:root {
  --sidebar-bg: #1e222d;
  --sidebar-w: 220px;
  --sidebar-text: #a6adb4;
  --sidebar-active: rgba(99, 102, 241, 0.18);
  --sidebar-active-text: #c7d2fe;
  --page-bg: #f0f2f5;
  --card-bg: #fff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --accent: #6366f1;
  --ok: #10b981;
  --warn: #f59e0b;
  --err: #ef4444;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  background: var(--page-bg);
  color: var(--text);
  font-size: 14px;
}

.admin-layout {
  display: flex;
  min-height: 100vh;
}

.admin-sidebar {
  width: var(--sidebar-w);
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
  overflow: hidden;
}

.admin-brand {
  padding: 18px 16px 14px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.admin-brand .logo {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.02em;
}
.admin-brand .sub {
  margin-top: 4px;
  font-size: 11px;
  color: #7c8493;
}

.admin-nav {
  flex: 1;
  overflow-y: auto;
  padding: 10px 8px 20px;
}
.admin-nav::-webkit-scrollbar { width: 4px; }
.admin-nav::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 4px; }

.nav-item, .nav-group-title {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--sidebar-text);
  text-decoration: none;
  font-size: 13px;
  border: none;
  background: transparent;
  width: 100%;
  cursor: pointer;
  text-align: left;
}
.nav-item:hover { background: rgba(255,255,255,0.05); color: #e5e7eb; }
.nav-item.active {
  background: var(--sidebar-active);
  color: var(--sidebar-active-text);
}
.nav-item svg, .nav-group-title svg { width: 18px; height: 18px; flex-shrink: 0; opacity: 0.85; }

.nav-group { margin-top: 4px; }
.nav-group-title { justify-content: space-between; }
.nav-group-title .chev { transition: transform .2s; }
.nav-group.open .chev { transform: rotate(180deg); }
.nav-sub { display: none; padding-left: 8px; }
.nav-group.open .nav-sub { display: block; }
.nav-sub .nav-item { padding-left: 36px; font-size: 12.5px; }

.admin-main-wrap {
  margin-left: var(--sidebar-w);
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.admin-topbar {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  position: sticky;
  top: 0;
  z-index: 50;
}
.breadcrumb { font-size: 12px; color: var(--muted); }
.breadcrumb a { color: var(--muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--accent); }
.page-title { margin: 4px 0 0; font-size: 20px; font-weight: 600; }
.page-sub { margin: 4px 0 0; font-size: 12px; color: var(--muted); }

.admin-content { padding: 20px 24px 40px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
}
.btn:hover { border-color: #cbd5e1; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { filter: brightness(1.05); }
.btn-danger { background: #fee2e2; border-color: #fecaca; color: #991b1b; }
.btn-sm { padding: 6px 10px; font-size: 12px; }

.auth-bar {
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-radius: 10px;
  padding: 12px 16px;
  margin-bottom: 16px;
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}
.auth-bar input {
  flex: 1;
  min-width: 200px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
}
.auth-bar.hidden { display: none; }

.admin-session {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.admin-session-user {
  text-align: right;
  line-height: 1.35;
}
.admin-session-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}
.admin-session-role {
  font-size: 11px;
  color: var(--muted);
}
.btn-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--muted);
  padding: 6px 10px;
}
.btn-ghost:hover {
  color: var(--text);
  background: #f3f4f6;
  border-color: var(--border);
}

/* ── 登录页 ── */
body.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(145deg, #1e222d 0%, #2d3348 45%, #f0f2f5 45%, #f0f2f5 100%);
  padding: 24px;
}
.login-wrap {
  width: 100%;
  max-width: 420px;
}
.login-card {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 32px 28px 24px;
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.12);
}
.login-brand { margin-bottom: 28px; }
.login-logo {
  font-size: 20px;
  font-weight: 700;
  color: #1e222d;
  letter-spacing: 0.02em;
}
.login-sub {
  margin: 6px 0 0;
  font-size: 13px;
  color: var(--muted);
}
.login-form { display: flex; flex-direction: column; gap: 6px; }
.login-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  margin-top: 10px;
}
.login-input {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.login-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}
.login-error {
  margin: 10px 0 0;
  padding: 10px 12px;
  border-radius: 8px;
  background: #fef2f2;
  color: #991b1b;
  font-size: 13px;
  line-height: 1.5;
}
.login-error.hidden { display: none; }
.login-btn {
  margin-top: 18px;
  width: 100%;
  padding: 12px 16px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}
.login-btn:hover:not(:disabled) { filter: brightness(1.05); }
.login-btn:disabled { opacity: 0.65; cursor: wait; }
.login-btn-outline {
  margin-top: 10px;
  background: #fff;
  color: var(--text);
  border: 1px solid var(--border);
  font-weight: 500;
  font-size: 14px;
}
.login-btn-outline:hover { background: #f9fafb; }
.login-advanced {
  margin-top: 20px;
  font-size: 12px;
  color: var(--muted);
}
.login-advanced summary {
  cursor: pointer;
  user-select: none;
}
.login-advanced-body {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.login-hint {
  margin: 20px 0 0;
  font-size: 11px;
  color: #9ca3af;
  line-height: 1.6;
  text-align: center;
}

.metric-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}
.metric-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}

.metric-card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 18px 18px 16px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
  border: 1px solid rgba(0,0,0,0.03);
  position: relative;
  overflow: hidden;
}
.metric-card .label { font-size: 13px; color: var(--muted); }
.metric-card .value { margin-top: 8px; font-size: 26px; font-weight: 700; line-height: 1.1; }
.metric-card .sub { margin-top: 6px; font-size: 12px; color: var(--muted); }
.metric-card .icon {
  position: absolute;
  right: 16px; top: 16px;
  width: 40px; height: 40px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
}
.icon-yellow { background: #fef3c7; color: #d97706; }
.icon-green { background: #d1fae5; color: #059669; }
.icon-red { background: #fee2e2; color: #dc2626; }
.icon-orange { background: #ffedd5; color: #ea580c; }
.icon-gray { background: #f3f4f6; color: #6b7280; }
.icon-teal { background: #ccfbf1; color: #0d9488; }

.panel {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 18px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
  border: 1px solid rgba(0,0,0,0.03);
}
.panel-title { font-size: 14px; font-weight: 600; margin: 0 0 14px; }

.donut-wrap {
  display: flex;
  align-items: center;
  gap: 24px;
}
.donut-big {
  font-size: 36px;
  font-weight: 700;
  color: var(--err);
}

.chart-bars {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  height: 120px;
  margin-top: 12px;
}
.chart-bar-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  min-width: 0;
}
.chart-bar {
  width: 100%;
  max-width: 36px;
  border-radius: 6px 6px 2px 2px;
  min-height: 4px;
  transition: height .3s;
}
.chart-bar-label { font-size: 10px; color: var(--muted); }

.bar-tan { background: linear-gradient(180deg, #d4a574, #c4956a); }
.bar-teal { background: linear-gradient(180deg, #5eead4, #2dd4bf); }
.bar-pink { background: linear-gradient(180deg, #f9a8d4, #ec4899); }

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.data-table th {
  text-align: left;
  padding: 10px 8px;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
  font-weight: 500;
  font-size: 12px;
}
.data-table td {
  padding: 10px 8px;
  border-bottom: 1px solid #f3f4f6;
  vertical-align: middle;
}
.data-table tr:hover td { background: #fafafa; }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 500;
}
.badge-ok { background: #d1fae5; color: #047857; }
.badge-warn { background: #fef3c7; color: #b45309; }
.badge-err { background: #fee2e2; color: #b91c1c; }
.badge-muted { background: #f3f4f6; color: #6b7280; }

.toolbar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 14px;
}
.toolbar input, .toolbar select {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
  min-width: 120px;
}

.form-grid label {
  display: block;
  font-size: 12px;
  color: var(--muted);
  margin: 12px 0 4px;
}
.form-grid input, .form-grid select, .form-grid textarea {
  width: 100%;
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
}

.status-toast {
  margin-top: 12px;
  font-size: 12px;
  color: var(--muted);
}

.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--muted);
}

@media (max-width: 1100px) {
  .metric-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .metric-grid-3 { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .admin-sidebar { transform: translateX(-100%); }
  .admin-main-wrap { margin-left: 0; }
  .metric-grid-4 { grid-template-columns: 1fr; }
}

/* 系统设置 Tab */
.settings-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0;
  background: var(--card-bg);
  border-radius: 10px 10px 0 0;
  overflow-x: auto;
}
.settings-tab {
  padding: 14px 20px;
  border: none;
  background: transparent;
  font-size: 14px;
  color: var(--muted);
  cursor: pointer;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
.settings-tab:hover { color: var(--text); }
.settings-tab.active {
  color: #e53935;
  border-bottom-color: #e53935;
  font-weight: 500;
}
.settings-panel-wrap {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 10px 10px;
  padding: 24px;
}
.settings-pane { display: none; }
.settings-pane.active { display: block; }
.settings-field {
  max-width: 480px;
  margin-bottom: 20px;
}
.settings-field label {
  display: block;
  font-size: 13px;
  color: var(--text);
  margin-bottom: 8px;
}
.settings-field input[type="text"],
.settings-field input[type="password"],
.settings-field input[type="number"],
.settings-field input[type="url"],
.settings-field input[type="email"],
.settings-field select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  background: #fff;
  color: var(--text);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.settings-field input[type="text"]:focus,
.settings-field input[type="password"]:focus,
.settings-field input[type="number"]:focus,
.settings-field input[type="url"]:focus,
.settings-field input[type="email"]:focus,
.settings-field select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}
.settings-field input::placeholder {
  color: #9ca3af;
}
.settings-field .hint {
  margin-top: 6px;
  font-size: 12px;
  color: #9ca3af;
  line-height: 1.5;
}

/* 外链配置：带前缀图标的 URL 输入 */
.settings-field-link {
  max-width: 640px;
}
.settings-field-link > label {
  font-weight: 500;
  margin-bottom: 10px;
}
.link-input-wrap {
  display: flex;
  align-items: stretch;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  background: linear-gradient(180deg, #fafbfc 0%, #f8fafc 100%);
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}
.link-input-wrap:hover {
  border-color: #cbd5e1;
  background: #fff;
}
.link-input-wrap:focus-within {
  border-color: var(--accent);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.14);
}
.link-input-prefix {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 0 14px;
  min-width: 52px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: #64748b;
  background: #f1f5f9;
  border-right: 1px solid #e2e8f0;
  flex-shrink: 0;
  user-select: none;
}
.link-input-wrap:focus-within .link-input-prefix {
  color: var(--accent);
  background: #eef2ff;
  border-right-color: #c7d2fe;
}
.link-input-wrap input[type="url"],
.link-input-wrap .link-input {
  flex: 1;
  min-width: 0;
  border: none;
  background: transparent;
  padding: 13px 14px;
  font-size: 14px;
  line-height: 1.4;
  color: var(--text);
  outline: none;
  box-shadow: none;
}
.link-input-wrap input[type="url"]:focus {
  border: none;
  box-shadow: none;
}
.link-input-status {
  display: flex;
  align-items: center;
  padding: 0 12px;
  flex-shrink: 0;
  font-size: 11px;
  color: #94a3b8;
  border-left: 1px solid #e2e8f0;
  background: #f8fafc;
}
.link-input-wrap.is-valid .link-input-status {
  color: var(--ok);
}
.link-input-wrap.is-invalid .link-input-status {
  color: var(--err);
}
.settings-hint-input {
  max-width: 640px;
}
.settings-hint-input .text-input-soft {
  width: 100%;
  padding: 11px 14px;
  border: 1px dashed #d1d5db;
  border-radius: 8px;
  font-size: 13px;
  background: #fafafa;
  color: var(--text);
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
}
.settings-hint-input .text-input-soft:focus {
  outline: none;
  border-style: solid;
  border-color: var(--accent);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}
.support-link-grid {
  display: grid;
  gap: 20px;
  max-width: 640px;
}
@media (min-width: 720px) {
  .support-link-grid--hints {
    grid-template-columns: 1fr 1fr;
    max-width: 720px;
  }
}
.settings-switch-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 480px;
  padding: 12px 0;
}
.settings-switch-row span { font-size: 14px; }
.switch-toggle {
  position: relative;
  width: 44px;
  height: 24px;
  flex-shrink: 0;
}
.switch-toggle input { opacity: 0; width: 0; height: 0; }
.switch-slider {
  position: absolute;
  inset: 0;
  background: #d1d5db;
  border-radius: 24px;
  cursor: pointer;
  transition: background 0.2s;
}
.switch-slider::before {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  left: 3px;
  top: 3px;
  background: #fff;
  border-radius: 50%;
  transition: transform 0.2s;
}
.switch-toggle input:checked + .switch-slider { background: #e53935; }
.switch-toggle input:checked + .switch-slider::before { transform: translateX(20px); }
.settings-notice {
  padding: 12px 14px;
  border-radius: 8px;
  font-size: 13px;
  line-height: 1.6;
  margin-bottom: 20px;
}
.settings-notice.info { background: #f3f4f6; color: #4b5563; }
.settings-notice.ok { background: #ecfdf5; color: #065f46; }
.btn-save-red {
  background: #e53935;
  color: #fff;
  border: none;
  padding: 10px 28px;
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
  margin-top: 8px;
}
.btn-save-red:hover { background: #c62828; }
.btn-outline {
  background: #fff;
  color: var(--text);
  border: 1px solid var(--border);
  padding: 10px 20px;
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
  margin-left: 10px;
}
.btn-outline:hover { background: #f9fafb; }
.settings-actions { margin-top: 24px; display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.form-row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; max-width: 720px; }
@media (max-width: 640px) { .form-row-2 { grid-template-columns: 1fr; } }
.settings-subtitle {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin: 28px 0 12px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}
.settings-pane .settings-subtitle:first-of-type {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}
.settings-field-wide { max-width: 720px; }
.settings-field textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  line-height: 1.45;
  resize: vertical;
  box-sizing: border-box;
}

.admin-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.admin-modal-backdrop.hidden { display: none; }
.admin-modal {
  width: 100%;
  max-width: 440px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.2);
  overflow: hidden;
}
.admin-modal-wide { max-width: 520px; }
.admin-modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  font-size: 16px;
  font-weight: 600;
}
.admin-modal-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.admin-modal-body .field label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 6px;
}
.admin-modal-body .field input,
.admin-modal-body .field select {
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
}
.admin-modal-body .field-hint {
  font-size: 11px;
  color: #9ca3af;
  margin-top: 4px;
}
.admin-modal-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}
.toolbar-spacer { flex: 1; }
.btn-success { background: #ecfdf5; border-color: #a7f3d0; color: #065f46; }
.btn-success:hover { background: #d1fae5; }
.pay-channels { display: flex; flex-wrap: wrap; gap: 12px; }
.pay-channels label { display: flex; align-items: center; gap: 6px; font-size: 13px; cursor: pointer; }