/* 变量定义 */
        :root {
            --i0yps4-primary-color: #005bb7;
            --i0yps4-secondary-color: #0078d4;
            --i0yps4-bg-light: #f8fafc;
            --i0yps4-text-main: #1e293b;
            --i0yps4-text-muted: #64748b;
            --i0yps4-accent: #ef4444;
            --i0yps4-container-width: 1100px;
            --i0yps4-radius: 12px;
            --i0yps4-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* 基础样式 */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: "Inter", "Microsoft YaHei", -apple-system, sans-serif;
            color: var(--i0yps4-text-main);
            background-color: var(--i0yps4-bg-light);
            line-height: 1.7;
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* 布局组件 */
        .i0yps4-container {
            max-width: var(--i0yps4-container-width);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* 导航栏 */
        .i0yps4-header {
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 15px rgba(0,0,0,0.05);
            padding: 12px 0;
        }

        .i0yps4-navbar {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
        }

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

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

        .i0yps4-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 16px;
            min-width: 0;
        }

        .i0yps4-nav-menu a {
            text-decoration: none;
            color: var(--i0yps4-text-main);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 12px;
            border-radius: 6px;
            transition: var(--i0yps4-transition);
        }

        .i0yps4-nav-menu a:hover {
            color: var(--i0yps4-primary-color);
            background: rgba(0, 91, 183, 0.05);
        }

        .i0yps4-nav-menu a.active {
            color: #fff;
            background: var(--i0yps4-primary-color);
        }

        /* Hero 区域 */
        .i0yps4-hero {
            padding: 96px 0 64px;
            background: linear-gradient(135deg, #e0eafc 0%, #cfdef3 100%);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .i0yps4-hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
            margin: 0 auto;
        }

        .i0yps4-hero-title {
            font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
            line-height: 1.2;
            color: #0f172a;
            margin-bottom: 24px;
            font-weight: 800;
            word-break: break-word;
        }

        .i0yps4-hero-subtitle {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem);
            color: var(--i0yps4-text-muted);
            margin-bottom: 32px;
            word-break: break-word;
        }

        /* 教程区块 */
        .i0yps4-section {
            padding: 80px 0;
            word-break: break-word;
        }

        .i0yps4-section-title {
            text-align: center;
            margin-bottom: 48px;
        }

        .i0yps4-section-title h2 {
            font-size: 2rem;
            margin-bottom: 16px;
            color: #0f172a;
        }

        .i0yps4-section-title p {
            color: var(--i0yps4-text-muted);
            max-width: 600px;
            margin: 0 auto;
        }

        /* 图文对比展示 */
        .i0yps4-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
            align-items: center;
        }

        .i0yps4-card {
            background: #fff;
            padding: 32px;
            border-radius: var(--i0yps4-radius);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            transition: var(--i0yps4-transition);
            min-width: 0;
        }

        .i0yps4-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
        }

        .i0yps4-step-num {
            display: inline-block;
            width: 40px;
            height: 40px;
            background: var(--i0yps4-primary-color);
            color: #fff;
            border-radius: 50%;
            text-align: center;
            line-height: 40px;
            font-weight: bold;
            margin-bottom: 20px;
        }

        .i0yps4-card h3 {
            margin-bottom: 16px;
            font-size: 1.25rem;
        }

        /* 功能点列表 */
        .i0yps4-feature-list {
            list-style: none;
            margin-top: 20px;
        }

        .i0yps4-feature-list li {
            padding: 8px 0 8px 28px;
            position: relative;
        }

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

        /* 图片比对视觉模拟区 */
        .i0yps4-visual-delta {
            background: #1e293b;
            border-radius: var(--i0yps4-radius);
            padding: 40px;
            color: #fff;
            margin-top: 48px;
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            justify-content: center;
        }

        .i0yps4-mock-img {
            flex: 1;
            min-width: 280px;
            height: 200px;
            background: #334155;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 2px dashed #475569;
            font-size: 0.9rem;
            color: #94a3b8;
        }

        .i0yps4-mock-diff {
            border: 2px solid var(--i0yps4-accent);
            background: rgba(239, 68, 68, 0.1);
            color: var(--i0yps4-accent);
        }

        /* 动态资讯区 */
        .i0yps4-news-section {
            background: #fff;
            padding: 64px 0;
        }

        /* 页脚 */
        .i0yps4-footer {
            background: #0f172a;
            color: #f8fafc;
            padding: 64px 0 32px;
        }

        .i0yps4-footer-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            margin-bottom: 48px;
        }

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

        .i0yps4-footer-brand {
            font-size: 1.5rem;
            font-weight: 800;
            margin-bottom: 20px;
            color: #fff;
        }

        .i0yps4-footer-links {
            list-style: none;
        }

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

        .i0yps4-footer-links a {
            color: #94a3b8;
            text-decoration: none;
            transition: var(--i0yps4-transition);
        }

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

        .i0yps4-copyright {
            border-top: 1px solid #334155;
            padding-top: 32px;
            text-align: center;
            color: #64748b;
            font-size: 0.875rem;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .i0yps4-navbar {
                flex-direction: column;
                gap: 16px;
            }
            .i0yps4-nav-menu {
                justify-content: center;
            }
            .i0yps4-hero {
                padding: 64px 0 48px;
            }
            .i0yps4-section {
                padding: 48px 0;
            }
        }