.page-articles {
  --art-node: 8px;
  --art-indent: var(--space-4);
}

/* ---------- 刊头首屏 ---------- */
.page-articles .art-hero {
  position: relative;
  overflow: hidden;
  padding-block: var(--space-4) var(--space-8);
  background: linear-gradient(180deg, var(--color-surface-alt) 0%, var(--color-surface) 100%);
}

.page-articles .art-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--color-line) var(--border-thin), transparent var(--border-thin)),
    linear-gradient(to bottom, var(--color-line) var(--border-thin), transparent var(--border-thin));
  background-size: calc(var(--space-8) + var(--space-1)) calc(var(--space-8) + var(--space-1));
  opacity: 0.55;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 72%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 72%);
}

.page-articles .art-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: calc(var(--border-thick) + var(--border-thin));
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent) 58%, var(--color-highlight) 100%);
}

.page-articles .art-hero > .container {
  position: relative;
  z-index: 1;
}

.page-articles .art-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-4);
}

.page-articles .art-hero-main {
  min-width: 0;
}

.page-articles .art-hero-eyebrow {
  margin: 0;
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.page-articles .art-hero-title {
  margin: var(--space-2) 0 0;
  max-width: 15ch;
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: 1.04;
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-articles .art-hero-title::after {
  content: "";
  display: block;
  width: var(--space-6);
  height: var(--border-thick);
  margin-top: var(--space-2);
  background: var(--color-accent);
}

.page-articles .art-hero-text {
  margin: var(--space-3) 0 0;
  max-width: 46ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-articles .art-hero-text a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: var(--border-thin);
  text-underline-offset: 3px;
}

.page-articles .art-hero-text a:hover {
  color: var(--color-accent);
}

.page-articles .art-hero-panel {
  display: grid;
  align-content: start;
  min-width: 0;
  gap: var(--space-3);
  padding: var(--space-3);
  border-top: var(--border-thick) solid var(--color-accent);
  border-radius: var(--radius-lg);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-articles .art-hero-figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-sm);
  aspect-ratio: 16 / 10;
}

.page-articles .art-hero-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-articles .art-figure-scrim {
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
}

.page-articles .art-hero-figure-note {
  position: absolute;
  left: var(--space-2);
  bottom: var(--space-2);
  z-index: 1;
  margin: 0;
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-contrast-ink);
}

.page-articles .art-hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2);
  padding-block: var(--space-2);
  border-top: var(--border-thin) solid var(--color-contrast-line);
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

.page-articles .art-stat {
  min-width: 0;
}

.page-articles .art-stat-value {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: 1.05;
  color: var(--color-contrast-accent);
}

.page-articles .art-stat-label {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  line-height: 1.4;
  color: var(--color-contrast-ink);
  opacity: 0.72;
}

.page-articles .art-hero-leads {
  display: grid;
  gap: var(--space-2);
}

.page-articles .art-hero-lead-head {
  margin: 0;
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-contrast-accent);
}

.page-articles .art-hero-lead-list {
  display: grid;
  gap: var(--space-1);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-articles .art-hero-lead-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-2);
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--color-contrast-ink);
}

.page-articles .art-hero-lead-item span {
  font-family: var(--font-mono);
  color: var(--color-contrast-accent);
}

/* ---------- 页内目录 ---------- */
.page-articles .art-jump {
  background: var(--color-surface);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-articles .art-jump-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-articles .art-jump-link {
  display: inline-block;
  padding-block: var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
  text-decoration: none;
  border-bottom: var(--border-thick) solid transparent;
  transition: color 180ms ease-out, border-color 180ms ease-out;
}

.page-articles .art-jump-link:hover,
.page-articles .art-jump-link[data-active] {
  color: var(--color-primary);
  border-bottom-color: var(--color-accent);
}

/* ---------- 通用区块 ---------- */
.page-articles .art-block {
  padding-block: var(--section-y);
}

.page-articles .art-block--alt {
  background: var(--color-surface-alt);
}

.page-articles .art-block--deep {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-articles .art-block--deep .section-title {
  color: var(--color-contrast-ink);
}

.page-articles .art-block--deep .eyebrow {
  color: color-mix(in srgb, var(--color-contrast-accent) 88%, var(--color-contrast-ink));
}

.page-articles .art-block--deep .lede {
  color: color-mix(in srgb, var(--color-contrast-ink) 76%, transparent);
}

.page-articles .art-head {
  max-width: 64ch;
  margin-bottom: var(--space-6);
}

.page-articles .art-head .section-title {
  margin: var(--space-1) 0 0;
}

.page-articles .art-head .lede {
  margin: var(--space-2) 0 0;
}

/* ---------- 六类目录 ---------- */
.page-articles .art-cat-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-articles .art-cat {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    "code count"
    "main main";
  gap: var(--space-1) var(--space-3);
  padding-block: var(--space-3);
  border-bottom: var(--border-thin) dotted var(--color-line);
}

.page-articles .art-cat-code {
  grid-area: code;
  align-self: center;
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: var(--color-accent);
}

.page-articles .art-cat-main {
  grid-area: main;
  min-width: 0;
}

.page-articles .art-cat-name {
  margin: 0;
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-articles .art-cat-scope {
  margin: var(--space-1) 0 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-articles .art-cat-scope a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-articles .art-cat-scope a:hover {
  color: var(--color-accent);
}

.page-articles .art-cat-meta {
  margin: var(--space-1) 0 0;
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
}

.page-articles .art-cat-count {
  grid-area: count;
  display: flex;
  align-items: baseline;
  justify-content: flex-end;
  gap: var(--space-1);
}

.page-articles .art-cat-num {
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  line-height: 1;
  color: var(--color-primary);
}

.page-articles .art-cat-unit {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

/* ---------- 编号索引 ---------- */
.page-articles .art-index-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.page-articles .art-index-figure {
  margin: 0;
  min-width: 0;
}

.page-articles .art-index-figure .media {
  overflow: hidden;
  border-radius: var(--radius-sm);
}

.page-articles .art-index-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-articles .art-index-caption {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.page-articles .art-index-intro {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-lg);
  line-height: 1.65;
  color: var(--color-ink);
}

.page-articles .art-index-list {
  margin: 0;
  padding-left: var(--art-indent);
  list-style: none;
  border-left: var(--border-thin) solid var(--color-line);
}

.page-articles .art-entry {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-1) var(--space-3);
  padding-block: var(--space-3);
  border-bottom: var(--border-thin) dotted var(--color-line);
}

.page-articles .art-entry::before {
  content: "";
  position: absolute;
  top: calc(var(--space-3) + var(--space-1));
  left: calc(-1 * (var(--art-indent) + (var(--art-node) / 2)));
  width: var(--art-node);
  height: var(--art-node);
  border-radius: 50%;
  background: var(--color-primary);
}

.page-articles .art-entry:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-articles .art-entry-num {
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-primary);
}

.page-articles .art-entry-body {
  min-width: 0;
}

.page-articles .art-entry-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
}

.page-articles .art-tag {
  display: inline-flex;
  align-items: center;
  padding: calc(var(--space-1) / 4) var(--space-1);
  border-radius: var(--radius-pill);
  font-size: var(--text-xs);
  line-height: 1.6;
  white-space: nowrap;
}

.page-articles .art-tag[data-cat="insight"] {
  background: color-mix(in srgb, var(--color-primary) 14%, var(--color-surface));
  color: color-mix(in srgb, var(--color-primary) 88%, var(--color-ink));
}

.page-articles .art-tag[data-cat="release"] {
  background: color-mix(in srgb, var(--color-accent) 12%, var(--color-surface));
  color: color-mix(in srgb, var(--color-accent) 84%, var(--color-ink));
}

.page-articles .art-tag[data-cat="data"] {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-articles .art-tag[data-cat="guide"] {
  background: var(--color-primary-soft);
  color: color-mix(in srgb, var(--color-primary) 92%, var(--color-ink));
}

.page-articles .art-tag[data-cat="topic"] {
  background: var(--color-highlight);
  color: color-mix(in srgb, var(--color-accent) 88%, var(--color-ink));
}

.page-articles .art-tag[data-cat="note"] {
  background: var(--color-surface-deep);
  color: var(--color-ink-soft);
}

.page-articles .art-entry-cat {
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

.page-articles .art-entry-title {
  margin: var(--space-1) 0 0;
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: 1.4;
  color: var(--color-ink);
}

.page-articles .art-entry-desc {
  margin: var(--space-1) 0 0;
  max-width: 62ch;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

.page-articles .art-entry-side {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.page-articles .art-status {
  padding: calc(var(--space-1) / 4) var(--space-1);
  border-radius: var(--radius-pill);
  background: var(--color-surface-deep);
  color: var(--color-ink-soft);
  white-space: nowrap;
}

.page-articles .art-status--live {
  background: var(--color-highlight);
  color: color-mix(in srgb, var(--color-accent) 90%, var(--color-ink));
}

/* ---------- V4 专题 ---------- */
.page-articles .art-topic-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
}

.page-articles .art-topic-main {
  min-width: 0;
}

.page-articles .art-topic-main .section-title {
  margin: var(--space-1) 0 0;
}

.page-articles .art-topic-text {
  margin: var(--space-3) 0 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 82%, transparent);
}

.page-articles .art-topic-lines {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-2);
  margin: var(--space-4) 0 0;
  padding: 0;
  list-style: none;
}

.page-articles .art-topic-line {
  padding: var(--space-2);
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--color-contrast-ink) 5%, transparent);
}

.page-articles .art-topic-line-code {
  display: block;
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-contrast-accent);
}

.page-articles .art-topic-line-name {
  margin: var(--space-1) 0 0;
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-contrast-ink);
}

.page-articles .art-topic-line p {
  margin: var(--space-1) 0 0;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: color-mix(in srgb, var(--color-contrast-ink) 76%, transparent);
}

.page-articles .art-topic-status {
  margin: var(--space-3) 0 0;
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-contrast-line);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: color-mix(in srgb, var(--color-contrast-ink) 78%, transparent);
}

.page-articles .art-topic-figure {
  margin: 0;
  min-width: 0;
}

.page-articles .art-topic-figure .media {
  overflow: hidden;
  border-radius: var(--radius-md);
}

.page-articles .art-topic-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-articles .art-topic-caption {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  color: color-mix(in srgb, var(--color-contrast-ink) 66%, transparent);
}

/* ---------- 编辑部旁注 ---------- */
.page-articles .art-notes-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
}

.page-articles .art-notes-main {
  min-width: 0;
}

.page-articles .art-notes-list {
  display: grid;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-articles .art-note {
  padding-block: var(--space-3);
  border-bottom: var(--border-thin) dotted var(--color-line);
}

.page-articles .art-note-rank {
  display: inline-block;
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-accent);
}

.page-articles .art-note-title {
  margin: var(--space-1) 0 0;
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: 1.4;
  color: var(--color-ink);
}

.page-articles .art-note-why {
  margin: var(--space-1) 0 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-articles .art-quote {
  margin: var(--space-6) 0 0;
}

.page-articles .art-quote-source {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-articles .art-notes-figure {
  margin: 0;
  min-width: 0;
}

.page-articles .art-notes-figure .media {
  overflow: hidden;
  border-radius: var(--radius-md);
}

.page-articles .art-notes-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-articles .art-notes-caption {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

/* ---------- 更新节奏 ---------- */
.page-articles .art-rhythm-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
}

.page-articles .art-rhythm-main {
  min-width: 0;
}

.page-articles .art-rhythm-list {
  margin: 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-articles .art-rhythm-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-1);
  padding-block: var(--space-3);
  border-bottom: var(--border-thin) dotted var(--color-line);
}

.page-articles .art-rhythm-item dt {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-primary);
}

.page-articles .art-rhythm-item dd {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-articles .art-rhythm-aside {
  padding: var(--space-3);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.page-articles .art-rhythm-aside-title {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-accent);
}

.page-articles .art-rhythm-aside p {
  margin: 0 0 var(--space-2);
  font-size: var(--text-sm);
  line-height: 1.75;
  color: var(--color-ink-soft);
}

.page-articles .art-rhythm-aside p:last-of-type {
  margin-bottom: 0;
}

.page-articles .art-rhythm-aside a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-articles .art-rhythm-aside a:hover {
  color: var(--color-accent);
}

.page-articles .art-details {
  margin-top: var(--space-3);
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-articles .art-details summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding-block: var(--space-1);
  cursor: pointer;
  list-style: none;
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-articles .art-details summary::-webkit-details-marker {
  display: none;
}

.page-articles .art-details summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  line-height: 1;
  color: var(--color-accent);
}

.page-articles .art-details[open] summary::after {
  content: "−";
}

.page-articles .art-details .prose {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
}

.page-articles .art-details .prose ul {
  margin: 0;
  padding-left: var(--space-3);
  display: grid;
  gap: var(--space-1);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-articles .art-topic-lines {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-articles .art-rhythm-item {
    grid-template-columns: var(--space-8) minmax(0, 1fr);
    gap: var(--space-3);
    align-items: baseline;
  }
}

@media (min-width: 800px) {
  .page-articles .art-cat {
    grid-template-columns: var(--space-8) minmax(0, 1fr) calc(var(--space-8) + var(--space-3));
    grid-template-areas: "code main count";
    align-items: start;
    gap: var(--space-3);
  }

  .page-articles .art-index-top {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    align-items: center;
    gap: var(--space-6);
  }

  .page-articles .art-entry {
    grid-template-columns: calc(var(--space-8) - var(--space-1)) minmax(0, 1fr) calc(var(--space-8) + var(--space-8));
    align-items: start;
  }

  .page-articles .art-entry-side {
    flex-direction: column;
    align-items: flex-end;
    gap: var(--space-1);
    text-align: right;
  }
}

@media (min-width: 960px) {
  .page-articles .art-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-4);
    align-items: start;
  }

  .page-articles .art-topic-grid,
  .page-articles .art-notes-grid,
  .page-articles .art-rhythm-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-6);
    align-items: start;
  }

  .page-articles .art-topic-figure,
  .page-articles .art-notes-figure {
    position: sticky;
    top: var(--space-6);
  }
}
<<<END>>>