.page-about {
  --about-line: rgba(201, 210, 227, 0.2);
  --about-hair: rgba(201, 210, 227, 0.12);
  --about-ink-soft: #33416b;
  display: block;
}

/* ---------- 通用页头块 ---------- */
.page-about .about-head {
  max-width: 62ch;
  margin-bottom: clamp(28px, 4vw, 52px);
}
.page-about .about-head .qpc-title {
  margin: 8px 0 14px;
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  padding-block: clamp(18px, 3vw, 34px) clamp(36px, 5vw, 68px);
}
.page-about .about-frame {
  position: relative;
  margin-top: 22px;
  padding: clamp(24px, 4vw, 58px);
  border: 1px solid var(--about-line);
  border-radius: clamp(20px, 3vw, 32px);
  background:
    radial-gradient(110% 84% at 92% 2%, rgba(15, 163, 127, 0.18), transparent 60%),
    radial-gradient(92% 76% at 0% 100%, rgba(124, 92, 255, 0.16), transparent 62%),
    var(--qpc-surface-2);
  overflow: hidden;
}
.page-about .about-frame::before {
  content: "";
  position: absolute;
  top: 15px;
  left: 15px;
  right: 15px;
  height: 1px;
  background: repeating-linear-gradient(90deg, var(--about-line) 0 1px, transparent 1px 14px);
  pointer-events: none;
}
.page-about .about-frame .qpc-title--xl {
  margin: 12px 0 18px;
  max-width: 22ch;
  line-height: 1.14;
}
.page-about .about-frame .qpc-lead {
  max-width: 44ch;
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin: clamp(26px, 4vw, 46px) 0 0;
  padding-top: clamp(20px, 3vw, 32px);
  border-top: 1px solid var(--about-hair);
}
.page-about .about-facts__row dt {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--qpc-muted);
}
.page-about .about-facts__row dd {
  margin: 6px 0 0;
  font-size: 16px;
  color: var(--qpc-text);
}

/* ---------- 01 历程 ---------- */
.page-about .about-history__grid {
  align-items: start;
  gap: clamp(28px, 4vw, 56px);
}
.page-about .about-history__figure {
  margin: 0;
}
.page-about .about-history__figure .qpc-figure__frame {
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--about-hair);
  background: var(--qpc-surface-2);
}
.page-about .about-history__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  position: relative;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--qpc-jade), var(--qpc-gold) 68%, rgba(201, 210, 227, 0.12));
}
.page-about .about-timeline__item {
  position: relative;
  padding-bottom: clamp(24px, 3vw, 38px);
}
.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}
.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 5px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 1px solid var(--qpc-gold);
  background: var(--qpc-ink);
  box-shadow: 0 0 0 4px rgba(232, 180, 90, 0.1);
  transition: box-shadow 0.32s ease, border-color 0.32s ease;
}
.page-about .about-timeline__item.is-visible::before {
  box-shadow: 0 0 0 6px rgba(232, 180, 90, 0.18);
}
.page-about .about-timeline__item--now::before {
  border-color: var(--qpc-jade-hi);
  background: var(--qpc-jade);
  box-shadow: 0 0 0 6px rgba(52, 211, 166, 0.18);
}
.page-about .about-timeline__year {
  display: inline-block;
  font-family: var(--qpc-font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--qpc-gold);
  margin-bottom: 6px;
}
.page-about .about-timeline__item--now .about-timeline__year {
  color: var(--qpc-jade-hi);
}
.page-about .about-timeline__content h3 {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 700;
  color: var(--qpc-text);
  letter-spacing: -0.01em;
}
.page-about .about-timeline__content p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--qpc-muted);
  max-width: 44ch;
}

/* ---------- 02 团队 ---------- */
.page-about .about-team__grid {
  align-items: center;
  gap: clamp(30px, 5vw, 64px);
}

.page-about .about-ring {
  position: relative;
  width: min(320px, 86%);
  margin: 0 auto;
}
.page-about .about-ring__svg {
  display: block;
  width: 100%;
  height: auto;
  filter: drop-shadow(0 22px 46px rgba(0, 0, 0, 0.5));
}
.page-about .about-ring__seg {
  transition: stroke-width 0.3s ease, opacity 0.3s ease;
}
.page-about .about-ring__seg--content { stroke: var(--qpc-jade); }
.page-about .about-ring__seg--algo { stroke: var(--qpc-gold); }
.page-about .about-ring__seg--service { stroke: var(--qpc-violet); }
.page-about .about-ring__seg--tech { stroke: var(--qpc-jade-hi); }
.page-about .about-ring__seg:hover { stroke-width: 21; }

.page-about .about-ring__core {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
  pointer-events: none;
}
.page-about .about-ring__num {
  display: block;
  font-family: var(--qpc-font-mono);
  font-size: clamp(34px, 5vw, 46px);
  font-weight: 700;
  line-height: 1;
  color: var(--qpc-text);
}
.page-about .about-ring__core small {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--qpc-muted);
}

.page-about .about-teams {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.page-about .about-teams__item {
  position: relative;
  padding: 18px 20px 18px 24px;
  border-radius: 16px;
  background: var(--qpc-surface);
  border: 1px solid var(--about-hair);
  transition: transform 0.28s ease, border-color 0.28s ease;
}
.page-about .about-teams__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 3px;
  border-radius: 3px;
  background: var(--qpc-jade);
}
.page-about .about-teams__item--algo::before { background: var(--qpc-gold); }
.page-about .about-teams__item--service::before { background: var(--qpc-violet); }
.page-about .about-teams__item--tech::before { background: var(--qpc-jade-hi); }
.page-about .about-teams__item:hover {
  transform: translateY(-2px);
  border-color: var(--about-line);
}
.page-about .about-teams__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.page-about .about-teams__top h3 {
  margin: 0;
  font-size: 16.5px;
  font-weight: 700;
  color: var(--qpc-text);
}
.page-about .about-teams__count {
  font-family: var(--qpc-font-mono);
  font-size: 13px;
  color: var(--qpc-jade-hi);
  letter-spacing: 0.04em;
}
.page-about .about-teams__item p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--qpc-muted);
}

/* ---------- 03 段位（浅色阅读面） ---------- */
.page-about .about-ranks {
  background: var(--qpc-mist);
  color: var(--about-ink-soft);
}
.page-about .about-ranks .qpc-eyebrow { color: var(--qpc-ink-3); }
.page-about .about-ranks .qpc-title { color: var(--qpc-ink); }
.page-about .about-ranks .qpc-lead { color: var(--about-ink-soft); }

.page-about .about-ranks__body {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
}
.page-about .about-ranks__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.page-about .about-ranks__item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 11px 18px;
  border-radius: 999px;
  background: #ffffff;
  border: 1px solid rgba(31, 58, 138, 0.16);
  box-shadow: 0 10px 26px -22px rgba(11, 20, 54, 0.6);
}
.page-about .about-ranks__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--qpc-ink-2);
}
.page-about .about-ranks__star {
  font-family: var(--qpc-font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: #8b8fa6;
}
.page-about .about-ranks__item--crown {
  background: linear-gradient(135deg, rgba(232, 180, 90, 0.22), rgba(232, 180, 90, 0.06));
  border-color: rgba(232, 180, 90, 0.55);
}
.page-about .about-ranks__item--crown .about-ranks__name { color: #8a5d13; }
.page-about .about-ranks__item--crown .about-ranks__star { color: #a9761f; }

.page-about .about-ranks__notes {
  display: grid;
  gap: 16px;
}
.page-about .about-ranks__note {
  padding: 22px 24px;
  border-radius: 18px;
  background: #ffffff;
  border: 1px solid rgba(31, 58, 138, 0.1);
}
.page-about .about-ranks__note h3 {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 700;
  color: var(--qpc-ink);
}
.page-about .about-ranks__note p {
  margin: 0 0 10px;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--about-ink-soft);
}
.page-about .about-ranks__note p:last-child { margin-bottom: 0; }
.page-about .about-ranks__linkline {
  margin-top: 14px;
}
.page-about .about-ranks .qpc-btn--ghost {
  color: var(--qpc-ink-3);
  border-color: rgba(31, 58, 138, 0.34);
}
.page-about .about-ranks .qpc-btn--ghost:hover {
  border-color: var(--qpc-ink-3);
  background: rgba(31, 58, 138, 0.06);
}

/* ---------- 04 内容品类 ---------- */
.page-about .about-catalog__grid {
  align-items: start;
  gap: clamp(28px, 4vw, 54px);
}
.page-about .about-catalog__figure {
  margin: 0;
}
.page-about .about-catalog__figure .qpc-figure__frame {
  border-radius: 22px;
  overflow: hidden;
  border: 1px solid var(--about-hair);
  background: var(--qpc-surface-2);
}
.page-about .about-catalog__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}
.page-about .about-filter__btn {
  appearance: none;
  font: inherit;
  font-size: 14px;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--about-line);
  background: transparent;
  color: var(--qpc-muted);
  cursor: pointer;
  transition: color 0.24s ease, border-color 0.24s ease, background 0.24s ease;
}
.page-about .about-filter__btn:hover {
  color: var(--qpc-text);
  border-color: var(--qpc-jade);
}
.page-about .about-filter__btn.is-active {
  background: rgba(15, 163, 127, 0.18);
  border-color: var(--qpc-jade);
  color: var(--qpc-jade-hi);
}

.page-about .about-cloud {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.page-about .about-cloud__item {
  padding: 10px 16px;
  border-radius: 12px;
  font-size: 14.5px;
  color: var(--qpc-text);
  background: var(--qpc-surface);
  border: 1px solid var(--about-hair);
  transition: transform 0.24s ease, border-color 0.24s ease, background 0.24s ease;
}
.page-about .about-cloud__item:hover {
  transform: translateY(-2px);
  border-color: var(--qpc-violet);
  background: rgba(124, 92, 255, 0.14);
}
.page-about .about-cloud__item[hidden] {
  display: none;
}
.page-about .about-catalog__hint {
  margin: 18px 0 0;
}

.page-about .about-themes {
  display: grid;
  gap: 18px;
  margin-top: clamp(30px, 4vw, 52px);
  padding-top: clamp(24px, 3vw, 36px);
  border-top: 1px solid var(--about-hair);
}
.page-about .about-themes__item h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--qpc-gold);
  letter-spacing: -0.01em;
}
.page-about .about-themes__item p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--qpc-muted);
}

/* ---------- 05 伙伴与荣誉 ---------- */
.page-about .about-partners__grid {
  gap: 16px;
}
.page-about .about-partner {
  position: relative;
  padding: 26px 24px 24px;
  border-radius: 20px;
  background: linear-gradient(160deg, rgba(22, 37, 92, 0.72), rgba(11, 20, 54, 0.5));
  border: 1px solid var(--about-hair);
  transition: transform 0.28s ease, border-color 0.28s ease;
}
.page-about .about-partner:hover {
  transform: translateY(-3px);
  border-color: rgba(15, 163, 127, 0.5);
}
.page-about .about-partner__idx {
  display: inline-block;
  font-family: var(--qpc-font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--qpc-violet);
  margin-bottom: 14px;
}
.page-about .about-partner h3 {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 700;
  color: var(--qpc-text);
}
.page-about .about-partner p {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--qpc-muted);
}

.page-about .about-honor {
  align-items: center;
  gap: clamp(28px, 4vw, 54px);
  margin-top: clamp(34px, 5vw, 62px);
}
.page-about .about-honor__text .qpc-title {
  margin: 8px 0 14px;
  font-size: clamp(24px, 3vw, 32px);
}
.page-about .about-honor__text p {
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--qpc-muted);
  max-width: 44ch;
}
.page-about .about-honor__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}
.page-about .about-honor__figure {
  margin: 0;
}
.page-about .about-honor__figure .qpc-figure__frame {
  border-radius: 22px;
  overflow: hidden;
  border: 1px solid var(--about-hair);
  background: var(--qpc-surface-2);
}
.page-about .about-honor__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 06 生产流程 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  counter-reset: flow;
}
.page-about .about-flow__step {
  position: relative;
  padding-top: 22px;
  border-top: 1px solid var(--about-line);
}
.page-about .about-flow__step::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 46%;
  height: 2px;
  background: linear-gradient(90deg, var(--qpc-jade), var(--qpc-jade-hi));
}
.page-about .about-flow__time {
  display: inline-block;
  font-family: var(--qpc-font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--qpc-gold);
  margin-bottom: 10px;
}
.page-about .about-flow__step h3 {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 700;
  color: var(--qpc-text);
}
.page-about .about-flow__step p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.76;
  color: var(--qpc-muted);
  max-width: 34ch;
}
.page-about .about-flow__sense {
  font-size: 13.5px !important;
  color: var(--qpc-jade-hi) !important;
  letter-spacing: 0.02em;
  margin-bottom: 0 !important;
}
.page-about .about-process__foot {
  margin-top: clamp(26px, 3vw, 38px);
  padding-top: 18px;
  border-top: 1px solid var(--about-hair);
}

/* ---------- 收束 ---------- */
.page-about .about-next {
  padding-bottom: clamp(48px, 7vw, 88px);
}
.page-about .about-next__panel {
  display: grid;
  gap: 26px;
  padding: clamp(26px, 4vw, 52px);
  border-radius: clamp(20px, 3vw, 30px);
  border: 1px solid var(--about-line);
  background:
    radial-gradient(100% 120% at 100% 0%, rgba(15, 163, 127, 0.2), transparent 60%),
    radial-gradient(90% 100% at 0% 100%, rgba(124, 92, 255, 0.16), transparent 62%),
    var(--qpc-surface-2);
}
.page-about .about-next__panel .qpc-title {
  margin: 8px 0 14px;
  font-size: clamp(24px, 3.2vw, 34px);
}
.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-themes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
  }
  .page-about .about-ranks__notes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-ranks__note:first-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-about .about-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
  }
  .page-about .about-flow__step {
    padding: 24px 24px 0 0;
  }
  .page-about .about-flow__step::before {
    width: 100%;
  }
  .page-about .about-next__panel {
    grid-template-columns: 1.25fr 1fr;
    align-items: center;
  }
  .page-about .about-next__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1024px) {
  .page-about .about-ranks__body {
    grid-template-columns: 0.82fr 1.18fr;
    align-items: start;
    gap: 46px;
  }
  .page-about .about-ranks__list {
    flex-direction: column;
    align-items: stretch;
  }
  .page-about .about-ranks__item {
    justify-content: space-between;
    border-radius: 14px;
  }
  .page-about .about-ranks__notes {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-teams__item,
  .page-about .about-partner,
  .page-about .about-cloud__item,
  .page-about .about-ring__seg,
  .page-about .about-timeline__item::before {
    transition: none;
  }
  .page-about .about-teams__item:hover,
  .page-about .about-partner:hover,
  .page-about .about-cloud__item:hover {
    transform: none;
  }
}