* { box-sizing: border-box; }
body {
  margin: 0;
  background: #fff;
  color: #222;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
  line-height: 1.7;
}

.ribbon {
  height: 6px;
  background: #cc0000;
}
.em-bar {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  padding: 10px 24px 0;
  border-bottom: 2px solid #cc0000;
}
.em-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #cc0000;
  text-decoration: none;
  font-weight: 700;
  font-size: 20px;
  margin-right: 20px;
  padding-bottom: 10px;
}
.em-links {
  display: flex;
  justify-content: flex-end;
  gap: 0;
}
.em-links a {
  text-decoration: none;
  color: #333;
  padding: 10px 16px 12px;
  border-bottom: 3px solid transparent;
}
.em-links a.is-on {
  color: #cc0000;
  border-bottom-color: #cc0000;
  font-weight: 700;
}

.banner {
  background: linear-gradient(180deg, #cc0000 0%, #9b0008 100%);
  color: #fff;
  padding: 36px 24px 32px;
  text-align: left;
}
.banner-inner { width: min(1100px, 100%); margin: 0 auto; }
.banner h1 { margin: 0 0 12px; font-size: 28px; font-weight: 700; }
.banner p { margin: 0 0 16px; max-width: 720px; }
.red-btn, .white-btn {
  display: inline-block;
  padding: 10px 18px;
  text-decoration: none;
  margin: 0 8px 8px 0;
  font-weight: 700;
}
.red-btn { background: #fff; color: #cc0000; }
.white-btn { border: 1px solid #fff; color: #fff; }
.wrap-main .white-btn { color: #cc0000; border-color: #cc0000; }

.wrap-main {
  width: min(1100px, calc(100% - 32px));
  margin: 24px auto 40px;
}
.trio {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 0 0 22px;
}
.trio article {
  border: 1px solid #ead6d6;
  border-top: 4px solid #cc0000;
  padding: 14px 16px 8px;
  background: #fffdfd;
}
.trio h2 { margin: 0 0 8px; font-size: 18px; color: #cc0000; }
.stack-block {
  border: 1px solid #eee;
  padding: 18px 20px 10px;
  margin: 0 0 18px;
  background: #fafafa;
}
.stack-block h2 {
  margin: 0 0 10px;
  font-size: 20px;
  padding-bottom: 6px;
  border-bottom: 1px dashed #cc0000;
}
dl.feat { display: grid; grid-template-columns: 160px 1fr; gap: 6px 12px; margin: 0 0 12px; }
dl.feat dt { font-weight: 700; color: #8a0006; }
table.feat-table { width: 100%; border-collapse: collapse; margin: 8px 0 14px; font-size: 14px; }
table.feat-table th { background: #cc0000; color: #fff; }
table.feat-table th, table.feat-table td { border: 1px solid #e5b4b4; padding: 7px 8px; }
.qa { margin-bottom: 14px; }
.qa h3 { margin: 0 0 4px; font-size: 16px; }
.base {
  background: #2a2a2a;
  color: #ddd;
  padding: 20px 24px 26px;
  font-size: 13px;
}
.base a { color: #ffd0d0; }

@media (max-width: 860px) {
  .trio, dl.feat { grid-template-columns: 1fr; }
  .em-bar { grid-template-columns: 1fr; }
  .em-links { justify-content: flex-start; flex-wrap: wrap; }
}