.page-about {
  --about-line: rgba(201, 162, 39, .38);
  --about-hair: rgba(56, 42, 85, .14);
  --about-body: 46ch;
  display: block;
  background: var(--cream);
  color: var(--purple);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-about .crumbs {
  padding-top: clamp(16px, 2.4vw, 26px);
  padding-bottom: clamp(8px, 1.6vw, 16px);
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--stone);
}

.page-about .crumbs a {
  color: var(--purple-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(106, 78, 150, .4);
}

.page-about .crumbs a:hover {
  color: var(--purple);
  border-bottom-color: var(--gold);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 0 0 clamp(30px, 4.5vw, 56px);
  background:
    radial-gradient(circle at 84% 8%, rgba(47, 210, 196, .20), transparent 56%),
    radial-gradient(circle at 6% 96%, rgba(201, 162, 39, .18), transparent 50%),
    linear-gradient(158deg, var(--purple-deep) 0%, var(--purple) 58%, #4A3568 100%);
  color: var(--cream);
  clip-path: polygon(0 0, 100% 0, 100% 95%, 0 100%);
  padding-top: clamp(26px, 4vw, 46px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  align-items: end;
}

.page-about .eyebrow {
  color: var(--gold-bright);
  letter-spacing: .3em;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 6.2vw, 4.2rem);
  line-height: 1.14;
  letter-spacing: -.01em;
  margin: 14px 0 18px;
  color: var(--cream);
  text-wrap: balance;
}

.page-about .about-hero__lead {
  max-width: var(--about-body);
  font-size: clamp(.94rem, 1.55vw, 1.05rem);
  line-height: 1.9;
  color: rgba(244, 239, 230, .85);
  margin: 0;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: clamp(20px, 3vw, 30px) 0 0;
}

.page-about .about-hero__fig {
  margin: 0;
  border-radius: 4px 70px 4px 70px;
  overflow: hidden;
  border: 1px solid rgba(232, 199, 102, .32);
  box-shadow: 0 24px 60px rgba(20, 12, 38, .45);
}

.page-about .about-hero__fig img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(1.08);
}

/* 数字条 */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(28px, 4vw, 46px) auto 0;
  position: relative;
  background: rgba(232, 199, 102, .22);
  border: 1px solid rgba(232, 199, 102, .22);
}

.page-about .about-stats__item {
  background: rgba(43, 32, 68, .72);
  padding: clamp(14px, 2vw, 20px) clamp(12px, 1.8vw, 18px);
}

.page-about .about-stats dt {
  font-size: .7rem;
  letter-spacing: .22em;
  color: rgba(232, 199, 102, .88);
  margin-bottom: 6px;
}

.page-about .about-stats dd {
  margin: 0;
  font-size: clamp(.9rem, 1.5vw, 1rem);
  color: var(--cream);
}

.page-about .about-stats .num {
  font-size: clamp(1.35rem, 3vw, 1.9rem);
  color: var(--gold-bright);
  margin-right: 4px;
}

/* ---------- 通用章节骨架 ---------- */
.page-about .about-block {
  position: relative;
  padding: clamp(48px, 7vw, 96px) 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-block:first-of-type {
  border-top: 0;
}

.page-about .about-block__grid {
  display: grid;
  gap: clamp(24px, 3.6vw, 48px);
}

.page-about .about-block__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 3.9vw, 2.5rem);
  line-height: 1.22;
  margin: 12px 0 0;
  color: var(--purple);
  text-wrap: balance;
}

.page-about .about-block__title::after {
  content: "";
  display: block;
  width: 0;
  height: 2px;
  margin-top: 14px;
  background: linear-gradient(90deg, var(--gold), var(--cyan));
  transition: width .55s var(--ease);
}

.page-about .about-block.is-current .about-block__title::after {
  width: 88px;
}

.page-about .about-block__note {
  margin: 18px 0 0;
  font-size: .88rem;
  line-height: 1.85;
  color: var(--stone);
  max-width: 34ch;
}

.page-about .about-block__body p {
  margin: 0 0 14px;
  font-size: clamp(.92rem, 1.5vw, 1rem);
  line-height: 1.9;
  max-width: 62ch;
}

.page-about .about-block__body p:last-child {
  margin-bottom: 0;
}

.page-about .about-block--moss {
  background:
    radial-gradient(circle at 92% 6%, rgba(76, 107, 79, .16), transparent 52%),
    var(--cream);
}

.page-about .about-block--deep {
  background:
    radial-gradient(circle at 10% 0%, rgba(106, 78, 150, .55), transparent 58%),
    linear-gradient(150deg, var(--purple-deep), var(--purple));
  color: var(--cream);
  border-top-color: transparent;
  clip-path: polygon(0 2.6%, 100% 0, 100% 100%, 0 97.4%);
  padding-top: clamp(64px, 9vw, 120px);
  padding-bottom: clamp(64px, 9vw, 120px);
}

.page-about .about-block--deep .about-block__title {
  color: var(--cream);
}

.page-about .about-block--deep .about-block__note {
  color: rgba(244, 239, 230, .68);
}

.page-about .eyebrow--on-dark {
  color: var(--cyan);
}

/* ---------- 时间轴 ---------- */
.page-about .stage-track {
  list-style: none;
  margin: 0;
  padding: 0 0 0 34px;
  position: relative;
}

.page-about .stage-track::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold) 0%, rgba(201, 162, 39, .12) 100%);
}

.page-about .stage-track__item {
  position: relative;
  padding-bottom: clamp(28px, 4vw, 46px);
}

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

.page-about .stage-track__item::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 8px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--gold-bright);
  border: 2px solid var(--cream);
  box-shadow: 0 0 0 3px rgba(201, 162, 39, .2);
}

.page-about .stage-track__meta {
  font-size: .72rem;
  letter-spacing: .2em;
  color: var(--terracotta);
  margin: 0 0 6px;
}

.page-about .stage-track__meta .num {
  color: var(--purple-soft);
}

.page-about .stage-track__item h3 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.1rem, 2.4vw, 1.5rem);
  line-height: 1.35;
  margin: 0 0 8px;
  color: var(--purple);
}

.page-about .stage-track__item p {
  max-width: 58ch;
}

/* ---------- 职能小组 ---------- */
.page-about .team-figure {
  margin: 0 0 clamp(22px, 3vw, 34px);
  border-radius: 70px 4px 70px 4px;
  overflow: hidden;
  border: 1px solid rgba(76, 107, 79, .3);
}

.page-about .team-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .team-roster {
  border-bottom: 1px solid var(--about-hair);
}

.page-about .team-row {
  border-top: 1px solid var(--about-hair);
  padding: clamp(12px, 1.8vw, 18px) 0;
}

.page-about .team-row[open] {
  background: linear-gradient(90deg, rgba(201, 162, 39, .07), transparent 70%);
}

.page-about .team-row__head {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 8px 12px;
  cursor: pointer;
  list-style: none;
}

.page-about .team-row__head::-webkit-details-marker {
  display: none;
}

.page-about .team-row__head::after {
  content: "＋";
  font-family: var(--font-mono);
  font-size: .95rem;
  color: var(--purple-soft);
  justify-self: end;
}

.page-about .team-row[open] .team-row__head::after {
  content: "－";
  color: var(--gold);
}

.page-about .team-row__no {
  font-size: .78rem;
  letter-spacing: .1em;
  color: var(--terracotta);
}

.page-about .team-row__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.1rem, 2.6vw, 1.65rem);
  line-height: 1.3;
  color: var(--purple);
}

.page-about .team-row__head .tag {
  grid-column: 2 / span 1;
  justify-self: start;
}

.page-about .team-row__body {
  padding: 12px 0 4px;
}

.page-about .team-row__body p {
  max-width: 60ch;
  font-size: .92rem;
  line-height: 1.9;
  margin: 0 0 10px;
}

.page-about .team-row__note {
  font-size: .82rem !important;
  color: var(--moss);
  border-left: 2px solid rgba(76, 107, 79, .4);
  padding-left: 12px;
}

/* ---------- 一周节奏 ---------- */
.page-about .rhythm-grid {
  display: grid;
  gap: clamp(24px, 3.4vw, 40px);
  align-items: start;
}

.page-about .rhythm-copy p {
  max-width: 60ch;
}

.page-about .rhythm-list {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .rhythm-list li {
  display: grid;
  grid-template-columns: 5.4rem minmax(0, 1fr);
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--about-hair);
  font-size: .88rem;
  line-height: 1.75;
}

.page-about .rhythm-list .num {
  color: var(--cyan);
  font-size: .8rem;
  letter-spacing: .04em;
}

.page-about .rhythm-fig {
  margin: 0;
  border-radius: 4px 96px 4px 96px;
  overflow: hidden;
  border: 1px solid var(--about-line);
}

.page-about .rhythm-fig img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 工作方法 ---------- */
.page-about .method-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(18px, 2.6vw, 28px);
}

.page-about .method-steps > li {
  position: relative;
  padding-left: 20px;
  border-left: 2px solid rgba(185, 106, 75, .45);
}

.page-about .method-steps__no {
  font-size: .72rem !important;
  letter-spacing: .22em;
  color: var(--terracotta);
  margin: 0 0 6px !important;
}

.page-about .method-steps h3 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.05rem, 2.2vw, 1.35rem);
  margin: 0 0 8px;
  color: var(--purple);
}

.page-about .method-steps p {
  max-width: 58ch;
}

/* ---------- 公示信息 ---------- */
.page-about .disclosure-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .disclosure-list > li {
  padding: clamp(14px, 2vw, 20px) 0;
  border-bottom: 1px solid rgba(232, 199, 102, .2);
}

.page-about .disclosure-list > li:first-child {
  border-top: 1px solid rgba(232, 199, 102, .2);
}

.page-about .disclosure-list__label {
  font-size: .72rem !important;
  letter-spacing: .24em;
  color: var(--cyan) !important;
  margin: 0 0 8px !important;
}

.page-about .disclosure-list p {
  color: rgba(244, 239, 230, .88);
  max-width: 62ch;
  margin: 0 !important;
}

.page-about .disclosure-list .num {
  color: var(--gold-bright);
  word-break: break-all;
}

.page-about .disclosure-note {
  margin-top: clamp(20px, 3vw, 30px) !important;
  font-size: .84rem !important;
  line-height: 1.9;
  color: rgba(244, 239, 230, .68) !important;
  border-left: 2px solid var(--cyan);
  padding-left: 14px;
  max-width: 62ch;
}

.page-about .disclosure-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 210, 196, .5);
}

.page-about .disclosure-note a:hover {
  color: var(--gold-bright);
  border-bottom-color: var(--gold-bright);
}

/* ---------- 协作原则 ---------- */
.page-about .principle-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: principle;
}

.page-about .principle-list > li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: clamp(14px, 2vw, 20px) 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .principle-list > li:last-child {
  border-bottom: 1px solid var(--about-hair);
}

.page-about .principle-list__no {
  font-size: .72rem;
  letter-spacing: .22em;
  color: var(--gold);
}

.page-about .principle-list p {
  margin: 0;
  max-width: 62ch;
  font-size: .92rem;
  line-height: 1.85;
}

.page-about .principle-foot {
  margin-top: clamp(22px, 3vw, 32px) !important;
  font-size: .88rem !important;
  line-height: 2;
  color: var(--stone);
  max-width: 62ch;
}

.page-about .principle-foot a {
  color: var(--purple-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(106, 78, 150, .45);
}

.page-about .principle-foot a:hover {
  color: var(--purple);
  border-bottom-color: var(--gold);
}

/* ---------- 桌面端栅格与错位 ---------- */
@media (min-width: 760px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .team-row__head {
    grid-template-columns: 3rem minmax(0, 1fr) auto auto;
  }

  .page-about .team-row__head .tag {
    grid-column: 3 / span 1;
    justify-self: end;
  }

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

  .page-about .principle-list > li {
    grid-template-columns: 7rem minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-about .about-hero__title {
    grid-column: 1 / span 7;
  }

  .page-about .about-hero__fig {
    grid-column: 8 / span 5;
  }

  .page-about .about-block__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-about .about-block__head {
    grid-column: 1 / span 4;
    align-self: start;
    position: sticky;
    top: 84px;
  }

  .page-about .about-block__body {
    grid-column: 6 / span 7;
  }

  .page-about .about-block--deep .about-block__grid {
    align-items: start;
  }

  .page-about .rhythm-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  }

  .page-about .rhythm-fig {
    margin-top: 6px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-block__body {
    grid-column: 6 / span 6;
  }

  .page-about .about-hero__fig {
    grid-column: 8 / span 5;
    transform: translateY(-18px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-block__title::after,
  .page-about .about-hero__fig {
    transition: none;
    transform: none;
  }
}