:root {
  --bg: #f3f6f7;
  --surface: #ffffff;
  --surface-soft: #f8fbfb;
  --ink: #142128;
  --muted: #65737c;
  --line: #d9e3e7;
  --line-strong: #bfccd2;
  --teal: #0f8f83;
  --teal-dark: #0a635c;
  --blue: #2f6fed;
  --amber: #b7791f;
  --red: #c2413b;
  --green: #23845f;
  --shadow: 0 14px 32px rgba(22, 35, 42, 0.08);
  --radius: 8px;
  --font: "Microsoft YaHei", "PingFang SC", "Segoe UI", Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.5;
}

button, input, select { font: inherit; }

.shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 248px minmax(0, 1fr);
}

.sidebar {
  max-height: 100vh;
  position: sticky;
  top: 0;
  overflow-y: auto;
  background: #13222b;
  color: #d8e6ea;
  padding: 22px 18px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 4px 16px;
  border-bottom: 1px solid rgba(255,255,255,.12);
}

.brand-mark {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: linear-gradient(135deg, #18a999, #2f6fed);
  color: #fff;
  font-weight: 800;
}

.brand strong { display: block; color: #fff; font-size: 15px; }
.brand span { display: block; color: #aabec7; font-size: 12px; }

.nav { display: grid; gap: 6px; }

.nav-section {
  display: block;
  margin: 12px 10px 4px;
  color: #78919c;
  font-size: 11px;
  font-weight: 800;
}

.nav-item {
  width: 100%;
  height: 42px;
  display: flex;
  align-items: center;
  gap: 10px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: #c8d7dd;
  padding: 0 12px;
  text-align: left;
  cursor: pointer;
  font-weight: 650;
}

.nav-item:hover, .nav-item.active {
  background: rgba(255,255,255,.1);
  color: #fff;
}

.nav-icon {
  width: 18px;
  height: 18px;
  color: currentColor;
}

.env-card {
  margin-top: auto;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px;
  align-items: start;
  padding: 14px;
  border: 1px solid rgba(255,255,255,.13);
  border-radius: var(--radius);
  background: rgba(255,255,255,.08);
}

.env-card strong { display: block; color: #fff; font-size: 13px; }
.env-card span:last-child { display: block; color: #aabec7; font-size: 12px; }

.status-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--muted);
  margin-top: 6px;
}
.status-dot.ok { background: var(--green); }
.status-dot.warn { background: var(--amber); }
.status-dot.bad { background: var(--red); }

.main { min-width: 0; }

.topbar {
  min-height: 74px;
  position: sticky;
  top: 0;
  z-index: 4;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 28px;
  background: rgba(255,255,255,.9);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.topbar h1 {
  margin: 0;
  font-size: 21px;
  line-height: 1.2;
}

.topbar p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.top-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  flex-wrap: wrap;
}

.control, .button, input {
  height: 36px;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  background: #fff;
  color: var(--ink);
  padding: 0 11px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  font-weight: 700;
  font-size: 13px;
}

.button.primary {
  background: var(--teal);
  border-color: var(--teal);
  color: #fff;
}

.button.ghost { background: #fff; }

.login-panel {
  display: none;
  padding: 22px 28px 0;
}

.login-panel.visible { display: block; }

.login-card {
  max-width: 560px;
  display: grid;
  gap: 14px;
  padding: 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.login-card h2 { margin: 0; font-size: 18px; }
.login-card p { margin: 4px 0 0; color: var(--muted); }
.login-card label { display: grid; gap: 6px; font-weight: 700; }
.login-card label span { font-size: 12px; color: var(--muted); }
.message { min-height: 18px; color: var(--muted); font-size: 12px; }

.mobile-nav {
  display: none;
  gap: 8px;
  overflow-x: auto;
  padding: 10px 14px;
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.mobile-nav button {
  height: 34px;
  white-space: nowrap;
  border: 1px solid var(--line-strong);
  background: #fff;
  border-radius: 7px;
  padding: 0 12px;
  color: var(--ink);
  font-weight: 700;
}

.mobile-nav button.active {
  background: var(--teal);
  border-color: var(--teal);
  color: #fff;
}

.content {
  padding: 26px 28px 34px;
}

.view { display: none; gap: 22px; }
.view.active { display: grid; }

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.metric, .panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.metric {
  min-height: 112px;
  display: grid;
  align-content: center;
  gap: 5px;
  padding: 16px;
}

.metric span { color: var(--muted); font-size: 12px; }
.metric strong { font-size: 27px; line-height: 1.1; }
.metric small { color: var(--muted); font-size: 12px; }

.ops-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.ops-card, .tenant-card, .setting-item, .step-card, .binding-card, .report-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
}

.ops-card {
  min-height: 170px;
  display: grid;
  align-content: start;
  gap: 8px;
  padding: 15px;
}

.ops-card strong {
  font-size: 30px;
  line-height: 1.1;
}

.ops-card h3, .tenant-card h3, .setting-item h3 {
  margin: 0;
  font-size: 15px;
}

.ops-card p, .tenant-card p, .setting-item p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.timeline-list {
  display: grid;
  gap: 10px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 10px;
  padding: 11px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface-soft);
}

.timeline-item time {
  color: var(--teal);
  font-weight: 800;
}

.tenant-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 14px;
}

.tenant-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  padding: 14px;
}

.tenant-stats {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.tenant-stats span {
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fff;
  color: var(--muted);
  font-size: 12px;
}

.tenant-stats strong {
  margin-right: 5px;
  color: var(--ink);
  font-size: 18px;
}

.stepper-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.step-card {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: start;
  padding: 14px;
}

.step-index {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 7px;
  background: var(--teal);
  color: #fff;
  font-weight: 800;
}

.step-card h3, .binding-card h3, .report-card h3 {
  margin: 0;
  font-size: 15px;
}

.step-card p, .binding-card p, .report-card p {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.progress-track {
  grid-column: 1 / -1;
  height: 7px;
  border-radius: 999px;
  background: #e6edf0;
  overflow: hidden;
}

.progress-track i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--teal), var(--blue));
}

.delivery-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, .9fr);
  gap: 18px;
}

.check-list, .win-list {
  display: grid;
  gap: 10px;
}

.check-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: start;
  padding: 11px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface-soft);
}

.check-item strong {
  display: block;
  font-size: 13px;
}

.check-item p {
  margin: 2px 0 0;
}

.win-item {
  display: flex;
  gap: 9px;
  align-items: center;
  padding: 11px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #f1fbf8;
  color: #25443d;
}

.win-item span {
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--green);
  color: #fff;
  font-weight: 800;
}

.binding-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.binding-card {
  display: grid;
  gap: 12px;
  padding: 14px;
}

.binding-card header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 10px;
}

.binding-meta {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 8px;
}

.binding-meta span {
  padding: 9px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fff;
  color: var(--muted);
  font-size: 12px;
}

.binding-meta strong {
  margin-right: 5px;
  color: var(--ink);
}

.dashboard-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(320px, .7fr);
  gap: 18px;
}

.billing-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 18px;
}

.panel {
  min-width: 0;
  padding: 18px;
}

.panel-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 14px;
}

.panel h2 {
  margin: 0;
  font-size: 16px;
}

.panel p {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.badge, .tag {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 2px 8px;
  border-radius: 6px;
  background: #edf3f5;
  color: #33424b;
  font-size: 12px;
  font-weight: 750;
  white-space: nowrap;
}

.badge.green, .tag.green { background: #e7f6ef; color: var(--green); }
.badge.amber, .tag.amber { background: #fff4dc; color: var(--amber); }
.badge.red, .tag.red { background: #feeceb; color: var(--red); }
.tag.blue { background: #e8efff; color: var(--blue); }

.room-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.room-card {
  display: grid;
  gap: 12px;
  min-height: 166px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
}

.room-card.online {
  background: #f1fbf8;
  border-color: #b9dfd6;
}

.room-card.offline {
  background: #fff8eb;
  border-color: #ead39a;
}

.room-card header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 10px;
}

.room-card h3 { margin: 0; font-size: 15px; }
.room-card p { margin: 2px 0 0; color: var(--muted); font-size: 12px; }

.room-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.mini-stat {
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fff;
}

.mini-stat span { display: block; color: var(--muted); font-size: 11px; }
.mini-stat strong { display: block; margin-top: 2px; font-size: 14px; }

.room-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.inline-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  min-width: 280px;
}

.usage-bars {
  height: 270px;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 9px;
  align-items: end;
  border-bottom: 1px solid var(--line);
  padding-top: 12px;
}

.usage-bar {
  min-height: 22px;
  border-radius: 6px 6px 0 0;
  background: linear-gradient(180deg, var(--blue), var(--teal));
}
.usage-bar:nth-child(3n) { background: linear-gradient(180deg, #7b61ff, var(--blue)); }
.usage-bar:nth-child(4n) { background: linear-gradient(180deg, #d19b36, var(--teal)); }

.legend {
  display: flex;
  gap: 12px;
  margin-top: 12px;
  color: var(--muted);
  font-size: 12px;
}
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.swatch { width: 10px; height: 10px; border-radius: 3px; display: inline-block; }
.swatch.teal { background: var(--teal); }
.swatch.blue { background: var(--blue); }
.swatch.amber { background: var(--amber); }

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
}

th, td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: middle;
  white-space: nowrap;
}

th {
  background: #f8fbfc;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

td { color: #33424b; font-size: 13px; }
tr:last-child td { border-bottom: 0; }

.bill-summary {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
}
.bill-summary span { color: var(--muted); font-size: 12px; }
.bill-summary strong { font-size: 32px; line-height: 1; }
.bill-summary p { margin: 0; }

.gateway-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.gateway-card {
  display: grid;
  gap: 10px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
}

.gateway-card h3 { margin: 0; font-size: 15px; }
.gateway-card p { margin: 0; color: var(--muted); font-size: 12px; }

.code-block {
  margin: 16px 0 0;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #f1f3f5;
  overflow-x: auto;
  font-family: Consolas, "Microsoft YaHei", monospace;
  font-size: 12px;
}

.audit-list { display: grid; }

.alert-list, .settings-list {
  display: grid;
  gap: 10px;
}

.alert-item, .setting-item {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr) auto;
  gap: 12px;
  align-items: start;
  padding: 13px;
  border-left: 4px solid var(--blue);
}

.alert-item.critical { border-left-color: var(--red); }
.alert-item.warning { border-left-color: var(--amber); }
.alert-item.info { border-left-color: var(--blue); }

.alert-item time {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.alert-item strong {
  display: block;
  font-size: 14px;
}

.alert-item p {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.settings-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 18px;
}

.setting-item {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 12px;
  padding: 13px;
}

.role-matrix {
  display: grid;
  gap: 10px;
}

.role-matrix div {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface-soft);
}

.role-matrix strong {
  display: block;
  margin-bottom: 3px;
}

.role-matrix span {
  color: var(--muted);
  font-size: 12px;
}

.report-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.report-card {
  min-height: 160px;
  display: grid;
  align-content: start;
  gap: 8px;
  padding: 15px;
}

.report-card strong {
  font-size: 28px;
  line-height: 1.1;
}

.audit-item {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}
.audit-item:last-child { border-bottom: 0; }
.audit-item time { color: var(--muted); font-size: 12px; }
.audit-item strong { display: block; font-size: 13px; }
.audit-item span { color: var(--muted); font-size: 12px; }

.toast {
  position: fixed;
  right: 20px;
  bottom: 20px;
  min-width: 220px;
  max-width: 420px;
  padding: 12px 14px;
  border-radius: 8px;
  background: #13222b;
  color: #fff;
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: opacity .18s ease, transform .18s ease;
}
.toast.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 1180px) {
  .metric-grid, .gateway-grid, .ops-grid, .tenant-grid, .stepper-grid, .report-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .dashboard-grid, .billing-grid, .settings-grid, .delivery-grid { grid-template-columns: 1fr; }
}

@media (max-width: 820px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .topbar {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px;
  }
  .top-actions {
    width: 100%;
    display: grid;
    grid-template-columns: minmax(0, 1fr) 58px;
    justify-content: stretch;
  }
  .top-actions > * { min-width: 0; }
  .top-actions .control { width: 100%; min-width: 0; }
  .top-actions .button { min-width: 0; padding-inline: 8px; }
  #loginOpenBtn {
    grid-column: 1 / -1;
    width: 100%;
  }
  .mobile-nav {
    display: flex;
    position: sticky;
    top: 74px;
    z-index: 3;
  }
  .content { padding: 16px 14px 24px; }
  .metric-grid, .room-grid, .gateway-grid, .ops-grid, .tenant-grid, .stepper-grid, .binding-grid, .report-grid { grid-template-columns: 1fr; }
  .panel { padding: 14px; }
  .panel-head {
    flex-direction: column;
    align-items: flex-start;
  }
  .audit-item, .alert-item { grid-template-columns: 1fr; gap: 4px; }
  .step-card, .binding-meta { grid-template-columns: 1fr; }
  .setting-item { flex-direction: column; }
}