.page-about {
  --ab-pad: clamp(52px, 7vw, 92px);
  --ab-gap: clamp(18px, 2.6vw, 30px);
  margin: 0;
  background: var(--c-ink);
  color: var(--c-cold);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

.page-about .about-hero__crumb,
.page-about .about-hero__title,
.page-about .about-band__title,
.page-about .about-journey__sub,
.page-about .about-partners__sub,
.page-about .about-next__title {
  font-family: var(--font-display);
  letter-spacing: -0.01em;
}

/* ---------- 封面 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(20px, 3.4vw, 36px) 0;
  background:
    radial-gradient(120% 82% at 84% 0%, rgba(201, 162, 39, 0.18), transparent 62%),
    radial-gradient(90% 70% at 6% 96%, rgba(127, 227, 208, 0.08), transparent 60%),
    linear-gradient(178deg, #0B2B26 0%, #0B2B26 44%, #12160F 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    102deg,
    rgba(232, 244, 241, 0.035) 0 1px,
    transparent 1px 17px
  );
  opacity: 0.7;
}

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

.page-about .about-hero__crumb {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--c-dim);
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-about .about-hero__crumb a {
  color: var(--c-neon);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-hero__crumb a:hover,
.page-about .about-hero__crumb a:focus-visible {
  border-bottom-color: var(--c-neon);
}

.page-about .about-hero .kicker {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-neon);
  border-left: 3px solid var(--c-gold);
  padding-left: 10px;
  margin: 0 0 14px;
}

.page-about .about-hero__title {
  font-size: clamp(34px, 8vw, 62px);
  line-height: 1.06;
  font-weight: 800;
  margin: 0 0 clamp(16px, 2.4vw, 26px);
  color: var(--c-cold);
  max-width: 15em;
}

.page-about .about-hero__lede {
  font-size: clamp(16px, 2.4vw, 19px);
  line-height: 1.8;
  color: var(--c-dim);
  margin: 0 0 clamp(20px, 3vw, 30px);
  max-width: 40em;
}

.page-about .about-hero__chips {
  list-style: none;
  margin: 0 0 clamp(26px, 4vw, 44px);
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-hero__chips li {
  font-size: 13px;
  letter-spacing: 0.04em;
  padding: 7px 14px;
  border: 2px solid var(--c-hair);
  border-radius: var(--r-pill);
  color: var(--c-cold);
  background: rgba(18, 22, 15, 0.5);
  white-space: nowrap;
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  padding-inline: max(20px, calc((100vw - var(--w-page)) / 2));
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: clamp(180px, 34vw, 340px);
  object-fit: cover;
  border: 3px solid var(--c-gold);
  border-bottom: none;
  filter: saturate(0.86) contrast(1.06);
}

.page-about .about-hero__figure figcaption {
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--c-dim);
  padding: 10px 0 0;
  border-top: 1px solid var(--c-hair);
  margin-top: -1px;
}

/* ---------- 章节色带 ---------- */
.page-about .about-band {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 16px;
  align-items: baseline;
  border-top: 3px solid var(--c-gold);
  padding-top: 16px;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .about-band__num {
  font-family: var(--font-num);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--c-gold);
  grid-row: 1 / span 2;
  padding-top: 5px;
}

.page-about .about-band__title {
  font-size: clamp(24px, 4.6vw, 38px);
  line-height: 1.16;
  font-weight: 800;
  margin: 0;
  color: var(--c-cold);
}

.page-about .about-band__note {
  margin: 0;
  font-size: 15px;
  color: var(--c-dim);
  grid-column: 2;
}

.page-about .about-band--ink .about-band__title {
  color: var(--c-teal);
}

.page-about .about-band--ink .about-band__note {
  color: var(--c-stone);
}

.page-about .about-band--ink {
  border-top-color: var(--c-teal);
}

.page-about .about-band--ink .about-band__num {
  color: var(--c-brick);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding-block: var(--ab-pad);
  background: linear-gradient(180deg, #12160F 0%, #12160F 78%, #0B2B26 100%);
}

.page-about .about-team__split {
  display: grid;
  gap: var(--ab-gap);
  margin-bottom: clamp(28px, 4.4vw, 48px);
}

.page-about .about-team__text p {
  margin: 0 0 16px;
  color: var(--c-dim);
}

.page-about .about-shift {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
  border-left: 3px solid var(--c-gold);
}

.page-about .about-shift li {
  display: grid;
  gap: 2px 14px;
  padding: 12px 14px;
  background: rgba(11, 43, 38, 0.5);
}

.page-about .about-shift__role {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 16px;
  color: var(--c-cold);
}

.page-about .about-shift__desc {
  font-size: 14px;
  line-height: 1.6;
  color: var(--c-dim);
}

.page-about .about-team__figure {
  margin: 0;
  border: 3px solid var(--c-gold);
  box-shadow: var(--shadow-hard);
  background: var(--c-ink);
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-about .about-team__figure figcaption {
  font-size: 13px;
  color: var(--c-dim);
  padding: 10px 14px;
  border-top: 1px solid var(--c-hair);
}

.page-about .about-roles {
  border-top: 1px solid var(--c-hair);
  padding-top: clamp(20px, 3vw, 30px);
  display: grid;
  gap: 18px;
}

.page-about .about-roles__grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 6px;
  max-width: 560px;
}

.page-about .about-roles__cell {
  display: block;
  aspect-ratio: 1 / 1;
  border-radius: 1px;
}

.page-about .about-roles__cell--edit { background: var(--c-gold); }
.page-about .about-roles__cell--watch { background: var(--c-neon); }
.page-about .about-roles__cell--dev { background: var(--c-cold); }
.page-about .about-roles__cell--ops { background: var(--c-terra); }
.page-about .about-roles__cell--help { background: var(--c-stone); }
.page-about .about-roles__cell--design { background: var(--c-brick); }

.page-about .about-roles__legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 8px 18px;
  font-size: 13px;
  letter-spacing: 0.03em;
  color: var(--c-dim);
}

.page-about .about-roles__legend li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-about .about-roles__key {
  width: 12px;
  height: 12px;
  flex: 0 0 12px;
  display: inline-block;
  border-radius: 1px;
}

.page-about .about-roles__key--edit { background: var(--c-gold); }
.page-about .about-roles__key--watch { background: var(--c-neon); }
.page-about .about-roles__key--dev { background: var(--c-cold); }
.page-about .about-roles__key--ops { background: var(--c-terra); }
.page-about .about-roles__key--help { background: var(--c-stone); }
.page-about .about-roles__key--design { background: var(--c-brick); }

/* ---------- 四步流程 ---------- */
.page-about .about-flow-section {
  padding-block: var(--ab-pad);
  background: var(--c-paper);
  color: var(--c-ink);
}

.page-about .about-flow {
  border: 3px solid var(--c-ink);
  box-shadow: 10px 10px 0 rgba(11, 43, 38, 0.22);
  background: #FBF9F2;
}

.page-about .about-flow__rail {
  display: flex;
  overflow-x: auto;
  border-bottom: 3px solid var(--c-ink);
  scrollbar-width: thin;
}

.page-about .about-flow__tab {
  flex: 1 0 auto;
  min-width: 148px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 18px;
  border: none;
  border-right: 1px solid rgba(18, 22, 15, 0.16);
  background: transparent;
  color: var(--c-ink);
  font-family: var(--font-body);
  font-size: 15px;
  text-align: left;
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-flow__tab:last-child {
  border-right: none;
}

.page-about .about-flow__tab:hover {
  background: rgba(201, 162, 39, 0.16);
}

.page-about .about-flow__tab[aria-selected="true"] {
  background: var(--c-teal);
  color: var(--c-cold);
}

.page-about .about-flow__tab:focus-visible {
  outline: 3px solid var(--c-brick);
  outline-offset: -3px;
}

.page-about .about-flow__idx {
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--c-brick);
}

.page-about .about-flow__tab[aria-selected="true"] .about-flow__idx {
  color: var(--c-neon);
}

.page-about .about-flow__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 16px;
  letter-spacing: 0.01em;
}

.page-about .about-flow__panel {
  padding: clamp(22px, 3.6vw, 38px);
}

.page-about .about-flow__panel p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: #23302A;
}

.page-about .about-flow__lead {
  font-family: var(--font-display);
  font-size: clamp(19px, 3vw, 24px) !important;
  font-weight: 800;
  line-height: 1.4 !important;
  color: var(--c-teal) !important;
  margin-bottom: 12px !important;
  padding-left: 14px;
  border-left: 4px solid var(--c-gold);
}

/* ---------- 规模 ---------- */
.page-about .about-scale {
  padding-block: var(--ab-pad);
  background:
    radial-gradient(80% 60% at 100% 0%, rgba(201, 162, 39, 0.14), transparent 62%),
    linear-gradient(180deg, #0B2B26 0%, #12160F 100%);
}

.page-about .about-scale__grid {
  display: grid;
  gap: var(--ab-gap);
  margin-bottom: clamp(24px, 3.6vw, 38px);
}

.page-about .about-scale__cell {
  border: 2px solid var(--c-hair);
  background: rgba(18, 22, 15, 0.62);
  padding: clamp(20px, 3vw, 28px);
  display: grid;
  gap: 6px;
  align-content: start;
}

.page-about .about-scale__num {
  font-family: var(--font-num);
  font-size: clamp(46px, 9vw, 72px);
  font-weight: 700;
  line-height: 0.94;
  color: var(--c-cold);
  letter-spacing: -0.02em;
}

.page-about .about-scale__plus,
.page-about .about-scale__unit {
  font-size: 0.48em;
  color: var(--c-gold);
  margin-left: 4px;
}

.page-about .about-scale__lb {
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-neon);
}

.page-about .about-scale__cell p {
  margin: 6px 0 0;
  font-size: 15px;
  color: var(--c-dim);
}

.page-about .about-scale__foot {
  margin: 0;
  border-top: 1px solid var(--c-hair);
  padding-top: 18px;
  font-size: 15px;
  color: var(--c-dim);
  max-width: 46em;
}

/* ---------- 标签 ---------- */
.page-about .about-tags-section {
  padding-block: var(--ab-pad);
  background: var(--c-paper);
  color: var(--c-ink);
}

.page-about .about-tags__lede {
  margin: 0 0 clamp(20px, 3vw, 30px);
  font-size: 16px;
  line-height: 1.8;
  color: #2C3A32;
  max-width: 44em;
}

.page-about .about-tags__groups {
  display: grid;
  gap: 2px;
  border-left: 3px solid var(--c-brick);
}

.page-about .about-tags__group {
  background: #FBF9F2;
  border: 1px solid rgba(18, 22, 15, 0.14);
  border-left: none;
  padding: 0 16px;
}

.page-about .about-tags__group[open] {
  background: #FFFFFF;
}

.page-about .about-tags__group summary {
  cursor: pointer;
  display: grid;
  gap: 2px 14px;
  padding: 15px 0;
  list-style: none;
}

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

.page-about .about-tags__group summary:focus-visible {
  outline: 3px solid var(--c-brick);
  outline-offset: 2px;
}

.page-about .about-tags__key {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--c-teal);
}

.page-about .about-tags__key::before {
  content: "+ ";
  color: var(--c-brick);
  font-family: var(--font-num);
}

.page-about .about-tags__group[open] .about-tags__key::before {
  content: "− ";
}

.page-about .about-tags__sum {
  font-size: 14px;
  color: var(--c-stone);
}

.page-about .about-tags__group p {
  margin: 0;
  padding: 0 0 16px;
  font-size: 15px;
  line-height: 1.75;
  color: #2C3A32;
  max-width: 40em;
}

.page-about .about-tags__note {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 16px 18px;
  border: 2px dashed rgba(11, 43, 38, 0.32);
  font-size: 15px;
  line-height: 1.75;
  color: #2C3A32;
  max-width: 46em;
}

/* ---------- 历程 ---------- */
.page-about .about-journey {
  position: relative;
  padding-block: var(--ab-pad);
  background: linear-gradient(180deg, #12160F 0%, #0B2B26 100%);
  overflow: hidden;
}

.page-about .about-journey__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.18;
  pointer-events: none;
}

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

.page-about .about-journey__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 clamp(18px, 3vw, 30px);
  border-left: 2px solid var(--c-hair);
  display: grid;
  gap: clamp(26px, 4vw, 42px);
  counter-reset: none;
}

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

.page-about .about-journey__item::before {
  content: "";
  position: absolute;
  left: calc(-1 * clamp(18px, 3vw, 30px) - 7px);
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--c-gold);
  box-shadow: 0 0 0 4px #0B2B26;
}

.page-about .about-journey__stage {
  display: block;
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--c-neon);
  margin-bottom: 6px;
}

.page-about .about-journey__sub {
  font-size: clamp(19px, 3vw, 25px);
  font-weight: 800;
  line-height: 1.3;
  margin: 0 0 8px;
  color: var(--c-cold);
}

.page-about .about-journey__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-dim);
  max-width: 42em;
}

/* ---------- 协作 ---------- */
.page-about .about-partners {
  padding-block: var(--ab-pad);
  background: linear-gradient(180deg, #0B2B26 0%, #12160F 100%);
  border-top: 3px solid var(--c-gold);
}

.page-about .about-partners__split {
  display: grid;
  gap: var(--ab-gap);
}

.page-about .about-partners__card {
  border: 2px solid var(--c-hair);
  background: rgba(18, 22, 15, 0.66);
  padding: clamp(20px, 3vw, 28px);
  display: grid;
  gap: 8px;
  align-content: start;
}

.page-about .about-partners__card--wide {
  border-color: rgba(127, 227, 208, 0.36);
}

.page-about .about-partners__num {
  font-family: var(--font-num);
  font-size: clamp(34px, 6vw, 48px);
  font-weight: 700;
  line-height: 1;
  color: var(--c-gold);
}

.page-about .about-partners__sub {
  font-size: 18px;
  font-weight: 800;
  margin: 0;
  color: var(--c-cold);
}

.page-about .about-partners__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--c-dim);
}

.page-about .about-partners__foot {
  margin: clamp(24px, 3.6vw, 36px) 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--c-hair);
  font-size: 15px;
  color: var(--c-neon);
  letter-spacing: 0.02em;
}

/* ---------- 结尾 ---------- */
.page-about .about-next {
  padding-block: clamp(52px, 7vw, 88px);
  background: var(--c-brick);
  color: var(--c-cold);
}

.page-about .about-next__title {
  font-size: clamp(24px, 4.6vw, 36px);
  font-weight: 800;
  line-height: 1.2;
  margin: 0 0 14px;
  color: #FFF6EC;
}

.page-about .about-next__lede {
  margin: 0 0 clamp(22px, 3vw, 32px);
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255, 246, 236, 0.86);
  max-width: 42em;
}

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

.page-about .about-next__btn {
  border: 2px solid #FFF6EC;
  border-radius: var(--r-pill);
  padding: 11px 22px;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  color: #FFF6EC;
  background: transparent;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-next__btn:hover,
.page-about .about-next__btn:focus-visible {
  background: #FFF6EC;
  color: var(--c-brick);
}

.page-about .about-next__btn:focus-visible {
  outline: 3px solid var(--c-cold);
  outline-offset: 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-scale__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .about-partners__card--wide {
    grid-column: 1 / -1;
  }

  .page-about .about-roles__grid {
    grid-template-columns: repeat(9, minmax(0, 1fr));
  }

  .page-about .about-shift li {
    grid-template-columns: minmax(120px, 160px) 1fr;
    align-items: baseline;
  }
}

@media (min-width: 1024px) {
  .page-about .about-team__split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-about .about-roles {
    grid-template-columns: auto 1fr;
    align-items: center;
    gap: 30px;
  }

  .page-about .about-journey__list {
    padding-left: 44px;
  }

  .page-about .about-journey__item::before {
    left: -51px;
  }

  .page-about .about-hero__figure img {
    height: clamp(320px, 38vw, 480px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-flow__tab,
  .page-about .about-next__btn,
  .page-about .about-hero__crumb a {
    transition: none;
  }
}