* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f8f9fa;
            max-width: 100vw;
            overflow-x: hidden;
        }
        a {
            color: #1a73e8;
            text-decoration: none;
            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);
            border: 0;
        }
        .site-header {
            background: linear-gradient(135deg, #0a3d62 0%, #1e5799 100%);
            color: white;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: #ffde59;
            text-shadow: 2px 2px 0 #ff6b6b;
            letter-spacing: -0.5px;
        }
        .my-logo:hover {
            color: #ffc107;
            text-decoration: none;
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        .main-nav a {
            color: #e0f7fa;
            font-weight: 600;
            padding: 8px 5px;
            border-bottom: 3px solid transparent;
        }
        .main-nav a:hover,
        .main-nav a:focus {
            color: #ffde59;
            border-bottom-color: #ffde59;
            text-decoration: none;
        }
        .breadcrumb {
            background-color: #e3f2fd;
            padding: 12px 0;
            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: #666;
        }
        .search-box {
            background-color: #4a69bd;
            padding: 20px 0;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-input {
            flex-grow: 1;
            padding: 14px 20px;
            border: none;
            border-radius: 50px 0 0 50px;
            font-size: 1rem;
        }
        .search-button {
            background: #ffde59;
            color: #0a3d62;
            border: none;
            padding: 0 30px;
            border-radius: 0 50px 50px 0;
            font-weight: bold;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-button:hover {
            background: #ffc107;
        }
        .content-main {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 40px 0;
        }
        @media (max-width: 992px) {
            .content-main {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background: white;
            border-radius: 12px;
            padding: 40px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.08);
        }
        .article-meta {
            color: #666;
            font-size: 0.95rem;
            margin-bottom: 25px;
            padding-bottom: 15px;
            border-bottom: 1px dashed #ddd;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
        }
        .update-time {
            color: #e53935;
            font-weight: 600;
        }
        h1 {
            color: #0a3d62;
            font-size: 2.8rem;
            margin-bottom: 25px;
            line-height: 1.2;
        }
        h2 {
            color: #1a73e8;
            font-size: 2rem;
            margin: 45px 0 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #e3f2fd;
        }
        h3 {
            color: #2d3436;
            font-size: 1.6rem;
            margin: 35px 0 15px;
        }
        h4 {
            color: #555;
            font-size: 1.3rem;
            margin: 25px 0 10px;
        }
        p {
            margin-bottom: 22px;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            color: #444;
            font-weight: 500;
            background-color: #f1f8ff;
            padding: 20px;
            border-left: 5px solid #1a73e8;
            border-radius: 0 8px 8px 0;
            margin-bottom: 35px;
        }
        .highlight-box {
            background: linear-gradient(to right, #fff9e6, #fff);
            border: 1px solid #ffde59;
            padding: 25px;
            border-radius: 10px;
            margin: 30px 0;
        }
        .img-container {
            margin: 35px auto;
            text-align: center;
        }
        .img-container img {
            border-radius: 10px;
            box-shadow: 0 8px 25px rgba(0,0,0,0.15);
            border: 5px solid white;
        }
        .caption {
            font-style: italic;
            color: #666;
            margin-top: 10px;
            font-size: 0.95rem;
        }
        .related-links {
            background-color: #f1f8ff;
            padding: 20px;
            border-radius: 10px;
            margin: 30px 0;
        }
        .related-links h4 {
            margin-top: 0;
            color: #1a73e8;
        }
        .related-links ul {
            list-style: square inside;
            padding-left: 15px;
        }
        .related-links li {
            margin-bottom: 8px;
        }
        .sidebar {
            background: white;
            border-radius: 12px;
            padding: 25px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.08);
            align-self: start;
            position: sticky;
            top: 140px;
        }
        .widget {
            margin-bottom: 35px;
        }
        .widget-title {
            color: #0a3d62;
            font-size: 1.4rem;
            margin-bottom: 15px;
            padding-bottom: 8px;
            border-bottom: 2px solid #ffde59;
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            font-size: 2rem;
            color: #ddd;
            margin: 15px 0;
            cursor: pointer;
        }
        .stars .active,
        .stars:hover .star {
            color: #ffde59;
        }
        .star:hover ~ .star {
            color: #ddd;
        }
        .rate-btn {
            background: #4a69bd;
            color: white;
            border: none;
            padding: 10px 25px;
            border-radius: 50px;
            cursor: pointer;
            font-weight: bold;
            transition: background 0.3s;
            display: block;
            width: 100%;
            margin-top: 15px;
        }
        .rate-btn:hover {
            background: #0a3d62;
        }
        .comments-section {
            margin-top: 50px;
            background: white;
            border-radius: 12px;
            padding: 40px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.08);
        }
        .comment-form label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
        }
        .comment-form input,
        .comment-form textarea {
            width: 100%;
            padding: 12px 15px;
            margin-bottom: 20px;
            border: 1px solid #ccc;
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
        }
        .comment-form textarea {
            min-height: 150px;
            resize: vertical;
        }
        .submit-btn {
            background: linear-gradient(to right, #1a73e8, #4a69bd);
            color: white;
            border: none;
            padding: 15px 35px;
            border-radius: 50px;
            font-size: 1.1rem;
            font-weight: bold;
            cursor: pointer;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .submit-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 7px 15px rgba(26, 115, 232, 0.4);
        }
        .site-footer {
            background: #1a237e;
            color: #e3f2fd;
            padding: 50px 0 25px;
            margin-top: 60px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 800;
            color: #ffde59;
            margin-bottom: 15px;
        }
        friend-link {
            display: block;
            margin: 8px 0;
            color: #bbdefb;
        }
        friend-link:hover {
            color: #ffde59;
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 25px;
            border-top: 1px solid #3949ab;
            font-size: 0.9rem;
            color: #90caf9;
        }
        @media (max-width: 768px) {
            .mobile-toggle {
                display: block;
            }
            .main-nav {
                position: fixed;
                top: 80px;
                left: 0;
                width: 100%;
                background: #0a3d62;
                clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
                transition: clip-path 0.4s ease;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
            }
            .main-nav.active {
                clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
            }
            .main-nav ul {
                flex-direction: column;
                padding: 20px;
                gap: 0;
            }
            .main-nav li {
                border-bottom: 1px solid #1e5799;
            }
            .main-nav a {
                display: block;
                padding: 15px;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .article-content,
            .comments-section {
                padding: 25px;
            }
            .header-top {
                padding: 12px 0;
            }
        }
        @media print {
            .site-header, .search-box, .sidebar, .comments-section, .site-footer, .mobile-toggle {
                display: none;
            }
            .content-main {
                grid-template-columns: 1fr;
                gap: 0;
            }
            body {
                background: white;
                font-size: 12pt;
            }
            a {
                color: black;
                text-decoration: underline;
            }
        }