.page-about {
  --about-rail: 208px;
  --about-gap: 22px;
  background: var(--bg);
  color: var(--white);
  padding-top: calc(var(--header-h) + 26px);
  padding-bottom: 76px;
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.page-about .about-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

/* ---------- 左侧章节索引 ---------- */
.page-about .about-rail {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}

.page-about .about-rail-title {
  margin: 0;
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-about .about-rail-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-rail-list a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  padding: 7px 11px;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  color: var(--mist);
  font-size: 13px;
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.page-about .about-rail-list a .mono {
  font-size: 11px;
  color: var(--lime);
}

.page-about .about-rail-list a:hover,
.page-about .about-rail-list a:focus-visible {
  color: var(--ink);
  background: var(--lime);
  border-color: var(--lime);
}

.page-about .about-rail-list a:hover .mono,
.page-about .about-rail-list a:focus-visible .mono {
  color: var(--ink);
}

.page-about .about-rail-note {
  display: none;
  margin: 0;
  font-size: 10px;
  line-height: 1.9;
  letter-spacing: .16em;
  color: var(--muted);
}

/* ---------- 右侧内容流 ---------- */
.page-about .about-stream {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 54px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.page-about .about-hero .breadcrumbs {
  margin-bottom: 20px;
}

.page-about .about-kicker {
  margin: 0 0 16px;
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-about h1 {
  margin: 0 0 20px;
  font-size: clamp(29px, 7vw, 60px);
  line-height: 1.08;
  font-weight: 900;
  letter-spacing: .015em;
  max-width: 20em;
  overflow-wrap: break-word;
}

.page-about .h1-break {
  display: inline;
}

.page-about .about-lede {
  margin: 0;
  max-width: 40em;
  color: var(--mist);
  font-size: 16px;
  line-height: 1.85;
  overflow-wrap: break-word;
}

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
  border: 2px solid var(--line);
  background: var(--line);
}

.page-about .about-figures li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px;
  background: var(--panel);
  min-width: 0;
}

.page-about .fig-num {
  font-size: clamp(22px, 5vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}

.page-about .fig-plus {
  font-size: .6em;
  vertical-align: super;
  margin-left: 2px;
}

.page-about .fig-label {
  font-size: 12px;
  line-height: 1.55;
  color: var(--muted);
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 22px;
  padding-top: 8px;
  border-top: 2px solid var(--line);
}

.page-about .about-section--panel {
  padding: 26px 18px 30px;
  border: 2px solid var(--line);
  border-top-width: 6px;
  background:
    repeating-linear-gradient(
      90deg,
      rgba(47, 90, 75, .18) 0 1px,
      transparent 1px 68px
    ),
    var(--panel);
}

.page-about .sec-head {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .sec-no {
  display: block;
  font-size: clamp(32px, 9vw, 68px);
  line-height: 1;
  font-weight: 700;
  letter-spacing: .04em;
  color: transparent;
  -webkit-text-stroke: 1.4px var(--line);
}

.page-about .sec-head h2 {
  margin: 0;
  font-size: clamp(22px, 4.6vw, 36px);
  line-height: 1.24;
  font-weight: 800;
  letter-spacing: .02em;
  overflow-wrap: break-word;
}

.page-about .sec-lede {
  margin: 0;
  max-width: 40em;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.85;
}

/* ---------- 01 起点 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

.page-about .about-split-main p {
  margin: 0 0 15px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--white);
  max-width: 40em;
}

.page-about .about-split-main p:last-of-type {
  margin-bottom: 0;
}

.page-about .about-facts {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 2px solid var(--line);
}

.page-about .about-facts li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .about-facts .mono {
  flex: 0 0 auto;
  min-width: 62px;
  color: var(--lime);
  font-size: 13px;
  font-weight: 700;
}

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

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

.page-about .about-wide {
  margin: 4px 0 0;
}

.page-about .about-wide .media-caption {
  margin-top: 10px;
  display: block;
}

/* ---------- 02 每日校准 ---------- */
.page-about .cal-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
  border-left: 2px solid var(--line);
}

.page-about .cal-list li {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 16px 0 16px 20px;
  border-bottom: 1px solid var(--line);
}

.page-about .cal-list li::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 24px;
  width: 12px;
  height: 12px;
  background: var(--lime);
  border: 2px solid var(--bg);
  border-radius: 50%;
}

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

.page-about .cal-list li:last-child::before {
  background: var(--orange);
}

.page-about .cal-time {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--lime);
}

.page-about .cal-list li:last-child .cal-time {
  color: var(--orange);
}

.page-about .cal-body h3 {
  margin: 0 0 5px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: .02em;
}

.page-about .cal-body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
  max-width: 40em;
}

/* ---------- 03 三条内容线 ---------- */
.page-about .line-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .line-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 18px 18px;
  background: var(--panel);
  border: 2px solid var(--line);
  border-top: 6px solid var(--lime);
  box-shadow: var(--shadow-hard);
  transition: transform .25s var(--ease), border-color .25s var(--ease);
  min-width: 0;
}

.page-about .line-card--alert {
  border-top-color: var(--orange);
}

.page-about .line-card--mist {
  border-top-color: var(--mist);
}

.page-about .line-card:hover,
.page-about .line-card:focus-within {
  transform: translate(-3px, -3px);
  border-color: var(--lime);
}

.page-about .line-card--alert:hover,
.page-about .line-card--alert:focus-within {
  border-color: var(--orange);
}

.page-about .line-card--mist:hover,
.page-about .line-card--mist:focus-within {
  border-color: var(--mist);
}

.page-about .line-kicker {
  margin: 0;
  font-size: 10.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .line-card h3 {
  margin: 0;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: .02em;
}

.page-about .line-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .line-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .line-list li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--white);
}

.page-about .line-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 2px;
  background: var(--lime);
}

.page-about .line-card--alert .line-list li::before {
  background: var(--orange);
}

.page-about .line-card--mist .line-list li::before {
  background: var(--mist);
}

.page-about .line-link {
  margin-top: 4px;
  align-self: flex-start;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--lime);
  text-decoration: none;
  border-bottom: 2px solid var(--line);
  padding-bottom: 2px;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.page-about .line-link:hover,
.page-about .line-link:focus-visible {
  border-color: var(--lime);
}

.page-about .line-card--alert .line-link {
  color: var(--orange);
}

.page-about .line-card--alert .line-link:hover,
.page-about .line-card--alert .line-link:focus-visible {
  border-color: var(--orange);
}

/* ---------- 04 团队 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
  background: var(--line);
  border: 2px solid var(--line);
}

.page-about .team-block {
  padding: 20px 18px;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.page-about .team-count {
  margin: 0;
  font-size: clamp(26px, 5.5vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
  letter-spacing: .01em;
  overflow-wrap: break-word;
}

.page-about .team-mono-note {
  margin: 0;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--orange);
}

.page-about .team-block h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: .02em;
}

.page-about .team-block p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-wide--dark .media-frame {
  box-shadow: none;
}

/* ---------- 05 合作生态 ---------- */
.page-about .partner-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  padding: 22px 18px;
  border: 2px solid var(--line);
  background: var(--panel);
}

.page-about .partner-hub {
  display: flex;
  flex-direction: column;
  gap: 4px;
  border-left: 6px solid var(--lime);
  padding-left: 16px;
}

.page-about .partner-hub-num {
  margin: 0;
  font-size: clamp(40px, 11vw, 66px);
  line-height: 1;
  font-weight: 700;
  color: var(--lime);
}

.page-about .partner-hub-label {
  margin: 0;
  font-size: 13px;
  color: var(--mist);
  line-height: 1.6;
}

.page-about .partner-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-content: flex-start;
}

.page-about .partner-tags .tag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 11px;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  color: var(--mist);
  font-size: 12.5px;
  line-height: 1.4;
}

.page-about .partner-tags .tag b {
  color: var(--lime);
  font-size: 13px;
}

.page-about .partner-tags .tag--lime {
  border-color: var(--lime);
  color: var(--lime);
}

.page-about .partner-notes {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin-top: 6px;
}

.page-about .partner-notes > div {
  border-top: 2px solid var(--line);
  padding-top: 12px;
}

.page-about .partner-notes h3 {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: .03em;
  color: var(--white);
}

.page-about .partner-notes p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 06 时间线 ---------- */
.page-about .tl {
  margin: 0;
  padding: 0 0 0 18px;
  list-style: none;
  border-left: 2px solid var(--line);
}

.page-about .tl-item {
  position: relative;
  padding: 0 0 14px;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 10px;
  width: 12px;
  height: 12px;
  background: var(--panel);
  border: 2px solid var(--lime);
  border-radius: 50%;
}

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

.page-about .tl-item details {
  border: 2px solid var(--line);
  background: var(--bg);
}

.page-about .tl-item details[open] {
  border-color: var(--lime);
}

.page-about .tl-item summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 13px 15px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .tl-year {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--lime);
  min-width: 56px;
}

.page-about .tl-head {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: .02em;
  color: var(--white);
}

.page-about .tl-item summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--mist);
  line-height: 1;
}

.page-about .tl-item details[open] summary::after {
  content: "−";
  color: var(--lime);
}

.page-about .tl-text {
  margin: 0;
  padding: 0 15px 15px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
  max-width: 42em;
}

/* ---------- 07 结果 ---------- */
.page-about .result-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .result-card {
  padding: 18px 16px 16px;
  border: 2px solid var(--line);
  background: var(--panel);
  display: flex;
  flex-direction: column;
  gap: 7px;
  min-width: 0;
}

.page-about .result-num {
  margin: 0;
  font-size: clamp(30px, 8vw, 46px);
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
  letter-spacing: .01em;
}

.page-about .result-unit {
  font-size: .42em;
  margin-left: 4px;
  color: var(--mist);
  font-weight: 600;
}

.page-about .result-card h3 {
  margin: 0;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: .02em;
  color: var(--white);
}

.page-about .result-card p {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 收尾入口 ---------- */
.page-about .about-next {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 26px 18px 28px;
  border: 2px solid var(--lime);
  background: var(--panel);
}

.page-about .about-next h2 {
  margin: 0;
  font-size: clamp(21px, 4.4vw, 30px);
  font-weight: 800;
  letter-spacing: .02em;
}

.page-about .about-next > p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
  max-width: 38em;
}

.page-about .next-links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin-top: 6px;
}

.page-about .next-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 15px;
  border: 2px solid var(--line);
  background: var(--bg);
  color: var(--white);
  text-decoration: none;
  transition: border-color .2s var(--ease), transform .2s var(--ease);
}

.page-about .next-card .mono {
  font-size: 13px;
  color: var(--lime);
}

.page-about .next-card strong {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: .02em;
}

.page-about .next-card span:last-child {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .next-card:hover,
.page-about .next-card:focus-visible {
  border-color: var(--lime);
  transform: translateY(-2px);
}

/* ---------- 动效 ---------- */
.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .42s var(--ease), transform .42s var(--ease);
}

.page-about [data-reveal="in"] {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .page-about .line-card,
  .page-about .next-card {
    transition: none;
  }
}

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

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

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

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

  .page-about .cal-list li {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 16px;
    align-items: start;
  }

  .page-about .cal-time {
    padding-top: 2px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-about {
    padding-bottom: 96px;
  }

  .page-about .about-shell {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 26px);
    align-self: start;
    flex-direction: column;
    gap: 14px;
  }

  .page-about .about-rail-list {
    flex-direction: column;
    overflow: visible;
    gap: 0;
    border-top: 2px solid var(--line);
    padding: 0;
  }

  .page-about .about-rail-list li {
    border-bottom: 1px solid var(--line);
  }

  .page-about .about-rail-list a {
    display: flex;
    justify-content: flex-start;
    width: 100%;
    padding: 11px 2px;
    border: 0;
    border-radius: 0;
    background: transparent;
    font-size: 14px;
  }

  .page-about .about-rail-list a .mono {
    min-width: 26px;
  }

  .page-about .about-rail-list a:hover,
  .page-about .about-rail-list a:focus-visible {
    background: transparent;
    color: var(--lime);
    border-color: transparent;
    padding-left: 10px;
  }

  .page-about .about-rail-list a:hover .mono,
  .page-about .about-rail-list a:focus-visible .mono {
    color: var(--lime);
  }

  .page-about .about-rail-note {
    display: block;
  }

  .page-about .about-stream {
    gap: 76px;
  }

  .page-about .h1-break {
    display: block;
  }

  .page-about .about-lede {
    font-size: 17px;
  }

  .page-about .about-split--7-5 {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 38px;
    align-items: start;
  }

  .page-about .line-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

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

  .page-about .partner-wrap {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 32px;
    align-items: center;
    padding: 30px 28px;
  }

  .page-about .about-section--panel {
    padding: 34px 30px 38px;
  }

  .page-about .result-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .next-links {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-next {
    padding: 34px 30px 36px;
  }

  .page-about .cal-list {
    border-left-width: 2px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-stream {
    gap: 88px;
  }

  .page-about .about-lede {
    max-width: 36em;
  }
}
<<<END>>>