.page-about {
  background: var(--color-snow);
  overflow-x: hidden;
}

/* ===== 首屏品牌宣言 ===== */
.page-about__hero {
  position: relative;
  background: linear-gradient(135deg, var(--color-primary-deep) 0%, var(--color-primary) 82%);
  color: var(--color-snow);
  padding: 44px 0 112px;
  overflow: hidden;
}

.page-about__hero-inner {
  display: grid;
  gap: 44px;
  align-items: center;
}

.page-about__hero-copy {
  position: relative;
  z-index: 2;
}

.page-about__hero-copy h1 {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(36px, 5.6vw, 64px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--color-snow);
  margin: 0 0 22px;
}

.page-about__hero-desc {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(245, 247, 250, 0.86);
  max-width: 34em;
  margin: 0 0 30px;
}

.page-about__hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about__hero-actions .btn--outline {
  border-color: rgba(245, 247, 250, 0.7);
  color: var(--color-snow);
}

.page-about__hero-actions .btn--outline:hover {
  background: rgba(245, 247, 250, 0.12);
  color: #fff;
}

.page-about__hero-media {
  position: relative;
  z-index: 2;
}

.page-about__hero-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 420px;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 50%;
  margin: 0 auto;
  border: 6px solid rgba(255, 193, 7, 0.6);
  box-shadow: 0 24px 64px rgba(10, 42, 74, 0.32);
}

.page-about__hero-peak {
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 88px;
  background: var(--color-snow);
  clip-path: polygon(0% 100%, 0% 64%, 10% 48%, 22% 76%, 32% 32%, 46% 62%, 62% 18%, 76% 52%, 100% 0%, 100% 100%);
  pointer-events: none;
}

/* ===== 品牌故事 ===== */
.page-about__story {
  background: var(--color-snow);
  padding: 64px 0;
}

.page-about__story-header {
  margin-bottom: 36px;
}

.page-about__story-grid {
  display: grid;
  gap: 32px;
}

.page-about__story-lead p {
  font-size: 18px;
  font-weight: 400;
  line-height: 1.8;
  color: var(--color-primary-deep);
  margin: 0;
}

.page-about__story-extra p {
  font-size: 15px;
  font-weight: 300;
  line-height: 1.8;
  color: var(--color-gray);
  margin: 0 0 16px;
}

.page-about__story-extra p:last-child {
  margin-bottom: 0;
}

/* ===== 共享标题排版 ===== */
.page-about__story-header h2,
.page-about__cap-head h2,
.page-about__milestones-header h2,
.page-about__honors h2,
.page-about__culture h2,
.page-about__next h2 {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(28px, 3.6vw, 44px);
  line-height: 1.12;
  letter-spacing: -0.015em;
  color: var(--color-ink);
  margin: 0 0 16px;
}

.page-about__milestones-header h2,
.page-about__next h2 {
  color: var(--color-snow);
}

/* ===== kicker 眉题 ===== */
.page-about__kicker {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gray);
  margin: 0 0 16px;
}

.page-about__kicker--light {
  color: var(--color-gold);
}

/* ===== 发展里程碑 ===== */
.page-about__milestones {
  background: var(--color-primary-deep);
  color: var(--color-snow);
  padding: 64px 0 80px;
  position: relative;
}

.page-about__milestones-header {
  margin-bottom: 8px;
}

.page-about__milestones-header p:last-child {
  font-size: 15px;
  font-weight: 300;
  line-height: 1.7;
  color: rgba(245, 247, 250, 0.7);
  margin: 0;
}

.page-about__timeline-bg {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 1;
  object-fit: cover;
  border-radius: 4px;
  margin: 28px 0 48px;
  opacity: 0.45;
}

.page-about__timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.page-about__timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 12px;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-gold), var(--color-emerald));
}

.page-about__milestone {
  position: relative;
  padding-left: 44px;
}

.page-about__milestone::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-gold);
  border: 3px solid var(--color-primary-deep);
  box-shadow: 0 0 0 2px var(--color-gold);
  transition: transform var(--transition-fast);
}

.page-about__milestone:hover::before {
  transform: scale(1.3);
}

.page-about__milestone-year {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--color-gold);
  margin-bottom: 8px;
}

.page-about__milestone-card {
  background: rgba(245, 247, 250, 0.06);
  border-left: 3px solid var(--color-gold);
  border-radius: 0 12px 12px 0;
  padding: 20px 22px;
  transition: background-color var(--transition-base);
}

.page-about__milestone-card:hover {
  background: rgba(245, 247, 250, 0.14);
}

.page-about__milestone-card h3 {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-snow);
  margin: 0 0 8px;
}

.page-about__milestone-card p {
  font-size: 14px;
  font-weight: 300;
  line-height: 1.7;
  color: rgba(245, 247, 250, 0.74);
  margin: 0;
}

/* ===== 服务能力 ===== */
.page-about__capabilities {
  background: var(--color-snow);
  padding: 64px 0;
}

.page-about__cap-head p:last-child {
  font-size: 15px;
  font-weight: 300;
  color: var(--color-gray);
  margin: 0;
}

.page-about__cap-grid {
  display: grid;
  gap: 40px;
  margin: 40px 0 0;
}

.page-about__cap-illustration img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 380px;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 20px;
  margin: 0 auto;
}

.page-about__cap-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 14px;
}

.page-about__cap-item {
  background: var(--color-pale-blue);
  border-radius: 12px;
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.page-about__cap-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(10, 42, 74, 0.12);
}

.page-about__cap-num {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.1;
}

.page-about__cap-label {
  font-size: 14px;
  font-weight: 400;
  color: var(--color-gray);
}

.page-about__cap-bottom {
  margin-top: 40px;
  padding: 24px;
  background: var(--color-primary-deep);
  border-radius: 16px;
}

.page-about__cap-bottom p {
  color: var(--color-snow);
  font-size: 15px;
  font-weight: 300;
  line-height: 1.75;
  margin: 0;
}

/* ===== 资质与荣誉 ===== */
.page-about__honors {
  background: var(--color-pale-blue);
  padding: 64px 0;
}

.page-about__honor-grid {
  display: grid;
  gap: 16px;
  margin-top: 32px;
}

.page-about__honor-card {
  background: var(--color-snow);
  border-radius: 16px;
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  border-left: 4px solid var(--color-gold);
  transition: background-color var(--transition-base), transform var(--transition-base);
}

.page-about__honor-card:hover {
  background: var(--color-gold);
  transform: scale(1.02);
}

.page-about__honor-icon {
  font-size: 24px;
  color: var(--color-gold);
  transition: color var(--transition-fast);
}

.page-about__honor-card:hover .page-about__honor-icon {
  color: var(--color-primary-deep);
}

.page-about__honor-card:hover h3 {
  color: var(--color-primary-deep);
}

.page-about__honor-card:hover p {
  color: rgba(10, 42, 74, 0.8);
}

.page-about__honor-card h3 {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-ink);
  margin: 0;
  transition: color var(--transition-fast);
}

.page-about__honor-card p {
  font-size: 14px;
  font-weight: 300;
  line-height: 1.7;
  color: var(--color-gray);
  margin: 0;
  transition: color var(--transition-fast);
}

/* ===== 本地文化融合 ===== */
.page-about__culture {
  background: var(--color-snow);
  padding: 64px 0;
}

.page-about__culture-lead {
  font-size: 18px;
  font-weight: 300;
  line-height: 1.7;
  color: var(--color-gray);
  max-width: 42em;
  margin: 0 0 40px;
}

.page-about__culture-grid {
  display: grid;
  gap: 8px;
}

.page-about__culture-item {
  border-top: 1px solid rgba(93, 109, 126, 0.25);
  padding: 26px 0;
}

.page-about__culture-item h3 {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary-deep);
  margin: 0 0 10px;
}

.page-about__culture-item p {
  font-size: 15px;
  font-weight: 300;
  line-height: 1.75;
  color: var(--color-gray);
  margin: 0;
}

.page-about__swatches {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 40px;
}

.page-about__swatch {
  border-radius: 12px;
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 14px;
  font-weight: 600;
}

.page-about__swatch--primary {
  background: var(--color-primary-deep);
  color: var(--color-snow);
}

.page-about__swatch--snow {
  background: var(--color-snow);
  color: var(--color-ink);
  border: 1px solid var(--color-pale-blue);
}

.page-about__swatch--gold {
  background: var(--color-gold);
  color: var(--color-primary-deep);
}

.page-about__swatch--emerald {
  background: var(--color-emerald);
  color: var(--color-primary-deep);
}

.page-about__swatch .mono {
  font-size: 12px;
  font-weight: 400;
  opacity: 0.8;
}

/* ===== 底部继续探索 ===== */
.page-about__next {
  background: var(--color-primary);
  color: var(--color-snow);
  padding: 56px 0;
}

.page-about__next-inner {
  text-align: center;
}

.page-about__next p {
  font-size: 16px;
  font-weight: 300;
  color: rgba(245, 247, 250, 0.85);
  margin: 0 0 32px;
}

.page-about__next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.page-about__next .btn--outline {
  border-color: rgba(245, 247, 250, 0.7);
  color: var(--color-snow);
}

.page-about__next .btn--outline:hover {
  background: rgba(245, 247, 250, 0.12);
  color: #fff;
}

.page-about__next-contact {
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid rgba(245, 247, 250, 0.2);
}

.page-about__next-contact p {
  margin: 0 0 6px;
  font-size: 14px;
}

.page-about__next-contact .mono {
  font-size: 15px;
  letter-spacing: 0.02em;
  margin: 0;
}

/* ===== 桌面端适配 ===== */
@media (min-width: 768px) {
  .page-about__hero {
    padding: 80px 0 132px;
  }

  .page-about__hero-inner {
    grid-template-columns: 1.08fr 0.92fr;
    gap: 56px;
  }

  .page-about__hero-media img {
    max-width: 460px;
  }

  .page-about__story {
    padding: 88px 0;
  }

  .page-about__story-grid {
    grid-template-columns: 1fr 1fr;
    gap: 56px;
  }

  .page-about__story-lead p {
    font-size: 20px;
  }

  .page-about__milestones {
    padding: 88px 0 104px;
  }

  .page-about__milestones-header {
    max-width: 600px;
  }

  .page-about__timeline-bg {
    margin: 40px 0 64px;
  }

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

  .page-about__milestone {
    width: 50%;
    padding-left: 0;
    padding-right: 48px;
  }

  .page-about__milestone::before {
    left: auto;
    right: -8px;
  }

  .page-about__milestone--right {
    margin-left: 50%;
    padding-left: 48px;
    padding-right: 0;
  }

  .page-about__milestone--right::before {
    left: -8px;
    right: auto;
  }

  .page-about__milestone-card {
    text-align: right;
    border-left: none;
    border-right: 3px solid var(--color-gold);
    border-radius: 12px 0 0 12px;
  }

  .page-about__milestone--right .page-about__milestone-card {
    text-align: left;
    border-left: 3px solid var(--color-gold);
    border-right: none;
    border-radius: 0 12px 12px 0;
  }

  .page-about__milestone-year {
    font-size: 26px;
  }

  .page-about__capabilities {
    padding: 88px 0;
  }

  .page-about__cap-grid {
    grid-template-columns: 0.72fr 1.28fr;
    align-items: center;
    gap: 56px;
  }

  .page-about__cap-list {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }

  .page-about__cap-item {
    padding: 28px 24px;
  }

  .page-about__cap-num {
    font-size: 34px;
  }

  .page-about__cap-bottom {
    margin-top: 56px;
    padding: 28px 32px;
  }

  .page-about__honors {
    padding: 88px 0;
  }

  .page-about__honor-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .page-about__culture {
    padding: 88px 0;
  }

  .page-about__culture-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
  }

  .page-about__culture-item {
    padding: 28px 0;
  }

  .page-about__swatches {
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
  }

  .page-about__next {
    padding: 72px 0;
  }
}