.page-about {
  --about-pad: clamp(52px, 9vw, 108px);
  --about-gap: clamp(26px, 4.5vw, 60px);
  background: var(--mm-rock);
  color: var(--mm-fog);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbbar {
  background: var(--mm-rock);
  padding: calc(var(--about-pad) * 0.34) 0 0;
}
.page-about .about-crumbbar .mm-crumbs {
  font-size: 0.82rem;
  color: var(--mm-stone);
  letter-spacing: 0.02em;
}
.page-about .about-crumbbar .mm-crumbs a {
  color: rgba(242, 240, 234, 0.62);
  text-decoration: none;
  transition: color 0.2s var(--mm-ease);
}
.page-about .about-crumbbar .mm-crumbs a:hover,
.page-about .about-crumbbar .mm-crumbs a:focus-visible {
  color: var(--mm-fog);
}
.page-about .about-crumbbar .mm-crumbs__sep {
  color: var(--mm-tundra);
  margin: 0 0.5em;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: calc(var(--about-pad) * 0.7) 0 var(--about-pad);
  background:
    radial-gradient(115% 78% at 88% 6%, rgba(111, 139, 98, 0.3), transparent 62%),
    radial-gradient(78% 58% at 6% 96%, rgba(143, 199, 217, 0.13), transparent 66%),
    var(--mm-rock);
}
.page-about .about-hero__inner {
  display: grid;
  gap: var(--about-gap);
  align-items: center;
}
.page-about .about-hero__copy .mm-eyebrow {
  color: var(--mm-tundra);
}
.page-about .about-hero h1 {
  font-family: var(--mm-font-display);
  font-size: clamp(2.2rem, 7vw, 4.4rem);
  line-height: 1.1;
  letter-spacing: 0.035em;
  margin: 0.32em 0 0;
  color: var(--mm-fog);
  text-wrap: balance;
}
.page-about .about-hero__lede {
  margin: 1.1em 0 0;
  max-width: 44ch;
  font-size: clamp(1rem, 2.2vw, 1.08rem);
  line-height: 1.78;
  color: rgba(242, 240, 234, 0.8);
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 1.6em;
}
.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 2.2em;
  margin: var(--about-gap) 0 0;
  padding: var(--about-gap) 0 0;
  list-style: none;
  border-top: 1px solid var(--mm-line);
}
.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.page-about .about-hero__fact-k {
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  color: rgba(242, 240, 234, 0.5);
}
.page-about .about-hero__facts .mm-num {
  font-family: var(--mm-font-mono);
  font-size: clamp(1.5rem, 3.4vw, 2rem);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--mm-ice);
  line-height: 1;
}
.page-about .about-hero__media {
  border-radius: 72px 18px 72px 18px;
  overflow: hidden;
  border: 1px solid var(--mm-line);
  background: var(--mm-rock-2);
  min-height: 220px;
}
.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 7 / 5;
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: 1.06fr 0.94fr;
    gap: clamp(36px, 5vw, 76px);
  }
}

/* ---------- 通用版块壳 ---------- */
.page-about .about-sec {
  padding: var(--about-pad) 0;
  background: var(--mm-fog);
  color: var(--mm-char);
}
.page-about .about-sec--dark {
  background: var(--mm-rock);
  color: var(--mm-fog);
}
.page-about .about-sec__head {
  max-width: 62ch;
}
.page-about .about-sec__head .mm-eyebrow {
  color: var(--mm-tundra-deep);
}
.page-about .about-sec--dark .about-sec__head .mm-eyebrow {
  color: var(--mm-tundra);
}
.page-about .about-sec__head h2 {
  font-family: var(--mm-font-display);
  font-size: clamp(1.65rem, 4.2vw, 2.75rem);
  line-height: 1.16;
  letter-spacing: 0.03em;
  margin: 0.4em 0 0;
  text-wrap: balance;
}
.page-about .about-sec__lede {
  margin: 1em 0 0;
  font-size: clamp(0.98rem, 2vw, 1.05rem);
  line-height: 1.78;
  color: rgba(16, 21, 21, 0.74);
}
.page-about .about-sec--dark .about-sec__lede {
  color: rgba(242, 240, 234, 0.72);
}

/* ---------- 五类内容 ---------- */
.page-about .about-svc-list {
  display: grid;
  gap: clamp(12px, 2vw, 20px);
  margin: var(--about-gap) 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-svc {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid rgba(16, 21, 21, 0.13);
  border-radius: var(--mm-radius);
  background: rgba(255, 255, 255, 0.52);
  transition: border-color 0.24s var(--mm-ease), transform 0.24s var(--mm-ease);
}
.page-about .about-svc:hover {
  border-color: var(--mm-tundra);
  transform: translateY(-3px);
}
.page-about .about-svc__num {
  font-family: var(--mm-font-mono);
  font-size: 0.86rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--mm-tundra-deep);
  padding-top: 3px;
}
.page-about .about-svc__body h3 {
  font-family: var(--mm-font-display);
  font-size: clamp(1.1rem, 2.4vw, 1.32rem);
  letter-spacing: 0.03em;
  margin: 0;
}
.page-about .about-svc__body p {
  margin: 0.6em 0 0;
  font-size: 0.96rem;
  line-height: 1.75;
  color: rgba(16, 21, 21, 0.76);
}
.page-about .about-services__more {
  margin: var(--about-gap) 0 0;
  font-size: 0.95rem;
  line-height: 1.7;
  color: rgba(16, 21, 21, 0.7);
}
.page-about .about-services__more a {
  color: var(--mm-tundra-deep);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}
.page-about .about-services__more a:hover {
  color: var(--mm-lava);
}

@media (min-width: 760px) {
  .page-about .about-svc-list {
    grid-template-columns: repeat(6, 1fr);
  }
  .page-about .about-svc:nth-child(1),
  .page-about .about-svc:nth-child(2) {
    grid-column: span 3;
  }
  .page-about .about-svc:nth-child(3),
  .page-about .about-svc:nth-child(4),
  .page-about .about-svc:nth-child(5) {
    grid-column: span 2;
  }
}

/* ---------- 历程 ---------- */
.page-about .about-timeline {
  background: var(--mm-fog);
  border-top: 1px solid rgba(16, 21, 21, 0.09);
}
.page-about .about-timeline__banner {
  margin: var(--about-gap) 0 0;
  border-radius: var(--mm-radius);
  overflow: hidden;
  border: 1px solid rgba(16, 21, 21, 0.12);
  background: var(--mm-stone);
}
.page-about .about-timeline__banner img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 2 / 1;
}
.page-about .about-tl {
  display: grid;
  gap: var(--about-gap);
  margin-top: var(--about-gap);
}
.page-about .about-tl__rail {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: thin;
}
.page-about .about-tl__link {
  flex: 0 0 auto;
  font-family: var(--mm-font-mono);
  font-size: 0.92rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
  color: rgba(16, 21, 21, 0.46);
  text-decoration: none;
  padding: 7px 13px;
  border-radius: 999px;
  border: 1px solid rgba(16, 21, 21, 0.14);
  transition: color 0.18s var(--mm-ease), background 0.18s var(--mm-ease), border-color 0.18s var(--mm-ease);
}
.page-about .about-tl__link:hover,
.page-about .about-tl__link:focus-visible {
  color: var(--mm-char);
  border-color: var(--mm-tundra);
}
.page-about .about-tl__link.is-active {
  color: var(--mm-fog);
  background: var(--mm-tundra-deep);
  border-color: var(--mm-tundra-deep);
}
.page-about .about-tl__list {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-tl__item {
  display: grid;
  gap: 10px;
  padding: clamp(22px, 3.2vw, 34px) 0;
  border-top: 1px solid rgba(16, 21, 21, 0.13);
}
.page-about .about-tl__item:first-child {
  border-top: 0;
  padding-top: 0;
}
.page-about .about-tl__year {
  font-family: var(--mm-font-mono);
  font-size: clamp(2rem, 6.5vw, 3.1rem);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
  line-height: 1;
  color: var(--mm-tundra);
}
.page-about .about-tl__body h3 {
  font-family: var(--mm-font-display);
  font-size: clamp(1.1rem, 2.6vw, 1.35rem);
  letter-spacing: 0.03em;
  margin: 0;
}
.page-about .about-tl__body p {
  margin: 0.65em 0 0;
  font-size: 0.96rem;
  line-height: 1.78;
  color: rgba(16, 21, 21, 0.75);
  max-width: 58ch;
}

@media (min-width: 900px) {
  .page-about .about-tl {
    grid-template-columns: 148px minmax(0, 1fr);
    gap: clamp(30px, 4vw, 64px);
  }
  .page-about .about-tl__rail {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
    position: sticky;
    top: 104px;
    align-self: start;
  }
  .page-about .about-tl__link {
    border: 0;
    border-left: 2px solid rgba(16, 21, 21, 0.13);
    border-radius: 0;
    padding: 10px 0 10px 14px;
    font-size: 1rem;
  }
  .page-about .about-tl__link:hover,
  .page-about .about-tl__link:focus-visible {
    border-left-color: var(--mm-tundra);
  }
  .page-about .about-tl__link.is-active {
    background: transparent;
    color: var(--mm-char);
    border-left-color: var(--mm-lava);
  }
  .page-about .about-tl__item {
    grid-template-columns: 148px minmax(0, 1fr);
    gap: 0 clamp(20px, 3vw, 44px);
    align-items: start;
  }
  .page-about .about-tl__year {
    position: sticky;
    top: 104px;
  }
}

/* ---------- 协作流程 ---------- */
.page-about .about-flow {
  background:
    radial-gradient(90% 60% at 12% 0%, rgba(111, 139, 98, 0.22), transparent 62%),
    var(--mm-rock);
}
.page-about .about-steps {
  display: grid;
  gap: clamp(14px, 2vw, 22px);
  margin: var(--about-gap) 0 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}
.page-about .about-steps__item {
  position: relative;
  padding: clamp(20px, 3vw, 28px);
  border-radius: var(--mm-radius);
  background: var(--mm-rock-2);
  border: 1px solid var(--mm-line);
}
.page-about .about-steps__item::after {
  content: "";
  position: absolute;
  right: 22px;
  top: 22px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--mm-ice);
  opacity: 0.65;
}
.page-about .about-steps__num {
  font-family: var(--mm-font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.08em;
  color: var(--mm-ice);
}
.page-about .about-steps__item h3 {
  font-family: var(--mm-font-display);
  font-size: 1.08rem;
  letter-spacing: 0.03em;
  margin: 0.5em 0 0;
  color: var(--mm-fog);
}
.page-about .about-steps__item p {
  margin: 0.6em 0 0;
  font-size: 0.94rem;
  line-height: 1.76;
  color: rgba(242, 240, 234, 0.72);
}

@media (min-width: 720px) {
  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (min-width: 1080px) {
  .page-about .about-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 覆盖与合作 ---------- */
.page-about .about-cover {
  padding-top: 0;
  background:
    radial-gradient(80% 55% at 78% 40%, rgba(143, 199, 217, 0.14), transparent 66%),
    var(--mm-rock);
}
.page-about .about-cover__grid {
  display: grid;
  gap: var(--about-gap);
  align-items: center;
  border-top: 1px solid var(--mm-line);
  padding-top: var(--about-pad);
}
.page-about .about-cover__copy .mm-eyebrow {
  color: var(--mm-tundra);
}
.page-about .about-cover__copy h2 {
  font-family: var(--mm-font-display);
  font-size: clamp(1.65rem, 4.2vw, 2.7rem);
  line-height: 1.16;
  letter-spacing: 0.03em;
  margin: 0.42em 0 0;
  text-wrap: balance;
}
.page-about .about-cover__copy > p {
  margin: 1em 0 0;
  max-width: 48ch;
  font-size: 0.98rem;
  line-height: 1.8;
  color: rgba(242, 240, 234, 0.74);
}
.page-about .about-cover__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 28px;
  margin: var(--about-gap) 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-cover__stats li {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 96px;
  padding-left: 14px;
  border-left: 2px solid var(--mm-tundra);
}
.page-about .about-cover__stats .mm-num {
  font-family: var(--mm-font-mono);
  font-size: clamp(1.5rem, 4vw, 2.1rem);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  line-height: 1;
  color: var(--mm-aurora);
}
.page-about .about-cover__stats span {
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: rgba(242, 240, 234, 0.6);
}
.page-about .about-cover__note {
  margin: 1.1em 0 0 !important;
  font-size: 0.9rem !important;
  padding-top: 1em;
  border-top: 1px dashed var(--mm-line-strong);
  color: rgba(242, 240, 234, 0.62) !important;
}
.page-about .about-cover__media {
  border-radius: 18px 64px 18px 64px;
  overflow: hidden;
  border: 1px solid var(--mm-line);
  background: var(--mm-rock-2);
}
.page-about .about-cover__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

@media (min-width: 880px) {
  .page-about .about-cover__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
    gap: clamp(36px, 5vw, 72px);
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--mm-fog);
}
.page-about .about-team__grid {
  display: grid;
  gap: clamp(14px, 2vw, 22px);
  margin-top: var(--about-gap);
}
.page-about .about-team__card {
  border: 1px solid rgba(16, 21, 21, 0.14);
  border-radius: var(--mm-radius);
  background: rgba(255, 255, 255, 0.58);
  overflow: hidden;
}
.page-about .about-team__card summary {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px 16px;
  padding: clamp(18px, 2.6vw, 26px);
  cursor: pointer;
  list-style: none;
}
.page-about .about-team__card summary::-webkit-details-marker {
  display: none;
}
.page-about .about-team__card summary:focus-visible {
  outline: 2px solid var(--mm-tundra-deep);
  outline-offset: -3px;
}
.page-about .about-team__count {
  font-family: var(--mm-font-mono);
  font-size: clamp(1.9rem, 5vw, 2.6rem);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  line-height: 1;
  color: var(--mm-tundra-deep);
}
.page-about .about-team__name {
  font-family: var(--mm-font-display);
  font-size: clamp(1.05rem, 2.4vw, 1.24rem);
  letter-spacing: 0.03em;
  color: var(--mm-char);
}
.page-about .about-team__hint {
  margin-left: auto;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: rgba(16, 21, 21, 0.42);
}
.page-about .about-team__card[open] .about-team__hint {
  color: var(--mm-lava);
}
.page-about .about-team__card[open] .about-team__hint::after {
  content: "内容已展开";
}
.page-about .about-team__card:not([open]) .about-team__hint::after {
  content: "点开看细节";
}
.page-about .about-team__hint::after {
  content: "";
}
.page-about .about-team__body {
  padding: 0 clamp(18px, 2.6vw, 26px) clamp(20px, 2.8vw, 28px);
  border-top: 1px solid rgba(16, 21, 21, 0.1);
  padding-top: clamp(16px, 2.4vw, 22px);
}
.page-about .about-team__body p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.78;
  color: rgba(16, 21, 21, 0.76);
}
.page-about .about-team__body ul {
  margin: 0.9em 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}
.page-about .about-team__body li {
  position: relative;
  padding-left: 18px;
  font-size: 0.92rem;
  line-height: 1.7;
  color: rgba(16, 21, 21, 0.68);
}
.page-about .about-team__body li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 2px;
  background: var(--mm-tundra);
}

@media (min-width: 820px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }
}

/* ---------- 四个理由 ---------- */
.page-about .about-why {
  background: var(--mm-fog);
  border-top: 1px solid rgba(16, 21, 21, 0.09);
}
.page-about .about-why__list {
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
  margin: var(--about-gap) 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-why__item {
  padding: clamp(20px, 3vw, 28px) 0 0;
  border-top: 2px solid rgba(16, 21, 21, 0.14);
}
.page-about .about-why__num {
  font-family: var(--mm-font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.1em;
  color: var(--mm-lava);
}
.page-about .about-why__item h3 {
  font-family: var(--mm-font-display);
  font-size: clamp(1.06rem, 2.4vw, 1.26rem);
  letter-spacing: 0.03em;
  margin: 0.55em 0 0;
}
.page-about .about-why__item p {
  margin: 0.55em 0 0;
  font-size: 0.94rem;
  line-height: 1.76;
  color: rgba(16, 21, 21, 0.72);
}

@media (min-width: 700px) {
  .page-about .about-why__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(20px, 3vw, 36px) clamp(24px, 4vw, 52px);
  }
}

/* ---------- 收束区 ---------- */
.page-about .about-cta {
  padding: var(--about-pad) 0;
  background:
    radial-gradient(90% 80% at 82% 30%, rgba(111, 139, 98, 0.32), transparent 66%),
    var(--mm-rock);
  color: var(--mm-fog);
}
.page-about .about-cta__inner {
  display: grid;
  gap: var(--about-gap);
  align-items: center;
}
.page-about .about-cta__copy h2 {
  font-family: var(--mm-font-display);
  font-size: clamp(1.6rem, 4.2vw, 2.6rem);
  line-height: 1.18;
  letter-spacing: 0.03em;
  margin: 0;
  text-wrap: balance;
}
.page-about .about-cta__copy p {
  margin: 1em 0 0;
  max-width: 52ch;
  font-size: 0.98rem;
  line-height: 1.78;
  color: rgba(242, 240, 234, 0.76);
}
.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 820px) {
  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: clamp(32px, 5vw, 64px);
  }
}
<<<END>>>