.page-about {
  --about-line: rgba(135, 146, 184, .20);
  position: relative;
  color: var(--text-soft);
}

.page-about .wrap {
  position: relative;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  padding: 18px 0 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 32px 0 8px;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(58% 48% at 8% 0%, rgba(53, 232, 208, .10), transparent 70%),
    radial-gradient(46% 42% at 100% 16%, rgba(255, 138, 61, .09), transparent 72%),
    radial-gradient(40% 40% at 60% 110%, rgba(108, 77, 255, .10), transparent 70%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  position: relative;
}

.page-about .h1 {
  margin: 12px 0 16px;
  font-family: var(--f-display);
  font-weight: 400;
  font-size: clamp(2.05rem, 8vw, 3.5rem);
  line-height: 1.06;
  letter-spacing: -.012em;
  color: var(--white);
}

.page-about .lede {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text-soft);
  max-width: 60ch;
}

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

.page-about .about-hero__board {
  position: relative;
  padding: 22px 20px 24px;
  border: 1px solid var(--about-line);
  background: linear-gradient(160deg, rgba(16, 26, 58, .92), rgba(10, 15, 36, .55));
  box-shadow: 0 18px 48px rgba(5, 8, 20, .55);
}

.page-about .about-hero__board::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 58px;
  background: linear-gradient(180deg, var(--cyan), rgba(53, 232, 208, 0));
}

.page-about .about-board__eyebrow {
  margin: 0 0 18px;
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .about-board__grid {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 14px;
}

.page-about .about-board__grid > div {
  border-top: 1px solid var(--about-line);
  padding-top: 10px;
}

.page-about .about-board__grid dt {
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--muted);
}

.page-about .about-board__grid dd {
  margin: 6px 0 0;
  font-size: 1.3125rem;
  letter-spacing: -.01em;
  color: var(--cyan);
}

.page-about .about-board__grid > div:nth-child(2n) dd {
  color: var(--orange);
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  position: relative;
  padding: 68px 0;
}

.page-about .about-sec + .about-sec::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--about-line) 10%, var(--about-line) 90%, transparent);
}

.page-about .about-head {
  max-width: 780px;
  margin-bottom: 36px;
}

.page-about .h2 {
  margin: 0 0 14px;
  font-family: var(--f-display);
  font-weight: 400;
  font-size: clamp(1.5rem, 5.4vw, 2.25rem);
  line-height: 1.15;
  letter-spacing: -.008em;
  color: var(--white);
}

.page-about .about-head__lede {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text-soft);
}

.page-about .prose {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text-soft);
}

/* ---------- 01 时间轴 ---------- */
.page-about .about-tl-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.page-about .about-tl {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-tl__item {
  display: grid;
  grid-template-columns: 3rem 1.5rem minmax(0, 1fr);
}

.page-about .about-tl__year {
  padding-top: 1px;
  text-align: right;
  font-size: .8125rem;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-about .about-tl__track {
  position: relative;
}

.page-about .about-tl__track::before {
  content: "";
  position: absolute;
  left: 50%;
  margin-left: -.5px;
  top: .5rem;
  bottom: 0;
  width: 1px;
  background: var(--about-line);
}

.page-about .about-tl__track::after {
  content: "";
  position: absolute;
  left: 50%;
  top: .32rem;
  width: 9px;
  height: 9px;
  margin-left: -4.5px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(53, 232, 208, .13);
}

.page-about .about-tl__item:last-child .about-tl__track::before {
  bottom: auto;
  height: .8rem;
}

.page-about .about-tl__item:last-child .about-tl__track::after {
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 138, 61, .16);
}

.page-about .about-tl__body {
  padding: 0 0 30px 6px;
}

.page-about .about-tl__title {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--white);
}

.page-about .about-tl__note {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
}

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

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

/* ---------- 02 服务范围 ---------- */
.page-about .about-scope__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
}

.page-about .about-facts {
  list-style: none;
  margin: 22px 0 24px;
  padding: 0;
}

.page-about .about-facts li {
  display: flex;
  gap: 14px;
  padding: 11px 0;
  border-top: 1px solid var(--about-line);
  font-size: 14.5px;
  line-height: 1.75;
}

.page-about .about-facts li:last-child {
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-facts .mono {
  flex: 0 0 auto;
  min-width: 4rem;
  padding-top: 2px;
  font-size: .8125rem;
  letter-spacing: .06em;
  color: var(--orange);
}

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

/* ---------- 03 订阅理念 ---------- */
.page-about .about-sub__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .about-sub__steps li {
  padding: 24px 20px 26px;
  background: linear-gradient(180deg, rgba(16, 26, 58, .72), rgba(10, 15, 36, .58));
}

.page-about .about-sub__k {
  margin: 0 0 14px;
  font-size: .8125rem;
  letter-spacing: .12em;
  color: var(--green);
}

.page-about .about-sub__t {
  margin: 0 0 8px;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--white);
}

.page-about .about-sub__d {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
}

.page-about .about-sub__foot {
  margin-top: 30px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}

/* ---------- 04 排名查询 ---------- */
.page-about .about-rank__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

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

.page-about .about-rank__dims {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-rank__dims li {
  display: grid;
  grid-template-columns: 2.25rem minmax(0, 1fr);
  gap: 12px;
  padding: 15px 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-rank__dims li:last-child {
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-rank__dims .mono {
  padding-top: 2px;
  font-size: .8125rem;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .about-rank__dims strong {
  display: block;
  margin-bottom: 5px;
  font-size: .95rem;
  font-weight: 600;
  color: var(--white);
}

.page-about .about-rank__dims span {
  display: block;
  font-size: 14px;
  line-height: 1.72;
}

.page-about .about-rank__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

/* ---------- 05 团队与运营 ---------- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
}

.page-about .about-team__roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--about-line);
  border-top: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-team__roles li {
  padding: 18px 0;
  background: transparent;
}

.page-about .about-team__roles .mono {
  display: block;
  margin-bottom: 6px;
  font-size: .8125rem;
  letter-spacing: .1em;
  color: var(--blue);
}

.page-about .about-team__roles p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
}

/* ---------- 06 合作与运营规范 ---------- */
.page-about .about-eco__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--about-line);
  border-top: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-eco__item {
  padding: 24px 0 26px;
  background: transparent;
}

.page-about .about-eco__num {
  margin: 0 0 10px;
  font-size: 1.625rem;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.page-about .about-eco__item:nth-child(2) .about-eco__num {
  color: var(--orange);
}

.page-about .about-eco__item:nth-child(3) .about-eco__num {
  color: var(--green);
}

.page-about .about-eco__item:nth-child(4) .about-eco__num {
  color: var(--violet);
}

.page-about .h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--white);
}

.page-about .about-eco__item p:last-child {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
}

/* ---------- 行动区 ---------- */
.page-about .about-cta {
  padding-bottom: 88px;
}

.page-about .about-cta__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  padding: 32px 24px 34px;
  border: 1px solid var(--about-line);
  background:
    linear-gradient(118deg, rgba(61, 107, 255, .16), rgba(108, 77, 255, .07) 46%, rgba(255, 138, 61, .14));
  box-shadow: 0 20px 56px rgba(5, 8, 20, .5);
}

.page-about .about-cta__note {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.8;
  letter-spacing: .02em;
  color: var(--muted);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-board__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-tl__item {
    grid-template-columns: 3.5rem 1.75rem minmax(0, 1fr);
  }

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

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

  .page-about .about-eco__item {
    padding: 24px 22px 26px;
  }

  .page-about .about-eco__item:nth-child(2n) {
    padding-right: 0;
  }
}

@media (min-width: 900px) {
  .page-about .about-scope__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .8fr);
    gap: 64px;
    align-items: center;
  }

  .page-about .about-rank__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: 56px;
    align-items: center;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: 64px;
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding: 46px 0 12px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 64px;
    align-items: end;
  }

  .page-about .about-sec {
    padding: 104px 0;
  }

  .page-about .about-head {
    margin-bottom: 48px;
  }

  .page-about .about-tl-layout {
    grid-template-columns: minmax(0, 1.22fr) minmax(0, .78fr);
    gap: 64px;
    align-items: start;
  }

  .page-about .about-sub__steps li {
    padding: 28px 26px 30px;
  }

  .page-about .about-eco__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-eco__item:nth-child(2n) {
    padding-right: 22px;
  }

  .page-about .about-eco__item {
    padding: 28px 22px 30px;
    border-left: 1px solid var(--about-line);
  }

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

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

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 40px;
    padding: 44px 40px 46px;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    animation-duration: .001ms !important;
    transition-duration: .001ms !important;
  }
}