.page-about {
  --about-rule: rgba(41, 231, 208, .16);
  --about-rule-soft: rgba(143, 166, 188, .18);
  --about-sec-gap: clamp(46px, 7vw, 88px);
  display: block;
  padding-bottom: clamp(56px, 8vw, 110px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 5vw, 40px);
  align-items: center;
  padding: clamp(22px, 5vw, 52px) 0 clamp(34px, 6vw, 64px);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: clamp(64px, 14vw, 160px);
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--amber));
}

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

.page-about .about-hero h1 {
  margin: 12px 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-stretch: condensed;
  letter-spacing: -0.02em;
  font-size: clamp(28px, 6vw, 56px);
  line-height: 1.1;
  color: var(--text);
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 40ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-hero__mark {
  order: -1;
  max-width: 260px;
  width: 100%;
  margin: 0 auto;
}

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

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .6fr);
    gap: clamp(32px, 5vw, 72px);
  }
  .page-about .about-hero__mark {
    order: 0;
    max-width: 100%;
    margin: 0;
  }
}

/* ---------- 主体：目录 + 正文 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
  padding-top: clamp(28px, 4vw, 48px);
}

.page-about .about-toc {
  min-width: 0;
  border-bottom: 1px solid var(--about-rule-soft);
  padding-bottom: 14px;
}

.page-about .about-toc__title {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .about-toc__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 2px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.page-about .about-toc__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-toc__link {
  display: inline-block;
  white-space: nowrap;
  padding: 7px 13px;
  border: 1px solid var(--about-rule-soft);
  border-radius: 999px;
  font-size: 12.5px;
  line-height: 1.2;
  color: var(--muted);
  text-decoration: none;
  transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
  background: var(--cyan-soft);
}

.page-about .about-toc__link[aria-current="true"],
.page-about .about-toc__link.is-active {
  color: var(--cyan);
  border-color: var(--cyan);
  background: var(--cyan-soft);
}

@media (min-width: 1080px) {
  .page-about .about-layout {
    grid-template-columns: 216px minmax(0, 1fr);
    gap: clamp(40px, 5vw, 76px);
    align-items: start;
  }
  .page-about .about-toc {
    position: sticky;
    top: calc(var(--top-h) + 32px);
    align-self: start;
    border-bottom: none;
    border-left: 2px solid var(--about-rule-soft);
    padding: 4px 0 4px 20px;
  }
  .page-about .about-toc__list {
    display: block;
    overflow: visible;
  }
  .page-about .about-toc__list li + li {
    margin-top: 4px;
  }
  .page-about .about-toc__link {
    display: block;
    padding: 9px 0;
    border: none;
    border-radius: 0;
    background: none;
    font-size: 13.5px;
    position: relative;
  }
  .page-about .about-toc__link::before {
    content: "";
    position: absolute;
    left: -22px;
    top: 50%;
    width: 0;
    height: 2px;
    background: var(--cyan);
    transform: translateY(-50%);
    transition: width .24s ease-out;
  }
  .page-about .about-toc__link:hover,
  .page-about .about-toc__link:focus-visible,
  .page-about .about-toc__link[aria-current="true"],
  .page-about .about-toc__link.is-active {
    background: none;
  }
  .page-about .about-toc__link[aria-current="true"]::before,
  .page-about .about-toc__link.is-active::before {
    width: 14px;
  }
}

/* ---------- 章节通用 ---------- */
.page-about .about-flow {
  min-width: 0;
}

.page-about .about-sec {
  padding: clamp(40px, 6vw, 78px) 0;
  border-bottom: 1px solid var(--about-rule-soft);
  scroll-margin-top: calc(var(--top-h) + 24px);
}

.page-about .about-sec:last-of-type {
  border-bottom: none;
}

.page-about .about-sec__head {
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-about .about-sec__head .section-title {
  margin: 10px 0 0;
  font-size: clamp(22px, 3.3vw, 36px);
  line-height: 1.2;
  color: var(--text);
}

.page-about .about-lead {
  margin: 0 0 clamp(22px, 3vw, 34px);
  max-width: 62ch;
  font-size: clamp(15px, 1.5vw, 16.5px);
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 时间带 ---------- */
.page-about .about-ridge {
  position: relative;
  height: clamp(84px, 13vw, 148px);
  margin: 0 0 clamp(26px, 4vw, 44px);
  overflow: hidden;
  border-radius: 4px;
  background: var(--ink-deep);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}

.page-about .about-ridge::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(10, 26, 47, .92), rgba(20, 117, 107, .42) 52%, rgba(6, 16, 32, .94));
  pointer-events: none;
}

.page-about .about-ridge__img {
  position: absolute;
  inset: 0;
  width: 100%;
  max-width: none;
  height: 100%;
  object-fit: cover;
  opacity: .55;
}

.page-about .about-ridge {
  box-shadow: inset 0 0 0 1px var(--about-rule);
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 30px 34px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 22px;
  bottom: 0;
  width: 1px;
  background: var(--about-rule);
}

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

.page-about .about-timeline__dot {
  position: absolute;
  left: 0;
  top: 4px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  border: 2px solid var(--cyan);
  background: var(--ink);
  box-shadow: 0 0 0 4px rgba(41, 231, 208, .1);
  transition: box-shadow .2s ease, border-color .2s ease;
}

.page-about .about-timeline__item:hover .about-timeline__dot {
  border-color: var(--amber);
  box-shadow: 0 0 0 6px rgba(240, 180, 41, .16);
}

.page-about .about-timeline__idx {
  margin: 0 0 6px;
  font-size: 11px;
  letter-spacing: .24em;
  color: var(--amber);
}

.page-about .about-timeline__name {
  margin: 0 0 8px;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text);
}

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

@media (min-width: 900px) {
  .page-about .about-timeline {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
  .page-about .about-timeline__item {
    padding: 32px 16px 0 0;
  }
  .page-about .about-timeline__item::before {
    left: 8px;
    right: 0;
    top: 7px;
    bottom: auto;
    width: auto;
    height: 1px;
  }
  .page-about .about-timeline__item:last-child::before {
    display: none;
  }
  .page-about .about-timeline__dot {
    top: 0;
    left: 0;
  }
}

/* ---------- 数据运营 ---------- */
.page-about .about-data-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
  align-items: start;
}

.page-about .about-prose {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.page-about .about-prose__main p {
  margin: 0 0 16px;
  max-width: 38ch;
  font-size: clamp(14.5px, 1.5vw, 16px);
  line-height: 1.82;
  color: var(--text);
}

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

.page-about .about-note {
  margin: 0;
  padding: 4px 0 4px 12px;
  border-left: 2px solid var(--teal);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .04em;
  color: var(--muted);
}

@media (min-width: 940px) {
  .page-about .about-data-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  }
  .page-about .about-prose {
    grid-template-columns: minmax(0, 1fr) 58px;
    gap: 26px;
  }
  .page-about .about-note {
    writing-mode: vertical-rl;
    justify-self: end;
    border-left: none;
    border-top: 2px solid var(--teal);
    padding: 12px 0 0;
    letter-spacing: .22em;
    line-height: 2;
  }
}

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

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
  object-fit: cover;
}

.page-about .about-figure .figure__caption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 团队分工 ---------- */
.page-about .about-team-figure {
  margin: 0 0 clamp(22px, 3vw, 34px);
}

.page-about .about-team-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}

.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .about-team__card {
  padding: clamp(20px, 3vw, 28px);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
  transition: transform .22s ease-out, box-shadow .22s ease-out;
}

.page-about .about-team__card:hover {
  transform: translateY(-2px);
  box-shadow: inset 0 0 0 1px var(--cyan);
}

.page-about .about-team__tag {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-about .about-team__name {
  margin: 0 0 14px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text);
}

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

.page-about .about-team__list li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 9px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-team__list li:last-child {
  margin-bottom: 0;
}

.page-about .about-team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 1px;
  background: var(--amber);
}

.page-about .about-team__foot {
  margin: clamp(20px, 3vw, 30px) 0 0;
  max-width: 60ch;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

@media (min-width: 760px) {
  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 区域覆盖 ---------- */
.page-about .about-region {
  padding: clamp(22px, 4vw, 42px);
  border-radius: 4px;
  background:
    radial-gradient(120% 130% at 100% 0%, rgba(43, 27, 74, .92) 0%, rgba(10, 26, 47, .96) 62%),
    var(--panel);
  box-shadow: inset 0 0 0 1px var(--about-rule);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

.page-about .about-region .section-title {
  color: var(--text);
}

.page-about .about-region__lead {
  margin: 0 0 clamp(22px, 3vw, 32px);
  max-width: 58ch;
  font-size: clamp(14.5px, 1.5vw, 16px);
  line-height: 1.8;
  color: rgba(230, 238, 245, .82);
}

.page-about .about-bars {
  margin: 0 0 clamp(24px, 3.5vw, 34px);
  padding: 0;
  list-style: none;
}

.page-about .about-bars__row {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr) 34px;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid rgba(230, 238, 245, .1);
}

.page-about .about-bars__row:last-child {
  border-bottom: none;
}

.page-about .about-bars__name {
  font-size: 14px;
  color: var(--text);
}

.page-about .about-bars__track {
  position: relative;
  display: block;
  height: 6px;
  border-radius: 3px;
  background: rgba(230, 238, 245, .1);
  overflow: hidden;
}

.page-about .about-bars__fill {
  display: block;
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--teal), var(--cyan));
  transition: filter .2s ease-out;
}

.page-about .about-bars__row:nth-child(1) .about-bars__fill { width: 100%; }
.page-about .about-bars__row:nth-child(2) .about-bars__fill { width: 84%; }
.page-about .about-bars__row:nth-child(3) .about-bars__fill { width: 76%; }

.page-about .about-bars__row:hover .about-bars__fill {
  filter: brightness(1.35);
}

.page-about .about-bars__rank {
  font-size: 13px;
  color: var(--amber);
  text-align: right;
}

.page-about .about-region__stats {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-region__stat {
  padding: 14px 16px;
  border-left: 2px solid var(--amber);
  background: rgba(6, 16, 32, .5);
}

.page-about .about-region__num {
  margin: 0 0 4px;
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1.1;
  letter-spacing: .01em;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

.page-about .about-region__label {
  margin: 0;
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--muted);
}

@media (min-width: 700px) {
  .page-about .about-region__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}

/* ---------- 迭代原则 ---------- */
.page-about .about-rituals {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

.page-about .about-ritual {
  position: relative;
  padding: 20px 0 20px 0;
  border-top: 1px solid var(--about-rule-soft);
}

.page-about .about-ritual:last-child {
  border-bottom: 1px solid var(--about-rule-soft);
}

.page-about .about-ritual__idx {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: .24em;
  color: var(--cyan);
}

.page-about .about-ritual__name {
  margin: 0 0 8px;
  font-size: clamp(16px, 2vw, 19px);
  font-weight: 700;
  line-height: 1.35;
  color: var(--text);
}

.page-about .about-ritual__desc {
  margin: 0;
  max-width: 58ch;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

@media (min-width: 860px) {
  .page-about .about-rituals {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(28px, 4vw, 56px);
  }
  .page-about .about-ritual:nth-child(odd) {
    padding-right: 8px;
  }
  .page-about .about-ritual:last-child {
    border-bottom: none;
  }
  .page-about .about-ritual:nth-last-child(2) {
    border-bottom: 1px solid var(--about-rule-soft);
  }
}

/* ---------- 结尾引导 ---------- */
.page-about .about-cta {
  margin-top: clamp(40px, 6vw, 70px);
  padding: clamp(26px, 4.5vw, 52px);
  border-radius: 4px;
  background:
    radial-gradient(130% 140% at 0% 0%, rgba(74, 18, 48, .96) 0%, rgba(6, 16, 32, .96) 66%),
    var(--ink-deep);
  box-shadow: inset 0 0 0 1px var(--about-rule);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .about-cta__kicker {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .26em;
  color: var(--cyan);
}

.page-about .about-cta__title {
  margin: 0 0 14px;
  font-size: clamp(20px, 3vw, 30px);
  font-weight: 800;
  font-stretch: condensed;
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--text);
}

.page-about .about-cta__lead {
  margin: 0 0 clamp(20px, 3vw, 28px);
  max-width: 56ch;
  font-size: clamp(14.5px, 1.5vw, 16px);
  line-height: 1.8;
  color: rgba(230, 238, 245, .82);
}

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

.page-about .about-cta__links {
  margin: clamp(18px, 3vw, 26px) 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 13px;
}

.page-about .about-cta__links a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color .2s ease, border-color .2s ease;
}

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-toc__link,
  .page-about .about-toc__link::before,
  .page-about .about-timeline__dot,
  .page-about .about-team__card,
  .page-about .about-bars__fill,
  .page-about .about-cta__links a {
    transition: none;
  }
  .page-about .about-team__card:hover {
    transform: none;
  }
}
<<<END>>>