.page-about {
  --about-panel-line: 1px solid var(--line);
  --about-soft-text: rgba(232, 237, 245, .78);
}

.page-about .about-crumbs {
  padding-block: clamp(12px, 2.5vw, 22px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(6px, 2vw, 18px) clamp(40px, 7vw, 86px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -24% -12% auto auto;
  width: min(620px, 92vw);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 58% 42%, rgba(61, 242, 255, .18), rgba(255, 59, 200, .07) 46%, transparent 68%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: clamp(28px, 5vw, 48px);
  align-items: start;
}

.page-about .about-kicker {
  margin: 0 0 clamp(14px, 2.6vw, 20px);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--amber);
}

.page-about h1 {
  margin: 0 0 clamp(16px, 3vw, 24px);
  font-family: var(--font-display);
  font-size: clamp(33px, 7.6vw, 64px);
  line-height: 1.06;
  letter-spacing: .045em;
  color: var(--bone);
}

.page-about .about-lead {
  margin: 0;
  max-width: 46ch;
  font-size: clamp(15.5px, 2.2vw, 18px);
  line-height: 1.8;
  color: var(--about-soft-text);
}

.page-about .about-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__hint {
  margin: clamp(16px, 3vw, 24px) 0 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--gray);
}

.page-about .about-hero__hint a,
.page-about .about-rail__note a,
.page-about .about-cadence__note a,
.page-about .about-cta__links a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 242, 255, .42);
  padding-bottom: 1px;
}

.page-about .about-hero__hint a:hover,
.page-about .about-rail__note a:hover,
.page-about .about-cadence__note a:hover,
.page-about .about-cta__links a:hover {
  border-bottom-color: var(--cyan);
  color: var(--bone);
}

.page-about .about-hero__panel {
  padding: clamp(20px, 4vw, 32px);
  border: var(--about-panel-line);
  border-radius: var(--r-lg);
  background: linear-gradient(165deg, rgba(23, 32, 51, .92), rgba(14, 22, 38, .92));
}

.page-about .about-dial {
  position: relative;
  display: grid;
  place-items: center;
  width: min(220px, 62vw);
  aspect-ratio: 1 / 1;
  margin: 0 auto clamp(20px, 3.4vw, 28px);
  border-radius: 50%;
  background: conic-gradient(from 205deg, rgba(61, 242, 255, .92), rgba(255, 59, 200, .55) 36%, rgba(255, 184, 77, .9) 64%, rgba(61, 242, 255, .16) 82%, rgba(61, 242, 255, .92));
}

.page-about .about-dial::before {
  content: "";
  position: absolute;
  inset: 7%;
  border-radius: 50%;
  background: var(--void);
  border: var(--about-panel-line);
}

.page-about .about-dial__core {
  position: relative;
  display: grid;
  gap: 4px;
  text-align: center;
}

.page-about .about-dial__ver {
  font-size: clamp(26px, 6vw, 32px);
  color: var(--bone);
  letter-spacing: .04em;
}

.page-about .about-dial__cap {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gray);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--line);
  border: var(--about-panel-line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-facts__cell {
  padding: 14px 16px;
  background: var(--abyss);
}

.page-about .about-facts dt {
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--gray);
}

.page-about .about-facts dd {
  margin: 6px 0 0;
  font-size: clamp(19px, 3.4vw, 24px);
  color: var(--cyan);
  letter-spacing: .02em;
}

.page-about .about-panel__note {
  margin: clamp(14px, 2.4vw, 20px) 0 0;
  padding-top: 14px;
  border-top: 1px dashed rgba(139, 149, 167, .34);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--gray);
}

/* ---------- 通用：窄栏索引 ---------- */
.page-about .about-rail__idx {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--magenta);
}

.page-about .about-rail__note {
  margin: 14px 0 0;
  max-width: 42ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--gray);
}

.page-about h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 4.6vw, 40px);
  line-height: 1.16;
  letter-spacing: .04em;
  color: var(--bone);
}

/* ---------- 历程 ---------- */
.page-about .about-years__grid {
  display: grid;
  gap: clamp(26px, 4.4vw, 48px);
}

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

.page-about .about-track__item {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: clamp(10px, 2.4vw, 22px);
  padding-bottom: clamp(20px, 3.6vw, 32px);
}

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

.page-about .about-track__stamp {
  padding-top: 3px;
  font-size: 13.5px;
  letter-spacing: .06em;
  color: var(--amber);
}

.page-about .about-track__body {
  position: relative;
  padding-left: clamp(14px, 2.6vw, 24px);
  border-left: 1px solid var(--line-strong);
}

.page-about .about-track__body::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 9px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(61, 242, 255, .13);
}

.page-about .about-track__body h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(17px, 2.6vw, 21px);
  letter-spacing: .04em;
  color: var(--bone);
}

.page-about .about-track__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-soft-text);
}

/* ---------- 团队 ---------- */
.page-about .about-team__head {
  max-width: 62ch;
  margin-bottom: clamp(24px, 4vw, 40px);
}

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

.page-about .about-team__grid {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  align-items: start;
}

.page-about .about-role {
  margin: 0 0 10px;
  padding: clamp(15px, 2.6vw, 22px);
  border: var(--about-panel-line);
  border-radius: var(--r-md);
  background: var(--slate);
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-about .about-role:hover {
  border-color: rgba(61, 242, 255, .38);
}

.page-about .about-role[open] {
  border-color: rgba(61, 242, 255, .5);
  background: linear-gradient(155deg, rgba(61, 242, 255, .09), rgba(23, 32, 51, .96) 58%);
}

.page-about .about-role summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-role summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 4px;
  border-radius: 6px;
}

.page-about .about-role__idx {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-about .about-role__name {
  flex: 1;
  font-family: var(--font-display);
  font-size: clamp(16.5px, 2.5vw, 20px);
  letter-spacing: .05em;
  color: var(--bone);
}

.page-about .about-role summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--amber);
}

.page-about .about-role[open] summary::after {
  content: "–";
}

.page-about .about-role__duty {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--about-soft-text);
}

.page-about .about-role__list {
  margin: 10px 0 0;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--gray);
}

.page-about .about-role__list li::marker {
  color: var(--magenta);
}

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

/* ---------- 工作流 ---------- */
.page-about .about-flow__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-about .about-flow__steps {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .about-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 3vw, 28px);
  padding: clamp(18px, 3vw, 26px) 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-step__num {
  font-size: clamp(22px, 4.4vw, 32px);
  line-height: 1;
  letter-spacing: .05em;
  color: var(--amber);
}

.page-about .about-step__text h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(17px, 2.6vw, 21px);
  letter-spacing: .05em;
  color: var(--bone);
}

.page-about .about-step__text p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-soft-text);
}

.page-about .about-flow__media {
  margin: clamp(22px, 3.6vw, 32px) 0 0;
}

/* ---------- 合作与荣誉 ---------- */
.page-about .about-coop__grid {
  display: grid;
  gap: clamp(26px, 4.4vw, 44px);
  align-items: start;
}

.page-about .about-coop__lead {
  margin: 16px 0 clamp(20px, 3.2vw, 28px);
  max-width: 52ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--gray);
}

.page-about .about-coop__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
  margin: 0 0 clamp(24px, 4vw, 34px);
  padding: 0;
  list-style: none;
}

.page-about .about-coop__stat {
  padding: 16px;
  border: var(--about-panel-line);
  border-radius: var(--r-md);
  background: linear-gradient(158deg, rgba(61, 242, 255, .1), rgba(14, 22, 38, .9) 62%);
  transition: border-color .2s var(--ease), transform .2s var(--ease);
}

.page-about .about-coop__stat:hover {
  border-color: rgba(61, 242, 255, .55);
}

.page-about .about-coop__num {
  display: block;
  font-size: clamp(26px, 4.6vw, 34px);
  line-height: 1.1;
  color: var(--bone);
}

.page-about .about-coop__num span {
  margin-left: 3px;
  font-size: .48em;
  color: var(--cyan);
}

.page-about .about-coop__label {
  display: block;
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--gray);
}

.page-about .about-coop__subtitle {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: clamp(17px, 2.6vw, 21px);
  letter-spacing: .05em;
  color: var(--bone);
}

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

.page-about .about-award {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 14px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-award__year {
  font-size: 14px;
  color: var(--amber);
  letter-spacing: .06em;
}

.page-about .about-award p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-soft-text);
}

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

/* ---------- 节奏 ---------- */
.page-about .about-cadence__head {
  max-width: 56ch;
  margin-bottom: clamp(20px, 3.4vw, 32px);
}

.page-about .about-cadence__rows {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-cadence__row {
  display: grid;
  gap: 6px;
  padding: clamp(14px, 2.6vw, 20px) clamp(16px, 3vw, 24px);
  background: var(--abyss);
}

.page-about .about-cadence__label {
  font-size: 13.5px;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-about .about-cadence__value {
  font-size: 15px;
  line-height: 1.75;
  color: var(--about-soft-text);
}

.page-about .about-cadence__note {
  margin: clamp(16px, 2.8vw, 22px) 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--gray);
}

/* ---------- 结尾联系 ---------- */
.page-about .about-cta__grid {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  align-items: start;
}

.page-about .about-cta__copy p {
  margin: 16px 0 0;
  max-width: 48ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--about-soft-text);
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: clamp(18px, 3vw, 26px) !important;
  font-size: 14.5px;
}

.page-about .about-cta__card {
  padding: clamp(20px, 3.4vw, 30px);
  border: 1px solid rgba(255, 184, 77, .34);
  border-radius: var(--r-lg);
  background: linear-gradient(158deg, rgba(255, 184, 77, .1), rgba(14, 22, 38, .96) 54%);
}

.page-about .about-cta__card-title {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--amber);
}

.page-about .about-cta__list {
  margin: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-cta__list dt {
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--gray);
}

.page-about .about-cta__list dd {
  margin: 5px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--bone);
  word-break: break-word;
}

.page-about .about-cta__list dd a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 242, 255, .4);
}

.page-about .about-cta__list dd a:hover {
  color: var(--bone);
  border-bottom-color: var(--cyan);
}

.page-about .about-cta__note {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px dashed rgba(139, 149, 167, .34);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--gray);
}

/* ---------- 桌面栅格 ---------- */
@media (min-width: 860px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(34px, 5vw, 72px);
  }

  .page-about .about-years__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .about-track__item {
    grid-template-columns: 66px minmax(0, 1fr);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-flow__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .about-coop__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(32px, 5vw, 56px);
  }

  .page-about .about-cadence__row {
    grid-template-columns: 168px minmax(0, 1fr);
    align-items: baseline;
    gap: 24px;
  }

  .page-about .about-cta__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(32px, 5vw, 64px);
  }
}

@media (min-width: 1080px) {
  .page-about .about-award {
    grid-template-columns: 72px minmax(0, 1fr);
  }
}

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