/* ===== 看台自述 / about ===== */

.page-about {
  background: var(--ink-900);
  color: var(--mist-100);
  overflow-x: clip;
}

/* --- 面包屑 --- */
.page-about .about-crumbs {
  padding-top: 16px;
}

.page-about .about-crumbs .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--steel-500);
}

.page-about .about-crumbs .crumbs a {
  color: var(--steel-500);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .about-crumbs .crumbs a:hover,
.page-about .about-crumbs .crumbs a:focus-visible {
  color: var(--lime-400);
  border-bottom-color: var(--lime-line);
}

/* --- 通用小标题 --- */
.page-about .eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--lime-400);
}

/* --- 首屏 --- */
.page-about .about-lead {
  position: relative;
  padding: clamp(26px, 5vw, 54px) 0 clamp(34px, 6vw, 74px);
}

.page-about .about-lead__grid {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
}

.page-about h1 {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(36px, 8.4vw, 76px);
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--white);
  text-wrap: balance;
}

.page-about h1 mark {
  background: linear-gradient(transparent 58%, rgba(183, 243, 74, 0.32) 58%);
  color: inherit;
  padding: 0 0.06em;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}

.page-about .about-lead__lede {
  max-width: 46ch;
  margin: 0 0 15px;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: rgba(233, 241, 238, 0.78);
}

.page-about .about-lead__lede:last-of-type {
  margin-bottom: 0;
}

.page-about .about-facts {
  list-style: none;
  margin: 28px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--line-soft);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 14px;
}

.page-about .about-facts__n {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.6vw, 27px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--lime-400);
}

.page-about .about-facts__l {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--steel-500);
}

.page-about .about-lead__fig {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
}

/* --- 区块标题 --- */
.page-about .about-head {
  max-width: 62ch;
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-about h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 4.8vw, 46px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-about .about-head__lede {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(233, 241, 238, 0.72);
}

/* --- 时间线 --- */
.page-about .about-track {
  padding: clamp(34px, 6vw, 74px) 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .tl {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .tl__item {
  position: relative;
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  column-gap: 14px;
  padding-bottom: 24px;
}

.page-about .tl__node {
  position: relative;
  padding-top: 8px;
  display: flex;
  justify-content: center;
}

.page-about .tl__node span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--lime-400);
  box-shadow: 0 0 0 5px rgba(183, 243, 74, 0.09);
}

.page-about .tl__node::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 27px;
  bottom: -24px;
  width: 1px;
  transform: translateX(-50%);
  background: linear-gradient(to bottom, var(--lime-line), var(--line-soft));
}

.page-about .tl__item:last-child .tl__node::after {
  content: none;
}

.page-about .tl__card {
  background: var(--ink-800);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  padding: 20px 20px 22px;
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .tl__item:hover .tl__card,
.page-about .tl__item:focus-within .tl__card {
  transform: translateY(-3px);
  border-color: var(--lime-line);
  background: var(--ink-700);
}

.page-about .tl__year {
  display: inline-block;
  margin: 0 0 13px;
  padding: 3px 11px;
  border-radius: var(--r-pill);
  background: var(--lime-400);
  color: var(--ink-900);
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.page-about .tl__card h3 {
  margin: 0 0 10px;
  font-size: clamp(17px, 2.2vw, 21px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .tl__card p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.76;
  color: rgba(233, 241, 238, 0.74);
}

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

.page-about .tl__ver {
  color: var(--flare-300);
  font-weight: 700;
}

.page-about .tl__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 13px;
}

.page-about .about-track__more {
  margin: 6px 0 0;
}

.page-about .about-track__more a,
.page-about .about-method__more a,
.page-about .about-creed__link {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--lime-400);
  text-decoration: none;
  border-bottom: 1px solid var(--lime-line);
  padding-bottom: 3px;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .about-track__more a:hover,
.page-about .about-track__more a:focus-visible,
.page-about .about-method__more a:hover,
.page-about .about-method__more a:focus-visible,
.page-about .about-creed__link:hover,
.page-about .about-creed__link:focus-visible {
  color: var(--lime-300);
  border-bottom-color: var(--lime-300);
}

/* --- 引言过渡 --- */
.page-about .about-creed {
  padding: clamp(32px, 6vw, 70px) 0;
  background: var(--ink-800);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-creed__line {
  margin: 0 0 16px;
  max-width: 24ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 5.2vw, 50px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-about .about-creed__line strong {
  font-weight: 800;
  color: var(--lime-400);
}

.page-about .about-creed__sub {
  margin: 0 0 20px;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(233, 241, 238, 0.7);
}

/* --- 团队 --- */
.page-about .about-team {
  padding: clamp(36px, 6vw, 78px) 0;
}

.page-about .team__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}

.page-about .team__chips a {
  display: inline-block;
  padding: 7px 15px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-mid);
  color: var(--mist-100);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: color 0.18s var(--ease), background 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .team__chips a:hover,
.page-about .team__chips a:focus-visible {
  color: var(--ink-900);
  background: var(--lime-300);
  border-color: var(--lime-300);
}

.page-about .team__grid {
  display: grid;
  gap: 14px;
}

.page-about .role {
  position: relative;
  padding: 22px 20px 20px;
  background: var(--ink-800);
  border: 1px solid var(--line-soft);
  border-left: 2px solid var(--lime-line);
  border-radius: var(--r-sm) var(--r-md) var(--r-md) var(--r-sm);
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .role:hover {
  transform: translateY(-3px);
  border-color: var(--line-mid);
  border-left-color: var(--lime-400);
}

.page-about .role:target {
  background: var(--ink-700);
  border-left-color: var(--lime-400);
  border-color: var(--lime-line);
}

.page-about .role__no {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--steel-500);
}

.page-about .role h3 {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .role p {
  margin: 0 0 10px;
  font-size: 14.5px;
  line-height: 1.76;
  color: rgba(233, 241, 238, 0.74);
}

.page-about .role p.role__out {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line-soft);
  font-size: 13px;
  line-height: 1.6;
  color: var(--lime-400);
}

.page-about .team__fig {
  margin: 22px 0 0;
  border-radius: var(--r-md);
  overflow: hidden;
}

/* --- 长期跟队方法 --- */
.page-about .about-method {
  padding: clamp(36px, 6vw, 78px) 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-method__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-about .method {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
}

.page-about .method li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 7px;
  padding: 18px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .method li:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .method__k {
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--lime-400);
}

.page-about .method h3 {
  margin: 0 0 6px;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--white);
}

.page-about .method p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.74;
  color: rgba(233, 241, 238, 0.72);
}

.page-about .about-method__more {
  margin: 22px 0 0;
}

.page-about .about-method__fig {
  margin: 0;
  border-radius: var(--r-md);
  overflow: hidden;
}

/* --- 内容共建（雾白区） --- */
.page-about .about-community {
  padding: clamp(36px, 6vw, 78px) 0;
  background: var(--mist-100);
  color: var(--ink-900);
}

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

.page-about .about-community h2 {
  color: var(--ink-900);
}

.page-about .about-community .about-head__lede {
  color: rgba(11, 31, 26, 0.7);
}

.page-about .comm__grid {
  display: grid;
  gap: 16px;
}

.page-about .comm__card {
  padding: 22px 20px;
  background: var(--white);
  border: 1px solid rgba(11, 31, 26, 0.12);
  border-radius: var(--r-md);
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .comm__card:hover {
  transform: translateY(-3px);
  border-color: rgba(11, 31, 26, 0.28);
}

.page-about .comm__card h3 {
  margin: 0 0 9px;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink-900);
}

.page-about .comm__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.74;
  color: rgba(11, 31, 26, 0.74);
}

.page-about .comm__card .mono {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--ink-800);
}

/* --- 联系与合作 --- */
.page-about .about-cta {
  padding: clamp(36px, 6vw, 78px) 0 clamp(44px, 7vw, 92px);
}

.page-about .about-cta__box {
  position: relative;
  display: grid;
  gap: 22px;
  padding: clamp(24px, 4.4vw, 46px);
  background: var(--ink-800);
  border: 1px solid var(--lime-line);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .about-cta__box::after {
  content: "";
  position: absolute;
  right: -70px;
  top: -90px;
  width: 230px;
  height: 280px;
  background: linear-gradient(160deg, rgba(183, 243, 74, 0.2), transparent 72%);
  transform: skewX(-18deg);
  pointer-events: none;
}

.page-about .about-cta__copy {
  position: relative;
}

.page-about .about-cta__copy h2 {
  margin: 0 0 12px;
  font-size: clamp(24px, 4vw, 38px);
}

.page-about .about-cta__copy p {
  margin: 0;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(233, 241, 238, 0.76);
}

.page-about .about-cta__acts {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-cta__meta {
  position: relative;
  margin: 0;
  padding-top: 18px;
  border-top: 1px dashed var(--line-soft);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--steel-500);
}

.page-about .about-cta__meta .mono {
  font-family: var(--font-mono);
  color: var(--mist-100);
  word-break: break-all;
}

/* --- 响应式 --- */
@media (min-width: 560px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .method li {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 20px;
    align-items: start;
  }

  .page-about .method__k {
    padding-top: 3px;
  }
}

@media (min-width: 700px) {
  .page-about .team__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .comm__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

@media (min-width: 860px) {
  .page-about .about-cta__box {
    grid-template-columns: minmax(0, 1.25fr) auto;
    align-items: center;
    gap: 30px;
  }

  .page-about .about-cta__meta {
    grid-column: 1 / -1;
  }

  .page-about .about-cta__acts {
    justify-content: flex-end;
  }
}

@media (min-width: 940px) {
  .page-about .about-lead__grid {
    grid-template-columns: minmax(0, 1.03fr) minmax(0, 0.97fr);
    align-items: start;
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .about-method__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: start;
  }

  .page-about .tl__item {
    grid-template-columns: 34px minmax(0, 1fr);
    column-gap: 22px;
    padding-bottom: 30px;
  }

  .page-about .tl__node::after {
    bottom: -30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl__card,
  .page-about .role,
  .page-about .comm__card {
    transition: none;
  }

  .page-about .tl__item:hover .tl__card,
  .page-about .tl__item:focus-within .tl__card,
  .page-about .role:hover,
  .page-about .comm__card:hover {
    transform: none;
  }
}