:root {
  color-scheme: light;
  --ink: #172033;
  --muted: #667085;
  --line: #e4e9f1;
  --soft: #f5f8fc;
  --blue: #1677ff;
  --blue-dark: #0d5dcc;
  --card: #ffffff;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--blue-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; }

.guide-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid rgba(228, 233, 241, .9);
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(14px);
}
.guide-header-inner,
.guide-footer-inner,
.guide-shell,
.guide-index-shell {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}
.guide-header-inner {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.guide-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #101828;
  font-size: 17px;
  font-weight: 800;
}
.guide-brand:hover { text-decoration: none; }
.guide-brand img { width: 34px; height: 34px; border-radius: 9px; }
.guide-nav { display: flex; align-items: center; gap: 22px; font-size: 14px; }

.guide-index-hero {
  padding: 88px 0 74px;
  color: #fff;
  background:
    radial-gradient(circle at 80% 20%, rgba(117, 197, 255, .55), transparent 28%),
    linear-gradient(135deg, #0b54c4, #1684ff 64%, #4eb4ff);
}
.guide-index-hero p { max-width: 680px; margin: 18px 0 0; color: rgba(255, 255, 255, .84); font-size: 18px; }
.guide-eyebrow { margin: 0 0 12px; font-size: 13px; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
.guide-index-hero h1 { max-width: 780px; margin: 0; font-size: clamp(36px, 6vw, 64px); line-height: 1.1; letter-spacing: -.045em; }

.guide-index-main { padding: 64px 0 88px; background: var(--soft); }
.guide-section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 28px; }
.guide-section-head h2 { margin: 0; font-size: 30px; letter-spacing: -.025em; }
.guide-section-head p { margin: 0; color: var(--muted); }
.guide-card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.guide-card {
  min-height: 250px;
  display: flex;
  flex-direction: column;
  padding: 26px;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--card);
  box-shadow: 0 10px 30px rgba(24, 44, 82, .05);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.guide-card:hover { transform: translateY(-4px); border-color: #b9d6ff; box-shadow: 0 18px 36px rgba(24, 91, 175, .11); text-decoration: none; }
.guide-card span { align-self: flex-start; padding: 4px 9px; color: #1264d6; border-radius: 999px; background: #eaf3ff; font-size: 12px; font-weight: 700; }
.guide-card h2 { margin: 24px 0 10px; font-size: 21px; line-height: 1.42; }
.guide-card p { margin: 0 0 24px; color: var(--muted); font-size: 14px; }
.guide-card strong { margin-top: auto; color: var(--blue-dark); font-size: 14px; }

.guide-article-hero { padding: 54px 0 42px; border-bottom: 1px solid var(--line); background: linear-gradient(180deg, #f4f8ff, #fff); }
.guide-breadcrumb { margin-bottom: 20px; color: var(--muted); font-size: 13px; }
.guide-breadcrumb a { color: var(--muted); }
.guide-article-hero h1 { max-width: 820px; margin: 0; color: #101828; font-size: clamp(32px, 5vw, 52px); line-height: 1.18; letter-spacing: -.04em; }
.guide-article-lead { max-width: 800px; margin: 20px 0 0; color: var(--muted); font-size: 18px; }
.guide-meta { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 22px; color: #7a8699; font-size: 13px; }

.guide-shell { display: grid; grid-template-columns: minmax(0, 760px) minmax(220px, 1fr); gap: 62px; padding-top: 54px; padding-bottom: 84px; }
.guide-article { min-width: 0; }
.guide-article h2 { margin: 48px 0 16px; padding-top: 4px; color: #101828; font-size: 27px; line-height: 1.35; letter-spacing: -.02em; }
.guide-article h3 { margin: 30px 0 10px; color: #1d2939; font-size: 20px; }
.guide-article p { margin: 0 0 18px; }
.guide-article ul,
.guide-article ol { margin: 0 0 22px; padding-left: 24px; }
.guide-article li + li { margin-top: 8px; }
.guide-note { margin: 28px 0; padding: 18px 20px; border-left: 4px solid var(--blue); border-radius: 0 12px 12px 0; background: #eff6ff; }
.guide-table-wrap { margin: 26px 0; overflow-x: auto; border: 1px solid var(--line); border-radius: 14px; }
.guide-table { width: 100%; min-width: 600px; border-collapse: collapse; font-size: 14px; }
.guide-table th,
.guide-table td { padding: 14px 16px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.guide-table th { color: #344054; background: #f8fafc; }
.guide-table tr:last-child td { border-bottom: 0; }
.guide-checklist { padding: 22px 24px; border: 1px solid #d8e7fb; border-radius: 16px; background: #f8fbff; }
.guide-checklist h3 { margin-top: 0; }
.guide-aside { align-self: start; position: sticky; top: 96px; }
.guide-aside-card { padding: 22px; border: 1px solid var(--line); border-radius: 16px; background: #fff; }
.guide-aside-card + .guide-aside-card { margin-top: 16px; }
.guide-aside-card h2 { margin: 0 0 14px; font-size: 16px; }
.guide-aside-card a { display: block; padding: 9px 0; border-top: 1px solid #edf0f5; color: #475467; font-size: 13px; }
.guide-aside-card a:first-of-type { border-top: 0; }
.guide-download { color: #fff !important; padding: 12px 14px !important; border: 0 !important; border-radius: 10px; background: var(--blue); text-align: center; font-weight: 700; }
.guide-download + .guide-download { margin-top: 10px; }
.guide-download:hover { background: var(--blue-dark); text-decoration: none; }

.guide-footer { padding: 30px 0; color: #98a2b3; border-top: 1px solid var(--line); background: #fff; font-size: 13px; }
.guide-footer-inner { display: flex; justify-content: space-between; gap: 20px; }
.guide-footer nav { display: flex; gap: 18px; }
.guide-footer a { color: #667085; }

@media (max-width: 860px) {
  .guide-card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .guide-shell { grid-template-columns: 1fr; gap: 38px; }
  .guide-aside { position: static; }
}
@media (max-width: 600px) {
  .guide-header-inner,
  .guide-footer-inner,
  .guide-shell,
  .guide-index-shell { width: min(100% - 28px, 1120px); }
  .guide-header-inner { min-height: 60px; }
  .guide-nav a:first-child { display: none; }
  .guide-index-hero { padding: 64px 0 56px; }
  .guide-index-main { padding: 44px 0 64px; }
  .guide-section-head { align-items: start; flex-direction: column; }
  .guide-card-grid { grid-template-columns: 1fr; }
  .guide-card { min-height: 220px; }
  .guide-article-hero { padding: 38px 0 32px; }
  .guide-shell { padding-top: 34px; padding-bottom: 62px; }
  .guide-article h2 { margin-top: 38px; font-size: 24px; }
  .guide-footer-inner { flex-direction: column; }
}