.page-about {
  --about-gap: 16px;
  --about-soft: rgba(19, 34, 74, .72);
  --about-glass: rgba(42, 63, 122, .38);
}

.page-about .crumb-sep {
  color: var(--mist);
  opacity: .6;
}

.page-about .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: 16px;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--mist);
}

.page-about .breadcrumb-link {
  color: var(--mist);
  text-decoration: none;
  transition: color var(--dur) ease;
}

.page-about .breadcrumb-link:hover,
.page-about .breadcrumb-link:focus-visible {
  color: var(--cyan);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  padding-block: 26px 30px;
}

.page-about .about-hero__main {
  padding-left: 2px;
}

.page-about .about-hero__title {
  margin: 14px 0 18px;
  font-size: clamp(34px, 9.2vw, 68px);
  font-weight: 900;
  font-style: italic;
  line-height: 1.02;
  letter-spacing: -.02em;
  transform: skewX(-6deg);
  transform-origin: left center;
  color: var(--white);
  padding-left: 4px;
}

.page-about .about-hero__lead {
  max-width: 56ch;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-about .about-hero__aside {
  position: relative;
  display: grid;
  gap: 14px;
  padding: 26px 20px 24px 52px;
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(37, 230, 208, .14), transparent 62%),
    linear-gradient(158deg, var(--about-glass), var(--ink-800) 72%);
}

.page-about .about-hero__annot {
  position: absolute;
  left: 16px;
  top: 26px;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--lava-soft);
}

.page-about .hero-stat {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.page-about .hero-stat:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .hero-stat__num {
  flex: 0 0 auto;
  min-width: 2.1em;
  font-size: clamp(32px, 8vw, 44px);
  font-weight: 700;
  line-height: 1;
  color: var(--lava);
}

.page-about .hero-stat__num--cyan {
  color: var(--cyan);
}

.page-about .hero-stat__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  padding-block: clamp(34px, 7vw, 62px);
}

.page-about .about-section__head {
  max-width: 62ch;
}

.page-about .about-h2 {
  margin: 12px 0 12px;
  font-size: clamp(24px, 5.4vw, 40px);
  font-weight: 900;
  font-style: italic;
  line-height: 1.16;
  letter-spacing: -.01em;
  transform: skewX(-6deg);
  transform-origin: left center;
  color: var(--white);
}

.page-about .about-sub {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-figure {
  margin: 26px 0 0;
  border-radius: var(--radius-l);
}

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

/* ---------- 时间线 ---------- */
.page-about .timeline {
  position: relative;
  margin: 30px 0 0;
  padding: 0 0 0 26px;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, rgba(37, 230, 208, .22) 55%, rgba(255, 106, 31, .3) 100%);
}

.page-about .tl-item {
  position: relative;
  padding: 16px 18px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--about-soft);
  transition: border-color var(--dur) ease, transform var(--dur) ease;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 24px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--lava);
  box-shadow: 0 0 0 4px rgba(255, 106, 31, .16);
}

.page-about .tl-item--now {
  border-color: var(--line-cyan);
  background:
    radial-gradient(130% 100% at 0% 0%, rgba(37, 230, 208, .16), transparent 58%),
    var(--about-soft);
}

.page-about .tl-item--now::before {
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(37, 230, 208, .18);
}

.page-about .tl-item:hover,
.page-about .tl-item:focus-within {
  border-color: var(--line-cyan);
  transform: translateX(4px);
}

.page-about .tl-year {
  display: inline-block;
  margin-bottom: 8px;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--lava-soft);
  background: rgba(255, 106, 31, .1);
}

.page-about .tl-item--now .tl-year {
  color: var(--cyan);
  background: rgba(37, 230, 208, .12);
}

.page-about .tl-title {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--white);
}

.page-about .tl-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 团队标签页 ---------- */
.page-about .about-team {
  margin-top: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  background: linear-gradient(165deg, var(--about-glass), var(--ink-900) 78%);
  overflow: hidden;
}

.page-about .about-team__tabs {
  display: flex;
  gap: 4px;
  padding: 12px 12px 0;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-team__tabs::-webkit-scrollbar {
  display: none;
}

.page-about .about-team__tab {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border: 0;
  border-radius: var(--radius-s);
  background: transparent;
  color: var(--mist);
  font-family: inherit;
  font-size: 14px;
  line-height: 1;
  cursor: pointer;
  position: relative;
  transition: color var(--dur) ease, background-color var(--dur) ease;
}

.page-about .about-team__tab::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 4px;
  height: 3px;
  border-radius: 3px;
  background: transparent;
  transition: background-color var(--dur) ease;
}

.page-about .about-team__tab:hover {
  color: var(--white);
  background: rgba(124, 140, 179, .12);
}

.page-about .about-team__tab[aria-selected="true"] {
  color: var(--white);
  background: rgba(255, 106, 31, .12);
}

.page-about .about-team__tab[aria-selected="true"]::after {
  background: var(--lava);
}

.page-about .about-team__idx {
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-about .about-team__tab[aria-selected="true"] .about-team__idx {
  color: var(--lava-soft);
}

.page-about .about-team__panes {
  padding: 20px 16px 24px;
}

.page-about .about-team__pane {
  animation: about-pane-in var(--dur) ease both;
}

.page-about .about-team__pane[hidden] {
  display: none;
}

@keyframes about-pane-in {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-about .about-team__lead {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--white);
}

.page-about .about-team__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .about-team__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
}

/* ---------- 校验流程 ---------- */
.page-about .about-check {
  display: grid;
  gap: 22px;
}

.page-about .about-check__figure {
  margin: 0;
  border-radius: var(--radius-l);
  border: 1px solid var(--line);
}

.page-about .check-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .check-step {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  border-radius: var(--radius-s);
  background: rgba(19, 34, 74, .5);
}

.page-about .check-step__num {
  display: block;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-about .check-step__title {
  margin: 6px 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
}

.page-about .check-step__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 内容准则（纸白分区） ---------- */
.page-about .about-rules {
  padding-block: clamp(34px, 7vw, 62px);
}

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

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

.page-about .about-rules .eyebrow {
  color: var(--cyan-deep);
}

.page-about .rules-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 24px;
}

.page-about .rule-card {
  position: relative;
  padding: 20px 18px;
  border: 1px solid var(--line-light);
  border-radius: var(--radius-m);
  background: #fff;
  transition: transform var(--dur) ease, border-color var(--dur) ease;
}

.page-about .rule-card:hover {
  transform: translateY(-3px);
  border-color: var(--cyan-deep);
}

.page-about .rule-card__idx {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  font-size: 13px;
  color: #fff;
  background: var(--ink-900);
}

.page-about .rule-card__title {
  margin: 12px 0 8px;
  font-size: 17px;
  font-weight: 700;
  font-style: italic;
  transform: skewX(-6deg);
  transform-origin: left center;
  color: var(--ink-900);
}

.page-about .rule-card__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-700);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partner__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-about .about-partner__figure {
  margin: 0;
  border-radius: var(--radius-l);
  border: 1px solid var(--line);
  order: -1;
}

.page-about .partner-list {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .partner-item {
  display: flex;
  gap: 14px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--about-soft);
}

.page-about .partner-item__num {
  flex: 0 0 auto;
  font-size: 28px;
  line-height: 1;
  font-weight: 700;
  color: var(--lava);
}

.page-about .partner-item__title {
  margin: 0 0 4px;
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
}

.page-about .partner-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-partner__note {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--white);
}

.page-about .about-partner__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
}

.page-about .about-partner__note a:hover {
  color: var(--lava-soft);
  border-bottom-color: var(--lava-soft);
}

/* ---------- 资质拼贴 ---------- */
.page-about .credit-bento {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 24px;
}

.page-about .credit {
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background:
    radial-gradient(120% 110% at 100% 0%, rgba(37, 230, 208, .1), transparent 60%),
    var(--about-soft);
  overflow: hidden;
  transition: border-color var(--dur) ease;
}

.page-about .credit[open] {
  border-color: var(--line-cyan);
}

.page-about .credit__head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

.page-about .credit__head::-webkit-details-marker {
  display: none;
}

.page-about .credit__idx {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--lava-soft);
}

.page-about .credit__name {
  flex: 1 1 auto;
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
}

.page-about .credit__hint {
  flex: 0 0 auto;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--mist);
}

.page-about .credit[open] .credit__hint {
  color: var(--cyan);
}

.page-about .credit__body {
  margin: 0;
  padding: 0 18px 20px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 下一步 ---------- */
.page-about .about-next__inner {
  padding: 26px 20px;
  border: 1px solid var(--line-cyan);
  border-radius: var(--radius-l);
  background:
    radial-gradient(120% 120% at 0% 0%, rgba(255, 106, 31, .14), transparent 58%),
    linear-gradient(150deg, var(--about-glass), var(--ink-900) 76%);
}

.page-about .next-list {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .next-item {
  display: grid;
  gap: 6px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.page-about .next-item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .next-item__key {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-about .next-item__val {
  font-size: 14px;
  line-height: 1.8;
  color: var(--white);
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: end;
    gap: 34px;
    padding-block: 34px 44px;
  }

  .page-about .about-hero__aside {
    padding: 28px 22px 26px 54px;
  }

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

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

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

  .page-about .about-team__tabs {
    padding: 16px 20px 0;
  }

  .page-about .about-team__panes {
    padding: 24px 22px 28px;
  }

  .page-about .about-check {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
    gap: 30px;
  }

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

@media (min-width: 1024px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.7fr) minmax(0, .95fr);
    gap: 56px;
    padding-block: 44px 60px;
  }

  .page-about .timeline {
    padding-left: 34px;
    gap: 16px;
  }

  .page-about .tl-item {
    padding: 18px 22px 20px;
  }

  .page-about .tl-item::before {
    left: -34px;
  }

  .page-about .rules-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-partner__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .95fr);
    align-items: center;
    gap: 40px;
  }

  .page-about .about-partner__figure {
    order: 0;
  }

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

  .page-about .credit--big {
    grid-column: span 2;
  }

  .page-about .check-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .about-next__inner {
    padding: 34px 32px;
  }

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

  .page-about .next-item {
    border-bottom: 0;
    border-left: 2px solid var(--line-cyan);
    padding: 0 0 0 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team__pane {
    animation: none;
  }

  .page-about .tl-item:hover,
  .page-about .tl-item:focus-within,
  .page-about .rule-card:hover {
    transform: none;
  }
}