* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            color: #333;
            line-height: 1.7;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: #2a7de1;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #ff6b6b;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(90deg, #1a2980, #26d0ce);
            color: white;
            padding: 1.5rem 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;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(to right, #ffd89b, #19547b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 0 2px 4px rgba(0,0,0,0.2);
            letter-spacing: -0.5px;
        }
        .my-logo a {
            background: none;
            -webkit-text-fill-color: initial;
            color: inherit;
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        nav a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            display: block;
        }
        nav a:hover, nav a.active {
            background-color: rgba(255,255,255,0.15);
            transform: translateY(-2px);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
            padding: 0.5rem;
        }
        .breadcrumb {
            background-color: #e9f2fa;
            padding: 1rem 0;
            font-size: 0.9rem;
            margin-bottom: 2rem;
        }
        .breadcrumb a {
            color: #555;
        }
        .breadcrumb a:hover {
            color: #1a2980;
        }
        .breadcrumb i {
            margin: 0 8px;
            color: #888;
        }
        main {
            flex: 1;
            padding: 2rem 0;
        }
        article {
            background: white;
            border-radius: 16px;
            padding: 2.5rem;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            margin-bottom: 2rem;
        }
        h1 {
            font-size: 2.8rem;
            color: #1a2980;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-left: 6px solid #ff6b6b;
            padding-left: 1rem;
        }
        h2 {
            font-size: 2rem;
            color: #26a69a;
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px dashed #c3cfe2;
        }
        h3 {
            font-size: 1.6rem;
            color: #2a7de1;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #ff8e53;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 500;
            color: #444;
            background-color: #f8f9fa;
            padding: 1.2rem;
            border-radius: 8px;
            border-left: 4px solid #26d0ce;
            margin-bottom: 2rem;
        }
        b, strong {
            color: #1a2980;
        }
        em {
            color: #ff6b6b;
            font-style: italic;
        }
        .highlight-box {
            background: linear-gradient(to right, #fffde4, #e2f2ff);
            border: 1px solid #a7d7ff;
            padding: 1.5rem;
            border-radius: 10px;
            margin: 2rem 0;
            box-shadow: inset 0 0 10px rgba(0,0,0,0.05);
        }
        .img-container {
            margin: 2.5rem auto;
            text-align: center;
            max-width: 800px;
        }
        .img-container img {
            border-radius: 12px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
            border: 3px solid white;
        }
        .caption {
            font-style: italic;
            color: #666;
            margin-top: 0.8rem;
            font-size: 0.95rem;
        }
        .interactive-section {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin: 3rem 0;
        }
        .feature-card {
            background: white;
            border-radius: 12px;
            padding: 1.8rem;
            box-shadow: 0 6px 15px rgba(0,0,0,0.07);
            transition: transform 0.4s ease, box-shadow 0.4s ease;
            border-top: 5px solid #2a7de1;
        }
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.12);
        }
        .feature-card h3 {
            color: #1a2980;
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .feature-card form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            margin-top: 1.2rem;
        }
        input, textarea, select {
            padding: 0.9rem;
            border: 1px solid #ccc;
            border-radius: 6px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #2a7de1;
            box-shadow: 0 0 0 3px rgba(42, 125, 225, 0.2);
        }
        button {
            background: linear-gradient(to right, #2a7de1, #26d0ce);
            color: white;
            border: none;
            padding: 1rem 1.5rem;
            border-radius: 6px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
        button:hover {
            background: linear-gradient(to right, #1a5fb4, #1ab9b7);
            transform: scale(1.03);
        }
        .stars {
            display: flex;
            gap: 5px;
            margin: 1rem 0;
            justify-content: center;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star:hover,
        .star.active {
            color: #ffc107;
        }
        footer {
            background: linear-gradient(90deg, #1a2980, #141e30);
            color: #e0e0e0;
            padding: 3rem 0 1.5rem;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 {
            color: #26d0ce;
            margin-bottom: 1.2rem;
            font-size: 1.4rem;
        }
        friend-link {
            display: block;
            margin: 0.8rem 0;
        }
        friend-link a {
            color: #a7d7ff;
            padding: 0.3rem 0;
            display: block;
            transition: padding-left 0.3s;
        }
        friend-link a:hover {
            color: white;
            padding-left: 8px;
            border-left: 3px solid #ff6b6b;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #2c3e50;
            font-size: 0.9rem;
            color: #aaa;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.8rem; }
            .header-container { flex-direction: column; gap: 1.5rem; }
            nav ul { flex-wrap: wrap; justify-content: center; }
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            nav ul {
                display: none;
                flex-direction: column;
                width: 100%;
                background-color: rgba(26, 41, 128, 0.98);
                position: absolute;
                top: 100%;
                left: 0;
                padding: 1rem;
                border-radius: 0 0 12px 12px;
                box-shadow: 0 10px 20px rgba(0,0,0,0.2);
            }
            nav ul.active { display: flex; }
            article { padding: 1.5rem; }
            .interactive-section { grid-template-columns: 1fr; }
        }
        @media (max-width: 480px) {
            h1 { font-size: 2rem; }
            .container { padding: 0 15px; }
            .feature-card { padding: 1.2rem; }
        }
        .text-center { text-align: center; }
        .mt-2 { margin-top: 2rem; }
        .mb-2 { margin-bottom: 2rem; }
        .emoji { font-size: 1.2em; margin-right: 5px; }
        .last-updated {
            background-color: #fff3cd;
            color: #856404;
            padding: 0.7rem;
            border-radius: 6px;
            font-size: 0.9rem;
            margin: 1.5rem 0;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }