.page-about {
  --about-line: rgba(168, 179, 199, 0.26);
  --about-line-dark: rgba(244, 246, 250, 0.18);
  --about-soft: rgba(244, 246, 250, 0.06);
  background: var(--c-paper);
  color: var(--c-graphite);
  font-family: var(--font-sans);
  line-height: 1.75;
  overflow-x: hidden;
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  position: relative;
  background: var(--c-ink);
  color: var(--c-paper);
  padding: 1.5rem 0 3.25rem;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -10%;
  right: -20%;
  width: 78%;
  height: 120%;
  background: linear-gradient(155deg, rgba(22, 93, 255, 0.36), rgba(255, 122, 26, 0.12) 58%, transparent 85%);
  clip-path: polygon(30% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

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

.page-about .about-hero__crumb {
  margin-bottom: 2rem;
  font-size: 0.85rem;
}

.page-about .about-hero__crumb a,
.page-about .about-hero__crumb .breadcrumb__sep {
  color: var(--c-silver);
  text-decoration: none;
}

.page-about .about-hero__crumb a:hover {
  color: var(--c-orange);
}

.page-about .about-hero__crumb [aria-current="page"] {
  color: var(--c-paper);
  font-weight: 600;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 2.25rem;
}

.page-about .about-hero__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  color: var(--c-orange);
}

.page-about .about-hero__title {
  margin: 0.85rem 0 0;
  font-size: clamp(1.75rem, 6.5vw, 4.2rem);
  line-height: 1.12;
  font-weight: 900;
  letter-spacing: 0.03em;
}

.page-about .about-hero__title::after {
  content: "";
  display: block;
  width: 4.5rem;
  height: 0.35rem;
  margin-top: 1.15rem;
  background: var(--c-orange);
}

.page-about .about-hero__lede {
  margin: 1.35rem 0 0;
  max-width: 40ch;
  font-size: 1rem;
  color: #D5DCEA;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.9rem;
}

.page-about .about-hero .btn--ghost {
  background: transparent;
  border: 1px solid rgba(244, 246, 250, 0.42);
  color: var(--c-paper);
}

.page-about .about-hero .btn--ghost:hover {
  border-color: var(--c-orange);
  color: var(--c-orange);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
}

.page-about .about-fact {
  position: relative;
  padding: 1.15rem 0.9rem 0.95rem;
  background: var(--about-soft);
  border: 1px solid var(--about-line-dark);
  border-radius: var(--radius-m);
}

.page-about .about-fact::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0.9rem;
  width: 1.6rem;
  height: 2px;
  background: var(--c-orange);
}

.page-about .about-fact__num {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--c-paper);
}

.page-about .about-fact__suffix {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--c-orange);
  margin-left: 0.15rem;
}

.page-about .about-fact__label {
  display: block;
  margin-top: 0.4rem;
  font-size: 0.8rem;
  color: var(--c-silver);
}

/* ============ 通用章节元素 ============ */
.page-about .about-index {
  margin: 0 0 0.7rem;
  font-size: 0.76rem;
  letter-spacing: 0.2em;
  color: var(--c-blue);
}

.page-about .about-h2 {
  margin: 0 0 1rem;
  font-size: clamp(1.45rem, 4.4vw, 2.35rem);
  line-height: 1.26;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.page-about .about-h2--onDark {
  color: var(--c-paper);
}

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

.page-about .figure__frame {
  overflow: hidden;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-l);
  background: #0E1522;
}

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

.page-about .figure__caption {
  margin-top: 0.7rem;
  font-size: 0.82rem;
  color: #5A6478;
}

.page-about .page-section--teal .figure__frame,
.page-about .page-section--indigo .figure__frame {
  border-color: var(--about-line-dark);
}

.page-about .page-section--teal .figure__caption {
  color: #B4D0CF;
}

.page-about .page-section--indigo .figure__caption {
  color: #C4C1E4;
}

/* ============ 01 品牌起点 ============ */
.page-about .about-origin {
  background: var(--c-paper);
  padding: 3.25rem 0;
}

.page-about .about-origin__grid {
  display: grid;
  gap: 2rem;
}

.page-about .about-origin__text p {
  margin: 0 0 1rem;
}

.page-about .about-points {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.page-about .about-points__item {
  position: relative;
  padding-left: 1.6rem;
  font-size: 0.94rem;
}

.page-about .about-points__dot {
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 0.6rem;
  height: 0.6rem;
  background: var(--c-orange);
  transform: rotate(45deg);
}

/* ============ 02 团队分工 ============ */
.page-about .about-team {
  background: var(--c-teal);
  color: var(--c-paper);
  padding: 3.25rem 0;
}

.page-about .about-team .about-index {
  color: var(--c-orange);
}

.page-about .about-team__head {
  max-width: 44rem;
}

.page-about .about-team__lede {
  margin: 0;
  color: #CFE0DF;
}

.page-about .about-team__body {
  display: grid;
  gap: 2rem;
  margin-top: 2.25rem;
}

.page-about .about-team__cards {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.page-about .team-card {
  background: var(--about-soft);
  border: 1px solid var(--about-line-dark);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-about .team-card[open] {
  background: rgba(244, 246, 250, 0.1);
  border-color: rgba(255, 122, 26, 0.55);
}

.page-about .team-card__summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.05rem;
  cursor: pointer;
  list-style: none;
}

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

.page-about .team-card__summary::after {
  content: "";
  flex: 0 0 auto;
  width: 0.5rem;
  height: 0.5rem;
  margin-left: 0.3rem;
  border-right: 2px solid var(--c-orange);
  border-bottom: 2px solid var(--c-orange);
  transform: rotate(45deg);
  transition: transform 0.25s var(--ease);
}

.page-about .team-card[open] .team-card__summary::after {
  transform: rotate(-135deg);
}

.page-about .team-card__role {
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--c-paper);
}

.page-about .team-card__role::before {
  content: "";
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--c-orange);
}

.page-about .team-card__count {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--c-orange);
  padding: 0.15rem 0.5rem;
  border: 1px dashed rgba(255, 122, 26, 0.6);
  border-radius: 999px;
}

.page-about .team-card__body {
  padding: 0 1.05rem 1.15rem;
  font-size: 0.93rem;
  color: #D3DCEC;
}

.page-about .team-card__body p {
  margin: 0;
}

/* ============ 03 内容体系 ============ */
.page-about .about-system {
  background: var(--c-indigo);
  color: var(--c-paper);
  padding: 3.25rem 0;
}

.page-about .about-system .about-index {
  color: var(--c-orange);
}

.page-about .about-system__head {
  max-width: 40rem;
}

.page-about .about-system__grid {
  display: grid;
  gap: 2rem;
  margin-top: 2rem;
}

.page-about .about-system__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.page-about .system-item {
  padding: 1.05rem 1.05rem 1.1rem 1.35rem;
  background: rgba(244, 246, 250, 0.07);
  border-radius: var(--radius-m);
  border-left: 3px solid var(--c-orange);
}

.page-about .system-item__no {
  margin: 0 0 0.3rem;
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  color: var(--c-orange);
}

.page-about .system-item__title {
  margin: 0 0 0.35rem;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--c-paper);
}

.page-about .system-item p {
  margin: 0;
  font-size: 0.92rem;
  color: #D6D3EE;
}

/* ============ 04 服务承诺 ============ */
.page-about .about-service {
  background: var(--c-paper);
  padding: 3.25rem 0;
}

.page-about .about-service__grid {
  display: grid;
  gap: 2rem;
}

.page-about .about-service__copy p {
  margin: 0 0 1rem;
}

.page-about .about-service__btn {
  margin-top: 0.6rem;
}

.page-about .about-service__cards {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.page-about .service-card {
  position: relative;
  padding: 1.25rem 1.2rem 1.25rem 1.45rem;
  background: #FFFFFF;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-card);
}

.page-about .service-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.25rem;
  bottom: 1.25rem;
  width: 4px;
  background: linear-gradient(180deg, var(--c-blue), var(--c-orange));
  border-radius: 0 4px 4px 0;
}

.page-about .service-card__title {
  margin: 0 0 0.4rem;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--c-graphite);
}

.page-about .service-card p {
  margin: 0;
  font-size: 0.92rem;
  color: #384252;
}

/* ============ 05 发展节奏 ============ */
.page-about .about-timeline {
  background: var(--c-ink);
  color: var(--c-paper);
  padding: 3.25rem 0;
}

.page-about .about-timeline .about-index {
  color: var(--c-orange);
}

.page-about .about-timeline__head {
  max-width: 44rem;
}

.page-about .about-timeline__list {
  position: relative;
  list-style: none;
  margin: 2.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 1.6rem;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0.75rem;
  width: 2px;
  margin-left: -1px;
  background: linear-gradient(180deg, var(--c-blue) 0%, var(--c-orange) 100%);
  opacity: 0.65;
  border-radius: 2px;
}

.page-about .tl-item {
  position: relative;
  padding-left: 2.5rem;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.35rem;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  background: var(--c-ink);
  border: 2px solid var(--c-orange);
}

.page-about .tl-item__badge {
  display: inline-block;
  margin-bottom: 0.5rem;
  padding: 0.15rem 0.55rem;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--c-orange);
  border: 1px solid rgba(255, 122, 26, 0.5);
  border-radius: 999px;
}

.page-about .tl-item__title {
  margin: 0 0 0.45rem;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--c-paper);
}

.page-about .tl-item p {
  margin: 0;
  font-size: 0.94rem;
  color: #C2CCDB;
}

/* ============ 06 协作生态 ============ */
.page-about .about-partners {
  background: var(--c-paper);
  padding: 3.25rem 0;
}

.page-about .about-partners__head {
  max-width: 44rem;
}

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

.page-about .about-partners__grid {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-about .partner-card {
  position: relative;
  padding: 1.7rem 1.2rem 1.25rem;
  background: #FFFFFF;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-card);
}

.page-about .partner-card::before {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  left: -1px;
  height: 4px;
  border-radius: var(--radius-m) var(--radius-m) 0 0;
  background: var(--c-blue);
}

.page-about .partner-card--orange::before {
  background: var(--c-orange);
}

.page-about .partner-card--green::before {
  background: var(--c-green);
}

.page-about .partner-card__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.9rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--c-graphite);
}

.page-about .partner-card__num small {
  margin-left: 0.25rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--c-blue);
}

.page-about .partner-card--orange .partner-card__num small {
  color: var(--c-orange);
}

.page-about .partner-card--green .partner-card__num small {
  color: #158C5D;
}

.page-about .partner-card__title {
  margin: 0.85rem 0 0.4rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-graphite);
}

.page-about .partner-card p {
  margin: 0;
  font-size: 0.9rem;
  color: #4A5468;
}

/* ============ 结尾行动区 ============ */
.page-about .about-cta {
  background: linear-gradient(120deg, var(--c-ink) 0%, #182238 58%, #0F4BD8 100%);
  color: var(--c-paper);
  padding: 2.75rem 0;
}

.page-about .about-cta__inner {
  display: grid;
  gap: 1.5rem;
}

.page-about .about-cta__title {
  margin: 0 0 0.55rem;
  font-size: clamp(1.3rem, 3.6vw, 1.95rem);
  line-height: 1.3;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.page-about .about-cta__text p {
  margin: 0;
  max-width: 44ch;
  font-size: 0.95rem;
  color: #D3DBE9;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.page-about .about-cta .btn--outline {
  background: transparent;
  border: 1px solid rgba(244, 246, 250, 0.45);
  color: var(--c-paper);
}

.page-about .about-cta .btn--outline:hover {
  border-color: var(--c-orange);
  color: var(--c-orange);
}

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

  .page-about .about-fact__num {
    font-size: 1.75rem;
  }

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

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

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 2.25rem 0 4.5rem;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(19rem, 0.85fr);
    align-items: end;
    gap: 3rem;
  }

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

  .page-about .about-origin {
    padding: 4.5rem 0;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: start;
    gap: 3rem;
  }

  .page-about .about-origin__figure {
    margin-top: 3.25rem;
  }

  .page-about .about-team,
  .page-about .about-system,
  .page-about .about-service,
  .page-about .about-timeline,
  .page-about .about-partners {
    padding: 4.5rem 0;
  }

  .page-about .about-team__body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.02fr);
    align-items: start;
    gap: 2.5rem;
  }

  .page-about .about-system__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.96fr);
    align-items: start;
    gap: 2.5rem;
  }

  .page-about .about-system__figure {
    margin-top: 2.25rem;
  }

  .page-about .about-service__grid {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    align-items: start;
    gap: 3rem;
  }

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

  /* 交错时间轴 */
  .page-about .about-timeline__list::before {
    left: 50%;
    margin-left: -1px;
  }

  .page-about .tl-item {
    width: 50%;
    padding-left: 0;
    padding-right: 3rem;
  }

  .page-about .tl-item:nth-child(even) {
    margin-left: 50%;
    padding-left: 3rem;
    padding-right: 0;
  }

  .page-about .tl-item::before {
    left: auto;
    right: -0.75rem;
    top: 0.4rem;
  }

  .page-about .tl-item:nth-child(even)::before {
    left: -0.75rem;
    right: auto;
  }

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

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 2.5rem;
  }
}

@media (min-width: 1100px) {
  .page-about .about-partners__grid {
    gap: 1.25rem;
  }

  .page-about .partner-card:nth-child(2) {
    margin-top: 1.6rem;
  }
}
<<<END>>>