:root {
  --primary: #1f6feb;
  --primary-d: #155bb5;
  --bg: #f5f7fa;
  --panel: #ffffff;
  --border: #e3e8ef;
  --text: #1f2933;
  --muted: #6b7785;
  --ok: #1a7f37;
  --warn: #b58105;
  --danger: #c0392b;
  --radius: 8px;
}
* { box-sizing: border-box; }
body {
  margin: 0; font-family: -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
  background: var(--bg); color: var(--text); font-size: 14px;
}
a { color: var(--primary); text-decoration: none; }
button, input, select, textarea {
  font-family: inherit; font-size: 14px;
}
.btn {
  display: inline-flex; align-items: center; gap: 6px; cursor: pointer;
  border: 1px solid var(--border); background: #fff; color: var(--text);
  padding: 7px 14px; border-radius: var(--radius); transition: .15s;
}
.btn:hover { border-color: var(--primary); }
.btn.primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn.primary:hover { background: var(--primary-d); }
.btn.danger { color: var(--danger); border-color: #f0c5c0; }
.btn.ghost { border-color: transparent; }
.btn:disabled { opacity: .55; cursor: not-allowed; }

/* 布局 */
#app { display: flex; min-height: 100vh; }
.sidebar {
  width: 220px; background: #0f2540; color: #cdd9e8; flex-shrink: 0;
  display: flex; flex-direction: column;
}
.sidebar .brand {
  padding: 18px 18px; font-size: 16px; font-weight: 700; color: #fff;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.sidebar nav { padding: 8px; overflow-y: auto; flex: 1; }
.sidebar nav a {
  display: block; padding: 10px 12px; border-radius: 6px; color: #cdd9e8; margin-bottom: 2px;
}
.sidebar nav a:hover { background: rgba(255,255,255,.06); color: #fff; }
.sidebar nav a.active { background: var(--primary); color: #fff; }
.sidebar .foot { padding: 12px; font-size: 12px; color: #7d8 da; border-top: 1px solid rgba(255,255,255,.08); }
.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.topbar {
  height: 54px; background: var(--panel); border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between; padding: 0 20px;
}
.topbar .user { display: flex; align-items: center; gap: 10px; color: var(--muted); }
.content { padding: 22px; overflow-y: auto; flex: 1; }
.card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; margin-bottom: 16px;
}
.card h3 { margin: 0 0 12px; font-size: 15px; }
.row { display: flex; gap: 12px; flex-wrap: wrap; }
.muted { color: var(--muted); }
.tiny { font-size: 12px; }
.right { margin-left: auto; }

/* 表单 */
label { display: block; margin: 10px 0 4px; color: var(--muted); font-size: 13px; }
input[type=text], input[type=password], input[type=number], select, textarea {
  width: 100%; padding: 9px 11px; border: 1px solid var(--border); border-radius: 6px; background: #fff;
}
textarea { resize: vertical; min-height: 90px; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; font-size: 12px; }
tr:hover td { background: #fafbfc; }
.tag { display: inline-block; padding: 2px 8px; border-radius: 10px; background: #eef2f7; color: var(--muted); font-size: 12px; }
.tag.role-admin { background: #e7f0ff; color: var(--primary); }
.tag.on { background: #e6f4ea; color: var(--ok); }
.tag.off { background: #fdecea; color: var(--danger); }

/* 登录 / 安装 */
.auth-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg,#0f2540,#1f6feb); }
.auth-box { background: #fff; width: 380px; max-width: 92vw; border-radius: 12px; padding: 30px; box-shadow: 0 10px 40px rgba(0,0,0,.2); }
.auth-box h2 { margin: 0 0 4px; }
.tabs { display: flex; gap: 6px; margin-bottom: 12px; }
.tabs .tab { padding: 7px 14px; border-radius: 6px; cursor: pointer; background: #eef2f7; color: var(--muted); }
.tabs .tab.active { background: var(--primary); color: #fff; }

/* 答复工具台 */
.reply-grid { display: grid; grid-template-columns: 1fr 320px; gap: 16px; }
@media (max-width: 900px) { .reply-grid { grid-template-columns: 1fr; } .sidebar { width: 100%; } #app { flex-direction: column; } .sidebar nav { display: flex; flex-wrap: wrap; } }
#answer { min-height: 200px; border: 1px solid var(--border); border-radius: 6px; padding: 14px; white-space: pre-wrap; background: #fcfdfe; }
.src { border-left: 3px solid var(--primary); padding: 6px 10px; margin: 6px 0; background: #f6f9ff; border-radius: 0 6px 6px 0; }
.hist-item { padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px; margin-bottom: 8px; cursor: pointer; }
.hist-item:hover { border-color: var(--primary); }
.modal-mask { position: fixed; inset: 0; background: rgba(0,0,0,.4); display: flex; align-items: center; justify-content: center; z-index: 50; }
.modal { background: #fff; width: 520px; max-width: 94vw; border-radius: 10px; padding: 22px; max-height: 90vh; overflow-y: auto; }
.toast {
  position: fixed; top: 16px; left: 50%; transform: translateX(-50%); background: #1f2933; color: #fff;
  padding: 10px 18px; border-radius: 8px; z-index: 100; opacity: 0; transition: .25s; pointer-events: none;
}
.toast.show { opacity: 1; }
.toast.err { background: var(--danger); }
.toast.ok { background: var(--ok); }
.spinner { width: 16px; height: 16px; border: 2px solid rgba(255,255,255,.4); border-top-color: #fff; border-radius: 50%; animation: sp .7s linear infinite; display: inline-block; }
@keyframes sp { to { transform: rotate(360deg); } }
.code { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 12px; background: #f3f5f8; padding: 2px 6px; border-radius: 4px; }