* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #f8f9fa;
            color: #333;
            line-height: 1.7;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        h1, h2, h3, h4 {
            color: #b22222;
            margin-bottom: 1rem;
            line-height: 1.3;
            font-weight: 700;
        }
        h1 {
            font-size: 2.8rem;
            text-align: center;
            margin-top: 1.5rem;
            border-bottom: 3px solid #ffcc00;
            padding-bottom: 1rem;
        }
        h2 {
            font-size: 2.2rem;
            margin-top: 2.5rem;
            border-left: 5px solid #b22222;
            padding-left: 15px;
        }
        h3 {
            font-size: 1.8rem;
            margin-top: 2rem;
            color: #d35400;
        }
        h4 {
            font-size: 1.4rem;
            margin-top: 1.5rem;
            color: #2c3e50;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
            font-size: 1.1rem;
        }
        a {
            color: #2980b9;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #e74c3c;
            text-decoration: underline;
        }
        strong {
            color: #2c3e50;
            font-weight: 800;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .last-updated {
            text-align: center;
            font-style: italic;
            color: #7f8c8d;
            margin: 1rem 0 2rem;
            font-size: 0.95rem;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            margin: 30px 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .site-header {
            background: linear-gradient(135deg, #b22222 0%, #2c3e50 100%);
            color: white;
            padding: 1rem 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            color: #ffcc00;
            text-decoration: none;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
            display: flex;
            align-items: center;
        }
        .my-logo i {
            margin-right: 10px;
            font-size: 2.5rem;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .main-nav li {
            margin-left: 1.8rem;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            padding: 8px 5px;
            border-bottom: 2px solid transparent;
            font-size: 1.1rem;
        }
        .main-nav a:hover {
            color: #ffcc00;
            border-bottom-color: #ffcc00;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: #ecf0f1;
            padding: 12px 0;
            margin-bottom: 20px;
            border-radius: 5px;
        }
        .breadcrumb ul {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li {
            margin-right: 10px;
            font-size: 0.95rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin-left: 10px;
            color: #7f8c8d;
        }
        .breadcrumb a {
            color: #2980b9;
        }
        .search-module {
            background: #fff;
            border-radius: 10px;
            padding: 25px;
            margin: 30px 0;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            border-top: 5px solid #2980b9;
        }
        .search-module h3 {
            margin-top: 0;
            color: #2980b9;
        }
        .search-form {
            display: flex;
            margin-top: 15px;
        }
        .search-input {
            flex-grow: 1;
            padding: 12px 15px;
            border: 2px solid #ddd;
            border-radius: 5px 0 0 5px;
            font-size: 1rem;
            outline: none;
            transition: border-color 0.3s;
        }
        .search-input:focus {
            border-color: #2980b9;
        }
        .search-button {
            background: #2980b9;
            color: white;
            border: none;
            padding: 0 25px;
            border-radius: 0 5px 5px 0;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            transition: background 0.3s;
        }
        .search-button:hover {
            background: #1c5a7a;
        }
        .user-interaction {
            background: #fff;
            border-radius: 10px;
            padding: 25px;
            margin: 40px 0;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            border-top: 5px solid #27ae60;
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-top: 20px;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: #2c3e50;
        }
        .form-control {
            width: 100%;
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: 5px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-control:focus {
            border-color: #27ae60;
            outline: none;
        }
        .star-rating {
            direction: rtl;
            display: inline-block;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            padding: 0 3px;
        }
        .star-rating input:checked ~ label,
        .star-rating label:hover,
        .star-rating label:hover ~ label {
            color: #ffcc00;
        }
        .submit-btn {
            background: #27ae60;
            color: white;
            border: none;
            padding: 14px 25px;
            border-radius: 5px;
            cursor: pointer;
            font-size: 1.1rem;
            font-weight: 600;
            transition: background 0.3s;
            display: block;
            width: 100%;
        }
        .submit-btn:hover {
            background: #1e8449;
        }
        .sidebar {
            background: #fff;
            border-radius: 10px;
            padding: 25px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            align-self: start;
            position: sticky;
            top: 130px;
        }
        .sidebar h3 {
            border-bottom: 2px solid #ffcc00;
            padding-bottom: 10px;
            margin-top: 0;
        }
        .sidebar ul {
            list-style: none;
            margin-top: 15px;
        }
        .sidebar li {
            margin-bottom: 12px;
            padding-bottom: 12px;
            border-bottom: 1px dashed #eee;
        }
        .sidebar li:last-child {
            border-bottom: none;
        }
        .article-content {
            background: #fff;
            border-radius: 10px;
            padding: 35px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .featured-image {
            margin: 30px 0;
            text-align: center;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
        }
        .featured-image figcaption {
            font-style: italic;
            color: #7f8c8d;
            padding: 10px;
            font-size: 0.9rem;
        }
        .highlight-box {
            background: #fff8e1;
            border-left: 5px solid #ffcc00;
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 5px 5px 0;
        }
        .tip {
            background: #e8f4fc;
            border-left: 5px solid #2980b9;
            padding: 15px;
            margin: 20px 0;
            border-radius: 0 5px 5px 0;
        }
        .site-footer {
            background: #2c3e50;
            color: #ecf0f1;
            padding: 40px 0 20px;
            margin-top: 50px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        .footer-section h4 {
            color: #ffcc00;
            border-bottom: 2px solid #b22222;
            padding-bottom: 10px;
            margin-top: 0;
        }
        friend-link {
            display: block;
            background: #34495e;
            padding: 15px;
            margin: 10px 0;
            border-radius: 5px;
            transition: transform 0.3s, background 0.3s;
        }
        friend-link:hover {
            background: #3d566e;
            transform: translateX(5px);
        }
        friend-link a {
            color: #ecf0f1;
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #34495e;
            font-size: 0.9rem;
            color: #bdc3c7;
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .header-inner {
                flex-direction: column;
                align-items: flex-start;
            }
            .my-logo {
                margin-bottom: 15px;
            }
            .hamburger {
                display: block;
                position: absolute;
                top: 20px;
                right: 20px;
            }
            .main-nav {
                width: 100%;
                display: none;
                margin-top: 15px;
            }
            .main-nav.active {
                display: block;
            }
            .main-nav ul {
                flex-direction: column;
            }
            .main-nav li {
                margin: 0;
                border-bottom: 1px solid #445566;
            }
            .main-nav a {
                display: block;
                padding: 12px 0;
            }
            .article-content {
                padding: 25px 20px;
            }
            .search-form {
                flex-direction: column;
            }
            .search-input {
                border-radius: 5px;
                margin-bottom: 10px;
            }
            .search-button {
                border-radius: 5px;
                padding: 12px;
            }
        }