* { 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: #333;
            background-color: #f8f9fa;
            max-width: 100vw;
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; }
        h1, h2, h3, h4 { color: #2c3e50; margin-bottom: 1rem; font-weight: 700; line-height: 1.3; }
        h1 { font-size: 2.8rem; margin-top: 1.5rem; }
        h2 { font-size: 2.2rem; margin-top: 2.5rem; padding-bottom: 0.5rem; border-bottom: 2px solid #ecf0f1; }
        h3 { font-size: 1.8rem; margin-top: 2rem; color: #3498db; }
        h4 { font-size: 1.4rem; margin-top: 1.5rem; color: #7f8c8d; }
        p { margin-bottom: 1.5rem; text-align: justify; }
        a { color: #2980b9; text-decoration: none; transition: color 0.3s; }
        a:hover { color: #e74c3c; }
        strong { color: #2c3e50; }
        em { color: #16a085; }
        .lead { font-size: 1.3rem; color: #5a6c7d; font-weight: 300; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            margin: 30px 0;
        }
        @media (max-width: 992px) {
            .content-wrapper { grid-template-columns: 1fr; }
        }
        .site-header {
            background: linear-gradient(135deg, #2c3e50, #3498db);
            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: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i { color: #f1c40f; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 25px;
        }
        .main-nav a {
            color: #ecf0f1;
            font-weight: 600;
            padding: 8px 5px;
            border-radius: 4px;
        }
        .main-nav a:hover {
            background-color: rgba(255,255,255,0.15);
            color: #f1c40f;
        }
        .breadcrumb {
            background-color: #ecf0f1;
            padding: 12px 20px;
            border-radius: 5px;
            margin: 15px 0;
            font-size: 0.9rem;
        }
        .breadcrumb a { color: #7f8c8d; }
        .breadcrumb span { color: #34495e; }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav ul {
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: #2c3e50;
                padding: 20px;
                display: none;
                box-shadow: 0 5px 10px rgba(0,0,0,0.2);
            }
            .main-nav.active ul { display: flex; }
        }
        main { background-color: white; padding: 30px; border-radius: 10px; box-shadow: 0 5px 15px rgba(0,0,0,0.05); }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: #95a5a6;
            font-size: 0.9rem;
            margin-bottom: 2rem;
            padding-bottom: 1rem;
            border-bottom: 1px dashed #bdc3c7;
        }
        .featured-image {
            margin: 2.5rem 0;
            border-radius: 8px;
            overflow: hidden;
            border: 5px solid #ecf0f1;
        }
        .featured-image figcaption {
            text-align: center;
            font-style: italic;
            color: #7f8c8d;
            padding: 10px;
            background-color: #f8f9fa;
        }
        aside.sidebar {
            background-color: #f8f9fa;
            padding: 25px;
            border-radius: 10px;
            height: fit-content;
            border-left: 5px solid #3498db;
        }
        .sidebar-widget {
            margin-bottom: 30px;
        }
        .sidebar-widget h3 {
            font-size: 1.4rem;
            color: #2c3e50;
            margin-bottom: 15px;
            padding-bottom: 8px;
            border-bottom: 1px solid #dfe6e9;
        }
        .interaction-module {
            background: linear-gradient(to right, #f8f9fa, #e8f4fc);
            border: 1px solid #d1ecf1;
            border-radius: 10px;
            padding: 25px;
            margin: 2.5rem 0;
        }
        .interaction-module h3 { color: #0c5460; }
        .interaction-module form {
            display: grid;
            gap: 15px;
            margin-top: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 5px;
            font-weight: 600;
            color: #2c3e50;
        }
        .form-control {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #bdc3c7;
            border-radius: 6px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-control:focus {
            outline: none;
            border-color: #3498db;
            box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
        }
        textarea.form-control { min-height: 120px; resize: vertical; }
        .btn {
            display: inline-block;
            background: linear-gradient(to right, #3498db, #2980b9);
            color: white;
            padding: 12px 25px;
            border: none;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            text-align: center;
        }
        .btn:hover {
            background: linear-gradient(to right, #2980b9, #1c6ea4);
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        }
        .star-rating {
            display: flex;
            gap: 10px;
            font-size: 1.8rem;
            color: #f1c40f;
            margin: 10px 0;
        }
        .star-rating i { cursor: pointer; transition: transform 0.2s; }
        .star-rating i:hover { transform: scale(1.2); }
        .related-links {
            background-color: #e8f4fc;
            padding: 20px;
            border-radius: 8px;
            margin: 2rem 0;
        }
        .related-links h3 { color: #2c3e50; }
        .related-links ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 15px;
            margin-top: 15px;
        }
        .related-links li a {
            display: block;
            padding: 12px 15px;
            background-color: white;
            border-radius: 6px;
            border-left: 4px solid #3498db;
            transition: all 0.3s;
        }
        .related-links li a:hover {
            background-color: #3498db;
            color: white;
            transform: translateX(5px);
        }
        .site-footer {
            background-color: #2c3e50;
            color: #ecf0f1;
            padding: 40px 0 20px;
            margin-top: 50px;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
        }
        .footer-widget h4 {
            color: #f1c40f;
            font-size: 1.3rem;
            margin-bottom: 20px;
            border-bottom: 1px solid #4a6572;
            padding-bottom: 10px;
        }
        friend-link {
            display: block;
            color: #bdc3c7;
            margin-bottom: 10px;
        }
        friend-link a { color: #bdc3c7; }
        friend-link a:hover { color: #f1c40f; }
        .copyright {
            text-align: center;
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid #4a6572;
            color: #95a5a6;
            font-size: 0.9rem;
        }
        .text-center { text-align: center; }
        .mb-3 { margin-bottom: 1rem; }
        .mt-3 { margin-top: 1rem; }
        .py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
        .highlight {
            background-color: #fffacd;
            padding: 20px;
            border-left: 5px solid #f1c40f;
            border-radius: 0 8px 8px 0;
            margin: 2rem 0;
        }
        .tip-box {
            background-color: #e1f5fe;
            border: 1px solid #81d4fa;
            padding: 20px;
            border-radius: 8px;
            margin: 1.5rem 0;
        }
        .tip-box i { color: #0288d1; margin-right: 10px; }