/* 变量与基础重置 */
        :root {
            --i0yps4-primary: #0066cc;
            --i0yps4-primary-dark: #004a99;
            --i0yps4-secondary: #f0f4f8;
            --i0yps4-text: #2c3e50;
            --i0yps4-text-light: #5a6c7d;
            --i0yps4-bg: #ffffff;
            --i0yps4-accent: #e74c3c;
            --i0yps4-success: #27ae60;
            --i0yps4-border: #dcdfe6;
            --i0yps4-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --i0yps4-radius: 12px;
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            line-height: 1.8;
            color: var(--i0yps4-text);
            background-color: var(--i0yps4-bg);
            word-break: keep-all;
            overflow-x: hidden;
        }

        /* 布局容器 */
        .i0yps4-container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* 导航栏 */
        .i0yps4-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--i0yps4-border);
            box-shadow: 0 2px 10px rgba(0,0,0,0.02);
        }

        .i0yps4-nav-wrapper {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            height: 72px;
            min-width: 0;
        }

        .i0yps4-logo {
            display: flex;
            align-items: center;
            min-width: 0;
        }

        .i0yps4-logo img {
            height: 40px;
            width: auto;
            object-fit: contain;
        }

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

        .i0yps4-menu-item a {
            text-decoration: none;
            color: var(--i0yps4-text);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 6px;
            transition: all 0.3s ease;
        }

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

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

        /* Hero 区块 - 独特非对称布局 */
        .i0yps4-hero {
            padding: 96px 0 64px;
            background: linear-gradient(135deg, #f8fbff 0%, #eef5ff 100%);
            position: relative;
            overflow: hidden;
        }

        .i0yps4-hero-grid {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
            min-width: 0;
        }

        .i0yps4-hero-content {
            flex: 1;
            min-width: 320px;
            word-break: break-word;
        }

        .i0yps4-hero-badge {
            display: inline-block;
            background: rgba(0, 102, 204, 0.1);
            color: var(--i0yps4-primary);
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: bold;
            margin-bottom: 24px;
        }

        .i0yps4-hero-title {
            font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
            line-height: 1.2;
            margin-bottom: 24px;
            color: #1a2a3a;
            font-weight: 800;
        }

        .i0yps4-hero-desc {
            font-size: clamp(1rem, 1vw + 0.8rem, 1.25rem);
            color: var(--i0yps4-text-light);
            margin-bottom: 32px;
            max-width: 600px;
        }

        /* 诊断卡片区 */
        .i0yps4-diagnostic {
            padding: 80px 0;
        }

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

        .i0yps4-section-head h2 {
            font-size: clamp(1.5rem, 3vw, 2.5rem);
            margin-bottom: 16px;
        }

        .i0yps4-grid-auto {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
        }

        .i0yps4-diag-card {
            background: #fff;
            border: 1px solid var(--i0yps4-border);
            border-radius: var(--i0yps4-radius);
            padding: 32px;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

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

        .i0yps4-diag-icon {
            width: 48px;
            height: 48px;
            background: var(--i0yps4-secondary);
            border-radius: 12px;
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--i0yps4-primary);
            font-size: 24px;
            font-weight: bold;
        }

        .i0yps4-diag-card h3 {
            margin-bottom: 16px;
            font-size: 20px;
        }

        .i0yps4-diag-card p {
            color: var(--i0yps4-text-light);
            font-size: 15px;
        }

        /* 解决方案步骤 - 交错布局 */
        .i0yps4-steps {
            background-color: #fcfdfe;
            padding: 96px 0;
        }

        .i0yps4-step-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            margin-bottom: 80px;
            gap: 48px;
            min-width: 0;
        }

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

        .i0yps4-step-text {
            flex: 1;
            min-width: 300px;
            word-break: break-word;
        }

        .i0yps4-step-visual {
            flex: 1;
            min-width: 300px;
            background: #fff;
            padding: 40px;
            border-radius: 24px;
            border: 1px solid var(--i0yps4-border);
            position: relative;
            box-shadow: 0 4px 20px rgba(0,0,0,0.03);
        }

        .i0yps4-step-num {
            font-size: 64px;
            font-weight: 900;
            color: rgba(0, 102, 204, 0.08);
            position: absolute;
            top: 10px;
            left: 20px;
        }

        .i0yps4-step-text h3 {
            font-size: 28px;
            margin-bottom: 20px;
            color: var(--i0yps4-primary);
        }

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

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

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

        /* 动态内容区块 */
        .i0yps4-dynamic-section {
            padding: 80px 0;
            background: #fff;
        }

        .i0yps4-article-card {
            padding: 24px;
            border-bottom: 1px solid var(--i0yps4-border);
            transition: background 0.3s;
        }

        .i0yps4-article-card:hover {
            background: var(--i0yps4-secondary);
        }

        .i0yps4-article-tag {
            font-size: 12px;
            background: #eee;
            padding: 2px 8px;
            border-radius: 4px;
            margin-right: 10px;
        }

        /* 页脚 */
        .i0yps4-footer {
            background: #1a2a3a;
            color: #fff;
            padding: 64px 0 32px;
        }

        .i0yps4-footer-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            margin-bottom: 48px;
            min-width: 0;
        }

        .i0yps4-footer-col {
            flex: 1;
            min-width: 200px;
        }

        .i0yps4-footer-brand {
            font-size: 24px;
            font-weight: bold;
            margin-bottom: 20px;
            display: block;
        }

        .i0yps4-footer-col h4 {
            margin-bottom: 24px;
            font-size: 18px;
            border-left: 3px solid var(--i0yps4-primary);
            padding-left: 12px;
        }

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

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

        .i0yps4-footer-links a {
            color: #a0aec0;
            text-decoration: none;
            transition: color 0.3s;
        }

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

        .i0yps4-copyright {
            text-align: center;
            padding-top: 32px;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 14px;
            color: #718096;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .i0yps4-nav-wrapper {
                height: auto;
                padding: 16px 0;
            }
            .i0yps4-menu {
                margin-top: 16px;
                width: 100%;
                justify-content: center;
            }
            .i0yps4-hero {
                padding: 64px 0;
                text-align: center;
            }
            .i0yps4-hero-grid {
                flex-direction: column;
            }
            .i0yps4-step-row {
                flex-direction: column !important;
                text-align: center;
            }
            .i0yps4-step-list li {
                text-align: left;
            }
        }

        /* 动画增强 */
        .i0yps4-btn {
            display: inline-block;
            padding: 14px 32px;
            background: var(--i0yps4-primary);
            color: #fff;
            text-decoration: none;
            border-radius: 30px;
            font-weight: bold;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
        }

        .i0yps4-btn:hover {
            background: var(--i0yps4-primary-dark);
            transform: scale(1.05);
            box-shadow: 0 5px 15px rgba(0, 102, 204, 0.3);
        }

        /* 装饰元素 */
        .i0yps4-code-block {
            background: #2d3436;
            color: #fab1a0;
            padding: 20px;
            border-radius: 8px;
            font-family: monospace;
            font-size: 14px;
            overflow-x: auto;
        }