:root {
            --i0yps4-primary: #005bb7;
            --i0yps4-secondary: #0078d4;
            --i0yps4-accent: #f3f9ff;
            --i0yps4-text: #2c3e50;
            --i0yps4-text-light: #5a6c7d;
            --i0yps4-bg: #ffffff;
            --i0yps4-bg-alt: #f8fafd;
            --i0yps4-border: #e1e8ed;
            --i0yps4-shadow: 0 10px 30px rgba(0, 91, 183, 0.08);
            --i0yps4-container-width: 1100px;
        }

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

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

        /* 导航栏设计 */
        .i0yps4-nav-wrapper {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--i0yps4-border);
            padding: 12px 0;
        }

        .i0yps4-nav-container {
            max-width: var(--i0yps4-container-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }

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

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

        .i0yps4-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 8px;
            min-width: 0;
        }

        .i0yps4-menu li a {
            text-decoration: none;
            color: var(--i0yps4-text-light);
            padding: 8px 14px;
            font-size: 0.95rem;
            font-weight: 500;
            border-radius: 6px;
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .i0yps4-menu li a:hover {
            color: var(--i0yps4-primary);
            background: var(--i0yps4-accent);
        }

        .i0yps4-menu li a.active {
            color: var(--i0yps4-primary);
            background: var(--i0yps4-accent);
            box-shadow: inset 0 0 0 1px rgba(0, 91, 183, 0.1);
        }

        /* Hero 区域：中心垂直结构 */
        .i0yps4-hero {
            padding: 96px 24px;
            background: radial-gradient(circle at 50% 0%, #f0f7ff 0%, #ffffff 70%);
            text-align: center;
            overflow: hidden;
        }

        .i0yps4-hero-inner {
            max-width: 800px;
            margin: 0 auto;
        }

        .i0yps4-badge {
            display: inline-block;
            padding: 6px 16px;
            background: var(--i0yps4-accent);
            color: var(--i0yps4-primary);
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 700;
            margin-bottom: 24px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .i0yps4-hero h1 {
            font-size: clamp(2rem, 5vw, 3.5rem);
            line-height: 1.2;
            color: #1a2a3a;
            margin-bottom: 24px;
            word-break: break-word;
        }

        .i0yps4-hero p {
            font-size: clamp(1.1rem, 2vw, 1.3rem);
            color: var(--i0yps4-text-light);
            margin-bottom: 48px;
            max-width: 650px;
            margin-left: auto;
            margin-right: auto;
        }

        /* 模拟自动合并视觉效果 */
        .i0yps4-visual-preview {
            max-width: var(--i0yps4-container-width);
            margin: 0 auto;
            background: #fff;
            border-radius: 16px;
            box-shadow: 0 20px 50px rgba(0,0,0,0.1);
            border: 1px solid var(--i0yps4-border);
            padding: 16px;
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        .i0yps4-code-mockup {
            flex: 1;
            min-width: 300px;
            background: #fdfdfd;
            border-radius: 8px;
            padding: 20px;
            text-align: left;
            font-family: "Cascadia Code", Consolas, monospace;
            font-size: 13px;
            border: 1px solid #eee;
        }

        .i0yps4-line-added { background: #e6ffed; border-left: 3px solid #28a745; margin-left: -20px; padding-left: 17px; }
        .i0yps4-line-removed { background: #ffeef0; border-left: 3px solid #d73a49; margin-left: -20px; padding-left: 17px; }
        .i0yps4-line-merge { background: #f1f8ff; border-left: 3px solid #0366d6; margin-left: -20px; padding-left: 17px; }

        /* 内容板块 */
        .i0yps4-section {
            padding: 96px 24px;
            max-width: var(--i0yps4-container-width);
            margin: 0 auto;
        }

        .i0yps4-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
            margin-top: 48px;
        }

        .i0yps4-card {
            background: var(--i0yps4-bg);
            padding: 40px;
            border-radius: 16px;
            border: 1px solid var(--i0yps4-border);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .i0yps4-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--i0yps4-shadow);
            border-color: var(--i0yps4-primary);
        }

        .i0yps4-card h3 {
            font-size: 1.5rem;
            margin-bottom: 16px;
            color: var(--i0yps4-primary);
        }

        /* 侧边图文混排 */
        .i0yps4-feature-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
            margin-bottom: 96px;
        }

        .i0yps4-feature-row:nth-child(even) {
            flex-direction: row-reverse;
        }

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

        .i0yps4-feature-text h2 {
            font-size: 2.2rem;
            margin-bottom: 24px;
            line-height: 1.3;
        }

        .i0yps4-feature-image {
            flex: 1;
            min-width: 300px;
            background: var(--i0yps4-bg-alt);
            border-radius: 24px;
            padding: 40px;
            border: 1px dashed var(--i0yps4-primary);
            text-align: center;
        }

        /* 步骤条 */
        .i0yps4-steps {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            counter-reset: step;
        }

        .i0yps4-step-item {
            flex: 1;
            min-width: 240px;
            background: var(--i0yps4-bg-alt);
            padding: 32px;
            border-radius: 12px;
            position: relative;
        }

        .i0yps4-step-item::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -15px;
            left: 20px;
            width: 40px;
            height: 40px;
            background: var(--i0yps4-primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
        }

        /* 页脚 */
        .i0yps4-footer {
            background: #1a2a3a;
            color: #fff;
            padding: 64px 24px;
            margin-top: 96px;
        }

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

        .i0yps4-footer-brand h2 {
            font-size: 1.8rem;
            margin-bottom: 16px;
        }

        .i0yps4-footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
        }

        .i0yps4-footer-column h4 {
            margin-bottom: 20px;
            color: #8bb9e6;
        }

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

        .i0yps4-footer-column ul li {
            margin-bottom: 10px;
        }

        .i0yps4-footer-column ul li a {
            color: #cbd5e0;
            text-decoration: none;
            transition: color 0.3s;
        }

        .i0yps4-footer-column ul li a:hover {
            color: #fff;
        }

        .i0yps4-bottom-bar {
            max-width: var(--i0yps4-container-width);
            margin: 48px auto 0;
            padding-top: 24px;
            border-top: 1px solid rgba(255,255,255,0.1);
            text-align: center;
            font-size: 0.9rem;
            color: #a0aec0;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .i0yps4-nav-container {
                flex-direction: column;
                gap: 16px;
            }
            .i0yps4-menu {
                justify-content: center;
            }
            .i0yps4-hero {
                padding: 64px 20px;
            }
            .i0yps4-feature-row {
                gap: 32px;
                margin-bottom: 64px;
            }
        }