:root {
            --vm2i-primary: #0078d4;
            --vm2i-secondary: #1a2a44;
            --vm2i-accent: #00f2fe;
            --vm2i-bg-light: #f8fafc;
            --vm2i-text-main: #1e293b;
            --vm2i-text-muted: #64748b;
            --vm2i-white: #ffffff;
            --vm2i-terminal-bg: #0c0c0c;
            --vm2i-spacing-unit: 8px;
            --vm2i-max-width: 1300px;
        }

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

        body {
            font-family: "Inter", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
            line-height: 1.7;
            color: var(--vm2i-text-main);
            background-color: var(--vm2i-bg-light);
            word-break: keep-all;
            overflow-wrap: break-word;
        }

        /* 导航系统 */
        .vm2i-navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
        }

        .vm2i-nav-container {
            max-width: var(--vm2i-max-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding: 16px 24px;
        }

        .vm2i-logo {
            flex: 0 0 auto;
            min-width: 0;
        }

        .vm2i-logo img {
            height: 32px;
            display: block;
        }

        .vm2i-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 16px;
        }

        .vm2i-menu-item a {
            text-decoration: none;
            color: var(--vm2i-text-main);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 6px;
            transition: background 0.3s;
        }

        .vm2i-menu-item a:hover {
            background: rgba(0, 120, 212, 0.1);
            color: var(--vm2i-primary);
        }

        .vm2i-menu-item a.vm2i-active {
            color: var(--vm2i-white);
            background: var(--vm2i-primary);
        }

        /* Hero 视觉区 - 独特对角线分割布局 */
        .vm2i-hero {
            position: relative;
            padding: 160px 24px 100px;
            background: linear-gradient(135deg, var(--vm2i-secondary) 0%, #0f172a 100%);
            color: var(--vm2i-white);
            overflow: hidden;
        }

        .vm2i-hero::after {
            content: "";
            position: absolute;
            bottom: -50px;
            right: -50px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, var(--vm2i-primary) 0%, transparent 70%);
            opacity: 0.2;
            filter: blur(40px);
        }

        .vm2i-hero-content {
            max-width: var(--vm2i-max-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
        }

        .vm2i-hero-text {
            flex: 1;
            min-width: 300px;
        }

        .vm2i-hero-text h1 {
            font-size: clamp(2rem, 5vw, 3.5rem);
            line-height: 1.2;
            margin-bottom: 24px;
            font-weight: 800;
        }

        .vm2i-hero-text p {
            font-size: clamp(1rem, 1.5vw, 1.25rem);
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 32px;
            max-width: 600px;
        }

        .vm2i-visual-terminal {
            flex: 1;
            min-width: 320px;
            background: var(--vm2i-terminal-bg);
            border-radius: 12px;
            padding: 20px;
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
            border: 1px solid rgba(255, 255, 255, 0.1);
            font-family: 'Courier New', Courier, monospace;
        }

        .vm2i-terminal-header {
            display: flex;
            gap: 8px;
            margin-bottom: 16px;
        }

        .vm2i-dot { width: 12px; height: 12px; border-radius: 50%; }
        .vm2i-dot-red { background: #ff5f56; }
        .vm2i-dot-yellow { background: #ffbd2e; }
        .vm2i-dot-green { background: #27c93f; }

        .vm2i-terminal-line { margin-bottom: 8px; font-size: 14px; }
        .vm2i-error-text { color: #ff5f56; }
        .vm2i-success-text { color: #27c93f; }

        /* 内容区块通用 */
        .vm2i-section {
            padding: 80px 24px;
            max-width: var(--vm2i-max-width);
            margin: 0 auto;
        }

        .vm2i-section-title {
            text-align: center;
            margin-bottom: 64px;
        }

        .vm2i-section-title h2 {
            font-size: clamp(1.5rem, 3vw, 2.25rem);
            margin-bottom: 16px;
        }

        /* 解决方案网格 */
        .vm2i-solution-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }

        .vm2i-step-card {
            background: var(--vm2i-white);
            padding: 40px;
            border-radius: 16px;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            display: flex;
            flex-direction: column;
            min-width: 0;
            border: 1px solid rgba(0, 0, 0, 0.05);
        }

        .vm2i-step-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
        }

        .vm2i-step-num {
            font-size: 48px;
            font-weight: 900;
            color: rgba(0, 120, 212, 0.1);
            margin-bottom: -24px;
        }

        .vm2i-step-card h3 {
            margin-bottom: 16px;
            color: var(--vm2i-secondary);
        }

        .vm2i-step-card p {
            color: var(--vm2i-text-muted);
            margin-bottom: 24px;
        }

        .vm2i-code-block {
            background: #f1f5f9;
            padding: 12px;
            border-radius: 8px;
            font-family: monospace;
            font-size: 13px;
            color: #475569;
            border-left: 4px solid var(--vm2i-primary);
        }

        /* 深度诊断区 */
        .vm2i-diagnostic-section {
            background: var(--vm2i-white);
            border-radius: 24px;
            padding: 64px;
            margin-top: 48px;
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            align-items: center;
        }

        .vm2i-diagnostic-image {
            flex: 1;
            min-width: 300px;
            background: linear-gradient(45deg, #e2e8f0, #f8fafc);
            height: 300px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }

        .vm2i-diagnostic-image::before {
            content: "UTF-8";
            font-size: 64px;
            font-weight: 800;
            color: rgba(0, 120, 212, 0.1);
        }

        .vm2i-diagnostic-text {
            flex: 1.2;
            min-width: 300px;
        }

        .vm2i-diagnostic-text h2 {
            margin-bottom: 24px;
            font-size: 28px;
        }

        .vm2i-list {
            list-style: none;
        }

        .vm2i-list li {
            padding-left: 28px;
            position: relative;
            margin-bottom: 16px;
        }

        .vm2i-list li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--vm2i-primary);
            font-weight: bold;
        }

        /* 页脚 */
        .vm2i-footer {
            background: var(--vm2i-secondary);
            color: var(--vm2i-white);
            padding: 80px 24px 40px;
        }

        .vm2i-footer-grid {
            max-width: var(--vm2i-max-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 64px;
        }

        .vm2i-footer-brand h4 {
            font-size: 20px;
            margin-bottom: 24px;
            color: var(--vm2i-white);
        }

        .vm2i-footer-links h5 {
            margin-bottom: 24px;
            font-size: 16px;
        }

        .vm2i-footer-links ul {
            list-style: none;
        }

        .vm2i-footer-links li {
            margin-bottom: 12px;
        }

        .vm2i-footer-links a {
            color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
            transition: color 0.3s;
        }

        .vm2i-footer-links a:hover {
            color: var(--vm2i-white);
        }

        .vm2i-copyright {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: rgba(255, 255, 255, 0.4);
            font-size: 14px;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .vm2i-menu {
                display: none; /* 简化演示，手机端通常用汉堡菜单 */
            }
            .vm2i-hero {
                padding-top: 120px;
            }
            .vm2i-diagnostic-section {
                padding: 32px;
            }
        }
    


        @keyframes blink {
            0%, 100% { opacity: 1; }
            50% { opacity: 0; }
        }