.page-home {
  --home-gap: clamp(14px, 3.6vw, 26px);
  --home-pad: clamp(48px, 8vw, 96px);
  background: var(--bg);
  color: var(--text);
}

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

.page-home [id] {
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.page-home a:focus-visible,
.page-home button:focus-visible,
.page-home summary:focus-visible {
  outline: 2px solid var(--c-amber);
  outline-offset: 2px;
}

/* ===== 上下文条 ===== */
.page-home .home-context {
  background: var(--c-ink-900);
  border-bottom: 1px solid var(--line);
}

.page-home .home-context-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 14px;
  min-height: 46px;
  padding-block: 6px;
}

.page-home .home-stamp {
  margin: 0;
  color: var(--c-slate);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* ===== 首屏 ===== */
.page-home .home-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(24px, 5vw, 56px) clamp(40px, 7vw, 88px);
  background: linear-gradient(164deg, var(--c-ink-800) 0 44%, var(--c-ink-900) 44% 100%);
}

.page-home .hero-slab {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(
    164deg,
    transparent 0 43.6%,
    rgba(242, 162, 58, 0.45) 43.6% 44%,
    transparent 44% 100%
  );
}

.page-home .hero-shell {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(22px, 4vw, 34px);
  grid-template-areas:
    "copy"
    "grid"
    "visual"
    "band";
}

.page-home .hero-copy {
  grid-area: copy;
}

.page-home .hero-copy .eyebrow {
  margin: 0;
}

.page-home .hero-copy h1 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(30px, 7.6vw, 54px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin: 12px 0 0;
  color: var(--c-frost);
}

.page-home .hero-lead {
  margin: 16px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-frost);
  opacity: 0.82;
}

.page-home .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.page-home .hero-grid-wrap {
  grid-area: grid;
}

.page-home .six-head {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 12px;
}

.page-home .six-head .eyebrow {
  margin: 0;
}

.page-home .six-note {
  margin: 0;
  max-width: 42em;
  font-size: 14px;
  line-height: 1.65;
  color: var(--c-slate);
}

.page-home .six-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
}

.page-home .six-card {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-height: 78px;
  padding: 11px 12px 12px;
  border: 1px solid var(--line);
  background: var(--c-ink-800);
  color: var(--c-frost);
  text-decoration: none;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-home .six-card:hover,
.page-home .six-card:focus-visible {
  background: var(--c-ink-700);
  border-color: var(--c-amber);
}

.page-home .six-num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--c-amber);
}

.page-home .six-name {
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.3;
}

.page-home .six-use {
  font-size: 12px;
  line-height: 1.5;
  color: var(--c-slate);
  transition: color var(--dur) var(--ease);
}

.page-home .six-card:hover .six-use,
.page-home .six-card:focus-visible .six-use {
  color: var(--c-frost);
}

.page-home .hero-visual {
  grid-area: visual;
  margin: 0;
}

.page-home .hero-visual img {
  display: block;
  width: 100%;
  background: var(--c-ink-800);
}

.page-home .hero-band {
  grid-area: band;
  margin: 0;
  max-width: 720px;
}

.page-home .hero-band .media-caption {
  color: var(--c-slate);
}

/* ===== 两套走法 ===== */
.page-home .home-switch {
  padding-block: var(--home-pad);
  background: var(--c-paper);
  color: var(--c-ink-900);
}

.page-home .switch-shell {
  display: grid;
  gap: clamp(26px, 4.4vw, 44px);
}

.page-home .home-switch .eyebrow {
  margin: 0;
  color: var(--c-moss);
}

.page-home .switch-head h2 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(24px, 4.6vw, 40px);
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin: 10px 0 0;
  color: var(--c-ink-900);
}

.page-home .switch-intro {
  margin: 14px 0 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-ink-700);
}

.page-home .switch-pair {
  display: grid;
  gap: 14px;
}

.page-home .switch-lane {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(20px, 3.6vw, 30px);
  border: 1px solid rgba(11, 21, 36, 0.16);
  border-top: 3px solid var(--c-amber);
  background: rgba(255, 255, 255, 0.34);
}

.page-home .switch-lane--celadon {
  border-top-color: var(--c-celadon);
}

.page-home .lane-tag {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-ink-900);
  opacity: 0.6;
}

.page-home .switch-lane h3 {
  margin: 0;
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--c-ink-900);
}

.page-home .switch-lane p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-ink-700);
}

.page-home .lane-list {
  list-style: none;
  margin: 2px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-home .lane-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  padding-top: 8px;
  border-top: 1px solid rgba(11, 21, 36, 0.12);
  font-size: 14px;
  line-height: 1.65;
  color: var(--c-ink-700);
}

.page-home .lane-list li span:first-child {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-clay);
  padding-top: 3px;
}

.page-home .switch-lane--celadon .lane-list li span:first-child {
  color: var(--c-moss);
}

.page-home .switch-figure {
  margin: 0;
}

.page-home .home-switch .media-caption {
  color: var(--c-ink-700);
}

/* ===== 日常回访 ===== */
.page-home .home-return {
  padding-block: var(--home-pad);
  background: var(--c-ink-900);
}

.page-home .return-shell {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-home .return-copy .eyebrow {
  margin: 0;
}

.page-home .return-copy h2 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(24px, 4.4vw, 38px);
  line-height: 1.14;
  letter-spacing: -0.015em;
  margin: 10px 0 0;
  color: var(--c-frost);
}

.page-home .return-lead {
  margin: 16px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-slate);
}

.page-home .return-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-home .return-list li {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-frost);
  opacity: 0.9;
}

.page-home .return-list strong {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--c-celadon);
}

.page-home .return-details {
  margin-top: 22px;
  border: 1px solid var(--line);
  background: var(--c-ink-800);
}

.page-home .return-details summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 48px;
  padding: 12px 16px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 700;
  color: var(--c-frost);
}

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

.page-home .return-details summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--c-amber);
}

.page-home .return-details[open] summary::after {
  content: "−";
}

.page-home .return-details p {
  margin: 0;
  padding: 0 16px 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-slate);
}

.page-home .return-cta {
  margin: 22px 0 0;
}

.page-home .return-figure {
  margin: 0;
}

.page-home .return-figure .media-caption {
  color: var(--c-slate);
}

/* ===== 版本与维护 ===== */
.page-home .home-steady {
  padding-block: var(--home-pad);
  background-color: var(--c-ink-800);
  background-image:
    linear-gradient(to right, rgba(233, 238, 245, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(233, 238, 245, 0.05) 1px, transparent 1px);
  background-size: 32px 32px;
}

.page-home .steady-head .eyebrow {
  margin: 0;
}

.page-home .steady-head h2 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(24px, 4.4vw, 38px);
  line-height: 1.14;
  letter-spacing: -0.015em;
  margin: 10px 0 0;
  color: var(--c-frost);
}

.page-home .steady-intro {
  margin: 14px 0 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-slate);
}

.page-home .steady-grid {
  display: grid;
  gap: 0;
  margin-top: clamp(26px, 4.4vw, 44px);
  border-top: 1px solid var(--line);
}

.page-home .steady-item {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.page-home .steady-tag {
  display: block;
  margin-bottom: 8px;
  color: var(--c-amber);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-home .steady-item h3 {
  margin: 0;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--c-frost);
}

.page-home .steady-item p {
  margin: 8px 0 0;
  max-width: 32em;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-slate);
}

/* ===== 求助路径 ===== */
.page-home .home-help {
  padding-block: var(--home-pad);
  background: var(--c-ink-900);
}

.page-home .help-head .eyebrow {
  margin: 0;
}

.page-home .help-head h2 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(24px, 4.4vw, 38px);
  line-height: 1.14;
  letter-spacing: -0.015em;
  margin: 10px 0 0;
  color: var(--c-frost);
}

.page-home .help-intro {
  margin: 14px 0 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-slate);
}

.page-home .help-pair {
  display: grid;
  gap: 12px;
  margin-top: clamp(24px, 4vw, 36px);
}

.page-home .help-card {
  display: flex;
  flex-direction: column;
  min-height: 44px;
  padding: clamp(20px, 3.4vw, 30px);
  border: 1px solid var(--line);
  background: var(--c-ink-800);
  color: var(--c-frost);
  text-decoration: none;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-home .help-card:hover,
.page-home .help-card:focus-visible {
  background: var(--c-ink-700);
  border-color: var(--c-celadon);
}

.page-home .help-card--accent {
  border-color: rgba(242, 162, 58, 0.55);
}

.page-home .help-card--accent:hover,
.page-home .help-card--accent:focus-visible {
  border-color: var(--c-amber);
}

.page-home .help-tag {
  display: block;
  margin-bottom: 10px;
  color: var(--c-amber);
  font-size: 12px;
  letter-spacing: 0.14em;
}

.page-home .help-card h3 {
  margin: 0;
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.3;
}

.page-home .help-card p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-slate);
}

.page-home .help-go {
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-celadon);
}

.page-home .help-card--accent .help-go {
  color: var(--c-amber);
}

.page-home .help-contact {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  margin-top: 16px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  background: var(--c-ink-800);
}

.page-home .help-contact-label {
  color: var(--c-slate);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.page-home .help-mail {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--c-frost);
  word-break: break-all;
}

/* ===== 回到当前索引 ===== */
.page-home .home-jump {
  position: fixed;
  right: 14px;
  bottom: 76px;
  z-index: 30;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid var(--c-amber);
  background: var(--c-ink-700);
  color: var(--c-frost);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-home .home-jump:hover,
.page-home .home-jump:focus-visible {
  background: var(--c-amber);
  color: var(--on-accent);
}

.page-home .home-jump:hover .coord,
.page-home .home-jump:focus-visible .coord {
  color: var(--on-accent);
}

/* ===== 断点 ===== */
@media (min-width: 720px) {
  .page-home .six-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
  }

  .page-home .steady-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-home .steady-item:nth-child(odd) {
    padding-right: 32px;
  }

  .page-home .steady-item:nth-child(even) {
    padding-left: 32px;
    border-left: 1px solid var(--line);
  }
}

@media (min-width: 820px) {
  .page-home .switch-pair {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0;
  }

  .page-home .switch-lane--celadon {
    border-left: 0;
  }

  .page-home .switch-lane + .switch-lane {
    margin-left: -1px;
  }

  .page-home .help-pair {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 900px) {
  .page-home .hero-shell {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    grid-template-areas:
      "copy visual"
      "grid grid"
      "band band";
    column-gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }

  .page-home .hero-visual img {
    clip-path: polygon(9% 0, 100% 0, 100% 100%, 0 100%);
  }

  .page-home .hero-band {
    justify-self: center;
  }

  .page-home .return-shell {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.86fr);
  }

  .page-home .home-jump {
    right: 28px;
    bottom: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .six-card,
  .page-home .help-card,
  .page-home .home-jump {
    transition: none;
  }
}