* {
            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;
        }

        .l8uo-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .l8uo-header {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .l8uo-nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }

        .l8uo-logo img {
            height: 40px;
            width: auto;
        }

        .l8uo-nav-menu {
            display: flex;
            gap: 30px;
            align-items: center;
        }

        .l8uo-nav-link {
            color: white;
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s ease;
            padding: 8px 16px;
            border-radius: 20px;
        }

        .l8uo-nav-link:hover {
            background-color: rgba(255,255,255,0.2);
            transform: translateY(-2px);
        }

        .l8uo-hero {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 80px 0;
            text-align: center;
        }

        .l8uo-hero-title {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 20px;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }

        .l8uo-hero-subtitle {
            font-size: 1.3rem;
            margin-bottom: 30px;
            opacity: 0.9;
        }

        .l8uo-hero-cta {
            background: #ff6b6b;
            color: white;
            padding: 15px 40px;
            border: none;
            border-radius: 50px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
        }

        .l8uo-hero-cta:hover {
            background: #ff5252;
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(255,107,107,0.4);
        }

        .l8uo-main {
            padding: 60px 0;
        }

        .l8uo-content-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 40px;
            margin-bottom: 60px;
        }

        .l8uo-tutorial-content {
            background: white;
            padding: 40px;
            border-radius: 15px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.1);
        }

        .l8uo-sidebar {
            background: white;
            padding: 30px;
            border-radius: 15px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.1);
            height: fit-content;
            position: sticky;
            top: 100px;
        }

        .l8uo-section-title {
            font-size: 2rem;
            color: #333;
            margin-bottom: 25px;
            padding-bottom: 10px;
            border-bottom: 3px solid #667eea;
        }

        .l8uo-step-card {
            background: #f8f9fa;
            padding: 25px;
            margin-bottom: 25px;
            border-radius: 10px;
            border-left: 5px solid #667eea;
            transition: all 0.3s ease;
        }

        .l8uo-step-card:hover {
            transform: translateX(5px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }

        .l8uo-step-number {
            background: #667eea;
            color: white;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            margin-right: 15px;
        }

        .l8uo-step-title {
            font-size: 1.3rem;
            font-weight: 600;
            color: #333;
            margin-bottom: 10px;
        }

        .l8uo-step-content {
            color: #666;
            line-height: 1.7;
        }

        .l8uo-feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin: 40px 0;
        }

        .l8uo-feature-card {
            background: white;
            padding: 30px;
            border-radius: 15px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.1);
            text-align: center;
            transition: all 0.3s ease;
        }

        .l8uo-feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 35px rgba(0,0,0,0.15);
        }

        .l8uo-feature-icon {
            font-size: 3rem;
            margin-bottom: 20px;
            color: #667eea;
        }

        .l8uo-feature-title {
            font-size: 1.4rem;
            font-weight: 600;
            margin-bottom: 15px;
            color: #333;
        }

        .l8uo-feature-desc {
            color: #666;
            line-height: 1.6;
        }

        .l8uo-toc {
            background: #f8f9fa;
            padding: 20px;
            border-radius: 10px;
            margin-bottom: 30px;
        }

        .l8uo-toc-title {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 15px;
            color: #333;
        }

        .l8uo-toc-list {
            list-style: none;
        }

        .l8uo-toc-item {
            margin-bottom: 8px;
        }

        .l8uo-toc-link {
            color: #667eea;
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .l8uo-toc-link:hover {
            color: #5a67d8;
            text-decoration: underline;
        }

        .l8uo-cta-section {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 60px 0;
            text-align: center;
            margin: 60px 0;
            border-radius: 20px;
        }

        .l8uo-cta-title {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .l8uo-cta-desc {
            font-size: 1.2rem;
            margin-bottom: 30px;
            opacity: 0.9;
        }

        .l8uo-cta-button {
            background: #ff6b6b;
            color: white;
            padding: 18px 45px;
            border: none;
            border-radius: 50px;
            font-size: 1.2rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
            margin: 0 10px;
        }

        .l8uo-cta-button:hover {
            background: #ff5252;
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(255,107,107,0.4);
        }

        .l8uo-cta-button-secondary {
            background: transparent;
            border: 2px solid white;
        }

        .l8uo-cta-button-secondary:hover {
            background: white;
            color: #667eea;
        }

        .l8uo-footer {
            background: #2d3748;
            color: white;
            padding: 40px 0;
            text-align: center;
        }

        .l8uo-footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }

        .l8uo-footer-section h3 {
            margin-bottom: 15px;
            color: #667eea;
        }

        .l8uo-footer-section p,
        .l8uo-footer-section a {
            color: #a0aec0;
            text-decoration: none;
            line-height: 1.8;
        }

        .l8uo-footer-section a:hover {
            color: white;
        }

        .l8uo-footer-bottom {
            border-top: 1px solid #4a5568;
            padding-top: 20px;
            color: #a0aec0;
        }

        @media (max-width: 768px) {
            .l8uo-nav-menu {
                flex-direction: column;
                gap: 15px;
            }

            .l8uo-hero-title {
                font-size: 2.5rem;
            }

            .l8uo-content-grid {
                grid-template-columns: 1fr;
            }

            .l8uo-feature-grid {
                grid-template-columns: 1fr;
            }

            .l8uo-cta-title {
                font-size: 2rem;
            }

            .l8uo-tutorial-content,
            .l8uo-sidebar {
                padding: 20px;
            }
        }

        .l8uo-highlight {
            background: linear-gradient(120deg, #a8edea 0%, #fed6e3 100%);
            padding: 2px 6px;
            border-radius: 4px;
            font-weight: 600;
        }

        .l8uo-tip-box {
            background: #e6fffa;
            border-left: 4px solid #38b2ac;
            padding: 15px 20px;
            margin: 20px 0;
            border-radius: 5px;
        }

        .l8uo-warning-box {
            background: #fffbeb;
            border-left: 4px solid #f6ad55;
            padding: 15px 20px;
            margin: 20px 0;
            border-radius: 5px;
        }