.page-about {
  color: var(--navy);
  overflow-x: clip;
}

.page-about .section {
  padding-block: clamp(56px, 7.5vw, 104px);
}

.page-about .about-crumbs {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: var(--slate);
}

.page-about .about-crumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(90, 107, 124, .55);
}

.page-about .about-crumbs a {
  color: var(--slate);
  text-decoration: none;
  border-bottom: 1px solid rgba(90, 107, 124, .4);
}

.page-about .about-crumbs a:hover,
.page-about .about-crumbs a:focus-visible {
  color: var(--sun-orange);
  border-bottom-color: var(--sun-orange);
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(96px, 12vw, 156px) clamp(52px, 7vw, 96px);
  background:
    radial-gradient(1080px 620px at 90% -14%, rgba(255, 176, 32, .32), transparent 62%),
    radial-gradient(820px 560px at 4% 112%, rgba(255, 224, 178, .62), transparent 62%),
    var(--sand);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 106, 0, .55), transparent);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 40px;
  align-items: center;
}

.page-about .about-hero__copy {
  min-width: 0;
}

.page-about .about-hero__copy h1 {
  margin: 8px 0 0;
  font-size: clamp(36px, 6.6vw, 74px);
  line-height: 1.06;
  letter-spacing: -.02em;
  font-weight: 900;
}

.page-about .about-hero__copy .lede {
  margin-top: 20px;
  max-width: 38em;
  color: var(--navy);
}

.page-about .about-hero__actions {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero__visual {
  position: relative;
  width: 100%;
  max-width: 430px;
  margin-inline: auto;
}

.page-about .about-hero__disc {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-hero__disc .ring {
  fill: none;
  stroke: rgba(11, 27, 51, .16);
  stroke-width: 1;
  stroke-dasharray: 3 9;
}

.page-about .about-hero__rays line {
  stroke: rgba(11, 27, 51, .1);
  stroke-width: 1;
}

.page-about .about-hero__disc .node {
  fill: var(--sun-orange);
  stroke: var(--sand);
  stroke-width: 3;
}

.page-about .about-hero__core {
  transition: transform .22s var(--ease);
  transform-origin: 210px 210px;
}

.page-about .about-hero__visual:hover .about-hero__core {
  transform: scale(1.05);
}

.page-about .about-hero__badge {
  position: absolute;
  left: 50%;
  bottom: 8%;
  transform: translateX(-50%);
  margin: 0;
  padding: 9px 20px;
  background: var(--paper);
  color: var(--navy);
  border-radius: var(--radius-pill);
  font-size: 14px;
  letter-spacing: .1em;
  box-shadow: var(--shadow-1);
  white-space: nowrap;
}

/* ============ 起点与初衷 ============ */
.page-about .about-origin {
  display: grid;
  gap: 32px;
  align-items: start;
}

.page-about .about-origin__text h2 {
  margin: 8px 0 18px;
  font-size: clamp(28px, 4.2vw, 48px);
  line-height: 1.14;
  letter-spacing: -.015em;
  font-weight: 900;
}

.page-about .about-origin__text p {
  max-width: 36em;
  color: var(--navy);
}

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

.page-about .about-origin__fact {
  background: var(--paper);
  border: 1px solid rgba(11, 27, 51, .08);
  border-left: 6px solid var(--sun-orange);
  border-radius: var(--radius-m);
  padding: 26px 26px 22px;
  box-shadow: var(--shadow-1);
}

.page-about .about-origin__fact .coord {
  color: var(--slate);
  font-size: 13px;
  letter-spacing: .06em;
}

.page-about .about-origin__num {
  margin: 10px 0 2px;
  font-family: var(--font-mono);
  font-size: clamp(46px, 8vw, 68px);
  line-height: 1;
  font-weight: 700;
  color: var(--sun-orange);
}

.page-about .about-origin__num span {
  font-size: .5em;
  vertical-align: super;
  margin-left: 2px;
}

.page-about .about-origin__factlabel {
  margin: 0 0 14px;
  font-weight: 600;
  color: var(--navy);
}

.page-about .about-origin__list {
  list-style: none;
  margin: 0;
  padding: 14px 0 0;
  border-top: 1px dashed rgba(11, 27, 51, .16);
  display: grid;
  gap: 10px;
  font-size: 15px;
  color: var(--slate);
}

.page-about .about-origin__list li {
  position: relative;
  padding-left: 18px;
}

.page-about .about-origin__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--sun-gold);
}

/* ============ 服务网络版图 ============ */
.page-about .about-network__head .lede {
  max-width: 44em;
  color: rgba(246, 241, 231, .82);
}

.page-about .about-map {
  display: grid;
  gap: 34px;
  align-items: center;
  margin-top: 38px;
}

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

.page-about .about-map__svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-map__rays line {
  stroke: rgba(246, 241, 231, .12);
  stroke-width: 1;
}

.page-about .about-map__rings circle {
  fill: none;
  stroke: rgba(246, 241, 231, .22);
  stroke-width: 1;
  stroke-dasharray: 4 8;
}

.page-about .about-map__core {
  fill: var(--sun-orange);
}

.page-about .about-map__node--city {
  fill: var(--sun-gold);
}

.page-about .about-map__node--region {
  fill: var(--cyan);
}

.page-about .about-map__labels text {
  fill: var(--sand);
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .04em;
}

.page-about .about-map__caption {
  margin-top: 14px;
  font-size: 14px;
  color: rgba(246, 241, 231, .6);
  text-align: center;
}

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

.page-about .about-network .filter-chip {
  min-height: 44px;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  background: rgba(246, 241, 231, .06);
  border: 1px solid rgba(246, 241, 231, .26);
  color: var(--sand);
  font-size: 15px;
  cursor: pointer;
  transition: background .18s var(--ease), border-color .18s var(--ease), color .18s var(--ease);
}

.page-about .about-network .filter-chip:hover {
  border-color: var(--sun-gold);
  color: var(--sun-gold);
}

.page-about .about-network .filter-chip[aria-pressed="true"] {
  background: var(--sun-orange);
  border-color: var(--sun-orange);
  color: #fff;
}

.page-about .about-network .filter-chip:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-about .about-map__cards {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(212px, 1fr));
}

.page-about .about-network .card {
  background: rgba(246, 241, 231, .06);
  border: 1px solid rgba(246, 241, 231, .16);
  border-radius: var(--radius-m);
  padding: 20px;
  transition: transform .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-network .card:hover {
  transform: translateY(-4px);
  border-color: rgba(38, 224, 214, .55);
}

.page-about .about-network .stat-value {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 34px);
  font-weight: 700;
  color: var(--cyan);
  margin: 0;
}

.page-about .about-network .stat-label {
  margin: 6px 0 0;
  font-size: 15px;
  line-height: 1.6;
  color: rgba(246, 241, 231, .78);
}

/* ============ 认证编号体系 ============ */
.page-about .about-code {
  background:
    linear-gradient(180deg, var(--sand) 0%, #FBF7EF 100%);
}

.page-about .about-code .section-head .lede {
  max-width: 42em;
}

.page-about .about-code__board {
  margin-top: 36px;
  display: grid;
  gap: 28px;
  background: var(--paper);
  border: 1px solid rgba(11, 27, 51, .08);
  border-radius: var(--radius-l);
  padding: clamp(22px, 3vw, 34px);
  box-shadow: var(--shadow-1);
}

.page-about .about-code__plate {
  border-radius: var(--radius-m);
  padding: clamp(26px, 5vw, 44px) 22px;
  text-align: center;
  background: linear-gradient(140deg, var(--sun-orange), var(--sun-gold));
  box-shadow: var(--shadow-sun);
}

.page-about .about-code__plate .coord {
  margin: 0;
  color: #fff;
  font-size: clamp(22px, 4vw, 34px);
  font-weight: 700;
  letter-spacing: .08em;
  text-shadow: 0 3px 12px rgba(6, 18, 31, .28);
}

.page-about .about-code__platenote {
  margin: 10px 0 0;
  color: rgba(255, 255, 255, .88);
  font-size: 14px;
  letter-spacing: .04em;
}

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

.page-about .about-code__parts > li {
  display: grid;
  gap: 6px;
  padding-bottom: 16px;
  border-bottom: 1px dashed rgba(11, 27, 51, .16);
}

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

.page-about .about-code__key {
  display: inline-block;
  width: max-content;
  padding: 4px 12px;
  border-radius: var(--radius-s);
  background: rgba(255, 224, 178, .55);
  border: 1px solid rgba(255, 106, 0, .35);
  color: var(--sun-orange);
  font-size: 16px;
  letter-spacing: .1em;
}

.page-about .about-code__parts p {
  margin: 0;
  color: var(--navy);
  font-size: 16px;
}

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

.page-about .about-code__notes .card {
  background: var(--paper);
  border: 1px solid rgba(11, 27, 51, .08);
  border-radius: var(--radius-m);
  padding: 24px;
  box-shadow: var(--shadow-1);
  transition: transform .2s var(--ease), box-shadow .2s var(--ease);
}

.page-about .about-code__notes .card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-2);
}

.page-about .about-code__notes h3 {
  margin: 0 0 10px;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -.01em;
}

.page-about .about-code__notes p {
  margin: 0;
  color: var(--slate);
  font-size: 16px;
}

/* ============ 维护与更新机制 ============ */
.page-about .about-maintain__grid {
  display: grid;
  gap: 38px;
  align-items: start;
}

.page-about .about-maintain__intro h2 {
  margin: 8px 0 18px;
  font-size: clamp(26px, 3.8vw, 44px);
  line-height: 1.16;
  letter-spacing: -.015em;
  font-weight: 900;
}

.page-about .about-maintain__intro > p {
  max-width: 36em;
  color: var(--navy);
}

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

.page-about .about-maintain__panels {
  display: grid;
  gap: 14px;
}

.page-about .about-maintain__panels .corona-panel {
  background: var(--paper);
  border: 1px solid rgba(11, 27, 51, .1);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-about .about-maintain__panels .corona-panel summary {
  cursor: pointer;
  padding: 18px 22px;
  font-weight: 700;
  font-size: 17px;
  color: var(--navy);
  min-height: 44px;
  display: flex;
  align-items: center;
  gap: 10px;
  list-style: none;
}

.page-about .about-maintain__panels .corona-panel summary::-webkit-details-marker {
  display: none;
}

.page-about .about-maintain__panels .corona-panel summary::before {
  content: "";
  flex: none;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--sun-orange);
  box-shadow: 0 0 0 4px rgba(255, 106, 0, .16);
  transition: box-shadow .18s var(--ease);
}

.page-about .about-maintain__panels .corona-panel[open] summary::before {
  box-shadow: 0 0 0 7px rgba(255, 106, 0, .22);
}

.page-about .about-maintain__panels .corona-panel summary:hover {
  background: rgba(255, 224, 178, .32);
}

.page-about .about-maintain__panels .corona-panel summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -3px;
}

.page-about .about-maintain__panels .corona-panel__body {
  padding: 0 22px 20px 54px;
  color: var(--slate);
  font-size: 16px;
}

/* ============ 团队与分工 ============ */
.page-about .about-team {
  background:
    radial-gradient(760px 420px at 100% 0%, rgba(255, 176, 32, .18), transparent 60%),
    var(--sand);
}

.page-about .about-team__cards {
  margin-top: 10px;
}

.page-about .about-team__cards .card {
  position: relative;
  background: var(--paper);
  border: 1px solid rgba(11, 27, 51, .08);
  border-radius: var(--radius-m);
  padding: 26px 24px 24px;
  box-shadow: var(--shadow-1);
  overflow: hidden;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-team__cards .card::after {
  content: "";
  position: absolute;
  inset: auto -30% -60% auto;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 176, 32, .3), transparent 70%);
  pointer-events: none;
}

.page-about .about-team__cards .card:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 106, 0, .4);
  box-shadow: var(--shadow-2);
}

.page-about .about-team__num {
  margin: 0;
  font-size: clamp(40px, 6vw, 56px);
  line-height: 1;
  font-weight: 700;
  color: var(--sun-orange);
}

.page-about .about-team__cards h3 {
  margin: 12px 0 10px;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -.01em;
}

.page-about .about-team__cards p:last-child {
  margin: 0;
  color: var(--slate);
  font-size: 16px;
}

/* ============ 发展历程 ============ */
.page-about .about-timeline .section-head .lede {
  max-width: 40em;
  color: rgba(246, 241, 231, .82);
}

.page-about .about-timeline__banner {
  margin-top: 36px;
  width: 100%;
  overflow: hidden;
  border-radius: 0;
}

.page-about .about-timeline__banner img {
  display: block;
  width: 100%;
  height: clamp(180px, 26vw, 320px);
  object-fit: cover;
  filter: saturate(.85) contrast(1.05);
}

.page-about .about-timeline__track {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  display: grid;
  gap: 26px;
}

.page-about .about-timeline__node {
  position: relative;
  padding: 20px 0 0 22px;
  border-left: 2px solid rgba(246, 241, 231, .18);
  transition: transform .22s var(--ease);
}

.page-about .about-timeline__node::before {
  content: "";
  position: absolute;
  left: -8px;
  top: 24px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--sun-orange);
  box-shadow: 0 0 0 5px rgba(255, 106, 0, .18);
}

.page-about .about-timeline__year {
  margin: 0;
  color: var(--cyan);
  font-size: 15px;
  letter-spacing: .12em;
}

.page-about .about-timeline__node h3 {
  margin: 8px 0 10px;
  font-size: 21px;
  font-weight: 800;
  color: var(--sand);
  letter-spacing: -.01em;
}

.page-about .about-timeline__node > p {
  margin: 0;
  color: rgba(246, 241, 231, .78);
  font-size: 16px;
}

.page-about .about-timeline__more {
  margin-top: 10px;
  color: rgba(246, 241, 231, .62);
  font-size: 15px;
}

.page-about .about-timeline__node:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 6px;
  border-radius: var(--radius-s);
}

/* ============ 年度汇总与行业参与 ============ */
.page-about .about-yearly__grid {
  display: grid;
  gap: 34px;
  align-items: start;
}

.page-about .about-yearly__main h2 {
  margin: 8px 0 18px;
  font-size: clamp(26px, 3.8vw, 44px);
  line-height: 1.16;
  letter-spacing: -.015em;
  font-weight: 900;
}

.page-about .about-yearly__main p {
  max-width: 36em;
  color: var(--navy);
}

.page-about .about-yearly__main p + p {
  margin-top: 16px;
}

.page-about .about-yearly__side {
  display: grid;
  gap: 12px;
  background: var(--paper);
  border: 1px solid rgba(11, 27, 51, .08);
  border-radius: var(--radius-l);
  padding: 22px;
  box-shadow: var(--shadow-1);
}

.page-about .about-yearly__item {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding-bottom: 12px;
  border-bottom: 1px dashed rgba(11, 27, 51, .14);
}

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

.page-about .about-yearly__item span {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--sun-orange);
}

.page-about .about-yearly__item p {
  margin: 0;
  font-size: 16px;
  color: var(--navy);
}

/* ============ 从哪里开始查询 ============ */
.page-about .about-start {
  position: relative;
  background:
    radial-gradient(900px 520px at 88% 110%, rgba(255, 106, 0, .36), transparent 62%),
    var(--navy);
  color: var(--sand);
}

.page-about .about-start__inner {
  max-width: 880px;
}

.page-about .about-start .eyebrow {
  color: var(--sun-gold);
}

.page-about .about-start h2 {
  margin: 8px 0 18px;
  font-size: clamp(28px, 4.4vw, 52px);
  line-height: 1.12;
  letter-spacing: -.018em;
  font-weight: 900;
  color: var(--sand);
}

.page-about .about-start p {
  max-width: 40em;
  color: rgba(246, 241, 231, .84);
}

.page-about .about-start__actions {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-start .btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ============ 响应式 ============ */
@media (min-width: 640px) {
  .page-about .about-code__parts > li {
    grid-template-columns: minmax(84px, 120px) minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }
}

@media (min-width: 860px) {
  .page-about .about-origin {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, .65fr);
    gap: 52px;
  }

  .page-about .about-yearly__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .7fr);
    gap: 52px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    gap: 56px;
  }

  .page-about .about-timeline__track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
    margin-top: 56px;
  }

  .page-about .about-timeline__track::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 24px;
    height: 2px;
    background: linear-gradient(90deg, var(--sun-orange), var(--sun-gold), rgba(246, 241, 231, .16));
  }

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

  .page-about .about-timeline__node {
    padding: 56px 26px 0 0;
    border-left: 0;
  }

  .page-about .about-timeline__node::before {
    left: 0;
    top: 17px;
  }

  .page-about .about-timeline__more {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    margin-top: 0;
    transition: max-height .22s var(--ease), opacity .22s var(--ease), margin-top .22s var(--ease);
  }

  .page-about .about-timeline__node:hover .about-timeline__more,
  .page-about .about-timeline__node:focus-within .about-timeline__more {
    max-height: 240px;
    opacity: 1;
    margin-top: 12px;
  }

  .page-about .about-timeline__node:hover {
    transform: translateY(-4px);
  }
}

@media (min-width: 960px) {
  .page-about .about-map {
    grid-template-columns: minmax(0, .88fr) minmax(0, 1.12fr);
    gap: 52px;
  }

  .page-about .about-code__board {
    grid-template-columns: minmax(0, .78fr) minmax(0, 1.22fr);
    align-items: center;
    gap: 44px;
  }

  .page-about .about-maintain__grid {
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
    gap: 52px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero__core,
  .page-about .about-network .card,
  .page-about .about-code__notes .card,
  .page-about .about-team__cards .card,
  .page-about .about-timeline__node {
    transition: none;
  }

  .page-about .about-hero__visual:hover .about-hero__core {
    transform: none;
  }
}
</main>