* {
            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-color: #f8f9fa;
            max-width: 100vw;
            overflow-x: hidden;
        }
        h1, h2, h3, h4 {
            font-family: 'Arial Black', Gadget, sans-serif;
            color: #2c3e50;
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        h1 {
            font-size: 2.8rem;
            color: #e74c3c;
            text-shadow: 2px 2px 0 #f1c40f;
            border-bottom: 5px solid #3498db;
            padding-bottom: 15px;
            margin-top: 1.5rem;
        }
        h2 {
            font-size: 2.2rem;
            color: #2980b9;
            border-left: 6px solid #e74c3c;
            padding-left: 15px;
            margin-top: 2.5rem;
        }
        h3 {
            font-size: 1.8rem;
            color: #16a085;
            margin-top: 2rem;
        }
        h4 {
            font-size: 1.4rem;
            color: #8e44ad;
            margin-top: 1.5rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #1a2980 0%, #26d0ce 100%);
            padding: 1rem 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;
            flex-wrap: wrap;
        }
        .my-logo {
            font-family: 'Courier New', monospace;
            font-size: 2.5rem;
            font-weight: 900;
            color: #f1c40f;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
            text-shadow: 3px 3px 0 #e74c3c;
            transition: transform 0.3s;
        }
        .my-logo:hover {
            transform: scale(1.05);
        }
        .my-logo i {
            color: #2ecc71;
        }
        .main-nav {
            display: flex;
            gap: 1.5rem;
        }
        .nav-link {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 8px 15px;
            border-radius: 5px;
            transition: all 0.3s;
            background: rgba(255,255,255,0.1);
        }
        .nav-link:hover {
            background: #f1c40f;
            color: #2c3e50;
            transform: translateY(-3px);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 4px;
            padding: 10px;
        }
        .hamburger span {
            width: 25px;
            height: 3px;
            background: white;
            border-radius: 2px;
            transition: 0.3s;
        }
        .breadcrumb {
            background: #ecf0f1;
            padding: 12px 20px;
            border-radius: 5px;
            margin: 1.5rem 0;
            font-size: 0.95rem;
        }
        .breadcrumb a {
            color: #3498db;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .content-area {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            margin: 2rem 0;
        }
        .main-content {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .sidebar {
            background: white;
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .feature-box {
            background: linear-gradient(to right, #ffeaa7, #fab1a0);
            padding: 1.5rem;
            border-radius: 10px;
            margin: 2rem 0;
            border-left: 8px solid #e74c3c;
        }
        .code-block {
            background: #2d3436;
            color: #dfe6e9;
            padding: 1.5rem;
            border-radius: 8px;
            font-family: 'Courier New', monospace;
            margin: 1.5rem 0;
            overflow-x: auto;
            border: 2px dashed #f1c40f;
        }
        .tip {
            background: #d1ecf1;
            border-left: 6px solid #17a2b8;
            padding: 1.2rem;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        .form-control {
            width: 100%;
            padding: 12px;
            border: 2px solid #bdc3c7;
            border-radius: 6px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-control:focus {
            border-color: #3498db;
            outline: none;
            box-shadow: 0 0 0 3px rgba(52,152,219,0.2);
        }
        .btn {
            background: linear-gradient(to right, #3498db, #2ecc71);
            color: white;
            border: none;
            padding: 12px 24px;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
            transition: all 0.3s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(0,0,0,0.1);
        }
        .rating {
            display: flex;
            gap: 5px;
            margin: 1rem 0;
        }
        .star {
            color: #f1c40f;
            cursor: pointer;
            font-size: 1.5rem;
            transition: transform 0.2s;
        }
        .star:hover {
            transform: scale(1.2);
        }
        .article-image {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: 10px;
            margin: 2rem auto;
            display: block;
            box-shadow: 0 10px 20px rgba(0,0,0,0.15);
            border: 5px solid white;
            transition: transform 0.5s;
        }
        .article-image:hover {
            transform: scale(1.02);
        }
        .site-footer {
            background: #2c3e50;
            color: #ecf0f1;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        friend-link {
            display: block;
            background: #34495e;
            padding: 1rem;
            margin: 0.5rem 0;
            border-radius: 5px;
            transition: all 0.3s;
        }
        friend-link a {
            color: #1abc9c;
            text-decoration: none;
            font-weight: 600;
        }
        friend-link:hover {
            background: #3d566e;
            transform: translateX(5px);
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #4a6572;
            font-size: 0.9rem;
            color: #bdc3c7;
        }
        .text-center { text-align: center; }
        .text-bold { font-weight: 700; }
        .text-highlight { background: #f1c40f; padding: 2px 6px; border-radius: 3px; }
        .emoji { font-size: 1.2em; }
        @media (max-width: 992px) {
            .content-area {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
            h1 { font-size: 2.4rem; }
            h2 { font-size: 2rem; }
        }
        @media (max-width: 768px) {
            .main-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                margin-top: 1rem;
            }
            .main-nav.active {
                display: flex;
            }
            .hamburger {
                display: flex;
            }
            .hamburger.active span:nth-child(1) {
                transform: rotate(45deg) translate(6px, 6px);
            }
            .hamburger.active span:nth-child(2) {
                opacity: 0;
            }
            .hamburger.active span:nth-child(3) {
                transform: rotate(-45deg) translate(6px, -6px);
            }
            .header-container {
                flex-wrap: wrap;
            }
            .my-logo {
                font-size: 2rem;
            }
        }
        @media (max-width: 576px) {
            .main-content, .sidebar {
                padding: 1.5rem;
            }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.7rem; }
            h3 { font-size: 1.5rem; }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .fade-in {
            animation: fadeIn 0.8s ease-out;
        }