.page-about {
  --about-lead: 16px;
  background: var(--k1-bg);
  color: var(--k1-text);
  overflow-x: clip;
}

.page-about .k1-breadcrumb {
  padding: 20px 0 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 34px 0 52px;
  border-bottom: 1px solid var(--k1-line);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -60px;
  right: -120px;
  width: 380px;
  height: 380px;
  background: radial-gradient(closest-side, rgba(47, 230, 200, .16), transparent 72%);
  pointer-events: none;
}

.page-about .about-hero__eyebrow {
  color: var(--k1-lime);
  font-size: 12px;
  letter-spacing: .16em;
}

.page-about .about-hero__title {
  margin: 16px 0 0;
  max-width: 24ch;
  font-family: var(--k1-display);
  font-weight: 800;
  letter-spacing: -.02em;
  font-size: clamp(28px, 6.4vw, 54px);
  line-height: 1.12;
}

.page-about .about-hero__lead {
  margin: 20px 0 0;
  max-width: 66ch;
  font-size: var(--about-lead);
  line-height: 1.78;
  color: var(--k1-muted);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 34px 0 0;
  background: var(--k1-line);
  border: 1px solid var(--k1-line);
  border-radius: var(--k1-r);
  overflow: hidden;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  background: var(--k1-panel);
}

.page-about .about-stat__label {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--k1-muted);
}

.page-about .about-stat__num {
  font-size: 21px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--k1-lime);
}

/* ---------- 布局与左栏 ---------- */
.page-about .about-layout {
  padding-bottom: 72px;
}

.page-about .about-rail {
  display: flex;
  gap: 8px;
  margin: 0 0 8px;
  padding: 14px 0;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
  border-top: 1px solid var(--k1-line);
  border-bottom: 1px solid var(--k1-line);
  -webkit-overflow-scrolling: touch;
}

.page-about .about-rail::-webkit-scrollbar {
  height: 3px;
}

.page-about .about-rail::-webkit-scrollbar-thumb {
  background: var(--k1-line-strong);
}

.page-about .about-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  flex: 0 0 auto;
  padding: 8px 12px;
  border: 1px solid transparent;
  border-radius: var(--k1-r);
  font-size: 13px;
  color: var(--k1-muted);
  text-decoration: none;
  scroll-snap-align: start;
  transition: color .15s var(--k1-ease), background-color .15s var(--k1-ease), border-color .15s var(--k1-ease);
}

.page-about .about-rail__link:hover {
  color: var(--k1-text);
  background: var(--k1-lime-06);
  border-color: var(--k1-line-strong);
}

.page-about .about-rail__link:focus-visible {
  outline: 2px solid var(--k1-lime);
  outline-offset: 2px;
  color: var(--k1-text);
}

.page-about .about-rail__num {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--k1-lime);
}

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  padding: 44px 0 0;
}

.page-about .about-chapter + .about-chapter {
  margin-top: 48px;
  border-top: 1px solid var(--k1-line-soft);
}

.page-about .about-chapter .k1-chapter__index {
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--k1-lime);
}

.page-about .about-chapter .k1-chapter__title {
  margin: 10px 0 0;
  font-family: var(--k1-display);
  font-weight: 800;
  letter-spacing: -.015em;
  line-height: 1.2;
}

.page-about .about-chapter .k1-chapter__lead {
  margin: 14px 0 0;
  max-width: 68ch;
  font-size: var(--about-lead);
  line-height: 1.78;
  color: var(--k1-muted);
}

/* ---------- 01 起点 ---------- */
.page-about .about-split {
  display: grid;
  gap: 26px;
  margin-top: 26px;
}

.page-about .about-split__text p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--k1-text);
}

.page-about .about-split__text p:last-child {
  margin-bottom: 0;
}

.page-about .k1-media {
  margin: 0;
  border: 1px solid var(--k1-line);
  border-radius: var(--k1-r);
  overflow: hidden;
  background: var(--k1-panel);
}

.page-about .k1-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .k1-media__caption {
  padding: 10px 14px;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--k1-muted);
  border-top: 1px solid var(--k1-line);
  background: var(--k1-panel-2);
}

/* ---------- 02 赛季时间轴 ---------- */
.page-about .about-timeline-media {
  margin-top: 26px;
}

.page-about .about-timeline {
  list-style: none;
  display: grid;
  gap: 1px;
  margin: 24px 0 0;
  padding: 0;
  background: var(--k1-line);
  border: 1px solid var(--k1-line);
  border-radius: var(--k1-r);
  overflow: hidden;
}

.page-about .about-timeline__node {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px 22px 26px;
  background: var(--k1-panel);
  transition: background-color .15s var(--k1-ease);
}

.page-about .about-timeline__node:hover {
  background: var(--k1-panel-2);
}

.page-about .about-timeline__code {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--k1-cyan);
}

.page-about .about-timeline__node h3 {
  margin: 0;
  font-size: 17px;
  letter-spacing: -.01em;
}

.page-about .about-timeline__node p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--k1-muted);
}

.page-about .about-timeline__node .k1-btn {
  align-self: flex-start;
  margin-top: auto;
}

/* ---------- 03 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.page-about .about-team__card {
  position: relative;
  padding: 26px 22px;
  background: var(--k1-panel);
  border: 1px solid var(--k1-line);
  border-left: 3px solid var(--k1-line-strong);
  border-radius: var(--k1-r);
  transition: transform .15s var(--k1-ease), border-color .15s var(--k1-ease), box-shadow .15s var(--k1-ease);
}

.page-about .about-team__card:hover,
.page-about .about-team__card:focus-within {
  transform: translateY(-2px);
  border-color: var(--k1-line-strong);
  border-left-color: var(--k1-lime);
  box-shadow: var(--k1-shadow);
}

.page-about .about-team__card--lead {
  border-left-color: var(--k1-lime);
}

.page-about .about-team__card .k1-meta {
  margin: 0;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--k1-muted);
}

.page-about .about-team__card h3 {
  margin: 10px 0 0;
  font-size: 19px;
}

.page-about .about-team__count {
  margin: 8px 0 0;
  font-size: 30px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--k1-lime);
}

.page-about .about-team__duties {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--k1-muted);
}

/* ---------- 04 流程 ---------- */
.page-about .about-track {
  margin-top: 28px;
}

.page-about .about-track svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-track__line {
  stroke: var(--k1-line-strong);
  stroke-width: 1;
}

.page-about .about-track__dot {
  fill: var(--k1-lime);
}

.page-about .about-flow {
  list-style: none;
  display: grid;
  gap: 18px;
  margin: 22px 0 0;
  padding: 0;
}

.page-about .about-flow__step {
  padding: 16px 0 0;
  border-top: 2px solid var(--k1-line-strong);
  transition: border-color .15s var(--k1-ease);
}

.page-about .about-flow__step:hover {
  border-top-color: var(--k1-lime);
}

.page-about .about-flow__num {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--k1-cyan);
}

.page-about .about-flow__step h3 {
  margin: 8px 0 0;
  font-size: 16px;
}

.page-about .about-flow__step p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.74;
  color: var(--k1-muted);
}

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

/* ---------- 05 字段 ---------- */
.page-about .about-fields {
  display: grid;
  gap: 1px;
  margin-top: 26px;
  background: var(--k1-line);
  border: 1px solid var(--k1-line);
  border-radius: var(--k1-r);
  overflow: hidden;
}

.page-about .about-fields__group {
  padding: 20px;
  background: var(--k1-panel);
}

.page-about .about-fields__group h3 {
  margin: 0 0 12px;
  font-size: 15px;
  letter-spacing: .01em;
  color: var(--k1-text);
}

.page-about .about-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about .about-chip {
  display: inline-block;
  padding: 3px 10px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--k1-muted);
  border: 1px solid var(--k1-line-strong);
  border-radius: 999px;
  background: var(--k1-panel-2);
}

.page-about .about-chip--amber {
  color: var(--k1-amber);
  border-color: rgba(255, 197, 61, .42);
}

.page-about .about-chip--red {
  color: var(--k1-red);
  border-color: rgba(229, 72, 77, .42);
}

.page-about .about-chip--orange {
  color: var(--k1-orange);
  border-color: rgba(255, 122, 47, .42);
}

.page-about .about-fields__note {
  margin: 22px 0 0;
  max-width: 72ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--k1-muted);
  padding-left: 16px;
  border-left: 2px solid var(--k1-cyan);
}

/* ---------- 06 合作与认可 ---------- */
.page-about .about-recognition {
  margin-top: 24px;
  border-top: 1px solid var(--k1-line);
}

.page-about .about-recognition__row {
  display: grid;
  gap: 8px;
  padding: 20px 0;
  border-bottom: 1px solid var(--k1-line-soft);
}

.page-about .about-recognition__value {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--k1-lime);
}

.page-about .about-recognition__body h3 {
  margin: 0;
  font-size: 16px;
}

.page-about .about-recognition__body p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.74;
  color: var(--k1-muted);
}

/* ---------- 07 CTA ---------- */
.page-about .about-cta {
  margin-top: 26px;
  padding: 28px 24px;
  border: 1px solid var(--k1-line-strong);
  border-radius: var(--k1-r);
  background: linear-gradient(140deg, var(--k1-panel-2) 0%, var(--k1-panel) 62%, var(--k1-bg) 100%);
}

.page-about .about-cta__text {
  margin: 0 0 14px;
  max-width: 70ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--k1-text);
}

.page-about .about-cta__text:last-of-type {
  margin-bottom: 0;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 26px;
  }

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

  .page-about .about-recognition__row {
    grid-template-columns: 200px minmax(0, 1fr);
    align-items: start;
    gap: 26px;
  }
}

@media (min-width: 900px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr);
    gap: 44px;
    align-items: start;
  }

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

  .page-about .about-team {
    grid-template-columns: 1.16fr 1fr .88fr;
  }

  .page-about .about-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 24px;
  }

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

  .page-about .about-chapter {
    padding-top: 52px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-rail {
    flex-direction: column;
    gap: 2px;
    margin: 0;
    padding: 4px 0 4px 16px;
    overflow: visible;
    border-top: 0;
    border-bottom: 0;
    border-left: 1px solid var(--k1-line);
    position: sticky;
    top: 24px;
  }

  .page-about .about-rail__link {
    width: 100%;
    justify-content: flex-start;
    padding: 9px 12px;
  }

  .page-about .about-hero {
    padding-top: 40px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .about-stat {
    padding: 18px 16px;
  }

  .page-about .about-stat__num {
    font-size: 19px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team__card,
  .page-about .about-flow__step,
  .page-about .about-timeline__node,
  .page-about .about-rail__link {
    transition: none;
  }
}