.page-about {
  background: var(--green-home);
  color: var(--ink);
  overflow-x: clip;
}

.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

.page-about .crumbs {
  padding: 18px 0 2px;
  font-size: 13px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: 8px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 26px;
}

.page-about .about-hero__lead {
  margin: 16px 0 0;
  max-width: 38em;
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(96px, 1fr));
  gap: 10px;
  margin: 26px 0 0;
  padding: 0;
}

.page-about .about-hero__facts > div {
  padding: 14px 12px;
  border: 1px solid var(--hair);
  border-radius: var(--r-md);
  background: var(--card2);
}

.page-about .about-hero__facts dt {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-about .about-hero__facts dd {
  margin: 8px 0 0;
  display: flex;
  align-items: baseline;
}

.page-about .about-hero__num {
  font-family: var(--mono);
  font-size: clamp(24px, 7vw, 34px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .about-hero__num--warm {
  color: var(--orange);
}

.page-about .about-hero__unit {
  margin-left: 4px;
  font-size: 13px;
  color: var(--muted);
}

.page-about .about-hero__media {
  margin: 0;
}

/* ---------- 段落标题组 ---------- */
.page-about .about-head {
  max-width: 40em;
  margin-bottom: 28px;
}

.page-about .about-head .lead {
  margin-top: 10px;
}

/* ---------- 年份轴 + 阶段卡 ---------- */
.page-about .about-trail__body {
  display: grid;
  gap: 22px;
}

.page-about .about-axis {
  position: relative;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 4px 2px 12px;
  margin: 0;
  scrollbar-width: none;
}

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

.page-about .about-axis__node {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 15px;
  border: 1px solid var(--hair);
  border-radius: var(--pill);
  background: var(--card2);
  color: var(--muted);
  font-size: 13px;
  text-decoration: none;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-about .about-axis__node:hover,
.page-about .about-axis__node:focus-visible {
  border-color: var(--hair-strong);
  background: var(--card);
  color: var(--ink);
}

.page-about .about-axis__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--dataline);
  flex: 0 0 auto;
}

.page-about .about-axis__node.is-done .about-axis__dot {
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(53, 242, 192, 0.14);
}

.page-about .about-axis__node.is-now .about-axis__dot {
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 138, 61, 0.16);
}

.page-about .about-axis__year {
  font-family: var(--mono);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink);
}

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

.page-about .about-stage {
  padding: 22px 20px;
  border: 1px solid var(--hair);
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, var(--card), var(--card2));
  scroll-margin-top: 100px;
  transition: border-color 0.3s var(--ease);
}

.page-about .about-stage:hover {
  border-color: var(--hair-strong);
}

.page-about .about-stage__no {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-stage__title {
  margin: 0 0 10px;
  font-size: clamp(20px, 5vw, 24px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.page-about .about-stage p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 版图 ---------- */
.page-about .about-map__grid {
  display: grid;
  gap: 24px;
}

.page-about .about-map__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-stat {
  padding: 18px 16px;
  border: 1px solid var(--hair);
  border-radius: var(--r-lg);
  background: var(--card2);
}

.page-about .about-stat__num {
  margin: 0;
  font-family: var(--mono);
  font-size: clamp(30px, 8vw, 44px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .about-stat__num--warm {
  color: var(--orange);
}

.page-about .about-stat__label {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .about-map__media {
  margin: 0;
}

.page-about .about-layers {
  margin-top: 30px;
}

.page-about .about-layers__title {
  margin: 0 0 14px;
  font-size: clamp(18px, 4.4vw, 22px);
  font-weight: 800;
  letter-spacing: -0.02em;
}

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

.page-about .about-layers__list li {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 12px;
  padding: 16px 0;
  border-top: 1px solid var(--hair);
}

.page-about .about-layers__list li:last-child {
  border-bottom: 1px solid var(--hair);
}

.page-about .about-layers__n {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .about-layers__list strong {
  display: block;
  font-size: 16px;
  font-weight: 800;
  margin-bottom: 4px;
}

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

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: 26px;
}

.page-about .about-team__media {
  margin: 24px 0 0;
}

.page-about .about-team__cards {
  display: grid;
  gap: 12px;
}

.page-about .about-team__card {
  padding: 18px 16px;
  border: 1px solid var(--hair);
  border-radius: var(--r-lg);
  background: var(--card2);
  color: var(--cyan);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.page-about .about-team__card:hover,
.page-about .about-team__card:focus-within {
  transform: translateY(-4px) scale(1.015);
  border-color: var(--hair-strong);
  background: var(--card);
}

.page-about .about-team__card h3 {
  margin: 12px 0 6px;
  font-size: 17px;
  font-weight: 800;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.page-about .about-team__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
  transition: color 0.3s var(--ease);
}

.page-about .about-team__card:hover p,
.page-about .about-team__card:focus-within p {
  color: var(--ink);
}

.page-about .about-team__icon {
  display: block;
  width: 34px;
  height: 34px;
}

.page-about .about-team__icon svg {
  width: 100%;
  height: 100%;
}

/* ---------- 维护日志 ---------- */
.page-about .about-log__box {
  display: grid;
  gap: 26px;
  padding: 26px 20px;
  border: 1px solid var(--hair);
  border-radius: var(--r-xl);
  background: var(--night);
}

.page-about .about-log__num {
  margin: 14px 0 0;
  font-family: var(--mono);
  font-size: clamp(56px, 18vw, 96px);
  font-weight: 800;
  line-height: 0.9;
  letter-spacing: -0.04em;
  color: var(--cyan);
}

.page-about .about-log__cap {
  margin: 14px 0 0;
  max-width: 22em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-log__list h2 {
  margin: 0;
  font-size: clamp(20px, 5vw, 26px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.page-about .about-log__intro {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

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

.page-about .about-log__list li {
  display: grid;
  gap: 8px;
  padding: 16px 0;
  border-top: 1px solid var(--hair);
}

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

.page-about .about-log__list li strong {
  color: var(--ink);
  font-weight: 800;
}

.page-about .about-log__more {
  margin: 18px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-log__more a,
.page-about .about-src__card a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 数据来源 ---------- */
.page-about .about-src__grid {
  display: grid;
  gap: 12px;
}

.page-about .about-src__card {
  padding: 20px 18px;
  border: 1px solid var(--hair);
  border-radius: var(--r-lg);
  background: var(--green-turf);
}

.page-about .about-src__card h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .about-src__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 收束 ---------- */
.page-about .about-close__box {
  padding: 26px 20px;
  border: 1px solid var(--hair-strong);
  border-radius: var(--r-xl);
  background: linear-gradient(150deg, rgba(53, 242, 192, 0.1), rgba(255, 255, 255, 0.03) 58%);
}

.page-about .about-close__list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-close__list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
}

.page-about .about-close__n {
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 800;
  color: var(--orange);
  line-height: 1.4;
}

.page-about .about-close__list h3 {
  margin: 0 0 4px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.01em;
}

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

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

/* ---------- 平板 ---------- */
@media (min-width: 620px) {
  .page-about .about-team__cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 720px) {
  .page-about .about-stages {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-stage:first-child {
    grid-column: span 2;
  }

  .page-about .about-log__box {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    gap: 34px;
    padding: 32px 28px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    align-items: center;
    gap: 40px;
  }

  .page-about .about-trail__body {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-axis {
    position: sticky;
    top: 104px;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    overflow: visible;
    padding: 2px 0;
  }

  .page-about .about-axis::before {
    content: "";
    position: absolute;
    left: 6px;
    top: 16px;
    bottom: 16px;
    width: 2px;
    border-radius: 2px;
    background: linear-gradient(180deg, var(--cyan) 0%, var(--dataline) 60%, rgba(255, 138, 61, 0.55) 100%);
  }

  .page-about .about-axis__node {
    display: grid;
    grid-template-columns: 14px minmax(0, 1fr);
    grid-template-areas:
      "dot year"
      "dot label";
    align-items: center;
    column-gap: 12px;
    row-gap: 2px;
    padding: 11px 0;
    border: 0;
    border-radius: 0;
    background: transparent;
  }

  .page-about .about-axis__node:hover,
  .page-about .about-axis__node:focus-visible {
    background: transparent;
  }

  .page-about .about-axis__dot {
    grid-area: dot;
    justify-self: center;
  }

  .page-about .about-axis__year {
    grid-area: year;
    font-size: 16px;
    line-height: 1.2;
  }

  .page-about .about-axis__label {
    grid-area: label;
    font-size: 12px;
    letter-spacing: 0.1em;
    color: var(--muted);
  }

  .page-about .about-map__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
    gap: 40px;
  }

  .page-about .about-layers__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 28px;
  }

  .page-about .about-layers__list li:last-child {
    border-bottom: 0;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    gap: 44px;
    align-items: start;
  }

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

  .page-about .about-close__box {
    padding: 36px 34px;
  }

  .page-about .about-close__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition: none !important;
    animation: none !important;
  }
}
<<<END>>>