.page-home {
  background: var(--bx-mist);
  color: var(--bx-ink);
  font-family: var(--bx-font-body);
  overflow-x: clip;
}

.page-home .stat-num {
  font-family: var(--bx-font-num);
  font-weight: 600;
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
}

/* ---------- Hero ---------- */
.page-home .hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--bx-ink);
  color: var(--bx-on-dark-strong);
  padding: clamp(64px, 13vw, 132px) 0 clamp(52px, 8vw, 92px);
}

.page-home .hero__media {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.page-home .hero__media img {
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  object-position: center 40%;
  opacity: 0.3;
  filter: grayscale(0.45) contrast(1.15);
}

.page-home .hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 12% 18%, rgba(200, 255, 61, 0.14), transparent 46%),
    repeating-linear-gradient(135deg, rgba(244, 247, 242, 0.045) 0 1px, transparent 1px 9px),
    linear-gradient(180deg, rgba(14, 27, 42, 0.72) 0%, rgba(14, 27, 42, 0.94) 78%, var(--bx-ink) 100%);
}

.page-home .hero__inner {
  position: relative;
}

.page-home .hero .eyebrow {
  color: var(--bx-lime);
}

.page-home .hero h1 {
  margin: 18px 0 0;
  font-family: var(--bx-font-head);
  font-weight: 700;
  font-size: clamp(38px, 8.4vw, 88px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  max-width: 16ch;
  color: var(--bx-white);
}

.page-home .hero__lead {
  margin: 24px 0 0;
  max-width: 58ch;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.8;
  color: var(--bx-on-dark);
}

.page-home .hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.page-home .hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(40px, 7vw, 68px) 0 0;
  padding: 0;
  border: 1px solid var(--bx-line-dark);
  border-radius: var(--bx-radius-m);
  overflow: hidden;
  background: var(--bx-line-dark);
}

.page-home .hero__stats .stat {
  padding: 16px 18px;
  background: rgba(14, 27, 42, 0.82);
}

.page-home .hero__stats dt {
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--bx-on-dark);
}

.page-home .hero__stats dd {
  margin: 8px 0 0;
  font-size: 15px;
  color: var(--bx-on-dark-strong);
}

.page-home .hero__stats .stat-num {
  font-size: clamp(22px, 3.4vw, 30px);
  color: var(--bx-lime);
  margin-right: 4px;
}

/* ---------- 章节骨架 ---------- */
.page-home .section {
  padding: clamp(56px, 9vw, 110px) 0;
}

.page-home .section__head {
  max-width: 74ch;
}

.page-home .section__head .chapter-num {
  display: block;
  font-family: var(--bx-font-num);
  font-size: clamp(30px, 5vw, 52px);
  font-weight: 700;
  line-height: 1;
  color: var(--bx-field);
  opacity: 0.9;
}

.page-home .section__title {
  margin: 14px 0 0;
  font-family: var(--bx-font-serif);
  font-weight: 700;
  font-size: clamp(26px, 4.6vw, 46px);
  line-height: 1.18;
  letter-spacing: -0.01em;
}

.page-home .section__lead {
  margin: 18px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--bx-slate);
  max-width: 62ch;
}

/* ---------- 01 梯队 ---------- */
.page-home .section--tiers {
  background:
    repeating-linear-gradient(-18deg, rgba(31, 122, 76, 0.05) 0 1px, transparent 1px 26px),
    var(--bx-mist);
}

.page-home .tier-intro {
  display: grid;
  gap: 28px;
  margin-top: 40px;
}

.page-home .tier-intro__text p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--bx-ink);
}

.page-home .axis-svg {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  margin-top: 18px;
}

.page-home .tier-intro__figure {
  margin: 0;
  border: 1px solid var(--bx-line);
  border-radius: var(--bx-radius-l);
  overflow: hidden;
  box-shadow: var(--bx-shadow-m);
  background: var(--bx-ink);
}

.page-home .tier-intro__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  opacity: 0.92;
}

.page-home .ladder {
  display: grid;
  gap: 16px;
  margin-top: 40px;
}

.page-home .ladder__item {
  min-width: 0;
}

.page-home .tier {
  border: 1px solid var(--bx-line);
  border-left: 3px solid var(--bx-field);
  border-radius: var(--bx-radius-m);
  background: var(--bx-white);
  box-shadow: var(--bx-shadow-s);
  transition: box-shadow 0.3s var(--bx-ease), border-color 0.3s var(--bx-ease);
}

.page-home .tier[open] {
  box-shadow: var(--bx-shadow-m);
  border-left-color: var(--bx-lime);
}

.page-home .tier summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
}

.page-home .tier summary::-webkit-details-marker {
  display: none;
}

.page-home .tier__code {
  font-family: var(--bx-font-num);
  font-weight: 700;
  font-size: 22px;
  color: var(--bx-field);
}

.page-home .tier__meta {
  font-size: 14px;
  color: var(--bx-slate);
}

.page-home .tier__count {
  margin-left: auto;
  font-size: 13px;
  color: var(--bx-ink);
  background: rgba(200, 255, 61, 0.45);
  border-radius: var(--bx-pill);
  padding: 4px 12px;
}

.page-home .tier__body {
  padding: 0 20px 20px;
  border-top: 1px solid var(--bx-line-soft);
  padding-top: 16px;
}

.page-home .tier__body p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--bx-slate);
}

.page-home .tier__body p:last-child {
  margin-bottom: 0;
  color: var(--bx-ink);
}

.page-home .tier__body .stat-num {
  color: var(--bx-field-deep);
}

/* ---------- 02 双赛季 ---------- */
.page-home .section--season {
  background:
    radial-gradient(circle at 88% 8%, rgba(31, 122, 76, 0.35), transparent 52%),
    var(--bx-ink);
  color: var(--bx-on-dark-strong);
}

.page-home .section--season .section__title {
  color: var(--bx-white);
}

.page-home .section--season .section__lead {
  color: var(--bx-on-dark);
}

.page-home .section--season .chapter-num {
  color: var(--bx-lime);
}

.page-home .season {
  display: grid;
  gap: 28px;
  margin-top: 40px;
}

.page-home .season__figure {
  margin: 0;
  border: 1px solid var(--bx-line-dark);
  border-radius: var(--bx-radius-l);
  overflow: hidden;
}

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

.page-home .season__cards {
  display: grid;
  gap: 14px;
}

.page-home .season__cards .data-card {
  background: rgba(244, 247, 242, 0.06);
  border: 1px solid var(--bx-line-dark);
  border-radius: var(--bx-radius-m);
  padding: 18px 20px;
}

.page-home .season__cards .data-card__label {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--bx-on-dark);
}

.page-home .season__cards .data-card__value {
  margin: 10px 0 0;
  color: var(--bx-lime);
  line-height: 1.1;
}

.page-home .season__cards .data-card__value .stat-num {
  font-size: clamp(34px, 6vw, 48px);
}

.page-home .season__cards .data-card__unit {
  font-family: var(--bx-font-num);
  font-size: 18px;
  margin-left: 6px;
  color: var(--bx-sprout);
}

.page-home .season__cards .data-card__note {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--bx-on-dark);
}

.page-home .season__foot {
  margin: 32px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--bx-on-dark);
  max-width: 70ch;
}

.page-home .season__foot a {
  color: var(--bx-lime);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 03 升降级 ---------- */
.page-home .section--zones {
  background: var(--bx-mist);
}

.page-home .zones {
  display: grid;
  gap: 32px;
  margin-top: 40px;
}

.page-home .zones__list {
  display: grid;
  gap: 14px;
}

.page-home .zone {
  position: relative;
  border: 1px solid var(--bx-line);
  border-radius: var(--bx-radius-m);
  background: var(--bx-white);
  padding: 20px 22px 22px;
  overflow: hidden;
}

.page-home .zone::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--bx-half);
}

.page-home .zone--top::before {
  background: var(--bx-orange);
}

.page-home .zone--up::before {
  background: var(--bx-orange-deep);
}

.page-home .zone--steady::before {
  background: var(--bx-field);
}

.page-home .zone--low::before {
  background: var(--bx-slate);
}

.page-home .zone--top,
.page-home .zone--up {
  background: linear-gradient(180deg, rgba(242, 107, 47, 0.07), rgba(242, 107, 47, 0) 68%), var(--bx-white);
}

.page-home .zone__name {
  margin: 0;
  font-family: var(--bx-font-serif);
  font-size: 19px;
  font-weight: 700;
}

.page-home .zone__range {
  margin: 6px 0 0;
  font-size: 15px;
  color: var(--bx-ink);
}

.page-home .zone__range .stat-num {
  color: var(--bx-orange-deep);
  font-size: 17px;
}

.page-home .zone__desc {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--bx-slate);
}

.page-home .zones__figure {
  margin: 0;
  border: 1px solid var(--bx-line);
  border-radius: var(--bx-radius-l);
  overflow: hidden;
  background: var(--bx-white);
  box-shadow: var(--bx-shadow-m);
}

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

.page-home .zones__figure figcaption {
  padding: 14px 18px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--bx-slate);
  border-top: 1px solid var(--bx-line-soft);
}

/* ---------- 04 教练履历 ---------- */
.page-home .section--coaches {
  background:
    repeating-linear-gradient(45deg, rgba(244, 247, 242, 0.05) 0 1px, transparent 1px 22px),
    var(--bx-teal);
  color: var(--bx-on-dark-strong);
}

.page-home .section--coaches .section__title {
  color: var(--bx-white);
}

.page-home .section--coaches .section__lead {
  color: rgba(244, 247, 242, 0.82);
}

.page-home .section--coaches .chapter-num {
  color: var(--bx-sprout);
}

.page-home .coaches {
  display: grid;
  gap: 18px;
  margin-top: 40px;
}

.page-home .coach-card {
  border: 1px solid var(--bx-line-dark);
  border-radius: var(--bx-radius-m);
  background: rgba(14, 27, 42, 0.42);
  padding: 22px;
}

.page-home .coach-card__label {
  margin: 0 0 14px;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--bx-sprout);
}

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

.page-home .coach-card__list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--bx-on-dark-strong);
}

.page-home .coach-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 9px;
  height: 2px;
  background: var(--bx-lime);
}

.page-home .coach-card__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--bx-on-dark-strong);
}

.page-home .coach-card__link {
  margin: 22px 0 0;
}

.page-home .coaches__foot {
  margin: 28px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(244, 247, 242, 0.78);
}

/* ---------- 05 检索与更新 ---------- */
.page-home .section--retrieval {
  background: var(--bx-white);
}

.page-home .retrieval {
  display: grid;
  gap: 34px;
  margin-top: 40px;
}

.page-home .retrieval__label {
  margin: 0 0 14px;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--bx-slate);
}

.page-home .field-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-home .field-list li {
  font-size: 14px;
  line-height: 1.4;
  padding: 8px 14px;
  border: 1px solid var(--bx-line);
  border-radius: var(--bx-pill);
  background: var(--bx-mist);
  color: var(--bx-ink);
}

.page-home .flow {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 18px;
  border-left: 1px solid var(--bx-line);
  padding-left: 20px;
}

.page-home .flow__item {
  position: relative;
}

.page-home .flow__item::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--bx-lime);
  border: 2px solid var(--bx-field);
}

.page-home .flow__num {
  font-family: var(--bx-font-num);
  font-size: 13px;
  font-weight: 600;
  color: var(--bx-field);
}

.page-home .flow__title {
  margin: 4px 0 6px;
  font-family: var(--bx-font-serif);
  font-size: 18px;
  font-weight: 700;
}

.page-home .flow__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--bx-slate);
}

.page-home .retrieval__links {
  margin: 24px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--bx-slate);
}

.page-home .retrieval__links a {
  color: var(--bx-field-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 06 服务支持 ---------- */
.page-home .section--support {
  background:
    radial-gradient(circle at 10% 90%, rgba(200, 255, 61, 0.12), transparent 48%),
    var(--bx-ink);
  color: var(--bx-on-dark-strong);
  padding-bottom: clamp(64px, 10vw, 120px);
}

.page-home .section--support .section__title {
  color: var(--bx-white);
}

.page-home .section--support .section__lead {
  color: var(--bx-on-dark);
}

.page-home .section--support .chapter-num {
  color: var(--bx-lime);
}

.page-home .support {
  display: grid;
  gap: 28px;
  margin-top: 40px;
}

.page-home .support__contact {
  border: 1px solid var(--bx-line-dark);
  border-radius: var(--bx-radius-m);
  padding: 22px;
  background: rgba(244, 247, 242, 0.05);
}

.page-home .support__row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  margin: 0 0 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--bx-line-dark);
}

.page-home .support__row:last-of-type {
  border-bottom: none;
}

.page-home .support__key {
  min-width: 82px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--bx-sprout);
}

.page-home .support__val {
  font-family: var(--bx-font-num);
  font-size: 15px;
  color: var(--bx-white);
  word-break: break-word;
}

.page-home .support__note {
  margin: 4px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--bx-on-dark);
}

.page-home .support__extra p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--bx-on-dark);
}

.page-home .support__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 媒体查询 ---------- */
@media (min-width: 620px) {
  .page-home .hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-home .ladder {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

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

@media (min-width: 900px) {
  .page-home .tier-intro {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: center;
    gap: 44px;
  }

  .page-home .season {
    grid-template-columns: 0.9fr 1.1fr;
    align-items: start;
    gap: 44px;
  }

  .page-home .zones {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: start;
    gap: 44px;
  }

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

  .page-home .coaches {
    grid-template-columns: 0.9fr 1.1fr;
    align-items: stretch;
  }

  .page-home .retrieval {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 48px;
  }

  .page-home .support {
    grid-template-columns: 1fr 1fr;
    gap: 44px;
    align-items: start;
  }

  .page-home .ladder {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-home .ladder__item:nth-child(3n + 2) {
    margin-top: 28px;
  }

  .page-home .ladder__item:nth-child(3n) {
    margin-top: 56px;
  }
}

@media (min-width: 1180px) {
  .page-home .hero h1 {
    max-width: 15ch;
  }

  .page-home .coach-card--wide {
    display: flex;
    flex-direction: column;
  }

  .page-home .coach-card--wide .coach-card__link {
    margin-top: auto;
  }
}

@media (max-width: 380px) {
  .page-home .hero__actions .btn,
  .page-home .support__actions .btn {
    width: 100%;
    justify-content: center;
  }

  .page-home .tier__count {
    margin-left: 0;
  }
}