.page-about {
  --about-cut: 20px;
}

.page-about .about-wrap {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}

.page-about img {
  max-width: 100%;
}

.page-about h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 4.8vw, 40px);
  line-height: 1.18;
  letter-spacing: -0.005em;
  color: var(--ice);
  margin: 8px 0 0;
}

.page-about h3 {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: clamp(17px, 2.6vw, 21px);
  line-height: 1.4;
  color: var(--ice);
  margin: 0 0 8px;
}

.page-about .section-head {
  max-width: 760px;
  margin-bottom: clamp(22px, 4vw, 40px);
}

.page-about .prose {
  margin: 0 0 16px;
  line-height: 1.78;
}

.page-about .prose + .btn {
  margin-top: 8px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: clamp(16px, 3vw, 28px);
  padding-block: clamp(16px, 3vw, 32px) clamp(38px, 6.5vw, 84px);
}

.page-about .about-hero-scale {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-about .scale-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--mint), rgba(47, 243, 210, 0));
}

.page-about .about-hero-copy h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(32px, 7.6vw, 64px);
  line-height: 1.1;
  letter-spacing: -0.012em;
  color: var(--ice);
  margin: 10px 0 0;
  max-width: 17ch;
}

.page-about .about-hero-copy .lede {
  margin: clamp(14px, 2.4vw, 20px) 0 0;
  font-size: clamp(16px, 2.2vw, 18px);
  line-height: 1.78;
  color: var(--mist);
  max-width: 54ch;
}

.page-about .hero-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: clamp(22px, 3.4vw, 34px);
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.page-about .meta-cell {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-about .meta-num {
  font-family: var(--font-mono);
  font-size: clamp(17px, 3.4vw, 26px);
  font-weight: 700;
  line-height: 1.15;
  color: var(--amber);
  letter-spacing: -0.02em;
}

.page-about .meta-label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--mist);
}

.page-about .about-hero-figure {
  margin: 0;
  background: var(--trench);
  border: 1px solid var(--line);
  border-radius: var(--about-cut) var(--about-cut) 0 var(--about-cut);
  overflow: hidden;
}

.page-about .about-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-hero-figure figcaption {
  padding: 10px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
  border-top: 1px solid var(--line);
}

/* ---------- 内容主张 ---------- */
.page-about .claim-grid {
  display: grid;
  gap: clamp(22px, 3.6vw, 44px);
}

.page-about .claim-copy .eyebrow {
  margin-bottom: 4px;
}

.page-about .claim-copy .prose {
  color: var(--foam);
  max-width: 56ch;
}

.page-about .exhibit {
  position: relative;
  padding: clamp(18px, 3vw, 28px);
  background: linear-gradient(160deg, var(--indigo), rgba(10, 53, 64, 0.9));
  border: 1px solid var(--line);
  border-radius: 0 var(--about-cut) var(--about-cut) var(--about-cut);
}

.page-about .exhibit::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 46px;
  height: 2px;
  background: var(--mint);
}

.page-about .exhibit-title {
  margin: 0 0 14px;
  font-family: var(--font-editorial);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--mint);
}

.page-about .exhibit-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .exhibit-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .exhibit-row:last-child {
  border-bottom: 0;
}

.page-about .exhibit-key {
  font-size: 14px;
  color: var(--mist);
}

.page-about .exhibit-val {
  font-family: var(--font-mono);
  font-size: clamp(18px, 3.2vw, 22px);
  font-weight: 700;
  color: var(--amber);
  white-space: nowrap;
}

.page-about .exhibit-note {
  margin: 14px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 团队与流程 ---------- */
.page-about .team-tablist {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 10px;
  margin-bottom: 18px;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-tabs .tab {
  flex: 0 0 auto;
  appearance: none;
  cursor: pointer;
  padding: 9px 16px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  color: var(--mist);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  transition: background 240ms var(--ease), color 240ms var(--ease), border-color 240ms var(--ease);
}

.page-about .about-tabs .tab[aria-selected="true"] {
  color: var(--deep);
  background: var(--mint);
  border-color: var(--mint);
  font-weight: 700;
}

.page-about .about-tabs .tab:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
}

.page-about .team-panel {
  padding: clamp(18px, 3vw, 26px);
  background: rgba(24, 28, 69, 0.55);
  border-left: 2px solid var(--mint);
  border-radius: 0 var(--about-cut) var(--about-cut) 0;
}

.page-about .team-panel p {
  margin: 0 0 12px;
  max-width: 62ch;
  line-height: 1.78;
  color: var(--foam);
}

.page-about .team-out {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--amber);
}

.page-about .about-team-figure {
  margin: clamp(22px, 4vw, 38px) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--about-cut) 0 var(--about-cut) var(--about-cut);
  overflow: hidden;
  background: var(--trench);
}

.page-about .about-team-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-about .about-team-figure figcaption {
  padding: 10px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
  border-top: 1px solid var(--line);
}

.page-about .flow-block {
  margin-top: clamp(28px, 5vw, 52px);
}

.page-about .flow-block h3 {
  margin-bottom: 18px;
}

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

.page-about .flow-item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 2px 10px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

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

.page-about .flow-num {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--amber);
  padding-top: 3px;
}

.page-about .flow-name {
  font-weight: 700;
  color: var(--ice);
  font-size: 15px;
}

.page-about .flow-desc {
  margin: 4px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- v2.6 三条主线 ---------- */
.page-about .line-grid {
  display: grid;
  gap: 14px;
}

.page-about .line-card {
  padding: clamp(18px, 3vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--about-cut) 0 var(--about-cut) var(--about-cut);
  background: rgba(10, 53, 64, 0.62);
}

.page-about .line-card--wide {
  background: linear-gradient(135deg, rgba(47, 243, 210, 0.13), rgba(24, 28, 69, 0.5));
  border-color: rgba(47, 243, 210, 0.35);
}

.page-about .line-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--mint);
  margin-bottom: 10px;
}

.page-about .line-card h3 {
  margin-bottom: 10px;
}

.page-about .line-card p {
  margin: 0;
  line-height: 1.78;
  color: var(--foam);
  max-width: 62ch;
}

.page-about .line-meta {
  margin-top: 12px;
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--mist);
}

.page-about .line-link {
  display: inline-block;
  margin-top: 14px;
  font-size: 14px;
  font-weight: 700;
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 243, 210, 0.45);
  padding-bottom: 2px;
}

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

/* ---------- 赛季时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  overflow: hidden;
}

.page-about .tl-rail {
  position: absolute;
  top: 0;
  right: 0;
  height: 100%;
  width: 200px;
  opacity: 0.5;
  pointer-events: none;
}

.page-about .about-timeline .about-wrap {
  position: relative;
  z-index: 1;
}

.page-about .tl-tablist {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
}

.page-about .tl-tab {
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: flex-start;
  appearance: none;
  cursor: pointer;
  padding: 12px 14px;
  text-align: left;
  background: transparent;
  color: var(--mist);
  border: 1px solid var(--line);
  border-radius: var(--about-cut) var(--about-cut) 0 0;
  transition: background 240ms var(--ease), border-color 240ms var(--ease);
}

.page-about .tl-tab[aria-selected="true"] {
  background: var(--trench);
  border-color: var(--mint);
}

.page-about .tl-tab:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
}

.page-about .tl-year {
  font-family: var(--font-mono);
  font-size: clamp(19px, 4vw, 30px);
  font-weight: 700;
  line-height: 1;
  color: var(--mist);
  letter-spacing: -0.01em;
}

.page-about .tl-tab[aria-selected="true"] .tl-year {
  color: var(--mint);
}

.page-about .tl-sub {
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-about .tl-points {
  list-style: none;
  margin: 0;
  padding: 4px 0 4px 22px;
  border-left: 1px solid var(--line);
  display: grid;
  gap: 22px;
}

.page-about .tl-point {
  position: relative;
  display: grid;
  grid-template-columns: minmax(48px, auto) minmax(0, 1fr);
  gap: 4px 16px;
  align-items: baseline;
}

.page-about .tl-point::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 4px rgba(47, 243, 210, 0.16);
}

.page-about .tl-num {
  font-family: var(--font-mono);
  font-size: clamp(20px, 3.6vw, 26px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--amber);
  white-space: nowrap;
}

.page-about .tl-num.identity {
  color: var(--mint);
  font-size: clamp(15px, 2.4vw, 18px);
}

.page-about .tl-point b {
  display: block;
  color: var(--ice);
  font-size: 15px;
  margin-bottom: 4px;
}

.page-about .tl-point p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
  max-width: 58ch;
}

.page-about .tl-figure {
  margin: clamp(24px, 4vw, 40px) 0 0;
  border: 1px solid var(--line);
  border-radius: 0 var(--about-cut) var(--about-cut) var(--about-cut);
  overflow: hidden;
  background: var(--trench);
}

.page-about .tl-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

.page-about .tl-figure figcaption {
  padding: 10px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
  border-top: 1px solid var(--line);
}

/* ---------- 协作网络 ---------- */
.page-about .net-grid {
  display: grid;
  gap: 12px;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .net-card {
  padding: 18px;
  background: rgba(4, 24, 38, 0.42);
  border: 1px solid rgba(242, 250, 248, 0.18);
  border-radius: 0 var(--about-cut) var(--about-cut) var(--about-cut);
}

.page-about .net-stat {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(18px, 3.2vw, 24px);
  font-weight: 700;
  color: var(--amber);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.page-about .net-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--foam);
}

.page-about .about-faq .accordion-item {
  border-top: 1px solid rgba(242, 250, 248, 0.2);
}

.page-about .about-faq .accordion-item:last-child {
  border-bottom: 1px solid rgba(242, 250, 248, 0.2);
}

.page-about .accordion-h {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-about .about-faq .accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 15px 2px;
  text-align: left;
  cursor: pointer;
  background: transparent;
  border: 0;
  color: var(--ice);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
}

.page-about .about-faq .accordion-trigger::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--mint);
}

.page-about .about-faq .accordion-trigger[aria-expanded="true"]::after {
  content: "–";
  color: var(--orange);
}

.page-about .about-faq .accordion-trigger:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

.page-about .about-faq .accordion-panel p {
  margin: 0;
  padding: 0 2px 18px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--foam);
  max-width: 62ch;
}

/* ---------- 尾部行动 ---------- */
.page-about .cta-inner {
  display: grid;
  gap: clamp(20px, 3.4vw, 36px);
}

.page-about .cta-inner .prose {
  max-width: 56ch;
  color: var(--mist);
}

.page-about .cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.page-about .cta-textlink {
  font-size: 14px;
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 243, 210, 0.4);
  padding-bottom: 2px;
}

.page-about .cta-textlink:hover,
.page-about .cta-textlink:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .net-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .flow-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 28px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: 84px minmax(0, 1.05fr) minmax(0, 0.92fr);
    align-items: start;
    column-gap: clamp(20px, 3vw, 40px);
  }

  .page-about .about-hero-scale {
    flex-direction: column;
    align-items: flex-start;
    justify-content: space-between;
    height: 100%;
    min-height: 300px;
    padding-top: 8px;
  }

  .page-about .scale-line {
    width: 1px;
    height: auto;
    flex: 1;
    background: linear-gradient(180deg, var(--mint), rgba(47, 243, 210, 0));
  }

  .page-about .about-hero-copy {
    padding-top: clamp(6px, 2vw, 26px);
  }

  .page-about .about-hero-figure {
    margin-top: clamp(28px, 6vw, 76px);
  }

  .page-about .claim-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: start;
  }

  .page-about .exhibit {
    margin-top: clamp(0px, 2vw, 20px);
  }

  .page-about .about-team-figure {
    margin-top: clamp(26px, 4vw, 44px);
  }

  .page-about .line-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .line-card--wide {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    column-gap: 28px;
    align-items: start;
  }

  .page-about .line-card--wide .line-num {
    grid-row: 1 / span 3;
    margin-bottom: 0;
    padding-top: 6px;
  }

  .page-about .cta-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
  }

  .page-about .cta-row {
    justify-content: flex-end;
  }
}

@media (min-width: 1100px) {
  .page-about .flow-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .tl-points {
    padding-left: 30px;
    gap: 26px;
  }

  .page-about .tl-point::before {
    left: -35px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tab,
  .page-about .tl-tab {
    transition: none;
  }
}
<<<END>>>