* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #0a0e17;
            color: #e0e0e0;
            line-height: 1.7;
            overflow-x: hidden;
        }
        a {
            color: #4dabf7;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #74c0fc;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #121a2b 0%, #1a2332 100%);
            border-bottom: 1px solid #2a3446;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(90deg, #00a8ff, #0097e6);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            letter-spacing: -0.5px;
        }
        .my-logo:hover {
            opacity: 0.9;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: #b0b7c3;
            font-weight: 500;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover {
            color: #fff;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: #00a8ff;
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: #b0b7c3;
            cursor: pointer;
            padding: 0.5rem;
        }
        .breadcrumb {
            padding: 1rem 0;
            font-size: 0.9rem;
            color: #8a94a6;
            border-bottom: 1px solid #2a3446;
            margin-bottom: 2rem;
        }
        .breadcrumb a {
            color: #8a94a6;
        }
        .breadcrumb a:hover {
            color: #fff;
        }
        .breadcrumb span {
            margin: 0 0.5rem;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding: 2rem 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background: rgba(26, 35, 50, 0.7);
            border-radius: 12px;
            padding: 2.5rem;
            border: 1px solid #2a3446;
        }
        .article-header {
            margin-bottom: 2.5rem;
            padding-bottom: 1.5rem;
            border-bottom: 2px solid #00a8ff;
        }
        .article-header h1 {
            font-size: 2.8rem;
            line-height: 1.2;
            margin-bottom: 1rem;
            color: #ffffff;
            text-shadow: 0 2px 4px rgba(0,0,0,0.5);
        }
        .meta-info {
            display: flex;
            gap: 1.5rem;
            color: #8a94a6;
            font-size: 0.95rem;
        }
        .meta-info i {
            margin-right: 0.5rem;
        }
        h2 {
            font-size: 2rem;
            color: #4dabf7;
            margin: 3rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid #2a3446;
        }
        h3 {
            font-size: 1.6rem;
            color: #a5d8ff;
            margin: 2.5rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #c5e6ff;
            margin: 2rem 0 1rem;
        }
        p {
            margin-bottom: 1.8rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            color: #c5e6ff;
            font-weight: 300;
            margin-bottom: 2.5rem;
            padding-left: 1rem;
            border-left: 4px solid #00a8ff;
        }
        .highlight {
            background: rgba(0, 168, 255, 0.1);
            border-left: 4px solid #00a8ff;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .key-term {
            font-weight: bold;
            color: #ffd43b;
        }
        .article-image {
            margin: 2.5rem auto;
            border-radius: 8px;
            overflow: hidden;
            border: 1px solid #3a4558;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
            max-width: 800px;
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: #8a94a6;
            padding: 0.8rem;
            font-size: 0.95rem;
            background: rgba(42, 52, 70, 0.5);
        }
        ul, ol {
            margin: 1.5rem 0 1.5rem 2rem;
        }
        li {
            margin-bottom: 0.8rem;
        }
        .interactive-section {
            background: rgba(42, 52, 70, 0.5);
            border-radius: 10px;
            padding: 2rem;
            margin: 3rem 0;
            border: 1px solid #3a4558;
        }
        .interactive-section h3 {
            margin-top: 0;
            color: #ffd43b;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            color: #b0b7c3;
            font-weight: 500;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.9rem;
            background: #1a2332;
            border: 1px solid #3a4558;
            border-radius: 6px;
            color: #fff;
            font-size: 1rem;
            transition: border 0.3s ease;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #00a8ff;
        }
        .form-row {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1.5rem;
        }
        .btn {
            display: inline-block;
            background: linear-gradient(90deg, #00a8ff, #0097e6);
            color: white;
            padding: 0.9rem 2rem;
            border: none;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-align: center;
        }
        .btn:hover {
            background: linear-gradient(90deg, #0097e6, #0088cc);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0, 168, 255, 0.3);
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: #555;
            margin: 1rem 0;
        }
        .star-rating .star {
            cursor: pointer;
            transition: color 0.2s;
        }
        .star-rating .star:hover,
        .star-rating .star.active {
            color: #ffd43b;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background: rgba(26, 35, 50, 0.7);
            border-radius: 10px;
            padding: 1.8rem;
            border: 1px solid #2a3446;
        }
        .sidebar-widget h3 {
            font-size: 1.4rem;
            color: #4dabf7;
            margin-top: 0;
            margin-bottom: 1.2rem;
            padding-bottom: 0.7rem;
            border-bottom: 1px solid #2a3446;
        }
        .related-links ul {
            list-style: none;
            margin: 0;
        }
        .related-links li {
            margin-bottom: 0.9rem;
            padding-bottom: 0.9rem;
            border-bottom: 1px dashed #3a4558;
        }
        .related-links a {
            display: block;
            padding: 0.5rem 0;
            color: #b0b7c3;
        }
        .related-links a:hover {
            color: #fff;
            padding-left: 0.5rem;
        }
        .update-time {
            background: rgba(0, 168, 255, 0.1);
            padding: 1.2rem;
            border-radius: 8px;
            text-align: center;
            font-size: 0.95rem;
            color: #a5d8ff;
        }
        .update-time i {
            margin-right: 0.5rem;
            color: #ffd43b;
        }
        .site-footer {
            background: #121a2b;
            border-top: 1px solid #2a3446;
            padding: 3rem 0 2rem;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
            margin-bottom: 2.5rem;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 800;
            color: #00a8ff;
            margin-bottom: 1rem;
        }
        .footer-nav h4 {
            color: #b0b7c3;
            margin-bottom: 1.5rem;
            font-size: 1.2rem;
        }
        .footer-nav ul {
            list-style: none;
            margin: 0;
        }
        .footer-nav li {
            margin-bottom: 0.8rem;
        }
        .footer-nav a {
            color: #8a94a6;
        }
        .footer-nav a:hover {
            color: #fff;
        }
        friend-link {
            display: block;
            background: rgba(42, 52, 70, 0.5);
            padding: 1.5rem;
            border-radius: 8px;
            margin-top: 2rem;
            border: 1px solid #3a4558;
        }
        friend-link h4 {
            color: #ffd43b;
            margin-bottom: 1rem;
        }
        friend-link a {
            display: inline-block;
            margin-right: 1rem;
            margin-bottom: 0.8rem;
            color: #74c0fc;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid #2a3446;
            color: #8a94a6;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .header-content {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
            }
            .main-nav {
                width: 100%;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.5s ease;
            }
            .main-nav.active {
                max-height: 500px;
                margin-top: 1rem;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
            }
            .main-nav li {
                border-bottom: 1px solid #2a3446;
            }
            .main-nav a {
                display: block;
                padding: 1rem 0;
            }
            .article-header h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            .article-content {
                padding: 1.8rem;
            }
            .interactive-section {
                padding: 1.5rem;
            }
        }