.page-about {
  --about-line: rgba(43, 59, 54, 0.26);
  --about-gold-soft: rgba(201, 161, 90, 0.16);
  --about-body: #1D2E29;
  background: var(--paper);
  color: var(--ink-900);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding-top: clamp(14px, 2.4vw, 26px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(34px, 5.5vw, 70px) 0 clamp(28px, 4.5vw, 52px);
}

.page-about .about-hero__kicker {
  margin: 0 0 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--moss);
}

.page-about .about-hero__title {
  margin: 0 0 24px;
  max-width: 16em;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(31px, 6.2vw, 62px);
  line-height: 1.16;
  letter-spacing: 0.01em;
  color: var(--ink-900);
}

.page-about .about-hero__lede {
  margin: 0 0 clamp(30px, 4vw, 44px);
  max-width: 34em;
  font-family: var(--font-body);
  font-size: clamp(16px, 1.9vw, 18px);
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .about-facts {
  list-style: none;
  margin: 0;
  padding: clamp(20px, 3vw, 30px) 0 0;
  border-top: 1px solid var(--about-line);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 18px;
}

.page-about .about-facts__num {
  display: block;
  font-family: var(--font-speed);
  font-weight: 600;
  font-size: clamp(28px, 5vw, 46px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--ink-900);
}

.page-about .about-facts__label {
  display: block;
  margin-top: 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--rock);
}

/* ---------- 通栏横幅 ---------- */
.page-about .about-banner {
  margin: 0;
  padding: 0;
}

.page-about .about-banner img {
  display: block;
  width: 100%;
  height: clamp(190px, 32vw, 400px);
  object-fit: cover;
  max-width: 100%;
}

.page-about .about-banner__cap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 12px clamp(18px, 4vw, 48px) 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--rock);
}

/* ---------- 纵向档案轨 ---------- */
.page-about .about-track {
  padding-top: clamp(46px, 6.5vw, 92px);
  padding-bottom: clamp(20px, 3vw, 40px);
}

.page-about .about-entry {
  position: relative;
  padding-left: 40px;
  padding-bottom: clamp(46px, 6.5vw, 86px);
}

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

.page-about .about-entry::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 16px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--about-line), rgba(43, 59, 54, 0.05));
}

.page-about .about-entry:last-child::before {
  display: none;
}

.page-about .about-entry__dot {
  position: absolute;
  left: 3px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 5px var(--about-gold-soft);
}

.page-about .about-entry__dot--rust {
  background: var(--rust);
  animation: about-node-pulse 2.6s ease-in-out infinite;
}

@keyframes about-node-pulse {
  0%,
  100% {
    box-shadow: 0 0 0 5px rgba(163, 78, 44, 0.18);
  }
  50% {
    box-shadow: 0 0 0 11px rgba(163, 78, 44, 0.04);
  }
}

.page-about .about-entry__year {
  display: block;
  margin: 0 0 12px;
  font-family: var(--font-speed);
  font-weight: 600;
  font-size: 19px;
  letter-spacing: 0.05em;
  color: var(--gold);
  text-decoration: none;
  transition: color 180ms ease;
}

.page-about .about-entry__year:hover,
.page-about .about-entry__year:focus-visible {
  color: var(--rust);
}

.page-about .about-entry__tag {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--moss);
}

.page-about .about-entry__title {
  margin: 0 0 20px;
  max-width: 20em;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(22px, 3.6vw, 33px);
  line-height: 1.32;
  color: var(--ink-900);
}

.page-about .about-entry__body p {
  margin: 0 0 16px;
  max-width: 34em;
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.88;
  color: var(--about-body);
}

.page-about .about-entry__body a {
  color: var(--ink-700);
  text-decoration: underline;
  text-decoration-color: var(--gold);
  text-underline-offset: 4px;
}

.page-about .about-entry__body a:hover {
  color: var(--rust);
}

/* ---------- 指标行 ---------- */
.page-about .about-metrics {
  list-style: none;
  margin: 28px 0 0;
  padding: 24px 0 0;
  border-top: 1px solid var(--about-line);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(128px, 1fr));
  gap: 22px 18px;
}

.page-about .about-metrics__num {
  display: block;
  font-family: var(--font-speed);
  font-weight: 600;
  font-size: clamp(26px, 3.6vw, 38px);
  line-height: 1;
  color: var(--gold);
}

.page-about .about-metrics__label {
  display: block;
  margin-top: 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--rock);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  margin-top: 30px;
  display: grid;
  gap: 26px;
}

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

.page-about .about-team__ring svg {
  display: block;
  width: 100%;
  max-width: 236px;
  height: auto;
  margin-inline: auto;
}

.page-about .ring-seg--data {
  stroke: var(--ice);
}

.page-about .ring-seg--edit {
  stroke: var(--gold);
}

.page-about .ring-seg--ops {
  stroke: var(--moss);
}

.page-about .ring-seg {
  transition: opacity 180ms ease;
}

.page-about .about-team__ring:hover .ring-seg {
  opacity: 0.32;
}

.page-about .about-team__ring .ring-seg:hover {
  opacity: 1;
}

.page-about .ring-center-num {
  font-family: var(--font-speed);
  font-size: 34px;
  font-weight: 600;
  fill: var(--ink-900);
}

.page-about .ring-center-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  fill: var(--rock);
}

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

.page-about .about-team__legend li {
  display: grid;
  grid-template-columns: 10px minmax(0, 1fr);
  gap: 13px;
  align-items: start;
}

.page-about .about-team__legend .dot {
  width: 10px;
  height: 10px;
  margin-top: 7px;
  border-radius: 50%;
}

.page-about .about-team__legend li:nth-child(1) .dot {
  background: var(--ice);
}

.page-about .about-team__legend li:nth-child(2) .dot {
  background: var(--gold);
}

.page-about .about-team__legend li:nth-child(3) .dot {
  background: var(--moss);
}

.page-about .about-team__legend b {
  display: block;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 600;
  color: var(--ink-900);
}

.page-about .about-team__legend p {
  margin: 6px 0 0;
  max-width: 30em;
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--rock);
}

.page-about .about-team__photo {
  margin: 32px 0 0;
}

.page-about .about-team__photo img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: clamp(190px, 30vw, 320px);
  object-fit: cover;
  border-radius: var(--r-l);
}

.page-about .about-team__photo figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--rock);
}

/* ---------- 版本分段 ---------- */
.page-about .about-tabs {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin: 30px 0 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-tabs .tab {
  appearance: none;
  border: 0;
  background: transparent;
  padding: 12px 15px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--rock);
  cursor: pointer;
  border-radius: var(--r-s) var(--r-s) 0 0;
  transition: color 180ms ease, background-color 180ms ease;
}

.page-about .about-tabs .tab:hover {
  color: var(--ink-900);
}

.page-about .about-tabs .tab[aria-selected="true"] {
  color: var(--ink-900);
  background: var(--gold-pale);
}

.page-about .about-tabs .tab:focus-visible {
  outline: 2px solid var(--ice);
  outline-offset: -2px;
}

.page-about .about-tabs .tabs__underline {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 0;
  height: 2px;
  background: var(--gold);
  transition: width 220ms ease, transform 220ms ease;
}

.page-about .about-tabs__panel {
  padding: 26px 0 0;
}

.page-about .about-version__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(18px, 2.4vw, 22px);
  line-height: 1.4;
  color: var(--ink-900);
}

.page-about .about-versions__figure {
  margin: 34px 0 0;
}

.page-about .about-versions__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--r-m);
}

.page-about .about-versions__figure figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--rock);
}

/* ---------- 荣誉 ---------- */
.page-about .about-honors {
  margin: 28px 0 0;
  padding: clamp(22px, 3vw, 30px) clamp(18px, 3vw, 32px);
  background: linear-gradient(135deg, rgba(235, 217, 180, 0.68), rgba(235, 217, 180, 0.26));
  border: 1px solid rgba(201, 161, 90, 0.46);
  border-radius: var(--r-l);
}

.page-about .about-honors__label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--moss);
}

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

.page-about .about-honors__list li {
  position: relative;
  padding-left: 22px;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink-900);
}

.page-about .about-honors__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 10px;
  height: 1px;
  background: var(--gold);
}

.page-about .about-honors__note {
  margin-top: 18px;
  font-size: 15px;
}

/* ---------- 线下 ---------- */
.page-about .about-offline {
  list-style: none;
  margin: 26px 0 22px;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--about-line);
  border-radius: var(--r-m);
  overflow: hidden;
}

.page-about .about-offline li {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  align-items: center;
  gap: 16px;
  padding: 16px 18px;
  background: var(--paper-warm);
}

.page-about .about-offline__num {
  font-family: var(--font-speed);
  font-weight: 600;
  font-size: 22px;
  letter-spacing: 0.02em;
  color: var(--rust);
}

.page-about .about-offline__text {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.65;
  color: var(--about-body);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  margin: clamp(40px, 6vw, 80px) 0 clamp(30px, 5vw, 60px);
  padding: clamp(28px, 5vw, 58px) clamp(22px, 4vw, 56px);
  background: var(--ink-900);
  border-radius: var(--r-l);
  position: relative;
  overflow: hidden;
}

.page-about .about-next::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -70px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(201, 161, 90, 0.26), rgba(201, 161, 90, 0) 68%);
  pointer-events: none;
}

.page-about .about-next__kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-about .about-next__title {
  margin: 0 0 18px;
  max-width: 16em;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 4vw, 38px);
  line-height: 1.3;
  color: var(--paper);
}

.page-about .about-next__text {
  margin: 0 0 28px;
  max-width: 34em;
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.85;
  color: rgba(244, 241, 233, 0.82);
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  position: relative;
  z-index: 1;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 26px 22px;
  }
}

@media (min-width: 780px) {
  .page-about .about-team {
    grid-template-columns: minmax(180px, 244px) minmax(0, 1fr);
    align-items: center;
    gap: 42px;
  }

  .page-about .about-team__ring svg {
    margin-inline: 0;
  }
}

@media (min-width: 960px) {
  .page-about .about-entry {
    padding-left: 200px;
    padding-bottom: clamp(64px, 6vw, 104px);
  }

  .page-about .about-entry::before {
    left: 120px;
    top: 18px;
  }

  .page-about .about-entry__dot {
    left: 114px;
    top: 8px;
  }

  .page-about .about-entry__year {
    position: absolute;
    left: 0;
    top: 0;
    width: 96px;
    margin: 0;
    text-align: right;
    font-size: 25px;
    line-height: 1.2;
  }

  .page-about .about-entry__title {
    margin-bottom: 22px;
  }

  .page-about .about-banner img {
    height: clamp(280px, 30vw, 430px);
  }
}

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

  .page-about .about-tabs .tabs__underline,
  .page-about .about-tabs .tab,
  .page-about .about-entry__year,
  .page-about .ring-seg {
    transition: none;
  }
}
<<<END>>>