.page-about {
  --about-sec-y: clamp(56px, 8.5vw, 110px);
  --about-gap: clamp(20px, 3vw, 36px);
  --about-line: rgba(154, 168, 204, 0.24);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(34px, 6vw, 72px) 0 clamp(48px, 8vw, 100px);
  background:
    radial-gradient(120% 88% at 88% 2%, rgba(107, 63, 224, 0.5), transparent 58%),
    radial-gradient(90% 76% at 2% 98%, rgba(53, 227, 220, 0.16), transparent 62%),
    linear-gradient(180deg, #0A1130 0%, #101A44 68%, #0A1130 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--nx-violet), var(--nx-cyan), transparent);
  opacity: 0.6;
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(34px, 5vw, 60px);
  align-items: center;
}

.page-about .about-hero__title {
  margin: clamp(14px, 2vw, 22px) 0 clamp(16px, 2.2vw, 24px);
  max-width: 18ch;
}

.page-about .about-hero__lede {
  max-width: 56ch;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: clamp(24px, 3.2vw, 36px);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(32px, 4.4vw, 52px) 0 0;
  padding: 0;
  background: var(--about-line);
  border: 1px solid var(--about-line);
  border-radius: var(--nx-r-card);
  overflow: hidden;
}

.page-about .about-stats__item {
  padding: clamp(14px, 2vw, 20px) clamp(14px, 2vw, 22px);
  background: rgba(10, 17, 48, 0.72);
}

.page-about .about-stats dt {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--nx-slate);
}

.page-about .about-stats dd {
  margin: 6px 0 0;
  font-family: var(--nx-font-display);
  font-weight: 800;
  font-size: clamp(20px, 2.4vw, 26px);
  color: var(--nx-text);
}

.page-about .about-stats dd .nx-num {
  color: var(--nx-cyan);
  margin-right: 2px;
}

/* 首屏星轨视觉 */
.page-about .about-orbit {
  position: relative;
  width: min(100%, 460px);
  margin-inline: auto;
  aspect-ratio: 1 / 1;
}

.page-about .about-orbit::before {
  content: "";
  position: absolute;
  inset: 12%;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, rgba(107, 63, 224, 0.42), transparent 70%);
  filter: blur(6px);
}

.page-about .about-orbit__svg {
  position: relative;
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-orbit__ring {
  fill: none;
  stroke: rgba(147, 243, 240, 0.28);
  stroke-width: 1.4;
  transform-origin: 210px 210px;
}

.page-about .about-orbit__ring--spin {
  stroke: url(#aboutOrbitGrad);
  stroke-width: 2;
  stroke-dasharray: 46 30;
  animation: about-orbit-spin 26s linear infinite;
}

.page-about .about-orbit__ring--tilt {
  transform: rotate(-24deg);
  opacity: 0.7;
}

.page-about .about-orbit__ring--tilt-b {
  transform: rotate(-24deg);
  opacity: 0.45;
}

.page-about .about-orbit__core {
  filter: drop-shadow(0 0 18px rgba(107, 63, 224, 0.85));
}

.page-about .about-orbit__dot {
  animation: about-dot-pulse 4.2s ease-in-out infinite;
}

.page-about .about-orbit__dot--b { animation-delay: -1.4s; }
.page-about .about-orbit__dot--c { animation-delay: -2.8s; }

@keyframes about-orbit-spin {
  to { transform: rotate(360deg); }
}

@keyframes about-dot-pulse {
  0%, 100% { opacity: 0.45; }
  50% { opacity: 1; }
}

/* ---------- 起点 ---------- */
.page-about .about-start__title {
  max-width: 22ch;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-about .about-start__cols {
  display: grid;
  gap: clamp(20px, 3vw, 44px);
  margin-bottom: clamp(34px, 5vw, 60px);
}

.page-about .about-start__body p {
  margin: 0 0 1em;
  font-size: clamp(16px, 1.1vw, 17px);
  line-height: 1.8;
}

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

.page-about .about-figure {
  margin: clamp(30px, 4vw, 52px) 0 0;
}

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

.page-about .nx-figure__caption {
  margin-top: 12px;
}

/* ---------- CN 本地化 ---------- */
.page-about .about-cn {
  position: relative;
  overflow: hidden;
  padding: var(--about-sec-y) 0;
  background:
    radial-gradient(100% 80% at 100% 0%, rgba(53, 227, 220, 0.12), transparent 58%),
    linear-gradient(180deg, #0A1130, #0D1640 55%, #0A1130);
}

.page-about .about-cn__title {
  max-width: 24ch;
  margin-bottom: clamp(14px, 2vw, 20px);
}

.page-about .about-cn__lede {
  max-width: 62ch;
}

.page-about .about-cn__list {
  display: grid;
  gap: clamp(24px, 3.4vw, 40px);
  margin: clamp(32px, 4.6vw, 56px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-cn__item {
  position: relative;
  padding-top: 22px;
  border-top: 2px solid transparent;
}

.page-about .about-cn__item::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: 62px;
  height: 2px;
  background: var(--nx-glow-vc);
}

.page-about .about-cn__no {
  display: block;
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--nx-cyan);
  margin-bottom: 10px;
}

.page-about .about-cn__item .nx-h3 {
  margin: 0 0 10px;
}

.page-about .about-cn__item p {
  margin: 0;
  color: var(--nx-text-dim);
  line-height: 1.78;
}

.page-about .about-terms {
  margin-top: clamp(34px, 5vw, 60px);
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid var(--about-line);
  border-radius: var(--nx-r-card);
  background: rgba(19, 28, 69, 0.62);
}

.page-about .about-terms .nx-h3 {
  margin: 0 0 18px;
}

.page-about .about-terms__table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

.page-about .about-terms__table th,
.page-about .about-terms__table td {
  text-align: left;
  padding: 12px 10px;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-terms__table th {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--nx-slate);
  font-weight: 600;
}

.page-about .about-terms__table td:first-child {
  color: var(--nx-text-dim);
}

.page-about .about-terms__table td:last-child {
  color: var(--nx-cyan-soft);
  font-weight: 600;
}

.page-about .about-terms__table tr:last-child td {
  border-bottom: 0;
}

/* ---------- 成长节点 ---------- */
.page-about .about-growth__lede {
  max-width: 58ch;
}

.page-about .about-timeline {
  position: relative;
  margin: clamp(38px, 5.5vw, 68px) 0 0;
  padding: 0 0 0 34px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 14px;
  bottom: 14px;
  width: 2px;
  background: linear-gradient(180deg, var(--nx-violet), var(--nx-cyan) 62%, rgba(53, 227, 220, 0));
}

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

.page-about .about-timeline__item + .about-timeline__item {
  margin-top: clamp(14px, 1.8vw, 22px);
}

.page-about .about-timeline__item:nth-child(2) { margin-top: clamp(22px, 2.6vw, 34px); }
.page-about .about-timeline__item:nth-child(3) { margin-top: clamp(12px, 1.4vw, 18px); }
.page-about .about-timeline__item:nth-child(4) { margin-top: clamp(28px, 3.4vw, 46px); }
.page-about .about-timeline__item:nth-child(5) { margin-top: clamp(14px, 1.6vw, 22px); }

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 18px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--nx-deep);
  border: 2px solid var(--nx-cyan);
  box-shadow: 0 0 0 4px rgba(53, 227, 220, 0.12);
}

.page-about .about-node {
  border-radius: var(--nx-r-card);
  border: 1px solid var(--about-line);
  background: rgba(10, 17, 48, 0.6);
  transition: border-color 0.3s ease, background-color 0.3s ease;
}

.page-about .about-node[open] {
  border-color: var(--nx-line-strong);
  background: rgba(19, 28, 69, 0.78);
}

.page-about .about-node__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding: clamp(16px, 2vw, 22px) clamp(16px, 2.4vw, 26px);
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-node__head:focus-visible {
  outline: 2px solid var(--nx-cyan);
  outline-offset: 3px;
  border-radius: var(--nx-r-card);
}

.page-about .about-node__ver {
  padding: 4px 12px;
  border-radius: var(--nx-r-pill);
  font-size: 13px;
  font-weight: 700;
  color: var(--nx-deep);
  background: linear-gradient(100deg, var(--nx-cyan), var(--nx-cyan-soft));
}

.page-about .about-node__name {
  font-family: var(--nx-font-display);
  font-weight: 800;
  font-size: clamp(17px, 1.6vw, 20px);
  color: var(--nx-text);
  letter-spacing: -0.01em;
}

.page-about .about-node__mark {
  position: relative;
  margin-left: auto;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1px solid var(--nx-line-strong);
  flex: 0 0 auto;
}

.page-about .about-node__mark::before,
.page-about .about-node__mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 11px;
  height: 2px;
  background: var(--nx-cyan);
  transform: translate(-50%, -50%);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.page-about .about-node__mark::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.page-about .about-node[open] .about-node__mark::after {
  transform: translate(-50%, -50%) rotate(0deg);
  opacity: 0;
}

.page-about .about-node__body {
  padding: 0 clamp(16px, 2.4vw, 26px) clamp(18px, 2.4vw, 26px);
}

.page-about .about-node__body p {
  margin: 0;
  color: var(--nx-text-dim);
  line-height: 1.78;
}

/* ---------- 团队 ---------- */
.page-about .about-team__lede {
  max-width: 60ch;
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(30px, 4vw, 56px);
  align-items: center;
  margin-top: clamp(30px, 4vw, 52px);
}

.page-about .about-team__ring {
  width: min(100%, 340px);
  margin-inline: auto;
}

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

.page-about .about-ring__track {
  fill: none;
  stroke: rgba(18, 22, 42, 0.12);
  stroke-width: 24;
}

.page-about .about-ring__seg {
  fill: none;
  stroke-width: 22;
  transition: stroke-width 0.3s ease, opacity 0.3s ease;
}

.page-about .about-ring__seg--edit { stroke: var(--nx-violet); }
.page-about .about-ring__seg--data { stroke: var(--nx-cyan); }
.page-about .about-ring__seg--help { stroke: #2FA9B8; }
.page-about .about-ring__seg--design { stroke: var(--nx-slate); }

.page-about .about-ring__seg:hover {
  stroke-width: 32;
}

.page-about .about-ring__total {
  font-family: var(--nx-font-num);
  font-size: 34px;
  font-weight: 700;
  fill: var(--nx-ink);
}

.page-about .about-ring__unit {
  font-family: var(--nx-font-body);
  font-size: 13px;
  fill: var(--nx-paper-dim);
}

.page-about .about-team__lines {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
}

.page-about .about-team__line {
  display: grid;
  grid-template-columns: 14px 1fr auto;
  grid-template-areas:
    "dot name count"
    ". duty duty";
  align-items: center;
  gap: 6px 12px;
  padding: clamp(12px, 1.6vw, 16px) 0;
  border-bottom: 1px solid rgba(18, 22, 42, 0.12);
}

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

.page-about .about-team__dot {
  grid-area: dot;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--nx-violet);
}

.page-about .about-team__line--data .about-team__dot { background: var(--nx-cyan); }
.page-about .about-team__line--help .about-team__dot { background: #2FA9B8; }
.page-about .about-team__line--design .about-team__dot { background: var(--nx-slate); }

.page-about .about-team__name {
  grid-area: name;
  font-family: var(--nx-font-display);
  font-weight: 800;
  font-size: clamp(16px, 1.4vw, 18px);
  color: var(--nx-ink);
  letter-spacing: -0.01em;
}

.page-about .about-team__count {
  grid-area: count;
  font-size: 22px;
  font-weight: 700;
  color: var(--nx-ink);
}

.page-about .about-team__duty {
  grid-area: duty;
  font-size: 15px;
  line-height: 1.7;
  color: var(--nx-paper-dim);
}

/* ---------- 合作伙伴 ---------- */
.page-about .about-partners {
  position: relative;
  overflow: hidden;
  padding: var(--about-sec-y) 0;
  background:
    radial-gradient(90% 80% at 8% 4%, rgba(107, 63, 224, 0.28), transparent 60%),
    linear-gradient(180deg, #0A1130, #121B46 60%, #0A1130);
}

.page-about .about-partners__lede {
  max-width: 62ch;
}

.page-about .about-cloud {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: clamp(10px, 1.4vw, 18px);
  margin: clamp(30px, 4.2vw, 52px) 0;
}

.page-about .about-cloud__tag {
  display: inline-block;
  border-radius: var(--nx-r-pill);
  border: 1px solid var(--about-line);
  color: var(--nx-text-dim);
  line-height: 1.2;
  transition: transform 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

.page-about .about-cloud__tag:hover {
  transform: translateY(-3px);
  border-color: var(--nx-line-strong);
  color: var(--nx-cyan-soft);
}

.page-about .about-cloud__tag--sm {
  padding: 8px 18px;
  font-size: 14px;
}

.page-about .about-cloud__tag--md {
  padding: 11px 24px;
  font-size: 16px;
}

.page-about .about-cloud__tag--lg {
  padding: 14px 30px;
  font-size: clamp(17px, 1.6vw, 21px);
  font-weight: 700;
  font-family: var(--nx-font-display);
  color: var(--nx-text);
  border-color: var(--nx-line-strong);
  background: rgba(53, 227, 220, 0.08);
}

.page-about .about-partners__note {
  display: grid;
  gap: 18px;
  padding: clamp(20px, 2.8vw, 30px);
  border-radius: var(--nx-r-card);
  border: 1px solid var(--about-line);
  background: rgba(19, 28, 69, 0.6);
}

.page-about .about-partners__note p {
  margin: 0;
  color: var(--nx-text-dim);
  line-height: 1.78;
}

.page-about .about-partners__note .nx-num {
  color: var(--nx-cyan-soft);
  word-break: break-all;
}

.page-about .about-partners__note .nx-btn {
  justify-self: start;
}

/* ---------- 原则 ---------- */
.page-about .about-claim__list {
  display: grid;
  gap: 0;
  margin: clamp(28px, 4vw, 48px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-claim__item {
  padding: clamp(22px, 3vw, 32px) 0;
  border-top: 1px solid rgba(18, 22, 42, 0.14);
}

.page-about .about-claim__item:last-child {
  border-bottom: 1px solid rgba(18, 22, 42, 0.14);
}

.page-about .about-claim__item .nx-h3 {
  margin: 0 0 10px;
  color: var(--nx-ink);
}

.page-about .about-claim__item p {
  margin: 0;
  max-width: 68ch;
  color: var(--nx-paper-dim);
  line-height: 1.78;
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  position: relative;
  overflow: hidden;
  padding: clamp(52px, 8vw, 96px) 0;
  background:
    radial-gradient(70% 120% at 12% 20%, rgba(107, 63, 224, 0.4), transparent 62%),
    radial-gradient(70% 120% at 92% 90%, rgba(53, 227, 220, 0.2), transparent 60%),
    linear-gradient(140deg, #0A1130, #16205A 60%, #0A1130);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 16px;
  justify-items: start;
}

.page-about .about-cta__title {
  margin: 0;
  max-width: 26ch;
}

.page-about .about-cta__lede {
  max-width: 58ch;
  margin: 0;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-partners__note {
    grid-template-columns: 1fr auto;
    align-items: center;
  }
}

@media (min-width: 880px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

  .page-about .about-start__cols {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  }

  .page-about .about-claim__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(30px, 4vw, 60px);
  }

  .page-about .about-claim__item:nth-child(2) {
    border-top: 1px solid rgba(18, 22, 42, 0.14);
  }

  .page-about .about-claim__item:nth-child(odd) {
    padding-right: clamp(16px, 2vw, 28px);
  }
}

@media (min-width: 1080px) {
  .page-about .about-timeline {
    padding-left: 44px;
  }

  .page-about .about-timeline::before {
    left: 15px;
  }

  .page-about .about-timeline__item::before {
    left: -44px;
  }

  .page-about .about-node__body {
    padding-left: clamp(80px, 8vw, 120px);
  }
}

@media (max-width: 640px) {
  .page-about .about-hero__title,
  .page-about .about-start__title,
  .page-about .about-cn__title,
  .page-about .about-cta__title {
    max-width: none;
  }

  .page-about .about-terms__table th,
  .page-about .about-terms__table td {
    padding: 10px 6px;
    font-size: 14px;
  }

  .page-about .about-hero__actions .nx-btn,
  .page-about .about-cta__actions .nx-btn {
    width: 100%;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-orbit__ring--spin,
  .page-about .about-orbit__dot {
    animation: none;
  }

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