* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            min-height: 100vh;
            color: #2d3748;
            line-height: 1.6;
        }

        .container {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 20px;
        }

        header {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 20px 0;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
        }

        .logo {
            font-size: 24px;
            font-weight: 700;
            text-decoration: none;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .logo i {
            font-size: 28px;
        }

        nav ul {
            display: flex;
            list-style: none;
            gap: 25px;
        }

        nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .breadcrumb {
            background: white;
            padding: 15px 0;
            border-bottom: 1px solid #e2e8f0;
        }

        .breadcrumb-list {
            display: flex;
            align-items: center;
            gap: 10px;
            list-style: none;
            list-style-type: none;
            margin: 0;
            padding: 0;
            padding-left: 0;
            font-size: 14px;
            color: #718096;
        }

        .breadcrumb-list li {
            list-style: none;
            list-style-type: none;
            display: flex;
            align-items: center;
        }

        .breadcrumb-list a {
            color: #667eea;
            text-decoration: none;
        }

        .breadcrumb-list li::after {
            content: '/';
            margin-left: 10px;
            color: #cbd5e0;
        }

        .breadcrumb-list li:last-child::after {
            display: none;
        }

        .main-content {
            padding: 40px 0;
        }

        .article-container {
            background: white;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
        }

        .article-cover {
            width: 100%;
            height: 300px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 80px;
        }

        .article-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .article-header {
            padding: 40px 40px 20px;
        }

        .article-category {
            display: inline-block;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 13px;
            margin-bottom: 15px;
        }

        .article-title {
            font-size: 28px;
            font-weight: 700;
            color: white;
            line-height: 1.4;
            margin-bottom: 20px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            color: #ccc;
            font-size: 14px;
            padding-bottom: 20px;
            border-bottom: 1px solid #e2e8f0;
        }

        .article-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .article-content {
            padding: 30px 40px;
            font-size: 16px;
            line-height: 1.8;
            color: #4a5568;
        }

        .article-content p {
            margin-bottom: 20px;
        }

        .article-content h2,
        .article-content h3 {
            margin: 30px 0 15px;
            color: #2d3748;
        }

        .article-content img {
            max-width: 100%;
            border-radius: 10px;
            margin: 20px 0;
        }

        .article-content a {
            color: #667eea;
            text-decoration: none;
        }

        .article-content a:hover {
            text-decoration: underline;
        }

        .article-footer {
            padding: 20px 40px 40px;
            border-top: 1px solid #e2e8f0;
        }

        .article-nav {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .nav-item {
            padding: 15px 20px;
            background: #f7fafc;
            border-radius: 10px;
            text-decoration: none;
            color: #4a5568;
            transition: all 0.3s;
        }

        .nav-item:hover {
            background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
        }

        .nav-item.prev {
            text-align: left;
        }

        .nav-item.next {
            text-align: right;
        }

        .nav-label {
            font-size: 12px;
            color: #a0aec0;
            margin-bottom: 5px;
        }

        .nav-title {
            font-size: 14px;
            font-weight: 600;
            color: #2d3748;
        }

        .back-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: #667eea;
            text-decoration: none;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .back-link:hover {
            color: #764ba2;
        }

        footer {
            background: #2d3748;
            color: #a0aec0;
            padding: 40px 0 20px;
            margin-top: 60px;
        }

        .footer-content {
            text-align: center;
        }

        .footer-links {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .footer-links a {
            color: #a0aec0;
            text-decoration: none;
        }

        .copyright {
            font-size: 14px;
            color: #718096;
        }

        @media (max-width: 768px) {
            .article-header,
            .article-content,
            .article-footer {
                padding-left: 20px;
                padding-right: 20px;
            }

            .article-title {
                font-size: 22px;
            }

            .article-cover {
                height: 200px;
            }

            .article-nav {
                grid-template-columns: 1fr;
            }

            .header-content {
                flex-direction: column;
                text-align: center;
            }

            nav ul {
                flex-wrap: wrap;
                justify-content: center;
            }
        }