:root {
  --article-ink: var(--color-text, #eef2ec);
  --article-muted: var(--color-muted, #98a09a);
  --article-line: color-mix(in srgb, var(--color-text, #eef2ec) 13%, transparent);
  --article-panel: #101312;
  --article-panel-soft: #151918;
  --article-accent: var(--color-accent, #b7ff3c);
  --article-accent-soft: color-mix(in srgb, var(--article-accent) 14%, transparent);
  --article-copy: min(100%, 780px);
}

.page-article *,
.page-article *::before,
.page-article *::after {
  box-sizing: border-box;
}

.page-article {
  background:
    radial-gradient(circle at 82% 12%, color-mix(in srgb, var(--article-accent) 7%, transparent), transparent 26rem),
    #090b0a;
  color: var(--article-ink);
}

.reading-progress {
  position: fixed;
  z-index: 1100;
  inset: 0 0 auto;
  height: 2px;
  pointer-events: none;
  background: rgba(255, 255, 255, 0.05);
}

.reading-progress span {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--article-accent);
  box-shadow: 0 0 16px color-mix(in srgb, var(--article-accent) 72%, transparent);
  transform: scaleX(0);
  transform-origin: left center;
  will-change: transform;
}

.article-layout {
  display: grid;
  grid-template-columns: 232px minmax(0, 900px);
  justify-content: center;
  gap: clamp(2.5rem, 5vw, 6.5rem);
  padding-block: calc(var(--header-h) + clamp(3rem, 7vw, 7rem)) 7rem;
}

.article-toc {
  position: sticky;
  top: 7.5rem;
  align-self: start;
  max-height: calc(100vh - 9rem);
  overflow: auto;
  padding: 0 0.25rem 1rem 1rem;
  border-left: 1px solid var(--article-line);
  scrollbar-width: thin;
}

.article-toc > strong {
  display: block;
  margin-bottom: 1.25rem;
  color: var(--article-muted);
  font-size: 0.68rem;
  font-weight: 650;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.article-toc nav {
  display: grid;
  gap: 0.15rem;
}

.article-toc nav a {
  position: relative;
  padding: 0.62rem 0.75rem;
  color: var(--article-muted);
  font-size: 0.82rem;
  line-height: 1.45;
  text-decoration: none;
  border-radius: 0.45rem;
  transition: color 180ms ease, background-color 180ms ease, transform 180ms ease;
}

.article-toc nav a::before {
  content: "";
  position: absolute;
  left: -1.08rem;
  top: 50%;
  width: 2px;
  height: 0;
  background: var(--article-accent);
  transform: translateY(-50%);
  transition: height 180ms ease;
}

.article-toc nav a:hover,
.article-toc nav a[aria-current="location"] {
  color: var(--article-ink);
  background: rgba(255, 255, 255, 0.045);
  transform: translateX(0.18rem);
}

.article-toc nav a[aria-current="location"]::before {
  height: 1.5rem;
}

.toc-copy-button {
  width: 100%;
  margin-top: 1.35rem;
  padding: 0.9rem;
  color: #10130f;
  text-align: left;
  background: var(--article-accent);
  border: 0;
  border-radius: 0.55rem;
  cursor: pointer;
}

.toc-copy-button span,
.toc-copy-button small {
  display: block;
}

.toc-copy-button span {
  font-size: 0.8rem;
  font-weight: 760;
}

.toc-copy-button small {
  margin-top: 0.2rem;
  font-size: 0.65rem;
  opacity: 0.68;
}

.article-content {
  min-width: 0;
}

.article-header {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(260px, 0.88fr);
  min-height: 440px;
  overflow: hidden;
  border: 1px solid var(--article-line);
  border-radius: 1.15rem;
  background: #0d100f;
  box-shadow: 0 34px 90px rgba(0, 0, 0, 0.34);
}

.article-heading-copy {
  position: relative;
  z-index: 2;
  align-self: end;
  padding: clamp(2rem, 5vw, 4.75rem);
  background: linear-gradient(90deg, #0d100f 78%, transparent);
}

.article-cover {
  position: absolute;
  inset: 0 0 0 42%;
}

.article-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, #0d100f 0, transparent 55%),
    linear-gradient(0deg, rgba(13, 16, 15, 0.82), transparent 48%);
}

.article-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.82) contrast(1.08) brightness(0.72);
}

.document-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 1.4rem;
}

.document-tags span {
  padding: 0.4rem 0.65rem;
  color: var(--article-accent);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  border: 1px solid color-mix(in srgb, var(--article-accent) 35%, transparent);
  border-radius: 999px;
  background: color-mix(in srgb, var(--article-accent) 7%, transparent);
}

.article-eyebrow {
  margin: 0 0 1rem;
  color: var(--article-muted);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.68rem;
  letter-spacing: 0.15em;
}

.article-header h1 {
  max-width: 15ch;
  margin: 0;
  color: #f5f8f2;
  font-size: clamp(2.2rem, 5.2vw, 4.75rem);
  line-height: 1.02;
  letter-spacing: -0.055em;
}

.article-deck {
  max-width: 36rem;
  margin: 1.45rem 0 0;
  color: #bdc4be;
  font-size: clamp(0.98rem, 1.3vw, 1.12rem);
  line-height: 1.75;
}

.article-meta {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
  color: #7f8981;
  font-size: 0.72rem;
}

.article-meta span + span::before {
  content: "/";
  margin-right: 1rem;
  color: #4f5751;
}

.mobile-toc {
  display: none;
}

.article-content > .article-callout:first-of-type {
  margin-top: 3rem;
}

.article-content > section {
  width: var(--article-copy);
  margin-top: clamp(4.5rem, 9vw, 8rem);
  scroll-margin-top: 7.2rem;
}

.article-content > section::before {
  content: "";
  display: block;
  width: 2.2rem;
  height: 2px;
  margin-bottom: 1.65rem;
  background: var(--article-accent);
  box-shadow: 0 0 12px color-mix(in srgb, var(--article-accent) 45%, transparent);
}

.article-content h2 {
  margin: 0 0 1.6rem;
  color: #f1f5ef;
  font-size: clamp(1.75rem, 3vw, 2.6rem);
  line-height: 1.17;
  letter-spacing: -0.035em;
}

.article-content h3 {
  margin: 2.6rem 0 1rem;
  color: #e9eee8;
  font-size: clamp(1.12rem, 1.8vw, 1.35rem);
  line-height: 1.35;
}

.article-content h4 {
  margin: 0;
  color: #eaf0e8;
  font-size: 0.95rem;
}

.article-content p,
.article-content li {
  color: #b6beb7;
  font-size: 1rem;
  line-height: 1.9;
}

.article-content ol,
.article-content ul {
  padding-left: 1.35rem;
}

.article-callout {
  display: flex;
  gap: 1rem;
  width: var(--article-copy);
  margin: 2rem 0;
  padding: 1.25rem 1.4rem;
  border: 1px solid color-mix(in srgb, var(--article-accent) 24%, transparent);
  border-left: 3px solid var(--article-accent);
  border-radius: 0.65rem;
  background: linear-gradient(110deg, color-mix(in srgb, var(--article-accent) 9%, transparent), rgba(255, 255, 255, 0.018));
}

.article-callout > span {
  flex: 0 0 auto;
  font-size: 1rem;
  filter: grayscale(1);
}

.article-callout p {
  margin: 0;
}

.article-callout p + p,
.article-callout ol {
  margin-top: 0.65rem;
}

.table-scroll {
  width: var(--article-copy);
  margin: 1.5rem 0 2.5rem;
  overflow-x: auto;
  border: 1px solid var(--article-line);
  border-radius: 0.65rem;
  background: #0d100f;
  scrollbar-color: #3b443d transparent;
}

.table-scroll table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
}

.table-scroll th,
.table-scroll td {
  padding: 0.95rem 1rem;
  text-align: left;
  vertical-align: top;
  border-right: 1px solid var(--article-line);
  border-bottom: 1px solid var(--article-line);
}

.table-scroll th:last-child,
.table-scroll td:last-child {
  border-right: 0;
}

.table-scroll tbody tr:last-child td {
  border-bottom: 0;
}

.table-scroll th {
  color: #e9eee7;
  font-size: 0.75rem;
  font-weight: 680;
  letter-spacing: 0.035em;
  background: #171b19;
}

.table-scroll td {
  color: #aab3ac;
  font-size: 0.83rem;
  line-height: 1.72;
}

.code-block {
  position: relative;
  width: var(--article-copy);
  margin: 1.2rem 0 2.25rem;
  overflow: hidden;
  border: 1px solid var(--article-line);
  border-radius: 0.7rem;
  background: #050706;
  box-shadow: inset 0 1px rgba(255, 255, 255, 0.025);
}

.code-block::before {
  content: "PROMPT";
  position: absolute;
  top: 1.05rem;
  left: 1.15rem;
  color: #59615b;
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.62rem;
  letter-spacing: 0.14em;
}

.code-block button {
  position: absolute;
  z-index: 2;
  top: 0.65rem;
  right: 0.7rem;
  min-width: 4.25rem;
  padding: 0.45rem 0.65rem;
  color: #11150f;
  font-size: 0.7rem;
  font-weight: 720;
  border: 0;
  border-radius: 0.35rem;
  background: var(--article-accent);
  cursor: pointer;
  transition: transform 150ms ease, background-color 150ms ease;
}

.code-block button:hover {
  transform: translateY(-1px);
}

.code-block button[data-copy-state="success"] {
  background: #efffe0;
}

.code-block button[data-copy-state="error"] {
  color: white;
  background: #c04438;
}

.code-block pre {
  max-height: 32rem;
  margin: 0;
  padding: 3.65rem 1.15rem 1.4rem;
  overflow: auto;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  scrollbar-color: #354039 transparent;
}

.code-block-long pre {
  max-height: 44rem;
}

.code-block code {
  color: #c7d0c8;
  font-family: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.8rem;
  line-height: 1.85;
}

.example-grid,
.media-pair,
.responsibility-grid {
  display: grid;
  width: var(--article-copy);
  gap: 1rem;
}

.example-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.example-grid > div,
.responsibility-grid > div {
  min-width: 0;
  padding: 1.1rem;
  border: 1px solid var(--article-line);
  border-radius: 0.65rem;
  background: var(--article-panel);
}

.example-grid h3 {
  margin-top: 0;
}

.example-grid .code-block {
  width: 100%;
  margin-bottom: 0;
}

.article-media {
  width: var(--article-copy);
  margin: 1.7rem 0 2.5rem;
}

.article-media img,
.face-grid img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--article-line);
  border-radius: 0.7rem;
  background: #121513;
}

.article-media figcaption,
.face-grid figcaption {
  margin: 0.7rem 0 0;
  color: #747d76;
  font-size: 0.72rem;
  line-height: 1.6;
}

.media-pair {
  grid-template-columns: 1.18fr 0.82fr;
  align-items: start;
}

.media-pair .article-media {
  width: auto;
  margin-top: 0;
}

.media-pair .article-media img {
  aspect-ratio: auto;
  object-fit: contain;
}

.video-comparison {
  display: grid;
  width: var(--article-copy);
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 1.5rem 0 2.5rem;
}

.video-comparison figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--article-line);
  border-radius: 0.7rem;
  background: #050706;
}

.video-comparison figcaption {
  padding: 0.85rem 1rem;
  color: #e4ebe3;
  font-size: 0.78rem;
  font-weight: 650;
  border-bottom: 1px solid var(--article-line);
}

.video-comparison video {
  display: block;
  width: 100%;
  aspect-ratio: 9 / 16;
  max-height: 630px;
  background: black;
}

.responsibility-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.responsibility-grid p {
  margin: 0.55rem 0 0;
  font-size: 0.83rem;
  line-height: 1.65;
}

.advanced-section {
  position: relative;
}

.section-label {
  display: inline-flex;
  margin: 0 0 0.75rem;
  padding: 0.3rem 0.55rem;
  color: #10130f !important;
  font-size: 0.65rem !important;
  font-weight: 740;
  letter-spacing: 0.08em;
  background: var(--article-accent);
}

.face-grid {
  display: grid;
  width: var(--article-copy);
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.1rem;
  margin-top: 1.75rem;
}

.face-grid figure {
  margin: 0;
}

.face-grid img {
  aspect-ratio: auto;
  object-fit: contain;
}

.chapter-nav {
  display: grid;
  width: var(--article-copy);
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 0.75rem;
  margin-top: clamp(4.5rem, 9vw, 8rem);
  padding: 0.85rem;
  border: 1px solid var(--article-line);
  border-radius: 0.75rem;
  background: rgba(15, 18, 16, 0.92);
}

.chapter-nav button,
.chapter-nav p {
  min-width: 0;
  margin: 0;
  padding: 0.75rem;
  text-align: left;
}

.chapter-nav button {
  color: var(--article-ink);
  border: 0;
  border-radius: 0.45rem;
  background: transparent;
  cursor: pointer;
}

.chapter-nav button:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.05);
}

.chapter-nav button:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.chapter-nav span,
.chapter-nav small {
  display: block;
  margin-bottom: 0.35rem;
  color: #717a73;
  font-size: 0.62rem;
  letter-spacing: 0.08em;
}

.chapter-nav strong {
  display: block;
  overflow: hidden;
  color: #d8ded7;
  font-size: 0.72rem;
  line-height: 1.45;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chapter-nav p {
  text-align: center;
  border-inline: 1px solid var(--article-line);
}

.article-end {
  display: flex;
  width: var(--article-copy);
  align-items: center;
  justify-content: space-between;
  margin-top: 1rem;
  padding: 1rem 0;
}

.article-end a,
.article-end button {
  min-height: 42px;
  padding: 0.75rem 1rem;
  color: #dbe2da;
  font-size: 0.78rem;
  text-decoration: none;
  border: 1px solid var(--article-line);
  border-radius: 0.45rem;
  background: transparent;
  cursor: pointer;
}

.article-end button {
  color: #10130f;
  font-weight: 730;
  border-color: var(--article-accent);
  background: var(--article-accent);
}

@media (max-width: 1080px) {
  .article-layout {
    grid-template-columns: minmax(0, 850px);
  }

  .article-toc {
    display: none;
  }

  .mobile-toc {
    display: block;
    width: var(--article-copy);
    margin-top: 1.25rem;
    border: 1px solid var(--article-line);
    border-radius: 0.65rem;
    background: var(--article-panel);
  }

  .mobile-toc summary {
    padding: 1rem;
    color: #e4eae3;
    font-size: 0.82rem;
    font-weight: 660;
    cursor: pointer;
  }

  .mobile-toc nav {
    display: grid;
    gap: 0.15rem;
    padding: 0 0.65rem 0.85rem;
  }

  .mobile-toc a {
    padding: 0.6rem 0.4rem;
    color: var(--article-muted);
    font-size: 0.78rem;
    text-decoration: none;
    border-top: 1px solid var(--article-line);
  }
}

@media (max-width: 720px) {
  .article-layout {
    padding-top: calc(var(--header-h) + 1.25rem);
    padding-bottom: 4rem;
  }

  .article-header {
    display: block;
    min-height: 540px;
  }

  .article-cover {
    inset: 0 0 46%;
  }

  .article-cover::after {
    background: linear-gradient(0deg, #0d100f 4%, transparent 76%);
  }

  .article-heading-copy {
    position: absolute;
    inset: auto 0 0;
    padding: 1.5rem;
    background: linear-gradient(0deg, #0d100f 74%, transparent);
  }

  .article-header h1 {
    font-size: clamp(2rem, 10vw, 3rem);
  }

  .article-meta {
    flex-wrap: wrap;
    gap: 0.35rem 0.75rem;
    margin-top: 1.2rem;
  }

  .article-content > section {
    margin-top: 5rem;
  }

  .article-content p,
  .article-content li {
    font-size: 0.96rem;
  }

  .example-grid,
  .media-pair,
  .video-comparison,
  .responsibility-grid,
  .face-grid {
    grid-template-columns: 1fr;
  }

  .video-comparison video {
    max-height: none;
  }

  .chapter-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .chapter-nav p {
    grid-column: 1 / -1;
    grid-row: 1;
    text-align: left;
    border: 0;
    border-bottom: 1px solid var(--article-line);
  }

  .chapter-nav button:nth-of-type(2) {
    text-align: right;
  }
}

@media (max-width: 430px) {
  .article-header {
    min-height: 500px;
    border-radius: 0.75rem;
  }

  .article-heading-copy {
    padding: 1.25rem;
  }

  .article-eyebrow {
    letter-spacing: 0.08em;
  }

  .article-callout {
    padding: 1rem;
  }

  .table-scroll {
    margin-inline: -0.25rem;
    width: calc(100% + 0.5rem);
  }

  .article-end {
    align-items: stretch;
    gap: 0.65rem;
  }

  .article-end a,
  .article-end button {
    flex: 1;
    padding-inline: 0.7rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .reading-progress span,
  .article-toc nav a,
  .code-block button {
    transition: none;
  }
}

@media print {
  .global-header,
  .global-footer,
  .reading-progress,
  .article-toc,
  .mobile-toc,
  .chapter-nav,
  .article-end,
  [data-wechat-widget],
  .code-block button {
    display: none !important;
  }

  .page-article {
    background: white;
    color: black;
  }

  .article-layout {
    display: block;
    padding: 0;
  }

  .article-content > section,
  .article-callout,
  .table-scroll,
  .code-block,
  .article-media,
  .example-grid,
  .media-pair,
  .video-comparison,
  .responsibility-grid,
  .face-grid {
    width: 100%;
  }
}