.page-about {
  --about-track: 26px;
  --about-orb-sm: 84px;
  --about-orb-md: 104px;
  --about-orb-lg: 132px;
  background: var(--night);
  color: var(--text);
  overflow-x: hidden;
}

.page-about .breadcrumb {
  padding-top: clamp(18px, 2.5vw, 30px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(30px, 5vw, 66px) 0 clamp(38px, 6vw, 76px);
  background:
    radial-gradient(120% 92% at 84% 4%, rgba(46, 123, 214, .30), transparent 62%),
    radial-gradient(86% 64% at 6% 96%, rgba(53, 196, 181, .14), transparent 64%),
    linear-gradient(180deg, var(--night) 0%, var(--night-2) 100%);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -24% -12%;
  background: linear-gradient(104deg, transparent 38%, rgba(53, 196, 181, .10) 46%, rgba(214, 34, 60, .10) 53%, transparent 61%);
  transform: rotate(-6deg);
  pointer-events: none;
  animation: about-aurora 40s linear infinite alternate;
}

@keyframes about-aurora {
  from { transform: rotate(-6deg) translate3d(-2%, 0, 0); }
  to { transform: rotate(-6deg) translate3d(2%, 0, 0); }
}

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

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 4.5vw, 58px);
  align-items: center;
}

@media (min-width: 980px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  }
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-size: clamp(30px, 3.6vw + 12px, 56px);
  line-height: 1.14;
  letter-spacing: -.01em;
  font-weight: 700;
}

.page-about .about-hero__lead {
  margin: 20px 0 0;
  max-width: 32em;
  font-size: var(--fs-base);
  line-height: 1.78;
  color: var(--text-dim);
}

.page-about .about-hero__aside {
  margin: 14px 0 0;
  max-width: 32em;
  font-size: var(--fs-sm);
  line-height: 1.75;
  color: var(--text-mute);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: clamp(28px, 3.5vw, 40px);
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.page-about .about-stat {
  display: grid;
  gap: 4px;
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1;
  color: var(--text);
  letter-spacing: .02em;
}

.page-about .about-stat__label {
  font-size: var(--fs-xs);
  color: var(--text-mute);
  letter-spacing: .06em;
}

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

.page-about .panel-art {
  display: grid;
  gap: 14px;
  padding: clamp(18px, 2.2vw, 28px);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-lg);
  background: linear-gradient(158deg, rgba(14, 44, 74, .88), rgba(6, 22, 38, .74));
  box-shadow: var(--shadow-float);
}

.page-about .panel-art__row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px 15px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(6, 22, 38, .52);
}

.page-about .panel-art__row--accent {
  border-color: rgba(214, 34, 60, .44);
  box-shadow: inset 0 0 0 1px rgba(214, 34, 60, .12);
}

.page-about .panel-art__label {
  font-size: var(--fs-xs);
  letter-spacing: .12em;
  color: var(--text-dim);
  white-space: nowrap;
}

.page-about .panel-art__bars {
  display: flex;
  gap: 6px;
  margin-left: auto;
}

.page-about .panel-art__bars i {
  display: block;
  width: 13px;
  height: 22px;
  border-radius: 3px;
  background: linear-gradient(180deg, rgba(46, 123, 214, .88), rgba(46, 123, 214, .30));
}

.page-about .panel-art__line {
  flex: 1;
  height: 3px;
  margin-left: auto;
  border-radius: 2px;
  background: linear-gradient(90deg, rgba(214, 34, 60, .18), var(--red) 62%, rgba(214, 34, 60, .3));
}

/* ---------- 通用区块 ---------- */
.page-about .about-block {
  padding: clamp(52px, 7.5vw, 94px) 0;
}

.page-about .about-why__more {
  margin: 26px 0 0;
}

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

.page-about .about-band {
  margin-top: clamp(32px, 4.5vw, 56px);
  aspect-ratio: 7 / 4;
  border-radius: var(--r-lg);
}

/* ---------- 章节跳转 ---------- */
.page-about .about-jump {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(10, 31, 51, .72);
}

.page-about .about-jump__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 24px;
  padding: 14px 0;
}

.page-about .about-jump__hint {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: .22em;
  color: var(--text-mute);
}

.page-about .about-jump__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-jump__list a {
  display: inline-block;
  padding-bottom: 2px;
  font-size: var(--fs-sm);
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t), border-color var(--t);
}

.page-about .about-jump__list a:hover,
.page-about .about-jump__list a:focus-visible {
  color: var(--text);
  border-color: var(--blue);
}

/* ---------- 一页式取舍 ---------- */
.page-about .about-why {
  margin-top: clamp(26px, 4vw, 46px);
  border-top: 1px solid var(--line);
}

.page-about .about-why__item {
  display: grid;
  gap: 10px;
  padding: clamp(22px, 3vw, 34px) 0;
  border-bottom: 1px solid var(--line);
}

@media (min-width: 880px) {
  .page-about .about-why__item {
    grid-template-columns: 76px minmax(0, .92fr) minmax(0, 1.2fr);
    gap: 28px;
    align-items: start;
  }
}

.page-about .about-why__num {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  letter-spacing: .16em;
  color: var(--blue-soft);
}

.page-about .about-why__title {
  margin: 0;
  font-size: var(--fs-md);
  line-height: 1.42;
  font-weight: 600;
}

.page-about .about-why__text {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 版本时间轴 ---------- */
.page-about .about-timeline {
  background: linear-gradient(180deg, var(--night-2), var(--deep));
}

.page-about .about-timeline__band {
  margin: clamp(26px, 4vw, 44px) 0 0;
  aspect-ratio: 16 / 5;
  border-radius: var(--r-md);
  opacity: .78;
}

.page-about .about-timeline__segment {
  display: grid;
  gap: clamp(24px, 3.2vw, 44px);
  margin-top: clamp(30px, 4vw, 52px);
}

@media (min-width: 960px) {
  .page-about .about-timeline__segment {
    grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
    align-items: start;
  }
}

.page-about .segment.about-timeline__track {
  position: relative;
  display: flex;
  flex-direction: column;
  flex-wrap: nowrap;
  gap: 10px;
  padding-left: var(--about-track);
  border-left: 1px solid var(--line-strong);
  overflow: visible;
}

.page-about .about-node {
  position: relative;
  display: grid;
  gap: 3px;
  width: 100%;
  padding: 14px 16px;
  text-align: left;
  font: inherit;
  color: var(--text-dim);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(10, 31, 51, .58);
  cursor: pointer;
  transition: color var(--t), border-color var(--t), background var(--t), box-shadow var(--t);
}

.page-about .about-node:hover {
  color: var(--text);
  border-color: var(--line-strong);
}

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

.page-about .about-node__dot {
  position: absolute;
  left: calc(var(--about-track) * -1 - 7px);
  top: 22px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--night);
  border: 1px solid var(--line-strong);
  transition: background var(--t), border-color var(--t), box-shadow var(--t);
}

.page-about .about-node__label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: .18em;
  color: var(--text-mute);
}

.page-about .about-node__title {
  font-size: var(--fs-sm);
  line-height: 1.5;
  font-weight: 600;
}

.page-about .about-node[aria-selected="true"] {
  color: var(--text);
  border-color: rgba(53, 196, 181, .55);
  background: linear-gradient(140deg, rgba(53, 196, 181, .14), rgba(14, 44, 74, .74));
  box-shadow: var(--shadow-soft);
}

.page-about .about-node[aria-selected="true"] .about-node__dot {
  background: var(--cyan);
  border-color: var(--cyan);
  box-shadow: 0 0 0 5px rgba(53, 196, 181, .16), 0 0 18px rgba(53, 196, 181, .6);
}

.page-about .about-node[aria-selected="true"] .about-node__label {
  color: var(--cyan);
}

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

.page-about .about-version {
  padding: clamp(22px, 3vw, 36px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--glass);
  box-shadow: var(--shadow-soft);
}

.page-about .about-version__tag {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: .2em;
  color: var(--cyan);
}

.page-about .about-version__title {
  margin: 10px 0 0;
  font-size: clamp(20px, 1.6vw + 14px, 30px);
  line-height: 1.34;
  font-weight: 600;
}

.page-about .about-version__text {
  margin: 14px 0 0;
  font-size: var(--fs-sm);
  line-height: 1.82;
  color: var(--text-dim);
}

.page-about .about-version__list {
  display: grid;
  gap: 10px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-version__list li {
  position: relative;
  padding-left: 20px;
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .about-version__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--blue-soft);
}

.page-about .about-version .link-more {
  display: inline-block;
  margin-top: 20px;
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 4.5vw, 56px);
  align-items: start;
}

@media (min-width: 940px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
  }
}

.page-about .about-team__media {
  margin: clamp(24px, 3vw, 36px) 0 0;
  aspect-ratio: 10 / 7;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-orbs {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-orb {
  --orb: var(--about-orb-sm);
  display: grid;
  grid-template-columns: min(var(--orb), 24vw) minmax(0, 1fr);
  gap: clamp(16px, 2.4vw, 28px);
  align-items: start;
  padding: clamp(20px, 2.6vw, 30px) 0;
  border-bottom: 1px solid var(--line);
  outline: none;
}

.page-about .about-orb--lg { --orb: var(--about-orb-lg); }
.page-about .about-orb--md { --orb: var(--about-orb-md); }

.page-about .about-orb__dot {
  display: block;
  width: min(var(--orb), 24vw);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  background:
    radial-gradient(circle at 32% 28%, rgba(143, 192, 240, .42), rgba(46, 123, 214, .16) 56%, rgba(6, 22, 38, .26) 100%);
  box-shadow: inset 0 0 34px -12px rgba(46, 123, 214, .8);
  transition: box-shadow var(--t), border-color var(--t);
}

.page-about .about-orb:hover .about-orb__dot,
.page-about .about-orb:focus-visible .about-orb__dot,
.page-about .about-orb:focus-within .about-orb__dot {
  border-color: rgba(53, 196, 181, .62);
  box-shadow: inset 0 0 34px -8px rgba(53, 196, 181, .75), 0 0 24px -6px rgba(53, 196, 181, .5);
}

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

.page-about .about-orb__title {
  margin: 0;
  font-size: var(--fs-md);
  font-weight: 600;
  line-height: 1.4;
}

.page-about .about-orb__desc {
  margin: 8px 0 0;
  font-size: var(--fs-sm);
  line-height: 1.78;
  color: var(--text-dim);
}

.page-about .about-orb__list {
  display: grid;
  gap: 6px;
  max-height: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  overflow: hidden;
  transition: max-height var(--t), margin var(--t), opacity var(--t);
  opacity: 0;
}

.page-about .about-orb:hover .about-orb__list,
.page-about .about-orb:focus-within .about-orb__list,
.page-about .about-orb:focus-visible .about-orb__list {
  max-height: 14em;
  margin-top: 12px;
  opacity: 1;
}

.page-about .about-orb__list li {
  position: relative;
  padding-left: 16px;
  font-size: var(--fs-xs);
  line-height: 1.7;
  color: var(--text-mute);
}

.page-about .about-orb__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 6px;
  height: 1px;
  background: var(--blue-soft);
}

@media (max-width: 899px) {
  .page-about .about-orb__list {
    max-height: none;
    margin-top: 12px;
    opacity: 1;
  }
}

/* ---------- 兼容 ---------- */
.page-about .about-compat {
  background: linear-gradient(180deg, var(--snow) 0%, #E3EDF7 100%);
  color: var(--slate);
}

.page-about .about-compat .section__title {
  color: var(--night);
}

.page-about .about-compat .eyebrow {
  color: #1B6E63;
}

.page-about .about-compat__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 52px);
  align-items: center;
}

@media (min-width: 900px) {
  .page-about .about-compat__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  }
}

.page-about .about-compat__text {
  margin: 16px 0 0;
  max-width: 34em;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: var(--slate);
}

.page-about .about-compat .link-more {
  display: inline-block;
  margin-top: 22px;
  color: #1B4E86;
}

.page-about .about-matrix__wrap {
  padding: clamp(20px, 2.6vw, 30px);
  border: 1px solid rgba(75, 95, 114, .22);
  border-radius: var(--r-lg);
  background: rgba(255, 255, 255, .68);
  box-shadow: 0 20px 46px -34px rgba(6, 22, 38, .6);
}

.page-about .about-matrix {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(16px, 1fr));
  gap: 6px;
}

.page-about .about-matrix i {
  display: block;
  aspect-ratio: 1 / 1;
  border-radius: 3px;
  background: rgba(46, 123, 214, .26);
  border: 1px solid rgba(46, 123, 214, .34);
}

.page-about .about-matrix i:nth-child(3n) { background: rgba(46, 123, 214, .42); }
.page-about .about-matrix i:nth-child(7n) { background: rgba(53, 196, 181, .34); border-color: rgba(53, 196, 181, .46); }
.page-about .about-matrix i:nth-child(11n) { background: rgba(14, 44, 74, .5); border-color: rgba(14, 44, 74, .6); }

.page-about .about-matrix__note {
  margin: 18px 0 0;
  font-size: var(--fs-xs);
  line-height: 1.7;
  color: var(--slate);
}

.page-about .about-matrix__num {
  font-family: var(--font-mono);
  font-size: var(--fs-md);
  color: var(--night);
  margin-right: .1em;
}

/* ---------- 归属与服务 ---------- */
.page-about .about-region {
  background: linear-gradient(180deg, var(--deep), var(--night));
}

.page-about .about-region__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 54px);
  align-items: start;
}

@media (min-width: 940px) {
  .page-about .about-region__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
  }
}

.page-about .about-region__copy p {
  margin: 16px 0 0;
  max-width: 34em;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: var(--text-dim);
}

.page-about .about-region__copy a {
  color: var(--blue-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(143, 192, 240, .45);
  transition: color var(--t), border-color var(--t);
}

.page-about .about-region__copy a:hover {
  color: var(--text);
  border-color: var(--text);
}

.page-about .about-region__card {
  padding: clamp(22px, 2.6vw, 32px);
  border-radius: var(--r-lg);
  background: var(--glass);
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow-float);
}

.page-about .about-region__card-title {
  margin: 0 0 18px;
  font-size: var(--fs-md);
  font-weight: 600;
}

.page-about .about-region__dl {
  margin: 0;
  display: grid;
  gap: 4px;
}

.page-about .about-region__dl dt {
  font-size: var(--fs-xs);
  letter-spacing: .12em;
  color: var(--text-mute);
  margin-top: 14px;
}

.page-about .about-region__dl dt:first-child {
  margin-top: 0;
}

.page-about .about-region__dl dd {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.65;
  color: var(--text);
  word-break: break-word;
}

.page-about .about-region__dl .mono {
  font-family: var(--font-mono);
  letter-spacing: .04em;
}

/* ---------- 收尾 ---------- */
.page-about .about-next {
  padding: clamp(44px, 6vw, 74px) 0 clamp(56px, 7vw, 96px);
  border-top: 1px solid var(--line);
}

.page-about .about-next__inner {
  display: grid;
  gap: 22px;
}

@media (min-width: 860px) {
  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 40px;
  }
}

.page-about .about-next__lead {
  margin: 0;
  max-width: 30em;
  font-size: var(--fs-base);
  line-height: 1.8;
  color: var(--text-dim);
}

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

@media (max-width: 480px) {
  .page-about .about-next__actions .btn {
    width: 100%;
    text-align: center;
  }
}
<<<END>>>
</main>