.page-about {
  --about-rule: rgba(36, 66, 88, 0.16);
  --about-rule-strong: rgba(36, 66, 88, 0.85);
  --about-ink-soft: rgba(246, 243, 234, 0.7);
  background: var(--mist);
  color: var(--char);
  font-family: var(--font-body);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  background: var(--paper);
  border-bottom: 1px solid var(--about-rule);
  padding: 0.9rem 0;
}

.page-about .about-crumb .breadcrumb {
  margin: 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background-color: var(--ink);
  background-image:
    linear-gradient(rgba(46, 140, 135, 0.13) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 140, 135, 0.13) 1px, transparent 1px),
    radial-gradient(115% 85% at 84% 6%, rgba(182, 128, 63, 0.3), transparent 62%);
  background-size: 48px 48px, 48px 48px, 100% 100%;
  color: var(--paper);
  padding: clamp(2.2rem, 6vw, 4.4rem) 0 clamp(2.6rem, 7vw, 5rem);
  border-bottom: 3px solid var(--copper);
}

.page-about .about-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
}

.page-about .about-hero__kicker {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--copper-bright);
}

.page-about .about-hero__kicker::before {
  content: "";
  width: 34px;
  height: 1px;
  background: currentColor;
  flex: none;
}

.page-about .about-hero h1 {
  margin: 0 0 1.1rem;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.95rem, 7.4vw, 3.5rem);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero__lead {
  margin: 0 0 1.6rem;
  max-width: 34em;
  font-size: clamp(0.98rem, 2.6vw, 1.1rem);
  line-height: 1.85;
  color: rgba(246, 243, 234, 0.82);
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  margin: 0 0 1.8rem;
  padding: 0;
  border-top: 1px solid var(--about-rule-strong);
}

.page-about .about-hero__facts li {
  flex: 1 1 8rem;
  padding: 0.9rem 1rem 0.9rem 0;
  border-right: 1px solid var(--about-rule-strong);
}

.page-about .about-hero__facts li:last-child {
  border-right: 0;
}

.page-about .about-hero__facts .num {
  display: block;
  margin-bottom: 0.3rem;
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 4.4vw, 1.9rem);
  line-height: 1.1;
  color: var(--copper-bright);
}

.page-about .about-hero__facts li > span:last-child {
  font-family: var(--font-head);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: rgba(246, 243, 234, 0.62);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

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

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid rgba(217, 164, 91, 0.45);
  object-fit: cover;
}

.page-about .about-hero__figure figcaption {
  margin-top: 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: rgba(246, 243, 234, 0.5);
}

/* ---------- 通用标签与标题 ---------- */
.page-about .about-label {
  display: block;
  margin: 0 0 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--cinnabar);
}

.page-about .about-label--light {
  color: var(--copper-bright);
}

/* ---------- 起点 ---------- */
.page-about .about-origin {
  background: var(--paper);
  border-bottom: 1px solid var(--about-rule);
  padding: clamp(2.4rem, 6vw, 4.2rem) 0;
}

.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
}

.page-about .about-origin h2 {
  margin: 0;
  padding-left: 1rem;
  border-left: 3px solid var(--copper);
  font-family: var(--font-head);
  font-size: clamp(1.45rem, 4.4vw, 2.1rem);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-origin__body p {
  margin: 0 0 1rem;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--char);
}

.page-about .about-origin__list {
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-origin__list li {
  display: grid;
  grid-template-columns: 4.2rem minmax(0, 1fr);
  gap: 0.9rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--about-rule);
  font-size: 0.94rem;
  line-height: 1.7;
}

.page-about .about-origin__list .mono {
  align-self: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--copper);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  background-color: var(--mist);
  background-image: linear-gradient(90deg, rgba(36, 66, 88, 0.07) 1px, transparent 1px);
  background-size: 25% 100%;
  padding: clamp(2.6rem, 6.5vw, 4.6rem) 0;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-timeline__head h2 {
  margin: 0 0 0.7rem;
  font-family: var(--font-head);
  font-size: clamp(1.45rem, 4.4vw, 2.1rem);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-timeline__intro {
  margin: 0;
  max-width: 44em;
  font-size: 0.96rem;
  line-height: 1.8;
  color: rgba(17, 28, 36, 0.72);
}

.page-about .about-tl {
  list-style: none;
  margin: 1.8rem 0 0;
  padding: 0;
}

.page-about .about-tl__item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.55rem;
  padding: 1.35rem 0 1.45rem 1.5rem;
  border-top: 1px solid rgba(36, 66, 88, 0.22);
}

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: 0.29rem;
  top: 0;
  bottom: 0;
  width: 1px;
  background: rgba(36, 66, 88, 0.26);
}

.page-about .about-tl__item::after {
  content: "";
  position: absolute;
  left: 0;
  top: 1.6rem;
  width: 0.6rem;
  height: 0.6rem;
  background: var(--copper);
  transform: rotate(45deg);
}

.page-about .about-tl__marker {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.7rem;
}

.page-about .about-tl__year {
  font-family: var(--font-mono);
  font-size: clamp(1.1rem, 3.4vw, 1.45rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-about .about-tl__code {
  padding: 0.15rem 0.4rem;
  border: 1px solid rgba(178, 58, 46, 0.35);
  font-family: var(--font-mono);
  font-size: 0.63rem;
  letter-spacing: 0.14em;
  color: var(--cinnabar);
}

.page-about .about-tl__panel h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-head);
  font-size: clamp(1.02rem, 3vw, 1.22rem);
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-tl__panel p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--char);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background-color: var(--ink);
  background-image:
    linear-gradient(rgba(46, 140, 135, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 140, 135, 0.09) 1px, transparent 1px);
  background-size: 56px 56px;
  color: var(--paper);
  padding: clamp(2.6rem, 6.5vw, 4.8rem) 0;
  border-top: 3px solid var(--copper);
  border-bottom: 1px solid rgba(182, 128, 63, 0.35);
}

.page-about .about-team h2 {
  margin: 0 0 0.8rem;
  font-family: var(--font-head);
  font-size: clamp(1.5rem, 4.6vw, 2.25rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-team__intro {
  margin: 0 0 1.9rem;
  max-width: 46em;
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--about-ink-soft);
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: 1px solid var(--about-rule-strong);
}

.page-about .about-team__card {
  position: relative;
  padding: 1.5rem 1.1rem 1.6rem;
  border-bottom: 1px solid var(--about-rule-strong);
  outline: none;
  transition: background-color 0.3s var(--ease);
}

.page-about .about-team__card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 0;
  height: 2px;
  background: var(--copper-bright);
  transition: width 0.35s var(--ease);
}

.page-about .about-team__card:hover,
.page-about .about-team__card:focus-visible {
  background: rgba(182, 128, 63, 0.09);
}

.page-about .about-team__card:hover::before,
.page-about .about-team__card:focus-visible::before {
  width: 100%;
}

.page-about .about-team__icon {
  display: block;
  margin-bottom: 0.85rem;
  color: var(--copper-bright);
}

.page-about .about-team__card h3 {
  margin: 0 0 0.6rem;
  font-family: var(--font-head);
  font-size: 1.08rem;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-about .about-team__card p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.8;
  color: rgba(246, 243, 234, 0.76);
}

.page-about .about-team__card .about-team__duty {
  margin-top: 0.7rem;
  padding-top: 0.7rem;
  border-top: 1px dashed rgba(182, 128, 63, 0.35);
  font-family: var(--font-head);
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--copper-bright);
}

.page-about .about-team__figure {
  margin: 1.8rem 0 0;
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid rgba(182, 128, 63, 0.4);
  object-fit: cover;
}

.page-about .about-team__note {
  margin: 1.2rem 0 0;
  padding-left: 0.9rem;
  border-left: 2px solid var(--cinnabar);
  font-family: var(--font-head);
  font-size: 0.82rem;
  line-height: 1.75;
  color: rgba(246, 243, 234, 0.68);
}

/* ---------- 覆盖与节奏 ---------- */
.page-about .about-reach {
  background: var(--paper);
  padding: clamp(2.6rem, 6.5vw, 4.6rem) 0;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-reach__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
}

.page-about .about-reach h2 {
  margin: 0 0 0.8rem;
  font-family: var(--font-head);
  font-size: clamp(1.45rem, 4.4vw, 2.1rem);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-reach__lead {
  margin: 0 0 1.5rem;
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--char);
}

.page-about .about-reach__dl {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-reach__dl > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-reach__dl dt {
  font-family: var(--font-head);
  font-size: 0.83rem;
  letter-spacing: 0.02em;
  color: rgba(17, 28, 36, 0.66);
}

.page-about .about-reach__dl dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  text-align: right;
  color: var(--ink);
}

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

.page-about .about-reach__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--about-rule);
  object-fit: cover;
}

.page-about .about-reach__figure figcaption {
  margin-top: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: rgba(178, 58, 46, 0.85);
}

/* ---------- 方法 ---------- */
.page-about .about-craft {
  background-color: var(--paper);
  background-image:
    repeating-linear-gradient(0deg, rgba(182, 128, 63, 0.045) 0 1px, transparent 1px 6px),
    radial-gradient(80% 60% at 12% 0%, rgba(182, 128, 63, 0.16), transparent 62%);
  padding: clamp(2.8rem, 7vw, 5rem) 0 clamp(2.8rem, 7vw, 4.6rem);
}

.page-about .about-craft h2 {
  margin: 0 0 0.7rem;
  font-family: var(--font-head);
  font-size: clamp(1.45rem, 4.4vw, 2.1rem);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-craft__intro {
  margin: 0;
  max-width: 42em;
  font-size: 0.96rem;
  line-height: 1.8;
  color: rgba(17, 28, 36, 0.72);
}

.page-about .about-craft__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: 1.7rem;
  border: 1px solid var(--about-rule);
  background: var(--about-rule);
}

.page-about .about-craft__cell {
  padding: 1.35rem 1.2rem 1.45rem;
  background: var(--paper);
}

.page-about .about-craft__cell .idx {
  display: block;
  margin-bottom: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: var(--cinnabar);
}

.page-about .about-craft__cell h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-head);
  font-size: 1.02rem;
  line-height: 1.45;
  color: var(--ink);
}

.page-about .about-craft__cell p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--char);
}

.page-about .about-next {
  margin-top: 2.2rem;
  padding-top: 1.5rem;
  border-top: 2px solid var(--ink);
}

.page-about .about-next__lead {
  margin: 0 0 0.9rem;
  font-family: var(--font-head);
  font-size: 0.86rem;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.page-about .about-next__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-next__list li {
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-next__list a {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 0.94rem;
  line-height: 1.6;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .about-next__list a:hover,
.page-about .about-next__list a:focus-visible {
  color: var(--copper);
  border-bottom-color: var(--copper);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-team__card {
    border-bottom: 0;
    border-right: 1px solid var(--about-rule-strong);
    padding: 1.7rem 1.3rem 1.8rem;
  }

  .page-about .about-team__card:last-child {
    border-right: 0;
  }

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

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

@media (min-width: 860px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: clamp(2rem, 5vw, 4rem);
    align-items: start;
  }

  .page-about .about-hero__figure {
    margin-top: 1.2rem;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
    gap: clamp(1.8rem, 5vw, 3.4rem);
  }

  .page-about .about-reach__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(2rem, 5vw, 3.6rem);
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-about .about-tl__item {
    grid-template-columns: 10.5rem minmax(0, 1fr);
    column-gap: 2rem;
    padding: 1.7rem 0 1.75rem 1.6rem;
    align-items: start;
  }

  .page-about .about-tl__item::after {
    top: 2.1rem;
  }

  .page-about .about-tl__marker {
    flex-direction: column;
    gap: 0.45rem;
    align-items: flex-start;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl__item,
  .page-about .about-team__card,
  .page-about .about-team__card::before,
  .page-about .about-next__list a {
    transition: none;
  }
}