* { 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;
        }
        img { max-width: 100%; height: auto; display: block; }
        h1, h2, h3, h4 { color: #1a5276; font-weight: 700; margin-bottom: 1rem; line-height: 1.3; }
        h1 { font-size: 2.8rem; margin-top: 1.5rem; text-align: center; border-bottom: 3px solid #3498db; padding-bottom: 0.5rem; }
        h2 { font-size: 2.2rem; margin-top: 2.5rem; padding-left: 0.5rem; border-left: 5px solid #e74c3c; }
        h3 { font-size: 1.8rem; margin-top: 2rem; color: #2980b9; }
        h4 { font-size: 1.4rem; margin-top: 1.5rem; color: #16a085; }
        p { margin-bottom: 1.5rem; font-size: 1.1rem; text-align: justify; }
        .lead { font-size: 1.3rem; font-weight: 500; color: #34495e; }
        .highlight { background-color: #fffacd; padding: 0.2rem 0.4rem; border-radius: 3px; }
        em { color: #7f8c8d; }
        strong { color: #c0392b; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        main.container { padding-top: 2rem; padding-bottom: 3rem; }
        header {
            background: linear-gradient(to right, #1a5276, #2c3e50);
            color: white;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
        }
        .my-logo {
            font-family: 'Georgia', serif;
            font-size: 2.5rem;
            font-weight: bold;
            color: #f1c40f;
            text-decoration: none;
            letter-spacing: 1px;
            transition: color 0.3s;
        }
        .my-logo:hover { color: #fff; }
        .search-box {
            display: flex;
            max-width: 400px;
            width: 100%;
        }
        .search-box input {
            flex-grow: 1;
            padding: 0.8rem;
            border: none;
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }
        .search-box button {
            background-color: #e74c3c;
            color: white;
            border: none;
            border-radius: 0 4px 4px 0;
            padding: 0 1.5rem;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-box button:hover { background-color: #c0392b; }
        nav { background-color: #2c3e50; }
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            position: relative;
        }
        .nav-links {
            display: flex;
            list-style: none;
        }
        .nav-links li { position: relative; }
        .nav-links a {
            color: #ecf0f1;
            text-decoration: none;
            padding: 1rem 1.5rem;
            display: block;
            transition: background 0.3s;
            font-weight: 500;
        }
        .nav-links a:hover, .nav-links a.active { background-color: #3498db; }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #f8f9fa;
            border-bottom: 1px solid #ddd;
        }
        .breadcrumb a {
            color: #3498db;
            text-decoration: none;
        }
        .breadcrumb a:hover { text-decoration: underline; }
        article { background-color: white; padding: 2.5rem; border-radius: 10px; box-shadow: 0 5px 25px rgba(0,0,0,0.05); margin-bottom: 2rem; }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-bottom: 1.5rem;
            border-bottom: 1px dashed #bdc3c7;
            margin-bottom: 2rem;
            font-style: italic;
            color: #7f8c8d;
        }
        .featured-img {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: 8px;
            margin: 2rem 0;
            border: 5px solid #ecf0f1;
        }
        .content-block { margin-bottom: 3rem; }
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin: 2rem 0;
        }
        .tip-card {
            background: #f8f9fa;
            padding: 1.5rem;
            border-radius: 8px;
            border-top: 4px solid #3498db;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .tip-card:hover { transform: translateY(-5px); box-shadow: 0 10px 20px rgba(0,0,0,0.1); }
        .stats-box {
            background: linear-gradient(to right, #1a5276, #3498db);
            color: white;
            padding: 2rem;
            border-radius: 10px;
            margin: 2rem 0;
            text-align: center;
        }
        blockquote {
            border-left: 5px solid #f1c40f;
            padding-left: 2rem;
            margin: 2rem 0;
            font-style: italic;
            color: #555;
            background-color: #f9f9f9;
            padding: 1.5rem;
            border-radius: 0 8px 8px 0;
        }
        .interactive-section {
            background-color: #f8f9fa;
            padding: 2rem;
            border-radius: 10px;
            margin: 3rem 0;
            border: 1px solid #ddd;
        }
        .form-group { margin-bottom: 1.5rem; }
        .form-group label { display: block; margin-bottom: 0.5rem; font-weight: 600; color: #2c3e50; }
        .form-group input, .form-group textarea, .form-group select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #bdc3c7;
            border-radius: 4px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-group input:focus, .form-group textarea:focus { border-color: #3498db; outline: none; }
        .btn {
            background-color: #2ecc71;
            color: white;
            border: none;
            padding: 0.8rem 2rem;
            border-radius: 4px;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            transition: background 0.3s;
        }
        .btn:hover { background-color: #27ae60; }
        .rating { display: flex; gap: 0.5rem; margin: 1rem 0; }
        .rating input { display: none; }
        .rating label { font-size: 2rem; color: #ddd; cursor: pointer; transition: color 0.2s; }
        .rating input:checked ~ label, .rating label:hover, .rating label:hover ~ label { color: #f1c40f; }
        footer {
            background: linear-gradient(to right, #2c3e50, #1a5276);
            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: #f1c40f; margin-bottom: 1.5rem; font-size: 1.5rem; }
        .footer-links { list-style: none; }
        .footer-links li { margin-bottom: 0.8rem; }
        .footer-links a { color: #bdc3c7; text-decoration: none; transition: color 0.3s; }
        .footer-links a:hover { color: #3498db; }
        friend-link {
            display: block;
            background-color: #34495e;
            padding: 1rem;
            border-radius: 5px;
            margin: 0.5rem 0;
        }
        friend-link a { color: #f1c40f; font-weight: bold; }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #4a6572;
            color: #bdc3c7;
            font-size: 0.95rem;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 2rem; }
            .header-top { flex-direction: column; gap: 1rem; }
            .search-box { max-width: 100%; }
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .nav-links {
                position: fixed;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: #2c3e50;
                flex-direction: column;
                clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
                transition: clip-path 0.4s ease-in-out;
                z-index: 999;
            }
            .nav-links.active { clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%); top: 100%; }
            .nav-links li { width: 100%; text-align: center; }
            .nav-links a { padding: 1rem; }
            article { padding: 1.5rem; }
            .tips-grid { grid-template-columns: 1fr; }
        }