* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: #0f172a;
  color: #f8fafc;
}

.app {
  max-width: 980px;
  margin: 0 auto;
  min-height: 100vh;
  padding: 20px;
}

.page {
  display: none;
  animation: fadeIn 0.35s ease;
}

.page.active {
  display: block;
}

h1,
h2,
h3,
h4 {
  margin-top: 8px;
}

.subtitle {
  color: #94a3b8;
  margin-bottom: 24px;
}

label {
  display: block;
  margin: 14px 0;
  font-size: 14px;
  color: #cbd5e1;
}

input,
textarea {
  width: 100%;
  margin-top: 8px;
  border: 1px solid #334155;
  background: #111827;
  color: #f8fafc;
  border-radius: 10px;
  padding: 12px;
  font-size: 14px;
}

textarea {
  min-height: 80px;
}

.btn {
  width: 100%;
  border: none;
  border-radius: 12px;
  padding: 14px 16px;
  margin-top: 14px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
}

.primary {
  background: linear-gradient(135deg, #f97316, #ef4444);
  color: #fff;
}

.pay {
  background: linear-gradient(135deg, #22c55e, #16a34a);
  color: #fff;
}

.secondary {
  background: #1e293b;
  color: #e2e8f0;
  border: 1px solid #334155;
}

.card {
  background: #111827;
  border: 1px solid #1f2937;
  border-radius: 14px;
  padding: 16px;
  margin: 14px 0;
}

.paid-reason {
  color: #fbbf24;
  font-weight: 600;
}

.upsell-copy {
  background: #0b1220;
  border: 1px dashed #334155;
  border-radius: 10px;
  padding: 10px 12px;
  margin-top: 12px;
}

.upsell-copy p {
  margin: 8px 0;
  color: #facc15;
}

.progress-box {
  height: 12px;
  background: #1e293b;
  border-radius: 999px;
  overflow: hidden;
}

.progress-bar {
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, #06b6d4, #22c55e);
  transition: width 0.2s;
}

.hidden {
  display: none;
}

.wechat-box {
  margin-top: 16px;
  padding: 12px;
  border-radius: 10px;
  background: #0b1220;
  border: 1px dashed #334155;
}

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px;
}

.health-grid .metric-card h4 {
  margin: 0;
  color: #cbd5e1;
}

.export-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 14px;
}

.export-row .btn {
  margin-top: 0;
  text-align: center;
  text-decoration: none;
}

.metric-card p {
  font-size: 24px;
  font-weight: 700;
  margin: 6px 0 0;
  color: #22d3ee;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  text-align: left;
  padding: 10px;
  border-bottom: 1px solid #1f2937;
  font-size: 13px;
  vertical-align: top;
}

pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  color: #cbd5e1;
}

ul {
  padding-left: 20px;
}

li {
  margin: 6px 0;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}