* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: #333;
            background-color: #f8f9fa;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        a {
            color: #2c5aa0;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #1a365d;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 8px;
        }
        .site-header {
            background: linear-gradient(135deg, #1e3a8a 0%, #2c5aa0 100%);
            color: white;
            padding: 1rem 0;
            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;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2.5rem;
            font-weight: 800;
            color: white;
            text-transform: uppercase;
            letter-spacing: 1px;
            font-family: 'Georgia', serif;
        }
        .my-logo:hover {
            text-decoration: none;
            opacity: 0.9;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
        }
        .main-nav a:hover {
            background-color: rgba(255, 255, 255, 0.15);
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #e9ecef;
            margin: 0 -15px;
            padding-left: 15px;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li:not(:last-child)::after {
            content: ">";
            margin: 0 10px;
            color: #666;
        }
        .breadcrumb a {
            color: #555;
        }
        main {
            padding: 2rem 0;
            background: white;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin-top: 1rem;
        }
        article {
            padding: 0 2rem;
        }
        @media (max-width: 768px) {
            article {
                padding: 0 1rem;
            }
        }
        h1 {
            font-size: 3.2rem;
            color: #1e3a8a;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid #2c5aa0;
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 2.4rem;
            color: #2c5aa0;
            margin: 2.5rem 0 1rem;
            padding-top: 1rem;
            border-top: 1px solid #eaeaea;
        }
        h3 {
            font-size: 1.8rem;
            color: #3b82f6;
            margin: 1.8rem 0 0.8rem;
        }
        h4 {
            font-size: 1.4rem;
            color: #555;
            margin: 1.5rem 0 0.6rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 500;
            color: #444;
            background-color: #f1f8ff;
            padding: 1.5rem;
            border-left: 5px solid #2c5aa0;
            border-radius: 0 8px 8px 0;
            margin-bottom: 2rem;
        }
        strong {
            color: #1e3a8a;
        }
        .highlight-box {
            background: linear-gradient(to right, #e0f7fa, #bbdefb);
            border-left: 6px solid #0288d1;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .article-img {
            margin: 2rem auto;
            max-width: 900px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
        }
        .article-img figcaption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .last-updated {
            text-align: right;
            font-size: 0.9rem;
            color: #777;
            margin-bottom: 2rem;
            padding-bottom: 1rem;
            border-bottom: 1px dashed #ccc;
        }
        .functional-section {
            background-color: #f8f9fa;
            padding: 2rem;
            border-radius: 12px;
            margin: 3rem 0;
            border: 1px solid #dee2e6;
        }
        .functional-section h2 {
            border-top: none;
            padding-top: 0;
            margin-top: 0;
            color: #1e3a8a;
        }
        .form-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-top: 1.5rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        .form-group label {
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #444;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            padding: 0.8rem;
            border: 1px solid #ccc;
            border-radius: 6px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: #2c5aa0;
            box-shadow: 0 0 0 3px rgba(44, 90, 160, 0.2);
        }
        .btn {
            background: linear-gradient(to bottom, #2c5aa0, #1e3a8a);
            color: white;
            border: none;
            padding: 0.9rem 1.8rem;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            align-self: start;
            margin-top: 1rem;
        }
        .btn:hover {
            background: linear-gradient(to bottom, #1e3a8a, #15325c);
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(0,0,0,0.15);
            text-decoration: none;
        }
        .related-links {
            background-color: #eef7ff;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
        }
        .related-links h3 {
            margin-top: 0;
            color: #2c5aa0;
        }
        .related-links ul {
            list-style-type: square;
            padding-left: 1.5rem;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 0.8rem;
        }
        .related-links li {
            margin-bottom: 0.5rem;
        }
        footer {
            background-color: #1e3a8a;
            color: white;
            padding: 2rem 0;
            margin-top: 3rem;
            border-radius: 12px 12px 0 0;
        }
        .footer-container {
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        friend-link {
            display: block;
            width: 100%;
            text-align: center;
            padding: 1.5rem;
            background-color: rgba(255,255,255,0.05);
            border-radius: 8px;
            margin-bottom: 1.5rem;
        }
        friend-link a {
            color: #a3d0ff;
            font-size: 1.1rem;
            margin: 0 1rem;
        }
        friend-link a:hover {
            color: white;
            text-decoration: underline;
        }
        .copyright {
            font-size: 0.9rem;
            color: #cbd5e0;
            text-align: center;
            padding-top: 1rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            width: 100%;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.8rem; }
            h2 { font-size: 2.1rem; }
            .form-grid { grid-template-columns: 1fr; }
        }
        @media (max-width: 768px) {
            .header-container {
                flex-direction: column;
                align-items: stretch;
            }
            .my-logo {
                align-self: flex-start;
                font-size: 2rem;
                margin-bottom: 1rem;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
                display: none;
                width: 100%;
            }
            .main-nav.active ul {
                display: flex;
            }
            .main-nav li {
                width: 100%;
            }
            .main-nav a {
                display: block;
                padding: 1rem;
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
            .hamburger {
                display: block;
                position: absolute;
                top: 1.5rem;
                right: 15px;
            }
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.9rem; }
            article { padding: 0 1rem; }
            .functional-section { padding: 1.5rem; }
        }
        @media (max-width: 576px) {
            body { padding: 0 10px; }
            h1 { font-size: 2rem; }
            .lead { font-size: 1.1rem; padding: 1rem; }
            .breadcrumb li { font-size: 0.9rem; }
        }