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

/* ---------- 封面 ---------- */
.page-about .about-cover {
  position: relative;
  overflow: hidden;
  background: var(--night);
  color: var(--bone);
  padding: clamp(22px, 5vw, 40px) 0 clamp(34px, 6vw, 72px);
}

.page-about .about-cover::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(112deg, rgba(232, 241, 248, 0.07) 0 1px, transparent 1px 30px);
  pointer-events: none;
}

.page-about .about-cover::after {
  content: "";
  position: absolute;
  right: -20%;
  bottom: -60%;
  width: 64%;
  height: 160%;
  background: linear-gradient(180deg, rgba(181, 106, 74, 0.32), transparent 72%);
  transform: rotate(-12deg);
  pointer-events: none;
}

.page-about .about-cover__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-cover .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 clamp(18px, 4vw, 38px);
  padding: 0;
  list-style: none;
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-about .about-cover .breadcrumbs a {
  color: rgba(247, 244, 236, 0.72);
  text-decoration: none;
  border-bottom: 1px solid rgba(247, 244, 236, 0.28);
}

.page-about .about-cover .breadcrumbs a:hover,
.page-about .about-cover .breadcrumbs a:focus-visible {
  color: var(--bone);
  border-color: var(--yellow);
}

.page-about .about-cover .breadcrumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(247, 244, 236, 0.4);
}

.page-about .about-cover .breadcrumbs li[aria-current="page"] {
  color: var(--yellow);
}

.page-about .about-cover__eyebrow {
  margin: 0 0 clamp(10px, 2vw, 18px);
  color: var(--yellow);
  letter-spacing: 0.12em;
}

.page-about .about-cover__title {
  margin: 0;
  font-family: var(--sans);
  font-weight: 900;
  font-size: clamp(2.1rem, 7.2vw, 4.6rem);
  line-height: 1.08;
  letter-spacing: -0.015em;
  color: var(--bone);
}

.page-about .about-cover__lead {
  margin: clamp(18px, 3vw, 28px) 0 0;
  max-width: 46ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.85;
  color: rgba(247, 244, 236, 0.86);
}

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(28px, 5vw, 48px) 0 0;
  padding: 0;
  list-style: none;
  background: rgba(232, 241, 248, 0.24);
  border-top: 1px solid rgba(232, 241, 248, 0.24);
  border-bottom: 1px solid rgba(232, 241, 248, 0.24);
}

.page-about .about-figure {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px 18px;
  background: var(--night);
}

.page-about .about-figure__num {
  font-size: clamp(1.35rem, 3.4vw, 2rem);
  font-weight: 600;
  color: var(--yellow);
  letter-spacing: -0.01em;
}

.page-about .about-figure__label {
  font-size: 12.5px;
  line-height: 1.6;
  color: rgba(247, 244, 236, 0.7);
}

/* ---------- 正文骨架 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 52px);
  padding-top: clamp(32px, 6vw, 68px);
  padding-bottom: clamp(44px, 8vw, 92px);
}

/* ---------- 章节索引 ---------- */
.page-about .about-rail__title {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--stone);
}

.page-about .about-rail__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 7px 11px;
  font-size: 12.5px;
  line-height: 1.4;
  color: var(--plateau);
  text-decoration: none;
  background: var(--sky);
  border-left: 2px solid transparent;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-about .about-rail__link .mono {
  font-size: 10.5px;
  color: var(--clay);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  background: #fff;
  border-left-color: var(--blue);
  color: var(--night);
}

/* ---------- 章节 ---------- */
.page-about .about-scroll {
  min-width: 0;
}

.page-about .about-chapter {
  --band: var(--clay);
  padding: clamp(26px, 5vw, 42px) 0 clamp(30px, 5vw, 52px);
  border-top: 1px solid var(--line);
}

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

.page-about .about-chapter::before {
  content: "";
  display: block;
  width: 56px;
  height: 5px;
  margin-bottom: clamp(16px, 3vw, 26px);
  background: var(--band);
}

.page-about .about-chapter--clay { --band: var(--clay); }
.page-about .about-chapter--moss { --band: var(--moss); }
.page-about .about-chapter--blue { --band: var(--blue); }

.page-about .about-chapter__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(12px, 3vw, 24px);
  align-items: start;
  margin-bottom: clamp(16px, 3vw, 26px);
}

.page-about .about-chapter__num {
  font-family: var(--mono);
  font-weight: 300;
  font-size: clamp(2rem, 7vw, 3.4rem);
  line-height: 0.9;
  letter-spacing: -0.02em;
  color: rgba(22, 62, 99, 0.24);
}

.page-about .about-chapter__kicker {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--stone);
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--sans);
  font-weight: 800;
  font-size: clamp(1.4rem, 4vw, 2.2rem);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--night);
}

/* ---------- 正文 ---------- */
.page-about .about-prose {
  max-width: 64ch;
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.9;
  color: #2c3236;
  overflow-wrap: break-word;
}

.page-about .about-prose p {
  margin: 0 0 1em;
}

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

.page-about .about-prose strong {
  font-weight: 700;
  color: var(--night);
}

.page-about .about-prose a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-prose a:hover {
  color: var(--clay-deep);
}

/* ---------- 图片 ---------- */
.page-about .about-media {
  margin: clamp(20px, 4vw, 34px) 0;
}

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

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

.page-about .about-media .media__cap {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--stone);
}

/* ---------- 引用板 ---------- */
.page-about .about-quote {
  margin: clamp(22px, 4vw, 36px) 0 0;
  padding: clamp(20px, 4vw, 32px);
  background: var(--sky);
  clip-path: var(--cut);
}

.page-about .about-quote p {
  margin: 0;
  font-size: clamp(15px, 2vw, 18px);
  line-height: 1.75;
  font-weight: 500;
  color: var(--plateau);
}

/* ---------- 团队分工 ---------- */
.page-about .about-crew {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: clamp(20px, 4vw, 32px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-crew__item {
  padding: 18px 18px 20px;
  background: #fff;
  border-top: 3px solid var(--moss);
  box-shadow: 0 18px 34px -30px rgba(14, 42, 71, 0.6);
}

.page-about .about-crew__item:nth-child(2) {
  border-top-color: var(--clay);
}

.page-about .about-crew__item:nth-child(3) {
  border-top-color: var(--blue);
}

.page-about .about-crew__when {
  margin: 0 0 8px;
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--stone);
}

.page-about .about-crew__name {
  margin: 0 0 8px;
  font-size: 1.06rem;
  font-weight: 800;
  color: var(--night);
}

.page-about .about-crew__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: #3a4045;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  margin: clamp(20px, 4vw, 32px) 0 0;
  padding: 0 0 0 22px;
  list-style: none;
  border-left: 2px solid var(--line-strong);
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: 6px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -29px;
  top: 16px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--blue);
}

.page-about .about-timeline details {
  border-bottom: 1px dashed var(--line);
}

.page-about .about-timeline summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 12px 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--night);
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-timeline summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--mono);
  font-size: 15px;
  color: var(--clay);
}

.page-about .about-timeline details[open] summary::after {
  content: "–";
}

.page-about .about-timeline summary:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

.page-about .about-timeline__when {
  padding: 2px 8px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--plateau);
  background: var(--sky);
}

.page-about .about-timeline details p {
  margin: 0 0 14px;
  max-width: 58ch;
  font-size: 14px;
  line-height: 1.85;
  color: #3a4045;
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding: clamp(20px, 4vw, 34px);
  background: rgba(94, 122, 90, 0.1);
  clip-path: var(--cut);
}

.page-about .about-partners__lead {
  margin: 0 0 16px;
  font-size: clamp(15px, 1.7vw, 16.5px);
  line-height: 1.85;
  color: #2c3236;
}

.page-about .about-partners__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .about-partners__list li {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 10px;
  font-size: 14px;
  line-height: 1.8;
  color: #3a4045;
}

.page-about .about-partners__list .mono {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--moss);
  padding-top: 2px;
}

/* ---------- 更新节奏 ---------- */
.page-about .about-rhythm {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin: clamp(18px, 4vw, 30px) 0;
  padding: 0;
  list-style: none;
}

.page-about .about-rhythm__item {
  padding: 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-left: 3px solid var(--yellow);
}

.page-about .about-rhythm__when {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--clay);
}

.page-about .about-rhythm__name {
  margin: 0 0 8px;
  font-size: 1rem;
  font-weight: 800;
  color: var(--night);
}

.page-about .about-rhythm__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: #3a4045;
}

/* ---------- 延伸入口 ---------- */
.page-about .about-next {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin: clamp(18px, 4vw, 30px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-next a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 18px;
  background: var(--night);
  color: var(--bone);
  text-decoration: none;
  font-size: 14.5px;
  line-height: 1.6;
  clip-path: var(--cut-sm);
  transition: background 0.25s var(--ease);
}

.page-about .about-next a:hover,
.page-about .about-next a:focus-visible {
  background: var(--plateau);
}

.page-about .about-next a span:last-child {
  flex: none;
  font-family: var(--mono);
  color: var(--yellow);
}

.page-about .about-top {
  margin: clamp(20px, 4vw, 30px) 0 0;
  font-size: 13px;
}

.page-about .about-top a {
  color: var(--stone);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 2px;
}

.page-about .about-top a:hover,
.page-about .about-top a:focus-visible {
  color: var(--clay-deep);
  border-color: var(--clay);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-figure {
    padding: 18px 16px 20px;
  }

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

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

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

  .page-about .about-crew__item:nth-child(2) {
    margin-top: 32px;
  }

  .page-about .about-crew__item:nth-child(3) {
    margin-top: 64px;
  }
}

@media (min-width: 900px) {
  .page-about .about-body {
    grid-template-columns: 190px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-offset) + 16px);
    align-self: start;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 4px;
  }

  .page-about .about-rail__link {
    display: flex;
    background: transparent;
    padding: 8px 10px;
    border-left: 2px solid var(--line);
  }

  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    background: var(--sky);
    border-left-color: var(--blue);
  }

  .page-about .about-chapter__head {
    grid-template-columns: minmax(0, 120px) minmax(0, 1fr);
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail__link,
  .page-about .about-next a {
    transition: none;
  }
}
<<<END>>>