.page-about {
  --about-axis-x: 9px;
  padding-bottom: 40px;
}

.page-about .section {
  padding: 76px 0;
}

@media (min-width: 900px) {
  .page-about .section {
    padding: 108px 0;
  }
}

/* ---------- 面包屑 ---------- */
.page-about .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding-top: 28px;
  font-size: var(--fs-6);
  letter-spacing: 0.02em;
  color: var(--fg-2);
}

.page-about .crumbs a.crumbs__item {
  color: var(--fg-2);
  text-decoration: none;
  transition: color 0.22s ease;
}

.page-about .crumbs a.crumbs__item:hover {
  color: var(--cyan);
}

.page-about .crumbs__item[aria-current="page"] {
  color: var(--fg);
}

.page-about .crumbs__item + .crumbs__item::before {
  content: "／";
  margin-right: 6px;
  color: var(--line);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 40px 0 0;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -34%;
  right: -22%;
  width: 92vw;
  height: 92vw;
  max-width: 880px;
  max-height: 880px;
  background:
    radial-gradient(circle at 50% 50%, rgba(122, 59, 255, 0.32), rgba(122, 59, 255, 0) 62%),
    radial-gradient(circle at 68% 68%, rgba(0, 229, 255, 0.16), rgba(0, 229, 255, 0) 58%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}

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

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 7vw, 56px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--fg);
  text-shadow:
    0 0 1px var(--violet),
    0 0 22px rgba(122, 59, 255, 0.45),
    0 0 44px rgba(0, 229, 255, 0.18);
}

.page-about .about-hero__lede {
  max-width: 48ch;
  margin-top: 20px;
  font-size: var(--fs-5);
  line-height: 1.78;
  color: var(--fg-2);
}

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

.page-about .about-hero__media .media-frame {
  border-radius: var(--r-lg);
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1fr) minmax(320px, 440px);
    gap: 64px;
    align-items: center;
  }

  .page-about .about-hero__media {
    margin-right: calc(-1 * var(--gutter));
  }
}

/* ---------- 三条准则展签 ---------- */
.page-about .about-creed {
  margin: 48px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

.page-about .about-creed__item {
  padding-left: 20px;
  border-left: 2px solid var(--line);
  transition: border-color 0.3s ease;
}

.page-about .about-creed__item:hover {
  border-left-color: var(--violet);
}

.page-about .about-creed dt {
  margin: 0;
}

.page-about .about-creed dd {
  margin: 10px 0 0;
}

.page-about .about-creed__title {
  position: relative;
  display: inline-block;
  padding-bottom: 4px;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: var(--fs-4);
  color: var(--fg);
}

.page-about .about-creed__title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--grad);
  transition: width 0.36s cubic-bezier(0.2, 0.7, 0.3, 1);
}

.page-about .about-creed__item:hover .about-creed__title::after,
.page-about .about-creed__item:focus-within .about-creed__title::after {
  width: 100%;
}

.page-about .about-creed__idx {
  margin-right: 10px;
  font-size: var(--fs-6);
  letter-spacing: 0.08em;
  color: var(--cyan);
  border-left: 1px solid var(--cyan);
  padding-left: 8px;
}

.page-about .about-creed__text {
  font-size: var(--fs-5);
  line-height: 1.78;
  color: var(--fg-2);
}

@media (min-width: 900px) {
  .page-about .about-creed {
    margin-top: 64px;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 34px;
  }
}

/* ---------- 分档分布 ---------- */
.page-about .about-bars {
  margin-top: 44px;
  display: grid;
  gap: 14px;
}

.page-about .about-bar {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr) 46px;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  border-radius: var(--r-pill);
  background: var(--ink-2);
  color: var(--fg);
  text-decoration: none;
  transition: background 0.25s ease, transform 0.25s ease;
}

.page-about .about-bar:hover {
  background: var(--ink-3);
  transform: translateX(2px);
}

.page-about .about-bar__name {
  font-size: var(--fs-5);
  color: var(--fg);
}

.page-about .about-bar__track {
  position: relative;
  display: block;
  height: 10px;
  border-radius: var(--r-pill);
  background: var(--ink);
  overflow: hidden;
}

.page-about .about-bar__fill {
  display: block;
  height: 100%;
  width: var(--w, 0%);
  border-radius: var(--r-pill);
}

.page-about .about-bar__fill--classic {
  background: linear-gradient(90deg, rgba(0, 229, 255, 0.35), var(--cyan));
}

.page-about .about-bar__fill--multi {
  background: linear-gradient(90deg, rgba(122, 59, 255, 0.35), var(--violet));
}

.page-about .about-bar__fill--jackpot {
  background: linear-gradient(90deg, rgba(255, 176, 32, 0.3), var(--gold));
}

.page-about .about-bar__fill--limit {
  background: var(--grad);
}

.page-about .about-bar__num {
  text-align: right;
  font-size: var(--fs-5);
  color: var(--cyan);
}

.page-about .about-note {
  max-width: 68ch;
  margin: 26px 0 0;
  font-size: var(--fs-6);
  line-height: 1.8;
  color: var(--fg-2);
}

/* ---------- 沿革时间轴 ---------- */
.page-about .about-history__grid {
  margin-top: 46px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 44px;
}

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

.page-about .about-axis::before {
  content: "";
  position: absolute;
  left: var(--about-axis-x);
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), rgba(0, 229, 255, 0.06));
}

.page-about .about-axis__node {
  position: relative;
  padding-bottom: 20px;
}

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

.page-about .about-axis__node::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 24px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px var(--ink), 0 0 14px rgba(255, 176, 32, 0.75);
}

.page-about .about-axis__card {
  border-radius: var(--r-md);
  background: transparent;
  transition: background 0.25s ease;
}

.page-about .about-axis__card[open] {
  background: var(--ink-2);
}

.page-about .about-axis__summary {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 16px 20px 16px 40px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-axis__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--fs-5);
  color: var(--cyan);
  transition: transform 0.25s ease;
}

.page-about .about-axis__card[open] .about-axis__summary::after {
  transform: rotate(45deg);
}

.page-about .about-axis__year {
  font-size: var(--fs-4);
  color: var(--cyan);
}

.page-about .about-axis__ver {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: var(--fs-4);
  color: var(--fg);
}

.page-about .about-axis__body {
  margin: 0;
  padding: 0 20px 18px 40px;
  font-size: var(--fs-5);
  line-height: 1.78;
  color: var(--fg-2);
}

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

.page-about .about-caption {
  max-width: 52ch;
  margin: 16px 0 0;
  font-size: var(--fs-6);
  line-height: 1.8;
  color: var(--fg-2);
}

@media (min-width: 1000px) {
  .page-about .about-history__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 72px;
    align-items: start;
  }

  .page-about .about-history__aside {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}

/* ---------- 团队分工 ---------- */
.page-about .about-team__grid {
  margin-top: 46px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 44px;
}

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

.page-about .about-role {
  position: relative;
  padding: 24px 0 24px 58px;
  border-top: 1px solid var(--line);
}

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

.page-about .about-role__idx {
  position: absolute;
  left: 0;
  top: 27px;
  padding-left: 8px;
  font-size: var(--fs-6);
  letter-spacing: 0.08em;
  color: var(--cyan);
  border-left: 1px solid var(--cyan);
}

.page-about .about-role__name {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: var(--fs-4);
  color: var(--fg);
}

.page-about .about-role__desc {
  max-width: 60ch;
  margin: 0;
  font-size: var(--fs-5);
  line-height: 1.78;
  color: var(--fg-2);
}

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

@media (min-width: 1000px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 0.98fr) minmax(0, 1.02fr);
    gap: 64px;
    align-items: start;
  }
}

/* ---------- 桌台编号 ---------- */
.page-about .about-ruler {
  margin: 44px 0 30px;
}

.page-about .about-ruler__scale {
  position: relative;
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding-top: 20px;
}

.page-about .about-ruler__scale::before {
  content: "";
  position: absolute;
  top: 9px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, rgba(0, 229, 255, 0.12), var(--cyan) 32%, rgba(122, 59, 255, 0.7));
}

.page-about .about-ruler__tick {
  position: relative;
  font-size: 12px;
  color: var(--fg-2);
  white-space: nowrap;
}

.page-about .about-ruler__tick::before {
  content: "";
  position: absolute;
  top: -15px;
  left: 0;
  width: 1px;
  height: 9px;
  background: var(--cyan);
  box-shadow: 0 0 8px rgba(0, 229, 255, 0.8);
}

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

.page-about .about-codes__item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 10px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
  font-size: var(--fs-5);
  line-height: 1.78;
  color: var(--fg-2);
}

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

.page-about .about-codes__key {
  flex: 0 0 84px;
  font-size: var(--fs-6);
  letter-spacing: 0.06em;
  color: var(--violet);
}

.page-about .about-codes__val {
  min-width: 0;
  max-width: 62ch;
}

.page-about .about-codes__item .mono {
  color: var(--cyan);
}

/* ---------- 接入环节 ---------- */
.page-about .about-steps {
  margin: 44px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-step {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 20px 22px;
  background: var(--ink-2);
}

.page-about .about-step__idx {
  font-size: var(--fs-6);
  color: var(--gold);
  letter-spacing: 0.06em;
}

.page-about .about-step__name {
  font-size: var(--fs-5);
  line-height: 1.6;
  color: var(--fg);
}

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

@media (min-width: 1080px) {
  .page-about .about-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 出口 ---------- */
.page-about .about-exit__inner {
  display: grid;
  gap: 18px;
  padding: 40px 26px;
  border-radius: var(--r-lg);
  background: var(--ink-2);
}

.page-about .about-exit__text {
  max-width: 62ch;
  margin: 0;
  font-size: var(--fs-5);
  line-height: 1.78;
  color: var(--fg-2);
}

.page-about .about-exit__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

@media (min-width: 900px) {
  .page-about .about-exit__inner {
    padding: 56px 48px;
  }
}
</main>

.page-about {
  --w: 1rem;
}