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

        body {
            font-family: 'Microsoft YaHei', Arial, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
        }

        .fbcw-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .fbcw-header {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 1rem 0;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }

        .fbcw-nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }

        .fbcw-logo {
            font-size: 1.5rem;
            font-weight: bold;
        }

        .fbcw-nav-menu {
            display: flex;
            gap: 2rem;
            flex-wrap: wrap;
        }

        .fbcw-nav-link {
            color: white;
            text-decoration: none;
            padding: 0.5rem 1rem;
            border-radius: 5px;
            transition: background-color 0.3s ease;
        }

        .fbcw-nav-link:hover {
            background-color: rgba(255,255,255,0.2);
        }

        .fbcw-hero {
            background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
            color: white;
            padding: 4rem 0;
            text-align: center;
        }

        .fbcw-hero-title {
            font-size: 3rem;
            margin-bottom: 1rem;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }

        .fbcw-hero-subtitle {
            font-size: 1.2rem;
            margin-bottom: 2rem;
            opacity: 0.9;
        }

        .fbcw-main-content {
            padding: 4rem 0;
        }

        .fbcw-tutorial-section {
            background: white;
            border-radius: 10px;
            padding: 3rem;
            margin-bottom: 2rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }

        .fbcw-section-title {
            font-size: 2rem;
            color: #2c3e50;
            margin-bottom: 1.5rem;
            border-left: 4px solid #3498db;
            padding-left: 1rem;
        }

        .fbcw-step-container {
            margin-bottom: 2rem;
        }

        .fbcw-step-number {
            display: inline-block;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            text-align: center;
            line-height: 40px;
            font-weight: bold;
            margin-right: 1rem;
            margin-bottom: 1rem;
        }

        .fbcw-step-title {
            font-size: 1.3rem;
            color: #2c3e50;
            margin-bottom: 0.5rem;
            display: inline-block;
        }

        .fbcw-step-content {
            background: #f8f9fa;
            padding: 1.5rem;
            border-radius: 8px;
            border-left: 4px solid #3498db;
            margin-top: 1rem;
        }

        .fbcw-code-block {
            background: #2c3e50;
            color: #ecf0f1;
            padding: 1rem;
            border-radius: 5px;
            font-family: 'Courier New', monospace;
            margin: 1rem 0;
            overflow-x: auto;
        }

        .fbcw-warning-box {
            background: #fff3cd;
            border: 1px solid #ffeaa7;
            border-radius: 5px;
            padding: 1rem;
            margin: 1rem 0;
            border-left: 4px solid #f39c12;
        }

        .fbcw-warning-title {
            font-weight: bold;
            color: #856404;
            margin-bottom: 0.5rem;
        }

        .fbcw-feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin: 2rem 0;
        }

        .fbcw-feature-card {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 3px 10px rgba(0,0,0,0.1);
            transition: transform 0.3s ease;
        }

        .fbcw-feature-card:hover {
            transform: translateY(-5px);
        }

        .fbcw-feature-icon {
            font-size: 3rem;
            margin-bottom: 1rem;
            color: #3498db;
        }

        .fbcw-feature-title {
            font-size: 1.3rem;
            margin-bottom: 1rem;
            color: #2c3e50;
        }

        .fbcw-cta-section {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 4rem 0;
            text-align: center;
        }

        .fbcw-cta-title {
            font-size: 2.5rem;
            margin-bottom: 1rem;
        }

        .fbcw-cta-subtitle {
            font-size: 1.2rem;
            margin-bottom: 2rem;
            opacity: 0.9;
        }

        .fbcw-btn-primary {
            background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
            color: white;
            padding: 1rem 2rem;
            border: none;
            border-radius: 50px;
            font-size: 1.1rem;
            cursor: pointer;
            text-decoration: none;
            display: inline-block;
            transition: transform 0.3s ease;
            box-shadow: 0 4px 15px rgba(0,0,0,0.2);
        }

        .fbcw-btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0,0,0,0.3);
        }

        .fbcw-footer {
            background: #2c3e50;
            color: white;
            padding: 3rem 0 1rem;
        }

        .fbcw-footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }

        .fbcw-footer-section h3 {
            margin-bottom: 1rem;
            color: #3498db;
        }

        .fbcw-footer-section ul {
            list-style: none;
        }

        .fbcw-footer-section ul li {
            margin-bottom: 0.5rem;
        }

        .fbcw-footer-section ul li a {
            color: #bdc3c7;
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .fbcw-footer-section ul li a:hover {
            color: #3498db;
        }

        .fbcw-footer-bottom {
            border-top: 1px solid #34495e;
            padding-top: 1rem;
            text-align: center;
            color: #bdc3c7;
        }

        @media (max-width: 768px) {
            .fbcw-hero-title {
                font-size: 2rem;
            }

            .fbcw-nav-menu {
                gap: 1rem;
            }

            .fbcw-tutorial-section {
                padding: 2rem 1rem;
            }

            .fbcw-section-title {
                font-size: 1.5rem;
            }
        }