.page-about {
  --about-rule-dark: rgba(30, 42, 68, 0.9);
  --about-rule-ink: rgba(36, 28, 22, 0.22);
  --about-ink-soft: rgba(36, 28, 22, 0.78);
  --about-comet-soft: rgba(233, 246, 248, 0.76);
}

/* ---------- 通用排版 ---------- */
.page-about .eyebrow {
  font-family: var(--font-data);
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--trail);
  margin: 0 0 14px;
}

.page-about .section--cream .eyebrow {
  color: #b03a10;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-head);
  letter-spacing: -0.02em;
  margin: 0;
}

.page-about h2 {
  font-size: clamp(24px, 3.6vw, 40px);
  line-height: 1.14;
  font-weight: 800;
  margin-bottom: 20px;
}

.page-about h3 {
  font-size: var(--fs-18);
  line-height: 1.35;
  font-weight: 700;
}

.page-about .prose {
  font-size: var(--fs-16);
  line-height: 1.8;
}

.page-about .prose p {
  margin: 0 0 16px;
  max-width: 42em;
}

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

.page-about .section-head {
  max-width: 720px;
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
}

.page-about .mono {
  font-variant-numeric: tabular-nums;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  background: var(--void);
  color: var(--comet);
  padding: clamp(26px, 4vw, 44px) 0 clamp(44px, 6vw, 76px);
  border-bottom: var(--hair);
}

.page-about .about-crumb {
  margin-bottom: clamp(26px, 4vw, 48px);
}

.page-about .about-crumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  font-family: var(--font-data);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: rgba(233, 246, 248, 0.55);
}

.page-about .about-crumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--steel);
}

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

.page-about .about-crumb a:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(28px, 5vw, 52px);
}

.page-about .about-hero h1 {
  font-size: clamp(34px, 6.2vw, 68px);
  line-height: 1.05;
  font-weight: 900;
  margin-bottom: 22px;
}

.page-about .about-hero .lead {
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.7;
  color: var(--comet);
  margin: 0 0 18px;
  max-width: 26em;
}

.page-about .about-hero__note {
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--about-comet-soft);
  margin: 0;
  padding-top: 18px;
  border-top: var(--hair);
  max-width: 34em;
}

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

.page-about .media__frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  background: linear-gradient(150deg, var(--steel) 0%, var(--void) 78%);
}

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

.page-about .media__caption {
  margin-top: 12px;
  font-size: var(--fs-12);
  line-height: 1.7;
  color: var(--about-ink-soft);
}

.page-about .about-hero__figure .media__frame {
  aspect-ratio: 16 / 9;
  border: 1px solid var(--steel);
}

/* ---------- 坐标从哪来 ---------- */
.page-about .about-origin {
  background: var(--cream);
  color: var(--ink);
  padding: clamp(48px, 7vw, 88px) 0;
}

.page-about .about-origin__grid {
  display: grid;
  gap: clamp(32px, 5vw, 60px);
}

.page-about .about-origin__list {
  list-style: none;
  margin: 0;
  padding: 0;
  align-self: start;
}

.page-about .about-origin__list li {
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 16px;
  padding: 22px 0;
  border-top: 1px solid var(--about-rule-ink);
}

.page-about .about-origin__list li:last-child {
  border-bottom: 1px solid var(--about-rule-ink);
}

.page-about .about-origin__idx {
  grid-row: span 2;
  font-size: var(--fs-14);
  color: #b03a10;
  padding-top: 3px;
}

.page-about .about-origin__list strong {
  font-family: var(--font-head);
  font-size: var(--fs-18);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-about .about-origin__list p {
  grid-column: 2;
  margin: 8px 0 0;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--about-ink-soft);
}

/* ---------- 我们服务谁 ---------- */
.page-about .about-audience {
  background: var(--deep);
  color: var(--comet);
  padding: clamp(48px, 7vw, 88px) 0;
}

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

.page-about .about-audience__item {
  padding: clamp(22px, 3.2vw, 34px) 0;
  border-top: var(--hair);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.page-about .about-audience__num {
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-about .about-audience__item p {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--about-comet-soft);
  flex: 1 1 auto;
}

.page-about .about-audience__foot {
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding-top: 22px;
  border-top: var(--hair);
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--about-comet-soft);
  max-width: 52em;
}

/* ---------- 内容怎么做出来 ---------- */
.page-about .about-process {
  background: var(--cream);
  color: var(--ink);
  padding: clamp(48px, 7vw, 88px) 0;
}

.page-about .about-process__grid {
  display: grid;
  gap: clamp(32px, 5vw, 56px);
}

.page-about .about-process__steps {
  list-style: none;
  margin: clamp(28px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-process__steps li {
  padding: 18px 0;
  border-top: 1px solid var(--about-rule-ink);
}

.page-about .about-process__steps li:last-child {
  border-bottom: 1px solid var(--about-rule-ink);
}

.page-about .about-process__idx {
  display: inline-block;
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  color: #b03a10;
  margin-bottom: 8px;
}

.page-about .about-process__steps h3 {
  font-size: var(--fs-16);
  margin-bottom: 6px;
}

.page-about .about-process__steps p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--about-ink-soft);
}

.page-about .about-process__figure .media__frame {
  aspect-ratio: 3 / 2;
}

.page-about .about-process__figure .media__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(200deg, rgba(79, 216, 224, 0.16), transparent 58%);
  pointer-events: none;
}

/* ---------- 团队与分工 ---------- */
.page-about .about-team {
  background: var(--void);
  color: var(--comet);
  padding: clamp(48px, 7vw, 88px) 0;
}

.page-about .about-team__intro {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--about-comet-soft);
}

.page-about .about-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--hair);
}

.page-about .about-team__row {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 6px 16px;
  align-items: start;
  padding: 24px 8px;
  border-bottom: var(--hair);
  transition: background var(--t-fast), padding-left var(--t-fast);
}

.page-about .about-team__row:hover {
  background: rgba(79, 216, 224, 0.06);
  padding-left: 16px;
}

.page-about .about-team__idx {
  font-size: var(--fs-24);
  font-weight: 700;
  color: var(--trail);
  line-height: 1.1;
}

.page-about .about-team__body h3 {
  margin-bottom: 8px;
}

.page-about .about-team__body p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--about-comet-soft);
  max-width: 46em;
}

.page-about .about-team__tag {
  grid-column: 2;
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--violet);
}

/* ---------- 9 个赛季 ---------- */
.page-about .about-seasons {
  background: var(--cream);
  color: var(--ink);
  padding: clamp(48px, 7vw, 88px) 0;
}

.page-about .about-seasons__grid {
  display: grid;
  gap: clamp(32px, 5vw, 56px);
}

.page-about .about-seasons__figure {
  margin-top: clamp(26px, 4vw, 40px);
  max-width: 320px;
}

.page-about .about-seasons__figure .media__frame {
  aspect-ratio: 1 / 1;
}

.page-about .about-track {
  background: var(--void);
  color: var(--comet);
  padding: clamp(22px, 3.4vw, 36px) clamp(20px, 3vw, 32px);
  border-radius: var(--radius);
  border: 1px solid var(--steel);
}

.page-about .about-track .accordion__item {
  position: relative;
  padding-left: 26px;
  border-top: 1px solid var(--steel);
}

.page-about .about-track .accordion__item:first-child {
  border-top: 0;
}

.page-about .about-track .accordion__item::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--steel);
}

.page-about .about-track .accordion__item::after {
  content: "";
  position: absolute;
  left: 0;
  top: 30px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--trail);
  box-shadow: 0 0 0 3px rgba(79, 216, 224, 0.16);
  transition: background var(--t-fast), box-shadow var(--t-fast);
}

.page-about .about-track .accordion__item[data-open]::after {
  background: var(--ember);
  box-shadow: 0 0 0 4px rgba(255, 90, 43, 0.2);
}

.page-about .about-track .accordion__item h3 {
  margin: 0;
}

.page-about .about-track .accordion__trigger {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
  width: 100%;
  min-height: 48px;
  padding: 18px 0;
  background: none;
  border: 0;
  color: var(--comet);
  font-family: var(--font-head);
  font-size: var(--fs-18);
  font-weight: 700;
  letter-spacing: -0.01em;
  text-align: left;
  cursor: pointer;
}

.page-about .about-track .accordion__trigger:hover .about-track__label {
  color: var(--trail);
}

.page-about .about-track .accordion__trigger:focus-visible {
  outline: 2px solid var(--trail);
  outline-offset: 3px;
}

.page-about .about-track__dot {
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--amber);
}

.page-about .about-track__label {
  transition: color var(--t-fast);
}

.page-about .about-track .accordion__icon {
  position: relative;
  width: 16px;
  height: 16px;
  flex: none;
}

.page-about .about-track .accordion__icon::before,
.page-about .about-track .accordion__icon::after {
  content: "";
  position: absolute;
  background: var(--trail);
}

.page-about .about-track .accordion__icon::before {
  left: 0;
  right: 0;
  top: 50%;
  height: 1.5px;
  transform: translateY(-50%);
}

.page-about .about-track .accordion__icon::after {
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1.5px;
  transform: translateX(-50%);
  transition: transform var(--t-fast), opacity var(--t-fast);
}

.page-about .about-track .accordion__item[data-open] .accordion__icon::after {
  transform: translateX(-50%) scaleY(0);
  opacity: 0;
}

.page-about .about-track .accordion__panel {
  display: none;
  padding: 0 0 22px;
}

.page-about .about-track .accordion__item[data-open] .accordion__panel {
  display: block;
}

.page-about .about-track .accordion__panel p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--about-comet-soft);
  max-width: 40em;
}

/* ---------- 合作生态与下一步 ---------- */
.page-about .about-partners {
  background: var(--deep);
  color: var(--comet);
  padding: clamp(48px, 7vw, 88px) 0 clamp(36px, 5vw, 56px);
}

.page-about .about-partners__grid {
  display: grid;
  gap: clamp(32px, 5vw, 56px);
  align-items: start;
}

.page-about .about-partners__copy .btn {
  margin-top: clamp(20px, 3vw, 28px);
}

.page-about .about-partners__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--hair);
}

.page-about .about-partners__item {
  padding: 20px 0;
  border-bottom: var(--hair);
}

.page-about .about-partners__kind {
  display: inline-block;
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  color: var(--amber);
  margin-bottom: 8px;
}

.page-about .about-partners__item p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--about-comet-soft);
}

.page-about .about-next {
  margin-top: clamp(36px, 5vw, 56px);
  padding-top: 24px;
  border-top: var(--hair);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-about .about-next__label {
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  color: rgba(233, 246, 248, 0.5);
  margin: 0;
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .about-process__steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 0 24px;
  }

  .page-about .about-team__row {
    grid-template-columns: 72px 1fr auto;
    align-items: center;
  }

  .page-about .about-team__tag {
    grid-column: 3;
    align-self: center;
  }

  .page-about .about-next {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

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

  .page-about .about-origin__grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

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

  .page-about .about-audience__item {
    padding: clamp(22px, 3.2vw, 34px) clamp(18px, 2.4vw, 30px);
    border-top: var(--hair);
  }

  .page-about .about-audience__item + .about-audience__item {
    border-left: var(--hair);
  }

  .page-about .about-process__grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

  .page-about .about-seasons__grid {
    grid-template-columns: 5fr 7fr;
    align-items: start;
  }

  .page-about .about-partners__grid {
    grid-template-columns: 7fr 5fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team__row,
  .page-about .about-track .accordion__icon::after,
  .page-about .about-track__label {
    transition: none;
  }

  .page-about .about-team__row:hover {
    padding-left: 8px;
  }
}