/* 顶部导航：随机访问文章入口。 */
.navbar-top .zibll-child-random-article {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin: 0 3px 0 8px;
    padding: 7px 8px;
    color: var(--main-color, #555);
    font-size: 16px;
    line-height: 1;
    text-decoration: none;
    transition: color .35s cubic-bezier(.16, 1, .3, 1);
}

.navbar-top .zibll-child-random-article:hover,
.navbar-top .zibll-child-random-article:focus-visible {
    color: var(--theme-color, #2997f7);
}

.navbar-top .zibll-child-random-article:focus-visible {
    outline: none;
}

.navbar-top .zibll-child-random-article > .fa {
    display: block;
    transform-origin: 42% 58%;
    will-change: transform;
}

.navbar-top .zibll-child-random-article:hover > .fa,
.navbar-top .zibll-child-random-article:focus-visible > .fa {
    animation: zibll-child-plane-fly 1.8s cubic-bezier(.45, 0, .25, 1) infinite;
}

@keyframes zibll-child-plane-fly {
    0%,
    100% {
        transform: translate3d(0, 0, 0) rotate(0deg);
    }

    48% {
        transform: translate3d(2px, -2px, 0) rotate(-6deg);
    }

    68% {
        transform: translate3d(3px, -1px, 0) rotate(-3deg);
    }
}

.zibll-child-random-article-tooltip {
    position: absolute;
    z-index: 101;
    top: calc(100% + 8px);
    left: 50%;
    width: max-content;
    max-width: 200px;
    padding: 7px 10px;
    border-radius: 6px;
    background: var(--main-bg-color, #fff);
    box-shadow: 0 7px 20px rgba(0, 0, 0, .15);
    color: var(--main-color, #333);
    font-size: 12px;
    line-height: 1.35;
    opacity: 0;
    pointer-events: none;
    transform: translate(-50%, -10px) scale(.96);
    transform-origin: center top;
    transition: opacity .2s ease, transform .46s cubic-bezier(.16, 1, .3, 1), visibility .2s ease;
    visibility: hidden;
    white-space: nowrap;
}

.zibll-child-random-article-tooltip::after {
    position: absolute;
    bottom: 100%;
    left: 50%;
    width: 0;
    height: 0;
    border: 5px solid transparent;
    border-bottom-color: var(--main-bg-color, #fff);
    content: '';
    transform: translateX(-50%);
}

.navbar-top .zibll-child-random-article:hover .zibll-child-random-article-tooltip,
.navbar-top .zibll-child-random-article:focus-visible .zibll-child-random-article-tooltip {
    opacity: 1;
    transform: translate(-50%, 0) scale(1);
    visibility: visible;
}

@media (prefers-reduced-motion: reduce) {
    .navbar-top .zibll-child-random-article,
    .zibll-child-random-article-tooltip {
        transition: none;
    }

    .navbar-top .zibll-child-random-article:hover > .fa,
    .navbar-top .zibll-child-random-article:focus-visible > .fa {
        animation: none;
    }
}