.page-about {
  --about-maxw: 1160px;
  --about-gap: 18px;
  overflow-x: clip;
  background: linear-gradient(180deg, var(--c-navy) 0%, var(--c-navy-deep) 100%);
  color: var(--c-white);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: 22px 30px;
}

.page-about .about-hero .kb-breadcrumb {
  margin-bottom: 18px;
}

.page-about .about-hero__frame {
  position: relative;
  padding: 26px 20px 26px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background:
    radial-gradient(720px 360px at 92% -18%, rgba(227, 192, 112, 0.16), transparent 66%),
    linear-gradient(158deg, rgba(18, 41, 74, 0.95) 0%, rgba(8, 21, 42, 0.98) 68%);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--grad-gold);
  opacity: 0.72;
}

.page-about .about-hero__note {
  display: none;
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-size: clamp(30px, 8.4vw, 56px);
  line-height: 1.14;
  font-weight: 800;
  letter-spacing: -0.015em;
  max-width: 16em;
}

.page-about .about-hero__title em {
  font-style: normal;
  background: var(--grad-gold);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .about-hero__lede {
  margin: 16px 0 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(244, 247, 251, 0.78);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-about .about-index {
  display: flex;
  gap: 8px;
  margin-top: 18px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: none;
}

.page-about .about-index::-webkit-scrollbar {
  display: none;
}

.page-about .about-index a {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 13px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  color: rgba(244, 247, 251, 0.72);
  font-size: 13px;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-index a span {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-stone);
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  border-color: var(--c-gold-line);
  color: var(--c-gold-a);
}

/* ---------- 章节标题 ---------- */
.page-about .about-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: 22px;
}

.page-about .about-head .kb-section__title {
  margin: 0;
  font-size: clamp(23px, 5.4vw, 34px);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.01em;
}

.page-about .about-head--dark {
  border-bottom-color: rgba(10, 15, 24, 0.18);
}

.page-about .about-head--dark .kb-section__title {
  color: var(--c-ink);
}

.page-about .about-head--dark .kb-section__num {
  color: var(--c-clay);
}

/* ---------- 01 做什么 ---------- */
.page-about .about-what__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

.page-about .about-what__text p {
  margin: 0 0 14px;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(244, 247, 251, 0.78);
}

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

.page-about .about-what__text strong {
  color: var(--c-gold-a);
  font-weight: 700;
}

.page-about .about-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-facts li {
  position: relative;
  padding: 13px 15px 13px 34px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: rgba(18, 41, 74, 0.55);
  font-size: 14px;
  line-height: 1.7;
  color: rgba(244, 247, 251, 0.84);
}

.page-about .about-facts li::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 20px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--grad-gold);
}

/* ---------- 02 规模与节奏 ---------- */
.page-about .about-scale__lede {
  margin: 0 0 22px;
  max-width: 34em;
  font-size: 15.5px;
  line-height: 1.9;
  color: rgba(244, 247, 251, 0.74);
}

.page-about .about-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--line-soft);
  overflow: hidden;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 16px;
  background: rgba(11, 27, 51, 0.95);
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--c-gold-a);
}

.page-about .about-stat__num em {
  font-style: normal;
  font-size: 13px;
  margin-left: 5px;
  letter-spacing: 0;
  color: var(--c-stone);
}

.page-about .about-stat__label {
  font-size: 13.5px;
  line-height: 1.65;
  color: rgba(244, 247, 251, 0.7);
}

.page-about .about-rhythm {
  display: grid;
  gap: 10px;
  margin-top: 22px;
  padding: 18px 16px;
  border-left: 2px solid var(--c-gold-line);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(18, 41, 74, 0.42);
}

.page-about .about-rhythm p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(244, 247, 251, 0.78);
}

.page-about .about-rhythm__key {
  display: inline-block;
  min-width: 5em;
  font-weight: 700;
  color: var(--c-white);
}

/* ---------- 通用图容器 ---------- */
.page-about .about-figure {
  margin: 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--c-navy-card);
  box-shadow: var(--shadow-card);
}

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

.page-about .about-figure__cap {
  padding: 10px 14px 12px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--c-stone);
  border-top: 1px solid var(--line-soft);
}

/* ---------- 03 访问路径 ---------- */
.page-about .about-paths-section .about-figure {
  margin-bottom: 22px;
}

.page-about .about-paths {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-path {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 20px 18px 22px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(18, 41, 74, 0.74) 0%, rgba(11, 27, 51, 0.94) 100%);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-path:hover {
  border-color: var(--c-gold-line);
  transform: translateY(-2px);
}

.page-about .about-path--phone {
  background: linear-gradient(180deg, rgba(217, 116, 31, 0.14) 0%, rgba(11, 27, 51, 0.94) 62%);
}

.page-about .about-path--return {
  background: linear-gradient(180deg, rgba(78, 142, 122, 0.14) 0%, rgba(11, 27, 51, 0.94) 62%);
}

.page-about .about-path .kb-status {
  align-self: flex-start;
}

.page-about .about-path__title {
  margin: 0;
  font-size: 20px;
  font-weight: 800;
  line-height: 1.3;
}

.page-about .about-path__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(244, 247, 251, 0.76);
}

.page-about .about-path__steps {
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 12px 0 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-path__steps > div {
  display: grid;
  grid-template-columns: 5.4em minmax(0, 1fr);
  gap: 8px;
  align-items: start;
}

.page-about .about-path__steps dt {
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--c-stone);
  letter-spacing: 0.04em;
}

.page-about .about-path__steps dd {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(244, 247, 251, 0.86);
}

.page-about .about-path__foot {
  margin-top: auto;
  padding-top: 6px;
}

/* ---------- 04 栏目地图 ---------- */
.page-about .about-columns__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-about .about-figure--map {
  border-color: rgba(10, 15, 24, 0.16);
  background: rgba(11, 27, 51, 0.96);
  box-shadow: none;
}

.page-about .about-map__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

.page-about .about-map__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-rows: auto auto;
  column-gap: 12px;
  row-gap: 4px;
  align-items: center;
  padding: 14px 16px;
  border: 1px solid rgba(10, 15, 24, 0.16);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.62);
  text-decoration: none;
  color: inherit;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .about-map__link:hover,
.page-about .about-map__link:focus-visible {
  border-color: var(--c-gold-b);
  background: #FFFFFF;
}

.page-about .about-map__idx {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: 17px;
  color: var(--c-stone);
  transition: color var(--dur) var(--ease);
}

.page-about .about-map__link:hover .about-map__idx {
  color: var(--c-gold-b);
}

.page-about .about-map__name {
  font-size: 16px;
  font-weight: 800;
  color: var(--c-ink);
}

.page-about .about-map__desc {
  font-size: 13.5px;
  line-height: 1.65;
  color: rgba(10, 15, 24, 0.68);
}

/* ---------- 05 团队与流程 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}

.page-about .about-team__lede {
  margin: 0 0 18px;
  max-width: 36em;
  font-size: 15.5px;
  line-height: 1.9;
  color: rgba(244, 247, 251, 0.78);
}

.page-about .about-roles {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 1px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: var(--line-soft);
  overflow: hidden;
}

.page-about .about-role {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 13px 15px;
  background: rgba(11, 27, 51, 0.95);
}

.page-about .about-role__num {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  min-width: 2.2em;
  color: var(--c-gold-a);
}

.page-about .about-role__txt {
  font-size: 14px;
  line-height: 1.65;
  color: rgba(244, 247, 251, 0.82);
}

.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: flow;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

.page-about .about-flow li {
  position: relative;
  padding: 14px 16px 14px 48px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: rgba(18, 41, 74, 0.44);
  font-size: 14px;
  line-height: 1.7;
  color: rgba(244, 247, 251, 0.84);
}

.page-about .about-flow li::before {
  counter-increment: flow;
  content: counter(flow, decimal-leading-zero);
  position: absolute;
  left: 15px;
  top: 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-jade);
}

.page-about .about-flow li::after {
  content: "";
  position: absolute;
  left: 21px;
  bottom: -11px;
  width: 1px;
  height: 10px;
  background: var(--line-mid);
}

.page-about .about-flow li:last-child::after {
  display: none;
}

.page-about .about-figure--flow {
  margin-top: 4px;
}

/* ---------- 收束 ---------- */
.page-about .about-next__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  padding: 26px 20px;
  border: 1px solid var(--c-gold-line);
  border-radius: var(--radius);
  background: linear-gradient(140deg, rgba(18, 41, 74, 0.94) 0%, rgba(8, 21, 42, 0.97) 100%);
  box-shadow: var(--shadow-panel);
}

.page-about .about-next__title {
  margin: 0 0 10px;
  font-size: clamp(22px, 5vw, 30px);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: -0.01em;
}

.page-about .about-next__text {
  margin: 0;
  max-width: 44em;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(244, 247, 251, 0.76);
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__frame {
    padding: 32px 28px 30px;
  }

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

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

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

  .page-about .about-flow li:nth-child(2)::after {
    display: none;
  }

  .page-about .about-next__inner {
    padding: 32px 30px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding-block: 30px 44px;
  }

  .page-about .about-hero__frame {
    padding: 44px 40px 40px 46px;
  }

  .page-about .about-hero__note {
    display: block;
    position: absolute;
    top: 34px;
    right: 22px;
    color: var(--c-gold-a);
    opacity: 0.86;
  }

  .page-about .about-hero__title {
    max-width: 13em;
  }

  .page-about .about-hero__lede {
    max-width: 40em;
    font-size: 17px;
  }

  .page-about .about-index {
    gap: 10px;
  }

  .page-about .about-what__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-rhythm {
    padding: 22px 24px;
  }

  .page-about .about-paths {
    grid-template-columns: 1.34fr 1fr 1.12fr;
    align-items: stretch;
  }

  .page-about .about-columns__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 28px;
    align-items: start;
  }

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

  .page-about .about-team {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 34px;
    align-items: start;
  }

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

  .page-about .about-flow li:nth-child(2)::after {
    display: block;
  }

  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 28px;
  }

  .page-about .about-next__links {
    justify-content: flex-end;
    max-width: 22em;
  }
}

@media (min-width: 1120px) {
  .page-about .about-map__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-path,
  .page-about .about-index a,
  .page-about .about-map__link,
  .page-about .about-map__idx {
    transition: none;
  }

  .page-about .about-path:hover {
    transform: none;
  }
}