:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --bg: #02050a;
  --bg2: #040b15;
  --surface: rgba(8, 18, 32, .78);
  --surface-soft: rgba(11, 25, 44, .56);
  --line: rgba(117, 201, 248, .16);
  --line-strong: rgba(99, 224, 255, .34);
  --text: #f6fbff;
  --muted: #9fb2c4;
  --muted-2: #6e879c;
  --cyan: #4be4ff;
  --cyan-soft: #a6f4ff;
  --blue: #4d8eff;
  --violet: #a07cff;
  --green: #68ecc2;
  --max: 1160px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 80% 4%, rgba(76, 111, 241, .17), transparent 27%),
    radial-gradient(circle at 8% 38%, rgba(22, 176, 226, .09), transparent 29%),
    linear-gradient(180deg, #02050a 0%, #040a14 52%, #02050a 100%);
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .11;
  background-image:
    linear-gradient(rgba(98, 176, 229, .09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(98, 176, 229, .09) 1px, transparent 1px);
  background-size: 92px 92px;
  -webkit-mask-image: radial-gradient(circle at 50% 24%, #000 0%, transparent 72%);
  mask-image: radial-gradient(circle at 50% 24%, #000 0%, transparent 72%);
}
body::after {
  content: "";
  position: fixed;
  width: 720px;
  height: 720px;
  right: -420px;
  bottom: -360px;
  border-radius: 50%;
  background: rgba(98, 74, 255, .09);
  filter: blur(120px);
  pointer-events: none;
}

a { color: var(--cyan-soft); text-decoration-color: rgba(75, 228, 255, .36); text-underline-offset: 4px; }
a:hover { color: #fff; text-decoration-color: var(--cyan); }
img { display: block; max-width: 100%; }
::selection { background: rgba(75, 228, 255, .22); }

.site-bar {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(115, 194, 241, .10);
  background: rgba(2, 7, 13, .72);
  backdrop-filter: blur(22px) saturate(1.22);
}
.site-bar__inner {
  width: min(calc(100% - 36px), var(--max));
  min-height: 82px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}
.brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}
.brand img { width: 222px; filter: drop-shadow(0 0 18px rgba(52, 152, 255, .11)); }
.site-bar__nav { display: flex; align-items: center; gap: 18px; color: var(--muted); font-size: 12px; font-weight: 700; }
.site-bar__nav a { color: inherit; text-decoration: none; }
.site-bar__nav a:hover { color: #fff; }
.site-bar__tag {
  padding: 8px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--cyan-soft);
  background: rgba(11, 24, 40, .54);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: .15em;
  text-transform: uppercase;
}

.page-shell { position: relative; z-index: 1; width: min(calc(100% - 36px), var(--max)); margin: 0 auto; padding: 86px 0 88px; }
.page-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 290px;
  gap: 70px;
  align-items: end;
  padding-bottom: 54px;
  border-bottom: 1px solid rgba(112, 192, 238, .13);
}
.page-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 190px;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), var(--violet), transparent);
  box-shadow: 0 0 16px rgba(75, 228, 255, .28);
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 22px;
  color: var(--cyan-soft);
  font-size: 10px;
  font-weight: 850;
  letter-spacing: .20em;
  text-transform: uppercase;
}
.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), transparent);
}
h1, h2, h3 { margin: 0; color: #fff; letter-spacing: -.035em; }
h1 { max-width: 820px; font-size: clamp(46px, 7vw, 78px); line-height: .98; }
h1 em { color: var(--cyan); font-style: normal; }
.lead { max-width: 780px; margin: 28px 0 0; color: #b9c9d6; font-size: clamp(16px, 2vw, 19px); line-height: 1.65; }
.hero-status {
  position: relative;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: linear-gradient(155deg, rgba(15, 32, 53, .78), rgba(7, 15, 27, .56));
  overflow: hidden;
}
.hero-status::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 0%, rgba(73, 229, 255, .10), transparent 45%);
  pointer-events: none;
}
.hero-status small { display: block; color: var(--muted-2); font-size: 9px; font-weight: 800; letter-spacing: .17em; text-transform: uppercase; }
.hero-status strong { display: block; margin-top: 9px; font-size: 18px; }
.hero-status__signal { margin-top: 18px; display: flex; align-items: center; gap: 9px; color: var(--green); font-size: 10px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.hero-status__signal i { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 14px rgba(104, 236, 194, .8); }

.content-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 54px; align-items: start; padding-top: 54px; }
.content-layout--support { grid-template-columns: minmax(0, 1fr) 330px; }
.content-main { min-width: 0; }
.sidebar { position: sticky; top: 112px; }
.side-card {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(7, 15, 28, .62);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.025);
}
.side-card + .side-card { margin-top: 14px; }
.side-card small { display: block; color: var(--muted-2); font-size: 9px; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
.side-card strong { display: block; margin: 6px 0 10px; font-size: 15px; }
.side-card p { margin: 0; color: var(--muted); font-size: 13px; }
.side-card a { display: inline-block; margin-top: 12px; font-size: 13px; font-weight: 750; }

.section-card {
  position: relative;
  margin-bottom: 18px;
  padding: 30px 32px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(145deg, rgba(10, 23, 40, .75), rgba(5, 12, 22, .62));
  overflow: hidden;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.022);
}
.section-card::after {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 90px;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), transparent);
  opacity: .6;
}
.section-card h2 { font-size: clamp(22px, 3vw, 29px); line-height: 1.15; }
.section-card p { margin: 14px 0 0; color: #afc0ce; }
.section-card ul { margin: 16px 0 0; padding-left: 20px; color: #afc0ce; }
.section-card li + li { margin-top: 6px; }
.section-card strong { color: #eefaff; }

.support-actions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin-top: 26px; }
.action-card {
  min-height: 154px;
  padding: 23px;
  border: 1px solid var(--line);
  border-radius: 21px;
  background: linear-gradient(145deg, rgba(11, 28, 48, .73), rgba(6, 15, 27, .60));
  text-decoration: none;
  transition: transform .2s ease, border-color .2s ease, background .2s ease;
}
.action-card:hover { transform: translateY(-2px); border-color: var(--line-strong); background: rgba(12, 30, 50, .86); }
.action-card small { color: var(--muted-2); font-size: 9px; font-weight: 800; letter-spacing: .15em; text-transform: uppercase; }
.action-card strong { display: block; margin-top: 13px; color: #fff; font-size: 18px; }
.action-card span { display: block; margin-top: 8px; color: var(--muted); font-size: 13px; line-height: 1.55; }

.notice {
  margin-top: 18px;
  padding: 18px 20px;
  border-left: 2px solid var(--cyan);
  border-radius: 0 15px 15px 0;
  color: #aebfcd;
  background: rgba(73, 229, 255, .045);
  font-size: 13px;
}

.toc { list-style: none; margin: 15px 0 0; padding: 0; }
.toc li + li { margin-top: 7px; }
.toc a { color: var(--muted); text-decoration: none; font-size: 12px; line-height: 1.45; }
.toc a:hover { color: var(--cyan-soft); }

.page-footer {
  width: min(calc(100% - 36px), var(--max));
  margin: 0 auto;
  padding: 28px 0 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 26px;
  border-top: 1px solid rgba(110, 187, 235, .10);
  color: var(--muted-2);
  font-size: 10px;
  font-weight: 750;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.page-footer img { width: 185px; opacity: .72; }
.page-footer__links { display: flex; gap: 17px; flex-wrap: wrap; justify-content: flex-end; }
.page-footer a { color: var(--muted-2); text-decoration: none; }
.page-footer a:hover { color: #fff; }

@media (max-width: 900px) {
  .page-hero { grid-template-columns: 1fr; gap: 32px; }
  .hero-status { max-width: 420px; }
  .content-layout, .content-layout--support { grid-template-columns: 1fr; }
  .sidebar { position: static; order: -1; }
  .toc-card { display: none; }
}
@media (max-width: 620px) {
  .site-bar__inner, .page-shell, .page-footer { width: min(calc(100% - 24px), var(--max)); }
  .site-bar__inner { min-height: 70px; }
  .brand img { width: 174px; }
  .site-bar__nav > a { display: none; }
  .site-bar__tag { font-size: 8px; }
  .page-shell { padding: 62px 0 64px; }
  .page-hero { padding-bottom: 40px; }
  .content-layout { padding-top: 40px; gap: 34px; }
  .section-card { padding: 24px 21px; border-radius: 20px; }
  .support-actions { grid-template-columns: 1fr; }
  .page-footer { align-items: flex-start; flex-direction: column; }
  .page-footer__links { justify-content: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .001ms !important; }
}