/* Set 1 root — light wide hero, 3-column features */
:root {
  --bg: #f5f8fc;
  --paper: #ffffff;
  --ink: #1c2430;
  --muted: #5b6776;
  --line: #d7e0ea;
  --brand: #1764c4;
  --brand-deep: #114a93;
  --ok: #1b7a4a;
  --soft: #e8f1fb;
  --sans: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
}

*,
*::before,
*::after { box-sizing: border-box; }
html { scroll-behavior: auto; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: var(--sans);
  font-size: 16.5px;
  line-height: 1.8;
}
img, svg { max-width: 100%; display: inline-block; vertical-align: middle; }
a { color: var(--brand-deep); }
.site-header {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}
.site-header__inner,
.wrap {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}
.site-header__inner {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
  font-size: 18px;
}
.brand svg { width: 32px; height: 32px; color: var(--brand); }
.site-nav { display: flex; gap: 8px; flex-wrap: wrap; }
.site-nav a {
  text-decoration: none;
  color: var(--ink);
  padding: 8px 12px;
  border-radius: 8px;
}
.site-nav a.is-active {
  background: var(--soft);
  color: var(--brand-deep);
  font-weight: 700;
}
.hero {
  background: linear-gradient(180deg, #eaf2fb 0%, var(--bg) 100%);
  padding: 48px 0 28px;
}
.hero__box {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 36px 40px;
}
.kicker { margin: 0 0 8px; color: var(--brand); font-size: 13px; letter-spacing: 0.08em; }
.hero h1 { margin: 0 0 16px; font-size: 34px; line-height: 1.35; }
.lede, .hero p { margin: 0 0 14px; color: var(--muted); }
.hero .lede { color: var(--ink); font-size: 17.5px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 18px; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--brand);
  color: #fff;
  text-decoration: none;
  padding: 12px 20px;
  border-radius: 10px;
  font-weight: 700;
}
.btn:hover { background: var(--brand-deep); }
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--soft);
  color: var(--brand-deep);
  text-decoration: none;
  padding: 12px 20px;
  border-radius: 10px;
  font-weight: 700;
}
.btn svg, .btn-ghost svg { width: 18px; height: 18px; }
section { padding: 28px 0; }
section h2 { margin: 0 0 14px; font-size: 24px; line-height: 1.4; }
section p { margin: 0 0 12px; }
.feat-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.feat-3 article,
.card,
.review,
.plat {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 18px 16px;
}
.feat-3 h3, .card h3, .plat h3, .review h3 { margin: 8px 0 10px; font-size: 18px; }
.feat-3 svg, .plat svg { width: 28px; height: 28px; color: var(--brand); }
.plat-grid, .cmp, .rev-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
table {
  width: 100%;
  border-collapse: collapse;
  background: var(--paper);
}
th, td {
  border: 1px solid var(--line);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}
th { background: var(--soft); }
.faq details {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 16px;
  margin: 0 0 10px;
}
.faq summary { cursor: pointer; font-weight: 700; }
.faq details p { margin: 10px 0 0; }
.steps { margin: 0; padding-left: 20px; }
.steps li { margin: 0 0 12px; }
.site-footer {
  margin-top: 24px;
  border-top: 1px solid var(--line);
  background: var(--paper);
  padding: 22px 0 28px;
  color: var(--muted);
  font-size: 14px;
}
.site-footer p { margin: 0 0 8px; }
@media (max-width: 900px) {
  .feat-3, .plat-grid, .cmp, .rev-grid { grid-template-columns: 1fr; }
  .hero__box { padding: 24px 20px; }
  .hero h1 { font-size: 28px; }
  .site-header__inner { flex-direction: column; padding: 12px 0; }
}