.page-about {
  background: var(--gray-100);
  color: var(--ink-text);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background: var(--gray-100);
  padding: 28px 0 0;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: 26px;
}

.page-about .about-hero__title {
  margin: 18px 0 0;
  font-family: var(--font-sans);
  font-size: clamp(2.125rem, 8vw, 4.5rem);
  font-weight: 800;
  line-height: 1.03;
  letter-spacing: -0.02em;
  color: var(--ink-text);
  max-width: 14ch;
}

.page-about .about-hero__lede {
  margin-top: 26px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 14px;
}

.page-about .about-hero__lede p {
  margin: 0;
  max-width: 62ch;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--gray-600);
}

.page-about .about-hero__lede p:first-child {
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--ink-text);
}

.page-about .about-hero__figure {
  margin: 34px 0 0;
  background: var(--ink-900);
}

.page-about .about-hero__figure .media {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 0;
}

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

/* ---------- 主张 ---------- */
.page-about .about-claim {
  background: var(--paper);
}

.page-about .about-claim__grid {
  display: grid;
  gap: 34px;
}

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

.page-about .about-claim__list li {
  position: relative;
  padding: 20px 0 20px 26px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-claim__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 29px;
  width: 14px;
  height: 2px;
  background: var(--lime-500);
}

.page-about .about-claim__name {
  margin: 0 0 6px;
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink-text);
}

.page-about .about-claim__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--gray-600);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--ink-900);
  color: var(--gray-100);
}

.page-about .about-team .eyebrow {
  color: var(--lime-500);
}

.page-about .about-team .section-title {
  color: var(--gray-100);
}

.page-about .about-team__head {
  display: grid;
  gap: 22px;
}

.page-about .about-team__lede {
  margin: 0;
  max-width: 56ch;
  font-size: 0.9375rem;
  line-height: 1.82;
  color: var(--gray-400);
}

.page-about .about-team__roles {
  list-style: none;
  margin: 38px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}

.page-about .about-team__roles li {
  background: var(--ink-900);
  padding: 24px 20px 26px;
}

.page-about .about-team__num {
  display: block;
  font-size: 2.25rem;
  line-height: 1;
  font-weight: 600;
  color: var(--lime-500);
  letter-spacing: -0.03em;
}

.page-about .about-team__role {
  margin: 14px 0 8px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--gray-100);
}

.page-about .about-team__desc {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.78;
  color: var(--gray-400);
}

/* ---------- 三道工序 ---------- */
.page-about .about-flow {
  background: var(--gray-100);
}

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

.page-about .flow {
  position: relative;
}

.page-about .flow__radio {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

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

.page-about .flow__steps li {
  margin: 0;
  padding: 0;
}

.page-about .flow__step {
  display: grid;
  grid-template-columns: 44px 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 18px 14px 18px 14px;
  border-bottom: 1px solid var(--line);
  border-left: 3px solid transparent;
  cursor: pointer;
  transition: background var(--t) var(--ease), border-color var(--t) var(--ease);
}

.page-about .flow__step:hover {
  background: rgba(28, 68, 56, 0.06);
}

.page-about .flow__idx {
  font-size: 0.8125rem;
  color: var(--gray-600);
}

.page-about .flow__name {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--ink-text);
}

.page-about .flow__mark {
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray-600);
  border: 1px solid var(--line);
  padding: 3px 7px;
}

.page-about #flow-a:checked ~ .flow__steps label[for="flow-a"],
.page-about #flow-b:checked ~ .flow__steps label[for="flow-b"],
.page-about #flow-c:checked ~ .flow__steps label[for="flow-c"] {
  background: var(--paper);
  border-left-color: var(--lime-500);
}

.page-about #flow-a:checked ~ .flow__steps label[for="flow-a"] .flow__idx,
.page-about #flow-b:checked ~ .flow__steps label[for="flow-b"] .flow__idx,
.page-about #flow-c:checked ~ .flow__steps label[for="flow-c"] .flow__idx {
  color: var(--ink-700);
}

.page-about #flow-a:focus-visible ~ .flow__steps label[for="flow-a"],
.page-about #flow-b:focus-visible ~ .flow__steps label[for="flow-b"],
.page-about #flow-c:focus-visible ~ .flow__steps label[for="flow-c"] {
  outline: 2px solid var(--lime-500);
  outline-offset: -2px;
}

.page-about .flow__panels {
  margin-top: 22px;
  padding: 22px 20px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-top: 3px solid var(--ink-700);
}

.page-about .flow__panel {
  display: none;
}

.page-about #flow-a:checked ~ .flow__panels .flow__panel--a,
.page-about #flow-b:checked ~ .flow__panels .flow__panel--b,
.page-about #flow-c:checked ~ .flow__panels .flow__panel--c {
  display: block;
}

.page-about .flow__panel-title {
  margin: 0 0 10px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink-text);
}

.page-about .flow__panel p {
  margin: 0 0 10px;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--gray-600);
}

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

.page-about .about-flow__aside .media {
  width: 100%;
  border-radius: 0;
}

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

.page-about .about-note {
  margin: 14px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--lime-500);
  font-size: 0.875rem;
  line-height: 1.72;
  color: var(--gray-600);
}

/* ---------- 历程 ---------- */
.page-about .about-track {
  background: var(--paper);
}

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

.page-about .about-track__note {
  margin: 0;
  max-width: 46ch;
  font-size: 0.875rem;
  line-height: 1.78;
  color: var(--gray-600);
}

.page-about .about-track__figure {
  margin: 32px 0 0;
}

.page-about .about-track__figure .media {
  width: 100%;
  border-radius: 0;
}

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

.page-about .about-track__list {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-track__list::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 24px;
  left: 5px;
  width: 1px;
  background: var(--line);
}

.page-about .track-node {
  position: relative;
  padding: 0 0 34px 32px;
}

.page-about .track-node::before {
  content: "";
  position: absolute;
  top: 5px;
  left: 0;
  width: 11px;
  height: 11px;
  background: var(--paper);
  border: 1px solid var(--ink-700);
  transition: background var(--t) var(--ease), border-color var(--t) var(--ease);
}

.page-about .track-node:hover::before {
  background: var(--lime-500);
  border-color: var(--ink-900);
}

.page-about .track-node__ver {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--ink-700);
  border-bottom: 1px solid var(--lime-500);
  padding-bottom: 2px;
}

.page-about .track-node__title {
  margin: 10px 0 6px;
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink-text);
}

.page-about .track-node__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--gray-600);
  max-width: 46ch;
}

.page-about .about-track__foot {
  margin: 8px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--gray-600);
}

.page-about .about-inline-link {
  color: var(--ink-text);
  text-decoration: none;
  border-bottom: 1px solid var(--lime-500);
  padding-bottom: 1px;
  transition: border-color var(--t) var(--ease), color var(--t) var(--ease);
}

.page-about .about-inline-link:hover {
  border-bottom-color: var(--ink-text);
}

.page-about .about-inline-link:focus-visible {
  outline: 2px solid var(--lime-500);
  outline-offset: 2px;
}

/* ---------- 四步上手 ---------- */
.page-about .about-start {
  background: var(--gray-100);
}

.page-about .about-start__steps {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-start__steps li {
  margin: 0;
  padding: 0;
}

.page-about .start-step {
  background: var(--paper);
  border: 1px solid var(--line);
  transition: border-color var(--t) var(--ease);
}

.page-about .start-step[open] {
  border-color: var(--ink-700);
  box-shadow: inset 0 3px 0 var(--lime-500);
}

.page-about .start-step__summary {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
  padding: 18px 16px;
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.page-about .start-step__summary::-webkit-details-marker {
  display: none;
}

.page-about .start-step__summary::after {
  content: "";
  width: 8px;
  height: 8px;
  border-right: 1.5px solid var(--ink-700);
  border-bottom: 1.5px solid var(--ink-700);
  transform: rotate(45deg);
  transition: transform var(--t) var(--ease);
}

.page-about .start-step[open] .start-step__summary::after {
  transform: rotate(-135deg);
}

.page-about .start-step__summary:focus-visible {
  outline: 2px solid var(--lime-500);
  outline-offset: -2px;
}

.page-about .start-step__num {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--ink-700);
}

.page-about .start-step__name {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--ink-text);
}

.page-about .start-step__body {
  padding: 0 16px 20px;
  border-top: 1px solid var(--line-soft);
  margin-top: 2px;
  padding-top: 14px;
}

.page-about .start-step__body p {
  margin: 0 0 12px;
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--gray-600);
}

/* ---------- 联系与建议 ---------- */
.page-about .about-talk {
  background: var(--ink-900);
  color: var(--gray-100);
}

.page-about .about-talk .eyebrow {
  color: var(--lime-500);
}

.page-about .about-talk .section-title {
  color: var(--gray-100);
}

.page-about .about-talk__grid {
  display: grid;
  gap: 34px;
}

.page-about .about-talk__text {
  margin: 18px 0 26px;
  max-width: 46ch;
  font-size: 0.9375rem;
  line-height: 1.82;
  color: var(--gray-400);
}

.page-about .about-talk__types {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}

.page-about .about-talk__types li {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 14px;
  background: var(--ink-900);
  padding: 18px 18px 20px;
}

.page-about .about-talk__key {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--lime-500);
  padding-top: 3px;
}

.page-about .about-talk__name {
  margin: 0 0 6px;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--gray-100);
}

.page-about .about-talk__types p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.76;
  color: var(--gray-400);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero {
    padding-top: 36px;
  }

  .page-about .about-hero__lede {
    gap: 18px;
  }

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

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

  .page-about .flow__step {
    grid-template-columns: 56px 1fr auto;
    padding: 20px 18px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__lede {
    grid-template-columns: 7fr 5fr;
    gap: 56px;
    align-items: start;
  }

  .page-about .about-hero__figure {
    margin-top: 44px;
  }

  .page-about .about-hero__figure .media {
    aspect-ratio: 21 / 9;
  }

  .page-about .about-claim__grid {
    grid-template-columns: 7fr 5fr;
    gap: 72px;
    align-items: start;
  }

  .page-about .about-team__head {
    grid-template-columns: 7fr 5fr;
    gap: 56px;
    align-items: end;
  }

  .page-about .about-flow__grid {
    grid-template-columns: 7fr 5fr;
    gap: 52px;
    align-items: start;
  }

  .page-about .about-track__head {
    grid-template-columns: 7fr 5fr;
    gap: 56px;
    align-items: end;
  }

  .page-about .about-track__list {
    margin-top: 52px;
  }

  .page-about .about-track__list::before {
    left: 50%;
    top: 8px;
    bottom: 32px;
  }

  .page-about .track-node {
    width: 50%;
    padding: 0 44px 44px 0;
    text-align: right;
    box-sizing: border-box;
  }

  .page-about .track-node::before {
    left: auto;
    right: -6px;
    top: 6px;
  }

  .page-about .track-node__text {
    margin-left: auto;
  }

  .page-about .track-node:nth-child(even) {
    margin-left: 50%;
    padding: 0 0 44px 44px;
    text-align: left;
  }

  .page-about .track-node:nth-child(even)::before {
    left: -6px;
    right: auto;
  }

  .page-about .track-node:nth-child(even) .track-node__text {
    margin-left: 0;
  }

  .page-about .about-talk__grid {
    grid-template-columns: 5fr 6fr;
    gap: 72px;
    align-items: start;
  }
}

@media (min-width: 1100px) {
  .page-about .about-start__steps {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-hero__title {
    max-width: 18ch;
  }
}
</style>
<<<END>>>
</result>