.page-home {
  position: relative;
  overflow-x: clip;
}

/* ============ 首屏拼贴 ============ */
.page-home .hero-board {
  padding-top: clamp(24px, 4.6vw, 60px);
  padding-bottom: clamp(26px, 4.6vw, 56px);
}

.page-home .hero-crumbs {
  margin-bottom: clamp(18px, 3vw, 34px);
}

.page-home .hero-collage {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}

.page-home .hero-cell {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  isolation: isolate;
}

.page-home .hero-cell--lead {
  border-radius: 0;
  border-color: var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 40px), calc(100% - 52px) 100%, 0 100%);
  min-height: clamp(360px, 72vw, 520px);
  display: flex;
  align-items: flex-end;
}

.page-home .hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-home .hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.34;
  filter: saturate(0.8) contrast(1.06);
}

.page-home .hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(0deg, rgba(55, 226, 213, 0.07) 0 1px, transparent 1px 58px),
    repeating-linear-gradient(90deg, rgba(55, 226, 213, 0.07) 0 1px, transparent 1px 58px),
    linear-gradient(180deg, rgba(14, 17, 22, 0.18) 0%, rgba(14, 17, 22, 0.78) 58%, rgba(14, 17, 22, 0.96) 100%);
}

.page-home .hero-lead-body {
  position: relative;
  z-index: 1;
  padding: clamp(22px, 4vw, 52px);
  max-width: min(680px, 100%);
}

.page-home .hero-lead-body h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(32px, 6.4vw, 66px);
  line-height: 1.06;
  letter-spacing: -0.035em;
  color: var(--paper);
  margin: 12px 0 18px;
}

.page-home .hero-lead-body .lede {
  color: var(--mist);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.78;
  max-width: 40ch;
  margin: 0;
}

.page-home .hero-stamp {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 22px 0 0;
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--mist);
  text-transform: uppercase;
}

.page-home .hero-stamp__key {
  color: var(--lava);
  font-weight: 700;
}

.page-home .hero-stamp__sep {
  color: var(--line);
}

.page-home .hero-cell--meter,
.page-home .hero-cell--search {
  padding: clamp(20px, 2.6vw, 30px);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-home .hero-cell--meter {
  background: linear-gradient(160deg, var(--panel-2) 0%, var(--panel) 70%);
}

.page-home .hero-cell--search {
  background: linear-gradient(140deg, rgba(255, 90, 33, 0.12) 0%, var(--panel) 60%);
  border-color: rgba(255, 90, 33, 0.28);
}

.page-home .hero-cell--meter .h3,
.page-home .hero-cell--search .h3 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-home .hero-search__note {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--mist);
}

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

.page-home .meter-list {
  display: grid;
  gap: 10px;
  margin: 0;
}

.page-home .meter-list > div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--line);
}

.page-home .meter-list dt {
  font-size: var(--fs-14);
  color: var(--mist);
}

.page-home .meter-list dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}

@media (min-width: 900px) {
  .page-home .hero-collage {
    grid-template-columns: repeat(12, 1fr);
    grid-auto-rows: minmax(0, auto);
  }

  .page-home .hero-cell--lead {
    grid-column: 1 / 9;
    grid-row: 1 / 5;
  }

  .page-home .hero-cell--meter {
    grid-column: 9 / 13;
    grid-row: 1 / 3;
  }

  .page-home .hero-cell--search {
    grid-column: 9 / 13;
    grid-row: 3 / 5;
  }
}

/* ============ 粘性章节索引 ============ */
.page-home .home-toc {
  position: sticky;
  top: var(--header-h);
  z-index: 6;
  display: flex;
  align-items: center;
  gap: clamp(10px, 2vw, 26px);
  margin: 0 auto;
  padding: 12px 0;
  background: rgba(14, 17, 22, 0.94);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
  overflow-x: auto;
  scrollbar-width: none;
}

.page-home .home-toc::-webkit-scrollbar {
  display: none;
}

.page-home .home-toc .toc__title {
  flex: none;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-home .home-toc .toc__link {
  flex: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-14);
  color: var(--mist);
  text-decoration: none;
  padding: 4px 2px;
  transition: color 0.2s var(--ease);
}

.page-home .home-toc .toc__link:hover {
  color: var(--cyan);
}

.page-home .home-toc .toc__num {
  font-size: var(--fs-12);
  color: var(--lava);
  letter-spacing: 0.08em;
}

/* ============ 纵向时间轴 ============ */
.page-home .timeline-block {
  position: relative;
  margin-top: clamp(40px, 6vw, 84px);
  padding-bottom: clamp(40px, 6vw, 76px);
}

.page-home .timeline-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.page-home .timeline-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.14;
}

.page-home .timeline-inner {
  position: relative;
  z-index: 1;
}

.page-home .timeline-list {
  margin-top: clamp(20px, 3vw, 36px);
  border-bottom: 1px dashed var(--line);
}

.page-home .tl-node {
  border-top: 1px dashed var(--line);
  background: rgba(23, 28, 34, 0.72);
}

.page-home .tl-node > summary {
  display: grid;
  grid-template-columns: 66px minmax(0, 1fr) 20px;
  align-items: center;
  gap: 14px;
  padding: 18px 16px;
  cursor: pointer;
  list-style: none;
  transition: background 0.2s var(--ease);
}

.page-home .tl-node > summary::-webkit-details-marker {
  display: none;
}

.page-home .tl-node > summary:hover {
  background: rgba(55, 226, 213, 0.06);
}

.page-home .tl-node > summary::after {
  content: "+";
  grid-column: 3;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--mist);
  text-align: right;
}

.page-home .tl-node[open] > summary::after {
  content: "–";
  color: var(--cyan);
}

.page-home .tl-key {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: var(--fs-14);
  letter-spacing: 0.1em;
  color: var(--lava);
}

.page-home .tl-key::before {
  content: "";
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--lava);
  box-shadow: 0 0 0 4px rgba(255, 90, 33, 0.16);
}

.page-home .tl-title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(16px, 1.9vw, 21px);
  line-height: 1.35;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-home .tl-body {
  display: grid;
  gap: 10px;
  max-width: 66ch;
  padding: 0 16px 24px 96px;
}

.page-home .tl-body p {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.78;
  color: var(--mist);
}

.page-home .tl-body strong {
  color: var(--paper);
  font-weight: 700;
}

.page-home .tl-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.page-home .tl-link {
  font-size: var(--fs-14);
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px dashed rgba(55, 226, 213, 0.45);
  padding-bottom: 2px;
}

.page-home .tl-link:hover {
  color: var(--paper);
}

/* ============ 横向索引带 ============ */
.page-home .index-band {
  margin-block: clamp(44px, 6vw, 90px);
  padding-block: clamp(30px, 5vw, 58px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background:
    repeating-linear-gradient(90deg, rgba(51, 60, 70, 0.55) 0 1px, transparent 1px 104px),
    linear-gradient(100deg, rgba(255, 90, 33, 0.08) 0%, rgba(14, 17, 22, 0) 58%);
}

.page-home .index-band__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 44px);
}

.page-home .index-band__main .lede {
  margin: 14px 0 0;
  max-width: 46ch;
  color: var(--mist);
  font-size: var(--fs-16);
  line-height: 1.78;
}

.page-home .level-head {
  margin: clamp(22px, 3vw, 30px) 0 0;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-home .level-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.page-home .level-chip {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--panel);
  color: var(--steel);
  font-variant-numeric: tabular-nums;
}

.page-home .level-chip--cup {
  color: var(--signal);
  border-color: rgba(255, 197, 61, 0.36);
  background: rgba(255, 197, 61, 0.06);
}

.page-home .index-band__note {
  margin: 22px 0 18px;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--mist);
  max-width: 46ch;
}

.page-home .index-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel);
  overflow: hidden;
  position: relative;
}

.page-home .index-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1000 / 620;
  object-fit: cover;
  opacity: 0.86;
}

.page-home .index-figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  font-size: var(--fs-12);
  line-height: 1.7;
  color: var(--mist);
}

@media (min-width: 900px) {
  .page-home .index-band__grid {
    grid-template-columns: 1.35fr 1fr;
    align-items: center;
  }
}

/* ============ 检索演示 ============ */
.page-home .hit-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-home .hit-row {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "key count"
    "range status";
  gap: 6px 14px;
  align-items: center;
  padding: 13px 16px;
  background: var(--panel);
  transition: background 0.18s var(--ease);
}

.page-home .hit-row:hover {
  background: var(--panel-2);
}

.page-home .hit-row__key {
  grid-area: key;
  font-size: var(--fs-14);
  letter-spacing: 0.12em;
  color: var(--lava);
}

.page-home .hit-row__range {
  grid-area: range;
  font-size: var(--fs-14);
  color: var(--mist);
}

.page-home .hit-row__count {
  grid-area: count;
  font-size: var(--fs-14);
  color: var(--paper);
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.page-home .hit-row .tag {
  grid-area: status;
  justify-self: start;
}

.page-home .hit-list-foot {
  margin: 16px 0 0;
  max-width: 58ch;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--mist);
}

@media (min-width: 700px) {
  .page-home .hit-row {
    grid-template-columns: 72px minmax(0, 1fr) 96px 104px;
    grid-template-areas: "key range count status";
    align-items: center;
  }

  .page-home .hit-row__count {
    text-align: right;
  }

  .page-home .hit-row .tag {
    justify-self: end;
  }
}

/* ============ 排障三步 ============ */
.page-home .trouble-main .section-head {
  margin-bottom: clamp(18px, 2.6vw, 28px);
}

.page-home .flow-step {
  border: 1px solid var(--line);
  border-left: 3px solid var(--line);
  background: var(--panel);
  margin-bottom: 10px;
  transition: border-color 0.2s var(--ease);
}

.page-home .flow-step[open] {
  border-left-color: var(--lava);
}

.page-home .flow-step > summary {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  padding: 16px;
  cursor: pointer;
  list-style: none;
}

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

.page-home .flow-num {
  font-size: var(--fs-14);
  letter-spacing: 0.1em;
  color: var(--lava);
}

.page-home .flow-title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: var(--fs-16);
  letter-spacing: -0.01em;
  color: var(--paper);
  line-height: 1.4;
}

.page-home .flow-body {
  display: grid;
  gap: 10px;
  padding: 0 16px 18px 72px;
}

.page-home .flow-body p {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.78;
  color: var(--mist);
  max-width: 52ch;
}

.page-home .flow-body p:last-child {
  margin-top: 2px;
}

.page-home .trouble-foot {
  margin: 18px 0 16px;
  max-width: 54ch;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--mist);
}

.page-home .trouble-figure {
  margin: 0;
  align-self: start;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--panel);
}

.page-home .trouble-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 720 / 1080;
  object-fit: cover;
}

.page-home .trouble-figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  font-size: var(--fs-12);
  line-height: 1.7;
  color: var(--mist);
}

@media (min-width: 900px) {
  .page-home .trouble-figure {
    position: sticky;
    top: calc(var(--header-h) + 64px);
  }
}

/* ============ 收束 ============ */
.page-home .home-close {
  max-width: 64ch;
  margin-inline: auto;
  padding-top: clamp(26px, 4vw, 44px);
  border-top: 1px solid var(--line);
}

.page-home .home-close .prose {
  margin: 14px 0 22px;
  color: var(--mist);
}

.page-home .home-close .contact-grid {
  margin-bottom: 20px;
}

.page-home .home-close__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 20px;
  font-size: var(--fs-14);
}

.page-home .home-close__links a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px dashed rgba(55, 226, 213, 0.4);
  padding-bottom: 2px;
}

.page-home .home-close__links a:hover {
  color: var(--paper);
}

.page-home .home-close__sep {
  color: var(--line);
}

.page-home .home-close__legal {
  margin: 0;
  font-size: var(--fs-12);
  line-height: 1.8;
  letter-spacing: 0.04em;
  color: var(--mist);
  opacity: 0.8;
}

/* ============ 窄屏收口 ============ */
@media (max-width: 720px) {
  .page-home .tl-node > summary {
    grid-template-columns: 54px minmax(0, 1fr) 18px;
    gap: 10px;
    padding: 16px 12px;
  }

  .page-home .tl-body {
    padding: 0 12px 20px 12px;
  }

  .page-home .flow-body {
    padding: 0 14px 16px 14px;
  }

  .page-home .hero-cell--lead {
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 34px) 100%, 0 100%);
  }
}
<<<PAGE_CSS_END>>>