.page-about {
  --about-line-x: 150px;
  overflow-wrap: break-word;
}

.page-about .about-crumb {
  padding-top: clamp(14px, 2.6vw, 28px);
}

.page-about .about-head {
  max-width: 62ch;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .about-head .gg-title {
  margin: 10px 0 12px;
}

/* ---------- 01 首屏 ---------- */
.page-about .about-intro {
  padding-top: clamp(22px, 4vw, 44px);
}

.page-about .about-intro__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2.6vw, 26px);
}

.page-about .about-intro__title {
  margin: 0 0 clamp(14px, 2.4vw, 22px);
}

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

.page-about .about-intro__facts {
  list-style: none;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-fact {
  padding: 14px 16px 16px;
  border: var(--gg-bw) solid var(--gg-line);
  border-radius: var(--gg-radius);
  background: linear-gradient(155deg, rgba(0, 229, 255, 0.12), rgba(0, 229, 255, 0) 68%);
}

.page-about .about-fact__k {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gg-graphite);
}

.page-about .about-fact__v {
  display: flex;
  align-items: baseline;
  gap: 4px;
  font-size: clamp(1.6rem, 3.6vw, 2.3rem);
  line-height: 1;
  color: var(--gg-cyan);
}

.page-about .about-fact__v em {
  font-style: normal;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--gg-graphite);
}

/* ---------- 02 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: clamp(16px, 2.6vw, 26px);
}

.page-about .about-stage {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .about-stage__marker {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-about .about-stage__num {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border: var(--gg-bw) solid var(--gg-cyan);
  border-radius: 50%;
  background: var(--gg-abyss);
  color: var(--gg-cyan);
  font-size: 14px;
}

.page-about .about-stage__span {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gg-graphite);
}

.page-about .about-stage__card {
  padding: clamp(16px, 2.6vw, 26px);
}

.page-about .about-stage__title {
  margin: 0 0 10px;
  font-size: clamp(1.1rem, 2.2vw, 1.35rem);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--gg-white);
}

.page-about .about-stage__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--gg-ice);
}

.page-about .about-stage__more {
  margin-top: 14px;
  padding-top: 10px;
  border-top: 1px dashed var(--gg-line-soft);
}

.page-about .about-stage__more summary {
  cursor: pointer;
  list-style: none;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--gg-cyan);
}

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

.page-about .about-stage__more summary::before {
  content: "▸ ";
}

.page-about .about-stage__more[open] summary::before {
  content: "▾ ";
}

.page-about .about-stage__more summary:focus-visible {
  outline: var(--gg-bw) solid var(--gg-coral);
  outline-offset: 3px;
}

.page-about .about-stage__more p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--gg-graphite);
}

.page-about .about-track__figure {
  margin: clamp(30px, 5vw, 52px) 0 0;
}

.page-about .about-track__media img,
.page-about .about-map__media img,
.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 03 分类标准 ---------- */
.page-about .about-classify__axis {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-device {
  padding: clamp(16px, 2.4vw, 24px);
  border: var(--gg-bw) solid var(--gg-ink);
  border-radius: var(--gg-radius);
  background: var(--gg-white);
  color: var(--gg-ink);
  box-shadow: var(--gg-shadow);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.page-about .about-device:hover {
  transform: translateY(-4px);
  box-shadow: var(--gg-shadow-hover);
}

.page-about .about-device--coral {
  border-color: var(--gg-coral);
  background: linear-gradient(150deg, rgba(255, 107, 74, 0.14), var(--gg-white) 62%);
}

.page-about .about-device__tag {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: rgba(11, 37, 69, 0.72);
}

.page-about .about-device__name {
  margin: 0 0 8px;
  font-size: clamp(1.2rem, 2.6vw, 1.6rem);
  font-weight: 500;
  color: var(--gg-ink);
}

.page-about .about-device__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(7, 19, 32, 0.78);
}

.page-about .about-regions {
  list-style: none;
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-region {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px 18px;
  border: var(--gg-bw) solid rgba(7, 19, 32, 0.85);
  border-radius: var(--gg-radius);
  background: var(--gg-white);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.page-about .about-region:hover {
  transform: translateY(-4px);
  border-color: var(--gg-coral);
  box-shadow: var(--gg-shadow-hover);
}

.page-about .about-region__name {
  font-size: 15px;
  font-weight: 600;
  color: var(--gg-ink);
}

.page-about .about-region__count {
  font-size: 13px;
  color: rgba(7, 19, 32, 0.7);
  transition: color 0.25s ease;
}

.page-about .about-region__count .gg-num {
  font-size: 18px;
}

.page-about .about-region:hover .about-region__count {
  color: var(--gg-coral);
}

.page-about .about-map {
  margin: clamp(24px, 4vw, 40px) 0 0;
}

.page-about .about-map__cap {
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(7, 19, 32, 0.72);
}

.page-about .about-classify__note {
  margin: clamp(22px, 3.4vw, 34px) 0 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(7, 19, 32, 0.82);
}

/* ---------- 04 团队 ---------- */
.page-about .about-bars {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: clamp(12px, 2vw, 18px);
}

.page-about .about-bar {
  flex: 1 1 100%;
  padding: 16px 18px 18px;
  border: var(--gg-bw) solid var(--gg-line);
  border-radius: var(--gg-radius);
  background: var(--gg-mid);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.page-about .about-bar:hover {
  transform: translateY(-4px);
  border-color: var(--gg-coral);
  box-shadow: var(--gg-shadow-hover);
}

.page-about .about-bar__fill {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--gg-line-soft);
}

.page-about .about-bar__role {
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--gg-ice);
}

.page-about .about-bar__count {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  line-height: 1;
  color: var(--gg-cyan);
}

.page-about .about-bar--tech .about-bar__count {
  color: var(--gg-cyan-soft);
}

.page-about .about-bar--care .about-bar__count {
  color: var(--gg-coral);
}

.page-about .about-bar__duty {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--gg-graphite);
}

.page-about .about-team__figure {
  margin: clamp(28px, 4vw, 44px) 0 0;
}

/* ---------- 05 合作生态 ---------- */
.page-about .about-eco__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.6vw, 40px);
}

.page-about .about-eco__text p {
  margin: 0 0 1.1em;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.78;
}

.page-about .about-eco__tags {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-eco__aside {
  padding: clamp(18px, 2.6vw, 26px);
}

.page-about .about-eco__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-eco__list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--gg-line-soft);
  font-size: 14px;
  color: var(--gg-graphite);
}

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

.page-about .about-eco__list b {
  font-weight: 400;
  color: var(--gg-ice);
}

.page-about .about-eco__list .gg-num {
  font-size: 17px;
  color: var(--gg-cyan);
}

/* ---------- 06 服务时效 ---------- */
.page-about .about-panel .gg-status {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .about-panel .gg-status__item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px dashed var(--gg-line-soft);
}

.page-about .about-panel .gg-status__item:last-child {
  border-bottom: 0;
}

.page-about .about-panel .gg-status__key {
  font-size: 14px;
  color: var(--gg-graphite);
}

.page-about .about-panel .gg-status__val {
  font-size: 15px;
  text-align: right;
  color: var(--gg-ice);
}

.page-about .about-sla__note {
  margin: clamp(20px, 3vw, 30px) 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--gg-graphite);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .about-regions {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-about .about-classify__axis {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

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

@media (min-width: 760px) {
  .page-about .about-panel .gg-status {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(20px, 3vw, 40px);
  }
}

@media (min-width: 860px) {
  .page-about {
    --about-line-x: 158px;
  }

  .page-about .about-intro__grid {
    grid-template-columns: var(--about-line-x) minmax(0, 1fr);
    gap: clamp(24px, 4vw, 52px);
    align-items: start;
  }

  .page-about .about-intro__index {
    padding-top: 14px;
  }

  .page-about .about-stage {
    grid-template-columns: var(--about-line-x) minmax(0, 1fr);
    gap: clamp(22px, 3.4vw, 44px);
  }

  .page-about .about-stage__marker {
    flex-direction: column;
    align-items: flex-end;
    justify-content: flex-start;
    gap: 10px;
    padding-top: 20px;
    text-align: right;
  }

  .page-about .about-timeline::before {
    content: "";
    position: absolute;
    left: var(--about-line-x);
    top: 10px;
    bottom: 10px;
    width: var(--gg-bw);
    opacity: 0.55;
    pointer-events: none;
    background: linear-gradient(180deg, var(--gg-cyan) 0%, rgba(0, 229, 255, 0.1) 100%);
  }

  .page-about .about-track__figure {
    margin-left: var(--about-line-x);
  }

  .page-about .about-bar--edit {
    flex: 26 1 0;
  }

  .page-about .about-bar--tech {
    flex: 24 1 0;
  }

  .page-about .about-bar--care {
    flex: 18 1 0;
  }
}

@media (min-width: 900px) {
  .page-about .about-eco__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 1040px) {
  .page-about .about-regions {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

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

  .page-about .about-device:hover,
  .page-about .about-region:hover,
  .page-about .about-bar:hover {
    transform: none;
  }
}
<<<END>>>