:root:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            --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;
        }
*:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
body:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            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;
            -webkit-font-smoothing: antialiased;
        }
/* 复用首页导航栏样式 */
/* 正文区域统一样式 */
.aisitex-container:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
/* 沉浸式首屏变体 */
.features-hero:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            padding: 60px 0 80px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
.features-hero-content:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
.features-badge:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: 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;
        }
.features-hero h1:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            font-size: 40px;
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-color);
        }
.features-hero p:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
.features-hero-steps:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            display: flex;
            flex-direction: column;
            gap: 16px;
            margin-top: 8px;
        }
.features-step-item:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            display: flex;
            align-items: flex-start;
            gap: 16px;
        }
.features-step-num:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            width: 28px;
            height: 28px;
            background: var(--primary-color);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 13px;
            flex-shrink: 0;
        }
.features-step-text h4:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            font-size: 16px;
            font-weight: 600;
            color: var(--text-color);
            margin-bottom: 2px;
        }
.features-step-text p:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            font-size: 14px;
            color: var(--text-secondary);
        }
.features-hero-media:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            position: relative;
            background: #fff;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
        }
.features-hero-media img:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            width: 100%;
            height: auto;
            display: block;
        }
/* 章节通用样式 */
.features-section:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            padding: 80px 0;
            border-top: 1px solid var(--border-color);
        }
.features-section-header:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            text-align: center;
            max-width: 700px;
            margin: 0 auto 56px;
        }
.features-section-header h2:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            font-size: 30px;
            font-weight: 700;
            color: var(--text-color);
            margin-bottom: 12px;
        }
.features-section-header p:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            font-size: 16px;
            color: var(--text-secondary);
        }
/* 期权与深度分析区块 */
.option-showcase-grid:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
.option-cards-col:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
.option-card:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            padding: 24px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: transform 0.2s, box-shadow 0.2s;
        }
.option-card:hover:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
            border-color: rgba(24, 119, 242, 0.3);
        }
.option-card h3:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            font-size: 18px;
            font-weight: 600;
            color: var(--text-color);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
.option-card h3:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *))::before {
            content: "";
            width: 8px;
            height: 8px;
            background: var(--primary-color);
            border-radius: 50%;
        }
.option-card p:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            font-size: 14px;
            color: var(--text-secondary);
        }
.option-media-col:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
.option-media-box:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            background: #fff;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }
.option-media-box img:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            width: 100%;
            height: auto;
            display: block;
        }
/* 全球知名美港股股票品牌追踪区块 */
.global-assets-grid:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
            margin-bottom: 40px;
        }
.global-asset-card:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            padding: 32px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
        }
.global-asset-card h3:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            font-size: 20px;
            font-weight: 700;
            color: var(--text-color);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
.global-asset-card h3 span:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            font-size: 12px;
            background: rgba(24, 119, 242, 0.1);
            color: var(--primary-color);
            padding: 4px 8px;
            border-radius: 4px;
            font-weight: 600;
        }
.global-asset-card p:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            font-size: 15px;
            color: var(--text-secondary);
        }
.global-assets-banner:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
.global-assets-banner img:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            width: 100%;
            height: auto;
            display: block;
        }
/* 底部下载CTA区 */
.features-cta-banner:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            background: linear-gradient(135deg, #1877F2 0%, #0052D9 100%);
            color: #fff;
            padding: 60px 24px;
            text-align: center;
            border-radius: 16px;
            margin: 60px 0 80px;
            box-shadow: 0 12px 32px rgba(24, 119, 242, 0.25);
        }
.features-cta-banner h2:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 16px;
        }
.features-cta-banner p:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            font-size: 16px;
            opacity: 0.9;
            max-width: 600px;
            margin: 0 auto 32px;
        }
.features-btn-light:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            background: #fff;
            color: var(--primary-color);
            padding: 14px 32px;
            border-radius: 8px;
            font-weight: 700;
            font-size: 16px;
            text-decoration: none;
            display: inline-block;
            box-shadow: 0 4px 16px rgba(0,0,0,0.1);
            transition: transform 0.2s, background-color 0.2s;
        }
.features-btn-light:hover:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            background: #f0f4ff;
            transform: translateY(-2px);
        }
/* 页脚样式 */
.aisitex-footer-links:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            display: flex;
            gap: 24px;
        }
.aisitex-footer-links a:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            color: #909399;
            text-decoration: none;
            transition: color 0.2s;
        }
.aisitex-footer-links a:hover:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            color: #fff;
        }
.aisitex-footer-copyright:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
            text-align: center;
            font-size: 13px;
        }
/* 响应式适配 */
@media (max-width: 992px) {.features-hero:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
                grid-template-columns: 1fr;
                padding: 40px 0;
            }
.option-showcase-grid:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
                grid-template-columns: 1fr;
            }
.global-assets-grid:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
                grid-template-columns: 1fr;
            }
.aisitex-nav-menu.active:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
.aisitex-nav-overlay.active:not(:where(.aisitex-header, .aisitex-header *, .aisitex-footer, .aisitex-footer *)){
                display: block;
            }}

.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;
            }}