.page-about {
  display: block;
}

.page-about .about-crumbs {
  padding-block: clamp(14px, 3vw, 26px) 0;
}

.page-about .about-hero,
.page-about .about-flow,
.page-about .about-team,
.page-about .about-report,
.page-about .about-history,
.page-about .about-records,
.page-about .about-cta {
  padding-block: clamp(42px, 7vw, 94px);
}

.page-about .about-intro {
  max-width: 62ch;
  margin: 14px 0 0;
  font-size: clamp(15.5px, 1.5vw, 17px);
  line-height: 1.85;
  color: rgba(233, 247, 241, .82);
}

.page-about .section-head h2 {
  margin: 10px 0 0;
  font-size: clamp(24px, 4.4vw, 38px);
  line-height: 1.22;
  letter-spacing: -0.015em;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding-block: clamp(20px, 4vw, 40px) clamp(44px, 7vw, 92px);
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
  align-items: center;
}

.page-about .about-hero h1 {
  margin: 12px 0 0;
  font-size: clamp(31px, 7vw, 54px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--ink);
}

.page-about .about-lede {
  margin: 18px 0 0;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.85;
  color: rgba(233, 247, 241, .84);
}

.page-about .about-hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(24px, 4vw, 38px);
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-about .about-fact {
  background: var(--panel);
  padding: 14px 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-fact-num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1;
  color: var(--amber);
}

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

.page-about .about-hero-visual {
  padding: clamp(16px, 3vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  background:
    radial-gradient(120% 90% at 20% 8%, rgba(124, 243, 212, .1), transparent 62%),
    linear-gradient(160deg, var(--panel), var(--bg) 72%);
}

.page-about .about-board {
  display: block;
  width: 100%;
  max-width: 440px;
  height: auto;
  margin-inline: auto;
}

/* ---------- 比赛日链路 ---------- */

.page-about .about-flow-list {
  list-style: none;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-flow-item {
  background: var(--bg);
  padding: 18px 18px 22px;
  display: grid;
  gap: 8px;
  align-content: start;
}

.page-about .about-flow-no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--grid);
}

.page-about .about-flow-time {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--amber);
}

.page-about .about-flow-title {
  margin: 0;
  font-size: 17px;
  font-weight: 800;
  color: var(--ink);
}

.page-about .about-flow-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 数据来源 ---------- */

.page-about .about-source {
  background: var(--panel);
  border-block: 1px solid var(--line);
  padding-block: clamp(44px, 7vw, 96px);
}

.page-about .about-wide-figure,
.page-about .about-band-figure,
.page-about .about-square-figure {
  margin: clamp(26px, 4vw, 42px) 0 0;
}

.page-about .about-band-figure {
  margin-top: clamp(22px, 3.5vw, 34px);
}

.page-about .about-wide-figure img,
.page-about .about-band-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg);
}

.page-about .about-wide-figure img {
  aspect-ratio: 13 / 7;
}

.page-about .about-band-figure img {
  aspect-ratio: 12 / 7;
}

.page-about .about-figcap {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--muted);
}

.page-about .about-source-grid {
  display: grid;
  gap: clamp(24px, 4vw, 46px);
  margin-top: clamp(26px, 4vw, 44px);
  align-items: center;
}

.page-about .about-map-svg {
  display: block;
  width: 100%;
  height: auto;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(46, 107, 87, .16), transparent 72%), var(--bg);
}

.page-about .src-link {
  stroke: var(--grid);
  stroke-width: 1;
  stroke-dasharray: 3 5;
}

.page-about .src-dot {
  fill: var(--grid);
  transition: fill .25s ease;
}

.page-about .src-label {
  fill: var(--muted);
  font-family: var(--font-mono);
  font-size: 12px;
  transition: fill .25s ease;
}

.page-about .src-node:hover .src-dot,
.page-about .src-node:focus-within .src-dot {
  fill: var(--cyan);
}

.page-about .src-node:hover .src-label,
.page-about .src-node:focus-within .src-label {
  fill: var(--ink);
}

.page-about .src-core {
  fill: var(--cyan);
}

.page-about .src-core-label {
  fill: var(--ink);
  font-family: var(--font-mono);
  font-size: 13px;
}

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

.page-about .about-point {
  background: var(--bg);
  padding: 16px 18px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 16px;
  align-items: baseline;
}

.page-about .about-point-num {
  font-family: var(--font-mono);
  font-size: clamp(18px, 2.4vw, 24px);
  line-height: 1.1;
  color: var(--cyan);
  white-space: nowrap;
}

.page-about .about-point-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(233, 247, 241, .8);
}

/* ---------- 团队 ---------- */

.page-about .about-narrow {
  max-width: 940px;
}

.page-about .about-roles {
  margin-top: clamp(24px, 4vw, 38px);
}

.page-about .about-role-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-role-tab {
  display: inline-flex;
  align-items: center;
  padding: 8px 15px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink);
  text-decoration: none;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 999px;
  transition: border-color .2s ease, color .2s ease, background .2s ease;
}

.page-about .about-role-tab:hover,
.page-about .about-role-tab:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(124, 243, 212, .06);
}

.page-about .about-role-panels {
  display: grid;
  gap: 16px;
  margin-top: 18px;
}

.page-about .about-role {
  padding: 20px 20px 22px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  scroll-margin-top: 130px;
  transition: border-color .3s ease, box-shadow .3s ease;
}

.page-about .about-role:target {
  border-color: var(--cyan);
  box-shadow: 0 0 0 1px rgba(124, 243, 212, .3), var(--shadow);
}

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

.page-about .about-role-head h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 800;
  color: var(--ink);
}

.page-about .about-role-count {
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1;
  color: var(--orange);
}

.page-about .about-role-list {
  margin: 14px 0 0;
  padding-left: 18px;
  display: grid;
  gap: 9px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 战报流程 ---------- */

.page-about .about-report-grid {
  display: grid;
  gap: clamp(28px, 5vw, 52px);
  align-items: center;
}

.page-about .about-steps {
  list-style: none;
  counter-reset: about-step;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
}

.page-about .about-step {
  counter-increment: about-step;
  position: relative;
  padding: 0 0 22px 42px;
}

.page-about .about-step::before {
  content: counter(about-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 50%;
}

.page-about .about-step:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 13px;
  top: 32px;
  bottom: 4px;
  width: 1px;
  background: var(--line);
}

.page-about .about-step h3 {
  margin: 0 0 5px;
  font-size: 16px;
  font-weight: 800;
  color: var(--ink);
}

.page-about .about-step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-note {
  margin: 20px 0 0;
  padding: 14px 16px;
  border-left: 2px solid var(--cyan);
  background: rgba(124, 243, 212, .05);
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(233, 247, 241, .86);
}

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

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

.page-about .about-square-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg);
}

/* ---------- 发展历程 ---------- */

.page-about .about-tl {
  list-style: none;
  position: relative;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0 0 0 28px;
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), var(--grid) 34%, var(--line));
}

.page-about .about-stage {
  position: relative;
  display: grid;
  gap: 10px;
  padding: 18px 20px 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.page-about .about-stage::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 24px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--cyan);
}

.page-about .about-stage-mark {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .about-stage-no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--grid);
}

.page-about .about-stage-year {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1;
  color: var(--amber);
}

.page-about .about-stage-body h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 800;
  color: var(--ink);
}

.page-about .about-stage-body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 资质与承诺 ---------- */

.page-about .about-records-grid {
  display: grid;
  gap: 1px;
  margin-top: clamp(26px, 4vw, 42px);
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-record {
  background: var(--bg);
  padding: 22px 20px 24px;
  display: grid;
  gap: 8px;
  align-content: start;
}

.page-about .about-record-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--orange);
}

.page-about .about-record h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 800;
  color: var(--ink);
}

.page-about .about-record p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 收束 ---------- */

.page-about .about-cta {
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(46, 107, 87, .18), transparent 82%);
}

.page-about .about-cta-grid {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}

.page-about .about-cta h2 {
  margin: 10px 0 0;
  font-size: clamp(24px, 4vw, 36px);
  line-height: 1.24;
  letter-spacing: -0.01em;
}

.page-about .about-cta p {
  margin: 14px 0 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-cta .about-actions {
  margin-top: 0;
  align-self: end;
}

/* ---------- 响应式 ---------- */

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

@media (min-width: 760px) {
  .page-about .about-stage {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 8px 26px;
    align-items: start;
  }

  .page-about .about-stage-mark {
    flex-direction: column;
    gap: 8px;
  }
}

@media (min-width: 860px) {
  .page-about .about-role-panels {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .about-cta-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-source-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-about .about-report-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 4fr);
  }
}

@media (min-width: 1080px) {
  .page-about .about-flow-list {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (hover: none) {
  .page-about .about-role-tab {
    padding: 10px 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role-tab,
  .page-about .about-role,
  .page-about .src-dot,
  .page-about .src-label {
    transition: none;
  }
}