* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            padding: 10px;
            padding-top: 0;          /* 由 JS 动态计算，避免硬编码导致遮挡 */
            padding-bottom: calc(56px + 10px); /* 底栏高度 + 原 padding */
            font-family: Arial, sans-serif;
            background: #f5f5f5;

        /* ===== 底部 Tab 栏 ===== */
        .bottom-tabbar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: 56px;
            background: #fff;
            border-top: 1px solid #e8e8e8;
            display: flex;
            z-index: 900;
            box-shadow: 0 -2px 8px rgba(0,0,0,0.07);
        }
        .tab-item {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            color: #999;
            font-size: 10px;
            gap: 2px;
            transition: color 0.2s;
            -webkit-tap-highlight-color: transparent;
            position: relative;
        }
        .tab-item.active {
            color: #0088ff;
        }
        .tab-item svg {
            width: 22px;
            height: 22px;
        }
        .tab-item .tab-badge {
            position: absolute;
            top: 4px;
            right: calc(50% - 18px);
            background: #ff4d4f;
            color: #fff;
            font-size: 10px;
            min-width: 16px;
            height: 16px;
            line-height: 16px;
            padding: 0 4px;
            border-radius: 8px;
            text-align: center;
            display: none;
        }