/* ===== 品牌档案页 page-about ===== */
.page-about {
  --about-ink: #1C2237;
  --about-line: rgba(122, 90, 245, .22);
  --about-line-strong: rgba(122, 90, 245, .48);
  --about-warm: #F5F1E8;
  --about-warm-muted: #DFD7C0;
  position: relative;
  overflow: hidden;
  color: var(--c-text);
  background:
    radial-gradient(1100px 520px at 90% 0%, rgba(122, 90, 245, .16), transparent 62%),
    radial-gradient(800px 420px at 2% 55%, rgba(10, 212, 255, .06), transparent 55%),
    var(--c-bg);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about .container {
  width: min(100% - 2rem, var(--content-max));
  margin-inline: auto;
  padding-inline: 0;
}

.page-about section[id],
.page-about div[id] {
  scroll-margin-top: 6.5rem;
}

.about-section-head {
  max-width: 68rem;
  margin-bottom: 2rem;
}

.about-section-head__desc {
  max-width: 54rem;
  margin-top: .75rem;
  color: var(--c-muted);
  font-size: clamp(.98rem, .9rem + .25vw, 1.1rem);
  line-height: 1.75;
}

.page-about .eyebrow {
  display: flex;
  align-items: center;
  gap: .6rem;
  color: var(--c-green);
  letter-spacing: .1em;
}

.eyebrow__bar {
  display: inline-block;
  width: 1.4rem;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--c-green), rgba(83, 255, 160, .1));
  flex: none;
}

/* ---------- 品牌档案首屏 ---------- */
.about-hero {
  position: relative;
  padding: 1.5rem 0 2.5rem;
  border-bottom: 1px solid rgba(122, 90, 245, .16);
}

.about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(122, 90, 245, .055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(122, 90, 245, .055) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: linear-gradient(180deg, #000 10%, transparent 75%);
  mask-image: linear-gradient(180deg, #000 10%, transparent 75%);
  pointer-events: none;
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .5rem;
  margin-bottom: 1.4rem;
  font-size: .9rem;
}

.breadcrumb-sep {
  color: var(--c-muted);
  font-family: var(--font-data);
}

.breadcrumb-item {
  color: var(--c-muted);
}

.breadcrumb-item a {
  color: var(--c-muted);
  text-decoration: none;
  transition: color var(--transition);
}

.breadcrumb-item a:hover {
  color: var(--c-ice);
}

.breadcrumb-item[aria-current="page"] {
  color: var(--c-text);
  font-weight: 500;
}

.about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
  align-items: start;
  position: relative;
  z-index: 1;
}

.about-hero__title {
  margin: .6rem 0 1.1rem;
  font-family: var(--font-head);
  font-size: clamp(2.2rem, 1.7rem + 2.2vw, 3.9rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: .005em;
}

.about-hero__title-main {
  display: block;
}

.about-hero__title-sub {
  display: block;
  margin-top: .1em;
  font-size: .72em;
  font-weight: 700;
  color: var(--c-violet);
  letter-spacing: .02em;
}

.about-hero__lead {
  font-size: clamp(1.1rem, 1rem + .45vw, 1.5rem);
  line-height: 1.7;
  color: #D6DAF0;
  max-width: 52rem;
}

.about-hero__summary {
  margin-top: 1rem;
  color: var(--c-muted);
  line-height: 1.8;
  max-width: 52rem;
}

.about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.75rem;
}

.about-hero__media {
  position: relative;
  margin-top: .5rem;
}

.about-hero__img {
  width: 100%;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(122, 90, 245, .42);
  box-shadow: 0 18px 48px rgba(0, 0, 0, .35);
}

.about-hero__badge {
  position: absolute;
  display: flex;
  align-items: center;
  gap: .65rem;
  padding: .7rem .95rem;
  border-radius: var(--radius-md);
  background: rgba(7, 10, 22, .86);
  border: 1px solid rgba(122, 90, 245, .45);
  box-shadow: 0 10px 28px rgba(0, 0, 0, .32);
  backdrop-filter: blur(6px);
}

.about-hero__badge--primary {
  left: 1rem;
  bottom: 1rem;
}

.about-hero__badge--secondary {
  right: 1rem;
  top: 1rem;
}

.about-hero__badge-num {
  color: var(--c-green);
  font-size: 1.85rem;
  font-weight: 500;
  line-height: 1;
}

.about-hero__badge--secondary .about-hero__badge-num {
  color: var(--c-ice);
}

.about-hero__badge-text {
  font-size: .78rem;
  line-height: 1.4;
  color: var(--c-text);
}

/* ---------- 发展历程时间线 ---------- */
.about-timeline {
  padding: 3rem 0 2.5rem;
  border-bottom: 1px solid rgba(122, 90, 245, .14);
}

.about-timeline__track {
  position: relative;
  padding-left: 3.75rem;
}

.about-timeline__rail {
  position: absolute;
  left: 1.375rem;
  top: 1rem;
  bottom: 1rem;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, rgba(122, 90, 245, .12), var(--c-violet) 30%, rgba(10, 212, 255, .4) 70%, rgba(122, 90, 245, .12));
}

.about-timeline__item {
  position: relative;
  margin-bottom: 2.5rem;
}

.about-timeline__item:last-child {
  margin-bottom: 0;
}

.about-timeline__year {
  position: absolute;
  top: .65rem;
  left: 0;
  width: 2.75rem;
  height: 2.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--c-frame-2);
  border: 2px solid var(--c-violet);
  box-shadow: 0 0 0 4px rgba(122, 90, 245, .12), 0 0 18px rgba(122, 90, 245, .32);
  font-family: var(--font-data);
  font-size: .68rem;
  color: var(--c-green);
  letter-spacing: .04em;
  z-index: 2;
}

.about-timeline__card {
  position: relative;
  padding: 1.4rem 1.25rem 1.55rem;
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(17, 27, 68, .96), rgba(17, 27, 68, .84));
  border: 1px solid rgba(122, 90, 245, .28);
  box-shadow: 0 10px 30px rgba(0, 0, 0, .22);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.about-timeline__card::before {
  content: "";
  position: absolute;
  top: 1.1rem;
  right: 1.25rem;
  width: 3px;
  height: 1.9rem;
  border-radius: 3px;
  background: var(--c-ice);
}

.about-timeline__card--warm {
  background: var(--about-warm);
  border-color: transparent;
  color: var(--about-ink);
  box-shadow: 0 10px 30px rgba(0, 0, 0, .18);
}

.about-timeline__card--warm::before {
  background: var(--c-alert);
}

.about-timeline__card h3 {
  margin: 0 0 .55rem;
  font-family: var(--font-head);
  font-size: 1.32rem;
  line-height: 1.2;
  color: var(--c-text);
}

.about-timeline__card p {
  margin: 0;
  color: var(--c-muted);
  font-size: .96rem;
  line-height: 1.8;
}

.about-timeline__card--warm h3 {
  color: var(--about-ink);
}

.about-timeline__card--warm p {
  color: #3D4057;
}

.about-timeline__version {
  display: inline-flex;
  align-items: center;
  padding: .18em .7em;
  margin-bottom: .75rem;
  border-radius: 999px;
  background: rgba(122, 90, 245, .16);
  border: 1px solid rgba(122, 90, 245, .3);
  font-family: var(--font-data);
  font-size: .82rem;
  letter-spacing: .08em;
  color: var(--c-ice);
}

.about-timeline__card--warm .about-timeline__version {
  background: rgba(28, 34, 55, .08);
  border-color: rgba(28, 34, 55, .18);
  color: #3D4057;
}

.about-timeline__facts {
  list-style: none;
  display: grid;
  gap: .55rem;
  padding: 0;
  margin: 1.1rem 0 0;
}

.about-timeline__facts li {
  position: relative;
  padding-left: 1.35rem;
  font-size: .93rem;
  line-height: 1.6;
}

.about-timeline__facts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .56em;
  width: .45rem;
  height: .45rem;
  border-radius: 50%;
  background: var(--c-green);
  box-shadow: 0 0 10px rgba(83, 255, 160, .55);
}

.about-timeline__art {
  margin: 2.5rem auto 0;
  width: min(280px, 100%);
}

.about-timeline__art img {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(122, 90, 245, .3);
  box-shadow: 0 14px 36px rgba(0, 0, 0, .3);
}

/* ---------- 数据服务地图 ---------- */
.about-map {
  padding: 3rem 0;
  border-bottom: 1px solid rgba(122, 90, 245, .14);
}

.about-map__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.25rem;
}

.about-map__block {
  padding: 1.4rem 1.2rem;
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(17, 27, 68, .92), rgba(17, 27, 68, .76));
  border: 1px solid rgba(122, 90, 245, .24);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.about-map__block > h3,
.about-rhythm h3 {
  margin: 0 0 1rem;
  padding-bottom: .55rem;
  border-bottom: 1px solid rgba(122, 90, 245, .2);
  font-family: var(--font-head);
  font-size: 1.24rem;
  font-weight: 700;
  line-height: 1.2;
}

.about-map__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: .75rem;
}

.about-map__row {
  display: flex;
  align-items: center;
  gap: .85rem;
  padding: .8rem .75rem;
  border-radius: var(--radius-md);
  background: rgba(10, 212, 255, .04);
  border: 1px solid rgba(122, 90, 245, .2);
}

.about-map__code {
  min-width: 2em;
  color: var(--c-green);
  font-weight: 500;
  opacity: .92;
}

.about-map__name {
  flex: 1;
  font-family: var(--font-head);
  font-size: 1.14rem;
  font-weight: 600;
  letter-spacing: .02em;
}

.about-map__note {
  margin: 1.1rem 0 0;
  padding-left: .85rem;
  border-left: 3px solid rgba(10, 212, 255, .45);
  color: var(--c-muted);
  font-size: .92rem;
  line-height: 1.7;
}

.about-layers {
  display: grid;
  gap: .85rem;
  padding: 1.1rem;
  border-radius: var(--radius-lg);
  background: rgba(7, 10, 22, .38);
  border: 1px solid rgba(122, 90, 245, .22);
}

.about-layers__top,
.about-layers__sub {
  padding: 1rem 1.05rem;
  border-radius: var(--radius-md);
}

.about-layers__top {
  background: linear-gradient(150deg, rgba(122, 90, 245, .3), rgba(122, 90, 245, .08));
  border: 1px solid rgba(122, 90, 245, .5);
}

.about-layers__sub {
  background: rgba(10, 212, 255, .06);
  border: 1px dashed rgba(10, 212, 255, .4);
}

.about-layers__label {
  display: block;
  margin-bottom: .35rem;
  font-family: var(--font-data);
  font-size: .78rem;
  letter-spacing: .12em;
  color: var(--c-muted);
  text-transform: uppercase;
}

.about-layers__title {
  margin-bottom: .5rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.12rem;
  line-height: 1.35;
}

.about-layers__bridge {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-ice);
  font-size: 1.2rem;
}

.about-stats {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  padding: 0;
  margin: 0 0 1.5rem;
}

.about-stats__item {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .5rem .9rem;
  border-radius: 999px;
  background: rgba(122, 90, 245, .1);
  border: 1px solid rgba(122, 90, 245, .28);
  font-size: .92rem;
  line-height: 1.4;
}

.about-stats__dot {
  display: inline-block;
  width: .55rem;
  height: .55rem;
  border-radius: 50%;
  flex: none;
}

.about-stats__dot--green {
  background: var(--c-green);
  box-shadow: 0 0 8px rgba(83, 255, 160, .7);
}

.about-stats__dot--ice {
  background: var(--c-ice);
  box-shadow: 0 0 8px rgba(10, 212, 255, .7);
}

.about-stats__dot--violet {
  background: var(--c-violet);
  box-shadow: 0 0 8px rgba(122, 90, 245, .8);
}

.about-rhythm {
  border-top: 1px solid rgba(122, 90, 245, .2);
  padding-top: 1rem;
}

.about-rhythm__list {
  display: grid;
  gap: .55rem;
  margin: 0;
  padding: 0;
}

.about-rhythm__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: .5rem .25rem;
  border-bottom: 1px dashed rgba(122, 90, 245, .18);
}

.about-rhythm__row dt {
  color: var(--c-muted);
}

.about-rhythm__row dd {
  margin: 0;
  color: var(--c-green);
  font-weight: 500;
}

.about-map__visual {
  margin: 2rem 0 0;
}

.about-map__visual img {
  display: block;
  width: 100%;
  aspect-ratio: 5 / 3;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(122, 90, 245, .3);
  box-shadow: 0 14px 38px rgba(0, 0, 0, .28);
}

/* ---------- 内容整理体系 ---------- */
.about-system {
  padding: 3rem 0;
  border-bottom: 1px solid rgba(122, 90, 245, .14);
}

.about-system__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.25rem;
}

.about-system__card {
  position: relative;
  padding: 1.7rem 1.4rem 1.6rem;
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(17, 27, 68, .96), rgba(17, 27, 68, .8));
  border: 1px solid rgba(122, 90, 245, .3);
  overflow: hidden;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.about-system__card--warm {
  background: var(--about-warm);
  color: var(--about-ink);
}

.about-system__card h3 {
  position: relative;
  z-index: 1;
  margin: 0 0 .7rem;
  font-family: var(--font-head);
  font-size: 1.3rem;
  line-height: 1.25;
  color: var(--c-text);
}

.about-system__card p {
  position: relative;
  z-index: 1;
  margin: 0 0 1rem;
  color: var(--c-muted);
  font-size: .95rem;
  line-height: 1.75;
}

.about-system__card--warm h3 {
  color: var(--about-ink);
}

.about-system__card--warm p {
  color: #3D4057;
}

.about-system__index {
  position: absolute;
  right: 1rem;
  bottom: .2rem;
  font-family: var(--font-data);
  font-size: 4.2rem;
  font-weight: 500;
  line-height: 1;
  color: rgba(122, 90, 245, .13);
  pointer-events: none;
}

.about-system__card--warm .about-system__index {
  color: rgba(28, 34, 55, .12);
}

.about-system__meta {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  padding: .28em .7em;
  border-radius: 999px;
  background: rgba(10, 212, 255, .09);
  border: 1px solid rgba(10, 212, 255, .28);
  color: var(--c-ice);
  font-family: var(--font-data);
  font-size: .8rem;
  letter-spacing: .03em;
}

.about-system__card--warm .about-system__meta {
  background: rgba(28, 34, 55, .07);
  border-color: rgba(28, 34, 55, .16);
  color: #3D4057;
}

/* 华人杯赛目录树 */
.about-tree {
  margin-top: 2.5rem;
  padding: 1.5rem 1.25rem;
  border-radius: var(--radius-lg);
  background: rgba(7, 10, 22, .42);
  border: 1px solid rgba(122, 90, 245, .25);
}

.about-tree__intro h3 {
  margin: 0 0 .65rem;
  font-family: var(--font-head);
  font-size: 1.35rem;
  line-height: 1.25;
}

.about-tree__intro p {
  margin: 0;
  color: var(--c-muted);
  font-size: .95rem;
  line-height: 1.75;
}

.about-tree__diagram {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.25rem;
  margin-top: 1.4rem;
}

.about-tree__root {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1.2rem 1.4rem;
  background: linear-gradient(160deg, rgba(122, 90, 245, .34), rgba(122, 90, 245, .1));
  border: 1px solid rgba(122, 90, 245, .55);
  border-radius: var(--radius-lg);
}

.about-tree__root-name {
  font-family: var(--font-head);
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1.2;
}

.about-tree__branches {
  list-style: none;
  position: relative;
  display: grid;
  gap: .8rem;
  padding: 0;
  margin: 0;
}

.about-tree__branches::before {
  content: "";
  position: absolute;
  left: .75rem;
  top: .9rem;
  bottom: .9rem;
  width: 2px;
  background: linear-gradient(180deg, rgba(122, 90, 245, .5), rgba(122, 90, 245, .14));
}

.about-tree__branch {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: .85rem 1rem .85rem 2rem;
  background: rgba(17, 27, 68, .9);
  border: 1px solid rgba(10, 212, 255, .2);
  border-radius: var(--radius-md);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.about-tree__branch::before {
  content: "";
  position: absolute;
  left: .75rem;
  width: 1.2rem;
  height: 2px;
  background: rgba(122, 90, 245, .45);
}

.about-tree__branch-name {
  font-weight: 500;
  font-size: .96rem;
  color: var(--c-text);
}

/* ---------- 信任与合规 ---------- */
.about-trust {
  padding: 3rem 0 3.5rem;
}

.about-trust__panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.6rem;
  padding: 1.6rem 1.2rem;
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, rgba(17, 27, 68, .96), rgba(17, 27, 68, .82));
  border: 1px solid rgba(122, 90, 245, .3);
  box-shadow: 0 18px 48px rgba(0, 0, 0, .3);
}

.about-trust__lead {
  margin: .75rem 0 0;
  color: var(--c-muted);
  line-height: 1.75;
  font-size: .98rem;
}

.about-trust__statement {
  position: relative;
  margin: 0;
  padding: 1.05rem 1.1rem 1.05rem 1.35rem;
  border-radius: var(--radius-md);
  background: rgba(255, 92, 57, .08);
  border: 1px solid rgba(255, 92, 57, .28);
  color: #F0EAE6;
  font-size: .96rem;
  line-height: 1.75;
}

.about-trust__alert-bar {
  position: absolute;
  left: .55rem;
  top: 1.1rem;
  bottom: 1.1rem;
  width: 4px;
  border-radius: 3px;
  background: var(--c-alert);
}

.about-trust__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: .75rem;
  margin-top: 1.25rem;
}

.about-trust__item {
  padding: 1rem 1.05rem;
  border-radius: var(--radius-md);
  background: rgba(7, 10, 22, .44);
  border: 1px solid rgba(122, 90, 245, .25);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.about-trust__label {
  display: block;
  margin-bottom: .35rem;
  font-family: var(--font-data);
  font-size: .76rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.about-trust__value {
  display: block;
  font-family: var(--font-head);
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--c-text);
  word-break: break-word;
}

.about-trust__note {
  margin: 1.25rem 0 0;
  color: var(--c-muted);
  font-size: .92rem;
  line-height: 1.7;
}

.about-trust__links {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
  margin-top: 1.4rem;
}

/* ---------- 桌面提升 ---------- */
@media (min-width: 768px) {
  .page-about .container {
    width: min(100% - 3rem, var(--content-max));
  }

  .about-hero {
    padding: 2.25rem 0 3.5rem;
  }

  .about-hero__grid {
    grid-template-columns: minmax(0, 6.5fr) minmax(0, 5.5fr);
    gap: 3rem;
    align-items: center;
  }

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

  .about-hero__img {
    aspect-ratio: 8 / 5;
  }

  .about-hero__badge--primary {
    left: 1.1rem;
    bottom: 1.1rem;
  }

  .about-hero__badge--secondary {
    right: 1.1rem;
    top: 1.1rem;
  }

  .about-timeline,
  .about-map,
  .about-system,
  .about-trust {
    padding-top: 4rem;
  }

  .about-timeline {
    padding-bottom: 3rem;
  }

  .about-timeline__art {
    width: min(320px, 100%);
    margin-left: 4.5rem;
  }

  .about-map__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 5fr) minmax(0, 3fr);
    gap: 1.4rem;
  }

  .about-system__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.4rem;
  }

  .about-system__card {
    padding: 1.9rem 1.7rem 1.7rem;
  }

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

@media (min-width: 960px) {
  .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 3.6rem;
  }

  .about-timeline__track {
    padding-left: 4.5rem;
  }

  .about-timeline__rail {
    left: 1.375rem;
  }

  .about-timeline__item {
    margin-bottom: 3.2rem;
  }

  .about-timeline__item:nth-child(even) {
    margin-left: 2.5rem;
  }

  .about-timeline__card {
    padding: 1.7rem 1.6rem 1.8rem;
  }

  .about-timeline__art {
    margin-left: 4.5rem;
  }

  .about-tree {
    padding: 1.8rem 1.6rem;
  }

  .about-tree__diagram {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    gap: 1.6rem;
    margin-top: 1.6rem;
  }

  .about-trust__panel {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 3rem;
    padding: 2.4rem 2.2rem;
  }
}

@media (hover: hover) {
  .about-timeline__card:hover,
  .about-map__block:hover,
  .about-system__card:hover,
  .about-tree__branch:hover,
  .about-trust__item:hover {
    transform: translateY(-2px);
    border-color: rgba(10, 212, 255, .55);
    box-shadow: 0 0 0 1px rgba(10, 212, 255, .22), 0 14px 32px rgba(0, 0, 0, .28);
  }
}