.page-articles {
  --kb-hair: color-mix(in srgb, var(--color-line) 72%, transparent);
  --kb-tick: 3px;
}

.page-articles a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ---------- 面包屑 ---------- */
.page-articles .kb-crumbs {
  padding-top: var(--space-4);
}

/* ---------- 首屏 ---------- */
.page-articles .kb-hero {
  position: relative;
  padding-top: var(--space-6);
  padding-bottom: var(--space-8);
  background-image:
    radial-gradient(120% 92% at 8% -12%, color-mix(in srgb, var(--color-primary-soft) 94%, transparent) 0%, transparent 58%),
    radial-gradient(96% 78% at 98% 2%, color-mix(in srgb, var(--color-highlight) 90%, transparent) 0%, transparent 60%);
  background-repeat: no-repeat;
}

.page-articles .kb-hero__grid {
  display: grid;
  gap: var(--space-6);
  align-items: end;
}

.page-articles .kb-hero__title {
  margin: var(--space-3) 0;
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  max-width: 15ch;
}

.page-articles .kb-hero__lead {
  max-width: var(--measure);
  margin: 0 0 var(--space-4);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-articles .kb-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-articles .kb-stat {
  flex: 1 1 120px;
  padding: var(--space-2) var(--space-3);
  background: color-mix(in srgb, var(--color-surface) 76%, transparent);
  border: var(--border-thin) solid var(--kb-hair);
  border-radius: var(--radius-md);
}

.page-articles .kb-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 1.02;
  color: var(--color-primary);
}

.page-articles .kb-stat__label {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-articles .kb-hero__figure {
  margin: 0;
}

.page-articles .media-frame img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  object-fit: cover;
}

/* ---------- 编号带 ---------- */
.page-articles .kb-numberband {
  display: flex;
  gap: var(--space-1);
  max-width: 100%;
  margin-top: var(--space-6);
  padding-bottom: var(--space-1);
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-articles .kb-numberband__cell {
  flex: 0 0 auto;
  min-width: calc(var(--space-4) + var(--space-1));
  padding: var(--space-1) var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  text-align: center;
  text-decoration: none;
  color: var(--color-ink-soft);
  background: var(--color-surface-alt);
  border: var(--border-thin) solid var(--kb-hair);
  border-radius: var(--radius-sm);
  transition: background-color 220ms ease, color 220ms ease, transform 220ms ease;
}

.page-articles .kb-numberband__cell:hover,
.page-articles .kb-numberband__cell:focus-visible {
  background: var(--color-highlight);
  color: var(--color-ink);
  transform: translateY(-2px);
}

/* ---------- 分组 ---------- */
.page-articles .kb-group {
  padding-bottom: var(--space-6);
}

.page-articles .kb-group__panel {
  padding: var(--space-3);
  background: var(--color-surface-alt);
  border: var(--border-thin) solid var(--kb-hair);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
}

.page-articles .kb-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  padding-bottom: var(--space-2);
  margin-bottom: var(--space-3);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-articles .kb-group__label {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  min-width: 0;
}

.page-articles .kb-group__ord {
  flex: 0 0 auto;
  padding: 0 var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-primary-ink);
  background: var(--color-primary);
  border-radius: var(--radius-sm);
}

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

.page-articles .kb-group__meta {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-articles .kb-ticks {
  width: calc(var(--space-8) + var(--space-1));
  height: var(--kb-tick);
  border-radius: var(--radius-pill);
  background-image: repeating-linear-gradient(
    90deg,
    color-mix(in srgb, var(--color-ink-muted) 68%, transparent) 0,
    color-mix(in srgb, var(--color-ink-muted) 68%, transparent) var(--kb-tick),
    transparent var(--kb-tick),
    transparent calc(var(--kb-tick) * 4)
  );
}

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

.page-articles .kb-group__figure {
  margin: 0;
}

/* ---------- 条目行 ---------- */
.page-articles .kb-list {
  display: grid;
  gap: var(--space-1);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-articles .kb-item {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: var(--space-1) var(--space-2);
  padding: var(--space-2) var(--space-2) var(--space-2) var(--space-3);
  background: var(--color-surface);
  border: var(--border-thin) solid var(--kb-hair);
  border-radius: var(--radius-md);
  scroll-margin-top: var(--space-8);
  transition: transform 240ms ease, box-shadow 240ms ease, border-color 240ms ease;
}

.page-articles .kb-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 3px;
  height: 0;
  transform: translateY(-50%);
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  transition: height 240ms ease;
}

.page-articles .kb-item:hover,
.page-articles .kb-item:focus-within {
  transform: translateY(-2px);
  box-shadow: var(--shadow-1);
  border-color: color-mix(in srgb, var(--color-primary) 32%, var(--color-line));
}

.page-articles .kb-item:hover::before,
.page-articles .kb-item:focus-within::before {
  height: 54%;
}

.page-articles .kb-item__no {
  grid-row: 1 / -1;
  align-self: start;
  min-width: calc(var(--space-4) + var(--space-1));
  padding: var(--space-1) calc(var(--space-1) * 0.75);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  text-align: center;
  color: var(--color-ink-muted);
  background: var(--color-surface-alt);
  border-radius: var(--radius-sm);
  transition: background-color 240ms ease, color 240ms ease;
}

.page-articles .kb-item:hover .kb-item__no,
.page-articles .kb-item:focus-within .kb-item__no {
  background: var(--color-highlight);
  color: var(--color-ink);
}

.page-articles .kb-item__body {
  min-width: 0;
}

.page-articles .kb-item__title {
  margin: 0;
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-articles .kb-item__link {
  color: inherit;
  text-decoration: none;
  border-bottom: var(--border-thin) solid transparent;
  transition: color 220ms ease, border-color 220ms ease;
}

.page-articles .kb-item__link::after {
  content: "查看";
  margin-left: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  opacity: 0;
  transition: opacity 220ms ease;
}

.page-articles .kb-item:hover .kb-item__link::after,
.page-articles .kb-item:focus-within .kb-item__link::after {
  opacity: 1;
}

.page-articles .kb-item__link:hover {
  color: var(--color-primary);
  border-bottom-color: color-mix(in srgb, var(--color-primary) 45%, transparent);
}

.page-articles .kb-item__text {
  max-width: 62ch;
  margin: calc(var(--space-1) * 0.5) 0 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-articles .kb-item__tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  grid-column: 2;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-articles .kb-inline {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: var(--border-thin) solid color-mix(in srgb, var(--color-accent) 42%, transparent);
}

.page-articles .kb-inline:hover {
  border-bottom-color: var(--color-accent);
}

/* ---------- 索引说明 ---------- */
.page-articles .kb-note {
  margin-top: var(--space-4);
  padding: var(--section-y) 0;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-articles .kb-note__grid {
  display: grid;
  gap: var(--space-6);
}

.page-articles .kb-note__kicker {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-contrast-accent);
}

.page-articles .kb-note__title {
  margin: 0 0 var(--space-3);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-contrast-ink);
}

.page-articles .kb-note__lead-text {
  max-width: var(--measure);
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 80%, transparent);
}

.page-articles .kb-inline--dark {
  color: var(--color-contrast-accent);
  border-bottom-color: color-mix(in srgb, var(--color-contrast-accent) 48%, transparent);
}

.page-articles .kb-inline--dark:hover {
  border-bottom-color: var(--color-contrast-accent);
}

.page-articles .kb-note__list {
  display: grid;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-articles .kb-note__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-2);
  padding: var(--space-3);
  background: color-mix(in srgb, var(--color-contrast-line) 26%, transparent);
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-md);
}

.page-articles .kb-note__idx {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-contrast-accent);
}

.page-articles .kb-note__text {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 86%, transparent);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-articles .kb-group__panel {
    padding: var(--space-4);
  }

  .page-articles .kb-note__grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: start;
  }
}

@media (min-width: 880px) {
  .page-articles .kb-hero {
    padding-top: var(--space-8);
  }

  .page-articles .kb-hero__grid {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
    gap: var(--space-8);
  }
}

@media (min-width: 980px) {
  .page-articles .kb-group {
    padding-bottom: var(--space-8);
  }

  .page-articles .kb-group__panel {
    padding: var(--space-6);
  }

  .page-articles .kb-group__body--side {
    grid-template-columns: minmax(0, 1fr) 280px;
    align-items: start;
    gap: var(--space-4);
  }
}

@media (min-width: 1040px) {
  .page-articles .kb-item {
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: var(--space-2);
  }

  .page-articles .kb-item__no {
    grid-row: 1;
  }

  .page-articles .kb-item__tags {
    grid-column: 3;
    grid-row: 1;
    justify-content: flex-end;
  }
}
<<<END>>>