* { 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%);
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 15px;
            position: relative;
        }
        body::before {
            content: '';
            position: fixed;
            top: 0; left: 0;
            width: 100%; height: 100%;
            background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><rect width="100" height="100" fill="%23ffffff" opacity="0.05"/><path d="M0,50 L100,50 M50,0 L50,100" stroke="%230074a8" stroke-width="0.5" opacity="0.3"/></svg>');
            z-index: -1;
        }
        .site-header {
            background: linear-gradient(90deg, #003366 0%, #0066aa 100%);
            color: white;
            padding: 1.2rem 0;
            border-bottom: 5px solid #ffcc00;
            box-shadow: 0 4px 12px rgba(0, 60, 120, 0.15);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-family: 'Impact', 'Arial Black', sans-serif;
            font-size: 2.2rem;
            text-decoration: none;
            color: #ffcc00;
            text-shadow: 2px 2px 0 #003366, 4px 4px 6px rgba(0,0,0,0.3);
            letter-spacing: 1px;
            transition: all 0.3s ease;
            padding: 5px 10px;
            border-radius: 5px;
            background: rgba(255,255,255,0.05);
        }
        .my-logo:hover {
            color: #fff;
            text-shadow: 2px 2px 0 #ffcc00, 4px 4px 8px rgba(0,0,0,0.4);
            transform: translateY(-2px);
        }
        .my-logo i { margin-right: 8px; color: #00a8ff; }
        .main-nav { display: flex; align-items: center; }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 1.8rem;
        }
        .nav-links a {
            color: #e6f2ff;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 8px 12px;
            border-radius: 4px;
            transition: all 0.3s ease;
            position: relative;
        }
        .nav-links a:hover,
        .nav-links a.active {
            background: rgba(255, 255, 255, 0.15);
            color: #ffcc00;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 12px;
            width: 0;
            height: 2px;
            background: #ffcc00;
            transition: width 0.3s ease;
        }
        .nav-links a:hover::after { width: calc(100% - 24px); }
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 5px;
            background: transparent;
            border: none;
            padding: 5px;
        }
        .hamburger span {
            width: 30px;
            height: 4px;
            background: #ffcc00;
            border-radius: 2px;
            transition: 0.3s;
        }
        .breadcrumb {
            padding: 1rem 0;
            background: #f0f8ff;
            border-radius: 0 0 8px 8px;
            margin-bottom: 1.5rem;
            font-size: 0.95rem;
            border-left: 4px solid #0066aa;
        }
        .breadcrumb a {
            color: #0066aa;
            text-decoration: none;
            font-weight: 500;
        }
        .breadcrumb a:hover { text-decoration: underline; }
        .breadcrumb .separator { margin: 0 10px; color: #888; }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            margin: 2rem 0;
        }
        @media (max-width: 1024px) {
            .content-wrapper { grid-template-columns: 1fr; }
        }
        .main-article {
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0, 60, 120, 0.1);
            border: 1px solid #d1e7ff;
        }
        .article-header { margin-bottom: 2.5rem; }
        .article-header h1 {
            font-size: 2.8rem;
            color: #003366;
            margin-bottom: 1rem;
            line-height: 1.2;
            border-bottom: 3px double #ffcc00;
            padding-bottom: 1rem;
        }
        .meta-info {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1rem;
            color: #666;
            font-size: 0.95rem;
            border-bottom: 1px solid #eee;
            padding-bottom: 1rem;
        }
        .update-time { color: #d9534f; font-weight: 600; }
        h2 {
            color: #0066aa;
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e6f2ff;
            font-size: 2rem;
        }
        h3 {
            color: #0099cc;
            margin: 2rem 0 1rem;
            font-size: 1.6rem;
        }
        h4 {
            color: #00a8e8;
            margin: 1.5rem 0 0.8rem;
            font-size: 1.3rem;
        }
        .article-content p {
            margin-bottom: 1.5rem;
            text-align: justify;
            hyphens: auto;
            font-size: 1.08rem;
        }
        .highlight {
            background: linear-gradient(120deg, #e6f7ff 0%, #d1f0ff 100%);
            border-left: 5px solid #0066aa;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
            box-shadow: inset 0 2px 4px rgba(0,0,0,0.05);
        }
        .key-term {
            font-weight: 800;
            color: #003366;
            background: #fff3cd;
            padding: 2px 6px;
            border-radius: 3px;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .stat-card {
            background: #f8f9fa;
            border: 1px solid #ced4da;
            border-radius: 8px;
            padding: 1.5rem;
            text-align: center;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .stat-value {
            font-size: 2.5rem;
            font-weight: bold;
            color: #0066aa;
            display: block;
            line-height: 1;
        }
        .stat-label {
            color: #666;
            font-size: 1rem;
            margin-top: 0.5rem;
        }
        .article-img {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: 10px;
            border: 3px solid #0066aa;
            box-shadow: 0 8px 16px rgba(0,0,0,0.15);
            margin: 2rem auto;
            display: block;
            transition: transform 0.5s ease;
        }
        .article-img:hover { transform: scale(1.02); }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .content-link {
            color: #0074a8;
            text-decoration: none;
            border-bottom: 1px dashed #0074a8;
            font-weight: 600;
            transition: all 0.2s ease;
        }
        .content-link:hover {
            color: #ff6600;
            border-bottom: 1px solid #ff6600;
            background: #fff9e6;
            padding: 0 2px;
        }
        .sidebar {
            background: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0, 60, 120, 0.1);
            border: 1px solid #d1e7ff;
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar-section {
            margin-bottom: 2.5rem;
        }
        .sidebar h3 {
            font-size: 1.4rem;
            color: #003366;
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #ffcc00;
        }
        .search-box { position: relative; }
        .search-box input {
            width: 100%;
            padding: 14px 20px;
            border: 2px solid #0066aa;
            border-radius: 50px;
            font-size: 1rem;
            transition: all 0.3s ease;
            outline: none;
        }
        .search-box input:focus {
            border-color: #ffcc00;
            box-shadow: 0 0 0 3px rgba(255, 204, 0, 0.3);
        }
        .search-box button {
            position: absolute;
            right: 6px;
            top: 6px;
            background: #0066aa;
            color: white;
            border: none;
            border-radius: 50%;
            width: 46px;
            height: 46px;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        .search-box button:hover {
            background: #ffcc00;
            color: #003366;
            transform: rotate(10deg);
        }
        .rating-widget, .comment-widget {
            background: #f8fbff;
            padding: 1.8rem;
            border-radius: 10px;
            border: 1px solid #cce7ff;
        }
        .stars {
            display: flex;
            gap: 8px;
            margin: 1rem 0;
            justify-content: center;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s, transform 0.2s;
        }
        .star:hover,
        .star.active { color: #ffcc00; transform: scale(1.2); }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .rating-form input,
        .comment-form input,
        .comment-form textarea {
            padding: 12px 15px;
            border: 1px solid #aad4ff;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .rating-form input:focus,
        .comment-form input:focus,
        .comment-form textarea:focus {
            border-color: #0066aa;
            outline: none;
            box-shadow: 0 0 0 3px rgba(0, 102, 170, 0.1);
        }
        .comment-form textarea {
            min-height: 150px;
            resize: vertical;
            font-family: inherit;
        }
        .submit-btn {
            background: linear-gradient(90deg, #0066aa, #0099cc);
            color: white;
            border: none;
            padding: 14px;
            border-radius: 8px;
            font-weight: bold;
            font-size: 1.1rem;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        .submit-btn:hover {
            background: linear-gradient(90deg, #ffcc00, #ff9900);
            color: #003366;
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(255, 204, 0, 0.4);
        }
        .site-footer {
            background: linear-gradient(90deg, #003366 0%, #001a33 100%);
            color: #e6f2ff;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
            border-top: 5px solid #ffcc00;
            border-radius: 12px 12px 0 0;
        }
        .footer-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 2rem;
        }
        .footer-section { flex: 1; min-width: 250px; }
        .footer-section h4 {
            color: #ffcc00;
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-links { list-style: none; }
        .footer-links li { margin-bottom: 0.8rem; }
        .footer-links a {
            color: #b3d9ff;
            text-decoration: none;
            transition: color 0.3s, padding-left 0.3s;
            display: block;
        }
        .footer-links a:hover {
            color: #ffcc00;
            padding-left: 8px;
        }
        friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.05);
            padding: 1rem;
            border-radius: 8px;
            margin: 1rem 0;
            border-left: 4px solid #ffcc00;
        }
        friend-link a {
            color: #ffcc00 !important;
            font-weight: bold;
        }
        .copyright {
            text-align: center;
            margin-top: 3rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
            color: #99ccff;
        }
        @media (max-width: 768px) {
            .header-container { flex-direction: column; align-items: flex-start; gap: 1rem; }
            .main-nav { width: 100%; justify-content: space-between; }
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #003366;
                padding: 1.5rem;
                border-radius: 8px;
                margin-top: 1rem;
                gap: 1rem;
            }
            .nav-links.active { display: flex; }
            .hamburger { display: flex; }
            .article-header h1 { font-size: 2.2rem; }
            .main-article { padding: 1.8rem; }
            .sidebar { padding: 1.5rem; }
            .stats-grid { grid-template-columns: 1fr; }
        }