.page-about {
  display: block;
  padding-bottom: clamp(44px, 7vw, 88px);
  overflow-x: clip;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

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

.page-about .breadcrumb {
  margin-block: clamp(14px, 3vw, 24px) clamp(16px, 3vw, 26px);
}

/* ---------- 首屏 ---------- */

.page-about .about-lede {
  padding-bottom: clamp(34px, 6vw, 70px);
}

.page-about .about-lede__grid {
  display: grid;
  gap: clamp(26px, 5vw, 44px);
  align-items: center;
}

.page-about .about-lede__copy h1 {
  margin: .5em 0 .7em;
  font-size: clamp(30px, 6.2vw, 52px);
  line-height: 1.16;
  letter-spacing: -.01em;
}

.page-about .about-lede__copy .lede {
  margin: 0;
  max-width: 46ch;
}

.page-about .about-lede__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-lede__figure {
  position: relative;
  isolation: isolate;
}

.page-about .about-lede__figure::before {
  content: "";
  position: absolute;
  inset: -14% -10% auto auto;
  width: 62%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(47, 230, 200, .22), rgba(53, 167, 255, .08) 52%, transparent 72%);
  pointer-events: none;
  z-index: -1;
}

.page-about .about-lede__figure img {
  position: relative;
  display: block;
  width: 100%;
  border-radius: var(--radius-l);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-panel);
}

.page-about .about-lede__figure .figure__caption {
  margin-top: 14px;
}

@media (min-width: 900px) {
  .page-about .about-lede__grid {
    grid-template-columns: 1.12fr .88fr;
    align-items: center;
  }
}

/* ---------- 首屏数据条 ---------- */

.page-about .about-metrics {
  list-style: none;
  margin: clamp(30px, 5vw, 52px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-about .about-metrics .stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(16px, 3vw, 24px);
  background: linear-gradient(160deg, var(--panel), var(--panel-2));
}

.page-about .about-metrics .stat__value {
  font-family: var(--font-mono);
  font-size: clamp(24px, 4.4vw, 34px);
  line-height: 1.05;
  letter-spacing: .01em;
  color: var(--gold);
}

.page-about .about-metrics .stat__key {
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--slate);
}

@media (min-width: 720px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 发展历程轨道 ---------- */

.page-about .about-history {
  position: relative;
  padding-block: clamp(34px, 6vw, 68px);
}

.page-about .about-history::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line), transparent);
}

.page-about .about-rail {
  list-style: none;
  margin: clamp(28px, 5vw, 52px) 0 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: clamp(30px, 5vw, 54px);
}

.page-about .about-rail::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 11px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, rgba(47, 230, 200, .9), rgba(53, 167, 255, .55), rgba(255, 201, 77, .6));
}

.page-about .about-rail__item {
  position: relative;
  padding-left: 42px;
}

.page-about .about-rail__node {
  position: absolute;
  left: 4px;
  top: 26px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--deep);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 5px rgba(47, 230, 200, .12), 0 0 18px rgba(47, 230, 200, .45);
}

.page-about .about-rail__node--gold {
  border-color: var(--gold);
  box-shadow: 0 0 0 6px rgba(255, 201, 77, .14), 0 0 22px rgba(255, 201, 77, .5);
}

.page-about .about-rail__panel {
  padding: clamp(20px, 3vw, 30px);
  border-radius: var(--radius-m);
  background:
    radial-gradient(140% 120% at 100% 0%, rgba(53, 167, 255, .10), transparent 58%),
    linear-gradient(160deg, rgba(18, 48, 78, .94), rgba(14, 39, 64, .94));
  border: 1px solid var(--line);
  box-shadow: var(--shadow-panel);
}

.page-about .about-rail__panel .panel__index {
  margin: 0;
}

.page-about .about-rail__panel .panel__title {
  margin: .45em 0 .6em;
  font-size: clamp(19px, 3.4vw, 25px);
  line-height: 1.35;
}

.page-about .about-rail__panel .panel__body {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--mist-dim);
}

.page-about .about-rail__points {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-about .about-rail__points li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-rail__points li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: .68em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px rgba(47, 230, 200, .6);
}

@media (min-width: 960px) {
  .page-about .about-rail {
    grid-template-columns: 1fr 1fr;
    column-gap: 72px;
    row-gap: clamp(46px, 6vw, 74px);
  }

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

  .page-about .about-rail__item {
    padding-left: 0;
  }

  .page-about .about-rail__item:nth-child(odd) {
    grid-column: 1;
  }

  .page-about .about-rail__item:nth-child(even) {
    grid-column: 2;
  }

  .page-about .about-rail__item:nth-child(odd) .about-rail__node {
    left: auto;
    right: -44px;
  }

  .page-about .about-rail__item:nth-child(even) .about-rail__node {
    left: -44px;
    right: auto;
    top: 34px;
  }

  .page-about .about-rail__item:nth-child(odd) .about-rail__node {
    top: 34px;
  }
}

/* ---------- 团队分工 ---------- */

.page-about .about-team {
  padding-block: clamp(34px, 6vw, 68px);
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
  margin-top: clamp(24px, 4vw, 40px);
}

@media (min-width: 1000px) {
  .page-about .about-team__grid {
    grid-template-columns: 1.24fr .76fr;
  }
}

.page-about .about-team__seg .seg__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 6px;
  margin: 0 0 20px;
  border-radius: 999px;
  background: rgba(18, 48, 78, .82);
  border: 1px solid var(--line);
}

.page-about .about-team__seg .seg__btn {
  flex: 1 1 96px;
  min-width: 96px;
  padding: 10px 16px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--mist-dim);
  font-family: var(--font-head);
  font-size: 14.5px;
  line-height: 1.2;
  cursor: pointer;
  transition: background .25s ease, color .25s ease, box-shadow .25s ease;
}

.page-about .about-team__seg .seg__btn:hover {
  color: var(--mist);
}

.page-about .about-team__seg .seg__btn[aria-selected="true"] {
  background: var(--cyan);
  color: #04241f;
  font-weight: 700;
  box-shadow: 0 8px 22px -12px rgba(47, 230, 200, .9);
}

.page-about .about-team__seg .seg__btn:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

.page-about .about-team__seg .seg__panel {
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  border-radius: var(--radius-m);
  background: linear-gradient(160deg, rgba(18, 48, 78, .92), rgba(14, 39, 64, .92));
  animation: about-panel-in .32s ease both;
}

.page-about .about-team__seg .seg__panel[hidden] {
  display: none;
}

.page-about .about-team__seg .seg__panel h3 {
  margin: 0 0 .6em;
  font-size: clamp(18px, 3.2vw, 23px);
  line-height: 1.4;
}

.page-about .about-team__seg .seg__panel p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--mist-dim);
}

.page-about .about-team__list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-about .about-team__list li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-team__list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: .68em;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--blue);
  box-shadow: 0 0 10px rgba(53, 167, 255, .6);
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  border-radius: var(--radius-l);
  border: 1px solid var(--line);
}

.page-about .about-team__figure .figure__caption {
  margin-top: 14px;
}

@keyframes about-panel-in {
  from {
    opacity: 0;
    transform: translateX(14px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* ---------- 场馆信息库 ---------- */

.page-about .about-venue {
  padding-block: clamp(34px, 6vw, 68px);
}

.page-about .about-venue__grid {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  align-items: center;
}

@media (min-width: 900px) {
  .page-about .about-venue__grid {
    grid-template-columns: .92fr 1.08fr;
  }
}

.page-about .about-venue__figure img {
  display: block;
  width: 100%;
  border-radius: var(--radius-l);
  border: 1px solid var(--line);
  background: linear-gradient(150deg, rgba(53, 167, 255, .14), rgba(11, 30, 51, .2));
}

.page-about .about-venue__figure .figure__caption {
  margin-top: 14px;
}

.page-about .about-venue__copy .section-title {
  margin: .3em 0 .7em;
}

.page-about .about-venue__copy > p {
  margin: 0;
  max-width: 48ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--mist-dim);
}

.page-about .about-fields {
  margin: clamp(22px, 3vw, 30px) 0 0;
  display: grid;
  gap: 10px;
}

.page-about .about-fields__row {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 12px 14px;
  border-radius: var(--radius-s);
  background: rgba(18, 48, 78, .62);
  border: 1px solid var(--line-soft);
}

.page-about .about-fields__row dt {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-about .about-fields__row dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--mist);
}

@media (min-width: 560px) {
  .page-about .about-fields__row {
    grid-template-columns: 104px minmax(0, 1fr);
  }
}

/* ---------- 品牌认证与三端 ---------- */

.page-about .about-cert {
  padding-block: clamp(28px, 5vw, 56px);
}

.page-about .about-cert__panel {
  padding: clamp(26px, 4vw, 48px);
  border-radius: var(--radius-l);
}

.page-about .about-cert__panel .panel__title {
  margin: .4em 0 .7em;
  font-size: clamp(21px, 3.8vw, 30px);
  line-height: 1.32;
}

.page-about .about-cert__panel .panel__body {
  margin: 0;
  max-width: 62ch;
  line-height: 1.85;
}

.page-about .about-devices {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.page-about .about-devices__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px;
  border-radius: var(--radius-s);
  background: #ffffff;
  border: 1px solid rgba(11, 30, 51, .10);
  border-top: 3px solid var(--blue);
}

.page-about .about-devices__item:nth-child(2) {
  border-top-color: var(--cyan);
}

.page-about .about-devices__item:nth-child(3) {
  border-top-color: var(--coral);
}

.page-about .about-devices__name {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .1em;
  color: var(--ink);
}

.page-about .about-devices__desc {
  font-size: 14px;
  line-height: 1.7;
  color: #3d5670;
}

/* ---------- 黑龙江本地服务节点 ---------- */

.page-about .about-node {
  padding-block: clamp(28px, 5vw, 56px);
}

.page-about .about-node__inner {
  display: grid;
  gap: clamp(22px, 4vw, 42px);
  align-items: center;
  padding: clamp(26px, 4vw, 48px);
  border-radius: var(--radius-l);
  border: 1px solid var(--line);
  background:
    radial-gradient(120% 150% at 88% 6%, rgba(47, 230, 200, .22), transparent 56%),
    linear-gradient(140deg, var(--panel) 0%, var(--deep) 72%);
}

.page-about .about-node__copy > p {
  margin: 0;
  max-width: 52ch;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--mist-dim);
}

.page-about .about-node__figure {
  text-align: left;
}

.page-about .about-node__delta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(58px, 13vw, 104px);
  line-height: .88;
  letter-spacing: -.02em;
  color: var(--gold);
  text-shadow: 0 0 36px rgba(255, 201, 77, .32);
}

.page-about .about-node__deltaKey {
  margin: 12px 0 0;
  font-size: 13px;
  letter-spacing: .08em;
  line-height: 1.6;
  color: var(--slate);
}

@media (min-width: 860px) {
  .page-about .about-node__inner {
    grid-template-columns: 1.35fr .65fr;
  }

  .page-about .about-node__figure {
    text-align: right;
  }
}

/* ---------- 行业参与与合作 ---------- */

.page-about .about-eco {
  padding-block: clamp(34px, 6vw, 68px);
}

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

.page-about .about-eco__card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(20px, 3vw, 28px);
  border-radius: var(--radius-m);
  border: 1px solid var(--line);
  background: linear-gradient(165deg, rgba(18, 48, 78, .72), rgba(14, 39, 64, .72));
  box-shadow: var(--shadow-panel);
}

.page-about .about-eco__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(30px, 5vw, 42px);
  line-height: 1;
  letter-spacing: -.01em;
  color: var(--cyan);
}

.page-about .about-eco__card:nth-child(2) .about-eco__num {
  color: var(--gold);
}

.page-about .about-eco__card:nth-child(3) .about-eco__num {
  color: var(--blue);
}

.page-about .about-eco__title {
  margin: 0;
  font-size: clamp(16px, 2.6vw, 19px);
  line-height: 1.45;
}

.page-about .about-eco__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--mist-dim);
}

.page-about .about-eco__link {
  margin-top: auto;
  padding-top: 8px;
  font-size: 14px;
  font-weight: 700;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 230, 200, .38);
  align-self: flex-start;
  transition: color .2s ease, border-color .2s ease;
}

.page-about .about-eco__link:hover,
.page-about .about-eco__link:focus-visible {
  color: var(--gold);
  border-bottom-color: rgba(255, 201, 77, .6);
}

/* ---------- 收尾 ---------- */

.page-about .about-next {
  padding-block: clamp(28px, 5vw, 56px) 0;
}

.page-about .about-next__inner {
  padding: clamp(26px, 4vw, 44px);
  border-radius: var(--radius-l);
  border: 1px dashed var(--line-soft);
  background: rgba(18, 48, 78, .38);
}

.page-about .about-next__title {
  margin: 0 0 .6em;
  font-size: clamp(20px, 3.6vw, 28px);
  line-height: 1.35;
}

.page-about .about-next__text {
  margin: 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--mist-dim);
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(18px, 3vw, 26px);
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team__seg .seg__panel {
    animation: none;
  }
}