* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary-color: #2c7873;
            --secondary-color: #6fb3b8;
            --accent-color: #ffbe0b;
            --dark-color: #2d3436;
            --light-color: #f9f9f9;
            --text-color: #333;
            --gray-color: #dfe6e9;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 4rem;
            --border-radius: 8px;
            --shadow: 0 5px 15px rgba(0,0,0,0.08);
            --transition: all 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: var(--light-color);
            color: var(--text-color);
            line-height: 1.7;
            overflow-x: hidden;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        main {
            flex: 1;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--border-radius);
        }
        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-color);
        }
        ul, ol {
            padding-left: 1.5rem;
            margin-bottom: 1.5rem;
        }
        section {
            padding: var(--spacing-lg) 0;
        }
        .btn {
            display: inline-block;
            padding: 0.8rem 1.8rem;
            background-color: var(--primary-color);
            color: white;
            border: none;
            border-radius: 50px;
            cursor: pointer;
            font-weight: 600;
            text-align: center;
            transition: var(--transition);
            box-shadow: var(--shadow);
        }
        .btn:hover {
            background-color: var(--secondary-color);
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.12);
        }
        .section-title {
            text-align: center;
            margin-bottom: var(--spacing-md);
            color: var(--dark-color);
            position: relative;
            padding-bottom: 1rem;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: linear-gradient(to right, var(--primary-color), var(--accent-color));
            border-radius: 2px;
        }
        .site-header {
            background-color: white;
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 1.5rem;
        }
        .logo a {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-color);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .logo i {
            color: var(--accent-color);
        }
        .my-logo {
            font-family: 'Georgia', serif;
            font-style: italic;
            background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        .nav-desktop a {
            font-weight: 600;
            position: relative;
        }
        .nav-desktop a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--accent-color);
            transition: width 0.3s;
        }
        .nav-desktop a:hover::after {
            width: 100%;
        }
        .mobile-toggle {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--dark-color);
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background: white;
            padding: 1rem;
            box-shadow: inset 0 5px 10px rgba(0,0,0,0.05);
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            padding: 0.8rem 1rem;
            border-bottom: 1px solid var(--gray-color);
            font-weight: 600;
        }
        .nav-mobile a:last-child {
            border-bottom: none;
        }
        .breadcrumb {
            background-color: #f1f8ff;
            padding: 0.8rem 1.5rem;
            font-size: 0.9rem;
            color: #666;
            border-bottom: 1px solid var(--gray-color);
        }
        .breadcrumb a {
            color: #666;
        }
        .breadcrumb a:hover {
            color: var(--primary-color);
        }
        .hero {
            background: linear-gradient(rgba(44, 120, 115, 0.9), rgba(111, 179, 184, 0.8)), url('https://images.unsplash.com/photo-1526778548025-fa2f459cd5c1?ixlib=rb-4.0.3&auto=format&fit=crop&w=1600&q=80') center/cover no-repeat;
            color: white;
            text-align: center;
            padding: 5rem 1.5rem;
            border-radius: 0 0 30px 30px;
            margin-bottom: var(--spacing-lg);
        }
        .hero h1 {
            font-size: 3.2rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            text-shadow: 2px 2px 5px rgba(0,0,0,0.3);
        }
        @media (max-width: 768px) {
            .hero h1 { font-size: 2.5rem; }
        }
        .hero p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto 2rem;
        }
        .article-content {
            background: white;
            padding: var(--spacing-lg);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin-bottom: var(--spacing-lg);
        }
        .article-content h2 {
            color: var(--primary-color);
            margin: 2.5rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px dashed var(--gray-color);
        }
        .article-content h3 {
            color: var(--secondary-color);
            margin: 2rem 0 1rem;
        }
        .article-content h4 {
            color: var(--dark-color);
            margin: 1.5rem 0 1rem;
            font-style: italic;
        }
        .article-content p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .article-content blockquote {
            border-left: 5px solid var(--accent-color);
            padding-left: 1.5rem;
            margin: 2rem 0;
            font-style: italic;
            color: #555;
            background-color: #fffdf6;
            padding: 1.5rem;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .highlight {
            background-color: #fff9db;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            border-left: 4px solid var(--accent-color);
            margin: 2rem 0;
        }
        .img-container {
            margin: 2.5rem auto;
            text-align: center;
            max-width: 900px;
        }
        .img-caption {
            font-size: 0.9rem;
            color: #666;
            margin-top: 0.5rem;
            font-style: italic;
        }
        .feature-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .feature-card {
            background: #f8fdff;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            border-top: 4px solid var(--secondary-color);
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
            transition: var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-5px);
        }
        .feature-card i {
            font-size: 2rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        .interactive-modules {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin: 3rem 0;
        }
        .module {
            background: white;
            padding: 2rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .module h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.7rem;
        }
        .module h3 i {
            color: var(--accent-color);
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-control {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 1px solid var(--gray-color);
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(44, 120, 115, 0.2);
        }
        .star-rating {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            margin: 1rem 0;
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
        }
        .star-rating .star {
            transition: var(--transition);
        }
        .star-rating .star:hover,
        .star-rating .star.active {
            color: var(--accent-color);
        }
        .related-links {
            background-color: #f0f7f7;
            padding: 2rem;
            border-radius: var(--border-radius);
            margin: 3rem 0;
        }
        .related-links h3 {
            text-align: center;
            margin-bottom: 1.5rem;
        }
        .link-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1rem;
        }
        .link-grid a {
            background: white;
            padding: 0.7rem 1.5rem;
            border-radius: 50px;
            box-shadow: 0 3px 8px rgba(0,0,0,0.08);
            font-weight: 600;
        }
        .link-grid a:hover {
            background-color: var(--primary-color);
            color: white;
        }
        .site-footer {
            background-color: var(--dark-color);
            color: white;
            padding: var(--spacing-lg) 0 1.5rem;
            margin-top: auto;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
            margin-bottom: 3rem;
        }
        .footer-section h3 {
            color: var(--accent-color);
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-links a {
            display: block;
            color: #bbb;
            margin-bottom: 0.8rem;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            margin: 0.5rem 0;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #444;
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .nav-desktop { display: none; }
            .mobile-toggle { display: block; }
            .hero h1 { font-size: 2.8rem; }
            .section-title { font-size: 1.8rem; }
        }
        @media (max-width: 768px) {
            .hero { padding: 3rem 1rem; }
            .hero h1 { font-size: 2.2rem; }
            .article-content { padding: 1.5rem; }
            .interactive-modules { grid-template-columns: 1fr; }
            .feature-list { grid-template-columns: 1fr; }
        }
        @media (max-width: 480px) {
            .container { padding: 0 1rem; }
            .hero h1 { font-size: 1.8rem; }
            .btn { width: 100%; }
        }