.page-about {
  --about-gap: clamp(22px, 3.4vw, 44px);
  --about-pad: clamp(52px, 8vw, 108px);
  --about-title-ink: var(--bone);
  display: block;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(28px, 5vw, 56px) clamp(48px, 7vw, 88px);
  position: relative;
}

.page-about .breadcrumb {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  margin-bottom: clamp(24px, 3.5vw, 44px);
}

.page-about .breadcrumb__now {
  color: var(--lime);
}

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

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(30px, 6.4vw, 54px);
  line-height: 1.14;
  letter-spacing: -0.012em;
  margin: 10px 0 0;
  color: var(--bone);
}

.page-about .about-hero__title::after {
  content: "";
  display: block;
  width: 84px;
  height: 3px;
  margin-top: 20px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--violet), var(--magenta) 55%, var(--cyan));
}

.page-about .about-hero__lede {
  margin-top: 22px;
  max-width: 42em;
  color: rgba(233, 227, 213, .86);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(26px, 3.5vw, 40px) 0 0;
  background: var(--rule);
  border: 1px solid var(--rule);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-stat {
  background: var(--slate);
  padding: 16px 18px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-stat__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: .04em;
  color: rgba(233, 227, 213, .62);
}

.page-about .about-stat__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(20px, 3.6vw, 26px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--lime);
}

.page-about .about-hero__media {
  align-self: center;
}

/* ---------- 底色节奏 ---------- */
.page-about .about-band {
  padding-block: var(--about-pad);
  position: relative;
}

.page-about .about-band--bone {
  background: var(--bone);
  color: var(--ink);
  border-radius: clamp(18px, 3vw, 32px);
}

.page-about .about-band--bone .chapter__title,
.page-about .about-band--bone .about-axis__title,
.page-about .about-band--bone .about-step__title,
.page-about .about-band--bone .about-cadence__title,
.page-about .about-band--bone .about-role__title,
.page-about .about-band--bone .about-partners__title {
  color: var(--ink);
}

.page-about .about-band--bone .chapter__num {
  color: var(--clay);
}

.page-about .about-band--bone .chapter__rule {
  background: linear-gradient(90deg, rgba(14, 17, 22, .28), rgba(14, 17, 22, 0));
}

.page-about .about-band--bone .prose {
  color: rgba(14, 17, 22, .82);
}

.page-about .about-band--dark .prose {
  color: rgba(233, 227, 213, .82);
}

.page-about .about-intro-p {
  margin-top: clamp(20px, 3vw, 32px);
  max-width: 40em;
}

/* ---------- 01 起点 ---------- */
.page-about .about-origin {
  margin-top: clamp(24px, 3.6vw, 44px);
}

.page-about .about-origin__body p {
  margin: 0 0 18px;
}

.page-about .about-origin__body p:last-child {
  margin-bottom: 0;
}

.page-about .about-origin__side {
  align-self: start;
  margin-top: 8px;
  padding: 22px 22px 24px;
  border-radius: var(--r-md);
  background: rgba(124, 139, 107, .16);
  border-inline-start: 4px solid var(--moss);
}

.page-about .about-origin__label {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--clay);
}

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

.page-about .about-origin__list li {
  position: relative;
  padding-inline-start: 20px;
  font-size: 15px;
  line-height: 1.65;
  color: rgba(14, 17, 22, .84);
}

.page-about .about-origin__list li::before {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  top: .62em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--clay);
}

.page-about .about-origin__note {
  margin: 18px 0 0;
  font-size: 13px;
  color: rgba(14, 17, 22, .58);
}

/* ---------- 02 分类 ---------- */
.page-about .about-axes {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(26px, 4vw, 44px);
  background: var(--rule);
  border: 1px solid var(--rule);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .about-axis {
  background: var(--slate);
  padding: 24px 22px 26px;
  transition: background 160ms var(--ease);
}

.page-about .about-axis:hover {
  background: #232A33;
}

.page-about .about-axis__idx {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--violet);
  border: 1px solid rgba(168, 85, 247, .42);
  border-radius: 6px;
  padding: 3px 8px;
}

.page-about .about-axis__title {
  margin: 14px 0 10px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.01em;
  color: var(--bone);
}

.page-about .about-axis p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(233, 227, 213, .74);
}

.page-about .about-bands-wrap {
  margin-top: clamp(30px, 4.6vw, 56px);
  align-items: center;
}

.page-about .about-bands {
  margin: 0;
  padding: 22px 22px 24px;
  border-radius: var(--r-lg);
  background: linear-gradient(155deg, rgba(168, 85, 247, .16), rgba(34, 211, 238, .08) 70%, rgba(255, 61, 190, .1));
  border: 1px solid var(--rule);
}

.page-about .about-bands__cap {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-bands__row {
  display: grid;
  grid-template-columns: repeat(9, minmax(0, 1fr));
  gap: 5px;
  height: 72px;
}

.page-about .about-bands__row i {
  display: block;
  border-radius: 7px;
  background: linear-gradient(180deg, var(--moss), rgba(124, 139, 107, .12));
}

.page-about .about-bands__row i:nth-child(2),
.page-about .about-bands__row i:nth-child(7) {
  background: linear-gradient(180deg, var(--cyan), rgba(34, 211, 238, .12));
}

.page-about .about-bands__row i:nth-child(3),
.page-about .about-bands__row i:nth-child(8) {
  background: linear-gradient(180deg, var(--clay), rgba(194, 112, 63, .12));
}

.page-about .about-bands__row i:nth-child(4),
.page-about .about-bands__row i:nth-child(9) {
  background: linear-gradient(180deg, var(--violet), rgba(168, 85, 247, .12));
}

.page-about .about-bands__row i:nth-child(5) {
  background: linear-gradient(180deg, var(--magenta), rgba(255, 61, 190, .12));
}

.page-about .about-bands__row i:nth-child(6) {
  background: linear-gradient(180deg, var(--lime), rgba(182, 255, 59, .12));
}

.page-about .about-bands__legend {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(233, 227, 213, .7);
}

.page-about .about-bands__text p {
  margin: 0 0 16px;
}

.page-about .about-bands__text p:last-child {
  margin-bottom: 0;
}

/* ---------- 03 把关 ---------- */
.page-about .about-review {
  margin-top: clamp(26px, 4vw, 44px);
}

.page-about .about-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-step {
  position: relative;
  padding: 20px 22px 22px;
  border-radius: var(--r-md);
  background: #fff;
  box-shadow: 0 1px 0 rgba(14, 17, 22, .08), 0 18px 34px -30px rgba(14, 17, 22, .5);
  border-inline-start: 4px solid var(--violet);
}

.page-about .about-step:nth-child(2) {
  border-inline-start-color: var(--cyan);
}

.page-about .about-step:nth-child(3) {
  border-inline-start-color: var(--lime);
}

.page-about .about-step__num {
  display: block;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--clay);
}

.page-about .about-step__title {
  margin: 10px 0 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.01em;
}

.page-about .about-step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(14, 17, 22, .74);
}

.page-about .about-review__side {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  align-content: start;
}

.page-about .about-quote {
  margin: 0;
  padding: 24px 24px 22px;
  border-radius: var(--r-md);
  background: linear-gradient(140deg, rgba(168, 85, 247, .14), rgba(255, 61, 190, .08));
  border: 1px solid rgba(168, 85, 247, .3);
}

.page-about .about-quote__text {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(18px, 2.6vw, 22px);
  line-height: 1.55;
  color: var(--ink);
}

.page-about .about-quote__src {
  display: block;
  margin-top: 14px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--clay);
}

.page-about .about-cadence {
  display: grid;
  gap: 14px;
}

.page-about .about-cadence__row {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px 18px;
  border-radius: var(--r-sm);
  background: rgba(14, 17, 22, .05);
}

.page-about .about-cadence__lamp {
  width: 12px;
  height: 12px;
  margin-top: 5px;
  border-radius: 50%;
  background: var(--violet);
  box-shadow: 0 0 0 3px rgba(168, 85, 247, .18), 0 0 12px rgba(168, 85, 247, .8);
}

.page-about .about-cadence__lamp--lime {
  background: var(--lime);
  box-shadow: 0 0 0 3px rgba(182, 255, 59, .18), 0 0 12px rgba(182, 255, 59, .8);
}

.page-about .about-cadence__lamp--cyan {
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(34, 211, 238, .18), 0 0 12px rgba(34, 211, 238, .8);
}

.page-about .about-cadence__title {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 16px;
  letter-spacing: -0.01em;
}

.page-about .about-cadence__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.68;
  color: rgba(14, 17, 22, .7);
}

/* ---------- 04 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  gap: 10px;
  padding: 22px 24px 24px 26px;
  border-radius: var(--r-md);
  background: var(--slate);
  border: 1px solid var(--rule);
  overflow: hidden;
  transition: border-color 170ms var(--ease), box-shadow 170ms var(--ease);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  inset-block: 0;
  inset-inline-start: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--violet), var(--magenta));
}

.page-about .about-timeline__item:hover {
  border-color: rgba(168, 85, 247, .5);
  box-shadow: var(--glow-violet);
}

.page-about .about-timeline__year {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--lime);
}

.page-about .about-timeline__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--bone);
}

.page-about .about-timeline__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: rgba(233, 227, 213, .74);
}

.page-about .about-timeline__tail {
  margin: clamp(22px, 3vw, 32px) 0 0;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(233, 227, 213, .66);
}

/* ---------- 05 团队 ---------- */
.page-about .about-team {
  margin-top: clamp(26px, 4vw, 44px);
  align-items: start;
}

.page-about .about-team__roles {
  display: grid;
  gap: 14px;
}

.page-about .about-role {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 6px 16px;
  padding: 20px 20px 22px;
  border-radius: var(--r-md);
  background: #fff;
  border: 1px solid rgba(14, 17, 22, .08);
}

.page-about .about-role__num {
  grid-row: span 2;
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--clay);
}

.page-about .about-role__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.01em;
}

.page-about .about-role p {
  grid-column: 2;
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(14, 17, 22, .72);
}

.page-about .about-team__media {
  align-self: stretch;
}

.page-about .about-partners {
  margin-top: clamp(28px, 4.2vw, 48px);
  padding: clamp(24px, 3.6vw, 36px);
  border-radius: var(--r-lg);
  background: linear-gradient(150deg, rgba(124, 139, 107, .2), rgba(34, 211, 238, .09));
  border-inline-start: 4px solid var(--moss);
}

.page-about .about-partners__head {
  max-width: 58ch;
}

.page-about .about-partners__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(19px, 2.6vw, 24px);
  letter-spacing: -0.014em;
}

.page-about .about-partners__head p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(14, 17, 22, .74);
}

.page-about .about-partners__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

/* ---------- 06 收束 ---------- */
.page-about .about-cta {
  padding-bottom: clamp(64px, 9vw, 120px);
}

.page-about .about-cta__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  margin-top: clamp(24px, 3.6vw, 40px);
}

.page-about .about-cta__body p {
  margin: 0 0 18px;
}

.page-about .about-cta__body p:last-child {
  margin-bottom: 0;
}

.page-about .about-cta__panel {
  align-self: start;
  padding: 26px 24px 28px;
  border-radius: var(--r-lg);
  background: linear-gradient(155deg, rgba(168, 85, 247, .2), rgba(14, 17, 22, .2) 60%, rgba(34, 211, 238, .14));
  border: 1px solid rgba(168, 85, 247, .34);
}

.page-about .about-cta__panel-label {
  margin: 0 0 18px;
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--cyan);
}

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

.page-about .about-cta__help {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(233, 227, 213, .74);
}

.page-about .about-cta__help a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 211, 238, .4);
  transition: color 150ms var(--ease), border-color 150ms var(--ease);
}

.page-about .about-cta__help a:hover,
.page-about .about-cta__help a:focus-visible {
  color: var(--lime);
  border-bottom-color: rgba(182, 255, 59, .6);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .about-axes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .about-timeline__item {
    grid-template-columns: 116px minmax(0, 1fr);
    align-items: start;
    gap: 22px;
    padding: 26px 30px 28px 32px;
  }

  .page-about .about-timeline__year {
    font-size: 22px;
    padding-top: 2px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 4fr);
    align-items: center;
    gap: clamp(32px, 4.6vw, 64px);
  }

  .page-about .about-cta__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 4fr);
    align-items: start;
  }

  .page-about .about-origin__side {
    margin-top: 6px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-hero__title {
    max-width: 16ch;
  }

  .page-about .about-timeline__item {
    grid-template-columns: 148px minmax(0, 1fr);
  }
}

@media (max-width: 480px) {
  .page-about .about-bands__row {
    height: 54px;
    gap: 3px;
  }

  .page-about .about-role {
    grid-template-columns: 44px minmax(0, 1fr);
  }

  .page-about .about-role__num {
    font-size: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-axis,
  .page-about .about-timeline__item,
  .page-about .about-cta__help a {
    transition: none;
  }
}