.page-about {
  --about-rule: rgba(43, 33, 27, 0.13);
  --about-rule-soft: rgba(43, 33, 27, 0.08);
  --about-ink-soft: rgba(43, 33, 27, 0.72);
  background: var(--cream);
  color: var(--brown);
  font-family: var(--font-sans);
}

.page-about .breadcrumb {
  margin-bottom: clamp(18px, 3vw, 30px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(26px, 4.5vw, 48px) 0 clamp(34px, 5.5vw, 68px);
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(255, 106, 69, 0.1), transparent 55%),
    radial-gradient(90% 80% at 0% 100%, rgba(147, 183, 201, 0.18), transparent 62%),
    var(--cream);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 44px);
  align-items: end;
}

.page-about .about-hero__head .eyebrow {
  display: inline-block;
  margin: 0 0 14px;
  padding: 5px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--moss);
  background: rgba(47, 107, 88, 0.1);
  border-radius: 999px;
}

.page-about .about-hero__head h1 {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(2rem, 6.2vw, 3.7rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--ink-green);
  max-width: 15em;
}

.page-about .about-hero__lede {
  margin: clamp(16px, 2.4vw, 22px) 0 0;
  max-width: 40em;
  font-size: clamp(16px, 1.5vw, 17.5px);
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .about-hero__stamp {
  padding: clamp(20px, 3vw, 28px);
  background: var(--ink-green);
  color: var(--cream);
  border-radius: var(--radius-l) var(--radius-l) var(--radius-l) 6px;
  box-shadow: 0 22px 46px -32px rgba(7, 39, 34, 0.95);
}

.page-about .about-hero__stampno {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold);
  border-bottom: 1px solid rgba(215, 162, 74, 0.35);
  padding-bottom: 10px;
}

.page-about .about-hero__stamplist {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__stamprow {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px solid rgba(246, 239, 226, 0.13);
}

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

.page-about .about-hero__stampnum {
  flex: 0 0 auto;
  min-width: 2.4em;
  font-size: clamp(20px, 2.2vw, 25px);
  font-weight: 700;
  color: var(--gold);
  line-height: 1;
}

.page-about .about-hero__stamplabel {
  font-size: 14.5px;
  line-height: 1.55;
  color: rgba(246, 239, 226, 0.8);
}

/* ---------- 档案双栏 ---------- */
.page-about .about-body {
  padding-top: clamp(28px, 4vw, 52px);
  padding-bottom: clamp(40px, 6vw, 80px);
}

.page-about .archive {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
  align-items: start;
}

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

/* ---------- 章节导航 ---------- */
.page-about .about-rail {
  position: sticky;
  top: calc(var(--header-h) + 8px);
  z-index: 5;
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 6px;
  background: rgba(252, 248, 239, 0.94);
  border: 1px solid var(--about-rule);
  border-radius: var(--radius-m);
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-about .about-rail .chapter-rail__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  flex: 0 0 auto;
  padding: 8px 12px;
  font-size: 13.5px;
  line-height: 1.4;
  color: var(--about-ink-soft);
  text-decoration: none;
  white-space: nowrap;
  border-radius: var(--radius-s);
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.page-about .about-rail .chapter-rail__link:hover {
  color: var(--ink-green);
  background: rgba(215, 162, 74, 0.16);
}

.page-about .about-rail .chapter-rail__link.is-current,
.page-about .about-rail .chapter-rail__link[aria-current="true"] {
  color: var(--coral);
  background: rgba(255, 106, 69, 0.1);
}

.page-about .about-rail__no {
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--gold);
}

.page-about .about-rail .chapter-rail__link.is-current .about-rail__no,
.page-about .about-rail .chapter-rail__link[aria-current="true"] .about-rail__no {
  color: var(--coral);
}

/* ---------- 章节 ---------- */
.page-about .about-sec {
  position: relative;
  padding: clamp(26px, 3.6vw, 42px) 0;
  border-top: 1px solid var(--about-rule);
}

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

.page-about .about-sec__no {
  display: block;
  font-size: clamp(2.4rem, 6.5vw, 4rem);
  font-weight: 700;
  line-height: 0.86;
  letter-spacing: -0.03em;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--gold);
  margin-bottom: 10px;
  user-select: none;
}

@supports not ((-webkit-text-stroke: 1px #000) or (text-stroke: 1px #000)) {
  .page-about .about-sec__no {
    color: var(--gold);
  }
}

.page-about .about-sec__title {
  margin: 0 0 14px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(1.4rem, 3.1vw, 2rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--ink-green);
}

.page-about .about-sec__lead {
  margin: 0 0 16px;
  font-size: clamp(17px, 1.7vw, 18.5px);
  line-height: 1.72;
  font-weight: 500;
  color: var(--brown);
}

.page-about .about-sec p {
  margin: 0 0 14px;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--about-ink-soft);
}

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

.page-about .about-sec a {
  color: var(--moss);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 107, 88, 0.45);
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.page-about .about-sec a:hover {
  color: var(--coral);
  border-bottom-color: var(--coral);
}

/* ---------- 引用块 ---------- */
.page-about .about-quote {
  margin: 22px 0;
  padding: 20px 24px;
  background: rgba(241, 217, 167, 0.34);
  border: 1px solid rgba(215, 162, 74, 0.55);
  border-left: 3px solid var(--gold);
  border-radius: 0 var(--radius-m) var(--radius-m) 0;
}

.page-about .about-quote p {
  margin: 0;
  font-size: 17.5px;
  line-height: 1.7;
  font-weight: 700;
  color: var(--ink-green);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: clamp(18px, 2.6vw, 26px) 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--radius-m);
}

.page-about .about-figure__cap {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: rgba(43, 33, 27, 0.62);
  border-left: 2px solid rgba(215, 162, 74, 0.6);
  padding-left: 10px;
}

.page-about .about-tl-band .about-figure__cap {
  color: rgba(246, 239, 226, 0.62);
}

/* ---------- 深色时间线带 ---------- */
.page-about .about-tl-band {
  margin: clamp(20px, 3vw, 30px) 0;
  padding: clamp(28px, 4.6vw, 50px) clamp(20px, 3.6vw, 40px);
  background: var(--ink-green);
  color: var(--cream);
  border-radius: var(--radius-l);
  clip-path: polygon(0 22px, 100% 0, 100% calc(100% - 22px), 0 100%);
  overflow: hidden;
}

.page-about .about-tl-svg {
  display: block;
  width: 100%;
  height: 26px;
  color: var(--gold);
  opacity: 0.7;
  margin-bottom: 14px;
}

.page-about .about-tl-band__title {
  margin: 0 0 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--gold);
}

.page-about .about-tl {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-tl__item {
  position: relative;
  padding: 0 0 26px 30px;
  border-left: 1px solid rgba(215, 162, 74, 0.35);
}

.page-about .about-tl__item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .about-tl__dot {
  position: absolute;
  left: -6px;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(215, 162, 74, 0.16);
  transition: background-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-about .about-tl__item:hover .about-tl__dot,
.page-about .about-tl__item:focus-within .about-tl__dot {
  background: var(--coral);
  box-shadow: 0 0 0 6px rgba(255, 106, 69, 0.22);
}

.page-about .about-tl__stage {
  display: inline-block;
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--mist);
  margin-bottom: 4px;
}

.page-about .about-tl__name {
  margin: 0 0 6px;
  font-family: var(--font-sans);
  font-size: clamp(16.5px, 1.8vw, 18.5px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--gold-soft);
  transition: color 0.2s var(--ease);
}

.page-about .about-tl__item:hover .about-tl__name {
  color: #ffffff;
}

.page-about .about-tl__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(246, 239, 226, 0.76);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(18px, 2.6vw, 26px);
}

.page-about .about-team__card {
  background: var(--paper);
  border: 1px solid var(--about-rule);
  border-radius: var(--radius-m);
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .about-team__card:hover {
  border-color: rgba(215, 162, 74, 0.7);
  transform: translateY(-3px);
}

.page-about .about-team__det {
  padding: 18px 20px;
}

.page-about .about-team__sum {
  display: flex;
  align-items: baseline;
  gap: 12px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 16.5px;
  color: var(--ink-green);
}

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

.page-about .about-team__sum::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--gold);
  transition: color 0.18s var(--ease);
}

.page-about .about-team__det[open] .about-team__sum::after {
  content: "－";
  color: var(--coral);
}

.page-about .about-team__sum:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 4px;
  border-radius: var(--radius-s);
}

.page-about .about-team__num {
  font-size: 26px;
  line-height: 1;
  color: var(--coral);
  letter-spacing: -0.02em;
}

.page-about .about-team__role {
  line-height: 1.35;
}

.page-about .about-team__body {
  padding-top: 12px;
  margin-top: 12px;
  border-top: 1px dashed rgba(43, 33, 27, 0.16);
}

.page-about .about-team__body p {
  margin: 0 0 10px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--about-ink-soft);
}

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

/* ---------- 流程 ---------- */
.page-about .about-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(18px, 2.6vw, 24px);
}

.page-about .about-flow__block {
  padding: 20px 22px;
  background: var(--paper);
  border: 1px solid var(--about-rule);
  border-top: 3px solid var(--moss);
  border-radius: 0 0 var(--radius-m) var(--radius-m);
}

.page-about .about-flow__title {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink-green);
}

.page-about .about-flow__block p {
  font-size: 14.5px;
  line-height: 1.78;
}

.page-about .about-flow__muted {
  color: rgba(43, 33, 27, 0.55);
  font-size: 13.5px;
}

.page-about .about-slots {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-slots li {
  padding: 5px 13px;
  font-size: 13.5px;
  color: var(--moss);
  background: rgba(47, 107, 88, 0.09);
  border: 1px solid rgba(47, 107, 88, 0.34);
  border-radius: 999px;
}

.page-about .about-steps {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.page-about .about-steps li {
  position: relative;
  padding: 5px 13px;
  font-size: 13.5px;
  font-family: var(--font-mono);
  color: var(--ink-green);
  background: rgba(215, 162, 74, 0.18);
  border: 1px solid rgba(215, 162, 74, 0.55);
  border-radius: var(--radius-s);
}

.page-about .about-steps li + li::before {
  content: "→";
  position: absolute;
  left: -11px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gold);
  font-size: 12px;
}

/* ---------- 生态数字 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: clamp(18px, 2.6vw, 24px) 0;
  padding: 0;
  list-style: none;
}

.page-about .about-stats__item {
  padding: 16px 16px 14px;
  background: var(--paper);
  border: 1px solid var(--about-rule);
  border-radius: var(--radius-m);
}

.page-about .about-stats__num {
  display: block;
  font-size: clamp(26px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ink-green);
}

.page-about .about-stats__num em {
  font-style: normal;
  color: var(--coral);
}

.page-about .about-stats__label {
  display: block;
  margin-top: 7px;
  font-size: 13px;
  line-height: 1.5;
  color: rgba(43, 33, 27, 0.62);
}

/* ---------- 联系区块 ---------- */
.page-about .about-mail {
  font-size: 15px;
  color: var(--ink-green);
  background: rgba(215, 162, 74, 0.22);
  padding: 1px 6px;
  border-radius: var(--radius-s);
  word-break: break-all;
}

.page-about .about-links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin: 22px 0 18px;
}

.page-about .about-links__item {
  display: block;
  padding: 15px 18px;
  text-decoration: none;
  background: var(--ink-green);
  color: var(--cream);
  border-radius: var(--radius-m);
  border: 1px solid transparent;
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-about .about-links__item:hover {
  transform: translateY(-3px);
  border-color: var(--coral);
  background: var(--ink-deep);
}

.page-about .about-links__label {
  display: block;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--gold-soft);
}

.page-about .about-links__item:hover .about-links__label {
  color: #ffffff;
}

.page-about .about-links__sub {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(246, 239, 226, 0.68);
}

.page-about .about-note {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(43, 33, 27, 0.6);
  padding-top: 14px;
  border-top: 1px solid var(--about-rule-soft);
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .about-team {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 820px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

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

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

@media (min-width: 980px) {
  .page-about .archive {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: clamp(34px, 4.5vw, 64px);
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 40px);
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    overflow: visible;
    padding: 4px 0 4px 16px;
    background: transparent;
    border: 0;
    border-left: 2px solid var(--about-rule);
    border-radius: 0;
  }

  .page-about .about-rail .chapter-rail__link {
    white-space: normal;
    padding: 9px 10px;
    font-size: 14px;
  }

  .page-about .about-rail .chapter-rail__link.is-current::before,
  .page-about .about-rail .chapter-rail__link[aria-current="true"]::before {
    content: "";
    position: absolute;
    left: -18px;
    top: 7px;
    bottom: 7px;
    width: 2px;
    background: var(--coral);
    border-radius: 2px;
  }

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

  .page-about .about-tl {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(24px, 4vw, 48px);
    row-gap: 0;
  }

  .page-about .about-tl__item:nth-child(odd) {
    padding-right: 8px;
  }

  .page-about .about-tl__item:nth-last-child(2) {
    border-left-color: transparent;
  }
}

@media (min-width: 1180px) {
  .page-about .archive {
    grid-template-columns: 232px minmax(0, 1fr);
  }

  .page-about .about-rail .chapter-rail__link {
    font-size: 14.5px;
  }
}

@media (max-width: 400px) {
  .page-about .about-tl-band {
    padding-left: 16px;
    padding-right: 16px;
    clip-path: polygon(0 14px, 100% 0, 100% calc(100% - 14px), 0 100%);
  }

  .page-about .about-team__det {
    padding: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team__card,
  .page-about .about-links__item,
  .page-about .about-tl__dot,
  .page-about .about-tl__name {
    transition: none;
  }

  .page-about .about-team__card:hover,
  .page-about .about-links__item:hover {
    transform: none;
  }
}