.page-home {
  --home-pad: clamp(18px, 4vw, 44px);
  --home-gap: clamp(20px, 3vw, 34px);
}

/* ---------- 首屏封面 ---------- */
.page-home .home-cover {
  position: relative;
  overflow: hidden;
  background: var(--db-ink);
  color: var(--db-cream);
  padding: calc(var(--db-header-h) + 34px) 0 54px;
  border-bottom: 1px solid rgba(198, 189, 171, .2);
}

.page-home .home-cover__plate {
  position: absolute;
  inset: 0;
  margin: 0;
  z-index: 0;
  pointer-events: none;
}

.page-home .home-cover__plate img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .2;
  filter: grayscale(.42) sepia(.14);
}

.page-home .home-cover__plate::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(18, 16, 14, .58) 0%, rgba(18, 16, 14, .9) 78%),
    repeating-linear-gradient(0deg, rgba(198, 189, 171, .07) 0 1px, transparent 1px 42px),
    repeating-linear-gradient(90deg, rgba(198, 189, 171, .07) 0 1px, transparent 1px 42px);
}

.page-home .home-cover__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 30px;
  grid-template-columns: minmax(0, 1fr);
  grid-template-areas:
    "masthead"
    "headline"
    "index";
}

.page-home .home-cover__masthead {
  grid-area: masthead;
  display: flex;
  align-items: center;
  gap: 14px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(169, 118, 47, .45);
}

.page-home .home-cover__seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--db-copper);
  border-radius: var(--db-radius);
  color: var(--db-copper-bright);
  font-family: var(--db-serif);
  font-size: 18px;
  line-height: 1;
}

.page-home .home-cover__issue {
  font-family: var(--db-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--db-rock);
  text-transform: uppercase;
}

.page-home .home-cover__headline {
  grid-area: headline;
}

.page-home .home-cover__headline h1 {
  margin: 14px 0 0;
  font-family: var(--db-serif);
  font-weight: 600;
  font-size: clamp(28px, 6vw, 54px);
  line-height: 1.28;
  letter-spacing: .02em;
  color: var(--db-cream);
}

.page-home .home-cover__headline .db-lead {
  max-width: 62ch;
  margin-top: 18px;
  color: rgba(246, 242, 233, .78);
}

.page-home .home-cover__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-home .home-cover__cta .db-btn--ghost {
  border-color: rgba(217, 168, 94, .55);
  color: var(--db-copper-bright);
}

.page-home .home-cover__index {
  grid-area: index;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 18px;
  font-family: var(--db-mono);
  font-size: 13px;
  letter-spacing: .1em;
}

.page-home .home-cover__indexlabel {
  font-size: 11px;
  color: var(--db-rock);
  letter-spacing: .2em;
}

.page-home .home-cover__index a {
  color: rgba(246, 242, 233, .72);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color .2s ease, border-color .2s ease;
}

.page-home .home-cover__index a:hover,
.page-home .home-cover__index a:focus-visible {
  color: var(--db-copper-bright);
  border-bottom-color: var(--db-copper-bright);
}

/* ---------- 速查三栏 ---------- */
.page-home .home-quick__cards {
  display: grid;
  gap: var(--home-gap);
  grid-template-columns: minmax(0, 1fr);
  margin-top: 34px;
}

.page-home .home-quick__card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--db-cream);
  border: 1px solid var(--db-line);
  border-radius: var(--db-radius);
  box-shadow: var(--db-shadow);
  padding: 24px 22px 20px;
}

.page-home .home-quick__card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 64px;
  height: 3px;
  background: var(--db-copper);
}

.page-home .home-quick__label {
  margin: 6px 0 0;
  font-size: 14px;
  letter-spacing: .06em;
  color: var(--db-body-text);
}

.page-home .home-quick__value {
  margin: 16px 0 4px;
  font-family: var(--db-mono);
  font-size: clamp(38px, 9vw, 56px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.01em;
  color: var(--db-ink);
}

.page-home .home-quick__unit {
  margin: 0;
  font-size: 13px;
  color: var(--db-rock);
}

.page-home .home-quick__lines {
  margin: 0;
  padding: 0;
  list-style: none;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height .34s ease, opacity .28s ease, margin-top .28s ease;
}

.page-home .home-quick__lines li {
  padding: 8px 0;
  border-top: 1px solid var(--db-line);
  font-size: 13px;
  line-height: 1.6;
  color: var(--db-body-text);
}

.page-home .home-quick__lines .db-num {
  color: var(--db-copper-deep);
  margin-right: 8px;
}

.page-home .home-quick__go {
  margin-top: auto;
  padding-top: 18px;
  align-self: flex-start;
  font-size: 14px;
  color: var(--db-copper-deep);
  text-decoration: none;
  border-bottom: 1px solid var(--db-copper);
  transition: color .2s ease, border-color .2s ease;
}

.page-home .home-quick__go:hover,
.page-home .home-quick__go:focus-visible {
  color: var(--db-ink);
  border-bottom-color: var(--db-ink);
}

@media (hover: hover) and (pointer: fine) {
  .page-home .home-quick__card:hover .home-quick__lines,
  .page-home .home-quick__card:focus-within .home-quick__lines {
    max-height: 190px;
    opacity: 1;
    margin-top: 16px;
  }
}

@media (hover: none) {
  .page-home .home-quick__lines {
    max-height: none;
    opacity: 1;
    margin-top: 16px;
  }
}

/* ---------- 版本快照 ---------- */
.page-home .home-snapshot {
  padding: clamp(48px, 8vw, 82px) 0;
}

.page-home .home-snapshot__inner {
  display: grid;
  gap: 26px;
  grid-template-columns: minmax(0, 1fr);
}

.page-home .home-snapshot .db-kicker {
  color: var(--db-copper-bright);
}

.page-home .home-snapshot .db-section__title {
  margin-top: 12px;
  color: var(--db-cream);
}

.page-home .home-snapshot__big {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
  margin: 24px 0 0;
  padding: 18px 0 18px 20px;
  border-left: 1px solid var(--db-copper);
}

.page-home .home-snapshot__big .db-num {
  font-family: var(--db-mono);
  font-size: clamp(52px, 13vw, 88px);
  font-weight: 600;
  line-height: .9;
  letter-spacing: -.02em;
  color: var(--db-copper-bright);
}

.page-home .home-snapshot__bigunit {
  font-size: 14px;
  letter-spacing: .06em;
  color: rgba(246, 242, 233, .72);
}

.page-home .home-snapshot__text {
  max-width: 60ch;
  margin: 20px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(246, 242, 233, .78);
}

.page-home .home-snapshot__facts {
  display: grid;
  gap: 14px;
  grid-template-columns: minmax(0, 1fr);
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid rgba(198, 189, 171, .22);
}

.page-home .home-snapshot__fact {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: 14px;
  color: rgba(246, 242, 233, .74);
}

.page-home .home-snapshot__fact .db-num {
  font-family: var(--db-mono);
  font-size: 28px;
  font-weight: 600;
  color: var(--db-celadon-light);
}

.page-home .home-snapshot__body .db-btn {
  margin-top: 30px;
}

/* ---------- 版本索引带 ---------- */
.page-home .home-versions__grid {
  display: grid;
  gap: var(--home-gap);
  grid-template-columns: minmax(0, 1fr);
  margin-top: 34px;
}

.page-home .home-versions__scan {
  margin: 0;
}

.page-home .home-versions__scan img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--db-line);
  border-radius: var(--db-radius);
  filter: grayscale(.35) sepia(.16);
}

.page-home .home-versions__scan figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--db-rock);
}

.page-home .home-versions__tape {
  display: grid;
  gap: 12px;
  grid-template-columns: minmax(0, 1fr);
  align-content: start;
}

.page-home .home-versions__item {
  background: var(--db-cream);
  border: 1px solid var(--db-line);
  border-left: 3px solid var(--db-copper);
  border-radius: var(--db-radius);
}

.page-home .home-versions__item summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}

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

.page-home .home-versions__item summary::after {
  content: "＋";
  font-family: var(--db-mono);
  font-size: 12px;
  color: var(--db-copper-deep);
  margin-left: 4px;
}

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

.page-home .home-versions__year {
  font-family: var(--db-mono);
  font-size: 20px;
  font-weight: 600;
  color: var(--db-ink);
  margin-right: auto;
}

.page-home .home-versions__depth {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--db-celadon);
  border: 1px solid var(--db-celadon-light);
  border-radius: var(--db-radius);
  padding: 2px 8px;
}

.page-home .home-versions__panel {
  padding: 0 16px 16px;
  border-top: 1px solid var(--db-line);
}

.page-home .home-versions__panel p {
  margin: 12px 0 10px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--db-body-text);
}

.page-home .home-versions__panel a {
  font-size: 13px;
  color: var(--db-copper-deep);
  text-decoration: none;
  border-bottom: 1px solid var(--db-copper);
}

.page-home .home-versions__panel a:hover,
.page-home .home-versions__panel a:focus-visible {
  color: var(--db-ink);
  border-bottom-color: var(--db-ink);
}

/* ---------- 服务路径 ---------- */
.page-home .home-path__steps {
  display: grid;
  gap: var(--home-gap);
  grid-template-columns: minmax(0, 1fr);
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.page-home .home-path__step {
  position: relative;
  padding: 22px 20px 18px;
  background: var(--db-cream);
  border: 1px solid var(--db-line);
  border-radius: var(--db-radius);
}

.page-home .home-path__step::before {
  content: "";
  position: absolute;
  top: 0;
  left: 20px;
  right: 20px;
  height: 1px;
  background: linear-gradient(90deg, var(--db-copper) 0%, rgba(169, 118, 47, 0) 100%);
}

.page-home .home-path__num {
  display: block;
  font-family: var(--db-mono);
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--db-copper-deep);
}

.page-home .home-path__step h3 {
  margin: 10px 0 8px;
  font-family: var(--db-serif);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--db-ink);
}

.page-home .home-path__step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--db-body-text);
}

.page-home .home-path__meta {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 12px;
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--db-line);
  font-size: 13px;
}

.page-home .home-path__meta dt {
  color: var(--db-rock);
}

.page-home .home-path__meta dd {
  margin: 0;
  color: var(--db-body-text);
}

.page-home .home-path__meta .db-num {
  font-family: var(--db-mono);
  color: var(--db-copper-deep);
}

.page-home .home-path__figure {
  margin: 34px 0 0;
}

.page-home .home-path__figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--db-line);
  border-radius: var(--db-radius);
  filter: grayscale(.34) sepia(.14);
}

.page-home .home-path__figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--db-rock);
}

/* ---------- 常见去处 ---------- */
.page-home .home-routes__split {
  display: grid;
  gap: var(--home-gap);
  grid-template-columns: minmax(0, 1fr);
  margin-top: 34px;
}

.page-home .home-routes__aside {
  padding: 22px 20px;
  background: var(--db-paper);
  border: 1px solid var(--db-line);
  border-radius: var(--db-radius);
}

.page-home .home-routes__aside p {
  margin: 0 0 20px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--db-body-text);
}

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

.page-home .home-routes__list li {
  border-bottom: 1px solid var(--db-line);
}

.page-home .home-routes__list a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 14px;
  align-items: baseline;
  padding: 18px 4px;
  text-decoration: none;
  transition: background-color .2s ease, padding-left .2s ease;
}

.page-home .home-routes__list a:hover,
.page-home .home-routes__list a:focus-visible {
  background: rgba(169, 118, 47, .07);
  padding-left: 10px;
}

.page-home .home-routes__no {
  font-family: var(--db-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--db-copper-deep);
  grid-row: span 2;
}

.page-home .home-routes__name {
  font-family: var(--db-serif);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--db-ink);
}

.page-home .home-routes__desc {
  grid-column: 2;
  font-size: 13px;
  line-height: 1.7;
  color: var(--db-body-text);
}

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

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

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

@media (min-width: 1024px) {
  .page-home .home-cover {
    padding: calc(var(--db-header-h) + 58px) 0 76px;
  }

  .page-home .home-cover__inner {
    grid-template-columns: minmax(0, 1.5fr) 210px;
    grid-template-areas:
      "masthead index"
      "headline index";
    column-gap: 56px;
    row-gap: 42px;
    align-items: start;
  }

  .page-home .home-cover__index {
    flex-direction: column;
    flex-wrap: nowrap;
    align-items: flex-start;
    gap: 20px;
    padding-left: 22px;
    border-left: 1px solid rgba(169, 118, 47, .5);
    margin-top: 6px;
  }

  .page-home .home-cover__indexlabel {
    letter-spacing: .22em;
  }

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

  .page-home .home-snapshot__inner {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    column-gap: 64px;
  }

  .page-home .home-versions__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    column-gap: 48px;
    align-items: start;
  }

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

  .page-home .home-path__steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    column-gap: 18px;
  }

  .page-home .home-path__step h3 {
    font-size: 18px;
  }

  .page-home .home-routes__split {
    grid-template-columns: minmax(0, 3fr) minmax(0, 8fr);
    column-gap: 48px;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .home-quick__lines,
  .page-home .home-cover__index a,
  .page-home .home-routes__list a {
    transition: none;
  }
}
</main>