.page-home {
  --home-bleed: clamp(2.5rem, 7vw, 6rem);
  --home-gap: clamp(1.5rem, 3.5vw, 3rem);
  color: var(--sand);
  background: var(--ink);
  overflow-x: clip;
}

.page-home .media-frame {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--obsidian);
}

.page-home .media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-home .display-title {
  margin: 0 0 1.1rem;
  text-shadow: 0 0 24px rgba(139, 75, 255, .55), 0 0 52px rgba(43, 231, 214, .16);
}

/* ---------- 主题声明区 ---------- */

.page-home .home-deck {
  position: relative;
  padding: clamp(2rem, 5.5vw, 3.5rem) 0 clamp(2.5rem, 6vw, 4rem);
  background:
    radial-gradient(115% 85% at 8% -10%, rgba(139, 75, 255, .26), transparent 62%),
    radial-gradient(85% 70% at 102% 6%, rgba(43, 231, 214, .13), transparent 58%),
    var(--ink);
}

.page-home .home-deck__grid {
  align-items: start;
  row-gap: clamp(2rem, 5vw, 3rem);
}

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

.page-home .home-deck__main .display-title {
  max-width: 20ch;
  font-size: clamp(2.1rem, 5.4vw, 3.6rem);
  line-height: 1.12;
}

.page-home .home-deck__clock {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .5rem;
  margin: 1.5rem 0 0;
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .04em;
  color: var(--mist);
}

.page-home .home-deck__side {
  display: grid;
  gap: 1rem;
}

.page-home .home-deck__side .media-frame {
  aspect-ratio: 4 / 5;
}

.page-home .home-deck__side .note {
  margin: 0;
}

/* ---------- 章节目录 ---------- */

.page-home .home-index {
  margin-top: clamp(2rem, 5vw, 3.25rem);
  padding-top: 1.4rem;
  border-top: 1px solid var(--line);
}

.page-home .home-index__list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  padding: 1px;
  background: var(--line-soft);
  border-radius: var(--radius);
}

.page-home .home-index__list > li {
  background: var(--ink);
  border-radius: 4px;
  overflow: hidden;
}

.page-home .home-index .index-link {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  column-gap: .85rem;
  row-gap: .2rem;
  padding: 1rem 1.15rem;
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: background .18s var(--ease), border-color .18s var(--ease);
}

.page-home .home-index .index-link:hover,
.page-home .home-index .index-link:focus-visible,
.page-home .home-index .index-link.is-active,
.page-home .home-index .index-link[aria-current="true"] {
  background: var(--glass-strong);
  border-left-color: var(--cyan);
}

.page-home .home-index .index-link__num {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: .95rem;
  font-weight: 700;
  color: var(--violet);
  letter-spacing: .04em;
}

.page-home .home-index__name {
  display: block;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: .01em;
  color: var(--sand);
}

.page-home .home-index__desc {
  display: block;
  font-family: var(--font-serif);
  font-size: .82rem;
  line-height: 1.6;
  color: var(--mist);
}

@media (min-width: 700px) {
  .page-home .home-index__list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1060px) {
  .page-home .home-index__list {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ---------- 章节通用 ---------- */

.page-home .home-sec {
  position: relative;
  padding: var(--home-bleed) 0;
}

.page-home .home-sec + .home-sec {
  border-top: 1px solid var(--line-soft);
}

.page-home .home-sec .section-head {
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}

.page-home .home-sec--difficulty {
  background: linear-gradient(180deg, rgba(23, 16, 41, .92), rgba(11, 12, 18, 0) 78%), var(--ink);
}

.page-home .home-sec--table {
  background: linear-gradient(180deg, rgba(139, 75, 255, .12), rgba(11, 12, 18, 0) 72%), var(--ink);
}

.page-home .home-sec--rules {
  background: linear-gradient(180deg, rgba(14, 59, 58, .62), rgba(11, 12, 18, 0) 86%), var(--ink);
}

.page-home .home-sec--version {
  background: linear-gradient(180deg, rgba(179, 22, 75, .3), rgba(11, 12, 18, 0) 88%), var(--ink);
}

/* ---------- 01 难度 ---------- */

.page-home .home-diff__grid {
  align-items: start;
  row-gap: 1.5rem;
  margin-bottom: clamp(2rem, 4.5vw, 3rem);
}

.page-home .home-diff__figure {
  margin: 0 0 1.4rem;
}

.page-home .home-diff__figure .media-frame__caption {
  padding: .75rem 1rem 0;
  font-family: var(--font-serif);
  font-size: .82rem;
  color: var(--mist);
}

.page-home .home-diff__lede {
  margin: 0;
  max-width: 62ch;
}

.page-home .home-diff__note {
  padding-top: .4rem;
}

.page-home .home-diff__note .note {
  margin: 0;
  padding-left: 1rem;
  border-left: 2px solid var(--neon);
}

.page-home .scale-strip {
  display: grid;
  grid-template-columns: 1fr;
  gap: .85rem;
}

.page-home .scale-cell {
  position: relative;
  padding: 1.6rem 1.15rem 1.35rem;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(245, 241, 232, .055), rgba(245, 241, 232, .012));
  transition: transform .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}

.page-home .scale-cell::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  border-radius: var(--radius) var(--radius) 0 0;
  background: var(--cell-accent, var(--violet));
  opacity: .5;
  transition: opacity .18s var(--ease), box-shadow .18s var(--ease);
}

.page-home .scale-cell::after {
  content: "";
  display: block;
  margin-top: 1.1rem;
  width: var(--cell-fill, 40%);
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--cell-accent, var(--violet)), transparent);
  opacity: .85;
}

.page-home .scale-cell:hover,
.page-home .scale-cell:focus-visible,
.page-home .scale-cell:focus-within {
  transform: translateY(-2px);
  border-color: var(--line);
  background: var(--glass-strong);
}

.page-home .scale-cell:hover::before,
.page-home .scale-cell:focus-visible::before {
  opacity: 1;
  box-shadow: 0 0 18px var(--cell-accent, var(--violet));
}

.page-home .scale-cell__lvl {
  display: block;
  font-size: .78rem;
  letter-spacing: .14em;
  color: var(--mist);
}

.page-home .scale-cell__name {
  margin: .4rem 0 .5rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: .02em;
  color: var(--sand);
}

.page-home .scale-cell__desc {
  margin: 0;
  font-size: .92rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-home .scale-cell--easy { --cell-accent: var(--neon); --cell-fill: 32%; }
.page-home .scale-cell--std { --cell-accent: var(--cyan); --cell-fill: 52%; }
.page-home .scale-cell--adv { --cell-accent: var(--violet); --cell-fill: 74%; }
.page-home .scale-cell--master { --cell-accent: var(--lava); --cell-fill: 96%; }

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

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

  .page-home .scale-cell {
    border-radius: 0;
    border-right-width: 0;
  }

  .page-home .scale-cell:first-child {
    border-radius: var(--radius) 0 0 var(--radius);
  }

  .page-home .scale-cell:last-child {
    border-right-width: 1px;
    border-radius: 0 var(--radius) var(--radius) 0;
  }

  .page-home .scale-cell:hover,
  .page-home .scale-cell:focus-visible {
    z-index: 2;
  }
}

/* ---------- 02 好友局 ---------- */

.page-home .home-table__grid {
  align-items: start;
  row-gap: clamp(1.75rem, 4vw, 2.5rem);
}

.page-home .home-table__main .lede {
  margin: 0 0 1.75rem;
  max-width: 60ch;
}

.page-home .table-steps {
  list-style: none;
  margin: 0 0 1.9rem;
  padding: 0;
  display: grid;
  gap: .8rem;
}

.page-home .table-steps__item {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: .9rem;
  padding-bottom: .8rem;
  border-bottom: 1px dashed var(--line-soft);
}

.page-home .table-steps__no {
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-home .table-steps__txt {
  font-size: .98rem;
  line-height: 1.7;
  color: var(--sand);
}

.page-home .invite-card {
  display: grid;
  gap: .45rem;
  padding: 1.5rem 1.4rem 1.6rem;
  border: 1px solid rgba(43, 231, 214, .45);
  border-radius: var(--radius);
  background: linear-gradient(140deg, rgba(43, 231, 214, .13), rgba(139, 75, 255, .09));
  transform: rotate(-1.5deg);
  transition: transform .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.page-home .invite-card:hover,
.page-home .invite-card:focus-within {
  transform: rotate(0deg) translateY(-2px);
  border-color: var(--cyan);
  background: linear-gradient(140deg, rgba(43, 231, 214, .2), rgba(139, 75, 255, .14));
}

.page-home .invite-card__label {
  font-family: var(--font-serif);
  font-size: .82rem;
  letter-spacing: .08em;
  color: var(--mist);
}

.page-home .invite-card__code {
  font-size: clamp(1.5rem, 4vw, 2.1rem);
  font-weight: 700;
  letter-spacing: .22em;
  color: var(--neon);
  text-shadow: 0 0 20px rgba(255, 209, 102, .35);
  word-break: break-word;
}

.page-home .invite-card__hint {
  font-size: .86rem;
  line-height: 1.65;
  color: var(--mist);
}

.page-home .home-table__side {
  display: grid;
  gap: 1rem;
}

.page-home .home-table__side .media-frame--table {
  aspect-ratio: 3 / 2;
}

.page-home .home-table__side .media-frame--square {
  aspect-ratio: 1 / 1;
}

/* ---------- 03 规则与禁手 ---------- */

.page-home .home-rules__grid {
  align-items: start;
  row-gap: 1.5rem;
}

.page-home .rule-col {
  padding: 1.5rem 1.35rem 1.6rem;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--glass);
  transition: border-color .18s var(--ease), background .18s var(--ease);
}

.page-home .rule-col:hover {
  border-color: var(--line);
  background: var(--glass-strong);
}

.page-home .rule-col--forbid {
  border-color: rgba(255, 209, 102, .32);
  background: linear-gradient(150deg, rgba(255, 209, 102, .09), rgba(14, 59, 58, .5));
}

.page-home .rule-col__title {
  margin: 0 0 .7rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: .02em;
  color: var(--sand);
}

.page-home .rule-col__body {
  margin: 0;
  font-size: .94rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-home .forbid-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  margin: 1.1rem 0 0;
  padding: 0;
}

.page-home .rule-col--link .btn {
  margin-top: 1.2rem;
}

/* ---------- 04 版本 ---------- */

.page-home .home-version__grid {
  align-items: start;
  row-gap: 1.75rem;
}

.page-home .home-version__main .lede {
  margin: 0 0 1.6rem;
  max-width: 60ch;
}

.page-home .version-chain {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .1rem;
}

.page-home .version-chain__item {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: 1rem;
  padding: .95rem 0;
  border-top: 1px solid var(--line-soft);
}

.page-home .version-chain__item:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-home .version-chain__no {
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--neon);
  white-space: nowrap;
}

.page-home .version-chain__txt {
  font-size: .96rem;
  line-height: 1.7;
  color: var(--sand);
}

.page-home .home-version__side {
  display: grid;
  gap: .9rem;
  align-content: start;
}

.page-home .home-version__side .note {
  margin: 0;
}

.page-home .home-version__side .btn {
  justify-self: start;
}

/* ---------- 05 上手通道 ---------- */

.page-home .home-start__grid {
  align-items: start;
  row-gap: 1.75rem;
}

.page-home .path-list {
  list-style: none;
  counter-reset: path;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-home .path-list__item {
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 1.1rem;
  row-gap: .3rem;
  padding: 1.15rem 0;
  border-top: 1px solid var(--line-soft);
}

.page-home .path-list__item:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-home .path-list__no {
  grid-row: 1 / span 2;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--violet);
  letter-spacing: .06em;
}

.page-home .path-list__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--sand);
}

.page-home .path-list__txt {
  margin: 0;
  font-size: .93rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-home .home-start__side {
  display: grid;
  gap: 1rem;
  align-content: start;
  padding: 1.35rem 1.2rem;
  border-left: 2px solid var(--lava);
  background: var(--glass);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.page-home .home-start__side .note {
  margin: 0;
}

.page-home .home-start__side .btn {
  justify-self: start;
}

/* ---------- 06 断线回桌 ---------- */

.page-home .home-keep__grid {
  align-items: start;
  row-gap: 1.75rem;
}

.page-home .keep-block {
  padding: 1.6rem 1.4rem;
  border: 1px solid rgba(61, 214, 140, .3);
  border-radius: var(--radius);
  background: linear-gradient(140deg, rgba(61, 214, 140, .1), rgba(23, 16, 41, .75));
}

.page-home .keep-block__lead {
  margin: 0 0 .9rem;
  font-family: var(--font-serif);
  font-size: clamp(1.05rem, 2.4vw, 1.3rem);
  line-height: 1.6;
  color: var(--sand);
}

.page-home .keep-block__txt {
  margin: 0;
  font-size: .94rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-home .home-keep__side {
  display: grid;
  gap: 1rem;
  align-content: start;
}

.page-home .home-keep__side .note {
  margin: 0;
  word-break: break-word;
}

.page-home .home-keep__side .btn {
  justify-self: start;
}

/* ---------- 桌面端微调 ---------- */

@media (min-width: 900px) {
  .page-home .home-deck__main {
    padding-right: .5rem;
  }

  .page-home .home-table__side {
    padding-top: .5rem;
  }
}

@media (min-width: 1100px) {
  .page-home .home-deck__main .display-title {
    max-width: 18ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .scale-cell,
  .page-home .invite-card,
  .page-home .rule-col,
  .page-home .home-index .index-link {
    transition: none;
  }

  .page-home .scale-cell:hover,
  .page-home .scale-cell:focus-visible {
    transform: none;
  }
}