.child-post-fixed { display: none; }

@media (min-width: 1400px) {
    /* Reserve the rail inside the native layout width, including sidebar layouts. */
    .content-layout:has(> .child-post-fixed) {
        position: relative;
        padding-left: 88px;
    }
    .child-post-fixed {
        display: block;
        position: sticky;
        top: 88px;
        float: left;
        margin-left: -88px;
        width: 70px;
        height: 0;
        z-index: 99;
    }
    .child-post-fixed .pf-inner {
        background: var(--main-bg-color);
        border-radius: var(--main-radius);
        box-shadow: 0 2px 10px rgba(0,0,0,.08);
        padding: 12px;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 8px;
    }
    .child-post-fixed .pf-btn {
        width: 46px;
        height: 46px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        background: var(--muted-border-color);
        color: var(--muted-2-color);
        transition: color .3s;
        cursor: pointer;
        position: relative;
    }
    .child-post-fixed .pf-btn:hover,
    .child-post-fixed .pf-btn.actived { color: var(--focus-color); }
    .child-post-fixed .pf-btn:focus-visible { outline: 2px solid var(--focus-color); outline-offset: 3px; }
    .child-post-fixed .pf-btn > .icon { font-size: 22px; }
    .child-post-fixed .pf-btn > count,
    .child-post-fixed .pf-btn > text { display: none; }
    .child-post-fixed .pf-num {
        position: absolute;
        top: -4px;
        right: -4px;
        min-width: 18px;
        height: 18px;
        padding: 0 5px;
        font-size: 10px;
        line-height: 18px;
        text-align: center;
        color: #fff;
        background: var(--focus-color);
        border-radius: 10px;
    }
    .child-post-fixed .pf-num:empty { display: none; }
    .child-post-fixed .pf-line { width: 30px; height: 1px; background: var(--muted-border-color); margin: 4px 0; }
    .child-post-fixed .pf-share.hover-show-con {
        position: absolute !important;
        left: 58px !important;
        top: 50% !important;
        transform: translateY(-50%) !important;
        width: 60px !important;
        padding: 10px 9px !important;
        border-radius: var(--main-radius);
        box-shadow: 0 2px 12px rgba(0,0,0,.1);
    }
    .child-post-fixed .pf-share-toggle:focus-within > .pf-share { opacity: 1; visibility: visible; }
    .child-post-fixed .pf-share::before {
        content: '';
        position: absolute;
        left: -8px;
        top: 50%;
        transform: translateY(-50%);
        border: 8px solid transparent;
        border-right-color: var(--main-bg-color);
        border-left-width: 0;
    }
    .child-post-fixed .pf-share .share-btn {
        width: 42px !important;
        height: 42px !important;
        display: flex !important;
        align-items: center;
        justify-content: center;
        margin: 0 0 6px !important;
        padding: 0 !important;
    }
    .child-post-fixed .pf-share .share-btn:last-child { margin-bottom: 0 !important; }
    .child-post-fixed .pf-share .share-btn text { display: none !important; }
    .child-post-fixed .pf-share .share-btn icon { margin: 0 !important; }
}