.page-about {
  --about-band: linear-gradient(120deg, rgba(108, 59, 255, .38), rgba(46, 26, 94, 0) 68%);
  --about-edge: rgba(122, 127, 154, .18);
  display: block;
  overflow-x: clip;
}

.page-about .about-crumb {
  margin: clamp(1.1rem, 3vw, 1.8rem) 0 clamp(1.4rem, 4vw, 2.4rem);
  display: flex;
  gap: .5rem;
  align-items: center;
  font-size: .82rem;
  color: var(--wk-steel);
}

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

.page-about .about-crumb a:hover {
  color: var(--wk-green);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  display: grid;
  gap: clamp(1.6rem, 4vw, 3rem);
  padding-bottom: clamp(2.2rem, 6vw, 4rem);
}

.page-about .about-hero__title {
  margin: .8rem 0 1.1rem;
  font-size: clamp(2.4rem, 9vw, 5.4rem);
  font-weight: 900;
  line-height: .98;
  letter-spacing: -.03em;
  color: var(--wk-mist);
  transform: skewX(-4deg);
  transform-origin: left bottom;
}

.page-about .about-hero__mark {
  display: block;
  background: linear-gradient(100deg, var(--wk-green), var(--wk-yellow) 55%, var(--wk-purple));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .about-hero__lead {
  max-width: 44ch;
  color: rgba(244, 245, 255, .84);
}

.page-about .about-hero__facts {
  display: grid;
  gap: .9rem;
  margin-top: 1.8rem;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
}

.page-about .about-hero__fact {
  display: flex;
  flex-direction: column;
  gap: .25rem;
  padding-left: .9rem;
  border-left: 2px solid var(--wk-purple);
}

.page-about .about-hero__num {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--wk-green);
}

.page-about .about-hero__key {
  font-size: .86rem;
  color: var(--wk-steel);
}

.page-about .about-hero__visual {
  position: relative;
  margin: 0;
  border-radius: var(--wk-radius);
  overflow: hidden;
  border: 1px solid var(--about-edge);
  box-shadow: var(--wk-shadow);
}

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

.page-about .about-hero__ghost {
  margin: 0;
  font-family: var(--wk-font-mono);
  font-size: clamp(.7rem, 2.4vw, .85rem);
  letter-spacing: .34em;
  color: rgba(122, 127, 154, .5);
  text-transform: uppercase;
}

/* ---------- 章节索引 ---------- */
.page-about .about-index {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  padding: 1rem 0 clamp(2rem, 5vw, 3.2rem);
  border-top: 1px solid var(--about-edge);
  border-bottom: 1px solid var(--about-edge);
}

.page-about .about-index__item {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .42rem .85rem;
  border: 1px solid var(--about-edge);
  border-radius: 999px;
  font-size: .86rem;
  color: var(--wk-mist);
  text-decoration: none;
  transition: border-color .25s var(--wk-ease), color .25s var(--wk-ease), background-color .25s var(--wk-ease);
}

.page-about .about-index__item .wk-mono {
  color: var(--wk-yellow);
  font-size: .72rem;
}

.page-about .about-index__item:hover {
  border-color: var(--wk-green);
  color: var(--wk-green);
  background: rgba(57, 255, 136, .06);
}

/* ---------- 通用区块 ---------- */
.page-about .about-block {
  position: relative;
  padding: clamp(2.4rem, 7vw, 4.6rem) 0;
}

.page-about .about-block + .about-block,
.page-about .about-cap + .about-block {
  border-top: 1px solid var(--about-edge);
}

.page-about .about-block__head {
  max-width: 62ch;
  margin-bottom: clamp(1.6rem, 4vw, 2.6rem);
}

.page-about .about-block__title {
  margin: .6rem 0 .9rem;
  font-size: clamp(1.6rem, 4.4vw, 2.7rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -.02em;
  color: var(--wk-mist);
}

.page-about .about-block__intro {
  margin: 0;
  color: rgba(244, 245, 255, .8);
  line-height: 1.8;
}

/* ---------- 业务三条线 ---------- */
.page-about .about-lines {
  display: grid;
  gap: 1rem;
}

.page-about .about-line {
  position: relative;
  padding: 1.5rem 1.3rem 1.5rem 1.5rem;
  border-radius: var(--wk-radius);
  border: 1px solid var(--about-edge);
  background: var(--about-band), var(--wk-card);
  overflow: hidden;
}

.page-about .about-line::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, var(--wk-green), var(--wk-purple));
}

.page-about .about-line__no {
  margin: 0 0 .6rem;
  font-size: .74rem;
  letter-spacing: .18em;
  color: var(--wk-orange);
}

.page-about .about-line__name {
  margin: 0 0 .7rem;
  font-size: 1.2rem;
  color: var(--wk-mist);
}

.page-about .about-line__text {
  margin: 0 0 1rem;
  font-size: .95rem;
  line-height: 1.8;
  color: rgba(244, 245, 255, .78);
}

.page-about .about-line__meta {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

/* ---------- 能力档案筛选 ---------- */
.page-about .about-cap {
  padding: clamp(2.4rem, 7vw, 4rem) 0;
}

.page-about .about-filter {
  margin-bottom: 1.4rem;
}

.page-about .about-filter__btn {
  font-family: var(--wk-font-mono);
  font-size: .78rem;
  letter-spacing: .04em;
}

.page-about .about-caps {
  display: grid;
  gap: .9rem;
  grid-template-columns: 1fr;
}

.page-about .about-cap__card {
  padding: 1.25rem 1.15rem;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  transition: transform .3s var(--wk-ease), border-color .3s var(--wk-ease);
}

.page-about .about-cap__card:hover {
  transform: translateY(-3px);
  border-color: rgba(57, 255, 136, .45);
}

.page-about .about-cap__card[hidden] {
  display: none;
}

.page-about .about-cap__name {
  margin: 0;
  font-size: 1.05rem;
  color: var(--wk-mist);
}

.page-about .about-cap__text {
  margin: 0;
  font-size: .9rem;
  line-height: 1.75;
  color: rgba(244, 245, 255, .74);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: clamp(1.4rem, 4vw, 2.6rem);
}

.page-about .about-team__stats {
  display: grid;
  gap: .8rem;
  margin: 1.6rem 0 0;
  padding: 0;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.page-about .about-team__stat {
  padding: .9rem 1rem;
  border: 1px solid var(--about-edge);
  border-radius: var(--wk-radius-sm);
  background: rgba(27, 16, 53, .5);
}

.page-about .about-team__stat dt {
  font-family: var(--wk-font-mono);
  font-size: .82rem;
  color: var(--wk-yellow);
  letter-spacing: .06em;
}

.page-about .about-team__stat dd {
  margin: .45rem 0 0;
  font-size: .88rem;
  line-height: 1.65;
  color: rgba(244, 245, 255, .76);
}

.page-about .about-team__visual {
  margin: 0;
  border-radius: var(--wk-radius);
  overflow: hidden;
  border: 1px solid var(--about-edge);
}

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

/* ---------- 覆盖规模 ---------- */
.page-about .about-scale__body {
  display: grid;
  gap: clamp(1.4rem, 4vw, 2.4rem);
}

.page-about .about-scale__stats {
  display: grid;
  gap: .8rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.page-about .about-stat {
  padding: 1.1rem 1rem;
  border-radius: var(--wk-radius-sm);
  border: 1px solid var(--about-edge);
  background: linear-gradient(160deg, rgba(108, 59, 255, .2), rgba(20, 20, 34, .9));
  display: flex;
  flex-direction: column;
  gap: .4rem;
}

.page-about .about-stat__num {
  font-size: clamp(1.5rem, 5vw, 2.2rem);
  color: var(--wk-green);
}

.page-about .about-stat__label {
  font-size: .84rem;
  line-height: 1.5;
  color: var(--wk-steel);
}

.page-about .about-scale__visual {
  margin: 0;
  border-radius: var(--wk-radius);
  overflow: hidden;
  border: 1px solid var(--about-edge);
}

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

.page-about .about-scale__cap {
  padding: .7rem 1rem;
  font-family: var(--wk-font-mono);
  font-size: .74rem;
  letter-spacing: .08em;
  color: var(--wk-steel);
  background: var(--wk-card);
}

/* ---------- 时间轴 ---------- */
.page-about .about-tl__list {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-tl__list::before {
  content: "";
  position: absolute;
  left: 7px;
  top: .4rem;
  bottom: .4rem;
  width: 1px;
  background: linear-gradient(180deg, var(--wk-green), var(--wk-purple) 55%, rgba(108, 59, 255, 0));
}

.page-about .about-tl__item {
  position: relative;
  padding: 0 0 1.8rem 2.1rem;
}

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

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: 2px;
  top: .35rem;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--wk-night);
  border: 2px solid var(--wk-green);
  box-shadow: 0 0 0 4px rgba(57, 255, 136, .12);
}

.page-about .about-tl__code {
  display: inline-block;
  margin-bottom: .45rem;
  font-size: .74rem;
  letter-spacing: .2em;
  color: var(--wk-yellow);
}

.page-about .about-tl__name {
  margin: 0 0 .5rem;
  font-size: 1.12rem;
  color: var(--wk-mist);
}

.page-about .about-tl__text {
  margin: 0;
  max-width: 48ch;
  font-size: .93rem;
  line-height: 1.8;
  color: rgba(244, 245, 255, .76);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco__ring {
  display: grid;
  gap: .9rem;
  grid-template-columns: 1fr;
}

.page-about .about-eco__node {
  display: flex;
  align-items: baseline;
  gap: .7rem;
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--about-edge);
  border-radius: var(--wk-radius-sm);
  background: var(--wk-card);
}

.page-about .about-eco__k {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--wk-orange);
}

.page-about .about-eco__v {
  font-size: .9rem;
  color: rgba(244, 245, 255, .8);
}

.page-about .about-eco__node--b {
  background: linear-gradient(120deg, rgba(108, 59, 255, .28), rgba(20, 20, 34, .95));
}

.page-about .about-eco__node--b .about-eco__k {
  color: var(--wk-green);
}

.page-about .about-eco__node--c .about-eco__k {
  color: var(--wk-yellow);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  padding-bottom: clamp(3rem, 8vw, 5rem);
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
}

.page-about .about-next__links .wk-btn {
  text-decoration: none;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-caps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-lines {
    gap: 1.2rem;
  }

  .page-about .about-scale__stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .about-eco__node {
    flex-direction: column;
    align-items: flex-start;
    gap: .4rem;
  }

  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: start;
  }

  .page-about .about-hero__ghost {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero__lead {
    font-size: 1.05rem;
  }

  .page-about .about-lines {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.3rem;
  }

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

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: center;
  }

  .page-about .about-scale__body {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
    align-items: center;
  }

  .page-about .about-tl__list {
    padding-left: 0;
  }

  .page-about .about-tl__list::before {
    left: 50%;
  }

  .page-about .about-tl__item {
    width: 50%;
    padding: 0 2.6rem 2.2rem 0;
  }

  .page-about .about-tl__item::before {
    left: auto;
    right: -6px;
  }

  .page-about .about-tl__item:nth-child(even) {
    margin-left: 50%;
    padding: 0 0 2.2rem 2.6rem;
    text-align: left;
  }

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

  .page-about .about-tl__item:nth-child(odd) {
    text-align: right;
  }

  .page-about .about-tl__item:nth-child(odd) .about-tl__text {
    margin-left: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-cap__card,
  .page-about .about-index__item {
    transition: none;
  }

  .page-about .about-cap__card:hover {
    transform: none;
  }
}