.page-about {
  background: var(--ft-deep);
  color: var(--ft-text);
  overflow-x: hidden;
}

.page-about .about-crumb {
  padding-top: 22px;
  padding-bottom: 6px;
}

.page-about .about-crumb .ft-crumb a {
  color: var(--ft-muted);
  text-decoration: none;
}

.page-about .about-crumb .ft-crumb a:hover {
  color: var(--ft-cyan);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 26px 0 52px;
}

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

.page-about .about-hero__title {
  margin: 14px 0 0;
  color: var(--ft-white);
  font-size: clamp(32px, 7.4vw, 62px);
  line-height: 1.06;
  letter-spacing: -0.02em;
}

.page-about .about-hero__lede {
  margin: 18px 0 0;
  max-width: 46ch;
  color: var(--ft-text);
  font-size: 16px;
  line-height: 1.75;
}

.page-about .about-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__panel {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ft-steel);
  border: 1px solid var(--ft-steel);
  padding: 0;
  overflow: hidden;
}

.page-about .about-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  background: var(--ft-cabin);
}

.page-about .about-hero__stat--hero {
  grid-column: 1 / -1;
  background: linear-gradient(115deg, var(--ft-cabin) 0%, #14385c 100%);
  border-left: 2px solid var(--ft-orange);
}

.page-about .about-hero__num {
  font-family: var(--ft-mono);
  font-size: 30px;
  line-height: 1;
  color: var(--ft-white);
  letter-spacing: 0;
}

.page-about .about-hero__stat--hero .about-hero__num {
  font-size: 46px;
  color: var(--ft-orange);
}

.page-about .about-hero__num em {
  font-style: normal;
  font-size: 0.5em;
  color: var(--ft-cyan);
  margin-left: 2px;
}

.page-about .about-hero__lbl {
  font-size: 12px;
  line-height: 1.5;
  color: var(--ft-muted);
  letter-spacing: 0.04em;
}

/* ---------- 区块通用头 ---------- */
.page-about .about-sec-head {
  max-width: 720px;
}

.page-about .about-sec-head h2 {
  margin: 14px 0 0;
  color: var(--ft-white);
  font-size: clamp(24px, 4.6vw, 38px);
  line-height: 1.18;
  letter-spacing: -0.01em;
}

.page-about .about-sec-head p {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ft-text);
}

/* ---------- 团队分工 ---------- */
.page-about .about-crew {
  border-top: 1px solid var(--ft-steel);
  padding-top: 48px;
}

.page-about .crew-list {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
}

.page-about .crew-item {
  border-top: 1px solid var(--ft-steel);
}

.page-about .crew-item:last-child {
  border-bottom: 1px solid var(--ft-steel);
}

.page-about .crew-item__det {
  padding: 4px 0;
}

.page-about .crew-item__sum {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "tag num"
    "head head";
  align-items: baseline;
  gap: 8px 14px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
  transition: background-color 180ms var(--ft-ease);
}

.page-about .crew-item__sum::-webkit-details-marker {
  display: none;
}

.page-about .crew-item__sum:hover {
  background: rgba(255, 92, 26, 0.06);
}

.page-about .crew-item__tag {
  grid-area: tag;
  font-family: var(--ft-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ft-cyan);
  border: 1px solid var(--ft-steel);
  padding: 4px 8px;
  white-space: nowrap;
}

.page-about .crew-item__head {
  grid-area: head;
  font-size: 17px;
  font-weight: 600;
  color: var(--ft-white);
  line-height: 1.45;
}

.page-about .crew-item__num {
  grid-area: num;
  justify-self: end;
  font-family: var(--ft-mono);
  font-size: 34px;
  line-height: 1;
  color: var(--ft-orange);
}

.page-about .crew-item__num span {
  font-size: 12px;
  color: var(--ft-muted);
  margin-left: 3px;
}

.page-about .crew-item__det[open] .crew-item__sum {
  border-bottom: 1px dashed var(--ft-steel);
}

.page-about .crew-item__body {
  padding: 16px 0 22px;
}

.page-about .crew-item__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
}

.page-about .crew-item__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .crew-item__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ft-muted);
}

.page-about .crew-item__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 1px;
  background: var(--ft-orange);
}

.page-about .about-crew__note {
  margin-top: 30px;
  border-left: 2px solid var(--ft-cyan);
}

.page-about .about-crew__note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--ft-text);
}

/* ---------- 分布 ---------- */
.page-about .about-dist {
  background: linear-gradient(180deg, var(--ft-cabin) 0%, var(--ft-deep) 78%);
  padding-top: 46px;
}

.page-about .about-dist__grid {
  display: grid;
  gap: 34px;
  margin-top: 32px;
}

.page-about .about-dist__chart {
  border: 1px solid var(--ft-steel);
  background: rgba(8, 25, 43, 0.55);
  padding: 20px 16px 16px;
}

.page-about .about-dots {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-dots text {
  font-family: var(--ft-sans);
  font-size: 12px;
  fill: var(--ft-muted);
}

.page-about .about-dots rect {
  rx: 1;
}

.page-about .about-dots g > g {
  transition: opacity 160ms var(--ft-ease);
}

.page-about .about-dots g:hover > g {
  opacity: 0.55;
}

.page-about .about-legend {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin: 16px 0 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--ft-steel);
}

.page-about .about-legend li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--ft-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ft-muted);
}

.page-about .about-legend__dot {
  width: 9px;
  height: 9px;
  display: inline-block;
  border-radius: 1px;
}

.page-about .about-types {
  display: grid;
  gap: 12px;
}

.page-about .about-types__title {
  margin: 0 0 4px;
  font-size: 13px;
  font-family: var(--ft-mono);
  letter-spacing: 0.16em;
  color: var(--ft-cyan);
  font-weight: 500;
}

.page-about .about-type {
  display: grid;
  grid-template-columns: 76px 1fr 34px;
  align-items: center;
  gap: 10px;
  font-size: 13px;
}

.page-about .about-type__name {
  color: var(--ft-text);
  white-space: nowrap;
}

.page-about .about-type__track {
  height: 6px;
  background: var(--ft-steel);
  display: block;
  overflow: hidden;
}

.page-about .about-type__fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--ft-orange), #ff8a4d);
}

.page-about .about-type__num {
  font-family: var(--ft-mono);
  font-size: 14px;
  color: var(--ft-white);
  text-align: right;
}

.page-about .about-dist__tip {
  margin: 22px 0 0;
  padding: 14px 16px;
  border: 1px solid var(--ft-steel);
  background: rgba(61, 242, 208, 0.05);
  font-size: 14px;
  line-height: 1.75;
  color: var(--ft-text);
}

.page-about .about-dist__media {
  margin: 22px 0 0;
}

/* ---------- 时间轴 ---------- */
.page-about .about-time {
  border-top: 1px solid var(--ft-steel);
  padding-top: 48px;
}

.page-about .time-line {
  list-style: none;
  margin: 36px 0 0;
  padding: 0 0 0 22px;
  border-left: 1px solid var(--ft-steel);
}

.page-about .time-node {
  position: relative;
  display: grid;
  gap: 8px;
  padding-bottom: 26px;
}

.page-about .time-node::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 6px;
  width: 9px;
  height: 9px;
  background: var(--ft-deep);
  border: 2px solid var(--ft-orange);
  transform: rotate(45deg);
}

.page-about .time-node__year {
  font-family: var(--ft-mono);
  font-size: 22px;
  line-height: 1;
  color: var(--ft-cyan);
  letter-spacing: 0.02em;
}

.page-about .time-node__card {
  transition: transform 200ms var(--ft-ease), border-color 200ms var(--ft-ease), background-color 200ms var(--ft-ease);
}

.page-about .time-node__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.76;
  color: var(--ft-text);
}

.page-about .time-node__card:hover {
  transform: translateX(4px);
  border-color: rgba(255, 92, 26, 0.55);
  background: rgba(255, 92, 26, 0.07);
}

/* ---------- 复核流程 ---------- */
.page-about .about-audit {
  position: relative;
  margin-top: 56px;
  padding: 62px 0 54px;
  background: var(--ft-cabin);
}

.page-about .about-audit::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -38px;
  height: 38px;
  background: var(--ft-cabin);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
}

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

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

.page-about .about-audit__body h2 {
  margin: 14px 0 0;
  color: var(--ft-white);
  font-size: clamp(24px, 4.6vw, 38px);
  line-height: 1.18;
}

.page-about .about-audit__intro {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.78;
}

.page-about .audit-steps {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--ft-steel);
  border: 1px solid var(--ft-steel);
}

.page-about .audit-step {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 12px;
  padding: 16px 16px 18px;
  background: var(--ft-deep);
}

.page-about .audit-step__no {
  font-family: var(--ft-mono);
  font-size: 15px;
  color: var(--ft-orange);
  padding-top: 2px;
}

.page-about .audit-step h3 {
  margin: 0 0 6px;
  font-size: 16px;
  color: var(--ft-white);
  font-weight: 600;
}

.page-about .audit-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--ft-text);
}

.page-about .about-audit__note {
  margin-top: 24px;
  border-left: 2px solid var(--ft-violet);
}

.page-about .about-audit__note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  padding-top: 54px;
}

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

.page-about .about-eco__figures {
  display: grid;
  gap: 1px;
  background: var(--ft-steel);
  border: 1px solid var(--ft-steel);
}

.page-about .eco-figure {
  background: var(--ft-deep);
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .eco-figure:nth-child(2) {
  background: linear-gradient(100deg, var(--ft-deep) 0%, #1a0f2b 100%);
}

.page-about .eco-figure__num {
  font-family: var(--ft-mono);
  font-size: 32px;
  line-height: 1;
  color: var(--ft-white);
}

.page-about .eco-figure__num em {
  font-style: normal;
  font-size: 0.45em;
  color: var(--ft-cyan);
  margin-left: 3px;
}

.page-about .eco-figure__lbl {
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--ft-muted);
}

.page-about .about-eco__text h3 {
  margin: 0 0 14px;
  font-size: 17px;
  color: var(--ft-white);
  font-weight: 600;
}

.page-about .eco-list {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .eco-list li {
  font-size: 14px;
  line-height: 1.76;
  color: var(--ft-text);
  padding-left: 16px;
  border-left: 1px solid var(--ft-steel);
}

.page-about .eco-list strong {
  color: var(--ft-cyan);
  font-weight: 600;
  margin-right: 6px;
}

.page-about .about-eco__media {
  margin: 30px 0 0;
}

/* ---------- 记录 ---------- */
.page-about .about-proof {
  border-top: 1px solid var(--ft-steel);
  padding-top: 46px;
}

.page-about .about-proof__grid {
  display: grid;
  gap: 1px;
  margin-top: 26px;
  background: var(--ft-steel);
  border: 1px solid var(--ft-steel);
}

.page-about .proof-card {
  background: var(--ft-deep);
  padding: 22px 18px;
}

.page-about .proof-card__year {
  display: block;
  font-family: var(--ft-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--ft-violet);
  margin-bottom: 10px;
}

.page-about .proof-card__year em {
  font-style: normal;
  color: var(--ft-muted);
}

.page-about .proof-card h3 {
  margin: 0 0 8px;
  font-size: 16px;
  color: var(--ft-white);
  font-weight: 600;
}

.page-about .proof-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.74;
  color: var(--ft-muted);
}

.page-about .about-proof__link {
  margin: 22px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ft-muted);
}

.page-about .about-proof__link a {
  color: var(--ft-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 242, 208, 0.4);
}

.page-about .about-proof__link a:hover {
  color: var(--ft-orange);
  border-bottom-color: rgba(255, 92, 26, 0.5);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding: 54px 0 62px;
  border-top: 1px solid var(--ft-steel);
  background: linear-gradient(120deg, rgba(255, 92, 26, 0.1) 0%, rgba(8, 25, 43, 0) 62%);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 24px;
}

.page-about .about-cta h2 {
  margin: 0;
  color: var(--ft-white);
  font-size: clamp(24px, 4.4vw, 34px);
  line-height: 1.2;
}

.page-about .about-cta p {
  margin: 12px 0 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ft-text);
}

.page-about .about-cta__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero__panel {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-hero__stat--hero {
    grid-column: span 2;
    grid-row: span 2;
    justify-content: center;
  }

  .page-about .about-hero__stat--hero .about-hero__num {
    font-size: 64px;
  }

  .page-about .about-eco__figures {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-proof__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 940px) {
  .page-about .about-hero {
    padding: 34px 0 66px;
  }

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

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

  .page-about .crew-item__sum {
    grid-template-columns: 132px 1fr 120px;
    grid-template-areas: "tag head num";
    align-items: center;
    gap: 24px;
    padding: 22px 0;
  }

  .page-about .crew-item__num {
    font-size: 42px;
  }

  .page-about .crew-item__body {
    padding: 18px 0 26px 156px;
  }

  .page-about .about-dist__grid {
    grid-template-columns: 8fr 4fr;
    gap: 40px;
    align-items: start;
  }

  .page-about .time-line {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 30px;
    border-left: 0;
    padding-left: 0;
    border-top: 1px solid var(--ft-steel);
    padding-top: 26px;
  }

  .page-about .time-node {
    padding-bottom: 30px;
  }

  .page-about .time-node::before {
    left: 0;
    top: -31px;
    transform: rotate(45deg);
  }

  .page-about .about-audit__grid {
    grid-template-columns: 6fr 6fr;
    gap: 44px;
    align-items: start;
  }

  .page-about .about-eco__grid {
    grid-template-columns: 7fr 5fr;
    gap: 40px;
    align-items: start;
  }

  .page-about .about-eco__figures {
    grid-template-columns: 1fr;
  }

  .page-about .about-eco__media {
    margin-top: 40px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-dist__chart {
    padding: 26px 24px 20px;
  }

  .page-about .about-sec-head p {
    font-size: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .time-node__card,
  .page-about .crew-item__sum,
  .page-about .about-dots g > g {
    transition: none;
  }

  .page-about .time-node__card:hover {
    transform: none;
  }
}