.page-home {
  --home-pad: clamp(2.4rem, 6vw, 4.8rem);
  --home-gap: clamp(1rem, 3vw, 2rem);
  display: block;
}

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

/* ---------- 上下文定位条 ---------- */
.page-home .locator {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  padding-top: clamp(1.4rem, 4vw, 2.6rem);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--muted);
}

.page-home .locator .mono {
  color: var(--cyan);
  font-size: 0.72rem;
}

.page-home .locator__sep {
  color: var(--line);
}

/* ---------- 首屏：索引轨道 + 主题声明 ---------- */
.page-home .hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.4rem, 4vw, 2.6rem);
  padding-top: clamp(1.4rem, 3.6vw, 2.4rem);
  padding-bottom: clamp(2rem, 5vw, 3.4rem);
}

.page-home .rail__title {
  margin: 0 0 0.7rem;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.page-home .rail__list {
  display: flex;
  gap: 0.45rem;
  margin: 0;
  padding: 0 0 0.4rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-home .rail__link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.5rem 0.8rem;
  white-space: nowrap;
  font-size: 0.84rem;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-home .rail__num {
  font-size: 0.68rem;
  color: var(--cyan);
}

.page-home .rail__link:hover,
.page-home .rail__link:focus-visible {
  color: var(--text);
  border-color: var(--cyan);
}

.page-home .hero-canvas {
  position: relative;
  min-width: 0;
}

.page-home .hero-mark {
  display: inline-block;
  padding: 0.42rem 0.85rem;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: #fff;
  background: var(--grad);
  border-radius: var(--radius-s);
}

.page-home h1 {
  margin: 1.05rem 0 0;
  font-size: clamp(2.1rem, 7.4vw, 4.2rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.page-home h1 em {
  font-style: normal;
  color: var(--cyan);
}

.page-home .hero-canvas .lede {
  max-width: 34em;
  margin: 1.1rem 0 0;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--muted);
}

.page-home .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.5rem;
}

.page-home .hero-figure {
  position: relative;
  margin: clamp(1.6rem, 4vw, 2.6rem) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  overflow: hidden;
  background:
    radial-gradient(circle at 82% 12%, rgba(47, 243, 225, 0.16), transparent 58%),
    radial-gradient(circle at 12% 88%, rgba(124, 77, 255, 0.22), transparent 56%),
    var(--ink-800);
}

.page-home .hero-figure img {
  width: 100%;
  object-fit: cover;
}

.page-home .hero-figure::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 34%;
  height: 3px;
  background: var(--grad);
}

/* ---------- 通用章节节奏 ---------- */
.page-home .section {
  padding-block: var(--home-pad);
}

.page-home .section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--line-soft);
}

.page-home .section__title {
  margin: 0;
  font-size: clamp(1.35rem, 3.4vw, 2rem);
  line-height: 1.3;
}

.page-home .section__meta {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ---------- 关卡索引 ---------- */
.page-home .index-figure,
.page-home .changes-figure {
  margin: clamp(1.2rem, 3vw, 1.8rem) 0 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-m);
  overflow: hidden;
  background: var(--ink-800);
}

.page-home .index-figure img,
.page-home .changes-figure img {
  width: 100%;
  object-fit: cover;
}

.page-home .index-figure figcaption,
.page-home .changes-figure figcaption {
  padding: 0.75rem 1rem;
  font-size: 0.76rem;
  line-height: 1.7;
  color: var(--muted);
  border-top: 1px solid var(--line-soft);
}

.page-home .cat-band {
  margin-top: clamp(1.2rem, 3vw, 1.7rem);
}

.page-home .cat-band__hint {
  margin: 0 0 0.6rem;
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.page-home .cat-band .tag-list {
  flex-wrap: wrap;
  gap: 0.45rem;
}

.page-home .index-note {
  max-width: 36em;
  margin: clamp(1.3rem, 3vw, 1.9rem) 0 0;
  padding-left: 1rem;
  border-left: 3px solid var(--orange);
  font-size: 0.95rem;
  line-height: 1.9;
  color: var(--muted);
}

.page-home .level-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
  margin-top: clamp(1.4rem, 3.4vw, 2rem);
}

.page-home .level-card {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 1.15rem 1.1rem 1.25rem;
  text-decoration: none;
  color: inherit;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-m);
  background: linear-gradient(170deg, var(--ink-800) 0%, var(--ink-700) 100%);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-home .level-card:hover,
.page-home .level-card:focus-visible {
  transform: translateY(-3px);
  border-color: var(--cyan);
}

.page-home .level-card__cat {
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-home .level-card__title {
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.45;
}

.page-home .level-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.35rem 0.6rem;
  margin: 0.15rem 0 0;
  padding: 0.65rem 0 0;
  list-style: none;
  border-top: 1px dashed var(--line);
  font-size: 0.74rem;
}

.page-home .level-meta li {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.page-home .level-meta__k {
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-home .level-meta__v {
  color: var(--text);
}

.page-home .index-more {
  margin: 1.6rem 0 0;
}

/* ---------- 网页端说明横幅 ---------- */
.page-home .banner-block {
  padding-block: clamp(2.2rem, 6vw, 3.8rem);
  border-block: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(13, 26, 43, 0.9), var(--ink-900));
}

.page-home .banner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.2rem, 3vw, 2rem);
  padding: clamp(1.35rem, 3.4vw, 2.4rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  background: var(--ink-800);
  overflow: hidden;
}

.page-home .banner::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: clamp(90px, 26%, 240px);
  height: 3px;
  background: var(--orange);
  transform: skewX(-24deg);
  transform-origin: left center;
}

.page-home .banner__label {
  position: absolute;
  top: 1rem;
  right: 1rem;
  padding: 0.3rem 0.65rem;
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  color: var(--ink-900);
  background: var(--orange);
  border-radius: var(--radius-s);
}

.page-home .banner__text h2 {
  margin: 0.6rem 0 0;
  max-width: 20em;
  font-size: clamp(1.25rem, 3.2vw, 1.85rem);
  line-height: 1.35;
}

.page-home .banner__text p {
  max-width: 32em;
  margin: 0.9rem 0 0;
  font-size: 0.95rem;
  line-height: 1.9;
  color: var(--muted);
}

.page-home .banner__text .btn {
  margin-top: 1.3rem;
}

.page-home .banner-figure {
  margin: 0;
  border-radius: var(--radius-m);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  background: var(--ink-900);
}

.page-home .banner-figure img {
  width: 100%;
  object-fit: cover;
}

.page-home .fold {
  margin-top: 1rem;
}

.page-home .fold__item {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-m);
  background: var(--ink-800);
  overflow: hidden;
}

.page-home .fold__item + .fold__item {
  margin-top: 0.65rem;
}

.page-home .fold__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  padding: 1rem 1.1rem;
  font-family: inherit;
  font-size: 0.98rem;
  font-weight: 600;
  text-align: left;
  color: var(--text);
  background: none;
  border: 0;
  cursor: pointer;
}

.page-home .fold__trigger:hover {
  color: var(--cyan);
}

.page-home .fold__icon {
  flex: none;
  font-family: var(--font-mono);
  color: var(--cyan);
  transition: transform var(--dur) var(--ease);
}

.page-home .fold__trigger[aria-expanded="true"] .fold__icon {
  transform: rotate(45deg);
}

.page-home .fold__inner {
  padding: 0 1.1rem 1.15rem;
  font-size: 0.92rem;
  line-height: 1.9;
  color: var(--muted);
}

.page-home .fold__inner p {
  margin: 0 0 0.7rem;
}

.page-home .step-list {
  margin: 0 0 0.9rem;
  padding-left: 1.15rem;
}

.page-home .step-list li {
  margin-bottom: 0.4rem;
  color: var(--text);
}

.page-home .dot-list {
  margin: 0 0 0.9rem;
  padding-left: 1.1rem;
}

.page-home .dot-list li {
  margin-bottom: 0.4rem;
}

.page-home .link-more {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 243, 225, 0.35);
  padding-bottom: 1px;
}

.page-home .link-more:hover,
.page-home .link-more:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 变更摘要 ---------- */
.page-home .change-list {
  margin: clamp(1.2rem, 3vw, 1.8rem) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
}

.page-home .change-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.45rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-home .change-row__no {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-home .change-row__body h3 {
  margin: 0;
  font-size: 1rem;
  line-height: 1.5;
}

.page-home .change-row__body p {
  margin: 0.35rem 0 0;
  font-size: 0.86rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-home .change-row .tag {
  justify-self: start;
}

.page-home .changes-more {
  margin: 1.3rem 0 0;
  font-size: 0.9rem;
  line-height: 1.9;
  color: var(--muted);
}

/* ---------- 典型处境 ---------- */
.page-home .scene-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
  margin-top: clamp(1.2rem, 3vw, 1.8rem);
}

.page-home .scene {
  position: relative;
  padding: 1.3rem 1.15rem 1.35rem;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-m);
  background:
    linear-gradient(155deg, rgba(124, 77, 255, 0.18), transparent 62%),
    var(--ink-800);
}

.page-home .scene__no {
  display: block;
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-home .scene h3 {
  margin: 0.55rem 0 0;
  font-size: 1.02rem;
  line-height: 1.5;
}

.page-home .scene p {
  margin: 0.6rem 0 0;
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--muted);
}

.page-home .scene .scene__out {
  margin-top: 0.9rem;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--line);
  color: var(--green);
  font-size: 0.84rem;
}

/* ---------- 规模与节奏 ---------- */
.page-home .scale-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.2rem, 3vw, 2rem);
  margin-top: clamp(1.2rem, 3vw, 1.8rem);
}

.page-home .stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-home .stat {
  padding: 1.05rem 0.95rem;
  background: var(--ink-900);
}

.page-home .stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 4vw, 1.75rem);
  font-weight: 500;
  line-height: 1.15;
  color: var(--cyan);
}

.page-home .stat-label {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.74rem;
  line-height: 1.6;
  color: var(--muted);
}

.page-home .scale-note {
  padding: 1.25rem 1.15rem 1.35rem;
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius-m);
  background: var(--ink-800);
}

.page-home .scale-note__title {
  margin: 0 0 0.7rem;
  font-size: 1rem;
  letter-spacing: 0.02em;
}

.page-home .scale-note p {
  margin: 0 0 0.8rem;
  font-size: 0.9rem;
  line-height: 1.9;
  color: var(--muted);
}

.page-home .scale-note__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.2rem;
  margin-bottom: 0;
  font-size: 0.86rem;
}

/* ---------- 收尾 ---------- */
.page-home .closing {
  margin-top: clamp(1.6rem, 4vw, 2.6rem);
  padding-top: clamp(1.2rem, 3vw, 1.8rem);
  border-top: 1px solid var(--line-soft);
}

.page-home .closing__text {
  max-width: 34em;
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.9;
  color: var(--text);
}

.page-home .closing__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.7rem 1.2rem;
  margin: 1.1rem 0 0;
  font-size: 0.86rem;
}

/* ---------- 桌面布局 ---------- */
@media (min-width: 720px) {
  .page-home .level-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .page-home .change-row {
    grid-template-columns: 92px minmax(0, 1fr) 130px;
    align-items: start;
    gap: 1rem;
  }

  .page-home .change-row .tag {
    justify-self: end;
  }
}

@media (min-width: 1024px) {
  .page-home .hero-grid {
    grid-template-columns: minmax(150px, 196px) minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.6rem);
  }

  .page-home .rail {
    position: sticky;
    top: 6.5rem;
    align-self: start;
  }

  .page-home .rail__list {
    flex-direction: column;
    gap: 0.1rem;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--line);
  }

  .page-home .rail__link {
    padding: 0.55rem 0 0.55rem 0.9rem;
    border: 0;
    border-radius: 0;
    font-size: 0.88rem;
    position: relative;
  }

  .page-home .rail__link::before {
    content: "";
    position: absolute;
    left: -1px;
    top: 0.5rem;
    bottom: 0.5rem;
    width: 2px;
    background: var(--cyan);
    transform: scaleY(0);
    transform-origin: top center;
    transition: transform var(--dur) var(--ease);
  }

  .page-home .rail__link:hover::before,
  .page-home .rail__link:focus-visible::before {
    transform: scaleY(1);
  }

  .page-home .banner {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    align-items: center;
    padding-right: clamp(1.6rem, 3vw, 2.4rem);
  }

  .page-home .banner__label {
    top: 1.4rem;
    right: 1.6rem;
  }

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

  .page-home .level-card:nth-child(even) {
    margin-top: 0.9rem;
  }

  .page-home .scale-layout {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .level-card,
  .page-home .rail__link,
  .page-home .fold__icon,
  .page-home .rail__link::before {
    transition: none;
  }
}