.page-about {
  --ab-side-w: 236px;
  --ab-gap: 48px;
  --ab-soft: rgba(30, 28, 32, .72);
}

/* ============ 首屏 ============ */
.page-about .ab-top {
  padding: 20px 0 44px;
  background:
    linear-gradient(180deg, rgba(244, 214, 219, .6) 0%, rgba(245, 241, 234, 0) 68%);
}

.page-about .ab-top__grid {
  display: grid;
  gap: 32px;
  margin-top: 26px;
}

.page-about .ab-top__lead .ms-eyebrow {
  margin: 0;
}

.page-about .ab-top h1 {
  margin: 12px 0 0;
  font-size: clamp(30px, 7.4vw, 54px);
  line-height: 1.14;
  letter-spacing: -.02em;
  max-width: 20ch;
}

.page-about .ab-top__lead .ms-lead {
  margin: 18px 0 0;
  font-size: 17px;
  line-height: 1.8;
  color: var(--ms-soft);
  max-width: 46ch;
}

.page-about .ab-top__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .ab-top__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ms-line);
  border: 1px solid var(--ms-line);
  border-radius: var(--ms-r);
  overflow: hidden;
}

.page-about .ab-top__stat {
  background: var(--ms-paper);
  padding: 16px 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .ab-top__num {
  font-family: var(--ms-mono);
  font-weight: 700;
  font-size: 27px;
  line-height: 1;
  letter-spacing: -.01em;
  color: var(--ms-red);
}

.page-about .ab-top__stat:nth-child(even) .ab-top__num {
  color: var(--ms-blue);
}

.page-about .ab-top__cap {
  font-size: 13px;
  line-height: 1.5;
  color: var(--ms-gray);
}

/* ============ 侧栏 + 正文 ============ */
.page-about .ab-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding-bottom: 72px;
}

.page-about .ab-side {
  border-left: 3px solid var(--ms-line-strong);
  padding-left: 14px;
}

.page-about .ab-side__note {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ms-gray);
}

.page-about .ab-side__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-about .ab-side__list::-webkit-scrollbar {
  display: none;
}

.page-about .ab-side__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: var(--ms-pill);
  font-size: 14px;
  color: var(--ms-gray);
  text-decoration: none;
  white-space: nowrap;
  transition: background-color .22s ease, color .22s ease;
}

.page-about .ab-side__num {
  font-family: var(--ms-mono);
  font-weight: 700;
  font-size: 12px;
  opacity: .75;
}

.page-about .ab-side__link:hover {
  color: var(--ms-ink);
  background: rgba(30, 28, 32, .06);
}

.page-about .ab-side__link:focus-visible {
  outline: 2px solid var(--ms-blue);
  outline-offset: 2px;
}

.page-about .ab-side__link.is-active {
  background: var(--ms-rose);
  color: var(--ms-red-deep);
  font-weight: 700;
}

/* ============ 章节通用 ============ */
.page-about .ab-sec {
  padding-top: 36px;
  scroll-margin-top: 96px;
}

.page-about .ab-sec + .ab-sec {
  margin-top: 40px;
  border-top: 1px solid var(--ms-line);
}

.page-about .ab-sec__head {
  position: relative;
  padding-left: 18px;
  margin-bottom: 18px;
}

.page-about .ab-sec__head::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 3px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--ms-red) 0%, var(--ms-gold) 100%);
}

.page-about .ab-sec__num {
  display: block;
  margin: 0;
  font-family: var(--ms-mono);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--ms-red);
}

.page-about .ab-sec__title {
  margin: 6px 0 0;
  font-size: clamp(22px, 4.6vw, 32px);
  line-height: 1.2;
  letter-spacing: -.02em;
  font-weight: 800;
}

.page-about .ab-sec__sum {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ms-gray);
  max-width: 54ch;
}

.page-about .ab-sec__body p {
  margin: 0 0 16px;
  font-size: 17px;
  line-height: 1.85;
  color: var(--ms-ink);
  max-width: 64ch;
}

.page-about .ab-sec__body > p:last-child {
  margin-bottom: 0;
}

.page-about .ab-sec__body a {
  color: var(--ms-red-deep);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ============ 02 生产流程 ============ */
.page-about .ab-flow__track {
  display: none;
  color: rgba(200, 16, 46, .5);
  margin-bottom: 22px;
}

.page-about .ab-flow__svg {
  display: block;
  width: 100%;
  height: 20px;
}

.page-about .ab-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 22px;
}

.page-about .ab-flow__step {
  padding-top: 16px;
  border-top: 2px solid var(--ms-line-strong);
}

.page-about .ab-flow__num {
  display: block;
  font-family: var(--ms-mono);
  font-weight: 700;
  font-size: 30px;
  line-height: 1;
  color: rgba(200, 16, 46, .3);
  margin-bottom: 10px;
}

.page-about .ab-flow__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 8px;
}

.page-about .ab-flow__title {
  margin: 0;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -.01em;
}

.page-about .ab-flow__text {
  margin: 0 !important;
  font-size: 15px !important;
  line-height: 1.75 !important;
  color: var(--ms-soft);
  max-width: none !important;
}

/* ============ 03 团队 ============ */
.page-about .ab-team {
  display: grid;
  gap: 26px;
}

.page-about .ab-team__seg {
  min-width: 0;
}

.page-about .ab-team__seg .ms-seg__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.page-about .ab-team__seg .ms-seg__label {
  padding: 9px 18px;
  font-size: 14px;
  font-weight: 700;
  border: 1px solid var(--ms-line-strong);
  border-radius: var(--ms-pill);
  cursor: pointer;
  transition: background-color .22s ease, border-color .22s ease, color .22s ease;
}

.page-about .ab-team__seg .ms-seg__panel {
  min-height: 172px;
  padding: 20px 20px 22px;
  background: var(--ms-white);
  border: 1px solid var(--ms-line);
  border-radius: var(--ms-r-sm);
}

.page-about .ab-team__role {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 0 0 4px;
}

.page-about .ab-team__count {
  font-family: var(--ms-mono);
  font-weight: 700;
  font-size: 34px;
  line-height: 1;
  color: var(--ms-red);
}

.page-about .ab-team__unit {
  font-size: 14px;
  color: var(--ms-gray);
}

.page-about .ab-team__role-name {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 800;
}

.page-about .ab-team__text {
  margin: 0 !important;
  font-size: 15px !important;
  line-height: 1.78 !important;
  color: var(--ms-soft);
  max-width: none !important;
}

.page-about .ab-team__fig {
  margin: 0;
}

/* ============ 04 年份带 ============ */
.page-about .ab-years__band {
  position: relative;
  margin-top: 22px;
  padding: 36px 22px 38px;
  border-radius: var(--ms-r);
  overflow: hidden;
  background: var(--ms-black);
  color: var(--ms-paper);
}

.page-about .ab-years__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .16;
  pointer-events: none;
}

.page-about .ab-years__band::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(118deg, rgba(18, 16, 15, .92) 8%, rgba(18, 16, 15, .55) 62%, rgba(200, 16, 46, .34) 100%);
  pointer-events: none;
}

.page-about .ab-years__list {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 26px;
}

.page-about .ab-years__item {
  scroll-margin-top: 96px;
}

.page-about .ab-years__time {
  margin: 0;
  font-family: var(--ms-mono);
  font-weight: 700;
  font-size: clamp(28px, 6.2vw, 38px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--ms-gold);
}

.page-about .ab-years__tick {
  display: block;
  width: 100%;
  height: 1px;
  margin: 12px 0 12px;
  background: rgba(217, 162, 39, .45);
}

.page-about .ab-years__text {
  margin: 0 !important;
  font-size: 14.5px !important;
  line-height: 1.75 !important;
  color: rgba(245, 241, 234, .82);
  max-width: none !important;
}

/* ============ 05 上线前检查 ============ */
.page-about .ab-checks {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--ms-line);
}

.page-about .ab-checks__item {
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr);
  column-gap: 14px;
  padding: 18px 0 20px;
  border-bottom: 1px solid var(--ms-line);
}

.page-about .ab-checks__dot {
  grid-row: span 2;
  width: 12px;
  height: 12px;
  margin-top: 7px;
  border-radius: 50%;
}

.page-about .ab-checks__dot--red { background: var(--ms-red); }
.page-about .ab-checks__dot--blue { background: var(--ms-blue); }
.page-about .ab-checks__dot--gold { background: var(--ms-gold); }
.page-about .ab-checks__dot--green { background: var(--ms-green); }

.page-about .ab-checks__title {
  margin: 0 0 4px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -.01em;
}

.page-about .ab-checks__text {
  margin: 0 !important;
  font-size: 15px !important;
  line-height: 1.78 !important;
  color: var(--ms-soft);
  max-width: 60ch !important;
}

/* ============ 06 合作与认可 ============ */
.page-about .ab-partner {
  display: grid;
  gap: 26px;
}

.page-about .ab-partner__fig {
  margin: 0;
}

.page-about .ab-partner__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--ms-line);
}

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

.page-about .ab-partner__name {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -.01em;
}

.page-about .ab-partner__text {
  margin: 0 !important;
  font-size: 15px !important;
  line-height: 1.78 !important;
  color: var(--ms-soft);
  max-width: 58ch !important;
}

.page-about .ab-honor {
  margin-top: 24px;
  padding: 20px 22px 22px;
  border-radius: var(--ms-r-sm);
  background: var(--ms-black);
  color: var(--ms-paper);
}

.page-about .ab-honor__title {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--ms-gold);
}

.page-about .ab-honor__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-honor__item {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.page-about .ab-honor__year {
  flex: none;
  font-family: var(--ms-mono);
  font-weight: 700;
  font-size: 18px;
  color: var(--ms-gold);
}

.page-about .ab-honor__text {
  font-size: 15px;
  line-height: 1.7;
}

/* ============ 07 联系与备案 ============ */
.page-about .ab-contact__box {
  display: grid;
  gap: 24px;
  margin-top: 22px;
  padding: 26px 22px 28px;
  background: var(--ms-white);
  border: 1px solid var(--ms-line);
  border-left: 4px solid var(--ms-red);
  border-radius: var(--ms-r-sm);
}

.page-about .ab-contact__list {
  margin: 0;
  display: grid;
  gap: 14px;
}

.page-about .ab-contact__list > div {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
}

.page-about .ab-contact__list dt {
  font-size: 13px;
  color: var(--ms-gray);
}

.page-about .ab-contact__list dd {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.6;
  word-break: break-word;
}

.page-about .ab-contact__note {
  margin: 0 0 18px !important;
  font-size: 14.5px !important;
  line-height: 1.8 !important;
  color: var(--ms-soft);
  max-width: 40ch !important;
}

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

  .page-about .ab-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px 28px;
  }
}

@media (min-width: 900px) {
  .page-about .ab-top {
    padding: 28px 0 56px;
  }

  .page-about .ab-top__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
    align-items: end;
  }

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

  .page-about .ab-flow__track {
    display: block;
  }

  .page-about .ab-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
  }

  .page-about .ab-flow__step {
    padding: 16px 20px 0;
    border-top: 2px solid var(--ms-line-strong);
  }

  .page-about .ab-flow__step + .ab-flow__step {
    border-left: 1px solid var(--ms-line);
  }

  .page-about .ab-years__list {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0;
  }

  .page-about .ab-years__item {
    padding: 0 20px;
    border-left: 1px solid var(--ms-line-dark);
  }

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

  .page-about .ab-years__item:last-child {
    padding-right: 0;
  }

  .page-about .ab-partner {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .ab-contact__box {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 36px;
    padding: 30px 30px 32px;
  }
}

@media (min-width: 1024px) {
  .page-about .ab-layout {
    grid-template-columns: var(--ab-side-w) minmax(0, 1fr);
    gap: var(--ab-gap);
    align-items: start;
  }

  .page-about .ab-side {
    position: sticky;
    top: 96px;
    padding-left: 16px;
  }

  .page-about .ab-side__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
  }

  .page-about .ab-side__link {
    border-radius: 10px;
    white-space: normal;
    align-items: flex-start;
  }

  .page-about .ab-team {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .ab-team__seg .ms-seg__panel {
    min-height: 196px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-side__link,
  .page-about .ab-team__seg .ms-seg__label {
    transition: none;
  }
}
</main>

.page-about {
  --ms-soft: currentColor;
}