.page-about {
  --about-gap: clamp(20px, 3.4vw, 44px);
  --about-r: 26px;
  --about-track: var(--cream);
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.78;
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  padding-top: clamp(16px, 2.4vw, 28px);
  font-size: 13px;
  color: var(--gray);
}
.page-about .breadcrumbs a {
  color: var(--navy-mid);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease);
}
.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible {
  border-bottom-color: currentColor;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(22px, 4vw, 46px) 0 clamp(26px, 4.4vw, 56px);
}
.page-about .about-hero__inner {
  display: grid;
  gap: clamp(14px, 2vw, 22px);
  align-content: start;
}
.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 6.2vw, 68px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--navy);
  max-width: 17ch;
}
.page-about .about-hero__title em {
  font-style: normal;
  color: var(--red);
  display: block;
}
.page-about .about-hero__lead {
  margin: 0;
  max-width: 46ch;
  font-size: clamp(15px, 1.55vw, 17px);
  line-height: 1.86;
  color: var(--gray);
}

.page-about .about-hero__stats {
  list-style: none;
  margin: clamp(6px, 1.4vw, 14px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.page-about .about-hero__stats li {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 14px 16px 12px;
  display: grid;
  gap: 2px;
  min-width: 0;
}
.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.8vw, 28px);
  font-weight: 700;
  line-height: 1.2;
  color: var(--red);
  letter-spacing: -0.01em;
}
.page-about .about-stat__label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--gray);
}

/* ---------- 章节通用 ---------- */
.page-about .about-chapter {
  padding: clamp(18px, 3vw, 38px) 0;
}
.page-about .about-chapter h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.4vw, 38px);
  line-height: 1.24;
  letter-spacing: -0.015em;
  color: var(--navy);
  max-width: 22ch;
}
.page-about .about-block p {
  margin: 0 0 14px;
  max-width: 40em;
  font-size: 16px;
}
.page-about .about-block p:last-child {
  margin-bottom: 0;
}
.page-about .about-chapter__lead {
  margin: 0 0 clamp(16px, 2.4vw, 26px);
  max-width: 44em;
  font-size: 16px;
  color: var(--ink);
}
.page-about .about-chapter__foot {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  max-width: 46em;
  font-size: 14px;
  color: var(--gray);
}

/* ---------- 起点：主列 + 侧注 ---------- */
.page-about .split {
  gap: clamp(18px, 3vw, 40px);
  align-items: start;
}
.page-about .about-aside {
  background: linear-gradient(160deg, var(--mist) 0%, var(--white) 88%);
  border-radius: var(--about-r);
  padding: 22px 22px 20px;
  border: 1px solid var(--line);
}
.page-about .about-aside__kicker {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--navy-mid);
}
.page-about .about-aside p {
  margin: 0 0 12px;
  font-size: 15px;
  color: var(--ink);
}
.page-about .about-aside__meta {
  margin: 0;
  font-size: 12px;
  color: var(--gray);
  padding-top: 10px;
  border-top: 1px dashed var(--line);
}

/* ---------- 配图 ---------- */
.page-about .about-figure {
  margin: 0 0 clamp(18px, 2.6vw, 28px);
  border-radius: var(--about-r);
  overflow: hidden;
  background: var(--mist);
  border: 1px solid var(--line);
}
.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}
.page-about .about-figure--wide {
  margin-top: clamp(14px, 2vw, 22px);
}

/* ---------- 团队分支 ---------- */
.page-about .branches {
  position: relative;
  padding-left: 18px;
  display: grid;
  gap: 12px;
}
.page-about .branches::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 28px;
  bottom: 28px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--green), var(--mist));
}
.page-about .branch {
  position: relative;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--about-r);
  overflow: hidden;
  transition: box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-about .branch::before {
  content: "";
  position: absolute;
  left: -18px;
  top: 32px;
  width: 18px;
  height: 2px;
  background: var(--mist);
}
.page-about .branch[open] {
  border-color: rgba(29, 78, 121, 0.28);
  box-shadow: 0 16px 34px -28px rgba(14, 42, 71, 0.55);
}
.page-about .branch__head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  position: relative;
}
.page-about .branch__head::-webkit-details-marker {
  display: none;
}
.page-about .branch__count {
  flex: 0 0 auto;
  min-width: 40px;
  text-align: center;
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
  background: var(--red);
  border-radius: var(--r-pill);
  padding: 4px 12px;
}
.page-about .branch__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  color: var(--navy);
}
.page-about .branch__hint {
  font-size: 12px;
  color: var(--gray);
  margin-left: auto;
}
.page-about .branch__head::after {
  content: "";
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--navy-mid);
  border-bottom: 2px solid var(--navy-mid);
  transform: rotate(45deg) translateY(-2px);
  transition: transform var(--dur) var(--ease);
}
.page-about .branch[open] .branch__head::after {
  transform: rotate(-135deg) translateY(-1px);
}
.page-about .branch__body {
  padding: 0 18px 18px;
}
.page-about .branch__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-about .branch__list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  color: var(--ink);
  line-height: 1.72;
}
.page-about .branch__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
}

/* ---------- 三步流程 ---------- */
.page-about .about-block--offset {
  max-width: 100%;
}
.page-about .flow {
  list-style: none;
  margin: clamp(14px, 2vw, 22px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.page-about .flow__step {
  position: relative;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--about-r);
  padding: 20px 20px 18px;
}
.page-about .flow__idx {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--navy-mid);
  background: var(--mist);
  border-radius: var(--r-pill);
  padding: 3px 12px;
  margin-bottom: 12px;
}
.page-about .flow__step h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  color: var(--navy);
}
.page-about .flow__step p {
  margin: 0 0 10px;
  font-size: 15px;
  color: var(--ink);
}
.page-about .flow__out {
  margin: 0;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  color: var(--gray);
}
.page-about .flow__out-key {
  display: inline-block;
  margin-right: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--red);
  background: var(--red-soft);
  border-radius: var(--r-pill);
  padding: 2px 9px;
}

/* ---------- 时间线 ---------- */
.page-about .journey {
  position: relative;
  list-style: none;
  margin: clamp(16px, 2.4vw, 26px) 0 0;
  padding: 0 0 0 34px;
}
.page-about .journey::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--green) 0%, var(--mist) 52%, var(--red) 100%);
}
.page-about .journey__item {
  position: relative;
  padding-bottom: clamp(24px, 3vw, 34px);
}
.page-about .journey__item:last-child {
  padding-bottom: 0;
}
.page-about .journey__dot {
  position: absolute;
  left: -34px;
  top: 6px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--green);
  border: 4px solid var(--about-track);
  box-shadow: 0 0 0 1px var(--line);
}
.page-about .journey__dot--now {
  background: var(--red);
  box-shadow: 0 0 0 1px rgba(200, 16, 46, 0.35), 0 0 0 7px rgba(200, 16, 46, 0.1);
}
.page-about .journey__stage {
  margin: 0 0 5px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--navy-mid);
}
.page-about .journey__body h3 {
  margin: 0 0 7px;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 700;
  color: var(--navy);
}
.page-about .journey__body p {
  margin: 0;
  max-width: 42em;
  font-size: 15px;
  color: var(--ink);
}
.page-about .journey__note {
  display: inline-block;
  margin-top: 10px;
  padding: 3px 13px;
  border-radius: var(--r-pill);
  background: var(--mist);
  color: var(--gray);
  font-size: 12px;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease), opacity var(--dur) var(--ease);
  opacity: 0.78;
}
.page-about .journey__item:hover .journey__note,
.page-about .journey__item:focus-within .journey__note {
  background: var(--red-soft);
  color: var(--red-deep);
  opacity: 1;
}

/* ---------- 伙伴与资质双卡 ---------- */
.page-about .about-pair {
  display: grid;
  gap: 14px;
  margin-top: clamp(16px, 2.4vw, 26px);
}
.page-about .about-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--about-r);
  padding: clamp(20px, 2.6vw, 28px);
  display: grid;
  gap: 10px;
  align-content: start;
}
.page-about .about-card--navy {
  background: var(--navy);
  border-color: var(--navy);
  color: var(--white);
}
.page-about .about-card--navy h3,
.page-about .about-card--navy .about-card__num {
  color: var(--white);
}
.page-about .about-card--navy p {
  color: rgba(255, 255, 255, 0.82);
}
.page-about .about-card--navy .about-card__tag {
  color: rgba(255, 255, 255, 0.66);
  border-top-color: rgba(255, 255, 255, 0.2);
}
.page-about .about-card__num {
  margin: 0;
  font-size: clamp(34px, 5vw, 48px);
  font-weight: 700;
  line-height: 1;
  color: var(--red);
  letter-spacing: -0.03em;
}
.page-about .about-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--navy);
}
.page-about .about-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
}
.page-about .about-card__tag {
  margin: 4px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gray);
}

.page-about .about-pair--tight {
  gap: 12px;
}
.page-about .about-credential {
  background: var(--white);
  border: 1px solid var(--line);
  border-left: 4px solid var(--green);
  border-radius: var(--r-md);
  padding: 20px 22px;
  display: grid;
  gap: 6px;
  align-content: start;
}
.page-about .about-credential:nth-child(2) {
  border-left-color: var(--red);
}
.page-about .about-credential__num {
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--navy);
}
.page-about .about-credential h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--navy);
}
.page-about .about-credential p {
  margin: 0;
  font-size: 14px;
  color: var(--gray);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding: clamp(26px, 4vw, 50px) 0 clamp(36px, 5vw, 70px);
}
.page-about .about-cta__inner {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 100%);
  border-radius: var(--r-xl);
  padding: clamp(24px, 4vw, 48px);
  display: grid;
  gap: clamp(18px, 2.6vw, 28px);
  align-items: center;
}
.page-about .about-cta__text h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.2vw, 32px);
  line-height: 1.26;
  color: var(--white);
}
.page-about .about-cta__text p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.82);
  max-width: 42em;
}
.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.page-about .about-cta__links .pill-link {
  align-self: center;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
  }
  .page-about .about-pair--tight {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .branch__head {
    padding: 18px 22px;
  }
  .page-about .branch__body {
    padding: 0 22px 20px;
  }
}

@media (min-width: 768px) {
  .page-about .about-figure img {
    max-height: 420px;
  }
  .page-about .flow {
    gap: 18px;
  }
}

@media (min-width: 900px) {
  .page-about .about-pair {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }
  .page-about .flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }
  .page-about .flow__step {
    padding: 22px 22px 20px;
  }
  .page-about .flow__step::after {
    content: "";
    position: absolute;
    right: -22px;
    top: 52px;
    width: 22px;
    height: 2px;
    background: repeating-linear-gradient(90deg, var(--navy-mid) 0 4px, transparent 4px 9px);
    opacity: 0.5;
  }
  .page-about .flow__step:last-child::after {
    display: none;
  }
  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  }
  .page-about .about-cta__links {
    justify-content: flex-end;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding-top: clamp(30px, 4vw, 54px);
  }
  .page-about .about-hero__lead {
    margin-top: 4px;
  }
  .page-about .about-block--offset {
    max-width: 66%;
    margin-left: auto;
    padding-right: 8px;
  }
  .page-about .journey {
    padding-left: 42px;
  }
  .page-about .journey__dot {
    left: -42px;
  }
  .page-about .journey::before {
    left: 11px;
  }
}

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