.page-home {
  --home-stripe: linear-gradient(90deg, var(--sand-deep) 0%, rgba(227, 207, 176, 0) 92%);
  --home-tex: radial-gradient(rgba(27, 21, 18, .05) 1px, transparent 1px);
  background: var(--sand);
  color: var(--ink);
}

.page-home a {
  color: inherit;
}

/* ---------- 首屏 ---------- */
.page-home .hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 86% 0%, #F8F0E2 0%, rgba(243, 231, 211, 0) 62%),
    var(--sand);
  border-bottom: 1px solid var(--line-brass-soft);
}

.page-home .hero__media {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  opacity: .16;
  pointer-events: none;
}

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

.page-home .hero__frame {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 32px var(--gutter) 40px;
  box-sizing: border-box;
}

.page-home .hero__crumb {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-home .hero .eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--teal);
}

.page-home .hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(30px, 7.2vw, 52px);
  line-height: 1.16;
  letter-spacing: .04em;
  color: var(--ink);
}

.page-home .hero__lede {
  margin: 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

.page-home .hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-home .hero__facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 28px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--line-teal);
}

.page-home .hero__fact {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.page-home .hero__fact dt {
  font-size: 13px;
  color: var(--muted);
}

.page-home .hero__fact dd {
  margin: 0;
  font-weight: 700;
  font-size: 15px;
  color: var(--teal-dark);
}

/* 右侧索引 */
.page-home .hero__index {
  position: relative;
  padding: 18px 16px 14px;
  background: rgba(251, 245, 234, .72);
  border: 1px solid var(--line-brass-soft);
  border-radius: var(--radius);
  box-shadow: var(--paper-shadow);
}

.page-home .hero__index-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-brass);
}

.page-home .hero__index-title {
  font-weight: 700;
  font-size: 15px;
  letter-spacing: .06em;
}

.page-home .hero__index-range {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--amber-deep);
}

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

.page-home .index-list__item + .index-list__item {
  border-top: 1px solid var(--line-teal);
}

.page-home .index-link {
  display: grid;
  grid-template-columns: 34px 1fr 18px;
  align-items: center;
  gap: 10px;
  padding: 12px 6px;
  text-decoration: none;
  transition: background .12s ease, box-shadow .12s ease;
}

.page-home .index-link:hover,
.page-home .index-link:focus-visible {
  background: var(--sand-deep);
}

.page-home .index-link:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

.page-home .index-link__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--amber-deep);
}

.page-home .index-link__text {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.page-home .index-link__label {
  font-weight: 700;
  font-size: 16px;
  color: var(--ink);
}

.page-home .index-link__meta {
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
}

.page-home .index-link__go {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--teal);
  text-align: right;
}

.page-home .hero__index-foot {
  margin: 12px 0 0;
  padding-top: 10px;
  border-top: 1px solid var(--line-brass-soft);
  font-size: 13px;
  color: var(--muted);
}

.page-home .hero__index-foot strong {
  font-family: var(--font-mono);
  color: var(--amber-deep);
}

.page-home .hero__index-foot a {
  color: var(--teal);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 章节锚点条 ---------- */
.page-home .anchor-bar {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 0 var(--gutter);
  background: var(--card);
  border-bottom: 1px solid var(--line-brass-soft);
  scrollbar-width: thin;
}

.page-home .anchor-bar__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 12px;
  font-size: 13px;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color .12s ease, border-color .12s ease;
}

.page-home .anchor-bar__link:hover,
.page-home .anchor-bar__link:focus-visible {
  color: var(--teal-dark);
  border-bottom-color: var(--teal);
}

.page-home .anchor-bar__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--amber-deep);
}

/* ---------- 章节通用 ---------- */
.page-home .chapter {
  background-color: var(--sand);
  background-image: var(--home-tex);
  background-size: 4px 4px;
  scroll-margin-top: 72px;
}

.page-home .chapter--versions {
  background-color: var(--card);
}

.page-home .chapter__tape {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 9px var(--gutter);
  background: var(--home-stripe), var(--sand-deep);
  border-top: 1px solid var(--line-brass-soft);
  border-bottom: 1px solid var(--line-brass-soft);
}

.page-home .chapter__tape--deep {
  background: var(--teal-dark);
  border-color: rgba(201, 162, 39, .34);
}

.page-home .chapter__tape--teal {
  background: var(--teal);
  border-color: rgba(251, 245, 234, .3);
}

.page-home .chapter__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--amber-deep);
}

.page-home .chapter__num--on-dark {
  color: var(--amber);
}

.page-home .chapter__name {
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--teal-dark);
}

.page-home .chapter__tape--deep .chapter__name,
.page-home .chapter__tape--teal .chapter__name {
  color: var(--card);
}

.page-home .chapter__body {
  padding: 34px var(--gutter) 46px;
}

.page-home .chapter__title {
  margin: 0 0 14px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(22px, 4.6vw, 32px);
  line-height: 1.32;
  letter-spacing: .02em;
  color: var(--ink);
}

.page-home .chapter__lede,
.page-home .versions__text,
.page-home .login__text {
  margin: 0 0 14px;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

.page-home .versions__text strong,
.page-home .zone__list strong {
  color: var(--ink);
}

/* ---------- 图 ---------- */
.page-home .home-figure {
  margin: 22px 0 0;
}

.page-home .home-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line-brass-soft);
  box-shadow: var(--paper-shadow);
}

.page-home .home-figure__caption {
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}

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

.page-home .home-figure--wide img {
  aspect-ratio: 21 / 9;
}

.page-home .home-figure--square img {
  aspect-ratio: 1 / 1;
}

/* ---------- 十字索引区 ---------- */
.page-home .cross {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-home .cross__aside,
.page-home .cross__main {
  min-width: 0;
}

.page-home .axis {
  padding: 14px 14px 12px;
  background: var(--card);
  border: 1px solid var(--line-brass-soft);
  border-radius: var(--radius);
}

.page-home .axis__cap {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--teal);
}

.page-home .axis__list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-home .axis__item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px 10px;
  background: var(--sand);
  border-left: 2px solid var(--brass);
}

.page-home .axis__ver {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--teal-dark);
}

.page-home .axis__tag {
  font-size: 12px;
  color: var(--muted);
}

.page-home .axis__note {
  margin: 10px 0 0;
  font-size: 12px;
  color: var(--muted);
}

.page-home .cat-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  border-top: 1px solid var(--line-teal);
}

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

.page-home .cat__link {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 12px;
  padding: 15px 6px;
  text-decoration: none;
  transition: background .12s ease;
}

.page-home .cat__link:hover,
.page-home .cat__link:focus-visible {
  background: var(--card);
}

.page-home .cat__link:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: -2px;
}

.page-home .cat__num {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: .04em;
  color: var(--amber-deep);
}

.page-home .cat__body {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-home .cat__name {
  font-weight: 700;
  font-size: 17px;
  color: var(--ink);
}

.page-home .cat__desc {
  font-size: 14px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 版本 ---------- */
.page-home .versions {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-home .versions__intro,
.page-home .timeline {
  min-width: 0;
}

.page-home .versions__intro .btn {
  margin-top: 8px;
}

.page-home .timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 4px;
}

.page-home .timeline__item {
  position: relative;
  padding: 0 0 22px 26px;
  border-left: 1px solid var(--line-teal);
}

.page-home .timeline__item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-home .timeline__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--sand-deep);
  border: 1px solid var(--brass);
  transition: background .2s ease, border-color .2s ease;
}

.page-home .timeline__item:hover::before {
  background: var(--amber);
  border-color: var(--amber-deep);
}

.page-home .timeline__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 5px;
}

.page-home .timeline__ver {
  font-family: var(--font-mono);
  font-size: 17px;
  letter-spacing: .05em;
  color: var(--amber-deep);
}

.page-home .timeline__step {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-home .timeline__note {
  margin: 0;
  max-width: 34em;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

.page-home .timeline__item:hover .timeline__note {
  color: var(--ink);
}

/* ---------- 玩法专区 ---------- */
.page-home .zone {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-home .zone__text,
.page-home .zone__side {
  min-width: 0;
}

.page-home .zone__list {
  list-style: none;
  margin: 18px 0 22px;
  padding: 0;
}

.page-home .zone__item {
  display: grid;
  grid-template-columns: 62px 1fr;
  gap: 12px;
  align-items: baseline;
  padding: 12px 0;
  border-top: 1px solid var(--line-teal);
}

.page-home .zone__item:last-child {
  border-bottom: 1px solid var(--line-teal);
}

.page-home .zone__num {
  font-family: var(--font-mono);
  font-size: 24px;
  line-height: 1.1;
  letter-spacing: .02em;
  color: var(--teal-dark);
}

.page-home .zone__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-home .zone__side .home-figure {
  margin-top: 0;
}

.page-home .zone__note {
  margin-top: 14px;
  padding: 14px 16px;
  background: var(--card);
  border-left: 2px solid var(--teal);
  border-radius: var(--radius);
}

.page-home .zone__note-title {
  margin: 0 0 6px;
  font-weight: 700;
  font-size: 14px;
  color: var(--teal-dark);
}

.page-home .zone__note-text {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 登录 ---------- */
.page-home .login {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-home .login__intro,
.page-home .login__panel {
  min-width: 0;
}

.page-home .steps {
  background: var(--card);
  border: 1px solid var(--line-brass-soft);
  border-radius: var(--radius);
  box-shadow: var(--paper-shadow);
}

.page-home .steps__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  font-size: 15px;
  color: var(--teal-dark);
}

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

.page-home .steps__summary:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: -2px;
}

.page-home .steps__hint::before {
  content: "＋";
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--teal);
}

.page-home .steps[open] .steps__hint::before {
  content: "－";
}

.page-home .steps__list {
  list-style: none;
  margin: 0;
  padding: 0 16px 16px;
  border-top: 1px solid var(--line-teal);
}

.page-home .steps__item {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 10px;
  padding: 11px 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
  border-bottom: 1px dashed var(--line-teal);
}

.page-home .steps__item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-home .steps__no {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.9;
  color: var(--amber-deep);
}

/* ---------- 更新与联系 ---------- */
.page-home .stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin: 24px 0 28px;
  padding: 0;
  list-style: none;
  background: var(--line-teal);
  border: 1px solid var(--line-teal);
}

.page-home .stats__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 14px;
  background: var(--sand);
}

.page-home .stats__num {
  font-family: var(--font-mono);
  font-size: 28px;
  line-height: 1.1;
  letter-spacing: .02em;
  color: var(--teal-dark);
}

.page-home .stats__cap {
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.page-home .contact-block {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  padding: 22px 18px;
  background: var(--teal-dark);
  border-radius: var(--radius);
}

.page-home .contact-block__lead {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(251, 245, 234, .86);
}

.page-home .contact-block__line {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  color: var(--card);
  word-break: break-word;
}

.page-home .contact-block__key {
  display: inline-block;
  min-width: 74px;
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--teal-mist);
}

.page-home .contact-block__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.page-home .contact-block__actions .btn--ghost {
  border-color: rgba(201, 162, 39, .6);
  color: var(--card);
}

.page-home .contact-block__actions .btn--ghost:hover {
  border-color: var(--amber);
  color: var(--amber);
}

.page-home .contact-block__actions .btn--link {
  color: var(--teal-mist);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-home .hero__facts {
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
  }

  .page-home .hero__fact {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding-right: 16px;
  }

  .page-home .hero__fact + .hero__fact {
    padding-left: 16px;
    border-left: 1px solid var(--line-teal);
  }

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

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

@media (min-width: 900px) {
  .page-home .hero__media {
    width: min(64%, 760px);
    opacity: .32;
  }

  .page-home .hero__frame {
    grid-template-columns: 5fr 7fr;
    align-items: start;
    gap: 0;
    padding: 52px var(--gutter) 58px;
  }

  .page-home .hero__lead {
    padding-right: 40px;
  }

  .page-home .hero__index {
    padding: 22px 24px 18px;
    border-left: 1px solid var(--line-brass);
    background: rgba(251, 245, 234, .82);
  }

  .page-home .chapter__body {
    padding: 52px var(--gutter) 68px;
  }

  .page-home .cross {
    grid-template-columns: 4fr 8fr;
    gap: 40px;
    align-items: start;
  }

  .page-home .cross__aside {
    padding-right: 8px;
    border-right: 1px solid var(--line-brass-soft);
  }

  .page-home .versions {
    grid-template-columns: 5fr 7fr;
    gap: 44px;
    align-items: start;
  }

  .page-home .zone {
    grid-template-columns: 7fr 5fr;
    gap: 44px;
    align-items: start;
  }

  .page-home .zone__side {
    padding-left: 24px;
    border-left: 1px solid var(--line-brass-soft);
  }

  .page-home .login {
    grid-template-columns: 5fr 7fr;
    gap: 44px;
    align-items: start;
  }

  .page-home .contact-block {
    grid-template-columns: 1fr auto;
    align-items: center;
    padding: 26px 28px;
  }
}

@media (min-width: 1180px) {
  .page-home .hero__frame {
    padding-left: 0;
    padding-right: 0;
  }

  .page-home .chapter__body {
    padding-left: 0;
    padding-right: 0;
  }

  .page-home .anchor-bar {
    padding-left: max(0px, calc((100vw - var(--shell)) / 2));
    padding-right: max(0px, calc((100vw - var(--shell)) / 2));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .index-link,
  .page-home .cat__link,
  .page-home .anchor-bar__link,
  .page-home .timeline__item::before {
    transition: none;
  }
}