:root {
            --ysa473-primary: #FF7139;
            --ysa473-primary-dark: #E22D37;
            --ysa473-secondary: #002240;
            --ysa473-accent: #FFE900;
            --ysa473-bg: #FAFAFB;
            --ysa473-text: #15141A;
            --ysa473-text-muted: #5B5B66;
            --ysa473-white: #FFFFFF;
            --ysa473-container-width: 1100px;
            --ysa473-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            line-height: 1.6;
            color: var(--ysa473-text);
            background-color: var(--ysa473-bg);
            word-break: keep-all;
            overflow-x: hidden;
        }

        /* 布局基础 */
        .ysa473-container {
            max-width: var(--ysa473-container-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .ysa473-flex {
            display: flex;
            flex-wrap: wrap;
        }

        .ysa473-flex-item {
            min-width: 0;
        }

        /* 导航栏 */
        .ysa473-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            padding: 16px 0;
        }

        .ysa473-nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }

        .ysa473-logo {
            flex-shrink: 0;
        }

        .ysa473-logo img {
            height: 40px;
            width: auto;
            display: block;
        }

        .ysa473-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 16px;
        }

        .ysa473-nav-menu li a {
            text-decoration: none;
            color: var(--ysa473-text);
            font-weight: 500;
            font-size: 14px;
            padding: 8px 12px;
            border-radius: 6px;
            transition: var(--ysa473-transition);
            word-break: keep-all;
        }

        .ysa473-nav-menu li a:hover {
            color: var(--ysa473-primary);
            background: rgba(255, 113, 57, 0.05);
        }

        .ysa473-nav-menu li a.ysa473-active {
            color: var(--ysa473-primary);
            background: rgba(255, 113, 57, 0.1);
        }

        /* Hero 启动加速区 */
        .ysa473-hero {
            padding: 96px 0 64px;
            background: radial-gradient(circle at top right, #FFF5F2 0%, #FFFFFF 100%);
            text-align: center;
            overflow: hidden;
        }

        .ysa473-hero-content {
            max-width: 800px;
            margin: 0 auto;
        }

        .ysa473-hero-title {
            font-size: clamp(2rem, 5vw + 1rem, 4rem);
            line-height: 1.1;
            font-weight: 800;
            margin-bottom: 24px;
            color: var(--ysa473-secondary);
            word-break: keep-all;
        }

        .ysa473-hero-subtitle {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem);
            color: var(--ysa473-text-muted);
            margin-bottom: 40px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .ysa473-btn-group {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .ysa473-btn-primary {
            background: linear-gradient(135deg, var(--ysa473-primary) 0%, var(--ysa473-primary-dark) 100%);
            color: white;
            padding: 16px 32px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: bold;
            box-shadow: 0 10px 20px rgba(255, 113, 57, 0.3);
            transition: var(--ysa473-transition);
        }

        .ysa473-btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 30px rgba(255, 113, 57, 0.4);
        }

        /* 核心加速技术展示 - 网格布局 */
        .ysa473-tech-section {
            padding: 96px 0;
            background: var(--ysa473-white);
        }

        .ysa473-section-head {
            margin-bottom: 64px;
            text-align: center;
        }

        .ysa473-section-title {
            font-size: 2.5rem;
            margin-bottom: 16px;
        }

        .ysa473-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }

        .ysa473-card {
            background: var(--ysa473-bg);
            padding: 40px;
            border-radius: 24px;
            border: 1px solid rgba(0, 0, 0, 0.03);
            transition: var(--ysa473-transition);
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .ysa473-card:hover {
            transform: translateY(-8px);
            background: var(--ysa473-white);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.05);
            border-color: var(--ysa473-primary);
        }

        .ysa473-card-icon {
            font-size: 2.5rem;
            height: 64px;
            width: 64px;
            background: var(--ysa473-white);
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 16px;
            margin-bottom: 8px;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
        }

        .ysa473-card-title {
            font-size: 1.5rem;
            font-weight: 700;
        }

        .ysa473-card-text {
            color: var(--ysa473-text-muted);
            line-height: 1.7;
        }

        /* 交互对比区 */
        .ysa473-comparison {
            padding: 96px 0;
            background: var(--ysa473-secondary);
            color: var(--ysa473-white);
            border-radius: 0 0 100px 100px;
        }

        .ysa473-split-layout {
            display: flex;
            align-items: center;
            gap: 64px;
            flex-wrap: wrap;
        }

        .ysa473-split-text {
            flex: 1;
            min-width: 300px;
        }

        .ysa473-split-visual {
            flex: 1;
            min-width: 300px;
            background: rgba(255, 255, 255, 0.05);
            padding: 32px;
            border-radius: 32px;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .ysa473-stat-item {
            margin-bottom: 32px;
        }

        .ysa473-stat-bar {
            height: 12px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 6px;
            margin-top: 12px;
            position: relative;
            overflow: hidden;
        }

        .ysa473-stat-progress {
            position: absolute;
            left: 0;
            top: 0;
            height: 100%;
            background: var(--ysa473-primary);
            border-radius: 6px;
        }

        /* 动态内容区块 */
        .ysa473-news-section {
            padding: 96px 0;
        }

        .ysa473-news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 24px;
        }

        .ysa473-news-item {
            padding: 24px;
            border-bottom: 1px solid #EEE;
            transition: var(--ysa473-transition);
        }

        .ysa473-news-item:hover {
            border-color: var(--ysa473-primary);
        }

        .ysa473-tag {
            display: inline-block;
            padding: 4px 12px;
            background: #F0F0F0;
            border-radius: 4px;
            font-size: 12px;
            margin-bottom: 12px;
            color: var(--ysa473-primary);
            font-weight: bold;
        }

        /* 页脚 */
        .ysa473-footer {
            background: #15141A;
            color: #AAA;
            padding: 64px 0;
            margin-top: 64px;
        }

        .ysa473-footer-top {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 48px;
            margin-bottom: 48px;
        }

        .ysa473-footer-brand {
            max-width: 300px;
        }

        .ysa473-footer-brand h2 {
            color: var(--ysa473-white);
            margin-bottom: 16px;
        }

        .ysa473-footer-links {
            display: flex;
            gap: 64px;
            flex-wrap: wrap;
        }

        .ysa473-footer-column h4 {
            color: var(--ysa473-white);
            margin-bottom: 24px;
        }

        .ysa473-footer-column ul {
            list-style: none;
        }

        .ysa473-footer-column ul li {
            margin-bottom: 12px;
        }

        .ysa473-footer-column ul li a {
            color: #AAA;
            text-decoration: none;
            transition: var(--ysa473-transition);
        }

        .ysa473-footer-column ul li a:hover {
            color: var(--ysa473-primary);
        }

        .ysa473-footer-bottom {
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            text-align: center;
            font-size: 14px;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .ysa473-nav-menu {
                display: none; /* 简化处理，实际开发可加汉堡菜单 */
            }
            .ysa473-grid {
                grid-template-columns: 1fr;
            }
            .ysa473-hero {
                padding: 64px 0;
            }
            .ysa473-split-layout {
                flex-direction: column;
            }
        }

        /* 动画增强 */
        .ysa473-animate-up {
            transition: transform 0.6s ease-out;
        }
        .ysa473-animate-up:hover {
            transform: translateY(-10px);
        }