.page-about {
  --about-gap: clamp(24px, 4vw, 64px);
  --about-narrow: 300px;
  --gold-line: rgba(212, 175, 55, 0.32);
  --gold-line-soft: rgba(212, 175, 55, 0.14);
  --grid-line: rgba(242, 245, 243, 0.06);
}

.page-about .about-breadcrumb-wrap {
  padding-top: 14px;
  padding-bottom: 14px;
}

/* 品牌立场 */
.page-about .about-stance {
  position: relative;
  overflow: hidden;
  background-color: var(--c-bg);
  padding-top: clamp(40px, 7vw, 96px);
  padding-bottom: clamp(56px, 8vw, 120px);
}

.page-about .about-stance::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 36px 36px;
  pointer-events: none;
}

.page-about .about-stance-main {
  position: relative;
  z-index: 1;
}

.page-about .about-stance-title {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-size: clamp(38px, 6.4vw, 68px);
  line-height: 1.08;
  color: var(--c-text);
}

.page-about .about-stance-subtitle {
  margin: 14px 0 0;
  color: var(--c-gold);
  font-size: 15px;
  letter-spacing: 0.18em;
}

.page-about .about-stance-lead {
  margin: 28px 0 0;
  max-width: 72ch;
  color: var(--c-text);
  font-size: 18px;
  line-height: 1.7;
}

.page-about .about-stance-text {
  margin: 14px 0 0;
  max-width: 72ch;
  color: var(--c-muted);
  font-size: 16px;
  line-height: 1.7;
}

.page-about .about-stance-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-stance-figure {
  margin: clamp(32px, 5vw, 56px) 0 0;
}

.page-about .about-stance-image {
  display: block;
  width: 100%;
  max-width: 500px;
  height: auto;
  object-fit: cover;
}

.page-about .about-stance-figure figcaption {
  margin-top: 10px;
  max-width: 420px;
  color: var(--c-muted);
  font-size: 13px;
  line-height: 1.5;
}

.page-about .about-stance-aside {
  padding-top: 28px;
  border-top: 2px solid var(--c-gold);
}

.page-about .about-aside-label {
  color: var(--c-muted);
  font-size: 13px;
  letter-spacing: 0.2em;
}

.page-about .about-fact-list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-fact-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--grid-line);
}

.page-about .about-fact-row dt {
  color: var(--c-muted);
  font-size: 14px;
}

.page-about .about-fact-row dd {
  margin: 0;
  color: var(--c-text);
  font-family: var(--font-mono);
  font-size: 15px;
  text-align: right;
}

.page-about .about-aside-quote {
  margin-top: 24px;
  padding-left: 16px;
  border-left: 2px solid var(--c-gold);
  color: var(--c-gold);
  font-size: 16px;
  line-height: 1.55;
}

/* 发展历程 */
.page-about .about-milestones {
  position: relative;
  background-color: var(--c-bg-alt);
  padding-top: clamp(56px, 8vw, 112px);
  padding-bottom: clamp(56px, 8vw, 112px);
}

.page-about .about-milestones-head {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: clamp(36px, 5vw, 64px);
}

.page-about .about-milestones-title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(28px, 4.4vw, 44px);
  color: var(--c-text);
}

.page-about .about-milestones-lead {
  margin: 16px 0 0;
  max-width: 62ch;
  color: var(--c-muted);
  font-size: 16px;
  line-height: 1.7;
}

.page-about .about-milestones-note {
  margin: 0;
  color: var(--c-gold);
  font-family: var(--font-mono);
  font-size: 18px;
}

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

.page-about .about-milestone {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 12px 18px;
  padding: 22px 0;
  border-top: 1px solid var(--gold-line-soft);
}

.page-about .about-milestone:last-child {
  border-bottom: 1px solid var(--gold-line-soft);
}

.page-about .milestone-meta {
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-about .milestone-year {
  color: var(--c-gold);
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
}

.page-about .milestone-line {
  display: none;
}

.page-about .milestone-body {
  min-width: 0;
}

.page-about .milestone-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 17px;
  color: var(--c-text);
}

.page-about .milestone-title a {
  color: inherit;
  text-decoration: none;
}

.page-about .milestone-title a:hover,
.page-about .milestone-title a:focus {
  color: var(--c-gold);
}

.page-about .milestone-title-row {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .milestone-lead {
  margin: 8px 0 0;
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.65;
}

.page-about .milestone-more {
  display: none;
  color: var(--c-gold);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-about .milestone-detail {
  margin: 8px 0 0;
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.7;
}

.page-about .about-milestones-banner {
  display: block;
  width: 100%;
  max-width: 600px;
  height: auto;
  margin-top: clamp(40px, 7vw, 72px);
  object-fit: cover;
}

/* 数据覆盖 */
.page-about .about-coverage {
  background-color: var(--c-bg);
  padding-top: clamp(56px, 8vw, 112px);
  padding-bottom: clamp(56px, 8vw, 112px);
}

.page-about .about-coverage-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}

.page-about .about-coverage-title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(28px, 4.4vw, 44px);
  color: var(--c-text);
}

.page-about .about-coverage-lead {
  margin: 18px 0 0;
  max-width: 60ch;
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.7;
}

.page-about .about-coverage-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-coverage-stats .stat {
  text-align: left;
  padding-top: 16px;
  border-top: 2px solid var(--c-gold);
}

.page-about .about-coverage-stats .stat-value {
  display: block;
  color: var(--c-gold);
  font-family: var(--font-mono);
  font-size: clamp(30px, 4vw, 44px);
}

.page-about .about-coverage-stats .stat-label {
  margin-top: 4px;
  color: var(--c-muted);
  font-size: 14px;
}

.page-about .about-coverage-note {
  margin-top: 28px;
  color: var(--c-gold);
  font-size: 14px;
}

.page-about .about-coverage-visual {
  position: relative;
  padding-top: clamp(24px, 4vw, 40px);
  border-top: 2px solid var(--c-gold);
}

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

.page-about .about-coverage-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.page-about .about-coverage-platforms {
  margin: 12px 0 0;
  color: var(--c-muted);
  font-size: 14px;
}

/* 服务理念 */
.page-about .about-philosophy {
  background-color: var(--c-bg);
  padding-top: clamp(56px, 8vw, 112px);
  padding-bottom: clamp(56px, 8vw, 112px);
}

.page-about .about-philosophy-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .about-philosophy-note {
  padding-top: 24px;
  border-top: 2px solid var(--c-gold);
}

.page-about .about-philosophy-index {
  margin: 16px 0 0;
  color: var(--c-muted);
  font-size: 16px;
}

.page-about .about-philosophy-main {
  padding-top: 24px;
  border-top: 2px solid var(--c-gold);
}

.page-about .about-philosophy-overline {
  margin-bottom: 16px;
  color: var(--c-gold);
  font-size: 14px;
  letter-spacing: 0.16em;
}

.page-about .about-philosophy-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 4vw, 42px);
  color: var(--c-text);
}

.page-about .about-philosophy-lead {
  margin: 20px 0 0;
  max-width: 68ch;
  color: var(--c-muted);
  font-size: 16px;
  line-height: 1.75;
}

.page-about .about-principles {
  margin-top: 36px;
}

.page-about .about-principle {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 16px;
  padding: 18px 0;
  border-top: 1px solid var(--gold-line-soft);
}

.page-about .about-principle-num {
  padding-top: 2px;
  color: var(--c-gold);
  font-size: 16px;
}

.page-about .about-principle-text h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 17px;
  color: var(--c-text);
}

.page-about .about-principle-text p {
  margin: 6px 0 0;
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.7;
}

.page-about .about-philosophy-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.page-about .about-philosophy-team {
  margin: 24px 0 0;
  padding-top: 16px;
  max-width: 62ch;
  border-top: 1px solid var(--gold-line-soft);
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.7;
}

@media (min-width: 760px) {
  .page-about .about-milestones-head {
    display: grid;
    grid-template-columns: 1fr 180px;
    align-items: start;
  }

  .page-about .about-milestones-note {
    text-align: right;
  }

  .page-about .about-milestone {
    grid-template-columns: 150px 24px 1fr;
    gap: 16px 24px;
    padding: 28px 0;
  }

  .page-about .milestone-line {
    display: block;
    height: 1px;
    align-self: center;
    background: linear-gradient(to right, var(--c-gold), transparent);
  }

  .page-about .milestone-title {
    font-size: 22px;
  }
}

@media (min-width: 900px) {
  .page-about .about-stance-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) var(--about-narrow);
    column-gap: var(--about-gap);
    align-items: start;
  }

  .page-about .about-stance-aside {
    margin-top: 132px;
  }

  .page-about .about-coverage-inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 560px);
    column-gap: var(--about-gap);
    align-items: start;
  }

  .page-about .about-philosophy-grid {
    grid-template-columns: 180px minmax(0, 1fr);
    column-gap: var(--about-gap);
  }
}

@media (min-width: 760px) and (hover: hover) {
  .page-about .milestone-detail {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.4s ease, opacity 0.3s ease;
  }

  .page-about .about-milestone:hover .milestone-detail,
  .page-about .about-milestone:focus-within .milestone-detail {
    max-height: 300px;
    opacity: 1;
  }

  .page-about .milestone-more {
    display: inline-flex;
  }

  .page-about .about-milestone:hover .milestone-more,
  .page-about .about-milestone:focus-within .milestone-more {
    color: var(--c-gold-bright);
  }
}