.page-home {
  --home-rail: 216px;
  --home-grid-line: rgba(15, 227, 200, 0.07);
  --home-gap: 18px;
}

.page-home .home-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--home-gap);
  padding-block: 22px 72px;
  align-items: start;
}

.page-home .home-shell > * {
  min-width: 0;
}

.page-home .home-body {
  min-width: 0;
  background-image:
    repeating-linear-gradient(0deg, var(--home-grid-line) 0 1px, transparent 1px 48px),
    repeating-linear-gradient(90deg, var(--home-grid-line) 0 1px, transparent 1px 48px);
}

/* ---------- 索引栏 ---------- */

.page-home .home-rail {
  border: var(--line-1);
  background: var(--ink-800);
  padding: 12px 14px 14px;
  transition: border-color var(--dur) var(--ease);
}

.page-home .home-rail[open] {
  border-color: var(--cy-500);
}

.page-home .home-rail__summary {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gry-500);
  cursor: pointer;
  list-style: none;
  padding: 2px 0;
}

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

.page-home .home-rail__summary::before {
  content: "+";
  display: inline-block;
  width: 14px;
  color: var(--cy-500);
}

.page-home .home-rail[open] .home-rail__summary::before {
  content: "−";
}

.page-home .home-rail__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-home .home-rail__list a {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 7px 8px;
  color: var(--gry-300);
  font-size: 14px;
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-home .home-rail__list a:hover,
.page-home .home-rail__list a:focus-visible {
  border-left-color: var(--cy-500);
  background: var(--ink-600);
}

.page-home .home-rail__coord {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--gry-500);
}

.page-home .home-rail__list a:hover .home-rail__coord {
  color: var(--or-500);
}

.page-home .home-rail__foot {
  margin: 14px 0 0;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--gry-500);
}

/* ---------- 区块骨架 ---------- */

.page-home .home-body > .section {
  padding: 30px 0 0;
  border-top: 1px solid var(--ink-600);
  scroll-margin-top: calc(var(--frame-top) + 20px);
  transition: border-color var(--dur) var(--ease);
}

.page-home .home-body > .section:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-home .home-body > .section:target {
  border-top-color: var(--cy-500);
}

.page-home h1,
.page-home h2,
.page-home h3 {
  font-family: var(--font-display);
  color: var(--paper-100);
  letter-spacing: -0.02em;
}

.page-home h1 {
  font-size: clamp(30px, 6.2vw, 42px);
  font-weight: 700;
  line-height: 1.14;
  margin: 10px 0 14px;
}

.page-home h2 {
  font-size: clamp(20px, 3.4vw, 25px);
  font-weight: 600;
  line-height: 1.28;
  margin: 8px 0 0;
}

.page-home h3 {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.35;
  margin: 0;
}

.page-home p {
  color: var(--gry-300);
}

/* ---------- 首屏 ---------- */

.page-home .home-lead__intro {
  max-width: 62ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
}

.page-home .home-lead__keys {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--ink-600);
  border: var(--line-1);
}

.page-home .home-key {
  background: var(--ink-900);
  padding: 14px 16px 16px;
  display: grid;
  gap: 6px;
}

.page-home .home-key__coord {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--or-500);
}

.page-home .home-key__label {
  font-size: 14px;
  color: var(--gry-500);
  line-height: 1.6;
}

/* ---------- S1 窗口状态 ---------- */

.page-home .home-window__track {
  position: relative;
  height: 3px;
  margin: 16px 0 18px;
  background: var(--ink-600);
  overflow: hidden;
}

.page-home .home-window__bar {
  display: block;
  height: 100%;
  width: 63%;
  background: linear-gradient(90deg, var(--or-500) 0%, var(--cy-500) 100%);
  animation: home-window-fill 5s var(--ease) forwards;
}

@keyframes home-window-fill {
  from { width: 8%; }
  to { width: 63%; }
}

.page-home .home-window__stages {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--ink-600);
  border: var(--line-1);
}

.page-home .home-window__stage {
  background: var(--ink-800);
  padding: 14px 14px 16px;
  display: grid;
  gap: 5px;
  border-left: 2px solid transparent;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-home .home-window__stage:hover {
  background: var(--ink-900);
  border-left-color: var(--cy-500);
}

.page-home .home-window__stage.is-current {
  background: var(--ink-900);
  border-left-color: var(--or-500);
}

.page-home .home-window__time {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--cy-500);
}

.page-home .home-window__stage.is-current .home-window__time {
  color: var(--or-500);
}

.page-home .home-window__name {
  font-size: 14px;
  color: var(--paper-100);
}

.page-home .home-window__desc {
  font-size: 12.5px;
  color: var(--gry-500);
  line-height: 1.6;
}

.page-home .home-window__note {
  margin: 18px 0 0;
}

.page-home .home-window__note a {
  color: var(--cy-500);
}

/* ---------- S2 栏目入口 ---------- */

.page-home .home-chapters {
  position: relative;
}

.page-home .home-chapters__bg {
  position: absolute;
  inset: 0;
  margin: 0;
  overflow: hidden;
  opacity: 0.16;
  pointer-events: none;
  z-index: 0;
}

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

.page-home .home-chapters > *:not(.home-chapters__bg) {
  position: relative;
  z-index: 1;
}

.page-home .home-chapters__hint {
  margin: 10px 0 0;
  max-width: 62ch;
  font-size: 14px;
  color: var(--gry-500);
}

.page-home .home-chapters__wrap {
  margin-top: 18px;
  overflow-x: auto;
  border: var(--line-1);
  background: rgba(6, 18, 15, 0.72);
}

.page-home .home-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.page-home .home-table caption {
  caption-side: top;
  text-align: left;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--gry-500);
  border-bottom: 1px solid var(--ink-600);
}

.page-home .home-table th {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--gry-500);
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--ink-600);
  white-space: nowrap;
}

.page-home .home-table td {
  padding: 13px 14px;
  border-bottom: 1px solid var(--ink-600);
  color: var(--gry-300);
  vertical-align: top;
  line-height: 1.6;
}

.page-home .home-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-home .home-table td.num {
  font-family: var(--font-mono);
  color: var(--cy-500);
  letter-spacing: 0.06em;
}

.page-home .home-table tbody td:first-child {
  border-left: 2px solid transparent;
  transition: border-color var(--dur) var(--ease);
}

.page-home .home-table tbody tr:hover td {
  background: var(--ink-800);
}

.page-home .home-table tbody tr:hover td:first-child {
  border-left-color: var(--cy-500);
}

.page-home .home-table a {
  color: var(--cy-500);
  text-decoration: none;
  border-bottom: 1px solid var(--ink-600);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-home .home-table a:hover,
.page-home .home-table a:focus-visible {
  border-bottom-color: var(--cy-500);
}

/* ---------- S3 数据摘要 ---------- */

.page-home .home-figures__grid {
  display: grid;
  gap: var(--home-gap);
  margin-top: 18px;
}

.page-home .home-figures__stats {
  display: grid;
  gap: 1px;
  background: var(--ink-600);
  border: var(--line-1);
}

.page-home .home-stat {
  background: var(--ink-900);
  padding: 16px 16px 18px;
  display: grid;
  gap: 6px;
}

.page-home .home-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 4.6vw, 30px);
  font-variant-numeric: tabular-nums;
  color: var(--cy-500);
  letter-spacing: -0.01em;
}

.page-home .home-stat__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gry-500);
}

.page-home .home-stat__note {
  font-size: 13px;
  color: var(--gry-500);
  line-height: 1.7;
}

.page-home .home-figures__media {
  margin: 0;
}

.page-home .home-figures__cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin: 20px 0 0;
}

.page-home .home-figures__cta-note {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gry-500);
}

/* ---------- S4 回访捷径 ---------- */

.page-home .home-return__grid {
  display: grid;
  gap: var(--home-gap);
  margin-top: 18px;
}

.page-home .home-return__card {
  background: var(--ink-800);
  border: var(--line-1);
  border-left: 2px solid var(--ink-600);
  padding: 16px 16px 20px;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-home .home-return__card:hover {
  border-left-color: var(--cy-500);
  background: var(--ink-900);
}

.page-home .home-return__card--quiet {
  border-left-color: var(--or-500);
  background: var(--ink-900);
}

.page-home .home-return__coord {
  display: block;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--gry-500);
  margin-bottom: 8px;
}

.page-home .home-return__title {
  font-size: 17px;
  margin-bottom: 10px;
}

.page-home .home-return__list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 7px;
  color: var(--gry-300);
  font-size: 14px;
  line-height: 1.6;
}

.page-home .home-return__list li::marker {
  color: var(--cy-500);
  font-family: var(--font-mono);
}

.page-home .home-return__card--quiet p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--gry-300);
}

/* ---------- S5 版本轨迹 ---------- */

.page-home .home-versions__media {
  margin: 18px 0 0;
}

.page-home .home-version-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--ink-600);
  border: var(--line-1);
}

.page-home .home-version-list__item {
  background: var(--ink-900);
  padding: 15px 16px 18px;
  display: grid;
  gap: 7px;
  border-top: 2px solid var(--ink-600);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-home .home-version-list__item:hover {
  border-top-color: var(--cy-500);
  background: var(--ink-800);
}

.page-home .home-version-list__item.is-current {
  border-top-color: var(--or-500);
}

.page-home .home-version-list__time {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--gry-500);
}

.page-home .home-version-list__item.is-current .home-version-list__time {
  color: var(--or-500);
}

.page-home .home-version-list__name {
  font-size: 16px;
}

.page-home .home-version-list__item p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--gry-500);
}

.page-home .home-versions__foot {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.7;
}

/* ---------- S6 两步路径 ---------- */

.page-home .home-two-step__grid {
  display: grid;
  gap: var(--home-gap);
  margin-top: 18px;
}

.page-home .home-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--ink-600);
  border: var(--line-1);
}

.page-home .home-step {
  background: var(--ink-800);
  padding: 16px;
  display: grid;
  grid-template-columns: 40px 1fr;
  column-gap: 14px;
  row-gap: 5px;
  align-items: start;
}

.page-home .home-step__n {
  grid-row: 1 / 3;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1.1;
  color: var(--or-500);
  letter-spacing: -0.01em;
}

.page-home .home-step__title {
  font-size: 17px;
}

.page-home .home-step__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--gry-500);
}

.page-home .home-two-step__media {
  margin: 0;
}

.page-home .home-two-step__cta {
  margin: 20px 0 0;
}

/* ---------- 收尾说明 ---------- */

.page-home .home-close {
  margin: 34px 0 0;
}

.page-home .home-close a {
  color: var(--cy-500);
}

/* ---------- 断点 ---------- */

@media (max-width: 899px) {
  .page-home .home-rail__list {
    grid-auto-flow: column;
    grid-auto-columns: max-content;
    overflow-x: auto;
    gap: 6px;
    padding-bottom: 4px;
  }

  .page-home .home-rail__list a {
    border-left: 0;
    border-bottom: 2px solid transparent;
    white-space: nowrap;
  }

  .page-home .home-rail__list a:hover,
  .page-home .home-rail__list a:focus-visible {
    border-bottom-color: var(--cy-500);
  }

  .page-home .home-table {
    min-width: 680px;
  }
}

@media (max-width: 599px) {
  .page-home .home-lead__intro,
  .page-home .home-chapters__hint {
    font-size: 15px;
  }

  .page-home .home-step {
    grid-template-columns: 30px 1fr;
    column-gap: 10px;
  }

  .page-home .home-step__n {
    font-size: 16px;
  }
}

@media (min-width: 640px) {
  .page-home .home-lead__keys {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-home .home-window__stages {
    grid-template-columns: repeat(5, 1fr);
  }

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

@media (min-width: 900px) {
  .page-home .home-shell {
    grid-template-columns: var(--home-rail) minmax(0, 1fr);
    column-gap: 32px;
  }

  .page-home .home-rail {
    position: sticky;
    top: calc(var(--frame-top) + 18px);
  }

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

@media (min-width: 1080px) {
  .page-home .home-body > .section {
    padding-top: 40px;
  }

  .page-home .home-figures__grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

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

  .page-home .home-two-step__grid {
    grid-template-columns: 8fr 4fr;
    align-items: start;
  }

  .page-home .home-chapters__wrap {
    border-left: 0;
    border-right: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .home-window__bar {
    animation: none;
    width: 63%;
  }

  .page-home *,
  .page-home *::before,
  .page-home *::after {
    transition: none;
    animation: none;
  }
}
<<<END>>>