:root {
  --inf-slate: #4B5563;
  --inf-blue: #3B82F6;
  --inf-white: #FFFFFF;
  --inf-ink: #111827;
  --inf-soft: #93C5FD;
  --inf-line: #E5E7EB;
  --inf-mute: #6B7280;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: auto;
}

body.inf-body {
  margin: 0;
  background: var(--inf-white);
  color: var(--inf-slate);
  font-family: Georgia, "Songti SC", "SimSun", "Noto Serif SC", serif;
  line-height: 1.8;
}

.inf-wrap {
  width: min(1040px, calc(100% - 36px));
  margin: 0 auto;
}

.inf-head {
  border-bottom: 1px solid var(--inf-line);
}

.inf-head-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px 18px;
  padding: 18px 0 14px;
}

.inf-brand {
  margin: 0;
  color: var(--inf-ink);
  font-size: 17px;
  font-weight: 700;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

.inf-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
}

.inf-nav a {
  color: var(--inf-blue);
  text-decoration: none;
  font-size: 13px;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

.inf-nav a:hover,
.inf-nav a:focus {
  text-decoration: underline;
}

.inf-hero {
  padding: 32px 0 10px;
}

.inf-hero h1 {
  margin: 0 0 12px;
  color: var(--inf-ink);
  font-size: clamp(26px, 3.6vw, 34px);
  line-height: 1.35;
}

.inf-hero p,
.inf-sec p {
  margin: 0 0 14px;
}

.inf-matrix {
  width: 100%;
  border-collapse: collapse;
  margin: 18px 0 8px;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 14px;
}

.inf-matrix th,
.inf-matrix td {
  border: 1px solid var(--inf-line);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}

.inf-matrix th {
  background: var(--inf-ink);
  color: var(--inf-white);
  font-weight: 600;
}

.inf-matrix td {
  background: var(--inf-white);
}

.inf-matrix tr:nth-child(even) td {
  background: #F8FAFC;
}

.inf-sec ul {
  margin: 0 0 16px;
  padding-left: 1.2em;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 14px;
}

.inf-sec li {
  margin: 0 0 8px;
}

.inf-sec {
  padding: 22px 0 8px;
}

.inf-sec h2 {
  margin: 0 0 12px;
  color: var(--inf-ink);
  font-size: 23px;
}

.inf-deps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 8px 0 16px;
}

.inf-dep {
  padding: 16px 14px 14px;
  border-top: 3px solid var(--inf-blue);
  background: #F9FAFB;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

.inf-dep h3 {
  margin: 8px 0 6px;
  color: var(--inf-ink);
  font-size: 16px;
}

.inf-dep p {
  margin: 0;
  font-size: 14px;
  color: var(--inf-slate);
}

.inf-svg {
  width: 32px;
  height: 32px;
  display: block;
}

.inf-steps {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  counter-reset: infstep;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

.inf-steps li {
  position: relative;
  padding: 12px 12px 12px 56px;
  margin-bottom: 8px;
  border: 1px solid var(--inf-line);
}

.inf-steps li::before {
  counter-increment: infstep;
  content: counter(infstep);
  position: absolute;
  left: 12px;
  top: 14px;
  width: 28px;
  height: 28px;
  background: var(--inf-blue);
  color: var(--inf-white);
  text-align: center;
  line-height: 28px;
  font-size: 13px;
  font-weight: 700;
}

.inf-steps h3 {
  margin: 0 0 4px;
  color: var(--inf-ink);
  font-size: 16px;
}

.inf-steps p {
  margin: 0;
  font-size: 14px;
}

.inf-dual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin-top: 12px;
  border: 1px solid var(--inf-line);
}

.inf-dual article {
  padding: 16px 18px;
}

.inf-dual article:first-child {
  border-right: 1px solid var(--inf-soft);
  background: #EFF6FF;
}

.inf-dual article:last-child {
  background: #F9FAFB;
}

.inf-dual h3 {
  margin: 0 0 8px;
  color: var(--inf-ink);
  font-size: 18px;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

.inf-faq {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
}

.inf-faq li {
  padding: 14px 0 16px;
  border-bottom: 1px solid var(--inf-line);
}

.inf-faq h3 {
  margin: 0 0 8px;
  color: var(--inf-ink);
  font-size: 17px;
}

.inf-faq p {
  margin: 0;
  font-size: 15px;
}

.inf-foot {
  margin-top: 28px;
  padding: 20px 0 26px;
  border-top: 4px solid var(--inf-blue);
  color: var(--inf-mute);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 13px;
}

.inf-foot p {
  margin: 0 0 6px;
}

@media (max-width: 860px) {
  .inf-deps,
  .inf-dual {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 620px) {
  .inf-deps,
  .inf-dual {
    grid-template-columns: 1fr;
  }

  .inf-dual article:first-child {
    border-right: 0;
    border-bottom: 1px solid var(--inf-soft);
  }
}