.page-about {
  --about-gap: clamp(24px, 3.2vw, 44px);
  --about-indent: clamp(0px, 4.5vw, 64px);
  --about-rule: rgba(0, 229, 255, 0.28);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding: clamp(18px, 2.6vw, 34px) 0 clamp(40px, 6vw, 80px);
}

.page-about .crumb {
  margin-bottom: clamp(16px, 2.4vw, 28px);
}

.page-about .about-hero-frame {
  padding: clamp(24px, 4vw, 56px);
  background:
    linear-gradient(132deg, rgba(0, 229, 255, 0.08), rgba(11, 30, 58, 0) 58%),
    var(--c-mid);
}

.page-about .about-hero-frame .eyebrow {
  margin: 0 0 clamp(14px, 2vw, 22px);
}

.page-about .about-hero-frame h1 {
  margin: 0;
  font-family: var(--ff-display);
  font-weight: 800;
  font-size: clamp(2rem, 5.4vw, 4.2rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--c-ice);
  max-width: 20ch;
}

.page-about .about-hero-frame .lede {
  margin: clamp(16px, 2.2vw, 26px) 0 0;
  max-width: 62ch;
  color: var(--c-steel);
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(26px, 3.4vw, 44px) 0 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .hero-stat {
  background: var(--c-deep);
  padding: 16px 18px;
}

.page-about .hero-stat dt {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--c-steel);
}

.page-about .hero-stat dd {
  display: block;
  margin: 8px 0 0;
  font-family: var(--ff-mono);
  font-size: clamp(1.5rem, 3.2vw, 2.35rem);
  letter-spacing: 0.02em;
  color: var(--c-cyan);
  line-height: 1;
}

@media (min-width: 720px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 左右分屏骨架 ---------- */

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

@media (min-width: 960px) {
  .page-about .about-track {
    grid-template-columns: minmax(170px, 3fr) minmax(0, 8.5fr);
    gap: clamp(32px, 5vw, 96px);
    align-items: start;
  }

  .page-about .timeline {
    position: sticky;
    top: calc(var(--header-h) + 32px);
  }
}

/* ---------- 左侧赛季时间带 ---------- */

.page-about .timeline-title {
  margin: 0 0 16px;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--c-steel);
}

.page-about .timeline-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .timeline-list > li {
  position: relative;
  border-left: 1px solid var(--line);
}

.page-about .timeline-list > li::before {
  content: "";
  position: absolute;
  left: -3.5px;
  top: 20px;
  width: 7px;
  height: 7px;
  background: var(--c-deep);
  border: 1px solid var(--c-steel);
  transform: rotate(45deg);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .timeline-list > li:hover::before,
.page-about .timeline-list > li:focus-within::before {
  background: var(--c-cyan);
  border-color: var(--c-cyan);
  transform: rotate(45deg) scale(1.3);
}

.page-about .timeline-node {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "code season"
    "code label";
  gap: 2px 10px;
  padding: 10px 12px 12px 18px;
  text-decoration: none;
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .timeline-node:hover,
.page-about .timeline-node:focus-visible {
  background: rgba(0, 229, 255, 0.07);
  transform: translateX(4px);
}

.page-about .timeline-node:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 2px;
}

.page-about .node-code {
  grid-area: code;
  font-family: var(--ff-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  line-height: 1.7;
  color: var(--c-steel);
}

.page-about .node-season {
  grid-area: season;
  font-family: var(--ff-mono);
  font-size: 1rem;
  letter-spacing: 0.02em;
  color: var(--c-ice);
  transition: color var(--dur) var(--ease);
}

.page-about .node-label {
  grid-area: label;
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--c-steel);
}

.page-about .timeline-node:hover .node-season,
.page-about .timeline-node:focus-visible .node-season {
  color: var(--c-cyan);
}

@media (max-width: 959px) {
  .page-about .timeline-list {
    display: flex;
    grid-template-columns: none;
    gap: 0;
    overflow-x: auto;
    padding-bottom: 8px;
    scrollbar-width: thin;
    -webkit-overflow-scrolling: touch;
  }

  .page-about .timeline-list > li {
    flex: 0 0 auto;
    min-width: 152px;
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .page-about .timeline-list > li::before {
    left: 14px;
    top: -3.5px;
  }

  .page-about .timeline-node {
    padding: 16px 16px 12px 14px;
  }

  .page-about .timeline-node:hover,
  .page-about .timeline-node:focus-visible {
    transform: translateY(2px);
  }
}

/* ---------- 右侧章节 ---------- */

.page-about .about-chapters {
  display: grid;
  gap: clamp(52px, 7vw, 104px);
}

.page-about .chapter {
  position: relative;
  scroll-margin-top: calc(var(--header-h) + 28px);
}

@media (min-width: 960px) {
  .page-about .chapter:nth-child(even) {
    padding-left: var(--about-indent);
  }
}

.page-about .chapter-code {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-family: var(--ff-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  color: var(--c-cyan);
}

.page-about .chapter-code::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--about-rule);
}

.page-about .chapter-title {
  margin: 0 0 clamp(16px, 2.2vw, 26px);
  font-family: var(--ff-display);
  font-weight: 800;
  font-size: clamp(1.55rem, 3.5vw, 2.6rem);
  line-height: 1.16;
  letter-spacing: -0.018em;
  color: var(--c-ice);
  max-width: 22ch;
  transition: color var(--dur) var(--ease);
}

.page-about .chapter:target .chapter-title {
  color: var(--c-cyan);
}

.page-about .chapter .prose {
  max-width: 68ch;
}

/* ---------- 三条服务线 ---------- */

.page-about .service-lines {
  display: grid;
  gap: 1px;
  margin: clamp(22px, 3vw, 34px) 0;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 780px) {
  .page-about .service-lines {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .service-line {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--c-deep);
  border-top: 2px solid transparent;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .service-line:hover {
  background: var(--c-mid);
  border-top-color: var(--c-cyan);
  transform: translateY(-2px);
}

.page-about .line-idx {
  font-family: var(--ff-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--c-cyan);
}

.page-about .service-line h3 {
  margin: 0;
  font-family: var(--ff-display);
  font-size: clamp(1.02rem, 1.6vw, 1.25rem);
  font-weight: 700;
  line-height: 1.35;
  color: var(--c-ice);
}

.page-about .service-line p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.72;
  color: var(--c-steel);
}

/* ---------- 图片 ---------- */

.page-about .chapter-figure {
  margin: clamp(28px, 4vw, 46px) 0 0;
}

.page-about .chapter-figure .media {
  border: 1px solid var(--line);
}

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

.page-about .chapter-figure .media-caption {
  display: block;
  margin-top: 12px;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--c-steel);
}

.page-about .ridge-banner {
  margin-top: clamp(34px, 5vw, 56px);
}

/* ---------- 协作网络 ---------- */

.page-about .eco-map {
  display: grid;
  gap: 0;
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .eco-hub {
  display: grid;
  gap: 6px;
  align-content: center;
  padding: 20px;
  border: 1px solid var(--line-cyan);
  background:
    linear-gradient(150deg, rgba(0, 229, 255, 0.12), rgba(11, 30, 58, 0) 72%),
    var(--c-mid);
}

.page-about .eco-hub-label {
  font-family: var(--ff-display);
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  color: var(--c-ice);
}

.page-about .eco-hub-meta {
  font-family: var(--ff-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--c-cyan);
}

.page-about .eco-branches {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .eco-branch {
  position: relative;
  background: var(--c-deep);
  padding: clamp(14px, 2vw, 20px) clamp(16px, 2vw, 24px) clamp(14px, 2vw, 20px) clamp(30px, 3.4vw, 44px);
  transition: background var(--dur) var(--ease);
}

.page-about .eco-branch::before {
  content: "";
  position: absolute;
  left: clamp(12px, 1.6vw, 20px);
  top: clamp(24px, 3vw, 32px);
  width: 6px;
  height: 6px;
  border: 1px solid var(--c-teal);
  transform: rotate(45deg);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .eco-branch:hover {
  background: var(--c-mid);
}

.page-about .eco-branch:hover::before {
  background: var(--c-cyan);
  border-color: var(--c-cyan);
}

.page-about .eco-branch h3 {
  margin: 0 0 6px;
  font-family: var(--ff-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-ice);
}

.page-about .eco-branch p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.72;
  color: var(--c-steel);
}

@media (min-width: 880px) {
  .page-about .eco-map {
    grid-template-columns: minmax(160px, 3fr) minmax(0, 9fr);
    gap: clamp(24px, 3vw, 48px);
    align-items: stretch;
  }

  .page-about .eco-branches {
    position: relative;
  }

  .page-about .eco-branches::before {
    content: "";
    position: absolute;
    left: calc(-1 * clamp(24px, 3vw, 48px));
    top: 0;
    bottom: 0;
    width: clamp(24px, 3vw, 48px);
    border-top: 1px solid var(--about-rule);
    border-left: 1px solid var(--about-rule);
    border-bottom: 1px solid var(--about-rule);
    pointer-events: none;
  }
}

/* ---------- 赛事品类 ---------- */

.page-about .sport-chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: clamp(20px, 2.8vw, 30px) 0 clamp(22px, 3vw, 34px);
  padding: 0;
}

.page-about .sport-chips li {
  padding: 7px 14px;
  border: 1px solid var(--line);
  background: var(--c-mid);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--c-ice);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .sport-chips li:hover {
  border-color: var(--c-cyan);
  color: var(--c-cyan);
}

.page-about .tier-list {
  list-style: none;
  display: grid;
  gap: 1px;
  margin: 0 0 clamp(22px, 3vw, 34px);
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .tier {
  display: grid;
  gap: 6px 24px;
  padding: 16px clamp(16px, 2vw, 24px);
  background: var(--c-deep);
  transition: background var(--dur) var(--ease);
}

.page-about .tier:hover {
  background: var(--c-mid);
}

@media (min-width: 680px) {
  .page-about .tier {
    grid-template-columns: minmax(140px, 3fr) minmax(0, 9fr);
    align-items: baseline;
  }
}

.page-about .tier-name {
  margin: 0;
  font-family: var(--ff-display);
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--c-ice);
}

.page-about .tier-desc {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.72;
  color: var(--c-steel);
}

/* ---------- 用心服务 ---------- */

.page-about .care-list {
  list-style: none;
  display: grid;
  gap: clamp(18px, 2.4vw, 30px);
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
}

@media (min-width: 720px) {
  .page-about .care-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(24px, 4.5vw, 60px);
  }
}

.page-about .care-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 14px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.page-about .care-idx {
  grid-row: span 2;
  padding-top: 2px;
  font-family: var(--ff-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  color: var(--c-cyan);
}

.page-about .care-item h3 {
  margin: 0;
  font-family: var(--ff-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-ice);
}

.page-about .care-item p {
  grid-column: 2;
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.72;
  color: var(--c-steel);
}

/* ---------- 收尾 ---------- */

.page-about .about-next {
  padding-top: clamp(24px, 3.4vw, 48px);
}

.page-about .about-cta {
  display: grid;
  gap: clamp(22px, 3vw, 36px);
  padding-top: clamp(28px, 4vw, 48px);
  border-top: 1px solid var(--line);
}

@media (min-width: 880px) {
  .page-about .about-cta {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }
}

.page-about .about-cta .eyebrow {
  margin: 0 0 14px;
}

.page-about .about-cta .h2 {
  margin: 0 0 14px;
  font-family: var(--ff-display);
  font-weight: 800;
  font-size: clamp(1.4rem, 2.8vw, 2.1rem);
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--c-ice);
}

.page-about .about-cta .lede {
  margin: 0;
  max-width: 46ch;
  color: var(--c-steel);
}

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

.page-about .cta-links a {
  display: block;
  padding: 18px 20px;
  background: var(--c-deep);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--c-ice);
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .cta-links a:hover,
.page-about .cta-links a:focus-visible {
  background: var(--c-mid);
  color: var(--c-cyan);
}

.page-about .cta-links a span {
  display: block;
  margin-top: 5px;
  font-size: 0.75rem;
  font-weight: 400;
  line-height: 1.6;
  color: var(--c-steel);
}
<<<PAGE_CSS_END>>>
<<<END>>>