.page-about {
  --about-gap: clamp(48px, 7vw, 96px);
  --about-block-gap: clamp(40px, 6vw, 80px);
  --about-inner-gap: clamp(18px, 2.6vw, 30px);
  display: block;
  overflow-x: clip;
}

.page-about .about-crumb,
.page-about .breadcrumb {
  padding-top: clamp(18px, 3vw, 30px);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding-block: clamp(26px, 4.5vw, 52px) clamp(32px, 5vw, 64px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(85% 115% at 88% 8%, rgba(44, 229, 210, 0.15), transparent 62%),
    radial-gradient(65% 85% at 4% 92%, rgba(255, 107, 34, 0.11), transparent 64%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: end;
}

.page-about .about-hero__title {
  margin: 14px 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(29px, 4.8vw, 56px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ice);
  max-width: 15em;
}

.page-about .about-hero__lede {
  max-width: 40em;
  margin: 0;
}

.page-about .about-hero__stats {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  gap: 10px;
}

.page-about .about-hero__stat {
  background: var(--night-blue);
  border: 1px solid var(--steel);
  border-left: 3px solid var(--amber);
  clip-path: var(--cut-path-sm);
  padding: 12px 14px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-hero__stat-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(20px, 2.4vw, 27px);
  line-height: 1;
  color: var(--amber);
}

.page-about .about-hero__stat-cap {
  font-size: 12px;
  line-height: 1.5;
  color: var(--mist);
  letter-spacing: 0.03em;
}

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

.page-about .about-hero__media {
  position: relative;
  clip-path: var(--cut-path);
  background: var(--night-blue);
  overflow: hidden;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  opacity: 0.78;
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(205deg, rgba(6, 20, 38, 0.04) 0%, rgba(6, 20, 38, 0.7) 72%, rgba(6, 20, 38, 0.94) 100%);
  box-shadow: inset 0 0 0 1px var(--steel);
  pointer-events: none;
}

.page-about .about-hero__visual .media-frame__caption {
  margin-top: 10px;
}

/* ---------- 常用入口提示条 ---------- */

.page-about .about-quick {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 26px;
  padding: clamp(15px, 2vw, 20px) clamp(17px, 2.6vw, 28px);
  background: var(--teal-deep);
  clip-path: var(--cut-path);
  margin-bottom: var(--about-gap);
}

.page-about .about-quick__label {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
  font-weight: 700;
}

.page-about .about-quick__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
}

.page-about .about-quick__steps li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--ice);
}

.page-about .about-quick__no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--deep-sea);
  background: var(--cyan);
  clip-path: var(--cut-path-sm);
}

.page-about .about-quick .btn {
  margin-left: auto;
}

/* ---------- 分屏骨架 ---------- */

.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-block-gap);
  padding-bottom: clamp(40px, 6vw, 88px);
}

.page-about .about-rail__label {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--mist);
  font-weight: 700;
}

.page-about .about-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.page-about .about-track > li + li {
  margin-top: 30px;
}

.page-about .about-track > li:nth-child(2) {
  margin-top: 27px;
}

.page-about .about-track > li:nth-child(3) {
  margin-top: 24px;
}

.page-about .about-track > li:nth-child(4) {
  margin-top: 21px;
}

.page-about .about-track > li:nth-child(5) {
  margin-top: 18px;
}

.page-about .about-track > li:nth-child(6) {
  margin-top: 15px;
}

.page-about .about-track__link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 4px 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--mist);
  text-decoration: none;
  transition: color 0.18s ease;
}

.page-about .about-track__link::before {
  content: "";
  width: 22px;
  height: 2px;
  flex: none;
  background: var(--steel);
  transition: width 0.18s ease, background-color 0.18s ease;
}

.page-about .about-track__link:hover,
.page-about .about-track__link[aria-current="true"] {
  color: var(--cyan);
}

.page-about .about-track__link:hover::before,
.page-about .about-track__link[aria-current="true"]::before {
  width: 34px;
  background: var(--cyan);
}

.page-about .about-flow {
  display: flex;
  flex-direction: column;
  gap: var(--about-block-gap);
}

.page-about .about-block,
.page-about .about-band {
  scroll-margin-top: 104px;
}

/* ---------- 区块标题 ---------- */

.page-about .about-block__title {
  margin: 10px 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 2.9vw, 34px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--ice);
  max-width: 20em;
}

.page-about .about-block__lede {
  margin: 0;
  max-width: 40em;
}

/* ---------- 三个卡点 ---------- */

.page-about .about-pain {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-pain__item {
  position: relative;
  background: var(--night-blue);
  border-left: 3px solid var(--orange);
  clip-path: var(--cut-path);
  padding: 22px 20px 24px;
  transition: transform 0.18s ease, border-color 0.18s ease;
}

.page-about .about-pain__item:hover {
  transform: translateY(-4px);
  border-left-color: var(--cyan);
}

.page-about .about-pain__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-about .about-pain__item h3 {
  margin: 10px 0 10px;
  font-size: 17px;
  line-height: 1.4;
  color: var(--ice);
}

.page-about .about-pain__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 业务构成主题带 ---------- */

.page-about .about-band {
  position: relative;
  padding: clamp(26px, 4vw, 44px) clamp(20px, 3vw, 38px);
  background: linear-gradient(135deg, var(--teal-deep) 0%, var(--night-blue) 60%, var(--deep-sea) 100%);
  clip-path: var(--cut-path);
}

.page-about .about-band::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--amber) 48%, transparent 92%);
}

.page-about .about-band .about-block__title {
  color: var(--ice);
}

.page-about .about-band__cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  margin-top: 26px;
}

.page-about .about-band__col h3 {
  margin: 0 0 10px;
  font-size: 16px;
  line-height: 1.4;
}

.page-about .about-band__col:nth-child(1) h3 {
  color: var(--cyan);
}

.page-about .about-band__col:nth-child(2) h3 {
  color: var(--amber);
}

.page-about .about-band__col:nth-child(3) h3 {
  color: var(--orange);
}

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

/* ---------- 团队 ---------- */

.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 34px);
  margin-top: 26px;
}

.page-about .about-team__nums {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.page-about .about-team__nums li {
  background: var(--night-blue);
  border-left: 2px solid var(--steel);
  padding: 12px 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-team__nums li:nth-child(2) {
  border-left-color: var(--cyan);
}

.page-about .about-team__nums li:nth-child(3) {
  border-left-color: var(--orange);
}

.page-about .about-team__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(24px, 3.2vw, 38px);
  line-height: 1;
  color: var(--amber);
}

.page-about .about-team__cap {
  font-size: 12px;
  line-height: 1.5;
  color: var(--mist);
}

.page-about .about-team__desc {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
  max-width: 38em;
}

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

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

.page-about .about-team__media {
  clip-path: var(--cut-path);
  background: var(--night-blue);
  overflow: hidden;
}

.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1100 / 740;
  object-fit: cover;
}

.page-about .about-team__figure .media-frame__caption {
  margin-top: 10px;
}

/* ---------- 发展阶段折叠 ---------- */

.page-about .about-phases {
  margin-top: 26px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .about-phase {
  background: var(--night-blue);
  border-left: 3px solid var(--steel);
  clip-path: var(--cut-path-sm);
  transition: border-color 0.18s ease;
}

.page-about .about-phase[open] {
  border-left-color: var(--cyan);
}

.page-about .about-phase > summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

.page-about .about-phase > summary::-webkit-details-marker {
  display: none;
}

.page-about .about-phase > summary::marker {
  content: "";
}

.page-about .about-phase__year {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--amber);
  flex: none;
  min-width: 5.2em;
}

.page-about .about-phase__name {
  font-size: 15px;
  line-height: 1.45;
  color: var(--ice);
}

.page-about .about-phase__toggle {
  margin-left: auto;
  width: 9px;
  height: 9px;
  flex: none;
  border-right: 2px solid var(--mist);
  border-bottom: 2px solid var(--mist);
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.page-about .about-phase[open] .about-phase__toggle {
  transform: rotate(-135deg) translate(-2px, -2px);
  border-color: var(--cyan);
}

.page-about .about-phase__body {
  padding: 0 18px 20px;
}

.page-about .about-phase__body p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-phase__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-phase__facts li {
  position: relative;
  padding-left: 18px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ice);
}

.page-about .about-phase__facts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 2px;
  background: var(--cyan);
}

.page-about .about-phase__more {
  margin: 14px 0 0;
}

.page-about .about-phase__link {
  font-size: 13.5px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px dashed rgba(44, 229, 210, 0.5);
}

.page-about .about-phase__link:hover {
  color: var(--ice);
  border-bottom-color: var(--ice);
}

/* ---------- 合作生态 ---------- */

.page-about .about-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 34px);
}

.page-about .about-partners__list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-about .about-partners__list li {
  padding-left: 16px;
  border-left: 2px solid var(--steel);
}

.page-about .about-partners__tag {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  margin-bottom: 6px;
}

.page-about .about-partners__list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-partners__note {
  margin: 22px 0 0;
  padding: 14px 16px;
  background: var(--teal-deep);
  clip-path: var(--cut-path-sm);
  font-size: 14px;
  line-height: 1.75;
  color: var(--ice);
  max-width: 40em;
}

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

.page-about .about-partners__media {
  clip-path: var(--cut-path);
  background: var(--night-blue);
  overflow: hidden;
}

.page-about .about-partners__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.page-about .about-partners__figure .media-frame__caption {
  margin-top: 10px;
}

/* ---------- 推荐标准 ---------- */

.page-about .about-block--standard {
  position: relative;
}

.page-about .about-standard__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-standard__item {
  background: var(--night-blue);
  border-top: 2px solid var(--steel);
  clip-path: var(--cut-path);
  padding: 22px 20px 24px;
  transition: transform 0.18s ease, border-color 0.18s ease;
}

.page-about .about-standard__item:hover {
  transform: translateY(-4px);
  border-top-color: var(--cyan);
}

.page-about .about-standard__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(22px, 2.6vw, 32px);
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .about-standard__item:nth-child(2) .about-standard__num {
  color: var(--amber);
}

.page-about .about-standard__item:nth-child(3) .about-standard__num {
  color: var(--orange);
}

.page-about .about-standard__item h3 {
  margin: 12px 0 8px;
  font-size: 15px;
  color: var(--ice);
  letter-spacing: 0.06em;
}

.page-about .about-standard__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 收尾 ---------- */

.page-about .about-cta {
  margin-top: clamp(8px, 2vw, 20px);
  padding: clamp(24px, 3.6vw, 40px) clamp(20px, 3vw, 38px);
  background: linear-gradient(102deg, var(--night-blue) 0%, var(--teal-deep) 100%);
  clip-path: var(--cut-path);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px 28px;
}

.page-about .about-cta__title {
  margin: 0 0 8px;
  font-size: clamp(19px, 2.2vw, 26px);
  line-height: 1.3;
  color: var(--ice);
}

.page-about .about-cta__lede {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
  max-width: 34em;
}

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

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-about .about-pain {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 820px) {
  .page-about .about-band__cols {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
  }

  .page-about .about-band__col {
    padding: 0 clamp(14px, 2vw, 26px);
  }

  .page-about .about-band__col:first-child {
    padding-left: 0;
  }

  .page-about .about-band__col:last-child {
    padding-right: 0;
  }

  .page-about .about-band__col + .about-band__col {
    border-left: 1px dashed var(--steel);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-partners {
    grid-template-columns: minmax(0, 1fr) minmax(0, 290px);
    align-items: start;
  }
}

@media (min-width: 1040px) {
  .page-about .about-body {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    align-items: start;
    gap: clamp(32px, 4vw, 72px);
  }

  .page-about .about-rail {
    position: sticky;
    top: 104px;
    align-self: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-pain__item,
  .page-about .about-standard__item,
  .page-about .about-track__link,
  .page-about .about-track__link::before,
  .page-about .about-phase,
  .page-about .about-phase__toggle {
    transition: none;
  }

  .page-about .about-pain__item:hover,
  .page-about .about-standard__item:hover {
    transform: none;
  }
}