.page-home {
  --home-pad: clamp(1.1rem, 5vw, 3.25rem);
  --home-pad-left: var(--home-pad);
  --home-pad-right: var(--home-pad);
  --home-block: clamp(3rem, 8vw, 6rem);
  display: block;
  position: relative;
  background: var(--ink);
  color: var(--paper);
  padding-left: var(--home-pad-left);
  padding-right: var(--home-pad-right);
  overflow-x: hidden;
  overflow-x: clip;
}

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

.page-home .band {
  margin-left: calc(-1 * var(--home-pad-left));
  margin-right: calc(-1 * var(--home-pad-right));
  padding-left: var(--home-pad-left);
  padding-right: var(--home-pad-right);
}

.page-home .band--paper {
  background: var(--paper);
  color: var(--black);
}

.page-home .band--deep {
  background: var(--ink-deep);
}

/* ---------- context ---------- */
.page-home .page-context {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  padding-top: clamp(1.5rem, 4vw, 2.5rem);
  color: var(--mist);
}

.page-home .page-context__item {
  font-size: .74rem;
  letter-spacing: .16em;
}

.page-home .page-context__sep {
  color: var(--coral);
  font-size: .74rem;
}

/* ---------- shared typography ---------- */
.page-home .eyebrow,
.page-home .section-kicker {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  margin: 0 0 .95rem;
  color: var(--cyan);
}

.page-home .section-head {
  max-width: 44rem;
  margin-bottom: clamp(1.7rem, 4vw, 2.8rem);
}

.page-home .section-title {
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(1.55rem, 4.6vw, 2.5rem);
  line-height: 1.26;
  letter-spacing: .025em;
  margin: 0 0 1rem;
}

.page-home .section-lede {
  margin: 0;
  font-size: 1rem;
  line-height: 1.8;
  max-width: 36ch;
  color: rgba(242, 239, 230, .78);
}

.page-home .band--paper .section-lede,
.page-home .band--paper .zones__dims p {
  color: rgba(10, 15, 22, .74);
}

.page-home .band--paper .section-kicker {
  color: var(--moss);
}

.page-home p {
  line-height: 1.8;
}

/* ---------- buttons ---------- */
.page-home .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: .7rem 1.45rem;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  font-size: .95rem;
  letter-spacing: .05em;
  text-decoration: none;
  transition: border-color .2s ease, background-color .2s ease, color .2s ease;
}

.page-home .btn--pulse {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink);
  font-weight: 700;
}

.page-home .btn--pulse:hover,
.page-home .btn--pulse:focus-visible {
  background: var(--coral);
  border-color: var(--coral);
  color: var(--ink);
}

.page-home .btn--ghost {
  color: var(--paper);
  background: transparent;
}

.page-home .btn--ghost:hover,
.page-home .btn--ghost:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
}

/* ---------- hero ---------- */
.page-home .hero {
  position: relative;
  padding-block: clamp(2.2rem, 6vw, 4.5rem) clamp(2.4rem, 7vw, 5rem);
  overflow: hidden;
}

.page-home .hero__shard {
  position: absolute;
  inset: -10% -6% 0 -6%;
  background: linear-gradient(116deg,
    transparent 44%,
    rgba(52, 225, 214, .09) 44.2%,
    rgba(52, 225, 214, .09) 60%,
    transparent 60.2%),
    linear-gradient(116deg,
      transparent 66%,
      rgba(255, 111, 94, .07) 66.2%,
      rgba(255, 111, 94, .07) 74%,
      transparent 74.2%);
  pointer-events: none;
}

.page-home .hero__grid {
  position: relative;
  display: grid;
  gap: clamp(2rem, 5vw, 3.4rem);
}

.page-home .hero h1 {
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(2rem, 7.4vw, 4.3rem);
  line-height: 1.12;
  letter-spacing: .02em;
  margin: 0 0 1.25rem;
  max-width: 15ch;
}

.page-home .hero__lede {
  margin: 0;
  max-width: 34ch;
  font-size: clamp(1rem, 2.4vw, 1.12rem);
  color: rgba(242, 239, 230, .8);
}

.page-home .hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
  margin-top: 1.9rem;
}

.page-home .hero__preview {
  display: grid;
  gap: 1.6rem;
}

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

.page-home .hero-index__item {
  border-bottom: 1px solid var(--line);
}

.page-home .hero-index__link {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  grid-template-rows: auto auto;
  align-items: baseline;
  column-gap: .9rem;
  padding: .95rem .3rem;
  color: var(--paper);
  text-decoration: none;
  transition: background-color .2s ease, padding-left .2s ease;
}

.page-home .hero-index__num {
  grid-column: 1;
  grid-row: 1 / span 2;
  font-size: 1.02rem;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-home .hero-index__name {
  grid-column: 2;
  grid-row: 1;
  font-weight: 700;
  font-size: 1.06rem;
  letter-spacing: .03em;
}

.page-home .hero-index__hint {
  grid-column: 2;
  grid-row: 2;
  font-size: .84rem;
  line-height: 1.6;
  color: var(--mist);
}

.page-home .hero-index__link:hover,
.page-home .hero-index__link:focus-visible {
  background: rgba(52, 225, 214, .08);
  padding-left: .7rem;
}

.page-home .hero-index__link:hover .hero-index__name,
.page-home .hero-index__link:focus-visible .hero-index__name {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-home .image-frame {
  margin: 0;
}

.page-home .image-frame img {
  display: block;
  width: 100%;
  object-fit: cover;
  border: 1px solid var(--line);
  background: var(--rock);
}

.page-home .hero__figure img {
  aspect-ratio: 8 / 5;
}

.page-home .image-frame__caption {
  display: block;
  margin-top: .7rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--mist);
}

.page-home .band--paper .image-frame__caption {
  color: rgba(10, 15, 22, .55);
}

/* ---------- beat divider ---------- */
.page-home .beat-divider {
  height: 44px;
  margin-block: clamp(.5rem, 2vw, 1.5rem);
}

.page-home .beat-divider svg {
  display: block;
  width: 100%;
  height: 100%;
}

.page-home .beat-divider path {
  fill: none;
  stroke: var(--cyan);
  stroke-width: 1;
  opacity: .45;
}

/* ---------- path section ---------- */
.page-home .path-section {
  position: relative;
  padding-block: var(--home-block);
  overflow: hidden;
}

.page-home .path-section__bg {
  position: absolute;
  inset: auto 0 4% 0;
  opacity: .14;
  pointer-events: none;
}

.page-home .path-section__bg img {
  display: block;
  width: 100%;
  height: auto;
}

.page-home .path-section .section-head,
.page-home .step-cards {
  position: relative;
  z-index: 1;
}

.page-home .step-cards {
  display: grid;
  gap: 1.1rem;
}

.page-home .step-card {
  border: 1px solid var(--line);
  background: rgba(11, 26, 46, .68);
  padding: clamp(1.2rem, 3vw, 1.9rem);
  transition: border-color .2s ease, box-shadow .2s ease;
}

.page-home .step-card:hover {
  border-color: var(--cyan);
  box-shadow: 0 14px 32px rgba(0, 0, 0, .3);
}

.page-home .step-card__summary {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  cursor: pointer;
  list-style: none;
}

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

.page-home .step-card__summary::after {
  content: "展开";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--mist);
}

.page-home .step-card[open] .step-card__summary::after {
  content: "收起";
  color: var(--coral);
}

.page-home .step-card__number {
  font-size: clamp(2rem, 7vw, 3.1rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.page-home .step-card__title {
  font-size: 1.12rem;
  font-weight: 800;
  letter-spacing: .03em;
}

.page-home .step-card__body {
  margin-top: 1.1rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line);
}

.page-home .step-card__body p {
  margin: 0 0 .85rem;
  font-size: .96rem;
  color: rgba(242, 239, 230, .8);
}

.page-home .step-card__body p:last-child {
  margin-bottom: 0;
}

/* ---------- lines ---------- */
.page-home .lines {
  padding-block: var(--home-block);
}

.page-home .lines__grid {
  display: grid;
  gap: 1px;
  background: rgba(10, 15, 22, .16);
  border: 1px solid rgba(10, 15, 22, .16);
}

.page-home .line-card {
  display: flex;
  flex-direction: column;
  gap: .7rem;
  background: var(--paper);
  padding: clamp(1.3rem, 3.4vw, 2rem);
}

.page-home .line-card__num {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .18em;
  color: var(--moss);
}

.page-home .line-card__title {
  margin: 0;
  font-size: 1.22rem;
  font-weight: 800;
  letter-spacing: .03em;
}

.page-home .line-card__text {
  margin: 0;
  font-size: .98rem;
  color: rgba(10, 15, 22, .78);
}

.page-home .line-card__for {
  display: flex;
  align-items: flex-start;
  gap: .5rem;
  margin: auto 0 0;
  padding-top: .6rem;
  font-size: .85rem;
  line-height: 1.7;
  color: rgba(10, 15, 22, .6);
}

.page-home .tag {
  flex: none;
  display: inline-block;
  padding: .16rem .55rem;
  border-radius: 2px;
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--paper);
}

.page-home .tag--moss { background: var(--moss); }
.page-home .tag--cyan { background: #1f9c95; }
.page-home .tag--coral { background: #d9533f; }
.page-home .tag--gold { background: #b8862f; }

.page-home .line-card__link {
  align-self: flex-start;
  margin-top: .95rem;
  font-size: .9rem;
  letter-spacing: .04em;
  color: var(--black);
  text-decoration: none;
  border-bottom: 1px solid var(--coral);
  padding-bottom: 3px;
  transition: color .2s ease, border-color .2s ease;
}

.page-home .line-card__link:hover,
.page-home .line-card__link:focus-visible {
  color: #c24633;
  border-color: var(--black);
}

.page-home .further {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem 1.6rem;
  margin-top: clamp(1.6rem, 4vw, 2.4rem);
}

.page-home .further__link {
  font-size: .9rem;
  color: rgba(10, 15, 22, .82);
  text-decoration: none;
  border-bottom: 1px solid rgba(10, 15, 22, .4);
  padding-bottom: 3px;
  transition: color .2s ease, border-color .2s ease;
}

.page-home .further__link:hover,
.page-home .further__link:focus-visible {
  color: var(--moss);
  border-color: var(--moss);
}

/* ---------- device ---------- */
.page-home .device {
  padding-block: var(--home-block);
}

.page-home .device__grid {
  display: grid;
  gap: clamp(1.8rem, 5vw, 3rem);
}

.page-home .device__text p {
  margin: 0 0 1rem;
  font-size: 1rem;
  color: rgba(242, 239, 230, .82);
  max-width: 36ch;
}

.page-home .device__text .section-title {
  margin-bottom: 1.1rem;
  max-width: 20ch;
}

.page-home .image-frame--portrait img {
  aspect-ratio: 3 / 2;
}

.page-home .aside-note {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  column-gap: .9rem;
  margin-top: 1.5rem;
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--line);
  border-left: 2px solid var(--gold);
  background: rgba(19, 41, 74, .55);
}

.page-home .aside-note__label {
  grid-column: 1 / span 2;
  font-size: .7rem;
  letter-spacing: .18em;
  color: var(--gold);
  margin-bottom: .4rem;
}

.page-home .aside-note__value {
  font-family: var(--font-mono);
  font-size: clamp(1.9rem, 6vw, 2.7rem);
  font-weight: 800;
  line-height: 1;
  color: var(--gold);
}

.page-home .aside-note__desc {
  margin: 0;
  font-size: .9rem;
  color: rgba(242, 239, 230, .78);
}

/* ---------- zones ---------- */
.page-home .zones {
  padding-block: var(--home-block);
}

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

.page-home .zone-dim {
  border: 1px solid rgba(10, 15, 22, .18);
  padding: clamp(1.1rem, 3vw, 1.5rem);
  transition: border-color .2s ease, background-color .2s ease;
}

.page-home .zone-dim:hover {
  border-color: var(--moss);
}

.page-home .zone-dim[open] {
  border-color: var(--coral);
  background: rgba(255, 111, 94, .06);
}

.page-home .zone-dim summary {
  display: flex;
  flex-direction: column;
  gap: .45rem;
  cursor: pointer;
  list-style: none;
}

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

.page-home .zone-dim__label {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .18em;
  color: var(--moss);
}

.page-home .zone-dim__name {
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: .03em;
}

.page-home .zone-dim p {
  margin: .95rem 0 0;
  padding-top: .95rem;
  border-top: 1px solid rgba(10, 15, 22, .14);
  font-size: .94rem;
}

.page-home .zones__cta {
  margin-top: clamp(1.6rem, 4vw, 2.4rem);
}

.page-home .zones__btn {
  color: var(--black);
  border-color: rgba(10, 15, 22, .35);
}

.page-home .zones__btn:hover,
.page-home .zones__btn:focus-visible {
  border-color: var(--coral);
  color: #c24633;
}

/* ---------- support ---------- */
.page-home .support {
  padding-block: var(--home-block);
}

.page-home .image-frame--wide img {
  aspect-ratio: 2 / 1;
}

.page-home .support__figure {
  margin-bottom: clamp(1.8rem, 5vw, 3rem);
}

.page-home .support__grid {
  display: grid;
  gap: 1.6rem;
}

.page-home .support__text .section-title {
  margin-bottom: 1rem;
  max-width: 22ch;
}

.page-home .support__text p {
  margin: 0;
  max-width: 38ch;
  font-size: 1rem;
  color: rgba(242, 239, 230, .82);
}

.page-home .support__action {
  display: flex;
  align-items: flex-start;
}

/* ---------- responsive ---------- */
@media (min-width: 760px) {
  .page-home .lines__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-home .zones__dims {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-home {
    --home-pad-left: calc(var(--rail-w) + 2.5rem);
    --home-pad-right: clamp(1.5rem, 4vw, 3.5rem);
  }

  .page-home .hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
    gap: clamp(2.5rem, 4vw, 4rem);
  }

  .page-home .hero__preview {
    padding-top: 2.2rem;
  }

  .page-home .hero__figure {
    margin-left: -2rem;
    margin-top: 1.8rem;
  }

  .page-home .hero__figure img {
    box-shadow: 0 24px 48px rgba(0, 0, 0, .42);
  }

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

  .page-home .device__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: center;
    gap: clamp(2.5rem, 5vw, 4rem);
  }

  .page-home .support__grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    align-items: end;
  }

  .page-home .support__action {
    justify-content: flex-end;
  }
}

@media (min-width: 1180px) {
  .page-home {
    --home-block: 7rem;
  }

  .page-home .hero__preview {
    padding-top: 3.2rem;
  }

  .page-home .hero__figure {
    margin-left: -3.2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home * {
    transition-duration: .01ms !important;
  }
}