* {
            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;
            padding-top: 80px; 
        }
        a {
            text-decoration: none;
            color: #0056b3;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #003d82;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #0d3b66, #1a6fb3);
            color: white;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .my-logo:hover {
            color: #ffd166;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 25px;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            padding: 8px 12px;
            border-radius: 4px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .main-nav a:hover {
            background-color: rgba(255, 255, 255, 0.2);
            color: #ffd166;
        }
        .main-nav i {
            font-size: 1.1rem;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        #nav-toggle {
            display: none;
        }
        .breadcrumb {
            background: #e9ecef;
            padding: 10px 20px;
            font-size: 0.9rem;
            border-bottom: 1px solid #dee2e6;
        }
        .breadcrumb a {
            color: #6c757d;
        }
        .breadcrumb a:hover {
            color: #0056b3;
        }
        .breadcrumb span {
            color: #495057;
            margin: 0 5px;
        }
        main {
            padding: 30px 0;
            background: white;
            border-radius: 8px;
            margin: 20px auto;
            box-shadow: 0 2px 15px rgba(0,0,0,0.05);
        }
        .article-header {
            text-align: center;
            padding: 30px 20px;
            border-bottom: 3px solid #0d3b66;
            margin-bottom: 40px;
        }
        h1 {
            font-size: 2.8rem;
            color: #0d3b66;
            margin-bottom: 15px;
            line-height: 1.2;
        }
        .article-meta {
            color: #6c757d;
            font-size: 0.95rem;
            margin-bottom: 10px;
        }
        .article-meta i {
            margin-right: 5px;
        }
        .content-section {
            padding: 20px;
        }
        h2 {
            font-size: 2rem;
            color: #1a6fb3;
            margin: 40px 0 20px;
            padding-bottom: 10px;
            border-bottom: 2px dashed #adb5bd;
        }
        h3 {
            font-size: 1.6rem;
            color: #343a40;
            margin: 30px 0 15px;
        }
        h4 {
            font-size: 1.3rem;
            color: #495057;
            margin: 25px 0 12px;
        }
        p {
            margin-bottom: 20px;
            font-size: 1.1rem;
            line-height: 1.8;
            text-align: justify;
        }
        .highlight {
            background: #fff3cd;
            padding: 15px;
            border-left: 5px solid #ffc107;
            margin: 25px 0;
            border-radius: 0 8px 8px 0;
        }
        .highlight p {
            margin-bottom: 0;
            font-weight: 600;
            color: #856404;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 8px;
        }
        .featured-image {
            width: 80%;
            margin: 30px auto;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        }
        .featured-image figcaption {
            text-align: center;
            font-style: italic;
            color: #6c757d;
            padding: 10px;
            background: #f8f9fa;
        }
        .link-list {
            background: #f1f8ff;
            padding: 20px;
            border-radius: 8px;
            margin: 30px 0;
        }
        .link-list ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 15px;
        }
        .link-list li {
            padding: 10px;
            background: white;
            border-radius: 6px;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .link-list li:hover {
            transform: translateY(-5px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .link-list a {
            color: #0d3b66;
            font-weight: 600;
            display: block;
        }
        .link-list a:hover {
            color: #1a6fb3;
        }
        .functional-section {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin: 50px 0;
            padding: 30px;
            background: #f8f9fa;
            border-radius: 12px;
        }
        .function-box {
            background: white;
            padding: 25px;
            border-radius: 10px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.08);
            transition: transform 0.3s ease;
        }
        .function-box:hover {
            transform: scale(1.02);
        }
        .function-box h3 {
            color: #1a6fb3;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-top: 0;
        }
        .function-box form {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .function-box input, .function-box textarea, .function-box select {
            padding: 12px;
            border: 1px solid #ced4da;
            border-radius: 6px;
            font-size: 1rem;
            width: 100%;
        }
        .function-box button {
            background: #0d3b66;
            color: white;
            border: none;
            padding: 12px 20px;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s ease;
        }
        .function-box button:hover {
            background: #1a6fb3;
        }
        .star-rating {
            display: flex;
            gap: 10px;
            font-size: 1.8rem;
            color: #ffc107;
            cursor: pointer;
        }
        .star-rating i:hover {
            transform: scale(1.2);
        }
        .site-footer {
            background: #343a40;
            color: #adb5bd;
            padding: 40px 0 20px;
            margin-top: 50px;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
        }
        .footer-section h4 {
            color: #f8f9fa;
            margin-bottom: 20px;
            font-size: 1.3rem;
        }
        .friend-links {
            list-style: none;
        }
        .friend-links li {
            margin-bottom: 10px;
        }
        .friend-links a {
            color: #adb5bd;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .friend-links a:hover {
            color: #ffd166;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            margin-top: 30px;
            border-top: 1px solid #495057;
            font-size: 0.9rem;
            color: #6c757d;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.8rem; }
            .main-nav ul {
                gap: 15px;
            }
        }
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
            }
            .main-nav {
                width: 100%;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.5s ease;
            }
            #nav-toggle:checked ~ .main-nav {
                max-height: 500px;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
                padding-top: 20px;
            }
            .main-nav li {
                width: 100%;
            }
            .main-nav a {
                padding: 15px;
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
            .functional-section {
                grid-template-columns: 1fr;
            }
            .featured-image {
                width: 95%;
            }
        }
        @media (max-width: 576px) {
            body { padding-top: 120px; }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.6rem; }
            .article-header { padding: 20px 10px; }
            .content-section { padding: 15px; }
        }
        .text-center { text-align: center; }
        .mb-20 { margin-bottom: 20px; }
        .mt-30 { margin-top: 30px; }
        .bold { font-weight: 700; color: #0d3b66; }