.page-about {
  --about-gap: clamp(22px, 4vw, 44px);
  --about-index-w: 190px;
  background: var(--ink);
  color: var(--paper);
}

.page-about a {
  color: inherit;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(22px, 4vw, 44px) 0 clamp(28px, 4vw, 48px);
  background:
    radial-gradient(120% 90% at 85% 0%, rgba(53, 224, 208, .10), transparent 60%),
    var(--ink);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  margin-top: clamp(16px, 3vw, 28px);
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 6.4vw, 56px);
  line-height: 1.08;
  letter-spacing: -.02em;
  margin: .3em 0 .55em;
}

.page-about .about-hero .lede {
  max-width: 54ch;
}

.page-about .about-hero .btn-row {
  margin-top: clamp(18px, 3vw, 28px);
}

.page-about .about-hero__visual {
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(16, 42, 67, .9), rgba(8, 19, 31, .95));
  padding: clamp(14px, 2.5vw, 22px);
  box-shadow: var(--shadow-card);
}

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: center;
  }
}

/* ---------- 规模数据带 ---------- */
.page-about .about-stats {
  background: var(--ink-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

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

.page-about .about-stat {
  padding: clamp(16px, 2.8vw, 26px) clamp(12px, 2vw, 20px);
  border-left: 1px solid var(--line-soft);
}

.page-about .about-stat:nth-child(odd) {
  border-left: 0;
}

.page-about .about-stat:nth-child(n + 3) {
  border-top: 1px solid var(--line-soft);
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 4.2vw, 38px);
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: -.02em;
}

.page-about .about-stat__unit {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan);
  margin-left: 3px;
}

.page-about .about-stat__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

@media (min-width: 760px) {
  .page-about .about-stats__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-stat:nth-child(odd) {
    border-left: 1px solid var(--line-soft);
  }

  .page-about .about-stat:first-child {
    border-left: 0;
  }

  .page-about .about-stat:nth-child(n + 3) {
    border-top: 0;
  }
}

/* ---------- 主体：索引 + 长卷 ---------- */
.page-about .about-body {
  display: grid;
  gap: 0;
  padding-top: clamp(24px, 4vw, 44px);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-about .about-index {
  margin-bottom: clamp(6px, 1.5vw, 14px);
}

.page-about .about-index__title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mist);
  margin: 0 0 10px;
}

.page-about .about-index__list {
  list-style: none;
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 10px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .about-index__list li {
  flex: 0 0 auto;
}

.page-about .about-index__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 7px 12px;
  border: 1px solid var(--line-soft);
  font-size: 13px;
  line-height: 1.4;
  white-space: nowrap;
  text-decoration: none;
  color: var(--mist);
  transition: border-color .2s ease, color .2s ease, background-color .2s ease;
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
}

.page-about .about-index__list a.is-active {
  border-color: var(--cyan);
  color: var(--ink);
  background: var(--cyan);
}

.page-about .about-index__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  opacity: .8;
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: var(--about-index-w) minmax(0, 1fr);
    column-gap: clamp(30px, 4vw, 60px);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 26px);
    margin-bottom: 0;
    border-left: 1px solid var(--line);
    padding-left: 16px;
  }

  .page-about .about-index__list {
    flex-direction: column;
    overflow: visible;
    gap: 2px;
    padding-bottom: 0;
  }

  .page-about .about-index__list a {
    display: flex;
    width: 100%;
    border: 0;
    border-left: 1px solid transparent;
    background: none;
    padding: 9px 10px 9px 12px;
    margin-left: -17px;
    white-space: normal;
  }

  .page-about .about-index__list a:hover,
  .page-about .about-index__list a:focus-visible {
    border-left-color: var(--line);
    color: var(--cyan);
  }

  .page-about .about-index__list a.is-active {
    border-left-color: var(--amber);
    background: none;
    color: var(--amber);
  }
}

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  padding: clamp(26px, 4vw, 46px) 0;
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-about .about-chapter:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-chapter .section-head {
  margin-bottom: clamp(16px, 2.6vw, 26px);
}

.page-about .about-chapter .section-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 3.4vw, 34px);
  line-height: 1.22;
  letter-spacing: -.01em;
  margin: 0;
}

.page-about .about-lead {
  font-size: clamp(15px, 1.9vw, 17px);
  line-height: 1.8;
  color: var(--paper);
  opacity: .88;
  max-width: 68ch;
  margin: 0 0 clamp(16px, 2.5vw, 24px);
}

.page-about .about-textlink {
  display: inline-block;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 208, .4);
  padding-bottom: 2px;
}

.page-about .about-textlink:hover,
.page-about .about-textlink:focus-visible {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

/* 奶油纸段落 */
.page-about .about-sheet {
  margin: 0 0 clamp(18px, 2.6vw, 26px);
  padding: clamp(18px, 3vw, 30px);
}

.page-about .about-sheet p {
  color: var(--brown);
  font-size: clamp(15px, 1.8vw, 16.5px);
  line-height: 1.8;
  margin: 0 0 12px;
  max-width: 66ch;
}

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

/* 双栏对照 */
.page-about .about-compare {
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-compare__col {
  background: var(--ink-2);
  padding: clamp(16px, 2.6vw, 24px);
}

.page-about .about-compare__col--new {
  background: linear-gradient(180deg, rgba(53, 224, 208, .07), rgba(16, 42, 67, .95));
}

.page-about .about-compare__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
}

.page-about .about-compare__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
  margin-bottom: 9px;
}

.page-about .about-compare__col--new .about-compare__list li {
  color: var(--paper);
  opacity: .9;
}

.page-about .about-compare__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 6px;
  height: 1px;
  background: var(--mist);
}

.page-about .about-compare__col--new .about-compare__list li::before {
  background: var(--cyan);
}

@media (min-width: 780px) {
  .page-about .about-compare {
    grid-template-columns: 1fr 1fr;
  }
}

/* ---------- 四阶段时间线 ---------- */
.page-about .about-figure {
  margin: 0 0 clamp(18px, 2.8vw, 26px);
}

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

.page-about .about-phases {
  list-style: none;
  margin: 0;
  padding: 0 0 0 clamp(16px, 2.6vw, 26px);
  border-left: 1px solid var(--line);
}

.page-about .about-phase {
  position: relative;
  margin-bottom: 10px;
}

.page-about .about-phase::before {
  content: "";
  position: absolute;
  left: calc(-1 * clamp(16px, 2.6vw, 26px) - 5px);
  top: 20px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--mist);
  box-shadow: 0 0 0 3px var(--ink);
  transition: background-color .2s ease, box-shadow .2s ease;
}

.page-about .about-phase:hover::before {
  background: var(--cyan);
  box-shadow: 0 0 0 3px var(--ink), 0 0 12px rgba(53, 224, 208, .55);
}

.page-about .about-phase--current::before {
  background: var(--amber);
  box-shadow: 0 0 0 3px var(--ink), 0 0 12px rgba(255, 138, 61, .5);
}

.page-about .about-phase__item {
  border: 1px solid var(--line-soft);
  background: rgba(16, 42, 67, .55);
}

.page-about .about-phase__item[open] {
  border-color: var(--line);
  background: rgba(16, 42, 67, .9);
}

.page-about .about-phase__item .disclosure__summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px clamp(14px, 2vw, 20px);
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-phase__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .about-phase__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(16px, 2.2vw, 19px);
  color: var(--paper);
}

.page-about .about-phase__meta {
  font-size: 13px;
  color: var(--mist);
  margin-left: auto;
  text-align: right;
}

.page-about .about-phase__item .disclosure__body {
  padding: 0 clamp(14px, 2vw, 20px) clamp(14px, 2vw, 20px);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-phase__item .disclosure__body p {
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--paper);
  opacity: .88;
  margin: 14px 0 10px;
}

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

.page-about .about-phase__facts li {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
  padding-left: 14px;
  position: relative;
}

.page-about .about-phase__facts li::before {
  content: "›";
  position: absolute;
  left: 0;
  color: var(--cyan);
}

@media (max-width: 520px) {
  .page-about .about-phase__meta {
    display: none;
  }
}

/* ---------- 版本治理 ---------- */
.page-about .about-governance {
  display: grid;
  gap: clamp(18px, 3vw, 28px);
  margin-bottom: clamp(18px, 3vw, 28px);
}

.page-about .about-governance__text p {
  font-size: clamp(14.5px, 1.8vw, 16px);
  line-height: 1.82;
  color: var(--paper);
  opacity: .9;
  max-width: 62ch;
  margin: 0 0 14px;
}

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

@media (min-width: 860px) {
  .page-about .about-governance {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: start;
  }
}

.page-about .about-cadence {
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-cadence__item {
  background: var(--ink-2);
  padding: clamp(13px, 2vw, 18px);
}

.page-about .about-cadence__key {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--amber);
  border: 1px solid rgba(255, 138, 61, .45);
  padding: 2px 8px;
  margin-bottom: 8px;
}

.page-about .about-cadence__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

@media (min-width: 700px) {
  .page-about .about-cadence {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1080px) {
  .page-about .about-cadence {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ---------- 团队 ---------- */
.page-about .about-teams {
  list-style: none;
  margin: 0 0 clamp(20px, 3vw, 30px);
  padding: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-team {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 14px;
  padding: clamp(14px, 2.2vw, 20px) 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-team__no {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan);
  letter-spacing: .1em;
  padding-top: 4px;
}

.page-about .about-team__body h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(16px, 2.2vw, 18px);
  margin: 0 0 6px;
  color: var(--paper);
}

.page-about .about-team__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--mist);
  max-width: 62ch;
}

@media (min-width: 960px) {
  .page-about .about-team {
    grid-template-columns: 40px 190px minmax(0, 1fr);
    align-items: baseline;
  }

  .page-about .about-team__body {
    display: contents;
  }

  .page-about .about-team__body h3 {
    margin: 0;
  }
}

/* ---------- 行业矩阵 ---------- */
.page-about .about-industries {
  list-style: none;
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-industry {
  background: var(--ink);
  border-top: 2px solid transparent;
  padding: clamp(14px, 2.4vw, 20px);
  transition: border-color .2s ease, background-color .2s ease;
}

.page-about .about-industry:hover,
.page-about .about-industry:focus-within {
  border-top-color: var(--cyan);
  background: var(--ink-2);
}

.page-about .about-industry h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15.5px;
  margin: 0 0 6px;
  color: var(--cyan);
  letter-spacing: .02em;
}

.page-about .about-industry p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--mist);
}

@media (min-width: 620px) {
  .page-about .about-industries {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .page-about .about-industries {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 生态与荣誉 ---------- */
.page-about .about-eco {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-about .about-eco__num {
  font-family: var(--font-mono);
  font-size: clamp(44px, 7vw, 72px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  margin: 0;
  letter-spacing: -.03em;
}

.page-about .about-eco__num span {
  font-size: 15px;
  letter-spacing: .1em;
  margin-left: 6px;
  color: var(--mist);
}

.page-about .about-eco__cap {
  font-size: 14px;
  line-height: 1.7;
  color: var(--amber);
  margin: 10px 0 16px;
  max-width: 34ch;
}

.page-about .about-eco__main p {
  font-size: clamp(14.5px, 1.8vw, 16px);
  line-height: 1.82;
  color: var(--paper);
  opacity: .88;
  max-width: 60ch;
  margin: 0 0 12px;
}

.page-about .about-eco__side {
  background: var(--ink-deep);
  border: 1px solid var(--line);
  padding: clamp(16px, 2.6vw, 24px);
}

.page-about .about-eco__title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mist);
  margin: 0 0 14px;
}

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

.page-about .about-eco__list li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--mist);
  padding: 9px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-eco__list li span {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--cyan);
  min-width: 58px;
}

.page-about .about-honor {
  margin-top: 16px;
  border-left: 2px solid var(--rust);
  padding-left: 14px;
}

.page-about .about-honor__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14.5px;
  color: var(--paper);
  margin: 0 0 6px;
}

.page-about .about-honor p:last-child {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--mist);
}

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

/* ---------- 下一步 ---------- */
.page-about .about-chapter--last {
  border-top-color: var(--line);
}

.page-about .about-next {
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-next__card {
  display: block;
  background: var(--ink-2);
  padding: clamp(15px, 2.4vw, 22px);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: border-color .2s ease, background-color .2s ease, transform .2s ease;
}

.page-about .about-next__card:hover,
.page-about .about-next__card:focus-visible {
  border-left-color: var(--cyan);
  background: rgba(53, 224, 208, .08);
}

.page-about .about-next__card--accent {
  border-left-color: var(--amber);
  background: linear-gradient(180deg, rgba(255, 138, 61, .12), rgba(16, 42, 67, .95));
}

.page-about .about-next__card--accent:hover,
.page-about .about-next__card--accent:focus-visible {
  border-left-color: var(--amber);
  background: linear-gradient(180deg, rgba(255, 138, 61, .2), rgba(16, 42, 67, .98));
}

.page-about .about-next__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--mist);
  margin-bottom: 8px;
}

.page-about .about-next__name {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--paper);
  margin-bottom: 6px;
}

.page-about .about-next__desc {
  display: block;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}

@media (min-width: 700px) {
  .page-about .about-next {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1080px) {
  .page-about .about-next {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 通用防溢出 ---------- */
.page-about img,
.page-about svg {
  max-width: 100%;
}
<<<END>>>