.page-articles {
  background: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-articles a:focus-visible,
.page-articles button:focus-visible,
.page-articles summary:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

/* ---------- 首屏：深色框景 + 赛季时间轨道 ---------- */
.page-articles .know-hero {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

.page-articles .know-hero__inner {
  padding-block: var(--space-4) var(--space-6);
}

.page-articles .know-hero__head {
  max-width: var(--measure);
  margin-top: var(--space-4);
}

.page-articles .know-hero__kicker {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-contrast-accent);
}

.page-articles .know-hero__title {
  margin: var(--space-2) 0 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-contrast-ink);
}

.page-articles .know-hero__lead {
  margin: var(--space-3) 0 0;
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 84%, transparent);
}

.page-articles .know-hero__grid {
  margin-top: var(--space-6);
  display: grid;
  gap: var(--space-4);
  align-items: end;
}

.page-articles .know-axis {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(0, 1fr);
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-articles .know-axis__node {
  position: relative;
  min-width: 0;
  padding: var(--space-3) var(--space-1) 0;
  border-left: var(--border-thin) solid var(--color-contrast-line);
}

.page-articles .know-axis__node::before {
  content: "";
  position: absolute;
  top: -3px;
  left: -1px;
  width: 5px;
  height: 5px;
  background: var(--color-contrast-line);
}

.page-articles .know-axis__node--now {
  border-left-color: var(--color-contrast-accent);
}

.page-articles .know-axis__node--now::before {
  top: -4px;
  width: 7px;
  height: 7px;
  background: var(--color-contrast-accent);
}

.page-articles .know-axis__label {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  line-height: 1.45;
  color: color-mix(in srgb, var(--color-contrast-ink) 86%, transparent);
  word-break: break-word;
}

.page-articles .know-axis__node--now .know-axis__label {
  color: var(--color-contrast-accent);
}

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

.page-articles .know-figures__item {
  min-width: 0;
}

.page-articles .know-figures__num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--color-contrast-accent);
}

.page-articles .know-figures__label {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  line-height: 1.5;
  color: color-mix(in srgb, var(--color-contrast-ink) 78%, transparent);
}

.page-articles .know-hero__media {
  margin: var(--space-6) 0 0;
  border: var(--border-thin) solid var(--color-contrast-line);
}

.page-articles .know-hero__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 1;
  object-fit: cover;
}

/* ---------- 主体两栏：目录轨道 + 条目流 ---------- */
.page-articles .know-body {
  display: grid;
  gap: var(--space-6);
  padding-block: var(--space-8);
  align-items: start;
}

.page-articles .know-rail {
  border-top: var(--border-thin) solid var(--color-line);
  padding-top: var(--space-2);
}

.page-articles .know-rail__title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

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

.page-articles .know-rail__item {
  min-width: 0;
}

.page-articles .know-rail__link {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  text-decoration: none;
  color: var(--color-ink);
  background: var(--color-surface-alt);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  padding: var(--space-1) var(--space-2);
  transition: color 120ms ease-out, background-color 120ms ease-out, border-color 120ms ease-out;
}

.page-articles .know-rail__link:hover {
  color: var(--color-primary);
  background: var(--color-primary-soft);
  border-color: var(--color-primary);
}

.page-articles .know-rail__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
}

.page-articles .know-rail__note {
  margin: var(--space-3) 0 0;
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-ink-muted);
  border-left: 2px solid var(--color-line);
  padding-left: var(--space-2);
}

/* ---------- 筛选条 ---------- */
.page-articles .know-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2);
  background: var(--color-surface-alt);
  border: var(--border-thin) solid var(--color-line);
  margin-bottom: var(--space-6);
}

.page-articles .know-filter__label {
  margin-right: var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

.page-articles .know-filter__btn {
  appearance: none;
  cursor: pointer;
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  line-height: 1;
  color: var(--color-ink);
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  padding: var(--space-1) var(--space-2);
  transition: color 120ms ease-out, background-color 120ms ease-out, border-color 120ms ease-out;
}

.page-articles .know-filter__btn:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.page-articles .know-filter__btn[aria-pressed="true"] {
  color: var(--color-primary-ink);
  background: var(--color-primary);
  border-color: var(--color-primary);
}

/* ---------- 分组 ---------- */
.page-articles .know-group {
  margin-bottom: var(--space-8);
  scroll-margin-top: calc(var(--header-h) + var(--space-3));
}

.page-articles .know-group__head {
  padding-bottom: var(--space-2);
  border-bottom: var(--border-thick) solid var(--color-line);
  margin-bottom: var(--space-4);
}

.page-articles .know-group__index {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.12em;
  color: var(--color-accent);
}

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

.page-articles .know-group__lead {
  margin: var(--space-2) 0 0;
  max-width: 62ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 条目 ---------- */
.page-articles .know-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-4);
}

.page-articles .know-item {
  min-width: 0;
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-articles .know-item__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-bottom: var(--space-1);
}

.page-articles .know-chip {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  line-height: 1.5;
  padding: 2px var(--space-1);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface-alt);
  color: var(--color-ink-soft);
  white-space: nowrap;
}

.page-articles .know-chip--now {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-ink);
}

.page-articles .know-chip--league {
  background: var(--color-primary-soft);
  border-color: var(--color-primary-soft);
  color: var(--color-primary);
}

.page-articles .know-item__title {
  margin: var(--space-1) 0 0;
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-articles .know-item__text {
  margin: var(--space-2) 0 0;
  max-width: 68ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-articles .know-item__text a,
.page-articles .know-exit__text a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-articles .know-item__more {
  margin-top: var(--space-2);
}

.page-articles .know-item__more > summary {
  cursor: pointer;
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  color: var(--color-primary);
  padding: var(--space-1) 0;
}

.page-articles .know-item__more > summary::-webkit-details-marker {
  display: none;
}

.page-articles .know-item__more > summary::marker {
  content: "";
}

.page-articles .know-item__more > summary::before {
  content: "+";
  display: inline-block;
  width: 1em;
  font-family: var(--font-mono);
  color: var(--color-accent);
}

.page-articles .know-item__more[open] > summary::before {
  content: "−";
}

.page-articles .know-item__more > p {
  margin: var(--space-1) 0 var(--space-2);
  max-width: 66ch;
  padding-left: var(--space-2);
  border-left: 2px solid var(--color-primary);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-articles .know-item__more > p a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-articles .know-item__media {
  margin: var(--space-3) 0 0;
  border: var(--border-thin) solid var(--color-line);
}

.page-articles .know-item__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- 中段过渡图 ---------- */
.page-articles .know-break {
  margin: 0 0 var(--space-8);
  border: var(--border-thin) solid var(--color-line);
  background: var(--color-surface-alt);
}

.page-articles .know-break__media {
  margin: 0;
}

.page-articles .know-break__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

.page-articles .know-break__caption {
  margin: 0;
  padding: var(--space-2) var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-ink-muted);
}

/* ---------- 行动出口 ---------- */
.page-articles .know-exit {
  background: var(--color-surface-alt);
  border: var(--border-thin) solid var(--color-line);
  border-left: calc(var(--border-thin) * 3) solid var(--color-accent);
  padding: var(--space-4);
}

.page-articles .know-exit__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-articles .know-exit__text {
  margin: var(--space-3) 0 0;
  max-width: 70ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-articles .know-exit__actions {
  margin-top: var(--space-4);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 720px) {
  .page-articles .know-item--narrow {
    width: 78%;
    margin-left: 6%;
  }

  .page-articles .know-item--narrow.know-item--right {
    margin-left: auto;
    margin-right: 6%;
  }
}

@media (min-width: 860px) {
  .page-articles .know-item--lead {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: var(--space-4);
    align-items: start;
  }

  .page-articles .know-item--lead.know-item--media-left .know-item__media {
    order: 1;
    margin-top: 0;
  }

  .page-articles .know-item--lead.know-item--media-left .know-item__main {
    order: 2;
  }

  .page-articles .know-item--lead.know-item--media-right .know-item__main {
    order: 1;
  }

  .page-articles .know-item--lead.know-item--media-right .know-item__media {
    order: 2;
    margin-top: 0;
  }
}

@media (min-width: 900px) {
  .page-articles .know-hero__inner {
    padding-block: var(--space-3) var(--space-8);
  }

  .page-articles .know-hero__grid {
    grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr);
    gap: var(--space-6);
  }

  .page-articles .know-figures {
    border-top: 0;
    padding-top: 0;
    align-self: end;
  }
}

@media (min-width: 980px) {
  .page-articles .know-body {
    grid-template-columns: var(--rail-w) minmax(0, 1fr);
    gap: var(--space-8);
  }

  .page-articles .know-rail {
    position: sticky;
    top: calc(var(--header-h) + var(--space-3));
  }

  .page-articles .know-rail__list {
    display: block;
  }

  .page-articles .know-rail__list > li + li {
    margin-top: var(--space-1);
  }

  .page-articles .know-rail__link {
    border-width: 0 0 0 2px;
    border-left-color: transparent;
    background: transparent;
    border-radius: 0;
    padding: var(--space-1) var(--space-2);
  }

  .page-articles .know-rail__link:hover {
    background: var(--color-primary-soft);
    border-left-color: var(--color-primary);
  }
}

@media (min-width: 1100px) {
  .page-articles .know-item--narrow {
    width: 72%;
  }

  .page-articles .know-exit {
    padding: var(--space-6);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-articles .know-rail__link,
  .page-articles .know-filter__btn {
    transition: none;
  }
}