* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f9f9f9;
            max-width: 100vw;
            overflow-x: hidden;
        }
        a {
            color: #4a6fa5;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #2a4a7c;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #1a2a4a 0%, #2d4a7a 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;
        }
        .logo a.my-logo {
            font-family: 'Arial Black', sans-serif;
            font-size: 2rem;
            color: #ffcc00;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
            letter-spacing: 1px;
        }
        .logo a.my-logo:hover {
            color: #ffdb4d;
        }
        nav ul {
            display: flex;
            list-style: none;
        }
        nav ul li {
            margin-left: 1.5rem;
        }
        nav ul li a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 0.75rem;
            border-radius: 4px;
        }
        nav ul li a:hover,
        nav ul li a.active {
            background-color: rgba(255, 255, 255, 0.15);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: white;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #eaeaea;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '>';
            margin: 0 10px;
            color: #777;
        }
        .breadcrumb a {
            color: #555;
        }
        .breadcrumb a:hover {
            color: #1a2a4a;
        }
        main {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 30px 0;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
        }
        article {
            background: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        aside {
            background: white;
            padding: 25px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        h1 {
            font-size: 2.8rem;
            color: #1a2a4a;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid #ffcc00;
            padding-bottom: 15px;
        }
        h2 {
            font-size: 2rem;
            color: #2d4a7a;
            margin: 2rem 0 1rem;
            padding-top: 10px;
        }
        h3 {
            font-size: 1.6rem;
            color: #4a6fa5;
            margin: 1.8rem 0 0.8rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #666;
            margin: 1.5rem 0 0.5rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        strong {
            color: #1a2a4a;
            font-weight: 700;
        }
        .highlight {
            background-color: #fff9e6;
            padding: 20px;
            border-left: 5px solid #ffcc00;
            margin: 25px 0;
            font-style: italic;
        }
        .update-time {
            font-size: 0.9rem;
            color: #777;
            text-align: right;
            margin-bottom: 30px;
            border-bottom: 1px dashed #ccc;
            padding-bottom: 10px;
        }
        .content-links {
            margin: 25px 0;
            padding: 20px;
            background-color: #f0f7ff;
            border-radius: 8px;
        }
        .content-links h3 {
            margin-top: 0;
        }
        .content-links ul {
            list-style: none;
            columns: 2;
        }
        .content-links li {
            margin-bottom: 10px;
        }
        @media (max-width: 768px) {
            .content-links ul {
                columns: 1;
            }
        }
        .featured-img {
            margin: 30px 0;
            text-align: center;
        }
        .featured-img img {
            border-radius: 10px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
            max-width: 800px;
            margin: 0 auto;
        }
        .img-caption {
            font-size: 0.9rem;
            color: #666;
            margin-top: 10px;
            font-style: italic;
        }
        .interactive-section {
            margin: 40px 0;
            padding: 25px;
            background: #f8f9fa;
            border-radius: 10px;
            border: 1px solid #dee2e6;
        }
        .interactive-section h3 {
            margin-top: 0;
            color: #1a2a4a;
        }
        form {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        label {
            margin-bottom: 5px;
            font-weight: 600;
            color: #555;
        }
        input, textarea, select {
            padding: 12px 15px;
            border: 1px solid #ccc;
            border-radius: 6px;
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            border-color: #4a6fa5;
            outline: none;
        }
        button {
            background: linear-gradient(to right, #4a6fa5, #2d4a7a);
            color: white;
            border: none;
            padding: 14px 25px;
            border-radius: 6px;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            transition: all 0.3s ease;
            align-self: flex-start;
        }
        button:hover {
            background: linear-gradient(to right, #2d4a7a, #1a2a4a);
            transform: translateY(-2px);
            box-shadow: 0 5px 10px rgba(0,0,0,0.1);
        }
        .star-rating {
            display: flex;
            gap: 10px;
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
        }
        .star-rating .star:hover,
        .star-rating .star.active {
            color: #ffcc00;
        }
        .sidebar-widget {
            margin-bottom: 30px;
        }
        .sidebar-widget h4 {
            border-bottom: 2px solid #ffcc00;
            padding-bottom: 8px;
            margin-bottom: 15px;
        }
        .sidebar-widget ul {
            list-style: none;
        }
        .sidebar-widget li {
            margin-bottom: 12px;
            padding-left: 20px;
            position: relative;
        }
        .sidebar-widget li::before {
            content: '▸';
            position: absolute;
            left: 0;
            color: #4a6fa5;
        }
        footer {
            background: #1a2a4a;
            color: #ddd;
            padding: 50px 0 20px;
            margin-top: 50px;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 30px;
        }
        .footer-logo {
            font-size: 1.8rem;
            color: #ffcc00;
            font-weight: bold;
            margin-bottom: 15px;
        }
        .footer-section h4 {
            color: white;
            margin-bottom: 20px;
            font-size: 1.2rem;
        }
        .footer-section ul {
            list-style: none;
        }
        .footer-section li {
            margin-bottom: 10px;
        }
        .footer-section a {
            color: #aaa;
        }
        .footer-section a:hover {
            color: #ffcc00;
        }
        friend-link {
            display: block;
            background: rgba(255,255,255,0.05);
            padding: 15px;
            border-radius: 6px;
            margin-top: 10px;
            border-left: 3px solid #ffcc00;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #2d4a7a;
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
            }
            nav ul {
                display: none;
                flex-direction: column;
                width: 100%;
                background-color: #1a2a4a;
                position: absolute;
                top: 100%;
                left: 0;
                padding: 20px;
                box-shadow: 0 5px 10px rgba(0,0,0,0.2);
            }
            nav ul.active {
                display: flex;
            }
            nav ul li {
                margin: 10px 0;
                margin-left: 0;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.4rem;
            }
            article, aside {
                padding: 20px;
            }
            .interactive-section {
                padding: 20px;
            }
        }