* { 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: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a { color: #2c5aa0; text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: #d4af37; }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: #1a2b4c;
            color: #fff;
            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-family: Georgia, serif;
            font-size: 2.2rem;
            font-weight: bold;
            color: #d4af37;
            text-shadow: 1px 1px 3px #000;
        }
        .my-logo span { color: #fff; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: #e6e6e6;
            font-weight: 500;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover,
        .main-nav a.active { color: #d4af37; }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: #d4af37;
            transition: width 0.3s;
        }
        .main-nav a:hover::after { width: 100%; }
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 4px;
            padding: 5px;
        }
        .hamburger span {
            width: 25px;
            height: 3px;
            background: #d4af37;
            border-radius: 2px;
            transition: 0.3s;
        }
        .hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
        .hamburger.active span:nth-child(2) { opacity: 0; }
        .hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(7px, -6px); }
        .breadcrumb {
            padding: 1rem 0;
            background: #f0f4f8;
            border-bottom: 1px solid #d1dbe5;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin-left: 0.5rem;
            color: #777;
        }
        .main-content {
            flex: 1;
            padding: 2rem 0 4rem;
        }
        article {
            background: #fff;
            border-radius: 12px;
            padding: 3rem;
            box-shadow: 0 6px 25px rgba(0, 0, 0, 0.08);
            margin-bottom: 2rem;
        }
        .article-header {
            text-align: center;
            margin-bottom: 3rem;
            padding-bottom: 2rem;
            border-bottom: 2px dashed #e0e6ef;
        }
        h1 {
            font-size: 2.8rem;
            color: #1a2b4c;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .article-meta {
            color: #666;
            font-style: italic;
            margin-top: 1rem;
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 1rem;
            flex-wrap: wrap;
        }
        .update-time {
            background: #e8f4fd;
            padding: 0.3rem 0.8rem;
            border-radius: 20px;
            font-size: 0.9rem;
        }
        h2 {
            font-size: 2rem;
            color: #2c5aa0;
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid #e0e6ef;
        }
        h3 {
            font-size: 1.6rem;
            color: #3a6bc2;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #555;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            color: #444;
            font-weight: 500;
            background: #f8fafd;
            padding: 1.5rem;
            border-left: 5px solid #d4af37;
            border-radius: 0 8px 8px 0;
            margin: 2rem 0;
        }
        .highlight-box {
            background: linear-gradient(to right, #fff8e1, #fef9e7);
            border-left: 5px solid #f1c40f;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .highlight-box strong { color: #b7950b; }
        .feature-img {
            width: 80%;
            margin: 2.5rem auto;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            border: 8px solid #fff;
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .interactive-section {
            background: #f9fbfe;
            border: 1px solid #d1dbe5;
            border-radius: 10px;
            padding: 2rem;
            margin: 3rem 0;
        }
        .interactive-section h3 { margin-top: 0; }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #444;
        }
        .form-control {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 1px solid #ccc;
            border-radius: 6px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-control:focus {
            outline: none;
            border-color: #2c5aa0;
            box-shadow: 0 0 0 3px rgba(44, 90, 160, 0.1);
        }
        .btn {
            display: inline-block;
            background: linear-gradient(to right, #2c5aa0, #3a6bc2);
            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: linear-gradient(to right, #1a3d7a, #2c5aa0);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(44, 90, 160, 0.2);
        }
        .rating {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .rating input { display: none; }
        .rating label {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .rating input:checked ~ label,
        .rating label:hover,
        .rating label:hover ~ label { color: #ffc107; }
        .related-links {
            background: #f0f4f8;
            padding: 2rem;
            border-radius: 10px;
            margin: 3rem 0;
        }
        .related-links h3 { text-align: center; }
        .link-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1rem;
            margin-top: 1.5rem;
        }
        .link-card {
            background: #fff;
            padding: 1.2rem;
            border-radius: 8px;
            border-left: 4px solid #2c5aa0;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .link-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.08);
        }
        .site-footer {
            background: #1a2b4c;
            color: #e6e6e6;
            padding: 3rem 0 1.5rem;
            margin-top: auto;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-logo { font-size: 1.8rem; }
        friend-link {
            display: block;
            margin: 0.5rem 0;
            color: #d4af37;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #2c3e5c;
            font-size: 0.9rem;
            color: #aaa;
        }
        @media (max-width: 768px) {
            .hamburger { display: flex; }
            .main-nav ul {
                position: fixed;
                top: 80px;
                left: -100%;
                flex-direction: column;
                background: #1a2b4c;
                width: 100%;
                text-align: center;
                padding: 2rem 0;
                transition: 0.5s;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
                gap: 0;
            }
            .main-nav ul.active { left: 0; }
            .main-nav li { margin: 1rem 0; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            article { padding: 1.5rem; }
            .feature-img { width: 100%; }
            .header-container, .footer-container { flex-direction: column; text-align: center; }
            .link-grid { grid-template-columns: 1fr; }
        }