.page-about {
  --about-red: #E63946;
  --about-blue: #1D3557;
  --about-gold: #F4A261;
  --about-green: #2A9D8F;
  --about-dark: #2B2D42;
  --about-light: #F8F9FA;
  --about-white: #FFFFFF;
  --about-yellow: #E9C46A;
  --about-radius-lg: 24px;
  --about-radius-card: 16px;
  --about-radius-sm: 8px;
  --about-font-heading: "Oswald", "Bebas Neue", sans-serif;
  --about-font-body: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --about-font-data: "Fira Code", "Consolas", monospace;
  --about-container-max: 1200px;
  --about-shadow-card: 0 4px 16px rgba(0,0,0,0.06);
  --about-shadow-hover: 0 12px 32px rgba(0,0,0,0.10);
  --about-transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ---- 基础布局 ---- */
.page-about .container {
  max-width: var(--about-container-max);
  margin: 0 auto;
  padding: 0 20px;
  width: 100%;
  box-sizing: border-box;
}

.page-about .breadcrumb {
  max-width: var(--about-container-max);
  margin: 16px auto 0;
  padding: 0 20px;
  font-family: var(--about-font-data);
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  color: var(--about-dark);
  opacity: 0.65;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about .crumb-item {
  display: inline-flex;
  align-items: center;
}

.page-about .crumb-link {
  color: var(--about-blue);
  text-decoration: none;
  transition: color var(--about-transition);
}

.page-about .crumb-link:hover {
  color: var(--about-red);
}

.page-about .crumb-sep {
  color: var(--about-dark);
  opacity: 0.35;
  font-family: var(--about-font-data);
}

.page-about .crumb-current {
  color: var(--about-dark);
  font-weight: 500;
}

/* ---- 标题区 ---- */
.page-about .about-header {
  padding: 40px 0 20px;
  position: relative;
  overflow: hidden;
}

.page-about .header-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: center;
}

.page-about .header-text {
  position: relative;
  z-index: 2;
}

.page-about .header-title {
  font-family: var(--about-font-heading);
  font-size: 3.2rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--about-blue);
  margin: 0 0 8px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.page-about .header-subtitle {
  font-family: var(--about-font-body);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--about-red);
  margin: 0 0 12px;
  letter-spacing: 0.04em;
}

.page-about .header-desc {
  font-family: var(--about-font-body);
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--about-dark);
  max-width: 640px;
  margin: 0;
  opacity: 0.8;
}

.page-about .header-visual {
  position: relative;
  z-index: 1;
  border-radius: var(--about-radius-lg);
  overflow: hidden;
  box-shadow: var(--about-shadow-card);
  aspect-ratio: 1200 / 400;
  background: var(--about-blue);
}

.page-about .header-bg-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.page-about .header-divider {
  margin: 32px auto 0;
  max-width: var(--about-container-max);
  width: calc(100% - 40px);
  height: 3px;
  background: linear-gradient(90deg, var(--about-red) 0%, var(--about-gold) 50%, var(--about-blue) 100%);
  border-radius: 4px;
}

/* ---- 使命区 ---- */
.page-about .mission-section {
  padding: 60px 0 50px;
  background: var(--about-light);
  position: relative;
}

.page-about .mission-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.page-about .mission-badge {
  display: inline-block;
  font-family: var(--about-font-data);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--about-white);
  background: var(--about-red);
  padding: 4px 16px;
  border-radius: 50px;
  margin-bottom: 16px;
  text-transform: uppercase;
}

.page-about .section-title {
  font-family: var(--about-font-heading);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--about-blue);
  margin: 0 0 8px;
  letter-spacing: 0.02em;
}

.page-about .section-subtitle {
  font-family: var(--about-font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--about-dark);
  opacity: 0.75;
  max-width: 680px;
  margin: 0 auto 40px;
  text-align: center;
}

.page-about .section-label {
  font-family: var(--about-font-data);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--about-red);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.page-about .mission-content {
  max-width: 720px;
  margin: 20px auto 0;
}

.page-about .mission-quote {
  font-family: var(--about-font-body);
  font-size: 1.35rem;
  font-weight: 400;
  line-height: 1.7;
  color: var(--about-blue);
  margin: 0 0 20px;
  padding: 0 20px;
  border-left: 4px solid var(--about-red);
  text-align: left;
  position: relative;
}

.page-about .quote-mark {
  font-family: var(--about-font-heading);
  font-size: 2.8rem;
  color: var(--about-red);
  opacity: 0.3;
  line-height: 0;
  vertical-align: -0.3em;
  display: inline-block;
  margin: 0 2px;
}

.page-about .mission-body {
  font-family: var(--about-font-body);
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--about-dark);
  opacity: 0.8;
  margin: 0;
  text-align: left;
}

.page-about .mission-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: center;
  margin: 36px auto 0;
  padding-top: 32px;
  border-top: 1px solid rgba(0,0,0,0.06);
  width: 100%;
  max-width: 680px;
}

.page-about .stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 100px;
}

.page-about .stat-value {
  font-family: var(--about-font-data);
  font-size: 2rem;
  font-weight: 600;
  color: var(--about-red);
  line-height: 1.2;
}

.page-about .stat-label {
  font-family: var(--about-font-body);
  font-size: 0.8rem;
  color: var(--about-dark);
  opacity: 0.6;
  margin-top: 4px;
}

/* ---- 服务特色区 ---- */
.page-about .features-section {
  padding: 60px 0 50px;
  background: var(--about-white);
}

.page-about .features-section .section-label {
  text-align: center;
}

.page-about .features-section .section-title {
  text-align: center;
}

.page-about .features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  margin: 36px 0 32px;
}

.page-about .feature-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  background: var(--about-light);
  border-radius: var(--about-radius-card);
  padding: 28px 24px;
  box-shadow: var(--about-shadow-card);
  transition: transform var(--about-transition), box-shadow var(--about-transition);
  position: relative;
  overflow: hidden;
}

.page-about .feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--about-shadow-hover);
}

.page-about .feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  border-radius: var(--about-radius-card) var(--about-radius-card) 0 0;
}

.page-about .card-red::before { background: var(--about-red); }
.page-about .card-gold::before { background: var(--about-gold); }
.page-about .card-green::before { background: var(--about-green); }

.page-about .card-index {
  font-family: var(--about-font-heading);
  font-size: 2.6rem;
  font-weight: 700;
  color: var(--about-blue);
  opacity: 0.08;
  line-height: 1;
  position: absolute;
  top: 12px;
  right: 18px;
  user-select: none;
}

.page-about .card-content {
  position: relative;
  z-index: 1;
}

.page-about .card-title {
  font-family: var(--about-font-heading);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--about-blue);
  margin: 0 0 8px;
}

.page-about .card-desc {
  font-family: var(--about-font-body);
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--about-dark);
  opacity: 0.75;
  margin: 0 0 14px;
  max-width: 480px;
}

.page-about .card-data {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .data-tag {
  font-family: var(--about-font-data);
  font-size: 0.7rem;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: 50px;
  background: var(--about-white);
  color: var(--about-dark);
  letter-spacing: 0.04em;
  border: 1px solid rgba(0,0,0,0.08);
}

.page-about .tag-red { border-color: var(--about-red); color: var(--about-red); }
.page-about .tag-yellow { border-color: var(--about-yellow); color: #b8943e; }
.page-about .tag-total { border-color: var(--about-blue); color: var(--about-blue); }
.page-about .tag-lineup { border-color: var(--about-gold); color: #c4813e; }
.page-about .tag-sub { border-color: var(--about-green); color: var(--about-green); }
.page-about .tag-form { border-color: var(--about-blue); color: var(--about-blue); }
.page-about .tag-filter { border-color: var(--about-dark); color: var(--about-dark); opacity: 0.7; }

.page-about .card-visual {
  border-radius: var(--about-radius-sm);
  overflow: hidden;
  aspect-ratio: 400 / 200;
  background: var(--about-blue);
}

.page-about .card-visual img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.page-about .features-cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  margin-top: 12px;
  padding-top: 28px;
  border-top: 1px solid rgba(0,0,0,0.04);
}

.page-about .cta-hint {
  font-family: var(--about-font-body);
  font-size: 0.85rem;
  color: var(--about-dark);
  opacity: 0.6;
  margin: 0;
  text-align: center;
}

.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--about-font-body);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 10px 28px;
  border-radius: 50px;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--about-transition), color var(--about-transition), transform var(--about-transition);
  border: 2px solid transparent;
}

.page-about .btn-outline {
  background: transparent;
  border-color: var(--about-blue);
  color: var(--about-blue);
}

.page-about .btn-outline:hover {
  background: var(--about-blue);
  color: var(--about-white);
  transform: scale(1.02);
}

.page-about .btn-primary {
  background: var(--about-red);
  border-color: var(--about-red);
  color: var(--about-white);
}

.page-about .btn-primary:hover {
  background: var(--about-blue);
  border-color: var(--about-blue);
  transform: scale(1.02);
}

/* ---- 区域优化区 ---- */
.page-about .region-section {
  padding: 60px 0 50px;
  background: var(--about-light);
}

.page-about .region-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}

.page-about .region-text .section-label {
  margin-bottom: 6px;
}

.page-about .region-text .section-title {
  margin-bottom: 16px;
}

.page-about .region-body {
  font-family: var(--about-font-body);
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--about-dark);
  opacity: 0.8;
  margin: 0 0 24px;
  max-width: 600px;
}

.page-about .region-icp-block {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: var(--about-white);
  padding: 10px 20px;
  border-radius: 50px;
  box-shadow: var(--about-shadow-card);
  margin-bottom: 20px;
}

.page-about .icp-badge {
  font-family: var(--about-font-data);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--about-white);
  background: var(--about-blue);
  padding: 3px 12px;
  border-radius: 50px;
  text-transform: uppercase;
}

.page-about .icp-value {
  font-family: var(--about-font-data);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--about-dark);
}

.page-about .region-contact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 8px;
}

.page-about .contact-line {
  font-family: var(--about-font-body);
  font-size: 0.85rem;
  color: var(--about-dark);
  opacity: 0.7;
}

.page-about .region-visual {
  border-radius: var(--about-radius-lg);
  overflow: hidden;
  box-shadow: var(--about-shadow-card);
  aspect-ratio: 800 / 300;
  background: var(--about-blue);
}

.page-about .region-visual img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

/* ---- 联系引导区 ---- */
.page-about .connect-section {
  padding: 50px 0 60px;
  background: var(--about-blue);
}

.page-about .connect-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 24px;
}

.page-about .connect-title {
  font-family: var(--about-font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--about-white);
  margin: 0;
  letter-spacing: 0.02em;
}

.page-about .connect-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}

.page-about .connect-links .btn {
  min-width: 150px;
}

.page-about .connect-links .btn-primary {
  background: var(--about-white);
  border-color: var(--about-white);
  color: var(--about-blue);
}

.page-about .connect-links .btn-primary:hover {
  background: var(--about-gold);
  border-color: var(--about-gold);
  color: var(--about-dark);
}

/* ---- 响应式 ---- */
@media (max-width: 599px) {
  .page-about .header-title {
    font-size: 2.4rem;
  }

  .page-about .header-subtitle {
    font-size: 0.9rem;
  }

  .page-about .header-desc {
    font-size: 0.88rem;
  }

  .page-about .header-visual {
    aspect-ratio: 600 / 300;
  }

  .page-about .section-title {
    font-size: 1.7rem;
  }

  .page-about .mission-quote {
    font-size: 1.1rem;
    padding: 0 12px;
  }

  .page-about .mission-stats {
    gap: 16px;
  }

  .page-about .stat-value {
    font-size: 1.5rem;
  }

  .page-about .features-grid {
    gap: 20px;
  }

  .page-about .feature-card {
    padding: 20px 16px;
  }

  .page-about .card-index {
    font-size: 2rem;
    top: 8px;
    right: 12px;
  }

  .page-about .card-title {
    font-size: 1.1rem;
  }

  .page-about .card-visual {
    aspect-ratio: 360 / 180;
  }

  .page-about .region-layout {
    gap: 24px;
  }

  .page-about .region-section {
    padding: 40px 0 36px;
  }

  .page-about .region-icp-block {
    flex-wrap: wrap;
    padding: 8px 16px;
  }

  .page-about .connect-title {
    font-size: 1.4rem;
  }

  .page-about .connect-links .btn {
    min-width: 130px;
    font-size: 0.85rem;
    padding: 8px 20px;
  }
}

@media (min-width: 600px) and (max-width: 899px) {
  .page-about .header-title {
    font-size: 2.8rem;
  }

  .page-about .header-layout {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .header-visual {
    aspect-ratio: 600 / 300;
  }

  .page-about .features-grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .feature-card:last-child {
    grid-column: 1 / -1;
    max-width: 500px;
    justify-self: center;
  }

  .page-about .region-layout {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .mission-stats {
    gap: 20px;
  }
}

@media (min-width: 900px) {
  .page-about .header-layout {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .header-title {
    font-size: 3.6rem;
  }

  .page-about .header-visual {
    aspect-ratio: 600 / 400;
  }

  .page-about .features-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .page-about .feature-card {
    grid-template-columns: 1fr;
    padding: 32px 28px;
  }

  .page-about .region-layout {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .region-visual {
    aspect-ratio: 700 / 300;
  }
}