:root {
            --aisitex-primary: #FF7139;
            --aisitex-primary-hover: #E05A25;
            --aisitex-secondary: #0C0C0D;
            --aisitex-bg: #FAFAFC;
            --aisitex-text: #202023;
            --aisitex-text-muted: #62626A;
            --aisitex-border: #E1E1E6;
            --aisitex-white: #FFFFFF;
            --aisitex-max-width: 1200px;
        }

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

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

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

        /* 顶部导航栏 */
        .aisitex-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: rgba(250, 250, 252, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--aisitex-border);
        }

        .aisitex-header-container {
            max-width: var(--aisitex-max-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 76px;
            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;
            object-fit: contain;
        }

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

        .aisitex-nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--aisitex-text-muted);
            transition: color 0.2s;
            position: relative;
            padding: 4px 0;
        }

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

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

        .aisitex-header-cta {
            background-color: var(--aisitex-primary);
            color: var(--aisitex-white);
            padding: 10px 22px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 14px;
            transition: background-color 0.2s, transform 0.1s;
        }

        .aisitex-header-cta:hover {
            background-color: var(--aisitex-primary-hover);
        }

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

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

        /* 移动端菜单遮罩 */
        .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;
        }

        /* 首屏舞台 */
        .aisitex-hero {
            background-color: var(--aisitex-secondary);
            color: var(--aisitex-white);
            padding: 90px 24px 100px;
            overflow: hidden;
            position: relative;
        }

        .aisitex-hero-container {
            max-width: var(--aisitex-max-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1fr 1.1fr;
            gap: 60px;
            align-items: center;
        }

        .aisitex-hero-content h1 {
            font-size: clamp(36px, 4vw, 52px);
            font-weight: 800;
            line-height: 1.15;
            margin-bottom: 24px;
            letter-spacing: -0.02em;
        }

        .aisitex-hero-content p {
            font-size: 18px;
            color: #A1A1A6;
            margin-bottom: 36px;
            line-height: 1.6;
        }

        .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: 16px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 16px;
            transition: all 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 8px 24px rgba(255, 113, 57, 0.3);
        }

        .aisitex-btn-primary:hover {
            background-color: var(--aisitex-primary-hover);
            transform: translateY(-2px);
        }

        .aisitex-btn-secondary {
            background-color: rgba(255, 255, 255, 0.1);
            color: var(--aisitex-white);
            padding: 16px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 16px;
            transition: background-color 0.2s;
        }

        .aisitex-btn-secondary:hover {
            background-color: rgba(255, 255, 255, 0.18);
        }

        .aisitex-hero-stage-img {
            position: relative;
            border-radius: 20px;
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.12);
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
            background: #1A1A1D;
        }

        .aisitex-hero-stage-img img {
            width: 100%;
            height: auto;
            display: block;
        }

        /* 主体短章节流 */
        .aisitex-section {
            padding: 100px 24px;
            max-width: var(--aisitex-max-width);
            margin: 0 auto;
        }

        .aisitex-section-alt {
            background-color: var(--aisitex-white);
            border-top: 1px solid var(--aisitex-border);
            border-bottom: 1px solid var(--aisitex-border);
            width: 100%;
        }

        .aisitex-section-alt-inner {
            max-width: var(--aisitex-max-width);
            margin: 0 auto;
            padding: 100px 24px;
        }

        .aisitex-chapter-grid {
            display: grid;
            grid-template-columns: 1fr 1.1fr;
            gap: 60px;
            align-items: center;
        }

        .aisitex-chapter-grid.reverse {
            grid-template-columns: 1.1fr 1fr;
        }

        .aisitex-chapter-grid.reverse .aisitex-chapter-text {
            order: 2;
        }

        .aisitex-chapter-grid.reverse .aisitex-chapter-media {
            order: 1;
        }

        .aisitex-chapter-tag {
            font-size: 14px;
            font-weight: 700;
            color: var(--aisitex-primary);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 12px;
            display: inline-block;
        }

        .aisitex-chapter-text h2 {
            font-size: clamp(28px, 3vw, 38px);
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: -0.01em;
        }

        .aisitex-chapter-text p {
            font-size: 16px;
            color: var(--aisitex-text-muted);
            margin-bottom: 28px;
            line-height: 1.7;
        }

        .aisitex-feature-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .aisitex-feature-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
        }

        .aisitex-feature-item svg {
            width: 22px;
            height: 22px;
            color: var(--aisitex-primary);
            flex-shrink: 0;
            margin-top: 2px;
        }

        .aisitex-feature-item div h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 4px;
            color: var(--aisitex-text);
        }

        .aisitex-feature-item div p {
            font-size: 14px;
            color: var(--aisitex-text-muted);
            margin-bottom: 0;
        }

        .aisitex-chapter-media {
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--aisitex-border);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.06);
            background: var(--aisitex-white);
        }

        .aisitex-chapter-media img {
            width: 100%;
            height: auto;
            display: block;
        }

        /* 隐私对照区 */
        .aisitex-privacy-box {
            background: linear-gradient(135deg, #121215 0%, #1F1F24 100%);
            color: var(--aisitex-white);
            border-radius: 24px;
            padding: 60px;
            position: relative;
            overflow: hidden;
        }

        .aisitex-privacy-header {
            max-width: 600px;
            margin-bottom: 40px;
        }

        .aisitex-privacy-header h2 {
            font-size: clamp(28px, 3vw, 38px);
            font-weight: 800;
            margin-bottom: 16px;
        }

        .aisitex-privacy-header p {
            color: #A1A1A6;
            font-size: 16px;
        }

        .aisitex-privacy-columns {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .aisitex-privacy-card {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 16px;
            padding: 30px;
        }

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

        .aisitex-privacy-card p {
            color: #A1A1A6;
            font-size: 15px;
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* 页末强转化 CTA */
        .aisitex-cta-footer {
            background-color: var(--aisitex-secondary);
            color: var(--aisitex-white);
            padding: 100px 24px;
            text-align: center;
        }

        .aisitex-cta-container {
            max-width: 700px;
            margin: 0 auto;
        }

        .aisitex-cta-container h2 {
            font-size: clamp(32px, 4vw, 44px);
            font-weight: 800;
            margin-bottom: 20px;
            letter-spacing: -0.02em;
        }

        .aisitex-cta-container p {
            font-size: 18px;
            color: #A1A1A6;
            margin-bottom: 40px;
            line-height: 1.6;
        }

        /* 底部版权信息 */
        .aisitex-footer {
            background-color: #080809;
            color: #8E8E93;
            padding: 60px 24px 40px;
            border-top: 1px solid #1C1C1E;
        }

        .aisitex-footer-container {
            max-width: var(--aisitex-max-width);
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 14px;
        }

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

        .aisitex-footer-links a:hover {
            color: var(--aisitex-white);
        }

        /* 响应式适配 */
        @media (max-width: 968px) {
            .aisitex-hero-container,
            .aisitex-chapter-grid,
            .aisitex-chapter-grid.reverse {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .aisitex-chapter-grid.reverse .aisitex-chapter-text {
                order: 1;
            }

            .aisitex-chapter-grid.reverse .aisitex-chapter-media {
                order: 2;
            }

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

            .aisitex-nav {
                display: none;
                position: fixed;
                top: 76px;
                left: 0;
                width: 100%;
                background-color: var(--aisitex-white);
                flex-direction: column;
                padding: 30px;
                box-shadow: 0 20px 30px rgba(0,0,0,0.1);
                border-bottom: 1px solid var(--aisitex-border);
                gap: 20px;
                z-index: 999;
            }

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

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

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

            .aisitex-header-cta {
                display: none;
            }
        }

.aisitex-header {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #202023;
}

.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(250, 250, 252, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid #E1E1E6;
        }

.aisitex-header .aisitex-header-container{
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            height: 76px;
            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: #0C0C0D;
        }

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

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

.aisitex-header .aisitex-nav-link{
            font-size: 15px;
            font-weight: 500;
            color: #62626A;
            transition: color 0.2s;
            position: relative;
            padding: 4px 0;
        }

.aisitex-header .aisitex-nav-link:hover, .aisitex-header .aisitex-nav-link.active{
            color: #0C0C0D;
        }

.aisitex-header .aisitex-nav-link.active::after{
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: #FF7139;
            border-radius: 2px;
        }

.aisitex-header .aisitex-header-cta{
            background-color: #FF7139;
            color: #FFFFFF;
            padding: 10px 22px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 14px;
            transition: background-color 0.2s, transform 0.1s;
        }

.aisitex-header .aisitex-header-cta:hover{
            background-color: #E05A25;
        }

.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-color: #0C0C0D;
            margin: 5px 0;
            transition: 0.3s;
        }

@media (max-width: 968px){.aisitex-header .aisitex-nav{
                display: none;
                position: fixed;
                top: 76px;
                left: 0;
                width: 100%;
                background-color: #FFFFFF;
                flex-direction: column;
                padding: 30px;
                box-shadow: 0 20px 30px rgba(0,0,0,0.1);
                border-bottom: 1px solid #E1E1E6;
                gap: 20px;
                z-index: 999;
            }

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

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

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

.aisitex-header .aisitex-header-cta{
                display: none;
            }}

.aisitex-footer {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #202023;
}

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

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

.aisitex-footer{
            background-color: #080809;
            color: #8E8E93;
            padding: 60px 24px 40px;
            border-top: 1px solid #1C1C1E;
        }

.aisitex-footer .aisitex-footer-container{
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 14px;
        }

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

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