(255, 255, 255, 0.05);
            padding: 15px;
            margin: 10px 0;
            border-radius: 6px;
            border-left: 4px solid var(--secondary);
            transition: background-color 0.3s ease;
        }
        friend-link:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }
        friend-link a {
            color: white;
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #444;
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                background-color: var(--primary);
                position: absolute;
                top: 100%;
                left: 0;
                padding: 20px;
                box-shadow: 0 10px 15px rgba(0,0,0,0.2);
            }
            .nav-links.active {
                display: flex;
            }
            .nav-links li {
                margin: 10px 0;
            }
            .article-content {
                padding: 25px;
            }
            .article-content h1 {
                font-size: 2.2rem;
            }
            .article-content h2 {
                font-size: 1.8rem;
            }
            .link-list {
                columns: 1;
            }
            .widget {
                padding: 20px;
            }
        }