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

        html, body {
            height: 100%;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
        }

        /* 导航栏样式 */
        .vjh3-navbar {
            background: linear-gradient(135deg, #0088cc 0%, #0066aa 100%);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .vjh3-navbar-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }

        .vjh3-logo-wrapper {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            color: white;
            font-weight: bold;
            font-size: 20px;
        }

        .vjh3-logo-wrapper img {
            height: 40px;
            width: auto;
        }

        .vjh3-nav-menu {
            display: flex;
            gap: 30px;
            align-items: center;
        }

        .vjh3-nav-link {
            color: white;
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
            transition: opacity 0.3s ease, text-shadow 0.3s ease;
            position: relative;
        }

        .vjh3-nav-link:hover {
            opacity: 0.8;
            text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
        }

        .vjh3-nav-link::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background-color: white;
            transition: width 0.3s ease;
        }

        .vjh3-nav-link:hover::after {
            width: 100%;
        }

        /* 主容器 */
        .vjh3-main-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 英雄区域 */
        .vjh3-hero-section {
            background: linear-gradient(135deg, #0088cc 0%, #00a8e8 100%);
            color: white;
            padding: 60px 20px;
            text-align: center;
            border-radius: 10px;
            margin: 40px 0;
            box-shadow: 0 8px 20px rgba(0, 136, 204, 0.3);
        }

        .vjh3-hero-title {
            font-size: 42px;
            font-weight: 700;
            margin-bottom: 20px;
            line-height: 1.2;
        }

        .vjh3-hero-subtitle {
            font-size: 18px;
            margin-bottom: 30px;
            opacity: 0.95;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        /* 内容区域 */
        .vjh3-content-wrapper {
            background: white;
            padding: 40px;
            border-radius: 10px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            margin-bottom: 40px;
        }

        .vjh3-main-heading {
            font-size: 36px;
            color: #0088cc;
            margin-bottom: 30px;
            font-weight: 700;
        }

        .vjh3-section-title {
            font-size: 24px;
            color: #0088cc;
            margin-top: 35px;
            margin-bottom: 20px;
            font-weight: 600;
            border-left: 4px solid #0088cc;
            padding-left: 15px;
        }

        .vjh3-section-description {
            font-size: 16px;
            color: #555;
            margin-bottom: 15px;
            line-height: 1.8;
        }

        /* 步骤列表 */
        .vjh3-steps-list {
            list-style: none;
            margin: 20px 0;
        }

        .vjh3-step-item {
            background: #f8f9fa;
            padding: 20px;
            margin-bottom: 15px;
            border-radius: 8px;
            border-left: 4px solid #0088cc;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .vjh3-step-item:hover {
            transform: translateX(5px);
            box-shadow: 0 4px 12px rgba(0, 136, 204, 0.2);
        }

        .vjh3-step-number {
            display: inline-block;
            background: #0088cc;
            color: white;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            text-align: center;
            line-height: 32px;
            font-weight: bold;
            margin-right: 12px;
            font-size: 16px;
        }

        .vjh3-step-title {
            font-size: 18px;
            font-weight: 600;
            color: #333;
            margin-bottom: 8px;
        }

        .vjh3-step-description {
            font-size: 14px;
            color: #666;
            line-height: 1.6;
        }

        /* 提示框 */
        .vjh3-tip-box {
            background: #e3f2fd;
            border-left: 4px solid #0088cc;
            padding: 20px;
            margin: 20px 0;
            border-radius: 6px;
        }

        .vjh3-tip-title {
            font-weight: 600;
            color: #0088cc;
            margin-bottom: 8px;
            font-size: 16px;
        }

        .vjh3-tip-text {
            color: #555;
            font-size: 14px;
            line-height: 1.6;
        }

        /* 功能卡片 */
        .vjh3-features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin: 30px 0;
        }

        .vjh3-feature-card {
            background: #f8f9fa;
            padding: 25px;
            border-radius: 10px;
            text-align: center;
            transition: all 0.3s ease;
            border: 2px solid transparent;
        }

        .vjh3-feature-card:hover {
            background: white;
            border-color: #0088cc;
            box-shadow: 0 8px 20px rgba(0, 136, 204, 0.15);
            transform: translateY(-5px);
        }

        .vjh3-feature-icon {
            font-size: 40px;
            margin-bottom: 15px;
        }

        .vjh3-feature-title {
            font-size: 18px;
            font-weight: 600;
            color: #333;
            margin-bottom: 10px;
        }

        .vjh3-feature-desc {
            font-size: 14px;
            color: #666;
            line-height: 1.6;
        }

        /* CTA 按钮区域 */
        .vjh3-cta-section {
            background: linear-gradient(135deg, #0088cc 0%, #00a8e8 100%);
            color: white;
            padding: 50px 40px;
            border-radius: 10px;
            text-align: center;
            margin: 40px 0;
            box-shadow: 0 8px 20px rgba(0, 136, 204, 0.3);
        }

        .vjh3-cta-title {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 15px;
        }

        .vjh3-cta-text {
            font-size: 16px;
            margin-bottom: 30px;
            opacity: 0.95;
        }

        .vjh3-cta-buttons {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .vjh3-btn {
            padding: 14px 32px;
            font-size: 16px;
            font-weight: 600;
            border: none;
            border-radius: 6px;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
        }

        .vjh3-btn-primary {
            background: white;
            color: #0088cc;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
        }

        .vjh3-btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
        }

        .vjh3-btn-secondary {
            background: transparent;
            color: white;
            border: 2px solid white;
        }

        .vjh3-btn-secondary:hover {
            background: white;
            color: #0088cc;
        }

        /* 常见问题 */
        .vjh3-faq-container {
            margin: 40px 0;
        }

        .vjh3-faq-item {
            background: white;
            margin-bottom: 15px;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
        }

        .vjh3-faq-question {
            background: #f8f9fa;
            padding: 20px;
            cursor: pointer;
            font-weight: 600;
            color: #333;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: background 0.3s ease;
            font-size: 16px;
        }

        .vjh3-faq-question:hover {
            background: #e8eaed;
        }

        .vjh3-faq-arrow {
            font-size: 18px;
            transition: transform 0.3s ease;
        }

        .vjh3-faq-answer {
            padding: 20px;
            color: #666;
            line-height: 1.8;
            display: none;
            background: white;
        }

        .vjh3-faq-answer.active {
            display: block;
        }

        .vjh3-faq-arrow.active {
            transform: rotate(180deg);
        }

        /* 页脚 */
        .vjh3-footer {
            background: #2c3e50;
            color: #ecf0f1;
            padding: 40px 20px 20px;
            margin-top: 60px;
        }

        .vjh3-footer-container {
            max-width: 1200px;
            margin: 0 auto;
        }

        .vjh3-footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }

        .vjh3-footer-section-title {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 15px;
            color: white;
        }

        .vjh3-footer-link {
            display: block;
            color: #bdc3c7;
            text-decoration: none;
            margin-bottom: 10px;
            font-size: 14px;
            transition: color 0.3s ease;
        }

        .vjh3-footer-link:hover {
            color: white;
        }

        .vjh3-footer-bottom {
            border-top: 1px solid #34495e;
            padding-top: 20px;
            text-align: center;
            color: #95a5a6;
            font-size: 14px;
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .vjh3-navbar-container {
                height: 60px;
            }

            .vjh3-logo-wrapper {
                font-size: 16px;
            }

            .vjh3-nav-menu {
                gap: 15px;
            }

            .vjh3-nav-link {
                font-size: 12px;
            }

            .vjh3-hero-title {
                font-size: 28px;
            }

            .vjh3-hero-subtitle {
                font-size: 16px;
            }

            .vjh3-main-heading {
                font-size: 28px;
            }

            .vjh3-section-title {
                font-size: 20px;
            }

            .vjh3-content-wrapper {
                padding: 25px;
            }

            .vjh3-cta-section {
                padding: 30px 20px;
            }

            .vjh3-cta-title {
                font-size: 22px;
            }

            .vjh3-cta-buttons {
                flex-direction: column;
            }

            .vjh3-btn {
                width: 100%;
            }

            .vjh3-features-grid {
                grid-template-columns: 1fr;
            }

            .vjh3-footer-content {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 480px) {
            .vjh3-navbar-container {
                padding: 0 10px;
            }

            .vjh3-nav-menu {
                gap: 10px;
                flex-wrap: wrap;
            }

            .vjh3-nav-link {
                font-size: 11px;
            }

            .vjh3-hero-title {
                font-size: 22px;
            }

            .vjh3-hero-subtitle {
                font-size: 14px;
            }

            .vjh3-hero-section {
                padding: 30px 15px;
                margin: 20px 0;
            }

            .vjh3-main-heading {
                font-size: 22px;
            }

            .vjh3-section-title {
                font-size: 18px;
            }

            .vjh3-content-wrapper {
                padding: 15px;
                margin-bottom: 20px;
            }

            .vjh3-step-item {
                padding: 15px;
            }

            .vjh3-step-title {
                font-size: 16px;
            }

            .vjh3-cta-section {
                padding: 20px 15px;
            }

            .vjh3-cta-title {
                font-size: 18px;
            }

            .vjh3-cta-text {
                font-size: 14px;
            }

            .vjh3-footer-content {
                grid-template-columns: 1fr;
            }
        }

        /* 动画 */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .vjh3-content-wrapper {
            animation: fadeInUp 0.6s ease-out;
        }

        /* 图片样式 */
        .vjh3-tutorial-image {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            margin: 20px 0;
        }

        /* 代码块 */
        .vjh3-code-block {
            background: #2c3e50;
            color: #ecf0f1;
            padding: 15px;
            border-radius: 6px;
            overflow-x: auto;
            font-family: 'Courier New', monospace;
            font-size: 13px;
            line-height: 1.5;
            margin: 15px 0;
        }