/* ============ 登录页专用样式 ============ */
:root {
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --bg: #f1f5f9;
  --border: #e2e8f0;
  --text: #1e293b;
  --text-2: #475569;
  --text-3: #94a3b8;
  --danger: #ef4444;
  --ok: #16a34a;
  --radius: 10px;
  --font: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body { font-family: var(--font); background: var(--bg); color: var(--text); font-size: 14px; }
.hidden { display: none !important; }
svg { display: inline-block; vertical-align: -2px; }

.login-wrap {
  position: fixed; inset: 0; z-index: 300;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 18px;
  background:
    radial-gradient(1200px 500px at 20% -10%, rgba(99, 102, 241, .35), transparent 60%),
    radial-gradient(1000px 500px at 90% 110%, rgba(139, 92, 246, .28), transparent 60%),
    #0f172a;
}
.login-card {
  width: 380px; max-width: 92vw;
  background: #fff; border-radius: 16px; padding: 34px 32px 26px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, .35);
  display: flex; flex-direction: column; gap: 14px;
}
.login-logo {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  font-size: 26px; font-weight: 800; color: var(--primary); letter-spacing: 2px;
}
.login-sub { text-align: center; color: var(--text-3); font-size: 13px; margin-top: -6px; }
.login-err { color: var(--danger); font-size: 13px; min-height: 18px; text-align: center; }
.login-foot { color: #64748b; font-size: 12px; text-align: center; }
.login-foot a { color: #a5b4fc; text-decoration: none; }
.login-foot a:hover { text-decoration: underline; }
.login-switch { color: var(--primary); cursor: pointer; background: none; border: none; font-size: 13px; padding: 2px 4px; font-family: inherit; }
.login-switch:hover { text-decoration: underline; }

.field { display: flex; flex-direction: column; gap: 5px; font-size: 13px; color: var(--text-2); }
input {
  font-family: inherit; font-size: 13.5px; color: var(--text);
  padding: 9px 11px; border: 1px solid #cbd5e1; border-radius: 8px; background: #fff;
  outline: none; transition: border-color .15s, box-shadow .15s;
}
input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(99, 102, 241, .15); }

.btn {
  font-family: inherit; font-size: 13.5px; padding: 8px 16px; border-radius: 8px;
  border: 1px solid #cbd5e1; background: #fff; color: var(--text); cursor: pointer;
  transition: background .15s, border-color .15s, color .15s; white-space: nowrap;
}
.btn:hover:not(:disabled) { background: #f8fafc; border-color: #94a3b8; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn.primary:hover:not(:disabled) { background: var(--primary-hover); border-color: var(--primary-hover); }
.btn.block { width: 100%; padding: 10px; font-size: 15px; }

/* ============ 手机适配 ============ */
@media (max-width: 640px) {
  .login-wrap { overflow-y: auto; padding: 24px 0; }
  .login-card {
    width: 92vw; max-width: 400px; margin: auto;
    padding: 26px 20px 22px; border-radius: 14px; gap: 12px;
  }
  .login-logo { font-size: 22px; }
  input { font-size: 16px; padding: 10px 12px; }
  .btn { font-size: 15px; }
  .btn.block { padding: 12px; font-size: 16px; }
}