.page-about {
  --ab-body: #33454B;
  --ab-pad: 56px;
  display: block;
  background: var(--paper);
  color: var(--ink);
  overflow-x: clip;
}

/* ---------------- 首屏 ---------------- */
.page-about .about-hero {
  position: relative;
  padding: 20px 0 34px;
  background: var(--ink);
  color: var(--paper);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -14%;
  bottom: -32%;
  width: 80%;
  height: 86%;
  background: radial-gradient(circle at 62% 42%, rgba(31, 110, 140, 0.42), transparent 62%);
  pointer-events: none;
}

.page-about .about-hero > .wrap {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__crumb {
  margin: 0 0 18px;
}

.page-about .about-hero__crumb a {
  color: var(--lake-bright);
}

.page-about .about-hero__crumb li {
  color: var(--muted);
}

.page-about .about-hero__crumb [aria-current="page"] {
  color: #9EAFB5;
}

.page-about .about-hero__frame {
  position: relative;
  padding: 32px 20px 28px;
  background:
    linear-gradient(180deg, rgba(31, 110, 140, 0.22), rgba(11, 20, 24, 0) 72%),
    var(--slate);
  border: 1px solid var(--rail-line);
}

.page-about .about-hero__frame::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  right: -1px;
  height: 10px;
  background-image: repeating-linear-gradient(90deg, var(--lake-bright) 0 1px, transparent 1px 22px);
  opacity: 0.5;
}

.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  right: -1px;
  bottom: -1px;
  width: 34px;
  height: 34px;
  border-right: 3px solid var(--lake);
  border-bottom: 3px solid var(--lake);
}

.page-about .about-hero__label {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-about .about-hero__title {
  margin: 0 0 18px;
  font-size: clamp(29px, 8vw, 42px);
  line-height: 1.14;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero__lead {
  margin: 0 0 24px;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.78;
  color: #C3D0D5;
}

.page-about .about-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-hero__acts .btn--ghost {
  color: var(--paper);
  border-color: rgba(247, 246, 243, 0.34);
}

.page-about .about-hero__stats {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--rail-line);
  border: 1px solid var(--rail-line);
}

.page-about .about-hero__stats li {
  background: var(--slate);
  padding: 14px 14px 16px;
}

.page-about .about-hero__stats span {
  display: block;
  font-family: var(--font-mono);
  font-size: 23px;
  font-weight: 500;
  letter-spacing: 0.02em;
  line-height: 1.15;
  color: var(--lake-bright);
}

.page-about .about-hero__stats em {
  display: block;
  margin-top: 8px;
  font-style: normal;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

/* ---------------- 品牌主张 ---------------- */
.page-about .about-claim {
  background: var(--paper);
  padding: var(--ab-pad) 0;
}

.page-about .about-claim__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-claim__mark {
  border-left: 3px solid var(--lake);
  padding-left: 16px;
}

.page-about .about-claim__quote {
  margin: 0;
  font-size: clamp(27px, 8vw, 36px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.22;
  color: var(--ink);
}

.page-about .about-claim__since {
  margin: 12px 0 0;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ochre);
}

.page-about .about-claim__title {
  margin: 8px 0 14px;
  font-size: clamp(21px, 5.6vw, 29px);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.34;
  color: var(--ink);
}

.page-about .about-claim__body > p {
  margin: 0 0 20px;
  max-width: 66ch;
  font-size: 16px;
  line-height: 1.82;
  color: var(--ab-body);
}

.page-about .about-claim__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-claim__list li {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.page-about .about-claim__k {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--lake);
}

.page-about .about-claim__list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ab-body);
}

/* ---------------- 团队 ---------------- */
.page-about .about-team {
  background: var(--slate);
  color: var(--paper);
  padding: var(--ab-pad) 0;
}

.page-about .about-team .section__head {
  max-width: 74ch;
}

.page-about .about-team .section__label {
  color: var(--gold);
}

.page-about .about-team .section__title {
  margin: 8px 0 12px;
  color: var(--paper);
}

.page-about .about-team .section__lead {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: #AEBCC2;
}

.page-about .about-team__media {
  margin: 28px 0 0;
}

.page-about .about-team__media .media__frame {
  border: 1px solid var(--rail-line);
  background: var(--ink);
  overflow: hidden;
}

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

.page-about .about-team__media .media__cap {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-team__roster {
  margin-top: 30px;
  border-top: 1px solid var(--rail-line);
}

.page-about .about-team__roster .accordion__item {
  border-bottom: 1px solid var(--rail-line);
}

.page-about .about-team__role-head {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-about .about-team__roster .accordion__trigger {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 16px 4px;
  background: none;
  border: 0;
  font: inherit;
  color: inherit;
  text-align: left;
  cursor: pointer;
  transition: background-color 240ms var(--ease);
}

.page-about .about-team__roster .accordion__trigger:hover {
  background: rgba(31, 110, 140, 0.14);
}

.page-about .about-team__roster .accordion__index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ochre);
}

.page-about .about-team__role-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .about-team__role-num {
  font-size: 13px;
  color: var(--lake-bright);
}

.page-about .about-team__roster .accordion__mark {
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--lake-bright);
  border-bottom: 2px solid var(--lake-bright);
  transform: rotate(45deg);
  transition: transform 280ms var(--ease);
}

.page-about .about-team__roster .accordion__trigger[aria-expanded="true"] .accordion__mark {
  transform: rotate(-135deg);
}

.page-about .about-team__roster .accordion__panel {
  padding: 0 4px 20px;
}

.page-about .about-team__roster .accordion__body {
  padding-left: 14px;
  border-left: 2px solid var(--lake);
  font-size: 15px;
  line-height: 1.8;
  color: #AEBCC2;
}

.page-about .about-team__roster .accordion__body p {
  margin: 0;
  max-width: 68ch;
}

/* ---------------- 生产流程 ---------------- */
.page-about .about-flow {
  background: var(--paper);
  padding: var(--ab-pad) 0;
}

.page-about .about-flow .section__head {
  max-width: 72ch;
}

.page-about .about-flow .section__title {
  margin: 8px 0 12px;
}

.page-about .about-flow .section__lead {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ab-body);
}

.page-about .about-flow__steps {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-flow__step {
  position: relative;
  padding: 18px 0 20px 24px;
  border-left: 1px solid var(--line);
}

.page-about .about-flow__step::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 26px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--lake);
  transition: background-color 240ms var(--ease), border-color 240ms var(--ease);
}

.page-about .about-flow__step:hover::before {
  background: var(--lake);
  border-color: var(--lake);
}

.page-about .about-flow__idx {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ochre);
}

.page-about .about-flow__step h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-flow__step p {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ab-body);
}

.page-about .about-flow__note {
  margin: 26px 0 0;
  padding: 16px 18px;
  background: var(--lake-pale);
  border-left: 3px solid var(--lake);
  font-size: 14px;
  line-height: 1.8;
  color: #22424E;
}

.page-about .about-flow__note a {
  color: var(--lake);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------------- 时间轴 ---------------- */
.page-about .about-timeline {
  background: var(--paper);
  border-top: 1px solid var(--line);
  padding: var(--ab-pad) 0;
}

.page-about .about-timeline .section__title {
  margin: 8px 0 0;
}

.page-about .about-timeline__grid {
  display: grid;
  gap: 32px;
  margin-top: 30px;
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-timeline__item {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 14px;
  padding-bottom: 26px;
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline__year {
  padding-top: 3px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-align: right;
  color: var(--gold);
}

.page-about .about-timeline__body {
  position: relative;
  padding-left: 20px;
  border-left: 1px solid var(--line);
}

.page-about .about-timeline__body::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--ochre);
  transition: background-color 240ms var(--ease), border-color 240ms var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__body::before {
  background: var(--lake);
  border-color: var(--lake);
}

.page-about .about-timeline__body h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-timeline__body p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ab-body);
}

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

.page-about .about-timeline__media .media__frame {
  border: 1px solid var(--line);
  background: var(--ink);
  overflow: hidden;
}

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

.page-about .about-timeline__media .media__cap {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------------- 服务覆盖 ---------------- */
.page-about .about-reach {
  background: var(--ink);
  color: var(--paper);
  padding: var(--ab-pad) 0;
}

.page-about .about-reach .section__head {
  max-width: 72ch;
}

.page-about .about-reach .section__label {
  color: var(--gold);
}

.page-about .about-reach .section__title {
  margin: 8px 0 0;
  color: var(--paper);
}

.page-about .about-reach__grid {
  display: grid;
  gap: 26px;
  margin-top: 26px;
}

.page-about .about-reach__lead {
  margin: 0 0 16px;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.82;
  color: #B9C6CB;
}

.page-about .about-reach__lead:last-child {
  margin-bottom: 0;
}

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

.page-about .about-reach__media .media__frame {
  border: 1px solid var(--rail-line);
  background: var(--slate);
  overflow: hidden;
}

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

.page-about .about-reach__band {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--rail-line);
  border: 1px solid var(--rail-line);
}

.page-about .about-reach__band li {
  background: var(--slate);
  padding: 16px 14px 18px;
}

.page-about .about-reach__band span {
  display: block;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--gold);
}

.page-about .about-reach__band em {
  display: block;
  margin-top: 7px;
  font-style: normal;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ---------------- 合作与年度观察 ---------------- */
.page-about .about-partners {
  background: var(--paper);
  padding: var(--ab-pad) 0;
}

.page-about .about-partners .section__head {
  max-width: 72ch;
}

.page-about .about-partners .section__title {
  margin: 8px 0 12px;
}

.page-about .about-partners .section__lead {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ab-body);
}

.page-about .about-partners__grid {
  display: grid;
  gap: 30px;
  margin-top: 28px;
}

.page-about .about-partners__intro p {
  margin: 0 0 16px;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--ab-body);
}

.page-about .about-partners__intro p:last-child {
  margin-bottom: 0;
}

.page-about .about-partners__intro a {
  color: var(--lake);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-partners__list {
  border-top: 1px solid var(--line);
}

.page-about .about-partners__list .accordion__item {
  border-bottom: 1px solid var(--line);
}

.page-about .about-partners__head {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-about .about-partners__list .accordion__trigger {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 16px 2px;
  background: none;
  border: 0;
  font: inherit;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  transition: background-color 240ms var(--ease);
}

.page-about .about-partners__list .accordion__trigger:hover {
  background: var(--lake-pale);
}

.page-about .about-partners__list .accordion__index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ochre);
}

.page-about .about-partners__name {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}

.page-about .about-partners__list .accordion__mark {
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--lake);
  border-bottom: 2px solid var(--lake);
  transform: rotate(45deg);
  transition: transform 280ms var(--ease);
}

.page-about .about-partners__list .accordion__trigger[aria-expanded="true"] .accordion__mark {
  transform: rotate(-135deg);
}

.page-about .about-partners__list .accordion__panel {
  padding: 0 2px 18px;
}

.page-about .about-partners__list .accordion__body {
  padding-left: 14px;
  border-left: 2px solid var(--ochre);
  font-size: 15px;
  line-height: 1.8;
  color: var(--ab-body);
}

.page-about .about-partners__list .accordion__body p {
  margin: 0;
  max-width: 66ch;
}

/* ---------------- 收尾 ---------------- */
.page-about .about-cta {
  background: var(--lake-pale);
  border-top: 1px solid var(--line);
  padding: 34px 0;
}

.page-about .about-cta__inner {
  display: grid;
  gap: 18px;
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
  color: #1D3E4A;
}

.page-about .about-cta__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

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

@media (min-width: 900px) {
  .page-about {
    --ab-pad: 84px;
  }

  .page-about .about-hero {
    padding: 32px 0 44px;
  }

  .page-about .about-hero__frame {
    padding: 46px 44px 42px;
  }

  .page-about .about-hero__title {
    max-width: 20ch;
    font-size: clamp(38px, 4.2vw, 56px);
  }

  .page-about .about-hero__lead {
    font-size: 17px;
  }

  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 32px;
  }

  .page-about .about-flow__steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 40px;
  }

  .page-about .about-flow__step {
    padding-bottom: 26px;
  }

  .page-about .about-cta {
    padding: 44px 0;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
  }
}

@media (min-width: 1120px) {
  .page-about .about-claim__grid {
    grid-template-columns: minmax(220px, 0.72fr) minmax(0, 1.28fr);
    gap: 54px;
    align-items: start;
  }

  .page-about .about-timeline__grid {
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 48px;
    align-items: start;
  }

  .page-about .about-reach__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: 46px;
    align-items: center;
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
    gap: 46px;
    align-items: start;
  }
}

@media (max-width: 359px) {
  .page-about .about-hero__title {
    font-size: 25px;
  }

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

  .page-about .about-hero__stats span {
    font-size: 20px;
  }

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

  .page-about .about-timeline__item {
    grid-template-columns: 46px minmax(0, 1fr);
    gap: 10px;
  }

  .page-about .about-claim__list li {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

  .page-about .about-hero__acts .btn,
  .page-about .about-cta__acts .btn {
    width: 100%;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero__frame::before,
  .page-about .about-flow__step::before,
  .page-about .about-timeline__body::before,
  .page-about .accordion__mark,
  .page-about .accordion__trigger {
    transition: none;
  }
}