* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(to right, #1a1a2e, #16213e);
            color: white;
            padding: 1rem 0;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            text-decoration: none;
            color: #00eeff;
            text-transform: uppercase;
            letter-spacing: 1px;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo:hover {
            color: #ffffff;
            text-shadow: 0 0 10px #00eeff;
        }
        .my-logo i { font-size: 2rem; }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 5px;
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        nav a {
            color: #e6e6e6;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: all 0.3s ease;
        }
        nav a:hover,
        nav a.active {
            background-color: #00eeff;
            color: #16213e;
        }
        .breadcrumb {
            padding: 1rem 0;
            font-size: 0.9rem;
            color: #aaa;
        }
        .breadcrumb a {
            color: #00eeff;
            text-decoration: none;
        }
        .breadcrumb span { color: #ccc; }
        main {
            flex: 1;
            padding: 2rem 0;
        }
        article {
            background: white;
            border-radius: 16px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            padding: 2.5rem;
            margin-bottom: 2rem;
        }
        h1 {
            font-size: 2.8rem;
            color: #16213e;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 4px solid #00eeff;
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 2rem;
            color: #1a1a2e;
            margin: 2.5rem 0 1rem;
            padding-left: 10px;
            border-left: 5px solid #00eeff;
        }
        h3 {
            font-size: 1.5rem;
            color: #0f3460;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.2rem;
            color: #555;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 600;
            color: #0f3460;
            background: #f0f8ff;
            padding: 1rem;
            border-radius: 8px;
            border-left: 4px solid #0f3460;
        }
        .highlight {
            background: linear-gradient(120deg, #a1c4fd 0%, #c2e9fb 100%);
            padding: 1.5rem;
            border-radius: 10px;
            margin: 1.5rem 0;
            border-left: 6px solid #1a73e8;
        }
        img.responsive {
            max-width: 100%;
            height: auto;
            border-radius: 12px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
            display: block;
            margin: 2rem auto;
            transition: transform 0.5s ease;
        }
        img.responsive:hover {
            transform: scale(1.02);
        }
        .content-link {
            color: #1a73e8;
            text-decoration: none;
            font-weight: 600;
            border-bottom: 2px dotted #1a73e8;
            transition: all 0.2s;
        }
        .content-link:hover {
            color: #0d47a1;
            border-bottom-style: solid;
            background-color: #e3f2fd;
        }
        .link-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1rem;
            margin: 2rem 0;
        }
        .link-card {
            background: #f8f9fa;
            border: 1px solid #dee2e6;
            border-radius: 10px;
            padding: 1rem;
            transition: all 0.3s ease;
        }
        .link-card:hover {
            background: #e9ecef;
            transform: translateY(-5px);
            box-shadow: 0 10px 15px rgba(0,0,0,0.1);
        }
        .link-card a {
            color: #1a1a2e;
            text-decoration: none;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .link-card i { color: #00eeff; }
        .form-section {
            background: #f8f9fa;
            border-radius: 12px;
            padding: 2rem;
            margin: 3rem 0;
            border-top: 6px solid #16213e;
        }
        .form-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin-top: 1.5rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        label {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: #1a1a2e;
        }
        input, textarea, select {
            padding: 0.8rem;
            border: 2px solid #c3cfe2;
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #00eeff;
            box-shadow: 0 0 0 3px rgba(0, 238, 255, 0.2);
        }
        button {
            background: linear-gradient(to right, #16213e, #0f3460);
            color: white;
            border: none;
            padding: 0.9rem 2rem;
            border-radius: 8px;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }
        button:hover {
            background: linear-gradient(to right, #0f3460, #1a1a2e);
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(0, 0, 0, 0.2);
        }
        .rating {
            display: flex;
            gap: 5px;
            margin: 1rem 0;
        }
        .rating input { display: none; }
        .rating label {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .rating input:checked ~ label,
        .rating label:hover,
        .rating label:hover ~ label { color: #ffc107; }
        footer {
            background: #1a1a2e;
            color: #e6e6e6;
            padding: 3rem 0 1.5rem;
            margin-top: auto;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 {
            color: #00eeff;
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li { margin-bottom: 0.8rem; }
        .footer-links a {
            color: #ccc;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer-links a:hover {
            color: #00eeff;
            padding-left: 5px;
        }
        friend-link {
            display: inline-block;
            background: #0f3460;
            color: white;
            padding: 0.5rem 1rem;
            border-radius: 20px;
            text-decoration: none;
            margin: 0.3rem;
            transition: all 0.3s;
        }
        friend-link:hover {
            background: #00eeff;
            color: #1a1a2e;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #333;
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: #16213e;
                padding: 1rem;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
            }
            nav ul.active { display: flex; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            article { padding: 1.5rem; }
            .link-list { grid-template-columns: 1fr; }
            .form-grid { grid-template-columns: 1fr; }
        }
        .last-updated {
            text-align: right;
            font-style: italic;
            color: #666;
            font-size: 0.9rem;
            margin-top: 2rem;
            padding-top: 1rem;
            border-top: 1px dashed #ccc;
        }