.page-about {
  background-color: var(--cream);
  background-image: radial-gradient(rgba(59, 42, 30, .05) .8px, transparent .8px);
  background-size: 4px 4px;
  color: var(--saddle);
  font-family: var(--font-sans);
  line-height: 1.6;
  padding-bottom: 0;
  overflow-x: clip;
}

.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

.page-about .about-wrap {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  padding-top: 20px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: .1em;
}

.page-about .about-crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-crumbs li {
  color: var(--saddle);
}

.page-about .about-crumbs li + li::before {
  content: "/";
  margin-right: 6px;
  color: var(--grass);
}

.page-about .about-crumbs a {
  color: var(--saddle);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

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

.page-about .about-crumbs a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  box-shadow: 0 0 0 4px rgba(28, 23, 32, .28);
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  padding: 16px 0 0;
}

.page-about .about-hero__frame {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border: 1px solid var(--line-strong);
  background: var(--paper);
  box-shadow: var(--shadow-1);
}

.page-about .about-hero__frame::before,
.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  border: 2px solid var(--cyan);
  pointer-events: none;
  z-index: 3;
}

.page-about .about-hero__frame::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.page-about .about-hero__frame::after {
  right: -1px;
  bottom: -1px;
  border-left: 0;
  border-top: 0;
}

.page-about .about-hero__media {
  position: relative;
  margin: 0;
  overflow: hidden;
  background: var(--concrete);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  aspect-ratio: 16 / 11;
  object-fit: cover;
  filter: saturate(.82) contrast(1.03);
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(28, 23, 32, .3) .9px, transparent .9px);
  background-size: 3px 3px;
  opacity: .32;
  pointer-events: none;
}

.page-about .about-hero__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 6px 10px;
  background: var(--saddle);
  color: var(--cream);
  font-family: var(--font-num);
  font-size: 10px;
  letter-spacing: .18em;
}

.page-about .about-hero__text {
  padding: 22px 20px 26px;
  border-top: 1px solid var(--line-strong);
}

.page-about .about-hero__text::before {
  content: "";
  display: block;
  height: 8px;
  margin-bottom: 16px;
  background-image: repeating-linear-gradient(to right, var(--line-strong) 0 1px, transparent 1px 11px);
}

.page-about .about-eyebrow {
  margin: 0 0 10px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--rust);
}

.page-about .about-hero__title {
  margin: 0 0 14px;
  font-size: clamp(27px, 6.4vw, 44px);
  line-height: 1.14;
  font-weight: 900;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.74;
  color: var(--saddle);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 12px;
  margin: 22px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.page-about .about-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-about .about-stat__num {
  font-family: var(--font-num);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -.01em;
  color: var(--saddle);
  border-bottom: 2px solid var(--cyan);
  align-self: flex-start;
  padding-bottom: 2px;
}

.page-about .about-stat__label {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--grass);
}

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

/* ---------- 章节通用 ---------- */
.page-about .about-chapter {
  padding: 34px 0;
  border-top: 1px solid var(--line);
  margin-top: 32px;
}

.page-about .about-hero + .about-chapter {
  border-top: 0;
  margin-top: 4px;
}

.page-about .about-chapter__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-chapter__rail {
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-about .about-chapter__num {
  padding: 3px 7px;
  border: 1px solid var(--rust);
  border-radius: var(--radius);
  font-family: var(--font-num);
  font-size: 11px;
  line-height: 1;
  letter-spacing: .14em;
  color: var(--rust);
}

.page-about .about-chapter__tag {
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--grass);
}

.page-about .about-chapter__title {
  margin: 0 0 18px;
  font-size: clamp(22px, 4.4vw, 34px);
  line-height: 1.2;
  font-weight: 900;
  letter-spacing: -.015em;
  color: var(--ink);
}

.page-about .about-chapter__title::after {
  content: "";
  display: block;
  width: 44px;
  height: 3px;
  margin-top: 14px;
  background: var(--amber);
}

.page-about .about-prose {
  max-width: 68ch;
}

.page-about .about-prose p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--saddle);
}

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

.page-about .about-prose a {
  color: var(--rust);
  text-decoration: none;
  border-bottom: 1px solid rgba(180, 74, 46, .45);
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.page-about .about-prose a:hover {
  color: var(--saddle);
  border-bottom-color: var(--amber);
}

.page-about .about-prose a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  box-shadow: 0 0 0 4px rgba(28, 23, 32, .28);
}

/* ---------- 团队四象限 ---------- */
.page-about .about-team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin-top: 26px;
}

.page-about .about-quad {
  position: relative;
  padding: 16px 16px 20px;
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  transition: transform .18s var(--ease), border-color .18s var(--ease), box-shadow .18s var(--ease);
}

.page-about .about-quad:hover,
.page-about .about-quad:focus-within {
  transform: translateY(-2px);
  border-color: var(--cyan);
  box-shadow: var(--shadow-1);
}

.page-about .about-quad__idx {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--rust);
}

.page-about .about-quad__name {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 900;
  letter-spacing: -.01em;
  color: var(--saddle);
}

.page-about .about-quad__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.68;
  color: var(--saddle);
}

/* ---------- 配图 ---------- */
.page-about .about-fig {
  margin: 22px 0 0;
  padding: 8px;
  background: var(--paper);
  border: 1px solid var(--line-strong);
}

.page-about .about-fig img {
  display: block;
  width: 100%;
  height: auto;
  filter: saturate(.85) contrast(1.02);
}

.page-about .about-fig figcaption {
  padding: 10px 2px 2px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--saddle);
}

/* ---------- 地平线分隔 ---------- */
.page-about .about-horizon {
  margin: 14px 0 0;
  line-height: 0;
}

.page-about .about-horizon svg {
  display: block;
  width: 100%;
  height: 22px;
}

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

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(to bottom, var(--rust), var(--concrete));
}

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

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

.page-about .about-stop::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 7px;
  width: 9px;
  height: 9px;
  border: 1px solid var(--rust);
  border-radius: 50%;
  background: var(--cream);
}

.page-about .about-stop__year {
  display: inline-block;
  margin-right: 10px;
  font-family: var(--font-num);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--saddle);
}

.page-about .about-stop__year--now {
  padding: 1px 7px;
  border-radius: var(--radius);
  background: var(--amber);
  color: var(--saddle-deep);
}

.page-about .about-stop__title {
  display: inline;
  margin: 0;
  font-size: 15px;
  font-weight: 800;
  color: var(--saddle);
}

.page-about .about-stop__text {
  max-width: 62ch;
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--saddle);
}

/* ---------- 流程步骤 ---------- */
.page-about .about-steps {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-step {
  padding: 18px 18px 20px;
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  transition: transform .18s var(--ease), border-color .18s var(--ease);
}

.page-about .about-step:hover {
  transform: translateY(-2px);
  border-color: var(--cyan);
}

.page-about .about-step__n {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--rust);
}

.page-about .about-step__title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 900;
  color: var(--saddle);
}

.page-about .about-step__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--saddle);
}

.page-about .about-step--key {
  background: var(--saddle);
  border-color: var(--saddle);
}

.page-about .about-step--key .about-step__n {
  color: var(--cyan);
}

.page-about .about-step--key .about-step__title {
  color: var(--cream);
}

.page-about .about-step--key .about-step__text {
  color: rgba(244, 238, 223, .84);
}

/* ---------- 原则 ---------- */
.page-about .about-principles {
  margin-top: 24px;
  border-top: 1px solid var(--line-strong);
}

.page-about .about-principle {
  padding: 18px 0 16px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-principle h3 {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 900;
  color: var(--saddle);
}

.page-about .about-principle p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--saddle);
}

/* ---------- 认可标签 ---------- */
.page-about .about-honors {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

.page-about .about-honor {
  display: inline-block;
  padding: 6px 12px;
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--rust);
  border-radius: var(--radius);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--saddle);
}

.page-about .about-note {
  margin: 18px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--amber);
  font-size: 13px;
  line-height: 1.72;
  color: var(--saddle);
}

/* ---------- 结尾入口 ---------- */
.page-about .about-next {
  margin-top: 36px;
  padding: 38px 0 16px;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(59, 42, 30, .045), rgba(59, 42, 30, 0));
}

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

.page-about .about-next__title {
  margin: 0 0 10px;
  font-size: clamp(22px, 4vw, 30px);
  line-height: 1.2;
  font-weight: 900;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-about .about-next__text {
  max-width: 46ch;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--saddle);
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-btn {
  display: inline-block;
  padding: 11px 20px;
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--saddle);
  text-decoration: none;
  transition: transform .16s var(--ease), border-color .16s var(--ease), background-color .16s var(--ease), color .16s var(--ease);
}

.page-about .about-btn:hover {
  transform: translateY(-2px);
  border-color: var(--amber);
}

.page-about .about-btn--solid {
  background: var(--saddle);
  border-color: var(--saddle);
  color: var(--cream);
}

.page-about .about-btn--solid:hover {
  background: var(--saddle-deep);
  border-color: var(--amber);
}

.page-about .about-btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  box-shadow: 0 0 0 4px rgba(28, 23, 32, .28);
}

/* ---------- 平板 ---------- */
@media (min-width: 560px) {
  .page-about .about-team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .page-about .about-hero__stats {
    gap: 16px;
  }
}

@media (min-width: 720px) {
  .page-about .about-prose p {
    font-size: 16px;
  }

  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

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

  .page-about .about-principle {
    padding: 20px 20px 8px;
    border-bottom: 0;
    border-left: 1px solid var(--line);
  }

  .page-about .about-principle:first-child {
    padding-left: 0;
    border-left: 0;
  }

  .page-about .about-stop {
    padding-bottom: 26px;
  }

  .page-about .about-stop__year {
    font-size: 18px;
  }

  .page-about .about-stop__title {
    font-size: 16px;
  }

  .page-about .about-stop__text {
    font-size: 14.5px;
    margin-top: 8px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero {
    padding-top: 22px;
  }

  .page-about .about-hero__frame {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-hero__media img {
    aspect-ratio: auto;
    height: 100%;
    min-height: 430px;
  }

  .page-about .about-hero__text {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 34px 30px 32px;
    border-top: 0;
    border-left: 1px solid var(--line-strong);
  }

  .page-about .about-hero__stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 16px;
  }

  .page-about .about-stat__num {
    font-size: 27px;
  }

  .page-about .about-chapter {
    padding: 50px 0;
    margin-top: 44px;
  }

  .page-about .about-hero + .about-chapter {
    margin-top: 12px;
  }

  .page-about .about-chapter__inner {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 46px;
    align-items: start;
  }

  .page-about .about-chapter__rail {
    position: sticky;
    top: 26px;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }

  .page-about .about-chapter__tag {
    writing-mode: vertical-rl;
    letter-spacing: .3em;
  }

  .page-about .about-fig {
    max-width: 720px;
  }

  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    gap: 32px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero__rot {
    display: block;
    position: absolute;
    right: -2px;
    bottom: 10px;
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    font-family: var(--font-num);
    font-size: 10px;
    letter-spacing: .32em;
    color: var(--rust);
    pointer-events: none;
  }

  .page-about .about-hero__title {
    font-size: 46px;
  }

  .page-about .about-chapter__inner {
    grid-template-columns: 156px minmax(0, 1fr);
    gap: 56px;
  }
}
<<<END>>>