:root {
            --primary-color: #1877F2;
            --secondary-color: #0052D9;
            --bg-color: #F7F9FC;
            --text-color: #1D2129;
            --text-secondary: #4E5969;
            --border-color: #E5E6EB;
            --card-bg: #FFFFFF;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 8px 24px rgba(24, 119, 242, 0.08);
            --radius-md: 12px;
            --radius-lg: 20px;
            --max-width: 1200px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft JhengHei", "Inter", sans-serif;
            background-color: var(--bg-color);
            color: var(--text-color);
            line-height: 1.6;
            overflow-x: hidden;
        }

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

        /* 顶部导航 */
        .aisitex-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 72px;
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            z-index: 1000;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .aisitex-nav-container {
            width: 100%;
            max-width: var(--max-width);
            padding: 0 24px;
            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(--primary-color);
        }

        .aisitex-brand img {
            width: 36px;
            height: 36px;
            border-radius: 8px;
        }

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

        .aisitex-nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: color 0.2s ease;
            position: relative;
            padding: 8px 0;
        }

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

        .aisitex-nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: var(--primary-color);
            border-radius: 2px;
        }

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

        .aisitex-btn-primary {
            background-color: var(--primary-color);
            color: #fff;
            padding: 10px 20px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 14px;
            transition: all 0.2s ease;
            box-shadow: 0 4px 12px rgba(24, 119, 242, 0.2);
        }

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

        .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-color: var(--text-color);
            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;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.4);
            z-index: 998;
        }

        /* 主体内容布局 */
        main {
            margin-top: 72px;
        }

        /* 首屏区块 */
        .aisitex-hero {
            padding: 80px 24px 60px;
            background: linear-gradient(180deg, #FFFFFF 0%, var(--bg-color) 100%);
            overflow: hidden;
        }

        .aisitex-hero-container {
            max-width: var(--max-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1fr 1.1fr;
            gap: 48px;
            align-items: center;
        }

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

        .aisitex-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: rgba(24, 119, 242, 0.1);
            color: var(--primary-color);
            padding: 6px 12px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            width: fit-content;
        }

        .aisitex-hero h1 {
            font-size: 42px;
            line-height: 1.25;
            font-weight: 800;
            color: var(--text-color);
            letter-spacing: -0.5px;
        }

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

        .aisitex-hero-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-top: 8px;
        }

        .aisitex-feature-card {
            background: var(--card-bg);
            padding: 16px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }

        .aisitex-feature-card h3 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--text-color);
        }

        .aisitex-feature-card p {
            font-size: 13px;
            color: var(--text-secondary);
            margin: 0;
        }

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

        .aisitex-btn-secondary {
            background-color: var(--card-bg);
            color: var(--text-color);
            border: 1px solid var(--border-color);
            padding: 10px 20px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 14px;
            transition: all 0.2s ease;
        }

        .aisitex-btn-secondary:hover {
            border-color: var(--primary-color);
            color: var(--primary-color);
        }

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

        .aisitex-hero-media img {
            width: 100%;
            max-width: 640px;
            height: auto;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            object-fit: cover;
        }

        /* 核心功能模块 */
        .aisitex-section {
            padding: 96px 24px;
            max-width: var(--max-width);
            margin: 0 auto;
        }

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

        .aisitex-section-header h2 {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

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

        .aisitex-product-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
            margin-bottom: 48px;
        }

        .aisitex-product-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 40px;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            gap: 20px;
            height: 100%;
        }

        .aisitex-product-card h3 {
            font-size: 22px;
            font-weight: 700;
        }

        .aisitex-product-card p {
            font-size: 15px;
            color: var(--text-secondary);
        }

        .aisitex-product-img {
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            background: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .aisitex-product-img img {
            width: 100%;
            height: auto;
            display: block;
            object-fit: cover;
        }

        /* 下载与CTA区块 */
        .aisitex-cta-section {
            background: linear-gradient(135deg, #0f2b4e 0%, #1877F2 100%);
            color: #fff;
            padding: 80px 24px;
            border-radius: var(--radius-lg);
            margin: 40px 24px 80px;
            max-width: calc(var(--max-width) - 48px);
            margin-left: auto;
            margin-right: auto;
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 48px;
            align-items: center;
            box-shadow: 0 16px 36px rgba(24, 119, 242, 0.25);
        }

        .aisitex-cta-content h2 {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }

        .aisitex-cta-content p {
            font-size: 16px;
            opacity: 0.9;
            margin-bottom: 32px;
            line-height: 1.7;
        }

        .aisitex-platform-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-bottom: 32px;
        }

        .aisitex-platform-item {
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.2);
            padding: 16px;
            border-radius: var(--radius-md);
            backdrop-filter: blur(5px);
        }

        .aisitex-platform-item h4 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 4px;
        }

        .aisitex-platform-item p {
            font-size: 12px;
            opacity: 0.75;
            margin: 0;
        }

        .aisitex-cta-image img {
            width: 100%;
            border-radius: var(--radius-md);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
            object-fit: cover;
        }

        /* 页脚 */
        .aisitex-footer {
            background-color: #1D2129;
            color: #86909C;
            padding: 64px 24px 32px;
            border-top: 1px solid var(--border-color);
        }

        .aisitex-footer-container {
            max-width: var(--max-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 48px;
        }

        .aisitex-footer-brand p {
            margin-top: 16px;
            font-size: 14px;
            line-height: 1.6;
        }

        .aisitex-footer-col h4 {
            color: #FFFFFF;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .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 ease;
        }

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

        .aisitex-footer-bottom {
            max-width: var(--max-width);
            margin: 0 auto;
            padding-top: 24px;
            border-top: 1px solid #30363D;
            text-align: center;
            font-size: 13px;
        }

        /* 响应式断点 */
        @media (max-width: 960px) {
            .aisitex-hero-container,
            .aisitex-product-grid,
            .aisitex-cta-section {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .aisitex-hero h1 {
                font-size: 32px;
            }

            .aisitex-nav-menu {
                position: fixed;
                top: 72px;
                left: -100%;
                width: 100%;
                height: calc(100vh - 72px);
                background-color: var(--card-bg);
                flex-direction: column;
                align-items: flex-start;
                padding: 32px;
                gap: 24px;
                box-shadow: 0 10px 20px rgba(0,0,0,0.1);
                transition: left 0.3s ease;
            }

            .aisitex-nav-menu.active {
                left: 0;
            }

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

            .aisitex-nav-overlay.active {
                display: block;
            }

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

        @media (max-width: 600px) {
            .aisitex-hero-features,
            .aisitex-platform-list,
            .aisitex-footer-container {
                grid-template-columns: 1fr;
            }
        }

.aisitex-header {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft JhengHei", "Inter", sans-serif;
    line-height: 1.6;
    color: #1D2129;
}

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

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

.aisitex-header{
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 72px;
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid #E5E6EB;
            z-index: 1000;
            display: flex;
            align-items: center;
            justify-content: center;
        }

.aisitex-header .aisitex-nav-container{
            width: 100%;
            max-width: 1200px;
            padding: 0 24px;
            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: #1877F2;
        }

.aisitex-header .aisitex-brand img{
            width: 36px;
            height: 36px;
            border-radius: 8px;
        }

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

.aisitex-header .aisitex-nav-link{
            font-size: 15px;
            font-weight: 500;
            color: #4E5969;
            transition: color 0.2s ease;
            position: relative;
            padding: 8px 0;
        }

.aisitex-header .aisitex-nav-link:hover, .aisitex-header .aisitex-nav-link.active{
            color: #1877F2;
        }

.aisitex-header .aisitex-nav-link.active::after{
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: #1877F2;
            border-radius: 2px;
        }

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

.aisitex-header .aisitex-btn-primary{
            background-color: #1877F2;
            color: #fff;
            padding: 10px 20px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 14px;
            transition: all 0.2s ease;
            box-shadow: 0 4px 12px rgba(24, 119, 242, 0.2);
        }

.aisitex-header .aisitex-btn-primary:hover{
            background-color: #0052D9;
            transform: translateY(-1px);
        }

.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-color: #1D2129;
            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; }

.aisitex-header .aisitex-nav-overlay{
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.4);
            z-index: 998;
        }

@media (max-width: 960px){.aisitex-header .aisitex-nav-menu{
                position: fixed;
                top: 72px;
                left: -100%;
                width: 100%;
                height: calc(100vh - 72px);
                background-color: #FFFFFF;
                flex-direction: column;
                align-items: flex-start;
                padding: 32px;
                gap: 24px;
                box-shadow: 0 10px 20px rgba(0,0,0,0.1);
                transition: left 0.3s ease;
            }

.aisitex-header .aisitex-nav-menu.active{
                left: 0;
            }

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

.aisitex-header .aisitex-nav-overlay.active{
                display: block;
            }}

.aisitex-footer {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft JhengHei", "Inter", sans-serif;
    line-height: 1.6;
    color: #1D2129;
}

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

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

.aisitex-footer .aisitex-brand{
            display: flex;
            align-items: center;
            gap: 12px;
            font-weight: 700;
            font-size: 20px;
            color: #1877F2;
        }

.aisitex-footer .aisitex-brand img{
            width: 36px;
            height: 36px;
            border-radius: 8px;
        }

.aisitex-footer{
            background-color: #1D2129;
            color: #86909C;
            padding: 64px 24px 32px;
            border-top: 1px solid #E5E6EB;
        }

.aisitex-footer .aisitex-footer-container{
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 48px;
        }

.aisitex-footer .aisitex-footer-brand p{
            margin-top: 16px;
            font-size: 14px;
            line-height: 1.6;
        }

.aisitex-footer .aisitex-footer-col h4{
            color: #FFFFFF;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 20px;
        }

.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 ease;
        }

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

.aisitex-footer .aisitex-footer-bottom{
            max-width: 1200px;
            margin: 0 auto;
            padding-top: 24px;
            border-top: 1px solid #30363D;
            text-align: center;
            font-size: 13px;
        }

@media (max-width: 960px){.aisitex-footer .aisitex-footer-container{
                grid-template-columns: 1fr 1fr;
            }}

@media (max-width: 600px){.aisitex-footer .aisitex-footer-container{
                grid-template-columns: 1fr;
            }}