/* ============ 登录页 ============ */
:root { --font: "PingFang SC", "HarmonyOS Sans SC", "MiSans", "Microsoft YaHei UI", "Microsoft YaHei", sans-serif; --display: Georgia, "Times New Roman", "Songti SC", "STSong", serif; }
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: var(--font);
  color: var(--ink);
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(1100px 520px at 6% -12%, var(--g1) 0%, transparent 62%),
    radial-gradient(800px 480px at 108% 4%, var(--g2) 0%, transparent 58%),
    radial-gradient(900px 600px at 50% 130%, var(--g3) 0%, transparent 62%),
    var(--bg);
}
.wrap { width: 100%; max-width: 380px; }
.card {
  background: rgba(255, 255, 255, .82);
  border: 1px solid var(--line, color-mix(in srgb, var(--rose) 16%, transparent));
  border-radius: 22px;
  padding: 30px 28px 24px;
  box-shadow: 0 24px 60px -24px rgba(var(--shadow-c), .45), 0 2px 8px -2px rgba(var(--shadow-c), .08);
  backdrop-filter: blur(10px);
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  height: 34px; min-width: 34px; padding: 0 8px; border-radius: 11px; display: grid; place-items: center;
  background: radial-gradient(circle at 30% 22%, var(--ball-a), var(--ball-b) 55%, var(--ball-c));
  box-shadow: 0 6px 14px -4px color-mix(in srgb, var(--rose) 60%, transparent);
  color: #fff; font: italic 700 18px/1 var(--display); letter-spacing: -.3px;
}
.brand-name { font: italic 700 24px/1 var(--display); letter-spacing: .2px; }
.sub { margin: 10px 0 22px; color: var(--muted); font-size: 12.5px; letter-spacing: .4px; }
.field { display: block; margin-bottom: 14px; }
.field span { display: block; font-size: 12px; color: var(--ink-2); margin-bottom: 6px; letter-spacing: 1px; }
.field input {
  width: 100%; height: 42px; padding: 0 12px; border-radius: 12px;
  border: 1.5px solid color-mix(in srgb, var(--rose) 22%, transparent);
  background: var(--soft-2); color: var(--ink); font: inherit; outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.field input:focus { border-color: var(--rose); box-shadow: 0 0 0 3px color-mix(in srgb, var(--rose) 14%, transparent); }
.err { min-height: 18px; color: #D33A5E; font-size: 12.5px; margin: 2px 0 8px; }
.btn {
  width: 100%; height: 44px; border: 0; border-radius: 13px; cursor: pointer;
  background: linear-gradient(135deg, var(--rose-2), var(--rose)); color: #fff;
  font: 600 15px/1 var(--font); letter-spacing: 6px; text-indent: 6px;
  box-shadow: 0 10px 22px -10px color-mix(in srgb, var(--rose) 80%, transparent);
  transition: transform .12s, filter .12s;
}
.btn:hover { filter: brightness(1.04); }
.btn:active { transform: translateY(1px); }
.btn[disabled] { opacity: .65; cursor: default; }
.hint { margin: 16px 0 0; color: var(--muted); font-size: 11.5px; line-height: 1.7; }
.foot { text-align: center; color: var(--muted); font-size: 11px; margin: 16px 0 0; letter-spacing: 1px; }
@media (max-width: 420px) { .card { padding: 24px 20px 20px; border-radius: 18px; } }