.page-about {
  color: var(--text);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: calc(var(--header-h) + clamp(1.25rem, 3.5vw, 2.25rem)) 0 clamp(2.5rem, 6vw, 4rem);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -10% -10% auto -10%;
  height: 78%;
  z-index: -2;
  background:
    radial-gradient(55% 70% at 12% 0%, rgba(63, 224, 255, .17), transparent 68%),
    radial-gradient(45% 60% at 88% 6%, rgba(245, 184, 75, .13), transparent 70%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(91, 101, 112, .10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(91, 101, 112, .10) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(72% 62% at 50% 18%, #000 0%, transparent 78%);
  mask-image: radial-gradient(72% 62% at 50% 18%, #000 0%, transparent 78%);
  opacity: .75;
  pointer-events: none;
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  margin-top: clamp(1.5rem, 4vw, 2.75rem);
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: .02em;
  margin: .7rem 0 0;
  color: var(--text);
  text-wrap: balance;
}

.page-about .about-hero .lede {
  margin: 1.15rem 0 0;
  max-width: 48ch;
  color: var(--muted);
  line-height: 1.85;
}

.page-about .hero-aside {
  position: relative;
  padding: 1.25rem 1.25rem 1.4rem 1.5rem;
  border: 1px solid rgba(245, 184, 75, .36);
  border-radius: var(--radius);
  background: linear-gradient(158deg, rgba(245, 184, 75, .14), rgba(14, 27, 46, .94) 62%);
  box-shadow: var(--shadow-panel);
}

.page-about .hero-aside::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.15rem;
  bottom: 1.15rem;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--gold-soft), var(--gold));
}

.page-about .aside-mark {
  margin: 0;
  font-size: .74rem;
  letter-spacing: .12em;
  color: var(--gold-soft);
}

.page-about .aside-text {
  margin: .7rem 0 0;
  color: var(--text);
  font-size: .95rem;
  line-height: 1.8;
}

.page-about .aside-link {
  display: inline-block;
  margin-top: 1rem;
  color: var(--cyan-bright);
  font-size: .92rem;
  text-decoration: none;
  border-bottom: 1px solid rgba(122, 240, 255, .5);
  padding-bottom: 2px;
}

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

.page-about .hero-stats {
  list-style: none;
  margin: clamp(1.75rem, 4vw, 2.5rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(91, 101, 112, .35);
  border: 1px solid rgba(91, 101, 112, .35);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .hero-stats li {
  background: rgba(14, 27, 46, .94);
  padding: 1rem 1.05rem 1.1rem;
}

.page-about .stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 3.2vw, 1.85rem);
  line-height: 1.1;
  letter-spacing: .02em;
  color: var(--cyan-bright);
}

.page-about .hero-stats li:nth-child(even) .stat-num {
  color: var(--gold);
}

.page-about .stat-label {
  display: block;
  margin-top: .4rem;
  font-size: .78rem;
  letter-spacing: .04em;
  color: var(--muted);
}

/* ---------- 章节通用 ---------- */
.page-about .about-band {
  padding: clamp(2.75rem, 7vw, 5.25rem) 0;
}

.page-about .about-band--tint {
  background: linear-gradient(180deg, rgba(14, 27, 46, .62), rgba(7, 17, 31, 0));
  border-top: 1px solid rgba(91, 101, 112, .22);
  border-bottom: 1px solid rgba(91, 101, 112, .22);
}

.page-about .band-head {
  max-width: 68ch;
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}

.page-about .band-head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3.6vw, 2.45rem);
  line-height: 1.18;
  letter-spacing: .015em;
  margin: .55rem 0 0;
  color: var(--text);
}

.page-about .band-head .lede {
  margin: .9rem 0 0;
  max-width: 56ch;
  color: var(--muted);
  line-height: 1.85;
}

/* ---------- 编辑部跨栏 ---------- */
.page-about .editorial {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  grid-template-columns: minmax(0, 1fr);
}

.page-about .editorial-note {
  display: grid;
  gap: .85rem;
  align-content: start;
}

.page-about .note-card {
  position: relative;
  padding: .95rem 1rem 1rem;
  border: var(--panel-border);
  border-radius: var(--radius);
  background: rgba(14, 27, 46, .88);
  box-shadow: var(--shadow-panel);
  cursor: default;
  transition: border-color .24s ease, transform .24s ease;
}

.page-about .note-card:hover,
.page-about .note-card:focus,
.page-about .note-card:focus-within {
  border-color: rgba(63, 224, 255, .55);
  transform: translateY(-2px);
  outline: none;
}

.page-about .note-index {
  display: block;
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--cyan);
}

.page-about .note-title {
  margin: .35rem 0 0;
  font-size: .95rem;
  font-weight: 600;
  color: var(--text);
}

.page-about .note-detail {
  margin: 0;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  color: var(--muted);
  font-size: .85rem;
  line-height: 1.75;
  transition: max-height .3s ease, opacity .3s ease, margin-top .3s ease;
}

.page-about .note-card:hover .note-detail,
.page-about .note-card:focus .note-detail,
.page-about .note-card:focus-within .note-detail {
  max-height: 12rem;
  opacity: 1;
  margin-top: .5rem;
}

.page-about .editorial-body h2 {
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3.6vw, 2.45rem);
  line-height: 1.18;
  letter-spacing: .015em;
  margin: 0 0 1.1rem;
  color: var(--text);
}

.page-about .editorial-body p {
  margin: 0 0 1.15em;
  max-width: 62ch;
  color: var(--muted);
  line-height: 1.85;
}

/* ---------- 图片框 ---------- */
.page-about .media-figure {
  margin: clamp(1.5rem, 4vw, 2.25rem) 0 0;
}

.page-about .media-caption {
  margin-top: .7rem;
  font-size: .8rem;
  line-height: 1.7;
  color: var(--muted);
}

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

/* ---------- 四条主线 ---------- */
.page-about .lines-grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.75rem);
}

.page-about .lines-figure {
  padding: 1rem;
  border: var(--panel-border);
  border-radius: var(--radius);
  background:
    radial-gradient(70% 80% at 18% 10%, rgba(63, 224, 255, .10), transparent 70%),
    rgba(14, 27, 46, .9);
  box-shadow: var(--shadow-panel);
}

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

.page-about .lines-svg text {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  fill: var(--muted);
}

.page-about .lines-svg .svg-root {
  fill: var(--cyan-bright);
  font-size: 12px;
  letter-spacing: .12em;
}

.page-about .line-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .9rem;
}

.page-about .line-item {
  position: relative;
  padding: 1.05rem 1.15rem 1.15rem;
  border: 1px solid rgba(91, 101, 112, .35);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(19, 38, 61, .9), rgba(14, 27, 46, .9));
  transition: border-color .24s ease, transform .24s ease;
}

.page-about .line-item:hover {
  border-color: rgba(63, 224, 255, .5);
  transform: translateY(-2px);
}

.page-about .line-code {
  display: block;
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--gold);
}

.page-about .line-item h3 {
  margin: .35rem 0 .45rem;
  font-size: 1.08rem;
  font-weight: 600;
  color: var(--text);
}

.page-about .line-item p {
  margin: 0;
  color: var(--muted);
  font-size: .92rem;
  line-height: 1.8;
}

.page-about .line-link {
  display: inline-block;
  margin-top: .7rem;
  font-size: .85rem;
  color: var(--cyan-bright);
  text-decoration: none;
  border-bottom: 1px solid rgba(122, 240, 255, .45);
  padding-bottom: 1px;
}

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

/* ---------- 赛季时间线 ---------- */
.page-about .season-track {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .6rem;
  margin: 0 0 clamp(1.5rem, 4vw, 2.25rem);
}

.page-about .season-node {
  position: relative;
  z-index: 1;
  display: grid;
  justify-items: start;
  gap: .2rem;
  padding: .85rem .7rem .85rem .8rem;
  border: 1px solid rgba(91, 101, 112, .3);
  border-radius: var(--radius);
  background: rgba(14, 27, 46, .82);
  text-decoration: none;
  color: var(--muted);
  transition: color .2s ease, border-color .2s ease, background .2s ease;
}

.page-about .season-node:hover,
.page-about .season-node:focus-visible {
  color: var(--text);
  border-color: rgba(63, 224, 255, .55);
  background: rgba(19, 38, 61, .95);
}

.page-about .season-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(63, 224, 255, .14);
}

.page-about .season-tag {
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--cyan-bright);
}

.page-about .season-name {
  font-size: .85rem;
  letter-spacing: .02em;
}

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

.page-about .season-list {
  list-style: none;
  margin: clamp(2rem, 5vw, 2.75rem) 0 0;
  padding: 0;
}

.page-about .season-item {
  display: grid;
  gap: .45rem;
  padding: clamp(1rem, 3vw, 1.4rem) 0;
  border-top: 1px solid rgba(91, 101, 112, .3);
  scroll-margin-top: calc(var(--header-h) + 1rem);
}

.page-about .season-item:last-child {
  border-bottom: 1px solid rgba(91, 101, 112, .3);
}

.page-about .season-no {
  font-size: .78rem;
  letter-spacing: .12em;
  color: var(--gold);
}

.page-about .season-item h3 {
  margin: 0 0 .35rem;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
}

.page-about .season-item p {
  margin: 0;
  max-width: 62ch;
  color: var(--muted);
  font-size: .94rem;
  line-height: 1.82;
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  gap: 1rem;
}

.page-about .team-card {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(1.25rem, 3.5vw, 2rem);
  border: var(--panel-border);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow-panel);
}

.page-about .team-card::after {
  content: "";
  position: absolute;
  z-index: -1;
  right: -18%;
  bottom: -55%;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  filter: blur(42px);
  opacity: .55;
  pointer-events: none;
}

.page-about .team-card--cyan::after {
  background: rgba(63, 224, 255, .38);
}

.page-about .team-card--gold::after {
  background: rgba(245, 184, 75, .34);
}

.page-about .team-code {
  margin: 0;
  font-size: .72rem;
  letter-spacing: .14em;
  color: var(--cyan-bright);
}

.page-about .team-card--gold .team-code {
  color: var(--gold-soft);
}

.page-about .team-card h3 {
  margin: .6rem 0 .6rem;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text);
}

.page-about .team-card p {
  margin: 0;
  color: var(--muted);
  font-size: .94rem;
  line-height: 1.85;
}

/* ---------- 质量控制 ---------- */
.page-about .quality-grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.75rem);
}

.page-about .quality-body h2 {
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3.6vw, 2.45rem);
  line-height: 1.18;
  letter-spacing: .015em;
  margin: 0 0 1rem;
  color: var(--text);
}

.page-about .quality-lede {
  margin: 0;
  max-width: 56ch;
  color: var(--muted);
  line-height: 1.85;
}

.page-about .quality-steps {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-about .quality-steps li {
  display: grid;
  grid-template-columns: 2.3rem minmax(0, 1fr);
  gap: .8rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(91, 101, 112, .3);
}

.page-about .step-no {
  font-size: .78rem;
  letter-spacing: .1em;
  color: var(--gold);
  padding-top: .15rem;
}

.page-about .quality-steps h3 {
  margin: 0 0 .3rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.page-about .quality-steps p {
  margin: 0;
  color: var(--muted);
  font-size: .92rem;
  line-height: 1.8;
}

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

/* ---------- 规模 ---------- */
.page-about .scale-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: 1px;
  background: rgba(91, 101, 112, .32);
  border: 1px solid rgba(91, 101, 112, .32);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .scale-item {
  background: var(--panel);
  padding: clamp(1.05rem, 3vw, 1.6rem);
}

.page-about .scale-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  line-height: 1.1;
  letter-spacing: .02em;
  color: var(--cyan-bright);
}

.page-about .scale-item:nth-child(even) .scale-num {
  color: var(--gold);
}

.page-about .scale-label {
  display: block;
  margin-top: .45rem;
  font-size: .85rem;
  letter-spacing: .04em;
  color: var(--text);
}

.page-about .scale-item p {
  margin: .55rem 0 0;
  color: var(--muted);
  font-size: .88rem;
  line-height: 1.75;
}

/* ---------- 服务支持 ---------- */
.page-about .support-panel {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.75rem);
  padding: clamp(1.5rem, 4vw, 2.75rem);
  border: 1px solid rgba(245, 184, 75, .32);
  border-radius: var(--radius);
  background: linear-gradient(136deg, rgba(19, 38, 61, .96), rgba(7, 17, 31, .96) 58%);
  box-shadow: var(--shadow-panel);
}

.page-about .support-panel::before {
  content: "";
  position: absolute;
  z-index: -1;
  right: -12%;
  top: -40%;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(245, 184, 75, .22), transparent 68%);
  pointer-events: none;
}

.page-about .support-copy h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.4vw, 2.3rem);
  line-height: 1.18;
  letter-spacing: .015em;
  margin: .55rem 0 1rem;
  color: var(--text);
}

.page-about .support-copy p {
  margin: 0 0 1em;
  max-width: 56ch;
  color: var(--muted);
  line-height: 1.85;
}

.page-about .support-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.4rem;
}

.page-about .support-facts {
  margin: 0;
  display: grid;
  gap: .95rem;
  align-content: start;
}

.page-about .support-facts dt {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .14em;
  color: var(--gold-soft);
}

.page-about .support-facts dd {
  margin: .25rem 0 0;
  color: var(--text);
  font-size: .94rem;
  line-height: 1.6;
  overflow-wrap: anywhere;
}

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

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

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

@media (min-width: 760px) {
  .page-about .season-track {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: .45rem;
  }

  .page-about .season-track::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 1.15rem;
    height: 1px;
    background: linear-gradient(90deg, rgba(63, 224, 255, .5), rgba(245, 184, 75, .5));
    z-index: 0;
  }

  .page-about .season-node {
    padding: .8rem .55rem .8rem .65rem;
  }

  .page-about .season-item {
    grid-template-columns: 72px minmax(0, 1fr);
    gap: clamp(1rem, 3vw, 2rem);
  }

  .page-about .season-no {
    padding-top: .2rem;
  }
}

@media (min-width: 900px) {
  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.25rem;
  }

  .page-about .support-panel {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  }

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

@media (min-width: 1024px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(240px, .9fr);
    align-items: end;
    gap: clamp(2rem, 5vw, 4rem);
  }

  .page-about .editorial {
    grid-template-columns: minmax(210px, 260px) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 3.75rem);
  }

  .page-about .editorial-note {
    position: sticky;
    top: calc(var(--header-h) + 1.25rem);
  }

  .page-about .lines-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.02fr);
    align-items: start;
    gap: clamp(2rem, 5vw, 3.5rem);
  }

  .page-about .quality-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
    align-items: start;
  }

  .page-about .quality-figure {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
  }
}