.page-about {
  overflow-x: clip;
  background: var(--ink);
  color: var(--fog);
}

.page-about h1,
.page-about h2,
.page-about h3 {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.14;
}

.page-about h2 {
  font-size: clamp(26px, 4.4vw, 44px);
  margin-top: 10px;
}

.page-about h3 {
  font-size: clamp(17px, 2.2vw, 21px);
  color: var(--fog);
}

.page-about p {
  margin: 0;
  color: var(--mute);
  font-size: 16px;
  line-height: 1.7;
}

.page-about .about-crumb .breadcrumbs {
  margin: 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 24px 0 clamp(36px, 6vw, 76px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 6% 0%, rgba(53, 230, 208, 0.15), transparent 62%),
    radial-gradient(95% 85% at 100% 4%, rgba(139, 92, 255, 0.17), transparent 64%),
    radial-gradient(90% 70% at 92% 100%, rgba(255, 122, 47, 0.11), transparent 60%);
}

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

.page-about .about-hero-main h1 {
  font-size: clamp(32px, 6.4vw, 68px);
  margin-top: 14px;
  text-wrap: balance;
}

.page-about .about-lead {
  margin-top: 18px;
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 18px);
  color: var(--fog);
  opacity: 0.9;
}

.page-about .about-hero-figure {
  display: block;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: linear-gradient(160deg, var(--deep), rgba(15, 29, 51, 0.7));
}

.page-about .about-hero-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(84px, 17vw, 158px);
  font-weight: 700;
  line-height: 0.82;
  letter-spacing: -0.05em;
  color: var(--cyan);
}

@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .page-about .about-hero-num {
    background: linear-gradient(155deg, var(--cyan) 5%, var(--violet) 55%, var(--orange) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
}

.page-about .about-hero-unit {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--mute);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(88px, 1fr));
  gap: 14px;
  margin: 22px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-about .about-stat dt {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mute);
  line-height: 1.45;
}

.page-about .about-stat dd {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 700;
  color: var(--fog);
}

/* ---------- 起点 ---------- */
.page-about .about-origin {
  padding: clamp(44px, 7vw, 88px) 0;
}

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

.page-about .origin-pain {
  padding-left: 18px;
  border-left: 2px solid var(--cyan);
}

.page-about .origin-quote {
  font-size: clamp(17px, 2.4vw, 22px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--fog);
}

.page-about .origin-pain-text {
  margin-top: 14px;
  font-size: 15px;
}

.page-about .origin-flow {
  display: grid;
  gap: 14px;
}

.page-about .origin-step {
  position: relative;
  padding: 20px 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--deep);
}

.page-about .origin-step p {
  margin-top: 8px;
  font-size: 15px;
}

.page-about .origin-no {
  display: inline-block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .origin-step:nth-child(2) .origin-no {
  color: var(--violet);
}

.page-about .origin-step:nth-child(3) .origin-no {
  color: var(--orange);
}

/* ---------- 赛季档案 ---------- */
.page-about .about-seasons {
  padding: clamp(44px, 7vw, 88px) 0;
  background: linear-gradient(180deg, var(--deep), var(--ink) 70%);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-seasons-intro {
  margin-top: 14px;
  max-width: 64ch;
  font-size: 15px;
}

.page-about .about-figure {
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: var(--card);
}

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

.page-about .about-figure--wall img {
  aspect-ratio: 14 / 9;
}

.page-about .about-figure figcaption {
  padding: 12px 18px 14px;
  font-size: 13px;
  color: var(--mute);
  border-top: 1px solid var(--line);
}

.page-about .season-rail {
  display: flex;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 30px);
  padding: 4px 0 14px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .season-chip {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: rgba(15, 29, 51, 0.85);
  color: var(--mute);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .season-chip:hover,
.page-about .season-chip:focus-visible {
  border-color: var(--cyan);
  color: var(--fog);
  background: rgba(53, 230, 208, 0.1);
}

.page-about .season-chip:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-about .season-chip-no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-about .season-list {
  margin-top: 10px;
}

.page-about .season-block {
  display: grid;
  gap: 10px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 20px);
}

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

.page-about .season-no {
  font-family: var(--font-mono);
  font-size: clamp(30px, 5.4vw, 46px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--line);
  transition: color var(--dur) var(--ease);
}

.page-about .season-name {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--mute);
}

.page-about .season-body p {
  margin-top: 10px;
  font-size: 15px;
  max-width: 66ch;
}

.page-about .season-block:target {
  background: linear-gradient(90deg, rgba(53, 230, 208, 0.11), transparent 62%);
}

.page-about .season-block:target .season-no {
  color: var(--cyan);
}

/* ---------- 核验流程 ---------- */
.page-about .about-verify {
  padding: clamp(44px, 7vw, 88px) 0;
}

.page-about .verify-grid {
  display: grid;
  gap: clamp(24px, 3.4vw, 40px);
}

.page-about .verify-intro {
  margin-top: 14px;
  max-width: 64ch;
  font-size: 15px;
}

.page-about .verify-steps {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .verify-item {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--card);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease);
}

.page-about .verify-item[open] {
  border-color: rgba(53, 230, 208, 0.55);
}

.page-about .verify-item summary {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 56px;
  padding: 14px 18px;
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  color: var(--fog);
}

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

.page-about .verify-item summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--cyan);
}

.page-about .verify-item[open] summary::after {
  content: "−";
}

.page-about .verify-item summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-about .verify-no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-about .verify-item p {
  padding: 0 18px 18px;
  font-size: 15px;
}

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

.page-about .about-figure--tall img {
  aspect-ratio: 3 / 4;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: clamp(44px, 7vw, 88px) 0;
  background: linear-gradient(160deg, var(--deep), var(--ink) 72%);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .team-intro {
  margin-top: 14px;
  max-width: 64ch;
  font-size: 15px;
}

.page-about .team-top {
  display: grid;
  gap: clamp(20px, 3vw, 30px);
  margin-top: clamp(22px, 3vw, 32px);
}

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

.page-about .about-figure--team img {
  aspect-ratio: 14 / 9;
}

.page-about .team-tz {
  display: grid;
  gap: 18px;
  align-content: start;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: rgba(15, 29, 51, 0.6);
}

.page-about .tz-ring {
  display: block;
  width: min(200px, 100%);
  height: auto;
  margin: 0 auto;
}

.page-about .tz-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .tz-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--mute);
}

.page-about .tz-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex: 0 0 auto;
}

.page-about .tz-dot--cyan { background: var(--cyan); }
.page-about .tz-dot--violet { background: var(--violet); }
.page-about .tz-dot--orange { background: var(--orange); }
.page-about .tz-dot--green { background: var(--green); }

.page-about .team-switch {
  position: relative;
  margin-top: clamp(24px, 3.4vw, 36px);
}

.page-about .team-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-about .team-tabs {
  display: inline-flex;
  gap: 6px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: var(--card);
}

.page-about .team-tab {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 20px;
  border-radius: var(--radius-pill);
  color: var(--mute);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about #team-editor:checked ~ .team-tabs label[for="team-editor"],
.page-about #team-data:checked ~ .team-tabs label[for="team-data"] {
  background: rgba(53, 230, 208, 0.15);
  color: var(--fog);
  box-shadow: inset 0 0 0 1px var(--cyan);
}

.page-about #team-editor:focus-visible ~ .team-tabs label[for="team-editor"],
.page-about #team-data:focus-visible ~ .team-tabs label[for="team-data"] {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-about .team-panel {
  display: none;
  margin-top: 18px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: var(--card);
}

.page-about #team-editor:checked ~ .team-panel--editor,
.page-about #team-data:checked ~ .team-panel--data {
  display: block;
}

.page-about .team-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .team-list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.66;
  color: var(--mute);
}

.page-about .team-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 7px;
  height: 2px;
  background: var(--cyan);
}

/* ---------- 版本演进 ---------- */
.page-about .about-version {
  padding: clamp(44px, 7vw, 88px) 0;
}

.page-about .version-intro {
  margin-top: 14px;
  max-width: 64ch;
  font-size: 15px;
}

.page-about .version-cards {
  display: grid;
  gap: 16px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .version-card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background:
    linear-gradient(150deg, rgba(53, 230, 208, 0.1), transparent 58%),
    var(--card);
}

.page-about .version-tag {
  display: inline-block;
  margin-bottom: 12px;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  background: rgba(53, 230, 208, 0.16);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
}

.page-about .version-tag--violet {
  background: rgba(139, 92, 255, 0.18);
  color: #c4b0ff;
}

.page-about .version-card p {
  margin-top: 10px;
  font-size: 15px;
}

.page-about .version-link {
  margin-top: 24px;
}

.page-about .version-link .btn {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 22px;
  border-radius: var(--radius-pill);
  text-decoration: none;
  font-weight: 700;
}

/* ---------- 合作 ---------- */
.page-about .about-partner {
  padding: clamp(44px, 7vw, 88px) 0 clamp(52px, 8vw, 96px);
  background:
    radial-gradient(100% 80% at 0% 0%, rgba(139, 92, 255, 0.16), transparent 62%),
    radial-gradient(90% 80% at 100% 100%, rgba(255, 122, 47, 0.13), transparent 60%),
    var(--deep);
  border-top: 1px solid var(--line);
}

.page-about .partner-intro {
  margin-top: 14px;
  max-width: 64ch;
  font-size: 15px;
}

.page-about .partner-grid {
  display: grid;
  gap: 16px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .partner-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(5, 11, 24, 0.55);
}

.page-about .partner-card p {
  font-size: 15px;
  flex: 1 1 auto;
}

.page-about .partner-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  align-self: flex-start;
  color: var(--cyan);
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease);
}

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

.page-about .partner-link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-about .about-cta {
  margin-top: clamp(26px, 4vw, 40px);
}

.page-about .about-cta .btn {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 0 26px;
  border-radius: var(--radius-pill);
  text-decoration: none;
  font-weight: 700;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .origin-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .origin-step:nth-child(3) {
    grid-column: 1 / -1;
  }

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

@media (min-width: 940px) {
  .page-about .about-hero {
    padding-top: 34px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.85fr);
    grid-template-areas:
      "crumb crumb"
      "main figure";
    align-items: end;
  }

  .page-about .about-crumb { grid-area: crumb; }
  .page-about .about-hero-main { grid-area: main; }
  .page-about .about-hero-figure { grid-area: figure; }

  .page-about .origin-grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    align-items: start;
  }

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

  .page-about .origin-step:nth-child(3) {
    grid-column: auto;
  }

  .page-about .season-block {
    grid-template-columns: minmax(150px, 0.26fr) minmax(0, 1fr);
    gap: 30px;
    padding: 28px 0;
  }

  .page-about .season-block:target {
    padding-left: 18px;
    border-radius: var(--radius-md);
  }

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

  .page-about .team-top {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.85fr);
    align-items: stretch;
  }

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

@media (min-width: 1180px) {
  .page-about .about-hero-figure {
    padding: 28px;
  }

  .page-about .team-tz {
    padding: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .season-chip,
  .page-about .season-no,
  .page-about .team-tab,
  .page-about .partner-link,
  .page-about .verify-item {
    transition: none;
  }
}