/* --- 悬浮组件主容器 --- */
        .contact-widget-container {
            position: fixed;
            right: 30px;
            top: 50%;
            transform: translateY(-50%);
            z-index: 1000;
            /* 核心：容器尺寸=按钮尺寸，初始仅按钮可触发hover */
            width: fit-content;
        }

        /* --- 左侧白色信息卡片 --- */
        .info-card {
            position: absolute;
            /* 核心修复1：right值=按钮宽度，卡片与按钮无缝衔接，无间隙导致hover丢失 */
            right: 56px;
            top: 50%;
            transform: translateY(-50%) translateX(20px);
            background-color: #ffffff;
            border-radius: 12px;
            box-shadow: 0 10px 40px rgba(78, 141, 245, 0.1);
            padding: 25px 30px;
            width: 320px;
            
            /* 初始隐藏状态：不响应鼠标事件，不会误触发hover */
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
            transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
        }

        /* 核心修复2：鼠标悬浮容器（按钮+卡片）时，卡片持续显示 */
        .contact-widget-container:hover .info-card {
            opacity: 1;
            visibility: visible;
            transform: translateY(-50%) translateX(0);
            /* 卡片显示后开启鼠标事件，支持选中复制、点击 */
            pointer-events: auto;
        }

        /* 信息项列表 */
        .info-item {
            display: flex;
            align-items: flex-start;
            margin-bottom: 25px;
        }

        .info-item:last-child {
            margin-bottom: 0;
        }

        /* 左侧图标 */
        .info-icon {
            width: 20px;
            height: 20px;
            margin-right: 12px;
            margin-top: 2px;
            flex-shrink: 0;
            color: #333;
        }

        .info-icon svg {
            width: 100%;
            height: 100%;
            stroke: currentColor;
            stroke-width: 1.5;
            fill: none;
            stroke-linecap: round;
            stroke-linejoin: round;
        }

        /* 右侧内容区 */
        .info-content h3 {
            font-size: 16px;
            font-weight: 600;
            color: #333333;
            margin-bottom: 10px;
            letter-spacing: 0.5px;
        }

        .info-line {
            font-size: 14px;
            color: #666666;
            margin-bottom: 6px;
            display: flex;
            align-items: center;
        }

        .info-line span {
            color: #4e8df5;
            font-weight: 600;
            margin-left: 8px;
            font-family: Arial, sans-serif;
            letter-spacing: 0.5px;
        }

        .desc-text {
            font-size: 13px;
            color: #888888;
            margin-top: -2px;
        }

        /* 二维码区域 */
        .qr-box {
            width: 110px;
            height: 110px;
            margin-top: 10px;
        }
        .qr-box img {
            width: 100%;
            height: 100%;
            object-fit: contain;
        }

        /* --- 右侧蓝色触发按钮 --- */
        .trigger-btn {
            /* 核心修复3：固定按钮宽度，与卡片right值精准匹配，消除间隙 */
            width: 56px;
            background-color: #558dff;
            color: #ffffff;
            padding: 20px 0;
            border-radius: 30px;
            display: flex;
            flex-direction: column;
            align-items: center;
            cursor: pointer;
            box-shadow: -4px 8px 20px rgba(85, 141, 255, 0.3);
            transition: background-color 0.3s ease;
        }

        .trigger-btn:hover {
            background-color: #4078ea;
        }

        .trigger-icon {
            width: 22px;
            height: 22px;
            margin-bottom: 10px;
        }
        
        .trigger-icon svg {
            width: 100%;
            height: 100%;
            stroke: #fff;
            stroke-width: 1.5;
            fill: none;
        }

        .trigger-text {
            writing-mode: vertical-rl;
            letter-spacing: 4px;
            font-size: 15px;
            font-weight: 500;
        }

        /* --- 右下角返回顶部按钮 --- */
        .back-to-top {
            position: fixed;
            right: 30px;
            bottom: 40px;
            width: 50px;
            height: 50px;
            background-color: #ffffff;
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            cursor: pointer;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
            transition: all 0.3s ease;
            z-index: 999;
        }

        .back-to-top:hover {
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
            transform: translateY(-3px);
        }

        .back-to-top svg {
            width: 24px;
            height: 24px;
            stroke: #333;
            stroke-width: 1.5;
            fill: none;
            stroke-linecap: round;
            stroke-linejoin: round;
        }

        /* --- 移动端适配 --- */
        @media (max-width: 768px) {
            .info-card {
                width: 280px;
                padding: 20px;
                right: 48px;
            }
            .trigger-btn {
                width: 48px;
                padding: 15px 0;
            }
            .info-content h3 { font-size: 15px; }
            .info-line { font-size: 13px; }
            .desc-text { font-size: 12px; }
            .back-to-top { right: 15px; bottom: 20px; width: 40px; height: 40px; }
            .trigger-text { font-size: 14px; }
            .trigger-icon { width: 20px; height: 20px; }
        }