:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --text: #1f2329;
  --text2: #646a73;
  --text3: #8f959e;
  --line: #e8eaed;
  --primary: #2b6de5;
  --primary-soft: #eaf1ff;
  --danger: #d14343;
  --max: 760px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.top {
  background: #fff;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 2;
}

.top-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
}

.logo {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 14px;
}

nav { display: flex; gap: 16px; flex-wrap: wrap; }
nav a { color: var(--text2); font-size: 14px; }
nav a.active { color: var(--primary); font-weight: 600; }

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 28px 20px 64px;
}

.hero {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px 24px;
  margin-bottom: 16px;
}

h1 { font-size: 28px; line-height: 1.3; margin: 0 0 8px; }
h2 { font-size: 18px; margin: 28px 0 8px; }
.lead { color: var(--text2); margin: 0; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 8px 22px 18px;
  margin-bottom: 16px;
}

.faq { border-top: 1px solid var(--line); padding: 14px 0; }
.faq:first-child { border-top: 0; }
.faq h3 { margin: 0 0 4px; font-size: 16px; }
.faq p { margin: 0; color: var(--text2); }

.mail {
  display: inline-block;
  margin-top: 8px;
  background: var(--primary-soft);
  color: var(--primary);
  padding: 8px 12px;
  border-radius: 8px;
  font-weight: 600;
}

.meta { color: var(--text3); font-size: 13px; }

ul { padding-left: 1.2em; }
li { margin: 6px 0; }

footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 20px 32px;
  color: var(--text3);
  font-size: 13px;
}