.page-about {
  --about-pad: clamp(2.75rem, 7vw, 6rem);
  --about-rule: rgba(157, 179, 170, 0.16);
  --about-body: rgba(244, 247, 242, 0.8);
  --about-cell: clamp(64px, 7vw, 96px);
  background: linear-gradient(180deg, #0B211B 0%, #06120F 42%, #06120F 100%);
  color: var(--white);
  font-family: var(--font-body);
  line-height: 1.55;
  overflow-x: hidden;
}

.page-about .about-topbar {
  padding-top: 1.15rem;
}

.page-about .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-about .breadcrumbs__list li + li::before {
  content: "/";
  margin-right: 0.4rem;
  color: var(--line);
}

.page-about .breadcrumbs__list a {
  color: var(--muted);
  text-decoration: none;
}

.page-about .breadcrumbs__list a:hover,
.page-about .breadcrumbs__list a:focus-visible {
  color: var(--lime);
}

.page-about .breadcrumbs__list [aria-current="page"] {
  color: var(--white);
}

.page-about .mono {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  padding: 1.5rem 0 0;
}

.page-about .about-hero__frame {
  position: relative;
  padding: clamp(1.5rem, 4vw, 3.25rem);
  padding-top: clamp(1.9rem, 4.6vw, 3.6rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-organic);
  background:
    repeating-linear-gradient(90deg, var(--about-rule) 0 1px, transparent 1px var(--about-cell)),
    repeating-linear-gradient(0deg, var(--about-rule) 0 1px, transparent 1px var(--about-cell)),
    linear-gradient(158deg, rgba(18, 51, 42, 0.9), rgba(6, 18, 15, 0.96));
  box-shadow: var(--shadow);
  overflow: hidden;
}

.page-about .about-hero__frame::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--lime) 0 34%, var(--blue) 34% 44%, var(--orange) 44% 48%, transparent 48%);
}

.page-about .about-kicker {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  color: var(--lime);
}

.page-about .about-hero h1 {
  margin: 0.85rem 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(2.3rem, 6.6vw, 4.3rem);
  line-height: 1.02;
  letter-spacing: 0.01em;
  max-width: 20ch;
}

.page-about .about-hero h1 em {
  font-style: normal;
  color: var(--lime);
}

.page-about .about-hero__lede {
  margin: 1.15rem 0 0;
  max-width: 62ch;
  font-size: clamp(0.95rem, 1.05vw, 1.05rem);
  color: var(--about-body);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(1.6rem, 4vw, 2.4rem) 0 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--line);
  overflow: hidden;
}

.page-about .about-stats li {
  padding: 0.9rem 1rem 1rem;
  background: rgba(6, 18, 15, 0.72);
}

.page-about .about-stats__num {
  display: block;
  font-size: clamp(1.35rem, 3.6vw, 2rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--lime);
  line-height: 1.1;
}

.page-about .about-stats__unit {
  font-size: 0.62em;
  margin-left: 0.1em;
}

.page-about .about-stats__label {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-about .about-hero__media {
  margin-top: clamp(1.6rem, 4vw, 2.4rem);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  background: linear-gradient(140deg, #12332A, #06120F);
}

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

/* ---------- 章节索引 ---------- */
.page-about .about-index {
  margin-top: 1.4rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-index ul {
  display: flex;
  gap: 0.5rem;
  margin: 0;
  padding: 0.7rem 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-index a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.34rem 0.75rem;
  white-space: nowrap;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .about-index a .mono {
  color: var(--lime);
  font-size: 0.7rem;
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  color: var(--ink);
  background: var(--lime);
  border-color: var(--lime);
}

.page-about .about-index a:hover .mono,
.page-about .about-index a:focus-visible .mono {
  color: var(--ink);
}

/* ---------- 章节外壳 ---------- */
.page-about .about-chapter {
  padding: var(--about-pad) 0;
  position: relative;
}

.page-about .about-chapter--band {
  background: linear-gradient(180deg, rgba(11, 33, 27, 0.96), rgba(18, 51, 42, 0.55));
  clip-path: polygon(0 26px, 100% 0, 100% calc(100% - 26px), 0 100%);
  padding-top: calc(var(--about-pad) + 26px);
  padding-bottom: calc(var(--about-pad) + 26px);
}

.page-about .about-chapter__head {
  display: grid;
  gap: 0.7rem;
  margin-bottom: clamp(1.6rem, 4vw, 2.6rem);
}

.page-about .about-chapter__num {
  margin: 0;
  font-size: 0.8rem;
  letter-spacing: 0.3em;
  color: var(--lime);
}

.page-about .about-chapter__num::after {
  content: "";
  display: block;
  width: 42px;
  height: 2px;
  margin-top: 0.5rem;
  background: linear-gradient(90deg, var(--lime), transparent);
}

.page-about .about-chapter h2 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.7rem, 3.4vw, 2.7rem);
  line-height: 1.06;
  letter-spacing: 0.01em;
  max-width: 22ch;
}

.page-about .about-chapter__lede {
  margin: 0.75rem 0 0;
  max-width: 64ch;
  font-size: clamp(0.95rem, 1.05vw, 1.04rem);
  color: var(--about-body);
}

/* ---------- 01 起点 ---------- */
.page-about .about-split {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .about-prose p {
  margin: 0 0 1rem;
  color: var(--about-body);
  font-size: clamp(0.95rem, 1.02vw, 1.02rem);
}

.page-about .about-checklist {
  margin: 1.4rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.7rem;
}

.page-about .about-checklist li {
  position: relative;
  padding-left: 1.5rem;
  font-size: 0.94rem;
  color: var(--white);
}

.page-about .about-checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 12px;
  height: 2px;
  background: var(--lime);
}

.page-about .about-figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-organic);
  padding: 0.6rem;
  background: rgba(18, 51, 42, 0.42);
}

.page-about .about-figure .media {
  border-radius: 12px;
  overflow: hidden;
  background: linear-gradient(150deg, #12332A, #06120F);
}

.page-about .about-figure .media__caption {
  margin: 0.65rem 0.15rem 0.1rem;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-about .about-figure--wide {
  margin-top: clamp(1.8rem, 4vw, 2.6rem);
}

/* ---------- 02 四道工序 ---------- */
.page-about .about-flow {
  border-top: 1px solid var(--line);
}

.page-about .about-flow .accordion__item {
  border-bottom: 1px solid var(--line);
  background: rgba(6, 18, 15, 0.32);
}

.page-about .about-flow .accordion__trigger {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  width: 100%;
  padding: 1.05rem 0.9rem;
  background: transparent;
  border: 0;
  color: var(--white);
  text-align: left;
  font-family: var(--font-body);
  font-size: 1rem;
  cursor: pointer;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease);
}

.page-about .about-flow .accordion__trigger:hover,
.page-about .about-flow .accordion__trigger:focus-visible {
  background: rgba(200, 255, 61, 0.07);
}

.page-about .about-flow__step {
  flex: none;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--lime);
  padding: 0.15rem 0.4rem;
  border: 1px solid var(--line);
  border-radius: 4px;
}

.page-about .about-flow__title {
  flex: 1 1 auto;
  font-weight: 600;
  font-size: clamp(0.95rem, 1.5vw, 1.12rem);
  line-height: 1.3;
}

.page-about .about-flow .accordion__icon {
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
  border: 1px solid var(--line);
  border-radius: 50%;
}

.page-about .about-flow .accordion__icon::before,
.page-about .about-flow .accordion__icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--lime);
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

.page-about .about-flow .accordion__icon::before {
  width: 8px;
  height: 2px;
  transform: translate(-50%, -50%);
}

.page-about .about-flow .accordion__icon::after {
  width: 2px;
  height: 8px;
  transform: translate(-50%, -50%);
}

.page-about .about-flow .accordion__item[data-open] .accordion__icon {
  border-color: var(--lime);
}

.page-about .about-flow .accordion__item[data-open] .accordion__icon::after {
  opacity: 0;
  transform: translate(-50%, -50%) scaleY(0);
}

.page-about .about-flow .accordion__body {
  padding: 0 0.9rem 1.15rem 0.9rem;
}

.page-about .about-flow .accordion__body p {
  margin: 0;
  max-width: 70ch;
  font-size: 0.94rem;
  color: var(--about-body);
}

/* ---------- 03 一个账号 ---------- */
.page-about .about-relay {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1rem;
}

.page-about .about-relay li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  padding: 1.1rem 1.15rem;
  border-left: 2px solid var(--line);
  background: linear-gradient(100deg, rgba(18, 51, 42, 0.6), rgba(6, 18, 15, 0.15));
  border-radius: 0 14px 14px 0;
  transition: border-color 0.18s var(--ease);
}

.page-about .about-relay li:hover {
  border-left-color: var(--lime);
}

.page-about .about-relay__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  font-size: 0.9rem;
  color: var(--ink);
  background: var(--lime);
  border-radius: 50%;
}

.page-about .about-relay h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.1rem, 1.6vw, 1.35rem);
  letter-spacing: 0.02em;
}

.page-about .about-relay p {
  margin: 0;
  font-size: 0.93rem;
  color: var(--about-body);
}

.page-about .about-inline-link {
  margin: 1.5rem 0 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.page-about .about-inline-link a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 123, 255, 0.5);
}

.page-about .about-inline-link a:hover,
.page-about .about-inline-link a:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

/* ---------- 04 换新价值 ---------- */
.page-about .about-gain {
  display: grid;
  gap: clamp(1.4rem, 3.5vw, 2.4rem);
}

.page-about .about-gain__figure {
  padding: 1.4rem;
  border: 1px solid var(--line);
  border-radius: 18px 12px 20px 10px;
  background:
    repeating-linear-gradient(0deg, var(--about-rule) 0 1px, transparent 1px 28px),
    linear-gradient(160deg, rgba(200, 255, 61, 0.1), rgba(6, 18, 15, 0.6));
}

.page-about .about-gain__num {
  display: block;
  font-size: clamp(3rem, 10vw, 5rem);
  font-weight: 600;
  line-height: 0.95;
  color: var(--lime);
  letter-spacing: -0.03em;
}

.page-about .about-gain__unit {
  font-size: 0.5em;
  margin-left: 0.08em;
}

.page-about .about-gain__cap {
  margin: 0.8rem 0 0;
  font-size: 0.88rem;
  color: var(--about-body);
  max-width: 24ch;
}

.page-about .about-gain__list {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
}

.page-about .about-gain__item {
  padding: 1.1rem 1.15rem;
  background: rgba(6, 18, 15, 0.68);
}

.page-about .about-gain__item h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
  letter-spacing: 0.02em;
  color: var(--white);
}

.page-about .about-gain__item p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--about-body);
}

/* ---------- 05 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 2.4rem;
  list-style: none;
  display: grid;
  gap: 1rem;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--lime), var(--blue) 60%, var(--line));
}

.page-about .about-stage {
  position: relative;
}

.page-about .about-stage::before {
  content: "";
  position: absolute;
  left: -2.4rem;
  top: 0.9rem;
  width: 12px;
  height: 12px;
  margin-left: 2px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--lime);
}

.page-about .about-stage__card {
  padding: 1.1rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(150deg, rgba(18, 51, 42, 0.72), rgba(6, 18, 15, 0.62));
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-stage__card:hover {
  transform: translateX(3px);
  border-color: var(--line);
}

.page-about .about-stage--current .about-stage__card {
  border-color: rgba(47, 123, 255, 0.6);
  box-shadow: inset 3px 0 0 var(--blue);
}

.page-about .about-stage__tag {
  margin: 0 0 0.5rem;
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-about .about-stage--current .about-stage__tag {
  color: var(--blue);
}

.page-about .about-stage h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.1rem, 1.7vw, 1.4rem);
  letter-spacing: 0.02em;
}

.page-about .about-stage p {
  margin: 0;
  font-size: 0.93rem;
  color: var(--about-body);
}

/* ---------- 06 团队与生态 ---------- */
.page-about .about-team {
  display: grid;
  gap: 1rem;
}

.page-about .about-role {
  padding: 1.1rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: 16px 12px 18px 10px;
  background: rgba(11, 33, 27, 0.72);
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-about .about-role:hover,
.page-about .about-role:focus-within {
  border-color: var(--lime);
  background: rgba(18, 51, 42, 0.85);
  transform: translateY(-2px);
}

.page-about .about-role h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.08rem, 1.6vw, 1.32rem);
  letter-spacing: 0.02em;
  color: var(--lime);
}

.page-about .about-role p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--about-body);
}

.page-about .about-eco {
  margin-top: clamp(1.8rem, 4vw, 2.8rem);
  padding: clamp(1.2rem, 3.5vw, 2rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-organic);
  background:
    repeating-linear-gradient(90deg, var(--about-rule) 0 1px, transparent 1px var(--about-cell)),
    linear-gradient(160deg, rgba(18, 51, 42, 0.5), rgba(6, 18, 15, 0.3));
}

.page-about .about-eco__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.2rem, 2.2vw, 1.6rem);
  letter-spacing: 0.02em;
}

.page-about .about-eco__lede {
  margin: 0.6rem 0 1.3rem;
  max-width: 62ch;
  font-size: 0.93rem;
  color: var(--about-body);
}

.page-about .about-eco__grid {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
}

.page-about .about-eco__grid li {
  padding: 1rem 1.05rem;
  background: rgba(6, 18, 15, 0.7);
}

.page-about .about-eco__grid strong {
  display: block;
  margin-bottom: 0.3rem;
  font-size: 0.94rem;
  color: var(--lime-soft);
  letter-spacing: 0.02em;
}

.page-about .about-eco__grid span {
  font-size: 0.88rem;
  color: var(--about-body);
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  padding: var(--about-pad) 0 clamp(2.5rem, 6vw, 4.5rem);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 1.5rem;
  padding: clamp(1.4rem, 4vw, 2.6rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-organic);
  background: linear-gradient(140deg, rgba(200, 255, 61, 0.12), rgba(18, 51, 42, 0.7) 55%, rgba(6, 18, 15, 0.8));
}

.page-about .about-cta h2 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  line-height: 1.06;
  letter-spacing: 0.01em;
}

.page-about .about-cta p {
  margin: 0.7rem 0 0;
  max-width: 56ch;
  font-size: 0.95rem;
  color: var(--about-body);
}

.page-about .about-cta__meta {
  font-size: 0.86rem;
  color: var(--lime);
  letter-spacing: 0.02em;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.page-about .about-cta__actions .btn {
  flex: 1 1 auto;
  min-width: 9rem;
  text-align: center;
}

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

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

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

  .page-about .about-timeline {
    padding-left: 2.8rem;
  }

  .page-about .about-stage::before {
    left: -2.8rem;
  }
}

@media (min-width: 1024px) {
  .page-about .about-chapter__head {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: clamp(1.5rem, 3vw, 2.8rem);
    align-items: start;
  }

  .page-about .about-chapter__num {
    padding-top: 0.35rem;
    font-size: 0.9rem;
    text-align: left;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-about .about-gain {
    grid-template-columns: minmax(220px, 0.62fr) minmax(0, 1.38fr);
    align-items: start;
  }

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

  .page-about .about-relay li {
    grid-template-columns: 1fr;
    border-left: 0;
    border-top: 2px solid var(--line);
    border-radius: 0 0 14px 14px;
    padding: 1.2rem 1.1rem;
  }

  .page-about .about-relay li:hover {
    border-top-color: var(--lime);
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.5fr) minmax(240px, 0.9fr);
    align-items: end;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }

  .page-about .about-cta__actions .btn {
    flex: 0 0 auto;
  }

  .page-about .about-hero__media {
    margin-top: clamp(2rem, 4vw, 2.8rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index a,
  .page-about .about-role,
  .page-about .about-stage__card,
  .page-about .about-flow .accordion__icon::before,
  .page-about .about-flow .accordion__icon::after {
    transition: none;
  }
}
<<<END>>>