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

.page-about .breadcrumb {
  padding-top: 24px;
}

/* ---------- 首屏英雄区 ---------- */
.page-about .about-hero {
  padding: 32px 0 64px;
  position: relative;
  background:
    linear-gradient(rgba(0, 109, 119, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 109, 119, 0.05) 1px, transparent 1px);
  background-size: 28px 28px;
}

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

.page-about .about-hero-kicker {
  font-family: var(--font-caption);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.page-about .about-hero h1 {
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: clamp(30px, 5vw, 52px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--color-text);
  margin-bottom: 20px;
}

.page-about .about-hero-lead {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text-secondary);
  max-width: 52ch;
  margin-bottom: 28px;
}

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

.page-about .about-hero-panel {
  background: var(--color-dark);
  padding: 14px;
  border-top: 4px solid var(--color-accent);
}

.page-about .about-hero-figure {
  overflow: hidden;
  background: #1B2A3A;
}

.page-about .about-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: rgba(255, 255, 255, 0.08);
  margin-top: 14px;
}

.page-about .about-stat {
  padding: 14px 12px;
  background: var(--color-dark);
}

.page-about .about-stat-value {
  display: block;
  font-family: var(--font-caption);
  font-size: 22px;
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1.2;
}

.page-about .about-stat-label {
  display: block;
  font-family: var(--font-caption);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.68);
  margin-top: 6px;
}

/* ---------- 通用区块微调 ---------- */
.page-about .section-heading-row {
  margin-bottom: 36px;
}

.page-about .about-mission,
.page-about .about-milestone,
.page-about .about-process,
.page-about .about-team,
.page-about .about-more {
  scroll-margin-top: 96px;
}

/* ---------- 品牌使命 ---------- */
.page-about .about-mission {
  border-top: 1px solid var(--color-line);
}

.page-about .about-mission-grid {
  display: grid;
  gap: 40px;
}

.page-about .about-mission-copy {
  max-width: 38rem;
}

.page-about .about-mission-lead {
  font-family: var(--font-headline);
  font-weight: 800;
  font-size: 22px;
  line-height: 1.5;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.page-about .about-mission-copy p {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.page-about .about-value-list {
  list-style: none;
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--color-line);
}

.page-about .about-value-item {
  display: flex;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-line);
}

.page-about .about-value-num {
  font-family: var(--font-caption);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent);
  min-width: 26px;
  line-height: 1.4;
}

.page-about .about-value-body h3 {
  font-family: var(--font-headline);
  font-size: 17px;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 6px;
}

.page-about .about-value-body p {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

/* ---------- 发展里程碑 ---------- */
.page-about .about-milestone {
  background: var(--color-dark);
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.page-about .about-milestone .section-heading {
  color: #FFFFFF;
}

.page-about .about-milestone .section-index {
  color: var(--color-accent);
}

.page-about .about-milestone .vertical-annotation {
  color: rgba(255, 255, 255, 0.55);
}

.page-about .about-milestone-layout {
  display: grid;
  gap: 40px;
}

.page-about .about-timeline {
  position: relative;
  padding-left: 28px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: rgba(255, 255, 255, 0.14);
}

.page-about .about-timeline-item {
  position: relative;
  padding-bottom: 28px;
}

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

.page-about .about-timeline-marker {
  position: absolute;
  left: -28px;
  top: 8px;
  width: 14px;
  height: 14px;
  background: var(--color-accent);
  outline: 3px solid rgba(255, 107, 53, 0.25);
  border-radius: 2px;
}

.page-about .about-timeline-card {
  background: rgba(255, 255, 255, 0.04);
  border-left: 3px solid var(--color-primary);
  padding: 18px 18px 16px;
  transition: background 0.3s ease;
}

.page-about .about-timeline-card:hover {
  background: rgba(255, 255, 255, 0.07);
}

.page-about .about-timeline-period {
  display: inline-block;
  font-family: var(--font-caption);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 8px;
}

.page-about .about-timeline-card h3 {
  font-family: var(--font-headline);
  color: #FFFFFF;
  font-size: 17px;
  font-weight: 800;
  margin-bottom: 8px;
}

.page-about .about-timeline-card p {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.72);
  margin-bottom: 8px;
}

.page-about .about-timeline-card p:last-child {
  margin-bottom: 0;
}

.page-about .about-timeline-detail {
  font-family: var(--font-caption);
  font-size: 12px;
  line-height: 1.55;
  color: rgba(255, 255, 255, 0.55);
  margin-top: 10px;
  padding-left: 12px;
  border-left: 1px solid var(--color-accent);
}

/* ---------- 里程碑侧栏 ---------- */
.page-about .about-milestone-aside {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-about .about-growth-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 8px;
}

.page-about .about-growth-card img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-growth-caption {
  font-family: var(--font-caption);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.55);
  padding: 10px 8px 4px;
  text-align: right;
}

.page-about .about-growth-status {
  background: var(--color-primary);
  padding: 18px 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
}

.page-about .about-growth-label {
  font-family: var(--font-caption);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.85);
  flex-basis: 100%;
}

.page-about .about-growth-status strong {
  font-family: var(--font-headline);
  font-size: 28px;
  font-weight: 900;
  color: #FFFFFF;
}

.page-about .about-growth-status em {
  font-family: var(--font-body);
  font-style: normal;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.8);
}

/* ---------- 数据与内容流程 ---------- */
.page-about .about-process {
  position: relative;
}

.page-about .about-process::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: repeating-linear-gradient(90deg, var(--color-primary) 0 12px, var(--color-accent) 12px 24px);
}

.page-about .about-process-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-process-step {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-left: 4px solid var(--color-accent);
}

.page-about .about-step-num {
  font-family: var(--font-caption);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.2;
  min-width: 32px;
}

.page-about .about-step-body h3 {
  font-family: var(--font-headline);
  font-size: 18px;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 8px;
}

.page-about .about-step-body p {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.page-about .about-process-note {
  margin-top: 24px;
}

/* ---------- 团队与资质 ---------- */
.page-about .about-team {
  border-bottom: 1px solid var(--color-line);
}

.page-about .about-team-layout {
  display: grid;
  gap: 32px;
}

.page-about .about-team-figure {
  border: 1px solid var(--color-line);
  overflow: hidden;
}

.page-about .about-team-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-team-content {
  display: grid;
  gap: 8px;
  align-content: start;
}

.page-about .about-team-block {
  padding: 20px 0;
  border-bottom: 1px solid var(--color-line);
}

.page-about .about-team-block:last-child {
  border-bottom: none;
}

.page-about .about-team-block h3 {
  font-family: var(--font-headline);
  font-size: 18px;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 8px;
  position: relative;
  padding-left: 12px;
}

.page-about .about-team-block h3::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 3px;
  background: var(--color-primary);
}

.page-about .about-team-block p {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-secondary);
}

/* ---------- 继续探索 ---------- */
.page-about .about-more {
  padding-top: 0;
}

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

.page-about .about-more-card {
  display: block;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  padding: 28px 24px;
  text-decoration: none;
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.page-about .about-more-card:hover {
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
}

.page-about .about-more-tag {
  display: inline-block;
  font-family: var(--font-caption);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  border: 1px solid rgba(255, 107, 53, 0.4);
  padding: 3px 8px;
  margin-bottom: 14px;
}

.page-about .about-more-card h3 {
  font-family: var(--font-headline);
  font-size: 18px;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 8px;
}

.page-about .about-more-card p {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

/* ---------- 桌面断点 ---------- */
@media (min-width: 768px) {
  .page-about .about-hero-grid {
    grid-template-columns: 1.08fr 0.92fr;
    align-items: center;
    gap: 48px;
  }

  .page-about .about-mission-grid {
    grid-template-columns: 1.2fr 1fr;
    gap: 56px;
  }

  .page-about .about-milestone-layout {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 48px;
  }

  .page-about .about-team-layout {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .about-more-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
}

@media (min-width: 992px) {
  .page-about .about-process-steps {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0;
    border: 1px solid var(--color-line);
    background: var(--color-surface);
  }

  .page-about .about-process-step {
    display: block;
    padding: 28px 22px;
    border: none;
    border-right: 1px solid var(--color-line);
    transition: background 0.3s ease;
  }

  .page-about .about-process-step:last-child {
    border-right: none;
  }

  .page-about .about-process-step:hover {
    background: #F0F4F6;
  }

  .page-about .about-step-num {
    display: block;
    margin-bottom: 12px;
  }
}

/* ---------- 支持 hover 的桌面设备：时间轴细节展开 ---------- */
@media (hover: hover) and (min-width: 768px) {
  .page-about .about-timeline-detail {
    max-height: 0;
    opacity: 0;
    margin-top: 0;
    padding-top: 0;
    padding-bottom: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, opacity 0.35s ease, margin-top 0.35s ease, padding-top 0.35s ease, padding-bottom 0.35s ease;
  }

  .page-about .about-timeline-card:hover .about-timeline-detail {
    max-height: 120px;
    opacity: 1;
    margin-top: 10px;
    padding-top: 6px;
    padding-bottom: 2px;
  }
}