.page-about {
  --about-pad: clamp(48px, 8vw, 104px);
  --about-line-dark: rgba(220, 233, 230, .16);
  background: var(--ink);
  color: var(--fog);
}

.page-about .about-crumbs {
  padding-top: clamp(14px, 2.4vw, 24px);
  padding-bottom: 10px;
  background: var(--ink);
}

.page-about .crumbs {
  color: var(--steel);
  font-size: 13px;
}

.page-about .crumbs a {
  color: var(--fog);
  text-decoration: none;
}

.page-about .crumbs a:hover,
.page-about .crumbs a:focus-visible {
  color: var(--mint);
}

.page-about .title-xl,
.page-about .title-lg,
.page-about .title-md {
  letter-spacing: -.035em;
  line-height: 1.14;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 28px 0 var(--about-pad);
  background: var(--ink);
  border-bottom: 1px solid var(--line-dark);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  right: -12%;
  top: -18%;
  width: 64%;
  height: 138%;
  background: linear-gradient(155deg, rgba(0, 194, 168, .22), rgba(0, 194, 168, 0) 62%);
  clip-path: polygon(38% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg, transparent 0 87px, var(--line-dark-soft) 87px 88px);
  opacity: .55;
  pointer-events: none;
}

.page-about .about-hero-ghost {
  position: absolute;
  right: -.04em;
  top: -.18em;
  font-family: var(--font-mono);
  font-size: clamp(120px, 30vw, 320px);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(0, 194, 168, .18);
  pointer-events: none;
  user-select: none;
  z-index: 0;
}

.page-about .about-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 34px;
  min-width: 0;
}

.page-about .about-hero .eyebrow {
  color: var(--mint);
  font-family: var(--font-mono);
  letter-spacing: .14em;
}

.page-about .about-hero h1 {
  margin: 14px 0 20px;
  color: var(--fog);
  overflow-wrap: break-word;
}

.page-about .about-hero h1 em {
  font-style: normal;
  color: var(--mint);
}

.page-about .about-hero .lead {
  max-width: 46ch;
  color: var(--fog);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
}

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

.page-about .about-hero-side {
  align-self: end;
  padding-top: 18px;
  border-top: 2px solid var(--mint);
}

.page-about .about-hero-kicker {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--steel);
}

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

.page-about .about-hero-list li {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-dark);
  font-size: 14px;
  line-height: 1.7;
  color: var(--steel);
}

.page-about .about-hero-num {
  font-size: clamp(24px, 4vw, 30px);
  font-weight: 700;
  color: var(--lime);
  letter-spacing: -.03em;
}

.page-about .about-hero-foot {
  margin: 16px 0 0;
  font-size: 13px;
  color: var(--steel);
}

/* ---------- 历程 ---------- */
.page-about .about-section {
  padding: var(--about-pad) 0;
}

.page-about .about-origin {
  background: var(--fog);
  color: var(--ink);
}

.page-about .about-origin .eyebrow {
  color: var(--mint-deep);
  font-family: var(--font-mono);
  letter-spacing: .14em;
}

.page-about .about-origin-grid {
  display: grid;
  gap: 24px;
}

.page-about .about-origin-mark {
  display: flex;
  align-items: center;
  gap: 14px;
}

.page-about .about-origin-year {
  font-size: clamp(40px, 10vw, 68px);
  font-weight: 700;
  letter-spacing: -.06em;
  color: var(--mint-deep);
  line-height: 1;
}

.page-about .about-origin-line {
  display: block;
  flex: 1;
  height: 1px;
  background: var(--line);
}

.page-about .about-origin-label {
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--slate);
}

.page-about .about-origin-body h2 {
  margin: 10px 0 18px;
}

.page-about .about-origin-body p {
  max-width: 60ch;
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--slate);
}

.page-about .about-origin-figure {
  margin-top: 28px;
}

.page-about .media {
  position: relative;
  overflow: hidden;
  background: var(--ink-2);
}

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

.page-about .media-caption {
  margin: 10px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--mint);
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--ink-2);
  color: var(--fog);
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}

.page-about .about-team .eyebrow,
.page-about .about-coverage .eyebrow {
  color: var(--mint);
  font-family: var(--font-mono);
  letter-spacing: .14em;
}

.page-about .about-head {
  display: grid;
  gap: 18px;
  margin-bottom: 32px;
}

.page-about .about-head h2 {
  margin: 10px 0 0;
}

.page-about .about-head-lead {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--steel);
  max-width: 48ch;
}

.page-about .about-team-grid {
  display: grid;
  gap: 32px;
  min-width: 0;
}

.page-about .about-roles {
  min-width: 0;
}

.page-about .about-role {
  border-top: 1px solid var(--line-dark);
}

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

.page-about .about-role summary {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr) 22px;
  gap: 10px;
  align-items: center;
  padding: 18px 4px;
  cursor: pointer;
  list-style: none;
  transition: color .18s var(--ease), background-color .18s var(--ease);
}

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

.page-about .about-role summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--mint);
  justify-self: end;
}

.page-about .about-role[open] summary::after {
  content: "\2212";
}

.page-about .about-role summary:hover,
.page-about .about-role summary:focus-visible {
  background: rgba(0, 194, 168, .08);
  outline: none;
}

.page-about .about-role[open] summary {
  color: var(--mint);
}

.page-about .about-role-index {
  font-size: 13px;
  color: var(--steel);
}

.page-about .about-role-name {
  font-size: clamp(18px, 2.4vw, 22px);
  font-weight: 700;
  letter-spacing: -.02em;
}

.page-about .about-role-meta {
  display: none;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--steel);
}

.page-about .about-role-body {
  padding: 0 4px 20px 48px;
}

.page-about .about-role-body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--steel);
}

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

.page-about .about-team-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--steel);
}

/* ---------- 流程 ---------- */
.page-about .about-process {
  background: var(--fog);
  color: var(--ink);
}

.page-about .about-process .eyebrow {
  color: var(--mint-deep);
  font-family: var(--font-mono);
  letter-spacing: .14em;
}

.page-about .about-process-grid {
  display: grid;
  gap: 30px;
  min-width: 0;
}

.page-about .about-process-intro h2 {
  margin: 10px 0 18px;
}

.page-about .about-process-intro > p {
  max-width: 46ch;
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate);
}

.page-about .about-process-note {
  font-size: 14px !important;
  color: var(--slate);
}

.page-about .about-mark {
  position: relative;
  display: inline-block;
  font-weight: 700;
  color: var(--mint-deep);
  border-bottom: 1px dashed currentColor;
  cursor: help;
  outline-offset: 3px;
}

.page-about .about-mark-tip {
  position: absolute;
  left: 0;
  bottom: calc(100% + 10px);
  width: min(280px, 72vw);
  padding: 10px 12px;
  background: var(--ink);
  color: var(--fog);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  line-height: 1.65;
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  transition: opacity .18s var(--ease), transform .18s var(--ease), visibility .18s var(--ease);
  z-index: 6;
}

.page-about .about-mark:hover .about-mark-tip,
.page-about .about-mark:focus .about-mark-tip,
.page-about .about-mark:focus-within .about-mark-tip {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.page-about .about-textlink {
  display: inline-block;
  margin-top: 6px;
  color: var(--mint-deep);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 2px solid var(--mint-deep);
  padding-bottom: 2px;
}

.page-about .about-textlink:hover,
.page-about .about-textlink:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  min-width: 0;
}

.page-about .about-flow li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 12px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

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

.page-about .about-flow-index {
  font-size: 13px;
  font-weight: 700;
  color: var(--mint-deep);
}

.page-about .about-flow h3 {
  margin: 0 0 6px;
  font-size: 18px;
  letter-spacing: -.02em;
}

.page-about .about-flow p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--slate);
}

/* ---------- 覆盖 ---------- */
.page-about .about-coverage {
  background: var(--ink);
  color: var(--fog);
}

.page-about .about-coverage-grid {
  display: grid;
  gap: 32px;
  min-width: 0;
}

.page-about .about-coverage-text h2 {
  margin: 10px 0 18px;
}

.page-about .about-coverage-text > p {
  max-width: 50ch;
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--steel);
}

.page-about .about-coverage-list {
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-coverage-list li {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-dark);
  font-size: 14px;
  line-height: 1.75;
  color: var(--steel);
}

.page-about .about-coverage-list strong {
  color: var(--fog);
  font-weight: 700;
}

.page-about .about-coverage-key {
  font-weight: 700;
  color: var(--lime);
}

.page-about .about-dots {
  position: relative;
  min-height: 240px;
  padding: 18px;
  border: 1px solid var(--line-dark);
  background-color: var(--ink-2);
  background-image: radial-gradient(rgba(0, 194, 168, .28) 1.4px, transparent 1.4px);
  background-size: 22px 22px;
  overflow: hidden;
}

.page-about .about-dots::before {
  content: "";
  position: absolute;
  inset: 18% 12% auto auto;
  width: 42%;
  height: 1px;
  background: var(--orange);
  transform: rotate(-28deg);
  transform-origin: right center;
}

.page-about .about-dots-caption {
  position: absolute;
  left: 18px;
  bottom: 16px;
  right: 18px;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--steel);
}

/* ---------- 方法 ---------- */
.page-about .about-method {
  background: var(--fog);
  color: var(--ink);
}

.page-about .about-method .eyebrow {
  color: var(--mint-deep);
  font-family: var(--font-mono);
  letter-spacing: .14em;
}

.page-about .about-method-grid {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-method-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-method-item h3 {
  margin: 0 0 8px;
  font-size: 19px;
  letter-spacing: -.02em;
}

.page-about .about-method-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--slate);
}

.page-about .about-method-item--lead h3 {
  font-size: clamp(22px, 3.4vw, 28px);
  color: var(--mint-deep);
}

.page-about .about-method-figure {
  margin-top: 30px;
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  background: var(--mint);
  color: var(--ink);
  padding: clamp(36px, 6vw, 64px) 0;
}

.page-about .about-cta-inner {
  display: grid;
  gap: 22px;
}

.page-about .about-cta h2 {
  margin: 0 0 10px;
}

.page-about .about-cta p {
  margin: 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-2);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-self: center;
}

@media (min-width: 640px) {
  .page-about .about-role-meta {
    display: inline;
    justify-self: end;
  }

  .page-about .about-role summary {
    grid-template-columns: 38px minmax(0, 1fr) auto 22px;
  }

  .page-about .about-head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: end;
    gap: 32px;
  }

  .page-about .about-method-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 36px;
  }

  .page-about .about-method-item--lead {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: end;
  }

  .page-about .about-hero {
    padding-top: 44px;
  }

  .page-about .about-origin-grid {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-origin-mark {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    position: sticky;
    top: calc(var(--header-offset) + 24px);
  }

  .page-about .about-origin-line {
    width: 1px;
    height: 120px;
    flex: none;
    background: var(--line);
  }

  .page-about .about-origin-label {
    writing-mode: vertical-rl;
    letter-spacing: .3em;
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-team-figure {
    position: sticky;
    top: calc(var(--header-offset) + 24px);
  }

  .page-about .about-process-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-coverage-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: stretch;
  }

  .page-about .about-dots {
    min-height: 100%;
  }

  .page-about .about-cta-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 1200px) {
  .page-about .about-method-grid {
    column-gap: 56px;
  }

  .page-about .about-method-item {
    padding: 26px 0;
  }
}

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