.page-home {
  --pg-num: clamp(2.4rem, 7vw, 5rem);
  --pg-cut: 1.8rem;
  --pg-gridline: rgba(95, 200, 240, 0.075);
  position: relative;
  background: var(--ink);
  color: var(--silver);
  overflow-x: hidden;
}

.page-home::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    repeating-linear-gradient(0deg, var(--pg-gridline) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(90deg, var(--pg-gridline) 0 1px, transparent 1px 72px);
}

.page-home > * {
  position: relative;
  z-index: 1;
}

/* 通用段落与标题 */
.page-home .sec-title {
  font-family: var(--sans);
  font-weight: 800;
  font-size: clamp(1.6rem, 4.4vw, 2.6rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--frost);
  margin: 0.5rem 0 1rem;
}

.page-home .prose-p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--silver);
  max-width: var(--measure);
  margin: 0 0 1.5rem;
}

.page-home .eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ice);
}

/* 面包屑 */
.pg-crumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1.25rem 1.25rem 0;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--graphite);
}

.pg-crumb__dot {
  width: 7px;
  height: 7px;
  background: var(--gold);
  display: inline-block;
}

.pg-crumb__sep {
  color: var(--ice-deep);
}

.pg-crumb [aria-current="page"] {
  color: var(--ice);
}

/* 首屏 */
.hero {
  padding: 2rem 1.25rem 0;
}

.hero__grid {
  display: grid;
  gap: 2rem;
}

.hero__title {
  font-family: var(--sans);
  font-weight: 900;
  font-size: clamp(2.5rem, 11vw, 6.5rem);
  line-height: 0.98;
  letter-spacing: -0.03em;
  color: var(--frost);
  margin: 0.75rem 0 1.25rem;
}

.hero__accent {
  color: var(--gold);
}

.hero__sub {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--silver);
  max-width: 34em;
  margin: 0 0 1.75rem;
}

.hero__cta {
  display: inline-block;
}

.hero__panel {
  border: 1px solid var(--line);
  background: linear-gradient(160deg, var(--night) 0%, rgba(18, 32, 46, 0.4) 100%);
  padding: 1.5rem;
  display: grid;
  gap: 1.25rem;
}

.seal {
  width: 78px;
  height: 78px;
  color: var(--gold);
}

.hero__data {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem 1rem;
}

.datum {
  display: grid;
  gap: 0.35rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--line-strong);
}

.datum__num {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(1.5rem, 4.5vw, 2rem);
  color: var(--ice);
  line-height: 1;
}

.datum__label {
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--graphite);
}

.hero__note {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--graphite);
  margin: 0;
}

.hero__media {
  margin: 2.5rem 0 0;
  clip-path: polygon(0 0, 100% 2.5rem, 100% 100%, 0 100%);
}

.hero__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* 更新时间带 */
.update {
  margin-top: -1.5rem;
  padding: 3.5rem 1.25rem 3rem;
  background: var(--night);
  clip-path: polygon(0 0, 100% 1.8rem, 100% 100%, 0 calc(100% - 1.8rem));
}

.update__grid {
  display: grid;
  gap: 2rem;
}

.stampStat {
  display: grid;
  gap: 0.5rem;
  border-left: 3px solid var(--cinnabar);
  padding-left: 1rem;
}

.stampStat__num {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(1.9rem, 7vw, 3.2rem);
  line-height: 1;
  color: var(--frost);
  letter-spacing: -0.02em;
}

.stampStat__rule {
  display: block;
  height: 1px;
  background: var(--line-strong);
}

.stampStat__label {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--ice-deep);
}

.update__rows {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  align-content: start;
}

.urow {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 1rem;
  padding: 0.95rem 0;
  border-bottom: 1px solid var(--line);
}

.urow__k {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  color: var(--ice-deep);
}

.urow__v {
  font-size: 0.95rem;
  color: var(--frost);
}

/* 对照台 */
.compare {
  padding: 3.5rem 1.25rem;
}

.duo {
  display: grid;
  gap: 1rem;
  margin-top: 1rem;
}

.duo__col {
  border: 1px solid var(--line);
  background: rgba(18, 32, 46, 0.55);
  padding: 1rem 1rem 1.25rem;
}

.duo__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--line-strong);
}

.duo__tag {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--ice);
  letter-spacing: 0.04em;
}

.duo__id {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.8rem;
  color: var(--graphite);
}

.duo__list {
  margin: 0;
  padding: 0;
}

.duo__row {
  display: grid;
  gap: 0.25rem;
  padding: 0.75rem 0.6rem;
  border-bottom: 1px solid var(--line);
}

.duo__row:last-child {
  border-bottom: none;
}

.duo__row dt {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--ice-deep);
}

.duo__row dd {
  margin: 0;
  font-size: 0.92rem;
  color: var(--frost);
}

.duo__row.is-diff {
  background: var(--cinnabar);
  border-bottom-color: var(--cinnabar-deep);
  box-shadow: inset 0 0 0 1px var(--line-strong);
}

.duo__row.is-diff dt,
.duo__row.is-diff dd {
  color: #fff;
}

/* 折叠说明 */
.folds {
  margin-top: 1.5rem;
  border-left: 2px solid var(--gold);
  background: rgba(217, 164, 65, 0.06);
}

.folds__sum {
  cursor: pointer;
  padding: 0.9rem 1rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: var(--gold);
  list-style: none;
}

.folds__sum::-webkit-details-marker {
  display: none;
}

.folds__sum::after {
  content: "+";
  float: right;
  font-weight: 700;
}

.folds[open] .folds__sum::after {
  content: "–";
}

.folds__body {
  padding: 0 1rem 1rem;
}

.folds__list {
  margin: 0;
  padding-left: 1.1rem;
  display: grid;
  gap: 0.5rem;
}

.folds__list li {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--silver);
}

.compare__media {
  margin: 2rem 0 0;
  border: 1px solid var(--line);
}

.compare__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* 七大栏目主题带 */
.belt {
  position: relative;
  padding: 4.5rem 0 4.5rem;
  background: var(--ink);
  clip-path: polygon(0 2.2rem, 100% 0, 100% calc(100% - 2.2rem), 0 100%);
  overflow: hidden;
}

.belt__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.belt__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.28;
}

.belt__inner {
  position: relative;
  z-index: 1;
  padding: 0 1.25rem;
}

.belt__track {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0 1.25rem 1rem 0;
  display: flex;
  gap: 0.85rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.belt__item {
  flex: 0 0 78%;
  scroll-snap-align: start;
}

.belt__link {
  display: grid;
  gap: 0.5rem;
  height: 100%;
  padding: 1.25rem 1.1rem;
  text-decoration: none;
  border: 1px solid var(--line-strong);
  border-top: 3px solid var(--ice);
  background: rgba(11, 15, 20, 0.82);
  transition: background 180ms var(--ease), transform 180ms var(--ease);
}

.belt__link:hover,
.belt__link:focus-visible {
  background: rgba(18, 32, 46, 0.95);
  transform: translateY(-3px);
}

.belt__num {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.belt__name {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--frost);
}

.belt__desc {
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--silver);
}

/* 标签区 */
.tags {
  padding: 3.5rem 1.25rem;
  background: var(--frost);
  color: var(--ink);
}

.tags .sec-title {
  color: var(--ink);
}

.tags .prose-p {
  color: #35424f;
}

.tags__grid {
  display: grid;
  gap: 2rem;
}

.tags__panel {
  border: 1px solid rgba(30, 108, 140, 0.25);
  background: #fff;
  padding: 1.25rem;
}

.tags__caption {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--ice-deep);
  margin: 0 0 0.75rem;
}

.chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0 0 1.5rem;
  padding: 0;
}

.chips:last-child {
  margin-bottom: 0;
}

.chip {
  display: inline-block;
  padding: 0.4rem 0.8rem;
  font-size: 0.82rem;
  text-decoration: none;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--ice-deep);
  transition: background 180ms var(--ease), color 180ms var(--ease);
}

.chip:hover,
.chip:focus-visible {
  background: var(--ice);
  color: var(--ink);
  border-color: var(--ice);
}

.chip--t1 { border-color: var(--ice); }
.chip--t2 { border-color: var(--ice-deep); }
.chip--t3 { border-color: var(--cinnabar); }
.chip--t4 { border-color: var(--gold); }
.chip--t5 { border-color: var(--mint); }
.chip--t6 { border-color: var(--graphite); }
.chip--t7 { border-color: var(--night); }

.chips--l1 .chip {
  font-weight: 600;
  background: rgba(95, 200, 240, 0.08);
}

/* 联络通道 */
.reach {
  padding: 3.5rem 1.25rem 4rem;
  background: var(--ink);
}

.reach__grid {
  display: grid;
  gap: 2rem;
}

.reach__list {
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
  display: grid;
  gap: 0;
}

.reach__item {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 0.35rem 0.75rem;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--line);
}

.reach__k {
  grid-column: 1 / -1;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--ice-deep);
}

.reach__v {
  font-size: 0.95rem;
  color: var(--frost);
  word-break: break-all;
}

.reach__hint {
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--graphite);
  margin: 0 0 1.5rem;
}

.reach__fig {
  margin: 0;
  border: 1px solid var(--line-gold);
  padding: 1rem;
}

.reach__fig img {
  display: block;
  width: 100%;
  max-width: 320px;
  height: auto;
  object-fit: contain;
  margin: 0 auto;
}

/* 显现动效 */
.page-home [data-reveal] {
  opacity: 1;
}

.reveal-ready .page-home [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 420ms var(--ease), transform 420ms var(--ease);
}

.reveal-ready .page-home [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal-ready .page-home [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-home .belt__link,
  .page-home .chip {
    transition: none;
  }
}

@media (min-width: 760px) {
  .pg-crumb,
  .hero,
  .compare,
  .tags,
  .reach {
    padding-left: 2.25rem;
    padding-right: 2.25rem;
  }

  .update {
    padding-left: 2.25rem;
    padding-right: 2.25rem;
  }

  .belt__inner {
    padding: 0 2.25rem;
  }

  .belt__item {
    flex: 0 0 46%;
  }

  .hero__grid {
    grid-template-columns: 1.35fr 0.65fr;
    gap: 2.5rem;
    align-items: start;
  }

  .update__grid {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }

  .duo {
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
  }

  .tags__grid {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
  }

  .reach__grid {
    grid-template-columns: 1.5fr 0.5fr;
    gap: 3rem;
    align-items: start;
  }

  .reach__item {
    grid-template-columns: 7.5rem 1fr auto;
    align-items: center;
  }

  .reach__k {
    grid-column: auto;
  }
}

@media (min-width: 1080px) {
  .hero__title {
    font-size: clamp(3.5rem, 7.2vw, 7rem);
  }

  .belt__item {
    flex: 0 0 27%;
  }

  .belt__track {
    padding-right: 0;
  }

  .update {
    padding-top: 4.5rem;
    padding-bottom: 4rem;
  }

  .compare,
  .reach {
    padding-top: 5rem;
    padding-bottom: 5rem;
  }
}