/* 第4套：步骤驱动 — 窄栏时间轴 + 序号圆标，炭灰/橙 */
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
  background: #fafaf8;
  color: #2b2b2b;
  line-height: 1.8;
  font-size: 16px;
}
a { color: #c24700; text-decoration: none; }
a:hover { text-decoration: underline; }
.bar {
  background: #2b2b2b;
  color: #fff;
}
.bar .row {
  width: min(960px, calc(100% - 28px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 56px;
}
.nm {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  border-left: 4px solid #e85d04;
  padding-left: 10px;
}
.nm:hover { color: #ffd7b3; text-decoration: none; }
.menu a {
  color: #e8e8e8;
  margin-left: 20px;
  font-size: 15px;
  padding: 4px 0;
}
.menu a:hover, .menu a.cur {
  color: #ffb36b;
  text-decoration: none;
  border-bottom: 2px solid #e85d04;
}
.leadbox {
  background: #fff4ea;
  border-bottom: 3px solid #e85d04;
  padding: 36px 0 28px;
}
.leadbox .row { width: min(960px, calc(100% - 28px)); margin: 0 auto; }
.leadbox h1 { font-size: 28px; line-height: 1.4; margin-bottom: 12px; }
.leadbox p { color: #5a4638; margin-bottom: 18px; }
.go {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #e85d04;
  color: #fff;
  padding: 11px 20px;
  font-weight: 700;
  margin-right: 10px;
}
.go:hover { background: #c24700; color: #fff; text-decoration: none; }
.go2 {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid #e85d04;
  color: #c24700;
  padding: 10px 18px;
}
.rail {
  width: min(960px, calc(100% - 28px));
  margin: 28px auto 48px;
}
.step {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 16px;
  margin-bottom: 8px;
  position: relative;
}
.step:before {
  content: "";
  position: absolute;
  left: 21px;
  top: 48px;
  bottom: -8px;
  width: 2px;
  background: #f0d2bb;
}
.step:last-of-type:before { display: none; }
.num {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #e85d04;
  color: #fff;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.chunk {
  background: #fff;
  border: 1px solid #eedfd2;
  border-left: 8px solid #e85d04;
  padding: 16px 18px 14px;
  margin-bottom: 18px;
}
.chunk h2 { font-size: 20px; color: #9a3b00; margin-bottom: 10px; }
.chunk p { margin-bottom: 10px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.mini {
  background: #fff8f2;
  padding: 12px;
  border: 1px dashed #e8c8aa;
}
.mini h3 { font-size: 16px; margin-bottom: 6px; }
table.need { width: 100%; border-collapse: collapse; font-size: 15px; }
table.need th, table.need td { border: 1px solid #ecd8c6; padding: 8px 10px; }
table.need th { background: #fff0e3; text-align: left; }
.faq-box { margin-top: 8px; }
.faq-box article { padding: 12px 0; border-bottom: 1px solid #efe4da; }
.faq-box h3 { font-size: 16px; margin-bottom: 6px; }
.base {
  background: #2b2b2b;
  color: #d7d0c8;
  padding: 24px 0;
  font-size: 13px;
}
.base .row { width: min(960px, calc(100% - 28px)); margin: 0 auto; }
.base a { color: #ffb36b; margin-right: 12px; }
.base p { margin-top: 8px; }
@media (max-width: 700px) {
  .grid2 { grid-template-columns: 1fr; }
  .bar .row { flex-direction: column; padding: 10px 0; }
  .menu a { margin: 8px 10px 0 0; }
}