* { 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-color: #f9f7f0;
            background-image: linear-gradient(to bottom, #e8f4f8 0%, #f9f7f0 100%);
        }
        img { max-width: 100%; height: auto; display: block; }
        h1, h2, h3, h4 { font-family: 'Georgia', serif; color: #1a472a; margin-bottom: 1rem; line-height: 1.3; }
        h1 { font-size: 2.8rem; margin-top: 1.5rem; border-bottom: 4px solid #8b4513; padding-bottom: 0.5rem; }
        h2 { font-size: 2.2rem; margin-top: 2.5rem; padding-left: 0.75rem; border-left: 5px solid #27ae60; }
        h3 { font-size: 1.8rem; margin-top: 2rem; color: #2e8b57; }
        h4 { font-size: 1.4rem; margin-top: 1.5rem; color: #3a6b3a; }
        p { margin-bottom: 1.2rem; text-align: justify; }
        a { color: #2980b9; text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: #e74c3c; text-decoration: underline; }
        .lead { font-size: 1.3rem; color: #34495e; font-weight: 500; }
        .highlight { background-color: #fffacd; padding: 0.2rem 0.4rem; border-radius: 3px; }
        strong { color: #c0392b; }
        em { color: #7d3c98; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2.5rem;
        }
        @media (min-width: 992px) {
            .main-grid { grid-template-columns: 3fr 1fr; }
        }
        .site-header {
            background-color: #1a472a;
            color: white;
            padding: 1rem 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-family: 'Georgia', serif;
            font-size: 2.2rem;
            font-weight: bold;
            color: #f1c40f;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .my-logo:hover { color: #fff; text-decoration: none; }
        .my-logo i { font-size: 2rem; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: #ecf0f1;
            font-weight: 600;
            padding: 0.5rem 0.75rem;
            border-radius: 4px;
        }
        .main-nav a:hover { background-color: #27ae60; color: white; text-decoration: none; }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav {
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: #1a472a;
                padding: 1rem;
                transform: translateY(-100%);
                opacity: 0;
                transition: transform 0.3s ease, opacity 0.3s ease;
                box-shadow: 0 5px 10px rgba(0,0,0,0.2);
            }
            .main-nav.active {
                transform: translateY(0);
                opacity: 1;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0.5rem;
            }
        }
        .breadcrumb {
            padding: 1rem 0;
            font-size: 0.9rem;
            color: #7f8c8d;
            background-color: #ecf0f1;
            border-radius: 0 0 8px 8px;
        }
        .breadcrumb a { color: #2c3e50; }
        .breadcrumb span { color: #e74c3c; }
        .search-section {
            background-color: #2c3e50;
            padding: 1.5rem;
            border-radius: 10px;
            margin: 1.5rem 0;
            text-align: center;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-input {
            flex-grow: 1;
            padding: 0.9rem 1.2rem;
            border: none;
            border-radius: 50px 0 0 50px;
            font-size: 1.1rem;
        }
        .search-btn {
            background-color: #e74c3c;
            color: white;
            border: none;
            border-radius: 0 50px 50px 0;
            padding: 0 1.8rem;
            cursor: pointer;
            font-size: 1.2rem;
            transition: background-color 0.3s;
        }
        .search-btn:hover { background-color: #c0392b; }
        .content-card {
            background-color: white;
            border-radius: 12px;
            padding: 2rem;
            margin-bottom: 2rem;
            box-shadow: 0 6px 15px rgba(0,0,0,0.05);
            border: 1px solid #d5dbdb;
        }
        figure {
            margin: 2rem auto;
            text-align: center;
            max-width: 800px;
        }
        figcaption {
            font-style: italic;
            color: #7f8c8d;
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .article-image {
            border-radius: 10px;
            border: 3px solid #8b4513;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
        }
        .info-box {
            background-color: #e8f4f8;
            border-left: 5px solid #3498db;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .tip-box {
            background-color: #fff8e1;
            border: 2px dashed #f1c40f;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 10px;
        }
        .btn {
            display: inline-block;
            background-color: #27ae60;
            color: white;
            padding: 0.8rem 1.8rem;
            border-radius: 50px;
            font-weight: bold;
            border: none;
            cursor: pointer;
            transition: all 0.3s ease;
            text-align: center;
        }
        .btn:hover {
            background-color: #219653;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(39, 174, 96, 0.3);
            text-decoration: none;
        }
        .user-interaction {
            background-color: #f8f9fa;
            border-top: 3px solid #1a472a;
            padding: 2.5rem;
            margin-top: 3rem;
            border-radius: 12px;
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-top: 1.5rem;
        }
        .form-group { margin-bottom: 1.5rem; }
        .form-label { display: block; margin-bottom: 0.5rem; font-weight: 600; color: #2c3e50; }
        .form-input, .form-textarea, .form-select {
            width: 100%;
            padding: 0.9rem;
            border: 1px solid #bdc3c7;
            border-radius: 6px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-input:focus, .form-textarea:focus, .form-select:focus {
            outline: none;
            border-color: #27ae60;
            box-shadow: 0 0 0 3px rgba(39, 174, 96, 0.2);
        }
        .form-textarea { min-height: 150px; resize: vertical; }
        .stars { display: flex; gap: 0.5rem; margin: 0.5rem 0; }
        .star { font-size: 1.8rem; color: #ddd; cursor: pointer; transition: color 0.2s; }
        .star.active, .star:hover { color: #f1c40f; }
        .sidebar {
            background-color: white;
            border-radius: 12px;
            padding: 1.8rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            border: 1px solid #d5dbdb;
        }
        .sidebar h3 { margin-top: 0; }
        .sidebar ul { list-style: none; padding-left: 0; }
        .sidebar li { margin-bottom: 1rem; padding-bottom: 1rem; border-bottom: 1px dotted #eee; }
        .sidebar a { color: #2c3e50; font-weight: 500; }
        .related-links a { display: block; padding: 0.5rem 0; }
        .site-footer {
            background-color: #1a472a;
            color: #ecf0f1;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h4 { color: #f1c40f; border-left: none; padding-left: 0; }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            margin: 1rem 0;
        }
        .friend-links a {
            background-color: #2c3e50;
            color: white;
            padding: 0.6rem 1.2rem;
            border-radius: 4px;
            font-size: 0.9rem;
        }
        .friend-links a:hover { background-color: #34495e; text-decoration: none; }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #2c3e50;
            font-size: 0.9rem;
            color: #bdc3c7;
        }
        .text-center { text-align: center; }
        .mt-3 { margin-top: 3rem; }
        .mb-3 { margin-bottom: 3rem; }
        .last-updated { font-style: italic; color: #7f8c8d; font-size: 0.95rem; text-align: right; margin-top: 2rem; }