.page-about {
  --about-line-grad: linear-gradient(180deg, rgba(52, 152, 219, 0.55), rgba(212, 175, 55, 0.4) 60%, rgba(230, 126, 34, 0.5));
  background: var(--c-white);
  color: var(--c-ink);
  overflow-x: hidden;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-head);
}

.page-about h1 {
  font-size: clamp(34px, 5vw, 56px);
  font-weight: 700;
  line-height: 1.05;
}

.page-about h2 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  line-height: 1.12;
}

.page-about h3 {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.3;
}

.page-about .crumbs {
  max-width: var(--container);
  margin: 0 auto;
  padding: 24px 24px 0;
  font-size: 14px;
}

.page-about .crumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  padding: 0;
  margin: 0;
  color: var(--c-sand);
}

.page-about .crumbs__list li:not(:last-child)::after {
  content: "/";
  margin-left: 6px;
  color: var(--c-sand);
}

.page-about .about-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-lake);
  margin-bottom: 10px;
}

.page-about .about-eyebrow::before {
  content: "";
  width: 28px;
  height: 2px;
  border-radius: 2px;
  background: var(--c-lake);
}

/* ========== 我们是谁 ========== */
.page-about .about-hero {
  position: relative;
  padding: 48px 0 64px;
  background:
    radial-gradient(80% 60% at 85% 0%, rgba(52, 152, 219, 0.08), transparent 70%),
    var(--c-white);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 32px;
  align-items: center;
}

.page-about .about-hero__media {
  margin: 0;
}

.page-about .about-hero__media img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
}

.page-about .about-hero h1 {
  color: var(--c-hl);
  margin: 0 0 6px;
}

.page-about .about-hero__lead {
  font-family: var(--font-head);
  font-size: clamp(17px, 2vw, 22px);
  font-weight: 600;
  color: var(--c-sun);
  margin: 0 0 20px;
}

.page-about .about-hero__desc {
  font-size: 16px;
  line-height: 1.85;
  max-width: 560px;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

/* ========== 发展历程 ========== */
.page-about .about-journey {
  padding: 64px 0 72px;
  background:
    radial-gradient(1px 1px at 20% 30%, rgba(255, 255, 255, 0.4), transparent),
    radial-gradient(1px 1px at 80% 20%, rgba(255, 255, 255, 0.3), transparent),
    radial-gradient(1px 1px at 70% 60%, rgba(212, 175, 55, 0.3), transparent),
    radial-gradient(1px 1px at 30% 80%, rgba(52, 152, 219, 0.35), transparent),
    var(--c-deep);
}

.page-about .about-journey__head {
  max-width: 640px;
  margin: 0 auto 28px;
  text-align: center;
}

.page-about .about-journey__head .about-eyebrow {
  justify-content: center;
}

.page-about .about-journey__head .about-eyebrow::after {
  content: "";
  width: 28px;
  height: 2px;
  border-radius: 2px;
  background: var(--c-lake);
}

.page-about .about-journey h2 {
  color: var(--c-white);
}

.page-about .about-journey__lead {
  color: rgba(242, 246, 249, 0.7);
  font-size: 15px;
  line-height: 1.8;
}

.page-about .about-journey__decor {
  margin: 0 auto 40px;
}

.page-about .about-journey__decor img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-md);
  opacity: 0.7;
}

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 40px;
  max-width: 720px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 20px;
  width: 2px;
  background: var(--about-line-grad);
  opacity: 0.5;
}

.page-about .about-timeline__item {
  position: relative;
  margin-bottom: 28px;
}

.page-about .about-timeline__mark {
  position: absolute;
  left: -30px;
  top: 22px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--c-white);
  border: 4px solid var(--c-lake);
  box-shadow: 0 0 0 4px rgba(52, 152, 219, 0.2);
}

.page-about .about-timeline__card {
  background: rgba(242, 246, 249, 0.06);
  border: 1px solid rgba(242, 246, 249, 0.1);
  border-radius: var(--radius-md);
  padding: 20px 22px;
  backdrop-filter: blur(6px);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.page-about .about-timeline__card:hover {
  transform: translateY(-3px);
  border-color: rgba(212, 175, 55, 0.5);
}

.page-about .about-timeline__year {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--c-gold);
  margin-bottom: 6px;
}

.page-about .about-timeline h3 {
  color: var(--c-white);
  margin: 0 0 8px;
}

.page-about .about-timeline p {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(242, 246, 249, 0.75);
  margin: 0;
}

/* ========== 核心理念 ========== */
.page-about .about-philosophy {
  padding: 64px 0;
  background: var(--c-white);
}

.page-about .about-philosophy__head {
  max-width: 640px;
  margin: 0 auto 40px;
  text-align: center;
}

.page-about .about-philosophy__head .about-eyebrow {
  justify-content: center;
}

.page-about .about-philosophy__head h2 {
  color: var(--c-hl);
}

.page-about .about-philosophy__lead {
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-ink);
  opacity: 0.75;
}

.page-about .about-philosophy__cards {
  display: grid;
  gap: 24px;
}

.page-about .about-philosophy__card {
  background: var(--c-white);
  border: 1px solid var(--c-sand);
  border-top: 3px solid var(--c-lake);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: 0 8px 30px rgba(11, 29, 57, 0.06);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.page-about .about-philosophy__card:hover {
  transform: translateY(-4px);
  border-color: var(--c-lake);
}

.page-about .about-philosophy__card:nth-child(2) {
  border-top-color: var(--c-gold);
}

.page-about .about-philosophy__card:nth-child(2):hover {
  border-color: var(--c-gold);
}

.page-about .about-philosophy__card:nth-child(3) {
  border-top-color: var(--c-sun);
}

.page-about .about-philosophy__card:nth-child(3):hover {
  border-color: var(--c-sun);
}

.page-about .about-philosophy__num {
  display: block;
  font-family: var(--font-head);
  font-size: 42px;
  font-weight: 700;
  line-height: 1;
  color: rgba(27, 58, 107, 0.15);
  margin-bottom: 18px;
}

.page-about .about-philosophy__card h3 {
  color: var(--c-hl);
  margin: 0 0 10px;
}

.page-about .about-philosophy__card p {
  font-size: 15px;
  line-height: 1.8;
  margin: 0;
}

/* ========== 青海根脉 ========== */
.page-about .about-qinghai {
  padding: 64px 0;
  background: var(--c-hl);
  color: var(--c-white);
}

.page-about .about-qinghai__grid {
  display: grid;
  gap: 40px;
  align-items: center;
}

.page-about .about-qinghai .about-eyebrow {
  color: var(--c-gold);
}

.page-about .about-qinghai .about-eyebrow::before {
  background: var(--c-gold);
}

.page-about .about-qinghai h2 {
  color: var(--c-white);
}

.page-about .about-qinghai__lead {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.7;
  margin-bottom: 16px;
}

.page-about .about-qinghai__content p:not(.about-qinghai__lead) {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(242, 246, 249, 0.75);
}

.page-about .about-qinghai__contour {
  display: block;
  width: 100%;
  max-width: 480px;
  height: auto;
  margin: 20px 0 0;
}

.page-about .about-qinghai__quote {
  margin: 24px 0 0;
  padding: 20px 24px;
  border-left: 3px solid var(--c-gold);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: rgba(242, 246, 249, 0.06);
  font-family: var(--font-head);
  font-size: 17px;
  line-height: 1.6;
  color: var(--c-gold);
}

.page-about .about-qinghai__badges {
  display: grid;
  gap: 16px;
}

.page-about .about-qinghai__badge {
  background: rgba(242, 246, 249, 0.08);
  border: 1px solid rgba(242, 246, 249, 0.14);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  text-align: center;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--c-white);
  backdrop-filter: blur(4px);
}

/* ========== 数字说话 ========== */
.page-about .about-stats {
  padding: 64px 0;
  background: var(--c-white);
}

.page-about .about-stats__head {
  max-width: 640px;
  margin: 0 auto 40px;
  text-align: center;
}

.page-about .about-stats__head .about-eyebrow {
  justify-content: center;
}

.page-about .about-stats__head h2 {
  color: var(--c-hl);
}

.page-about .about-stats__lead {
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-ink);
  opacity: 0.75;
}

.page-about .about-stats__wrap {
  display: grid;
  gap: 32px;
  align-items: center;
}

.page-about .about-stats__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.page-about .about-stats__item {
  background: var(--c-white);
  border: 1px solid var(--c-sand);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  text-align: center;
  box-shadow: var(--shadow-soft);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.page-about .about-stats__item:hover {
  transform: translateY(-4px);
  border-color: var(--c-lake);
}

.page-about .about-stats__num {
  display: block;
  font-family: var(--font-head);
  font-size: 34px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--c-lake);
}

.page-about .about-stats__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  color: var(--c-ink);
  opacity: 0.7;
}

.page-about .about-stats__media {
  margin: 0;
}

.page-about .about-stats__media img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
}

.page-about .about-stats__trust {
  margin-top: 40px;
  padding: 24px 28px;
  background: var(--c-deep);
  border-radius: var(--radius-lg);
  color: rgba(242, 246, 249, 0.85);
  font-size: 15px;
  line-height: 1.8;
  text-align: center;
}

.page-about .about-stats__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 28px;
}

/* ========== 响应式 ========== */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 64px 0 80px;
  }

  .page-about .about-journey {
    padding: 80px 0 88px;
  }

  .page-about .about-timeline {
    max-width: 880px;
    margin: 0 auto;
    padding: 0;
  }

  .page-about .about-timeline::before {
    left: 50%;
    transform: translateX(-50%);
  }

  .page-about .about-timeline__item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: 56px;
  }

  .page-about .about-timeline__mark {
    left: 50%;
    top: 28px;
    transform: translateX(-50%);
  }

  .page-about .about-timeline__item:nth-child(odd) .about-timeline__card {
    grid-column: 1;
    text-align: right;
  }

  .page-about .about-timeline__item:nth-child(even) .about-timeline__card {
    grid-column: 2;
  }

  .page-about .about-philosophy {
    padding: 80px 0;
  }

  .page-about .about-philosophy__cards {
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
  }

  .page-about .about-philosophy__card:nth-child(2) {
    margin-top: 24px;
  }

  .page-about .about-philosophy__card:nth-child(3) {
    margin-top: 8px;
  }

  .page-about .about-qinghai {
    padding: 80px 0;
  }

  .page-about .about-qinghai__grid {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 56px;
  }

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

  .page-about .about-stats {
    padding: 80px 0;
  }

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

@media (min-width: 1024px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1fr 1.1fr;
    gap: 56px;
  }

  .page-about .about-stats__wrap {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
  }

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