.page-about {
  --about-gap: clamp(44px, 7vw, 88px);
  --about-cut: 12px;
  display: block;
  color: var(--ink-900);
  font-family: var(--font-body);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-about .crumbs {
  margin: 20px 0 0;
  font-size: 13px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(26px, 5vw, 52px) 0 clamp(24px, 4vw, 38px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: clamp(26px, 5vw, 52px);
  left: 0;
  width: 5px;
  height: 74px;
  background: var(--brand-red);
  clip-path: polygon(0 0, 100% 0, 100% 80%, 0 100%);
}

.page-about .about-hero__kicker {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  margin: 0 0 16px 16px;
  font-size: 13px;
}

.page-about .about-hero__since {
  color: var(--cool-gray);
  letter-spacing: 0.04em;
}

.page-about .about-hero h1 {
  margin: 0 0 18px 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 7vw, 62px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  max-width: 17ch;
}

.page-about .about-hero__lead {
  margin: 0 0 28px 16px;
  max-width: 38em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0 0 0 16px;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--about-cut);
  overflow: hidden;
  max-width: 620px;
}

.page-about .about-hero__facts li {
  background: var(--cream-100);
  padding: 12px 14px 13px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--cool-gray);
}

.page-about .about-hero__facts .mono {
  display: block;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--red-deep);
  margin-bottom: 2px;
}

/* ---------- 章节标题组 ---------- */
.page-about .about-three,
.page-about .about-team,
.page-about .about-flow,
.page-about .about-season,
.page-about .about-eco,
.page-about .about-contact {
  padding: var(--about-gap) 0 0;
}

.page-about .about-three h2,
.page-about .about-team h2,
.page-about .about-flow h2,
.page-about .about-season h2,
.page-about .about-eco h2,
.page-about .about-contact h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 4.4vw, 40px);
  line-height: 1.18;
  letter-spacing: -0.02em;
}

.page-about .tri__title,
.page-about .flow__title,
.page-about .season__t,
.page-about .about-contact h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(17px, 2.2vw, 21px);
  line-height: 1.35;
}

/* ---------- 三件事 ---------- */
.page-about .about-three .prose {
  max-width: 38em;
  margin: 0 0 4px;
  font-size: 15px;
  line-height: 1.85;
}

.page-about .tri {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: 2px solid var(--ink-900);
}

.page-about .tri__item {
  padding: 22px 0 24px;
  border-bottom: 1px solid var(--line);
}

.page-about .tri__idx {
  display: block;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--brand-red);
  margin-bottom: 8px;
}

.page-about .tri__text {
  margin: 0;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.85;
}

/* ---------- 团队构成 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: 30px;
  margin-top: 22px;
}

.page-about .about-team__body .prose {
  max-width: 38em;
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.85;
}

.page-about .about-team__num {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 6px 14px;
  margin: 26px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
}

.page-about .team-num {
  font-size: clamp(56px, 13vw, 88px);
  line-height: 0.86;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--deep-blue);
  font-family: var(--font-mono);
}

.page-about .team-num__lab {
  max-width: 13em;
  font-size: 13px;
  line-height: 1.55;
  color: var(--cool-gray);
}

.page-about .stack {
  display: flex;
  height: 26px;
  margin: 22px 0 0;
  border-radius: 3px;
  overflow: hidden;
  background: var(--cream-100);
}

.page-about .stack__seg {
  display: block;
  height: 100%;
  opacity: 1;
  transition: opacity 0.2s var(--ease);
}

.page-about .stack:hover .stack__seg {
  opacity: 0.4;
}

.page-about .stack .stack__seg:hover {
  opacity: 1;
}

.page-about .stack__seg--eng { width: 35.7%; background: var(--deep-blue); }
.page-about .stack__seg--edit { width: 21.4%; background: var(--brand-red); }
.page-about .stack__seg--prod { width: 16.7%; background: var(--cyan); }
.page-about .stack__seg--ops { width: 14.3%; background: var(--amber); }
.page-about .stack__seg--other { width: 11.9%; background: var(--cool-gray); }

.page-about .legend {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px 20px;
  font-size: 14px;
}

.page-about .legend__item {
  display: flex;
  align-items: center;
  gap: 8px;
  line-height: 1.4;
}

.page-about .legend__swatch {
  flex: none;
  width: 10px;
  height: 10px;
  border-radius: 2px;
}

.page-about .legend__swatch--eng { background: var(--deep-blue); }
.page-about .legend__swatch--edit { background: var(--brand-red); }
.page-about .legend__swatch--prod { background: var(--cyan); }
.page-about .legend__swatch--ops { background: var(--amber); }
.page-about .legend__swatch--other { background: var(--cool-gray); }

.page-about .legend__item b {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--ink-900);
}

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

.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 9 / 7;
  object-fit: cover;
  border-radius: 0 var(--about-cut) 0 var(--about-cut);
  background: var(--cream-100);
}

.page-about .about-media__cap {
  margin: 10px 0 0;
  font-size: 12.5px;
  line-height: 1.6;
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
  color: var(--cool-gray);
}

/* ---------- 刷新流程 ---------- */
.page-about .about-flow__lead {
  max-width: 38em;
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
}

.page-about .flow {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .flow__step {
  position: relative;
  padding: 22px 22px 28px;
  background: var(--cream-100);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-about .flow__step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--deep-blue);
}

.page-about .flow__num {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cream-050);
  background: var(--brand-red);
  padding: 3px 9px 4px;
  margin-bottom: 12px;
}

.page-about .flow__title {
  color: var(--ink-900);
}

.page-about .flow__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
}

.page-about .about-flow__fig {
  margin: 30px 0 0;
}

.page-about .about-flow__fig img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--about-cut);
  background: var(--deep-blue);
}

.page-about .about-flow__more {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--cool-gray);
}

.page-about .about-flow__more a {
  color: var(--red-deep);
  font-weight: 700;
}

/* ---------- 赛季时间线 ---------- */
.page-about .about-season__lead {
  max-width: 38em;
  margin: 0 0 28px;
  font-size: 15px;
  line-height: 1.85;
}

.page-about .season {
  list-style: none;
  margin: 0;
  padding: clamp(26px, 4vw, 44px) clamp(20px, 3vw, 42px);
  background: var(--deep-blue);
  border-radius: var(--about-cut);
  display: grid;
  gap: 0;
}

.page-about .season__node {
  position: relative;
  padding: 0 0 26px 26px;
  border-left: 1px solid rgba(246, 241, 231, 0.24);
}

.page-about .season__node:last-child {
  padding-bottom: 0;
}

.page-about .season__dot {
  position: absolute;
  left: -5px;
  top: 5px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(34, 211, 197, 0.18);
}

.page-about .season__dot::after {
  content: "";
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 1px solid rgba(34, 211, 197, 0.45);
  animation: about-pulse 2.4s var(--ease) infinite;
}

@keyframes about-pulse {
  0% { transform: scale(0.6); opacity: 0.9; }
  100% { transform: scale(1.7); opacity: 0; }
}

.page-about .season__k {
  margin: 0 0 5px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-about .season__t {
  margin: 0 0 6px;
  color: var(--cream-050);
}

.page-about .season__d {
  margin: 0;
  max-width: 30em;
  font-size: 13.5px;
  line-height: 1.75;
  color: rgba(246, 241, 231, 0.76);
}

/* ---------- 合作生态 ---------- */
.page-about .eco__stats {
  display: grid;
  gap: 1px;
  margin: 0 0 26px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .eco__stat {
  background: var(--cream-050);
  padding: 18px 0;
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.page-about .eco__num {
  font-size: clamp(30px, 5vw, 44px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--brand-red);
  min-width: 2.6ch;
}

.page-about .eco__lab {
  font-size: 14px;
  line-height: 1.55;
  color: var(--ink-900);
}

.page-about .about-eco__text {
  max-width: 38em;
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
}

.page-about .about-eco__fig {
  margin: 30px 0 0;
}

.page-about .about-eco__fig img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--about-cut);
  background: var(--cream-100);
}

/* ---------- 联络 ---------- */
.page-about .about-contact__grid {
  display: grid;
  gap: 20px;
  margin-top: 24px;
}

.page-about .about-contact__col {
  padding: 24px 24px 30px;
  background: var(--cream-100);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-about .about-contact__col p {
  margin: 0 0 14px;
  max-width: 34em;
  font-size: 14.5px;
  line-height: 1.8;
}

.page-about .about-contact__col p:last-child {
  margin-bottom: 0;
}

.page-about .about-contact__col a {
  color: var(--red-deep);
  font-weight: 700;
}

.page-about .cinfo {
  margin: 18px 0 16px;
  padding: 0;
}

.page-about .cinfo > div {
  display: grid;
  grid-template-columns: 5.6em minmax(0, 1fr);
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.6;
}

.page-about .cinfo dt {
  font-size: 13px;
  color: var(--cool-gray);
}

.page-about .cinfo dd {
  margin: 0;
  min-width: 0;
  word-break: break-word;
  color: var(--ink-900);
}

.page-about .cinfo__mono {
  font-family: var(--font-mono);
  letter-spacing: 0.01em;
}

.page-about .about-contact__link {
  margin: 0;
  font-size: 14px;
}

.page-about .about-contact__note {
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--cool-gray);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-hero__facts li {
    padding: 14px 16px 15px;
  }

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

  .page-about .flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
}

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

  .page-about .tri__item {
    border-top: 2px solid var(--ink-900);
    border-bottom: 0;
    padding: 20px 30px 8px 0;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-contact__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px;
  }
}

@media (min-width: 820px) {
  .page-about .eco__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .eco__stat {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding: 24px 28px 24px 0;
  }
}

@media (min-width: 1024px) {
  .page-about .season {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 0 20px;
    padding: clamp(30px, 3vw, 46px) clamp(24px, 3vw, 40px);
  }

  .page-about .season__node {
    padding: 30px 0 0;
    border-left: 0;
    border-top: 1px solid rgba(246, 241, 231, 0.24);
  }

  .page-about .season__dot {
    left: 0;
    top: -5px;
  }

  .page-about .season__d {
    font-size: 13px;
  }
}

@media (min-width: 1200px) {
  .page-about .flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .season__dot::after {
    animation: none;
    opacity: 0;
  }

  .page-about .stack__seg {
    transition: none;
  }
}