.page-articles {
  background: var(--color-surface);
  color: var(--color-ink);
}

.page-articles .breadcrumb {
  padding: var(--space-3) 0 var(--space-1);
}

/* ---------- 首屏：专题封面 ---------- */
.page-articles .art-cover {
  padding: var(--space-2) 0 var(--section-y);
  border-bottom: 1px solid var(--color-line);
}

.page-articles .art-cover__title {
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: calc(var(--tracking-heading) * 3);
  margin: var(--space-3) 0 var(--space-3);
  overflow-wrap: break-word;
}

.page-articles .art-cover__lead {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  max-width: 48ch;
  margin: 0 0 var(--space-4);
}

.page-articles .art-cover__split {
  display: grid;
  gap: 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: var(--space-4);
}

.page-articles .art-cover__rail {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding: var(--space-4) var(--space-3);
}

.page-articles .art-cover__wide {
  background: var(--color-surface);
  padding: var(--space-4) var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

@media (min-width: 900px) {
  .page-articles .art-cover__split {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-articles .art-cover__rail {
    padding: var(--space-6) var(--space-4);
    border-right: 1px solid var(--color-contrast-line);
  }

  .page-articles .art-cover__wide {
    padding: var(--space-6) var(--space-4);
  }
}

.page-articles .art-rail__title {
  font-size: var(--text-xs);
  font-weight: var(--weight-heading);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--color-contrast-accent);
  margin: 0 0 var(--space-3);
}

.page-articles .art-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-articles .art-rail__item {
  border-top: 1px solid var(--color-contrast-line);
}

.page-articles .art-rail__item:last-child {
  border-bottom: 1px solid var(--color-contrast-line);
}

.page-articles .art-rail__link {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  color: inherit;
  text-decoration: none;
  transition: color 180ms ease;
}

.page-articles .art-rail__link:hover {
  color: var(--color-contrast-accent);
}

.page-articles .art-rail__link:focus-visible {
  outline: 2px solid var(--color-contrast-accent);
  outline-offset: 2px;
}

.page-articles .art-rail__no {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.06em;
  color: var(--color-contrast-accent);
}

.page-articles .art-rail__label {
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
}

.page-articles .art-cover__figure {
  margin: 0;
}

.page-articles .art-cover__figure .figure__frame {
  overflow: hidden;
  border-radius: var(--radius-sm);
}

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

.page-articles .art-scale {
  list-style: none;
  margin: 0;
  padding: var(--space-3) 0 0;
  border-top: 1px solid var(--color-line);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2);
}

.page-articles .art-scale__item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  min-width: 0;
  padding-left: var(--space-2);
  border-left: 1px solid var(--color-primary);
}

.page-articles .art-scale__num {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--color-ink);
}

.page-articles .art-scale__label {
  font-size: var(--text-xs);
  line-height: 1.4;
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

/* ---------- 宽松叙述带 ---------- */
.page-articles .art-how {
  padding: var(--section-y) 0;
  background: var(--color-surface-alt);
  border-bottom: 1px solid var(--color-line);
}

.page-articles .art-how__title {
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  margin: 0 0 var(--space-3);
  padding-left: var(--space-3);
  border-left: 1px solid var(--color-primary);
  max-width: 24ch;
}

.page-articles .art-how__text {
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  max-width: 60ch;
  margin: 0;
}

/* ---------- 六个分组索引带 ---------- */
.page-articles .art-index {
  padding: var(--section-y) 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-line);
}

.page-articles .art-index__title {
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  margin: var(--space-2) 0 0;
  max-width: 26ch;
}

.page-articles .art-index__grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1px;
  background: var(--color-line);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: var(--space-4);
}

.page-articles .art-index__cell {
  flex: 1 1 250px;
  min-width: 0;
  min-height: 176px;
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  background: var(--color-surface);
}

.page-articles .art-index__cell:nth-child(1),
.page-articles .art-index__cell:nth-child(4) {
  flex-grow: 2;
  background: var(--color-surface);
}

.page-articles .art-index__cell:nth-child(2),
.page-articles .art-index__cell:nth-child(5) {
  background: var(--color-surface-alt);
}

.page-articles .art-index__cell:nth-child(3),
.page-articles .art-index__cell:nth-child(6) {
  background: var(--color-surface-deep);
}

.page-articles .art-index__no {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin: 0;
}

.page-articles .art-index__name {
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  margin: 0;
}

.page-articles .art-index__desc {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  margin: 0;
}

.page-articles .art-index__cadence {
  margin: auto 0 0;
  padding-top: var(--space-1);
  border-top: 1px solid var(--color-line);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

/* ---------- 动态流引导带 ---------- */
.page-articles .art-stream__intro {
  padding: var(--section-y) 0;
  background: var(--color-primary-soft);
  border-bottom: 1px solid var(--color-line);
}

.page-articles .art-stream__title {
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: calc(var(--tracking-heading) * 2);
  margin: 0 0 var(--space-2);
}

.page-articles .art-stream__lead {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  max-width: 54ch;
  margin: 0;
}

/* ---------- 分组色带 ---------- */
.page-articles .art-band {
  padding: var(--section-y) 0;
  border-bottom: 1px solid var(--color-line);
  scroll-margin-top: var(--space-8);
}

.page-articles .art-band--a {
  background: var(--color-surface);
}

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

.page-articles .art-band--c {
  background: var(--color-surface-deep);
}

.page-articles .art-band__head {
  position: relative;
  padding-top: var(--space-3);
  margin-bottom: var(--space-4);
}

.page-articles .art-band__head::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: calc(var(--space-1) * 12);
  height: var(--space-1);
  background-image: repeating-linear-gradient(
    90deg,
    var(--color-primary) 0 1px,
    transparent 1px var(--space-1)
  );
}

.page-articles .art-band__no {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin: 0 0 var(--space-1);
}

.page-articles .art-band__title {
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  margin: 0 0 var(--space-1);
}

.page-articles .art-band__note {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  max-width: 56ch;
  margin: 0;
}

.page-articles .art-band__media {
  margin: 0 0 var(--space-4);
}

.page-articles .art-band__media .figure__frame {
  overflow: hidden;
  border-radius: var(--radius-sm);
  aspect-ratio: 16 / 9;
}

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

@media (min-width: 900px) {
  .page-articles .art-band__media .figure__frame {
    aspect-ratio: 21 / 8;
  }
}

/* ---------- 动态条目 ---------- */
.page-articles .art-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.page-articles .art-item {
  padding: var(--space-3) 0;
  border-top: 1px solid var(--color-line);
}

.page-articles .art-item:first-child {
  border-top: 1px solid var(--color-ink);
}

.page-articles .art-item__aside {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-2);
  margin-bottom: var(--space-2);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-radius: var(--radius-sm);
}

.page-articles .art-item__no {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.1em;
  color: var(--color-contrast-accent);
}

.page-articles .art-item__when {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-contrast-ink);
}

.page-articles .art-item__title {
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  margin: 0 0 var(--space-2);
  max-width: 42ch;
}

.page-articles .art-item__point,
.page-articles .art-item__impact {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  max-width: 60ch;
  margin: 0 0 var(--space-2);
}

.page-articles .art-item__point {
  color: var(--color-ink-soft);
}

.page-articles .art-item__impact {
  color: var(--color-ink);
  border-left: 1px solid var(--color-accent);
  padding-left: var(--space-2);
}

.page-articles .art-item__key {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--weight-heading);
  letter-spacing: 0.14em;
  color: var(--color-ink-muted);
  margin-right: var(--space-1);
}

.page-articles .art-item__toggle {
  display: inline-block;
  margin: var(--space-1) 0 0;
  padding: var(--space-1) var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-accent);
  background: transparent;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: color 180ms ease, border-color 180ms ease;
}

.page-articles .art-item__toggle:hover {
  border-color: var(--color-accent);
}

.page-articles .art-item__toggle:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.page-articles .art-item__toggle[aria-expanded="true"] {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.page-articles .art-item__panel {
  margin-top: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-left: 1px solid var(--color-primary);
  background: color-mix(in srgb, var(--color-primary) 8%, transparent);
}

.page-articles .art-item__panel .group-panel__inner > p {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  max-width: 60ch;
}

.page-articles .art-item__split {
  display: grid;
  gap: var(--space-3);
}

.page-articles .art-item__figure {
  margin: 0;
}

.page-articles .art-item__figure .figure__frame {
  overflow: hidden;
  border-radius: var(--radius-sm);
}

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

@media (min-width: 900px) {
  .page-articles .art-item {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(0, 9fr);
    gap: 0;
    padding: 0;
    border-top: 1px solid var(--color-line);
  }

  .page-articles .art-item:first-child {
    border-top: 1px solid var(--color-ink);
  }

  .page-articles .art-item__aside {
    margin: 0;
    border-radius: 0;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: var(--space-1);
    padding: var(--space-3) var(--space-2);
  }

  .page-articles .art-item__body {
    padding: var(--space-3) 0 var(--space-3) var(--space-3);
    background: var(--color-surface);
  }

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

  .page-articles .art-band--c .art-item__body {
    background: var(--color-surface-deep);
  }

  .page-articles .art-item__split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
    align-items: start;
  }
}

/* ---------- 回访出口 ---------- */
.page-articles .art-outro {
  padding: var(--section-y-lg) 0;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-articles .art-outro__grid {
  display: grid;
  gap: var(--space-4);
}

@media (min-width: 900px) {
  .page-articles .art-outro__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: var(--space-6);
    align-items: start;
  }
}

.page-articles .art-outro__eyebrow {
  color: var(--color-contrast-accent);
}

.page-articles .art-outro__title {
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  margin: var(--space-2) 0 var(--space-3);
  max-width: 22ch;
}

.page-articles .art-outro__text {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 80%, var(--color-contrast-surface));
  max-width: 56ch;
  margin: 0;
}

.page-articles .art-outro__actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  align-items: stretch;
}

.page-articles .art-outro__actions .btn {
  text-align: center;
}

@media (min-width: 900px) {
  .page-articles .art-outro__actions {
    align-items: flex-start;
  }

  .page-articles .art-outro__actions .btn {
    text-align: left;
  }
}
<<<END>>>