.page-about {
  --about-deep: #0A1A30;
  --about-deep-2: #0E2442;
  --about-deep-3: #16305A;
  --about-orange: #FF6B35;
  --about-gold: #D4AF37;
  --about-bright: #3A8DFF;
  --about-ink: #1A1A2E;
  --about-muted: #5A6B7A;
  --about-line: #DDE4EB;
  background: linear-gradient(180deg, var(--bg-light) 0%, #FFFFFF 30%, var(--bg-gray) 100%);
  color: var(--about-ink);
  overflow-x: hidden;
}

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

.page-about .breadcrumb {
  padding: 28px 0 10px;
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--blue-bright);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
}

.page-about .breadcrumb .sep {
  margin: 0 10px;
  color: var(--about-orange);
}

.page-about a:focus-visible {
  outline: 3px solid var(--about-bright);
  outline-offset: 2px;
}

/* ========== 档案页头 ========== */
.page-about .about-hero {
  position: relative;
  margin-top: 12px;
  padding: 56px 0 64px;
  background:
    radial-gradient(ellipse at 85% 10%, rgba(212, 175, 55, 0.16) 0%, transparent 46%),
    linear-gradient(135deg, var(--about-deep) 0%, var(--about-deep-2) 60%, var(--about-deep-3) 100%);
  color: var(--text-light);
  isolation: isolate;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), 0 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 26px;
  height: 54px;
  background: var(--about-orange);
  clip-path: polygon(0 0, 100% 0, 100% 70%, 0 100%);
  z-index: 1;
}

.page-about .about-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  padding: 0 24px;
  max-width: var(--max-w);
  margin: 0 auto;
}

.page-about .about-hero__main {
  max-width: 780px;
}

.page-about .about-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--about-gold);
}

.page-about .about-hero__kicker::before {
  content: "";
  width: 32px;
  height: 3px;
  background: var(--about-orange);
  display: inline-block;
}

.page-about .about-hero h1 {
  margin: 0 0 20px;
  font-family: var(--font-head);
  font-size: clamp(30px, 4.5vw, 48px);
  line-height: 1.18;
  font-style: italic;
  font-weight: 900;
  letter-spacing: 0.01em;
}

.page-about .about-hero__lede {
  margin: 0 0 28px;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.9);
}

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

.page-about .about-hero__aside {
  align-self: end;
  border-left: 3px solid var(--about-orange);
  background: rgba(255, 255, 255, 0.06);
  padding: 20px 20px 18px 24px;
  max-width: 460px;
}

.page-about .about-hero__aside-title {
  margin: 0 0 16px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--about-gold);
}

.page-about .hero-stats {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.page-about .hero-stat dt {
  font-family: var(--font-data);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.65);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.page-about .hero-stat dd {
  margin: 0;
  font-family: var(--font-data);
  font-size: 22px;
  font-weight: 700;
  color: var(--text-light);
}

.page-about .hero-stat dd::after {
  content: "";
  display: block;
  width: 20px;
  height: 2px;
  background: var(--about-orange);
  margin-top: 6px;
}

/* ========== 手册式布局 ========== */
.page-about .manual-wrap {
  background: linear-gradient(180deg, var(--bg-light) 0%, var(--bg-gray) 100%);
  padding-bottom: 80px;
}

.page-about .manual-wrap::before {
  content: "";
  display: block;
  height: 10px;
  width: 100%;
  background: linear-gradient(90deg, var(--about-orange) 0%, var(--about-gold) 60%, var(--about-bright) 100%);
  clip-path: polygon(0 0, 100% 0, calc(100% - 64px) 100%, 0 100%);
}

.page-about .manual-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  padding-top: 8px;
}

.page-about .manual-toc {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin: 0 0 32px;
  border-left: 4px solid var(--about-orange);
  background: rgba(255, 255, 255, 0.85);
  padding: 18px 20px;
}

.page-about .manual-toc__note {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--about-muted);
  text-transform: uppercase;
  margin-bottom: 10px;
}

.page-about .manual-toc__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0;
  text-decoration: none;
  color: var(--about-ink);
  border-bottom: 1px solid var(--about-line);
  font-family: var(--font-body);
  font-weight: 700;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), padding-left 0.25s var(--ease);
}

.page-about .manual-toc__link:last-of-type {
  border-bottom: none;
}

.page-about .manual-toc__no {
  font-family: var(--font-data);
  color: var(--about-orange);
  font-size: 13px;
}

.page-about .manual-toc__label {
  font-size: 15px;
}

.page-about .manual-toc__aside {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px dashed var(--about-line);
  text-align: right;
}

.page-about .manual-toc__aside .annotation {
  color: var(--about-muted);
}

.page-about .manual-main {
  min-width: 0;
}

.page-about .manual-section {
  padding: 48px 0 16px;
  border-top: 1px solid var(--about-line);
  margin-top: 20px;
}

.page-about .manual-section::before {
  content: "";
  display: block;
  width: 52px;
  height: 6px;
  background: linear-gradient(90deg, var(--about-orange), var(--about-gold));
  transform: skewX(-20deg);
  margin-bottom: 18px;
}

.page-about .manual-section:first-child {
  border-top: none;
  margin-top: 0;
}

.page-about .section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 12px;
  margin-bottom: 28px;
  border-bottom: 2px solid var(--about-deep);
  padding-bottom: 12px;
}

.page-about .section-head h2 {
  margin: 0;
  font-family: var(--font-head);
  font-size: 28px;
  line-height: 1.2;
  font-style: italic;
  font-weight: 900;
  color: var(--about-deep);
}

.page-about .section-note {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--about-orange);
  text-align: right;
  white-space: nowrap;
}

/* ========== 品牌故事 ========== */
.page-about .story-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .story-copy p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--about-ink);
}

.page-about .story-lead {
  font-family: var(--font-head);
  font-style: italic;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--about-deep);
}

.page-about .story-note {
  font-family: var(--font-data);
  font-size: 14px;
  color: var(--about-muted);
  border-left: 3px solid var(--about-gold);
  padding-left: 14px;
}

.page-about .pipeline {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .pipeline li {
  font-family: var(--font-data);
  font-size: 13px;
  background: var(--bg-gray);
  color: var(--about-deep);
  padding: 6px 14px;
  clip-path: polygon(0 0, calc(100% - 6px) 0, 100% 100%, 6px 100%);
}

.page-about .story-media {
  position: relative;
}

.page-about .story-media img,
.page-about .team-media img,
.page-about .timeline-banner {
  display: block;
  max-width: 100%;
  height: auto;
  width: 100%;
  object-fit: cover;
}

.page-about .story-media img {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), 6px 100%);
}

.page-about .story-media .annotation {
  position: absolute;
  right: 10px;
  bottom: 18px;
  background: rgba(10, 26, 48, 0.7);
  color: var(--text-light);
  font-size: 11px;
  letter-spacing: 0.1em;
  padding: 4px 8px;
  writing-mode: horizontal-tb;
}

/* ========== 里程碑时间轴 ========== */
.page-about .timeline {
  position: relative;
  margin: 0 0 28px;
  padding-left: 32px;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 8px;
  bottom: 16px;
  width: 2px;
  background: linear-gradient(180deg, var(--about-orange) 0%, var(--about-gold) 30%, var(--about-bright) 70%, var(--data-green) 100%);
}

.page-about .timeline-item {
  position: relative;
  padding: 0 0 36px;
}

.page-about .timeline-item:last-child {
  padding-bottom: 4px;
}

.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 24px;
  width: 14px;
  height: 14px;
  background: var(--text-light);
  border: 3px solid var(--about-orange);
  transform: rotate(45deg);
  z-index: 1;
}

.page-about .timeline-year {
  display: inline-block;
  background: var(--about-deep);
  color: var(--text-light);
  font-family: var(--font-data);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 8px 18px;
  margin-bottom: 12px;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 100%, 10px 100%);
  transition: background 0.25s var(--ease);
}

.page-about .timeline-card {
  background: rgba(255, 255, 255, 0.9);
  padding: 20px 22px;
  border-left: 4px solid var(--about-gold);
  box-shadow: 0 2px 14px rgba(10, 26, 48, 0.06);
  transition: transform 0.25s var(--ease), background 0.25s var(--ease);
}

.page-about .timeline-card h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-style: italic;
  font-weight: 900;
  font-size: 20px;
  color: var(--about-deep);
}

.page-about .timeline-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--about-muted);
}

.page-about .timeline-banner {
  margin-top: 8px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), 16px 100%);
}

/* ========== 团队与资质 ========== */
.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .team-cards {
  display: grid;
  gap: 20px;
}

.page-about .team-cards .panel {
  background: #FFFFFF;
}

.page-about .team-cards h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-style: italic;
  font-weight: 900;
  font-size: 18px;
  color: var(--about-deep);
}

.page-about .team-cards p,
.page-about .cert-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--about-muted);
}

.page-about .team-media img {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), 8px 100%);
}

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

.page-about .cert-item {
  background: var(--bg-light);
  border-left: 3px solid var(--about-orange);
  padding: 20px 22px;
}

.page-about .cert-item h3 {
  margin: 10px 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--about-deep);
}

.page-about .cert-item .tag {
  display: inline-block;
}

/* ========== 平台理念 ========== */
.page-about .values-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  margin-bottom: 32px;
}

.page-about .value-card {
  position: relative;
  background: linear-gradient(145deg, var(--about-deep) 0%, var(--about-deep-2) 100%);
  color: var(--text-light);
  padding: 32px 26px 28px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), 14px 100%);
}

.page-about .value-card::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 5px;
  background: linear-gradient(180deg, var(--about-orange), var(--about-gold));
}

.page-about .value-no {
  display: block;
  font-family: var(--font-data);
  font-size: 14px;
  color: var(--about-gold);
  margin-bottom: 14px;
  letter-spacing: 0.08em;
}

.page-about .value-card h3 {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-style: italic;
  font-weight: 900;
  font-size: 26px;
}

.page-about .value-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.85);
}

.page-about .values-links {
  background: var(--bg-light);
  border-top: 3px solid var(--about-orange);
  padding: 18px 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
}

.page-about .values-links p {
  margin: 0;
  width: 100%;
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--about-muted);
}

.page-about .values-links a {
  color: var(--about-deep);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 2px solid var(--about-gold);
  padding-bottom: 2px;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .values-links a:hover {
  color: var(--about-orange);
  border-color: var(--about-orange);
}

/* ========== 桌面端增强 ========== */
@media (min-width: 768px) {
  .page-about .container {
    padding: 0 32px;
  }

  .page-about .about-hero {
    padding: 68px 0 76px;
  }

  .page-about .about-hero__inner {
    padding: 0 32px;
  }

  .page-about .section-head h2 {
    font-size: 32px;
  }

  .page-about .story-lead {
    font-size: 20px;
  }

  .page-about .team-cards {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .page-about .values-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .page-about .values-links {
    flex-wrap: nowrap;
  }

  .page-about .values-links p {
    width: auto;
    margin-right: auto;
  }
}

@media (min-width: 992px) {
  .page-about .about-hero__inner {
    grid-template-columns: 1.2fr 0.8fr;
    align-items: end;
    gap: 48px;
  }

  .page-about .about-hero__aside {
    margin-bottom: 8px;
  }

  .page-about .manual-layout {
    grid-template-columns: 260px 1fr;
    gap: 56px;
    padding-top: 24px;
  }

  .page-about .manual-toc {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    height: fit-content;
    margin: 0;
    padding: 24px 22px;
  }

  .page-about .manual-toc__link:hover {
    color: var(--about-orange);
    border-color: var(--about-orange);
    padding-left: 6px;
  }

  .page-about .manual-section {
    padding: 64px 0 32px;
    margin-top: 24px;
  }

  .page-about .story-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: center;
  }

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

  .page-about .timeline::before {
    left: 14px;
  }

  .page-about .timeline-item::before {
    left: -32px;
  }

  .page-about .timeline-card {
    margin-left: 8px;
  }

  .page-about .timeline-item:hover .timeline-year {
    background: var(--about-orange);
  }

  .page-about .timeline-item:hover .timeline-card {
    transform: translateX(6px);
    background: #FFFFFF;
  }

  .page-about .team-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .page-about .team-cards {
    grid-column: 1 / -1;
  }

  .page-about .cert-list {
    gap: 20px;
  }

  .page-about .team-media img {
    height: 100%;
    max-height: 420px;
  }
}