/* 运营后台样式 */
:root {
  --a-navy: #0b2540;
  --a-navy-2: #123a5e;
  --a-gold: #c8a45c;
  --a-line: #e3e6ea;
  --a-bg: #f2f4f7;
  --a-text: #1a1a1a;
  --a-gray: #6b7280;
  --a-ok: #1e7a3c;
  --a-err: #b0302a;
  --a-warn: #b8860b;
  --sidebar-w: 216px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  font-size: 14px;
  color: var(--a-text);
  background: var(--a-bg);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; font-size: 14px; }

/* ---------- 登录 ---------- */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(120% 90% at 20% 10%, #1c4f7c, #0b2540 60%, #071a2e);
  padding: 20px;
}
.login-box {
  width: 100%;
  max-width: 380px;
  background: #fff;
  padding: 38px 34px 30px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.28);
}
.login-brand {
  text-align: center;
  margin-bottom: 26px;
}
.login-brand img { width: 52px; height: 52px; margin: 0 auto 10px; }
.login-brand h1 { font-size: 20px; letter-spacing: 3px; color: var(--a-navy); margin: 0 0 2px; font-weight: 700; }
.login-brand p { margin: 0; font-size: 12px; letter-spacing: 2px; color: var(--a-gold); }
.login-box .field { margin-bottom: 15px; }
.login-box label { display: block; font-size: 13px; color: var(--a-gray); margin-bottom: 6px; }
.login-box input {
  width: 100%;
  padding: 11px 13px;
  border: 1px solid var(--a-line);
  border-radius: 3px;
  outline: none;
}
.login-box input:focus { border-color: var(--a-gold); }
.btn-login {
  width: 100%;
  background: var(--a-navy);
  color: #fff;
  border: 0;
  padding: 12px;
  font-size: 15px;
  letter-spacing: 2px;
  border-radius: 3px;
  margin-top: 6px;
}
.btn-login:hover { background: var(--a-navy-2); }
.login-tip { margin-top: 16px; font-size: 12px; color: var(--a-gray); text-align: center; line-height: 1.7; }

/* ---------- 布局 ---------- */
.layout { display: flex; min-height: 100vh; }
.sidebar {
  width: var(--sidebar-w);
  background: var(--a-navy);
  color: rgba(255, 255, 255, 0.72);
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 30;
  transition: transform 0.3s;
}
.sb-brand {
  padding: 18px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
  display: flex;
  align-items: center;
  gap: 10px;
}
.sb-brand img { width: 30px; height: 30px; }
.sb-brand b { color: #fff; font-size: 15px; letter-spacing: 2px; }
.sb-brand span { display: block; font-size: 10.5px; letter-spacing: 2px; color: var(--a-gold); }
.sb-nav { flex: 1; overflow-y: auto; padding: 12px 0; }
.sb-group { font-size: 11px; letter-spacing: 2px; color: rgba(255, 255, 255, 0.35); padding: 14px 20px 6px; }
.sb-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  font-size: 13.5px;
  border-left: 3px solid transparent;
}
.sb-nav a:hover { color: #fff; background: rgba(255, 255, 255, 0.05); }
.sb-nav a.on { color: #fff; background: rgba(200, 164, 92, 0.14); border-left-color: var(--a-gold); }
.sb-nav a i {
  width: 16px;
  height: 16px;
  display: inline-block;
  opacity: 0.75;
  flex-shrink: 0;
}
.sb-foot {
  padding: 14px 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.09);
  font-size: 12px;
}
.sb-foot .u { color: #fff; margin-bottom: 8px; }
.sb-foot button {
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.7);
  padding: 5px 10px;
  font-size: 12px;
  border-radius: 2px;
}
.sb-foot button:hover { color: #fff; border-color: var(--a-gold); }

.main {
  flex: 1;
  margin-left: var(--sidebar-w);
  min-width: 0;
  display: flex;
  flex-direction: column;
}
.topbar-admin {
  height: 56px;
  background: #fff;
  border-bottom: 1px solid var(--a-line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  position: sticky;
  top: 0;
  z-index: 20;
}
.topbar-admin h1 { font-size: 16px; font-weight: 600; margin: 0; }
.topbar-admin .right { display: flex; align-items: center; gap: 12px; }
.topbar-admin .view-site {
  font-size: 13px;
  color: var(--a-gray);
  border: 1px solid var(--a-line);
  padding: 6px 12px;
  border-radius: 3px;
}
.topbar-admin .view-site:hover { color: var(--a-gold); border-color: var(--a-gold); }
.sb-toggle { display: none; background: none; border: 0; font-size: 20px; padding: 4px 8px; }

.content { padding: 22px; flex: 1; }

/* ---------- 卡片 ---------- */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 20px; }
.card {
  background: #fff;
  border: 1px solid var(--a-line);
  padding: 18px;
  border-radius: 3px;
}
.card .k { font-size: 12.5px; color: var(--a-gray); margin-bottom: 8px; }
.card .v { font-size: 27px; font-weight: 700; color: var(--a-navy); line-height: 1.1; }
.card .v small { font-size: 14px; color: var(--a-gray); font-weight: 400; }
.card .sub { font-size: 12px; color: var(--a-gold); margin-top: 6px; }

.panel {
  background: #fff;
  border: 1px solid var(--a-line);
  border-radius: 3px;
  margin-bottom: 18px;
}
.panel-head {
  padding: 14px 18px;
  border-bottom: 1px solid var(--a-line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.panel-head h3 { font-size: 14.5px; margin: 0; font-weight: 600; }
.panel-body { padding: 18px; }
.panel-body.flush { padding: 0; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }

/* ---------- 工具条 ---------- */
.toolbar {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  padding: 14px 18px;
  border-bottom: 1px solid var(--a-line);
}
.toolbar .search {
  flex: 1;
  min-width: 160px;
  max-width: 300px;
  padding: 8px 12px;
  border: 1px solid var(--a-line);
  border-radius: 3px;
  outline: none;
}
.toolbar .search:focus { border-color: var(--a-gold); }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border: 1px solid var(--a-line);
  background: #fff;
  border-radius: 3px;
  font-size: 13.5px;
  white-space: nowrap;
}
.btn:hover { border-color: var(--a-gold); color: var(--a-gold); }
.btn-primary { background: var(--a-navy); color: #fff; border-color: var(--a-navy); }
.btn-primary:hover { background: var(--a-navy-2); color: #fff; border-color: var(--a-navy-2); }
.btn-gold { background: var(--a-gold); color: var(--a-navy); border-color: var(--a-gold); }
.btn-gold:hover { background: #d8b46c; color: var(--a-navy); }
.btn-danger { color: var(--a-err); border-color: #f0c8c5; }
.btn-danger:hover { background: var(--a-err); color: #fff; border-color: var(--a-err); }
.btn-sm { padding: 5px 10px; font-size: 12.5px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ---------- 表格 ---------- */
.table-wrap { overflow-x: auto; }
table.tb { width: 100%; border-collapse: collapse; font-size: 13.5px; }
table.tb th {
  background: #fafbfc;
  text-align: left;
  padding: 11px 14px;
  font-weight: 600;
  color: var(--a-gray);
  border-bottom: 1px solid var(--a-line);
  white-space: nowrap;
}
table.tb td {
  padding: 11px 14px;
  border-bottom: 1px solid #f0f1f3;
  vertical-align: middle;
}
table.tb tr:last-child td { border-bottom: 0; }
table.tb tbody tr:hover { background: #fafbfc; }
.tb-title { font-weight: 500; color: var(--a-navy); }
.tb-sub { font-size: 12px; color: var(--a-gray); margin-top: 2px; }
.tb-ops { display: flex; gap: 6px; justify-content: flex-end; }

.badge {
  display: inline-block;
  padding: 2px 8px;
  font-size: 12px;
  border-radius: 10px;
  background: #eef1f4;
  color: var(--a-gray);
}
.badge.on { background: #e7f4ec; color: var(--a-ok); }
.badge.off { background: #f4eaea; color: var(--a-err); }
.badge.gold { background: #fbf3e2; color: #96741f; }
.badge.new { background: #fdf0e6; color: #b5651d; }

/* ---------- 分页 ---------- */
.pager {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 6px;
  padding: 14px 18px;
  flex-wrap: wrap;
}
.pager button {
  min-width: 32px;
  height: 32px;
  border: 1px solid var(--a-line);
  background: #fff;
  border-radius: 3px;
  font-size: 13px;
}
.pager button:hover { border-color: var(--a-gold); color: var(--a-gold); }
.pager button.on { background: var(--a-navy); color: #fff; border-color: var(--a-navy); }
.pager button:disabled { opacity: 0.45; cursor: not-allowed; }

/* ---------- 弹窗 ---------- */
.modal-mask {
  position: fixed;
  inset: 0;
  background: rgba(11, 37, 64, 0.45);
  z-index: 100;
  display: none;
  overflow-y: auto;
  padding: 30px 16px;
}
.modal-mask.show { display: block; }
.modal {
  background: #fff;
  max-width: 760px;
  margin: 0 auto;
  border-radius: 4px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}
.modal-wide { max-width: 900px; }
.modal-head {
  padding: 16px 20px;
  border-bottom: 1px solid var(--a-line);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.modal-head h3 { font-size: 15.5px; margin: 0; }
.modal-head .x { background: none; border: 0; font-size: 22px; color: var(--a-gray); line-height: 1; }
.modal-body { padding: 20px; }
.modal-foot {
  padding: 14px 20px;
  border-top: 1px solid var(--a-line);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.f { display: flex; flex-direction: column; gap: 6px; }
.f.full { grid-column: 1 / -1; }
.f > label { font-size: 13px; color: var(--a-gray); }
.f > label i { color: var(--a-err); font-style: normal; margin-right: 2px; }
.f input[type="text"],
.f input[type="number"],
.f input[type="url"],
.f input[type="email"],
.f select,
.f textarea {
  padding: 9px 11px;
  border: 1px solid var(--a-line);
  border-radius: 3px;
  outline: none;
  width: 100%;
  background: #fff;
}
.f input:focus, .f select:focus, .f textarea:focus { border-color: var(--a-gold); }
.f textarea { min-height: 88px; resize: vertical; line-height: 1.7; }
.f textarea.tall { min-height: 340px; font-size: 13.5px; }
.f .hint { font-size: 12px; color: var(--a-gray); }
.f .switch { display: flex; align-items: center; gap: 8px; font-size: 13.5px; }
.f .switch input { width: auto; }

/* 图片上传 */
.img-field { display: flex; gap: 10px; align-items: flex-start; }
.img-preview {
  width: 88px;
  height: 66px;
  border: 1px dashed var(--a-line);
  background: #fafbfc;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  flex-shrink: 0;
}
.img-preview img { width: 100%; height: 100%; object-fit: cover; }
.img-preview span { font-size: 11.5px; color: #b8bfc9; }

/* Markdown 工具条 */
.md-bar {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  margin-bottom: 6px;
  border: 1px solid var(--a-line);
  border-bottom: 0;
  border-radius: 3px 3px 0 0;
  padding: 5px 6px;
  background: #fafbfc;
}
.md-bar button {
  border: 0;
  background: none;
  font-size: 12px;
  color: var(--a-gray);
  padding: 3px 7px;
  border-radius: 2px;
}
.md-bar button:hover { background: #eef1f4; color: var(--a-navy); }
.md-bar + textarea { border-radius: 0 0 3px 3px; }

/* 设置项 */
.set-group { margin-bottom: 22px; }
.set-group > h4 {
  font-size: 13.5px;
  color: var(--a-navy);
  margin: 0 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--a-line);
}

/* 时间线（留言详情等） */
.logs { font-size: 13px; }
.logs li { padding: 9px 0; border-bottom: 1px dashed var(--a-line); display: flex; gap: 10px; }
.logs li:last-child { border-bottom: 0; }
.logs .t { color: var(--a-gray); font-size: 12px; flex-shrink: 0; width: 128px; }
.logs .a { color: var(--a-navy); font-weight: 500; }

.msg-item { border: 1px solid var(--a-line); border-radius: 3px; padding: 14px 16px; margin-bottom: 10px; background: #fff; }
.msg-item .h { display: flex; justify-content: space-between; gap: 10px; margin-bottom: 8px; flex-wrap: wrap; }
.msg-item .h b { font-size: 14.5px; }
.msg-item .m { font-size: 12.5px; color: var(--a-gray); }
.msg-item .c { font-size: 13.5px; line-height: 1.85; background: #fafbfc; padding: 10px 12px; border-left: 2px solid var(--a-gold); white-space: pre-wrap; }

/* 提示条 */
.toast {
  position: fixed;
  top: 18px;
  left: 50%;
  transform: translateX(-50%) translateY(-80px);
  background: var(--a-navy);
  color: #fff;
  padding: 11px 20px;
  border-radius: 3px;
  font-size: 13.5px;
  z-index: 200;
  opacity: 0;
  transition: 0.3s;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  max-width: 90vw;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.err { background: var(--a-err); }
.toast.ok { background: #14683a; }

.chart-bars { display: flex; align-items: flex-end; gap: 6px; height: 150px; padding-top: 10px; }
.chart-bars .b { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 5px; }
.chart-bars .bar {
  width: 100%;
  max-width: 34px;
  background: linear-gradient(180deg, #c8a45c, #123a5e);
  min-height: 2px;
  border-radius: 2px 2px 0 0;
}
.chart-bars .l { font-size: 11px; color: var(--a-gray); }

.empty { text-align: center; padding: 50px 20px; color: var(--a-gray); font-size: 13.5px; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
  .grid-2 { grid-template-columns: 1fr; }
}
@media (max-width: 860px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); box-shadow: 4px 0 20px rgba(0, 0, 0, 0.3); }
  .main { margin-left: 0; }
  .sb-toggle { display: block; }
  .content { padding: 14px; }
  .cards { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .card { padding: 14px; }
  .card .v { font-size: 22px; }
  .form-grid { grid-template-columns: 1fr; }
  .modal { max-width: 100%; }
  .toolbar { padding: 12px 14px; }
  .toolbar .search { max-width: none; }
  .panel-head { padding: 12px 14px; }
  .panel-body { padding: 14px; }
  .tb-ops { justify-content: flex-start; }
  .logs li { flex-direction: column; gap: 2px; }
  .logs .t { width: auto; }
}

/* ============ 渲染性能优化 ============ */
.panel, .modal, .table-wrap { contain: layout paint; }
.sb-nav a, .btn, .tb tbody tr { transition: none; }
.tb tbody tr:hover { background: #fafbfc; }
#modal .modal-body { overscroll-behavior: contain; }
/* 访客分析：堆叠柱与图例 */
.chart-bars .bar { position: relative; display: flex; flex-direction: column-reverse; justify-content: flex-start; }
.chart-bars .bar i { display: block; width: 100%; }
.chart-bars .bar i.s1 { background: #2f6f9f; }
.chart-bars .bar i.s2 { background: #c8a45c; }
.chart-bars .bar i.s3 { background: #b3271d; }
.legend { margin-top: 12px; font-size: 12px; color: #6b7280; display: flex; align-items: center; gap: 6px; }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-left: 12px; }
.legend i:first-child { margin-left: 0; }
.legend i.s1 { background: #2f6f9f; }
.legend i.s2 { background: #c8a45c; }
.legend i.s3 { background: #b3271d; }
.badge.b-ai { background: #fdeceb; color: #b3271d; }