:root {
  --blue: #1c40f2;
  --blue-700: #142fc0;
  --blue-050: #eef1ff;
  --orange: #f5931e;
  --orange-400: #faa72d;
  --ink: #101322;
  --body: #3b4155;
  --muted: #6b7280;
  --line: #e6e8ef;
  --bg: #f6f7fb;
  --card: #ffffff;
  --radius: 14px;
  --shadow-sm: 0 1px 2px rgba(16, 19, 34, .06);
  --shadow-md: 0 10px 30px rgba(16, 19, 34, .08);
  --maxw: 1080px;
  --font: 'Rubik', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--body);
  background: var(--bg);
  line-height: 1.6;
  font-size: 16px;
}
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ---------- Header ---------- */
.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 40;
}
.site-header .bar { display: flex; align-items: center; gap: 20px; height: 66px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; color: var(--ink); font-size: 1.15rem; }
.brand:hover { text-decoration: none; }
.brand .logo {
  width: 34px; height: 34px; border-radius: 9px;
  background: linear-gradient(135deg, var(--blue), var(--blue-700));
  display: grid; place-items: center; color: #fff; font-weight: 700;
}
.brand .tag { color: var(--muted); font-weight: 400; font-size: .95rem; }
.header-nav { margin-left: auto; display: flex; align-items: center; gap: 22px; }
.header-nav a { color: var(--body); font-weight: 500; font-size: .95rem; }
.btn-ticket {
  background: var(--orange); color: #fff !important; padding: 9px 16px;
  border-radius: 9px; font-weight: 500;
}
.btn-ticket:hover { background: var(--orange-400); text-decoration: none; }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-700) 100%);
  color: #fff; padding: 62px 0 74px;
  position: relative; overflow: hidden;
}
.hero::after {
  content: ''; position: absolute; right: -80px; top: -80px;
  width: 320px; height: 320px; border-radius: 50%;
  background: radial-gradient(circle, rgba(245,147,30,.35), transparent 70%);
}
.hero h1 { font-size: 2.4rem; font-weight: 700; margin: 0 0 10px; letter-spacing: -.5px; }
.hero p { font-size: 1.1rem; opacity: .9; margin: 0 0 28px; }
.searchbox { display: flex; max-width: 620px; background: #fff; border-radius: 12px; box-shadow: var(--shadow-md); overflow: hidden; }
.searchbox input {
  flex: 1; border: 0; padding: 16px 18px; font-size: 1.02rem; font-family: var(--font); color: var(--ink);
}
.searchbox input:focus { outline: none; }
.searchbox button {
  border: 0; background: var(--orange); color: #fff; padding: 0 26px; font-weight: 600;
  font-family: var(--font); font-size: 1rem; cursor: pointer;
}
.searchbox button:hover { background: var(--orange-400); }
.hero .hint { margin-top: 14px; font-size: .9rem; opacity: .85; }
.hero .hint a { color: #fff; text-decoration: underline; }

/* ---------- Sections ---------- */
.section { padding: 46px 0; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 22px; }
.section-head h2 { font-size: 1.35rem; color: var(--ink); margin: 0; font-weight: 600; }
.section-head a { font-size: .92rem; font-weight: 500; }

/* Category grid */
.cat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 18px; }
.cat-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow-sm); transition: transform .12s ease, box-shadow .12s ease, border-color .12s;
  display: block; color: inherit;
}
.cat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: #d6d9e6; text-decoration: none; }
.cat-card .ic {
  width: 44px; height: 44px; border-radius: 11px; background: var(--blue-050); color: var(--blue);
  display: grid; place-items: center; margin-bottom: 14px;
}
.cat-card h3 { margin: 0 0 6px; font-size: 1.08rem; color: var(--ink); font-weight: 600; }
.cat-card p { margin: 0 0 12px; color: var(--muted); font-size: .93rem; }
.cat-card .count { font-size: .82rem; color: var(--blue); font-weight: 500; }

/* Article lists */
.article-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 16px; }
.article-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px; box-shadow: var(--shadow-sm); color: inherit;
}
.article-card:hover { border-color: #d6d9e6; text-decoration: none; box-shadow: var(--shadow-md); }
.article-card .eyebrow { font-size: .78rem; color: var(--orange); font-weight: 600; text-transform: uppercase; letter-spacing: .4px; }
.article-card h3 { margin: 6px 0 8px; font-size: 1.05rem; color: var(--ink); font-weight: 600; }
.article-card p { margin: 0; color: var(--muted); font-size: .92rem; }

.list-links { list-style: none; padding: 0; margin: 0; }
.list-links li { border-bottom: 1px solid var(--line); }
.list-links li:last-child { border-bottom: 0; }
.list-links a { display: flex; align-items: center; gap: 12px; padding: 15px 4px; color: var(--ink); font-weight: 500; }
.list-links a:hover { color: var(--blue); text-decoration: none; }
.list-links .doc-ic { color: var(--muted); flex: none; }
.list-links .arrow { margin-left: auto; color: var(--muted); }

/* Breadcrumb */
.breadcrumb { font-size: .88rem; color: var(--muted); padding: 22px 0 0; }
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--blue); }
.breadcrumb .sep { margin: 0 8px; }

/* ---------- Article page ---------- */
.article-layout { display: grid; grid-template-columns: 1fr 260px; gap: 40px; padding: 30px 0 60px; align-items: start; }
.article-main { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 40px; box-shadow: var(--shadow-sm); min-width: 0; }
.article-main h1 { font-size: 2rem; color: var(--ink); margin: 6px 0 10px; font-weight: 700; letter-spacing: -.4px; }
.article-meta { color: var(--muted); font-size: .86rem; margin-bottom: 28px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.prose { color: var(--body); font-size: 1.02rem; }
.prose h2 { color: var(--ink); font-size: 1.4rem; margin: 34px 0 12px; font-weight: 600; }
.prose h3 { color: var(--ink); font-size: 1.15rem; margin: 26px 0 10px; font-weight: 600; }
.prose p { margin: 0 0 16px; }
.prose ul, .prose ol { margin: 0 0 16px; padding-left: 24px; }
.prose li { margin-bottom: 6px; }
.prose a { text-decoration: underline; }
.prose img { border-radius: 10px; border: 1px solid var(--line); margin: 8px 0; }
.prose blockquote { margin: 18px 0; padding: 12px 18px; border-left: 4px solid var(--orange); background: #fff8ef; border-radius: 0 8px 8px 0; color: #6a5326; }
.prose code { background: var(--blue-050); color: var(--blue-700); padding: 2px 6px; border-radius: 5px; font-size: .88em; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.prose pre { background: #0f1530; color: #e6ebff; padding: 18px; border-radius: 10px; overflow-x: auto; margin: 0 0 18px; }
.prose pre code { background: none; color: inherit; padding: 0; }
.prose table { border-collapse: collapse; width: 100%; margin: 0 0 18px; font-size: .95rem; }
.prose th, .prose td { border: 1px solid var(--line); padding: 9px 12px; text-align: left; }
.prose th { background: var(--bg); font-weight: 600; color: var(--ink); }
mark { background: #fff2cc; padding: 0 2px; border-radius: 3px; }

.helpful { margin-top: 36px; padding: 22px; background: var(--bg); border-radius: 12px; text-align: center; }
.helpful p { margin: 0 0 12px; font-weight: 500; color: var(--ink); }
.helpful button {
  border: 1px solid var(--line); background: #fff; color: var(--body); padding: 9px 20px;
  border-radius: 9px; font-family: var(--font); font-weight: 500; cursor: pointer; margin: 0 5px; font-size: .95rem;
}
.helpful button:hover { border-color: var(--blue); color: var(--blue); }
.helpful.voted button { opacity: .5; pointer-events: none; }
.helpful .thanks { color: var(--blue); font-weight: 500; }

.article-side .side-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; position: sticky; top: 86px; }
.article-side h4 { margin: 0 0 12px; font-size: .8rem; text-transform: uppercase; letter-spacing: .5px; color: var(--muted); }
.article-side ul { list-style: none; padding: 0; margin: 0; }
.article-side li { margin-bottom: 10px; }
.article-side a { color: var(--body); font-size: .93rem; font-weight: 500; }
.article-side a:hover { color: var(--blue); }

/* ---------- Search results ---------- */
.result { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 20px; margin-bottom: 14px; display: block; color: inherit; }
.result:hover { border-color: #d6d9e6; text-decoration: none; box-shadow: var(--shadow-sm); }
.result .eyebrow { font-size: .78rem; color: var(--orange); font-weight: 600; }
.result h3 { margin: 4px 0 6px; color: var(--ink); font-size: 1.1rem; }
.result .snippet { color: var(--muted); font-size: .93rem; }
.empty { text-align: center; padding: 60px 20px; color: var(--muted); }
.empty svg { color: var(--line); margin-bottom: 16px; }
.empty h2 { color: var(--ink); margin: 0 0 8px; }

/* ---------- Footer ---------- */
.site-footer { background: #0f1530; color: #b9c0da; padding: 40px 0; margin-top: 40px; font-size: .92rem; }
.site-footer a { color: #fff; }
.site-footer .rows { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 20px; align-items: center; }
.site-footer .links { display: flex; gap: 22px; flex-wrap: wrap; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .article-layout { grid-template-columns: 1fr; }
  .article-side { display: none; }
  .hero h1 { font-size: 1.9rem; }
  .article-main { padding: 26px; }
  .header-nav a:not(.btn-ticket) { display: none; }
}

*:focus-visible { outline: 3px solid rgba(28,64,242,.4); outline-offset: 2px; border-radius: 4px; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }