.page-about {
  padding-bottom: clamp(64px, 8vw, 120px);
}

.page-about .about-crumb-wrap {
  padding-top: clamp(20px, 3vw, 34px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(20px, 3vw, 34px) 0 clamp(52px, 7vw, 96px);
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.5vw, 48px);
}

@media (min-width: 1000px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }
}

.page-about .about-hero-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: clamp(26px, 4vw, 56px);
  background:
    radial-gradient(130% 100% at 0% 0%, rgba(43, 240, 181, 0.13), transparent 58%),
    linear-gradient(155deg, var(--indigo-deep) 0%, var(--ink) 74%);
}

.page-about .about-hero-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background-image:
    repeating-linear-gradient(90deg, rgba(43, 240, 181, 0.07) 0 1px, transparent 1px 76px),
    repeating-linear-gradient(0deg, rgba(43, 240, 181, 0.07) 0 1px, transparent 1px 76px);
  pointer-events: none;
}

.page-about .about-hero-frame::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--mint) 0%, var(--mint-press) 34%, transparent 92%);
}

.page-about .about-hero-frame > * {
  position: relative;
  z-index: 1;
}

.page-about .about-hero-frame h1 {
  margin: 18px 0 16px;
  max-width: 22ch;
  font-family: var(--font-headline);
  font-weight: 600;
  font-size: clamp(27px, 4.4vw, 50px);
  line-height: 1.2;
  letter-spacing: 0.01em;
  color: var(--silver);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero-stats {
  display: grid;
  gap: 14px;
}

.page-about .about-stat {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 20px 22px 22px;
  background: linear-gradient(180deg, var(--indigo) 0%, rgba(23, 36, 74, 0.32) 100%);
}

.page-about .about-stat .stat-num {
  color: var(--mint);
}

.page-about .about-stat-unit {
  margin-left: 8px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--amber);
}

.page-about .about-stat p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 三个老问题 ---------- */
.page-about .about-problem-grid {
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .about-problem {
  position: relative;
  padding: 28px 26px 30px;
}

.page-about .about-problem-index {
  display: inline-block;
  margin-bottom: 16px;
  padding: 4px 13px;
  border: 1px dashed rgba(255, 196, 107, 0.5);
  border-radius: var(--radius-pill);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--amber);
}

.page-about .about-problem h3 {
  margin: 0 0 12px;
  font-family: var(--font-headline);
  font-weight: 600;
  font-size: clamp(19px, 2.1vw, 24px);
  line-height: 1.38;
  color: var(--silver);
}

.page-about .about-problem p {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline-banner {
  margin: clamp(28px, 4vw, 46px) 0 0;
}

.page-about .about-axis {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  margin: clamp(30px, 4vw, 48px) 0 22px;
  padding-top: 20px;
}

.page-about .about-axis-line {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--line) 6%, var(--mint-press) 50%, var(--line) 94%, transparent 100%);
}

.page-about .about-axis-tick {
  position: relative;
  padding-top: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--mist);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

.page-about .about-axis-tick::before {
  content: "";
  position: absolute;
  top: -5px;
  left: 0;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 4px rgba(43, 240, 181, 0.14);
}

.page-about .about-axis-tick:hover,
.page-about .about-axis-tick:focus-visible {
  color: var(--mint);
}

.page-about .about-era-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-era {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(14, 23, 48, 0.55);
  overflow: hidden;
  transition: border-color 0.2s var(--ease);
}

.page-about .about-era:hover {
  border-color: rgba(43, 240, 181, 0.42);
}

.page-about .about-era summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 22px;
  cursor: pointer;
  list-style: none;
}

.page-about .about-era summary::-webkit-details-marker {
  display: none;
}

.page-about .about-era-year {
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--mint);
  flex: none;
}

.page-about .about-era-name {
  flex: 1;
  min-width: 0;
  font-family: var(--font-headline);
  font-weight: 600;
  font-size: 18px;
  line-height: 1.4;
  color: var(--silver);
}

.page-about .about-era-mark {
  flex: none;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 1px solid var(--mint);
  transition: background 0.2s var(--ease);
}

.page-about .about-era[open] .about-era-mark {
  background: var(--mint);
}

.page-about .about-era p {
  margin: 0;
  padding: 0 22px 22px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 团队 ---------- */
.page-about .about-team-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 52px);
}

@media (min-width: 1000px) {
  .page-about .about-team-layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }
}

.page-about .about-team-copy > p {
  max-width: 62ch;
  margin: 6px 0 0;
  font-size: 17px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-team-roles {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .about-team-roles li {
  border-left: 2px solid var(--mint-press);
  padding: 2px 0 2px 20px;
}

.page-about .about-role-name {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-headline);
  font-weight: 600;
  font-size: 19px;
  color: var(--silver);
}

.page-about .about-team-roles p {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}

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

/* ---------- 覆盖范围 ---------- */
.page-about .about-coverage-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 52px);
}

@media (min-width: 1000px) {
  .page-about .about-coverage-layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: center;
  }
}

.page-about .about-coverage-bars {
  display: grid;
  gap: 26px;
  margin-top: 32px;
}

.page-about .about-bar {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 10px 20px;
}

.page-about .about-bar .stat-num {
  font-size: clamp(38px, 5.2vw, 64px);
  line-height: 0.92;
  color: var(--mint);
}

.page-about .about-bar-track {
  height: 7px;
  border-radius: var(--radius-pill);
  background: rgba(42, 53, 80, 0.85);
  overflow: hidden;
}

.page-about .about-bar-fill {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--mint-press) 0%, var(--mint) 100%);
}

.page-about .about-bar:nth-child(1) .about-bar-fill {
  width: 46%;
}

.page-about .about-bar:nth-child(2) .about-bar-fill {
  width: 34%;
}

.page-about .about-bar:nth-child(3) .about-bar-fill {
  width: 100%;
}

.page-about .about-bar p {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

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

/* ---------- 数字怎么来 ---------- */
.page-about .about-verify-frame {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: clamp(28px, 4vw, 56px);
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(255, 138, 61, 0.09), transparent 58%),
    linear-gradient(180deg, rgba(14, 23, 48, 0.92) 0%, rgba(5, 7, 13, 0.72) 100%);
}

.page-about .about-verify-steps {
  margin-top: clamp(26px, 3.5vw, 40px);
}

.page-about .about-step {
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.page-about .about-step-num {
  display: block;
  margin-bottom: 12px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--amber);
}

.page-about .about-step h3 {
  margin: 0 0 10px;
  font-family: var(--font-headline);
  font-weight: 600;
  font-size: 19px;
  line-height: 1.4;
  color: var(--silver);
}

.page-about .about-step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-verify-note {
  margin: clamp(26px, 3.5vw, 38px) 0 0;
  padding-left: 18px;
  border-left: 2px solid var(--mint-press);
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 往前看 ---------- */
.page-about .about-next-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
}

@media (min-width: 900px) {
  .page-about .about-next-layout {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-about .about-next-cta {
    grid-column: 2;
  }
}

.page-about .about-next-head > p {
  margin: 8px 0 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-next-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-next-list li {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 22px 24px 24px;
  background: linear-gradient(180deg, rgba(23, 36, 74, 0.6) 0%, rgba(23, 36, 74, 0.18) 100%);
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-next-list li:hover {
  transform: translateY(-2px);
  border-color: rgba(43, 240, 181, 0.45);
}

.page-about .about-next-num {
  display: block;
  margin-bottom: 10px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mint);
}

.page-about .about-next-list h3 {
  margin: 0 0 8px;
  font-family: var(--font-headline);
  font-weight: 600;
  font-size: 20px;
  line-height: 1.4;
  color: var(--silver);
}

.page-about .about-next-list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-next-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 22px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.page-about .about-next-cta p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}
<<<END>>>