.page-about {
  --about-gold-line: #C9A227;
  --about-gold-light: #F0D98C;
  --about-accent: #FF6B35;
  --about-cyan: #00E5FF;
  --about-violet: #7B2FFF;
  background-color: var(--neutral-canvas);
  color: var(--dark-slate);
  max-width: 100%;
  overflow-x: hidden;
}

.page-about .breadcrumbs {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-4) var(--space-4) 0;
  font-family: var(--font-heading);
  font-size: 13px;
  letter-spacing: .02em;
}

/* ==================== 首屏框景 + 品牌起源 ==================== */
.page-about .about-hero {
  position: relative;
  max-width: calc(var(--container-max) + 48px);
  margin: var(--space-3) auto var(--space-6);
  padding: var(--space-3);
  background: linear-gradient(135deg, rgba(10, 29, 63, .94) 20%, rgba(201, 162, 39, .35) 120%);
  border: 1px solid rgba(201, 162, 39, .6);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  color: #fff;
}

.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .18;
  z-index: 0;
}

.page-about .about-hero .frame__corner {
  border-color: rgba(240, 217, 140, .75);
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--space-5);
  padding: var(--space-4) var(--space-2);
  isolation: isolate;
}

.page-about .about-hero h1 {
  margin: var(--space-3) 0;
  font-family: var(--font-heading);
  font-size: clamp(30px, 5vw, 54px);
  font-weight: 900;
  line-height: 1.15;
  color: #fff;
}

.page-about .about-hero__lead {
  max-width: 38em;
  margin: 0 0 var(--space-4);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
  color: rgba(255, 255, 255, .92);
}

.page-about .about-hero__principles {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--golden-highlight);
}

.page-about .about-origin {
  padding: var(--space-5);
  background: rgba(245, 242, 235, .08);
  border: 1px solid rgba(240, 217, 140, .35);
  border-left: 4px solid var(--royal-gold);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.page-about .about-origin .eyebrow {
  color: var(--golden-highlight);
}

.page-about .about-origin h2 {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 800;
  color: var(--golden-highlight);
}

.page-about .about-origin p {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.75;
  color: rgba(255, 255, 255, .86);
}

.page-about .about-origin .btn {
  margin-top: var(--space-3);
}

/* ==================== 发展里程碑 ==================== */
.page-about .about-milestones {
  position: relative;
  padding: var(--space-6) 0 var(--space-7);
  background: linear-gradient(160deg, var(--deep-blue) 40%, #07142E 100%);
  color: #fff;
  overflow: hidden;
}

.page-about .about-milestones::before {
  content: "";
  position: absolute;
  top: 0;
  right: -8%;
  width: 70%;
  height: 100%;
  background: linear-gradient(180deg, rgba(255, 107, 53, .07), rgba(123, 47, 255, .05));
  transform: skewX(-12deg);
  pointer-events: none;
}

.page-about .about-milestones__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--space-6);
}

.page-about .about-milestones__media img {
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: 1px solid rgba(201, 162, 39, .4);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}

.page-about .about-milestones .section-title {
  color: #fff;
}

.page-about .about-milestones .section-subtitle {
  color: rgba(255, 255, 255, .75);
}

.page-about .about-timeline {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline .timeline__item {
  position: relative;
  margin: 0;
  padding: 0 0 var(--space-5) var(--space-5);
  border-left: 1px solid rgba(201, 162, 39, .35);
}

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

.page-about .about-timeline .timeline__item::before {
  content: "";
  position: absolute;
  top: 4px;
  left: -6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--royal-gold), var(--golden-highlight));
  box-shadow: 0 0 0 4px rgba(201, 162, 39, .22);
  transition: box-shadow var(--transition);
}

.page-about .about-timeline .timeline__item:hover::before,
.page-about .about-timeline .timeline__item:focus-within::before {
  box-shadow: 0 0 0 6px rgba(201, 162, 39, .3);
}

.page-about .about-timeline .timeline__time {
  display: inline-block;
  margin-bottom: var(--space-2);
  padding: 2px 10px;
  background: rgba(255, 107, 53, .12);
  border-radius: 999px;
  font-family: var(--font-data);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .08em;
  color: var(--orange-pop);
}

.page-about .about-timeline .timeline__title {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-size: 19px;
  font-weight: 800;
  color: var(--golden-highlight);
}

.page-about .about-timeline .timeline__desc {
  max-width: 36em;
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.7;
  color: rgba(255, 255, 255, .8);
}

.page-about .about-timeline .timeline__item:hover .timeline__desc {
  color: #fff;
}

/* ==================== 数据与服务 ==================== */
.page-about .about-data {
  position: relative;
  padding: var(--space-6) 0 var(--space-7);
  background: var(--neutral-canvas);
}

.page-about .about-data__media {
  margin: var(--space-5) 0;
}

.page-about .about-data__media img {
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: 1px solid var(--light-grey);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}

.page-about .about-data__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  margin: var(--space-5) 0;
}

.page-about .about-data .stat {
  padding: var(--space-4);
  background: var(--deep-blue);
  border: 1px solid rgba(201, 162, 39, .35);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.page-about .about-data .stat__label {
  margin-top: var(--space-1);
  color: rgba(255, 255, 255, .72);
}

.page-about .about-data__cards {
  margin-top: var(--space-5);
}

.page-about .about-data__note {
  margin-top: var(--space-5);
  padding: var(--space-3) var(--space-4);
  background: #fff;
  border-left: 4px solid var(--orange-pop);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.7;
}

/* ==================== 资质与认可 ==================== */
.page-about .about-credentials {
  position: relative;
  padding: var(--space-6) 0 var(--space-7);
  background: var(--deep-blue);
  color: #fff;
  overflow: hidden;
}

.page-about .about-credentials::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: -5%;
  width: 60%;
  height: 55%;
  background: linear-gradient(120deg, rgba(0, 229, 255, .08), rgba(123, 47, 255, .06));
  transform: skewX(10deg);
  pointer-events: none;
}

.page-about .about-credentials .section-title {
  color: #fff;
}

.page-about .about-credentials .section-subtitle {
  color: rgba(255, 255, 255, .72);
}

.page-about .about-credentials__layout {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-5);
}

.page-about .about-credentials__card {
  display: flex;
  flex-direction: column;
}

.page-about .about-credentials__card .card__body {
  margin-top: auto;
}

.page-about .about-credentials__num {
  display: inline-block;
  margin-bottom: var(--space-2);
  font-family: var(--font-data);
  font-size: 14px;
  letter-spacing: .08em;
  color: var(--orange-pop);
}

.page-about .about-credentials__team {
  padding: var(--space-5);
  background: rgba(245, 242, 235, .07);
  border: 1px solid rgba(240, 217, 140, .3);
  border-radius: var(--radius);
}

.page-about .about-credentials__team-title {
  margin: var(--space-1) 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 800;
  color: var(--golden-highlight);
}

.page-about .about-credentials__team-nums {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-3);
}

.page-about .about-credentials__team-num {
  display: flex;
  align-items: baseline;
  font-family: var(--font-data);
  font-size: 26px;
  font-weight: 700;
  color: var(--electric-cyan);
}

.page-about .about-credentials__team-num span {
  margin-left: var(--space-2);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 400;
  color: rgba(255, 255, 255, .8);
}

.page-about .about-credentials__team-copy {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.7;
  color: rgba(255, 255, 255, .82);
}

/* ==================== 合作生态 ==================== */
.page-about .about-ecosystem {
  padding: var(--space-6) 0 var(--space-7);
  background: var(--neutral-canvas);
}

.page-about .about-ecosystem__grid {
  margin-top: var(--space-5);
}

.page-about .about-ecosystem__card {
  display: flex;
  flex-direction: column;
  min-height: 240px;
}

.page-about .about-ecosystem__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: auto;
}

.page-about .about-ecosystem__card .btn {
  margin-top: auto;
  align-self: flex-start;
}

/* ==================== 公告栏目 ==================== */
.page-about .about-announcements {
  position: relative;
  padding: var(--space-6) 0 var(--space-7);
  background: linear-gradient(160deg, var(--deep-blue) 30%, #07142E 100%);
  color: #fff;
  overflow: hidden;
}

.page-about .about-announcements .section-title {
  color: #fff;
}

.page-about .about-announcements .section-subtitle {
  color: rgba(255, 255, 255, .75);
}

.page-about .about-announcements__grid {
  margin-top: var(--space-5);
}

.page-about .about-announcements__card {
  background: rgba(245, 242, 235, .06);
  border: 1px solid rgba(201, 162, 39, .3);
  color: #fff;
}

.page-about .about-announcements__card .card__title {
  color: var(--golden-highlight);
}

.page-about .about-announcements__card .card__body {
  color: rgba(255, 255, 255, .8);
}

.page-about .about-announcements__link {
  display: flex;
  justify-content: flex-start;
  margin-top: var(--space-5);
}

/* ==================== 站内导览 ==================== */
.page-about .about-links {
  padding: var(--space-6) 0;
  background: var(--neutral-canvas);
}

.page-about .about-links__grid {
  margin-top: var(--space-5);
}

.page-about .about-links__link {
  display: block;
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.page-about .about-links__link:hover,
.page-about .about-links__link:focus-visible {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--royal-gold);
}

.page-about .about-links__link .card__title {
  display: block;
  margin-bottom: var(--space-1);
}

.page-about .about-links__link .card__body {
  display: block;
  color: var(--dark-slate);
}

/* ==================== 平板与桌面布局 ==================== */
@media (min-width: 768px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.25fr .95fr;
    align-items: stretch;
    gap: var(--space-6);
    padding: var(--space-5);
  }

  .page-about .about-milestones__grid {
    grid-template-columns: 5fr 7fr;
    align-items: center;
    gap: var(--space-6);
  }

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

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

  .page-about .about-credentials__team {
    grid-column: 1 / -1;
  }

  .page-about .about-credentials__team-nums {
    gap: var(--space-6);
  }
}

@media (min-width: 1024px) {
  .page-about .about-milestones__grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-credentials__layout {
    grid-template-columns: 1fr 1fr 1.2fr;
  }

  .page-about .about-credentials__team {
    grid-column: auto;
  }

  .page-about .about-credentials__team-nums {
    flex-direction: column;
    gap: var(--space-2);
  }

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