:root {
            --primary-color: #1a237e;
            --secondary-color: #ff5722;
            --accent-color: #4caf50;
            --light-bg: #f5f7fa;
            --dark-text: #212121;
            --light-text: #757575;
            --border-color: #e0e0e0;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
            --max-width: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--dark-text);
            background-color: #fff;
            font-size: 1.05rem;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: var(--primary-color);
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary-color);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: #fff;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-color);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--secondary-color);
        }
        .my-logo:hover {
            color: var(--secondary-color);
        }
        .search-box {
            display: flex;
            max-width: 400px;
            width: 100%;
        }
        .search-box input {
            flex-grow: 1;
            padding: 12px 15px;
            border: 2px solid var(--border-color);
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
            outline: none;
        }
        .search-box input:focus {
            border-color: var(--primary-color);
        }
        .search-box button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 20px;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-box button:hover {
            background-color: var(--secondary-color);
        }
        nav {
            border-top: 1px solid var(--border-color);
            padding: 10px 0;
        }
        .nav-links {
            display: flex;
            list-style: none;
            justify-content: center;
            gap: 25px;
        }
        .nav-links a {
            font-weight: 600;
            padding: 8px 5px;
            position: relative;
        }
        .nav-links a:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background-color: var(--secondary-color);
            transition: var(--transition);
        }
        .nav-links a:hover:after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: var(--primary-color);
        }
        .breadcrumb {
            padding: 15px 0;
            background-color: var(--light-bg);
            margin-bottom: 20px;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li:not(:last-child):after {
            content: '/';
            margin: 0 10px;
            color: var(--light-text);
        }
        .breadcrumb a {
            color: var(--light-text);
        }
        .breadcrumb a:hover {
            color: var(--primary-color);
        }
        main {
            padding: 30px 0 50px;
        }
        .article-header {
            margin-bottom: 40px;
            text-align: center;
            padding: 0 10px;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-color);
            margin-bottom: 20px;
            line-height: 1.2;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
        }
        .article-meta {
            display: flex;
            justify-content: center;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
            color: var(--light-text);
            font-size: 0.95rem;
            margin-bottom: 20px;
        }
        .article-meta i {
            margin-right: 5px;
        }
        .intro {
            font-size: 1.3rem;
            color: var(--dark-text);
            max-width: 900px;
            margin: 0 auto 40px;
            text-align: center;
            font-weight: 300;
            border-left: 5px solid var(--accent-color);
            padding-left: 20px;
            text-align: left;
        }
        .content-section {
            margin-bottom: 50px;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary-color);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--border-color);
        }
        h3 {
            font-size: 1.6rem;
            color: var(--dark-text);
            margin: 30px 0 15px;
        }
        h4 {
            font-size: 1.3rem;
            color: var(--light-text);
            margin: 20px 0 10px;
        }
        p {
            margin-bottom: 20px;
            text-align: justify;
        }
        .highlight {
            background-color: rgba(255, 87, 34, 0.08);
            border-left: 4px solid var(--secondary-color);
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 4px 4px 0;
        }
        .featured-img {
            width: 100%;
            max-width: 800px;
            margin: 30px auto;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .featured-img figcaption {
            text-align: center;
            font-style: italic;
            padding: 10px;
            color: var(--light-text);
            font-size: 0.9rem;
            background-color: var(--light-bg);
        }
        .link-box {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 20px;
            margin: 30px 0;
        }
        .link-card {
            background: white;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 20px;
            transition: var(--transition);
            text-align: center;
        }
        .link-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow);
            border-color: var(--primary-color);
        }
        .link-card i {
            font-size: 2rem;
            color: var(--primary-color);
            margin-bottom: 15px;
        }
        .interactive-modules {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin: 50px 0;
        }
        .module {
            background-color: var(--light-bg);
            border-radius: 10px;
            padding: 25px;
            box-shadow: var(--shadow);
        }
        .module h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .module form {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .module input, .module textarea, .module select {
            padding: 12px 15px;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            font-family: inherit;
            font-size: 1rem;
            width: 100%;
        }
        .module textarea {
            min-height: 120px;
            resize: vertical;
        }
        .module button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 14px;
            border-radius: 4px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
        }
        .module button:hover {
            background-color: var(--secondary-color);
        }
        .star-rating {
            display: flex;
            justify-content: center;
            gap: 10px;
            font-size: 2rem;
            color: #ffc107;
            margin: 15px 0;
        }
        .star-rating i {
            cursor: pointer;
            transition: var(--transition);
        }
        .star-rating i:hover {
            transform: scale(1.2);
        }
        footer {
            background-color: var(--primary-color);
            color: white;
            padding: 50px 0 20px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 15px;
            color: white;
        }
        .footer-links h4, friend-link h4 {
            color: white;
            margin-bottom: 20px;
            font-size: 1.2rem;
        }
        .footer-links ul, friend-link ul {
            list-style: none;
        }
        .footer-links li, friend-link li {
            margin-bottom: 10px;
        }
        .footer-links a, friend-link a {
            color: #e0e0e0;
        }
        .footer-links a:hover, friend-link a:hover {
            color: var(--secondary-color);
            padding-left: 5px;
        }
        friend-link {
            display: block;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #b0b0b0;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .nav-links {
                gap: 15px;
            }
            .interactive-modules {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 768px) {
            .header-top {
                flex-wrap: wrap;
            }
            .search-box {
                order: 3;
                margin-top: 15px;
                width: 100%;
                max-width: 100%;
            }
            .hamburger {
                display: block;
            }
            .nav-links {
                flex-direction: column;
                position: fixed;
                top: 90px;
                left: -100%;
                width: 280px;
                height: calc(100vh - 90px);
                background-color: white;
                box-shadow: var(--shadow);
                padding: 30px;
                transition: var(--transition);
                align-items: flex-start;
            }
            .nav-links.active {
                left: 0;
            }
            .nav-links a {
                display: block;
                width: 100%;
                padding: 10px 0;
            }
            .intro {
                font-size: 1.15rem;
                padding-left: 15px;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
        }
        .text-center {
            text-align: center;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .bold {
            font-weight: 700;
            color: var(--primary-color);
        }
        .last-updated {
            background-color: #e8f5e9;
            padding: 10px 15px;
            border-radius: 4px;
            margin: 20px 0;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }