* {
            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: 0;
            margin: 0;
        }
        a {
            color: #0066cc;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #ff6b00;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
            color: #fff;
            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;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            color: #ff6b00;
            text-transform: uppercase;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: #00a8ff;
        }
        .my-logo:hover {
            color: #00a8ff;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 4px;
        }
        .hamburger span {
            width: 25px;
            height: 3px;
            background-color: #fff;
            border-radius: 2px;
            transition: 0.3s;
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(7px, -6px);
        }
        nav {
            display: flex;
            align-items: center;
            gap: 30px;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 25px;
        }
        .nav-links a {
            color: #fff;
            font-weight: 600;
            padding: 8px 12px;
            border-radius: 4px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-links a:hover {
            background-color: rgba(255, 107, 0, 0.2);
            color: #ff6b00;
            text-decoration: none;
        }
        .breadcrumb {
            background-color: #e9ecef;
            padding: 12px 20px;
            margin-bottom: 30px;
            border-radius: 5px;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: #555;
        }
        .breadcrumb a:hover {
            color: #ff6b00;
        }
        .breadcrumb span {
            color: #777;
            margin: 0 5px;
        }
        main {
            padding: 30px 0;
            background-color: #fff;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin-bottom: 40px;
        }
        .article-content {
            padding: 0 30px;
        }
        h1 {
            font-size: 3rem;
            color: #1a1a2e;
            margin-bottom: 20px;
            line-height: 1.2;
            border-bottom: 4px solid #ff6b00;
            padding-bottom: 15px;
        }
        h2 {
            font-size: 2.2rem;
            color: #16213e;
            margin: 40px 0 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #00a8ff;
        }
        h3 {
            font-size: 1.8rem;
            color: #0066cc;
            margin: 30px 0 15px;
        }
        h4 {
            font-size: 1.4rem;
            color: #555;
            margin: 20px 0 10px;
        }
        p {
            margin-bottom: 20px;
            font-size: 1.1rem;
            text-align: justify;
            line-height: 1.8;
        }
        .highlight {
            background-color: #fff9e6;
            border-left: 5px solid #ffcc00;
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 8px 8px 0;
        }
        .bold {
            font-weight: 800;
            color: #1a1a2e;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .feature-img {
            width: 100%;
            max-width: 900px;
            margin: 30px auto;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        }
        .feature-img img {
            width: 100%;
            height: auto;
            transition: transform 0.5s ease;
        }
        .feature-img img:hover {
            transform: scale(1.03);
        }
        .form-section {
            background-color: #f1f8ff;
            padding: 25px;
            border-radius: 10px;
            margin: 40px 0;
            border: 1px solid #cce7ff;
        }
        .form-section h3 {
            color: #16213e;
            margin-top: 0;
        }
        .form-group {
            margin-bottom: 20px;
        }
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: #333;
        }
        input, textarea, select {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ccc;
            border-radius: 6px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            border-color: #0066cc;
            outline: none;
            box-shadow: 0 0 5px rgba(0,102,204,0.3);
        }
        button {
            background: linear-gradient(to right, #0066cc, #00a8ff);
            color: white;
            border: none;
            padding: 14px 25px;
            border-radius: 6px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s, transform 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        button:hover {
            background: linear-gradient(to right, #0052a3, #0097e6);
            transform: translateY(-3px);
            box-shadow: 0 5px 10px rgba(0,0,0,0.1);
        }
        footer {
            background-color: #1a1a2e;
            color: #fff;
            padding: 40px 0 20px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 30px;
        }
        .footer-section h4 {
            color: #ff6b00;
            margin-bottom: 20px;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #ccc;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-links a:hover {
            color: #ff6b00;
        }
        friend-link {
            display: block;
            margin: 20px 0;
            padding: 15px;
            background-color: rgba(255,255,255,0.1);
            border-radius: 8px;
        }
        friend-link a {
            color: #00a8ff;
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #333;
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.5rem; }
            h2 { font-size: 2rem; }
            h3 { font-size: 1.6rem; }
            .nav-links { gap: 15px; }
        }
        @media (max-width: 768px) {
            .header-content {
                flex-direction: column;
                align-items: flex-start;
            }
            .hamburger {
                display: flex;
                position: absolute;
                top: 20px;
                right: 20px;
            }
            nav {
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
                display: none;
                margin-top: 20px;
            }
            nav.active {
                display: flex;
            }
            .nav-links {
                flex-direction: column;
                width: 100%;
                gap: 10px;
            }
            .nav-links a {
                padding: 12px 15px;
                width: 100%;
            }
            .article-content {
                padding: 0 20px;
            }
            .footer-content {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            h1 { font-size: 2rem; }
            h2 { font-size: 1.7rem; }
            .breadcrumb { font-size: 0.8rem; }
            .form-section { padding: 15px; }
        }