/* 第1套 根域名 · 浅色宽 Hero · 主下载置顶 · 功能三栏 */
:root {
  --red: #c8161d;
  --red-deep: #9e1016;
  --ink: #1c1f24;
  --muted: #5c6570;
  --bg: #f7f8fa;
  --card: #ffffff;
  --line: #e4e8ee;
  --max: 1140px;
  --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;
}
a { color: var(--red-deep); }
svg { display: inline-block; vertical-align: middle; }
.bar {
  position: sticky; top: 0; z-index: 20;
  background: #fff;
  border-bottom: 1px solid var(--line);
}
.bar__in {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
  min-height: 68px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  color: var(--ink); text-decoration: none; font-weight: 800; font-size: 20px;
}
.brand svg { width: 30px; height: 30px; color: var(--red); }
.nav { display: flex; gap: 6px; align-items: center; }
.nav a {
  text-decoration: none; color: var(--ink);
  padding: 8px 12px; border-radius: 6px;
  display: inline-flex; align-items: center; gap: 6px;
}
.nav a svg { width: 15px; height: 15px; }
.nav a:hover { background: #fdecee; }
.nav a[aria-current="page"] { background: var(--red); color: #fff; }
.nav .top-dl {
  background: var(--red); color: #fff; font-weight: 700;
}
.nav .top-dl:hover { background: var(--red-deep); }
.hero {
  background: #fff;
  border-bottom: 1px solid var(--line);
}
.hero__in {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
  padding: 40px 0 36px;
}
.kicker { margin: 0 0 8px; color: var(--red); font-size: 13px; font-weight: 700; letter-spacing: 0.08em; }
h1 { margin: 0 0 14px; font-size: 34px; line-height: 1.32; }
h2 { margin: 0 0 12px; font-size: 24px; line-height: 1.4; }
h3 { margin: 16px 0 8px; font-size: 18px; }
p { margin: 0 0 13px; }
.wrap { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; padding: 28px 0; }
.sec { padding: 8px 0 4px; }
.feats { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
.feat {
  background: var(--card);
  border: 1px solid var(--line);
  border-top: 4px solid var(--red);
  border-radius: 8px;
  padding: 18px 18px 8px;
}
.feat svg { width: 28px; height: 28px; color: var(--red); margin-bottom: 8px; }
.cards-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.cards-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 16px 16px 8px;
}
.card svg { width: 24px; height: 24px; color: var(--red); }
.quotes { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; }
.quote { background: #fff; border: 1px solid var(--line); padding: 16px; }
.quote strong { display: block; margin-top: 8px; font-size: 13px; color: var(--muted); }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.stat { background: #fff; text-align: center; padding: 16px 8px; border: 1px solid var(--line); border-radius: 8px; }
.stat b { display: block; color: var(--red); font-size: 26px; }
table { width: 100%; border-collapse: collapse; background: #fff; }
th, td { border: 1px solid var(--line); padding: 11px 12px; text-align: left; vertical-align: top; }
th { background: var(--red); color: #fff; }
.faq details { background: #fff; border: 1px solid var(--line); margin-bottom: 8px; padding: 4px 14px; }
.faq summary { cursor: pointer; font-weight: 700; padding: 10px 0; }
.note { background: #fff4f4; border-left: 4px solid var(--red); padding: 12px 14px; margin: 14px 0; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 16px 0; }
.btn, .btn-ghost {
  display: inline-flex; align-items: center; gap: 8px;
  min-height: 46px; padding: 0 18px; border-radius: 6px;
  text-decoration: none; font-weight: 700;
  transition: background 0.15s ease, color 0.15s ease;
}
.btn { background: var(--red); color: #fff; }
.btn:hover { background: var(--red-deep); }
.btn-ghost { background: #fff; color: var(--red); border: 1px solid var(--red); }
.btn-ghost:hover { background: #fdecee; }
.btn svg, .btn-ghost svg { width: 18px; height: 18px; }
.foot { background: #1c1f24; color: #c9ced4; padding: 26px 0 34px; }
.foot__in { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; font-size: 14px; }
.foot p { color: #c9ced4; }
@media (max-width: 900px) {
  h1 { font-size: 26px; }
  .feats, .cards-2, .cards-4, .quotes, .stats { grid-template-columns: 1fr; }
  .nav a span { display: none; }
  .nav .top-dl span { display: inline; }
}