/* Tencent Cloud macOS Glass Theme */
:root {
  --tc-blue: #0052d9;
  --tc-blue-hover: #003cab;
  --tc-blue-soft: rgba(0, 82, 217, 0.12);
  --tc-text: #1f2329;
  --tc-text-secondary: #646a73;
  --tc-text-muted: #8f959e;
  --tc-border: rgba(255, 255, 255, 0.65);
  --tc-border-subtle: rgba(0, 0, 0, 0.06);
  --tc-glass: rgba(255, 255, 255, 0.72);
  --tc-glass-strong: rgba(255, 255, 255, 0.88);
  --tc-glass-dark: rgba(28, 31, 35, 0.78);
  --tc-blur: blur(24px) saturate(180%);
  --tc-radius: 14px;
  --tc-radius-sm: 10px;
  --tc-shadow: 0 8px 32px rgba(15, 23, 42, 0.08);
  --tc-shadow-lg: 0 16px 48px rgba(15, 23, 42, 0.12);
  --tc-font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
  --tc-nav-h: 56px;
  --tc-sidebar-w: 240px;
  --tc-ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--tc-font);
  color: var(--tc-text);
  background: #eef1f6;
  overflow-x: hidden;
}

.tc-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 80% 60% at 10% 10%, rgba(0, 82, 217, 0.08), transparent 50%),
    radial-gradient(ellipse 70% 50% at 90% 20%, rgba(99, 102, 241, 0.06), transparent 45%),
    linear-gradient(165deg, #f5f7fb 0%, #e8ecf3 45%, #eef1f6 100%);
}

.tc-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.55;
  animation: tc-float 18s ease-in-out infinite;
}

.tc-orb-1 { width: 420px; height: 420px; background: rgba(0, 82, 217, 0.15); top: -8%; left: -5%; }
.tc-orb-2 { width: 360px; height: 360px; background: rgba(147, 197, 253, 0.2); top: 40%; right: -8%; animation-delay: -6s; }
.tc-orb-3 { width: 280px; height: 280px; background: rgba(199, 210, 254, 0.25); bottom: -5%; left: 35%; animation-delay: -12s; }

@keyframes tc-float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(24px, -18px) scale(1.04); }
  66% { transform: translate(-16px, 12px) scale(0.96); }
}

.tc-app { min-height: 100vh; display: flex; flex-direction: column; }

/* SVG Icons */
.ui-icon {
  width: 1.125em;
  height: 1.125em;
  display: inline-block;
  vertical-align: -0.15em;
  flex-shrink: 0;
}

.ui-icon-lg { width: 1.75em; height: 1.75em; }
.ui-icon-xl { width: 3.5rem; height: 3.5rem; stroke-width: 1.5; }

/* Glass surfaces */
.tc-glass,
.card,
.modal-content {
  background: var(--tc-glass) !important;
  backdrop-filter: var(--tc-blur);
  -webkit-backdrop-filter: var(--tc-blur);
  border: 1px solid var(--tc-border) !important;
  border-radius: var(--tc-radius) !important;
  box-shadow: var(--tc-shadow);
}

.card { overflow: hidden; }
.card-header { background: rgba(255,255,255,0.35) !important; border-bottom-color: var(--tc-border-subtle) !important; }
.card-footer { background: rgba(255,255,255,0.25) !important; border-top-color: var(--tc-border-subtle) !important; }

.tc-panel {
  background: var(--tc-glass);
  backdrop-filter: var(--tc-blur);
  -webkit-backdrop-filter: var(--tc-blur);
  border: 1px solid var(--tc-border);
  border-radius: var(--tc-radius);
  box-shadow: var(--tc-shadow);
  padding: 1.25rem;
}

.tc-panel-inner {
  background: rgba(255,255,255,0.45);
  border: 1px solid var(--tc-border-subtle);
  border-radius: var(--tc-radius-sm);
  padding: 1rem;
}

/* Navbar */
.tc-nav {
  position: sticky;
  top: 0;
  z-index: 1030;
  height: var(--tc-nav-h);
  background: var(--tc-glass-strong) !important;
  backdrop-filter: var(--tc-blur);
  -webkit-backdrop-filter: var(--tc-blur);
  border-bottom: 1px solid var(--tc-border-subtle);
  box-shadow: 0 1px 0 rgba(255,255,255,0.6) inset, 0 4px 24px rgba(15,23,42,0.04);
}

.tc-nav .container,
.tc-nav .container-fluid {
  height: 100%;
  display: flex;
  align-items: center;
}

.tc-nav-brand {
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: -0.02em;
  color: var(--tc-text) !important;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.tc-nav-brand:hover { color: var(--tc-blue) !important; }

.tc-nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin-left: auto;
}

.tc-nav-link {
  color: var(--tc-text-secondary) !important;
  text-decoration: none;
  font-size: 0.875rem;
  padding: 0.45rem 0.85rem;
  border-radius: 8px;
  transition: background 0.2s var(--tc-ease), color 0.2s;
}

.tc-nav-link:hover {
  background: var(--tc-blue-soft);
  color: var(--tc-blue) !important;
}

.tc-nav-user {
  font-size: 0.8125rem;
  color: var(--tc-text-muted);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-right: 0.5rem;
}

.tc-badge {
  display: inline-block;
  font-size: 0.6875rem;
  padding: 0.15rem 0.45rem;
  border-radius: 6px;
  background: rgba(255, 193, 7, 0.2);
  color: #92600d;
  font-weight: 500;
}

.tc-nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--tc-border-subtle);
  border-radius: 8px;
  padding: 0.35rem 0.5rem;
  margin-left: auto;
  cursor: pointer;
  color: var(--tc-text);
}

/* Main layout */
.tc-main { flex: 1; padding: 1.5rem 0 2rem; }
.tc-container { width: min(1140px, calc(100% - 2rem)); margin: 0 auto; }
.tc-container-wide { width: min(1400px, calc(100% - 2rem)); margin: 0 auto; }

.tc-page-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.tc-page-title {
  font-size: 1.375rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tc-page-sub { color: var(--tc-text-muted); font-size: 0.875rem; margin: 0; }

/* Admin shell */
.tc-admin-shell {
  display: grid;
  grid-template-columns: var(--tc-sidebar-w) 1fr;
  min-height: calc(100vh - var(--tc-nav-h));
}

.tc-sidebar {
  background: var(--tc-glass-dark);
  backdrop-filter: var(--tc-blur);
  -webkit-backdrop-filter: var(--tc-blur);
  border-right: 1px solid rgba(255,255,255,0.06);
  padding: 1rem 0.75rem;
  overflow-y: auto;
}

.tc-sidebar-title {
  color: rgba(255,255,255,0.35);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.75rem 0.75rem 0.35rem;
}

.tc-sidebar a {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  color: rgba(255,255,255,0.72);
  text-decoration: none;
  font-size: 0.875rem;
  padding: 0.55rem 0.75rem;
  border-radius: 8px;
  margin-bottom: 2px;
  transition: background 0.2s, color 0.2s;
}

.tc-sidebar a:hover {
  background: rgba(255,255,255,0.08);
  color: #fff;
}

.tc-sidebar a.active {
  background: var(--tc-blue);
  color: #fff;
  box-shadow: 0 4px 12px rgba(0, 82, 217, 0.35);
}

.tc-admin-main {
  padding: 1.25rem 1.5rem 2rem;
  overflow-x: auto;
}

/* User sidebar layout */
.tc-user-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 1.25rem;
  align-items: start;
}

.tc-user-sidebar {
  background: var(--tc-glass);
  backdrop-filter: var(--tc-blur);
  -webkit-backdrop-filter: var(--tc-blur);
  border: 1px solid var(--tc-border);
  border-radius: var(--tc-radius);
  box-shadow: var(--tc-shadow);
  padding: 0.75rem;
  position: sticky;
  top: calc(var(--tc-nav-h) + 1rem);
}

.tc-user-sidebar a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--tc-text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  padding: 0.55rem 0.75rem;
  border-radius: 8px;
  transition: background 0.2s, color 0.2s;
}

.tc-user-sidebar a:hover { background: var(--tc-blue-soft); color: var(--tc-blue); }
.tc-user-sidebar a.active { background: var(--tc-blue); color: #fff; }

/* Buttons */
.btn {
  border-radius: var(--tc-radius-sm) !important;
  font-weight: 500;
  font-size: 0.875rem;
  padding: 0.5rem 1rem;
  transition: transform 0.2s var(--tc-ease), box-shadow 0.2s, background 0.2s;
}

.btn:active { transform: scale(0.98); }

.btn-primary {
  background: var(--tc-blue) !important;
  border-color: var(--tc-blue) !important;
  box-shadow: 0 2px 8px rgba(0, 82, 217, 0.25);
}

.btn-primary:hover {
  background: var(--tc-blue-hover) !important;
  border-color: var(--tc-blue-hover) !important;
  box-shadow: 0 4px 16px rgba(0, 82, 217, 0.3);
}

.btn-outline-primary {
  color: var(--tc-blue) !important;
  border-color: rgba(0, 82, 217, 0.35) !important;
  background: rgba(255,255,255,0.5) !important;
}

.btn-outline-primary:hover {
  background: var(--tc-blue-soft) !important;
  border-color: var(--tc-blue) !important;
}

.btn-outline-secondary,
.btn-outline-light {
  background: rgba(255,255,255,0.45) !important;
  border-color: var(--tc-border-subtle) !important;
}

.btn-dark, .btn-secondary {
  background: rgba(31, 35, 41, 0.88) !important;
  border-color: transparent !important;
}

.btn-success {
  box-shadow: 0 2px 8px rgba(25, 135, 84, 0.2);
}

/* Forms */
.form-control, .form-select {
  border-radius: var(--tc-radius-sm) !important;
  border-color: var(--tc-border-subtle) !important;
  background: rgba(255,255,255,0.65) !important;
  font-size: 0.875rem;
  padding: 0.55rem 0.85rem;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}

.form-control:focus, .form-select:focus {
  border-color: rgba(0, 82, 217, 0.45) !important;
  box-shadow: 0 0 0 3px rgba(0, 82, 217, 0.12) !important;
  background: rgba(255,255,255,0.9) !important;
}

.form-label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--tc-text-secondary);
  margin-bottom: 0.35rem;
}

.input-group .form-control { border-radius: var(--tc-radius-sm) 0 0 var(--tc-radius-sm) !important; }

/* Tables */
.table {
  --bs-table-bg: transparent;
  font-size: 0.875rem;
}

.table thead th {
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--tc-text-muted);
  border-bottom-color: var(--tc-border-subtle) !important;
  background: rgba(255,255,255,0.3);
}

.table td, .table th { vertical-align: middle; border-color: var(--tc-border-subtle) !important; }
.table-hover tbody tr:hover { background: rgba(0, 82, 217, 0.04) !important; }

.table-responsive {
  border-radius: var(--tc-radius-sm);
  border: 1px solid var(--tc-border-subtle);
  background: rgba(255,255,255,0.35);
}

/* Alerts */
.alert {
  border-radius: var(--tc-radius-sm) !important;
  border: 1px solid transparent !important;
  font-size: 0.875rem;
  backdrop-filter: blur(12px);
}

.alert-danger { background: rgba(254, 226, 226, 0.85) !important; border-color: rgba(239, 68, 68, 0.2) !important; color: #991b1b !important; }
.alert-success { background: rgba(220, 252, 231, 0.85) !important; border-color: rgba(34, 197, 94, 0.2) !important; color: #166534 !important; }
.alert-info { background: rgba(219, 234, 254, 0.85) !important; border-color: rgba(59, 130, 246, 0.2) !important; color: #1e40af !important; }
.alert-warning { background: rgba(254, 249, 195, 0.85) !important; border-color: rgba(234, 179, 8, 0.25) !important; color: #854d0e !important; }

/* Badges */
.badge {
  font-weight: 500;
  border-radius: 6px;
  padding: 0.3em 0.55em;
}

.bg-primary, .badge.bg-primary { background: var(--tc-blue) !important; }
.bg-secondary { background: rgba(100, 106, 115, 0.85) !important; }

/* Stat cards */
.card-stat, .stat-card {
  border: none !important;
  transition: transform 0.3s var(--tc-ease), box-shadow 0.3s;
}

.card-stat:hover, .stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--tc-shadow-lg) !important;
}

.card-stat .icon, .stat-card .icon {
  font-size: 2rem;
  opacity: 0.75;
  color: var(--tc-blue);
}

.card-stat.bg-primary, .card-stat.bg-success, .card-stat.bg-info, .card-stat.bg-secondary,
.stat-card.bg-primary, .stat-card.bg-success, .stat-card.bg-info, .stat-card.bg-secondary {
  background: var(--tc-glass) !important;
  color: var(--tc-text) !important;
}

.card-stat .display-6, .stat-card .display-6 { font-size: 1.75rem; font-weight: 700; letter-spacing: -0.03em; }
.card-stat .text-uppercase.small, .stat-card .text-uppercase.small { color: var(--tc-text-muted); font-size: 0.6875rem; letter-spacing: 0.06em; }

.tc-stat-accent-primary .icon { color: var(--tc-blue); }
.tc-stat-accent-success .icon { color: #16a34a; }
.tc-stat-accent-info .icon { color: #0891b2; }
.tc-stat-accent-muted .icon { color: var(--tc-text-muted); }

/* Auth / login standalone */
.tc-auth-wrap {
  min-height: calc(100vh - var(--tc-nav-h));
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
}

.tc-auth-card {
  width: min(420px, 100%);
  background: var(--tc-glass-strong);
  backdrop-filter: var(--tc-blur);
  -webkit-backdrop-filter: var(--tc-blur);
  border: 1px solid var(--tc-border);
  border-radius: calc(var(--tc-radius) + 2px);
  box-shadow: var(--tc-shadow-lg);
  padding: 2rem;
}

.tc-auth-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.ui-icon-xl.text-success { color: #16a34a; stroke: #16a34a; }
.ui-icon-xl.text-danger { color: #dc2626; stroke: #dc2626; }

.tc-auth-standalone {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
}

/* ========== Landing page ========== */
.tc-nav-landing .tc-container {
  width: min(1200px, calc(100% - 2rem));
  margin: 0 auto;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1rem;
  height: var(--tc-nav-h);
}

.tc-nav-center {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.15rem;
}

.tc-nav-center .tc-nav-link {
  font-size: 0.8125rem;
  padding: 0.4rem 0.75rem;
}

.tc-nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tc-nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 0.45rem 1rem;
  border-radius: 8px;
  text-decoration: none;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
}

.tc-nav-btn-ghost {
  color: var(--tc-text-secondary);
  background: transparent;
}

.tc-nav-btn-ghost:hover {
  background: var(--tc-blue-soft);
  color: var(--tc-blue);
}

.tc-nav-btn-primary {
  color: #fff;
  background: var(--tc-blue);
  box-shadow: 0 2px 8px rgba(0, 82, 217, 0.28);
}

.tc-nav-btn-primary:hover {
  background: var(--tc-blue-hover);
  color: #fff;
}

.tc-nav.scrolled {
  background: rgba(255, 255, 255, 0.92) !important;
  box-shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
}

.tc-hero-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.tc-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--tc-text-secondary);
  background: rgba(255, 255, 255, 0.65);
  border: 1px solid var(--tc-border-subtle);
  border-radius: 999px;
  padding: 0.35rem 0.85rem;
  backdrop-filter: blur(8px);
}

.tc-hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

.tc-section {
  padding: 3.5rem 0;
}

.tc-section-alt {
  background: rgba(255, 255, 255, 0.35);
  border-top: 1px solid var(--tc-border-subtle);
  border-bottom: 1px solid var(--tc-border-subtle);
}

.tc-section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 2.5rem;
}

.tc-section-head h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  margin-bottom: 0.65rem;
}

.tc-section-head p {
  color: var(--tc-text-muted);
  font-size: 0.9375rem;
  margin: 0;
  line-height: 1.6;
}

.tc-stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-top: 2.5rem;
}

.tc-stat-item {
  text-align: center;
  padding: 1.25rem 0.75rem;
  background: var(--tc-glass);
  backdrop-filter: var(--tc-blur);
  border: 1px solid var(--tc-border);
  border-radius: var(--tc-radius);
  box-shadow: var(--tc-shadow);
}

.tc-stat-num {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--tc-blue);
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.tc-stat-label {
  font-size: 0.8125rem;
  color: var(--tc-text-muted);
  margin-top: 0.25rem;
}

.tc-feature-grid-6 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.tc-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  counter-reset: tc-step;
}

.tc-step {
  position: relative;
  padding: 1.5rem;
  background: var(--tc-glass);
  backdrop-filter: var(--tc-blur);
  border: 1px solid var(--tc-border);
  border-radius: var(--tc-radius);
  box-shadow: var(--tc-shadow);
}

.tc-step-num {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--tc-blue);
  color: #fff;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: 8px;
  margin-bottom: 1rem;
}

.tc-step h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.tc-step p {
  font-size: 0.875rem;
  color: var(--tc-text-muted);
  margin: 0;
  line-height: 1.55;
}

.tc-product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.tc-product-card {
  display: flex;
  flex-direction: column;
  background: var(--tc-glass);
  backdrop-filter: var(--tc-blur);
  border: 1px solid var(--tc-border);
  border-radius: var(--tc-radius);
  box-shadow: var(--tc-shadow);
  padding: 1.5rem;
  height: 100%;
  transition: transform 0.3s var(--tc-ease), box-shadow 0.3s;
}

.tc-product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--tc-shadow-lg);
}

.tc-product-card h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.tc-product-card p {
  font-size: 0.875rem;
  color: var(--tc-text-muted);
  flex: 1;
  margin-bottom: 1rem;
  line-height: 1.55;
}

.tc-product-price {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--tc-blue);
  margin-bottom: 0.75rem;
}

.tc-api-box {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
}

.tc-api-list {
  list-style: none;
  padding: 0;
  margin: 1.25rem 0 0;
}

.tc-api-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: 0.875rem;
  color: var(--tc-text-secondary);
  padding: 0.5rem 0;
}

.tc-api-list .ui-icon {
  color: var(--tc-blue);
  margin-top: 0.15rem;
}

.tc-code-block {
  background: rgba(28, 31, 35, 0.88);
  backdrop-filter: blur(12px);
  border-radius: var(--tc-radius);
  padding: 1.25rem;
  overflow-x: auto;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.75rem;
  line-height: 1.6;
  color: #e5e7eb;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--tc-shadow-lg);
}

.tc-code-block .c-muted { color: #6b7280; }
.tc-code-block .c-key { color: #93c5fd; }
.tc-code-block .c-str { color: #86efac; }
.tc-code-block .c-num { color: #fcd34d; }

.tc-cta-banner {
  text-align: center;
  padding: 3rem 2rem;
  background: linear-gradient(135deg, rgba(0, 82, 217, 0.08) 0%, rgba(99, 102, 241, 0.06) 100%);
  border: 1px solid rgba(0, 82, 217, 0.12);
  border-radius: calc(var(--tc-radius) + 4px);
  backdrop-filter: var(--tc-blur);
}

.tc-cta-banner h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.65rem;
}

.tc-cta-banner p {
  color: var(--tc-text-muted);
  margin-bottom: 1.5rem;
}

/* Landing footer */
.tc-footer-rich {
  margin-top: auto;
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(16px);
  border-top: 1px solid var(--tc-border-subtle);
}

.tc-footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
  padding: 3rem 0 2rem;
}

.tc-footer-brand p {
  font-size: 0.875rem;
  color: var(--tc-text-muted);
  line-height: 1.6;
  margin: 0.75rem 0 0;
  max-width: 280px;
}

.tc-footer-col h4 {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--tc-text-secondary);
  margin-bottom: 1rem;
}

.tc-footer-col a {
  display: block;
  font-size: 0.875rem;
  color: var(--tc-text-muted);
  text-decoration: none;
  padding: 0.3rem 0;
  transition: color 0.2s;
}

.tc-footer-col a:hover {
  color: var(--tc-blue);
}

.tc-footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 0;
  border-top: 1px solid var(--tc-border-subtle);
  font-size: 0.8125rem;
  color: var(--tc-text-muted);
}

.tc-footer-bottom a {
  color: var(--tc-text-muted);
  text-decoration: none;
}

.tc-footer-bottom a:hover {
  color: var(--tc-blue);
}

.tc-nav-mobile-backdrop {
  display: none;
  position: fixed;
  inset: var(--tc-nav-h) 0 0 0;
  background: rgba(15, 23, 42, 0.35);
  backdrop-filter: blur(4px);
  z-index: 1020;
}

.tc-nav-mobile-backdrop.tc-show { display: block; }

.tc-nav-mobile-panel {
  display: none !important;
  position: fixed;
  top: var(--tc-nav-h);
  left: 0;
  right: 0;
  background: var(--tc-glass-strong);
  backdrop-filter: var(--tc-blur);
  border-bottom: 1px solid var(--tc-border-subtle);
  padding: 1rem;
  z-index: 1025;
  box-shadow: var(--tc-shadow-lg);
}

.tc-nav-mobile-panel.tc-open { display: block !important; }

.tc-nav-mobile-panel a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 0.75rem;
  color: var(--tc-text-secondary);
  text-decoration: none;
  font-size: 0.9375rem;
  border-radius: 8px;
}

.tc-nav-mobile-panel a:hover {
  background: var(--tc-blue-soft);
  color: var(--tc-blue);
}

.tc-nav-mobile-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--tc-border-subtle);
}

.tc-nav-mobile-actions .tc-nav-btn { flex: 1; justify-content: center; }

/* Landing hero */
.tc-hero {
  padding: 4.5rem 0 3rem;
  text-align: center;
}

.tc-hero-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--tc-text);
  margin-bottom: 0.75rem;
}

.tc-hero-lead {
  font-size: 1.0625rem;
  color: var(--tc-text-secondary);
  max-width: 520px;
  margin: 0 auto 1.75rem;
  line-height: 1.6;
}

.tc-feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-top: 2rem;
}

.tc-feature-card {
  background: var(--tc-glass);
  backdrop-filter: var(--tc-blur);
  -webkit-backdrop-filter: var(--tc-blur);
  border: 1px solid var(--tc-border);
  border-radius: var(--tc-radius);
  box-shadow: var(--tc-shadow);
  padding: 1.75rem 1.25rem;
  text-align: center;
  transition: transform 0.35s var(--tc-ease), box-shadow 0.35s;
}

.tc-feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--tc-shadow-lg);
}

.tc-feature-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--tc-blue-soft);
  border-radius: 12px;
  color: var(--tc-blue);
}

.tc-feature-icon .ui-icon { width: 24px; height: 24px; }

.tc-feature-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--tc-text);
}

.tc-feature-card p {
  font-size: 0.875rem;
  color: var(--tc-text-muted);
  margin: 0;
  line-height: 1.55;
}

/* Footer */
.tc-footer {
  text-align: center;
  padding: 1.5rem;
  color: var(--tc-text-muted);
  font-size: 0.8125rem;
  border-top: 1px solid var(--tc-border-subtle);
  background: rgba(255,255,255,0.35);
  backdrop-filter: blur(12px);
}

/* GSAP：默认可见，避免 JS/CDN 异常时整页空白 */
[data-tc-animate] { opacity: 1; transform: none; }
html.tc-js-animate [data-tc-animate].tc-will-animate { opacity: 0; }

/* Shop version tiles */
.border.rounded {
  background: rgba(255,255,255,0.45) !important;
  border-color: var(--tc-border-subtle) !important;
  border-radius: var(--tc-radius-sm) !important;
}

.border-success { border-color: rgba(34, 197, 94, 0.35) !important; background: rgba(220, 252, 231, 0.35) !important; }

/* Modal */
.modal-content {
  box-shadow: var(--tc-shadow-lg) !important;
}

/* Text utilities override */
.text-muted { color: var(--tc-text-muted) !important; }
.text-primary { color: var(--tc-blue) !important; }
.text-secondary { color: var(--tc-text-secondary) !important; }

h1, h2, h3, h4, h5, h6 { letter-spacing: -0.02em; }

/* Responsive */
@media (max-width: 991.98px) {
  .tc-admin-shell { grid-template-columns: 1fr; }
  .tc-sidebar {
    position: fixed;
    top: var(--tc-nav-h);
    left: 0;
    bottom: 0;
    width: min(var(--tc-sidebar-w), 85vw);
    z-index: 1025;
    transform: translateX(-105%);
    transition: transform 0.35s var(--tc-ease);
    box-shadow: var(--tc-shadow-lg);
  }
  .tc-sidebar.tc-open { transform: translateX(0); }
  .tc-sidebar-backdrop {
    display: none;
    position: fixed;
    inset: var(--tc-nav-h) 0 0 0;
    background: rgba(15, 23, 42, 0.35);
    backdrop-filter: blur(4px);
    z-index: 1020;
  }
  .tc-sidebar-backdrop.tc-show { display: block; }
  .tc-nav-toggle { display: inline-flex; align-items: center; }
  .tc-user-layout { grid-template-columns: 1fr; }
  .tc-user-sidebar {
    position: static;
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
    padding: 0.5rem;
  }
  .tc-user-sidebar a { flex: 1 1 auto; justify-content: center; min-width: calc(50% - 0.25rem); }
  .tc-feature-grid { grid-template-columns: 1fr; }
  .tc-feature-grid-6 { grid-template-columns: 1fr; }
  .tc-stats-row { grid-template-columns: repeat(2, 1fr); }
  .tc-steps { grid-template-columns: 1fr; }
  .tc-product-grid { grid-template-columns: 1fr; }
  .tc-api-box { grid-template-columns: 1fr; }
  .tc-footer-grid { grid-template-columns: 1fr 1fr; gap: 1.5rem; }
  .tc-nav-landing .tc-container { grid-template-columns: 1fr auto; }
  .tc-nav-center { display: none; }
  .tc-nav-actions .tc-nav-btn-ghost { display: none; }
  .tc-nav-toggle { display: inline-flex; align-items: center; margin-left: 0; }
}

@media (max-width: 575.98px) {
  .tc-main { padding: 1rem 0 1.5rem; }
  .tc-container, .tc-container-wide { width: calc(100% - 1.25rem); }
  .tc-admin-main { padding: 1rem; }
  .tc-page-header { flex-direction: column; align-items: flex-start; }
  .tc-stats-row { grid-template-columns: 1fr 1fr; }
  .tc-footer-grid { grid-template-columns: 1fr; }
  .tc-footer-bottom { flex-direction: column; text-align: center; }
  .tc-hero { padding: 3rem 0 2rem; }
  .tc-section { padding: 2.5rem 0; }
}

@media (prefers-reduced-motion: reduce) {
  *, .tc-orb { animation: none !important; transition: none !important; }
  [data-tc-animate] { opacity: 1 !important; transform: none !important; }
}