.page-about {
  --about-soft: var(--warm-gray);
  --about-rule: var(--gold-line);
  background-color: var(--paper);
  color: var(--charcoal);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  padding-bottom: 72px;
  overflow-x: hidden;
}

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

.page-about a {
  color: inherit;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding: 28px 0 4px;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-hero__eyebrow {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--vermilion);
  text-transform: uppercase;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(32px, 7.4vw, 64px);
  line-height: 1.12;
  color: var(--ink-green);
  letter-spacing: -0.01em;
}

.page-about .about-hero__lead {
  margin: 20px 0 0;
  max-width: 40em;
  font-size: 16.5px;
  color: #39342c;
}

.page-about .about-figs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 28px 0 0;
  padding: 0;
  border-right: 1px solid var(--about-rule);
  border-bottom: 1px solid var(--about-rule);
  background-color: var(--cream-card);
}

.page-about .about-fig {
  margin: 0;
  padding: 14px 16px;
  border-top: 1px solid var(--about-rule);
  border-left: 1px solid var(--about-rule);
}

.page-about .about-fig__label {
  margin: 0 0 4px;
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--about-soft);
}

.page-about .about-fig__num {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--ink-green);
}

.page-about .about-fig__num span {
  font-size: 15px;
  color: var(--amber-dark);
}

/* ---------- 双栏骨架 ---------- */

.page-about .about-body {
  display: grid;
  gap: 32px;
  margin-top: 34px;
}

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

/* ---------- 章节索引 ---------- */

.page-about .about-rail {
  background-color: var(--cream-card);
  border: 1px solid var(--about-rule);
  padding: 16px 14px;
}

.page-about .about-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--amber-dark);
  text-transform: uppercase;
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about .about-rail__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  box-sizing: border-box;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid transparent;
  text-decoration: none;
  font-size: 14px;
  color: var(--ink-green);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  border-color: var(--amber);
  background-color: var(--paper);
  outline: none;
}

.page-about .about-rail__no {
  font-size: 12px;
  color: var(--vermilion);
}

/* ---------- 章节 ---------- */

.page-about .about-sec {
  padding-top: 44px;
  margin-top: 44px;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-sec:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.page-about .about-sec__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 16px;
}

.page-about .about-sec__no {
  flex: none;
  font-size: clamp(26px, 5vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: var(--vermilion);
}

.page-about .about-sec__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 4.6vw, 38px);
  line-height: 1.22;
  font-weight: 700;
  color: var(--ink-green);
}

.page-about .about-sec__body {
  max-width: 42em;
}

.page-about .about-sec__body p {
  margin: 0 0 16px;
}

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

/* ---------- 图片 ---------- */

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

.page-about .about-figure__frame {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: 1px solid var(--about-rule);
  background-color: var(--cream-card);
}

.page-about .about-figure__frame--wide {
  aspect-ratio: 3 / 2;
}

.page-about .about-figure__frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-figure .caption {
  margin-top: 10px;
  font-size: 13.5px;
  color: var(--about-soft);
}

/* ---------- 整理工序 ---------- */

.page-about .about-steps {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background-color: var(--about-rule);
  border: 1px solid var(--about-rule);
}

.page-about .about-step {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  background-color: var(--paper);
  transition: background-color var(--dur) var(--ease);
}

.page-about .about-step:hover {
  background-color: var(--cream-card);
}

.page-about .about-step__no {
  flex: none;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  font-size: 13px;
  color: var(--paper);
  background-color: var(--ink-green);
}

.page-about .about-step__text {
  font-size: 15px;
  line-height: 1.65;
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-member {
  background-color: var(--cream-card);
  border: 1px solid var(--about-rule);
}

.page-about .about-member .drawer__head {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-member .drawer__num {
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--vermilion);
}

.page-about .about-member__role {
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--ink-green);
}

.page-about .about-member .drawer__body {
  padding: 0 16px 16px;
  border-top: 1px solid var(--about-rule);
  margin-top: 2px;
}

.page-about .about-member .drawer__body p {
  margin: 12px 0 0;
  font-size: 15px;
  color: #38332b;
}

.page-about .about-member[open] {
  border-color: var(--amber);
}

/* ---------- 价值理念 ---------- */

.page-about .about-values {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin-top: 8px;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-value {
  padding: 20px 0;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-value__no {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--amber-dark);
}

.page-about .about-value__title {
  margin: 6px 0 8px;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
  color: var(--ink-green);
}

.page-about .about-value__text {
  margin: 0;
  max-width: 34em;
  font-size: 15.5px;
  color: #3b362e;
}

/* ---------- 时间线 ---------- */

.page-about .about-tl-wrap {
  margin-top: 26px;
  border: 1px solid var(--about-rule);
  background-color: var(--cream-card);
}

.page-about .about-tl {
  display: block;
  width: 100%;
  height: auto;
  padding: 10px 8px 0;
  box-sizing: border-box;
}

.page-about .about-tl__axis {
  stroke: var(--gold-old);
  stroke-width: 2;
}

.page-about .about-tl__dot {
  fill: var(--paper);
  stroke: var(--gold-old);
  stroke-width: 3;
  transition: fill var(--dur) var(--ease);
}

.page-about .about-tl__node:hover .about-tl__dot {
  fill: var(--amber);
}

.page-about .about-tl__dot--now {
  fill: var(--vermilion);
  stroke: var(--vermilion);
}

.page-about .about-tl__label {
  font-family: var(--font-display);
  font-size: 13px;
  fill: var(--ink-green);
  text-anchor: middle;
}

.page-about .about-tl__label--now {
  fill: var(--vermilion);
}

.page-about .about-tl__meta {
  font-family: var(--font-mono);
  font-size: 11.5px;
  fill: var(--warm-gray);
  text-anchor: middle;
}

.page-about .about-tl__meta--now {
  fill: var(--vermilion);
}

.page-about .about-tl__list {
  list-style: none;
  margin: 0;
  padding: 0 16px 16px;
  display: grid;
  gap: 14px;
}

.page-about .about-tl__item {
  padding-top: 14px;
  border-top: 1px dashed var(--about-rule);
}

.page-about .about-tl__item p {
  margin: 8px 0 0;
  font-size: 15px;
  color: #3b362e;
}

.page-about .about-tl__item--now {
  background-color: var(--paper);
  margin: 0 -16px;
  padding: 14px 16px 14px;
  border-top: 1px solid var(--amber);
}

/* ---------- 合作生态 ---------- */

.page-about .about-partners {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 22px;
}

.page-about .about-partner {
  padding: 16px 18px;
  background-color: var(--paper);
  border: 1px solid var(--about-rule);
  border-left: 3px solid var(--gold-old);
  transition: border-left-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .about-partner:hover {
  border-left-color: var(--vermilion);
  background-color: var(--cream-card);
}

.page-about .about-partner__no {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--warm-gray);
}

.page-about .about-partner__title {
  margin: 6px 0 6px;
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--ink-green);
}

.page-about .about-partner__text {
  margin: 0;
  font-size: 14.5px;
  color: #3b362e;
}

/* ---------- 结尾 ---------- */

.page-about .about-next {
  margin-top: 48px;
  background-color: var(--ink-green);
  border: 1px solid var(--ink-green-deep);
}

.page-about .about-next__inner {
  padding: 28px 20px;
}

.page-about .about-next .plaque__no {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--amber);
}

.page-about .about-next__title {
  margin: 10px 0 12px;
  font-family: var(--font-display);
  font-size: clamp(20px, 4.4vw, 30px);
  line-height: 1.3;
  color: var(--paper);
}

.page-about .about-next__text {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  color: #d8d2c4;
}

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

.page-about .about-next__actions .btn--line {
  color: var(--paper);
  border-color: var(--gold-old);
}

.page-about .about-next__actions .btn--line:hover,
.page-about .about-next__actions .btn--line:focus-visible {
  border-color: var(--amber);
  background-color: var(--amber-dark);
  color: var(--paper);
}

/* ---------- 桌面 ---------- */

@media (min-width: 700px) {
  .page-about .about-figs {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-step {
    flex-direction: column;
    gap: 10px;
  }

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

  .page-about .about-values {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 28px;
  }

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

  .page-about .about-next__inner {
    padding: 36px 32px;
  }
}

@media (min-width: 920px) {
  .page-about {
    padding-bottom: 96px;
  }

  .page-about .about-hero {
    padding-top: 40px;
  }

  .page-about .about-fig__num {
    font-size: 26px;
  }

  .page-about .about-body {
    grid-template-columns: 252px minmax(0, 1fr);
    gap: 56px;
    margin-top: 46px;
  }

  .page-about .about-rail {
    position: sticky;
    top: 92px;
    padding: 20px 18px;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
  }

  .page-about .about-rail__link {
    width: 100%;
  }

  .page-about .about-sec {
    padding-top: 56px;
    margin-top: 56px;
  }

  .page-about .about-tl__list {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0;
    padding: 0 16px 18px;
  }

  .page-about .about-tl__item {
    padding: 14px 12px 0;
    border-top: 1px solid var(--about-rule);
  }

  .page-about .about-tl__item--now {
    margin: 0;
    padding: 14px 12px 0;
  }
}
<<<END>>>