.page-home {
  --ph-line: rgba(207, 198, 179, 0.5);
  --ph-shadow: 0 1px 0 rgba(36, 31, 26, 0.04), 0 16px 30px -24px rgba(36, 31, 26, 0.42);
  --ph-shadow-lift: 0 1px 0 rgba(36, 31, 26, 0.05), 0 22px 40px -26px rgba(36, 31, 26, 0.5);
  display: block;
  background: var(--paper);
}

.page-home .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.08em;
}

/* ---------- 首屏：门口 ---------- */
.page-home .threshold {
  position: relative;
  overflow: hidden;
  background: var(--paper);
  padding: calc(var(--header-h) + clamp(2.25rem, 7vw, 4.5rem)) 0 clamp(2.75rem, 8vw, 5.5rem);
}

.page-home .threshold-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(to right, var(--ph-line) 0 1px, transparent 1px 8.3333%),
    repeating-linear-gradient(to bottom, var(--ph-line) 0 1px, transparent 1px 88px);
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, rgba(0, 0, 0, 0.35) 55%, transparent 88%);
  mask-image: linear-gradient(to bottom, #000 0%, rgba(0, 0, 0, 0.35) 55%, transparent 88%);
  opacity: 0.75;
}

.page-home .threshold-shaft {
  position: absolute;
  top: -25%;
  right: -18%;
  width: 78%;
  height: 155%;
  pointer-events: none;
  transform: rotate(-2.5deg);
  background:
    radial-gradient(58% 52% at 68% 32%, rgba(240, 194, 100, 0.09), transparent 72%),
    linear-gradient(101deg, transparent 33%, rgba(255, 238, 202, 0.14) 45%, rgba(240, 194, 100, 0.07) 52%, transparent 63%);
  animation: ph-shaft 600ms var(--ease) both;
}

@keyframes ph-shaft {
  from { opacity: 0; transform: rotate(-2.5deg) translateX(-10px); }
  to { opacity: 1; transform: rotate(-2.5deg) translateX(0); }
}

.page-home .threshold-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 6vw, 2.75rem);
}

.page-home .threshold-axis {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.page-home .axis-line {
  display: block;
  width: 2.25rem;
  height: 1px;
  background: linear-gradient(to right, var(--cinnabar), rgba(180, 69, 46, 0));
}

.page-home .axis-line:last-child { display: none; }

.page-home .axis-text {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  letter-spacing: 0.32em;
  color: var(--cinnabar);
  white-space: nowrap;
}

.page-home .threshold-body .breadcrumb { margin-bottom: 1.5rem; }

.page-home .threshold-kicker {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 1rem;
  font-family: var(--font-serif);
  font-size: 0.95rem;
  letter-spacing: 0.24em;
  color: var(--ink-soft);
}

.page-home .kicker-rule {
  display: inline-block;
  width: 1.75rem;
  height: 1px;
  background: var(--cinnabar);
}

.page-home .threshold-title {
  margin: 0 0 1.1rem;
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: clamp(2.05rem, 8.2vw, 3.9rem);
  line-height: 1.16;
  letter-spacing: 0.01em;
  color: var(--ink);
  text-wrap: balance;
}

.page-home .threshold-lede {
  max-width: 34rem;
  margin: 0 0 1.75rem;
  font-family: var(--font-sans);
  font-size: clamp(0.98rem, 2.6vw, 1.06rem);
  line-height: 1.9;
  color: var(--ink-soft);
}

.page-home .threshold-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.1rem;
  align-items: center;
}

.page-home .threshold-note {
  max-width: 30rem;
  margin: 1rem 0 0;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--ink-soft);
  opacity: 0.85;
}

.page-home .threshold-figure {
  margin: 0;
  border: 1px solid var(--rule);
  padding: 0.5rem;
  background: var(--paper-edge);
  box-shadow: var(--ph-shadow);
}

.page-home .threshold-figure img,
.page-home .ph-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: 1px;
}

/* ---------- 通用块 ---------- */
.page-home .gate,
.page-home .scope,
.page-home .updates,
.page-home .versions {
  padding: clamp(3rem, 9vw, 6.25rem) 0;
}

.page-home .gate-head,
.page-home .section-head {
  max-width: 44rem;
  margin-bottom: clamp(1.75rem, 5vw, 2.75rem);
}

.page-home .section-num {
  margin: 0 0 0.85rem;
  font-size: 0.74rem;
  letter-spacing: 0.3em;
  color: var(--cinnabar);
}

.page-home .section-title {
  margin: 0 0 0.9rem;
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: clamp(1.5rem, 5.2vw, 2.35rem);
  line-height: 1.32;
  color: var(--ink);
  text-wrap: balance;
}

.page-home .section-lede {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 0.98rem;
  line-height: 1.9;
  color: var(--ink-soft);
}

.page-home .ph-figure {
  margin: 0;
  border: 1px solid var(--rule);
  padding: 0.45rem;
  background: var(--paper);
  box-shadow: var(--ph-shadow);
}

.page-home .ph-figcap {
  margin: 0.75rem 0 0;
  padding: 0 0.25rem 0.35rem;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* ---------- 门内目录 ---------- */
.page-home .gate {
  background: var(--paper-edge);
  position: relative;
}

.page-home .gate::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--cinnabar) 22%, rgba(180, 69, 46, 0.15) 78%, transparent);
}

.page-home .gate-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 5vw, 2.5rem);
}

.page-home .dir-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.page-home .dir-item {
  position: relative;
  display: grid;
  grid-template-columns: 2.6rem minmax(0, 1fr);
  gap: 0.75rem;
  padding: 1rem 1.1rem 1rem 0.9rem;
  background: var(--paper);
  border-left: 2px solid transparent;
  box-shadow: var(--ph-shadow);
  transition: border-color var(--fast) var(--ease), box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-home .dir-item:hover,
.page-home .dir-item:focus-within {
  border-left-color: var(--cinnabar);
  box-shadow: var(--ph-shadow-lift);
  transform: translateY(-1px);
}

.page-home .dir-item--current {
  border-left-color: var(--cinnabar);
  background: linear-gradient(to right, rgba(240, 194, 100, 0.12), var(--paper) 42%);
}

.page-home .dir-num {
  font-size: 1.05rem;
  line-height: 1.5;
  color: var(--cinnabar);
  padding-top: 0.15rem;
}

.page-home .dir-title {
  margin: 0 0 0.4rem;
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(1.05rem, 3.6vw, 1.22rem);
  line-height: 1.5;
  color: var(--ink);
}

.page-home .dir-link {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid rgba(180, 69, 46, 0.35);
  transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease);
}

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

.page-home .dir-desc {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-home .dir-hint {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 0.82rem;
  line-height: 1.75;
  color: var(--celadon);
  transition: max-height var(--dur) var(--ease), opacity var(--fast) linear, margin-top var(--dur) var(--ease);
}

.page-home .dir-item:hover .dir-hint,
.page-home .dir-item:focus-within .dir-hint {
  max-height: 6rem;
  opacity: 1;
  margin-top: 0.5rem;
}

.page-home .gate-aside {
  display: grid;
  gap: 1.25rem;
  align-content: start;
}

.page-home .gate-aside-note {
  margin: 0;
  padding: 0.9rem 1rem;
  border-left: 2px solid var(--celadon);
  background: rgba(74, 122, 105, 0.07);
  font-size: 0.85rem;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* ---------- 服务范围三步 ---------- */
.page-home .scope {
  background: var(--paper);
  position: relative;
}

.page-home .scope-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 5vw, 2.5rem);
  align-items: start;
}

.page-home .scope-figure { margin-bottom: 1.5rem; }

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

.page-home .scope-step {
  position: relative;
  padding: 1.1rem 1.15rem 1.2rem;
  background: var(--paper-edge);
  border-top: 1px solid var(--rule);
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  border-left: 3px solid var(--celadon);
  transition: background var(--dur) var(--ease);
}

.page-home .scope-step:hover { background: #EDE6D7; }

.page-home .scope-num {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 1.35rem;
  line-height: 1;
  color: var(--celadon);
}

.page-home .scope-step-title {
  margin: 0 0 0.5rem;
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 1.08rem;
  line-height: 1.6;
  color: var(--ink);
}

.page-home .scope-step p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-home .scope-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.9rem 1.25rem;
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
}

.page-home .scope-foot-note {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--celadon);
}

/* ---------- 移动端更新 ---------- */
.page-home .updates {
  background: var(--paper-edge);
}

.page-home .upd-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
  clip-path: inset(50%);
}

.page-home .upd-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.page-home .upd-tab {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  padding: 0.42rem 0.85rem;
  font-family: var(--font-sans);
  font-size: 0.83rem;
  color: var(--ink-soft);
  background: var(--paper);
  border: 1px solid var(--rule);
  cursor: pointer;
  transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease), background var(--fast) var(--ease);
}

.page-home .upd-tab:hover { border-color: var(--cinnabar); color: var(--cinnabar); }

.page-home .upd-tab .num { font-size: 0.76rem; opacity: 0.75; }

.page-home #ph-upd-all:checked ~ .upd-tabs .upd-tab--all,
.page-home #ph-upd-nav:checked ~ .upd-tabs .upd-tab--nav,
.page-home #ph-upd-index:checked ~ .upd-tabs .upd-tab--index,
.page-home #ph-upd-table:checked ~ .upd-tabs .upd-tab--table,
.page-home #ph-upd-read:checked ~ .upd-tabs .upd-tab--read {
  color: var(--paper);
  background: var(--cinnabar);
  border-color: var(--cinnabar);
}

.page-home #ph-upd-all:focus-visible ~ .upd-tabs .upd-tab--all,
.page-home #ph-upd-nav:focus-visible ~ .upd-tabs .upd-tab--nav,
.page-home #ph-upd-index:focus-visible ~ .upd-tabs .upd-tab--index,
.page-home #ph-upd-table:focus-visible ~ .upd-tabs .upd-tab--table,
.page-home #ph-upd-read:focus-visible ~ .upd-tabs .upd-tab--read {
  outline: 2px solid var(--cinnabar);
  outline-offset: 2px;
}

.page-home #ph-upd-nav:checked ~ .upd-body .upd-item:not([data-kind="nav"]),
.page-home #ph-upd-index:checked ~ .upd-body .upd-item:not([data-kind="index"]),
.page-home #ph-upd-table:checked ~ .upd-body .upd-item:not([data-kind="table"]),
.page-home #ph-upd-read:checked ~ .upd-body .upd-item:not([data-kind="read"]) {
  display: none;
}

.page-home .upd-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 5vw, 2.5rem);
  align-items: start;
}

.page-home .upd-list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 1.15rem;
  display: grid;
  gap: 0.85rem;
  border-left: 1px solid var(--rule);
}

.page-home .upd-item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.35rem 0.9rem;
  padding: 0.9rem 1rem 1rem;
  background: var(--paper);
  box-shadow: var(--ph-shadow);
}

.page-home .upd-item::before {
  content: "";
  position: absolute;
  left: -1.42rem;
  top: 1.35rem;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--celadon);
  border: 1px solid var(--paper-edge);
}

.page-home .upd-seq {
  grid-column: 1 / -1;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--ink-soft);
  opacity: 0.8;
}

.page-home .upd-main { grid-column: 1; }

.page-home .upd-title {
  margin: 0 0 0.35rem;
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--ink);
}

.page-home .upd-main p {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-home .upd-item .label { align-self: start; white-space: nowrap; }

.page-home .upd-aside {
  display: grid;
  gap: 1.1rem;
  align-content: start;
}

/* ---------- 版本对照 ---------- */
.page-home .versions {
  background: var(--paper);
}

.page-home .ver-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.15rem;
  counter-reset: ver;
}

.page-home .ver-step {
  position: relative;
  padding: 1.15rem 1.2rem 1.25rem;
  background: var(--paper);
  border: 1px solid var(--rule);
  box-shadow: var(--ph-shadow);
}

.page-home .ver-step::after {
  content: "";
  position: absolute;
  left: 1.2rem;
  bottom: -1.15rem;
  width: 1px;
  height: 1.15rem;
  background: var(--cinnabar);
  opacity: 0.4;
}

.page-home .ver-step:last-child::after { display: none; }

.page-home .ver-num {
  display: block;
  margin-bottom: 0.55rem;
  font-family: var(--font-serif);
  font-size: 1.7rem;
  line-height: 1;
  color: var(--cinnabar);
}

.page-home .ver-step-title {
  margin: 0 0 0.5rem;
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 1.06rem;
  line-height: 1.6;
  color: var(--ink);
}

.page-home .ver-step p {
  margin: 0;
  font-size: 0.87rem;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-home .ver-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.9rem 1.4rem;
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
}

.page-home .ver-foot-note {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

/* ---------- 联系条 ---------- */
.page-home .doorway {
  background: var(--ink);
  color: var(--paper);
  padding: clamp(2.75rem, 8vw, 5rem) 0;
}

.page-home .doorway-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 5vw, 3rem);
}

.page-home .doorway-eyebrow {
  margin: 0 0 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.3em;
  color: var(--amber);
}

.page-home .doorway-title {
  margin: 0 0 0.9rem;
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: clamp(1.5rem, 5.2vw, 2.25rem);
  line-height: 1.32;
  color: var(--paper);
  text-wrap: balance;
}

.page-home .doorway-text {
  margin: 0 0 1.5rem;
  max-width: 32rem;
  font-size: 0.94rem;
  line-height: 1.9;
  color: rgba(246, 241, 231, 0.78);
}

.page-home .doorway-list {
  margin: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid rgba(246, 241, 231, 0.18);
}

.page-home .doorway-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.35rem;
  padding: 1rem 0;
  border-bottom: 1px solid rgba(246, 241, 231, 0.18);
}

.page-home .doorway-row dt {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-home .doorway-row dd {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem 0.85rem;
}

.page-home .doorway-value {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--paper);
  word-break: break-word;
}

.page-home .doorway .copy-btn {
  padding: 0.2rem 0.6rem;
  font-family: var(--font-sans);
  font-size: 0.74rem;
  color: rgba(246, 241, 231, 0.82);
  background: transparent;
  border: 1px solid rgba(246, 241, 231, 0.32);
  cursor: pointer;
  transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease);
}

.page-home .doorway .copy-btn:hover,
.page-home .doorway .copy-btn:focus-visible {
  color: var(--amber);
  border-color: var(--amber);
}

/* ---------- 焦点可见 ---------- */
.page-home a:focus-visible,
.page-home button:focus-visible,
.page-home label:focus-visible,
.page-home input:focus-visible {
  outline: 2px solid var(--cinnabar);
  outline-offset: 2px;
}

.page-home .doorway a:focus-visible,
.page-home .doorway button:focus-visible {
  outline-color: var(--amber);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-home .dir-list { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.65rem; }
  .page-home .dir-item { grid-template-columns: 2.4rem minmax(0, 1fr); }
  .page-home .upd-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-home .doorway-row { grid-template-columns: 9rem minmax(0, 1fr); align-items: baseline; }
}

@media (min-width: 960px) {
  .page-home .threshold-inner {
    grid-template-columns: 3rem minmax(0, 1.12fr) minmax(0, 0.95fr);
    column-gap: clamp(1.5rem, 3.4vw, 3rem);
    align-items: center;
  }

  .page-home .threshold-axis {
    flex-direction: column;
    align-items: flex-start;
    align-self: stretch;
    padding-top: 0.4rem;
  }

  .page-home .axis-line {
    width: 1px;
    height: 4rem;
    background: linear-gradient(to bottom, var(--cinnabar), rgba(180, 69, 46, 0));
  }

  .page-home .axis-line:last-child { display: block; flex: 1; }

  .page-home .axis-text {
    writing-mode: vertical-rl;
    letter-spacing: 0.34em;
  }

  .page-home .gate-body { grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr); }
  .page-home .dir-list { grid-template-columns: 1fr; }

  .page-home .scope-body { grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr); }
  .page-home .scope-steps { gap: 0; }
  .page-home .scope-step { border-left-width: 3px; }

  .page-home .upd-body { grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); }

  .page-home .ver-steps { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.5rem; }
  .page-home .ver-step::after {
    left: auto;
    right: -1.5rem;
    bottom: auto;
    top: 2.4rem;
    width: 1.5rem;
    height: 1px;
  }

  .page-home .doorway-inner { grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); }
}

@media (max-width: 699px) {
  .page-home .dir-hint {
    max-height: none;
    opacity: 1;
    margin-top: 0.5rem;
  }

  .page-home .threshold { padding-top: calc(var(--header-h) + 1.75rem); }
  .page-home .threshold-figure { margin-top: 0.25rem; }
  .page-home .upd-item::before { left: -1.36rem; }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .threshold-shaft { animation: none; }
  .page-home .threshold-shaft,
  .page-home .dir-item,
  .page-home .dir-hint,
  .page-home .scope-step,
  .page-home .upd-tab {
    transition-property: opacity, background-color, border-color, color;
    transition-duration: 0.01ms;
  }
  .page-home .dir-item:hover,
  .page-home .dir-item:focus-within { transform: none; }
}