/* Layout for the short support pages. Marketing pages keep inline CSS. */
:root {
  --bg: #f6f8fb;
  --card: #ffffff;
  --text: #1a2332;
  --muted: #5a6a7e;
  --line: #e2e8f0;
  --accent: #0b5fff;
  --accent-soft: #e8f0ff;
  --ok: #0d7a4f;
  --promo: #0d7a4f;
  --promo-soft: #e6f7ef;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 8px 24px rgba(16, 24, 40, 0.06);
  --max: 960px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  font-size: 16px;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }
header {
  background: var(--card);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 20;
}
.nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 0;
}
.brand {
  font-weight: 700;
  color: var(--text);
  font-size: 15px;
  letter-spacing: 0.02em;
}
.brand span { color: var(--muted); font-weight: 500; }
.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  font-size: 13px;
}
.nav-links a { color: var(--muted); }
.nav-links a:hover { color: var(--accent); }
.cta-btn {
  display: inline-block;
  background: var(--accent);
  color: #fff !important;
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none !important;
  white-space: nowrap;
}
.cta-btn.ghost {
  background: transparent;
  color: var(--accent) !important;
  border: 1px solid var(--accent);
}
.hero { padding: 36px 0 12px; }
.badge {
  display: inline-block;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 14px;
}
h1 {
  font-size: clamp(1.45rem, 4vw, 1.9rem);
  line-height: 1.35;
  margin: 0 0 14px;
  font-weight: 750;
  letter-spacing: -0.02em;
}
.lead {
  color: var(--muted);
  font-size: 1.02rem;
  margin: 0 0 18px;
  max-width: 46em;
}
.crumbs {
  font-size: 13px;
  color: var(--muted);
  margin: 0 0 14px;
}
.crumbs a { color: var(--muted); }
section { padding: 22px 0; }
section h2 {
  font-size: 1.25rem;
  margin: 0 0 8px;
}
.section-intro {
  color: var(--muted);
  margin: 0 0 16px;
  font-size: 0.98rem;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px 22px;
}
.grid { display: grid; gap: 14px; }
@media (min-width: 640px) {
  .grid-2 { grid-template-columns: 1fr 1fr; }
}
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  min-width: 520px;
}
th, td {
  text-align: left;
  padding: 12px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th { background: #f1f5f9; font-weight: 600; white-space: nowrap; }
tr:last-child td { border-bottom: none; }
td.num { font-variant-numeric: tabular-nums; font-weight: 600; }
td.promo, th.promo { background: var(--promo-soft); color: var(--promo); }
td.promo { font-weight: 700; }
.table-note, .note { margin-top: 12px; font-size: 13px; color: var(--muted); }
.faq details {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px 16px;
  margin-bottom: 10px;
}
.faq summary { cursor: pointer; font-weight: 600; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; float: right; color: var(--muted); font-weight: 400; }
.faq details[open] summary::after { content: "−"; }
.faq details p { margin: 10px 0 0; color: var(--muted); font-size: 0.95rem; }
.cta-band {
  background: linear-gradient(160deg, #0b5fff 0%, #1a3a8f 100%);
  color: #fff;
  border-radius: var(--radius);
  padding: 28px 24px;
}
.cta-band h2 { color: #fff; margin: 0 0 8px; }
.cta-band p { color: rgba(255,255,255,0.9); margin: 0 0 14px; }
.cta-band .wx-id { font-size: 1.35rem; }
footer {
  padding: 28px 0 40px;
  border-top: 1px solid var(--line);
  margin-top: 12px;
}
footer p { margin: 0 0 8px; font-size: 13px; color: var(--muted); }
.disclaimer { font-size: 12px; color: #7a8a9c; margin-top: 16px; line-height: 1.55; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 8px; }