:root {
  color-scheme: light;
  color: #172f2d;
  background: #eef3ef;
  font: 16px/1.55 "Microsoft YaHei", system-ui, sans-serif;
}
body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  padding: 24px;
  box-sizing: border-box;
}
main {
  box-sizing: border-box;
  width: min(100%, 440px);
  padding: clamp(22px, 6vw, 42px);
  background: #fff;
  border: 1px solid #cbdad0;
  border-radius: 16px;
}
.brand { color: #176146; font-weight: 700; }
.brand span { margin-right: 0.35rem; font-size: 1.45rem; }
h1 { margin: 1rem 0; font-size: 2rem; letter-spacing: -0.04em; }
form { display: grid; }
label { margin: 0.65rem 0 0.3rem; font-weight: 600; }
input, button { min-height: 44px; box-sizing: border-box; border-radius: 8px; font: inherit; }
input { width: 100%; padding: 0.5rem 0.65rem; color: inherit; border: 1px solid #9fb8ac; }
button { margin-top: 1.15rem; border: 1px solid #146347; background: #146347; color: #fff; cursor: pointer; font-weight: 700; }
button:hover { background: #0c4b35; }
:focus-visible { outline: 3px solid #236a9e; outline-offset: 2px; }
.message { margin: 0 0 0.85rem; padding: 0.65rem; border-radius: 8px; color: #793914; background: #fff0e4; }