:root {
            --aisitex-bg: #0f172a;
            --aisitex-card-bg: #1e293b;
            --aisitex-border: #334155;
            --aisitex-text: #f8fafc;
            --aisitex-text-muted: #94a3b8;
            --aisitex-primary: #ff7139;
            --aisitex-secondary: #0060df;
            --aisitex-accent: #38bdf8;
            --aisitex-font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            --aisitex-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
        }

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

        body {
            background-color: var(--aisitex-bg);
            color: var(--aisitex-text);
            font-family: var(--aisitex-font);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* 顶部导航组件 */
        .aisitex-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(15, 23, 42, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--aisitex-border);
        }

        .aisitex-nav-container {
            max-width: 1440px;
            margin: 0 auto;
            padding: 1rem 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .aisitex-brand {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            text-decoration: none;
            color: var(--aisitex-text);
            font-weight: 700;
            font-size: 1.25rem;
        }

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

        .aisitex-nav-menu {
            display: flex;
            gap: 2rem;
            align-items: center;
        }

        .aisitex-nav-link {
            text-decoration: none;
            color: var(--aisitex-text-muted);
            font-size: 0.95rem;
            font-weight: 500;
            transition: color 0.2s ease;
        }

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

        .aisitex-menu-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            flex-direction: column;
            gap: 5px;
        }

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

        .aisitex-nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,0.5);
            z-index: 998;
        }

        /* 主体布局 */
        main {
            max-width: 1440px;
            margin: 0 auto;
            padding: 0 2rem;
        }

        /* 首屏 Hero 样式 */
        .aisitex-hero {
            padding: 10rem 0 6rem 0;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: center;
        }

        .aisitex-hero-content h1 {
            font-size: 3.5rem;
            font-weight: 800;
            line-height: 1.15;
            margin-bottom: 1.5rem;
            letter-spacing: -0.02em;
        }

        .aisitex-hero-content p {
            font-size: 1.15rem;
            color: var(--aisitex-text-muted);
            margin-bottom: 2.5rem;
            max-width: 540px;
        }

        .aisitex-hero-actions {
            display: flex;
            gap: 1rem;
            align-items: center;
            margin-bottom: 3rem;
        }

        .aisitex-btn-primary {
            background: var(--aisitex-primary);
            color: #ffffff;
            padding: 0.85rem 2rem;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 600;
            transition: filter 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

        .aisitex-btn-primary:hover {
            filter: brightness(1.1);
        }

        .aisitex-btn-secondary {
            background: transparent;
            color: var(--aisitex-text);
            padding: 0.85rem 2rem;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 600;
            border: 1px solid var(--aisitex-border);
            transition: background 0.2s;
        }

        .aisitex-btn-secondary:hover {
            background: rgba(255, 255, 255, 0.05);
        }

        .aisitex-badges {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }

        .aisitex-badge {
            font-family: var(--aisitex-mono);
            font-size: 0.85rem;
            padding: 0.35rem 0.75rem;
            background: var(--aisitex-card-bg);
            border: 1px solid var(--aisitex-border);
            border-radius: 4px;
            color: var(--aisitex-accent);
        }

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

        .aisitex-hero-visual img {
            width: 100%;
            border-radius: 12px;
            border: 1px solid var(--aisitex-border);
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
        }

        /* 平台状态横向带 */
        .aisitex-platform-band {
            background: var(--aisitex-card-bg);
            border: 1px solid var(--aisitex-border);
            border-radius: 12px;
            padding: 2rem;
            margin-bottom: 6rem;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
        }

        .aisitex-platform-item h3 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--aisitex-primary);
        }

        .aisitex-platform-item p {
            font-size: 0.9rem;
            color: var(--aisitex-text-muted);
        }

        /* 概览矩阵模块 (Overview Matrix) */
        .aisitex-matrix-section {
            margin-bottom: 8rem;
        }

        .aisitex-section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 4rem auto;
        }

        .aisitex-section-header h2 {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }

        .aisitex-section-header p {
            color: var(--aisitex-text-muted);
            font-size: 1.1rem;
        }

        .aisitex-matrix-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
        }

        .aisitex-matrix-card {
            background: var(--aisitex-card-bg);
            border: 1px solid var(--aisitex-border);
            border-radius: 16px;
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }

        .aisitex-matrix-img {
            width: 100%;
            height: auto;
            border-bottom: 1px solid var(--aisitex-border);
        }

        .aisitex-matrix-body {
            padding: 2rem;
        }

        .aisitex-matrix-body h3 {
            font-size: 1.5rem;
            margin-bottom: 0.75rem;
        }

        .aisitex-matrix-body p {
            color: var(--aisitex-text-muted);
        }

        /* 生态横幅模块 (Ecosystem Band) */
        .aisitex-ecosystem-section {
            background: linear-gradient(135deg, rgba(0,96,223,0.1) 0%, rgba(255,113,57,0.1) 100%);
            border: 1px solid var(--aisitex-border);
            border-radius: 24px;
            padding: 4rem;
            margin-bottom: 8rem;
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 4rem;
            align-items: center;
        }

        .aisitex-ecosystem-content h2 {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }

        .aisitex-ecosystem-content > p {
            color: var(--aisitex-text-muted);
            font-size: 1.1rem;
            margin-bottom: 2.5rem;
        }

        .aisitex-eco-features {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }

        .aisitex-eco-feature-item h4 {
            font-size: 1.1rem;
            color: var(--aisitex-primary);
            margin-bottom: 0.25rem;
        }

        .aisitex-eco-feature-item p {
            font-size: 0.95rem;
            color: var(--aisitex-text-muted);
        }

        .aisitex-ecosystem-visual img {
            width: 100%;
            border-radius: 12px;
            border: 1px solid var(--aisitex-border);
        }

        /* 底部页脚 */
        .aisitex-footer {
            border-top: 1px solid var(--aisitex-border);
            padding: 4rem 0;
            margin-top: 6rem;
            color: var(--aisitex-text-muted);
            font-size: 0.9rem;
            text-align: center;
        }

        .aisitex-footer p {
            margin-bottom: 1rem;
        }

        /* 响应式适配 */
        @media (max-width: 1024px) {
            .aisitex-hero {
                grid-template-columns: 1fr;
                text-align: center;
                gap: 3rem;
            }

            .aisitex-hero-content p {
                margin: 0 auto 2.5rem auto;
            }

            .aisitex-hero-actions {
                justify-content: center;
            }

            .aisitex-badges {
                justify-content: center;
            }

            .aisitex-platform-band {
                grid-template-columns: repeat(2, 1fr);
            }

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

            .aisitex-ecosystem-section {
                grid-template-columns: 1fr;
                padding: 2.5rem;
            }
        }

        @media (max-width: 768px) {
            .aisitex-nav-menu {
                display: none;
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background: var(--aisitex-card-bg);
                flex-direction: column;
                padding: 2rem;
                border-bottom: 1px solid var(--aisitex-border);
            }

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

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

            .aisitex-hero-content h1 {
                font-size: 2.5rem;
            }

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

.aisitex-header {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #f8fafc;
}

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

.aisitex-header{
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(15, 23, 42, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid #334155;
        }

.aisitex-header .aisitex-nav-container{
            max-width: 1440px;
            margin: 0 auto;
            padding: 1rem 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

.aisitex-header .aisitex-brand{
            display: flex;
            align-items: center;
            gap: 0.75rem;
            text-decoration: none;
            color: #f8fafc;
            font-weight: 700;
            font-size: 1.25rem;
        }

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

.aisitex-header .aisitex-nav-menu{
            display: flex;
            gap: 2rem;
            align-items: center;
        }

.aisitex-header .aisitex-nav-link{
            text-decoration: none;
            color: #94a3b8;
            font-size: 0.95rem;
            font-weight: 500;
            transition: color 0.2s ease;
        }

.aisitex-header .aisitex-nav-link:hover, .aisitex-header .aisitex-nav-link.active{
            color: #ff7139;
        }

.aisitex-header .aisitex-menu-toggle{
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            flex-direction: column;
            gap: 5px;
        }

.aisitex-header .aisitex-menu-toggle span{
            display: block;
            width: 24px;
            height: 2px;
            background: #f8fafc;
            transition: 0.3s;
        }

@media (max-width: 768px){.aisitex-header .aisitex-nav-menu{
                display: none;
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background: #1e293b;
                flex-direction: column;
                padding: 2rem;
                border-bottom: 1px solid #334155;
            }

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

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

.aisitex-footer {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #f8fafc;
}

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

.aisitex-footer{
            border-top: 1px solid #334155;
            padding: 4rem 0;
            margin-top: 6rem;
            color: #94a3b8;
            font-size: 0.9rem;
            text-align: center;
        }

.aisitex-footer p{
            margin-bottom: 1rem;
        }