.index_main {
    position: relative;
    width: 100%;
    min-height: 200px;
    display: block;
    margin: 0 auto;
    overflow: hidden; 
padding-top: 50px;
}
.index_mainbox {
    position: relative;
    width: 100%;
    max-width: 1200px;
    display: block;
    margin: 0 auto;

}

.zalo-download-wrapper * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        .zalo-download-wrapper {
            background-color: #f4f7fb; /* 浅蓝色大背景 */
            padding: 60px 20px;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            display: flex;
            flex-direction: column; /* 垂直排列，为了容纳下方的多端下载区 */
            align-items: center;
        }

        /* 核心卡片容器 */
        .zalo-hero-card {
            background-color: #ffffff;
            width: 100%;
            max-width: 1200px;
            border-radius: 24px;
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.04);
            display: flex;
            overflow: hidden;
            position: relative;
        }

        /* 左侧内容区 */
        .zalo-content-area {
            flex: 1;
            padding: 80px 60px;
            z-index: 2;
        }

        .zalo-title {
            font-size: 38px;
            font-weight: 800;
            color: #1a1e23;
            line-height: 1.25;
            margin-bottom: 20px;
        }

        .zalo-desc {
            font-size: 16px;
            color: #555b66;
            line-height: 1.6;
            margin-bottom: 30px;
            max-width: 420px;
        }

        /* 特性列表 */
        .zalo-features {
            list-style: none;
            margin-bottom: 40px;
        }

        .zalo-features li {
            position: relative;
            padding-left: 28px;
            margin-bottom: 16px;
            font-size: 15px;
            color: #333;
            font-weight: 500;
        }

        /* 纯 CSS 绘制对号图标 */
        .zalo-features li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 4px;
            width: 16px;
            height: 16px;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230068ff' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E");
            background-size: contain;
            background-repeat: no-repeat;
        }

        /* 按钮组 */
        .zalo-btn-group {
            display: flex;
            gap: 15px;
            margin-bottom: 25px;
            flex-wrap: wrap;
        }

        .zalo-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: bold;
            text-decoration: none;
            transition: all 0.3s ease;
        }

        .zalo-btn svg {
            width: 18px;
            height: 18px;
            margin-right: 8px;
        }

        .zalo-btn-primary {
            background-color: #0068ff;
            color: #ffffff;
            box-shadow: 0 6px 15px rgba(0, 104, 255, 0.2);
            border: 1px solid #0068ff;
        }

        .zalo-btn-primary:hover {
            background-color: #0056e0;
            transform: translateY(-2px);
        }

        .zalo-btn-primary svg {
            fill: #ffffff;
        }

        .zalo-btn-secondary {
            background-color: #ffffff;
            color: #0068ff;
            border: 1px solid #0068ff;
        }

        .zalo-btn-secondary:hover {
            background-color: #f4f7fb;
            transform: translateY(-2px);
        }

        .zalo-btn-secondary svg {
            fill: #0068ff;
        }

        .zalo-footnote {
            font-size: 12px;
            color: #99a2ad;
        }

        /* =========================================================
           右侧插图区 (纯 CSS 绘制手机与网页视窗，完美还原图片) 
           ========================================================= */
        .zalo-illustration-area {
            flex: 1;
            position: relative;
            background-color: #f8fafc;
            border-radius: 0 24px 24px 0;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 480px;
        }

        /* 背景网页视窗 */
        .zalo-mock-browser {
            position: absolute;
            left: 40px; /* 变宽后增加间距 */
            top: 50%;
            transform: translateY(-50%);
            width: 360px; /* 变大一点 */
            height: 260px;
            background: #ffffff;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.06);
            border: 1px solid #f1f5f9;
        }

        .zalo-mock-browser-header {
            height: 40px;
            border-bottom: 1px solid #f1f5f9;
            display: flex;
            align-items: center;
            padding: 0 15px;
            color: #88afeb;
            font-weight: bold;
            font-size: 14px;
        }

        .zalo-mock-browser-body {
            padding: 20px;
            display: flex;
            gap: 15px;
        }
        
        .zalo-mock-box {
            background: #f1f5f9;
            border-radius: 6px;
            height: 20px;
            margin-bottom: 10px;
        }

        /* 前景手机模型 */
        .zalo-mock-phone {
            position: absolute;
            right: 60px; /* 变宽后增加间距 */
            width: 260px; /* 变大一点 */
            height: 520px;
            background: #1e2329; /* 手机黑边框 */
            border-radius: 36px;
            padding: 8px;
            box-shadow: 0 25px 50px rgba(0,0,0,0.15);
            z-index: 10;
        }

        .zalo-mock-phone-screen {
            background: #f1f5f9;
            width: 100%;
            height: 100%;
            border-radius: 28px;
            overflow: hidden;
            position: relative;
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        .zalo-mock-phone-header {
            width: 100%;
            height: 90px;
            background: #0068ff;
            border-radius: 0 0 12px 12px;
            margin-bottom: 20px;
        }

        .zalo-mock-bubble {
            width: 80%;
            height: 44px;
            background: #e2e8f0;
            border-radius: 8px;
            margin-bottom: 15px;
        }

        /* 悬浮图标装饰 */
        .zalo-float-icon {
            position: absolute;
            width: 56px; /* 变大一点 */
            height: 56px;
            background: #ffffff;
            border-radius: 14px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 20;
        }

        .zalo-float-doc {
            left: 20px; 
            bottom: 120px;
        }

        .zalo-float-img {
            right: 210px; /* 变宽后调整位置 */
            top: 120px;
        }

        .zalo-float-icon svg {
            width: 28px;
            height: 28px;
        }

        /* =========================================================
           多端下载区域样式 
           ========================================================= */
        .zalo-platforms-section {
            width: 100%;
            max-width: 1200px;
            margin-top: 50px;
        }

        .zalo-platforms-title {
            display: none; /* 隐藏多余的标题，更符合截图 */
        }

        .zalo-platforms-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .zalo-platform-card {
            background: #ffffff;
            border-radius: 16px;
            padding: 40px 20px;
            text-align: center;
            box-shadow: 0 4px 20px rgba(0,0,0,0.02);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            text-decoration: none;
            display: block;
        }

        .zalo-platform-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
        }

        .zalo-platform-icon {
            width: 60px;
            height: 60px;
            margin: 0 auto 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 16px;
            font-size: 28px;
        }

        /* 为不同的卡片图标定义专属浅色背景 */
        .zalo-platform-card:nth-child(1) .zalo-platform-icon { background-color: #f3f4f6; } /* 灰色 */
        .zalo-platform-card:nth-child(2) .zalo-platform-icon { background-color: #fef2f2; } /* 浅粉红 */
        .zalo-platform-card:nth-child(3) .zalo-platform-icon { background-color: #f8fafc; } /* 浅灰蓝 */
        .zalo-platform-card:nth-child(4) .zalo-platform-icon { background-color: #f0fdf4; } /* 浅绿 */

        .zalo-platform-name {
            font-size: 18px;
            font-weight: 700;
            color: #1a1e23;
            margin-bottom: 10px;
        }

        .zalo-platform-desc {
            font-size: 14px;
            color: #64748b;
        }

        /* =========================================================
           软件 APP 介绍区域与 FAQ 区域样式
           ========================================================= */
        .zalo-info-section {
            width: 100%;
            max-width: 1200px; /* 同步变宽 */
            margin-top: 60px;
            background: #ffffff;
            border-radius: 20px;
            padding: 40px;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.03);
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

        .zalo-info-block h3 {
            font-size: 22px;
            color: #1a1e23;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
        }

        .zalo-info-block h3 svg {
            width: 24px;
            height: 24px;
            margin-right: 10px;
            fill: #0068ff;
        }

        .zalo-info-block p {
            font-size: 15px;
            color: #555b66;
            line-height: 1.7;
            margin-bottom: 15px;
        }

        /* FAQ 样式 */
        .zalo-faq-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .zalo-faq-item {
            background: #f8fafc;
            border-radius: 12px;
            padding: 15px 20px;
            border-left: 4px solid #0068ff;
        }

        .zalo-faq-q {
            font-size: 16px;
            font-weight: 700;
            color: #1a1e23;
            margin-bottom: 8px;
        }

        .zalo-faq-a {
            font-size: 14px;
            color: #555b66;
            line-height: 1.6;
        }

        /* 响应式适配：手机端自动改为上下排版 */
        @media (max-width: 860px) {
            .zalo-hero-card {
                flex-direction: column;
            }
            .zalo-illustration-area {
                border-radius: 0 0 24px 24px;
                min-height: 380px;
            }
            .zalo-content-area {
                padding: 40px 30px;
            }
            .zalo-mock-phone {
                right: 50%;
                transform: translateX(50%);
            }
            .zalo-mock-browser {
                display: none; /* 手机端隐藏背后的浏览器，保持简洁 */
            }
            .zalo-float-img {
                right: 50%;
                margin-right: 80px;
            }
            .zalo-float-doc {
                display: none; /* 手机端隐藏以防重叠 */
            }
            .zalo-info-section {
                grid-template-columns: 1fr;
                padding: 30px 20px;
                gap: 30px;
            }
            .zalo-platforms-grid {
                grid-template-columns: repeat(2, 1fr); /* 手机端显示两列 */
            }
        }
        @media (max-width: 480px) {
            .zalo-platforms-grid {
                grid-template-columns: 1fr; /* 超小屏幕显示一列 */
            }
        }