.niaodun-source-blog { background: #050a14; }
.niaodun-source-blog [data-clue],
.niaodun-source-blog [class*="cluetalk"],
.niaodun-source-blog iframe[src*="cluetalk"] { display: none !important; }

.niaodun-blog-reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 600ms ease var(--nd-delay, 0ms), transform 600ms cubic-bezier(.2,.8,.2,1) var(--nd-delay, 0ms);
}
.niaodun-blog-reveal.is-visible { opacity: 1; transform: none; }

@keyframes niaodun-blog-blob-one {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(20px, 14px, 0) scale(1.05); }
}
@keyframes niaodun-blog-blob-two {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(-20px, -12px, 0) scale(1.04); }
}
@keyframes niaodun-blog-blob-three {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); opacity: .04; }
  50% { transform: translate3d(0, 0, 0) scale(1.2); opacity: .08; }
}
@keyframes niaodun-blog-float-one {
  0%, 100% { transform: translate3d(0, 0, 0) rotate(0deg); }
  50% { transform: translate3d(5px, -15px, 0) rotate(8deg); }
}
@keyframes niaodun-blog-float-two {
  0%, 100% { transform: translate3d(0, 0, 0) rotate(0deg); }
  50% { transform: translate3d(7px, -10px, 0) rotate(3deg); }
}
@keyframes niaodun-blog-float-three {
  0%, 100% { transform: translate3d(0, 0, 0) rotate(0deg); }
  50% { transform: translate3d(-4px, 12px, 0) rotate(-5deg); }
}
@keyframes niaodun-blog-float-four {
  0%, 100% { transform: translate3d(0, 0, 0) rotate(0deg); }
  50% { transform: translate3d(7px, -10px, 0) rotate(3deg); }
}
@keyframes niaodun-blog-scan {
  0% { top: 0; opacity: 0; }
  8%, 92% { opacity: 1; }
  100% { top: 100%; opacity: 0; }
}
@keyframes niaodun-blog-shimmer {
  0% { transform: translateX(-110%); }
  55%, 100% { transform: translateX(210%); }
}

.niaodun-blog-blob-1 { animation: niaodun-blog-blob-one 11s ease-in-out infinite; will-change: transform; }
.niaodun-blog-blob-2 { animation: niaodun-blog-blob-two 13s ease-in-out infinite; will-change: transform; }
.niaodun-blog-blob-3 { animation: niaodun-blog-blob-three 9s ease-in-out infinite; will-change: transform, opacity; }
.niaodun-blog-float-icon { animation-duration: var(--nd-float-duration, 8s); animation-delay: var(--nd-float-delay, 0s); animation-timing-function: ease-in-out; animation-iteration-count: infinite; will-change: transform; }
.niaodun-blog-float-icon-1 { animation-name: niaodun-blog-float-one; }
.niaodun-blog-float-icon-2 { animation-name: niaodun-blog-float-two; }
.niaodun-blog-float-icon-3 { animation-name: niaodun-blog-float-three; }
.niaodun-blog-float-icon-4 { animation-name: niaodun-blog-float-four; }
.niaodun-blog-scanline { animation: niaodun-blog-scan 5s linear infinite; will-change: top, opacity; }
.niaodun-blog-badge-shimmer { animation: niaodun-blog-shimmer 3.2s ease-in-out infinite; will-change: transform; }

.niaodun-blog-pagination .page-numbers {
  display: inline-flex;
  min-width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  padding: 0 10px;
  color: #a1a1aa;
  font-size: 14px;
  font-weight: 500;
  transition: color 200ms ease, background 200ms ease, border-color 200ms ease;
}
.niaodun-blog-pagination .page-numbers.current { border: 1px solid rgba(59,130,246,.25); background: rgba(59,130,246,.12); color: #93c5fd; }
.niaodun-blog-pagination a.page-numbers:hover { background: rgba(255,255,255,.05); color: #fff; }

.niaodun-404 {
  position: relative;
  display: grid;
  min-height: 680px;
  overflow: hidden;
  place-items: center;
  border-bottom: 1px solid rgba(255,255,255,.06);
  background: #050a14;
  padding: 112px 24px 96px;
}
.niaodun-404::before { position: absolute; inset: 0; background: radial-gradient(circle at 50% 40%, rgba(37,99,235,.13), transparent 42%); content: ""; pointer-events: none; }
.niaodun-404__grid { position: absolute; inset: 0; opacity: .055; background-image: linear-gradient(rgba(96,165,250,.35) 1px, transparent 1px), linear-gradient(90deg, rgba(96,165,250,.35) 1px, transparent 1px); background-size: 64px 64px; mask-image: radial-gradient(circle at center, #000, transparent 72%); }
.niaodun-404__scan { position: absolute; top: 0; right: 0; left: 0; height: 1px; background: linear-gradient(90deg, transparent, rgba(96,165,250,.45), transparent); animation: niaodun-blog-scan 6s linear infinite; }
.niaodun-404__inner { position: relative; z-index: 1; width: min(100%, 880px); text-align: center; }
.niaodun-404__code { display: inline-flex; align-items: center; gap: 9px; border: 1px solid rgba(96,165,250,.2); border-radius: 999px; background: rgba(59,130,246,.08); padding: 8px 14px; color: #93c5fd; font-size: 12px; font-weight: 600; }
.niaodun-404__code span { width: 7px; height: 7px; border-radius: 50%; background: #60a5fa; box-shadow: 0 0 0 5px rgba(96,165,250,.1); }
.niaodun-404 h1 { margin: 28px 0 0; color: #fff; font-size: 64px; font-weight: 800; line-height: 1.05; }
.niaodun-404__inner > p { max-width: 600px; margin: 20px auto 0; color: #a1a1aa; font-size: 17px; line-height: 1.7; }
.niaodun-404__actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 32px; }
.niaodun-404__actions :where(a, button) { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; gap: 8px; border-radius: 10px; padding: 0 20px; font-size: 14px; font-weight: 600; transition: transform 180ms ease, color 180ms ease, border-color 180ms ease, background 180ms ease; }
.niaodun-404__actions :where(a, button):hover { transform: translateY(-2px); }
.niaodun-404__actions svg { width: 16px; height: 16px; }
.niaodun-404__primary { background: #1677ff; color: #fff; box-shadow: 0 10px 30px rgba(22,119,255,.2); }
.niaodun-404__primary:hover { background: #2b86ff; }
.niaodun-404__secondary { border: 1px solid rgba(255,255,255,.1); background: rgba(255,255,255,.035); color: #d4d4d8; }
.niaodun-404__secondary:hover { border-color: rgba(96,165,250,.3); background: rgba(59,130,246,.07); color: #fff; }
.niaodun-404__links { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin-top: 52px; text-align: left; }
.niaodun-404__links a { display: flex; min-width: 0; flex-direction: column; gap: 5px; border-top: 1px solid rgba(255,255,255,.1); padding: 18px 4px 0; transition: border-color 180ms ease; }
.niaodun-404__links a:hover { border-color: #60a5fa; }
.niaodun-404__links strong { color: #e4e4e7; font-size: 14px; }
.niaodun-404__links span { overflow: hidden; color: #71717a; font-size: 12px; text-overflow: ellipsis; white-space: nowrap; }

.niaodun-article-page { min-height: 100vh; background: #060a13; }
.niaodun-article-cover { position: relative; height: 280px; overflow: hidden; }
.niaodun-article-cover > img { width: 100%; height: 100%; object-fit: cover; object-position: center; }
.niaodun-article-cover__shade { position: absolute; inset: 0; background: linear-gradient(to top, #060a13, rgba(6,10,19,.6), transparent); }
.niaodun-article-shell { width: min(100% - 32px, 1152px); margin: 0 auto; }
.niaodun-article-overlap { position: relative; margin-top: -96px; padding-bottom: 80px; }
.niaodun-article-breadcrumb { display: flex; align-items: center; gap: 6px; color: #a1a1aa; font-size: 14px; }
.niaodun-article-breadcrumb a { display: inline-flex; align-items: center; gap: 4px; color: inherit; transition: color 200ms ease; }
.niaodun-article-breadcrumb a:hover { color: #60a5fa; }
.niaodun-article-breadcrumb svg { width: 14px; height: 14px; color: #52525b; }
.niaodun-article-breadcrumb a:first-child svg { color: currentColor; }
.niaodun-article-layout { margin-top: 32px; }
.niaodun-article { min-width: 0; }
.niaodun-article h1 { margin: 16px 0 0; color: #fff; font-size: 24px; font-weight: 700; line-height: 1.25; }
.niaodun-article-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 20px; margin-top: 20px; border-bottom: 1px solid rgba(255,255,255,.1); padding-bottom: 24px; color: #a1a1aa; font-size: 14px; }
.niaodun-article-meta > span { display: inline-flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.niaodun-article-meta svg { width: 14px; height: 14px; flex-shrink: 0; color: #71717a; }
.niaodun-article-meta em { color: #71717a; font-style: normal; }
.niaodun-article-meta i { color: #52525b; font-style: normal; }
.niaodun-article-meta time { color: #d4d4d8; }
.niaodun-article-intro { margin: 24px 0 0; color: #a1a1aa; font-size: 18px; line-height: 1.65; }
.niaodun-article-content { margin-top: 32px; color: #d4d4d8; font-size: 15px; line-height: 1.8; }
.niaodun-article-content :where(h2, h3) { scroll-margin-top: 96px; }
.niaodun-article-content :where(h2, h3, h4) { color: #f4f4f5; font-weight: 600; line-height: 1.4; }
.niaodun-article-content h2 { margin: 40px 0 12px; border-bottom: 1px solid #3f3f46; padding-bottom: 8px; font-size: 21px; }
.niaodun-article-content h3 { margin: 28px 0 8px; font-size: 18px; }
.niaodun-article-content h4 { margin: 20px 0 8px; font-size: 16px; }
.niaodun-article-content p { margin: 14px 0; }
.niaodun-article-content ul,
.niaodun-article-content ol { margin: 16px 0; padding-left: 24px; }
.niaodun-article-content ul { list-style: disc; }
.niaodun-article-content ol { list-style: decimal; }
.niaodun-article-content li { margin: 6px 0; line-height: 1.75; }
.niaodun-article-content a { color: #60a5fa; text-decoration: underline; text-underline-offset: 3px; }
.niaodun-article-content strong { color: #fff; font-weight: 600; }
.niaodun-article-content img { max-width: 100%; height: auto; margin: 24px auto; border: 1px solid #3f3f46; border-radius: 8px; }
.niaodun-article-content blockquote { margin: 2em 0; border-left: 3px solid #3b82f6; background: rgba(59,130,246,.07); padding: 1px 20px; color: #d4d4d8; }
.niaodun-article-content pre { overflow-x: auto; border: 1px solid rgba(255,255,255,.08); border-radius: 10px; background: #080d18; padding: 18px; }
.niaodun-article-content table { display: block; width: 100%; overflow-x: auto; border-collapse: collapse; }
.niaodun-article-content th,
.niaodun-article-content td { border: 1px solid rgba(255,255,255,.1); padding: 10px 12px; }

.niaodun-article-aside { display: none; }
.niaodun-article-aside__sticky { position: sticky; top: 96px; display: flex; max-height: calc(100vh - 96px); flex-direction: column; gap: 16px; }
.niaodun-toc { min-height: 0; overflow: hidden; color: #71717a; font-size: 14px; }
.niaodun-toc > p { margin: 0 0 12px; color: #71717a; font-size: 12px; font-weight: 600; letter-spacing: 0; text-transform: uppercase; }
.niaodun-toc > div { display: flex; max-height: calc(100vh - 190px); flex-direction: column; gap: 4px; overflow-y: auto; }
.niaodun-toc a { overflow: hidden; border-left: 2px solid #3f3f46; padding: 5px 0 5px 12px; color: #a1a1aa; font-size: 13px; line-height: 1.35; text-overflow: ellipsis; white-space: nowrap; transition: color 180ms ease, border-color 180ms ease; }
.niaodun-toc a.is-subsection { padding-left: 22px; font-size: 12px; }
.niaodun-toc a:hover,
.niaodun-toc a.is-active { border-left-color: #60a5fa; color: #f4f4f5; }
.niaodun-copy-link { display: flex; width: 100%; flex-shrink: 0; align-items: center; gap: 10px; border: 1px solid rgba(255,255,255,.08); border-radius: 12px; background: rgba(255,255,255,.03); padding: 12px 16px; color: #a1a1aa; font-size: 14px; transition: color 200ms ease, border-color 200ms ease, background 200ms ease; }
.niaodun-copy-link:hover { border-color: rgba(59,130,246,.25); background: rgba(59,130,246,.06); color: #93c5fd; }
.niaodun-copy-link svg { width: 16px; height: 16px; }

.niaodun-article-nav { margin-top: 56px; border-top: 1px solid rgba(255,255,255,.08); padding-top: 32px; }
.niaodun-article-nav .nav-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.niaodun-article-nav a { display: flex; flex-direction: column; gap: 5px; color: #a1a1aa; }
.niaodun-article-nav .nav-next { text-align: right; }
.niaodun-article-nav span { color: #52525b; font-size: 12px; }
.niaodun-article-nav strong { color: #d4d4d8; font-size: 14px; }
.niaodun-article-nav a:hover strong { color: #93c5fd; }

.niaodun-related-articles {
  border-top: 1px solid rgba(255,255,255,.08);
  background: #060a13;
  padding: 64px 0 84px;
}
.niaodun-related-articles h2 {
  margin: 0 0 30px;
  color: #f4f4f5;
  font-size: 24px;
  font-weight: 700;
  line-height: 1.35;
}
.niaodun-related-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}
.niaodun-related-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 16px;
  background: #0a101d;
  transition: border-color 260ms ease, transform 260ms ease, box-shadow 260ms ease;
}
.niaodun-related-card:hover {
  border-color: rgba(96,165,250,.28);
  transform: translateY(-4px);
  box-shadow: 0 18px 42px rgba(0,0,0,.22);
}
.niaodun-related-card__image {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #0b0f18;
}
.niaodun-related-card__image img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 700ms cubic-bezier(.22,1,.36,1);
}
.niaodun-related-card:hover .niaodun-related-card__image img { transform: scale(1.04); }
.niaodun-related-card__body { display: flex; min-height: 104px; flex-direction: column; padding: 18px 20px 16px; }
.niaodun-related-card h3 { margin: 0; color: #f4f4f5; font-size: 16px; font-weight: 650; line-height: 1.45; }
.niaodun-related-card__meta { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: auto; padding-top: 16px; color: #71717a; font-size: 13px; }
.niaodun-related-card__meta span { color: #71717a; font-size: 20px; line-height: 1; transition: color 200ms ease, transform 200ms ease; }
.niaodun-related-card:hover .niaodun-related-card__meta span { color: #93c5fd; transform: translateX(3px); }

@media (max-width: 639px) {
  .niaodun-source-blog main section:first-child { padding-top: 5.5rem; }
  .niaodun-404 { min-height: 620px; padding: 96px 18px 72px; }
  .niaodun-404 h1 { font-size: 42px; }
  .niaodun-404__inner > p { font-size: 15px; }
  .niaodun-404__actions { display: grid; }
  .niaodun-404__links { grid-template-columns: 1fr; gap: 16px; margin-top: 40px; }
  .niaodun-article-nav .nav-links { grid-template-columns: 1fr; }
  .niaodun-article-nav .nav-next { text-align: left; }
  .niaodun-related-articles { padding: 48px 0 64px; }
  .niaodun-related-articles h2 { margin-bottom: 22px; font-size: 22px; }
  .niaodun-related-grid { grid-template-columns: 1fr; gap: 16px; }
}

@media (min-width: 640px) {
  .niaodun-article-cover { height: 360px; }
  .niaodun-article-shell { width: min(100% - 48px, 1152px); }
  .niaodun-article h1 { font-size: 30px; }
}

@media (min-width: 1024px) {
  .niaodun-article-cover { height: 420px; }
  .niaodun-article-shell { width: min(100% - 64px, 1152px); }
  .niaodun-article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 220px; gap: 40px; }
  .niaodun-article h1 { font-size: 36px; }
  .niaodun-article-aside { display: block; }
}

@media (min-width: 640px) and (max-width: 1023px) {
  .niaodun-related-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .niaodun-related-card:last-child { grid-column: 1 / -1; max-width: calc(50% - 12px); }
}

@media (prefers-reduced-motion: reduce) {
  .niaodun-blog-blob-1,
  .niaodun-blog-blob-2,
  .niaodun-blog-blob-3,
  .niaodun-blog-float-icon,
  .niaodun-blog-scanline,
  .niaodun-blog-badge-shimmer { animation: none !important; }
  .niaodun-blog-reveal { opacity: 1; transform: none; transition: none; }
}