/* ===== 品牌历程 page-about ===== */

.page-about {
  --about-axis: 118px;
  --about-line: linear-gradient(180deg, var(--cyan), rgba(53, 230, 212, .16) 48%, var(--orange));
  --about-card: linear-gradient(152deg, rgba(15, 27, 46, .96), rgba(7, 13, 24, .72));
  position: relative;
}

.page-about .yx-breadcrumb {
  padding-top: clamp(16px, 3vw, 30px);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding-block: clamp(20px, 3.6vw, 44px) clamp(34px, 5.4vw, 70px);
  background-image:
    radial-gradient(58% 52% at 6% 10%, rgba(53, 230, 212, .10), transparent 62%),
    radial-gradient(50% 46% at 96% 86%, rgba(255, 107, 44, .09), transparent 64%);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(22px, 4vw, 46px);
  align-items: center;
}

.page-about .about-hero__media {
  position: relative;
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(30, 53, 80, .95);
  background: var(--ink-2);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.72) contrast(1.06) brightness(.94);
}

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

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-size: clamp(1.85rem, 5.2vw, 3rem);
  line-height: 1.16;
  letter-spacing: .03em;
  color: var(--warm);
}

.page-about .about-hero__lead {
  margin-top: clamp(14px, 2.4vw, 22px);
  max-width: 56ch;
  color: rgba(242, 237, 227, .78);
  line-height: 1.85;
}

.page-about .about-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(16px, 3.4vw, 36px);
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: clamp(16px, 2.4vw, 22px) 0 0;
  list-style: none;
  border-top: 1px solid rgba(30, 53, 80, .95);
}

.page-about .about-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 86px;
}

.page-about .about-hero__num {
  font-size: clamp(1.35rem, 2.6vw, 1.75rem);
  line-height: 1;
  color: var(--cyan);
  letter-spacing: .05em;
  text-shadow: 0 0 18px rgba(53, 230, 212, .35);
}

.page-about .about-hero__stats li > span:last-child {
  font-size: .78rem;
  letter-spacing: .04em;
  color: var(--mist);
}

/* ---------- 时间轴区 ---------- */

.page-about .about-track {
  padding-top: clamp(28px, 4.4vw, 56px);
}

.page-about .about-track__head {
  max-width: 62ch;
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-about .about-track__head h2 {
  margin: 12px 0 0;
  font-size: clamp(1.4rem, 3.6vw, 2.1rem);
  line-height: 1.26;
  color: var(--warm);
}

.page-about .about-track__head .yx-lead {
  margin-top: 14px;
  color: rgba(242, 237, 227, .72);
  line-height: 1.8;
}

.page-about .about-track__filter {
  flex-wrap: wrap;
  margin-bottom: clamp(22px, 3.4vw, 36px);
}


.page-about .about-track__list {
  position: relative;
  display: grid;
  gap: clamp(20px, 3.2vw, 34px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-track__list::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: var(--about-line);
}

.page-about .about-node {
  position: relative;
  display: grid;
  gap: 10px;
  padding-left: 34px;
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(53, 230, 212, .10);
  animation: about-pulse 3.6s var(--ease) infinite;
}

.page-about .about-node:nth-child(2)::before { animation-delay: .6s; }
.page-about .about-node:nth-child(3)::before { animation-delay: 1.2s; }
.page-about .about-node:nth-child(4)::before { animation-delay: 1.8s; }
.page-about .about-node:nth-child(5)::before { animation-delay: 2.4s; }

@keyframes about-pulse {
  0%, 100% { box-shadow: 0 0 0 4px rgba(53, 230, 212, .10); }
  50%      { box-shadow: 0 0 0 10px rgba(53, 230, 212, .02); }
}

.page-about .about-node__meta {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .about-node__no {
  font-size: 1.02rem;
  color: var(--cyan);
  letter-spacing: .08em;
}

.page-about .about-node__stage {
  font-size: .76rem;
  letter-spacing: .14em;
  color: var(--mist);
}

.page-about .about-node__body {
  min-width: 0;
  padding: clamp(16px, 2.6vw, 26px);
  border-radius: var(--radius-md);
  border: 1px solid rgba(30, 53, 80, .9);
  border-top-right-radius: var(--radius-sm);
  background: var(--about-card);
  transition: border-color .42s var(--ease), transform .42s var(--ease), box-shadow .42s var(--ease);
}

.page-about .about-node:hover .about-node__body,
.page-about .about-node:focus-within .about-node__body {
  border-color: rgba(53, 230, 212, .42);
  box-shadow: 0 20px 46px -30px rgba(53, 230, 212, .5);
  transform: translateY(-3px);
}

.page-about .about-node__title {
  margin: 0 0 12px;
  font-family: var(--font-title);
  font-size: clamp(1.06rem, 2.3vw, 1.3rem);
  font-weight: 600;
  letter-spacing: .05em;
  line-height: 1.4;
  color: var(--warm);
}

.page-about .about-node__text {
  margin: 0;
  line-height: 1.85;
  color: rgba(242, 237, 227, .84);
}

.page-about .about-key {
  font-family: var(--font-mono);
  font-size: .94em;
  color: var(--cyan);
  letter-spacing: .02em;
}

.page-about .about-node__more {
  margin: 14px 0 0;
  padding-left: 14px;
  border-left: 2px solid rgba(53, 230, 212, .45);
  font-size: .88rem;
  line-height: 1.8;
  color: rgba(147, 164, 186, .96);
  transition: border-color .4s var(--ease), color .4s var(--ease);
}

.page-about .about-node:hover .about-node__more,
.page-about .about-node:focus-within .about-node__more {
  border-color: var(--orange);
  color: rgba(242, 237, 227, .82);
}

.page-about .about-node__media {
  margin: 16px 0 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(30, 53, 80, .9);
  background: var(--ink-2);
}

.page-about .about-node__media--wide { max-width: 560px; }
.page-about .about-node__media--tall { max-width: 340px; }

.page-about .about-node__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(.7) contrast(1.05) brightness(.95);
}

.page-about .yx-filter__empty {
  margin-top: 18px;
  font-size: .88rem;
  color: var(--mist);
}

/* ---------- 尾部行动区 ---------- */

.page-about .about-next {
  padding-bottom: clamp(42px, 6vw, 78px);
}

.page-about .about-next__panel {
  display: grid;
  gap: clamp(20px, 3.4vw, 40px);
  padding: clamp(22px, 4vw, 44px);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(30, 53, 80, .92);
  background:
    radial-gradient(78% 120% at 100% 0%, rgba(255, 107, 44, .15), transparent 62%),
    linear-gradient(160deg, var(--ink-2), rgba(7, 13, 24, .92));
  position: relative;
  overflow: hidden;
}

.page-about .about-next__panel::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, var(--cyan), var(--orange));
  opacity: .8;
}

.page-about .about-next__copy h2 {
  margin: 12px 0 0;
  font-size: clamp(1.34rem, 3.2vw, 1.95rem);
  line-height: 1.26;
  color: var(--warm);
}

.page-about .about-next__copy .yx-lead {
  margin-top: 14px;
  max-width: 52ch;
  color: rgba(242, 237, 227, .76);
  line-height: 1.8;
}

.page-about .about-next__links {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
  align-content: start;
}

.page-about .about-next__links .btn {
  width: 100%;
  justify-content: center;
  text-align: center;
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-about .about-node__media--tall { max-width: 300px; }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 1fr);
    gap: clamp(30px, 4vw, 52px);
  }

  .page-about .about-hero__media {
    transform: rotate(-1.1deg);
  }

  .page-about .about-track__list::before {
    left: var(--about-axis);
  }

  .page-about .about-node {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: clamp(28px, 4.2vw, 54px);
    padding-left: 0;
    align-items: start;
  }

  .page-about .about-node::before {
    left: var(--about-axis);
    top: 18px;
    transform: translateX(-50%);
  }

  .page-about .about-node__meta {
    flex-direction: column;
    align-items: flex-end;
    text-align: right;
    gap: 8px;
    padding-top: 16px;
  }

  .page-about .about-node__stage {
    writing-mode: vertical-rl;
    letter-spacing: .18em;
  }

  .page-about .about-next__panel {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: center;
  }
}

@media (min-width: 1180px) {
  .page-about .about-node__body {
    padding-right: clamp(26px, 4vw, 46px);
  }

  .page-about .about-node__media--wide { max-width: 620px; }
  .page-about .about-node__media--tall { max-width: 340px; }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-node::before { animation: none; }
  .page-about .about-node__body,
  .page-about .about-node__more { transition: none; }
  .page-about .about-hero__media { transform: none; }
}