:root {
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --primary-soft: #eef2ff;
  --danger: #dc2626;
  --danger-soft: #fef2f2;
  --ok: #16a34a;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --bg: #f5f6f8;
  --card: #ffffff;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(16, 24, 40, .06), 0 8px 24px rgba(16, 24, 40, .05);
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; }
button, input, select, textarea { font-family: inherit; font-size: 14px; }

/* ---------- 表单控件 ---------- */
.field { margin-bottom: 18px; }
.field > label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 14px; }
.field .req { color: var(--danger); margin-left: 3px; }
.field .help { color: var(--muted); font-size: 12.5px; margin-top: 5px; }
input[type=text], input[type=email], input[type=tel], input[type=number],
input[type=date], input[type=time], input[type=url], input[type=password],
select, textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 9px;
  background: #fff; color: var(--text); transition: border-color .15s, box-shadow .15s;
}
input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79, 70, 229, .12);
}
textarea { min-height: 92px; resize: vertical; }
input[type=file] {
  width: 100%; padding: 9px 12px; border: 1px dashed var(--border); border-radius: 9px; background: #fafafa; cursor: pointer;
}
.opt-row { display: flex; align-items: center; gap: 8px; padding: 5px 0; }
.opt-row input[type=radio], .opt-row input[type=checkbox] { width: 16px; height: 16px; accent-color: var(--primary); margin: 0; cursor: pointer; }
.opt-row label { margin: 0; font-weight: 400; cursor: pointer; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 9px 16px; border-radius: 9px; border: 1px solid transparent; cursor: pointer;
  font-weight: 500; font-size: 14px; transition: background .15s, border-color .15s, color .15s;
  background: var(--primary); color: #fff;
}
.btn:hover { background: var(--primary-dark); }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn.ghost { background: #fff; color: var(--text); border-color: var(--border); }
.btn.ghost:hover { background: #f3f4f6; }
.btn.danger { background: #fff; color: var(--danger); border-color: #fecaca; }
.btn.danger:hover { background: var(--danger-soft); }
.btn.sm { padding: 5px 10px; font-size: 13px; border-radius: 7px; }

.card { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); }
.pad { padding: 22px; }

.alert { padding: 11px 14px; border-radius: 9px; font-size: 14px; margin-bottom: 16px; }
.alert.err { background: var(--danger-soft); color: #991b1b; border: 1px solid #fecaca; }
.alert.ok { background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; }
.alert.info { background: var(--primary-soft); color: #3730a3; border: 1px solid #c7d2fe; }

.muted { color: var(--muted); }
.empty { text-align: center; padding: 46px 20px; color: var(--muted); }

/* ---------- 前台 ---------- */
.wrap { max-width: 680px; margin: 0 auto; padding: 34px 16px 60px; }
.site-head { text-align: center; margin-bottom: 22px; }
.site-head h1 { font-size: 24px; margin: 0 0 8px; }
.site-head p { margin: 0; color: var(--muted); font-size: 14px; }
.foot { text-align: center; margin-top: 20px; font-size: 12.5px; color: #9ca3af; }
.foot a { color: #9ca3af; }

/* ---------- 后台布局 ---------- */
.topbar {
  background: #fff; border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 20;
}
.topbar .inner { max-width: 1180px; margin: 0 auto; padding: 12px 18px; display: flex; align-items: center; gap: 16px; }
.logo { font-weight: 700; font-size: 16px; display: flex; align-items: center; gap: 8px; }
.logo .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--primary); display: inline-block; }
.tabs { display: flex; gap: 4px; flex: 1; flex-wrap: wrap; }
.tab {
  padding: 7px 14px; border-radius: 8px; cursor: pointer; font-size: 14px; color: var(--muted); border: none; background: transparent;
}
.tab:hover { background: #f3f4f6; }
.tab.active { background: var(--primary-soft); color: var(--primary); font-weight: 600; }
.main { max-width: 1180px; margin: 0 auto; padding: 22px 18px 60px; }
.page { display: none; }
.page.active { display: block; }
.page-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.page-head h2 { margin: 0; font-size: 19px; }
.row-actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* 统计卡 */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; margin-bottom: 18px; }
.stat { padding: 16px 18px; }
.stat .k { color: var(--muted); font-size: 13px; }
.stat .v { font-size: 26px; font-weight: 700; margin-top: 4px; }

/* 字段列表 */
.flist { display: flex; flex-direction: column; gap: 10px; }
.fitem {
  display: flex; align-items: flex-start; gap: 12px; padding: 13px 15px;
  border: 1px solid var(--border); border-radius: 10px; background: #fff;
}
.fitem.off { opacity: .5; background: #fafafa; }
.fitem .meta { flex: 1; min-width: 0; }
.fitem .t { font-weight: 600; font-size: 14.5px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.fitem .d { color: var(--muted); font-size: 12.5px; margin-top: 3px; word-break: break-all; }
.fitem .ops { display: flex; gap: 6px; align-items: center; }
.drag { cursor: grab; color: #9ca3af; padding: 0 2px; user-select: none; font-size: 16px; }
.badge { font-size: 11.5px; padding: 2px 7px; border-radius: 20px; background: var(--primary-soft); color: var(--primary); font-weight: 500; }
.badge.gray { background: #f3f4f6; color: var(--muted); }
.badge.red { background: var(--danger-soft); color: var(--danger); }

/* 表格 */
.tablewrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th, td { padding: 11px 12px; text-align: left; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { background: #fafafa; font-weight: 600; color: #374151; position: sticky; top: 0; }
tbody tr:hover { background: #fafbff; }
td.clip { max-width: 220px; overflow: hidden; text-overflow: ellipsis; }
.pager { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 16px; flex-wrap: wrap; }
.searchbar { display: flex; gap: 8px; }
.searchbar input { width: 230px; }

/* 弹窗 */
.mask {
  position: fixed; inset: 0; background: rgba(17, 24, 39, .45); display: none;
  align-items: center; justify-content: center; z-index: 60; padding: 20px;
}
.mask.show { display: flex; }
.modal { background: #fff; border-radius: 14px; width: 100%; max-width: 540px; max-height: 88vh; overflow: auto; }
.modal .mh { padding: 16px 20px; border-bottom: 1px solid var(--border); font-weight: 600; font-size: 16px; display: flex; justify-content: space-between; align-items: center; }
.modal .mb { padding: 20px; }
.modal .mf { padding: 14px 20px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 8px; }
.close { border: none; background: transparent; cursor: pointer; font-size: 20px; color: var(--muted); line-height: 1; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 560px) { .grid2 { grid-template-columns: 1fr; } .searchbar input { width: 160px; } }

/* 登录 */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px; }
.login-box { width: 100%; max-width: 380px; padding: 30px 28px; }
.login-box h2 { margin: 0 0 6px; font-size: 20px; }
.login-box p.sub { margin: 0 0 20px; color: var(--muted); font-size: 13.5px; }

.kv { display: flex; gap: 10px; padding: 9px 0; border-bottom: 1px dashed var(--border); }
.kv:last-child { border-bottom: none; }
.kv .k { width: 130px; flex: none; color: var(--muted); font-size: 13.5px; }
.kv .v { flex: 1; word-break: break-all; font-size: 14px; }

/* 提交成功弹窗 */
.ok-icon {
  width: 54px; height: 54px; border-radius: 50%; background: #ecfdf5; color: var(--ok);
  display: flex; align-items: center; justify-content: center; font-size: 30px;
  margin: 4px auto 14px; font-weight: 700;
}
.ok-body { text-align: center; white-space: pre-wrap; font-size: 14.5px; color: var(--text); line-height: 1.75; }

.toast {
  position: fixed; left: 50%; transform: translateX(-50%); bottom: 34px; z-index: 90;
  background: #111827; color: #fff; padding: 10px 18px; border-radius: 9px; font-size: 14px;
  opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(-6px); }