.page-about {
  --about-rail: 52px;
  --about-col-gap: clamp(20px, 3vw, 44px);
  --about-block: clamp(44px, 6vw, 92px);
}

@media (min-width: 860px) {
  .page-about {
    --about-rail: 78px;
  }
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(34px, 6vw, 88px) 0 clamp(38px, 5.5vw, 76px);
  background:
    linear-gradient(110deg, var(--ink-800) 0 44%, transparent 44.2%),
    var(--ink-900);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -18%;
  right: -12%;
  width: 62%;
  height: 130%;
  background: radial-gradient(closest-side, rgba(43, 245, 200, 0.13), transparent 72%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4.5vw, 68px);
}

@media (min-width: 1000px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
  }
}

.page-about .about-hero__eyebrow {
  margin: 20px 0 14px;
  color: var(--cyan-glow);
}

.page-about .about-hero__title {
  margin: 0 0 clamp(16px, 2vw, 24px);
  font-size: clamp(36px, 6.2vw, 72px);
  line-height: 1.06;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--text-hi);
}

.page-about .about-hero__lede {
  max-width: 60ch;
  margin: 0 0 clamp(22px, 2.6vw, 34px);
  font-size: clamp(15px, 1.15vw, 17px);
  line-height: 1.85;
  color: var(--text-mid);
}

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

.page-about .about-hero__board {
  align-self: stretch;
}

.page-about .about-hero__board-label {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--text-mid);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line-mint);
  border: 1px solid var(--line-mint);
  border-radius: var(--radius);
}

.page-about .about-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 14px 18px;
  background: var(--ink-800);
}

.page-about .about-hero__stat-num {
  font-size: clamp(26px, 2.6vw, 34px);
  font-weight: 900;
  line-height: 1.1;
  color: var(--cyan-glow);
}

.page-about .about-hero__stat-label {
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--text-mid);
}

/* ---------- 竖向时间轴 ---------- */
.page-about .about-flow {
  padding: clamp(40px, 5.5vw, 88px) 0 clamp(28px, 4vw, 56px);
  background: var(--ink-900);
}

.page-about .tl-item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  padding-bottom: clamp(38px, 5vw, 74px);
}

@media (min-width: 860px) {
  .page-about .tl-item {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    column-gap: var(--about-col-gap);
    gap: 0;
  }

  .page-about .tl-item::before {
    content: "";
    position: absolute;
    top: 10px;
    bottom: 0;
    left: calc(var(--about-rail) - 1px);
    width: 1px;
    background: var(--line-mint);
  }

  .page-about .tl-item:last-child::before {
    background: linear-gradient(var(--line-mint), transparent 88%);
  }
}

.page-about .tl-item__mark {
  display: flex;
  align-items: center;
  gap: 12px;
}

@media (min-width: 860px) {
  .page-about .tl-item__mark {
    position: relative;
    flex-direction: column;
    align-items: flex-end;
    gap: 14px;
    padding-top: 3px;
  }
}

.page-about .tl-item__year {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.16em;
  color: var(--cyan-glow);
}

@media (min-width: 860px) {
  .page-about .tl-item__year {
    writing-mode: vertical-rl;
    font-size: 12px;
    letter-spacing: 0.34em;
  }
}

.page-about .tl-item__dot {
  flex: none;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan-glow);
  box-shadow: 0 0 0 4px rgba(43, 245, 200, 0.14);
}

@media (min-width: 860px) {
  .page-about .tl-item__dot {
    margin-right: -4px;
  }
}

.page-about .tl-item__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 36px);
}

@media (min-width: 1000px) {
  .page-about .tl-item__body {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .tl-item:nth-of-type(even) .tl-item__body {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-about .tl-item:nth-of-type(even) .tl-item__main {
    order: 2;
  }

  .page-about .tl-item:nth-of-type(even) .tl-item__side {
    order: 1;
  }

  .page-about .tl-item--wide .tl-item__body {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .tl-item--wide .tl-item__main,
  .page-about .tl-item--wide .tl-item__side {
    order: 0;
  }
}

.page-about .tl-item__title {
  margin: 6px 0 16px;
  font-size: clamp(23px, 2.6vw, 32px);
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text-hi);
}

.page-about .tl-item__main p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text-mid);
}

.page-about .tl-item__key {
  margin: 20px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-mint);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--text-hi);
}

.page-about .tl-item__key .numeric {
  margin-right: 6px;
  font-size: 24px;
  color: var(--amber-signal);
}

.page-about .tl-note {
  padding: 20px 20px 22px;
  border: 1px solid var(--line-mint);
  border-radius: var(--radius);
  background: var(--ink-800);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.4);
}

.page-about .tl-note__cap {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--amber-signal);
}

.page-about .tl-note__text {
  margin: 0 0 16px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-mid);
}

.page-about .tl-note__link {
  display: inline-block;
  font-size: 14px;
  font-weight: 700;
  color: var(--cyan-glow);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 245, 200, 0.42);
  padding-bottom: 2px;
  transition: border-color 0.22s var(--ease);
}

.page-about .tl-note__link:hover,
.page-about .tl-note__link:focus-visible {
  border-bottom-color: var(--cyan-glow);
}

/* ---------- 插图 ---------- */
.page-about .tl-figure {
  margin: 0;
  border: 1px solid var(--line-mint);
  border-radius: var(--radius);
  background: var(--ink-800);
  overflow: hidden;
}

.page-about .tl-figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .media__caption {
  padding: 11px 14px;
  border-top: 1px solid var(--line-mint);
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-mid);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: var(--about-block) 0;
}

.page-about .about-team.band--paper {
  background: var(--paper-050);
  color: var(--ink-900);
}

.page-about .about-team__head {
  max-width: 66ch;
  margin-bottom: clamp(24px, 3vw, 40px);
}

.page-about .about-team__eyebrow {
  color: var(--ink-700);
  margin-bottom: 12px;
}

.page-about .about-team__title {
  margin: 0 0 14px;
  font-size: clamp(24px, 3vw, 36px);
  line-height: 1.2;
  font-weight: 900;
  letter-spacing: -0.015em;
  color: var(--ink-900);
}

.page-about .about-team__lede {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-700);
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: rgba(18, 36, 31, 0.18);
  border: 1px solid rgba(18, 36, 31, 0.18);
}

@media (min-width: 820px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-team__card {
  padding: clamp(20px, 2.4vw, 30px);
  background: var(--paper-050);
  transition: background 0.22s var(--ease), box-shadow 0.22s var(--ease);
}

.page-about .about-team__card:hover,
.page-about .about-team__card:focus-within {
  background: #ffffff;
  box-shadow: inset 0 0 0 1px var(--cyan-glow);
}

.page-about .about-team__num {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: clamp(38px, 4.6vw, 54px);
  font-weight: 900;
  line-height: 1;
  color: var(--ink-900);
}

.page-about .about-team__role {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 800;
  color: var(--ink-900);
}

.page-about .about-team__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-700);
}

.page-about .about-team__detail {
  margin: 14px 0 0;
  padding-top: 13px;
  border-top: 1px dashed rgba(18, 36, 31, 0.24);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--ink-700);
}

@media (min-width: 820px) {
  .page-about .about-team__detail {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .page-about .about-team__card:hover .about-team__detail,
  .page-about .about-team__card:focus-within .about-team__detail {
    display: block;
    overflow: visible;
  }
}

.page-about .about-team__key {
  margin: clamp(22px, 2.6vw, 34px) 0 0;
  padding-top: 16px;
  border-top: 1px solid rgba(18, 36, 31, 0.2);
  font-size: 15px;
  font-weight: 700;
  color: var(--ink-900);
}

.page-about .about-team__key .numeric {
  margin-right: 6px;
  font-size: 24px;
  color: #1B6E58;
}

/* ---------- 协作 ---------- */
.page-about .about-partners {
  padding: var(--about-block) 0;
  background: var(--ink-800);
  border-top: 1px solid var(--line-mint);
}

.page-about .about-partners__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
}

@media (min-width: 1000px) {
  .page-about .about-partners__inner {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
  }
}

.page-about .about-partners__title {
  margin: 6px 0 16px;
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.22;
  font-weight: 900;
  letter-spacing: -0.015em;
  color: var(--text-hi);
}

.page-about .about-partners__main p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text-mid);
}

.page-about .about-partners__list {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-mint);
}

.page-about .about-partners__item {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line-mint);
}

.page-about .about-partners__num {
  flex: none;
  min-width: 58px;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 900;
  line-height: 1;
  color: var(--cyan-glow);
}

.page-about .about-partners__label {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text-hi);
}

/* ---------- 服务范围 ---------- */
.page-about .about-reach {
  padding: var(--about-block) 0;
  background:
    radial-gradient(120% 100% at 6% 0%, rgba(43, 245, 200, 0.09), transparent 58%),
    var(--ink-900);
  border-top: 1px solid var(--line-mint);
}

.page-about .about-reach__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
}

@media (min-width: 900px) {
  .page-about .about-reach__inner {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: center;
  }
}

.page-about .about-reach__figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-mint);
  border: 1px solid var(--line-mint);
}

.page-about .about-reach__figure {
  padding: 20px 16px 22px;
  background: var(--ink-900);
}

.page-about .about-reach__figure:last-child {
  grid-column: 1 / -1;
}

.page-about .about-reach__num {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4vw, 46px);
  font-weight: 900;
  line-height: 1;
  color: var(--cyan-glow);
}

.page-about .about-reach__label {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-mid);
}

.page-about .about-reach__text .eyebrow {
  color: var(--amber-signal);
}

.page-about .about-reach__title {
  margin: 8px 0 16px;
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.22;
  font-weight: 900;
  letter-spacing: -0.015em;
  color: var(--text-hi);
}

.page-about .about-reach__text p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text-mid);
}

/* ---------- 后续入口 ---------- */
.page-about .about-next {
  padding: clamp(38px, 5vw, 68px) 0;
  background: var(--ink-700);
  border-top: 1px solid var(--line-mint);
}

.page-about .about-next__title {
  margin: 0 0 clamp(20px, 2.6vw, 30px);
  font-size: clamp(20px, 2.2vw, 26px);
  font-weight: 800;
  color: var(--text-hi);
}

.page-about .about-next__links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-mint);
  border: 1px solid var(--line-mint);
}

@media (min-width: 720px) {
  .page-about .about-next__links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1100px) {
  .page-about .about-next__links {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-next__link {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 18px 22px;
  background: var(--ink-700);
  text-decoration: none;
  transition: background 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  background: var(--ink-800);
  transform: translateY(-2px);
}

.page-about .about-next__link-text {
  font-size: 16px;
  font-weight: 800;
  color: var(--cyan-glow);
}

.page-about .about-next__link-hint {
  font-size: 13px;
  line-height: 1.65;
  color: var(--text-mid);
}