:root {
  --bg: #f4f1ea;
  --paper: #fffdf8;
  --orange: #d35400;
  --orange-d: #a84300;
  --ink: #2c2416;
  --mute: #6b6254;
  --line: #ddd4c4;
  --num: #fff;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: "Segoe UI", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.78;
}

a { color: var(--orange-d); }
a:hover { color: var(--orange); }

.page { width: min(1100px, calc(100% - 28px)); margin: 0 auto; }

header.head {
  padding: 22px 0 10px;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.brand {
  font-size: 26px;
  font-weight: 800;
  color: var(--orange-d);
}

.brand span {
  display: block;
  font-size: 12px;
  font-weight: 400;
  color: var(--mute);
  margin-top: 4px;
}

nav.steps-nav {
  display: flex;
  gap: 0;
}

nav.steps-nav a {
  text-decoration: none;
  color: var(--ink);
  background: #efe8da;
  padding: 8px 14px;
  border: 1px solid var(--line);
  margin-left: -1px;
  font-size: 14px;
}

nav.steps-nav a.current {
  background: var(--orange);
  color: #fff;
  border-color: var(--orange);
}

.hero {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 28px 28px 24px;
  margin: 18px 0 26px;
  display: grid;
  grid-template-columns: 1.4fr 0.8fr;
  gap: 24px;
}

.hero h1 { font-size: 28px; line-height: 1.4; margin-bottom: 12px; }
.hero .lead { color: var(--mute); }

.mini-list { list-style: none; margin-top: 12px; }
.mini-list li { padding: 4px 0 4px 18px; position: relative; }
.mini-list li::before {
  content: "";
  width: 8px; height: 8px;
  background: var(--orange);
  position: absolute; left: 0; top: 10px;
}

.btn {
  display: inline-block;
  margin-top: 16px;
  background: var(--orange);
  color: #fff;
  text-decoration: none;
  padding: 12px 22px;
  font-weight: 700;
}

.btn:hover { background: var(--orange-d); color: #fff; }

.btn-plain {
  display: inline-block;
  margin: 16px 0 0 8px;
  padding: 11px 16px;
  border: 1px solid var(--orange);
  text-decoration: none;
}

.rail { position: relative; margin: 10px 0 36px; padding-left: 58px; }

.rail::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 8px;
  bottom: 8px;
  width: 3px;
  background: #e6d3b8;
}

.block { background: var(--paper); border: 1px solid var(--line); padding: 20px 22px; margin-bottom: 18px; position: relative; }

.num {
  position: absolute;
  left: -58px;
  top: 18px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--orange);
  color: var(--num);
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
}

h2 { font-size: 20px; margin-bottom: 10px; }

ol.install { margin-left: 1.2em; }
ol.install li { margin-bottom: 8px; }

table.req {
  width: 100%;
  border-collapse: collapse;
  margin-top: 8px;
}

table.req th, table.req td {
  border: 1px solid var(--line);
  padding: 8px 10px;
  text-align: left;
}

table.req th { background: #f8eee0; }

.faq .item { background: var(--paper); border: 1px solid var(--line); padding: 14px 16px; margin-bottom: 10px; }
.faq .item h3 { font-size: 16px; margin-bottom: 6px; }

footer.site {
  border-top: 3px solid var(--orange);
  padding: 20px 0 36px;
  font-size: 13px;
  color: var(--mute);
  line-height: 1.7;
}

footer.site .safe { color: var(--orange-d); margin-bottom: 8px; }

@media (max-width: 800px) {
  .hero { grid-template-columns: 1fr; }
  header.head { flex-direction: column; align-items: flex-start; gap: 12px; }
  .rail { padding-left: 0; }
  .rail::before, .num { display: none; }
}