wordpress-theme-aksrt/assets/css/frontend/enhancements/core-ui.css

/**
 * AKSRT Enhancements — 全局 UI 增强
 *
 * 包含：骨架屏、悬停动效、暗色过渡、滚动感知
 * 所有选择器使用 aksrt- 前缀避免冲突
 */

@keyframes aksrt-spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ============================================================
 * 1. 骨架屏加载动画
 * ============================================================ */
.aksrt-skeleton {
    background: linear-gradient(
        90deg,
        rgba(121, 121, 121, 0.08) 25%,
        rgba(121, 121, 121, 0.15) 37%,
        rgba(121, 121, 121, 0.08) 63%
    );
    background-size: 400% 100%;
    animation: aksrt-skeleton-shimmer 1.5s ease infinite;
    border-radius: 4px;
}

.aksrt-skeleton--image {
    height: 0;
    padding-bottom: 66.67%; /* 3:2 aspect ratio */
}

.aksrt-skeleton--avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.aksrt-skeleton--title {
    height: 22px;
    width: 80%;
}

.aksrt-skeleton--text {
    height: 16px;
    width: 100%;
}

.aksrt-skeleton--text-short {
    height: 16px;
    width: 60%;
}

.aksrt-skeleton--button {
    height: 36px;
    width: 100px;
    border-radius: 8px;
}

@keyframes aksrt-skeleton-shimmer {
    0% { background-position: 100% 50%; }
    100% { background-position: 0 50%; }
}

/* 骨架屏组合：文章卡片骨架 */
.aksrt-skeleton-card {
    background: var(--surface-1, #fff);
    border: 1px solid var(--color-line);
    border-radius: 12px;
    overflow: hidden;
    padding: 0;
}

.aksrt-skeleton-card .aksrt-skeleton--image {
    border-radius: 0;
}

.aksrt-skeleton-card__body {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* ============================================================
 * 2. 悬停交互动效
 * ============================================================ */

/* 卡片放大 */
.aksrt-hover-zoom {
    transition: transform 0.3s ease;
}

.aksrt-hover-zoom:hover {
    transform: scale(1.02);
}

/* 卡片轻微放大 */
.aksrt-hover-zoom-sm {
    transition: transform 0.3s ease;
}

.aksrt-hover-zoom-sm:hover {
    transform: scale(1.02);
}

/* 悬停显示内容 */
.aksrt-hover-show {
    position: relative;
}

.aksrt-hover-show__content {
    position: absolute;
    opacity: 0;
    visibility: hidden;
    transform: translateY(6px);
    transition: opacity 0.3s, transform 0.3s, visibility 0.3s;
    z-index: 10;
}

.aksrt-hover-show:hover .aksrt-hover-show__content {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* 关闭按钮旋转 */
.aksrt-ic-close {
    transition: transform 0.3s;
    cursor: pointer;
}

.aksrt-ic-close:hover {
    transform: rotate(270deg);
}

/* 图片悬停缩放（缩略图容器） */
.aksrt-hover-zoom-img img {
    transition: transform 0.3s ease;
}

.aksrt-hover-zoom-img:hover img {
    transform: scale(1.02);
}

.aksrt-hover-zoom-img-sm img {
    transition: transform 0.3s ease;
}

.aksrt-hover-zoom-img-sm:hover img {
    transform: scale(1.02);
}

/* 按钮悬停上浮 */
.aksrt-hover-lift {
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.aksrt-hover-lift:hover {
    transform: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* ============================================================
 * 3. 暗色模式过渡 (View Transitions API)
 * ============================================================ */
::view-transition-old(root),
::view-transition-new(root) {
    animation: none;
    mix-blend-mode: normal;
}

.dark::view-transition-old(root),
body.dark-theme::view-transition-old(root) {
    z-index: 1;
}

.dark::view-transition-new(root),
body.dark-theme::view-transition-new(root) {
    z-index: 2147483646;
}

::view-transition-old(root) {
    z-index: 2147483646;
}

::view-transition-new(root) {
    z-index: 1;
}

/* backdrop-filter 不支持时的降级 */
@supports not ((-webkit-backdrop-filter: blur(20px)) or (backdrop-filter: blur(20px))) {
    :root {
        --aksrt-blur-bg: #ffffff;
    }

    .dark {
        --aksrt-blur-bg: var(--surface-1);
    }

}

/* ============================================================
 * 4. 滚动方向感知
 * ============================================================ */

/* 向下滚动时隐藏导航栏 */
body.aksrt-scroll-down .site-nav.nav-scroll-hide {
    transform: translateY(-100%);
    transition: transform 0.3s ease;
}

body.aksrt-scroll-up .site-nav.nav-scroll-hide {
    transform: translateY(0);
    transition: transform 0.3s ease;
}

/* 滚动时隐藏浮动按钮 */
body.aksrt-scrolling .aksrt-floating-right.scrolling-hide {
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
}

/* body-scroll 状态类 */
body.aksrt-body-scroll .aksrt-show-on-scroll {
    opacity: 1;
    visibility: visible;
}

.aksrt-show-on-scroll {
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
}

/* ============================================================
 * 5. 图片灯箱
 * ============================================================ */
[data-aksrt-lightbox="1"] img:not(.no-imgbox):not(.no-lightbox),
.aksrt-lightbox-trigger img:not(.no-imgbox):not(.no-lightbox),
.imgbox-container img:not(.no-imgbox):not(.no-lightbox),
.comment-content .box-img {
    cursor: zoom-in;
}

.aksrt-lightbox {
    --imgbox-origin-left: 50vw;
    --imgbox-origin-top: 50vh;
    position: fixed;
    inset: 0;
    z-index: 100000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.88);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

.aksrt-lightbox.is-open {
    opacity: 1;
    visibility: visible;
}

.aksrt-lightbox__stage {
    position: absolute;
    inset: 64px 72px 82px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.aksrt-lightbox__img {
    display: block;
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    transform: scale(1);
    transform-origin: center;
    transition: transform 0.25s ease, opacity 0.2s ease;
    cursor: zoom-in;
    user-select: none;
    -webkit-user-drag: none;
}

.aksrt-lightbox.from-origin.is-open .aksrt-lightbox__img {
    animation: aksrt-lightbox-enter 0.3s ease both;
}

.aksrt-lightbox.is-zoomed .aksrt-lightbox__img {
    cursor: zoom-out;
}

.aksrt-lightbox__toolbar {
    position: absolute;
    z-index: 3;
    top: 14px;
    right: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.aksrt-lightbox__tool,
.aksrt-lightbox__nav {
    border: 0;
    background: rgba(255, 255, 255, 0.14);
    color: #fff;
    box-shadow: none;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.2s ease;
}

.aksrt-lightbox__tool {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    padding: 0;
    border-radius: 999px;
    font-size: 16px;
}

.aksrt-lightbox__tool:hover,
.aksrt-lightbox__tool:focus-visible,
.aksrt-lightbox__nav:hover,
.aksrt-lightbox__nav:focus-visible {
    background: rgba(255, 255, 255, 0.28);
    color: #fff;
}

.aksrt-lightbox__tool:focus-visible,
.aksrt-lightbox__nav:focus-visible,
.aksrt-lightbox__thumb:focus-visible {
    outline: 2px solid #fff;
    outline-offset: 2px;
}

.aksrt-lightbox__counter {
    min-width: 48px;
    color: rgba(255, 255, 255, 0.84);
    font-size: 14px;
    text-align: center;
}

.aksrt-lightbox__nav {
    position: absolute;
    z-index: 2;
    top: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 999px;
    font-size: 22px;
    transform: translateY(-50%);
}

.aksrt-lightbox__nav--prev {
    left: 16px;
}

.aksrt-lightbox__nav--next {
    right: 16px;
}

.aksrt-lightbox__caption {
    position: absolute;
    z-index: 2;
    right: 20px;
    bottom: 18px;
    left: 20px;
    color: rgba(255, 255, 255, 0.88);
    font-size: 14px;
    line-height: 1.6;
    text-align: center;
    pointer-events: none;
}

.aksrt-lightbox__thumbs {
    position: absolute;
    z-index: 3;
    right: 50%;
    bottom: 18px;
    display: flex;
    gap: 8px;
    max-width: min(70vw, 760px);
    padding: 6px;
    overflow-x: auto;
    border-radius: 8px;
    background: rgba(0, 0, 0, 0.38);
    transform: translateX(50%);
    scrollbar-width: thin;
}

.aksrt-lightbox__thumb {
    flex: 0 0 auto;
    width: 56px;
    height: 44px;
    padding: 0;
    overflow: hidden;
    border: 2px solid transparent;
    border-radius: 5px;
    background: transparent;
    opacity: 0.6;
    cursor: pointer;
}

.aksrt-lightbox__thumb.is-active {
    border-color: #fff;
    opacity: 1;
}

.aksrt-lightbox__thumb img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.aksrt-lightbox__thumbs:not([hidden]) ~ .aksrt-lightbox__caption {
    bottom: 78px;
}

.aksrt-lightbox [hidden] {
    display: none !important;
}

@keyframes aksrt-lightbox-enter {
    from {
        transform-origin: var(--imgbox-origin-left) var(--imgbox-origin-top);
        transform: scale(0.82);
        opacity: 0;
    }
    to {
        transform-origin: center;
        transform: scale(1);
        opacity: 1;
    }
}

@media (max-width: 767px) {
    .aksrt-lightbox__stage {
        inset: 58px 10px 78px;
    }

    .aksrt-lightbox__toolbar {
        top: 10px;
        right: 10px;
        gap: 5px;
    }

    .aksrt-lightbox__tool {
        width: 34px;
        height: 34px;
        font-size: 14px;
    }

    .aksrt-lightbox__counter {
        min-width: 36px;
        font-size: 12px;
    }

    .aksrt-lightbox__nav {
        width: 40px;
        height: 40px;
        font-size: 18px;
        background: rgba(0, 0, 0, 0.34);
    }

    .aksrt-lightbox__nav--prev {
        left: 8px;
    }

    .aksrt-lightbox__nav--next {
        right: 8px;
    }

    .aksrt-lightbox__thumbs {
        max-width: calc(100vw - 20px);
    }
}