:root {
            --i0yps4-primary: #005a9e;
            --i0yps4-secondary: #ff8c00;
            --i0yps4-accent: #0078d4;
            --i0yps4-bg: #f8f9fb;
            --i0yps4-card-bg: #ffffff;
            --i0yps4-text-main: #202124;
            --i0yps4-text-muted: #5f6368;
            --i0yps4-border: rgba(0, 0, 0, 0.08);
            --i0yps4-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--i0yps4-bg);
            color: var(--i0yps4-text-main);
            line-height: 1.7;
            overflow-x: hidden;
            word-break: break-word;
        }

        /* 导航栏 */
        .i0yps4-navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 72px;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--i0yps4-border);
            z-index: 1000;
            display: flex;
            align-items: center;
            padding: 0 5%;
        }

        .i0yps4-nav-container {
            width: 100%;
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }

        .i0yps4-logo {
            min-width: 0;
            flex-shrink: 0;
        }

        .i0yps4-logo img {
            height: 40px;
            display: block;
        }

        .i0yps4-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 24px;
            min-width: 0;
        }

        .i0yps4-menu-item a {
            text-decoration: none;
            color: var(--i0yps4-text-muted);
            font-size: 15px;
            font-weight: 500;
            transition: color 0.3s;
            white-space: nowrap;
        }

        .i0yps4-menu-item a:hover, 
        .i0yps4-menu-item a.active {
            color: var(--i0yps4-primary);
        }

        /* Hero 区域 - 独特对角线分割布局 */
        .i0yps4-hero {
            padding: 160px 5% 100px;
            background: linear-gradient(135deg, #ffffff 0%, #eef5ff 100%);
            position: relative;
            overflow: hidden;
        }

        .i0yps4-hero::after {
            content: '';
            position: absolute;
            bottom: -50px;
            right: -50px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(0,90,158,0.05) 0%, transparent 70%);
            border-radius: 50%;
        }

        .i0yps4-hero-content {
            max-width: 1100px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
        }

        .i0yps4-hero-text {
            flex: 1;
            min-width: 320px;
        }

        .i0yps4-hero-title {
            font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
            line-height: 1.2;
            font-weight: 800;
            color: #1a1a1a;
            margin-bottom: 24px;
            word-break: keep-all;
        }

        .i0yps4-hero-subtitle {
            font-size: clamp(1.1rem, 1vw + 0.8rem, 1.4rem);
            color: var(--i0yps4-text-muted);
            margin-bottom: 40px;
            max-width: 600px;
        }

        .i0yps4-hero-visual {
            flex: 1;
            min-width: 320px;
            display: flex;
            justify-content: center;
            position: relative;
        }

        .i0yps4-comparison-box {
            width: 100%;
            max-width: 500px;
            background: white;
            padding: 20px;
            border-radius: 20px;
            box-shadow: 0 20px 50px rgba(0,0,0,0.1);
            border: 1px solid var(--i0yps4-border);
        }

        /* 核心内容区 */
        .i0yps4-section {
            padding: 96px 5%;
            max-width: 1400px;
            margin: 0 auto;
        }

        .i0yps4-section-header {
            text-align: center;
            margin-bottom: 64px;
        }

        .i0yps4-section-title {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            margin-bottom: 16px;
            color: #1a1a1a;
        }

        /* 图文交替布局 */
        .i0yps4-feature-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
            margin-bottom: 80px;
        }

        .i0yps4-feature-row.reverse {
            flex-direction: row-reverse;
        }

        .i0yps4-feature-image {
            flex: 1;
            min-width: 300px;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--i0yps4-shadow);
        }

        .i0yps4-feature-image img {
            width: 100%;
            height: auto;
            display: block;
            transition: transform 0.5s;
        }

        .i0yps4-feature-image:hover img {
            transform: scale(1.05);
        }

        .i0yps4-feature-content {
            flex: 1;
            min-width: 300px;
        }

        .i0yps4-feature-tag {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(0, 90, 158, 0.1);
            color: var(--i0yps4-primary);
            border-radius: 4px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .i0yps4-feature-h3 {
            font-size: 1.8rem;
            margin-bottom: 20px;
        }

        .i0yps4-feature-list {
            list-style: none;
        }

        .i0yps4-feature-list li {
            margin-bottom: 12px;
            padding-left: 24px;
            position: relative;
        }

        .i0yps4-feature-list li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--i0yps4-secondary);
            font-weight: bold;
        }

        /* 动态内容区块 - 卡片网格 */
        .i0yps4-dynamic-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }

        .i0yps4-article-card {
            background: var(--i0yps4-card-bg);
            border-radius: 16px;
            padding: 32px;
            border: 1px solid var(--i0yps4-border);
            transition: all 0.3s;
            cursor: pointer;
        }

        .i0yps4-article-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.08);
            border-color: var(--i0yps4-primary);
        }

        .i0yps4-article-date {
            font-size: 14px;
            color: var(--i0yps4-text-muted);
            margin-bottom: 12px;
        }

        .i0yps4-article-title {
            font-size: 1.3rem;
            margin-bottom: 16px;
            color: var(--i0yps4-primary);
        }

        /* 页脚 */
        .i0yps4-footer {
            background: #1a1a1a;
            color: #ffffff;
            padding: 80px 5% 40px;
        }

        .i0yps4-footer-container {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
        }

        .i0yps4-footer-brand {
            flex: 1;
            min-width: 240px;
        }

        .i0yps4-footer-brand-name {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: 1px;
        }

        .i0yps4-footer-links {
            flex: 2;
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
            min-width: 300px;
        }

        .i0yps4-footer-group h4 {
            margin-bottom: 24px;
            font-size: 16px;
            color: var(--i0yps4-secondary);
        }

        .i0yps4-footer-group ul {
            list-style: none;
        }

        .i0yps4-footer-group li {
            margin-bottom: 12px;
        }

        .i0yps4-footer-group a {
            color: #ccc;
            text-decoration: none;
            font-size: 14px;
            transition: color 0.3s;
        }

        .i0yps4-footer-group a:hover {
            color: #fff;
        }

        .i0yps4-copyright {
            width: 100%;
            padding-top: 40px;
            margin-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            text-align: center;
            font-size: 14px;
            color: #888;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .i0yps4-navbar {
                height: auto;
                padding: 15px 5%;
            }
            .i0yps4-menu {
                display: none; /* 简化移动端显示，实际可加汉堡菜单 */
            }
            .i0yps4-hero {
                padding-top: 120px;
            }
            .i0yps4-feature-row {
                flex-direction: column !important;
                gap: 32px;
            }
            .i0yps4-hero-title {
                text-align: center;
            }
            .i0yps4-hero-subtitle {
                text-align: center;
                margin-left: auto;
                margin-right: auto;
            }
        }

        /* 结构化数据辅助 */
        .i0yps4-hidden {
            display: none;
        }