.page-about {
  --about-vrail: 172px;
  --about-gap: clamp(18px, 2.6vw, 30px);
}

/* 面包屑 */
.page-about .breadcrumb {
  padding-top: clamp(16px, 2.6vw, 28px);
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  padding-top: clamp(14px, 2vw, 24px);
}

.page-about .about-hero-frame {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 16% -12%, rgba(30, 92, 70, 0.62), transparent 60%),
    linear-gradient(166deg, var(--sea-deep) 0%, var(--sea) 52%, var(--pitch) 100%);
  box-shadow: var(--shadow-panel);
}

.page-about .about-hero-frame::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 46%;
  background: linear-gradient(to top, rgba(5, 11, 20, 0.86), rgba(5, 11, 20, 0));
  pointer-events: none;
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
  padding: clamp(26px, 4.6vw, 58px) clamp(20px, 3.8vw, 54px);
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  max-width: 17em;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(27px, 5vw, 50px);
  line-height: 1.24;
  letter-spacing: -0.02em;
  color: var(--cream);
}

.page-about .about-hero .lede {
  margin-top: clamp(14px, 2vw, 22px);
  max-width: 56ch;
  color: var(--text-soft);
}

.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 16px;
  margin-top: clamp(24px, 3.6vw, 40px);
  padding-top: clamp(18px, 2.6vw, 26px);
  border-top: 1px solid var(--line-gold);
}

.page-about .about-hero-stats .metric-value {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(24px, 3.6vw, 36px);
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--gold);
}

.page-about .about-hero-stats .metric-label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-mute);
}

/* ---------- 通用章节头 ---------- */
.page-about .section-head > p:not(.eyebrow) {
  margin-top: 12px;
  max-width: 62ch;
  color: var(--text-soft);
}

.page-about .section-head h2 {
  font-family: var(--font-display);
  color: var(--cream);
  letter-spacing: -0.015em;
}

/* ---------- 团队构成 ---------- */
.page-about .about-team-media {
  margin: 0 0 clamp(22px, 3vw, 34px);
}

.page-about .about-team-chips {
  margin-bottom: clamp(18px, 2.4vw, 26px);
}

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

.page-about .about-team-card {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 2.6vw, 30px);
  border-radius: var(--radius-md);
  border: 1px solid rgba(232, 196, 106, 0.16);
  background: linear-gradient(180deg, rgba(30, 92, 70, 0.4), rgba(18, 61, 47, 0.2));
}

.page-about .about-team-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), rgba(232, 196, 106, 0) 72%);
  opacity: 0.75;
}

.page-about .about-team-index {
  display: block;
  margin-bottom: 12px;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--gold);
}

.page-about .about-team-card .card-title {
  margin: 0;
  font-size: 20px;
  color: var(--cream);
}

.page-about .about-team-card .card-meta {
  margin: 8px 0 0;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--gold);
}

.page-about .about-team-card .card-body {
  margin: 14px 0 0;
  color: var(--text-soft);
  line-height: 1.8;
}

/* ---------- 赛季节奏 ---------- */
.page-about .about-season {
  background:
    linear-gradient(180deg, rgba(18, 61, 47, 0.28), rgba(10, 27, 46, 0));
}

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

.page-about .about-season-step {
  position: relative;
  padding: 22px 20px 20px 26px;
  border-left: 2px solid rgba(232, 196, 106, 0.3);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: linear-gradient(120deg, rgba(18, 61, 47, 0.5), rgba(10, 27, 46, 0.22));
}

.page-about .about-season-dot {
  position: absolute;
  left: -7px;
  top: 28px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(232, 196, 106, 0.16);
}

.page-about .about-season-phase {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--gold);
}

.page-about .about-season-step h3 {
  margin: 10px 0 0;
  font-size: 19px;
  line-height: 1.35;
  color: var(--cream);
}

.page-about .about-season-text {
  margin: 12px 0 0;
  color: var(--text-soft);
  line-height: 1.8;
}

.page-about .about-season-step .disclosure {
  margin-top: 16px;
}

.page-about .about-bullets {
  margin: 0;
  padding-left: 18px;
  color: var(--text-soft);
  line-height: 1.85;
}

.page-about .about-bullets li + li {
  margin-top: 7px;
}

/* ---------- 版本演进 ---------- */
.page-about .about-history {
  background:
    radial-gradient(70% 60% at 92% 0%, rgba(138, 160, 180, 0.12), transparent 62%),
    var(--sea-deep);
}

.page-about .about-history-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 2.6vw, 28px);
}

.page-about .about-year-caption {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--archive);
}

.page-about .about-year-list {
  position: relative;
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-year-list::-webkit-scrollbar {
  display: none;
}

.page-about .about-year-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 15px;
  border-radius: 999px;
  border: 1px solid var(--line-cool);
  color: var(--text-soft);
  font-size: 13px;
  letter-spacing: 0.1em;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease), background-color 0.3s var(--ease);
}

.page-about .about-year-link:hover,
.page-about .about-year-link:focus-visible {
  color: var(--gold);
  border-color: rgba(232, 196, 106, 0.55);
  background: rgba(232, 196, 106, 0.08);
}

.page-about .about-version-stack {
  display: block;
}

.page-about .about-version {
  position: relative;
  padding: clamp(20px, 2.6vw, 30px);
  margin-bottom: 14px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(138, 160, 180, 0.18);
  background: linear-gradient(152deg, rgba(138, 160, 180, 0.09), rgba(10, 27, 46, 0.5));
  scroll-margin-top: 96px;
}

.page-about .about-version-origin {
  border-color: rgba(138, 160, 180, 0.3);
}

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

.page-about .about-version-year {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(22px, 3.2vw, 30px);
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--gold);
}

.page-about .about-version-origin .about-version-year {
  color: var(--archive);
}

.page-about .about-version-title {
  margin: 14px 0 0;
  font-size: 19px;
  line-height: 1.4;
  color: var(--cream);
}

.page-about .about-version-text {
  margin: 10px 0 0;
  max-width: 60ch;
  color: var(--text-soft);
  line-height: 1.8;
}

.page-about .about-version-figure {
  margin: clamp(22px, 3vw, 32px) 0 0;
  max-width: 440px;
}

/* ---------- 资料来源 ---------- */
.page-about .about-collab-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-about .about-collab-card {
  padding: clamp(20px, 2.6vw, 30px);
  border-radius: var(--radius-md);
  border: 1px solid var(--line-cool);
  background: linear-gradient(200deg, rgba(85, 112, 76, 0.28), rgba(10, 27, 46, 0.36));
}

.page-about .about-collab-num {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(30px, 4.6vw, 42px);
  line-height: 1;
  color: var(--moss);
}

.page-about .about-collab-card h3 {
  margin: 10px 0 0;
  font-size: 19px;
  color: var(--cream);
}

.page-about .about-collab-card p:last-child {
  margin: 12px 0 0;
  color: var(--text-soft);
  line-height: 1.8;
}

.page-about .about-flow {
  margin: 0;
}

/* ---------- 内容标准 ---------- */
.page-about .about-rules {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--line-cool);
}

.page-about .about-rule {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding: clamp(20px, 2.8vw, 30px);
  background: var(--sea);
}

.page-about .about-rule-no {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(26px, 4vw, 36px);
  line-height: 1;
  color: var(--clay);
}

.page-about .about-rule-body h3 {
  margin: 0;
  font-size: 18px;
  line-height: 1.4;
  color: var(--cream);
}

.page-about .about-rule-body p {
  margin: 8px 0 0;
  max-width: 58ch;
  color: var(--text-soft);
  line-height: 1.8;
}

/* ---------- 收束 ---------- */
.page-about .about-next-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
  padding: clamp(24px, 4vw, 48px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-gold);
  background:
    radial-gradient(96% 130% at 100% 0%, rgba(232, 196, 106, 0.16), transparent 58%),
    linear-gradient(150deg, var(--pitch), var(--sea-deep));
}

.page-about .about-next-copy h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1.3;
  letter-spacing: -0.015em;
  color: var(--cream);
}

.page-about .about-next-copy p:last-child {
  margin: 14px 0 0;
  max-width: 56ch;
  color: var(--text-soft);
  line-height: 1.8;
}

.page-about .about-next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-next-links .btn {
  flex: 1 1 auto;
  min-width: 132px;
  text-align: center;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-rule {
    grid-template-columns: minmax(0, 96px) minmax(0, 1fr);
    align-items: start;
    gap: clamp(18px, 3vw, 34px);
  }
}

@media (min-width: 760px) {
  .page-about .about-team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-season-track {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-history-split {
    grid-template-columns: var(--about-vrail) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 58px);
    align-items: start;
  }

  .page-about .about-year-rail {
    position: sticky;
    top: 94px;
  }

  .page-about .about-year-list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-year-list::before {
    content: "";
    position: absolute;
    left: 3.5px;
    top: 22px;
    bottom: 22px;
    width: 1px;
    background: var(--line-cool);
  }

  .page-about .about-year-link {
    display: flex;
    align-items: center;
    padding: 9px 0 9px 20px;
    border: 0;
    border-radius: 0;
    background: transparent;
    color: var(--text-soft);
  }

  .page-about .about-year-link::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    transform: translateY(-50%);
    background: var(--archive);
    transition: background-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
  }

  .page-about .about-year-link:hover::before,
  .page-about .about-year-link:focus-visible::before {
    background: var(--gold);
    box-shadow: 0 0 0 5px rgba(232, 196, 106, 0.14);
  }

  .page-about .about-year-link:hover,
  .page-about .about-year-link:focus-visible {
    background: transparent;
    border-color: transparent;
  }

  .page-about .about-version:nth-child(2n) {
    margin-left: clamp(0px, 1.4vw, 20px);
  }

  .page-about .about-next-panel {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    align-items: center;
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .about-next-links {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-year-link,
  .page-about .about-year-link::before {
    transition: none;
  }
}
</