.page-home {
  background-color: var(--ink);
  background-image:
    radial-gradient(1100px 520px at 84% -6%, rgba(201, 162, 74, 0.10), transparent 68%),
    radial-gradient(760px 420px at 4% 18%, rgba(79, 179, 166, 0.06), transparent 70%),
    repeating-linear-gradient(to right, var(--grid) 0 1px, transparent 1px 76px),
    repeating-linear-gradient(to bottom, var(--grid) 0 1px, transparent 1px 76px);
}

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

/* ---------- 封面 ---------- */
.page-home .cover {
  padding-top: clamp(2rem, 5vw, 4rem);
  padding-bottom: clamp(2.5rem, 6vw, 5rem);
}

.page-home .cover__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2.25rem;
  align-items: center;
}

.page-home .cover__kicker {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
  margin: 0 0 1.1rem;
}

.page-home .cover__kicker-sep {
  width: 34px;
  height: 1px;
  background: var(--gold);
}

.page-home .cover__kicker-text {
  font-family: var(--font-body);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-home .cover__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.1rem, 7.4vw, 4.4rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-home .cover__title-accent {
  color: var(--gold);
  margin: 0 0.1em;
  position: relative;
}

.page-home .cover__title-accent::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.06em;
  height: 3px;
  background: linear-gradient(90deg, var(--gold), rgba(201, 162, 74, 0));
}

.page-home .cover__lede {
  margin: 1.4rem 0 0;
  max-width: 44ch;
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-home .cover__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.75rem;
}

.page-home .cover__figure {
  margin: 0;
  border: 1px solid var(--gold);
  background: var(--hold);
  box-shadow: var(--shadow-hard);
}

.page-home .cover__figure-cap {
  padding: 0.7rem 0.9rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--mist);
}

/* 封面索引 */
.page-home .cover__index {
  list-style: none;
  margin: clamp(2.25rem, 5vw, 3.5rem) 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-home .cover__index-item {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1.05rem 0;
  border-bottom: 1px solid var(--line);
}

.page-home .cover__index-no {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-home .cover__index-link {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.12rem;
  line-height: 1.35;
  color: var(--white);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.22s ease, border-color 0.22s ease;
}

.page-home .cover__index-link:hover,
.page-home .cover__index-link:focus-visible {
  color: var(--gold-hi);
  border-bottom-color: var(--gold);
}

.page-home .cover__index-who {
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--mist);
}

@media (min-width: 900px) {
  .page-home .cover__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(2rem, 4vw, 4rem);
  }
}

@media (min-width: 760px) {
  .page-home .cover__index {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-home .cover__index-item {
    padding: 1.4rem 1.4rem 1.4rem 0;
    border-bottom: 0;
    border-right: 1px solid var(--line);
  }

  .page-home .cover__index-item + .cover__index-item {
    padding-left: 1.4rem;
  }

  .page-home .cover__index-item:last-child {
    border-right: 0;
    padding-right: 0;
  }
}

/* ---------- 章节头 ---------- */
.page-home .section-head {
  max-width: 58ch;
  margin-bottom: clamp(1.75rem, 3.5vw, 2.75rem);
}

.page-home .section-head h2 {
  margin: 0.7rem 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.65rem, 3.6vw, 2.6rem);
  line-height: 1.15;
  letter-spacing: -0.015em;
  color: var(--white);
}

.page-home .section-sub {
  margin: 0.85rem 0 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 四条主路径 ---------- */
.page-home .routes {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-home .route-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.1rem;
}

.page-home .route-card {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  padding: 1.5rem 1.25rem 1.25rem;
  background: var(--hold);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-hard);
  transition: border-color 0.24s ease, transform 0.24s ease, box-shadow 0.24s ease;
}

.page-home .route-card:hover,
.page-home .route-card:focus-within {
  border-color: var(--gold);
  transform: translateY(-4px);
  box-shadow: 6px 10px 0 rgba(0, 0, 0, 0.6);
}

.page-home .route-card__no {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.2em;
  color: var(--gold);
}

.page-home .route-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.18rem;
  line-height: 1.35;
  color: var(--white);
}

.page-home .route-card__who {
  margin: 0;
  padding-bottom: 0.7rem;
  border-bottom: 1px dashed var(--line);
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--amber);
}

.page-home .route-card__text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-home .route-card__act {
  margin-top: auto;
  padding-top: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: var(--gold-hi);
  text-decoration: none;
  transition: color 0.2s ease, gap 0.2s ease;
}

.page-home .route-card__act:hover,
.page-home .route-card__act:focus-visible {
  color: var(--amber);
  gap: 0.65rem;
}

.page-home .routes__underlay {
  margin: clamp(2rem, 4vw, 3rem) 0 0;
  border: 1px solid var(--line);
  background: var(--ink);
  box-shadow: var(--shadow-soft);
}

.page-home .routes__underlay img {
  width: 100%;
}

.page-home .routes__underlay-cap {
  padding: 0.7rem 0.95rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--mist);
}

@media (min-width: 560px) {
  .page-home .route-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1040px) {
  .page-home .route-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 新手第一落点 ---------- */
.page-home .start {
  scroll-margin-top: calc(var(--header-h) + 1rem);
}

.page-home .start-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2.25rem;
  align-items: start;
}

.page-home .steps {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
  display: grid;
  gap: 1.1rem;
}

.page-home .step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 1rem;
  padding: 1.2rem 1.15rem;
  background: var(--hold);
  border-left: 2px solid var(--gold);
  box-shadow: var(--shadow-soft);
}

.page-home .step__no {
  display: grid;
  place-items: center;
  width: 2.35rem;
  height: 2.35rem;
  border: 1px solid var(--gold);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--gold);
}

.page-home .step__title {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--white);
}

.page-home .step__text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-home .start__hint {
  margin: 0 0 1.4rem;
  padding: 0.9rem 1.05rem;
  border: 1px dashed var(--line);
  font-size: 0.85rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-home .start__figure {
  margin: 0;
  border: 1px solid var(--gold);
  background: var(--hold);
  box-shadow: var(--shadow-hard);
}

.page-home .start__figure-cap {
  padding: 0.7rem 0.9rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--mist);
}

@media (min-width: 900px) {
  .page-home .start-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(2rem, 4vw, 3.5rem);
  }
}

/* ---------- 版本与运行 ---------- */
.page-home .version {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-home .version-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2.25rem;
  align-items: center;
}

.page-home .version-strip {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-home .ver-cell {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1.35rem 1.2rem;
  background: var(--ink);
}

.page-home .ver-cell--key {
  background: var(--hold);
}

.page-home .ver-cell__label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-home .ver-cell__num {
  font-family: var(--font-mono);
  font-size: 1.55rem;
  letter-spacing: 0.02em;
  color: var(--gold);
}

.page-home .ver-cell--key .ver-cell__num {
  font-size: 2rem;
  color: var(--amber);
}

.page-home .ver-cell__note {
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-home .version__figure {
  margin: 0;
  border: 1px solid var(--gold);
  background: var(--hold);
  box-shadow: var(--shadow-hard);
}

.page-home .version__figure-cap {
  padding: 0.7rem 0.9rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--mist);
}

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

@media (min-width: 900px) {
  .page-home .version-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(2rem, 4vw, 3.5rem);
  }
}

/* ---------- 最近更新 ---------- */
.page-home .latest-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2.5rem;
}

.page-home .latest__sub {
  margin: 0 0 1.1rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--gold);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--white);
}

.page-home .feed {
  list-style: none;
  margin: 0 0 1.4rem;
  padding: 0;
}

.page-home .feed-item {
  padding: 0.95rem 0;
  border-bottom: 1px solid var(--line);
}

.page-home .feed-item__meta {
  display: inline-block;
  margin-bottom: 0.55rem;
  padding: 0.16rem 0.55rem;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-home .feed-item__link {
  display: block;
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--white);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-home .feed-item__link:hover,
.page-home .feed-item__link:focus-visible {
  color: var(--gold-hi);
  border-bottom-color: var(--gold);
}

.page-home .qa {
  list-style: none;
  margin: 0 0 1.4rem;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.page-home .qa-item {
  padding: 1.1rem 1.15rem;
  background: var(--hold);
  border: 1px solid var(--line);
  border-left: 2px solid var(--teal);
}

.page-home .qa-item__q {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--white);
}

.page-home .qa-item__a {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-home .latest__tail {
  margin: clamp(2rem, 4vw, 3rem) 0 0;
  padding-top: 1.35rem;
  border-top: 1px solid var(--line);
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-home .latest__tail a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 162, 74, 0.45);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-home .latest__tail a:hover,
.page-home .latest__tail a:focus-visible {
  color: var(--gold-hi);
  border-bottom-color: var(--gold-hi);
}

@media (min-width: 900px) {
  .page-home .latest-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: clamp(2rem, 4vw, 3.5rem);
  }
}

/* ---------- 窄屏保护 ---------- */
@media (max-width: 420px) {
  .page-home .cover__title {
    font-size: 1.95rem;
  }

  .page-home .cover__actions .btn,
  .page-home .start__body .btn,
  .page-home .latest__col .btn {
    width: 100%;
    text-align: center;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-home .route-card,
  .page-home .route-card__act,
  .page-home .cover__index-link,
  .page-home .feed-item__link {
    transition: none;
  }

  .page-home .route-card:hover {
    transform: none;
  }
}