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

        html, body {
            width: 100%;
            height: 100%;
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
            color: #333;
            line-height: 1.6;
        }

        /* 导航栏样式 */
        .yewq9-navbar-wrapper {
            width: 100%;
            background: #fff;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .yewq9-navbar-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }

        .yewq9-logo-section {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 18px;
            color: #0066cc;
            text-decoration: none;
        }

        .yewq9-logo-section img {
            height: 40px;
            width: auto;
        }

        .yewq9-nav-menu {
            display: flex;
            gap: 30px;
            align-items: center;
        }

        .yewq9-nav-link {
            color: #333;
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
            transition: color 0.3s ease;
            position: relative;
        }

        .yewq9-nav-link:hover {
            color: #0066cc;
        }

        .yewq9-nav-link::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background: #0066cc;
            transition: width 0.3s ease;
        }

        .yewq9-nav-link:hover::after {
            width: 100%;
        }

        /* 响应式导航 */
        @media (max-width: 768px) {
            .yewq9-nav-menu {
                gap: 15px;
            }

            .yewq9-nav-link {
                font-size: 12px;
            }
        }

        /* 英雄区域 */
        .yewq9-hero-section {
            background: linear-gradient(135deg, #0066cc 0%, #003d99 100%);
            color: #fff;
            padding: 100px 20px;
            text-align: center;
            min-height: 600px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
        }

        .yewq9-hero-content {
            max-width: 800px;
            margin: 0 auto;
        }

        .yewq9-hero-title {
            font-size: 48px;
            font-weight: 700;
            margin-bottom: 20px;
            line-height: 1.2;
        }

        .yewq9-hero-subtitle {
            font-size: 20px;
            margin-bottom: 40px;
            opacity: 0.95;
            line-height: 1.6;
        }

        .yewq9-cta-button-primary {
            display: inline-block;
            background: #fff;
            color: #0066cc;
            padding: 15px 40px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 16px;
            text-decoration: none;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
            margin-right: 15px;
            margin-bottom: 15px;
            cursor: pointer;
            border: none;
        }

        .yewq9-cta-button-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
        }

        .yewq9-cta-button-secondary {
            display: inline-block;
            background: transparent;
            color: #fff;
            padding: 15px 40px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 16px;
            text-decoration: none;
            border: 2px solid #fff;
            transition: all 0.3s ease;
            margin-bottom: 15px;
            cursor: pointer;
        }

        .yewq9-cta-button-secondary:hover {
            background: #fff;
            color: #0066cc;
            transform: translateY(-3px);
        }

        @media (max-width: 768px) {
            .yewq9-hero-title {
                font-size: 32px;
            }

            .yewq9-hero-subtitle {
                font-size: 16px;
            }

            .yewq9-cta-button-primary,
            .yewq9-cta-button-secondary {
                display: block;
                margin: 10px auto;
            }
        }

        /* 主内容区 */
        .yewq9-main-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 80px 20px;
        }

        .yewq9-section-title {
            font-size: 36px;
            font-weight: 700;
            color: #333;
            margin-bottom: 40px;
            text-align: center;
        }

        .yewq9-section-subtitle {
            font-size: 18px;
            color: #666;
            text-align: center;
            margin-bottom: 50px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        /* 特性卡片 */
        .yewq9-features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
            margin-bottom: 80px;
        }

        .yewq9-feature-card {
            background: #f8f9fa;
            padding: 40px;
            border-radius: 12px;
            text-align: center;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border: 1px solid #e9ecef;
        }

        .yewq9-feature-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 30px rgba(0, 102, 204, 0.15);
            border-color: #0066cc;
        }

        .yewq9-feature-icon {
            font-size: 48px;
            margin-bottom: 20px;
            height: 70px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #0066cc 0%, #003d99 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .yewq9-feature-title {
            font-size: 20px;
            font-weight: 600;
            color: #333;
            margin-bottom: 15px;
        }

        .yewq9-feature-desc {
            font-size: 14px;
            color: #666;
            line-height: 1.8;
        }

        /* 下载区域 */
        .yewq9-download-section {
            background: linear-gradient(135deg, #f0f4ff 0%, #e8f0ff 100%);
            padding: 80px 20px;
            margin-bottom: 80px;
            border-radius: 12px;
        }

        .yewq9-download-container {
            max-width: 1200px;
            margin: 0 auto;
            text-align: center;
        }

        .yewq9-download-title {
            font-size: 32px;
            font-weight: 700;
            color: #333;
            margin-bottom: 30px;
        }

        .yewq9-platform-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 20px;
            margin-top: 40px;
        }

        .yewq9-platform-item {
            background: #fff;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
            transition: all 0.3s ease;
            cursor: pointer;
            border: 2px solid transparent;
        }

        .yewq9-platform-item:hover {
            border-color: #0066cc;
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(0, 102, 204, 0.2);
        }

        .yewq9-platform-icon {
            font-size: 36px;
            margin-bottom: 15px;
        }

        .yewq9-platform-name {
            font-weight: 600;
            color: #333;
            font-size: 14px;
        }

        /* 关于Signal部分 */
        .yewq9-about-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
            margin-bottom: 80px;
        }

        .yewq9-about-text h2 {
            font-size: 28px;
            font-weight: 700;
            color: #333;
            margin-bottom: 20px;
        }

        .yewq9-about-text p {
            font-size: 16px;
            color: #666;
            margin-bottom: 15px;
            line-height: 1.8;
        }

        .yewq9-about-features-list {
            margin-top: 30px;
        }

        .yewq9-about-features-item {
            display: flex;
            align-items: center;
            margin-bottom: 15px;
            font-size: 15px;
            color: #333;
        }

        .yewq9-about-features-item::before {
            content: '✓';
            display: inline-block;
            width: 24px;
            height: 24px;
            background: #0066cc;
            color: #fff;
            border-radius: 50%;
            text-align: center;
            line-height: 24px;
            font-weight: bold;
            margin-right: 15px;
            flex-shrink: 0;
        }

        .yewq9-about-image {
            background: linear-gradient(135deg, #0066cc 0%, #003d99 100%);
            border-radius: 12px;
            min-height: 400px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            font-weight: 600;
        }

        @media (max-width: 768px) {
            .yewq9-about-section {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .yewq9-about-image {
                min-height: 300px;
            }
        }

        /* 页脚 */
        .yewq9-footer-wrapper {
            background: #1a1a1a;
            color: #fff;
            padding: 60px 20px 30px;
            margin-top: 100px;
        }

        .yewq9-footer-container {
            max-width: 1200px;
            margin: 0 auto;
        }

        .yewq9-footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .yewq9-footer-section h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 20px;
            color: #fff;
        }

        .yewq9-footer-link {
            display: block;
            color: #999;
            text-decoration: none;
            font-size: 14px;
            margin-bottom: 10px;
            transition: color 0.3s ease;
        }

        .yewq9-footer-link:hover {
            color: #0066cc;
        }

        .yewq9-footer-bottom {
            border-top: 1px solid #333;
            padding-top: 30px;
            text-align: center;
            color: #666;
            font-size: 14px;
        }

        .yewq9-footer-bottom p {
            margin-bottom: 10px;
        }

        /* 其他通用样式 */
        .yewq9-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .yewq9-text-center {
            text-align: center;
        }

        .yewq9-mt-40 {
            margin-top: 40px;
        }

        .yewq9-mb-40 {
            margin-bottom: 40px;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .yewq9-section-title {
                font-size: 24px;
            }

            .yewq9-features-grid {
                grid-template-columns: 1fr;
            }

            .yewq9-platform-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .yewq9-footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
        }