/* 弹窗基础样式 */
        .popup {
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: white;
            padding: 20px;
            border-radius: 10px;
            box-shadow: 0 0 20px rgba(0,0,0,0.3);
            z-index: 10000;
            opacity: 0;
            transition: all 0.3s ease;
        }
        .popup.active {
            opacity: 1;
        }

        /* 关闭按钮新样式 */
        .close-btn {
            position: absolute;
            right: -15px;
            top: -15px;
            width: 30px;
            height: 30px;
            background: #ff4444;
            border-radius: 50%;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 2px 5px rgba(0,0,0,0.2);
            transition: all 0.2s;
        }
        .close-btn:hover {
            background: #ff0000;
            transform: scale(1.1);
        }
        .close-btn::before,
        .close-btn::after {
            content: '';
            position: absolute;
            width: 16px;
            height: 2px;
            background: white;
        }
        .close-btn::before {
            transform: rotate(45deg);
        }
        .close-btn::after {
            transform: rotate(-45deg);
        }

        .popup img {
            width: 300px;
            height: 400px;
            object-fit: cover;
            cursor: pointer;
        }



 /* 响应式适配 */
        @media (max-width: 768px) {
            .js-fixed-image {
                max-width: 100% !important;
                bottom: 0px !important;
            }