:root {
  color-scheme: light;
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  color: #18231f;
  background: #edf2ef;
}

* { box-sizing: border-box; }

body {
  min-height: 100vh;
  margin: 0;
  display: grid;
  grid-template-rows: auto 1fr auto;
  background: #edf2ef;
}

.login-brand {
  min-height: 76px;
  padding: 16px clamp(20px, 5vw, 72px);
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid #cfdbd5;
  background: #f8faf9;
}

.login-brand img {
  width: 42px;
  height: 42px;
  object-fit: contain;
}

.login-brand div { display: grid; gap: 2px; }
.login-brand strong { font-size: 16px; letter-spacing: 0; }
.login-brand span { color: #6b7e75; font-size: 10px; letter-spacing: 0; }

.login-main {
  width: min(100%, 1080px);
  margin: 0 auto;
  padding: 48px 20px;
  display: grid;
  place-items: center;
}

.login-panel {
  width: min(100%, 420px);
  padding: 34px;
  border: 1px solid #c9d5cf;
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 18px 50px rgba(28, 47, 39, 0.1);
}

.login-heading { margin-bottom: 26px; }
.login-heading span { color: #c0523f; font-size: 12px; font-weight: 700; }
.login-heading h1 { margin: 8px 0 0; font-size: 26px; letter-spacing: 0; }

.login-error {
  margin-bottom: 18px;
  padding: 10px 12px;
  border-left: 3px solid #c0523f;
  background: #fff2ef;
  color: #8e3527;
  font-size: 13px;
}

form { display: grid; gap: 9px; }
label { margin-top: 7px; color: #3f5048; font-size: 13px; font-weight: 700; }

input {
  width: 100%;
  height: 44px;
  padding: 0 12px;
  border: 1px solid #b9c8c0;
  border-radius: 6px;
  outline: none;
  background: #fbfcfb;
  color: #18231f;
  font: inherit;
}

input:focus {
  border-color: #238768;
  box-shadow: 0 0 0 3px rgba(35, 135, 104, 0.14);
}

button {
  height: 44px;
  margin-top: 15px;
  border: 0;
  border-radius: 6px;
  background: #176c55;
  color: #ffffff;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

button:hover { background: #115843; }
button:focus-visible { outline: 3px solid rgba(35, 135, 104, 0.3); outline-offset: 2px; }

footer {
  padding: 18px;
  color: #71837a;
  text-align: center;
  font-size: 12px;
}

@media (max-width: 520px) {
  .login-main { padding: 26px 16px; }
  .login-panel { padding: 26px 22px; }
  .login-brand { min-height: 68px; padding: 12px 18px; }
}