:root {
  color-scheme: light;
  font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  color: #182a34;
  background: #fff;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  place-items: center;
  background: #fff;
}
.entrance {
  width: min(1110px, calc(100% - 64px));
  padding: 56px 0;
  display: grid;
  grid-template-columns: 1fr minmax(340px, 435px);
  align-items: center;
  gap: clamp(35px, 8vw, 108px);
}
.brand, .label {
  display: flex;
  align-items: center;
  gap: 11px;
  color: #087f70;
  font-size: .74rem;
  font-weight: 750;
  letter-spacing: .2em;
}
h1, h2, p { margin: 0; }
h1 { font-size: clamp(3.5rem, 8vw, 6rem); letter-spacing: .055em; margin: 18px 0 14px; line-height: 1.14; }
.identity p, .description { color: #607480; line-height: 1.7; }
.identity p { font-size: 1rem; }
.card { padding: clamp(25px, 5vw, 43px); border: 1px solid #dce4e8; border-radius: 21px; background: #fff; box-shadow: 0 26px 72px #1a3b5010; }
h2 { margin: 10px 0 8px; font-size: 1.85rem; }
.description { font-size: .92rem; }
.provider { display: flex; align-items: center; gap: 12px; margin: 26px 0 17px; padding: 14px; border: 1px solid #dce4e8; border-radius: 11px; background: #f5f9f8; }
.provider-icon { display: grid; place-items: center; width: 36px; height: 36px; color: #087f70; background: #e5f7f1; border-radius: 8px; }
.provider strong, .provider small { display: block; }
.provider small { margin-top: 3px; color: #607480; }
.sign-in { display: flex; align-items: center; justify-content: center; gap: 8px; min-height: 49px; border-radius: 9px; background: #087f70; color: #fff; text-decoration: none; font-weight: 750; }
.sign-in:hover { background: #066a5e; }
.sign-in:focus-visible { outline: 2px solid #087f70; outline-offset: 4px; }
.hint { margin-top: 17px; color: #607480; font-size: .78rem; text-align: center; line-height: 1.65; }
@media (max-width: 700px) {
  .entrance { width: min(460px, calc(100% - 34px)); grid-template-columns: 1fr; gap: 26px; padding: 36px 0; }
  h1 { font-size: 3rem; margin: 12px 0 6px; }
  .identity p { font-size: .9rem; }
}