.page-about {
  background: var(--ink-900);
  color: var(--g300);
  overflow-x: clip;
}

/* ---------- 刊头 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(28px, 6vw, 62px) 0 clamp(38px, 7vw, 84px);
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(120% 82% at 16% 4%, rgba(0, 229, 255, 0.20), transparent 56%),
    radial-gradient(96% 74% at 92% 18%, rgba(255, 107, 26, 0.18), transparent 62%),
    linear-gradient(158deg, #07101f 0%, #0a1428 58%, #0d1a33 100%);
}

.page-about .about-hero__img {
  position: absolute;
  inset: 0;
  z-index: -1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.34;
  mix-blend-mode: screen;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image: repeating-linear-gradient(
    114deg,
    rgba(0, 229, 255, 0.07) 0 1px,
    transparent 1px 30px
  );
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(20px, 4vw, 34px);
}

.page-about .about-hero__eyebrow {
  color: var(--amber);
}

.page-about .about-hero__title {
  margin: 12px 0 20px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(48px, 15vw, 122px);
  line-height: 0.9;
  letter-spacing: -0.025em;
  color: var(--white);
  text-shadow: 0 0 70px rgba(0, 229, 255, 0.28);
}

.page-about .about-hero__lead {
  max-width: 62ch;
  font-size: clamp(16px, 2.1vw, 19px);
  line-height: 1.8;
  color: var(--g300);
}

.page-about .about-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 4vw, 36px);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(34px, 6vw, 58px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .about-hero__stats li {
  padding: clamp(16px, 3vw, 24px);
  background: rgba(10, 20, 40, 0.82);
  transition: background 0.28s ease;
}

.page-about .about-hero__stats li:hover {
  background: var(--ink-700);
}

.page-about .about-hero__stat-num {
  display: block;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(28px, 6vw, 44px);
  line-height: 1;
  color: var(--white);
  letter-spacing: -0.02em;
}

.page-about .about-hero__stat-num em {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 0.42em;
  color: var(--cyan);
  margin-left: 0.16em;
  letter-spacing: 0;
}

.page-about .about-hero__stat-label {
  display: block;
  margin-top: 9px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--g500);
}

/* ---------- 品牌起点 ---------- */
.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
}

.page-about .about-origin__body p {
  font-size: clamp(16px, 2vw, 17px);
  line-height: 1.9;
  color: var(--g300);
}

.page-about .about-origin__body p + p {
  margin-top: 14px;
}

.page-about .about-origin__head .t-h2 {
  margin-top: 12px;
}

/* ---------- 主场理念 ---------- */
.page-about .about-motto {
  position: relative;
  background:
    linear-gradient(148deg, rgba(142, 29, 60, 0.62) 0%, rgba(59, 42, 107, 0.42) 58%, rgba(10, 20, 40, 0.9) 100%),
    var(--ink-800);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.page-about .about-motto__title {
  margin: 12px 0 14px;
}

.page-about .about-motto__lead {
  max-width: 56ch;
  color: rgba(255, 255, 255, 0.86);
}

.page-about .about-motto__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: clamp(26px, 4vw, 44px);
}

.page-about .about-motto__card {
  position: relative;
  padding: clamp(20px, 3.2vw, 30px);
  background: rgba(10, 20, 40, 0.66);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--r-md);
  border-left: 3px solid var(--cyan);
  transition: transform 0.32s ease, border-color 0.32s ease, box-shadow 0.32s ease;
}

.page-about .about-motto__card:nth-child(2) {
  border-left-color: var(--amber);
}

.page-about .about-motto__card:nth-child(3) {
  border-left-color: var(--orange);
}

.page-about .about-motto__card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 229, 255, 0.5);
  box-shadow: 0 26px 54px -34px rgba(0, 229, 255, 0.85);
}

.page-about .about-motto__mark {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .about-motto__card:nth-child(2) .about-motto__mark {
  color: var(--amber);
}

.page-about .about-motto__card:nth-child(3) .about-motto__mark {
  color: var(--orange);
}

.page-about .about-motto__card .t-h3 {
  margin: 10px 0 10px;
}

.page-about .about-motto__card p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--g300);
}

/* ---------- 演进时间线 ---------- */
.page-about .about-timeline__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 5vw, 56px);
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .about-timeline__list {
  position: relative;
  margin: 0;
  padding: 4px 0 4px 34px;
  list-style: none;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, rgba(0, 229, 255, 0.28) 55%, rgba(0, 229, 255, 0.04) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: 24px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--line);
  cursor: default;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(0, 229, 255, 0.10);
  transition: background 0.28s ease, border-color 0.28s ease, box-shadow 0.28s ease;
}

.page-about .about-timeline__item:hover::before,
.page-about .about-timeline__item:focus-within::before,
.page-about .about-timeline__item:focus::before {
  background: var(--orange);
  border-color: var(--orange);
  box-shadow: 0 0 0 7px rgba(255, 107, 26, 0.18);
}

.page-about .about-timeline__item:focus {
  outline: none;
}

.page-about .about-timeline__item .t-h3 {
  margin: 0 0 8px;
}

.page-about .about-timeline__brief {
  font-size: 15px;
  line-height: 1.8;
  color: var(--g300);
}

.page-about .about-timeline__more {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  margin-top: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--g500);
  border-left: 2px solid rgba(0, 229, 255, 0.35);
  padding-left: 0;
  transition: max-height 0.36s ease, opacity 0.3s ease, margin-top 0.3s ease, padding-left 0.3s ease;
}

.page-about .about-timeline__item:hover .about-timeline__more,
.page-about .about-timeline__item:focus-within .about-timeline__more,
.page-about .about-timeline__item:focus .about-timeline__more {
  max-height: 220px;
  opacity: 1;
  margin-top: 10px;
  padding-left: 12px;
}

@media (hover: none) {
  .page-about .about-timeline__more {
    max-height: none;
    opacity: 1;
    margin-top: 10px;
    padding-left: 12px;
  }
}

.page-about .about-timeline__aside {
  display: grid;
  gap: 20px;
  align-content: start;
}

.page-about .about-timeline__figure {
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line);
}

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

.page-about .about-timeline__legend {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline__legend li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--g300);
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  transition: border-color 0.28s ease;
}

.page-about .about-timeline__legend li:hover {
  border-color: var(--line-strong);
}

/* ---------- 团队与协作 ---------- */
.page-about .about-team__lead {
  max-width: 58ch;
  margin-top: 14px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--g300);
}

.page-about .about-team__list {
  display: grid;
  gap: 14px;
  margin-top: clamp(24px, 4vw, 36px);
}

.page-about .about-team__item {
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.page-about .about-team__item:hover,
.page-about .about-team__item:focus-within {
  border-color: var(--line-strong);
  box-shadow: 0 22px 50px -38px rgba(0, 229, 255, 0.9);
}

.page-about .about-team__trigger {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
  padding: clamp(16px, 3vw, 24px);
  background: none;
  border: 0;
  color: var(--white);
  font-family: var(--font-head);
  font-size: clamp(18px, 3vw, 22px);
  letter-spacing: 0.02em;
  text-align: left;
  cursor: pointer;
}

.page-about .about-team__trigger:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -4px;
}

.page-about .about-team__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.page-about .about-team__chev {
  margin-left: auto;
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(45deg);
  transition: transform 0.3s ease;
}

.page-about .about-team__item[data-open] .about-team__chev {
  transform: rotate(225deg);
}

.page-about .about-team__body {
  padding: 0 clamp(16px, 3vw, 24px) clamp(18px, 3vw, 24px);
  font-size: 15px;
  line-height: 1.9;
  color: var(--g300);
}

.page-about .about-team__figure {
  margin: clamp(24px, 4vw, 38px) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 380px;
  object-fit: cover;
}

.page-about .about-rail {
  margin-top: clamp(22px, 3.5vw, 34px);
}

.page-about .about-rail > * {
  flex: 0 0 min(300px, 78vw);
  scroll-snap-align: start;
}

.page-about .about-rail__card {
  padding: 20px;
  background: linear-gradient(160deg, rgba(0, 229, 255, 0.09) 0%, rgba(0, 229, 255, 0) 72%), var(--ink-800);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.page-about .about-rail__card:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
}

.page-about .about-rail__card .t-h3 {
  margin: 12px 0 8px;
}

.page-about .about-rail__card p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--g500);
}

/* ---------- 规模与覆盖 ---------- */
.page-about .about-scale__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(26px, 4vw, 40px);
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .about-scale__cell {
  padding: clamp(18px, 3.4vw, 32px);
  background: var(--ink-900);
  transition: background 0.3s ease;
}

.page-about .about-scale__cell:hover {
  background: var(--ink-700);
}

.page-about .about-scale__num {
  display: block;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(32px, 7.4vw, 58px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-about .about-scale__num em {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 0.4em;
  margin-left: 0.14em;
  color: var(--cyan);
  letter-spacing: 0;
}

.page-about .about-scale__cell:nth-child(3) .about-scale__num em {
  color: var(--amber);
}

.page-about .about-scale__cell:nth-child(5) .about-scale__num em {
  color: var(--orange);
}

.page-about .about-scale__label {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--g500);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  background:
    linear-gradient(118deg, rgba(59, 42, 107, 0.5) 0%, rgba(10, 20, 40, 0.2) 60%),
    var(--ink-800);
  border-top: 1px solid var(--line);
}

.page-about .about-next__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 46px);
  align-items: center;
}

.page-about .about-next__text .t-h2 {
  margin: 12px 0 14px;
}

.page-about .about-next__text p {
  max-width: 52ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--g300);
}

.page-about .about-next__acts {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

/* ---------- 桌面增强 ---------- */
@media (min-width: 620px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-motto__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-scale__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
    gap: clamp(34px, 5vw, 80px);
    align-items: start;
  }

  .page-about .about-timeline__layout {
    grid-template-columns: minmax(0, 1.12fr) minmax(280px, 0.88fr);
    align-items: start;
  }

  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr);
    gap: clamp(34px, 5vw, 72px);
  }

  .page-about .about-rail > * {
    flex: 0 0 min(320px, 30vw);
  }
}

@media (min-width: 1160px) {
  .page-about .about-hero__lead {
    max-width: 68ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}