.page-about {
  --about-gap: clamp(48px, 7vw, 88px);
}

.page-about .about-crumbs {
  padding-top: clamp(18px, 3vw, 28px);
}

.page-about .eyebrow {
  margin: 0 0 10px;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding: clamp(32px, 5.6vw, 68px) 0 clamp(26px, 4.4vw, 46px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
  align-items: start;
}

.page-about .about-hero__lead h1 {
  margin: 0;
  font-family: var(--font-body);
  font-size: clamp(29px, 5.2vw, 60px);
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: -0.015em;
  color: var(--rice);
}

.page-about .about-hero__dek {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--rice-soft);
  max-width: 38em;
}

.page-about .about-hero__facts {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--stone);
  border: 1px solid var(--stone);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-hero__facts > div {
  background: var(--panel);
  padding: 15px 16px 17px;
  min-width: 0;
}

.page-about .about-hero__facts dt {
  font-size: 12px;
  line-height: 1.45;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .about-hero__facts dd {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(21px, 3.2vw, 29px);
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--rice);
}

/* ---------- 图像容器 ---------- */

.page-about .about-visual {
  position: relative;
  margin: 0;
  border: 1px solid var(--stone);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel);
}

.page-about .about-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(202deg, rgba(255, 74, 28, 0.14), transparent 48%);
  pointer-events: none;
}

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

.page-about .about-visual--track::after {
  background: linear-gradient(160deg, rgba(58, 224, 200, 0.12), transparent 55%);
}

.page-about .about-visual--team::after {
  background: linear-gradient(210deg, rgba(180, 101, 63, 0.18), transparent 52%);
}

/* ---------- 章节骨架 ---------- */

.page-about .about-chapter {
  padding-block: var(--about-gap);
}

.page-about .chapter-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  align-items: start;
}

.page-about .chapter-no {
  display: block;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(46px, 12vw, 66px);
  line-height: 0.8;
  letter-spacing: -0.03em;
  color: var(--clay);
}

.page-about .chapter-head__text h2 {
  margin: 6px 0 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(25px, 3.6vw, 40px);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--rice);
}

.page-about .about-chapter__lede {
  margin: clamp(20px, 3vw, 28px) 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--rice-soft);
  max-width: 36em;
}

/* ---------- 两栏文字块 ---------- */

.page-about .about-split {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  margin-top: clamp(26px, 4vw, 42px);
}

.page-about .prose p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--rice-soft);
  max-width: 36em;
}

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

.page-about .about-split__link {
  margin-top: 20px;
}

.page-about .about-aside {
  align-self: start;
  border-left: 2px solid var(--clay);
  padding: 4px 0 4px 18px;
  min-width: 0;
}

.page-about .about-aside__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-about .about-aside__list {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .about-aside__list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.68;
  color: var(--rice-soft);
}

.page-about .about-aside__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  border-radius: 1px;
  background: var(--blaze);
}

.page-about .about-aside__foot {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 全宽色块带 ---------- */

.page-about .about-band {
  padding-block: clamp(38px, 5.6vw, 70px);
  border-top: 1px solid var(--stone);
  border-bottom: 1px solid var(--stone);
  background:
    linear-gradient(138deg, rgba(255, 74, 28, 0.15), rgba(58, 224, 200, 0.05) 58%, transparent),
    var(--panel);
}

.page-about .about-band--ops {
  background:
    linear-gradient(122deg, rgba(58, 224, 200, 0.1), rgba(180, 101, 63, 0.14) 68%, transparent),
    var(--panel);
}

.page-about .about-band__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-about .about-band__stats {
  margin: clamp(20px, 3vw, 30px) 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 34px);
}

.page-about .about-band__stats dt {
  font-size: 12px;
  line-height: 1.5;
  color: var(--mist);
}

.page-about .about-band__stats dd {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(29px, 4.4vw, 45px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--rice);
}

.page-about .about-band__stats dd span {
  margin-left: 2px;
  font-size: 0.5em;
  color: var(--mist);
}

.page-about .about-band__note {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--blaze);
  font-size: 14px;
  line-height: 1.78;
  color: var(--rice-soft);
  max-width: 46em;
}

.page-about .about-band__pair {
  margin-top: clamp(20px, 3vw, 30px);
  display: grid;
  gap: clamp(24px, 4vw, 46px);
}

.page-about .about-band__big {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(33px, 5.2vw, 52px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--blaze);
}

.page-about .about-band__cap {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--rice-soft);
  max-width: 30em;
}

/* ---------- 版本时间轴 ---------- */

.page-about .vtrack {
  position: relative;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.page-about .vtrack::before {
  content: "";
  position: absolute;
  top: 5px;
  left: 12.5%;
  right: 12.5%;
  height: 1px;
  background: linear-gradient(90deg, var(--stone), var(--clay) 62%, var(--blaze));
  opacity: 0.75;
}

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

.page-about .vtrack__item a {
  display: grid;
  justify-items: center;
  gap: 9px;
  padding: 0;
  text-align: center;
  text-decoration: none;
  color: inherit;
}

.page-about .vtrack__dot {
  width: 11px;
  height: 11px;
  border: 1px solid var(--mist);
  border-radius: 1px;
  background: var(--void);
  transition:
    background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.page-about .vtrack__item--now .vtrack__dot {
  background: var(--blaze);
  border-color: var(--blaze);
  box-shadow: 0 0 0 4px rgba(255, 74, 28, 0.16);
}

.page-about .vtrack__code {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--rice);
}

.page-about .vtrack__name {
  font-size: 12px;
  line-height: 1.5;
  color: var(--mist);
}

.page-about .vtrack__item a:hover .vtrack__dot,
.page-about .vtrack__item a:focus-visible .vtrack__dot {
  border-color: var(--cyan);
  box-shadow: 0 0 0 4px rgba(58, 224, 200, 0.18);
}

.page-about .vtrack__item a:hover .vtrack__name {
  color: var(--rice);
}

.page-about .about-visual--track {
  margin-top: clamp(28px, 4.4vw, 48px);
}

/* ---------- 版本明细 ---------- */

.page-about .vlist {
  margin: clamp(30px, 4.6vw, 52px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .vlist__item {
  display: grid;
  gap: 12px;
  padding: clamp(20px, 2.8vw, 30px) 0;
  border-top: 1px solid var(--stone);
  scroll-margin-top: 120px;
}

.page-about .vlist__item:last-child {
  border-bottom: 1px solid var(--stone);
}

.page-about .vlist__meta {
  display: flex;
  align-items: baseline;
  gap: 12px;
  min-width: 0;
}

.page-about .vlist__code {
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--clay);
}

.page-about .vlist__item--now .vlist__code {
  color: var(--blaze);
}

.page-about .vlist__era {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .vlist__body h3 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(19px, 2.4vw, 24px);
  line-height: 1.42;
  color: var(--rice);
}

.page-about .vlist__body p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--rice-soft);
  max-width: 42em;
}

/* ---------- 团队名单 ---------- */

.page-about .about-team > .prose {
  margin: 0 0 clamp(22px, 3.2vw, 34px);
}

.page-about .team-roster {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .team-roster li {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 2px 16px;
  padding: 18px 0;
  border-top: 1px solid var(--stone);
}

.page-about .team-roster li:last-child {
  border-bottom: 1px solid var(--stone);
}

.page-about .team-roster__num {
  grid-column: 1;
  grid-row: 1 / span 2;
  align-self: start;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 26px;
  line-height: 1;
  color: var(--blaze);
}

.page-about .team-roster__role {
  grid-column: 2;
  grid-row: 1;
  font-size: 15px;
  letter-spacing: 0.03em;
  color: var(--rice);
}

.page-about .team-roster__desc {
  grid-column: 2;
  grid-row: 2;
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 四道流程 ---------- */

.page-about .flow {
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .flow li {
  display: grid;
  gap: 10px;
  padding: 22px 0;
  border-top: 1px solid var(--stone);
}

.page-about .flow li:last-child {
  border-bottom: 1px solid var(--stone);
}

.page-about .flow__step {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  transition: color var(--dur) var(--ease);
}

.page-about .flow li:hover .flow__step {
  color: var(--blaze);
}

.page-about .flow li p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--rice-soft);
  max-width: 44em;
}

/* ---------- 三条主张 ---------- */

.page-about .tenets {
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .tenets li {
  display: grid;
  gap: 10px;
  padding: clamp(22px, 3.2vw, 34px) 0;
  border-top: 1px solid var(--stone);
}

.page-about .tenets li:last-child {
  border-bottom: 1px solid var(--stone);
}

.page-about .tenets__no {
  display: block;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(38px, 5.8vw, 62px);
  line-height: 0.85;
  letter-spacing: -0.03em;
  color: var(--mist);
  opacity: 0.42;
  transition:
    color var(--dur) var(--ease),
    opacity var(--dur) var(--ease);
}

.page-about .tenets li:hover .tenets__no,
.page-about .tenets li:focus-within .tenets__no {
  color: var(--blaze);
  opacity: 1;
}

.page-about .tenets h3 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(19px, 2.3vw, 24px);
  line-height: 1.42;
  color: var(--rice);
}

.page-about .tenets p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--rice-soft);
  max-width: 42em;
}

/* ---------- 结尾入口 ---------- */

.page-about .about-cta {
  margin-top: clamp(20px, 3.4vw, 40px);
  padding-block: clamp(46px, 6.6vw, 84px) clamp(64px, 9vw, 112px);
  border-top: 1px solid var(--stone);
  background: linear-gradient(180deg, transparent, rgba(19, 28, 46, 0.92));
}

.page-about .about-cta h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(23px, 3.2vw, 33px);
  line-height: 1.32;
  color: var(--rice);
}

.page-about .about-cta p {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--rice-soft);
  max-width: 38em;
}

.page-about .about-cta__actions {
  margin-top: clamp(24px, 3.6vw, 36px);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 20px;
}

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

/* ---------- 滚动节奏 ---------- */

@keyframes aboutBandRise {
  from {
    transform: translateY(4px);
  }
  to {
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: no-preference) {
  @supports (animation-timeline: view()) {
    .page-about .about-band__inner {
      animation: aboutBandRise linear both;
      animation-timeline: view();
      animation-range: entry 5% cover 35%;
    }
  }
}

/* ---------- 断点 ---------- */

@media (min-width: 780px) {
  .page-about .about-band__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-band__pair {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .vlist__item {
    grid-template-columns: 172px minmax(0, 1fr);
    gap: clamp(22px, 3.6vw, 52px);
    align-items: start;
  }

  .page-about .flow li {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: clamp(22px, 3.4vw, 40px);
    align-items: baseline;
  }

  .page-about .tenets li {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: clamp(22px, 3.6vw, 52px);
    align-items: start;
  }
}

@media (min-width: 840px) {
  .page-about .chapter-head {
    grid-template-columns: 128px minmax(0, 1fr);
    gap: 0 32px;
  }

  .page-about .chapter-no {
    font-size: clamp(78px, 7.6vw, 110px);
  }
}

@media (min-width: 900px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  }

  .page-about .about-split--media {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  }
}

@media (min-width: 940px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(40px, 5vw, 72px);
  }
}
<<<END>>>