/* 车邻汇官网 · 静态样式（无外部依赖，便于备案期间稳定访问） */
:root {
  --brand: #ff7a45;
  --ink: #1f2430;
  --sub: #5b6273;
  --line: #e8ebf0;
  --bg: #ffffff;
  --soft: #f7f8fa;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 960px; margin: 0 auto; padding: 0 24px; }

/* 顶部导航 */
header.nav {
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; background: rgba(255,255,255,.94);
  backdrop-filter: saturate(180%) blur(8px); z-index: 10;
}
header.nav .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: var(--ink); letter-spacing: .5px; }
.logo .mark {
  width: 28px; height: 28px; border-radius: 8px; background: var(--brand);
  display: inline-flex; align-items: center; justify-content: center;
  color: #fff; font-size: 15px; font-weight: 700;
}
header.nav nav a { color: var(--sub); margin-left: 22px; font-size: 14px; }
header.nav nav a:hover { color: var(--ink); text-decoration: none; }

/* 首屏 */
.hero { padding: 76px 0 64px; border-bottom: 1px solid var(--line); }
.hero h1 { font-size: 34px; line-height: 1.35; margin: 0 0 18px; letter-spacing: -.5px; }
.hero p.lead { font-size: 17px; color: var(--sub); max-width: 640px; margin: 0 0 28px; }
.hero .badge {
  display: inline-block; font-size: 13px; color: var(--brand);
  background: #fff4ee; border: 1px solid #ffe0d0; border-radius: 999px;
  padding: 4px 12px; margin-bottom: 20px;
}

/* 区块 */
section.block { padding: 56px 0; border-bottom: 1px solid var(--line); }
section.block h2 { font-size: 22px; margin: 0 0 8px; letter-spacing: -.2px; }
section.block p.desc { color: var(--sub); margin: 0 0 28px; max-width: 700px; }

/* 三步流程 */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.step { background: var(--soft); border: 1px solid var(--line); border-radius: 12px; padding: 20px; }
.step .n { font-size: 12px; color: var(--brand); font-weight: 700; letter-spacing: 1px; }
.step h3 { font-size: 16px; margin: 6px 0 8px; }
.step p { margin: 0; color: var(--sub); font-size: 14px; }

/* 条目列表 */
ul.plain { list-style: none; padding: 0; margin: 0; }
ul.plain li { padding: 12px 0; border-bottom: 1px dashed var(--line); color: var(--sub); }
ul.plain li:last-child { border-bottom: 0; }
ul.plain li b { color: var(--ink); font-weight: 600; }

/* 两栏信息 */
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.card { border: 1px solid var(--line); border-radius: 12px; padding: 20px; }
.card h3 { margin: 0 0 10px; font-size: 16px; }
.card p { margin: 0; color: var(--sub); font-size: 14px; }

/* 协议正文 */
.legal { padding: 48px 0 72px; }
.legal h1 { font-size: 26px; margin: 0 0 6px; }
.legal .meta { color: var(--sub); font-size: 13px; margin-bottom: 32px; }
.legal h2 { font-size: 17px; margin: 32px 0 10px; }
.legal p, .legal li { color: #333a48; font-size: 15px; }
.legal ul { padding-left: 22px; }
.legal ul li { margin-bottom: 6px; }
.note { background: var(--soft); border-left: 3px solid var(--brand); padding: 14px 16px; color: var(--sub); font-size: 14px; border-radius: 0 8px 8px 0; }

/* 页脚 */
footer.site { padding: 36px 0 48px; color: var(--sub); font-size: 13px; }
footer.site .row { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-bottom: 12px; }
footer.site .row a { color: var(--sub); }
footer.site .copy { color: #9aa1b1; line-height: 2; }

@media (max-width: 720px) {
  .hero { padding: 48px 0 40px; }
  .hero h1 { font-size: 26px; }
  .steps, .grid2 { grid-template-columns: 1fr; }
  header.nav nav a { margin-left: 14px; font-size: 13px; }
  section.block { padding: 40px 0; }
}