/* ============================================================
   登录页 —— 亮蓝渐变背景 · 白底圆角卡片 · 蓝色主按钮
   与 ccpcoj.css 蓝白色板统一
   ============================================================ */
html, body {
  height: 100%;
  background: #eef4ff;
}
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background:
    radial-gradient(circle at 15% 20%, rgba(59, 130, 246, 0.18) 0%, transparent 45%),
    radial-gradient(circle at 85% 80%, rgba(96, 165, 250, 0.18) 0%, transparent 45%),
    linear-gradient(135deg, #e7f0fe 0%, #f5f8fc 45%, #eaf3ff 100%);
}
.login-card-oj {
  width: 100%;
  max-width: 420px;
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  box-shadow: 0 18px 48px -18px rgba(13, 110, 253, 0.35);
  padding: 34px 34px 30px;
  animation: login-card-in 0.4s ease;
}
@keyframes login-card-in {
  from { transform: translateY(18px); opacity: 0; }
  to { transform: none; opacity: 1; }
}
.login-title { text-align: center; margin: 0 0 22px; }
.login-title .cpc-brand {
  color: #0d6efd;
  font-size: 26px;
  font-weight: 700;
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.login-title .cpc-brand::before {
  content: '';
  width: 24px;
  height: 24px;
  border-radius: 7px;
  background: linear-gradient(135deg, #0d6efd 0%, #60a5fa 100%);
  box-shadow: 0 4px 10px -3px rgba(13, 110, 253, 0.5);
  display: inline-block;
}
.login-title .sub { color: #6b7280; font-size: 13px; margin-top: 6px; }
.login-tabs {
  display: flex;
  margin-bottom: 22px;
  background: #f0f6ff;
  border-radius: 10px;
  padding: 4px;
}
.login-tabs .tab {
  flex: 1;
  text-align: center;
  padding: 8px 0;
  cursor: pointer;
  color: #6b7280;
  border: none;
  background: none;
  font-size: 14px;
  border-radius: 8px;
  transition: background-color 0.18s ease, color 0.18s ease;
}
.login-tabs .tab.active {
  color: #0d6efd;
  background: #fff;
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(13, 110, 253, 0.15);
}
.field { margin-bottom: 16px; }
.field label { font-weight: 500; color: #4b5563; display: block; margin-bottom: 6px; }
.form-err { color: #dc3545; font-size: 13px; min-height: 18px; margin: 4px 0; }
.btn-block-oj {
  width: 100%;
  margin-top: 8px;
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 9px;
  border: none;
  color: #fff;
  box-shadow: 0 6px 16px -5px rgba(13, 110, 253, 0.5);
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.2s ease;
}
.btn-block-oj:hover { transform: translateY(-2px); box-shadow: 0 10px 22px -6px rgba(13, 110, 253, 0.55); }
.btn-block-oj:active { transform: translateY(0); }
.demo-tip {
  margin-top: 20px;
  font-size: 12px;
  color: #6b7280;
  text-align: center;
  padding: 12px;
  border-radius: 9px;
  background-color: #f0f6ff;
  border: 1px dashed #c3d7f6;
}
.login-foot { text-align: center; color: #9aa3b2; font-size: 12px; margin-top: 18px; }