* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        body {
            background-color: #0f1419;
            color: #e0e0e0;
            line-height: 1.7;
            overflow-x: hidden;
        }
        a {
            color: #ff6b35;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #ff9e6d;
            text-decoration: underline;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #1a1f2e, #0a0e17);
            padding: 20px 0;
            border-bottom: 3px solid #ff6b35;
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2.5rem;
            font-weight: 900;
            color: #ff6b35;
            text-transform: uppercase;
            letter-spacing: 2px;
            text-shadow: 2px 2px 5px rgba(0,0,0,0.7);
        }
        .my-logo:hover {
            color: #ff9e6d;
            text-decoration: none;
        }
        .nav-menu {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        .nav-menu a {
            font-size: 1.1rem;
            font-weight: 600;
            padding: 10px 15px;
            border-radius: 5px;
        }
        .nav-menu a:hover {
            background-color: rgba(255, 107, 53, 0.2);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: #ff6b35;
        }
        .breadcrumb {
            background-color: #1a1f2e;
            padding: 15px 0;
            margin-bottom: 30px;
        }
        .breadcrumb ul {
            display: flex;
            list-style: none;
            gap: 10px;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '>';
            margin-left: 10px;
            color: #888;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            margin: 30px 0;
        }
        .article-content {
            background-color: #1a1f2e;
            border-radius: 15px;
            padding: 40px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.5);
        }
        .sidebar {
            background-color: #1a1f2e;
            border-radius: 15px;
            padding: 25px;
            align-self: start;
        }
        h1 {
            font-size: 3.2rem;
            color: #ff6b35;
            margin-bottom: 25px;
            text-align: center;
            border-bottom: 3px solid #ff6b35;
            padding-bottom: 20px;
        }
        h2 {
            font-size: 2.4rem;
            color: #ff9e6d;
            margin-top: 40px;
            margin-bottom: 20px;
            border-left: 5px solid #ff6b35;
            padding-left: 15px;
        }
        h3 {
            font-size: 1.9rem;
            color: #e0e0e0;
            margin-top: 30px;
            margin-bottom: 15px;
        }
        h4 {
            font-size: 1.5rem;
            color: #b0b0b0;
            margin-top: 25px;
            margin-bottom: 12px;
        }
        p {
            margin-bottom: 25px;
            font-size: 1.15rem;
            text-align: justify;
        }
        .highlight {
            background-color: rgba(255, 107, 53, 0.1);
            border-left: 5px solid #ff6b35;
            padding: 20px;
            margin: 25px 0;
            font-style: italic;
            font-size: 1.2rem;
        }
        .img-container {
            text-align: center;
            margin: 35px 0;
        }
        .img-container img {
            max-width: 100%;
            height: auto;
            border-radius: 10px;
            border: 3px solid #ff6b35;
            box-shadow: 0 8px 20px rgba(0,0,0,0.6);
        }
        .function-form {
            background-color: #252c3e;
            padding: 25px;
            border-radius: 10px;
            margin: 30px 0;
        }
        .function-form h3 {
            color: #ff6b35;
            margin-top: 0;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px;
            border-radius: 8px;
            border: 2px solid #444;
            background-color: #1a1f2e;
            color: #e0e0e0;
            font-size: 1rem;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: #ff6b35;
        }
        button {
            background-color: #ff6b35;
            color: white;
            border: none;
            padding: 14px 28px;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: bold;
            cursor: pointer;
            transition: background-color 0.3s ease;
        }
        button:hover {
            background-color: #ff8a5c;
        }
        .site-footer {
            background: linear-gradient(135deg, #1a1f2e, #0a0e17);
            padding: 50px 0 30px;
            border-top: 3px solid #ff6b35;
            margin-top: 50px;
        }
        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 40px;
        }
        .footer-section {
            flex: 1;
            min-width: 250px;
        }
        .footer-section h3 {
            color: #ff6b35;
            margin-bottom: 25px;
            font-size: 1.8rem;
        }
        friend-link {
            display: block;
            margin-bottom: 12px;
            font-size: 1.1rem;
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #444;
            margin-top: 30px;
            color: #888;
            font-size: 0.95rem;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
            .nav-menu {
                gap: 20px;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                width: 100%;
                background-color: #1a1f2e;
                position: absolute;
                top: 100%;
                left: 0;
                padding: 20px;
                border-top: 2px solid #ff6b35;
            }
            .nav-menu.active {
                display: flex;
            }
            .nav-menu li {
                margin: 10px 0;
            }
            h1 {
                font-size: 2.5rem;
            }
            h2 {
                font-size: 2rem;
            }
            .article-content {
                padding: 25px;
            }
        }
        .text-bold {
            font-weight: bold;
            color: #ff9e6d;
        }
        .last-updated {
            text-align: right;
            font-size: 0.95rem;
            color: #aaa;
            margin-bottom: 20px;
        }