.page-about {
  --about-rule: rgba(44, 60, 110, 0.55);
  --about-soft: rgba(148, 163, 200, 0.16);
  --about-panel: linear-gradient(180deg, rgba(22, 36, 79, 0.62), rgba(11, 20, 48, 0.42));
  padding-bottom: clamp(2rem, 6vw, 4rem);
}

/* 面包屑 */
.page-about .about-crumbs {
  padding-top: clamp(1.15rem, 3vw, 2rem);
}
.page-about .about-crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.15rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-num);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
}
.page-about .about-crumbs li {
  display: inline-flex;
  align-items: center;
  color: var(--mist);
}
.page-about .about-crumbs li + li::before {
  content: "/";
  margin: 0 0.55rem;
  color: var(--line-cold);
}
.page-about .about-crumbs a {
  color: var(--mist);
  text-decoration: none;
  transition: color 0.25s var(--ease);
}
.page-about .about-crumbs a:hover,
.page-about .about-crumbs a:focus-visible {
  color: var(--neon);
}
.page-about .about-crumbs [aria-current="page"] {
  color: var(--cold-white);
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  padding: clamp(1.5rem, 5vw, 3.5rem) 0 clamp(2.5rem, 7vw, 5rem);
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -12% -20% auto -12%;
  height: 460px;
  background:
    radial-gradient(58% 58% at 18% 30%, rgba(53, 224, 200, 0.13), transparent 70%),
    radial-gradient(50% 54% at 84% 6%, rgba(182, 255, 59, 0.11), transparent 72%);
  pointer-events: none;
}
.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2rem, 6vw, 3.5rem);
}
.page-about .about-hero__plate {
  display: inline-block;
  margin: 0;
}
.page-about .about-hero__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(2.35rem, 6.4vw, 4.6rem);
  line-height: 1.05;
  letter-spacing: -0.018em;
  color: var(--cold-white);
  margin: 1rem 0 1.15rem;
  text-wrap: balance;
}
.page-about .about-hero__title em {
  display: block;
  font-style: normal;
  color: var(--neon);
}
.page-about .about-hero__lede {
  max-width: 54ch;
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--mist);
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.9rem;
}
.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.35rem 1.25rem;
  margin: 0;
  padding: 1.5rem 0 0;
  border-top: 1px solid var(--about-rule);
}
.page-about .about-stat {
  min-width: 0;
}
.page-about .about-stat__label {
  margin: 0;
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  color: var(--mist);
}
.page-about .about-stat__value {
  margin: 0.3rem 0 0;
  font-family: var(--font-num);
  font-size: clamp(1.55rem, 3.6vw, 2.2rem);
  font-weight: 700;
  line-height: 1.05;
  color: var(--cold-white);
  font-variant-numeric: tabular-nums;
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
}
.page-about .about-stat__unit {
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--mist);
}
.page-about .about-stat:first-child .about-stat__value .num {
  color: var(--amber);
}

/* 版本演进 */
.page-about .about-axis-section {
  position: relative;
  margin-top: clamp(1.5rem, 5vw, 3rem);
  padding: clamp(3rem, 8vw, 6rem) 0 clamp(3rem, 7vw, 5.5rem);
  overflow: hidden;
}
.page-about .about-axis-section__veil {
  position: absolute;
  inset: 0;
  opacity: 0.2;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, transparent, #000 16%, #000 84%, transparent);
  mask-image: linear-gradient(180deg, transparent, #000 16%, #000 84%, transparent);
}
.page-about .about-axis-section__veil img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-about .about-axis-section__inner {
  position: relative;
}
.page-about .about-axis-section__intro {
  max-width: 62ch;
  margin: 0.9rem 0 0;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-axis {
  --axis-offset: -1.45rem;
  position: relative;
  margin: clamp(2rem, 5vw, 3.5rem) 0 0;
  padding: 0 0 0 1.6rem;
  list-style: none;
  display: grid;
  gap: clamp(2.25rem, 5.5vw, 4rem);
}
.page-about .about-axis::before {
  content: "";
  position: absolute;
  left: 0.45rem;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 1px;
  background: linear-gradient(180deg, var(--neon) 0%, rgba(53, 224, 200, 0.55) 48%, rgba(44, 60, 110, 0.35) 100%);
}
.page-about .about-node {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.9rem;
}
.page-about .about-node__dot {
  position: absolute;
  top: 0.6rem;
  left: var(--axis-offset);
  width: 0.62rem;
  height: 0.62rem;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 0 4px rgba(182, 255, 59, 0.14), 0 0 18px rgba(182, 255, 59, 0.45);
}
.page-about .about-node__marker {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  font-family: var(--font-num);
}
.page-about .about-node__idx {
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: rgba(148, 163, 200, 0.52);
  font-variant-numeric: tabular-nums;
}
.page-about .about-node__year {
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: var(--mist);
}
.page-about .about-node__body {
  border: 1px solid var(--about-rule);
  border-radius: var(--radius-lg);
  background: var(--about-panel);
  padding: clamp(1.25rem, 3.2vw, 2rem);
  transition: transform 0.4s var(--ease), border-color 0.35s var(--ease);
}
.page-about .about-node__body:hover,
.page-about .about-node__body:focus-within {
  transform: translateY(-3px);
  border-color: rgba(182, 255, 59, 0.42);
}
.page-about .about-node__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(1.3rem, 2.9vw, 1.7rem);
  font-weight: 700;
  letter-spacing: -0.008em;
  color: var(--cold-white);
}
.page-about .about-node__body p {
  margin: 0.7rem 0 0;
  font-size: 0.98rem;
  line-height: 1.82;
  color: var(--mist);
}
.page-about .about-node__list {
  margin: 1.15rem 0 0;
  padding: 1rem 0 0;
  border-top: 1px solid var(--about-soft);
  list-style: none;
  display: grid;
  gap: 0.5rem;
}
.page-about .about-node__list li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--mist);
  transition: transform 0.35s var(--ease), color 0.35s var(--ease);
}
.page-about .about-node__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 0.52rem;
  height: 1px;
  background: var(--neon);
}
.page-about .about-node__body:hover .about-node__list li,
.page-about .about-node__body:focus-within .about-node__list li {
  transform: translateY(-2px);
  color: var(--cold-white);
}
.page-about .about-node__body:hover .about-node__list li:nth-child(2) { transition-delay: 0.06s; }
.page-about .about-node__body:hover .about-node__list li:nth-child(3) { transition-delay: 0.12s; }

/* 数据来源 */
.page-about .about-source {
  padding: clamp(3rem, 8vw, 6rem) 0;
}
.page-about .about-source__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 3.25rem);
}
.page-about .about-source__copy p {
  margin: 1rem 0 0;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--mist);
}
.page-about .about-source__list {
  margin: 1.6rem 0 0;
  padding: 1.35rem 0 0;
  border-top: 1px solid var(--about-rule);
  list-style: none;
  display: grid;
  gap: 0.85rem;
}
.page-about .about-source__list li {
  display: grid;
  grid-template-columns: 2.3rem minmax(0, 1fr);
  gap: 0.75rem;
  align-items: baseline;
  font-size: 0.95rem;
  line-height: 1.72;
  color: var(--cold-white);
}
.page-about .about-source__list .mono {
  font-family: var(--font-num);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  color: var(--amber);
}
.page-about .about-source__figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--about-rule);
  background: var(--ink-800);
}
.page-about .about-source__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-about .about-source__figure .media-caption {
  padding: 0.75rem 1rem;
  font-size: 0.8rem;
  letter-spacing: 0.03em;
  color: var(--mist);
}

/* 团队与运营 */
.page-about .about-team {
  padding: clamp(3rem, 8vw, 6rem) 0;
}
.page-about .about-team__figure {
  margin: 0 0 clamp(2.25rem, 5vw, 3.5rem);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--about-rule);
}
.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.88;
}
.page-about .about-team__intro {
  max-width: 60ch;
  margin: 0.9rem 0 0;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--mist);
}
.page-about .about-team__grid {
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.page-about .about-team__card {
  background: var(--ink-800);
  padding: clamp(1.4rem, 3.2vw, 2.25rem);
  transition: background 0.35s var(--ease);
}
.page-about .about-team__card:hover {
  background: var(--ink-600);
}
.page-about .about-team__name {
  margin: 0 0 0.85rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--about-soft);
  font-family: var(--font-head);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.005em;
  color: var(--cold-white);
}
.page-about .about-team__card p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--mist);
}
.page-about .about-team__note {
  margin: clamp(1.5rem, 4vw, 2.25rem) 0 0;
  padding: 1.05rem 1.35rem;
  border-left: 2px solid var(--amber);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: rgba(255, 176, 32, 0.07);
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--mist);
}

/* 覆盖地区 */
.page-about .about-reach {
  padding: clamp(3rem, 8vw, 6rem) 0;
}
.page-about .about-reach__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 3.25rem);
}
.page-about .about-reach__copy p {
  margin: 1rem 0 0;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--mist);
}
.page-about .about-reach__nodes {
  display: grid;
  gap: 1.35rem;
  padding: clamp(1.25rem, 3vw, 1.9rem);
  border: 1px solid var(--about-rule);
  border-radius: var(--radius-lg);
  background: var(--ink-800);
}
.page-about .about-reach__node {
  display: grid;
  grid-template-columns: 4.6rem minmax(0, 1fr);
  grid-template-areas:
    "name bar"
    "name desc";
  gap: 0.3rem 1rem;
  align-items: center;
  --pct: 80%;
}
.page-about .about-reach__node:nth-child(1) { --pct: 100%; }
.page-about .about-reach__node:nth-child(2) { --pct: 88%; }
.page-about .about-reach__node:nth-child(3) { --pct: 84%; }
.page-about .about-reach__name {
  grid-area: name;
  font-family: var(--font-head);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--cold-white);
}
.page-about .about-reach__bar {
  grid-area: bar;
  display: block;
  width: 100%;
  height: 6px;
  border-radius: var(--radius-pill);
  background: rgba(44, 60, 110, 0.6);
  overflow: hidden;
}
.page-about .about-reach__bar::after {
  content: "";
  display: block;
  height: 100%;
  width: var(--pct);
  border-radius: inherit;
  background: linear-gradient(90deg, var(--neon), var(--cyan));
}
.page-about .about-reach__node:first-child .about-reach__bar::after {
  background: linear-gradient(90deg, var(--amber), var(--amber-deep));
}
.page-about .about-reach__desc {
  grid-area: desc;
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--mist);
}

/* 合作伙伴 */
.page-about .about-partners {
  padding: clamp(3rem, 8vw, 6rem) 0;
}
.page-about .about-partners__grid {
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1rem, 3vw, 2rem);
}
.page-about .about-partners__text {
  margin: 0;
  padding-left: 1.1rem;
  border-left: 2px solid rgba(53, 224, 200, 0.45);
  font-size: 1rem;
  line-height: 1.85;
  color: var(--mist);
}
.page-about .about-partners__tags {
  margin: 1.8rem 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

/* CTA */
.page-about .about-cta {
  padding: clamp(1.5rem, 5vw, 3rem) 0 clamp(2.5rem, 7vw, 5rem);
}
.page-about .about-cta__inner {
  position: relative;
  overflow: hidden;
  border-radius: clamp(20px, 3vw, 32px);
  border: 1px solid var(--about-rule);
  padding: clamp(1.85rem, 6vw, 3.75rem);
  background:
    radial-gradient(72% 130% at 8% -10%, rgba(182, 255, 59, 0.16), transparent 62%),
    radial-gradient(64% 130% at 102% 108%, rgba(53, 224, 200, 0.14), transparent 62%),
    linear-gradient(158deg, var(--ink-800), var(--ink-900));
}
.page-about .about-cta__title {
  margin: 0 0 0.85rem;
  font-family: var(--font-head);
  font-size: clamp(1.7rem, 4.2vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.012em;
  color: var(--cold-white);
}
.page-about .about-cta__text {
  max-width: 58ch;
  margin: 0;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--mist);
}
.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.75rem;
}

/* 焦点可见性 */
.page-about .about-crumbs a:focus-visible,
.page-about .about-node__body:focus-within {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
}

/* 窄屏微调 */
@media (max-width: 480px) {
  .page-about .about-hero__stats {
    grid-template-columns: minmax(0, 1fr);
  }
  .page-about .about-reach__node {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas:
      "name"
      "bar"
      "desc";
    gap: 0.4rem;
  }
  .page-about .about-source__list li {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.15rem;
  }
}

/* 中等屏 */
@media (min-width: 760px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-partners__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* 宽屏栅格 */
@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
    gap: clamp(2rem, 5vw, 4.5rem);
  }
  .page-about .about-hero__stats {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.55rem;
    padding: 0 0 0 1.6rem;
    border-top: 0;
    border-left: 1px solid var(--about-rule);
  }
  .page-about .about-source__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
    gap: clamp(2rem, 5vw, 4.25rem);
  }
  .page-about .about-reach__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    align-items: center;
    gap: clamp(2rem, 5vw, 4rem);
  }
  .page-about .about-axis {
    --axis-offset: -1.8rem;
    padding-left: 2.2rem;
  }
  .page-about .about-axis::before {
    left: 0.7rem;
  }
  .page-about .about-node {
    grid-template-columns: 11rem minmax(0, 1fr);
    gap: clamp(1.5rem, 4vw, 3rem);
    align-items: start;
  }
  .page-about .about-node__marker {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}