* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary-color: #1a237e; 
            --secondary-color: #ff9800; 
            --accent-color: #4caf50; 
            --background-color: #f5f5f5;
            --text-color: #333;
            --light-gray: #e0e0e0;
            --dark-gray: #616161;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        body {
            background-color: var(--background-color);
            color: var(--text-color);
            line-height: 1.8;
            font-size: 18px;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary-color), #0d47a1);
            color: white;
            padding: 1.5rem 2rem;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1400px;
            margin: 0 auto;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            text-transform: uppercase;
            letter-spacing: 2px;
            text-decoration: none;
            color: white;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .my-logo:hover {
            color: var(--secondary-color);
            transform: scale(1.05);
        }
        .my-logo i {
            font-size: 2.5rem;
        }
        .breadcrumb {
            padding: 1rem 2rem;
            background-color: var(--light-gray);
            font-size: 0.95rem;
            color: var(--dark-gray);
            max-width: 1400px;
            margin: 0 auto;
        }
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2.5rem;
        }
        .main-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 0.8rem 1.2rem;
            border-radius: 8px;
            transition: var(--transition);
        }
        .main-nav a:hover,
        .main-nav a.active {
            background-color: var(--secondary-color);
            color: var(--primary-color);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .main-content {
            max-width: 1400px;
            margin: 3rem auto;
            padding: 0 2rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        .article-content {
            background: white;
            padding: 3rem;
            border-radius: 16px;
            box-shadow: var(--shadow);
        }
        .sidebar {
            background: white;
            padding: 2rem;
            border-radius: 16px;
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 150px;
        }
        h1 {
            font-size: 3.2rem;
            color: var(--primary-color);
            margin-bottom: 2rem;
            border-bottom: 5px solid var(--secondary-color);
            padding-bottom: 1rem;
            line-height: 1.3;
        }
        h2 {
            font-size: 2.4rem;
            color: var(--primary-color);
            margin: 3rem 0 1.5rem;
            padding-left: 1rem;
            border-left: 6px solid var(--accent-color);
        }
        h3 {
            font-size: 1.8rem;
            color: var(--dark-gray);
            margin: 2.5rem 0 1rem;
        }
        h4 {
            font-size: 1.4rem;
            color: var(--secondary-color);
            margin: 2rem 0 1rem;
        }
        p {
            margin-bottom: 1.8rem;
            text-align: justify;
            font-size: 1.1rem;
        }
        .lead {
            font-size: 1.4rem;
            font-weight: 600;
            color: var(--primary-color);
            background-color: #e3f2fd;
            padding: 1.5rem;
            border-radius: 10px;
            margin-bottom: 2.5rem;
            border-left: 6px solid var(--secondary-color);
        }
        strong {
            color: var(--primary-color);
            font-weight: 800;
        }
        em {
            color: var(--accent-color);
            font-style: italic;
        }
        .highlight {
            background-color: #fff9c4;
            padding: 0.3rem 0.6rem;
            border-radius: 4px;
            font-weight: bold;
        }
        .section-divider {
            height: 3px;
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            margin: 3rem 0;
            border: none;
        }
        .featured-image {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: 12px;
            margin: 2.5rem 0;
            border: 5px solid var(--light-gray);
            transition: var(--transition);
        }
        .featured-image:hover {
            transform: scale(1.01);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
        }
        a.content-link {
            color: var(--secondary-color);
            text-decoration: none;
            font-weight: 700;
            border-bottom: 2px dotted var(--secondary-color);
            padding-bottom: 2px;
            transition: var(--transition);
        }
        a.content-link:hover {
            color: var(--primary-color);
            border-bottom: 2px solid var(--primary-color);
        }
        .form-container {
            background-color: #f9f9f9;
            padding: 2rem;
            border-radius: 12px;
            margin: 3rem 0;
            border: 2px solid var(--light-gray);
        }
        .form-title {
            font-size: 1.8rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--dark-gray);
        }
        .form-control {
            width: 100%;
            padding: 1rem;
            border: 2px solid var(--light-gray);
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            outline: none;
            border-color: var(--secondary-color);
            box-shadow: 0 0 0 3px rgba(255, 152, 0, 0.2);
        }
        .btn {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 1rem 2.5rem;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .btn:hover {
            background-color: var(--primary-color);
            transform: translateY(-3px);
        }
        .rating-stars {
            display: flex;
            gap: 10px;
            margin: 1rem 0;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            font-size: 2rem;
            color: var(--light-gray);
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-stars label:hover,
        .rating-stars input:checked ~ label {
            color: #ffc107;
        }
        .widget {
            margin-bottom: 2.5rem;
        }
        .widget-title {
            font-size: 1.5rem;
            color: var(--primary-color);
            margin-bottom: 1.2rem;
            padding-bottom: 0.8rem;
            border-bottom: 3px solid var(--secondary-color);
        }
        .update-time {
            background-color: #e8f5e9;
            padding: 1.5rem;
            border-radius: 10px;
            text-align: center;
            font-weight: bold;
            color: var(--accent-color);
            border: 2px dashed var(--accent-color);
        }
        .site-footer {
            background-color: #263238;
            color: white;
            padding: 3rem 2rem;
            margin-top: 5rem;
        }
        .footer-container {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
        }
        .footer-section h3 {
            color: var(--secondary-color);
            font-size: 1.6rem;
            margin-bottom: 1.5rem;
        }
        friend-link {
            display: block;
            margin-bottom: 1rem;
        }
        friend-link a {
            color: #bbdefb;
            text-decoration: none;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        friend-link a:hover {
            color: white;
            padding-left: 10px;
        }
        .copyright {
            text-align: center;
            padding: 2rem;
            background-color: #1c2526;
            color: #b0bec5;
            font-size: 0.95rem;
            margin-top: 3rem;
        }
        @media (max-width: 1024px) {
            .main-content {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .sidebar {
                position: static;
            }
        }
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            .main-nav ul {
                display: none;
                flex-direction: column;
                width: 100%;
                background-color: var(--primary-color);
                position: absolute;
                top: 100%;
                left: 0;
                padding: 1.5rem;
                box-shadow: var(--shadow);
                border-radius: 0 0 12px 12px;
            }
            .main-nav.active ul {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            h1 {
                font-size: 2.5rem;
            }
            h2 {
                font-size: 2rem;
            }
            h3 {
                font-size: 1.6rem;
            }
            .article-content {
                padding: 2rem;
            }
            .breadcrumb {
                padding: 1rem;
                font-size: 0.85rem;
            }
        }
        @media (max-width: 480px) {
            .site-header {
                padding: 1rem;
            }
            .my-logo {
                font-size: 1.8rem;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
            .form-container {
                padding: 1.5rem;
            }
        }
        .hover-card {
            transition: var(--transition);
            padding: 1.5rem;
            border-radius: 10px;
            background: white;
            border: 2px solid transparent;
        }
        .hover-card:hover {
            border-color: var(--secondary-color);
            box-shadow: var(--shadow);
            transform: translateY(-5px);
        }