.page-about {
  --about-pad: clamp(18px, 2.4vw, 28px);
  --about-gap: clamp(22px, 3.4vw, 40px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-bottom: clamp(34px, 6vw, 74px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -18% -12% auto -12%;
  height: 620px;
  background:
    radial-gradient(58% 68% at 20% 16%, rgba(55, 230, 200, .16), transparent 68%),
    radial-gradient(44% 58% at 90% 4%, rgba(255, 106, 43, .13), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    to bottom,
    var(--line-2) 0 1px,
    transparent 1px 92px
  );
  opacity: .55;
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--about-gap);
  align-items: center;
  padding-top: clamp(18px, 3vw, 34px);
}

.page-about .about-hero__main {
  min-width: 0;
}

.page-about .about-hero h1 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(30px, 6.4vw, 56px);
  line-height: 1.05;
  letter-spacing: -.022em;
  margin: 12px 0 0;
  max-width: 22ch;
}

.page-about .about-hero__lede {
  margin: 18px 0 0;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(244, 251, 248, .82);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--ink-800);
  box-shadow: var(--shadow-card);
}

.page-about .about-hero__figure .figure__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- 首屏数据条 ---------- */
.page-about .about-facts {
  position: relative;
  z-index: 1;
  margin: clamp(30px, 5vw, 52px) 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-2);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-facts__item {
  background: rgba(14, 18, 17, .78);
  padding: 16px 18px;
}

.page-about .about-facts__key {
  margin: 0 0 6px;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--gray);
}

.page-about .about-facts__val {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-family: var(--font-num);
  font-size: 16px;
  color: var(--white);
}

.page-about .about-facts__val .num {
  color: var(--lime);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-block {
  padding-block: clamp(46px, 7vw, 92px);
}

.page-about .about-block__head {
  display: grid;
  gap: 12px;
  max-width: 780px;
  margin-bottom: clamp(24px, 4vw, 44px);
}

.page-about .about-block__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(24px, 3.8vw, 38px);
  line-height: 1.12;
  letter-spacing: -.018em;
  margin: 0;
}

.page-about .about-block__lede {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--gray);
}

/* ---------- 团队构成 ---------- */
.page-about .roster {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-2);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .roster__item {
  position: relative;
  background: var(--ink-800);
  padding: var(--about-pad);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .roster__item::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--neon);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--dur) var(--ease);
}

.page-about .roster__item:hover,
.page-about .roster__item:focus-visible {
  background: var(--ink-700);
  outline: none;
}

.page-about .roster__item:focus-visible {
  box-shadow: inset 0 0 0 2px var(--neon);
}

.page-about .roster__item:hover::after,
.page-about .roster__item:focus-visible::after {
  transform: scaleY(1);
}

.page-about .roster__no {
  display: block;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--neon);
}

.page-about .roster__name {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -.01em;
  margin: 10px 0 0;
}

.page-about .roster__count {
  margin: 6px 0 0;
  font-family: var(--font-num);
  font-size: 13px;
  color: var(--gray);
}

.page-about .roster__count .num {
  color: var(--lime);
}

.page-about .roster__text {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(244, 251, 248, .74);
}

.page-about .about-team__figure {
  margin: clamp(26px, 4vw, 46px) 0 0;
  max-width: 860px;
}

.page-about .about-team__figure .figure__img,
.page-about .about-flow__figure .figure__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
}

/* ---------- 更新节奏 ---------- */
.page-about .about-flow {
  background: var(--ink-800);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-2);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .flow__item {
  background: var(--ink-800);
  padding: var(--about-pad);
  transition: background var(--dur) var(--ease);
}

.page-about .flow__item:hover {
  background: var(--ink-700);
}

.page-about .flow__no {
  display: inline-block;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--ink-900);
  background: var(--neon);
  border-radius: var(--r-sm);
  padding: 2px 8px;
}

.page-about .flow__title {
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -.01em;
  margin: 12px 0 0;
}

.page-about .flow__text {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(244, 251, 248, .72);
}

.page-about .about-flow__figure {
  margin: clamp(26px, 4vw, 44px) auto 0;
  max-width: 780px;
}

/* ---------- 覆盖范围 ---------- */
.page-about .cover-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .cover-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 6px 16px;
  padding: 16px 18px;
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .cover-item:hover,
.page-about .cover-item:focus-visible {
  border-color: var(--neon);
  outline: none;
  transform: translateY(-2px);
}

.page-about .cover-item:focus-visible {
  box-shadow: 0 0 0 2px rgba(55, 230, 200, .45);
}

.page-about .cover-item__name {
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -.01em;
}

.page-about .cover-item__val {
  color: var(--lime);
  text-align: right;
}

.page-about .cover-item__track {
  grid-column: 1 / -1;
  display: block;
  height: 6px;
  background: var(--ink-700);
  border-radius: 999px;
  overflow: hidden;
}

.page-about .cover-item__fill {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--neon), var(--lime));
}

.page-about .cover-item__fill--channels { width: 62%; }
.page-about .cover-item__fill--regions  { width: 100%; }
.page-about .cover-item__fill--seasons  { width: 48%; }
.page-about .cover-item__fill--devices  { width: 30%; }

.page-about .cover-item__note {
  grid-column: 1 / -1;
  font-size: 13px;
  line-height: 1.6;
  color: var(--gray);
}

/* ---------- 版本演进 ---------- */
.page-about .about-version__split {
  display: grid;
  gap: var(--about-gap);
}

.page-about .ver-rail {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .ver-rail::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--neon), rgba(55, 230, 200, .08));
}

.page-about .ver-rail__item {
  position: relative;
  padding: 0 0 clamp(24px, 3.4vw, 38px) 38px;
}

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

.page-about .ver-rail__dot {
  position: absolute;
  left: 0;
  top: 6px;
  width: 21px;
  height: 21px;
  border-radius: 50%;
  border: 2px solid var(--neon);
  background: var(--ink-900);
  box-shadow: 0 0 0 4px rgba(55, 230, 200, .1);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .ver-rail__item:hover .ver-rail__dot,
.page-about .ver-rail__item:focus-visible .ver-rail__dot {
  background: var(--neon);
  box-shadow: 0 0 0 6px rgba(55, 230, 200, .18);
}

.page-about .ver-rail__item:focus-visible {
  outline: none;
}

.page-about .ver-rail__ver {
  display: inline-block;
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--neon);
}

.page-about .ver-rail__title {
  font-family: var(--font-head);
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 800;
  letter-spacing: -.014em;
  margin: 6px 0 0;
}

.page-about .ver-rail__text {
  margin: 10px 0 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.76;
  color: rgba(244, 251, 248, .76);
}

.page-about .ver-rail__tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 0;
  padding: 0;
}

.page-about .about-version__aside {
  align-self: start;
}

.page-about .about-version__aside .about-version__aside-text {
  margin: 12px 0 20px;
  font-size: 15px;
  line-height: 1.76;
}

/* ---------- 合作生态 ---------- */
.page-about .eco-grid {
  align-items: start;
}

.page-about .eco-grid .card__title {
  margin: 10px 0 0;
}

.page-about .eco-grid__num {
  margin: 12px 0 0;
  color: var(--lime);
  line-height: 1;
}

/* ---------- 支持与工作方式 ---------- */
.page-about .about-support-block {
  padding-bottom: clamp(56px, 8vw, 104px);
}

.page-about .about-support {
  display: grid;
  gap: clamp(24px, 3.6vw, 44px);
  padding: clamp(26px, 4vw, 48px);
  background: var(--paper);
  color: var(--ink-900);
  border-radius: var(--r-md);
  border: 1px solid var(--line-ink);
}

.page-about .about-support__eyebrow {
  color: var(--ink-700);
}

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

.page-about .about-support__text {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.82;
  color: rgba(6, 35, 28, .8);
}

.page-about .about-support__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-support__meta {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-ink);
  border: 1px solid var(--line-ink);
  border-radius: var(--r-sm);
  overflow: hidden;
  align-self: start;
}

.page-about .about-support__meta-item {
  background: var(--paper);
  padding: 14px 16px;
}

.page-about .about-support__meta-key {
  display: block;
  font-size: 13px;
  color: rgba(6, 35, 28, .62);
}

.page-about .about-support__meta-val {
  display: block;
  margin-top: 6px;
  font-size: 20px;
  color: var(--ink-900);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .roster {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .page-about .about-facts__item {
    padding: 18px 22px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  }

  .page-about .about-version__split {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-support {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .page-about .roster {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .flow {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .roster__item,
  .page-about .roster__item::after,
  .page-about .flow__item,
  .page-about .cover-item,
  .page-about .ver-rail__dot {
    transition: none;
  }

  .page-about .cover-item:hover,
  .page-about .cover-item:focus-visible {
    transform: none;
  }
}