:root {
            --aisitex-primary: #2B579A;
            --aisitex-secondary: #D83B01;
            --aisitex-bg: #F3F3F3;
            --aisitex-text: #242424;
            --aisitex-text-light: #666666;
            --aisitex-white: #FFFFFF;
            --aisitex-border: #E1DFDD;
            --aisitex-container: 1200px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--aisitex-bg);
            color: var(--aisitex-text);
            line-height: 1.6;
            overflow-x: hidden;
        }

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

        /* 顶部导航栏 */
        .aisitex-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--aisitex-border);
        }

        .aisitex-header-inner {
            max-width: var(--aisitex-container);
            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: 18px;
            color: var(--aisitex-primary);
        }

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

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

        .aisitex-nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--aisitex-text);
            transition: color 0.2s ease;
            position: relative;
            padding: 6px 0;
        }

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

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

        .aisitex-menu-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            width: 30px;
            height: 30px;
            position: relative;
        }

        .aisitex-menu-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background-color: var(--aisitex-text);
            position: absolute;
            left: 3px;
            transition: 0.3s;
        }

        .aisitex-menu-toggle span:nth-child(1) { top: 8px; }
        .aisitex-menu-toggle span:nth-child(2) { top: 14px; }
        .aisitex-menu-toggle span:nth-child(3) { top: 20px; }

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

        /* 首屏 Hero 区域 */
        .aisitex-hero {
            max-width: var(--aisitex-container);
            margin: 0 auto;
            padding: 60px 24px 80px;
        }

        .aisitex-hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 60px;
            align-items: center;
        }

        .aisitex-platform-selector {
            display: inline-flex;
            background: rgba(43, 87, 154, 0.08);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            color: var(--aisitex-primary);
            margin-bottom: 24px;
            letter-spacing: 0.5px;
        }

        .aisitex-hero-title {
            font-size: 44px;
            font-weight: 700;
            line-height: 1.25;
            color: var(--aisitex-text);
            margin-bottom: 20px;
        }

        .aisitex-hero-subtitle {
            font-size: 18px;
            color: var(--aisitex-text-light);
            line-height: 1.6;
            margin-bottom: 36px;
        }

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

        .aisitex-btn-primary {
            background-color: var(--aisitex-primary);
            color: var(--aisitex-white);
            padding: 14px 28px;
            border-radius: 6px;
            font-weight: 600;
            font-size: 16px;
            transition: background-color 0.2s, transform 0.1s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 4px 12px rgba(43, 87, 154, 0.25);
        }

        .aisitex-btn-primary:hover {
            background-color: #1f4278;
        }

        .aisitex-btn-secondary {
            background-color: transparent;
            color: var(--aisitex-primary);
            border: 2px solid var(--aisitex-primary);
            padding: 12px 26px;
            border-radius: 6px;
            font-weight: 600;
            font-size: 16px;
            transition: background-color 0.2s;
        }

        .aisitex-btn-secondary:hover {
            background-color: rgba(43, 87, 154, 0.05);
        }

        .aisitex-hero-image-wrap {
            position: relative;
            background: linear-gradient(135deg, #ffffff 0%, #e6efff 100%);
            border-radius: 20px;
            padding: 40px;
            border: 1px solid var(--aisitex-border);
            box-shadow: 0 16px 32px rgba(0,0,0,0.06);
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .aisitex-hero-image-wrap img {
            max-width: 100%;
            height: auto;
            border-radius: 12px;
            object-fit: contain;
        }

        .aisitex-version-note {
            margin-top: 16px;
            font-size: 13px;
            color: var(--aisitex-text-light);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .aisitex-version-note::before {
            content: '';
            width: 8px;
            height: 8px;
            background-color: #107c10;
            border-radius: 50%;
        }

        /* 全宽色带切换区块：产品能力图谱总览 */
        .aisitex-section-band {
            background-color: var(--aisitex-white);
            border-top: 1px solid var(--aisitex-border);
            border-bottom: 1px solid var(--aisitex-border);
            padding: 80px 0;
        }

        .aisitex-container-inner {
            max-width: var(--aisitex-container);
            margin: 0 auto;
            padding: 0 24px;
        }

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

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

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

        .aisitex-section-summary {
            font-size: 16px;
            color: var(--aisitex-text-light);
            line-height: 1.6;
        }

        .aisitex-atlas-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            margin-bottom: 60px;
        }

        .aisitex-atlas-card {
            background-color: var(--aisitex-bg);
            border: 1px solid var(--aisitex-border);
            border-radius: 12px;
            padding: 32px;
            transition: transform 0.2s, box-shadow 0.2s;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .aisitex-atlas-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 24px rgba(0,0,0,0.08);
            border-color: var(--aisitex-primary);
        }

        .aisitex-atlas-card h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--aisitex-text);
            margin-bottom: 16px;
        }

        .aisitex-atlas-card p {
            font-size: 15px;
            color: var(--aisitex-text-light);
            line-height: 1.6;
            margin-bottom: 24px;
        }

        .aisitex-link-arrow {
            font-weight: 600;
            font-size: 14px;
            color: var(--aisitex-primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .aisitex-link-arrow:hover {
            text-decoration: underline;
        }

        .aisitex-showcase-split {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
            background: var(--aisitex-bg);
            border-radius: 16px;
            padding: 40px;
            border: 1px solid var(--aisitex-border);
        }

        .aisitex-showcase-content h4 {
            font-size: 24px;
            font-weight: 600;
            margin-bottom: 16px;
            color: var(--aisitex-text);
        }

        .aisitex-showcase-content p {
            font-size: 15px;
            color: var(--aisitex-text-light);
            line-height: 1.6;
            margin-bottom: 24px;
        }

        .aisitex-showcase-img {
            width: 100%;
            border-radius: 8px;
            border: 1px solid var(--aisitex-border);
            box-shadow: 0 8px 20px rgba(0,0,0,0.05);
        }

        /* 底部下载引流横幅区块 */
        .aisitex-download-banner {
            padding: 90px 24px;
            background: linear-gradient(135deg, #1f4278 0%, #2B579A 100%);
            color: var(--aisitex-white);
            text-align: center;
        }

        .aisitex-download-banner-inner {
            max-width: 800px;
            margin: 0 auto;
        }

        .aisitex-download-badge {
            display: inline-block;
            background-color: rgba(255,255,255,0.15);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 20px;
            letter-spacing: 1px;
        }

        .aisitex-download-banner h2 {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .aisitex-download-banner p {
            font-size: 18px;
            opacity: 0.9;
            margin-bottom: 36px;
            line-height: 1.6;
        }

        .aisitex-btn-download-lg {
            background-color: var(--aisitex-secondary);
            color: var(--aisitex-white);
            padding: 16px 36px;
            border-radius: 6px;
            font-weight: 600;
            font-size: 18px;
            display: inline-block;
            transition: background-color 0.2s, transform 0.1s;
            box-shadow: 0 8px 20px rgba(216, 59, 1, 0.3);
        }

        .aisitex-btn-download-lg:hover {
            background-color: #b53100;
            transform: translateY(-2px);
        }

        /* 页脚 */
        .aisitex-footer {
            background-color: #1a1a1a;
            color: #a0a0a0;
            padding: 50px 24px 30px;
            font-size: 14px;
        }

        .aisitex-footer-inner {
            max-width: var(--aisitex-container);
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid #333;
            padding-bottom: 30px;
            margin-bottom: 30px;
            flex-wrap: wrap;
            gap: 20px;
        }

        .aisitex-footer-brand {
            color: #ffffff;
            font-weight: 600;
            font-size: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

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

        .aisitex-footer-links a {
            color: #a0a0a0;
            transition: color 0.2s;
        }

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

        .aisitex-copyright {
            max-width: var(--aisitex-container);
            margin: 0 auto;
            text-align: center;
            color: #666;
            font-size: 13px;
        }

        /* 响应式断点 */
        @media (max-width: 968px) {
            .aisitex-hero-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .aisitex-atlas-grid {
                grid-template-columns: 1fr;
            }
            .aisitex-showcase-split {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .aisitex-hero-title {
                font-size: 36px;
            }
        }

        @media (max-width: 768px) {
            .aisitex-nav-menu {
                position: fixed;
                top: 72px;
                right: -100%;
                width: 260px;
                height: calc(100vh - 72px);
                background-color: var(--aisitex-white);
                flex-direction: column;
                align-items: flex-start;
                padding: 30px;
                gap: 20px;
                box-shadow: -4px 0 20px rgba(0,0,0,0.1);
                transition: right 0.3s ease;
                z-index: 999;
            }
            .aisitex-nav-menu.active {
                right: 0;
            }
            .aisitex-menu-toggle {
                display: block;
            }
            .aisitex-nav-overlay.active {
                display: block;
            }
            .aisitex-hero-title {
                font-size: 30px;
            }
        }

.aisitex-header {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    color: #242424;
}

.aisitex-header, .aisitex-header *{
            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-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid #E1DFDD;
        }

.aisitex-header .aisitex-header-inner{
            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: 18px;
            color: #2B579A;
        }

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

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

.aisitex-header .aisitex-nav-link{
            font-size: 15px;
            font-weight: 500;
            color: #242424;
            transition: color 0.2s ease;
            position: relative;
            padding: 6px 0;
        }

.aisitex-header .aisitex-nav-link:hover, .aisitex-header .aisitex-nav-link.active{
            color: #2B579A;
        }

.aisitex-header .aisitex-nav-link.active::after{
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: #2B579A;
        }

.aisitex-header .aisitex-menu-toggle{
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            width: 30px;
            height: 30px;
            position: relative;
        }

.aisitex-header .aisitex-menu-toggle span{
            display: block;
            width: 24px;
            height: 2px;
            background-color: #242424;
            position: absolute;
            left: 3px;
            transition: 0.3s;
        }

.aisitex-header .aisitex-menu-toggle span:nth-child(1){ top: 8px; }

.aisitex-header .aisitex-menu-toggle span:nth-child(2){ top: 14px; }

.aisitex-header .aisitex-menu-toggle span:nth-child(3){ top: 20px; }

@media (max-width: 768px){.aisitex-header .aisitex-nav-menu{
                position: fixed;
                top: 72px;
                right: -100%;
                width: 260px;
                height: calc(100vh - 72px);
                background-color: #FFFFFF;
                flex-direction: column;
                align-items: flex-start;
                padding: 30px;
                gap: 20px;
                box-shadow: -4px 0 20px rgba(0,0,0,0.1);
                transition: right 0.3s ease;
                z-index: 999;
            }

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

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

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

.aisitex-footer {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    color: #242424;
}

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

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

.aisitex-footer{
            background-color: #1a1a1a;
            color: #a0a0a0;
            padding: 50px 24px 30px;
            font-size: 14px;
        }

.aisitex-footer .aisitex-footer-inner{
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid #333;
            padding-bottom: 30px;
            margin-bottom: 30px;
            flex-wrap: wrap;
            gap: 20px;
        }

.aisitex-footer .aisitex-footer-brand{
            color: #ffffff;
            font-weight: 600;
            font-size: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

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

.aisitex-footer .aisitex-footer-links a{
            color: #a0a0a0;
            transition: color 0.2s;
        }

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

.aisitex-footer .aisitex-copyright{
            max-width: 1200px;
            margin: 0 auto;
            text-align: center;
            color: #666;
            font-size: 13px;
        }