@font-face {
  font-family: "Alibaba PuHuiTi";
  src: url("/static/static/plug/font/Alibaba-PuHuiTi-Regular.otf") format("opentype");
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
}

:root {
  color-scheme: light;
  --ink: #101828;
  --ink-soft: #344054;
  --muted: #667085;
  --paper: #f7f9fc;
  --surface: #fff;
  --line: #e4e7ec;
  --line-strong: #cfd6e1;
  --blue: #246bfe;
  --blue-dark: #1554d1;
  --green: #12b76a;
  --night: #101828;
  --radius: 10px;
  --shadow: 0 16px 40px rgba(16, 24, 40, .07);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Alibaba PuHuiTi", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
}

.site-shell {
  width: min(1240px, calc(100% - 48px));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  min-height: 76px;
  padding: 0 max(24px, calc((100vw - 1240px) / 2));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid rgba(228, 231, 236, .9);
  background: rgba(247, 249, 252, .94);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: 0 0 auto;
}

.brand::after {
  width: 1px;
  height: 24px;
  margin-left: 2px;
  background: var(--line-strong);
  content: "";
}

.brand img {
  width: 34px;
  height: 34px;
  display: block;
  border-radius: 9px;
}

.brand::before {
  position: absolute;
  margin-left: 46px;
  color: var(--ink);
  content: "OAIM";
  font-size: 17px;
  font-weight: 850;
  letter-spacing: .02em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
  overflow-x: auto;
}

.nav a {
  min-height: 38px;
  padding: 8px 12px;
  display: inline-flex;
  align-items: center;
  border-radius: 7px;
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 750;
  white-space: nowrap;
}

.nav a:hover {
  color: var(--blue);
  background: #edf3ff;
}

main {
  width: 100%;
}

.hero {
  padding: 88px 0 52px;
  border-bottom: 1px solid var(--line);
}

.hero > * {
  width: min(1240px, calc(100% - 48px));
  margin-inline: auto;
}

.eyebrow {
  margin: 0 0 15px;
  color: var(--blue);
  font-size: 12px;
  line-height: 18px;
  font-weight: 850;
  letter-spacing: .12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 800px;
  margin-bottom: 16px;
  font-size: 58px;
  line-height: 1.12;
  letter-spacing: 0;
}

.lead {
  max-width: 820px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.8;
}

.note {
  width: min(1240px, calc(100% - 48px));
  margin: 30px auto 0;
  padding: 15px 18px;
  border-left: 3px solid var(--blue);
  color: var(--ink-soft);
  background: #edf3ff;
  font-size: 14px;
  line-height: 1.75;
}

.page-list,
.backend-section {
  width: min(1240px, calc(100% - 48px));
  margin: 0 auto;
}

.page-list {
  padding: 56px 0 30px;
  display: grid;
  gap: 22px;
}

.page-card {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(300px, .82fr);
  gap: 34px;
  align-items: center;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.shot {
  min-width: 0;
  min-height: 260px;
  display: grid;
  place-items: center;
  overflow: hidden;
  border: 1px solid #d7dee8;
  border-radius: 8px;
  background: #eef2f6;
}

.shot img {
  width: 100%;
  height: auto;
  max-height: 520px;
  display: block;
  object-fit: contain;
  object-position: center;
  cursor: zoom-in;
}

.page-info {
  min-width: 0;
  padding: 6px 8px 6px 0;
}

.page-head {
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.page-head h2 {
  margin: 0;
  font-size: 28px;
  line-height: 1.25;
}

.tag {
  padding: 5px 8px;
  border: 1px solid #c8d8ff;
  border-radius: 6px;
  color: var(--blue);
  background: #edf3ff;
  font-size: 11px;
  font-weight: 850;
  line-height: 16px;
  white-space: nowrap;
}

.desc {
  margin-bottom: 17px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
}

.features {
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 9px;
  list-style: none;
}

.features li {
  position: relative;
  padding-left: 18px;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.65;
}

.features li::before {
  position: absolute;
  top: .72em;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  content: "";
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.btn {
  min-height: 42px;
  padding: 9px 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  color: var(--ink);
  background: var(--surface);
  font-size: 14px;
  line-height: 20px;
  font-weight: 800;
}

.btn:hover {
  border-color: #aeb9c8;
  transform: translateY(-1px);
}

.btn.primary {
  border-color: var(--blue);
  color: #fff;
  background: var(--blue);
}

.btn.primary:hover {
  border-color: var(--blue-dark);
  background: var(--blue-dark);
}

.backend-section {
  padding: 74px 0 20px;
  border-top: 1px solid var(--line);
}

.section-head {
  max-width: 820px;
  margin-bottom: 28px;
}

.section-head h2 {
  margin-bottom: 10px;
  font-size: 42px;
  line-height: 1.2;
  letter-spacing: 0;
}

.section-head p:not(.eyebrow) {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
}

.backend-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.backend-card {
  min-width: 0;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 10px 26px rgba(16, 24, 40, .05);
}

.backend-card img {
  width: 100%;
  height: 240px;
  display: block;
  border: 1px solid #d7dee8;
  border-radius: 7px;
  object-fit: contain;
  object-position: center;
  background: #eef2f6;
  cursor: zoom-in;
}

.backend-card h3 {
  margin: 14px 2px 6px;
  font-size: 18px;
  line-height: 1.35;
}

.backend-card p {
  margin: 0 2px 3px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.phone-grid .backend-card img {
  width: min(100%, 240px);
  height: 410px;
  margin: 0 auto;
  object-fit: contain;
}

.footer {
  width: min(1240px, calc(100% - 48px));
  margin: 70px auto 0;
  padding: 28px 0 34px;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

@media (max-width: 900px) {
  .topbar {
    min-height: 68px;
    padding-inline: 18px;
    align-items: flex-start;
    flex-direction: column;
    gap: 9px;
    padding-block: 12px;
  }

  .nav {
    width: 100%;
    justify-content: flex-start;
    padding-bottom: 2px;
  }

  .hero {
    padding-top: 62px;
  }

  .page-card {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .page-info {
    padding: 0 4px 6px;
  }

  .backend-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 600px) {
  .site-shell,
  .page-list,
  .backend-section,
  .footer,
  .hero > *,
  .note {
    width: calc(100% - 28px);
  }

  .brand::after,
  .brand::before {
    display: none;
  }

  .nav {
    flex-wrap: wrap;
    overflow-x: visible;
    gap: 7px;
  }

  .nav a {
    min-height: 34px;
    padding: 6px 10px;
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: 0 6px 14px rgba(16, 24, 40, .04);
  }

  .hero {
    padding: 42px 0 36px;
  }

  h1 {
    font-size: 40px;
  }

  .lead {
    font-size: 16px;
  }

  .page-list {
    padding-top: 36px;
  }

  .shot {
    min-height: 180px;
  }

  .page-head h2,
  .section-head h2 {
    font-size: 30px;
  }

  .backend-section {
    padding-top: 56px;
  }

  .backend-grid {
    grid-template-columns: 1fr;
  }

  .backend-card img,
  .phone-grid .backend-card img {
    height: auto;
    max-height: 520px;
  }

  .phone-grid .backend-card img {
    width: min(100%, 280px);
  }

  .footer {
    align-items: flex-start;
    flex-direction: column;
  }
}