:root {
            --primary-color: #FF6B6B;
            --secondary-color: #4ECDC4;
            --accent-color: #FFD166;
            --dark-color: #2D3047;
            --light-color: #F7FFF7;
            --font-main: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: var(--font-main);
            line-height: 1.8;
            color: #333;
            background-color: var(--light-color);
            padding-top: 80px; 
        }
        a {
            text-decoration: none;
            color: var(--primary-color);
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary-color);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: var(--dark-color);
            color: white;
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: bold;
            color: var(--accent-color);
            text-transform: uppercase;
            letter-spacing: 2px;
        }
        .my-logo:hover {
            transform: scale(1.05);
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 25px;
        }
        nav ul li a {
            color: white;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 5px;
        }
        nav ul li a:hover {
            background-color: var(--primary-color);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: white;
        }
        .breadcrumb {
            background-color: #f1f1f1;
            padding: 10px 20px;
            font-size: 0.9rem;
            border-bottom: 1px solid #ddd;
        }
        .breadcrumb a {
            color: #555;
        }
        .breadcrumb a:hover {
            color: var(--primary-color);
        }
        main {
            padding: 30px 0;
            background-color: white;
            border-radius: 10px;
            box-shadow: var(--shadow);
            margin: 20px auto;
        }
        .article-content {
            padding: 0 30px;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--dark-color);
            margin-bottom: 20px;
            line-height: 1.3;
            text-align: center;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary-color);
            margin: 40px 0 20px;
            padding-bottom: 10px;
            border-bottom: 3px solid var(--secondary-color);
        }
        h3 {
            font-size: 1.6rem;
            color: var(--secondary-color);
            margin: 30px 0 15px;
        }
        h4 {
            font-size: 1.3rem;
            color: var(--accent-color);
            margin: 20px 0 10px;
        }
        p {
            margin-bottom: 20px;
            font-size: 1.1rem;
            text-align: justify;
        }
        .highlight {
            background-color: #FFF9C4;
            padding: 15px;
            border-left: 5px solid var(--accent-color);
            margin: 20px 0;
            border-radius: 0 5px 5px 0;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            margin: 25px auto;
            border-radius: 10px;
            box-shadow: var(--shadow);
        }
        .link-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 15px;
            margin: 30px 0;
        }
        .link-list a {
            display: block;
            padding: 12px;
            background-color: #f0f8ff;
            border-radius: 8px;
            text-align: center;
            font-weight: bold;
        }
        .link-list a:hover {
            background-color: var(--secondary-color);
            color: white;
        }
        .form-section {
            background-color: #f9f9f9;
            padding: 25px;
            border-radius: 10px;
            margin: 40px 0;
        }
        form {
            display: flex;
            flex-direction: column;
            gap: 15px;
            max-width: 600px;
            margin: 0 auto;
        }
        input, textarea, select {
            padding: 12px;
            border: 2px solid #ddd;
            border-radius: 5px;
            font-size: 1rem;
            width: 100%;
        }
        input:focus, textarea:focus, select:focus {
            border-color: var(--primary-color);
            outline: none;
        }
        button {
            padding: 14px;
            background-color: var(--primary-color);
            color: white;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            font-size: 1.1rem;
            font-weight: bold;
            transition: var(--transition);
        }
        button:hover {
            background-color: var(--secondary-color);
            transform: translateY(-3px);
        }
        .rating {
            display: flex;
            gap: 10px;
            align-items: center;
            margin: 20px 0;
        }
        .rating i {
            color: #FFD700;
            cursor: pointer;
            font-size: 1.5rem;
        }
        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 40px 20px;
            margin-top: 50px;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
        }
        .footer-section h3 {
            color: var(--accent-color);
            margin-bottom: 20px;
        }
        friend-link {
            display: block;
            padding: 10px 0;
            border-bottom: 1px solid #444;
        }
        friend-link a {
            color: white;
        }
        friend-link a:hover {
            color: var(--secondary-color);
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #444;
            margin-top: 30px;
            font-size: 0.9rem;
            color: #aaa;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.4rem;
            }
            nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: var(--dark-color);
                padding: 20px;
                box-shadow: var(--shadow);
            }
            nav ul.active {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .header-container {
                padding: 15px;
            }
            .article-content {
                padding: 0 15px;
            }
        }
        .text-center {
            text-align: center;
        }
        .mb-30 {
            margin-bottom: 30px;
        }
        .last-updated {
            font-style: italic;
            color: #777;
            font-size: 0.9rem;
            text-align: right;
            margin-bottom: 20px;
        }