:root {
  --blue:#073e87;
  --blue2:#0c58ae;
  --navy:#062b61;
  --gold:#f4c542;
  --gold2:#d9a918;
  --ink:#0a2d5c;
  --muted:#60738c;
  --bg:#f3f6fa;
  --white:#fff;
  --line:#dbe4ef;
  --max:1320px;
  --radius:14px
}
* {
  box-sizing:border-box
}
html {
  scroll-behavior:smooth
}
body {
  margin:0;
  font-family:Inter,Arial,Helvetica,sans-serif;
  color:#263b52;
  background:var(--bg);
  line-height:1.68
}
img {
  display:block;
  max-width:100%;
  height:auto
}
a {
  color:inherit
}
.vh-site-header {
  position:sticky;
  top:0;
  z-index:30;
  background:linear-gradient(180deg,rgba(7,62,135,.99),rgba(4,42,96,.99));
  border-bottom:1px solid rgba(244,197,66,.55);
  box-shadow:0 8px 28px rgba(3,29,69,.34),inset 0 1px 0 rgba(255,255,255,.12);
  backdrop-filter:blur(12px)
}
.vh-header-inner {
  min-height:76px;
  width:100%;
  padding:10px 24px;
  display:grid;
  grid-template-columns:180px minmax(0,1fr) auto;
  align-items:center;
  gap:20px
}
.vh-logo img {
  width:158px;
  max-height:54px;
  object-fit:contain;
  filter:drop-shadow(0 2px 5px rgba(0,0,0,.3))
}
.vh-site-nav {
  display:flex;
  align-items:center;
  justify-content:center;
  gap:4px;
  min-width:0;
  flex-wrap:wrap
}
.vh-site-nav a {
  text-decoration:none;
  color:#f7fbff;
  padding:8px 9px;
  border-radius:8px;
  border:1px solid transparent;
  background:rgba(255,255,255,.04);
  font-size:13px;
  font-weight:800;
  white-space:nowrap;
  text-shadow:0 1px 2px rgba(0,0,0,.22)
}
.vh-site-nav a:hover,.vh-site-nav a:focus-visible {
  background:rgba(255,255,255,.15);
  border-color:rgba(255,225,106,.55);
  color:#ffe16a;
  outline:0
}
.vh-header-actions {
  display:flex;
  gap:9px
}
.vh-btn,.vh-header-actions a {
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:11px 20px;
  border:1px solid #c89b12;
  border-radius:9px;
  background:linear-gradient(180deg,#ffe16a,var(--gold));
  color:#17345d;
  text-decoration:none;
  text-transform:uppercase;
  font-size:13px;
  font-weight:900;
  box-shadow:0 8px 20px rgba(2,25,58,.3),inset 0 1px 0 rgba(255,255,255,.55);
  transition:.18s ease
}
.vh-btn:hover,.vh-header-actions a:hover {
  transform:translateY(-1px);
  background:#ffe479
}
.vh-btn-dark {
  background:linear-gradient(180deg,#2e82da,#1256a1)!important;
  border-color:#73abe3!important;
  color:#fff!important;
  box-shadow:0 8px 20px rgba(2,25,58,.34),inset 0 1px 0 rgba(255,255,255,.25)!important
}
.vh-btn-dark:hover,.vh-btn-dark:focus-visible {
  background:linear-gradient(180deg,#4396e8,#1767bb)!important;
  border-color:#a8d1f7!important;
  color:#fff!important
}
.vh-menu-toggle {
  display:none;
  width:44px;
  height:44px;
  border:1px solid rgba(255,255,255,.55);
  border-radius:9px;
  background:rgba(255,255,255,.1);
  color:#fff
}
.vh-menu-toggle span {
  display:block;
  width:23px;
  height:3px;
  margin:5px auto;
  background:currentColor;
  border-radius:2px
}
.vh-hero {
  color:#fff;
  background-color:var(--navy);
  background-size:cover;
  background-position:center
}
.vh-hero-inner {
  min-height:460px;
  padding:74px max(24px,calc((100vw - var(--max))/2));
  display:grid;
  grid-template-columns:minmax(300px,650px) 1fr;
  align-items:center;
  background:linear-gradient(90deg,rgba(4,39,86,.78),transparent)
}
.vh-hero-kicker {
  margin-bottom:12px;
  color:#ffe36d;
  font-size:14px;
  font-weight:900;
  letter-spacing:.08em;
  text-transform:uppercase
}
.vh-hero h1 {
  margin:0 0 18px;
  font-size:clamp(38px,4.3vw,64px);
  line-height:1.05;
  text-shadow:0 3px 20px rgba(0,0,0,.36)
}
.vh-hero p {
  max-width:650px;
  margin:0 0 28px;
  font-size:18px;
  color:rgba(255,255,255,.93)
}
.vh-section {
  padding:64px 22px
}
.vh-container {
  width:100%;
  max-width:var(--max);
  margin:0 auto
}
.vh-content-layout {
  display:grid;
  grid-template-columns:minmax(0,1fr) 310px;
  gap:30px;
  align-items:start
}
.vh-content-card,.vh-side-box {
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:0 15px 40px rgba(7,62,135,.08)
}
.vh-content-card {
  padding:34px;
  min-width:0
}
.vh-content-card h2 {
  scroll-margin-top:100px;
  margin:38px 0 14px;
  color:var(--ink);
  font-size:29px;
  line-height:1.2
}
.vh-content-card h2:first-of-type {
  margin-top:32px
}
.vh-content-card p {
  margin:0 0 20px
}
.vh-content-card p strong,
.vh-content-card li strong,
.vh-content-card td strong {
  font-weight:inherit
}
.vh-article-figure {
  margin:24px 0 32px;
  overflow:hidden;
  border:1px solid #cad9e8;
  border-radius:12px;
  background:#eaf1f8
}
.vh-article-figure img {
  width:100%;
  aspect-ratio:16/7.4;
  object-fit:cover
}
.vh-article-figure figcaption {
  padding:9px 13px;
  color:var(--muted);
  font-size:13px
}
.vh-article-meta {
  display:flex;
  gap:8px;
  margin-top:32px;
  padding-top:18px;
  border-top:1px solid var(--line);
  color:var(--muted);
  font-size:13px
}
.vh-sidebar {
  position:sticky;
  top:96px
}
.vh-side-box {
  padding:20px
}
.vh-side-box>strong {
  display:block;
  margin-bottom:13px;
  color:var(--ink);
  font-size:18px
}
.vh-toc-nav {
  display:grid;
  gap:7px;
  margin-bottom:17px
}
.vh-toc-nav a {
  padding:9px 10px;
  border-radius:8px;
  background:#f0f5fb;
  color:#385979;
  text-decoration:none;
  font-size:14px
}
.vh-toc-nav a:hover {
  background:#e1edfa;
  color:var(--blue)
}
.vh-side-box .vh-btn {
  width:100%
}
.vh-site-footer {
  padding:42px 22px;
  background:var(--navy);
  color:#dbe8f7
}
.vh-footer-main {
  display:grid;
  grid-template-columns:1.3fr .8fr .8fr;
  gap:40px;
  align-items:start
}
.vh-footer-logo img {
  width:145px;
  margin-bottom:16px
}
.vh-footer-main p {
  max-width:500px;
  margin:7px 0;
  color:#bcd0e7;
  font-size:14px
}
.vh-footer-help,.vh-footer-links {
  display:grid;
  gap:10px
}
.vh-footer-help a,.vh-footer-links a {
  color:#fff;
  text-decoration:none
}
.vh-footer-help strong {
  display:flex;
  width:54px;
  height:54px;
  align-items:center;
  justify-content:center;
  border:3px solid var(--gold);
  border-radius:50%;
  color:var(--gold);
  font-size:20px
}
.vh-redirect {
  min-height:100vh;
  padding:32px;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  text-align:center;
  background:linear-gradient(135deg,var(--navy),var(--blue2));
  color:#fff
}
.vh-redirect img {
  width:180px;
  margin-bottom:24px
}
.vh-redirect h1 {
  margin:0
}
.vh-redirect p {
  color:#dbe8f7
}
.vh-redirect .vh-btn {
  margin-top:10px
}
@media(max-width:1180px) {
  .vh-header-inner {
    grid-template-columns:160px 1fr auto
  }
  .vh-site-nav {
    grid-column:1/-1;
    grid-row:2
  }
  .vh-content-layout {
    grid-template-columns:minmax(0,1fr) 280px
  }
}
@media(max-width:780px) {
  .vh-header-inner {
    grid-template-columns:1fr 44px
  }
  .vh-menu-toggle {
    display:block
  }
  .vh-site-nav {
    display:none;
    grid-column:1/-1;
    grid-row:2
  }
  .vh-site-nav.vh-is-open {
    display:grid;
    grid-template-columns:repeat(2,1fr)
  }
  .vh-header-actions {
    grid-column:1/-1;
    grid-row:3
  }
  .vh-header-actions a {
    flex:1
  }
  .vh-hero-inner {
    min-height:400px;
    grid-template-columns:1fr;
    padding:55px 20px
  }
  .vh-content-layout,.vh-footer-main {
    grid-template-columns:1fr
  }
  .vh-sidebar {
    position:static
  }
  .vh-content-card {
    padding:22px
  }
  .vh-footer-main {
    gap:28px
  }
}
@media(max-width:430px) {
  .vh-site-nav.vh-is-open {
    grid-template-columns:1fr
  }
  .vh-hero h1 {
    font-size:36px
  }
  .vh-section {
    padding:40px 14px
  }
}
.vh-content-card h3 {
  scroll-margin-top:100px;
  margin:28px 0 12px;
  color:var(--ink);
  font-size:21px;
  line-height:1.3
}
.vh-content-card ul,.vh-content-card ol {
  margin:0 0 24px;
  padding-left:24px
}
.vh-content-card li {
  margin:7px 0
}
.vh-content-card table {
  width:100%;
  margin:24px 0;
  border-collapse:collapse;
  font-size:14px
}
.vh-content-card th,.vh-content-card td {
  padding:11px 12px;
  border:1px solid var(--line);
  text-align:left;
  vertical-align:top
}
.vh-content-card th {
  background:var(--blue);
  color:#fff
}
.vh-content-card tr:nth-child(even) td {
  background:#f2f6fb
}
.table-responsive {
  max-width:100%;
  overflow-x:auto
}
.table-responsive table {
  min-width:640px
}
.vh-toc-nav {
  max-height:60vh;
  padding-right:4px;
  overflow:auto
}
@media(max-width:780px) {
  .vh-content-card table {
    display:block;
    max-width:100%;
    overflow-x:auto
  }
  .vh-content-card thead,.vh-content-card tbody {
    min-width:620px
  }
}