.page-about {
  --about-gap: clamp(1rem, 2.6vw, 1.9rem);
  --about-pad: clamp(2.6rem, 7vw, 5rem);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(1.2rem, 4vw, 2.2rem);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(1.8rem, 5vw, 3rem);
  padding: clamp(1.4rem, 4vw, 2.4rem) 0 clamp(2.2rem, 6vw, 3.6rem);
}

.page-about .about-hero__title {
  margin: 0.7rem 0 0;
  max-width: 22ch;
  font-family: var(--sans);
  font-size: clamp(2rem, 6.8vw, 3.9rem);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: 0.005em;
  color: var(--cream);
}

.page-about .about-hero__lede {
  margin: 1.1rem 0 0;
  max-width: 56ch;
  color: var(--mist);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.5rem;
}

.page-about .about-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .about-stats__item {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1.05rem 1.15rem;
  background: linear-gradient(160deg, rgba(16, 42, 74, 0.94), rgba(11, 27, 51, 0.94));
}

.page-about .about-stats__num {
  font-family: var(--mono);
  font-size: 1.5rem;
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: var(--cyan);
}

.page-about .about-stats__num.num--gold {
  color: var(--gold);
}

.page-about .about-stats__label {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  color: var(--rock);
}

@media (min-width: 520px) {
  .page-about .about-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 920px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: end;
  }
}

/* ---------- 维护历程时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  margin-top: var(--about-pad);
  padding: clamp(2.4rem, 7vw, 4.4rem) 0;
  background: var(--ink-deep);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-timeline__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.16;
  filter: saturate(0.55) contrast(1.05);
  pointer-events: none;
}

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

.page-about .about-timeline__head .prose {
  margin-top: 0.7rem;
  max-width: 60ch;
  color: var(--mist);
}

.page-about .about-flow {
  list-style: none;
  margin: clamp(1.8rem, 4vw, 2.6rem) 0 0;
  padding: 0;
}

.page-about .about-flow__item {
  display: grid;
  grid-template-columns: 3rem 1.1rem minmax(0, 1fr);
  gap: 0.7rem;
  padding-bottom: var(--about-gap);
}

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

.page-about .about-flow__year {
  padding-top: 0.85rem;
  text-align: right;
  font-family: var(--mono);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--gold);
}

.page-about .about-flow__rail {
  position: relative;
  display: block;
}

.page-about .about-flow__rail::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 1.3rem;
  width: 0.6rem;
  height: 0.6rem;
  margin-left: -0.3rem;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(240, 178, 74, 0.14);
  transition: background 0.25s ease, box-shadow 0.25s ease;
}

.page-about .about-flow__rail::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 2.25rem;
  bottom: 0;
  width: 1px;
  margin-left: -0.5px;
  background: linear-gradient(180deg, rgba(79, 107, 85, 0.9), rgba(79, 107, 85, 0.04));
}

.page-about .about-flow__item:last-child .about-flow__rail::after {
  display: none;
}

.page-about .about-flow__card {
  padding: 1rem 1.1rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(155deg, rgba(18, 48, 79, 0.92), rgba(11, 27, 51, 0.84));
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.page-about .about-flow__card .card__head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.page-about .about-flow__card .card__title {
  margin: 0.55rem 0 0.45rem;
  font-family: var(--sans);
  font-size: 1.1rem;
  line-height: 1.35;
  color: var(--cream);
}

.page-about .about-flow__card .card__body {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.76;
  color: var(--mist);
}

.page-about .about-flow__item:hover .about-flow__card,
.page-about .about-flow__item:focus-within .about-flow__card {
  transform: translateY(-3px);
  border-color: rgba(53, 240, 208, 0.5);
}

.page-about .about-flow__item:hover .about-flow__rail::before,
.page-about .about-flow__item:focus-within .about-flow__rail::before {
  background: var(--cyan);
  box-shadow: 0 0 0 6px rgba(53, 240, 208, 0.16);
}

@media (min-width: 760px) {
  .page-about .about-flow__item {
    grid-template-columns: 4.6rem 1.4rem minmax(0, 1fr);
    gap: 1.1rem;
  }

  .page-about .about-flow__year {
    font-size: 1.28rem;
    padding-top: 0.9rem;
  }
}

@media (min-width: 1100px) {
  .page-about .about-flow__item:nth-child(even) .about-flow__card {
    margin-left: clamp(1rem, 6vw, 4rem);
  }
}

/* ---------- 团队分工 ---------- */
.page-about .about-team {
  padding: var(--about-pad) 0;
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(1.8rem, 4vw, 2.6rem);
}

.page-about .about-team__body .section-head .prose {
  margin-top: 0.7rem;
  max-width: 62ch;
  color: var(--mist);
}

.page-about .about-roles {
  list-style: none;
  margin: clamp(1.4rem, 3vw, 2rem) 0 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.page-about .about-roles__item {
  padding: 1.05rem 1.2rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: rgba(16, 42, 74, 0.55);
  transition: background 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}

.page-about .about-roles__item:hover,
.page-about .about-roles__item:focus-within {
  transform: translateY(-2px);
  background: rgba(18, 48, 79, 0.88);
  border-color: rgba(53, 240, 208, 0.42);
}

.page-about .about-roles__name {
  margin: 0.35rem 0 0.4rem;
  font-family: var(--sans);
  font-size: 1.02rem;
  letter-spacing: 0.01em;
  color: var(--cream);
}

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

.page-about .about-team__figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--ink-card);
  overflow: hidden;
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-about .about-team__cap {
  padding: 0.7rem 1rem;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--rock);
}

@media (min-width: 720px) {
  .page-about .about-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    align-items: start;
  }
}

/* ---------- 数据核验 ---------- */
.page-about .about-verify {
  padding: var(--about-pad) 0;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(16, 42, 74, 0.38), rgba(11, 27, 51, 0));
}

.page-about .about-verify__grid {
  display: grid;
  gap: clamp(1.8rem, 4vw, 2.6rem);
}

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

.page-about .about-verify__figure img {
  display: block;
  width: 100%;
  max-width: 26rem;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
}

.page-about .about-verify__body .section-head .prose {
  margin-top: 0.7rem;
  max-width: 60ch;
  color: var(--mist);
}

.page-about .about-steps {
  list-style: none;
  margin: clamp(1.4rem, 3vw, 2rem) 0 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.page-about .about-steps__item {
  display: grid;
  grid-template-columns: 2.6rem minmax(0, 1fr);
  grid-template-areas:
    "idx name"
    "idx text";
  column-gap: 1rem;
  padding: 1rem 1.1rem 1.05rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--moss);
  border-radius: var(--r-md);
  background: rgba(16, 42, 74, 0.5);
  transition: border-left-color 0.25s ease, background 0.25s ease;
}

.page-about .about-steps__item:hover,
.page-about .about-steps__item:focus-within {
  border-left-color: var(--cyan);
  background: rgba(18, 48, 79, 0.82);
}

.page-about .about-steps__idx {
  grid-area: idx;
  font-family: var(--mono);
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1.25;
  color: var(--gold);
}

.page-about .about-steps__name {
  grid-area: name;
  margin: 0 0 0.3rem;
  font-family: var(--sans);
  font-size: 1rem;
  color: var(--cream);
}

.page-about .about-steps__item p {
  grid-area: text;
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.74;
  color: var(--mist);
}

.page-about .about-verify__note {
  margin: clamp(1.2rem, 3vw, 1.8rem) 0 0;
  padding: 1rem 1.15rem;
  border: 1px dashed rgba(181, 113, 74, 0.45);
  border-radius: var(--r-md);
  font-size: 0.9rem;
  line-height: 1.76;
  color: var(--mist);
}

@media (min-width: 900px) {
  .page-about .about-verify__grid {
    grid-template-columns: minmax(0, 0.42fr) minmax(0, 0.58fr);
    align-items: start;
  }
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  padding: var(--about-pad) 0 0;
}

.page-about .about-partners .section-head .prose {
  margin-top: 0.7rem;
  max-width: 62ch;
  color: var(--mist);
}

.page-about .about-partners__list {
  list-style: none;
  margin: clamp(1.6rem, 3.5vw, 2.4rem) 0 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.page-about .about-partners__item {
  padding: 1.3rem 1.25rem 1.4rem;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, rgba(16, 42, 74, 0.92), rgba(11, 27, 51, 0.7));
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.page-about .about-partners__item:hover {
  transform: translateY(-3px);
  border-color: rgba(240, 178, 74, 0.42);
}

.page-about .about-partners__num {
  display: block;
  font-family: var(--mono);
  font-size: 2.2rem;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-partners__num.num--gold {
  color: var(--gold);
}

.page-about .about-partners__item h3 {
  margin: 0.75rem 0 0.4rem;
  font-family: var(--sans);
  font-size: 1.04rem;
  color: var(--cream);
}

.page-about .about-partners__item p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.74;
  color: var(--mist);
}

@media (min-width: 780px) {
  .page-about .about-partners__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 办公与沟通 ---------- */
.page-about .about-office {
  margin-top: var(--about-pad);
  padding: clamp(2.2rem, 6vw, 3.6rem) 0;
  border-top: 1px solid rgba(79, 107, 85, 0.6);
  border-bottom: 1px solid rgba(79, 107, 85, 0.38);
  background:
    radial-gradient(120% 100% at 10% 0%, rgba(79, 107, 85, 0.55), rgba(11, 27, 51, 0) 62%),
    linear-gradient(160deg, #21352a, #10241f 68%, #0b1b33);
}

.page-about .about-office__grid {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.4rem);
}

.page-about .about-office__intro h2 {
  margin: 0.6rem 0 0;
  font-family: var(--sans);
  font-size: clamp(1.5rem, 3.6vw, 2.05rem);
  line-height: 1.22;
  color: var(--cream);
}

.page-about .about-office__intro p {
  margin: 0.9rem 0 0;
  max-width: 52ch;
  line-height: 1.82;
  color: var(--mist);
}

.page-about .about-office__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.7rem;
  margin-top: 1.4rem;
}

.page-about .about-office__list {
  margin: 0;
  display: grid;
  gap: 1px;
  border: 1px solid rgba(242, 237, 227, 0.16);
  border-radius: var(--r-lg);
  background: rgba(242, 237, 227, 0.12);
  overflow: hidden;
}

.page-about .about-office__row {
  display: grid;
  gap: 0.25rem;
  padding: 0.95rem 1.1rem;
  background: rgba(8, 21, 40, 0.66);
}

.page-about .about-office__row dt {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  color: var(--rock);
}

.page-about .about-office__row dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.93rem;
  line-height: 1.6;
  color: var(--cream);
  word-break: break-word;
}

.page-about .about-office__row dd a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 240, 208, 0.35);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.page-about .about-office__row dd a:hover {
  color: var(--cream);
  border-bottom-color: var(--cyan);
}

@media (min-width: 560px) {
  .page-about .about-office__row {
    grid-template-columns: 8.5rem minmax(0, 1fr);
    align-items: baseline;
    gap: 1rem;
  }
}

@media (min-width: 900px) {
  .page-about .about-office__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }
}

/* ---------- 后续指引 ---------- */
.page-about .about-next {
  padding: clamp(2.2rem, 6vw, 3.4rem) 0 clamp(2rem, 6vw, 3.2rem);
}

.page-about .about-next__panel {
  padding: clamp(1.6rem, 4vw, 2.4rem);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-lg);
  background: linear-gradient(140deg, rgba(16, 42, 74, 0.9), rgba(11, 27, 51, 0.66));
}

.page-about .about-next__panel h2 {
  margin: 0;
  font-family: var(--sans);
  font-size: clamp(1.35rem, 3.2vw, 1.8rem);
  line-height: 1.3;
  color: var(--cream);
}

.page-about .about-next__panel p {
  margin: 0.8rem 0 0;
  max-width: 70ch;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.3rem;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-flow__card,
  .page-about .about-roles__item,
  .page-about .about-partners__item {
    transition: none;
  }

  .page-about .about-flow__item:hover .about-flow__card,
  .page-about .about-roles__item:hover,
  .page-about .about-partners__item:hover {
    transform: none;
  }
}