.page-home {
  padding-bottom: 72px;
}

/* ---------- 首屏拼贴 ---------- */

.page-home .hero-collage {
  display: grid;
  gap: 18px;
}

.page-home .hero-main {
  position: relative;
  display: flex;
  align-items: flex-end;
  min-height: 400px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-home .hero-main__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.42;
}

.page-home .hero-main__body {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 14px;
  width: 100%;
  padding: 26px 20px 28px;
  background: linear-gradient(180deg, rgba(11, 27, 43, 0) 0%, rgba(11, 27, 43, 0.86) 46%, rgba(11, 27, 43, 0.98) 100%);
}

.page-home .hero-main h1 {
  margin: 0;
  font-size: clamp(28px, 6.4vw, 40px);
  line-height: 1.24;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-home .hero-lede {
  margin: 0;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

.page-home .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 4px;
}

.page-home .hero-side {
  display: grid;
  gap: 18px;
}

.page-home .hero-card {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: 18px 18px 20px;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-home .hero-card:hover,
.page-home .hero-card:focus-within {
  transform: translateY(-3px);
  border-color: var(--amber);
}

.page-home .hero-card__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-home .hero-card__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
}

.page-home .hero-card__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-home .hero-card__link {
  justify-self: start;
  margin-top: 4px;
  font-size: 14px;
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-home .hero-card__link:hover,
.page-home .hero-card__link:focus-visible {
  border-bottom-color: var(--lime);
}

/* ---------- 章节骨架 ---------- */

.page-home .ph-section {
  margin-top: 72px;
}

.page-home .section-head {
  display: grid;
  gap: 10px;
}

.page-home .section-index {
  margin: 0;
}

.page-home .section-title {
  margin: 0;
  font-size: clamp(24px, 5.4vw, 40px);
  line-height: 1.26;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-home .section-lede {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

.page-home .rule-strip {
  margin: 22px 0 28px;
}

.page-home .ph-note {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted-dim);
}

/* ---------- 左右分栏 ---------- */

.page-home .ph-split {
  display: grid;
  gap: 26px;
}

.page-home .ph-split__main {
  min-width: 0;
}

/* ---------- 节奏清单 ---------- */

.page-home .ph-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-home .ph-list > li {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.page-home .ph-list > li:last-child {
  border-bottom: 1px solid var(--line);
}

.page-home .ph-list h3 {
  margin: 0 0 6px;
  font-size: 18px;
  line-height: 1.4;
  font-weight: 700;
  color: var(--text);
}

.page-home .ph-list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-home .ph-list--tight > li {
  padding: 15px 0;
}

/* ---------- 问题索引 ---------- */

.page-home .issue-grid {
  display: grid;
  gap: 16px;
}

.page-home .issue-card {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: 20px;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-home .issue-card:hover,
.page-home .issue-card:focus-within {
  transform: translateY(-3px);
  border-color: var(--orange);
}

.page-home .issue-card__top {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}

.page-home .issue-card h3 {
  margin: 0;
  font-size: 19px;
  line-height: 1.4;
  font-weight: 700;
  color: var(--text);
}

.page-home .issue-card__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--orange);
  border: 1px solid var(--line);
  padding: 3px 8px;
  background: var(--panel-soft);
}

.page-home .issue-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-home .issue-card__link {
  justify-self: start;
  font-size: 14px;
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-home .issue-card__link:hover,
.page-home .issue-card__link:focus-visible {
  border-bottom-color: var(--amber);
}

/* ---------- 两栏对照 ---------- */

.page-home .ph-compare {
  display: grid;
  gap: 18px;
}

.page-home .ph-compare__col {
  display: grid;
  gap: 14px;
  align-content: start;
  padding: 24px 20px 26px;
}

.page-home .ph-big {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
}

.page-home .ph-big--lime {
  color: var(--lime);
}

.page-home .ph-compare__lede {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-home .ph-ticks {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-home .ph-ticks li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
}

.page-home .ph-ticks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  background: var(--lime);
  opacity: 0.85;
}

.page-home .ph-compare__col .btn {
  justify-self: start;
  margin-top: 6px;
}

/* ---------- 联赛标签轨道 ---------- */

.page-home .league-wrap {
  position: relative;
  margin-bottom: 20px;
}

.page-home .league-wrap::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 56px;
  height: 100%;
  background: linear-gradient(90deg, rgba(11, 27, 43, 0) 0%, var(--ink) 100%);
  pointer-events: none;
}

.page-home .league-track {
  display: flex;
  gap: 10px;
  margin: 0;
  padding: 2px 56px 12px 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-home .league-track > li {
  flex: 0 0 auto;
}

.page-home .league-chip {
  display: inline-block;
  padding: 9px 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--muted);
  background: var(--panel);
  border: 1px solid var(--line);
  white-space: nowrap;
}

.page-home .league-chip.is-active {
  color: var(--ink);
  background: var(--amber);
  border-color: var(--amber);
  font-weight: 700;
}

/* ---------- 三步路径 ---------- */

.page-home .steps {
  display: grid;
  gap: 18px;
}

.page-home .step {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: 22px 20px 24px;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-home .step:hover,
.page-home .step:focus-within {
  transform: translateY(-3px);
  border-color: var(--violet);
}

.page-home .step__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  color: var(--violet);
}

.page-home .step h3 {
  margin: 0;
  font-size: 19px;
  line-height: 1.4;
  font-weight: 700;
  color: var(--text);
}

.page-home .step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-home .step__link {
  justify-self: start;
  font-size: 14px;
  color: var(--violet);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-home .step__link:hover,
.page-home .step__link:focus-visible {
  border-bottom-color: var(--violet);
}

.page-home .ph-path-figure {
  margin-top: 30px;
}

/* ---------- 图片通用 ---------- */

.page-home img {
  max-width: 100%;
  height: auto;
}

/* ---------- 断点 ---------- */

@media (min-width: 640px) {
  .page-home .issue-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-home .hero-collage {
    grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
    align-items: stretch;
  }

  .page-home .hero-side {
    grid-template-rows: repeat(3, minmax(0, 1fr));
  }

  .page-home .hero-main {
    min-height: 480px;
  }

  .page-home .hero-main__body {
    padding: 32px 30px 34px;
  }

  .page-home .ph-split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

  .page-home .ph-split--reverse {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  }

  .page-home .ph-split--reverse .media-frame {
    order: -1;
  }

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

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

  .page-home .ph-section {
    margin-top: 88px;
  }
}

@media (min-width: 1200px) {
  .page-home .hero-main__body {
    padding: 38px 36px 40px;
  }
}