* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #2c3e50;
            background: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a { text-decoration: none; color: #2980b9; transition: color 0.3s ease, transform 0.2s; }
        a:hover { color: #1a5276; transform: translateY(-1px); }
        img { max-width: 100%; height: auto; display: block; }
        .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        .visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
        .site-header {
            background: linear-gradient(90deg, #1a2980, #26d0ce);
            color: white;
            padding: 1rem 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-family: 'Arial Black', Gadget, sans-serif;
            font-size: 2.2rem;
            background: linear-gradient(to right, #ffd700, #ffeb3b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
            letter-spacing: 1px;
        }
        .my-logo:hover { transform: scale(1.05); }
        .main-nav ul { display: flex; list-style: none; gap: 1.5rem; }
        .main-nav a { color: white; font-weight: 600; padding: 0.5rem 1rem; border-radius: 4px; }
        .main-nav a:hover, .main-nav a.active { background: rgba(255,255,255,0.2); }
        .hamburger { display: none; font-size: 1.8rem; cursor: pointer; }
        .breadcrumb {
            background: #ecf0f1;
            padding: 0.8rem;
            border-radius: 5px;
            margin: 1rem 0;
            font-size: 0.9rem;
        }
        .breadcrumb a { color: #7f8c8d; }
        .breadcrumb a:hover { color: #34495e; }
        main { flex: 1; padding: 2rem 0; }
        .article-header { margin-bottom: 2.5rem; text-align: center; }
        .article-header h1 {
            font-size: 2.8rem;
            color: #1a2980;
            margin-bottom: 1rem;
            line-height: 1.2;
            text-shadow: 1px 1px 3px rgba(0,0,0,0.1);
        }
        .article-meta {
            color: #7f8c8d;
            font-size: 0.95rem;
            display: flex;
            justify-content: center;
            gap: 1rem;
            flex-wrap: wrap;
        }
        .hero-image {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: 10px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.2);
            margin: 2rem 0;
            transition: transform 0.5s ease;
        }
        .hero-image:hover { transform: scale(1.01); }
        .content-section {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin-bottom: 2rem;
        }
        h2 {
            color: #26d0ce;
            border-left: 5px solid #1a2980;
            padding-left: 15px;
            margin: 2rem 0 1.5rem;
            font-size: 2rem;
        }
        h3 { color: #1a2980; margin: 1.8rem 0 1rem; font-size: 1.6rem; }
        h4 { color: #34495e; margin: 1.5rem 0 0.8rem; font-size: 1.3rem; }
        p { margin-bottom: 1.2rem; text-align: justify; }
        .highlight { background: #e8f4fc; padding: 1.5rem; border-left: 4px solid #3498db; border-radius: 0 5px 5px 0; margin: 1.5rem 0; }
        .key-point { font-weight: bold; color: #e74c3c; }
        .inline-link { font-weight: 600; border-bottom: 2px dotted #3498db; }
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .tip-card {
            background: #f8f9fa;
            padding: 1.5rem;
            border-radius: 8px;
            border-top: 4px solid #2ecc71;
            transition: all 0.3s ease;
        }
        .tip-card:hover { transform: translateY(-5px); box-shadow: 0 8px 20px rgba(0,0,0,0.1); }
        .interactive-module {
            background: linear-gradient(145deg, #ffffff, #f0f5f9);
            border: 1px solid #d1e0ed;
            border-radius: 10px;
            padding: 2rem;
            margin: 3rem 0;
        }
        .module-title { text-align: center; color: #1a2980; margin-bottom: 1.5rem; }
        .form-group { margin-bottom: 1.2rem; }
        label { display: block; margin-bottom: 0.5rem; font-weight: 600; color: #2c3e50; }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #bdc3c7;
            border-radius: 5px;
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus { outline: none; border-color: #3498db; box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2); }
        .btn {
            display: inline-block;
            background: linear-gradient(to right, #1a2980, #26d0ce);
            color: white;
            padding: 0.8rem 1.8rem;
            border: none;
            border-radius: 50px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
            text-align: center;
        }
        .btn:hover { background: linear-gradient(to right, #26d0ce, #1a2980); transform: translateY(-3px); box-shadow: 0 7px 14px rgba(0,0,0,0.2); }
        .rating-stars { display: flex; gap: 5px; font-size: 1.8rem; color: #f1c40f; margin: 1rem 0; }
        .rating-stars i { cursor: pointer; transition: color 0.2s; }
        .rating-stars i:hover { color: #f39c12; }
        .site-footer {
            background: #2c3e50;
            color: #ecf0f1;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 2rem; margin-bottom: 2rem; }
        .footer-section h3 { color: #26d0ce; margin-bottom: 1.2rem; }
        .friend-links { display: flex; flex-wrap: wrap; gap: 1rem; list-style: none; }
        .friend-links a { color: #bdc3c7; }
        .friend-links a:hover { color: #26d0ce; }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #34495e;
            font-size: 0.9rem;
            color: #95a5a6;
        }
        @media (max-width: 768px) {
            .header-content { flex-wrap: wrap; }
            .hamburger { display: block; }
            .main-nav { width: 100%; display: none; margin-top: 1rem; }
            .main-nav.active { display: block; }
            .main-nav ul { flex-direction: column; gap: 0.5rem; }
            .article-header h1 { font-size: 2rem; }
            h2 { font-size: 1.7rem; }
            .content-section { padding: 1.5rem; }
            .tips-grid { grid-template-columns: 1fr; }
        }