:root {
  --orange: #f47321;
  --orange-dark: #df5c00;
  --amber: #ffb81c;
  --bg: #f1f1f1;
  --card: #ffffff;
  --text: #2b2b2b;
  --muted: #6a6a6a;
  --line: #e2e2e2;
  --dark: #1e1e1e;
  --soft: #fff4ec;
  --radius: 8px;
  --wrap: 1120px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
}
img { max-width: 100%; display: block; }
a { color: var(--orange-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 16px; }

/* header */
.site-header { background: #fff; border-bottom: 3px solid var(--orange); position: sticky; top: 0; z-index: 20; }
.head-in { display: flex; align-items: center; gap: 24px; min-height: 60px; }
.logo { display: flex; align-items: center; flex-shrink: 0; }
.logo img { height: 24px; width: auto; }
.nav { display: flex; gap: 4px; flex: 1; }
.nav a { color: var(--text); font-size: 14px; font-weight: 600; padding: 8px 12px; border-radius: 4px; }
.nav a:hover { background: var(--soft); text-decoration: none; }
.nav a[aria-current="page"] { color: var(--orange-dark); background: var(--soft); }
.head-btn { display: flex; gap: 8px; }
.btn { display: inline-block; background: var(--orange); color: #fff; font-weight: 700; font-size: 14px; padding: 8px 18px; border-radius: 4px; border: 2px solid var(--orange); cursor: pointer; }
.btn:hover { background: var(--orange-dark); border-color: var(--orange-dark); text-decoration: none; }
.btn-ghost { background: transparent; color: var(--orange-dark); }
.btn-ghost:hover { color: #fff; }
.burger { display: none; background: none; border: 0; width: 40px; height: 40px; margin-left: auto; cursor: pointer; }
.burger span, .burger span::before, .burger span::after { display: block; width: 22px; height: 2px; background: var(--text); position: relative; margin: 0 auto; }
.burger span::before, .burger span::after { content: ""; position: absolute; left: 0; }
.burger span::before { top: -7px; }
.burger span::after { top: 7px; }

/* breadcrumbs */
.crumbs { font-size: 13px; color: var(--muted); padding: 16px 0 0; }
.crumbs a { color: var(--muted); }
.crumbs span { margin: 0 6px; }

/* hero */
.hero { padding: 20px 0 8px; }
.hero-box { background: #fff; border: 1px solid var(--line); border-left: 6px solid var(--orange); border-radius: var(--radius); padding: 32px 32px 28px; }
.badge { display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--orange-dark); background: var(--soft); padding: 4px 10px; border-radius: 3px; margin-bottom: 14px; }
h1 { font-size: 36px; line-height: 1.2; margin-bottom: 14px; }
.lead { font-size: 18px; color: #444; max-width: 820px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }

/* toc */
.toc { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 4px; }
.toc a { font-size: 13px; font-weight: 600; color: var(--text); background: #fff; border: 1px solid var(--line); padding: 6px 12px; border-radius: 20px; }
.toc a:hover { border-color: var(--orange); color: var(--orange-dark); text-decoration: none; }

/* layout */
main { padding-bottom: 40px; }
.section { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 32px; margin-top: 18px; }
h2 { font-size: 26px; line-height: 1.3; margin-bottom: 14px; padding-bottom: 10px; border-bottom: 2px solid var(--soft); }
h3 { font-size: 18px; margin: 18px 0 6px; }
.section p { margin-bottom: 12px; }
.section p:last-child { margin-bottom: 0; }
.section ul.list, .section ol.list { margin: 8px 0 12px 22px; }
.section li { margin-bottom: 6px; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 14px; margin-top: 14px; }
.card { background: var(--bg); border: 1px solid var(--line); border-top: 3px solid var(--orange); border-radius: var(--radius); padding: 18px; }
.card h3 { margin-top: 0; font-size: 17px; }
.card p { font-size: 15px; color: #444; }

.steps { counter-reset: s; list-style: none; margin: 14px 0 0; }
.steps li { counter-increment: s; position: relative; padding: 4px 0 14px 52px; margin: 0; }
.steps li::before { content: counter(s); position: absolute; left: 0; top: 0; width: 36px; height: 36px; border-radius: 50%; background: linear-gradient(135deg, var(--amber), var(--orange-dark)); color: #fff; font-weight: 800; display: flex; align-items: center; justify-content: center; }
.steps strong { display: block; }

.note { background: var(--soft); border-left: 4px solid var(--orange); padding: 14px 18px; border-radius: 4px; margin-top: 14px; font-size: 15px; }
.warn { background: #fff7e0; border-left-color: var(--amber); }

.table-wrap { overflow-x: auto; margin-top: 14px; }
table { border-collapse: collapse; width: 100%; font-size: 15px; }
th, td { text-align: left; padding: 10px 14px; border: 1px solid var(--line); vertical-align: top; }
th { background: var(--dark); color: #fff; font-weight: 600; }
tr:nth-child(even) td { background: #fafafa; }

/* faq */
details { border: 1px solid var(--line); border-radius: var(--radius); margin-top: 10px; background: #fff; }
summary { cursor: pointer; font-weight: 700; padding: 14px 18px; list-style: none; position: relative; padding-right: 44px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; position: absolute; right: 18px; top: 10px; font-size: 22px; color: var(--orange-dark); }
details[open] summary::after { content: "\2212"; }
details[open] summary { border-bottom: 1px solid var(--line); }
details p { padding: 14px 18px; }

/* footer */
.site-footer { background: var(--dark); color: #bdbdbd; padding: 32px 0 24px; font-size: 14px; }
.foot-top { display: flex; flex-wrap: wrap; gap: 24px; justify-content: space-between; margin-bottom: 20px; }
.foot-links { display: flex; flex-wrap: wrap; gap: 8px 20px; }
.foot-links a { color: #e6e6e6; }
.age { display: inline-block; border: 2px solid var(--orange); color: var(--amber); font-weight: 800; padding: 2px 10px; border-radius: 4px; margin-right: 8px; }
.site-footer p { max-width: 860px; margin-bottom: 8px; }
.to-top { position: fixed; right: 16px; bottom: 16px; width: 42px; height: 42px; border-radius: 50%; background: var(--orange); color: #fff; font-size: 20px; line-height: 42px; text-align: center; display: none; z-index: 30; }
.to-top.show { display: block; }
.to-top:hover { background: var(--orange-dark); text-decoration: none; }

@media (max-width: 860px) {
  .burger { display: block; }
  .nav, .head-btn { display: none; }
  .head-in { flex-wrap: wrap; gap: 0; }
  .site-header.open .nav { display: flex; flex-direction: column; width: 100%; padding: 8px 0; }
  .site-header.open .head-btn { display: flex; width: 100%; padding: 4px 0 14px; }
  h1 { font-size: 28px; }
  h2 { font-size: 22px; }
  .hero-box, .section { padding: 20px 18px; }
  .lead { font-size: 16px; }
}