:root {
  --ink: #0c4a6e;
  --text: #12202b;
  --sky: #e0f2fe;
  --line: #7dd3fc;
  --paper: #f0f9ff;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font-family: Verdana, "Microsoft YaHei", "PingFang SC", sans-serif;
  font-size: 16px;
  line-height: 1.8;
}
a { color: #0369a1; }
.top {
  background: #fff;
  border-bottom: 4px double var(--line);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  padding: 14px 6vw;
}
.brand { color: var(--ink); text-decoration: none; font-weight: 700; display: inline-flex; gap: 8px; align-items: center; }
.top nav { display: flex; flex-wrap: wrap; gap: 8px 14px; font-size: 13px; }
.top nav a { text-decoration: none; }
.hero { padding: 28px 6vw 8px; max-width: 1080px; }
h1 { font-size: 30px; line-height: 1.35; margin: 0 0 12px; color: var(--ink); }
.kicker { margin: 0 0 6px; font-size: 12px; letter-spacing: 0.16em; color: #0369a1; }
.ask { font-size: 18px; color: var(--ink); }
.plat { font-size: 14px; }
.jumps { display: flex; flex-wrap: wrap; gap: 8px 12px; font-size: 14px; }
.dl { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0; }
.btn { display: inline-block; background: var(--ink); color: #fff; text-decoration: none; padding: 8px 12px; font-size: 14px; }
.btn.line { background: #fff; color: var(--ink); border: 1px solid var(--ink); }
main { padding: 0 0 20px; }
.block { padding: 26px 6vw; border-top: 1px solid #bae6fd; background: #fff; }
.block.tint { background: var(--sky); }
.grid { max-width: 1000px; display: grid; grid-template-columns: 1fr 240px; gap: 22px; align-items: start; }
h2 { font-size: 26px; line-height: 1.4; margin: 0 0 10px; color: var(--ink); font-weight: 700; }
.side { background: #fff; border-left: 4px solid var(--line); padding: 8px 10px; font-size: 14px; }
.block.tint .side { background: #f0f9ff; }
p { margin: 0 0 12px; }
ul, ol { margin: 0 0 12px; padding-left: 1.2em; }
li { margin: 0 0 6px; }
.cols { column-count: 2; column-gap: 28px; }
.cols p { break-inside: avoid; }
table { width: 100%; border-collapse: collapse; font-size: 14px; margin: 0 0 12px; }
th, td { border-bottom: 1px solid #bae6fd; text-align: left; vertical-align: top; padding: 8px; }
.qa h3 { font-size: 16px; margin: 14px 0 6px; color: var(--ink); }
.foot { background: var(--ink); color: #e0f2fe; padding: 20px 6vw 30px; font-size: 13px; line-height: 1.7; }
.foot p { margin: 0 0 8px; }
@media (max-width: 860px) {
  .grid, .cols { display: block; column-count: 1; }
  h1 { font-size: 24px; }
  .top { flex-direction: column; align-items: flex-start; }
}