* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
        }
        a {
            text-decoration: none;
            color: #0066cc;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #004499;
        }
        img {
            max-width: 100%;
            height: auto;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        header {
            background: linear-gradient(135deg, #1a237e, #283593);
            color: white;
            padding: 15px 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: white;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }
        .my-logo:hover {
            color: #ffcc00;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        nav {
            flex-grow: 1;
        }
        .nav-links {
            display: flex;
            justify-content: flex-end;
            list-style: none;
            gap: 25px;
        }
        .nav-links a {
            color: white;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 8px 12px;
            border-radius: 4px;
        }
        .nav-links a:hover {
            background-color: rgba(255,255,255,0.2);
        }
        .breadcrumb {
            padding: 10px 0;
            font-size: 0.95rem;
            color: #ccc;
        }
        .breadcrumb a {
            color: #ffcc00;
        }
        main {
            background: white;
            padding: 30px;
            margin: 20px auto;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        h1 {
            font-size: 2.8rem;
            color: #1a237e;
            margin-bottom: 20px;
            text-align: center;
            border-bottom: 3px solid #ffcc00;
            padding-bottom: 15px;
        }
        h2 {
            font-size: 2rem;
            color: #283593;
            margin: 30px 0 15px;
            padding-left: 10px;
            border-left: 5px solid #ffcc00;
        }
        h3 {
            font-size: 1.6rem;
            color: #3949ab;
            margin: 25px 0 12px;
        }
        h4 {
            font-size: 1.3rem;
            color: #5c6bc0;
            margin: 20px 0 10px;
        }
        p {
            margin-bottom: 18px;
            text-align: justify;
            line-height: 1.8;
            font-size: 1.1rem;
        }
        .highlight {
            background-color: #fff9c4;
            padding: 15px;
            border-left: 4px solid #ffcc00;
            margin: 20px 0;
            font-weight: bold;
        }
        .article-img {
            float: right;
            margin: 15px 0 15px 25px;
            border-radius: 8px;
            box-shadow: 0 6px 12px rgba(0,0,0,0.15);
            max-width: 400px;
        }
        .functional-section {
            background: #f1f8ff;
            padding: 25px;
            border-radius: 8px;
            margin: 30px 0;
            border: 1px solid #c5d9f1;
        }
        .functional-section h3 {
            color: #1a237e;
        }
        form {
            display: flex;
            flex-direction: column;
            gap: 15px;
            max-width: 600px;
        }
        input, textarea, select {
            padding: 12px;
            border: 1px solid #bbb;
            border-radius: 6px;
            font-size: 1rem;
            width: 100%;
        }
        button {
            padding: 14px 25px;
            background: #1a237e;
            color: white;
            border: none;
            border-radius: 6px;
            font-size: 1.1rem;
            cursor: pointer;
            transition: background 0.3s ease;
        }
        button:hover {
            background: #283593;
        }
        .content-links {
            list-style: none;
            padding: 20px;
            background: #e8f4fd;
            border-radius: 8px;
            margin: 25px 0;
        }
        .content-links li {
            margin: 10px 0;
        }
        footer {
            background: #1a237e;
            color: white;
            padding: 40px 0 20px;
            margin-top: 40px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
        }
        .footer-section h3 {
            color: #ffcc00;
            font-size: 1.5rem;
            margin-bottom: 20px;
        }
        .friend-links {
            list-style: none;
        }
        .friend-links a {
            color: #b3c6ff;
            display: block;
            padding: 8px 0;
            border-bottom: 1px dashed #3949ab;
        }
        .friend-links a:hover {
            color: white;
        }
        .copyright {
            text-align: center;
            padding-top: 25px;
            border-top: 1px solid #3949ab;
            margin-top: 30px;
            font-size: 0.95rem;
            color: #ccc;
        }
        @media (max-width: 768px) {
            .header-top {
                flex-direction: column;
                align-items: flex-start;
            }
            .hamburger {
                display: block;
                position: absolute;
                top: 20px;
                right: 20px;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #283593;
                padding: 15px;
                margin-top: 15px;
                border-radius: 8px;
            }
            .nav-links.active {
                display: flex;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .article-img {
                float: none;
                margin: 15px auto;
                display: block;
                max-width: 100%;
            }
            .functional-section {
                padding: 20px;
            }
        }
        .clearfix::after {
            content: "";
            clear: both;
            display: table;
        }
        .last-updated {
            font-style: italic;
            color: #666;
            text-align: right;
            margin-bottom: 20px;
        }
        .emoji {
            font-size: 1.2rem;
            margin: 0 5px;
        }