.page-about {
  overflow-x: clip;
  background: var(--paper);
  color: var(--ink);
}

/* ---------- 面包屑条 ---------- */
.page-about .about-crumbbar {
  background: var(--turf-shadow);
  border-bottom: 1px solid rgba(247, 212, 140, 0.18);
}

.page-about .about-crumbbar .breadcrumbs {
  padding: 12px 0;
  color: var(--on-dark);
  font-size: 14px;
}

.page-about .about-crumbbar .breadcrumbs a {
  color: var(--amber-soft);
  text-decoration: none;
}

.page-about .about-crumbbar .breadcrumbs a:hover {
  text-decoration: underline;
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 36px 0 46px;
  background:
    radial-gradient(120% 140% at 88% 10%, rgba(30, 107, 74, 0.9) 0%, rgba(15, 61, 46, 0.96) 46%, var(--turf-shadow) 100%);
  color: var(--paper);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.55;
  background-image: repeating-linear-gradient(to bottom, rgba(247, 212, 140, 0.34) 0 1px, transparent 1px 30px);
  background-size: 16px 30px;
  background-repeat: repeat-y;
  background-position: left 0 top 0;
  -webkit-mask-image: linear-gradient(to right, #000 0 16px, transparent 16px);
  mask-image: linear-gradient(to right, #000 0 16px, transparent 16px);
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: 30px;
}

.page-about .about-kicker {
  display: inline-block;
  margin: 0;
  padding: 5px 10px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
  background: rgba(229, 161, 31, 0.08);
  border: 1px solid rgba(229, 161, 31, 0.42);
  border-radius: 2px;
}

.page-about .about-hero h1 {
  margin: 18px 0 0;
  font-family: var(--f-cn);
  font-weight: 700;
  font-size: 29px;
  line-height: 1.3;
  letter-spacing: 0.01em;
}

.page-about .about-lede {
  margin: 18px 0 0;
  font-size: 17px;
  line-height: 1.78;
  color: var(--on-dark);
  max-width: 60ch;
}

.page-about .about-facts {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(247, 212, 140, 0.22);
  border: 1px solid rgba(247, 212, 140, 0.22);
}

.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 14px 16px;
  background: rgba(11, 46, 34, 0.74);
}

.page-about .about-fact__num {
  font-family: var(--f-mono);
  font-size: 23px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--amber);
}

.page-about .about-fact__label {
  font-size: 14px;
  line-height: 1.5;
  color: var(--on-dark-dim);
}

.page-about .about-hero__figure {
  margin: 0 0 12px;
  padding: 10px;
  background: rgba(245, 241, 231, 0.07);
  border: 1px solid rgba(247, 212, 140, 0.34);
  box-shadow: var(--shadow-print);
}

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

/* ---------- 起点 ---------- */
.page-about .about-origin__grid {
  display: grid;
  gap: 26px;
}

.page-about .about-origin__text p {
  margin: 0 0 16px;
}

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

.page-about .about-note {
  padding: 22px 20px 24px;
  background: var(--paper-lift);
  border: 1px solid var(--line);
  border-top: 4px solid var(--turf-mid);
  box-shadow: var(--shadow-print);
}

.page-about .about-note__label {
  margin: 0 0 14px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-about .about-note__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-note__list li {
  position: relative;
  padding: 9px 0 9px 18px;
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--ink-soft);
  border-bottom: 1px dashed var(--line-soft);
}

.page-about .about-note__list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-note__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  width: 7px;
  height: 7px;
  background: var(--amber);
}

/* ---------- 收录范围 ---------- */
.page-about .about-regions {
  display: grid;
  gap: 16px;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .about-region {
  position: relative;
  padding: 22px 20px 26px;
  background: var(--paper-lift);
  border: 1px solid var(--line);
  transition: transform var(--t), box-shadow var(--t), border-color var(--t);
}

.page-about .about-region::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: var(--turf-mid);
  transform: scaleX(0.26);
  transform-origin: left center;
  transition: transform var(--t), background-color var(--t);
}

.page-about .about-region:hover {
  transform: translateY(-3px);
  border-color: rgba(229, 161, 31, 0.5);
  box-shadow: var(--shadow-print);
}

.page-about .about-region:hover::after {
  transform: scaleX(1);
  background: var(--amber);
}

.page-about .about-region__code {
  margin: 0;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--slate);
}

.page-about .about-region__name {
  margin: 8px 0 10px;
  font-size: 21px;
  font-weight: 700;
  line-height: 1.4;
}

.page-about .about-region__text {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-about .about-scope__bar {
  list-style: none;
  margin: 28px 0 0;
  padding: 16px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  border-top: 2px solid var(--ink);
  font-size: 15px;
  color: var(--slate);
}

.page-about .about-scope__bar li {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
}

.page-about .about-scope__bar .u-mono {
  font-family: var(--f-mono);
  font-weight: 700;
  font-size: 17px;
  color: var(--ink);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: 16px;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .about-role {
  padding: 22px 20px 24px;
  background: var(--paper-lift);
  border: 1px solid var(--line);
  border-left: 5px solid var(--turf-mid);
}

.page-about .about-role--lead {
  background: linear-gradient(150deg, var(--turf-deep) 0%, var(--turf-shadow) 100%);
  border-color: rgba(247, 212, 140, 0.28);
  border-left-color: var(--amber);
  color: var(--paper);
}

.page-about .about-role--lead .about-role__num {
  color: var(--amber-soft);
}

.page-about .about-role--lead h3 {
  color: var(--paper);
}

.page-about .about-role--lead p {
  color: var(--on-dark);
}

.page-about .about-role__num {
  margin: 0 0 6px;
  font-family: var(--f-mono);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--turf-mid);
}

.page-about .about-role h3 {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
}

.page-about .about-role p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ink-soft);
}

/* ---------- 版本演进时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  position: relative;
  margin: 0;
  padding: 0 0 0 26px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--turf-mid), var(--amber), var(--slate-soft));
}

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

.page-about .about-tl + .about-tl {
  margin-top: 22px;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 24px;
  width: 12px;
  height: 12px;
  box-sizing: border-box;
  border-radius: 50%;
  background: var(--paper);
  border: 3px solid var(--turf-mid);
}

.page-about .about-tl__card {
  padding: 18px 20px 20px;
  background: var(--paper-lift);
  border: 1px solid var(--line);
  border-top: 3px solid var(--turf-mid);
  transition: box-shadow var(--t), transform var(--t);
}

.page-about .about-tl__card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-print);
}

.page-about .about-tl__year {
  margin: 0 0 8px;
  font-family: var(--f-mono);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--amber);
}

.page-about .about-tl__card h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
}

.page-about .about-tl__card p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-about .about-history__figure {
  margin: 34px auto 0;
  max-width: 720px;
  padding: 10px 10px 12px;
  background: var(--paper-lift);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-print);
}

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

.page-about .about-history__cap {
  margin: 10px 2px 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 长期运营 ---------- */
.page-about .about-partners__grid {
  display: grid;
  gap: 26px;
}

.page-about .about-partners__figure {
  margin: 0 0 12px;
  padding: 8px;
  background: var(--paper-lift);
  border: 1px solid var(--line);
}

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

.page-about .about-partners__copy h2 {
  margin: 12px 0 14px;
  font-size: 25px;
  font-weight: 700;
  line-height: 1.35;
}

.page-about .about-partners__copy p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-partners__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

/* ---------- 下一步 ---------- */
.page-about .about-next__inner {
  padding: 30px 24px 32px;
  background: linear-gradient(150deg, var(--turf-deep) 0%, var(--turf-shadow) 100%);
  border: 1px solid rgba(247, 212, 140, 0.26);
  color: var(--paper);
}

.page-about .about-next__kicker {
  margin: 0 0 10px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--amber);
}

.page-about .about-next__copy h2 {
  margin: 0 0 12px;
  font-size: 24px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .about-next__copy p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--on-dark);
  max-width: 62ch;
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-about .about-next__legal {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
}

.page-about .about-next__legal a {
  color: var(--turf-mid);
  text-decoration: underline;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .about-hero {
    padding: 52px 0 60px;
  }

  .page-about .about-hero h1 {
    font-size: 38px;
  }

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

  .page-about .about-partners__copy h2 {
    font-size: 28px;
  }

  .page-about .about-next__inner {
    padding: 38px 36px 40px;
  }

  .page-about .about-next__copy h2 {
    font-size: 28px;
  }
}

@media (min-width: 900px) {
  .page-about .about-regions {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

  /* 时间轴左右交替 */
  .page-about .about-timeline {
    padding-left: 0;
  }

  .page-about .about-timeline::before {
    left: 50%;
    transform: translateX(-1px);
  }

  .page-about .about-tl {
    width: 50%;
    padding-right: 40px;
  }

  .page-about .about-tl::before {
    left: auto;
    right: -6px;
    top: 26px;
  }

  .page-about .about-tl:nth-child(even) {
    margin-left: 50%;
    padding-right: 0;
    padding-left: 40px;
  }

  .page-about .about-tl:nth-child(even)::before {
    left: -6px;
    right: auto;
  }

  .page-about .about-tl + .about-tl {
    margin-top: 26px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
    gap: 46px;
  }

  .page-about .about-hero h1 {
    font-size: 44px;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: center;
    gap: 42px;
  }

  .page-about .about-partners__figure {
    margin-bottom: 0;
  }

  .page-about .about-next__inner {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 36px;
  }

  .page-about .about-next__actions {
    margin-top: 0;
    flex: 0 0 auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-region,
  .page-about .about-region::after,
  .page-about .about-tl__card {
    transition: none;
  }

  .page-about .about-region:hover,
  .page-about .about-tl__card:hover {
    transform: none;
  }
}