* {
  box-sizing: border-box;
}
:root {
  font-family: "Microsoft YaHei UI", system-ui, sans-serif;
}
body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: radial-gradient(
    circle at 20% 10%,
    #287db9 0,
    #123f70 38%,
    #081b31 100%
  );
  padding: 20px;
}
main {
  width: min(410px, 100%);
  padding: 36px 34px;
  text-align: center;
  background: #fffffffa;
  border: 1px solid #ffffff40;
  border-radius: 22px;
  box-shadow: 0 24px 80px #0006;
}
.logo {
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  margin: 0 auto 18px;
  border-radius: 18px;
  background: linear-gradient(135deg, #1686cf, #124e88);
  color: white;
  font-size: 28px;
  font-weight: 800;
  box-shadow: 0 10px 25px #1675b94d;
}
h1 {
  margin: 0;
  color: #18344f;
  font-size: 25px;
}
p {
  color: #718399;
  margin: 9px 0 26px;
}
label {
  display: block;
  text-align: left;
  color: #4c6278;
  font-size: 14px;
}
input {
  display: block;
  width: 100%;
  margin-top: 7px;
  padding: 13px 14px;
  border: 1px solid #cbd8e5;
  border-radius: 10px;
  font: inherit;
  outline: none;
}
input:focus {
  border-color: #2784c7;
  box-shadow: 0 0 0 3px #2784c71c;
}
button {
  width: 100%;
  margin-top: 17px;
  padding: 13px;
  border: 0;
  border-radius: 10px;
  background: linear-gradient(100deg, #1676bc, #185c9a);
  color: white;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}
button:disabled {
  opacity: 0.6;
}
#error {
  min-height: 22px;
  margin-top: 12px;
  color: #c53d3d;
  font-size: 14px;
}
small {
  color: #91a0af;
}

html { min-height: 100%; background: #081b31; }
body { min-height: 100dvh; padding: max(20px, env(safe-area-inset-top, 0)) max(20px, env(safe-area-inset-right, 0)) max(20px, env(safe-area-inset-bottom, 0)) max(20px, env(safe-area-inset-left, 0)); overscroll-behavior: none; -webkit-tap-highlight-color: transparent; }
input { font-size: 16px; }
button { min-height: 46px; touch-action: manipulation; }
@media (max-width: 430px) {
  main { padding: 30px 22px; border-radius: 18px; }
  .logo { width: 58px; height: 58px; margin-bottom: 15px; }
  h1 { font-size: 22px; }
  p { margin-bottom: 22px; }
}