.page-about {
  --about-ink-a: rgba(6, 35, 28, .92);
  --about-ink-b: rgba(11, 27, 51, .86);
  --about-layer-soft: rgba(14, 47, 43, .62);
  --about-role-c: #3E8C82;
  --about-role-d: #7C97A1;
}

/* ---------- 首屏封面 ---------- */
.page-about .about-cover {
  position: relative;
  overflow: hidden;
  padding-top: clamp(20px, 4vw, 40px);
  padding-bottom: clamp(38px, 6vw, 74px);
}

.page-about .about-cover::before {
  content: "";
  position: absolute;
  inset: -26% -8% auto -8%;
  height: 82%;
  pointer-events: none;
  background:
    radial-gradient(58% 68% at 80% 8%, rgba(184, 255, 60, .16), transparent 64%),
    radial-gradient(50% 62% at 10% 2%, rgba(255, 179, 71, .12), transparent 62%),
    linear-gradient(180deg, rgba(11, 27, 51, .88), rgba(6, 35, 28, 0) 80%);
}

.page-about .about-cover .sl-wrap {
  position: relative;
  z-index: 1;
}

.page-about .about-cover__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  margin-top: clamp(16px, 3vw, 28px);
}

.page-about .about-cover__title {
  margin: 14px 0 0;
  color: var(--paper);
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -.02em;
  line-height: 1.04;
}

.page-about .about-cover__lead {
  margin-top: 18px;
  max-width: 46ch;
  color: var(--mist);
}

.page-about .about-cover__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-cover__figure {
  margin: 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(160deg, rgba(11, 27, 51, .8), rgba(14, 47, 43, .55));
  box-shadow: var(--shadow-card);
}

.page-about .about-cover__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

.page-about .about-cover__meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-faint);
  border: 1px solid var(--line-faint);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .about-cover__meta li {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  background: rgba(10, 42, 38, .78);
}

.page-about .about-cover__num {
  color: var(--paper);
  font-size: 1.28rem;
  letter-spacing: .04em;
}

.page-about .about-cover__label {
  color: var(--slate);
  font-size: .82rem;
  line-height: 1.6;
}

/* ---------- 正文骨架：索引 + 内容流 ---------- */
.page-about .about-body {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-about .about-index {
  border: 1px solid var(--line-faint);
  border-radius: var(--radius-md);
  background: var(--about-ink-b);
  padding: 14px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
}

.page-about .about-index__title {
  margin: 0 0 10px;
  color: var(--slate);
  font-size: .72rem;
  letter-spacing: .2em;
}

.page-about .about-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
}

.page-about .about-index__list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-pill);
  color: var(--mist);
  font-size: .84rem;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  border-color: var(--lime);
  color: var(--paper);
  transform: translateY(-2px);
}

.page-about .about-index__list .sl-mono {
  color: var(--lime-deep);
  font-size: .72rem;
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  scroll-margin-top: 112px;
}

.page-about .about-sec + .about-sec {
  margin-top: clamp(44px, 6vw, 84px);
}

.page-about .about-sec__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  margin-bottom: clamp(20px, 3vw, 30px);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-sec__num {
  flex: none;
  color: var(--lime-deep);
  font-size: .76rem;
  letter-spacing: .16em;
}

.page-about .about-sec__head .sl-h2 {
  margin: 0;
  color: var(--paper);
}

.page-about .about-copy p {
  max-width: 40ch;
  color: var(--mist);
  font-size: 1rem;
  line-height: 1.85;
}

.page-about .about-copy p + p {
  margin-top: 14px;
}

.page-about .about-note {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
  padding: 16px 18px;
  border: 1px dashed var(--line-soft);
  border-radius: var(--radius-md);
  background: rgba(14, 47, 43, .38);
}

.page-about .about-note p {
  margin: 0;
  max-width: 52ch;
  color: var(--slate);
  font-size: .9rem;
  line-height: 1.7;
}

/* ---------- 坐标四行 ---------- */
.page-about .about-coords {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-coords__item {
  display: grid;
  gap: 10px;
  padding: 22px 0 24px;
  border-top: 1px solid var(--line-faint);
}

.page-about .about-coords__item:last-child {
  border-bottom: 1px solid var(--line-faint);
}

.page-about .about-coords__key {
  display: inline-block;
  align-self: start;
  padding: 4px 12px;
  border: 1px solid rgba(184, 255, 60, .38);
  border-radius: var(--radius-pill);
  background: rgba(184, 255, 60, .08);
  color: var(--lime-deep);
  font-size: .72rem;
  letter-spacing: .12em;
  justify-self: start;
}

.page-about .about-coords__body .sl-h3 {
  margin: 0 0 8px;
  color: var(--paper);
}

.page-about .about-coords__body p {
  margin: 0;
  max-width: 44ch;
  color: var(--mist);
  font-size: .95rem;
  line-height: 1.8;
}

/* ---------- 版本演进 ---------- */
.page-about .about-evo {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

.page-about .about-evo__figure {
  margin: 0;
  border: 1px solid var(--line-faint);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(180deg, rgba(11, 27, 51, .7), rgba(14, 47, 43, .45));
}

.page-about .about-evo__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.page-about .about-tl {
  position: relative;
  margin: 0;
  padding: 0 0 0 26px;
  list-style: none;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, rgba(184, 255, 60, .5), rgba(30, 74, 68, .5) 40%, rgba(30, 74, 68, .12));
}

.page-about .about-tl__item {
  position: relative;
  padding-bottom: 26px;
}

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

.page-about .about-tl__dot {
  position: absolute;
  left: -26px;
  top: 9px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--line);
}

.page-about .about-tl__item--now .about-tl__dot {
  background: var(--lime);
  border-color: var(--lime);
  box-shadow: 0 0 0 6px rgba(184, 255, 60, .14);
}

.page-about .about-tl__year {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 12px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-pill);
  background: rgba(14, 47, 43, .7);
  color: var(--mist);
  font-size: .74rem;
  letter-spacing: .12em;
}

.page-about .about-tl__year--now {
  border-color: rgba(184, 255, 60, .45);
  background: rgba(184, 255, 60, .1);
  color: var(--paper);
}

.page-about .about-tl__title {
  margin: 0 0 6px;
  color: var(--paper);
}

.page-about .about-tl__text {
  margin: 0;
  max-width: 44ch;
  color: var(--slate);
  font-size: .92rem;
  line-height: 1.78;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: clamp(26px, 4vw, 40px);
  margin-top: 28px;
  align-items: center;
}

.page-about .about-ring {
  position: relative;
  width: min(228px, 62vw);
  aspect-ratio: 1;
  margin-inline: auto;
  border-radius: 50%;
  background: conic-gradient(
    var(--lime) 0deg 128.6deg,
    var(--amber) 128.6deg 231.4deg,
    var(--about-role-c) 231.4deg 325.7deg,
    var(--about-role-d) 325.7deg 360deg
  );
  box-shadow: 0 32px 68px -46px rgba(0, 0, 0, .95);
}

.page-about .about-ring::after {
  content: "";
  position: absolute;
  inset: 26%;
  border-radius: 50%;
  background: linear-gradient(160deg, var(--night), var(--ink));
  border: 1px solid var(--line-soft);
  z-index: 0;
}

.page-about .about-ring__center {
  position: absolute;
  inset: 26%;
  display: grid;
  place-content: center;
  gap: 2px;
  text-align: center;
  z-index: 1;
}

.page-about .about-ring__num {
  color: var(--paper);
  font-size: 1.6rem;
  letter-spacing: .04em;
}

.page-about .about-ring__unit {
  color: var(--slate);
  font-size: .72rem;
  letter-spacing: .1em;
}

.page-about .about-roles {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--line-faint);
  border: 1px solid var(--line-faint);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .about-roles__item {
  display: flex;
  gap: 14px;
  padding: 16px 18px;
  background: var(--about-layer-soft);
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-roles__item:hover,
.page-about .about-roles__item:focus-within {
  background: rgba(14, 47, 43, .85);
  transform: translateX(3px);
}

.page-about .about-roles__dot {
  flex: none;
  width: 10px;
  height: 10px;
  margin-top: 8px;
  border-radius: 50%;
}

.page-about .about-roles__dot--a { background: var(--lime); }
.page-about .about-roles__dot--b { background: var(--amber); }
.page-about .about-roles__dot--c { background: var(--about-role-c); }
.page-about .about-roles__dot--d { background: var(--about-role-d); }

.page-about .about-roles__name {
  margin: 0 0 4px;
  color: var(--paper);
  font-size: .96rem;
}

.page-about .about-roles__name .sl-mono {
  margin-left: 8px;
  color: var(--slate);
  font-size: .76rem;
  letter-spacing: .1em;
}

.page-about .about-roles__desc {
  margin: 0;
  color: var(--mist);
  font-size: .88rem;
  line-height: 1.72;
}

.page-about .about-rhythm {
  display: grid;
  gap: 1px;
  margin-top: clamp(26px, 4vw, 38px);
  background: var(--line-faint);
  border: 1px solid var(--line-faint);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-about .about-rhythm__item {
  padding: 20px;
  background: rgba(11, 27, 51, .62);
}

.page-about .about-rhythm__num {
  margin: 0 0 8px;
  color: var(--lime-deep);
  font-size: 1.15rem;
  letter-spacing: .06em;
}

.page-about .about-rhythm__label {
  margin: 0;
  max-width: 34ch;
  color: var(--mist);
  font-size: .9rem;
  line-height: 1.72;
}

/* ---------- 生态数据面板 ---------- */
.page-about .about-panel {
  margin-top: clamp(24px, 3.5vw, 34px);
  padding: 6px clamp(16px, 2.4vw, 24px);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background: linear-gradient(140deg, rgba(11, 27, 51, .78), rgba(14, 47, 43, .55));
}

.page-about .about-panel__row {
  display: grid;
  gap: 4px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line-faint);
}

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

.page-about .about-panel__k {
  color: var(--slate);
  font-size: .78rem;
  letter-spacing: .08em;
}

.page-about .about-panel__v {
  color: var(--mist);
  font-size: .94rem;
  line-height: 1.7;
}

.page-about .about-panel__v.sl-mono {
  color: var(--paper);
  letter-spacing: .1em;
}

/* ---------- 三件事 ---------- */
.page-about .about-pledge {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line-faint);
  border: 1px solid var(--line-faint);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-about .about-pledge__item {
  padding: clamp(20px, 3vw, 28px);
  background: rgba(14, 47, 43, .58);
}

.page-about .about-pledge__idx {
  display: block;
  margin-bottom: 12px;
  color: var(--amber);
  font-size: .74rem;
  letter-spacing: .18em;
}

.page-about .about-pledge__item .sl-h3 {
  margin: 0 0 10px;
  color: var(--paper);
}

.page-about .about-pledge__item p {
  margin: 0;
  color: var(--mist);
  font-size: .92rem;
  line-height: 1.78;
}

/* ---------- 收尾入口 ---------- */
.page-about .about-cta {
  display: grid;
  gap: 18px;
  margin-top: clamp(44px, 6vw, 76px);
  padding: clamp(22px, 4vw, 38px);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background: linear-gradient(120deg, rgba(11, 27, 51, .9), rgba(14, 47, 43, .68));
}

.page-about .about-cta .sl-h3 {
  margin: 0 0 10px;
  color: var(--paper);
}

.page-about .about-cta p {
  margin: 0;
  max-width: 56ch;
  color: var(--mist);
  font-size: .94rem;
  line-height: 1.78;
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-cover__meta {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-rhythm {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-panel__row {
    grid-template-columns: 132px minmax(0, 1fr);
    align-items: baseline;
    gap: 18px;
  }
}

@media (min-width: 760px) {
  .page-about .about-coords__item {
    grid-template-columns: 148px minmax(0, 1fr);
    gap: 22px;
    align-items: start;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 880px) {
  .page-about .about-evo {
    grid-template-columns: minmax(0, 1fr) 290px;
    align-items: start;
  }

  .page-about .about-evo__figure {
    position: sticky;
    top: 104px;
  }

  .page-about .about-pledge {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-team {
    grid-template-columns: 250px minmax(0, 1fr);
  }

  .page-about .about-cover__grid {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, .96fr);
    align-items: end;
  }
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: clamp(38px, 5vw, 72px);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 100px;
    overflow: visible;
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: 6px;
    padding-bottom: 0;
  }

  .page-about .about-index__list a {
    width: 100%;
    border-color: transparent;
    border-radius: var(--radius-sm);
    padding: 8px 10px;
  }

  .page-about .about-index__list a:hover,
  .page-about .about-index__list a:focus-visible {
    border-color: var(--line-soft);
    background: rgba(184, 255, 60, .06);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__list a,
  .page-about .about-roles__item {
    transition: none;
  }

  .page-about .about-index__list a:hover,
  .page-about .about-roles__item:hover {
    transform: none;
  }
}
<<<END>>>