/* ============================================================
   登录页样式（与工作台共用设计变量）
   基调：极简黑白灰 + 玫红点缀 · 白卡圆角 10px · PingFang
   ============================================================ */
:root {
  --primary: #E11D48;
  --primary-dark: #BE123C;
  --primary-light: #FFF1F2;

  --bg: #F5F5F5;
  --card-bg: #FFFFFF;
  --text: #111111;
  --text-2: #666666;
  --text-muted: #999999;
  --text-soft: #AAAAAA;
  --border: #EBEBEB;
  --border-dark: #D4D4D4;

  --red: #E11D48;
  --red-light: #FFE4E9;
  --amber: #D97706;
  --amber-light: #FEF3C7;
  --green: #059669;

  --shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.06);
  --r-card: 10px;
  --r-sm: 8px;

  --font-sans: "PingFang SC", -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  --font-serif: "Noto Serif SC", "Songti SC", Georgia, "Times New Roman", serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: var(--font-sans);
  background: linear-gradient(160deg, #F5F5F5 0%, #FAFAFA 45%, #FFF1F2 100%);
  color: var(--text);
  font-size: 13px;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 16px;
}

.login-wrap { width: 100%; max-width: 400px; }

/* 品牌区 */
.login-brand { text-align: center; margin-bottom: 24px; }
.login-brand .login-logo {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border-radius: var(--r-card);
  background: var(--primary); color: #fff;
  font-size: 15px; font-weight: 600; letter-spacing: 0.5px;
}
.login-brand h1 { margin-top: 12px; font-size: 22px; font-weight: 600; line-height: 28px; color: #000; }
.login-brand p { margin-top: 6px; font-size: 12px; font-weight: 500; color: var(--text-muted); }

/* 卡片 */
.login-card {
  background: var(--card-bg);
  border-radius: var(--r-card);
  padding: 28px 24px 24px;
  box-shadow: var(--shadow-lg);
}

/* 表单 */
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 12px; font-weight: 500; color: var(--text-muted); margin-bottom: 6px; }
.field input {
  width: 100%; height: 40px; padding: 0 12px;
  border: 1px solid var(--border-dark); border-radius: var(--r-sm);
  font-size: 13px; color: var(--text); background: #fff;
  font-family: inherit;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.field input::placeholder { color: #BBBBBB; }
.field input:focus {
  outline: none; border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(225, 29, 72, 0.10);
}

.login-btn {
  width: 100%; height: 40px; margin-top: 4px;
  border: none; border-radius: var(--r-sm);
  background: #000; color: #fff;
  font-size: 13px; font-weight: 600; cursor: pointer;
  font-family: inherit;
  transition: background 0.15s, opacity 0.15s;
}
.login-btn:hover { background: #333333; }
.login-btn:disabled { opacity: 0.6; cursor: not-allowed; }

/* 错误提示 */
.login-tip {
  margin-top: 14px; padding: 10px 12px; border-radius: var(--r-sm);
  font-size: 12px; line-height: 1.6;
  background: var(--red-light); color: var(--primary-dark);
  display: none;
}
.login-tip.show { display: block; }

/* 演示账号 */
.demo-box { margin-top: 20px; border-top: 1px solid var(--border); padding-top: 16px; display: none; }
.demo-box.show { display: block; }
.demo-box .demo-title { font-size: 12px; font-weight: 600; color: var(--text-muted); margin-bottom: 10px; }
.demo-item {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 10px 12px; border: 1px solid var(--border); border-radius: var(--r-sm);
  margin-bottom: 8px; cursor: pointer; background: #fff;
  transition: border-color 0.15s, background 0.15s;
}
.demo-item:hover { border-color: #000; background: #FAFAFA; }
.demo-item .who { font-size: 13px; font-weight: 600; line-height: 18px; color: #000; }
.demo-item .who small { display: block; font-weight: 400; color: var(--text-muted); font-size: 11px; line-height: 14px; margin-top: 2px; }
.demo-item .tag {
  font-size: 11px; font-weight: 600; padding: 2px 8px; border-radius: 4px;
  background: var(--primary-light); color: var(--primary); white-space: nowrap;
}

.login-foot { margin-top: 18px; text-align: center; font-size: 11px; color: var(--text-soft); line-height: 1.8; }

@media (max-width: 480px) {
  body { padding: 24px 14px; }
  .login-card { padding: 22px 18px 20px; }
  .login-brand h1 { font-size: 19px; }
}