.page-home {
  --home-tick: rgba(251, 248, 242, 0.28);
  --home-tick-soft: rgba(251, 248, 242, 0.14);
  --home-line: rgba(20, 52, 43, 0.16);
  display: block;
  background: var(--paper);
  color: var(--black);
  overflow-x: clip;
}

.page-home .prose {
  color: var(--slate);
  line-height: 1.75;
}

.page-home h2.section-title {
  color: var(--ink);
  margin-top: 0.5rem;
}

/* ---------- 首屏框景 ---------- */

.page-home .home-hero {
  background: var(--ink);
  color: var(--paper);
  padding-block: 1.25rem clamp(2.5rem, 6vw, 4.5rem);
}

.page-home .home-crumb ol {
  color: rgba(251, 248, 242, 0.6);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
}

.page-home .home-crumb ol a {
  color: rgba(251, 248, 242, 0.85);
  text-decoration: none;
}

.page-home .home-crumb ol a:hover {
  color: var(--paper);
  border-bottom: 1px solid var(--amber);
}

.page-home .hero-frame {
  position: relative;
  margin-top: 1.25rem;
  padding: clamp(1.25rem, 4vw, 2.75rem);
  border: 1px solid var(--home-tick);
  border-radius: var(--radius);
}

.page-home .hero-frame::before {
  content: "";
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: 3px;
  width: 8px;
  background-image: repeating-linear-gradient(
    to bottom,
    var(--home-tick-soft) 0 1px,
    transparent 1px 16px
  );
  pointer-events: none;
}

.page-home .hero-frame__corner {
  position: absolute;
  width: 16px;
  height: 16px;
  background: var(--ink);
  border: 1px solid var(--home-tick);
  pointer-events: none;
}

.page-home .hero-frame__corner--tl { top: -8px; left: -8px; }
.page-home .hero-frame__corner--tr { top: -8px; right: -8px; }
.page-home .hero-frame__corner--bl { bottom: -8px; left: -8px; }
.page-home .hero-frame__corner--br { bottom: -8px; right: -8px; }

.page-home .hero-grid {
  display: grid;
  gap: 2rem;
}

.page-home .hero-copy .eyebrow {
  color: rgba(251, 248, 242, 0.68);
}

.page-home .hero-copy .display-1 {
  color: var(--paper);
  margin: 0.75rem 0 0;
  font-size: clamp(1.9rem, 5.2vw, 3.4rem);
  line-height: 1.16;
  max-width: 16ch;
}

.page-home .hero-copy .lede {
  margin: 1.25rem 0 0;
  max-width: 34rem;
  color: rgba(251, 248, 242, 0.82);
  font-size: 1rem;
  line-height: 1.8;
}

.page-home .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.75rem;
}

.page-home .hero-issue {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1.75rem;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--home-tick);
  border-radius: var(--radius);
  color: var(--paper);
  text-decoration: none;
  font-size: 0.82rem;
  transition: border-color 140ms var(--ease), transform 140ms var(--ease);
}

.page-home .hero-issue:hover,
.page-home .hero-issue:focus-visible {
  border-color: var(--amber);
  transform: translateY(-2px);
}

.page-home .hero-issue__no {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-home .hero-issue__text {
  flex: 1 1 auto;
  color: rgba(251, 248, 242, 0.8);
}

.page-home .hero-issue__arrow {
  color: var(--amber);
}

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

.page-home .hero-figure__frame {
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

.page-home .hero-figure__frame img,
.page-home .cat-figure .img-frame img,
.page-home .steps-figure .img-frame img,
.page-home .scale-figure .img-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-home .img-caption {
  margin-top: 0.6rem;
  font-size: 0.72rem;
  color: rgba(251, 248, 242, 0.55);
  letter-spacing: 0.03em;
}

.page-home .cat-figure .img-caption,
.page-home .steps-figure .img-caption,
.page-home .scale-figure .img-caption {
  color: var(--slate);
}

/* ---------- 通用区块头 ---------- */

.page-home .block-head {
  max-width: 44rem;
  margin-bottom: clamp(1.5rem, 4vw, 2.25rem);
}

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

.page-home .block-head .prose {
  margin: 0.9rem 0 0;
}

.page-home .block-head--split {
  max-width: none;
}

.page-home .block-head__aside {
  margin-top: 1rem;
}

/* ---------- 品类矩阵 ---------- */

.page-home .home-cats {
  background: var(--sand);
}

.page-home .cat-filter__bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
}

.page-home .cat-filter__btn {
  appearance: none;
  border: 1px solid rgba(20, 52, 43, 0.22);
  background: transparent;
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  padding: 0.42rem 0.85rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 140ms var(--ease), color 140ms var(--ease), background-color 140ms var(--ease);
}

.page-home .cat-filter__btn:hover {
  border-color: var(--amber);
  color: var(--amber-deep);
}

.page-home .cat-filter__btn.is-active,
.page-home .cat-filter__btn[aria-pressed="true"] {
  border-color: var(--amber);
  color: var(--amber-deep);
  background: rgba(194, 101, 24, 0.08);
}

.page-home .cat-layout {
  display: grid;
  gap: 1.5rem;
}

.page-home .cat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.page-home .cat-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1rem 0.95rem 1.1rem;
  background: var(--sand-l);
  border: 1px solid var(--home-line);
  border-radius: var(--radius);
  text-decoration: none;
  color: inherit;
  transition: transform 140ms var(--ease), border-color 140ms var(--ease);
}

.page-home .cat-card:hover,
.page-home .cat-card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--amber);
}

.page-home .cat-card .num-mark {
  align-self: flex-start;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
}

.page-home .cat-card h3 {
  margin: 0.35rem 0 0;
  font-family: var(--font-sans);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-home .cat-card p {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.62;
  color: var(--slate);
}

.page-home .cat-card__note {
  margin-top: auto;
  padding-top: 0.6rem;
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--slate);
  opacity: 0.85;
}

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

.page-home .cat-figure .img-frame {
  aspect-ratio: 1 / 1;
  overflow: hidden;
}

/* ---------- 期号时间轴 ---------- */

.page-home .home-timeline {
  background: var(--paper);
  padding-bottom: clamp(2rem, 5vw, 3.5rem);
}

.page-home .timeline {
  list-style: none;
  margin: 0;
  padding: 0 var(--gutter) 1.25rem;
  display: flex;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-home .timeline__item {
  position: relative;
  flex: 0 0 clamp(8.5rem, 22vw, 10.5rem);
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 0.25rem 1rem 0.5rem;
  border-left: 1px solid var(--home-line);
}

.page-home .timeline__item::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 0;
  width: 1px;
  height: 14px;
  background: var(--ink);
}

.page-home .timeline__item--now {
  border-left-color: var(--amber);
  background: linear-gradient(180deg, rgba(194, 101, 24, 0.09), transparent 72%);
}

.page-home .timeline__item--now::before {
  background: var(--amber);
  height: 22px;
}

.page-home .timeline__no {
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
  letter-spacing: 0.02em;
}

.page-home .timeline__item--now .timeline__no {
  color: var(--amber-deep);
}

.page-home .timeline__label {
  margin: 0.4rem 0 0;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--ink);
}

.page-home .timeline__meta {
  margin: 0;
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  color: var(--slate);
}

.page-home .timeline__hint {
  margin: 0.5rem 0 0;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--slate);
}

/* ---------- 手机端三步 ---------- */

.page-home .home-steps {
  background: var(--sand-l);
}

.page-home .steps-layout {
  display: grid;
  gap: 2rem;
}

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

.page-home .steps-figure .img-frame {
  aspect-ratio: 9 / 16;
  overflow: hidden;
  max-width: 22rem;
}

.page-home .steps-list {
  display: grid;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.page-home .step {
  background: var(--paper);
  border: 1px solid var(--home-line);
  border-radius: var(--radius);
  padding: 0.85rem 1rem 0.95rem;
  transition: border-color 140ms var(--ease);
}

.page-home .step:hover {
  border-color: var(--amber);
}

.page-home .step summary {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-sans);
  font-weight: 600;
  color: var(--ink);
}

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

.page-home .step summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--slate);
}

.page-home .step[open] summary::after {
  content: "−";
  color: var(--amber);
}

.page-home .step__no {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.page-home .step[open] .step__no {
  color: var(--amber);
}

.page-home .step p {
  margin: 0.7rem 0 0;
  font-size: 0.88rem;
  line-height: 1.72;
  color: var(--slate);
}

/* ---------- 工具清单 ---------- */

.page-home .home-tools {
  background: var(--ink);
  color: var(--paper);
}

.page-home .home-tools .eyebrow {
  color: rgba(251, 248, 242, 0.66);
}

.page-home .home-tools h2.section-title {
  color: var(--paper);
}

.page-home .home-tools .prose {
  color: rgba(251, 248, 242, 0.78);
}

.page-home .tool-grid {
  list-style: none;
  margin: 0 0 2rem;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: 1px solid rgba(251, 248, 242, 0.18);
}

.page-home .tool {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 1.05rem 1rem 1.15rem 0;
  border-bottom: 1px solid rgba(251, 248, 242, 0.18);
}

.page-home .tool__no {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-home .tool h3 {
  margin: 0.1rem 0 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 700;
  color: var(--paper);
}

.page-home .tool p {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.66;
  color: rgba(251, 248, 242, 0.68);
}

.page-home .home-tools .btn-accent {
  align-self: flex-start;
}

/* ---------- 规模刻度 ---------- */

.page-home .home-scale {
  background: var(--paper);
}

.page-home .scale-layout {
  display: grid;
  gap: 2rem;
}

.page-home .scale-body .prose {
  margin-top: 0.9rem;
}

.page-home .gauges {
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 0;
  display: grid;
  gap: 1.15rem;
}

.page-home .gauge__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 0.4rem;
}

.page-home .gauge__label {
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  color: var(--slate);
}

.page-home .gauge__value {
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
}

.page-home .gauge__track {
  position: relative;
  height: 12px;
  border: 1px solid var(--home-line);
  background: var(--sand-l);
  overflow: hidden;
}

.page-home .gauge__fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--ink-2), var(--ink));
}

.page-home .gauge__fill--a { width: 62%; }
.page-home .gauge__fill--b { width: 78%; }
.page-home .gauge__fill--c { width: 88%; }
.page-home .gauge__fill--d { width: 70%; }

.page-home .gauge__track::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    to right,
    rgba(251, 248, 242, 0.42) 0 1px,
    transparent 1px 8px
  );
  pointer-events: none;
}

.page-home .scale-note {
  margin: 1.5rem 0 0;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--slate);
}

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

.page-home .scale-figure .img-frame {
  aspect-ratio: 9 / 7;
  overflow: hidden;
}

/* ---------- 对接 ---------- */

.page-home .home-contact {
  background: var(--paper);
  padding-block: clamp(3rem, 8vw, 6rem);
}

.page-home .contact-band {
  max-width: 42rem;
  border-top: 1px solid var(--home-line);
  padding-top: clamp(1.5rem, 4vw, 2.5rem);
}

.page-home .contact-band .prose {
  margin-top: 0.9rem;
}

.page-home .contact-list {
  list-style: none;
  margin: 1.75rem 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.page-home .contact-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.85rem;
}

.page-home .contact-list .mono {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--slate);
  min-width: 4.25rem;
}

.page-home .contact-list a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  word-break: break-all;
}

.page-home .contact-list a:hover,
.page-home .contact-list a:focus-visible {
  color: var(--amber-deep);
  border-bottom-color: var(--amber);
}

/* ---------- 断点 ---------- */

@media (min-width: 720px) {
  .page-home .cat-grid {
    grid-template-columns: 1.2fr 1fr 1fr;
    gap: 1rem;
  }

  .page-home .cat-card:nth-child(3n + 2) {
    margin-top: 1.5rem;
  }

  .page-home .cat-card:nth-child(3n + 3) {
    margin-top: 0.75rem;
  }

  .page-home .steps-list {
    gap: 1rem;
  }

  .page-home .step:nth-child(2) {
    margin-inline-start: 1.5rem;
  }

  .page-home .step:nth-child(3) {
    margin-inline-start: 3rem;
  }

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

  .page-home .tool {
    padding-right: 1.5rem;
  }
}

@media (min-width: 900px) {
  .page-home .hero-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: center;
    gap: 3rem;
  }

  .page-home .hero-figure {
    margin-block-start: 1.5rem;
  }

  .page-home .block-head--split {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
    gap: 3rem;
    align-items: end;
  }

  .page-home .block-head--split .block-head__aside {
    margin-top: 0;
  }

  .page-home .steps-layout {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
    gap: 3.5rem;
    align-items: start;
  }

  .page-home .scale-layout {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    gap: 3.5rem;
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .page-home .cat-layout {
    grid-template-columns: minmax(0, 2.15fr) minmax(0, 1fr);
    align-items: start;
    gap: 1.75rem;
  }
}

@media (min-width: 1080px) {
  .page-home .tool-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 84rem) {
  .page-home .timeline {
    padding-inline: calc((100% - var(--shell)) / 2);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .cat-card,
  .page-home .hero-issue,
  .page-home .cat-filter__btn,
  .page-home .step {
    transition: opacity 200ms var(--ease);
    transform: none;
  }

  .page-home .cat-card:hover,
  .page-home .hero-issue:hover {
    transform: none;
  }
}
<<<END>>>