:root {
  --bg: #f4f6fb;
  --surface: #ffffff;
  --ink: #1f2a44;
  --muted: #7a8aa0;
  --line: #e7ebf3;
  --primary: #4f6ef7;
  --primary-d: #3f59e0;
  --primary-soft: #eef2ff;
  --success: #2bb673;
  --success-soft: #e6f7ef;
  --warn: #e6a23c;
  --warn-soft: #fdf3e3;
  --danger: #f56c6c;
  --danger-soft: #fdecec;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 6px 24px rgba(31, 42, 68, .08);
  --shadow-sm: 0 2px 8px rgba(31, 42, 68, .06);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", Roboto, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font);
  background:
    radial-gradient(1200px 500px at 100% -10%, #eaf0ff 0%, transparent 60%),
    radial-gradient(900px 400px at -10% 0%, #eafaf2 0%, transparent 55%),
    var(--bg);
  color: var(--ink);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; transition: color .15s; }
a:hover { color: var(--primary-d); }
code { background: #eef1f8; padding: 1px 6px; border-radius: 5px; font-size: 12px; color: #445; }

/* ---------- 顶栏 ---------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  height: 58px; padding: 0 22px;
  background: linear-gradient(120deg, #1f2a44 0%, #2b3a63 60%, #3a5bd9 100%);
  color: #fff; position: sticky; top: 0; z-index: 50;
  box-shadow: 0 4px 18px rgba(31, 42, 68, .25);
}
.topbar .brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 16px; letter-spacing: .3px; }
.topbar .brand::before {
  content: ""; width: 26px; height: 26px; border-radius: 8px;
  background: linear-gradient(135deg, #6f8bff, #4f6ef7);
  box-shadow: inset 0 0 0 2px rgba(255,255,255,.25);
}
.topbar nav { display: flex; align-items: center; gap: 4px; }
.topbar nav a {
  color: #c7d2ea; margin: 0 4px; font-size: 14px; padding: 8px 12px; border-radius: 8px;
  transition: background .15s, color .15s;
}
.topbar nav a:hover { background: rgba(255,255,255,.12); color: #fff; }
.topbar nav a.active { color: #fff; background: rgba(255,255,255,.16); }
.topbar nav a.logout { color: #ffc2c2; }
.topbar nav a.logout:hover { background: rgba(245,108,108,.22); color: #fff; }

/* ---------- 容器 ---------- */
.container { max-width: 1180px; margin: 26px auto; padding: 0 18px; }
.page-title { margin: 0 0 18px; font-size: 20px; font-weight: 800; color: var(--ink); display: flex; align-items: center; gap: 10px; }
.page-title::before { content: ""; width: 5px; height: 20px; border-radius: 4px; background: linear-gradient(180deg, #5b78ff, #4f6ef7); }

/* ---------- 统计卡片 ---------- */
.stats { display: flex; gap: 16px; align-items: center; margin-bottom: 20px; flex-wrap: wrap; }
.stat {
  flex: 1; min-width: 150px; background: var(--surface); border-radius: var(--radius);
  padding: 16px 20px; box-shadow: var(--shadow-sm); border: 1px solid var(--line);
  position: relative; overflow: hidden; font-size: 13px; color: var(--muted);
}
.stat::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
  background: var(--primary); opacity: .85;
}
.stat span { display: block; font-size: 26px; font-weight: 800; color: var(--ink); margin-bottom: 2px; }
.stat.warn::before { background: var(--warn); }
.stat.warn span { color: var(--warn); }
.stat.danger::before { background: var(--danger); }
.stat.danger span { color: var(--danger); }
.stats .btn { flex: 0 0 auto; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  background: linear-gradient(135deg, #5b78ff, #4f6ef7); color: #fff; border: none;
  padding: 9px 18px; border-radius: var(--radius-sm); cursor: pointer; font-size: 14px;
  font-weight: 600; box-shadow: 0 4px 12px rgba(79,110,247,.28); transition: transform .12s, box-shadow .2s, filter .2s;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 8px 18px rgba(79,110,247,.34); filter: brightness(1.03); }
.btn:active { transform: translateY(0); }
.btn.ghost { background: #fff; color: var(--primary); border: 1px solid #d4defb; box-shadow: none; }
.btn.ghost:hover { background: var(--primary-soft); transform: none; }
.btn:focus-visible { outline: 3px solid rgba(79,110,247,.35); outline-offset: 1px; }

/* ---------- 表格 ---------- */
.grid {
  width: 100%; border-collapse: separate; border-spacing: 0; background: var(--surface);
  border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--line);
}
.grid th, .grid td { padding: 12px 14px; text-align: left; font-size: 13px; border-bottom: 1px solid var(--line); }
.grid th { background: #f7f9fd; color: var(--muted); font-weight: 600; white-space: nowrap; }
.grid tbody tr { transition: background .15s; }
.grid tbody tr:hover { background: #f5f8ff; }
.grid tbody tr:last-child td { border-bottom: none; }
.grid .ops a { margin-right: 10px; font-weight: 600; }
.grid .ops a:last-child { color: var(--danger); }
.empty { text-align: center; color: var(--muted); padding: 28px; }

/* ---------- 状态胶囊 ---------- */
.badge, .dot {
  display: inline-block; padding: 3px 11px; border-radius: 20px; font-size: 12px; font-weight: 600; color: #fff;
}
.badge.ok { background: var(--success); }
.badge.warn { background: var(--warn); }
.badge.danger { background: var(--danger); }
.dot { background: #b6bfce; }
.dot.s0 { background: #b6bfce; }
.dot.s1 { background: var(--success); }
.dot.s2 { background: var(--danger); }

/* ---------- 批量操作条 ---------- */
.batch { margin-top: 14px; display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.batch select, .filter select {
  padding: 9px 12px; border-radius: var(--radius-sm); border: 1px solid var(--line);
  background: #fff; font-size: 14px; color: var(--ink); outline: none;
}
.batch select:focus, .filter select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79,110,247,.15); }

/* ---------- 表单 / 卡片 ---------- */
.form {
  background: var(--surface); border-radius: var(--radius); padding: 26px;
  box-shadow: var(--shadow); border: 1px solid var(--line); max-width: 540px;
}
.form h2, .card h3 { margin-top: 0; }
.form label { display: block; margin: 14px 0 5px; font-size: 13px; color: #54627e; font-weight: 600; }
.form input[type=text], .form input[type=number], .form input[type=password],
.form input[type=datetime-local], .form select, .form textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: var(--radius-sm);
  font-size: 14px; background: #fbfcfe; color: var(--ink); transition: border-color .15s, box-shadow .15s; outline: none;
}
.form input:focus, .form select:focus, .form textarea:focus {
  border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79,110,247,.15); background: #fff;
}
.form label.chk { display: flex; align-items: center; gap: 9px; color: var(--ink); font-size: 14px; font-weight: 500; }
.form label.chk input { width: auto; accent-color: var(--primary); }
.actions { margin-top: 22px; display: flex; gap: 10px; }

.form.wide { max-width: 980px; display: grid; grid-template-columns: repeat(auto-fit, minmax(330px, 1fr)); gap: 16px; align-items: start; }
.form.wide .card { margin-bottom: 0; }
.form.wide input[type=hidden] { display: none; }

.card {
  background: var(--surface); border-radius: var(--radius); padding: 20px;
  box-shadow: var(--shadow-sm); border: 1px solid var(--line); margin-bottom: 16px;
}
.card h3 { display: flex; align-items: center; gap: 10px; font-size: 15px; }
.card label { display: block; margin: 12px 0 4px; font-size: 13px; color: #54627e; font-weight: 600; }
.card input[type=text], .card input[type=number], .card input[type=password], .card input[type=datetime-local], .card select, .card textarea {
  width: 100%; padding: 9px 11px; border: 1px solid var(--line); border-radius: var(--radius-sm);
  font-size: 14px; background: #fbfcfe; outline: none; transition: border-color .15s, box-shadow .15s;
}
.card input:focus, .card select:focus, .card textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79,110,247,.15); background: #fff; }
.card label.chk { display: flex; align-items: center; gap: 8px; font-weight: 500; color: var(--ink); }
.chkon { accent-color: var(--primary); width: 16px; height: 16px; }

/* ---------- 提示 ---------- */
.alert { padding: 12px 16px; border-radius: var(--radius-sm); margin-bottom: 16px; font-size: 14px; border: 1px solid transparent; }
.alert.success { background: var(--success-soft); color: #1c7a4d; border-color: #c7ecd6; }
.alert.error { background: var(--danger-soft); color: #c0392b; border-color: #f3c7c7; }
.hint { font-size: 12px; color: var(--muted); margin: 6px 0 0; }
.note { font-size: 12px; color: var(--muted); margin-top: 8px; }
.testout { background: #1f2a44; color: #d6e0f5; padding: 14px; border-radius: var(--radius-sm); font-size: 13px; white-space: pre-wrap; }
.filter { margin-bottom: 14px; display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }

/* ---------- 登录页 ---------- */
.login-wrap {
  display: flex; align-items: center; justify-content: center; min-height: 100vh; padding: 20px;
  background: linear-gradient(135deg, #1f2a44 0%, #2b3a63 45%, #4f6ef7 100%);
}
.login-box {
  background: #fff; padding: 36px 32px; border-radius: 18px; width: 340px;
  box-shadow: 0 20px 60px rgba(0,0,0,.3); animation: pop .35s ease;
}
@keyframes pop { from { opacity: 0; transform: translateY(12px) scale(.98); } to { opacity: 1; transform: none; } }
.login-box h2 { margin: 0 0 6px; text-align: center; font-size: 20px; }
.login-box .sub { text-align: center; color: var(--muted); font-size: 13px; margin: 0 0 22px; }
.login-box label { display: block; margin: 14px 0 5px; font-size: 13px; color: #54627e; font-weight: 600; }
.login-box input {
  width: 100%; padding: 11px 13px; border: 1px solid var(--line); border-radius: var(--radius-sm);
  font-size: 14px; outline: none; transition: border-color .15s, box-shadow .15s; background: #fbfcfe;
}
.login-box input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79,110,247,.15); background: #fff; }
.login-box button { width: 100%; margin-top: 22px; }

/* ---------- 页脚 ---------- */
.footer { text-align: center; color: var(--muted); font-size: 12px; padding: 28px; }
.footer code { background: #eef1f8; }

@media (max-width: 640px) {
  .topbar { padding: 0 14px; }
  .topbar nav a { padding: 7px 9px; font-size: 13px; }
  .stat { min-width: 120px; }
  .container { margin: 16px auto; }
}