* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            min-height: 100vh;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: #1e3c72;
            background: linear-gradient(to right, #2a5298, #1e3c72);
            color: white;
            padding: 15px 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;
        }
        .logo a.my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            text-decoration: none;
            color: #fff;
            text-transform: uppercase;
            letter-spacing: 2px;
            background: linear-gradient(90deg, #00b4db, #0083b0);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            transition: transform 0.3s;
        }
        .logo a.my-logo:hover {
            transform: scale(1.05);
        }
        .desktop-nav ul {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        .desktop-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 8px 15px;
            border-radius: 5px;
            transition: all 0.3s;
        }
        .desktop-nav a:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-2px);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            background: none;
            border: none;
            color: white;
        }
        .mobile-nav {
            display: none;
            background: #2a5298;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            padding: 20px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
        }
        .mobile-nav.active {
            display: block;
        }
        .mobile-nav ul {
            list-style: none;
        }
        .mobile-nav li {
            margin: 15px 0;
        }
        .mobile-nav a {
            color: white;
            text-decoration: none;
            font-size: 1.2rem;
            display: block;
            padding: 10px;
            border-left: 4px solid #00b4db;
            transition: padding-left 0.3s;
        }
        .mobile-nav a:hover {
            padding-left: 20px;
            background: rgba(255, 255, 255, 0.1);
        }
        .breadcrumb {
            background: #e9f5ff;
            padding: 12px 0;
            font-size: 0.95rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li {
            margin-right: 10px;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "›";
            margin-left: 10px;
            color: #0083b0;
        }
        .breadcrumb a {
            color: #1e3c72;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        main {
            padding: 40px 0;
            background: white;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            margin: 30px auto;
        }
        .article-content {
            padding: 0 30px;
        }
        h1 {
            font-size: 3.2rem;
            color: #1e3c72;
            margin-bottom: 25px;
            line-height: 1.2;
            text-align: center;
            border-bottom: 3px solid #00b4db;
            padding-bottom: 20px;
        }
        h2 {
            font-size: 2.4rem;
            color: #2a5298;
            margin: 50px 0 20px;
            padding-left: 15px;
            border-left: 6px solid #0083b0;
        }
        h3 {
            font-size: 1.8rem;
            color: #006994;
            margin: 35px 0 15px;
        }
        h4 {
            font-size: 1.4rem;
            color: #005073;
            margin: 25px 0 10px;
        }
        p {
            margin-bottom: 22px;
            text-align: justify;
            font-size: 1.1rem;
        }
        .highlight {
            background: linear-gradient(120deg, #a1c4fd 0%, #c2e9fb 100%);
            padding: 3px 8px;
            border-radius: 4px;
            font-weight: 700;
        }
        .emoji {
            font-size: 1.3em;
            margin: 0 5px;
        }
        .article-img {
            width: 100%;
            max-width: 900px;
            height: auto;
            border-radius: 12px;
            margin: 30px auto;
            display: block;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
            transition: transform 0.5s;
        }
        .article-img:hover {
            transform: scale(1.01);
        }
        .last-updated {
            text-align: center;
            font-style: italic;
            color: #666;
            margin: 20px 0 40px;
            font-size: 1rem;
        }
        .content-section {
            margin-bottom: 50px;
        }
        .link-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 20px;
            margin: 30px 0;
        }
        .link-card {
            background: #f1f8ff;
            padding: 20px;
            border-radius: 10px;
            border: 2px solid #c2e9fb;
            transition: all 0.3s;
        }
        .link-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 131, 176, 0.2);
        }
        .link-card a {
            color: #1e3c72;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
        }
        .link-card a:hover {
            text-decoration: underline;
            color: #00b4db;
        }
        .link-card p {
            font-size: 1rem;
            margin-top: 10px;
            color: #555;
        }
        .form-container {
            background: #f9fdff;
            border: 2px dashed #00b4db;
            border-radius: 12px;
            padding: 30px;
            margin: 40px 0;
        }
        .form-title {
            font-size: 1.8rem;
            color: #1e3c72;
            margin-bottom: 25px;
            display: flex;
            align-items: center;
            gap: 15px;
        }
        .form-title i {
            color: #00b4db;
        }
        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 25px;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: #2a5298;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 14px;
            border: 2px solid #c2e9fb;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: #00b4db;
            box-shadow: 0 0 8px rgba(0, 180, 219, 0.4);
        }
        .btn {
            background: linear-gradient(to right, #00b4db, #0083b0);
            color: white;
            padding: 15px 30px;
            border: none;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 7px 15px rgba(0, 131, 176, 0.4);
        }
        footer {
            background: #1e3c72;
            color: white;
            padding: 50px 0 20px;
            margin-top: 60px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-section h3 {
            color: #00b4db;
            font-size: 1.5rem;
            margin-bottom: 20px;
            border-bottom: 2px solid #0083b0;
            padding-bottom: 10px;
        }
        friend-link {
            display: block;
            margin: 15px 0;
        }
        friend-link a {
            color: #c2e9fb;
            text-decoration: none;
            font-size: 1.1rem;
            transition: color 0.3s;
        }
        friend-link a:hover {
            color: white;
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #2a5298;
            font-size: 0.95rem;
            color: #a1c4fd;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.8rem; }
            h2 { font-size: 2.1rem; }
            .form-grid { grid-template-columns: 1fr; }
        }
        @media (max-width: 768px) {
            .desktop-nav { display: none; }
            .hamburger { display: block; }
            h1 { font-size: 2.3rem; }
            h2 { font-size: 1.9rem; }
            h3 { font-size: 1.6rem; }
            .article-content { padding: 0 20px; }
            .link-list { grid-template-columns: 1fr; }
        }
        @media (max-width: 480px) {
            h1 { font-size: 2rem; }
            .logo a.my-logo { font-size: 1.8rem; }
            .btn { width: 100%; justify-content: center; }
        }