.page-home {
  --home-edge: clamp(20px, 5vw, 72px);
  --home-lead-w: 62ch;
}

/* ---------- 首屏：章节预览 ---------- */
.page-home .home-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--jt-header-h) + clamp(56px, 12vh, 132px)) 0 clamp(52px, 9vh, 96px);
  border-bottom: 1px solid var(--jt-line-hair);
  background-color: var(--jt-ink);
}

.page-home .home-hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .3;
  filter: saturate(.5) brightness(.62);
}

.page-home .home-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(180deg, rgba(14, 31, 36, .88) 0%, rgba(14, 31, 36, .7) 42%, rgba(14, 31, 36, .97) 100%),
    repeating-linear-gradient(0deg, rgba(127, 168, 174, .055) 0 1px, transparent 1px 68px),
    repeating-linear-gradient(90deg, rgba(127, 168, 174, .055) 0 1px, transparent 1px 68px);
}

.page-home .home-hero__inner {
  position: relative;
  z-index: 1;
}

.page-home .home-hero__kicker {
  margin: 0 0 18px;
  font-size: 12px;
  letter-spacing: .26em;
  color: var(--jt-mist);
  text-transform: uppercase;
}

.page-home .home-hero__title {
  margin: 0;
  font-family: var(--jt-font-display);
  font-size: clamp(38px, 8vw, 84px);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.02;
  color: var(--jt-fog);
}

.page-home .home-hero__lead {
  max-width: var(--home-lead-w);
  margin: 22px 0 0;
  color: rgba(230, 238, 239, .78);
}

.page-home .home-hero__split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 5vw, 52px);
  margin-top: clamp(36px, 6vw, 64px);
}

/* 赛季轴 */
.page-home .home-axis {
  position: relative;
  padding-left: 26px;
}

.page-home .home-axis::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, rgba(255, 107, 44, .9), rgba(46, 110, 126, .55) 34%, rgba(60, 76, 80, .28));
}

.page-home .home-axis__toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 16px;
  padding: 6px 12px 6px 10px;
  font: inherit;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--jt-mist);
  background: rgba(46, 110, 126, .1);
  border: 1px solid var(--jt-line-hair);
  border-radius: var(--jt-radius);
  cursor: pointer;
  transition: color .25s var(--jt-ease), border-color .25s var(--jt-ease);
}

.page-home .home-axis__toggle:hover,
.page-home .home-axis__toggle:focus-visible {
  color: var(--jt-fog);
  border-color: rgba(255, 107, 44, .55);
}

.page-home .home-axis__toggle[aria-pressed="true"] .home-axis__dot {
  background: var(--jt-accent);
  box-shadow: 0 0 0 3px rgba(255, 107, 44, .2);
}

.page-home .home-axis__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--jt-line);
  transition: background .25s var(--jt-ease), box-shadow .25s var(--jt-ease);
}

.page-home .home-axis__label {
  margin: 0 0 14px;
  color: var(--jt-sand);
}

.page-home .home-axis__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-home .home-axis__tick {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 12px;
  color: var(--jt-mist);
}

.page-home .home-axis__tick::before {
  content: "";
  position: absolute;
  left: -26px;
  top: .55em;
  width: 13px;
  height: 1px;
  background: rgba(127, 168, 174, .45);
}

.page-home .home-axis__tick .jt-num {
  font-size: 13px;
  color: var(--jt-fog);
}

.page-home .home-axis__tick--now .jt-num {
  color: var(--jt-accent);
}

.page-home .home-axis__tick--now::before {
  width: 17px;
  background: var(--jt-accent);
}

.page-home .home-axis__foot {
  margin: 20px 0 0;
  font-size: 12px;
  line-height: 1.6;
}

/* 首屏章节索引 */
.page-home .home-index {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.page-home .home-index__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 20px;
  padding: 16px 0 16px 2px;
  border-top: 1px solid var(--jt-line-hair);
  text-decoration: none;
  color: var(--jt-fog);
  transition: padding-left .3s var(--jt-ease), border-color .3s var(--jt-ease), background-color .3s var(--jt-ease);
}

.page-home .home-index__item:last-child .home-index__link {
  border-bottom: 1px solid var(--jt-line-hair);
}

.page-home .home-index__link:hover,
.page-home .home-index__link:focus-visible {
  padding-left: 14px;
  border-color: rgba(76, 147, 168, .5);
  background: linear-gradient(90deg, rgba(46, 110, 126, .16), rgba(46, 110, 126, 0) 72%);
}

.page-home .home-index__num {
  font-size: 15px;
  color: var(--jt-accent);
  letter-spacing: .04em;
}

.page-home .home-index__body {
  display: grid;
  gap: 4px;
}

.page-home .home-index__title {
  font-size: clamp(17px, 2.4vw, 21px);
  font-weight: 600;
  letter-spacing: -.01em;
}

.page-home .home-index__desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--jt-mist);
}

/* ---------- 悬浮章节目录 ---------- */
.page-home .jt-toc {
  display: none;
}

.page-home .jt-toc__head {
  margin: 0 0 10px;
  color: var(--jt-mist);
}

.page-home .jt-toc__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-home .jt-toc__link {
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--jt-line);
  text-decoration: none;
  transition: color .25s var(--jt-ease);
}

.page-home .jt-toc__link:hover,
.page-home .jt-toc__link:focus-visible,
.page-home .jt-toc__item[data-active="true"] .jt-toc__link {
  color: var(--jt-fog);
}

/* ---------- 通用章节 ---------- */
.page-home .home-section {
  position: relative;
}

.page-home .home-section--alt {
  background: linear-gradient(180deg, rgba(22, 56, 47, .55), rgba(14, 31, 36, .2));
}

.page-home .home-section--deep {
  background: linear-gradient(180deg, rgba(8, 17, 20, .72), rgba(14, 31, 36, .1));
}

.page-home .home-lead {
  max-width: var(--home-lead-w);
  margin: 0 0 clamp(28px, 4vw, 44px);
  color: rgba(230, 238, 239, .8);
}

.page-home .home-note {
  margin: 20px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--jt-mist);
}

.page-home .home-note--wide {
  max-width: 74ch;
  margin-top: clamp(28px, 4vw, 42px);
}

/* 三线归档 / 效率两个错位区块 */
.page-home .home-split {
  align-items: start;
  row-gap: clamp(28px, 5vw, 48px);
}

.page-home .home-split__text .jt-prose + .jt-prose {
  margin-top: 14px;
}

.page-home .home-split__fig {
  margin: 0;
}

.page-home .home-split--reverse .home-split__aside {
  order: -1;
}

.page-home .home-fieldtable,
.page-home .home-sorttable {
  margin-top: clamp(24px, 3.5vw, 36px);
}

/* 口径提示框 */
.page-home .home-callout {
  border: 1px solid var(--jt-line-soft);
  border-left: 2px solid var(--jt-accent);
  background: rgba(22, 56, 47, .55);
  padding: clamp(20px, 3vw, 30px);
  box-shadow: var(--jt-shadow);
}

.page-home .home-callout__label {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--jt-mist);
}

.page-home .home-callout__formula {
  margin: 0;
  font-size: clamp(16px, 2.4vw, 20px);
  color: var(--jt-accent);
  letter-spacing: .02em;
}

.page-home .home-callout__note {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--jt-mist);
}

/* ---------- 分档速览 ---------- */
.page-home .home-grades {
  display: grid;
  gap: clamp(30px, 5vw, 56px);
}

.page-home .home-group {
  border-top: 1px solid var(--jt-line-hair);
  padding-top: 18px;
}

.page-home .home-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.page-home .home-group__title {
  margin: 0;
  font-size: clamp(16px, 2.2vw, 19px);
  font-weight: 600;
  color: var(--jt-fog);
}

.page-home .grade-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.page-home .grade {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 82px;
  padding: 12px 12px 14px;
  border: 1px solid var(--jt-line-hair);
  background: rgba(46, 110, 126, .07);
}

.page-home .grade__bar {
  display: block;
  height: 3px;
  width: 100%;
  background: var(--jt-lake);
  opacity: .16;
}

.page-home .grade:nth-child(2) .grade__bar { opacity: .28; }
.page-home .grade:nth-child(3) .grade__bar { opacity: .42; }
.page-home .grade:nth-child(4) .grade__bar { opacity: .6; }
.page-home .grade:nth-child(5) .grade__bar { opacity: .78; }
.page-home .grade:nth-child(6) .grade__bar { opacity: .95; }

.page-home .grade__label {
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--jt-fog);
  font-variant-numeric: tabular-nums;
}

/* ---------- 归档规模 ---------- */
.page-home .home-stats {
  margin: 0 0 clamp(34px, 5vw, 56px);
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--jt-line-hair);
  border: 1px solid var(--jt-line-hair);
}

.page-home .home-stats .jt-stat {
  display: grid;
  gap: 8px;
  padding: clamp(18px, 3vw, 28px);
  background: rgba(14, 31, 36, .92);
}

.page-home .home-stats .jt-stat__value {
  font-size: clamp(26px, 4.6vw, 40px);
  color: var(--jt-fog);
}

.page-home .home-stats .jt-stat--accent .jt-stat__value {
  color: var(--jt-accent);
}

.page-home .home-stats .jt-stat__label {
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--jt-mist);
}

.page-home .home-scale {
  align-items: center;
  row-gap: clamp(26px, 4vw, 40px);
}

.page-home .home-scale__text .jt-prose {
  margin-top: 0;
}

.page-home .home-scale__text .jt-btn {
  margin-top: 20px;
}

/* ---------- 后续路径 ---------- */
.page-home .home-paths {
  position: relative;
  overflow: hidden;
  background: var(--jt-deep);
}

.page-home .home-paths__texture {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .16;
  filter: saturate(.45) brightness(.7);
}

.page-home .home-paths::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(8, 17, 20, .94), rgba(14, 31, 36, .7) 45%, rgba(8, 17, 20, .96));
}

.page-home .home-paths .jt-container {
  position: relative;
  z-index: 1;
}

.page-home .home-paths__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--jt-line-hair);
  border-top: 1px solid var(--jt-line-hair);
  border-bottom: 1px solid var(--jt-line-hair);
}

.page-home .home-paths__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 18px;
  padding: clamp(18px, 3vw, 26px) clamp(14px, 2.4vw, 22px);
  background: rgba(8, 17, 20, .82);
  text-decoration: none;
  color: var(--jt-fog);
  transition: background-color .3s var(--jt-ease), padding-left .3s var(--jt-ease);
}

.page-home .home-paths__link:hover,
.page-home .home-paths__link:focus-visible {
  background: rgba(22, 56, 47, .9);
  padding-left: clamp(20px, 3vw, 30px);
}

.page-home .home-paths__num {
  grid-row: span 2;
  font-size: 13px;
  color: var(--jt-accent);
  letter-spacing: .1em;
}

.page-home .home-paths__title {
  font-size: clamp(17px, 2.3vw, 21px);
  font-weight: 600;
  letter-spacing: -.01em;
}

.page-home .home-paths__desc {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--jt-mist);
}

.page-home .home-paths__foot {
  margin: clamp(26px, 4vw, 40px) 0 0;
  font-size: 13px;
  line-height: 1.7;
  max-width: 66ch;
  color: var(--jt-mist);
}

/* ---------- 返回顶部 ---------- */
.page-home .jt-backtop {
  position: fixed;
  right: 18px;
  bottom: 22px;
  z-index: 40;
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  padding: 0;
  font: inherit;
  font-size: 15px;
  color: var(--jt-fog);
  background: rgba(8, 17, 20, .86);
  border: 1px solid var(--jt-line-soft);
  border-radius: 50%;
  cursor: pointer;
  transition: border-color .25s var(--jt-ease), color .25s var(--jt-ease);
}

.page-home .jt-backtop[data-visible="true"] {
  display: inline-flex;
}

.page-home .jt-backtop:hover,
.page-home .jt-backtop:focus-visible {
  color: var(--jt-accent);
  border-color: rgba(255, 107, 44, .6);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-home .grade-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-home .home-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-home .home-paths__link {
    grid-template-columns: auto minmax(0, 22ch) minmax(0, 1fr);
    align-items: baseline;
  }

  .page-home .home-paths__num {
    grid-row: span 1;
  }
}

@media (min-width: 900px) {
  .page-home .home-hero__split {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: clamp(44px, 6vw, 84px);
  }

  .page-home .home-grades {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-home .grade-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-home .home-split__fig {
    margin-top: clamp(24px, 4vw, 52px);
  }
}

@media (min-width: 1100px) {
  .page-home .jt-toc {
    display: block;
    position: fixed;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 30;
    width: 132px;
    padding: 14px 12px;
    background: rgba(8, 17, 20, .72);
    border: 1px solid var(--jt-line-hair);
  }

  .page-home .jt-toc__link {
    display: block;
    line-height: 1.5;
  }
}

@media (min-width: 1180px) {
  .page-home .home-hero__split {
    grid-template-columns: 232px minmax(0, 1fr);
  }

  .page-home .home-index__link {
    grid-template-columns: auto minmax(0, 1fr);
    padding: 18px 0 18px 2px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .home-index__link,
  .page-home .home-paths__link,
  .page-home .home-axis__dot,
  .page-home .jt-backtop {
    transition: none;
  }
}
</main>