.page-about {
  --about-gap: clamp(20px, 3.5vw, 40px);
  --about-rule: 1px solid var(--nv-line);
  --about-body: rgba(243, 247, 242, 0.82);
  --about-body-dim: rgba(243, 247, 242, 0.7);
  background: var(--nv-ink);
  color: var(--nv-white);
  font-family: var(--nv-font);
  overflow-x: hidden;
}

/* ===== 首屏 ===== */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(22px, 5vw, 52px) clamp(32px, 6vw, 76px);
  border-bottom: var(--about-rule);
  background:
    radial-gradient(120% 78% at 88% 0%, rgba(183, 255, 60, 0.1), transparent 62%),
    linear-gradient(180deg, #0B2233 0%, #061421 82%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 20px;
  background-image: repeating-linear-gradient(90deg, var(--nv-line) 0 1px, transparent 1px 30px);
  opacity: 0.85;
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: end;
}

.page-about .about-hero__lead {
  display: grid;
  gap: 14px;
  align-content: start;
  min-width: 0;
}

.page-about .about-hero__title {
  margin: 0;
  font-size: clamp(38px, 9.2vw, 88px);
  font-weight: 800;
  line-height: 0.96;
  letter-spacing: 0.05em;
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--about-body);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 6px;
  border: var(--about-rule);
  background: var(--nv-line);
}

.page-about .about-stat {
  display: grid;
  gap: 6px;
  align-content: start;
  padding: 14px 14px 16px;
  background: var(--nv-ink);
}

.page-about .about-stat__num {
  font-family: var(--nv-font-mono);
  font-size: clamp(24px, 4.6vw, 34px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--nv-lime);
}

.page-about .about-stat__label {
  font-size: 12.5px;
  line-height: 1.55;
  letter-spacing: 0.03em;
  color: var(--nv-mute);
}

.page-about .about-hero__media {
  position: relative;
  margin: 0;
  border: var(--about-rule);
  background: var(--nv-panel);
  overflow: hidden;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.05);
}

.page-about .about-hero__media figcaption {
  position: absolute;
  inset: auto 0 0 0;
  padding: 12px 14px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--nv-lime-soft);
  background: linear-gradient(90deg, rgba(6, 20, 33, 0.94), rgba(6, 20, 33, 0));
}

/* ===== 主体骨架 ===== */
.page-about .about-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 4vw, 44px);
  padding-block: clamp(28px, 5vw, 68px) clamp(40px, 7vw, 96px);
}

.page-about .about-index {
  align-self: start;
  min-width: 0;
}

.page-about .about-index__title {
  margin: 0 0 10px;
  padding-bottom: 10px;
  border-bottom: var(--about-rule);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--nv-mute);
}

.page-about .about-index__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 12px;
  border: 1px solid var(--nv-line);
  background: var(--nv-panel);
  color: var(--about-body-dim);
  font-size: 13px;
  white-space: nowrap;
  text-decoration: none;
  transition: color 0.2s var(--nv-ease), border-color 0.2s var(--nv-ease);
}

.page-about .about-index__num {
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--nv-lime);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--nv-white);
  border-color: rgba(183, 255, 60, 0.55);
}

.page-about .about-index__link:focus-visible {
  outline: 2px solid var(--nv-teal);
  outline-offset: 2px;
}

.page-about .about-body {
  min-width: 0;
  display: grid;
  gap: 0;
}

/* ===== 章节 ===== */
.page-about .about-chapter {
  padding-block: clamp(26px, 4.5vw, 52px);
  border-top: var(--about-rule);
}

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

.page-about .about-chapter__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(12px, 2.5vw, 26px);
  align-items: start;
  margin-bottom: clamp(16px, 3vw, 28px);
}

.page-about .about-chapter__num {
  font-family: var(--nv-font-mono);
  font-size: clamp(30px, 6.4vw, 56px);
  line-height: 0.84;
  letter-spacing: 0.04em;
  color: var(--nv-panel);
  -webkit-text-stroke: 1px var(--nv-line);
}

.page-about .about-chapter__headtext {
  min-width: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-chapter__title {
  margin: 0;
  font-size: clamp(21px, 3.4vw, 32px);
  font-weight: 700;
  line-height: 1.32;
  letter-spacing: 0.02em;
}

.page-about .about-text {
  display: grid;
  gap: 14px;
  max-width: 66ch;
}

.page-about .about-text--tight {
  margin-top: clamp(16px, 2.6vw, 24px);
}

.page-about .about-text p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--about-body);
}

.page-about .about-text a {
  color: var(--nv-lime-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(183, 255, 60, 0.5);
}

.page-about .about-text a:hover,
.page-about .about-text a:focus-visible {
  color: var(--nv-white);
  text-decoration-color: var(--nv-lime);
}

/* ===== 时间线 ===== */
.page-about .about-timeline {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding: 0;
  list-style: none;
  border: var(--about-rule);
  background: var(--nv-line);
}

.page-about .about-phase {
  display: grid;
  gap: 9px;
  align-content: start;
  padding: 0 18px 22px;
  background: var(--nv-ink);
}

.page-about .about-phase__ruler {
  display: block;
  height: 24px;
  margin: 0 -18px 14px;
  background-image:
    linear-gradient(var(--nv-line), var(--nv-line)),
    repeating-linear-gradient(90deg, var(--nv-line) 0 1px, transparent 1px 10px);
  background-size: 100% 1px, 100% 8px;
  background-position: 0 100%, 0 0;
  background-repeat: no-repeat, repeat-x;
}

.page-about .about-phase__tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--nv-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--nv-mute);
}

.page-about .about-phase__dot {
  width: 8px;
  height: 8px;
  flex: none;
  background: var(--nv-lime);
  box-shadow: 0 0 0 3px rgba(183, 255, 60, 0.12);
}

.page-about .about-phase--now .about-phase__dot {
  background: var(--nv-orange);
  box-shadow: 0 0 0 3px rgba(255, 138, 61, 0.16);
}

.page-about .about-phase__title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: 0.02em;
}

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

/* ===== 团队角色 ===== */
.page-about .about-roles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(18px, 3vw, 28px);
  border: var(--about-rule);
  background: var(--nv-line);
}

.page-about .about-role {
  position: relative;
  padding: 20px 18px 22px;
  background: var(--nv-panel);
  transition: background 0.2s var(--nv-ease);
}

.page-about .about-role::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 30px;
  height: 2px;
  background: var(--nv-lime);
}

.page-about .about-role:hover {
  background: #0E2A3E;
}

.page-about .about-role__idx {
  display: block;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--nv-mute);
}

.page-about .about-role__name {
  margin: 8px 0 8px;
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: 0.03em;
}

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

.page-about .about-network {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(18px, 3vw, 26px);
}

.page-about .about-network__cell {
  display: grid;
  gap: 4px;
  padding: 4px 0 4px 14px;
  border-left: 2px solid var(--nv-lime);
}

.page-about .about-network__num {
  font-family: var(--nv-font-mono);
  font-size: clamp(22px, 4vw, 30px);
  line-height: 1.1;
  color: var(--nv-lime-soft);
}

.page-about .about-network__label {
  font-size: 13px;
  line-height: 1.65;
  color: var(--nv-mute);
}

/* ===== 图片 ===== */
.page-about .about-figure {
  margin: clamp(18px, 3vw, 28px) 0 0;
  border: var(--about-rule);
  background: var(--nv-panel);
  overflow: hidden;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.9) contrast(1.04);
}

.page-about .about-figure--wide img {
  aspect-ratio: 14 / 9;
}

.page-about .about-figure figcaption {
  padding: 10px 14px;
  border-top: var(--about-rule);
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: 0.03em;
  color: var(--nv-mute);
}

/* ===== 数据流程 ===== */
.page-about .about-steps {
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0 0 0 2px;
  list-style: none;
  display: grid;
  gap: 0;
  max-width: 62ch;
}

.page-about .about-step {
  position: relative;
  padding: 0 0 22px 32px;
}

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

.page-about .about-step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--nv-ink);
  border: 2px solid var(--nv-lime);
  box-sizing: border-box;
}

.page-about .about-step::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 18px;
  bottom: 0;
  width: 1px;
  background: var(--nv-line);
}

.page-about .about-step:last-child::after {
  display: none;
}

.page-about .about-step__name {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.page-about .about-step__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--about-body-dim);
}

/* ===== 使用场景 ===== */
.page-about .about-scenes {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: clamp(6px, 1.5vw, 12px);
}

.page-about .about-scene {
  position: relative;
  display: grid;
  gap: 9px;
  align-content: start;
  padding: 20px 18px 22px;
  border: var(--about-rule);
  background: linear-gradient(180deg, rgba(11, 34, 51, 0.92), rgba(6, 20, 33, 0.92));
  overflow: hidden;
}

.page-about .about-scene::after {
  content: "";
  position: absolute;
  right: -20px;
  top: -20px;
  width: 56px;
  height: 56px;
  border: 1px solid var(--nv-line);
  transform: rotate(45deg);
  pointer-events: none;
}

.page-about .about-scene__title {
  margin: 0;
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.page-about .about-scene__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.74;
  color: var(--about-body-dim);
}

.page-about .about-scene__link {
  justify-self: start;
  margin-top: 4px;
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(183, 255, 60, 0.5);
  color: var(--nv-lime);
  font-size: 13px;
  letter-spacing: 0.05em;
  text-decoration: none;
  transition: color 0.2s var(--nv-ease), border-color 0.2s var(--nv-ease);
}

.page-about .about-scene__link:hover,
.page-about .about-scene__link:focus-visible {
  color: var(--nv-white);
  border-bottom-color: var(--nv-white);
}

/* ===== 行动区 ===== */
.page-about .about-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: clamp(26px, 4.5vw, 44px);
  padding: clamp(20px, 4vw, 32px);
  border: 1px solid rgba(255, 138, 61, 0.36);
  background: linear-gradient(120deg, rgba(255, 138, 61, 0.14), rgba(6, 20, 33, 0) 62%);
}

.page-about .about-cta__title {
  margin: 0 0 8px;
  font-size: clamp(18px, 2.6vw, 25px);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.02em;
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 58ch;
  font-size: 14px;
  line-height: 1.74;
  color: var(--about-body-dim);
}

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

/* ===== 响应式 ===== */
@media (min-width: 620px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-network {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }
}

@media (min-width: 760px) {
  .page-about .about-scenes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 24px;
  }
}

@media (min-width: 880px) {
  .page-about .about-timeline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.55fr) minmax(220px, 0.85fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .about-shell {
    grid-template-columns: 188px minmax(0, 1fr);
    gap: clamp(28px, 4.5vw, 64px);
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--nv-top-h) + 22px);
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--nv-line);
  }

  .page-about .about-index__link {
    justify-content: flex-start;
    margin-left: -1px;
    padding: 9px 10px 9px 12px;
    border: 0;
    border-left: 2px solid transparent;
    background: transparent;
    white-space: normal;
    line-height: 1.5;
  }

  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    border-left-color: var(--nv-lime);
    color: var(--nv-white);
  }
}

@media (min-width: 1120px) {
  .page-about .about-roles {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-chapter__head {
    gap: 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role,
  .page-about .about-scene__link,
  .page-about .about-index__link {
    transition: none;
  }
}
<<<END>>>