:root {
            --aisitex-primary: #3a76f0;
            --aisitex-primary-dark: #285bc2;
            --aisitex-secondary: #121826;
            --aisitex-bg: #f8fafc;
            --aisitex-surface: #ffffff;
            --aisitex-text: #0f172a;
            --aisitex-text-muted: #64748b;
            --aisitex-border: #e2e8f0;
            --aisitex-radius: 12px;
            --aisitex-max-width: 1200px;
        }

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

        body {
            font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
            background-color: var(--aisitex-bg);
            color: var(--aisitex-text);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        /* 顶部导航 */
        .aisitex-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--aisitex-border);
        }

        .aisitex-nav-container {
            max-width: var(--aisitex-max-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .aisitex-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            font-weight: 700;
            font-size: 20px;
            color: var(--aisitex-secondary);
        }

        .aisitex-brand img {
            width: 36px;
            height: 36px;
        }

        .aisitex-nav-menu {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .aisitex-nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--aisitex-text-muted);
            transition: color 0.2s;
        }

        .aisitex-nav-link:hover,
        .aisitex-nav-link.active {
            color: var(--aisitex-primary);
        }

        .aisitex-menu-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
        }

        .aisitex-menu-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--aisitex-text);
            margin: 5px 0;
            transition: 0.3s;
        }

        .aisitex-nav-overlay {
            display: none;
        }

        /* 主体内容 */
        main {
            display: block;
        }

        /* 首屏区块 */
        .aisitex-hero {
            max-width: var(--aisitex-max-width);
            margin: 0 auto;
            padding: 80px 24px 60px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .aisitex-hero-content {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .aisitex-hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(58, 118, 240, 0.1);
            color: var(--aisitex-primary);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            width: max-content;
        }

        .aisitex-hero h1 {
            font-size: 42px;
            font-weight: 700;
            line-height: 1.2;
            color: var(--aisitex-secondary);
        }

        .aisitex-hero p {
            font-size: 18px;
            color: var(--aisitex-text-muted);
            line-height: 1.7;
        }

        .aisitex-hero-actions {
            display: flex;
            gap: 16px;
            margin-top: 12px;
        }

        .aisitex-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 28px;
            border-radius: var(--aisitex-radius);
            font-size: 16px;
            font-weight: 600;
            transition: all 0.2s;
            cursor: pointer;
        }

        .aisitex-btn-primary {
            background: var(--aisitex-primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(58, 118, 240, 0.3);
        }

        .aisitex-btn-primary:hover {
            background: var(--aisitex-primary-dark);
            transform: translateY(-1px);
        }

        .aisitex-btn-secondary {
            background: #fff;
            color: var(--aisitex-text);
            border: 1px solid var(--aisitex-border);
        }

        .aisitex-btn-secondary:hover {
            background: #f1f5f9;
            border-color: #cbd5e1;
        }

        .aisitex-hero-visual {
            position: relative;
            display: flex;
            justify-content: center;
        }

        .aisitex-hero-visual img {
            width: 100%;
            max-width: 460px;
            border-radius: 24px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
            border: 1px solid var(--aisitex-border);
        }

        /* 步骤路径区块 */
        .aisitex-workflow {
            max-width: var(--aisitex-max-width);
            margin: 0 auto;
            padding: 80px 24px;
            border-top: 1px solid var(--aisitex-border);
        }

        .aisitex-section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 60px;
        }

        .aisitex-section-header h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--aisitex-secondary);
            margin-bottom: 16px;
        }

        .aisitex-section-header p {
            font-size: 16px;
            color: var(--aisitex-text-muted);
        }

        .aisitex-steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }

        .aisitex-step-card {
            background: var(--aisitex-surface);
            border: 1px solid var(--aisitex-border);
            border-radius: var(--aisitex-radius);
            padding: 32px;
            position: relative;
            transition: transform 0.2s;
        }

        .aisitex-step-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 24px rgba(0, 0, 0, 0.04);
        }

        .aisitex-step-num {
            font-size: 14px;
            font-weight: 700;
            color: var(--aisitex-primary);
            background: rgba(58, 118, 240, 0.1);
            padding: 4px 10px;
            border-radius: 6px;
            display: inline-block;
            margin-bottom: 16px;
        }

        .aisitex-step-card h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--aisitex-secondary);
            margin-bottom: 12px;
        }

        .aisitex-step-card p {
            font-size: 15px;
            color: var(--aisitex-text-muted);
            line-height: 1.6;
        }

        /* 证据展示区块 */
        .aisitex-showcase {
            background: #ffffff;
            border-top: 1px solid var(--aisitex-border);
            border-bottom: 1px solid var(--aisitex-border);
            padding: 100px 24px;
        }

        .aisitex-showcase-container {
            max-width: var(--aisitex-max-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
        }

        .aisitex-showcase-img {
            display: flex;
            justify-content: center;
        }

        .aisitex-showcase-img img {
            max-width: 380px;
            width: 100%;
            border-radius: 24px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
        }

        .aisitex-showcase-content {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .aisitex-showcase-content h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--aisitex-secondary);
            line-height: 1.25;
        }

        .aisitex-showcase-content p {
            font-size: 16px;
            color: var(--aisitex-text-muted);
            line-height: 1.7;
        }

        /* 底部 */
        .aisitex-footer {
            background: var(--aisitex-secondary);
            color: #94a3b8;
            padding: 60px 24px 40px;
        }

        .aisitex-footer-container {
            max-width: var(--aisitex-max-width);
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 40px;
        }

        .aisitex-footer-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            padding-bottom: 32px;
        }

        .aisitex-footer-brand {
            color: #fff;
            font-weight: 700;
            font-size: 18px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .aisitex-footer-links {
            display: flex;
            gap: 24px;
        }

        .aisitex-footer-links a {
            color: #94a3b8;
            font-size: 14px;
            transition: color 0.2s;
        }

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

        .aisitex-footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 14px;
        }

        /* 响应式断点 */
        @media (max-width: 900px) {
            .aisitex-hero,
            .aisitex-showcase-container {
                grid-template-columns: 1fr;
                gap: 40px;
                text-align: center;
            }

            .aisitex-hero-content,
            .aisitex-showcase-content {
                align-items: center;
            }

            .aisitex-steps-grid {
                grid-template-columns: 1fr;
            }

            .aisitex-nav-menu {
                display: none;
                position: fixed;
                top: 72px;
                left: 0;
                width: 100%;
                background: #fff;
                flex-direction: column;
                padding: 24px;
                border-bottom: 1px solid var(--aisitex-border);
                box-shadow: 0 10px 20px rgba(0,0,0,0.05);
            }

            .aisitex-nav-menu.active {
                display: flex;
            }

            .aisitex-menu-toggle {
                display: block;
            }

            .aisitex-footer-top {
                flex-direction: column;
                gap: 20px;
                align-text: center;
            }

            .aisitex-footer-bottom {
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }
        }

.aisitex-header {
    font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
    color: #0f172a;
}

.aisitex-header, .aisitex-header *, .aisitex-header::before, .aisitex-header *::before, .aisitex-header::after, .aisitex-header *::after{
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

.aisitex-header a{
            color: inherit;
            text-decoration: none;
        }

.aisitex-header{
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid #e2e8f0;
        }

.aisitex-header .aisitex-nav-container{
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

.aisitex-header .aisitex-brand{
            display: flex;
            align-items: center;
            gap: 12px;
            font-weight: 700;
            font-size: 20px;
            color: #121826;
        }

.aisitex-header .aisitex-brand img{
            width: 36px;
            height: 36px;
        }

.aisitex-header .aisitex-nav-menu{
            display: flex;
            align-items: center;
            gap: 32px;
        }

.aisitex-header .aisitex-nav-link{
            font-size: 15px;
            font-weight: 500;
            color: #64748b;
            transition: color 0.2s;
        }

.aisitex-header .aisitex-nav-link:hover, .aisitex-header .aisitex-nav-link.active{
            color: #3a76f0;
        }

.aisitex-header .aisitex-menu-toggle{
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
        }

.aisitex-header .aisitex-menu-toggle span{
            display: block;
            width: 24px;
            height: 2px;
            background: #0f172a;
            margin: 5px 0;
            transition: 0.3s;
        }

@media (max-width: 900px){.aisitex-header .aisitex-nav-menu{
                display: none;
                position: fixed;
                top: 72px;
                left: 0;
                width: 100%;
                background: #fff;
                flex-direction: column;
                padding: 24px;
                border-bottom: 1px solid #e2e8f0;
                box-shadow: 0 10px 20px rgba(0,0,0,0.05);
            }

.aisitex-header .aisitex-nav-menu.active{
                display: flex;
            }

.aisitex-header .aisitex-menu-toggle{
                display: block;
            }}

.aisitex-footer {
    font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
    color: #0f172a;
}

.aisitex-footer, .aisitex-footer *, .aisitex-footer::before, .aisitex-footer *::before, .aisitex-footer::after, .aisitex-footer *::after{
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

.aisitex-footer a{
            color: inherit;
            text-decoration: none;
        }

.aisitex-footer{
            background: #121826;
            color: #94a3b8;
            padding: 60px 24px 40px;
        }

.aisitex-footer .aisitex-footer-container{
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 40px;
        }

.aisitex-footer .aisitex-footer-top{
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            padding-bottom: 32px;
        }

.aisitex-footer .aisitex-footer-brand{
            color: #fff;
            font-weight: 700;
            font-size: 18px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

.aisitex-footer .aisitex-footer-links{
            display: flex;
            gap: 24px;
        }

.aisitex-footer .aisitex-footer-links a{
            color: #94a3b8;
            font-size: 14px;
            transition: color 0.2s;
        }

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

.aisitex-footer .aisitex-footer-bottom{
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 14px;
        }

@media (max-width: 900px){.aisitex-footer .aisitex-footer-top{
                flex-direction: column;
                gap: 20px;
                align-text: center;
            }

.aisitex-footer .aisitex-footer-bottom{
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }}