:root {
  --bg: #f6f8fb;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #0f766e;
  --primary-dark: #0d5f59;
  --secondary: #4f46e5;
  --secondary-dark: #4338ca;
  --border: #e5e7eb;
  --notice: #9a3412;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}

.wrap {
  max-width: 920px;
  margin: 0 auto;
  padding: 0 16px;
}

.site-header {
  background: linear-gradient(135deg, #0f766e, #14b8a6);
  color: #fff;
  padding: 28px 0;
}

.header-wangjie {
  background: linear-gradient(135deg, #4f46e5, #6366f1);
}

.logo.studio { font-size: 24px; }

.logo-wangjie { background: rgba(255, 255, 255, 0.2); }

.breadcrumb {
  font-size: 13px;
  margin-bottom: 12px;
  opacity: 0.92;
}

.breadcrumb a {
  color: #fff;
  text-decoration: none;
}

.section-title {
  margin: 8px 0 14px;
  font-size: 20px;
}

.product-grid {
  display: grid;
  gap: 16px;
}

@media (min-width: 720px) {
  .product-grid { grid-template-columns: repeat(3, 1fr); }
}

.product-card h3 {
  margin: 8px 0 4px;
  font-size: 22px;
}

.product-fullname {
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 10px;
}

.product-badge {
  display: inline-block;
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: #ecfdf5;
  color: #047857;
  font-weight: 600;
}

.product-card--future .product-badge {
  background: #f3f4f6;
  color: var(--muted);
}

.btn-secondary {
  background: var(--secondary);
}

.btn-secondary:hover { background: var(--secondary-dark); }

.btn-disabled {
  display: inline-block;
  margin-top: 8px;
  padding: 10px 18px;
  background: #e5e7eb;
  color: var(--muted);
  border-radius: 8px;
  font-weight: 600;
}

.muted-box {
  background: #f9fafb;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.18);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: 700;
}

.brand h1 {
  margin: 0;
  font-size: 28px;
}

.subtitle {
  margin: 4px 0 0;
  opacity: 0.92;
  font-size: 14px;
}

main {
  padding: 24px 0 40px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 22px;
  margin-bottom: 16px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

.hero h2 {
  margin-top: 0;
  font-size: 22px;
}

.feature-list {
  margin: 12px 0 0;
  padding-left: 20px;
}

.grid.two-col {
  display: grid;
  gap: 16px;
}

@media (min-width: 720px) {
  .grid.two-col { grid-template-columns: 1fr 1fr; }
}

.btn {
  display: inline-block;
  margin-top: 8px;
  padding: 10px 18px;
  background: var(--primary);
  color: #fff !important;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
}

.btn:hover { background: var(--primary-dark); }

.notice {
  color: var(--notice);
  font-size: 14px;
}

.muted { color: var(--muted); font-size: 14px; }

.link-row a {
  margin-right: 16px;
  color: var(--primary);
  font-weight: 600;
}

.site-footer {
  border-top: 1px solid var(--border);
  background: #fff;
  padding: 20px 0 28px;
  text-align: center;
  font-size: 14px;
}

.site-footer a { color: var(--primary); text-decoration: none; }

.doc-page main { padding-top: 20px; }

.doc-page h1 {
  margin: 0 0 8px;
  font-size: 24px;
}

.doc-meta {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 18px;
}

.doc-page h2 {
  font-size: 18px;
  margin-top: 22px;
}

.doc-page p, .doc-page li { font-size: 15px; }

.back-link {
  display: inline-block;
  margin-bottom: 12px;
  color: var(--primary);
  text-decoration: none;
}

code {
  background: #f3f4f6;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
}