.page-about {
  --about-paper-ink: #10142C;
  --about-paper-accent: #5B3DE0;
  --about-tl-gap: clamp(48px, 6vw, 96px);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(92px, 13vw, 164px) 0 clamp(28px, 4vw, 48px);
}

.page-about .about-hero__glow {
  position: absolute;
  top: -180px;
  right: -160px;
  width: min(660px, 92vw);
  height: min(660px, 92vw);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__crumb {
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-about .about-hero__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 5vw, 60px);
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--bj-font-display);
  font-weight: 900;
  font-size: clamp(32px, 6.4vw, 66px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--bj-white);
  text-shadow: 0 0 38px rgba(123, 92, 255, 0.36);
  text-wrap: balance;
}

.page-about .about-hero__sub {
  margin-top: clamp(18px, 2.4vw, 28px);
  max-width: var(--bj-measure);
  color: var(--bj-slate);
}

.page-about .about-hero__figures {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--bj-line);
  border-radius: var(--bj-radius-lg);
  background: var(--bj-glass);
}

.page-about .about-hero__figure dt {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--bj-slate);
}

.page-about .about-hero__figure dd {
  margin: 8px 0 0;
  font-family: var(--bj-font-mono);
  font-size: clamp(22px, 3.2vw, 32px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--bj-teal);
}

@media (min-width: 940px) {
  .page-about .about-hero__layout {
    grid-template-columns: minmax(0, 1.4fr) minmax(210px, 0.6fr);
    align-items: end;
  }

  .page-about .about-hero__figures {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }
}

/* ---------- 首屏视觉 ---------- */

.page-about .about-visual {
  margin: clamp(28px, 4vw, 52px) 0 0;
}

.page-about .about-visual__inner img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--bj-line);
  border-radius: var(--bj-radius-lg);
}

.page-about .about-visual__inner figcaption {
  margin-top: 14px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--bj-slate);
}

/* ---------- 起点 ---------- */

.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 52px);
}

.page-about .about-origin__aside {
  display: flex;
  gap: 18px;
  align-items: flex-start;
}

.page-about .about-origin__note {
  max-width: 30ch;
  padding-left: 16px;
  border-left: 2px solid var(--bj-line-strong);
  font-size: 14px;
  line-height: 1.85;
  color: var(--bj-slate);
}

@media (min-width: 940px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.75fr);
    align-items: start;
  }
}

/* ---------- 时间线 ---------- */

.page-about .about-timeline__visual {
  margin: clamp(32px, 4.5vw, 56px) 0 0;
}

.page-about .about-timeline__visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  border: 1px solid var(--bj-line);
  border-radius: var(--bj-radius-lg);
}

.page-about .about-timeline__list {
  position: relative;
  margin: clamp(36px, 5vw, 60px) 0 0;
  padding: 0 0 0 24px;
  list-style: none;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--bj-purple) 0%, var(--bj-teal) 52%, var(--bj-orange) 100%);
  opacity: 0.55;
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: clamp(30px, 4vw, 48px);
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -23px;
  top: 10px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bj-space);
  border: 2px solid var(--bj-purple-soft);
  box-shadow: 0 0 0 5px rgba(123, 92, 255, 0.14);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.page-about .about-timeline__item:hover::before,
.page-about .about-timeline__item:focus-within::before {
  border-color: var(--bj-teal);
  box-shadow: 0 0 0 7px rgba(46, 211, 183, 0.18);
}

.page-about .about-timeline__year {
  margin: 0 0 8px;
  font-family: var(--bj-font-mono);
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--bj-teal);
}

.page-about .about-timeline__card .bj-h3 {
  margin: 0 0 8px;
  color: var(--bj-white);
}

.page-about .about-timeline__card > p {
  margin: 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--bj-slate);
}

.page-about .about-timeline__detail {
  margin-top: 10px;
  padding-left: 12px;
  border-left: 2px solid var(--bj-line);
  font-size: 14px;
  line-height: 1.8;
  color: var(--bj-slate);
}

@media (min-width: 900px) {
  .page-about .about-timeline__list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: var(--about-tl-gap);
    padding-left: 0;
  }

  .page-about .about-timeline__list::before {
    left: 50%;
    top: 6px;
    bottom: 6px;
    transform: translateX(-50%);
  }

  .page-about .about-timeline__item {
    padding-bottom: clamp(36px, 4.4vw, 56px);
  }

  .page-about .about-timeline__item:nth-child(odd) {
    grid-column: 1;
    text-align: right;
  }

  .page-about .about-timeline__item:nth-child(even) {
    grid-column: 2;
    padding-top: clamp(40px, 5vw, 72px);
  }

  .page-about .about-timeline__item:nth-child(odd)::before {
    left: auto;
    right: calc(-1 * var(--about-tl-gap) / 2 - 7px);
  }

  .page-about .about-timeline__item:nth-child(even)::before {
    left: calc(-1 * var(--about-tl-gap) / 2 - 7px);
  }

  .page-about .about-timeline__item:nth-child(odd) .about-timeline__card > p {
    margin-left: auto;
  }

  .page-about .about-timeline__item:nth-child(odd) .about-timeline__detail {
    border-left: 0;
    border-right: 2px solid var(--bj-line);
    padding-left: 0;
    padding-right: 12px;
  }
}

@media (hover: hover) and (min-width: 900px) {
  .page-about .about-timeline__detail {
    max-height: 0;
    margin-top: 0;
    opacity: 0;
    overflow: hidden;
    border-left-color: transparent;
    transition: max-height 0.4s ease, opacity 0.3s ease, margin-top 0.35s ease, border-color 0.3s ease;
  }

  .page-about .about-timeline__item:nth-child(odd) .about-timeline__detail {
    border-right-color: transparent;
  }

  .page-about .about-timeline__item:hover .about-timeline__detail,
  .page-about .about-timeline__item:focus-within .about-timeline__detail {
    max-height: 220px;
    margin-top: 10px;
    opacity: 1;
    border-left-color: var(--bj-line-strong);
  }

  .page-about .about-timeline__item:nth-child(odd):hover .about-timeline__detail,
  .page-about .about-timeline__item:nth-child(odd):focus-within .about-timeline__detail {
    border-left-color: transparent;
    border-right-color: var(--bj-line-strong);
  }
}

/* ---------- 两条业务线 ---------- */

.page-about .about-lines__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
  margin-top: clamp(34px, 4.6vw, 56px);
}

.page-about .about-lines__card {
  position: relative;
  padding: clamp(26px, 3.4vw, 42px);
  border-radius: var(--bj-radius-lg);
  overflow: hidden;
}

.page-about .about-lines__card--content {
  border: 1px solid var(--bj-line);
  background: linear-gradient(158deg, rgba(123, 92, 255, 0.2) 0%, rgba(20, 26, 58, 0.94) 62%);
}

.page-about .about-lines__card--content .bj-h3 {
  margin: 10px 0 14px;
  color: var(--bj-white);
}

.page-about .about-lines__card--content > p {
  margin: 0;
  max-width: 46ch;
  line-height: 1.85;
  color: var(--bj-slate);
}

.page-about .about-lines__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: clamp(20px, 2.6vw, 28px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-lines__card--points {
  color: var(--about-paper-ink);
  background: var(--bj-paper);
  box-shadow: var(--bj-shadow-pop);
}

.page-about .about-lines__card--points .bj-plate__label {
  color: var(--about-paper-accent);
}

.page-about .about-lines__card--points .bj-h3 {
  margin: 10px 0 14px;
  color: var(--about-paper-ink);
}

.page-about .about-lines__card--points > p {
  margin: 0;
  line-height: 1.85;
  color: rgba(16, 20, 44, 0.78);
}

.page-about .about-lines__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: clamp(22px, 3vw, 30px);
  padding-top: clamp(18px, 2.4vw, 24px);
  border-top: 1px solid rgba(16, 20, 44, 0.14);
}

.page-about .about-lines__stats .bj-stat__value {
  display: block;
  font-family: var(--bj-font-mono);
  font-size: clamp(20px, 2.8vw, 28px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--about-paper-accent);
}

.page-about .about-lines__stats .bj-stat__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(16, 20, 44, 0.6);
}

.page-about .about-lines__foot {
  max-width: var(--bj-measure);
  margin: clamp(26px, 3.4vw, 40px) 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--bj-teal);
  font-size: 15px;
  line-height: 1.85;
  color: var(--bj-slate);
}

@media (min-width: 940px) {
  .page-about .about-lines__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: start;
  }

  .page-about .about-lines__card--points {
    margin-top: clamp(44px, 6vw, 88px);
  }
}

/* ---------- 团队 ---------- */

.page-about .about-team__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 40px);
}

.page-about .about-team__note {
  align-self: end;
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 2.4vw, 26px);
  margin-top: clamp(32px, 4.2vw, 50px);
}

.page-about .about-team__card {
  color: var(--about-paper-ink);
}

.page-about .about-team__card .bj-plate__label {
  color: var(--about-paper-accent);
}

.page-about .about-team__card .bj-h3 {
  margin: 10px 0 12px;
  color: var(--about-paper-ink);
}

.page-about .about-team__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(16, 20, 44, 0.76);
}

.page-about .about-team__visual {
  margin: clamp(32px, 4.4vw, 56px) 0 0;
}

.page-about .about-team__visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--bj-line);
  border-radius: var(--bj-radius-lg);
}

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

@media (min-width: 940px) {
  .page-about .about-team__head {
    grid-template-columns: minmax(0, 1.5fr) auto;
    align-items: end;
  }
}

@media (min-width: 1040px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-team__card:nth-child(2) {
    margin-top: 32px;
  }

  .page-about .about-team__card:nth-child(3) {
    margin-top: 64px;
  }
}

/* ---------- 覆盖范围 ---------- */

.page-about .about-reach__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 28px);
  margin-top: clamp(30px, 4vw, 46px);
}

.page-about .about-reach__stats .bj-stat__value {
  display: block;
  font-family: var(--bj-font-mono);
  font-size: clamp(24px, 3.6vw, 40px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--bj-white);
}

.page-about .about-reach__stats .bj-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--bj-slate);
}

.page-about .about-reach__chart {
  margin-top: clamp(32px, 4.2vw, 52px);
  padding: clamp(18px, 2.6vw, 30px);
  border: 1px solid var(--bj-line);
  border-radius: var(--bj-radius-lg);
  background: radial-gradient(130% 150% at 0% 100%, rgba(123, 92, 255, 0.24), transparent 64%), var(--bj-glass);
}

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

.page-about .about-reach__caption {
  margin: 14px 0 0;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--bj-slate);
}

@media (min-width: 880px) {
  .page-about .about-reach__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 合作与承诺 ---------- */

.page-about .about-partners__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  padding: clamp(28px, 4.2vw, 56px);
  border: 1px solid var(--bj-line);
  border-radius: var(--bj-radius-lg);
  background: linear-gradient(132deg, rgba(46, 211, 183, 0.14) 0%, rgba(123, 92, 255, 0.2) 50%, rgba(255, 107, 53, 0.12) 100%);
}

.page-about .about-partners__text .bj-h2 {
  margin-bottom: clamp(18px, 2.4vw, 26px);
}

.page-about .about-partners__text p {
  color: rgba(238, 242, 255, 0.82);
}

.page-about .about-partners__text p + p {
  margin-top: 16px;
}

.page-about .about-partners__actions {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
}

.page-about .about-partners__links {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .about-partners__links .bj-link-arrow {
  font-size: 14px;
}

@media (min-width: 940px) {
  .page-about .about-partners__inner {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.6fr);
    align-items: center;
  }
}

/* ---------- 滚动显现 ---------- */

.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 0.8, 0.3, 1);
}

.page-about [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-about .about-timeline__item::before {
    transition: none;
  }
}