.page-about {
  --about-text: 660px;
  --about-line: rgba(201, 162, 39, .30);
  --about-hair: rgba(140, 131, 122, .22);
  padding-bottom: 72px;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding-top: 26px;
  padding-bottom: 4px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 22px 0 40px;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 96px;
  height: 6px;
  background-image: radial-gradient(circle, rgba(201, 162, 39, .8) 1.5px, transparent 1.6px);
  background-size: 12px 6px;
  background-position: 0 0;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 30px;
  line-height: 1.24;
  letter-spacing: .02em;
  color: var(--porcelain);
}

.page-about .about-hero .lead {
  margin-top: 18px;
  max-width: var(--about-text);
  font-size: 16px;
  line-height: 1.85;
  color: #DAD3C8;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__panel {
  border-top: 2px solid var(--red);
  padding: 20px 18px 18px;
}

.page-about .about-hero__cap {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--stone);
}

.page-about .about-facts {
  margin: 0;
}

.page-about .about-facts__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px dashed var(--about-hair);
}

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

.page-about .about-facts dt {
  font-size: 13px;
  color: var(--stone);
}

.page-about .about-facts dd {
  margin: 0;
  font-size: 13px;
  color: var(--gold-light);
}

.page-about .about-hero__stamp {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid rgba(46, 143, 130, .35);
  font-size: 12px;
  line-height: 1.7;
  color: var(--jade-light);
}

/* ---------- 主体栅格 ---------- */
.page-about .about-body {
  padding-top: 8px;
}

.page-about .about-body__grid {
  display: grid;
  gap: 8px;
}

/* ---------- 章节 ---------- */
.page-about .about-sec {
  position: relative;
  padding: 46px 0 40px;
  border-top: 1px solid var(--about-line);
}

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

.page-about .about-sec::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 84px;
  height: 6px;
  background-image: radial-gradient(circle, rgba(201, 162, 39, .85) 1.5px, transparent 1.6px);
  background-size: 12px 6px;
}

.page-about .about-sec__title {
  margin: 12px 0 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 27px;
  line-height: 1.25;
  letter-spacing: .02em;
  color: var(--porcelain);
}

.page-about .about-sec__claim {
  margin: 14px 0 22px;
  max-width: var(--about-text);
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 18px;
  line-height: 1.7;
  color: var(--gold-light);
  padding-left: 14px;
  border-left: 2px solid var(--red);
}

.page-about .about-sec p {
  max-width: var(--about-text);
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.85;
  color: #D8D1C6;
}

.page-about .about-link {
  color: var(--jade-light);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 166, 149, .5);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--gold-light);
  border-bottom-color: var(--gold-light);
}

/* ---------- 引用块 ---------- */
.page-about .about-quote {
  margin: 28px 0 0;
  max-width: var(--about-text);
  padding: 22px 22px 22px 24px;
  background: linear-gradient(100deg, var(--red-deep) 0%, rgba(78, 15, 25, .55) 100%);
  border-left: 3px solid var(--gold);
}

.page-about .about-quote p {
  margin: 0;
  max-width: none;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 19px;
  line-height: 1.65;
  color: var(--porcelain);
}

/* ---------- 图片 ---------- */
.page-about .figure {
  margin: 0;
}

.page-about .figure__frame {
  overflow: hidden;
  border: 1px solid var(--about-line);
  background: var(--ink-2);
}

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

.page-about .figure__cap {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--stone);
}

.page-about .about-sec__figure {
  margin-top: 26px;
}

.page-about .about-team-figure,
.page-about .about-timeline-figure {
  margin: 22px 0 26px;
}

/* ---------- 双线对照 ---------- */
.page-about .about-fork {
  margin: 24px 0 24px;
  padding: 18px 14px 10px;
  border: 1px solid var(--about-hair);
  background: var(--ink-2);
}

.page-about .about-fork__svg {
  display: block;
  width: 100%;
  max-width: 460px;
  height: auto;
  margin: 0 auto;
}

.page-about .about-fork__trunk {
  fill: none;
  stroke: rgba(201, 162, 39, .6);
  stroke-width: 2;
}

.page-about .about-fork__branch {
  transition: opacity .28s ease;
}

.page-about .about-fork__branch--cn path {
  fill: none;
  stroke: var(--red-lit);
  stroke-width: 2.5;
}

.page-about .about-fork__branch--cn text {
  fill: var(--porcelain);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
}

.page-about .about-fork__branch--cn2 path {
  fill: none;
  stroke: var(--gold);
  stroke-width: 2;
}

.page-about .about-fork__branch--cn2 text {
  fill: var(--gold-light);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
}

.page-about .about-fork__label {
  fill: var(--stone);
  font-family: var(--font-sans);
  font-size: 12px;
}

.page-about .about-fork:hover .about-fork__branch {
  opacity: .26;
}

.page-about .about-fork .about-fork__branch:hover,
.page-about .about-fork .about-fork__branch:focus-within {
  opacity: 1;
}

.page-about .about-diff {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-diff__row {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 4px 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-diff__no {
  grid-row: 1 / 3;
  font-size: 12px;
  color: var(--gold);
  letter-spacing: .08em;
}

.page-about .about-diff__name {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 16px;
  color: var(--porcelain);
}

.page-about .about-diff__text {
  font-size: 14px;
  line-height: 1.8;
  color: #C6BFB4;
}

/* ---------- 团队角色 ---------- */
.page-about .about-roles {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.page-about .about-role {
  padding: 20px 18px;
  border-top: 2px solid var(--red);
}

.page-about .about-role .card__label {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--stone);
}

.page-about .about-role .card__title {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 19px;
  color: var(--gold-light);
}

.page-about .about-role .card__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: #C6BFB4;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 8px 0 0;
  padding: 0 0 0 24px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 26px;
  width: 1px;
  background: linear-gradient(180deg, rgba(201, 162, 39, .7), rgba(140, 29, 44, .5));
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 24px;
}

.page-about .about-timeline__year {
  display: block;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--gold);
}

.page-about .about-timeline__dot {
  position: absolute;
  left: -24px;
  top: 5px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--red);
  border: 2px solid var(--gold);
}

.page-about .about-timeline__text {
  margin: 6px 0 0;
  max-width: var(--about-text);
  font-size: 14.5px;
  line-height: 1.8;
  color: #C6BFB4;
}

.page-about .about-timeline__foot {
  margin-top: 4px;
  font-size: 13.5px;
  color: var(--stone);
}

/* ---------- 共创 ---------- */
.page-about .about-coop {
  margin-top: 6px;
  border-top: 1px solid var(--about-hair);
}

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

.page-about .about-coop__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 4px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 17px;
  color: var(--porcelain);
}

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

.page-about .about-coop__head::before {
  content: "＋";
  margin-right: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--gold);
}

.page-about .about-coop__item[open] .about-coop__head::before {
  content: "－";
}

.page-about .about-coop__name {
  flex: 1 1 auto;
}

.page-about .about-coop__hint {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--jade-light);
}

.page-about .about-coop__head:hover,
.page-about .about-coop__head:focus-visible {
  color: var(--gold-light);
}

.page-about .about-coop__body {
  padding: 0 4px 20px 24px;
}

.page-about .about-coop__body p {
  margin: 0;
  max-width: var(--about-text);
  font-size: 14.5px;
  line-height: 1.85;
  color: #C6BFB4;
}

/* ---------- 支持清单 ---------- */
.page-about .about-support {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
}

.page-about .about-support__row {
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 4px 12px;
  padding: 16px 0;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-support__no {
  grid-row: 1 / 3;
  font-size: 12px;
  color: var(--jade-light);
  letter-spacing: .08em;
}

.page-about .about-support__title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 17px;
  color: var(--porcelain);
}

.page-about .about-support__text {
  font-size: 14.5px;
  line-height: 1.8;
  color: #C6BFB4;
}

.page-about .about-cta {
  margin-top: 30px;
  padding: 24px 20px;
  background: linear-gradient(120deg, rgba(78, 15, 25, .9), rgba(16, 14, 13, .9));
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--gold);
}

.page-about .about-cta__text {
  margin: 0 0 18px;
  max-width: 560px;
  font-size: 15px;
  line-height: 1.8;
  color: #E2DCD2;
}

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

/* ---------- 右侧索引 ---------- */
.page-about .about-rail {
  padding: 26px 0 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-rail .rail__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--stone);
}

.page-about .about-rail .rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px 14px;
}

.page-about .about-rail .rail__item a {
  display: flex;
  gap: 8px;
  align-items: baseline;
  padding: 6px 0 6px 8px;
  border-left: 2px solid transparent;
  font-size: 14px;
  color: var(--stone);
  text-decoration: none;
}

.page-about .about-rail .rail__item a:hover,
.page-about .about-rail .rail__item a:focus-visible {
  color: var(--gold-light);
  border-left-color: var(--gold);
}

.page-about .about-rail .rail__item a.is-current {
  color: var(--porcelain);
  border-left-color: var(--red);
}

.page-about .about-rail__no {
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--gold);
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero {
    padding-top: 34px;
  }

  .page-about .about-hero h1 {
    font-size: 40px;
  }

  .page-about .about-sec__title {
    font-size: 32px;
  }

  .page-about .about-sec__claim {
    font-size: 20px;
  }

  .page-about .about-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-diff__row,
  .page-about .about-support__row {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 4px 16px;
  }

  .page-about .about-timeline {
    padding-left: 0;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px 22px;
  }

  .page-about .about-timeline::before {
    display: none;
  }

  .page-about .about-timeline__item {
    padding: 0;
    border-top: 1px solid var(--about-line);
    padding-top: 14px;
  }

  .page-about .about-timeline__dot {
    position: static;
    display: block;
    width: 10px;
    height: 10px;
    margin: 0 0 12px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1000px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-hero h1 {
    font-size: 46px;
    line-height: 1.2;
  }

  .page-about .about-body__grid {
    grid-template-columns: minmax(0, 1fr) 224px;
    gap: 60px;
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--beam-h) + 30px);
    padding-top: 54px;
    border-top: 0;
    border-left: 1px solid var(--about-hair);
    padding-left: 20px;
  }

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

  .page-about .about-sec {
    padding: 60px 0 52px;
  }

  .page-about .about-sec--split {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 268px;
    gap: 48px;
    align-items: start;
  }

  .page-about .about-sec--split .about-sec__figure {
    margin-top: 46px;
  }

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

  .page-about .about-timeline {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 0 20px;
  }

  .page-about .about-timeline__text {
    font-size: 13.5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-fork__branch {
    transition: none;
  }
}
</final>
</result>