.page-about {
  --about-panel: linear-gradient(165deg, rgba(22, 36, 61, 0.94), rgba(15, 26, 46, 0.96));
  --about-glow: rgba(46, 242, 208, 0.35);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(1.4rem, 3.5vw, 2.4rem) 0 clamp(2.4rem, 5vw, 4rem);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -12%;
  right: 0;
  width: min(680px, 100%);
  height: 76%;
  background:
    radial-gradient(circle at 26% 24%, rgba(46, 242, 208, 0.16), transparent 62%),
    linear-gradient(142deg, rgba(255, 106, 43, 0.16), transparent 58%);
  clip-path: polygon(16% 0, 100% 0, 100% 76%, 0 100%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero .container {
  position: relative;
  z-index: 1;
}

.page-about .about-hero h1 {
  margin: 0.65rem 0 0;
  max-width: 17ch;
  font-size: clamp(2.2rem, 7.6vw, 4.4rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hl {
  color: var(--cyan);
  text-shadow: 0 0 30px var(--about-glow);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.8rem);
  margin-top: clamp(1.6rem, 4vw, 2.6rem);
}

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

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.6rem;
}

/* 控制台 */
.page-about .about-console {
  display: grid;
  gap: 1rem;
  min-width: 0;
  padding: clamp(1rem, 2.6vw, 1.4rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(158deg, rgba(22, 36, 61, 0.9), rgba(15, 26, 46, 0.97));
  box-shadow: inset 0 1px 0 rgba(199, 208, 218, 0.06);
}

.page-about .about-console__label {
  margin: 0 0 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-about .about-years {
  display: grid;
  gap: 0.1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-years a {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  align-items: baseline;
  gap: 0.55rem;
  padding: 0.45rem 0.6rem 0.45rem 0.8rem;
  border-left: 2px solid var(--line-strong);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-years__y {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-years__t {
  font-size: 0.78rem;
  color: var(--steel);
  overflow-wrap: anywhere;
}

.page-about .about-years a:hover,
.page-about .about-years a:focus-visible {
  border-left-color: var(--cyan);
  background: linear-gradient(90deg, rgba(46, 242, 208, 0.13), transparent);
  transform: translateX(3px);
}

.page-about .about-years a:hover .about-years__t,
.page-about .about-years a:focus-visible .about-years__t {
  color: var(--paper);
}

.page-about .about-stack {
  display: grid;
  gap: 0.7rem;
  min-width: 0;
}

.page-about .about-file {
  position: relative;
  min-width: 0;
  padding: 1rem 1.1rem 1.05rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(7, 13, 24, 0.72);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-file::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 44%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--cyan));
  opacity: 0.75;
}

.page-about .about-file:hover {
  border-color: var(--line-cyan);
  transform: translateY(-2px);
}

.page-about .about-file__k {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.45rem;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-file__k span {
  font-size: 0.85rem;
  color: var(--orange);
}

.page-about .about-file__t {
  margin: 0.4rem 0 0.3rem;
  font-size: 1rem;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-file p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.72;
  color: var(--steel);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  display: grid;
  margin-top: clamp(1.4rem, 3vw, 2rem);
}

.page-about .about-tl {
  position: relative;
  display: grid;
  gap: 0.3rem 1.4rem;
  padding: 1.15rem 0 1.15rem 1.5rem;
  border-left: 1px solid var(--line-strong);
  scroll-margin-top: calc(var(--header-h) + 24px);
  transition: background var(--dur) var(--ease);
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 1.7rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 12px var(--about-glow);
}

.page-about .about-tl:hover {
  background: linear-gradient(90deg, rgba(46, 242, 208, 0.07), transparent 72%);
}

.page-about .about-tl__year {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  font-family: var(--font-mono);
}

.page-about .about-tl__num {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: 0.04em;
}

.page-about .about-tl__ver {
  font-size: 0.75rem;
  color: var(--orange);
}

.page-about .about-tl__body h3 {
  margin: 0 0 0.35rem;
  font-size: 1.08rem;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-tl__body p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--steel);
}

/* ---------- 图片容器 ---------- */
.page-about .about-figure {
  margin: clamp(1.6rem, 4vw, 2.4rem) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--ink-800);
  overflow: hidden;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-figure .media-caption {
  margin: 0;
  padding: 0.7rem 1rem 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  line-height: 1.6;
  color: var(--steel);
}

/* ---------- 数据能力 ---------- */
.page-about .about-cap__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 1rem;
  margin-top: clamp(1.4rem, 3vw, 2rem);
}

.page-about .about-cap__item {
  position: relative;
  min-width: 0;
  padding: 1.3rem 1.15rem 1.4rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--about-panel);
  overflow: hidden;
}

.page-about .about-cap__item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), transparent 82%);
}

.page-about .about-cap__item:nth-child(even)::before {
  background: linear-gradient(90deg, var(--orange), transparent 82%);
}

.page-about .about-cap__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.9rem, 4.2vw, 2.7rem);
  font-weight: 700;
  line-height: 1;
  color: var(--paper);
  text-shadow: 0 0 26px var(--about-glow);
}

.page-about .about-cap__num span {
  margin-left: 0.15rem;
  font-size: 0.9rem;
  color: var(--cyan);
  text-shadow: none;
}

.page-about .about-cap__item h3 {
  margin: 0.6rem 0 0.35rem;
  font-size: 0.98rem;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-cap__item p {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--steel);
}

/* ---------- 团队 ---------- */
.page-about .about-team__layout {
  display: grid;
  gap: clamp(1.4rem, 3vw, 2.2rem);
  margin-top: clamp(1.4rem, 3vw, 2rem);
}

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

.page-about .about-team__tabs .tablist {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.page-about .about-team__tabs .tab {
  appearance: none;
  padding: 0.5rem 1.05rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: var(--ink-800);
  color: var(--steel);
  font-family: var(--font-sans);
  font-size: 0.88rem;
  line-height: 1.4;
  cursor: pointer;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-team__tabs .tab:hover {
  color: var(--paper);
  border-color: var(--line-cyan);
}

.page-about .about-team__tabs .tab[aria-selected="true"] {
  background: rgba(46, 242, 208, 0.13);
  border-color: var(--line-cyan);
  color: var(--paper);
  box-shadow: 0 6px 22px rgba(46, 242, 208, 0.16);
}

.page-about .about-team__tabs .tab-panel {
  display: block;
  margin-top: 1.2rem;
  padding: 1.2rem 1.15rem 1.3rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(15, 26, 46, 0.72);
}

.page-about .about-team__tabs .tab-panel[hidden] {
  display: none;
}

.page-about .tab-panel h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--paper);
}

.page-about .tab-panel > p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--steel);
}

.page-about .tab-panel ul {
  display: grid;
  gap: 0.5rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .tab-panel ul li {
  position: relative;
  padding-left: 1.15rem;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--steel);
}

.page-about .tab-panel ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
}

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

/* ---------- 合作生态 ---------- */
.page-about .about-head--split {
  min-width: 0;
}

.page-about .about-net {
  display: block;
  width: 100%;
  max-width: 220px;
  height: auto;
  margin: 1.2rem auto 0;
  transition: filter var(--dur) var(--ease);
}

.page-about .about-net:hover {
  filter: drop-shadow(0 0 14px rgba(46, 242, 208, 0.4));
}

.page-about .about-net__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1rem;
  margin-top: clamp(1.4rem, 3vw, 2rem);
}

.page-about .about-partner {
  position: relative;
  min-width: 0;
  padding: 1.25rem 1.2rem 1.35rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--about-panel);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-partner:hover,
.page-about .about-partner:focus-within {
  border-color: var(--line-cyan);
  box-shadow: 0 16px 36px rgba(46, 242, 208, 0.14);
  transform: translateY(-3px);
}

.page-about .about-partner__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.9rem;
  font-weight: 700;
  line-height: 1;
  color: var(--paper);
}

.page-about .about-partner__num span {
  margin-left: 0.15rem;
  font-size: 0.85rem;
  color: var(--orange);
}

.page-about .about-partner h3 {
  margin: 0.55rem 0 0.35rem;
  font-size: 1rem;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-partner p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.72;
  color: var(--steel);
}

/* ---------- 认证 ---------- */
.page-about .about-cert__panel {
  position: relative;
  padding: clamp(1.5rem, 4vw, 2.6rem);
  border: 1px solid rgba(245, 200, 107, 0.4);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 86% 12%, rgba(245, 200, 107, 0.18), transparent 56%),
    var(--about-panel);
  overflow: hidden;
}

.page-about .about-cert__panel .badge {
  transition: box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-cert__panel .badge:hover {
  box-shadow: 0 0 0 1px rgba(245, 200, 107, 0.6), 0 0 28px rgba(245, 200, 107, 0.45);
  transform: translateY(-2px);
}

.page-about .about-cert__panel .section-title {
  margin-top: 0.9rem;
}

.page-about .about-cert__text {
  max-width: 62ch;
  margin: 0.9rem 0 0;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--steel);
}

.page-about .about-cert__list {
  display: grid;
  gap: 0.65rem;
  margin: 1.3rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-cert__list li {
  position: relative;
  padding-left: 1.15rem;
  font-size: 0.94rem;
  line-height: 1.72;
  color: var(--paper);
}

.page-about .about-cert__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
}

/* ---------- 下一步 ---------- */
.page-about .about-next__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin-top: clamp(1.2rem, 3vw, 1.8rem);
}

.page-about .about-next__card {
  display: block;
  padding: 1.4rem 1.3rem 1.5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--about-panel);
  color: var(--paper);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-next__card:hover,
.page-about .about-next__card:focus-visible {
  border-color: var(--line-cyan);
  transform: translateY(-3px);
  box-shadow: 0 18px 38px rgba(7, 13, 24, 0.6);
}

.page-about .about-next__card h3 {
  margin: 0 0 0.45rem;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-next__card p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.72;
  color: var(--steel);
}

.page-about .about-next__card span {
  display: inline-block;
  margin-top: 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--cyan);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-console {
    grid-template-columns: 172px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-tl {
    grid-template-columns: 128px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-tl::before {
    top: 1.75rem;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    align-items: start;
  }

  .page-about .about-file:nth-child(2) {
    margin-left: 0.9rem;
  }

  .page-about .about-file:nth-child(3) {
    margin-left: 1.8rem;
  }

  .page-about .about-head--split {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 200px;
    align-items: center;
    gap: 1.6rem;
  }

  .page-about .about-net {
    margin-top: 0;
  }

  .page-about .about-team__layout {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: start;
  }

  .page-about .about-cap__item:nth-child(1) {
    grid-column: span 2;
  }

  .page-about .about-cap__item:nth-child(1) .about-cap__num {
    font-size: clamp(2.8rem, 5.6vw, 4.2rem);
  }
}

@media (min-width: 1120px) {
  .page-about .about-tl {
    grid-template-columns: 150px minmax(0, 1fr);
    padding-right: 1.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-file,
  .page-about .about-partner,
  .page-about .about-next__card,
  .page-about .about-years a,
  .page-about .about-net {
    transition: none;
  }
}