.page-about {
  --about-shell: 152px;
  --about-gap: clamp(34px, 6vw, 82px);
  display: block;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(22px, 4.6vw, 52px) 0 clamp(40px, 7vw, 88px);
  background:
    radial-gradient(112% 84% at 88% -8%, rgba(41, 242, 200, 0.15), transparent 62%),
    radial-gradient(84% 72% at 2% 108%, rgba(76, 211, 255, 0.11), transparent 64%),
    linear-gradient(178deg, var(--ink) 0%, var(--deep) 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: auto -12% -34% 42%;
  height: 340px;
  background: repeating-linear-gradient(112deg, rgba(41, 242, 200, 0.1) 0 1px, transparent 1px 28px);
  -webkit-mask-image: linear-gradient(104deg, transparent, #000 62%);
  mask-image: linear-gradient(104deg, transparent, #000 62%);
  pointer-events: none;
  z-index: -1;
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  margin-top: clamp(20px, 3.2vw, 38px);
}

.page-about .about-hero .display {
  margin: 12px 0 22px;
  font-size: clamp(34px, 6.2vw, 82px);
  font-weight: 200;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--white);
  max-width: 17ch;
}

.page-about .about-lede {
  margin: 0;
  max-width: 66ch;
  font-size: clamp(15px, 1.55vw, 17px);
  line-height: 1.88;
  color: rgba(242, 246, 245, 0.8);
}

.page-about .about-hero-side {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  align-self: end;
  border: 1px solid var(--line);
  border-radius: var(--r-m);
  background: var(--line);
  overflow: hidden;
}

.page-about .hero-metric {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(13px, 2vw, 20px);
  background: rgba(11, 15, 14, 0.74);
}

.page-about .hero-metric-num {
  display: flex;
  align-items: baseline;
  gap: 3px;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.2vw, 38px);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--neon);
}

.page-about .hero-metric-num--white {
  color: var(--white);
}

.page-about .hero-metric-unit {
  font-size: 0.5em;
  color: var(--silver);
}

.page-about .hero-metric-cap {
  font-size: 11px;
  letter-spacing: 0.1em;
  line-height: 1.5;
  color: var(--silver);
}

/* ---------- 主体骨架 ---------- */

.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4.4vw, 56px);
  padding-top: clamp(38px, 6vw, 78px);
  padding-bottom: clamp(52px, 8vw, 116px);
}

.page-about .about-rail {
  display: none;
}

.page-about .about-rail-inner {
  position: sticky;
  top: calc(var(--header-offset) + 18px);
}

.page-about .about-rail-nav {
  display: flex;
  flex-direction: column;
  margin-top: 14px;
  border-left: 1px solid var(--line);
}

.page-about .rail-link {
  display: block;
  margin-left: -1px;
  padding: 9px 0 9px 14px;
  border-left: 2px solid transparent;
  font-size: 12px;
  letter-spacing: 0.06em;
  line-height: 1.4;
  text-decoration: none;
  color: var(--silver);
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-about .rail-link span {
  display: block;
  margin-top: 2px;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(159, 176, 172, 0.6);
}

.page-about .rail-link:hover,
.page-about .rail-link:focus-visible {
  color: var(--white);
}

.page-about .rail-link.is-active {
  color: var(--neon);
  border-left-color: var(--neon);
}

.page-about .rail-link.is-active span {
  color: rgba(41, 242, 200, 0.68);
}

.page-about .about-flow {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* ---------- 赛季段落 ---------- */

.page-about .season {
  scroll-margin-top: calc(var(--header-offset) + 20px);
}

.page-about .season + .season {
  margin-top: var(--about-gap);
}

.page-about .season-inner {
  display: grid;
  gap: 14px;
  min-width: 0;
}

.page-about .season-index {
  margin: 0;
}

.page-about .season-main {
  min-width: 0;
}

.page-about .season-title {
  margin: 0 0 18px;
  font-size: clamp(23px, 3.2vw, 38px);
  font-weight: 400;
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--white);
  max-width: 24ch;
}

.page-about .season-text {
  margin: 0 0 16px;
  max-width: 70ch;
  font-size: clamp(14.5px, 1.5vw, 16.5px);
  line-height: 1.88;
  color: rgba(242, 246, 245, 0.78);
}

.page-about .season-inline {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--silver);
}

.page-about .season-inline a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(41, 242, 200, 0.36);
}

.page-about .season-inline a:hover,
.page-about .season-inline a:focus-visible {
  color: var(--white);
  border-bottom-color: var(--white);
}

.page-about .season-figure {
  margin: 26px 0 0;
  overflow: hidden;
  border-radius: var(--r-m);
}

.page-about .season-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--r-m);
}

/* ---------- 数据卡 ---------- */

.page-about .season-cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: 22px;
}

.page-about .season-card {
  padding: clamp(16px, 2.2vw, 22px);
  border: 1px solid var(--line);
  border-radius: var(--r-m);
  background: linear-gradient(158deg, rgba(18, 70, 58, 0.52), rgba(11, 15, 14, 0.38));
}

.page-about .card-num {
  display: flex;
  align-items: baseline;
  gap: 3px;
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.4vw, 42px);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--neon);
}

.page-about .card-unit {
  font-size: 0.42em;
  color: var(--silver);
}

.page-about .card-cap {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(242, 246, 245, 0.7);
}

/* ---------- 展开明细 ---------- */

.page-about .season-more {
  margin-top: 22px;
}

.page-about .season-more > summary {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 8px 15px;
  border: 1px solid rgba(41, 242, 200, 0.3);
  border-radius: 999px;
  background: rgba(41, 242, 200, 0.06);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--neon);
  cursor: pointer;
  list-style: none;
}

.page-about .season-more > summary::-webkit-details-marker {
  display: none;
}

.page-about .season-more > summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1;
}

.page-about .season-more[open] > summary::after {
  content: "–";
}

.page-about .season-more > summary:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
}

.page-about .season-more ul {
  display: grid;
  gap: 8px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .season-more li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(242, 246, 245, 0.72);
}

.page-about .season-more li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 2px;
  background: var(--amber);
}

/* ---------- 横向主题带 ---------- */

.page-about .band {
  margin: var(--about-gap) 0;
  padding: clamp(22px, 3vw, 38px) clamp(20px, 3vw, 42px);
  border-left: 3px solid var(--neon);
  border-radius: 0 var(--r-l) var(--r-l) 0;
  background: linear-gradient(100deg, rgba(18, 70, 58, 0.92) 0%, rgba(14, 42, 34, 0.55) 52%, rgba(11, 15, 14, 0) 100%);
}

.page-about .band--amber {
  border-left-color: var(--amber);
  background: linear-gradient(100deg, rgba(20, 46, 40, 0.9) 0%, rgba(14, 42, 34, 0.5) 54%, rgba(11, 15, 14, 0) 100%);
}

.page-about .band-grid {
  display: grid;
  gap: clamp(16px, 2.6vw, 30px);
  align-items: center;
}

.page-about .band-title {
  margin: 0;
  font-size: clamp(16px, 2vw, 22px);
  font-weight: 400;
  line-height: 1.45;
  color: var(--white);
  max-width: 26ch;
}

.page-about .band-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(18px, 3.4vw, 44px);
}

.page-about .band-metric {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 0;
}

.page-about .band-metric strong {
  display: flex;
  align-items: baseline;
  gap: 3px;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 400;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--white);
}

.page-about .band-unit {
  font-size: 0.44em;
  color: var(--neon);
}

.page-about .band--amber .band-unit {
  color: var(--amber);
}

.page-about .band-metric span {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--silver);
}

/* ---------- 覆盖增长曲线 ---------- */

.page-about .growth-figure {
  margin: 26px 0 0;
  padding: clamp(16px, 2.4vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--r-m);
  background: rgba(11, 15, 14, 0.5);
}

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

.page-about .growth-grid {
  stroke: rgba(159, 176, 172, 0.13);
  stroke-width: 1;
  stroke-dasharray: 3 7;
}

.page-about .growth-axis {
  stroke: rgba(159, 176, 172, 0.26);
  stroke-width: 1;
}

.page-about .growth-area {
  fill: url(#aboutGrowthFill);
}

.page-about .growth-line {
  fill: none;
  stroke: var(--neon);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.page-about .growth-dot {
  fill: var(--ink);
  stroke: var(--neon);
  stroke-width: 2;
}

.page-about .growth-dot--now {
  fill: var(--neon);
  stroke: var(--ink);
}

.page-about .growth-label {
  fill: rgba(159, 176, 172, 0.7);
  font-family: var(--font-mono);
  font-size: 12px;
}

.page-about .growth-tick {
  fill: rgba(242, 246, 245, 0.82);
  font-family: var(--font-mono);
  font-size: 13px;
}

.page-about .growth-caption {
  margin: 12px 0 0;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--silver);
}

/* ---------- 团队分工 ---------- */

.page-about .crew-figure {
  margin-top: 26px;
  padding: clamp(18px, 2.6vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--r-m);
  background: linear-gradient(160deg, rgba(18, 70, 58, 0.42), rgba(11, 15, 14, 0.4));
}

.page-about .crew-title {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--silver);
}

.page-about .crew-blocks {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .crew-block {
  width: 24px;
  height: 24px;
  border-radius: 7px;
  background: rgba(41, 242, 200, 0.86);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.page-about .crew-block--support {
  background: rgba(76, 211, 255, 0.5);
}

.page-about .crew-block:hover {
  transform: translateY(-3px);
  box-shadow: 0 0 0 2px rgba(41, 242, 200, 0.32);
}

.page-about .crew-legend {
  display: grid;
  gap: 8px;
  margin-top: 18px;
}

.page-about .crew-legend p {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(242, 246, 245, 0.76);
}

.page-about .legend-dot {
  flex: none;
  width: 10px;
  height: 10px;
  border-radius: 3px;
}

.page-about .legend-dot--neon {
  background: rgba(41, 242, 200, 0.86);
}

.page-about .legend-dot--blue {
  background: rgba(76, 211, 255, 0.5);
}

/* ---------- 收尾 ---------- */

.page-about .about-next {
  margin-top: var(--about-gap);
  padding: clamp(24px, 3.6vw, 44px);
  border-radius: var(--r-l);
  background:
    radial-gradient(120% 130% at 96% 0%, rgba(255, 106, 43, 0.16), transparent 58%),
    linear-gradient(150deg, rgba(18, 70, 58, 0.78), rgba(11, 15, 14, 0.86));
  border: 1px solid var(--line-strong);
}

.page-about .next-grid {
  display: grid;
  gap: clamp(22px, 3.4vw, 44px);
}

.page-about .next-copy .season-title {
  margin-top: 10px;
}

.page-about .next-copy .season-text:last-child {
  margin-bottom: 0;
}

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

/* ---------- 响应式 ---------- */

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

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

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

@media (min-width: 820px) {
  .page-about .season-inner {
    grid-template-columns: 124px minmax(0, 1fr);
    column-gap: clamp(22px, 3.4vw, 50px);
    align-items: start;
  }

  .page-about .season-index {
    position: sticky;
    top: calc(var(--header-offset) + 20px);
  }

  .page-about .next-grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(196px, 262px);
    align-items: end;
  }

  .page-about .about-hero-side {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: var(--about-shell) minmax(0, 1fr);
    gap: clamp(30px, 4vw, 68px);
  }

  .page-about .about-rail {
    display: block;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .rail-link,
  .page-about .crew-block {
    transition: none;
  }
}