/* 占位沿用文章卡片的外框与主色，接口完成后只替换内容，避免页面先空白再跳动。 */
.blog-skeleton-block,
.blog-skeleton-line {
    display: block;
    background: linear-gradient(100deg, #e5ebf0 20%, #f6f9fc 38%, #e5ebf0 56%);
    background-size: 220% 100%;
    animation: blog-skeleton-shimmer 1.35s ease-in-out infinite;
}
.blog-skeleton-line { height: 12px; border-radius: 999px; }
@keyframes blog-skeleton-shimmer { to { background-position: -220% 0; } }
.blog-skeleton-card { pointer-events: none; min-height: 166px; }
.blog-skeleton-card:hover { box-shadow: 0 2px 5px 0 rgba(146, 146, 146, .1); }
.blog-skeleton-card .blogpic { height: 115px; }
/* 真实文章有无封面两种排布：无封面仍由左侧栏占位，标题不会跳到卡片最左边。 */
.blog-skeleton-card--cover { min-height: 170px; }
.blog-skeleton-card--cover .blogpic { height: 130px; background: linear-gradient(100deg, #e5ebf0 20%, #f6f9fc 38%, #e5ebf0 56%); background-size: 220% 100%; animation: blog-skeleton-shimmer 1.35s ease-in-out infinite; }
.blog-skeleton-category { position: absolute; top: 0; left: 0; width: 80px; height: 30px; border-radius: 0; background: linear-gradient(100deg, #a8d2f3 20%, #d8ecfb 38%, #a8d2f3 56%); }
.blog-skeleton-card .blogtitle { padding-top: 3px; }
.blog-skeleton-title { width: 66%; height: 22px; }
.blog-skeleton-mobile-title { display: none; }
.blog-skeleton-card .blogtext { display: grid; align-content: start; gap: 12px; padding-top: 8px; }
.blog-skeleton-card .blogtext .blog-skeleton-line { width: 80%; height: 11px; }
.blog-skeleton-card .blogtext .blog-skeleton-short { width: 60%; }
.blog-skeleton-card .bloginfo { position: absolute; bottom: 20px; left: 20px; right: 20px; display: flex; align-items: flex-end; padding: 0; min-height: 28px; }
.blog-skeleton-meta { display: flex; gap: 10px; align-items: center; }
.blog-skeleton-meta .blog-skeleton-line { width: 52px; height: 10px; }
.blog-skeleton-meta .blog-skeleton-line:first-child { width: 98px; }
.blog-skeleton-button { width: 82px; height: 28px; margin-left: auto; border-radius: 0; background: linear-gradient(100deg, #a8d2f3 20%, #d8ecfb 38%, #a8d2f3 56%); }
.blog-skeleton-detail { min-height: calc(100vh - 95px); }
.blog-skeleton-detail-title { width: 62%; height: 22px; margin-bottom: 14px; }
.blog-skeleton-detail-original { display: inline-block; width: 40px; height: 22px; margin-right: 10px; background: #a8d2f3; }
.blog-skeleton-detail-meta { display: inline-block; width: 45%; height: 12px; margin-bottom: 2px; }
.blog-skeleton-detail-body { margin-top: 25px; }
.blog-skeleton-paragraph { display: grid; gap: 12px; margin: 22px 0 32px; }
.blog-skeleton-paragraph .blog-skeleton-short { width: 72%; }
.blog-skeleton-detail-heading { width: 38%; height: 20px; margin: 36px 0 20px; }
.blog-skeleton-detail-code { width: 100%; height: 145px; border-radius: 5px; }
.blog-skeleton-detail-actions { display: flex; justify-content: center; gap: 20px; margin: 35px 0 12px; }
.blog-skeleton-detail-actions .blog-skeleton-block { width: 95px; height: 38px; border-radius: 5px; }
.blog-skeleton-comments { min-height: 400px; }
.blog-skeleton-comment-title { width: 75px; height: 16px; margin-bottom: 20px; }
.blog-skeleton-comment-fields { display: flex; gap: 14px; margin-bottom: 18px; }
.blog-skeleton-comment-fields .blog-skeleton-block { flex: 1; height: 34px; border-radius: 4px; }
.blog-skeleton-comment-editor { height: 150px; border-radius: 4px; }
.blog-skeleton-comment-button { width: 85px; height: 34px; margin: 12px 0 18px; border-radius: 4px; background: #a8d2f3; }
.blog-skeleton-comment-row { display: flex; gap: 12px; margin: 20px 0; }
.blog-skeleton-comment-avatar { flex: 0 0 44px; height: 44px; border-radius: 50%; }
.blog-skeleton-comment-row > div { flex: 1; display: grid; align-content: start; gap: 10px; }
.blog-skeleton-comment-row .blog-skeleton-line:first-child { width: 25%; }
.blog-skeleton-comment-row .blog-skeleton-short { width: 65%; }
.blog-skeleton-toc-title { width: 42px; height: 19px; margin: 10px 0 22px; }
.blog-skeleton-toc-list { display: grid; gap: 16px; padding: 0 4px 12px; }
.blog-skeleton-toc-list .blog-skeleton-line { width: 82%; height: 12px; }
.blog-skeleton-toc-list .blog-skeleton-toc-subitem { width: 64%; margin-left: 16px; }
.blog-boot-detail { display: none; }
.blog-boot-article .blog-boot-list { display: none; }
.blog-boot-article .blog-boot-detail { display: block; }

/* 启动占位使用与正式页面相同的背景和固定导航位置，避免数据到达时整屏换色、整体下移。 */
.blog-startup { min-height: 100vh; background: url('../img/bg.jpg') center center / cover fixed; }
.blog-startup-header { position: fixed; top: 0; left: 0; width: 100%; height: 55px; z-index: 9999; background: #fff; }
.blog-startup-nav { height: 55px; display: flex; align-items: center; }
.blog-startup-brand { display: flex; gap: 4px; }
.blog-startup-brand .blog-skeleton-block { width: 44px; height: 44px; border-radius: 8px; }
.blog-startup-links { display: flex; align-items: center; gap: 22px; margin-left: auto; }
.blog-startup-links .blog-skeleton-line { width: 55px; height: 15px; }
.blog-startup-links .blog-skeleton-line:nth-child(4), .blog-startup-links .blog-skeleton-line:nth-child(5) { width: 70px; }
.blog-startup-menu { display: none; }
.blog-startup-content { display: flex; align-items: flex-start; }
.blog-skeleton-panel { margin-bottom: 20px; overflow: hidden; border: 1px solid #ddd; border-radius: 12px; background: #fff; }
.blog-skeleton-panel-heading { display: flex; align-items: center; height: 43px; padding: 0 18px; border-bottom: 1px solid #ddd; background: #f5f5f5; }
.blog-skeleton-panel-heading .blog-skeleton-line { width: 78px; height: 16px; }
.blog-skeleton-panel-body { padding: 14px; }
.blog-skeleton-about-body { display: flex; gap: 15px; min-height: 128px; }
.blog-skeleton-avatar { flex: 0 0 100px; height: 100px; border-radius: 10px; }
.blog-skeleton-about-copy { flex: 1; min-width: 0; display: grid; align-content: start; gap: 12px; }
.blog-skeleton-about-copy .blog-skeleton-name { width: 58%; height: 17px; }
.blog-skeleton-about-copy .blog-skeleton-short { width: 70%; }
.blog-skeleton-chips { display: flex; flex-wrap: wrap; gap: 3px; }
.blog-skeleton-chip { width: 42px; height: 22px; border: 1px solid #ddd; border-radius: 4px; }
.blog-skeleton-chip:nth-child(3n) { width: 58px; }
.blog-skeleton-tab-head { display: flex; height: 45px; border-bottom: 1px solid #ddd; background: #f5f5f5; }
.blog-skeleton-tab-head .blog-skeleton-line { flex: 1; height: 14px; margin: 15px 9px; }
.blog-skeleton-tab-list { display: grid; gap: 6px; padding: 12px 18px 16px; }
.blog-skeleton-tab-row { display: flex; align-items: center; gap: 6px; height: 19px; }
.blog-skeleton-rank { flex: 0 0 18px; height: 18px; border-radius: 4px; }
.blog-skeleton-tab-row .blog-skeleton-line { width: 78%; height: 11px; }
.blog-skeleton-tab-row:nth-child(3n) .blog-skeleton-line { width: 57%; }
.blog-skeleton-link-rows, .blog-skeleton-info-rows { display: grid; gap: 12px; }
.blog-skeleton-link-rows .blog-skeleton-line { width: 70%; }
.blog-skeleton-info-rows .blog-skeleton-line { width: 60%; }

@media (max-width: 1023px) {
    .blog-startup-content { display: block; }
    .blog-startup-sidebar { width: 100%; padding-left: 0; }
}
@media (max-width: 640px) {
    .blog-skeleton-detail-title { width: 80%; }
    .blog-skeleton-detail-meta { width: 68%; }
    .blog-skeleton-comment-fields { gap: 6px; }
    .blog-skeleton-card { min-height: 99px; }
    .blog-skeleton-card .blogpic { height: 70px; }
    .blog-skeleton-category, .blog-skeleton-card .blogtext, .blog-skeleton-button { display: none; }
    .blog-skeleton-card .blogtitle { padding-top: 0; }
    .blog-skeleton-title { width: 85%; height: 16px; }
    .blog-skeleton-mobile-title { display: block; width: 58%; height: 16px; margin-top: 6px; }
    .blog-skeleton-card .bloginfo { bottom: 15px; left: 15px; right: 15px; min-height: 10px; }
    .blog-skeleton-meta .blog-skeleton-line:first-child { width: 75px; }
    .blog-startup-links { display: none; }
    .blog-startup-menu { display: block; width: 44px; height: 35px; margin-left: auto; border-radius: 4px; background: #a8d2f3; }
}
@media (max-width: 768px) {
    .blog-boot-article .blog-skeleton-toc { display: none; }
}
@media (prefers-reduced-motion: reduce) {
    .blog-skeleton-block, .blog-skeleton-line, .blog-skeleton-card--cover .blogpic { animation: none; }
}