/* 全局初始化 */
        * {
            box-sizing: border-box;
        }

        html,
        body {
            margin: 0;
            padding: 0;
            width: 100%;
            min-height: 100%;
            background: #000;
            font-family: Arial, sans-serif;
        }

        img {
            display: block;
            border: 0;
        }

        /* 页面主体容器 */
        .page {
            width: 100%;
            max-width: 750px;
            margin: 0 auto;
            position: relative;
            min-height: 100vh;
            background: #000;
            overflow: hidden;
        }

        /* 最底层背景图 */
        .bottom-bg-img {
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: auto;
            z-index: 0;
            pointer-events: none;
        }

        /* 顶部悬浮栏 */
        .top-bar {
            position: fixed;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 100%;
            max-width: 750px;
            height: 80px;
            z-index: 999;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 12px;
            background: transparent;
            pointer-events: none;
        }

        /* 顶部左侧 LOGO */
        .top-left {
            height: 80px;
            display: flex;
            align-items: center;
            pointer-events: auto;
        }

        .top-left img {
            max-height: 60px;
            max-width: 180px;
        }

        /* 顶部右侧按钮 */
        .top-right {
            display: flex;
            align-items: center;
            gap: 30px;
            position: relative;
            right: 30px;
            pointer-events: auto;
        }

        .top-btn,
        .top-btn img {
            height: 70px;
            width: auto;
            object-fit: contain;
        }

        /* 中间内容容器 */
        .bg-wrap {
            width: 100%;
            position: relative;
            z-index: 1;
            font-size: 0;
            line-height: 0;
        }

        .bg-wrap > img {
            width: 100%;
            height: auto;
            margin: 0;
            padding: 0;
        }

        /* 底部悬浮按钮栏 */
        .bottom-bar {
            position: fixed;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 100%;
            max-width: 750px;
            height: 80px;
            z-index: 999;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 30px;
            background: transparent;
            pointer-events: none;
        }

        .bottom-img-btn {
            height: 50px;
            pointer-events: auto;
        }

        .bottom-img-btn img {
            height: 50px;
            width: auto;
            object-fit: contain;
        }

        /* PC 端宽度限制 */
        @media (min-width: 769px) {
            .page,
            .top-bar,
            .bottom-bar {
                max-width: 480px;
            }
        }

        /* PC 端二维码 */
        .pc-qrcode-box {
            display: none;
            position: fixed;
            top: 100px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 9999;
            padding: 10px;
            background: #fff;
            border-radius: 8px;
            text-align: center;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
        }

        #pcQrcode {
            width: 150px;
            height: 150px;
        }

        .pc-qrcode-text {
            margin-top: 6px;
            font-size: 14px;
            color: #333;
            line-height: 20px;
        }

        /* 顶部横向无限滚动图 */
        .scroll-bg {
            width: 100%;
            height: 300px;
            margin-top: 80px;
            overflow: hidden;
            position: relative;
            z-index: 1;
        }

        .scroll-track {
            display: flex;
            width: max-content;
            height: 100%;
            animation: scrollLeft 18s linear infinite;
        }

        .scroll-track img {
            height: 100%;
            width: auto;
            flex-shrink: 0;
        }

        @keyframes scrollLeft {
            0% {
                transform: translateX(0);
            }

            100% {
                transform: translateX(-50%);
            }
        }

        /* 普通底图 */
        .bg-img {
            width: 100%;
            height: auto;
            position: relative;
        }

        .bg-img-1 {
            z-index: 2;
        }

        .bg-img-2 {
            z-index: 3;
        }

        .bg-img-3 {
            z-index: 4;
        }

        /* 四宫格横向轮播大框 */
        .four-row-slider {
            width: calc(100% - 30px);
            height: 180px;
            margin: 20px auto 20px;
            padding: 55px 10px 10px;
            background-size: 100% 100%;
            background-repeat: no-repeat;
            background-position: center;
            overflow: hidden;
            position: relative;
            z-index: 5;
        }

        /* 新增轮播背景 */
        .four-row-slider-1 {
            margin-top: 0px;
            margin-bottom: 0px;
            background-image: var(--slider-bg-1);
        }

        /* 原来的轮播背景 */
        .four-row-slider-2 {
            margin-top: 20px;
            margin-bottom: 0px;
            background-image: var(--slider-bg-2);
        }

        /* 轮播裁切层 */
        .four-row-mask {
            width: 100%;
            overflow: hidden;
            position: relative;
            z-index: 2;
        }

        /* 轮播轨道 */
        .four-row-track {
            display: flex;
            gap: 8px;
            position: relative;
            z-index: 2;
            transition: transform 0.45s ease;
            will-change: transform;
        }

        /* 单个小图框 */
        .small-pic-box {
            flex: 0 0 calc((100% - 24px) / 4);
            height: 120px;
            overflow: hidden;
            border-radius: 8px;
            background: #111;
        }

        .small-pic-box img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* 底部预留空白，防止内容被底部按钮挡住 */
        .bottom-space {
            width: 100%;
            height: 80px;
        }