* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  background: #faf7f2;
  color: #242423;
  font-size: 16px;
  line-height: 1.8;
}
a { color: #c24d00; }

.sticky {
  position: sticky;
  top: 0;
  z-index: 20;
  background: #242423;
  color: #fff;
}
.sticky .bar {
  width: 1200px;
  max-width: 96%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
}
.brand {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 2px;
  color: #ff9f1c;
  display: flex;
  align-items: center;
  gap: 8px;
}
.sticky nav a {
  color: #eee;
  text-decoration: none;
  margin-left: 22px;
  font-weight: 600;
  padding-bottom: 4px;
  border-bottom: 2px solid transparent;
}
.sticky nav a.current { color: #ff9f1c; border-bottom-color: #ff9f1c; }

.hero-step {
  background: #e85d04;
  color: #fff;
  padding: 40px 0 36px;
}
.hero-step .wide { width: 1200px; max-width: 96%; margin: 0 auto; display: grid; grid-template-columns: 1.3fr 0.7fr; gap: 28px; }
.hero-step h1 { font-size: 28px; line-height: 1.35; margin-bottom: 14px; }
.hero-step p { margin-bottom: 10px; color: #ffe8d6; }
.big {
  display: inline-block;
  background: #242423;
  color: #ff9f1c;
  text-decoration: none;
  font-weight: 800;
  padding: 12px 24px;
  margin: 10px 8px 0 0;
}
.big:hover { color: #fff; }
.preview { background: rgba(0,0,0,0.18); padding: 16px 18px; }
.preview ol { margin-left: 20px; }
.preview li { margin: 6px 0; }

.wide { width: 1200px; max-width: 96%; margin: 0 auto; }
.track { padding: 32px 0; }
.track.shade { background: #fff3e6; }

.step {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 18px;
  margin-bottom: 8px;
}
.num {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: #e85d04;
  color: #fff;
  font-size: 26px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
}
.step h2 { font-size: 20px; color: #9a3412; margin-bottom: 8px; }
.step p { margin-bottom: 10px; text-align: justify; }

.cards {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 12px;
  margin-top: 8px;
}
.cards article {
  background: #fff;
  border: 1px solid #f0d3b8;
  padding: 12px;
}
.cards h3 { font-size: 15px; color: #e85d04; margin-bottom: 6px; }

table.steps {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  margin: 10px 0;
}
table.steps th, table.steps td { border: 1px solid #f0c9a0; padding: 8px; text-align: left; }
table.steps th { background: #242423; color: #ff9f1c; }

.ask { background: #fff; border-left: 5px solid #e85d04; padding: 12px 14px; margin: 10px 0; }
.ask h3 { font-size: 16px; margin-bottom: 6px; }

.tail {
  background: #242423;
  color: #ecd9c6;
  padding: 24px 0;
  font-size: 13px;
}
.tail a { color: #ff9f1c; margin-right: 16px; }

@media (max-width: 900px) {
  .hero-step .wide, .step, .cards { grid-template-columns: 1fr; display: block; }
  .num { margin-bottom: 8px; }
}