.page-about {
  position: relative;
  overflow-x: clip;
}

.page-about .about-hero {
  padding-bottom: clamp(40px, 6vw, 88px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 56px);
  align-items: end;
  margin-top: clamp(24px, 4vw, 48px);
}

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

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-size: clamp(2.05rem, 6.4vw, 3.9rem);
  line-height: 1.06;
  letter-spacing: -0.035em;
  color: var(--paper);
  text-wrap: balance;
}

.page-about .about-hero__lede {
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  max-width: 34em;
  font-size: clamp(1rem, 1.5vw, 1.0625rem);
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 16px;
  margin-top: clamp(24px, 3.4vw, 34px);
}

.page-about .about-figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  background: var(--ink-panel);
  border: 1px solid var(--line-dark);
  border-radius: 0;
}

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

.page-about .about-figure__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 8px 12px;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--ink-deep);
  background: var(--fluoro);
}

.page-about .about-hero__figure {
  aspect-ratio: 16 / 9;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(36px, 5vw, 60px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-dark);
  border-top: 1px solid var(--line-dark);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(16px, 2.4vw, 24px) clamp(12px, 2vw, 20px);
  background: var(--ink);
  min-width: 0;
}

.page-about .about-stat__num {
  font-size: clamp(1.5rem, 3.4vw, 2.1rem);
  letter-spacing: -0.02em;
  color: var(--fluoro);
  line-height: 1;
}

.page-about .about-stat__label {
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--muted);
}

/* ---------- 章节骨架与纵向导线 ---------- */

.page-about .about-sec {
  position: relative;
  padding-block: clamp(52px, 8vw, 108px);
}

.page-about .about-sec--ink {
  border-top: 1px solid var(--line-dark-soft);
}

.page-about .about-sec__grid {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 0 clamp(12px, 2vw, 28px);
}

.page-about .about-rail {
  position: relative;
  min-width: 0;
}

.page-about .about-rail::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 6px;
  width: 1px;
  background: var(--line-dark);
}

.page-about .about-sec--paper .about-rail::before {
  background: var(--line-paper);
}

.page-about .about-rail__dot {
  position: sticky;
  top: calc(var(--header-h) + 32px);
  display: block;
  width: 13px;
  height: 13px;
  margin-left: 0;
  background: var(--fluoro);
  border-radius: 0;
}

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

.page-about .about-sec h2 {
  margin: 10px 0 0;
  color: var(--paper);
  font-size: clamp(1.55rem, 3.6vw, 2.5rem);
  line-height: 1.16;
  letter-spacing: -0.02em;
  max-width: 22em;
  text-wrap: balance;
}

.page-about .about-sec__lede {
  margin: clamp(14px, 2vw, 18px) 0 0;
  max-width: 40em;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-sec__tail {
  margin: clamp(24px, 3.4vw, 32px) 0 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-sec__tail a {
  color: var(--fluoro);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 浅色阅读段 ---------- */

.page-about .about-sec--paper {
  color: var(--paper-ink);
}

.page-about .about-sec--paper h2 {
  color: var(--paper-ink);
}

.page-about .about-sec--paper .about-sec__lede,
.page-about .about-sec--paper .about-sec__tail {
  color: rgba(11, 31, 25, 0.74);
}

.page-about .about-sec--paper .about-sec__tail a {
  color: var(--paper-ink);
}

.page-about .about-sec__figure {
  aspect-ratio: 16 / 9;
  margin-top: clamp(24px, 3.6vw, 36px);
  border-color: var(--line-paper);
  background: var(--paper-shade);
}

/* ---------- 时间线 ---------- */

.page-about .tl {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}

.page-about .tl__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 0 0 clamp(18px, 2.4vw, 26px);
  border-bottom: 1px solid var(--line-dark-soft);
  min-width: 0;
}

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

.page-about .tl__year {
  font-size: clamp(1.9rem, 5.2vw, 2.6rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--fluoro);
}

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

.page-about .tl__body h3 {
  margin: 0 0 8px;
  color: var(--paper);
  font-size: clamp(1.05rem, 1.9vw, 1.3rem);
  line-height: 1.35;
}

.page-about .tl__body p {
  margin: 0 0 10px;
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .tl__note {
  display: inline-block;
  margin: 4px 0 0;
  padding: 6px 10px;
  font-size: 0.82rem;
  line-height: 1.65;
  color: var(--steel-light);
  border-left: 2px solid var(--line-dark);
  background: rgba(22, 56, 44, 0.55);
  transition: border-color 180ms ease, color 180ms ease;
}

.page-about .tl__item:hover .tl__note,
.page-about .tl__item:focus-within .tl__note {
  border-left-color: var(--fluoro);
  color: var(--paper);
}

/* ---------- 能力路径 ---------- */

.page-about .path {
  list-style: none;
  margin: clamp(26px, 3.6vw, 38px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-paper);
  border: 1px solid var(--line-paper);
}

.page-about .path__step {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 0 clamp(12px, 2vw, 22px);
  padding: clamp(18px, 2.6vw, 26px) clamp(14px, 2.2vw, 24px);
  background: var(--paper);
  min-width: 0;
  transition: background-color 180ms ease, box-shadow 180ms ease;
}

.page-about .path__step:hover,
.page-about .path__step:focus-within {
  background: #F7F3E7;
  box-shadow: inset 3px 0 0 0 var(--fluoro);
}

.page-about .path__idx {
  font-size: 0.9rem;
  font-weight: 500;
  line-height: 1.7;
  color: var(--paper-ink);
  border: 1px solid var(--line-paper);
  text-align: center;
  align-self: start;
  padding: 2px 0;
}

.page-about .path__step:hover .path__idx {
  background: var(--fluoro);
  border-color: var(--fluoro);
}

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

.page-about .path__main h3 {
  margin: 0 0 8px;
  color: var(--paper-ink);
  font-size: clamp(1.02rem, 1.8vw, 1.22rem);
  line-height: 1.4;
}

.page-about .path__main p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: rgba(11, 31, 25, 0.78);
}

.page-about .path__tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 12px 0 0;
  padding: 0;
}

.page-about .tag {
  padding: 3px 9px;
  font-size: 0.75rem;
  line-height: 1.6;
  color: var(--paper-ink);
  border: 1px solid rgba(11, 31, 25, 0.28);
  background: transparent;
  white-space: nowrap;
}

/* ---------- 团队 ---------- */

.page-about .team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.4vw, 36px);
  margin-top: clamp(26px, 3.6vw, 38px);
}

.page-about .team__figure {
  aspect-ratio: 3 / 2;
}

.page-about .team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-dark-soft);
  min-width: 0;
}

.page-about .team__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "num title"
    "num text";
  gap: 2px clamp(12px, 2vw, 18px);
  padding: clamp(14px, 2vw, 20px) 0;
  background: var(--ink);
  min-width: 0;
}

.page-about .team__num {
  grid-area: num;
  font-size: clamp(1.4rem, 3vw, 1.85rem);
  line-height: 1.1;
  color: var(--score);
  min-width: 2.2ch;
}

.page-about .team__item h3 {
  grid-area: title;
  margin: 0;
  color: var(--paper);
  font-size: 1rem;
  line-height: 1.4;
}

.page-about .team__item p {
  grid-area: text;
  margin: 4px 0 0;
  font-size: 0.92rem;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 合作生态 ---------- */

.page-about .partner {
  list-style: none;
  margin: clamp(24px, 3.4vw, 36px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-paper);
  border-top: 1px solid var(--line-paper);
  border-bottom: 1px solid var(--line-paper);
}

.page-about .partner__item {
  padding: clamp(18px, 2.6vw, 26px) 0;
  background: var(--paper);
  min-width: 0;
}

.page-about .partner__num {
  display: inline-block;
  font-size: clamp(1.5rem, 3.2vw, 2rem);
  line-height: 1;
  color: var(--paper-ink);
  padding-bottom: 6px;
  border-bottom: 2px solid var(--fluoro);
}

.page-about .partner__item h3 {
  margin: 10px 0 8px;
  color: var(--paper-ink);
  font-size: clamp(1rem, 1.8vw, 1.18rem);
  line-height: 1.4;
}

.page-about .partner__item p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: rgba(11, 31, 25, 0.78);
}

/* ---------- 资质与收尾 ---------- */

.page-about .about-trust {
  padding-bottom: clamp(52px, 7vw, 96px);
}

.page-about .about-trust__lines {
  list-style: none;
  margin: clamp(24px, 3.4vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-trust__lines li {
  padding: clamp(14px, 2vw, 18px) 0;
  border-bottom: 1px solid var(--line-dark-soft);
  font-size: clamp(0.98rem, 1.6vw, 1.1rem);
  line-height: 1.75;
  color: var(--paper);
  max-width: 44em;
}

.page-about .about-trust__lines li:first-child {
  border-top: 1px solid var(--line-dark-soft);
}

.page-about .cert {
  list-style: none;
  margin: clamp(26px, 3.6vw, 36px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

.page-about .cert__item {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 12px 14px;
  border: 1px solid var(--line-dark);
  background: transparent;
  min-width: 0;
  transition: border-color 180ms ease, background-color 180ms ease, transform 180ms ease;
}

.page-about .cert__item:hover,
.page-about .cert__item:focus-visible {
  border-color: var(--fluoro);
  background: rgba(201, 255, 63, 0.06);
  transform: translateY(-2px);
  outline: none;
}

.page-about .cert__name {
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--fluoro);
  line-height: 1.4;
}

.page-about .cert__note {
  font-size: 0.78rem;
  line-height: 1.65;
  color: var(--steel-light);
}

.page-about .about-trust__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 16px;
  margin-top: clamp(28px, 4vw, 40px);
}

/* ---------- 响应式 ---------- */

@media (min-width: 600px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-about .about-hero__figure {
    aspect-ratio: 4 / 5;
  }

  .page-about .about-sec__grid {
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 0 clamp(20px, 3vw, 40px);
  }

  .page-about .about-rail::before {
    left: 9px;
  }

  .page-about .about-rail__dot {
    width: 19px;
    height: 19px;
    top: calc(var(--header-h) + 40px);
  }

  .page-about .tl__item {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 0 clamp(28px, 4vw, 64px);
    align-items: start;
    border-bottom: 0;
    padding-bottom: 0;
  }

  .page-about .tl__item:nth-child(odd) .tl__year {
    grid-column: 1;
    grid-row: 1;
    text-align: right;
  }

  .page-about .tl__item:nth-child(odd) .tl__body {
    grid-column: 2;
    grid-row: 1;
  }

  .page-about .tl__item:nth-child(even) .tl__year {
    grid-column: 2;
    grid-row: 1;
    text-align: left;
  }

  .page-about .tl__item:nth-child(even) .tl__body {
    grid-column: 1;
    grid-row: 1;
  }

  .page-about .team {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-about .team__figure {
    aspect-ratio: 4 / 3;
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-about .partner {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 clamp(20px, 3vw, 36px);
    border-top: 1px solid var(--line-paper);
  }

  .page-about .partner__item {
    border-top: 2px solid var(--paper-ink);
    border-top-color: rgba(11, 31, 25, 0.35);
    padding-top: clamp(18px, 2.4vw, 26px);
    background: transparent;
  }

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

@media (min-width: 1120px) {
  .page-about .about-hero__title {
    font-size: clamp(3rem, 4.6vw, 4rem);
  }

  .page-about .path__step {
    grid-template-columns: 44px minmax(0, 1fr);
  }

  .page-about .cert {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl__note,
  .page-about .path__step,
  .page-about .path__idx,
  .page-about .cert__item {
    transition: none;
  }

  .page-about .cert__item:hover,
  .page-about .cert__item:focus-visible {
    transform: none;
  }
}
<<<END>>>