.page-about {
  --ab-tick: rgba(217, 166, 90, .55);
  background: var(--oy-void);
  color: var(--oy-mist);
}

.page-about .ab-crumb {
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  font-size: var(--oy-fs-13);
}

/* ---------- 首屏 ---------- */

.page-about .ab-hero {
  position: relative;
  padding: clamp(22px, 4vw, 48px) 0 clamp(36px, 6vw, 76px);
  overflow: hidden;
  background:
    radial-gradient(120% 92% at 6% -12%, rgba(110, 75, 255, .32), transparent 56%),
    radial-gradient(88% 78% at 102% 8%, rgba(47, 233, 218, .11), transparent 62%),
    var(--oy-void);
}

.page-about .ab-frame {
  position: relative;
  padding: clamp(20px, 4.4vw, 54px) clamp(18px, 4vw, 52px);
  border: 1px solid var(--oy-line);
  border-radius: var(--oy-r-md);
  background: linear-gradient(155deg, rgba(18, 26, 60, .8) 0%, rgba(8, 13, 31, .44) 100%);
  box-shadow: var(--oy-shadow);
}

.page-about .ab-frame::before,
.page-about .ab-frame::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  border: 1px solid var(--oy-cyan);
  opacity: .7;
  pointer-events: none;
}

.page-about .ab-frame::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
  border-top-left-radius: var(--oy-r-md);
}

.page-about .ab-frame::after {
  right: -1px;
  bottom: -1px;
  border-left: 0;
  border-top: 0;
  border-bottom-right-radius: var(--oy-r-md);
}

.page-about .ab-hero__grid {
  display: grid;
  gap: clamp(16px, 2.6vw, 30px);
}

.page-about .ab-hero__kicker {
  margin: 0 0 14px;
  font-size: var(--oy-fs-12);
  letter-spacing: .34em;
  text-transform: uppercase;
  color: var(--oy-cyan);
}

.page-about .ab-hero__title {
  margin: 0 0 clamp(14px, 2vw, 22px);
  font-size: clamp(30px, 7.2vw, 84px);
  line-height: .98;
  font-weight: 900;
  letter-spacing: -.015em;
  color: var(--oy-mist);
}

.page-about .ab-hero__em {
  background: linear-gradient(102deg, var(--oy-cyan) 0%, var(--oy-violet) 92%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .ab-hero__lead {
  max-width: 62ch;
  margin: 0;
  font-size: var(--oy-fs-16);
  line-height: 1.78;
  color: var(--oy-slate);
}

.page-about .ab-hero__tag {
  font-family: var(--oy-mono);
  font-size: var(--oy-fs-12);
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--oy-bronze);
}

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: start;
    gap: 34px;
  }

  .page-about .ab-hero__tag {
    writing-mode: vertical-rl;
    justify-self: end;
    padding: 4px 10px 4px 0;
    border-right: 1px solid var(--ab-tick);
  }

  .page-about .ab-hero__lead {
    font-size: var(--oy-fs-18);
  }
}

.page-about .ab-pulse {
  display: flex;
  flex-wrap: wrap;
  gap: 16px clamp(18px, 3.2vw, 46px);
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: clamp(16px, 2.4vw, 24px) 0 0;
  list-style: none;
  border-top: 1px solid var(--oy-line);
}

.page-about .ab-pulse__k {
  display: block;
  margin-bottom: 5px;
  font-size: var(--oy-fs-12);
  letter-spacing: .16em;
  color: var(--oy-slate);
}

.page-about .ab-pulse__v {
  display: block;
  font-size: var(--oy-fs-24);
  font-weight: 700;
  line-height: 1;
  color: var(--oy-cyan);
}

/* ---------- 章节骨架 ---------- */

.page-about .ab-chapter {
  padding: clamp(44px, 7vw, 94px) 0;
  background: var(--oy-void);
}

.page-about .ab-chapter--indigo {
  background: var(--oy-indigo);
}

.page-about .ab-chapter--teal {
  background: var(--oy-teal);
}

.page-about .ab-chapter--wine {
  background: var(--oy-wine);
}

.page-about .ab-chapter__inner {
  display: grid;
  gap: 18px;
}

.page-about .ab-chapter__aside {
  display: flex;
  align-items: baseline;
  gap: 14px;
  min-width: 0;
}

.page-about .ab-chapter__num {
  font-family: var(--oy-mono);
  font-size: clamp(30px, 4vw, 46px);
  font-weight: 700;
  line-height: 1;
  color: var(--oy-bronze);
  text-decoration: none;
  transition: color .3s ease, text-shadow .3s ease;
}

.page-about .ab-chapter__num:hover,
.page-about .ab-chapter__num:focus-visible {
  color: var(--oy-cyan);
  text-shadow: 0 0 22px rgba(47, 233, 218, .45);
}

.page-about .ab-chapter__label {
  margin: 0;
  font-size: var(--oy-fs-12);
  letter-spacing: .2em;
  color: var(--oy-slate);
}

.page-about .ab-chapter__title {
  margin: 0 0 clamp(14px, 2vw, 22px);
  font-size: clamp(23px, 3.4vw, 34px);
  line-height: 1.24;
  font-weight: 800;
  color: var(--oy-mist);
}

.page-about .ab-chapter__body {
  min-width: 0;
}

.page-about .ab-chapter__body > p {
  max-width: 64ch;
  margin: 0 0 1.05em;
  font-size: var(--oy-fs-16);
  line-height: 1.78;
  color: rgba(233, 239, 255, .82);
}

.page-about .ab-chapter__body > p:last-child {
  margin-bottom: 0;
}

@media (min-width: 900px) {
  .page-about .ab-chapter__inner {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 72px);
  }

  .page-about .ab-chapter__aside {
    display: block;
    position: sticky;
    top: 118px;
    align-self: start;
  }

  .page-about .ab-chapter__label {
    margin-top: 10px;
  }
}

.page-about .ab-pull {
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 16px 20px;
  border-left: 2px solid var(--oy-cyan);
  border-radius: 0 var(--oy-r-sm) var(--oy-r-sm) 0;
  background: linear-gradient(90deg, rgba(47, 233, 218, .09), rgba(47, 233, 218, 0) 78%);
}

.page-about .ab-pull p {
  margin: 0;
  font-size: clamp(16px, 1.9vw, 20px);
  line-height: 1.62;
  color: var(--oy-mist);
}

/* ---------- 通用图片 ---------- */

.page-about .ab-figure {
  margin: 0;
  min-width: 0;
}

.page-about .ab-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--oy-line);
  border-radius: var(--oy-r-md);
  object-fit: cover;
  background: var(--oy-indigo);
}

.page-about .ab-figure__cap {
  margin-top: 10px;
  font-family: var(--oy-mono);
  font-size: var(--oy-fs-12);
  letter-spacing: .14em;
  color: var(--oy-slate);
}

/* ---------- 02 流水线 ---------- */

.page-about .ab-flowwrap {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .ab-flow {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .ab-flow__stage {
  position: relative;
  padding: 18px 20px 18px 28px;
  border: 1px solid var(--oy-line);
  border-radius: var(--oy-r-md);
  background: rgba(8, 13, 31, .52);
  box-shadow: var(--oy-shadow);
  outline: none;
  transition: transform .35s ease, border-color .35s ease, box-shadow .35s ease;
}

.page-about .ab-flow__stage::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 20px;
  bottom: 20px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--oy-cyan), var(--oy-violet));
}

.page-about .ab-flow__stage:hover,
.page-about .ab-flow__stage:focus,
.page-about .ab-flow__stage:focus-visible {
  transform: translateY(-4px);
  border-color: var(--oy-line-strong);
  box-shadow: var(--oy-shadow-lift);
}

.page-about .ab-flow__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 8px;
}

.page-about .ab-flow__no {
  font-size: var(--oy-fs-13);
  letter-spacing: .2em;
  color: var(--oy-bronze);
}

.page-about .ab-flow__title {
  margin: 0;
  font-size: var(--oy-fs-18);
  font-weight: 800;
  color: var(--oy-mist);
}

.page-about .ab-flow__brief {
  margin: 0;
  font-size: var(--oy-fs-16);
  line-height: 1.7;
  color: var(--oy-slate);
}

.page-about .ab-flow__note {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height .45s ease, opacity .35s ease, margin-top .45s ease;
}

.page-about .ab-flow__stage:hover .ab-flow__note,
.page-about .ab-flow__stage:focus .ab-flow__note,
.page-about .ab-flow__stage:focus-visible .ab-flow__note {
  max-height: 240px;
  opacity: 1;
  margin-top: 12px;
}

.page-about .ab-flow__note p {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed var(--oy-line);
  font-size: var(--oy-fs-13);
  line-height: 1.72;
  color: var(--oy-slate);
}

@media (min-width: 1000px) {
  .page-about .ab-flowwrap {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    align-items: start;
  }

  .page-about .ab-flow__media {
    position: sticky;
    top: 118px;
  }
}

/* ---------- 03 服务对象 ---------- */

.page-about .ab-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  width: fit-content;
  max-width: 100%;
  margin: clamp(16px, 2.4vw, 26px) 0 clamp(20px, 3vw, 30px);
  padding: 8px;
  border: 1px solid var(--oy-line);
  border-radius: var(--oy-r-pill);
  background: rgba(8, 13, 31, .48);
}

.page-about .ab-roles {
  display: grid;
  gap: var(--oy-gap);
  grid-template-columns: minmax(0, 1fr);
}

.page-about .ab-role {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--oy-line);
  border-radius: var(--oy-r-md);
  background: rgba(8, 13, 31, .52);
  box-shadow: var(--oy-shadow);
  transition: transform .35s ease, border-color .35s ease, box-shadow .35s ease;
}

.page-about .ab-role:hover {
  transform: translateY(-4px);
  border-color: var(--oy-line-strong);
  box-shadow: var(--oy-shadow-lift);
}

.page-about .ab-role__tag {
  margin: 0;
  font-size: var(--oy-fs-12);
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--oy-orange);
}

.page-about .ab-role__title {
  margin: 0;
  font-size: var(--oy-fs-18);
  font-weight: 800;
  line-height: 1.4;
  color: var(--oy-mist);
}

.page-about .ab-role__text {
  margin: 0;
  font-size: var(--oy-fs-16);
  line-height: 1.75;
  color: var(--oy-slate);
}

@media (min-width: 680px) {
  .page-about .ab-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 04 团队 ---------- */

.page-about .ab-banner {
  margin: clamp(18px, 2.6vw, 28px) 0 clamp(22px, 3.2vw, 34px);
}

.page-about .ab-team {
  display: grid;
  gap: 14px;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .ab-teammate {
  border: 1px solid var(--oy-line);
  border-radius: var(--oy-r-md);
  background: rgba(8, 13, 31, .42);
  transition: border-color .3s ease, transform .3s ease;
}

.page-about .ab-teammate:hover,
.page-about .ab-teammate[open] {
  border-color: var(--oy-line-strong);
  transform: translateY(-4px);
}

.page-about .ab-teammate__sum {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 6px 12px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
}

.page-about .ab-teammate__sum::-webkit-details-marker {
  display: none;
}

.page-about .ab-teammate__sum::marker {
  content: "";
}

.page-about .ab-teammate__role {
  font-size: var(--oy-fs-16);
  font-weight: 700;
  color: var(--oy-mist);
}

.page-about .ab-teammate__figure {
  display: inline-flex;
  align-items: baseline;
  gap: 3px;
  white-space: nowrap;
}

.page-about .ab-teammate__count {
  font-size: var(--oy-fs-24);
  font-weight: 700;
  line-height: 1;
  color: var(--oy-cyan);
}

.page-about .ab-teammate__unit {
  font-size: var(--oy-fs-13);
  color: var(--oy-slate);
}

.page-about .ab-teammate__body {
  margin: 0 20px;
  padding: 14px 0 20px;
  border-top: 1px dashed var(--oy-line);
}

.page-about .ab-teammate__body p {
  margin: 0;
  font-size: var(--oy-fs-13);
  line-height: 1.72;
  color: var(--oy-slate);
}

@media (min-width: 760px) {
  .page-about .ab-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 05 合作与认可 ---------- */

.page-about .ab-coop {
  display: grid;
  gap: var(--oy-gap);
  grid-template-columns: minmax(0, 1fr);
  margin-top: clamp(18px, 2.6vw, 28px);
}

.page-about .ab-coop__item {
  padding: clamp(18px, 2.4vw, 24px);
  border: 1px solid rgba(233, 239, 255, .15);
  border-radius: var(--oy-r-md);
  background: rgba(8, 13, 31, .4);
}

.page-about .ab-coop__num {
  margin: 0;
  font-size: var(--oy-fs-34);
  font-weight: 700;
  line-height: 1;
  color: var(--oy-orange);
}

.page-about .ab-coop__title {
  margin: 12px 0 8px;
  font-size: var(--oy-fs-18);
  font-weight: 800;
  color: var(--oy-mist);
}

.page-about .ab-coop__text {
  margin: 0;
  font-size: var(--oy-fs-16);
  line-height: 1.72;
  color: var(--oy-slate);
}

.page-about .ab-honor {
  list-style: none;
  display: grid;
  gap: 10px;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
}

.page-about .ab-honor li {
  padding: 14px 16px;
  border-left: 2px solid var(--ab-tick);
  border-radius: 0 var(--oy-r-sm) var(--oy-r-sm) 0;
  background: rgba(217, 166, 90, .08);
  font-size: var(--oy-fs-16);
  line-height: 1.72;
  color: rgba(233, 239, 255, .87);
}

@media (min-width: 760px) {
  .page-about .ab-coop {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 06 时间线 ---------- */

.page-about .ab-time-wrap {
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .ab-img--tall {
  object-fit: cover;
}

.page-about .ab-timeline {
  position: relative;
  min-width: 0;
  margin: 0;
  padding: 0 0 0 26px;
  list-style: none;
}

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  opacity: .6;
  background: linear-gradient(180deg, var(--oy-cyan), var(--oy-violet) 55%, rgba(217, 166, 90, .6));
}

.page-about .ab-timeline__item {
  position: relative;
  padding-bottom: clamp(16px, 2.4vw, 26px);
}

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

.page-about .ab-timeline__item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--oy-void);
  border: 2px solid var(--oy-cyan);
  box-shadow: 0 0 0 4px rgba(47, 233, 218, .12);
}

.page-about .ab-timeline__sum {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 12px;
  cursor: pointer;
  list-style: none;
  font-size: var(--oy-fs-18);
  font-weight: 800;
  line-height: 1.45;
  color: var(--oy-mist);
  transition: color .3s ease;
}

.page-about .ab-timeline__sum::-webkit-details-marker {
  display: none;
}

.page-about .ab-timeline__sum::marker {
  content: "";
}

.page-about .ab-timeline__sum:hover,
.page-about .ab-timeline__sum:focus-visible {
  color: var(--oy-cyan);
}

.page-about .ab-timeline__phase {
  font-size: var(--oy-fs-13);
  font-weight: 500;
  letter-spacing: .18em;
  color: var(--oy-bronze);
}

.page-about .ab-timeline__panel p {
  max-width: 58ch;
  margin: 10px 0 0;
  font-size: var(--oy-fs-16);
  line-height: 1.76;
  color: var(--oy-slate);
}

@media (min-width: 900px) {
  .page-about .ab-time-wrap {
    grid-template-columns: minmax(0, .6fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .ab-time-media {
    position: sticky;
    top: 118px;
  }
}

/* ---------- 尾段入口 ---------- */

.page-about .ab-next {
  padding: clamp(38px, 6vw, 76px) 0 clamp(46px, 7vw, 88px);
  border-top: 1px solid var(--oy-line);
  background:
    radial-gradient(110% 100% at 92% 0%, rgba(110, 75, 255, .2), transparent 58%),
    var(--oy-void);
}

.page-about .ab-next__title {
  margin: 0 0 10px;
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 800;
  color: var(--oy-mist);
}

.page-about .ab-next__lead {
  max-width: 60ch;
  margin: 0 0 clamp(20px, 3vw, 30px);
  font-size: var(--oy-fs-16);
  line-height: 1.76;
  color: var(--oy-slate);
}

.page-about .ab-next__list {
  list-style: none;
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
}

.page-about .ab-next__link {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 16px 18px;
  border: 1px solid var(--oy-line);
  border-radius: var(--oy-r-md);
  background: rgba(18, 26, 60, .42);
  text-decoration: none;
  transition: transform .3s ease, border-color .3s ease, background .3s ease;
}

.page-about .ab-next__link:hover,
.page-about .ab-next__link:focus-visible {
  transform: translateY(-4px);
  border-color: var(--oy-line-strong);
  background: rgba(18, 26, 60, .74);
}

.page-about .ab-next__name {
  font-size: var(--oy-fs-18);
  font-weight: 800;
  color: var(--oy-cyan);
}

.page-about .ab-next__desc {
  font-size: var(--oy-fs-13);
  line-height: 1.62;
  color: var(--oy-slate);
}

@media (min-width: 760px) {
  .page-about .ab-next__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-flow__stage,
  .page-about .ab-role,
  .page-about .ab-teammate,
  .page-about .ab-next__link,
  .page-about .ab-flow__note,
  .page-about .ab-chapter__num {
    transition: none;
  }

  .page-about .ab-flow__stage:hover,
  .page-about .ab-flow__stage:focus,
  .page-about .ab-role:hover,
  .page-about .ab-teammate:hover,
  .page-about .ab-teammate[open],
  .page-about .ab-next__link:hover {
    transform: none;
  }
}