* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f8f9fa;
            max-width: 100vw;
            overflow-x: hidden;
        }
        a {
            color: #3a6ea5;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #004e98;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .text-center { text-align: center; }
        .bold { font-weight: 700; }
        .italic { font-style: italic; }
        .highlight {
            background-color: #fffacd;
            padding: 2px 5px;
            border-radius: 3px;
        }
        .site-header {
            background: linear-gradient(135deg, #1a2a3a 0%, #2c3e50 100%);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-family: 'Arial Black', Gadget, sans-serif;
            font-size: 1.8rem;
            color: #4fc3f7;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo:hover {
            color: #81d4fa;
        }
        .my-logo i {
            font-size: 2rem;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 1.5rem;
        }
        .main-nav a {
            color: #ecf0f1;
            font-weight: 600;
            padding: 0.5rem 0.75rem;
            border-radius: 4px;
        }
        .main-nav a:hover, .main-nav a.active {
            background-color: rgba(76, 175, 80, 0.2);
            color: #a5d6a7;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: #e9ecef;
            padding: 0.75rem 20px;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin: 0 10px;
            color: #6c757d;
        }
        .breadcrumb a {
            color: #495057;
        }
        .breadcrumb a:hover {
            color: #004e98;
        }
        main {
            padding: 2rem 0;
            background-color: white;
        }
        .article-header {
            margin-bottom: 3rem;
            border-bottom: 3px solid #eee;
            padding-bottom: 1.5rem;
        }
        h1 {
            font-size: 2.8rem;
            line-height: 1.2;
            color: #1a2a3a;
            margin-bottom: 1rem;
        }
        .article-meta {
            color: #666;
            font-size: 0.95rem;
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            margin-bottom: 1rem;
        }
        .article-meta i {
            margin-right: 5px;
        }
        .content-area {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        @media (max-width: 992px) {
            .content-area {
                grid-template-columns: 1fr;
            }
        }
        article {
            font-size: 1.1rem;
        }
        h2 {
            font-size: 2.2rem;
            color: #2c3e50;
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #4fc3f7;
        }
        h3 {
            font-size: 1.8rem;
            color: #34495e;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.5rem;
            color: #5a6c7d;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .intro {
            font-size: 1.3rem;
            color: #2c3e50;
            background-color: #f1f8ff;
            padding: 1.5rem;
            border-left: 5px solid #4fc3f7;
            margin-bottom: 2.5rem;
            border-radius: 0 8px 8px 0;
        }
        .feature-img {
            width: 100%;
            border-radius: 10px;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
            margin: 2rem 0;
        }
        .info-box {
            background: #e8f4fc;
            border: 1px solid #b3e0ff;
            border-radius: 8px;
            padding: 1.5rem;
            margin: 2rem 0;
        }
        .info-box h3 {
            margin-top: 0;
            color: #0066cc;
        }
        aside {
            background-color: #f8f9fa;
            border-radius: 10px;
            padding: 1.5rem;
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .widget {
            margin-bottom: 2.5rem;
        }
        .widget-title {
            font-size: 1.4rem;
            color: #2c3e50;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #ddd;
        }
        .search-form {
            display: flex;
            margin-bottom: 1.5rem;
        }
        .search-form input {
            flex-grow: 1;
            padding: 0.8rem;
            border: 1px solid #ccc;
            border-radius: 5px 0 0 5px;
            font-size: 1rem;
        }
        .search-form button {
            background-color: #3a6ea5;
            color: white;
            border: none;
            padding: 0 1.2rem;
            border-radius: 0 5px 5px 0;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-form button:hover {
            background-color: #004e98;
        }
        .link-list {
            list-style: none;
        }
        .link-list li {
            margin-bottom: 0.8rem;
            padding-bottom: 0.8rem;
            border-bottom: 1px dashed #ddd;
        }
        .link-list a {
            display: block;
            padding: 0.5rem;
            border-radius: 5px;
        }
        .link-list a:hover {
            background-color: #e3f2fd;
        }
        .rating-widget {
            background: white;
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin-top: 2rem;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 5px;
            margin: 1rem 0;
            font-size: 2rem;
            color: #ffc107;
            cursor: pointer;
        }
        .stars i:hover {
            transform: scale(1.2);
        }
        .comment-form textarea {
            width: 100%;
            padding: 1rem;
            border: 1px solid #ccc;
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
            margin-bottom: 1rem;
            resize: vertical;
            min-height: 120px;
        }
        .btn {
            display: inline-block;
            background-color: #4fc3f7;
            color: white;
            padding: 0.8rem 1.8rem;
            border: none;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        .btn:hover {
            background-color: #03a9f4;
            transform: translateY(-2px);
            box-shadow: 0 5px 10px rgba(0,0,0,0.1);
        }
        .btn-block {
            display: block;
            width: 100%;
            text-align: center;
        }
        .site-footer {
            background-color: #1a2a3a;
            color: #b0bec5;
            padding: 3rem 0 1.5rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-widget h3 {
            color: #4fc3f7;
            margin-bottom: 1.5rem;
            font-size: 1.4rem;
        }
        friend-link {
            display: block;
            margin-bottom: 1rem;
        }
        friend-link a {
            color: #81d4fa;
        }
        friend-link a:hover {
            color: #ffffff;
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #2c3e50;
            font-size: 0.9rem;
            color: #78909c;
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.9rem; }
            h3 { font-size: 1.6rem; }
            .header-container { flex-wrap: wrap; }
            .main-nav {
                display: none;
                width: 100%;
                order: 3;
                margin-top: 1rem;
            }
            .main-nav.active {
                display: block;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
            }
            .main-nav li {
                border-bottom: 1px solid #34495e;
            }
            .main-nav a {
                display: block;
                padding: 1rem;
            }
            .hamburger {
                display: block;
            }
            .content-area {
                gap: 2rem;
            }
            aside {
                position: static;
            }
        }