.page-about {
  --about-grid-line: rgba(0, 169, 206, 0.06);
  --about-deep: #0B1F3A;
  background: #fff;
  overflow-x: hidden;
}

.page-about .container {
  max-width: 1120px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
  width: 100%;
  box-sizing: border-box;
}

.page-about .breadcrumb {
  margin: 0 0 32px;
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 6px;
  font-size: 13px;
  color: rgba(238, 242, 247, 0.72);
}

.page-about .breadcrumb a {
  color: #00A9CE;
  text-decoration: none;
}

.page-about .breadcrumb a:hover {
  text-decoration: underline;
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 6px;
  color: rgba(238, 242, 247, 0.36);
}

.page-about .breadcrumb li[aria-current="page"] {
  color: #c5d1dc;
}

.page-about .about-hero {
  background:
    linear-gradient(rgba(0, 169, 206, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 169, 206, 0.04) 1px, transparent 1px),
    linear-gradient(140deg, #0B1F3A 0%, #0e2c4f 70%, #123557 100%);
  background-size: 28px 28px, 28px 28px, auto;
  padding: 48px 0 56px;
  color: #fff;
}

.page-about .about-hero__layout {
  display: grid;
  gap: 36px;
}

.page-about .about-hero__kicker {
  font-size: 13px;
  letter-spacing: 0.18em;
  color: #00A9CE;
  margin: 0 0 12px;
}

.page-about .about-hero h1 {
  margin: 0 0 16px;
  font-family: Impact, "Noto Sans SC Black", "PingFang SC Semibold", sans-serif;
  font-size: 44px;
  line-height: 1.08;
  color: #fff;
  letter-spacing: 0.01em;
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 620px;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(238, 242, 247, 0.88);
}

.page-about .about-hero__stats {
  margin: 0;
  padding: 24px 0 0;
  border-top: 1px solid rgba(208, 217, 226, 0.22);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.page-about .about-hero__stat {
  margin: 0;
}

.page-about .about-hero__stat dt {
  font-size: 13px;
  color: rgba(238, 242, 247, 0.66);
  margin-bottom: 6px;
}

.page-about .about-hero__stat dd {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-about .about-hero__stat-num {
  font-family: "DIN Alternate", Impact, sans-serif;
  font-size: 40px;
  line-height: 1.1;
  color: #FF7A00;
}

.page-about .about-hero__stat-unit {
  font-size: 14px;
  color: rgba(238, 242, 247, 0.78);
}

.page-about .about-hero__index {
  margin-top: 40px;
}

.page-about .about-hero__index ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid rgba(208, 217, 226, 0.22);
}

.page-about .about-hero__index li {
  border-bottom: 1px solid rgba(208, 217, 226, 0.16);
}

.page-about .about-hero__index a {
  display: block;
  padding: 12px 4px;
  color: rgba(238, 242, 247, 0.85);
  text-decoration: none;
  font-size: 14px;
  transition: color 220ms cubic-bezier(0.33, 0, 0.2, 1), padding-left 220ms cubic-bezier(0.33, 0, 0.2, 1);
}

.page-about .about-hero__index a:hover {
  color: #00A9CE;
  padding-left: 12px;
}

.page-about .about-section {
  padding: 64px 0;
  border-bottom: 1px solid #D0D9E2;
  background: #fff;
}

.page-about .about-section--timeline {
  background: #EEF2F7;
}

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

.page-about .about-section__side {
  position: relative;
}

.page-about .about-section__num {
  display: block;
  font-family: "DIN Alternate", Impact, sans-serif;
  font-size: 88px;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1.5px #00A9CE;
  margin-bottom: 14px;
}

.page-about .about-section__title {
  margin: 0;
  font-family: Impact, "Noto Sans SC Black", "PingFang SC Semibold", sans-serif;
  font-size: 24px;
  line-height: 1.3;
  color: #202A3A;
}

.page-about .about-section__note {
  position: absolute;
  top: 0;
  right: 0;
  margin: 0;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: #5A6B7B;
}

.page-about .about-section__main {
  min-width: 0;
}

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

.page-about .about-why__lead-text {
  margin: 0 0 12px;
  font-size: 20px;
  font-weight: 700;
  color: #0B1F3A;
  line-height: 1.5;
}

.page-about .about-why__lead p {
  margin: 0 0 12px;
  color: #5A6B7B;
  line-height: 1.7;
  font-size: 15px;
}

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

.page-about .about-why__card {
  background: #fff;
  border: 1px solid #D0D9E2;
  border-radius: 6px;
  padding: 24px;
  box-shadow: 0 1px 3px rgba(11, 31, 58, 0.08);
  transition: transform 220ms cubic-bezier(0.33, 0, 0.2, 1), box-shadow 220ms cubic-bezier(0.33, 0, 0.2, 1);
}

.page-about .about-why__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 16px rgba(11, 31, 58, 0.12);
}

.page-about .about-why__card-tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: #fff;
  background: #00A9CE;
  border-radius: 3px;
  padding: 3px 10px;
  margin-bottom: 14px;
}

.page-about .about-why__card h3 {
  margin: 0 0 8px;
  font-size: 18px;
  color: #202A3A;
}

.page-about .about-why__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: #5A6B7B;
}

.page-about .about-history__intro {
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: flex-start;
}

.page-about .about-history__logo-wrap {
  flex-shrink: 0;
}

.page-about .about-history__logo-wrap img {
  width: 100%;
  max-width: 200px;
  height: auto;
  border-radius: 6px;
  border: 1px solid #D0D9E2;
  display: block;
}

.page-about .about-history__intro > p {
  margin: 0;
  color: #5A6B7B;
  line-height: 1.7;
  font-size: 15px;
  max-width: 580px;
}

.page-about .about-timeline {
  list-style: none;
  margin: 44px 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(to bottom, #00A9CE 0%, rgba(0, 169, 206, 0.24) 100%);
}

.page-about .about-timeline__item {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.page-about .about-timeline__item:last-child {
  margin-bottom: 0;
}

.page-about .about-timeline__rail {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}

.page-about .about-timeline__dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #FF7A00;
  border: 3px solid #fff;
  box-shadow: 0 0 0 2px #FF7A00, 0 2px 6px rgba(255, 122, 0, 0.5);
}

.page-about .about-timeline__card {
  background: #fff;
  border: 1px solid #D0D9E2;
  border-radius: 6px;
  box-shadow: 0 1px 3px rgba(11, 31, 58, 0.08);
  transition: box-shadow 220ms cubic-bezier(0.33, 0, 0.2, 1);
}

.page-about .about-timeline__card:hover {
  box-shadow: 0 4px 16px rgba(11, 31, 58, 0.12);
}

.page-about .about-timeline__card summary {
  list-style: none;
  cursor: pointer;
  padding: 20px 20px 16px;
}

.page-about .about-timeline__card summary::-webkit-details-marker {
  display: none;
}

.page-about .about-timeline__card summary::after {
  content: "+";
  float: right;
  font-family: "DIN Alternate", Impact, sans-serif;
  font-size: 22px;
  line-height: 1;
  color: #00A9CE;
  margin-left: 8px;
}

.page-about .about-timeline__card[open] summary::after {
  content: "−";
}

.page-about .about-timeline__period {
  display: block;
  font-family: "DIN Alternate", Impact, sans-serif;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: #FF7A00;
  text-transform: uppercase;
}

.page-about .about-timeline__card h3 {
  margin: 8px 0 8px;
  font-size: 19px;
  color: #202A3A;
  line-height: 1.4;
}

.page-about .about-timeline__card summary p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: #5A6B7B;
}

.page-about .about-timeline__detail {
  border-top: 1px dashed #D0D9E2;
  padding: 16px 20px 20px;
  color: #5A6B7B;
  font-size: 14px;
  line-height: 1.65;
}

.page-about .about-timeline__detail p {
  margin: 0;
}

.page-about .about-security__top {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-about .about-security__intro h3 {
  margin: 0 0 10px;
  font-size: 20px;
  color: #202A3A;
}

.page-about .about-security__intro p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: #5A6B7B;
}

.page-about .about-security__figure {
  margin: 0;
  position: relative;
}

.page-about .about-security__figure img {
  width: 100%;
  max-width: 300px;
  height: auto;
  border-radius: 6px 6px 0 0;
  display: block;
  border: 1px solid #D0D9E2;
  border-bottom: 0;
  transition: transform 220ms cubic-bezier(0.33, 0, 0.2, 1), box-shadow 220ms cubic-bezier(0.33, 0, 0.2, 1);
}

.page-about .about-security__figure:hover img {
  transform: translateY(-3px);
  box-shadow: 0 4px 16px rgba(11, 31, 58, 0.12);
}

.page-about .about-security__figure figcaption {
  background: #0B1F3A;
  color: #EEF2F7;
  padding: 12px 16px;
  border-radius: 0 0 6px 6px;
  font-size: 13px;
  line-height: 1.5;
  max-width: 300px;
}

.page-about .about-security__figure-tag {
  display: inline-block;
  background: #FF7A00;
  color: #fff;
  border-radius: 3px;
  font-size: 12px;
  padding: 2px 8px;
  margin-right: 8px;
}

.page-about .about-security__list {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-security__item {
  background: #EEF2F7;
  border: 1px solid #D0D9E2;
  border-radius: 6px;
  padding: 22px 24px;
}

.page-about .about-security__item-num {
  font-family: "DIN Alternate", Impact, sans-serif;
  font-size: 30px;
  color: #00A9CE;
  display: block;
  line-height: 1;
}

.page-about .about-security__item h4 {
  margin: 12px 0 8px;
  font-size: 17px;
  color: #202A3A;
}

.page-about .about-security__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: #5A6B7B;
}

.page-about .about-ningxia {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 32px;
  border: 1px solid #D0D9E2;
  border-radius: 6px;
  overflow: hidden;
  background: #fff;
}

.page-about .about-ningxia > img {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
}

.page-about .about-ningxia__content {
  padding: 24px;
}

.page-about .about-ningxia__tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: #0B1F3A;
  background: #00A9CE;
  border-radius: 3px;
  padding: 3px 10px;
  margin-bottom: 12px;
}

.page-about .about-ningxia__content h3 {
  margin: 0 0 8px;
  font-size: 19px;
  color: #202A3A;
}

.page-about .about-ningxia__content p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: #5A6B7B;
}

.page-about .about-promise__banner {
  background: linear-gradient(135deg, #0B1F3A 0%, #123557 100%);
  border-radius: 8px;
  padding: 36px 28px;
  color: #EEF2F7;
  position: relative;
  overflow: hidden;
}

.page-about .about-promise__banner::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 180px;
  height: 180px;
  border: 1px solid rgba(0, 169, 206, 0.3);
  border-radius: 50%;
}

.page-about .about-promise__banner::after {
  content: "";
  position: absolute;
  top: -20px;
  right: -20px;
  width: 100px;
  height: 100px;
  border: 1px solid rgba(0, 169, 206, 0.18);
  border-radius: 50%;
}

.page-about .about-promise__slogan {
  margin: 0 0 16px;
  font-family: Impact, "Noto Sans SC Black", "PingFang SC Semibold", sans-serif;
  font-size: 44px;
  line-height: 1.1;
  color: #FF7A00;
  position: relative;
  z-index: 1;
}

.page-about .about-promise__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(238, 242, 247, 0.9);
  max-width: 560px;
  position: relative;
  z-index: 1;
}

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

.page-about .about-promise__links .btn {
  margin: 0;
}

.page-about .about-promise__contact {
  margin: 28px 0 0;
  font-size: 13px;
  color: #5A6B7B;
  line-height: 1.6;
}

@media (min-width: 640px) {
  .page-about .about-history__intro {
    flex-direction: row;
    align-items: center;
  }

  .page-about .about-ningxia {
    flex-direction: row;
  }

  .page-about .about-ningxia > img {
    width: 400px;
    height: 300px;
    flex-shrink: 0;
    object-fit: cover;
  }

  .page-about .about-ningxia__content {
    padding: 32px;
  }

  .page-about .about-security__top {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  .page-about .about-security__intro {
    flex: 1;
    max-width: 560px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 56px 0 64px;
  }

  .page-about h1 .about-hero h1 {
    font-size: 52px;
  }

  .page-about .about-hero__layout {
    grid-template-columns: 1.4fr 0.6fr;
    gap: 48px;
    align-items: end;
  }

  .page-about .about-hero__stats {
    padding: 0 0 0 24px;
    border-top: 0;
    border-left: 1px solid rgba(208, 217, 226, 0.22);
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .page-about .about-hero__index ol {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-section {
    padding: 88px 0;
  }

  .page-about .about-section__layout {
    grid-template-columns: 250px 1fr;
    gap: 56px;
  }

  .page-about .about-section__title {
    font-size: 28px;
  }

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

  .page-about .about-why__lead-text {
    font-size: 24px;
  }

  .page-about .about-timeline::before {
    left: 23px;
  }

  .page-about .about-timeline__item {
    grid-template-columns: 48px 1fr;
    gap: 24px;
    margin-bottom: 32px;
  }

  .page-about .about-timeline__card summary {
    padding: 24px;
  }

  .page-about .about-timeline__detail {
    padding: 18px 24px 24px;
  }

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

  .page-about .about-promise__banner {
    padding: 48px;
  }

  .page-about .about-promise__slogan {
    font-size: 56px;
  }

  .page-about .about-promise__links {
    gap: 16px;
  }
}