.page-about {
  --about-scope-gap: clamp(28px, 5vw, 64px);
  --about-hairline: rgba(201, 162, 77, .26);
}

/* ---------- 首屏 ---------- */
.page-about__intro {
  padding-top: clamp(24px, 4vw, 40px);
}

.page-about__introinner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-scope-gap);
  align-items: start;
}

.page-about__introbody .xpj-h1 {
  margin-top: 14px;
  max-width: 20ch;
}

.page-about__introbody .xpj-lead {
  margin-top: 20px;
  max-width: 62ch;
}

.page-about__introacts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about__metagrid {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--hairline, var(--hair-soft));
  border-left: 1px solid var(--hairline, var(--hair-soft));
}

.page-about__metacell {
  padding: 18px 16px;
  border-right: 1px solid var(--hairline, var(--hair-soft));
  border-bottom: 1px solid var(--hairline, var(--hair-soft));
  background: linear-gradient(180deg, rgba(201, 162, 77, .05), transparent 70%);
}

.page-about__metalabel {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--slate);
}

.page-about__metavalue {
  margin: 8px 0 0;
  display: flex;
  align-items: baseline;
  gap: 6px;
  color: var(--gold-hi);
}

.page-about__metaunit {
  font-family: var(--sans);
  font-size: 14px;
  color: var(--slate);
  letter-spacing: .04em;
}

/* ---------- 页内章节目录 ---------- */
.page-about__tocwrap {
  position: sticky;
  top: 0;
  z-index: 6;
  margin-top: clamp(28px, 5vw, 52px);
  padding: 10px 0;
  background: rgba(10, 12, 16, .92);
  border-top: 1px solid var(--hairline, var(--hair-soft));
  border-bottom: 1px solid var(--hairline, var(--hair-soft));
  backdrop-filter: blur(8px);
}

.page-about__toc {
  display: flex;
  gap: 22px;
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: none;
}

.page-about__toc::-webkit-scrollbar {
  display: none;
}

.page-about__toc .xpj-toc__link {
  flex: 0 0 auto;
}

/* ---------- 通用区块 ---------- */
.page-about__block {
  padding-block: clamp(48px, 8vw, 96px);
}

.page-about__block--alt {
  background:
    linear-gradient(180deg, rgba(31, 36, 44, .55), rgba(10, 12, 16, .1) 60%),
    repeating-linear-gradient(90deg, rgba(92, 74, 36, .13) 0 1px, transparent 1px 96px);
}

.page-about__blockhead {
  max-width: 68ch;
}

.page-about__blockhead .xpj-h2 {
  margin-top: 12px;
}

.page-about__blockhead .xpj-p {
  margin-top: 16px;
}

.page-about__blocksplit {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-scope-gap);
  align-items: start;
}

.page-about__blocklead .xpj-h2 {
  margin-top: 12px;
}

.page-about__blocklead .xpj-p {
  margin-top: 18px;
}

.page-about__blockmedia {
  margin: 0;
}

/* ---------- 团队四列 ---------- */
.page-about__teams {
  list-style: none;
  margin: clamp(32px, 5vw, 56px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--hairline, var(--hair-soft));
}

.page-about__team {
  position: relative;
  padding: 22px 0 26px;
  border-bottom: 1px solid var(--line);
}

.page-about__teamline {
  display: block;
  width: 42px;
  height: 2px;
  margin-bottom: 14px;
  background: var(--gold);
  transition: width var(--dur-base) var(--ease);
}

.page-about__team[data-line="jade"] .page-about__teamline {
  background: var(--jade);
}

.page-about__team[data-line="signal"] .page-about__teamline {
  background: var(--signal);
}

.page-about__team:hover .page-about__teamline {
  width: 76px;
}

.page-about__teamnum {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--slate);
}

.page-about__team .xpj-h4 {
  margin-top: 8px;
}

.page-about__teamcount {
  margin: 6px 0 0;
  font-size: 14px;
  color: var(--gold-hi);
  letter-spacing: .04em;
}

.page-about__team .xpj-p {
  margin-top: 12px;
}

/* ---------- 时间轴 ---------- */
.page-about__tl {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0 0 20px;
  display: flex;
  gap: 0;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  border-bottom: 1px solid var(--hairline, var(--hair-soft));
  scrollbar-width: thin;
}

.page-about__tlnode {
  position: relative;
  flex: 0 0 auto;
  width: 268px;
  padding: 0 24px 8px 0;
  scroll-snap-align: start;
}

.page-about__tlyear {
  display: block;
  font-family: var(--mono);
  font-size: 15px;
  letter-spacing: .06em;
  color: var(--gold-hi);
}

.page-about__tldot {
  display: block;
  width: 9px;
  height: 9px;
  margin: 12px 0 18px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(201, 162, 77, .16);
  transition: box-shadow var(--dur-base) var(--ease);
}

.page-about__tlnode:hover .xpj-h4 {
  color: var(--gold-hi);
}

.page-about__tlnode:hover .page-about__tldot {
  box-shadow: 0 0 0 7px rgba(201, 162, 77, .24);
}

.page-about__tlnode .xpj-h4 {
  transition: color var(--dur-base) var(--ease);
}

.page-about__tlnode .xpj-p {
  margin-top: 10px;
  font-size: 14px;
  color: var(--slate);
}

.page-about__tlextra {
  margin: 0;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--jade);
  transition: max-height var(--dur-panel) var(--ease), opacity var(--dur-base) var(--ease), margin var(--dur-panel) var(--ease);
}

.page-about__tlnode:hover .page-about__tlextra,
.page-about__tlnode:focus-within .page-about__tlextra {
  max-height: 160px;
  opacity: 1;
  margin-top: 10px;
}

.page-about__growthfoot {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-scope-gap);
  align-items: center;
  margin-top: clamp(32px, 5vw, 56px);
}

.page-about__growthmedia {
  margin: 0;
}

.page-about__growthnote .xpj-h3 {
  margin-bottom: 14px;
}

.page-about__growthacts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

/* ---------- 运营节奏 ---------- */
.page-about__rhythm {
  margin-top: clamp(28px, 4vw, 48px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--hairline, var(--hair-soft));
}

.page-about__rhythmcard {
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
  transition: background var(--dur-base) var(--ease);
}

.page-about__rhythmcard:hover {
  background: rgba(201, 162, 77, .04);
}

.page-about__rhythmcard .xpj-eyebrow {
  margin: 0;
}

.page-about__rhythmcard .xpj-h4 {
  margin-top: 10px;
  font-family: var(--mono);
  letter-spacing: .04em;
  color: var(--mist);
}

.page-about__rhythmcard .xpj-p {
  margin-top: 12px;
  font-size: 14px;
  color: var(--slate);
}

/* ---------- 设备场景 ---------- */
.page-about__devgrid {
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about__devcard {
  display: flex;
  flex-direction: column;
}

.page-about__devcard .xpj-card__text {
  flex: 1 1 auto;
}

.page-about__devtag {
  margin: 18px 0 0;
}

.page-about__devmedia {
  margin: clamp(32px, 5vw, 56px) 0 0;
}

/* ---------- 执行标准 ---------- */
.page-about__qualsplit {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-scope-gap);
  align-items: start;
}

.page-about__qualbody .xpj-h2 {
  margin-top: 12px;
}

.page-about__qualbody > .xpj-p {
  margin: 18px 0 0;
}

.page-about__panel {
  margin-top: 14px;
}

.page-about__panel:first-of-type {
  margin-top: 32px;
}

.page-about__panel .xpj-panel__body .xpj-p {
  margin: 0;
  font-size: 14px;
  color: var(--slate);
}

.page-about__qualstat {
  padding: 24px 22px 26px;
  border: 1px solid var(--hairline, var(--hair-soft));
  background:
    linear-gradient(160deg, rgba(201, 162, 77, .08), transparent 58%),
    var(--panel);
}

.page-about__qualstatlabel {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--slate);
}

.page-about__qualstatvalue {
  margin: 10px 0 0;
  display: flex;
  align-items: baseline;
  gap: 6px;
  color: var(--gold-hi);
}

.page-about__qualstatunit {
  font-family: var(--sans);
  font-size: 14px;
  color: var(--slate);
}

.page-about__qualstattext {
  margin-top: 10px;
  font-size: 14px;
  color: var(--slate);
}

.page-about__qualstat .xpj-rule {
  margin: 24px 0;
}

/* ---------- 共建方式 ---------- */
.page-about__partners {
  margin-top: clamp(28px, 4vw, 48px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--hairline, var(--hair-soft));
}

.page-about__partner {
  position: relative;
  padding: 26px 0 28px 60px;
  border-bottom: 1px solid var(--line);
}

.page-about__partnernum {
  position: absolute;
  left: 0;
  top: 30px;
  font-family: var(--mono);
  font-size: 22px;
  letter-spacing: .06em;
  color: var(--hair-soft);
  transition: color var(--dur-base) var(--ease);
}

.page-about__partner:hover .page-about__partnernum {
  color: var(--gold-hi);
}

.page-about__partner .xpj-p {
  margin-top: 12px;
  max-width: 62ch;
}

.page-about__partnercta {
  margin-top: clamp(32px, 5vw, 52px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  align-items: center;
  padding: 26px 24px;
  border: 1px solid var(--hairline, var(--hair-soft));
  border-left: 3px solid var(--gold);
  background: var(--iron);
}

.page-about__partnercta .xpj-p {
  margin-top: 12px;
}

.page-about__contactline {
  font-family: var(--mono);
  color: var(--gold-hi);
  letter-spacing: .02em;
  word-break: break-all;
}

.page-about__partnercta .xpj-btn {
  justify-self: start;
}

/* ---------- 平板 ---------- */
@media (min-width: 700px) {
  .page-about__metagrid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about__team {
    padding-right: 26px;
  }

  .page-about__rhythm {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 36px;
  }

  .page-about__partners {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    column-gap: 32px;
  }

  .page-about__partner {
    padding-left: 0;
    padding-right: 12px;
  }

  .page-about__partnernum {
    position: static;
    display: block;
    margin-bottom: 10px;
  }

  .page-about__partnercta {
    grid-template-columns: 1fr auto;
    padding: 30px 32px;
  }

  .page-about__partnercta .xpj-btn {
    justify-self: end;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1024px) {
  .page-about__introinner {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, .85fr);
    align-items: end;
  }

  .page-about__blocksplit {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }

  .page-about__teams {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about__team {
    padding: 26px 26px 30px 0;
  }

  .page-about__rhythm {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    column-gap: 32px;
  }

  .page-about__growthfoot {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  }

  .page-about__qualsplit {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, .75fr);
  }

  .page-about__blockhead {
    max-width: 58ch;
  }
}

/* ---------- 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about__teamline,
  .page-about__tldot,
  .page-about__tlnode .xpj-h4,
  .page-about__tlextra,
  .page-about__partnernum,
  .page-about__rhythmcard {
    transition: none;
  }

  .page-about__tlnode .page-about__tlextra {
    max-height: none;
    opacity: 1;
    margin-top: 10px;
  }
}

.page-about {
  --hairline: currentColor;
}