.page-about {
  --about-pad: clamp(56px, 8vw, 112px);
  --about-gap: clamp(22px, 3.4vw, 44px);
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--edge);
  background: var(--pitch);
}

.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.5;
}

.page-about .about-hero__scrim {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 80% at 12% 0%, rgba(90, 209, 192, 0.12), transparent 56%),
    linear-gradient(180deg, rgba(8, 19, 15, 0.52) 0%, rgba(8, 19, 15, 0.88) 58%, var(--pitch) 100%);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 2;
  padding-top: clamp(54px, 9vw, 118px);
  padding-bottom: clamp(46px, 7vw, 92px);
}

.page-about .crumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
}

.page-about .about-hero__eyebrow {
  margin: clamp(24px, 4vw, 48px) 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 16px 0 0;
  max-width: 20ch;
  font-size: var(--step-5);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--bone);
}

.page-about .about-hero__title::after {
  content: "";
  display: block;
  width: clamp(72px, 12vw, 148px);
  height: 6px;
  margin-top: 24px;
  background: var(--lime);
}

.page-about .about-hero__lede {
  margin: clamp(22px, 3vw, 34px) 0 0;
  max-width: 62ch;
  font-size: var(--step-1);
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(34px, 5vw, 60px);
  background: var(--edge);
  border: 1px solid var(--edge);
  border-radius: var(--r);
  overflow: hidden;
}

.page-about .about-hero__stat {
  padding: 18px 20px 20px;
  background: rgba(8, 19, 15, 0.78);
}

.page-about .about-hero__stat b {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.8vw, 34px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--amber);
}

.page-about .about-hero__stat span {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

/* ---------- 章节跳转 ---------- */
.page-about .about-jump {
  background: rgba(16, 36, 28, 0.5);
  border-bottom: 1px solid var(--edge);
}

.page-about .about-jump__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 0;
  padding: 15px 0;
}

.page-about .about-jump__list a {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 3px;
  transition: color var(--t), border-color var(--t);
}

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

/* ---------- 通用区块 ---------- */
.page-about .about-section {
  padding: var(--about-pad) 0;
}

.page-about .about-section--alt {
  background: linear-gradient(180deg, rgba(16, 36, 28, 0.9), rgba(8, 19, 15, 0.55));
  border-top: 1px solid var(--edge);
  border-bottom: 1px solid var(--edge);
}

.page-about .about-section .section-head {
  margin-bottom: var(--about-gap);
}

.page-about .about-section .section-head__title {
  color: var(--bone);
}

/* ---------- 四类内容 ---------- */
.page-about .about-pillars {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-pillar {
  padding: 24px 22px 28px;
  background: rgba(16, 36, 28, 0.58);
  border: 1px solid var(--edge);
  border-left: 3px solid var(--lime);
  border-radius: var(--r);
  transition: transform var(--t), border-color var(--t), background var(--t);
}

.page-about .about-pillar:hover {
  transform: translateY(-4px);
  background: rgba(16, 36, 28, 0.86);
  border-color: rgba(200, 255, 77, 0.55);
  border-left-color: var(--lime);
}

.page-about .about-pillar:nth-child(2) { border-left-color: var(--amber); }
.page-about .about-pillar:nth-child(3) { border-left-color: var(--cyan); }

.page-about .about-pillar__idx {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
  padding: 4px 10px;
  border: 1px solid var(--edge);
  border-radius: 999px;
}

.page-about .about-pillar h3 {
  margin: 16px 0 0;
  font-size: var(--step-1);
  line-height: 1.35;
  color: var(--bone);
}

.page-about .about-pillar p {
  margin: 12px 0 0;
  font-size: var(--step-0);
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-pillars__foot {
  margin: var(--about-gap) 0 0;
  padding-top: 22px;
  border-top: 1px solid var(--line-soft);
  max-width: 78ch;
  font-size: var(--step-0);
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 时间脊线 ---------- */
.page-about .about-rail {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-rail__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  padding: 26px 0;
  border-top: 1px solid var(--line-soft);
}

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

.page-about .about-rail__node {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.page-about .about-rail__seq {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--amber);
}

.page-about .about-rail__row--current .about-rail__seq {
  color: var(--lime);
}

.page-about .about-rail__era {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-about .about-rail__body h3 {
  margin: 0;
  font-size: var(--step-1);
  line-height: 1.4;
  color: var(--bone);
}

.page-about .about-rail__body p {
  margin: 12px 0 0;
  max-width: 66ch;
  font-size: var(--step-0);
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-rail__pin {
  display: inline-block;
  margin-bottom: 12px;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--pitch);
  background: var(--lime);
  border-radius: 999px;
}

/* ---------- 图文分栏 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}

.page-about .about-media img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border-radius: var(--r);
}

.page-about .about-split__body .section-head {
  margin-bottom: 22px;
}

.page-about .about-split__body > p {
  margin: 0 0 20px;
  font-size: var(--step-0);
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-list li {
  position: relative;
  padding-left: 24px;
  font-size: var(--step-0);
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 8px;
  height: 8px;
  background: var(--lime);
  border-radius: 2px;
}

.page-about .about-list strong {
  color: var(--bone);
  font-weight: 700;
}

.page-about .about-split__foot {
  margin: 24px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--amber);
}

.page-about .about-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 26px 0 0;
}

/* ---------- 荣誉 ---------- */
.page-about .about-honour {
  padding: clamp(28px, 4vw, 48px);
}

.page-about .about-honour__quote {
  margin: 0;
  max-width: 34ch;
  font-size: var(--step-2);
  font-weight: 900;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--bone);
}

.page-about .about-honour__quote::before {
  content: "";
  display: block;
  width: 40px;
  height: 4px;
  margin-bottom: 20px;
  background: var(--amber);
}

.page-about .about-honour__facts {
  list-style: none;
  margin: clamp(26px, 3.6vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--glass-line);
  border: 1px solid var(--glass-line);
  border-radius: var(--r);
  overflow: hidden;
}

.page-about .about-honour__facts li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 16px 18px;
  background: rgba(8, 19, 15, 0.66);
}

.page-about .about-honour__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .about-honour__val {
  font-size: var(--step-0);
  line-height: 1.7;
  color: var(--bone);
}

/* ---------- 看台之外 ---------- */
.page-about .about-beyond {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-beyond__item {
  padding: 24px 22px 26px;
  background: rgba(16, 36, 28, 0.5);
  border: 1px solid var(--edge);
  border-radius: var(--r);
  transition: transform var(--t), border-color var(--t);
}

.page-about .about-beyond__item:hover {
  transform: translateY(-4px);
  border-color: rgba(90, 209, 192, 0.5);
}

.page-about .about-beyond__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--amber);
  padding: 3px 9px;
  border: 1px solid rgba(255, 180, 84, 0.4);
  border-radius: 999px;
}

.page-about .about-beyond__item h3 {
  margin: 16px 0 0;
  font-size: var(--step-1);
  line-height: 1.35;
  color: var(--bone);
}

.page-about .about-beyond__item p {
  margin: 12px 0 0;
  font-size: var(--step-0);
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-tail {
  margin: var(--about-gap) 0 0;
  padding-top: 24px;
  border-top: 1px solid var(--line-soft);
  max-width: 76ch;
  font-size: var(--step-0);
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-tail a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(90, 209, 192, 0.4);
  transition: color var(--t), border-color var(--t);
}

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

/* ---------- 桌面增强 ---------- */
@media (min-width: 760px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-beyond {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-honour__facts li {
    grid-template-columns: 140px 1fr;
    gap: 18px;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-about .about-pillars {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-pillar:nth-child(1) { grid-column: 1 / 6; }
  .page-about .about-pillar:nth-child(2) { grid-column: 6 / 13; margin-top: 34px; }
  .page-about .about-pillar:nth-child(3) { grid-column: 1 / 8; }
  .page-about .about-pillar:nth-child(4) { grid-column: 8 / 13; margin-top: -22px; }

  .page-about .about-rail__row {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 0;
    padding: 36px 0;
  }

  .page-about .about-rail__node {
    display: block;
    padding-right: 34px;
    text-align: right;
  }

  .page-about .about-rail__seq {
    font-size: 38px;
  }

  .page-about .about-rail__era {
    display: block;
    margin-top: 10px;
  }

  .page-about .about-rail__body {
    padding-left: 36px;
    border-left: 1px solid var(--edge);
  }

  .page-about .about-rail__row--current .about-rail__body {
    border-left-color: rgba(200, 255, 77, 0.55);
  }
}

@media (min-width: 960px) {
  .page-about .about-split {
    grid-template-columns: 5fr 7fr;
    align-items: start;
    gap: clamp(34px, 4.6vw, 68px);
  }

  .page-about .about-split--flip {
    grid-template-columns: 7fr 5fr;
  }

  .page-about .about-media {
    margin: 8px 0 0;
  }
}
<<<END>>>