/* ----- 右侧悬浮按钮区域 ----- */
        #csf-float-box {
            position: fixed;
            right: 20px;
            top: 50%;
            transform: translateY(-50%);
            z-index: 9999;
        }

        .csf-float-btn {
            margin-bottom: 12px;
            cursor: pointer;
        }

        .csf-float-btn img {
            width: 60px;
            height: 60px;
        }

        /* ----- 遮罩层 ----- */
        #csf-popup-overlay {
            position: fixed;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,0.3);
            display: none;
            z-index: 9998;
        }

        /* ----- 弹窗 ----- */
        #csf-popup {
            position: fixed;
            top: 50%;
            right: 110px;
            transform: translateY(-50%);
            width: 260px;
            background: #fff;
            padding: 20px;
            border-radius: 12px;
            box-shadow: 0 0 20px rgba(0,0,0,0.2);
            display: none;
            z-index: 9999;
        }

        #csf-popup h3 {
            text-align: center;
            margin-bottom: 15px;
        }

        .csf-qr {
            width: 100%;
            margin-bottom: 15px;
        }

        .csf-close-btn {
            position: absolute;
            right: 12px;
            top: 8px;
            font-size: 24px;
            cursor: pointer;
        }

        .csf-copy-btn, .csf-download-btn {
            width: 100%;
            padding: 10px 0;
            margin-top: 10px;
            border-radius: 6px;
            border: none;
            cursor: pointer;
            font-size: 16px;
        }

        .csf-copy-btn {
            background: #3498db;
            color: white;
        }

        .csf-download-btn {
            background: #27ae60;
            color: white;
        }