/* ===== 页面专属样式：about / 品牌概况 ===== */

.page-about {
  background: var(--bg-primary);
  color: var(--text-primary);
}

/* 区块纵向节奏 */
.page-about .about-mission,
.page-about .about-timeline,
.page-about .about-data,
.page-about .about-credentials,
.page-about .about-stats {
  padding-top: 56px;
  padding-bottom: 56px;
}

.page-about .about-section-head {
  margin-bottom: 32px;
}

.page-about .about-section-tag {
  margin: 10px 0 6px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-section-head h2 {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(24px, 4.5vw, 38px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

/* ---- 首屏专题封面 ---- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 40px 0 64px;
  background:
    linear-gradient(180deg, rgba(8, 20, 38, 0.88), rgba(11, 30, 58, 0.96)),
    linear-gradient(rgba(45, 79, 124, 0.15) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45, 79, 124, 0.15) 1px, transparent 1px);
  background-size: auto, 52px 52px, 52px 52px;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -120px;
  top: -120px;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, rgba(212, 175, 55, 0.16), transparent 70%);
  pointer-events: none;
}

.page-about .about-hero-breadcrumbs {
  margin-bottom: 40px;
}

.page-about .about-hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 16px;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-hero-kicker::before {
  content: "";
  width: 10px;
  height: 10px;
  background: var(--gold-light);
  transform: rotate(45deg);
  box-shadow: 0 0 14px rgba(245, 208, 97, 0.6);
}

.page-about .about-hero h1 {
  margin: 0 0 20px;
  max-width: 14em;
  font-family: var(--font-head);
  font-size: clamp(30px, 6.5vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.page-about .about-hero-lead {
  max-width: 44em;
  margin: 0 0 28px;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-secondary);
}

.page-about .about-hero-meta {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  max-width: 460px;
  margin: 0;
}

.page-about .about-hero-meta-item {
  padding: 12px 14px;
  background: rgba(18, 42, 74, 0.72);
  border-left: 2px solid var(--gold);
}

.page-about .about-hero-meta-item dt {
  margin: 0 0 4px;
  font-family: var(--font-body);
  font-size: 12px;
  color: var(--text-secondary);
}

.page-about .about-hero-meta-item dd {
  margin: 0;
  font-family: var(--font-data);
  font-size: 14px;
  color: var(--text-primary);
}

.page-about .about-hero-index {
  margin-top: 32px;
  padding: 22px 24px;
  background: rgba(18, 42, 74, 0.5);
  border-left: 3px solid var(--gold);
}

.page-about .about-hero-index-title {
  margin: 0 0 12px;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-hero-index ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 22px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero-index a {
  font-family: var(--font-data);
  font-size: 14px;
  color: var(--text-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-about .about-hero-index a:hover {
  color: var(--gold-light);
}

/* ---- 品牌使命 ---- */
.page-about .about-mission {
  background: linear-gradient(180deg, var(--bg-primary), rgba(18, 42, 74, 0.35));
}

.page-about .about-mission-grid {
  display: grid;
  gap: 28px;
}

.page-about .about-mission-copy p {
  margin: 0 0 16px;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-secondary);
}

.page-about .about-mission-list h3 {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-size: 17px;
  color: var(--text-primary);
}

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

.page-about .about-mission-list li {
  position: relative;
  padding: 8px 0 8px 22px;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
  border-bottom: 1px solid rgba(45, 79, 124, 0.28);
}

.page-about .about-mission-list li:last-child {
  border-bottom: 0;
}

.page-about .about-mission-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  width: 9px;
  height: 9px;
  border: 2px solid var(--gold);
  transform: rotate(45deg);
}

/* ---- 关键数字 ---- */
.page-about .about-stats {
  background:
    radial-gradient(circle at 78% 18%, rgba(212, 175, 55, 0.13), transparent 32%),
    var(--bg-deep);
}

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

.page-about .about-stats-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-stat-card {
  position: relative;
  padding: 22px 16px 18px;
  background: rgba(18, 42, 74, 0.55);
  border-top: 2px solid var(--gold);
  overflow: hidden;
}

.page-about .about-stat-card::after {
  content: "";
  position: absolute;
  right: -26px;
  top: -26px;
  width: 88px;
  height: 88px;
  background: radial-gradient(circle, rgba(245, 208, 97, 0.16), transparent 70%);
  pointer-events: none;
}

.page-about .about-stat-num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-data);
  font-size: clamp(28px, 5.5vw, 42px);
  line-height: 1.05;
  color: var(--gold-light);
  text-shadow: 0 0 24px rgba(245, 208, 97, 0.28);
}

.page-about .about-stat-label {
  display: block;
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-secondary);
}

.page-about .about-stats-note {
  margin: 18px 0 0;
  padding: 12px 16px;
  background: rgba(11, 30, 58, 0.46);
  border-left: 2px solid var(--line-color);
  font-size: 13px;
  color: var(--text-secondary);
}

.page-about .about-stats-figure,
.page-about .about-data-figure,
.page-about .about-cred-figure {
  margin: 0;
}

.page-about .about-stats-figure .img-holder,
.page-about .about-data-figure .img-holder,
.page-about .about-cred-figure .img-holder {
  border: 1px solid var(--line-color);
}

.page-about .about-stats-figure figcaption,
.page-about .about-data-figure figcaption,
.page-about .about-cred-figure figcaption {
  margin-top: 12px;
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-secondary);
}

/* ---- 发展里程碑 ---- */
.page-about .about-timeline {
  background: linear-gradient(180deg, var(--bg-primary) 0%, rgba(8, 20, 38, 0.6) 100%);
}

.page-about .about-timeline-track {
  max-width: 820px;
}

.page-about .about-milestones {
  position: relative;
  margin: 0;
  padding: 0 0 0 48px;
  list-style: none;
}

.page-about .about-milestones::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--line-color) 55%, rgba(18, 42, 74, 0) 100%);
}

.page-about .about-milestone {
  position: relative;
  padding-bottom: 36px;
}

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

.page-about .about-milestone-marker {
  position: absolute;
  left: -48px;
  top: 0;
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--gold);
  border-radius: 50%;
  background: var(--bg-primary);
  box-shadow: 0 0 0 5px rgba(212, 175, 55, 0.12), 0 0 18px rgba(212, 175, 55, 0.18);
}

.page-about .about-milestone-year {
  font-family: var(--font-data);
  font-size: 11px;
  font-weight: 700;
  color: var(--gold);
}

.page-about .about-milestone-body {
  padding: 18px 20px 20px;
  background: rgba(18, 42, 74, 0.44);
  border-left: 3px solid var(--gold);
  transition: background 0.25s ease, transform 0.25s ease;
}

.page-about .about-milestone-body:hover {
  background: rgba(18, 42, 74, 0.7);
  transform: translateX(4px);
}

.page-about .about-milestone-body h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 18px;
  color: var(--text-primary);
}

.page-about .about-milestone-body p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-secondary);
}

/* ---- 数据覆盖与团队分工 ---- */
.page-about .about-data {
  background: var(--bg-secondary);
}

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

.page-about .about-data-lead {
  margin: 0 0 20px;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.page-about .about-data-list {
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
}

.page-about .about-data-list li {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(45, 79, 124, 0.4);
}

.page-about .about-data-list li strong {
  font-family: var(--font-data);
  font-size: 14px;
  color: var(--gold);
}

.page-about .about-data-list li span {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-secondary);
}

/* ---- 资质与认证 ---- */
.page-about .about-credentials {
  background: var(--bg-primary);
}

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

.page-about .about-cred-list {
  display: grid;
  gap: 12px;
}

.page-about .about-cred-item {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 4px 16px;
  padding: 16px 18px;
  background: rgba(18, 42, 74, 0.46);
}

.page-about .about-cred-item p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-primary);
}

.page-about .about-cred-item .data-note {
  font-size: 13px;
  color: var(--gold-light);
}

/* ---- 底部上下文入口 ---- */
.page-about .about-cta {
  padding-top: 64px;
  padding-bottom: 72px;
  background:
    linear-gradient(135deg, rgba(212, 175, 55, 0.1), transparent 52%),
    var(--bg-deep);
}

.page-about .about-cta-inner {
  display: grid;
  gap: 16px;
  justify-items: start;
}

.page-about .about-cta-kicker {
  margin: 0;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-cta h2 {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(24px, 4.5vw, 36px);
  color: var(--text-primary);
}

.page-about .about-cta-lead {
  margin: 0;
  max-width: 44em;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 10px;
}

/* ---- 平板：hero 数据项三列 ---- */
@media (min-width: 720px) {
  .page-about .about-hero-meta {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---- 桌面布局 ---- */
@media (min-width: 900px) {
  .page-about .about-hero {
    padding-top: 64px;
    padding-bottom: 96px;
  }

  .page-about .about-hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.85fr);
    gap: 56px;
    align-items: end;
  }

  .page-about .about-hero-index {
    margin-top: 0;
  }

  .page-about .about-mission,
  .page-about .about-timeline,
  .page-about .about-data,
  .page-about .about-credentials,
  .page-about .about-stats {
    padding-top: 88px;
    padding-bottom: 88px;
  }

  .page-about .about-mission-grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.9fr);
    gap: 48px;
  }

  .page-about .about-stats-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: 56px;
  }

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

  .page-about .about-timeline-track {
    margin-left: 40px;
  }

  .page-about .about-milestones {
    padding-left: 56px;
  }

  .page-about .about-milestones::before {
    left: 22px;
    width: 3px;
  }

  .page-about .about-milestone-marker {
    left: -56px;
    width: 44px;
    height: 44px;
  }

  .page-about .about-milestone-year {
    font-size: 12px;
  }

  .page-about .about-milestone-body {
    padding: 20px 26px 22px;
  }

  .page-about .about-milestone-body:hover {
    transform: translateX(6px);
  }

  .page-about .about-data-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 56px;
  }

  .page-about .about-cred-grid {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    gap: 56px;
  }

  .page-about .about-cta {
    padding-top: 80px;
    padding-bottom: 96px;
  }
}