* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f8f9fa;
            max-width: 100vw;
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            width: 90%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }
        .site-header {
            background: linear-gradient(135deg, #1a237e 0%, #283593 100%);
            color: #fff;
            padding: 1rem 0;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: transform 0.3s ease;
        }
        .my-logo:hover {
            transform: scale(1.05);
        }
        .my-logo span {
            color: #ffc107;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: #e8eaf6;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
            transition: color 0.3s;
        }
        .main-nav a:hover,
        .main-nav a:focus {
            color: #ffc107;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: #ffc107;
            transition: width 0.3s;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #e8eaf6;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin: 0 10px;
            color: #5c6bc0;
        }
        .breadcrumb a {
            color: #3949ab;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .main-content {
            padding: 2rem 0;
            background-color: #fff;
            box-shadow: 0 0 20px rgba(0, 0, 0, 0.05);
            border-radius: 8px;
            margin-top: 1rem;
        }
        article {
            padding: 0 2rem;
        }
        h1 {
            font-size: 2.8rem;
            color: #1a237e;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid #ffc107;
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 2rem;
            color: #283593;
            margin: 2.5rem 0 1rem;
            padding-top: 1rem;
        }
        h3 {
            font-size: 1.5rem;
            color: #3949ab;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.2rem;
            color: #5c6bc0;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            hyphens: auto;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 500;
            color: #555;
            background-color: #f3f4fd;
            padding: 1.5rem;
            border-left: 4px solid #3949ab;
            border-radius: 0 8px 8px 0;
            margin-bottom: 2rem;
        }
        strong {
            color: #1a237e;
            font-weight: 700;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .content-link {
            color: #3949ab;
            text-decoration: none;
            border-bottom: 1px dotted #5c6bc0;
            transition: all 0.3s;
        }
        .content-link:hover {
            color: #ff5722;
            border-bottom-style: solid;
            background-color: #fff8e1;
        }
        figure {
            margin: 2.5rem auto;
            text-align: center;
            max-width: 800px;
        }
        figure img {
            border-radius: 8px;
            box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
            transition: transform 0.5s ease, box-shadow 0.5s ease;
        }
        figure img:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 20px rgba(0, 0, 0, 0.15);
        }
        figcaption {
            font-style: italic;
            color: #666;
            margin-top: 0.8rem;
            font-size: 0.95rem;
        }
        .interactive-section {
            background: linear-gradient(to bottom right, #f3f4fd, #e8eaf6);
            border-radius: 12px;
            padding: 2rem;
            margin: 3rem 0;
            border: 1px solid #d1d9ff;
        }
        .interactive-section h3 {
            margin-top: 0;
            color: #1a237e;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #333;
        }
        .form-control {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 1px solid #bdbdbd;
            border-radius: 6px;
            font-size: 1rem;
            transition: border-color 0.3s, box-shadow 0.3s;
        }
        .form-control:focus {
            outline: none;
            border-color: #3949ab;
            box-shadow: 0 0 0 3px rgba(57, 73, 171, 0.2);
        }
        .btn {
            display: inline-block;
            background: linear-gradient(to right, #3949ab, #283593);
            color: white;
            padding: 0.9rem 2rem;
            border: none;
            border-radius: 6px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            text-align: center;
        }
        .btn:hover {
            background: linear-gradient(to right, #303f9f, #1a237e);
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
        }
        .rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 5px;
            margin: 1rem 0;
        }
        .rating input {
            display: none;
        }
        .rating label {
            color: #ccc;
            font-size: 2rem;
            cursor: pointer;
            transition: color 0.3s;
        }
        .rating input:checked ~ label,
        .rating label:hover,
        .rating label:hover ~ label {
            color: #ffc107;
        }
        .site-footer {
            background-color: #1a237e;
            color: #e8eaf6;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 {
            color: #ffc107;
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #c5cae9;
            text-decoration: none;
            transition: color 0.3s, padding-left 0.3s;
        }
        .footer-links a:hover {
            color: #ffc107;
            padding-left: 5px;
        }
        friend-link {
            display: inline-block;
            background-color: rgba(255, 255, 255, 0.1);
            padding: 0.5rem 1rem;
            border-radius: 4px;
            margin: 0.3rem;
            color: #ffc107;
            text-decoration: none;
            transition: background-color 0.3s;
        }
        friend-link:hover {
            background-color: rgba(255, 255, 255, 0.2);
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #3949ab;
            font-size: 0.9rem;
            color: #9fa8da;
        }
        @media (max-width: 768px) {
            .header-content {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
            }
            .main-nav {
                width: 100%;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.5s ease;
            }
            .main-nav.active {
                max-height: 300px;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
                padding: 1rem 0;
            }
            .main-nav li {
                width: 100%;
            }
            .main-nav a {
                display: block;
                padding: 0.8rem 0;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            }
            .main-nav a::after {
                display: none;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            article {
                padding: 0 1rem;
            }
            .interactive-section {
                padding: 1.5rem;
            }
        }
        @media print {
            .site-header,
            .interactive-section,
            .site-footer,
            .breadcrumb {
                display: none;
            }
            body {
                background: white;
                color: black;
            }
            .main-content {
                box-shadow: none;
                margin: 0;
                padding: 0;
            }
        }