.page-about {
  --about-edge: rgba(22, 26, 24, 0.14);
  --about-edge-soft: rgba(22, 26, 24, 0.08);
  background: var(--c-cream);
  color: var(--c-ink);
  overflow-x: hidden;
}

/* 面包屑 */
.page-about .about-crumbs {
  padding-top: 22px;
}
.page-about .about-crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5em;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-stone);
}
.page-about .about-crumbs li + li::before {
  content: "/";
  margin-right: 0.5em;
  color: var(--c-stone);
}
.page-about .about-crumbs a {
  color: var(--c-grass);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.page-about .about-crumbs a:hover,
.page-about .about-crumbs a:focus-visible {
  border-bottom-color: currentColor;
}

/* 首屏 */
.page-about .about-masthead {
  padding: clamp(22px, 4vw, 44px) 0 0;
}
.page-about .about-masthead__inner {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  align-items: start;
}
.page-about .about-masthead h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 6.6vw, 76px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 14px 0 22px;
  max-width: 14ch;
  text-wrap: balance;
}
.page-about .about-masthead .lede {
  max-width: 46ch;
  margin: 0;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.85;
  color: #2b302d;
}
.page-about .about-masthead__aside {
  background: var(--c-paper);
  border: 1px solid var(--about-edge);
  box-shadow: var(--paper-shadow);
  padding: 18px 20px 10px;
}
.page-about .about-aside__label {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--c-stone);
}
.page-about .about-facts {
  margin: 0;
}
.page-about .about-facts__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px dashed var(--about-edge);
}
.page-about .about-facts__row:last-child {
  border-bottom: 0;
}
.page-about .about-facts dt {
  font-size: 13px;
  color: var(--c-stone);
}
.page-about .about-facts dd {
  margin: 0;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.02em;
}

/* 数据带 */
.page-about .about-strip {
  list-style: none;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 24px clamp(16px, 3vw, 34px);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 14px;
  background: var(--c-night);
  color: var(--c-paper);
  clip-path: polygon(0 12px, 100% 0, 100% 100%, 0 calc(100% - 12px));
}
.page-about .about-strip__num {
  display: block;
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1;
  font-weight: 700;
  color: var(--c-lime);
}
.page-about .about-strip__key {
  display: block;
  margin-top: 7px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(255, 253, 247, 0.74);
}

/* 章节骨架 */
.page-about .about-chapter {
  padding: clamp(46px, 7vw, 92px) 0 0;
}
.page-about .about-chapter h2 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.3;
  letter-spacing: 0.01em;
  margin: 10px 0 18px;
}
.page-about .about-chapter h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.4;
  margin: 0 0 8px;
}
.page-about .about-chapter__h2 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.3;
  margin: 10px 0 26px;
}
.page-about .about-split {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
}
.page-about .about-text p {
  margin: 0 0 1em;
  font-size: 16px;
  line-height: 1.85;
  max-width: 42em;
}
.page-about .about-text p:last-child {
  margin-bottom: 0;
}
.page-about .about-side {
  display: grid;
  gap: 16px;
  align-content: start;
}
.page-about .about-note {
  margin: 0;
  padding: 2px 0 2px 14px;
  border-left: 3px solid var(--c-orange);
  font-size: 13px;
  line-height: 1.8;
  color: var(--c-stone);
}
.page-about .about-inline-link {
  color: var(--c-grass);
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  border-bottom: 1px solid currentColor;
}
.page-about .about-inline-link:hover {
  color: var(--c-orange);
}

/* 图片 */
.page-about .about-figure {
  margin: clamp(26px, 4vw, 44px) 0 0;
}
.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-figure .figure__caption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--c-stone);
}

/* 流程手风琴 */
.page-about .about-flow {
  margin-top: clamp(22px, 3vw, 34px);
  border-top: 2px solid var(--c-ink);
}
.page-about .accordion__item {
  border-bottom: 1px solid var(--about-edge);
}
.page-about .accordion__trigger {
  display: flex;
  align-items: baseline;
  gap: 14px;
  width: 100%;
  padding: 15px 0;
  background: none;
  border: 0;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 600;
  color: var(--c-ink);
}
.page-about .accordion__trigger:hover {
  color: var(--c-grass);
}
.page-about .accordion__trigger:focus-visible {
  outline: 2px solid var(--c-orange);
  outline-offset: 3px;
}
.page-about .accordion__trigger::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--c-stone);
}
.page-about .accordion__item[data-open="true"] .accordion__trigger::after {
  content: "–";
  color: var(--c-grass);
}
.page-about .accordion__step {
  flex: none;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--c-orange);
}
.page-about .accordion__panel {
  padding: 0 0 18px 0;
}
.page-about .accordion__item[data-open="false"] .accordion__panel {
  display: none;
}
.page-about .accordion__panel p {
  margin: 0 0 0.8em;
  font-size: 15px;
  line-height: 1.8;
  color: #33383a;
  max-width: 40em;
}
.page-about .accordion__panel p:last-child {
  margin-bottom: 0;
}

/* 版本 */
.page-about .about-versions {
  list-style: none;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}
.page-about .about-version {
  position: relative;
  background: var(--c-paper);
  border: 1px solid var(--about-edge);
  padding: 22px 20px 20px;
}
.page-about .about-version::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 46px;
  height: 4px;
  background: var(--c-grass);
}
.page-about .about-versions li:nth-child(2)::before {
  background: var(--c-orange);
}
.page-about .about-versions li:nth-child(3)::before {
  background: var(--c-clay);
}
.page-about .about-versions li:nth-child(4)::before {
  background: var(--c-night);
}
.page-about .about-version__code {
  display: block;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--c-stone);
  margin-bottom: 10px;
}
.page-about .about-version p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.8;
  color: #33383a;
}

/* 团队 */
.page-about .about-team__inner {
  display: grid;
  gap: clamp(24px, 3vw, 40px);
}
.page-about .about-team__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.3;
  margin: 10px 0 16px;
}
.page-about .about-team__num {
  font-size: clamp(64px, 12vw, 128px);
  line-height: 0.9;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--c-grass);
  margin: 0;
  display: block;
}
.page-about .about-team__sub {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-stone);
  max-width: 34em;
}
.page-about .about-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 2px solid var(--c-ink);
}
.page-about .about-team__item {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  column-gap: 14px;
  row-gap: 4px;
  padding: 16px 0;
  border-bottom: 1px solid var(--about-edge);
}
.page-about .about-team__count {
  grid-row: span 2;
  font-size: 26px;
  line-height: 1.1;
  font-weight: 700;
  color: var(--c-night);
}
.page-about .about-team__role {
  font-weight: 700;
  font-size: 15px;
}
.page-about .about-team__desc {
  font-size: 13px;
  line-height: 1.75;
  color: var(--c-stone);
}

/* 更新节奏 */
.page-about .about-rhythm {
  margin-top: 26px;
  padding: 18px 18px 16px;
  background: var(--c-paper);
  border: 1px solid var(--about-edge);
  box-shadow: var(--paper-shadow);
}
.page-about .about-rhythm__title {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--c-stone);
}
.page-about .about-scale {
  display: block;
  width: 100%;
  height: auto;
}
.page-about .about-scale__legend {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}
.page-about .about-scale__legend li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 12.5px;
  line-height: 1.7;
  color: #33383a;
}
.page-about .about-dot {
  flex: none;
  width: 10px;
  height: 10px;
  margin-top: 5px;
}
.page-about .about-dot--grass {
  background: var(--c-grass);
}
.page-about .about-dot--orange {
  background: var(--c-orange);
}

/* 时间轴 */
.page-about .about-timeline {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 82%;
  gap: 0;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  border-top: 2px solid var(--c-ink);
  padding-bottom: 12px;
}
.page-about .about-node {
  scroll-snap-align: start;
  position: relative;
  padding: 24px 20px 8px 0;
  border-right: 1px dashed var(--about-edge);
}
.page-about .about-node::before {
  content: "";
  position: absolute;
  top: -8px;
  left: 0;
  width: 12px;
  height: 12px;
  background: var(--c-grass);
  border: 2px solid var(--c-cream);
}
.page-about .about-node__year {
  margin: 0;
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--c-grass);
}
.page-about .about-node__tag {
  display: inline-block;
  margin-top: 10px;
  padding: 4px 14px 4px 10px;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--c-paper);
  background: var(--c-moss);
  clip-path: polygon(0 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}
.page-about .about-node__text {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: #33383a;
}
.page-about .about-split--reverse {
  margin-top: clamp(28px, 4vw, 46px);
}

/* 原则 */
.page-about .about-principles__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}
.page-about .about-principle {
  padding: 20px 0;
  border-top: 1px solid var(--about-edge);
}
.page-about .about-principle:last-child {
  border-bottom: 1px solid var(--about-edge);
}
.page-about .about-principle__num {
  display: block;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-orange);
  margin-bottom: 8px;
}
.page-about .about-principle p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: #33383a;
  max-width: 40em;
}

/* 结尾 */
.page-about .about-cta {
  margin-top: clamp(52px, 8vw, 100px);
  background: var(--c-night);
  color: var(--c-paper);
  clip-path: polygon(0 22px, 100% 0, 100% 100%, 0 100%);
  padding: clamp(44px, 6vw, 76px) 0 clamp(38px, 5vw, 60px);
}
.page-about .about-cta .eyebrow {
  color: var(--c-lime);
}
.page-about .about-cta__inner {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}
.page-about .about-cta h2 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(24px, 3.4vw, 36px);
  line-height: 1.32;
  margin: 10px 0 16px;
}
.page-about .about-cta__lead p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(255, 253, 247, 0.82);
  max-width: 40em;
}
.page-about .about-cta__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: start;
}
.page-about .about-cta__links .btn {
  display: inline-block;
}

@media (min-width: 620px) {
  .page-about .about-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
  }
  .page-about .about-versions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-timeline {
    grid-auto-columns: 46%;
  }
  .page-about .about-team__item {
    grid-template-columns: 68px minmax(0, 1fr);
  }
}

@media (min-width: 900px) {
  .page-about .about-masthead__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
  }
  .page-about .about-masthead__aside {
    transform: rotate(-0.5deg);
  }
  .page-about .about-split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }
  .page-about .about-split--reverse {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    align-items: start;
  }
  .page-about .about-versions {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-team__inner {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    align-items: start;
  }
  .page-about .about-timeline {
    grid-auto-columns: minmax(0, 1fr);
    padding-bottom: 16px;
  }
  .page-about .about-principles__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 48px;
  }
  .page-about .about-principle:nth-child(2) {
    border-top: 1px solid var(--about-edge);
  }
  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: end;
  }
  .page-about .about-cta__links {
    justify-content: flex-end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-masthead__aside {
    transform: none;
  }
  .page-about .about-timeline {
    scroll-behavior: auto;
  }
}
<<<END>>>