* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        body {
            background-color: #f8f9fa;
            color: #333;
            line-height: 1.7;
            overflow-x: hidden;
        }
        a {
            color: #2563eb;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #1d4ed8;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 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-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: white;
        }
        .my-logo span {
            color: #60a5fa;
        }
        .main-nav {
            display: flex;
            gap: 2rem;
        }
        .main-nav a {
            color: #dbeafe;
            font-weight: 600;
            font-size: 1.05rem;
        }
        .main-nav a:hover {
            color: white;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: #e0f2fe;
            padding: 0.8rem 0;
            font-size: 0.9rem;
            color: #475569;
        }
        .breadcrumb a {
            color: #475569;
        }
        .hero {
            background: linear-gradient(rgba(30, 58, 138, 0.85), rgba(30, 58, 138, 0.9)), url('https://images.unsplash.com/photo-1541534741688-6078c6bfb5c5?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80') center/cover no-repeat;
            color: white;
            text-align: center;
            padding: 4rem 2rem;
            margin-bottom: 3rem;
            border-radius: 0 0 12px 12px;
        }
        .hero h1 {
            font-size: 3.2rem;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .hero p {
            font-size: 1.3rem;
            max-width: 800px;
            margin: 0 auto;
            opacity: 0.9;
        }
        .content-area {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin: 2.5rem 0;
        }
        main {
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 6px 16px rgba(0, 0, 0, 0.05);
        }
        aside {
            background: white;
            padding: 1.8rem;
            border-radius: 12px;
            box-shadow: 0 6px 16px rgba(0, 0, 0, 0.05);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        h1 {
            color: #1e3a8a;
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            border-bottom: 3px solid #60a5fa;
            padding-bottom: 0.5rem;
        }
        h2 {
            color: #1e40af;
            font-size: 2.1rem;
            margin: 2.8rem 0 1.2rem;
            padding-top: 0.5rem;
        }
        h3 {
            color: #1d4ed8;
            font-size: 1.7rem;
            margin: 2.2rem 0 1rem;
        }
        h4 {
            color: #2563eb;
            font-size: 1.4rem;
            margin: 1.8rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .intro {
            font-size: 1.25rem;
            color: #475569;
            font-weight: 500;
            margin-bottom: 2.5rem;
            background: #f0f9ff;
            padding: 1.5rem;
            border-left: 5px solid #2563eb;
            border-radius: 0 8px 8px 0;
        }
        .highlight {
            background-color: #fef3c7;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
            border-left: 5px solid #f59e0b;
        }
        .image-block {
            margin: 2.5rem auto;
            text-align: center;
            max-width: 800px;
        }
        .image-block img {
            border-radius: 10px;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
            margin-bottom: 0.8rem;
        }
        .caption {
            font-size: 0.95rem;
            color: #64748b;
            font-style: italic;
        }
        blockquote {
            font-size: 1.3rem;
            color: #475569;
            border-left: 5px solid #10b981;
            padding: 1.5rem 2rem;
            margin: 2.5rem 0;
            background-color: #f0fdf4;
            border-radius: 0 8px 8px 0;
        }
        .stat-box {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2.5rem 0;
        }
        .stat-item {
            background: linear-gradient(145deg, #3b82f6, #1d4ed8);
            color: white;
            padding: 1.8rem;
            border-radius: 10px;
            text-align: center;
            box-shadow: 0 6px 12px rgba(59, 130, 246, 0.3);
        }
        .stat-num {
            font-size: 2.8rem;
            font-weight: 800;
            display: block;
            line-height: 1;
        }
        .stat-desc {
            font-size: 1.1rem;
            margin-top: 0.5rem;
            opacity: 0.9;
        }
        .link-list {
            background: #f8fafc;
            padding: 1.8rem;
            border-radius: 10px;
            margin: 2rem 0;
        }
        .link-list h4 {
            margin-top: 0;
            color: #334155;
        }
        .link-list ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 0.8rem;
        }
        .link-list li:before {
            content: "🔗";
            margin-right: 8px;
        }
        .module {
            background: #f1f5f9;
            padding: 2rem;
            border-radius: 10px;
            margin: 3rem 0;
        }
        .module h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .module form {
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
            max-width: 500px;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        label {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: #475569;
        }
        input, textarea, select {
            padding: 0.9rem 1rem;
            border: 1px solid #cbd5e1;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s, box-shadow 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #3b82f6;
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
        }
        button, .btn {
            background: linear-gradient(to right, #3b82f6, #1d4ed8);
            color: white;
            border: none;
            padding: 1rem 1.8rem;
            border-radius: 8px;
            font-weight: 700;
            font-size: 1.05rem;
            cursor: pointer;
            transition: transform 0.3s, box-shadow 0.3s;
            text-align: center;
            display: inline-block;
        }
        button:hover, .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 12px rgba(59, 130, 246, 0.4);
            text-decoration: none;
        }
        .rating {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
            direction: ltr;
        }
        .rating input {
            display: none;
        }
        .rating label {
            font-size: 2rem;
            color: #cbd5e1;
            cursor: pointer;
            transition: color 0.3s;
        }
        .rating label:hover,
        .rating label:hover ~ label,
        .rating input:checked ~ label {
            color: #f59e0b;
        }
        .update-time {
            text-align: center;
            font-size: 0.95rem;
            color: #64748b;
            background: #e2e8f0;
            padding: 0.8rem;
            border-radius: 6px;
            margin-top: 3rem;
        }
        .sidebar-widget {
            margin-bottom: 2.5rem;
            padding-bottom: 2rem;
            border-bottom: 1px solid #e2e8f0;
        }
        .sidebar-widget:last-child {
            border-bottom: none;
            margin-bottom: 0;
        }
        .sidebar-widget h4 {
            color: #1e3a8a;
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #dbeafe;
        }
        .related-links li {
            margin-bottom: 0.8rem;
            padding-left: 1.2rem;
            position: relative;
        }
        .related-links li:before {
            content: "▶";
            position: absolute;
            left: 0;
            color: #3b82f6;
            font-size: 0.8rem;
        }
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 800;
            color: white;
            margin-bottom: 1rem;
        }
        .footer-links h5 {
            color: white;
            font-size: 1.2rem;
            margin-bottom: 1.2rem;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.7rem;
        }
        .footer-links a {
            color: #94a3b8;
        }
        .footer-links a:hover {
            color: #60a5fa;
        }
        friend-link {
            display: block;
            background: #1e293b;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 1.5rem 0;
            border-left: 4px solid #3b82f6;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #334155;
            font-size: 0.9rem;
            color: #94a3b8;
        }
        @media (max-width: 992px) {
            .content-area {
                grid-template-columns: 1fr;
            }
            aside {
                position: static;
            }
            .hero h1 {
                font-size: 2.6rem;
            }
            h1 {
                font-size: 2.4rem;
            }
            h2 {
                font-size: 1.9rem;
            }
        }
        @media (max-width: 768px) {
            .main-nav {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: #1e3a8a;
                padding: 1.5rem;
                gap: 1.2rem;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
            }
            .main-nav.active {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .header-container {
                flex-wrap: wrap;
            }
            .hero {
                padding: 3rem 1.5rem;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            main, aside {
                padding: 1.8rem;
            }
            .stat-box {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .hero h1 {
                font-size: 1.9rem;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            .module {
                padding: 1.5rem;
            }
            button, .btn {
                padding: 0.9rem 1.5rem;
            }
        }