:root {
            --aisitex-primary: #0052FF;
            --aisitex-secondary: #00D26A;
            --aisitex-bg: #FFFFFF;
            --aisitex-bg-alt: #F6F8FC;
            --aisitex-text: #0A0D14;
            --aisitex-text-muted: #525B75;
            --aisitex-border: #E2E8F0;
            --aisitex-container: 1280px;
        }

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

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

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

        /* 顶栏与导航 */
        .aisitex-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            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-container);
            margin: 0 auto;
            padding: 0 24px;
            height: 76px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .aisitex-brand {
            font-size: 22px;
            font-weight: 800;
            color: var(--aisitex-primary);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .aisitex-brand span {
            color: var(--aisitex-text);
        }

        .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 ease;
        }

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

        .aisitex-nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .aisitex-btn-header {
            background: var(--aisitex-primary);
            color: #fff;
            padding: 10px 20px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 600;
            transition: opacity 0.2s;
        }

        .aisitex-btn-header:hover {
            opacity: 0.9;
        }

        .aisitex-menu-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            width: 32px;
            height: 32px;
            position: relative;
        }

        .aisitex-menu-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--aisitex-text);
            position: absolute;
            left: 4px;
            transition: 0.3s;
        }

        .aisitex-menu-toggle span:nth-child(1) { top: 9px; }
        .aisitex-menu-toggle span:nth-child(2) { top: 15px; }
        .aisitex-menu-toggle span:nth-child(3) { top: 21px; }

        .aisitex-nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.4);
            z-index: 998;
        }

        /* 首屏 Hero 区块 */
        .aisitex-hero {
            background: var(--aisitex-bg-alt);
            padding: 80px 24px 100px;
            overflow: hidden;
            border-bottom: 1px solid var(--aisitex-border);
        }

        .aisitex-hero-inner {
            max-width: var(--aisitex-container);
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 60px;
            align-items: center;
        }

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

        .aisitex-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 82, 255, 0.08);
            color: var(--aisitex-primary);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            width: fit-content;
        }

        .aisitex-hero-title {
            font-size: 48px;
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -1px;
            color: var(--aisitex-text);
        }

        .aisitex-hero-desc {
            font-size: 18px;
            color: var(--aisitex-text-muted);
            line-height: 1.6;
        }

        .aisitex-hero-actions {
            display: flex;
            gap: 16px;
            margin-top: 8px;
        }

        .aisitex-btn-primary {
            background: var(--aisitex-primary);
            color: #fff;
            padding: 16px 32px;
            border-radius: 12px;
            font-size: 16px;
            font-weight: 600;
            box-shadow: 0 10px 25px rgba(0, 82, 255, 0.25);
            transition: transform 0.2s, box-shadow 0.2s;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        .aisitex-btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 14px 30px rgba(0, 82, 255, 0.35);
        }

        .aisitex-btn-secondary {
            background: #fff;
            color: var(--aisitex-text);
            border: 1px solid var(--aisitex-border);
            padding: 16px 28px;
            border-radius: 12px;
            font-size: 16px;
            font-weight: 600;
            transition: border-color 0.2s, background-color 0.2s;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        .aisitex-btn-secondary:hover {
            border-color: var(--aisitex-primary);
            background-color: rgba(0, 82, 255, 0.02);
        }

        .aisitex-hero-stage {
            position: relative;
        }

        .aisitex-hero-stage img {
            width: 100%;
            height: auto;
            border-radius: 16px;
            box-shadow: 0 20px 40px rgba(10, 13, 20, 0.08);
            border: 1px solid var(--aisitex-border);
        }

        /* 为什么选择快连应用 (Feature Highlight) */
        .aisitex-features {
            padding: 100px 24px;
            background: var(--aisitex-bg);
        }

        .aisitex-section-header {
            max-width: 700px;
            margin: 0 auto 64px;
            text-align: center;
        }

        .aisitex-section-tag {
            font-size: 13px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--aisitex-primary);
            margin-bottom: 12px;
            display: block;
        }

        .aisitex-section-title {
            font-size: 36px;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }

        .aisitex-section-summary {
            font-size: 17px;
            color: var(--aisitex-text-muted);
            line-height: 1.6;
        }

        .aisitex-feature-grid {
            max-width: var(--aisitex-container);
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .aisitex-feature-visual img {
            width: 100%;
            height: auto;
            border-radius: 16px;
            border: 1px solid var(--aisitex-border);
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
        }

        .aisitex-feature-list {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }

        .aisitex-feature-item {
            display: flex;
            gap: 20px;
        }

        .aisitex-feature-icon {
            width: 48px;
            height: 48px;
            background: rgba(0, 82, 255, 0.08);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--aisitex-primary);
            flex-shrink: 0;
            font-weight: bold;
            font-size: 18px;
        }

        .aisitex-feature-text h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .aisitex-feature-text p {
            font-size: 15px;
            color: var(--aisitex-text-muted);
            line-height: 1.5;
        }

        /* 全平台客户端支持 (Platform Showcase) */
        .aisitex-platforms {
            padding: 100px 24px;
            background: var(--aisitex-bg-alt);
            border-top: 1px solid var(--aisitex-border);
            border-bottom: 1px solid var(--aisitex-border);
        }

        .aisitex-platform-grid {
            max-width: var(--aisitex-container);
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .aisitex-platform-card {
            background: #fff;
            padding: 40px 32px;
            border-radius: 16px;
            border: 1px solid var(--aisitex-border);
            transition: transform 0.2s, box-shadow 0.2s;
        }

        .aisitex-platform-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 30px rgba(0,0,0,0.06);
        }

        .aisitex-platform-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--aisitex-text);
        }

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

        /* 行动横幅 (Action Banner) */
        .aisitex-banner {
            padding: 100px 24px;
            background: var(--aisitex-bg);
            text-align: center;
        }

        .aisitex-banner-box {
            max-width: var(--aisitex-container);
            margin: 0 auto;
            background: linear-gradient(135deg, #0052FF 0%, #0038B8 100%);
            border-radius: 24px;
            padding: 80px 40px;
            color: #fff;
            box-shadow: 0 20px 50px rgba(0, 82, 255, 0.3);
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 24px;
        }

        .aisitex-banner-box h2 {
            font-size: 40px;
            font-weight: 800;
            letter-spacing: -0.5px;
        }

        .aisitex-banner-box p {
            font-size: 18px;
            opacity: 0.9;
            max-width: 600px;
        }

        .aisitex-btn-white {
            background: #fff;
            color: var(--aisitex-primary);
            padding: 16px 36px;
            border-radius: 12px;
            font-size: 16px;
            font-weight: 700;
            transition: transform 0.2s, background-color 0.2s;
            margin-top: 8px;
        }

        .aisitex-btn-white:hover {
            transform: translateY(-2px);
            background-color: #f0f4ff;
        }

        /* 页脚 */
        .aisitex-footer {
            background: #0A0D14;
            color: #94A3B8;
            padding: 60px 24px 40px;
        }

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

        .aisitex-footer-top {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            flex-wrap: wrap;
            gap: 30px;
        }

        .aisitex-footer-brand .aisitex-brand {
            color: #fff;
            margin-bottom: 12px;
        }

        .aisitex-footer-brand p {
            font-size: 14px;
            max-width: 320px;
        }

        .aisitex-footer-links {
            display: flex;
            gap: 60px;
            flex-wrap: wrap;
        }

        .aisitex-footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .aisitex-footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .aisitex-footer-col a {
            font-size: 14px;
            transition: color 0.2s;
        }

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

        .aisitex-footer-bottom {
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            text-align: center;
            font-size: 13px;
        }

        /* 响应式断点 */
        @media (max-width: 960px) {
            .aisitex-hero-inner,
            .aisitex-feature-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .aisitex-hero-title {
                font-size: 38px;
            }

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

            .aisitex-nav-menu {
                display: none;
                position: fixed;
                top: 76px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 24px;
                box-shadow: 0 10px 20px rgba(0,0,0,0.05);
                border-bottom: 1px solid var(--aisitex-border);
                gap: 20px;
                align-items: flex-start;
            }

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

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

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

.aisitex-header {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #0A0D14;
}

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

.aisitex-header{
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid #E2E8F0;
        }

.aisitex-header .aisitex-nav-container{
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
            height: 76px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

.aisitex-header .aisitex-brand{
            font-size: 22px;
            font-weight: 800;
            color: #0052FF;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

.aisitex-header .aisitex-brand span{
            color: #0A0D14;
        }

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

.aisitex-header .aisitex-nav-link{
            font-size: 15px;
            font-weight: 500;
            color: #525B75;
            transition: color 0.2s ease;
        }

.aisitex-header .aisitex-nav-link:hover, .aisitex-header .aisitex-nav-link.active{
            color: #0052FF;
        }

.aisitex-header .aisitex-nav-actions{
            display: flex;
            align-items: center;
            gap: 16px;
        }

.aisitex-header .aisitex-btn-header{
            background: #0052FF;
            color: #fff;
            padding: 10px 20px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 600;
            transition: opacity 0.2s;
        }

.aisitex-header .aisitex-btn-header:hover{
            opacity: 0.9;
        }

.aisitex-header .aisitex-menu-toggle{
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            width: 32px;
            height: 32px;
            position: relative;
        }

.aisitex-header .aisitex-menu-toggle span{
            display: block;
            width: 24px;
            height: 2px;
            background: #0A0D14;
            position: absolute;
            left: 4px;
            transition: 0.3s;
        }

.aisitex-header .aisitex-menu-toggle span:nth-child(1){ top: 9px; }

.aisitex-header .aisitex-menu-toggle span:nth-child(2){ top: 15px; }

.aisitex-header .aisitex-menu-toggle span:nth-child(3){ top: 21px; }

@media (max-width: 960px){.aisitex-header .aisitex-nav-menu{
                display: none;
                position: fixed;
                top: 76px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 24px;
                box-shadow: 0 10px 20px rgba(0,0,0,0.05);
                border-bottom: 1px solid #E2E8F0;
                gap: 20px;
                align-items: flex-start;
            }

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

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

.aisitex-header .aisitex-nav-actions{
                display: none;
            }}

.aisitex-footer {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #0A0D14;
}

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

.aisitex-footer .aisitex-brand{
            font-size: 22px;
            font-weight: 800;
            color: #0052FF;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

.aisitex-footer .aisitex-brand span{
            color: #0A0D14;
        }

.aisitex-footer{
            background: #0A0D14;
            color: #94A3B8;
            padding: 60px 24px 40px;
        }

.aisitex-footer .aisitex-footer-inner{
            max-width: 1280px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 40px;
        }

.aisitex-footer .aisitex-footer-top{
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            flex-wrap: wrap;
            gap: 30px;
        }

.aisitex-footer .aisitex-footer-brand .aisitex-brand{
            color: #fff;
            margin-bottom: 12px;
        }

.aisitex-footer .aisitex-footer-brand p{
            font-size: 14px;
            max-width: 320px;
        }

.aisitex-footer .aisitex-footer-links{
            display: flex;
            gap: 60px;
            flex-wrap: wrap;
        }

.aisitex-footer .aisitex-footer-col h4{
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 16px;
        }

.aisitex-footer .aisitex-footer-col ul{
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

.aisitex-footer .aisitex-footer-col a{
            font-size: 14px;
            transition: color 0.2s;
        }

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

.aisitex-footer .aisitex-footer-bottom{
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            text-align: center;
            font-size: 13px;
        }