.page-about {
  background: var(--paper);
  color: var(--ink);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-top: 3px solid var(--gold);
  color: var(--paper-2);
  background:
    radial-gradient(115% 85% at 88% -10%, rgba(18, 184, 166, .22), transparent 62%),
    linear-gradient(165deg, var(--forest-900) 0%, var(--forest-800) 55%, var(--forest-700) 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, rgba(247, 241, 227, .08) 0 1px, transparent 1px 44px),
    repeating-linear-gradient(90deg, rgba(247, 241, 227, .08) 0 1px, transparent 1px 44px);
}

.page-about .about-hero__inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(26px, 5vw, 56px) var(--gutter) clamp(34px, 6vw, 72px);
  display: grid;
  gap: clamp(26px, 4vw, 46px);
}

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

.page-about .about-hero__crumbs,
.page-about .about-hero__crumbs a {
  color: rgba(247, 241, 227, .72);
}

.page-about .about-hero__crumbs {
  margin-bottom: 18px;
}

.page-about .about-hero__eyebrow {
  color: var(--gold-soft);
  margin: 0 0 10px;
}

.page-about .about-hero h1 {
  margin: 0 0 16px;
  font-family: var(--f-head);
  font-weight: 800;
  font-size: clamp(29px, 6vw, 52px);
  line-height: 1.12;
  letter-spacing: -.02em;
  color: var(--paper-2);
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 48ch;
  font-size: clamp(14.5px, 2vw, 16.5px);
  line-height: 1.85;
  color: rgba(247, 241, 227, .82);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 22px 0 0;
  padding: 16px 0 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  border-top: 1px dashed rgba(247, 241, 227, .26);
}

.page-about .about-hero__num {
  display: block;
  font-family: var(--f-mono);
  font-size: clamp(22px, 4vw, 30px);
  font-weight: 600;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-hero__label {
  display: block;
  margin-top: 7px;
  font-size: 11.5px;
  letter-spacing: .06em;
  color: rgba(247, 241, 227, .68);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.page-about .about-hero__figure {
  margin: 0;
  padding: 10px;
  background: var(--paper-2);
  border: 1px solid rgba(247, 241, 227, .32);
  transform: rotate(-1.2deg);
  box-shadow:
    0 0 0 1px rgba(247, 241, 227, .18),
    12px 14px 0 -3px rgba(247, 241, 227, .14),
    0 32px 60px -32px rgba(0, 0, 0, .72);
}

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

.page-about .about-hero__figure figcaption {
  padding: 9px 4px 3px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .05em;
  color: var(--muted);
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: center;
  }
}

/* ---------- 主体两栏 ---------- */
.page-about .about-wrap {
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(30px, 5vw, 60px) var(--gutter) clamp(48px, 7vw, 92px);
  display: grid;
  gap: clamp(24px, 4vw, 52px);
}

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

.page-about .about-rail__title {
  margin: 0 0 10px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--muted);
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
}

.page-about .about-rail__list li {
  flex: 0 0 auto;
}

.page-about .about-rail__list a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 11px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-2);
  color: var(--ink);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-rail__list a:hover,
.page-about .about-rail__list a:focus-visible {
  border-color: var(--gold);
  color: var(--forest-700);
}

.page-about .about-rail__n {
  font-family: var(--f-mono);
  font-size: 11px;
  color: var(--gold);
}

.page-about .about-rail__foot {
  display: none;
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--line-2);
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--muted);
}

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

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

@media (min-width: 960px) {
  .page-about .about-wrap {
    grid-template-columns: 224px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-about .about-rail__list {
    display: grid;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-rail__list a {
    border: none;
    border-left: 2px solid transparent;
    border-radius: 0;
    background: transparent;
    padding: 9px 10px;
    white-space: normal;
    line-height: 1.5;
  }

  .page-about .about-rail__list a:hover,
  .page-about .about-rail__list a:focus-visible {
    border-left-color: var(--gold);
    background: var(--paper-2);
  }

  .page-about .about-rail__foot {
    display: block;
  }

  .page-about .about-rail__cta {
    display: block;
    margin-top: 12px;
    text-align: center;
  }
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  scroll-margin-top: 100px;
}

.page-about .about-sec + .about-sec {
  margin-top: clamp(30px, 5vw, 54px);
  padding-top: clamp(26px, 4vw, 42px);
  border-top: 1px dashed var(--line-2);
}

.page-about .about-sec__head {
  margin-bottom: 14px;
}

.page-about .about-sec__head .bp-eyebrow {
  margin: 0;
}

.page-about .about-sec h2 {
  margin: 8px 0 0;
  font-family: var(--f-head);
  font-weight: 800;
  font-size: clamp(21px, 3.6vw, 31px);
  line-height: 1.28;
  letter-spacing: -.01em;
  color: var(--forest-900);
}

.page-about .about-sec p {
  margin: 0 0 13px;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

.page-about .about-sec__lede {
  color: var(--forest-700);
}

/* ---------- 起点要点 ---------- */
.page-about .about-points {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-points li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 12px 14px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold-soft);
  box-shadow: var(--shadow-1);
}

.page-about .about-points__n {
  font-family: var(--f-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--gold);
}

.page-about .about-points__t {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink);
}

.page-about .about-points__t strong {
  color: var(--forest-900);
}

/* ---------- 四层结构 ---------- */
.page-about .about-layers {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-layer {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 0 clamp(10px, 2vw, 18px);
  padding: 17px clamp(14px, 2.5vw, 22px) 17px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-top: 3px solid var(--forest-700);
  box-shadow: var(--shadow-1);
  transition: transform var(--dur) var(--ease), border-top-color var(--dur) var(--ease);
}

.page-about .about-layer:hover {
  transform: translateY(-2px);
  border-top-color: var(--gold);
}

.page-about .about-layer__n {
  font-family: var(--f-mono);
  font-size: 21px;
  font-weight: 600;
  line-height: 1.15;
  color: var(--gold);
}

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

.page-about .about-layer h3 {
  margin: 0 0 7px;
  font-family: var(--f-head);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--forest-900);
}

.page-about .about-layer p {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink);
}

.page-about .about-layer__link {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--forest-700);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
  padding-bottom: 1px;
}

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

@media (min-width: 760px) {
  .page-about .about-layer:nth-child(even) {
    margin-left: clamp(0px, 3vw, 30px);
  }
}

/* ---------- 更新节奏 ---------- */
.page-about .about-cadence {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-cadence li {
  display: grid;
  grid-template-columns: minmax(92px, auto) minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 11px 2px;
  border-bottom: 1px solid var(--line);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink);
}

.page-about .about-cadence__k {
  font-family: var(--f-mono);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--forest-700);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 18px;
  margin-top: 24px;
}

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

.page-about .about-role {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-about .about-role + .about-role {
  margin-top: 8px;
}

.page-about .about-role[open] {
  border-color: var(--line-2);
  box-shadow: var(--shadow-1);
}

.page-about .about-role__sum {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  list-style: none;
  cursor: pointer;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--forest-900);
}

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

.page-about .about-role__sum::after {
  content: "+";
  font-family: var(--f-mono);
  font-size: 15px;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-role[open] .about-role__sum::after {
  content: "–";
}

.page-about .about-role__count {
  margin-left: auto;
  padding: 2px 7px;
  border-radius: 2px;
  background: rgba(233, 162, 59, .18);
  font-family: var(--f-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--forest-700);
}

.page-about .about-role .about-role__text {
  margin: 0;
  padding: 12px 14px 14px;
  border-top: 1px dashed var(--line);
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--muted);
  max-width: none;
}

.page-about .about-team__figure {
  margin: 0;
  padding: 8px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-1);
}

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

.page-about .about-team__figure figcaption {
  padding: 9px 4px 2px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .05em;
  color: var(--muted);
}

@media (min-width: 820px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    align-items: start;
  }
}

/* ---------- 里程碑 ---------- */
.page-about .about-miles {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-mile {
  position: relative;
  padding: 0 0 20px 26px;
  border-left: 1px dashed var(--line-2);
  transition: transform var(--dur) var(--ease);
}

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

.page-about .about-mile::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 5px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--gold);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-mile .about-mile__year {
  margin: 0 0 4px;
  font-family: var(--f-mono);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  color: var(--forest-700);
}

.page-about .about-mile .about-mile__title {
  margin: 0 0 4px;
  font-family: var(--f-head);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--forest-900);
}

.page-about .about-mile .about-mile__text {
  margin: 0;
  max-width: none;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-miles__figure {
  margin: 24px 0 0;
  padding: 8px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-1);
}

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

.page-about .about-miles__figure figcaption {
  padding: 9px 4px 2px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .05em;
  color: var(--muted);
}

@media (min-width: 860px) {
  .page-about .about-miles {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .about-mile {
    padding: 20px 4px 0;
    border-left: none;
    border-top: 1px dashed var(--line-2);
  }

  .page-about .about-mile:last-child {
    border-top-color: var(--line-2);
  }

  .page-about .about-mile::before {
    left: 0;
    top: -5px;
  }

  .page-about .about-mile:hover {
    transform: translateY(-3px);
  }

  .page-about .about-mile:hover::before {
    background: var(--gold);
    border-color: var(--coral);
  }

  .page-about .about-mile:hover .about-mile__year {
    color: var(--coral);
  }

  .page-about .about-mile .about-mile__title {
    font-size: 14.5px;
  }
}

/* ---------- 合作生态 ---------- */
.page-about .about-tiers {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.page-about .about-tier {
  padding: 18px 16px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-1);
}

.page-about .about-tier--direct {
  border-top: 3px solid var(--gold);
}

.page-about .about-tier--book {
  border-top: 3px solid var(--forest-700);
}

.page-about .about-tier--relay {
  border-top: 3px solid var(--indigo);
}

.page-about .about-tier h3 {
  margin: 10px 0 7px;
  font-family: var(--f-head);
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--forest-900);
}

.page-about .about-tier p {
  margin: 0;
  max-width: none;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--ink);
}

.page-about .about-checks {
  margin-top: 22px;
  padding: 18px clamp(14px, 2.5vw, 22px);
  background: rgba(23, 89, 75, .06);
  border: 1px dashed var(--line-2);
}

.page-about .about-checks h3 {
  margin: 0 0 12px;
  font-family: var(--f-head);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .03em;
  color: var(--forest-900);
}

.page-about .about-checks ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
}

.page-about .about-checks li {
  display: flex;
  gap: 8px;
  align-items: baseline;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--ink);
}

.page-about .about-checks li::before {
  content: "▸";
  font-size: 11px;
  color: var(--coral);
}

@media (min-width: 760px) {
  .page-about .about-tiers {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .about-tier--book {
    margin-top: 16px;
  }

  .page-about .about-tier--relay {
    margin-top: 32px;
  }
}

/* ---------- 运营与备案 ---------- */
.page-about .about-op {
  display: grid;
  gap: 14px;
  margin-top: 20px;
}

.page-about .about-op__main {
  padding: clamp(16px, 3vw, 24px);
  background: var(--paper-2);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-1);
}

.page-about .about-op__meta {
  margin: 0;
  display: grid;
}

.page-about .about-op__meta > div {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-op__meta dt {
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: .05em;
  color: var(--muted);
}

.page-about .about-op__meta dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.page-about .about-op__meta a {
  color: var(--forest-700);
  text-decoration: none;
  border-bottom: 1px solid var(--gold-soft);
}

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

.page-about .about-op__note {
  margin: 14px 0 0;
  max-width: none;
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-op__stamp {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 10px;
  padding: clamp(16px, 3vw, 24px);
  background: linear-gradient(155deg, var(--forest-900), var(--forest-700));
  color: var(--paper-2);
  box-shadow: inset 0 0 0 1px rgba(247, 241, 227, .22);
}

.page-about .about-op__stamp-k {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--gold-soft);
}

.page-about .about-op__stamp-v {
  font-family: var(--f-mono);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--paper-2);
  overflow-wrap: anywhere;
}

.page-about .about-op__stamp-t {
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(247, 241, 227, .76);
}

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

@media (min-width: 820px) {
  .page-about .about-op {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .6fr);
    align-items: stretch;
  }
}

/* ---------- 无障碍与动效降级 ---------- */
.page-about a:focus-visible,
.page-about summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition: none !important;
    transform: none !important;
  }
}
<<<END>>>