.page-about {
  --about-body-text: #23405c;
  --about-rail: 96px;
  background: var(--snow);
  color: var(--high-blue);
}

.page-about .about-crumb {
  width: var(--shell);
  margin: 0 auto;
  padding: var(--space-3) 0 var(--space-2);
  font-size: 0.78rem;
}
.page-about .about-crumb .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .about-crumb .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 6px;
  color: var(--stone);
}
.page-about .about-crumb .breadcrumb__link {
  color: var(--stone);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.page-about .about-crumb .breadcrumb__link:hover,
.page-about .about-crumb .breadcrumb__link[aria-current="page"] {
  color: var(--high-blue);
  border-bottom-color: var(--cyan);
}

/* ---------- 封面首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(40px, 8vw, 88px) 0 clamp(64px, 11vw, 132px);
  background:
    radial-gradient(120% 130% at 88% 0%, #12406c 0%, var(--high-blue) 46%, var(--night) 100%);
  color: var(--snow);
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(185, 214, 234, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(185, 214, 234, 0.07) 1px, transparent 1px);
  background-size: 72px 72px;
  pointer-events: none;
}
.page-about .about-hero__ridge {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  width: 100%;
  height: clamp(90px, 18vw, 230px);
  pointer-events: none;
}
.page-about .about-hero__inner {
  position: relative;
  z-index: 2;
  width: var(--shell);
  margin: 0 auto;
}
.page-about .about-hero__eyebrow {
  margin: 0 0 var(--space-3);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}
.page-about .about-hero__title {
  margin: 0;
  max-width: 20em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 7vw, 4.2rem);
  line-height: 0.98;
  letter-spacing: -0.04em;
  color: var(--snow);
}
.page-about .about-hero__lede {
  margin: var(--space-3) 0 0;
  max-width: 38em;
  font-size: clamp(0.95rem, 2.2vw, 1.1rem);
  line-height: 1.85;
  color: var(--ice);
}
.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: var(--space-4);
}
.page-about .data-chip {
  display: inline-block;
  padding: 7px 13px;
  border: 1px solid rgba(185, 214, 234, 0.28);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: var(--ice);
  white-space: nowrap;
}
.page-about .data-chip--accent {
  border-color: var(--orange);
  background: var(--orange);
  color: var(--night);
  font-weight: 700;
}

/* ---------- 章节索引条 ---------- */
.page-about .about-jump {
  background: var(--paper);
  border-bottom: 1px solid var(--line-light);
}
.page-about .about-jump__inner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: var(--shell);
  margin: 0 auto;
  padding: 12px 0;
  overflow-x: auto;
  scrollbar-width: none;
}
.page-about .about-jump__inner::-webkit-scrollbar {
  display: none;
}
.page-about .about-jump__label {
  flex: none;
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: var(--stone);
}
.page-about .about-jump__list {
  display: flex;
  flex: none;
  gap: 18px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .about-jump__link {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--high-blue);
  text-decoration: none;
  white-space: nowrap;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.page-about .about-jump__link:hover,
.page-about .about-jump__link:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  width: var(--shell);
  margin: 0 auto;
  padding: clamp(48px, 8vw, 104px) 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-3);
  border-bottom: 1px solid var(--line-light);
}
.page-about .about-section__rail {
  display: flex;
  align-items: baseline;
  gap: 12px;
}
.page-about .about-section__num {
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--orange);
}
.page-about .about-section__tag {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--stone);
}
.page-about .about-section__body {
  max-width: 780px;
}
.page-about .about-section__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 4.4vw, 2.4rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--high-blue);
}
.page-about .about-section__lede {
  margin: var(--space-3) 0 0;
  font-size: clamp(1rem, 2.4vw, 1.08rem);
  line-height: 1.9;
  color: var(--about-body-text);
  max-width: 40em;
}
.page-about .about-section__body > p {
  margin: var(--space-3) 0 0;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--about-body-text);
  max-width: 44em;
}
.page-about .about-section__more {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: var(--space-4) !important;
}
.page-about .button {
  display: inline-block;
  padding: 12px 22px;
  font-family: var(--font-body);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background 0.24s ease, color 0.24s ease, border-color 0.24s ease, transform 0.24s ease;
}
.page-about .button--primary {
  background: var(--orange);
  color: var(--night);
  border-color: var(--orange);
}
.page-about .button--primary:hover {
  background: var(--high-blue);
  border-color: var(--high-blue);
  color: var(--snow);
  transform: translateY(-2px);
}
.page-about .button--ghost {
  background: transparent;
  color: var(--high-blue);
  border-color: var(--line-light);
}
.page-about .button--ghost:hover {
  border-color: var(--cyan);
  color: var(--high-blue);
  transform: translateY(-2px);
}
.page-about .button--light {
  background: transparent;
  color: var(--snow);
  border-color: rgba(185, 214, 234, 0.4);
}
.page-about .button--light:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  transform: translateY(-2px);
}

/* ---------- 图版 ---------- */
.page-about .about-figure {
  margin: var(--space-4) 0 0;
}
.page-about .about-figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line-light);
  background: var(--paper);
}
.page-about .about-figure__cap {
  margin: 10px 0 0;
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--stone);
}

/* ---------- 团队分工 ---------- */
.page-about .about-roles {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  border-top: 1px solid var(--line-light);
}
.page-about .about-role {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 4px var(--space-2);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--line-light);
  transition: background 0.24s ease;
}
.page-about .about-role:hover {
  background: linear-gradient(90deg, rgba(255, 106, 26, 0.09), transparent 72%);
}
.page-about .about-role__num {
  grid-row: span 2;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--orange);
}
.page-about .about-role__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--high-blue);
}
.page-about .about-role__desc {
  margin: 6px 0 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--about-body-text);
}

/* ---------- 时间线 ---------- */
.page-about .about-milestone__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-4);
}
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 10px;
  bottom: 14px;
  width: 2px;
  background: linear-gradient(180deg, var(--orange), var(--cyan));
  opacity: 0.75;
}
.page-about .about-milestone {
  position: relative;
  padding: 0 0 var(--space-4) 34px;
}
.page-about .about-milestone:last-child {
  padding-bottom: 0;
}
.page-about .about-milestone::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid var(--high-blue);
  background: var(--snow);
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}
.page-about .about-milestone:hover::before {
  background: var(--orange);
  border-color: var(--orange);
  transform: scale(1.18);
}
.page-about .about-milestone__season {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--orange);
}
.page-about .about-milestone__title {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 800;
  line-height: 1.4;
  color: var(--high-blue);
}
.page-about .about-milestone__text {
  margin: 8px 0 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--about-body-text);
}

/* ---------- 引语 ---------- */
.page-about .about-quote {
  position: relative;
  overflow: hidden;
  padding: clamp(48px, 9vw, 104px) 0;
  background:
    linear-gradient(115deg, var(--night) 0%, var(--high-blue) 62%, #133f66 100%);
  color: var(--snow);
}
.page-about .about-quote::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -60px;
  width: 260px;
  height: 260px;
  border: 1px solid rgba(25, 227, 196, 0.28);
  border-radius: 50%;
  pointer-events: none;
}
.page-about .about-quote__inner {
  position: relative;
  z-index: 2;
  width: var(--shell);
  margin: 0 auto;
  max-width: 780px;
  padding-left: var(--space-3);
  border-left: 3px solid var(--orange);
}
.page-about .about-quote__text {
  margin: 0;
  max-width: 22em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.3rem, 4vw, 2.2rem);
  line-height: 1.32;
  letter-spacing: -0.03em;
  color: var(--snow);
}

/* ---------- 工作流 ---------- */
.page-about .about-flow__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-4);
}
.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-about .about-flow__item {
  position: relative;
  padding: var(--space-3);
  background: var(--paper);
  border-left: 3px solid var(--orange);
  transition: background 0.22s ease, border-color 0.22s ease, transform 0.22s ease;
}
.page-about .about-flow__item:hover {
  background: #f2ece0;
  border-left-color: var(--cyan);
  transform: translateY(-2px);
}
.page-about .about-flow__num {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--stone);
}
.page-about .about-flow__title {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 800;
  color: var(--high-blue);
}
.page-about .about-flow__text {
  margin: 8px 0 0;
  font-size: 0.92rem;
  line-height: 1.78;
  color: var(--about-body-text);
}

/* ---------- 合作生态 ---------- */
.page-about .about-wall {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
}
.page-about .about-tag {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 14px;
  background: var(--white);
  border: 1px solid var(--line-light);
  font-size: 0.86rem;
  color: var(--high-blue);
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}
.page-about .about-tag:hover {
  border-color: var(--cyan);
  background: var(--paper);
  transform: translateY(-2px);
}
.page-about .about-tag__kind {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.04em;
  color: var(--moss);
  transition: opacity 0.2s ease;
}
.page-about .about-honors {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-about .about-honor {
  padding: var(--space-3);
  border: 1px solid var(--line-light);
  border-top: 3px solid var(--clay);
  background: var(--snow);
}
.page-about .about-honor__mark {
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--clay);
}
.page-about .about-honor__text {
  margin: 8px 0 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--about-body-text);
}

/* ---------- 订阅场景与数据侧栏 ---------- */
.page-about .about-serve {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-4);
}
.page-about .about-scenes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}
.page-about .about-scene {
  padding-left: var(--space-3);
  border-left: 1px solid var(--line-light);
  transition: border-color 0.2s ease;
}
.page-about .about-scene:hover {
  border-left-color: var(--orange);
}
.page-about .about-scene__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 800;
  line-height: 1.45;
  color: var(--high-blue);
}
.page-about .about-scene__text {
  margin: 8px 0 0;
  font-size: 0.93rem;
  line-height: 1.82;
  color: var(--about-body-text);
}
.page-about .about-side {
  background: var(--paper);
  padding: var(--space-3);
  border-top: 3px solid var(--high-blue);
}
.page-about .about-side__label {
  margin: 0;
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: var(--stone);
}
.page-about .about-side__list {
  list-style: none;
  margin: var(--space-2) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.page-about .about-side__item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(10, 40, 70, 0.12);
}
.page-about .about-side__item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}
.page-about .about-side__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--orange);
}
.page-about .about-side__txt {
  font-size: 0.86rem;
  line-height: 1.6;
  color: var(--high-blue);
}
.page-about .about-side__note {
  margin: var(--space-3) 0 0;
  font-size: 0.8rem;
  line-height: 1.75;
  color: var(--stone);
}

/* ---------- 合作邀请 ---------- */
.page-about .about-join {
  padding: clamp(48px, 8vw, 104px) 0;
  background: var(--high-blue);
  color: var(--snow);
}
.page-about .about-join__inner {
  width: var(--shell);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
}
.page-about .about-join__head .about-section__num {
  color: var(--cyan);
}
.page-about .about-join__title {
  margin: var(--space-2) 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 4.6vw, 2.4rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--snow);
}
.page-about .about-join__text {
  margin: var(--space-3) 0 0;
  max-width: 34em;
  font-size: 0.98rem;
  line-height: 1.88;
  color: var(--ice);
}
.page-about .about-join__side {
  align-self: end;
  padding-top: var(--space-3);
  border-top: 1px solid rgba(185, 214, 234, 0.24);
}
.page-about .about-join__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-about .about-join__note {
  margin: var(--space-3) 0 0;
  font-size: 0.82rem;
  line-height: 1.8;
  color: var(--ice);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-honors {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-role {
    grid-template-columns: 56px 180px minmax(0, 1fr);
    align-items: baseline;
    gap: var(--space-2);
  }
  .page-about .about-role__num {
    grid-row: auto;
  }
  .page-about .about-role__desc {
    margin: 0;
  }
}

@media (min-width: 860px) {
  .page-about .about-section {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(28px, 5vw, 72px);
    align-items: start;
  }
  .page-about .about-section__rail {
    position: sticky;
    top: 24px;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .page-about .about-section__num {
    font-size: 2.3rem;
  }
  .page-about .about-role {
    grid-template-columns: 64px 200px minmax(0, 1fr);
    padding: var(--space-3) 12px var(--space-3) 0;
  }
  .page-about .about-serve {
    grid-template-columns: minmax(0, 1fr) 280px;
    align-items: start;
  }
  .page-about .about-side {
    position: sticky;
    top: 24px;
  }
  .page-about .about-join__inner {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: clamp(28px, 5vw, 72px);
    align-items: start;
  }
}

@media (min-width: 1040px) {
  .page-about .about-milestone__grid {
    grid-template-columns: minmax(0, 1fr) 280px;
    align-items: start;
  }
  .page-about .about-flow__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    align-items: start;
  }
  .page-about .about-figure--tall {
    margin-top: 4px;
  }
}
<<<END>>>