/* ===== 首页 · 竞赛档案封面长卷 ===== */

.page-home {
  --home-gap: clamp(1rem, 2.2vw, 1.75rem);
  --home-pad: clamp(3.25rem, 7vw, 6.5rem);
  --home-head-gap: clamp(1.75rem, 4vw, 3rem);
  --home-radius: 6px;
  display: block;
  color: var(--fg);
  background: var(--ink-0);
  overflow-x: clip;
}

.page-home .container {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* --- 章节骨架 --- */

.page-home .chapter {
  position: relative;
  padding-block: var(--home-pad);
}

.page-home .chapter--cover {
  padding-top: clamp(1.5rem, 3.5vw, 2.75rem);
  padding-bottom: clamp(2.5rem, 6vw, 5rem);
}

.page-home .chapter--last {
  padding-bottom: clamp(3.5rem, 8vw, 7rem);
}

.page-home .chapter-band {
  position: absolute;
  inset: 0 0 auto 0;
  height: 8px;
  background: linear-gradient(90deg, var(--accent) 0%, rgba(255, 106, 26, .28) 34%, transparent 72%);
  pointer-events: none;
}

.page-home .chapter-head {
  display: grid;
  gap: 1rem;
  margin-bottom: var(--home-head-gap);
}

.page-home .chapter-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: .4rem;
}

.page-home .chapter-title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.5rem, 3.6vw, 2.6rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--fg);
}

.page-home .chapter-desc {
  margin: 0;
  max-width: 34em;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--muted);
}

/* --- 面包屑 --- */

.page-home .breadcrumbs {
  display: flex;
  align-items: center;
  gap: .5rem;
  margin-bottom: clamp(1.25rem, 3vw, 2.25rem);
  font-size: .75rem;
  letter-spacing: .12em;
  color: var(--muted);
}

.page-home .crumb--current {
  color: var(--fg);
}

/* --- 通用媒体框 --- */

.page-home .media-frame {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: var(--home-radius);
  background: var(--ink-2);
}

.page-home .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-home .media-caption {
  position: absolute;
  inset: auto 0 0 0;
  padding: .5rem .75rem;
  font-size: .75rem;
  letter-spacing: .1em;
  color: var(--fg);
  background: linear-gradient(to top, rgba(6, 23, 38, .92), transparent);
}

/* --- 01 封面首屏 --- */

.page-home .cover-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: start;
}

.page-home .cover-copy {
  max-width: 40rem;
}

.page-home .eyebrow {
  margin: 0 0 .85rem;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--accent);
}

.page-home .cover-title {
  margin: 0 0 1.1rem;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.1rem, 7.2vw, 4.4rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--fg);
  max-width: 14em;
}

.page-home .cover-lead {
  margin: 0 0 clamp(1.75rem, 4vw, 2.75rem);
  max-width: 32em;
  font-size: clamp(1rem, 1.4vw, 1.125rem);
  line-height: 1.75;
  color: var(--muted);
}

.page-home .cover-index {
  display: grid;
  border-top: 1px solid var(--line);
}

.page-home .cover-link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: .9rem;
  padding: .95rem .25rem;
  border-bottom: 1px solid var(--line);
  color: var(--fg);
  text-decoration: none;
  transition: color .22s var(--ease), background-color .22s var(--ease), padding-inline-start .22s var(--ease);
}

.page-home .cover-link-num {
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--muted);
  transition: color .22s var(--ease);
}

.page-home .cover-link-text {
  font-size: 1rem;
  line-height: 1.5;
}

.page-home .cover-link-arrow {
  font-family: var(--font-mono);
  color: var(--accent);
  transition: transform .22s var(--ease);
}

.page-home .cover-link:hover,
.page-home .cover-link:focus-visible {
  color: var(--accent);
  background: rgba(255, 106, 26, .07);
  padding-inline-start: .85rem;
}

.page-home .cover-link:hover .cover-link-num,
.page-home .cover-link:focus-visible .cover-link-num {
  color: var(--accent-2);
}

.page-home .cover-link:hover .cover-link-arrow,
.page-home .cover-link:focus-visible .cover-link-arrow {
  transform: translateX(4px);
}

.page-home .cover-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.page-home .cover-media {
  position: relative;
}

.page-home .cover-figure img {
  aspect-ratio: 4 / 5;
  transition: transform .7s var(--ease);
}

.page-home .cover-media:hover .cover-figure img {
  transform: scale(1.03) translateY(-6px);
}

.page-home .cover-readout {
  position: absolute;
  left: clamp(.75rem, 2vw, 1.15rem);
  right: clamp(.75rem, 2vw, 1.15rem);
  bottom: clamp(.75rem, 2vw, 1.15rem);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: .2rem .85rem;
  padding: .9rem 1.05rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--home-radius);
  background: var(--glass);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
}

.page-home .readout-top {
  grid-column: 1;
  display: flex;
  align-items: center;
  gap: .45rem;
  font-size: .7rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-home .readout-num {
  grid-column: 2;
  grid-row: 1 / span 2;
  font-size: clamp(1.9rem, 4vw, 2.7rem);
  font-weight: 700;
  line-height: 1;
  color: var(--accent);
}

.page-home .readout-note {
  grid-column: 1;
  font-size: .8125rem;
  line-height: 1.5;
  color: var(--fg);
}

/* --- 02 轮次快照带 --- */

.page-home .round-track {
  display: flex;
  gap: var(--home-gap);
  padding: .25rem var(--gutter) 1.5rem;
  margin-inline: calc(var(--gutter) * -1);
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  scroll-snap-type: x mandatory;
  scroll-padding-inline: var(--gutter);
  scrollbar-width: thin;
  scrollbar-color: var(--ink-2) transparent;
}

.page-home .round-track > * {
  flex: 0 0 clamp(210px, 24vw, 268px);
  scroll-snap-align: start;
}

.page-home .round-figure {
  flex-basis: clamp(260px, 34vw, 400px);
}

.page-home .round-figure img {
  aspect-ratio: 16 / 9;
}

.page-home .round-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: .35rem;
  padding: 1.35rem 1.1rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: var(--home-radius);
  background: var(--ink-1);
  overflow: hidden;
}

.page-home .round-card::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 38%;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), transparent);
}

.page-home .round-card.is-current {
  border-color: rgba(255, 106, 26, .45);
  background: linear-gradient(180deg, rgba(255, 106, 26, .10), transparent 60%), var(--ink-1);
}

.page-home .round-card.is-current::before {
  width: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

.page-home .round-tag {
  display: flex;
  align-items: center;
  gap: .4rem;
  margin: 0;
  font-size: .8125rem;
  letter-spacing: .12em;
  color: var(--muted);
}

.page-home .round-card.is-current .round-tag {
  color: var(--accent);
}

.page-home .round-count {
  margin: 0;
  font-size: 1.75rem;
  font-weight: 800;
  line-height: 1.15;
  color: var(--fg);
}

.page-home .round-count .mono {
  font-size: clamp(1.9rem, 3vw, 2.4rem);
  color: var(--fg);
}

.page-home .round-meta {
  margin: .35rem 0 0;
  font-size: .8125rem;
  line-height: 1.6;
  color: var(--muted);
}

.page-home .round-dl {
  margin: 0;
  font-size: .8125rem;
  color: var(--muted);
}

.page-home .round-dl .mono {
  color: var(--accent-2);
}

/* --- 03 两条动线 --- */

.page-home .lane-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--home-gap);
}

.page-home .lane-panel {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: clamp(1.25rem, 2.4vw, 2rem);
  border: 1px solid var(--line);
  border-radius: var(--home-radius);
  background: var(--ink-1);
}

.page-home .lane-tag {
  align-self: flex-start;
  margin: 0;
  padding: .3rem .6rem;
  border: 1px solid rgba(255, 106, 26, .45);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--accent);
}

.page-home .lane-title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.25rem, 2.2vw, 1.65rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--fg);
}

.page-home .lane-text {
  margin: 0;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-home .lane-steps {
  display: grid;
  gap: .55rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-home .lane-steps li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: .75rem;
  align-items: baseline;
  padding-bottom: .55rem;
  border-bottom: 1px dashed var(--line);
  font-size: .9375rem;
  line-height: 1.6;
  color: var(--fg);
}

.page-home .lane-steps li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-home .lane-step-num {
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--accent);
}

.page-home .lane-figure img {
  aspect-ratio: 4 / 3;
}

.page-home .lane-figure--wide img {
  aspect-ratio: 16 / 9;
}

.page-home .lane-panel .btn {
  align-self: flex-start;
  margin-top: auto;
}

/* --- 04 球队快速定位 --- */

.page-home .team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}

.page-home .team-steps {
  display: grid;
  gap: 1.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-home .team-steps li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 1rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--line);
}

.page-home .team-steps li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-home .team-step-num {
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--accent);
  padding-top: .35rem;
}

.page-home .team-step-title {
  margin: 0 0 .35rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.0625rem;
  line-height: 1.4;
  color: var(--fg);
}

.page-home .team-steps p {
  margin: 0;
  max-width: 34em;
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-home .team-panel {
  padding: clamp(1.15rem, 2.2vw, 1.75rem);
  border: 1px solid var(--line-strong);
  border-radius: var(--home-radius);
  background: var(--ink-2);
}

.page-home .team-panel-label {
  margin: 0 0 .9rem;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--accent);
}

.page-home .team-letters {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin: 0 0 1.1rem;
  padding: 0;
  list-style: none;
}

.page-home .team-letters li {
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: rgba(6, 23, 38, .55);
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--muted);
}

.page-home .team-panel-note {
  margin: 0;
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--muted);
}

/* --- 05 更新与支持 --- */

.page-home .support-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}

.page-home .support-title {
  margin: 0 0 .75rem;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.2rem, 2.2vw, 1.6rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--fg);
}

.page-home .support-copy > p {
  margin: 0 0 1.25rem;
  max-width: 34em;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-home .support-points {
  display: grid;
  gap: .65rem;
  margin: 0 0 1.5rem;
  padding: 0;
  list-style: none;
}

.page-home .support-points li {
  position: relative;
  padding-left: 1.1rem;
  font-size: .9375rem;
  line-height: 1.7;
  color: var(--fg);
}

.page-home .support-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--signal);
}

.page-home .support-points a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-home .support-points a:hover,
.page-home .support-points a:focus-visible {
  color: var(--accent-2);
}

.page-home .support-note {
  margin: 0;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line);
  font-size: .875rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-home .support-panel {
  display: grid;
  gap: .9rem;
  padding: clamp(1.2rem, 2.4vw, 1.9rem);
  border: 1px solid var(--line-strong);
  border-radius: var(--home-radius);
  background: linear-gradient(160deg, rgba(255, 106, 26, .10), transparent 58%), var(--ink-1);
}

.page-home .support-panel-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-home .support-version {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  padding: .8rem .95rem;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: rgba(6, 23, 38, .6);
}

.page-home .support-version-num {
  font-size: clamp(1rem, 2vw, 1.25rem);
  letter-spacing: .06em;
  color: var(--fg);
}

.page-home .support-panel-note {
  margin: 0;
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-home .support-panel .btn {
  justify-self: start;
}

/* --- 按钮基线（页面内统一） --- */

.page-home .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .8rem 1.35rem;
  border: 1px solid transparent;
  border-radius: 3px;
  font-family: var(--font-body);
  font-size: .9375rem;
  font-weight: 700;
  letter-spacing: .02em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
}

.page-home .btn--primary {
  background: var(--accent);
  color: #061726;
}

.page-home .btn--primary:hover,
.page-home .btn--primary:focus-visible {
  background: var(--accent-2);
  transform: translateY(-2px);
}

.page-home .btn--ghost {
  background: transparent;
  border-color: var(--line-strong);
  color: var(--fg);
}

.page-home .btn--ghost:hover,
.page-home .btn--ghost:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}

.page-home .btn--sm {
  padding: .6rem 1rem;
  font-size: .875rem;
}

.page-home .btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* --- 页面刻度尺 --- */

.page-home .in-page-ruler {
  display: none;
}

/* --- 窄屏到宽屏的栅格切换 --- */

@media (min-width: 720px) {
  .page-home .round-track > * {
    flex-basis: clamp(220px, 22vw, 264px);
  }

  .page-home .round-figure {
    flex-basis: clamp(280px, 30vw, 380px);
  }

  .page-home .team-panel {
    max-width: 34rem;
  }
}

@media (min-width: 900px) {
  .page-home .chapter-head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 26em);
    align-items: end;
    gap: 2.5rem;
  }

  .page-home .cover-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(2rem, 4vw, 4rem);
  }

  .page-home .lane-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-home .team-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-home .support-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  }
}

@media (min-width: 1180px) {
  .page-home .in-page-ruler {
    display: flex;
    flex-direction: column;
    gap: .45rem;
    position: fixed;
    right: clamp(.6rem, 1.2vw, 1.25rem);
    top: 50%;
    transform: translateY(-50%);
    z-index: 30;
  }

  .page-home .ruler-item {
    display: flex;
    align-items: center;
    gap: .5rem;
    text-decoration: none;
    opacity: .5;
    transition: opacity .22s var(--ease);
  }

  .page-home .ruler-item:hover,
  .page-home .ruler-item:focus-visible,
  .page-home .ruler-item.is-current {
    opacity: 1;
  }

  .page-home .ruler-item.is-current .ruler-bar {
    background: var(--accent);
    width: 26px;
  }

  .page-home .ruler-item.is-current .ruler-num {
    color: var(--accent);
  }

  .page-home .ruler-num {
    font-size: 11px;
    letter-spacing: .18em;
    color: var(--muted);
    transition: color .22s var(--ease);
  }

  .page-home .ruler-bar {
    display: block;
    width: 16px;
    height: 2px;
    background: var(--line-strong);
    transition: width .22s var(--ease), background-color .22s var(--ease);
  }
}

/* --- 长页面的呼吸节奏（超宽屏） --- */

@media (min-width: 1440px) {
  .page-home .chapter-head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 30em);
  }
}

/* --- 减少动效 --- */

@media (prefers-reduced-motion: reduce) {
  .page-home .cover-figure img,
  .page-home .cover-link,
  .page-home .cover-link-arrow,
  .page-home .btn,
  .page-home .ruler-bar,
  .page-home .ruler-num {
    transition: none;
  }

  .page-home .cover-media:hover .cover-figure img,
  .page-home .btn--primary:hover {
    transform: none;
  }
}