/* ================= 品牌自述 / page-about ================= */
.page-about {
  --about-hair: rgba(27, 58, 107, .55);
  --about-cyan-line: rgba(95, 224, 208, .28);
  display: block;
  padding-block-end: clamp(3rem, 7vw, 6rem);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding-block: clamp(1.25rem, 3vw, 2rem) clamp(2.25rem, 5vw, 3.75rem);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -25% -20% auto -15%;
  height: 70%;
  z-index: -1;
  background:
    radial-gradient(58% 68% at 18% 4%, rgba(95, 224, 208, .13), transparent 70%),
    radial-gradient(48% 60% at 82% 12%, rgba(242, 184, 91, .08), transparent 72%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
  margin-block-start: 1.25rem;
}

.page-about .about-hero h1 {
  margin: .7rem 0 1rem;
  font-size: clamp(1.8rem, 5vw, 3.1rem);
  line-height: 1.2;
  letter-spacing: .06em;
  font-weight: 700;
  color: var(--silver);
  text-wrap: balance;
}

.page-about .about-hero .lede {
  max-width: 36rem;
  margin: 0;
  color: var(--grey);
  font-size: clamp(1rem, 2.1vw, 1.06rem);
  line-height: 1.9;
}

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

.page-about .about-hero__media {
  margin: 0;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border: var(--hairline);
  border-radius: var(--radius-l);
  background: var(--hull);
  box-shadow: 0 1.75rem 4rem rgba(3, 7, 18, .62);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 首屏数据 ---------- */
.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem 1.5rem;
  margin: clamp(2rem, 5vw, 3.25rem) 0 0;
  padding-block-start: 1.5rem;
  border-block-start: var(--hairline);
}

.page-about .about-facts > div {
  min-width: 0;
}

.page-about .about-facts dt {
  font-family: var(--font-mono);
  font-size: clamp(1.15rem, 3vw, 1.45rem);
  letter-spacing: .04em;
  color: var(--cyan);
}

.page-about .about-facts dd {
  margin: .4rem 0 0;
  color: var(--grey);
  font-size: .85rem;
  line-height: 1.65;
}

/* ---------- 通用区块 ---------- */
.page-about .about-block {
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
}

.page-about .about-block + .about-block {
  border-block-start: 1px solid rgba(27, 58, 107, .45);
}

.page-about .about-block .section-head h2 {
  font-size: clamp(1.35rem, 3.4vw, 2rem);
  line-height: 1.35;
  letter-spacing: .05em;
  color: var(--silver);
  margin: .5rem 0 0;
  text-wrap: balance;
}

/* ---------- 01 品牌起点 ---------- */
.page-about .about-start__grid {
  display: grid;
  gap: 1.75rem;
  margin-block-start: 1.75rem;
}

.page-about .about-start__body p {
  max-width: 44rem;
  margin: 0 0 1rem;
  color: var(--grey);
  line-height: 1.9;
}

.page-about .about-steps {
  display: grid;
  gap: .85rem;
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-steps li {
  padding: 1rem 1.1rem;
  border: var(--hairline);
  border-radius: var(--radius-m);
  background: rgba(7, 18, 38, .72);
}

.page-about .about-steps .mono {
  display: block;
  font-size: .72rem;
  letter-spacing: .18em;
  color: var(--gold);
}

.page-about .about-steps strong {
  display: block;
  margin-block-start: .4rem;
  color: var(--silver);
  letter-spacing: .06em;
  font-size: 1rem;
}

.page-about .about-steps span:last-child {
  display: block;
  margin-block-start: .4rem;
  color: var(--grey);
  font-size: .86rem;
  line-height: 1.7;
}

.page-about .about-note {
  display: grid;
  gap: .9rem;
  padding: clamp(1.25rem, 3vw, 1.75rem);
  border-radius: var(--radius-l);
}

.page-about .about-note__list {
  display: grid;
  gap: .8rem;
  margin: 0;
}

.page-about .about-note__list > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-block-end: .7rem;
  border-block-end: 1px solid rgba(27, 58, 107, .5);
}

.page-about .about-note__list > div:last-child {
  padding-block-end: 0;
  border-block-end: 0;
}

.page-about .about-note__list dt {
  color: var(--grey);
  font-size: .85rem;
}

.page-about .about-note__list dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1rem;
  letter-spacing: .04em;
  color: var(--cyan);
  white-space: nowrap;
}

/* ---------- 02 时间线 ---------- */
.page-about .about-tl__jump {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: 1.5rem 0 2.25rem;
}

.page-about .about-tl__jump a {
  display: inline-block;
  padding: .4rem .9rem;
  border: 1px solid var(--about-cyan-line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .1em;
  color: var(--cyan);
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-tl__jump a:hover,
.page-about .about-tl__jump a:focus-visible {
  background: rgba(95, 224, 208, .13);
  border-color: rgba(95, 224, 208, .6);
  color: var(--silver);
}

.page-about .about-tl__list {
  position: relative;
  display: grid;
  gap: 1.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-tl__node {
  position: relative;
  padding: 1.75rem 0 0 1.6rem;
  border-inline-start: 1px solid var(--about-cyan-line);
}

.page-about .about-tl__node::before {
  content: "";
  position: absolute;
  inset-inline-start: -.34rem;
  top: 1.9rem;
  width: .62rem;
  height: .62rem;
  border-radius: 50%;
  background: var(--abyss);
  border: 1px solid var(--cyan);
  box-shadow: 0 0 0 .3rem rgba(95, 224, 208, .07);
}

.page-about .about-tl__year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 4vw, 1.7rem);
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-about .about-tl__title {
  margin: .55rem 0 .5rem;
  font-size: 1.02rem;
  letter-spacing: .06em;
  color: var(--silver);
}

.page-about .about-tl__text {
  margin: 0;
  color: var(--grey);
  font-size: .9rem;
  line-height: 1.82;
}

.page-about .about-tl__figure {
  margin: 2.5rem 0 0;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: var(--hairline);
  border-radius: var(--radius-l);
  background: var(--hull);
}

.page-about .about-tl__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-tl__figure figcaption {
  padding: .85rem 1.15rem;
  color: var(--grey);
  font-size: .82rem;
  line-height: 1.6;
  border-block-start: 1px solid rgba(27, 58, 107, .5);
  background: rgba(3, 7, 18, .6);
}

/* ---------- 03 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  margin-block-start: 1.75rem;
}

.page-about .about-team__lead .card__index {
  font-size: clamp(2rem, 7vw, 3rem);
  color: var(--cyan);
  letter-spacing: .04em;
  margin: 0 0 .35rem;
}

.page-about .about-team__cell .card__title {
  font-size: 1rem;
  letter-spacing: .05em;
}

.page-about .about-team__figure {
  margin: 0;
  min-height: 12rem;
  aspect-ratio: 10 / 7;
  overflow: hidden;
  border: var(--hairline);
  border-radius: var(--radius-l);
  background: var(--hull);
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 04 运营原则 ---------- */
.page-about .about-rules__list {
  display: grid;
  gap: 0;
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-rules__list li {
  display: grid;
  grid-template-columns: 2.6rem minmax(0, 1fr);
  gap: 1rem;
  padding-block: 1.35rem;
  border-block-start: 1px solid var(--about-hair);
}

.page-about .about-rules__list li:last-child {
  border-block-end: 1px solid var(--about-hair);
}

.page-about .about-rules__list .idx {
  padding-block-start: .25rem;
  font-size: .82rem;
  letter-spacing: .12em;
  color: var(--gold);
}

.page-about .about-rules__list h3 {
  margin: 0 0 .45rem;
  font-size: 1.05rem;
  letter-spacing: .06em;
  color: var(--silver);
}

.page-about .about-rules__list p {
  margin: 0;
  color: var(--grey);
  font-size: .9rem;
  line-height: 1.85;
  max-width: 40rem;
}

/* ---------- 05 备案与联系 ---------- */
.page-about .about-contact__panel {
  display: grid;
  gap: 1.75rem;
  margin-block-start: 1.75rem;
  padding: clamp(1.4rem, 4vw, 2.5rem);
  border: 1px solid rgba(242, 184, 91, .3);
  border-radius: var(--radius-l);
  background:
    linear-gradient(155deg, rgba(27, 58, 107, .38), rgba(7, 18, 38, .92) 58%),
    var(--hull);
}

.page-about .about-contact__intro p {
  margin: 0 0 1rem;
  color: var(--grey);
  line-height: 1.9;
  max-width: 38rem;
}

.page-about .about-contact__intro a {
  color: var(--cyan);
  text-decoration: none;
  border-block-end: 1px solid rgba(95, 224, 208, .4);
}

.page-about .about-contact__intro a:hover,
.page-about .about-contact__intro a:focus-visible {
  color: var(--gold-soft);
  border-block-end-color: rgba(255, 217, 138, .6);
}

.page-about .about-contact__note {
  font-size: .88rem;
  color: var(--grey);
}

.page-about .about-contact__intro .btn {
  margin-block-start: .5rem;
}

.page-about .about-contact__list {
  display: grid;
  gap: 0;
  margin: 0;
  align-content: start;
}

.page-about .about-contact__list > div {
  display: grid;
  gap: .3rem;
  padding-block: .85rem;
  border-block-start: 1px solid rgba(27, 58, 107, .55);
}

.page-about .about-contact__list > div:first-child {
  border-block-start: 0;
  padding-block-start: 0;
}

.page-about .about-contact__list dt {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .16em;
  color: var(--grey);
}

.page-about .about-contact__list dd {
  margin: 0;
  color: var(--silver);
  font-size: .95rem;
  line-height: 1.7;
  overflow-wrap: anywhere;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

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

  .page-about .about-rules__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 2.75rem;
  }

  .page-about .about-rules__list li:nth-child(3) {
    border-block-start: 1px solid var(--about-hair);
  }

  .page-about .about-rules__list li:last-child {
    border-block-end: 1px solid var(--about-hair);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  }

  .page-about .about-start__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: 2.75rem;
    align-items: start;
  }

  .page-about .about-tl__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.5rem;
  }

  .page-about .about-tl__list::before {
    content: "";
    position: absolute;
    inset-inline: 0;
    top: .35rem;
    height: 1px;
    background: linear-gradient(90deg, rgba(95, 224, 208, .48), rgba(95, 224, 208, .18) 50%, rgba(95, 224, 208, .48));
  }

  .page-about .about-tl__node {
    padding: 2.25rem 0 0;
    border-inline-start: 0;
  }

  .page-about .about-tl__node::before {
    inset-inline-start: 0;
    top: 0;
  }

  .page-about .about-tl__figure {
    aspect-ratio: 8 / 3;
  }

  .page-about .about-contact__panel {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 3.5rem;
    align-items: start;
  }
}

@media (min-width: 1080px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .about-team__figure {
    grid-column: 3;
    grid-row: span 3;
    aspect-ratio: auto;
    height: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl__jump a {
    transition: none;
  }
}