* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: #333;
            background-color: #f8f9fa;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: #1a73e8;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #0d47a1;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }
        header {
            background: linear-gradient(135deg, #1a237e, #3949ab);
            color: white;
            padding: 1.5rem 0;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 2.2rem;
            font-weight: 800;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo a:hover {
            text-decoration: none;
            opacity: 0.9;
        }
        .logo i {
            font-size: 2.5rem;
        }
        .my-logo {
            font-style: italic;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .nav-links a {
            color: white;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 0.5rem 1rem;
            border-radius: 5px;
        }
        .nav-links a:hover {
            background-color: rgba(255, 255, 255, 0.2);
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #e3f2fd;
            font-size: 0.95rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            gap: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "›";
            margin-left: 0.5rem;
            color: #666;
        }
        .breadcrumb a {
            color: #1a73e8;
        }
        main {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            padding: 2.5rem 0;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
        }
        .sidebar {
            background: white;
            padding: 1.8rem;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar h3 {
            color: #1a237e;
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid #3949ab;
        }
        .sidebar form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .sidebar input, .sidebar textarea, .sidebar select {
            padding: 0.8rem;
            border: 1px solid #ccc;
            border-radius: 8px;
            font-size: 1rem;
            width: 100%;
        }
        .sidebar button {
            padding: 0.9rem;
            background: #1a73e8;
            color: white;
            border: none;
            border-radius: 8px;
            font-weight: bold;
            cursor: pointer;
            transition: background 0.3s ease;
        }
        .sidebar button:hover {
            background: #0d47a1;
        }
        .update-time {
            font-size: 0.9rem;
            color: #666;
            text-align: center;
            margin-top: 1.5rem;
            font-style: italic;
        }
        h1 {
            font-size: 2.8rem;
            color: #1a237e;
            margin-bottom: 1.5rem;
            line-height: 1.3;
        }
        h2 {
            font-size: 2.2rem;
            color: #3949ab;
            margin-top: 2.5rem;
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e0e0e0;
        }
        h3 {
            font-size: 1.8rem;
            color: #5c6bc0;
            margin-top: 2rem;
            margin-bottom: 1rem;
        }
        h4 {
            font-size: 1.5rem;
            color: #7986cb;
            margin-top: 1.5rem;
            margin-bottom: 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.1rem;
        }
        .highlight {
            background-color: #e3f2fd;
            padding: 1.5rem;
            border-left: 5px solid #1a73e8;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .emoji {
            font-size: 1.2rem;
            margin-right: 5px;
        }
        b, strong {
            color: #1a237e;
        }
        .image-container {
            margin: 2rem auto;
            text-align: center;
        }
        .image-container img {
            border-radius: 10px;
            box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
            max-width: 800px;
            margin: 0 auto;
        }
        .image-container figcaption {
            font-size: 0.95rem;
            color: #666;
            margin-top: 0.5rem;
            font-style: italic;
        }
        .link-list {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            list-style: none;
            margin: 2rem 0;
            padding: 1.5rem;
            background-color: #f5f5f5;
            border-radius: 10px;
        }
        .link-list a {
            display: inline-block;
            padding: 0.5rem 1rem;
            background: #1a73e8;
            color: white;
            border-radius: 20px;
            font-weight: 600;
        }
        .link-list a:hover {
            background: #0d47a1;
            text-decoration: none;
            transform: translateY(-2px);
            transition: transform 0.3s ease;
        }
        footer {
            background: #1a237e;
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 2rem;
        }
        .footer-section {
            flex: 1;
            min-width: 250px;
        }
        .footer-section h3 {
            color: #bbdefb;
            margin-bottom: 1.5rem;
            font-size: 1.5rem;
        }
        friend-link {
            display: block;
            margin-bottom: 1rem;
            font-size: 1.1rem;
        }
        friend-link a {
            color: #bbdefb;
        }
        friend-link a:hover {
            color: white;
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid #3949ab;
            font-size: 0.95rem;
            color: #bbdefb;
        }
        @media (max-width: 768px) {
            .header-content {
                flex-direction: column;
                gap: 1.5rem;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                background-color: #1a237e;
                padding: 1.5rem;
                border-radius: 10px;
                margin-top: 1rem;
            }
            .nav-links.active {
                display: flex;
            }
            .hamburger {
                display: block;
                position: absolute;
                top: 1.5rem;
                right: 20px;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.9rem;
            }
            h3 {
                font-size: 1.6rem;
            }
            .article-content, .sidebar {
                padding: 1.8rem;
            }
            .link-list {
                flex-direction: column;
                align-items: center;
            }
        }