:root {
  --about-bg: #e9eef8;
  --about-text: #0e1724;
  --about-muted: #313e58;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  overflow-x: hidden;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--about-text);
  background: var(--about-bg);
}

img {
  display: block;
  max-width: 100%;
}

.container {
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
}

.about-main {
  min-height: calc(100vh - 60px);
  padding-top: 60px;
  background: url("img/about.png") no-repeat right top #e8f2fe;
  background-size: 100% auto;
}

.about-hero {
  position: relative;
  padding: 158px 0 46px;
}

.about-hero .container {
  display: grid;
  grid-template-columns: minmax(0, 520px) minmax(0, 1fr);
  align-items: end;
  gap: 28px;
  position: relative;
  z-index: 1;
}

.about-copy h1 {
  margin: 0;
  font-size: 50px;
  line-height: 1.05;
  font-weight: 800;
  letter-spacing: -0.8px;
}

.about-copy .about-lead {
  margin: 14px 0 12px;
  font-size: 16px;
  line-height: 1.5;
  color: #1f2d49;
}

.about-copy h2 {
  margin: 0;
  font-size: 24px;
  line-height: 1.18;
  font-weight: 800;
  display: inline-block;
  position: relative;
  z-index: 1;
  isolation: isolate;
}

.about-copy h2::after {
  content: "";
  position: absolute;
  left: 52%;
  bottom: -9px;
  width: 275px;
  height: 28px;
  background: url("img/zhengmo/line.png") center/contain no-repeat;
  transform: translateX(-50%);
  z-index: -1;
}

.about-art {
  align-self: center;
  justify-self: end;
  width: min(520px, 100%);
  transform: translateY(18px);
}

.about-art img {
  width: 100%;
  filter: drop-shadow(0 26px 46px rgba(38, 105, 206, 0.16));
}

.about-content {
  padding: 8px 0 72px;
}

.about-content .container {
  max-width: 1120px;
}

.about-content p {
  margin: 0 0 26px;
  font-size: 17px;
  line-height: 1.78;
  color: var(--about-muted);
  letter-spacing: 0.2px;
}

.about-content p:last-child {
  margin-bottom: 0;
}

.site-footer {
  background: #f5f7fb;
  border-top: 1px solid #dde4f2;
}

.footer-inner {
  padding-top: 8px;
}

.footer-top {
  min-height: 0;
  display: grid;
  grid-template-columns: 220px 1fr 2fr;
  gap: 24px;
  align-items: start;
  padding: 8px 0 10px;
}

.footer-logo img {
  width: 86px;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: #121f41;
  margin: 8px 0 10px;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 20px;
}

.footer-links a,
.footer-col p {
  font-size: 14px;
  color: #56627a;
  text-decoration: none;
}

.footer-links a:hover {
  color: #1b4fff;
}

.footer-bottom {
  border-top: 1px solid #E4EEF9;
}

.footer-bottom-inner {
  min-height: 46px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.footer-bottom-inner span {
  font-size: 14px;
  color: #C3CAD4;
}

@media (max-width: 1024px) {
  .about-hero .container {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .about-art {
    justify-self: center;
    width: min(460px, 92%);
    transform: none;
  }

  .about-copy h1 {
    font-size: 48px;
  }

  .about-copy .about-lead {
    font-size: 30px;
  }

  .about-copy h2 {
    font-size: 42px;
  }

  .about-copy h2::after {
    width: 230px;
    bottom: 3px;
  }
}

@media (max-width: 768px) {
  .container {
    width: min(1120px, calc(100% - 28px));
  }

  .about-main {
    padding-top: 60px;
  }

  .about-hero {
    padding: 44px 0 28px;
  }

  .about-copy h1 {
    font-size: 42px;
  }

  .about-copy .about-lead {
    margin: 10px 0 8px;
    font-size: 24px;
    line-height: 1.45;
  }

  .about-copy h2 {
    font-size: 32px;
  }

  .about-copy h2::after {
    width: 172px;
    height: 18px;
    bottom: 2px;
  }

  .about-content {
    padding-bottom: 52px;
  }

  .about-content p {
    margin-bottom: 18px;
    font-size: 15px;
    line-height: 1.75;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .footer-links a,
  .footer-col p,
  .footer-bottom-inner span {
    font-size: 14px;
  }

  .footer-bottom-inner {
    min-height: auto;
    padding: 10px 0;
    display: grid;
    justify-content: start;
    gap: 6px;
  }
}