/* ===== 品牌档案 · 页面专属样式（作用域 .page-about） ===== */

.page-about {
  --about-card: rgba(17, 26, 51, .88);
  --about-hair: rgba(185, 167, 255, .16);
  --about-glow: rgba(124, 77, 255, .32);
  display: block;
}

.page-about section[id] {
  scroll-margin-top: calc(var(--bar-h) + 20px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(26px, 6vw, 52px);
  padding-bottom: clamp(38px, 8vw, 88px);
}

.page-about .about-hero__glow {
  position: absolute;
  inset: -28% -14% auto -14%;
  height: 80%;
  pointer-events: none;
  background:
    radial-gradient(58% 60% at 22% 34%, var(--about-glow), transparent 70%),
    radial-gradient(42% 52% at 78% 20%, rgba(0, 229, 255, .2), transparent 72%),
    radial-gradient(34% 40% at 58% 86%, rgba(255, 61, 218, .16), transparent 76%);
}

.page-about .about-hero__eyebrow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin: clamp(18px, 4vw, 28px) 0 0;
}

.page-about .about-hero__eyebrow-text {
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--haze);
}

.page-about .about-hero__title {
  position: relative;
  margin: .38em 0 .5em;
  max-width: 22ch;
  font-family: var(--font-serif);
  font-size: clamp(29px, 7vw, 60px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: .005em;
  color: var(--paper);
  text-shadow: 0 0 34px var(--about-glow);
}

.page-about .about-hero__lead {
  position: relative;
  margin: 0;
  max-width: 60ch;
  color: var(--haze);
  font-size: clamp(15px, 3.8vw, 17.5px);
  line-height: 1.9;
}

.page-about .about-hero__stats {
  list-style: none;
  margin: clamp(26px, 6vw, 46px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-hero__stat {
  padding: 16px 18px 18px;
  background: linear-gradient(180deg, rgba(17, 26, 51, .94), rgba(12, 20, 40, .94));
}

.page-about .about-hero__stat-num {
  display: block;
  font-size: clamp(20px, 5vw, 26px);
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--gold);
}

.page-about .about-hero__stat-label {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--haze);
}

.page-about .about-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: clamp(22px, 5vw, 34px);
}

.page-about .about-toc__link {
  display: inline-block;
  padding: 7px 13px;
  font-size: 12.5px;
  color: var(--paper);
  text-decoration: none;
  border: 1px solid var(--about-hair);
  border-radius: 999px;
  background: rgba(7, 11, 24, .6);
  transition: border-color .25s var(--ease), color .25s var(--ease), transform .25s var(--ease);
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  transform: translateY(-2px);
}

/* ---------- 章节节奏 ---------- */
.page-about .about-block {
  padding-block: clamp(52px, 9vw, 104px);
}

.page-about .about-block--nodes {
  background: linear-gradient(180deg, rgba(17, 26, 51, 0) 0%, rgba(17, 26, 51, .55) 28%, rgba(17, 26, 51, 0) 100%);
}

/* ---------- 01 起步与积累 ---------- */
.page-about .about-history {
  display: grid;
  gap: clamp(26px, 6vw, 48px);
  margin-top: clamp(26px, 6vw, 46px);
}

.page-about .about-history__media {
  margin: 0;
  border: 1px solid var(--about-hair);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel-deep);
  box-shadow: 0 20px 52px rgba(5, 7, 15, .58);
}

.page-about .about-history__media .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 4px 0 0 24px;
  border-left: 1px solid var(--about-hair);
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: clamp(22px, 5vw, 34px);
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -29px;
  top: .5em;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(0, 229, 255, .14), 0 0 18px rgba(0, 229, 255, .5);
}

.page-about .about-timeline__mark {
  display: inline-block;
  margin: 0 0 10px;
  padding: 3px 8px;
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--gold);
  background: rgba(255, 200, 87, .08);
  border: 1px solid rgba(255, 200, 87, .3);
  border-radius: 4px;
}

.page-about .about-timeline__title {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-size: clamp(18px, 4.4vw, 22px);
  line-height: 1.35;
  color: var(--paper);
}

.page-about .about-timeline__text {
  margin: 0;
  max-width: 46ch;
  color: var(--haze);
  font-size: 14.5px;
  line-height: 1.85;
}

/* ---------- 02 三地配合 ---------- */
.page-about .about-nodes {
  display: grid;
  gap: clamp(16px, 4vw, 24px);
  margin-top: clamp(24px, 6vw, 46px);
}

.page-about .about-node {
  position: relative;
  padding: clamp(22px, 5vw, 30px);
  border: 1px solid var(--about-hair);
  border-left: 2px solid var(--violet);
  border-radius: var(--radius);
  background: linear-gradient(155deg, var(--about-card), rgba(12, 20, 40, .82));
  box-shadow: 0 16px 40px rgba(5, 7, 15, .5);
  transition: transform .3s var(--ease), border-left-color .3s var(--ease);
}

.page-about .about-node:hover,
.page-about .about-node:focus-within {
  transform: translateY(-4px);
  border-left-color: var(--cyan);
}

.page-about .about-node__city {
  position: absolute;
  top: 12px;
  right: 18px;
  margin: 0;
  font-size: 30px;
  font-weight: 700;
  letter-spacing: .08em;
  color: rgba(185, 167, 255, .22);
}

.page-about .about-node__name {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: clamp(17px, 4.2vw, 20px);
  color: var(--paper);
}

.page-about .about-node__text {
  margin: 0 0 16px;
  color: var(--haze);
  font-size: 14.5px;
  line-height: 1.85;
}

.page-about .about-node__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  list-style: none;
  margin: 0;
  padding: 0;
  padding-top: 14px;
  border-top: 1px dashed var(--about-hair);
}

.page-about .about-node__facts li {
  font-size: 12.5px;
  letter-spacing: .03em;
  color: var(--haze);
}

.page-about .about-node__facts .mono {
  margin-right: 3px;
  font-size: 14px;
  color: var(--gold);
}

.page-about .about-nodes__note {
  margin: clamp(24px, 5vw, 36px) 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--cyan);
  max-width: 66ch;
  color: var(--haze);
  font-size: 14px;
  line-height: 1.9;
}

.page-about .about-nodes__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, .4);
}

.page-about .about-nodes__note a:hover,
.page-about .about-nodes__note a:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 03 技术伙伴 ---------- */
.page-about .about-eco {
  display: grid;
  gap: clamp(24px, 5vw, 40px);
  margin-top: clamp(24px, 6vw, 46px);
}

.page-about .about-eco__media {
  margin: 0;
  border: 1px solid var(--about-hair);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--void-deep);
}

.page-about .about-eco__media .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-eco__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-eco__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px 18px;
  border: 1px solid var(--about-hair);
  border-radius: 14px;
  background: rgba(7, 11, 24, .58);
  transition: border-color .28s var(--ease), box-shadow .28s var(--ease);
}

.page-about .about-eco__item:hover {
  border-color: rgba(0, 229, 255, .45);
  box-shadow: 0 12px 32px rgba(0, 229, 255, .12);
}

.page-about .about-eco__key {
  font-size: 22px;
  font-weight: 700;
  line-height: 1.15;
  color: var(--cyan);
  text-shadow: 0 0 18px rgba(0, 229, 255, .38);
}

.page-about .about-eco__item h3 {
  margin: 0 0 6px;
  font-family: var(--font-sans);
  font-size: 15.5px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .about-eco__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--haze);
}

.page-about .about-eco__note {
  margin: 18px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--magenta);
  font-size: 13px;
  line-height: 1.85;
  color: var(--haze);
}

/* ---------- 04 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: clamp(18px, 4vw, 26px);
  margin-top: clamp(24px, 6vw, 46px);
}

.page-about .about-team__card {
  padding: clamp(20px, 5vw, 30px);
  border: 1px solid var(--about-hair);
  border-radius: var(--radius);
  background: linear-gradient(160deg, var(--about-card), rgba(12, 20, 40, .82));
}

.page-about .about-team__figure {
  margin: 0 0 4px;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-about .about-team__num {
  font-size: clamp(30px, 8vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-team__unit {
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--haze);
}

.page-about .about-team__name {
  margin: 12px 0 8px;
  font-family: var(--font-serif);
  font-size: 18px;
  color: var(--paper);
}

.page-about .about-team__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--haze);
}

.page-about .about-team__media {
  margin: 0;
  border: 1px solid var(--about-hair);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel-deep);
}

.page-about .about-team__media .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 05 资质 ---------- */
.page-about .about-cred {
  margin-top: clamp(24px, 6vw, 46px);
  padding: clamp(24px, 5vw, 44px);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
  box-shadow: 0 26px 64px rgba(124, 77, 255, .24);
}

.page-about .about-cred__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .about-cred__item {
  display: grid;
  gap: 6px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(5, 7, 15, .12);
}

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

.page-about .about-cred__key {
  font-size: clamp(19px, 4.6vw, 24px);
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--violet);
}

.page-about .about-cred__desc {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(5, 7, 15, .74);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding-block: clamp(48px, 9vw, 96px);
}

.page-about .about-cta__inner {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 6vw, 48px);
  border: 1px solid var(--about-hair);
  border-radius: var(--radius);
  background:
    radial-gradient(70% 120% at 12% 0%, rgba(124, 77, 255, .3), transparent 62%),
    radial-gradient(50% 100% at 92% 100%, rgba(255, 61, 218, .16), transparent 66%),
    linear-gradient(150deg, rgba(17, 26, 51, .95), rgba(7, 11, 24, .94));
}

.page-about .about-cta__title {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-size: clamp(20px, 5vw, 30px);
  line-height: 1.3;
  color: var(--paper);
}

.page-about .about-cta__text {
  margin: 0 0 22px;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--haze);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 768px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-history {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, .96fr);
    align-items: start;
  }

  .page-about .about-timeline__item:nth-child(2) {
    margin-left: 5%;
  }

  .page-about .about-timeline__item:nth-child(3) {
    margin-left: 10%;
  }

  .page-about .about-timeline__item:nth-child(4) {
    margin-left: 3%;
  }

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

  .page-about .about-node:nth-child(2) {
    margin-top: 40px;
  }

  .page-about .about-node:nth-child(3) {
    margin-top: 80px;
  }

  .page-about .about-eco {
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
    align-items: start;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1fr) minmax(0, .88fr);
    align-items: stretch;
  }

  .page-about .about-team__media {
    grid-column: 2;
    grid-row: 1 / span 2;
    height: 100%;
  }

  .page-about .about-team__media .media-frame__img {
    height: 100%;
    object-fit: cover;
  }

  .page-about .about-cred__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px 40px;
  }

  .page-about .about-cred__item:nth-last-child(2) {
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(5, 7, 15, .12);
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero__title {
    max-width: 24ch;
  }

  .page-about .about-node {
    padding: 34px 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-node,
  .page-about .about-toc__link,
  .page-about .about-eco__item {
    transition: none;
  }

  .page-about .about-node:hover,
  .page-about .about-toc__link:hover {
    transform: none;
  }
}