.page-about {
  --about-rail-w: 172px;
  --about-tick: rgba(168, 122, 44, .3);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(28px, 5vw, 64px) 0 clamp(28px, 4vw, 48px);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -10%;
  width: 60%;
  height: 90%;
  background: radial-gradient(58% 62% at 74% 42%, rgba(168, 122, 44, .22), transparent 72%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 32px;
}

.page-about .about-hero__lead h1 {
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(36px, 6vw, 80px);
  line-height: 1.08;
  letter-spacing: .01em;
  margin: 14px 0 20px;
  color: var(--paper);
}

.page-about .about-hero__hl {
  color: var(--gold);
  box-shadow: inset 0 -0.16em 0 rgba(227, 183, 90, .22);
}

.page-about .about-hero__lead .lede {
  max-width: 62ch;
  color: rgba(242, 237, 228, .82);
}

.page-about .about-hero__aside {
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  background: linear-gradient(170deg, rgba(20, 22, 26, .92), rgba(11, 12, 14, .55));
  padding: 20px 20px 22px;
  border-radius: 2px 22px 2px 22px;
}

.page-about .about-hero__aside-title {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gold-dark);
  margin: 0 0 16px;
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 18px;
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 3px;
  border-left: 1px solid var(--hairline-soft);
  padding-left: 12px;
}

.page-about .about-hero__facts .num {
  font-family: var(--mono);
  font-size: 22px;
  line-height: 1.1;
  letter-spacing: .02em;
  color: var(--gold);
}

.page-about .about-hero__label {
  font-size: 12.5px;
  color: var(--neutral);
  letter-spacing: .04em;
}

/* ---------- 通栏主图 ---------- */
.page-about .about-banner {
  position: relative;
  margin: 0;
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  overflow: hidden;
}

.page-about .about-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(.78) contrast(1.06);
}

.page-about .about-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(118% 104% at 50% 38%, transparent 34%, rgba(11, 12, 14, .78) 100%);
  pointer-events: none;
}

/* ---------- 轨道 + 正文 ---------- */
.page-about .about-layout {
  padding-top: clamp(36px, 5vw, 72px);
  padding-bottom: clamp(40px, 6vw, 88px);
}

.page-about .about-rail {
  display: none;
}

.page-about .about-flow {
  min-width: 0;
}

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  padding: clamp(34px, 5vw, 66px) 0;
  border-top: 1px solid var(--hairline-soft);
}

.page-about .about-chapter:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-chapter--char {
  background: linear-gradient(180deg, rgba(20, 22, 26, .92), rgba(20, 22, 26, .45));
  border-top-color: transparent;
  border-radius: 2px 26px 2px 26px;
  padding-left: clamp(16px, 3vw, 34px);
  padding-right: clamp(16px, 3vw, 34px);
}

.page-about .about-chapter__head {
  margin-bottom: clamp(22px, 3vw, 34px);
  max-width: 68ch;
}

.page-about .about-chapter__head h2 {
  font-family: var(--sans);
  font-weight: 700;
  font-size: clamp(24px, 3.4vw, 36px);
  letter-spacing: .07em;
  line-height: 1.28;
  margin: 10px 0 14px;
  color: var(--paper);
}

.page-about .about-chapter__lede {
  font-size: 16.5px;
  line-height: 1.85;
  color: rgba(242, 237, 228, .76);
  margin: 0;
}

/* ---------- 里程碑 ---------- */
.page-about .about-milestones {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-milestone {
  position: relative;
  padding: 0 0 34px 30px;
  background-image: repeating-linear-gradient(180deg, var(--about-tick) 0 5px, transparent 5px 13px);
  background-size: 1px 100%;
  background-repeat: no-repeat;
  background-position: left top;
  scroll-margin-top: 128px;
}

.page-about .about-milestone:last-child {
  padding-bottom: 0;
}

.page-about .about-milestone::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gold-dark);
  box-shadow: 0 0 0 4px rgba(168, 122, 44, .14);
}

.page-about .about-milestone__year .num {
  display: inline-block;
  font-family: var(--mono);
  font-size: 22px;
  letter-spacing: .05em;
  color: var(--gold);
  padding-right: 14px;
}

.page-about .about-milestone__body h3 {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: .05em;
  margin: 2px 0 10px;
  color: var(--paper);
}

.page-about .about-milestone__body p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(242, 237, 228, .74);
}

.page-about .about-milestone__more {
  margin-top: 0;
  font-size: 14px;
  color: var(--neutral);
  border-left: 2px solid var(--hairline);
  padding-left: 12px;
  transition: max-height .45s var(--ease), opacity .35s var(--ease), margin-top .45s var(--ease);
  max-height: 320px;
  opacity: 1;
  overflow: hidden;
}

/* ---------- 团队 ---------- */
.page-about .about-team-layout {
  display: grid;
  gap: 28px;
}

.page-about .about-team {
  display: grid;
  gap: 18px;
}

.page-about .about-team__card {
  background: linear-gradient(158deg, rgba(11, 12, 14, .96), rgba(20, 22, 26, .82));
  border: 1px solid var(--hairline-soft);
  border-top: 2px solid var(--gold-dark);
  border-radius: 2px 20px 2px 20px;
  padding: 22px 20px 24px;
}

.page-about .about-team__num {
  display: block;
  font-family: var(--mono);
  font-size: clamp(46px, 9vw, 72px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--gold);
}

.page-about .about-team__unit {
  display: block;
  margin: 10px 0 12px;
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--gold-dark);
}

.page-about .about-team__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(242, 237, 228, .72);
}

/* ---------- 配图 ---------- */
.page-about .about-shot {
  margin: 0;
  border: 1px solid var(--hairline-soft);
  background: var(--ink);
  border-radius: 2px 18px 2px 18px;
  overflow: hidden;
}

.page-about .about-shot img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(.8) contrast(1.05);
}

.page-about .about-shot--tall img {
  aspect-ratio: 4 / 3;
}

.page-about .about-shot figcaption {
  padding: 12px 14px;
  border-top: 1px solid var(--hairline-soft);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--neutral);
}

/* ---------- 文档 ---------- */
.page-about .about-docs__tags {
  margin-bottom: 22px;
}

.page-about .about-docs {
  display: grid;
  gap: 26px;
}

.page-about .about-docs__text p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(242, 237, 228, .76);
}

.page-about .about-docs__text .callout {
  margin-top: 18px;
}

.page-about .about-docs__text .callout p {
  margin: 0;
  font-size: 14.5px;
  color: rgba(242, 237, 228, .8);
}

/* ---------- 三端 ---------- */
.page-about .about-ends {
  display: grid;
  gap: 18px;
}

.page-about .about-end {
  position: relative;
  padding: 22px 20px 24px;
  border: 1px solid var(--hairline-soft);
  border-radius: 18px 2px 18px 2px;
  background: linear-gradient(200deg, rgba(11, 12, 14, .9), rgba(20, 22, 26, .5));
}

.page-about .about-end--now {
  border-color: rgba(227, 183, 90, .42);
  background: linear-gradient(200deg, rgba(168, 122, 44, .16), rgba(11, 12, 14, .78));
}

.page-about .about-end__stage {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--neutral);
  border-bottom: 1px solid var(--hairline);
  padding-bottom: 5px;
  margin-bottom: 14px;
}

.page-about .about-end--now .about-end__stage {
  color: var(--gold);
  border-bottom-color: rgba(227, 183, 90, .5);
}

.page-about .about-end h3 {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: .06em;
  margin: 0 0 10px;
  color: var(--paper);
}

.page-about .about-end p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(242, 237, 228, .72);
}

.page-about .about-end__spec {
  margin-top: 14px !important;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .05em;
  color: var(--gold);
  border-top: 1px dashed var(--hairline);
  padding-top: 12px;
}

/* ---------- 服务范围 ---------- */
.page-about .about-scope__path {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-scope__path li {
  border-left: 2px solid var(--steel);
  padding: 4px 0 4px 18px;
}

.page-about .about-scope__step {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--steel);
  margin-bottom: 8px;
}

.page-about .about-scope__path p {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: rgba(242, 237, 228, .76);
}

/* ---------- 长期维护 ---------- */
.page-about .about-upkeep {
  display: grid;
  gap: 18px;
}

.page-about .about-upkeep__item {
  border-top: 1px solid var(--hairline);
  padding-top: 18px;
}

.page-about .about-upkeep__cycle {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--gold-dark);
  margin-bottom: 10px;
}

.page-about .about-upkeep__item h3 {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: .05em;
  margin: 0 0 8px;
  color: var(--paper);
}

.page-about .about-upkeep__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(242, 237, 228, .72);
}

.page-about .about-upkeep__link {
  margin: 26px 0 0;
}

/* ---------- 收束 ---------- */
.page-about .about-chapter--close {
  border-top-color: var(--hairline);
}

.page-about .about-close {
  max-width: 56ch;
}

.page-about .about-close h2 {
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1.2;
  letter-spacing: .01em;
  margin: 12px 0 16px;
  color: var(--paper);
}

.page-about .about-close p {
  margin: 0 0 24px;
  font-size: 15.5px;
  line-height: 1.88;
  color: rgba(242, 237, 228, .76);
}

.page-about .about-close__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-milestone {
    display: grid;
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 26px;
    padding-left: 34px;
  }

  .page-about .about-milestone__year .num {
    font-size: 24px;
  }

  .page-about .about-milestone__body h3 {
    margin-top: 0;
  }

  .page-about .about-milestone__more {
    max-height: 0;
    opacity: 0;
    margin-top: 0;
  }

  .page-about .about-milestone:hover .about-milestone__more,
  .page-about .about-milestone:focus-within .about-milestone__more {
    max-height: 320px;
    opacity: 1;
    margin-top: 12px;
  }

  .page-about .about-docs {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .about-upkeep {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
  }

  .page-about .about-ends {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-scope__path {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, .88fr);
    gap: 52px;
    align-items: end;
  }

  .page-about .about-hero__aside {
    padding: 24px 24px 26px;
  }

  .page-about .about-team {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    display: grid;
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: 54px;
    align-items: start;
  }

  .page-about .about-rail {
    display: block;
    position: sticky;
    top: 118px;
    align-self: start;
  }

  .page-about .about-team-layout {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: 34px;
    align-items: start;
  }

  .page-about .about-team__card:nth-child(2),
  .page-about .about-team__card:nth-child(4) {
    margin-top: 30px;
  }
}

@media (min-width: 1280px) {
  .page-about .about-rail__link {
    padding: 11px 14px;
  }
}

/* ---------- 轨道样式 ---------- */
.page-about .about-rail__title {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--neutral);
  margin: 0 0 16px;
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--hairline);
}

.page-about .about-rail__link {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 10px 14px;
  margin-left: -1px;
  border-left: 2px solid transparent;
  text-decoration: none;
  color: var(--neutral);
  transition: color .3s var(--ease), border-color .3s var(--ease), background-color .3s var(--ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--paper);
  background: rgba(20, 22, 26, .6);
}

.page-about .about-rail__link[aria-current="true"],
.page-about .about-rail__link.is-active {
  color: var(--gold);
  border-left-color: var(--gold);
  background: linear-gradient(90deg, rgba(227, 183, 90, .14), transparent 88%);
}

.page-about .about-rail__num {
  font-family: var(--mono);
  font-size: 14px;
  letter-spacing: .04em;
}

.page-about .about-rail__label {
  font-size: 12.5px;
  letter-spacing: .04em;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-milestone__more {
    transition: none;
    max-height: none;
    opacity: 1;
  }
}
</｜｜DSML｜｜ parameter>
</invoke>