:root {
  --blue: #2f74ff;
  --blue-bright: #6ca0ff;
  --ink: #060a12;
  --line: rgba(157, 181, 221, .18);
  --muted: #94a2bb;
  --white: #edf4ff;
  --mono: ui-monospace, SFMono-Regular, Consolas, monospace;
  --sans: 'Segoe UI', 'Microsoft YaHei', system-ui, sans-serif;
  color: var(--white);
  background: var(--ink);
  font: 15px/1.75 var(--sans);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 110px; }
body { margin: 0; overflow-x: hidden; }
body::before { content: ''; position: fixed; inset: 0; z-index: -2; pointer-events: none; background: linear-gradient(90deg, rgba(73,111,175,.04) 1px, transparent 1px), linear-gradient(rgba(73,111,175,.035) 1px, transparent 1px); background-size: 80px 80px; mask-image: linear-gradient(to bottom, black, transparent 75%); }
.noise { position: fixed; inset: 0; z-index: 10; pointer-events: none; opacity: .025; background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.5'/%3E%3C/svg%3E"); }
a { color: #9cc0ff; text-underline-offset: 3px; }
a:hover { color: #d5e4ff; }
button { font: inherit; }
.skip-link { position: fixed; left: -9999px; top: 8px; z-index: 30; padding: 8px 12px; color: #fff; background: #14336d; }
.skip-link:focus { left: 12px; }

.site-header { height: 86px; position: sticky; top: 0; z-index: 20; background: #060a12; border-bottom: 1px solid var(--line); }
.header-inner { height: 100%; max-width: 1240px; margin: auto; padding: 0 34px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; gap: 11px; color: var(--white); text-decoration: none; font-size: 14px; font-weight: 800; letter-spacing: .12em; line-height: 1.2; }
.brand img { width: 34px; height: 30px; object-fit: contain; }
.brand small { display: block; margin-top: 3px; color: #71809b; font: 400 8px/1 var(--mono); letter-spacing: .12em; }
.nav-links { display: flex; align-items: center; gap: 31px; font-size: 13px; }
.nav-links a { color: #aab9d2; text-decoration: none; }
.nav-links a:hover, .nav-links a[aria-current] { color: var(--white); }
.nav-links a[aria-current] { box-shadow: 0 2px 0 var(--blue); }
.nav-cta { padding: 9px 15px; border: 1px solid rgba(108,160,255,.62); color: var(--white) !important; }
.nav-cta span { margin-left: 10px; color: var(--blue-bright); }
.nav-cta { display: inline-flex; align-items: center; gap: 10px; }
.nav-cta .icon { width: 16px; height: 16px; flex: none; color: var(--blue-bright); }
.menu-button { display: none; padding: 8px; border: 0; background: none; cursor: pointer; }
.menu-button i { display: block; width: 22px; height: 1px; margin: 5px; background: var(--white); }

.layout { max-width: 1240px; margin: auto; padding: 64px 34px 92px; display: grid; grid-template-columns: 205px minmax(0, 1fr); gap: 70px; }
.toc { position: sticky; top: 125px; align-self: start; display: flex; flex-direction: column; padding: 3px 0 20px; border-left: 1px solid var(--line); }
.toc-title { padding: 0 0 15px 18px; color: var(--blue-bright); font: 500 10px var(--mono); letter-spacing: .15em; }
.toc a { padding: 7px 18px; margin-left: -1px; border-left: 2px solid transparent; color: #8999b4; font-size: 13px; line-height: 1.5; text-decoration: none; }
.toc a:hover, .toc a:focus-visible, .toc a.active { border-color: var(--blue); color: var(--white); background: rgba(47,116,255,.06); }
.content { max-width: 820px; min-width: 0; }
.page-head { padding: 0 0 39px; border-bottom: 1px solid var(--line); }
.eyebrow, .section-kicker { display: flex; align-items: center; gap: 10px; color: var(--blue-bright); font: 500 10px var(--mono); letter-spacing: .14em; }
.eyebrow b { margin-left: 4px; color: #4b5c79; font-weight: 400; }
.pulse { width: 6px; height: 6px; flex: none; border-radius: 50%; background: var(--blue); box-shadow: 0 0 14px var(--blue); }
.page-head h1 { max-width: 760px; margin: 25px 0 16px; color: var(--white); font-size: 40px; font-weight: 700; line-height: 1.25; }
.lead { max-width: 690px; margin: 0; color: var(--muted); font-size: 16px; line-height: 1.8; }
.progress-line { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 33px; color: #c4d6f5; font: 500 11px var(--mono); }
.progress-line span { padding-bottom: 5px; border-bottom: 1px solid #315b9c; }
.progress-line b { color: #4e6388; font-weight: 400; }
.notice { margin: 34px 0 8px; padding: 18px 21px; border-left: 2px solid var(--blue); background: rgba(36,70,126,.13); }
.notice strong { font-size: 14px; }
.notice p { margin: 5px 0 0; color: #a6b6d0; font-size: 14px; }
.section { padding: 47px 0 50px; border-bottom: 1px solid var(--line); }
.section h2 { margin: 8px 0 16px; color: var(--white); font-size: 26px; font-weight: 650; line-height: 1.4; }
.section h3 { margin: 0 0 12px; font-size: 16px; font-weight: 650; line-height: 1.4; }
.section p { margin: 10px 0 15px; color: #a4b2cb; }
.section ol, .section ul { margin: 16px 0; padding-left: 23px; }
.section li { margin: 10px 0; padding-left: 5px; color: #c0cce0; }
.section li::marker { color: var(--blue-bright); font-weight: 600; }
.section strong { color: #e4eeff; }
.hint { color: #8899b5 !important; font-size: 13px; }
.inline-note { margin-top: 20px; padding: 13px 17px; border-left: 2px solid #bb9858; background: rgba(112,88,46,.13); color: #d0bd9d; font-size: 13px; }
.client-paths { margin-top: 25px; }
.client-path { padding: 22px 0 24px; border-top: 1px solid var(--line); }
.client-path-heading { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px 16px; }
.client-path-heading h3 { margin: 0; }
.client-path-heading span { color: var(--blue-bright); font: 500 10px var(--mono); }
.client-path ol { margin: 12px 0 0; }
.client-path li, .client-path p { font-size: 14px; }
.client-path .hint { margin-bottom: 0; }
.codebox { position: relative; min-height: 70px; padding: 15px 78px 15px 14px; overflow-x: auto; border: 1px solid #27446e; background: #0b1629; color: #dbe8ff; }
.codebox code { padding: 0; background: transparent; color: inherit; line-height: 1.8; white-space: nowrap; }
.copy { position: absolute; right: 9px; top: 9px; padding: 3px 8px; border: 1px solid #426ba6; background: #102d5a; color: #e4eeff; cursor: pointer; font-size: 11px; }
.copy:hover { background: #1d4b91; }
.table-wrap { max-width: 100%; margin: 23px 0; overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 12px 14px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { color: #7fa8ed; background: rgba(47,116,255,.08); font: 500 11px var(--mono); }
td:first-child { width: 29%; color: #d7e4f8; font-weight: 600; }
code { padding: 2px 4px; background: rgba(87,132,200,.12); color: #c3daff; font: .9em/1.5 var(--mono); overflow-wrap: anywhere; }
.faq details { padding: 14px 0; border-top: 1px solid var(--line); }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary { color: #dce9ff; cursor: pointer; font-size: 14px; font-weight: 600; line-height: 1.5; }
.faq details p { margin: 10px 0 0; padding: 0 0 1px 18px; font-size: 13px; }
.footer { display: flex; flex-wrap: wrap; gap: 18px; padding: 30px 0; color: #63738f; font: 10px var(--mono); }
.footer a { color: #aab9d2; text-decoration: none; }

@media (max-width: 850px) {
  .layout { grid-template-columns: 170px minmax(0,1fr); gap: 34px; padding: 45px 22px 70px; }
  .header-inner { padding: 0 22px; }
}
@media (max-width: 680px) {
  html { scroll-padding-top: 90px; }
  .site-header { height: 70px; }
  .header-inner { padding: 0 22px; }
  .nav-links { display: none; }
  .menu-button { display: block; }
  .nav-links.open { position: absolute; top: 70px; left: 0; right: 0; display: flex; flex-direction: column; align-items: stretch; gap: 0; padding: 10px 22px 17px; border-bottom: 1px solid var(--line); background: #090f1a; }
  .nav-links.open a { padding: 10px 0; }
  .nav-links.open .nav-cta { margin-top: 7px; padding: 9px 12px; }
  .layout { display: block; padding: 0 22px 55px; }
  .toc { position: static; display: flex; flex-direction: row; gap: 19px; margin: 0 -22px; padding: 13px 22px; overflow-x: auto; scrollbar-width: none; white-space: nowrap; border: 0; border-bottom: 1px solid var(--line); }
  .toc::-webkit-scrollbar { display: none; }
  .toc-title { display: none; }
  .toc a { flex: none; margin: 0; padding: 2px 0; border: 0; color: #9daecb; font-size: 12px; }
  .toc a:hover, .toc a:focus-visible, .toc a.active { color: var(--white); background: none; box-shadow: 0 1px 0 var(--blue); }
  .page-head { padding: 43px 0 34px; }
  .page-head h1 { margin-top: 22px; font-size: 30px; }
  .lead { font-size: 14px; }
  .progress-line { gap: 8px; margin-top: 28px; font-size: 10px; }
  .section { padding: 37px 0 39px; }
  .section h2 { font-size: 22px; }
  .client-path { padding: 18px 0 22px; }
  .notice { margin-top: 29px; }
  .footer { gap: 11px 18px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}