:root {
  --bg: #080d18;
  --panel: #111827;
  --panel2: #161f32;
  --text: #f7f9fc;
  --muted: #aab4c5;
  --brand: #ffcf1b;
  --brand2: #ffb300;
  --line: rgba(255,255,255,.11);
  --max: 1180px;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family: -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}
a {
  color: inherit;
  text-decoration: none;
}
img {
  max-width: 100%;
  display: block;
}
.container {
  width: min(var(--max), calc(100% - 36px));
  margin: 0 auto;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(18px);
  background: rgba(8,13,24,.88);
  border-bottom: 1px solid var(--line);
}
.nav {
  min-height: 72px;
  display:flex;
  align-items:center;
  gap:32px;
  justify-content:space-between;
}
.brand img {
  width: 206px;
  height:auto;
}
.nav-links {
  display:flex;
  gap:26px;
  align-items:center;
  font-size:14px;
}
.nav-links a:hover {
  color: var(--brand);
}
.nav-cta {
  padding:10px 18px;
  border-radius:12px;
  background:var(--brand);
  color:#171717;
  font-weight:800;
}
.hero {
  position:relative;
  min-height: 610px;
  display:grid;
  align-items:center;
  overflow:hidden;
  background:#0b1120;
}
.hero::before {
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,rgba(5,10,20,.94) 0%,rgba(5,10,20,.78) 37%,rgba(5,10,20,.16) 68%,rgba(5,10,20,.48) 100%);
  z-index:1;
}
.hero-bg {
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
}
.hero-content {
  position:relative;
  z-index:2;
  max-width:610px;
  padding:84px 0;
}
.hero-eyebrow {
  color:var(--brand);
  font-weight:800;
  letter-spacing:.08em;
}
h1 {
  font-size: clamp(46px,7vw,82px);
  line-height:1.04;
  margin:12px 0 18px;
  letter-spacing:-.04em;
}
.hero-lead {
  font-size:21px;
  color:#e4e9f1;
  margin:0 0 28px;
}
.button-row {
  display:flex;
  flex-wrap:wrap;
  gap:12px;
}
.btn {
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:14px 22px;
  border-radius:14px;
  font-weight:800;
  border:1px solid var(--line);
}
.btn-primary {
  background:var(--brand);
  color:#111;
  border-color:var(--brand);
}
.btn-secondary {
  background:rgba(255,255,255,.08);
}
.hero-meta {
  display:flex;
  flex-wrap:wrap;
  gap:18px;
  color:#bcc5d4;
  margin-top:20px;
  font-size:14px;
}
.trust-strip {
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  background:#0b1220;
}
.trust-grid {
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:18px;
  padding:22px 0;
}
.trust-item strong {
  display:block;
  color:#fff;
}
.trust-item span {
  color:var(--muted);
  font-size:13px;
}
.section {
  padding:82px 0;
}
.section-muted {
  background:#0d1422;
}
.section-head {
  max-width:760px;
  margin-bottom:34px;
}
.kicker {
  color:var(--brand);
  font-weight:800;
  text-transform:uppercase;
  font-size:13px;
  letter-spacing:.12em;
}
h2 {
  font-size:clamp(30px,4vw,48px);
  line-height:1.18;
  margin:8px 0 12px;
}
.section-head p, .muted {
  color:var(--muted);
}
.feature-grid {
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
}
.card {
  background:linear-gradient(180deg,#121c2d,#0e1624);
  border:1px solid var(--line);
  border-radius:22px;
  overflow:hidden;
  box-shadow:0 18px 48px rgba(0,0,0,.2);
}
.card img {
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
}
.card-body {
  padding:22px;
}
.card h3 {
  margin:0 0 9px;
  font-size:21px;
}
.card p {
  margin:0;
  color:var(--muted);
}
.download-panel {
  display:grid;
  grid-template-columns:1.1fr .9fr;
  gap:26px;
  align-items:stretch;
}
.download-box {
  background:linear-gradient(135deg,#18253c,#101725);
  border:1px solid var(--line);
  border-radius:26px;
  padding:34px;
}
.download-box ul {
  color:var(--muted);
  padding-left:20px;
}
.version-tag {
  display:inline-block;
  padding:6px 10px;
  border-radius:999px;
  background:rgba(255,207,27,.14);
  color:var(--brand);
  font-size:13px;
  font-weight:800;
}
.article-list {
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:18px;
}
.article-teaser {
  padding:22px;
  border-radius:18px;
  border:1px solid var(--line);
  background:#101827;
}
.article-teaser time {
  color:var(--brand);
  font-size:13px;
}
.article-teaser h3 {
  margin:8px 0;
}
.article-teaser p {
  color:var(--muted);
  font-size:14px;
}
.site-footer {
  border-top:1px solid var(--line);
  padding:42px 0 28px;
  background:#070b14;
}
.footer-grid {
  display:grid;
  grid-template-columns:1.2fr 1fr 1fr;
  gap:28px;
}
.footer-logo {
  width:190px;
  margin-bottom:15px;
}
.footer-links a {
  display:block;
  color:var(--muted);
  margin:6px 0;
}
.copyright {
  margin-top:28px;
  padding-top:20px;
  border-top:1px solid var(--line);
  color:#7f8a9b;
  font-size:13px;
}
.breadcrumbs {
  padding:22px 0 0;
  color:#8e99aa;
  font-size:14px;
}
.article-wrap {
  max-width:900px;
  margin:0 auto;
  padding:34px 0 80px;
}
.article-wrap h1 {
  font-size:clamp(34px,5vw,58px);
  letter-spacing:-.03em;
}
.article-meta {
  display:flex;
  flex-wrap:wrap;
  gap:16px;
  color:#9aa5b6;
  font-size:14px;
  padding-bottom:20px;
  border-bottom:1px solid var(--line);
}
.article-hero {
  margin:28px 0;
  border-radius:24px;
  overflow:hidden;
  border:1px solid var(--line);
}
.article-content {
  font-size:17px;
  color:#e3e8f0;
}
.article-content h2 {
  font-size:30px;
  margin-top:42px;
}
.article-content h3 {
  font-size:22px;
  margin-top:28px;
}
.article-content p {
  margin:17px 0;
}
.article-content li {
  margin:8px 0;
}
.note {
  padding:18px 20px;
  border-left:4px solid var(--brand);
  background:#121b2b;
  border-radius:0 14px 14px 0;
  color:#cbd4e1;
}
.steps {
  counter-reset:step;
  list-style:none;
  padding:0;
}
.steps li {
  counter-increment:step;
  position:relative;
  padding:16px 18px 16px 62px;
  background:#101827;
  border:1px solid var(--line);
  border-radius:16px;
  margin:12px 0;
}
.steps li::before {
  content:counter(step);
  position:absolute;
  left:18px;
  top:15px;
  width:30px;
  height:30px;
  border-radius:9px;
  display:grid;
  place-items:center;
  background:var(--brand);
  color:#111;
  font-weight:900;
}
.table-scroll {
  overflow-x:auto;
}
table {
  width:100%;
  border-collapse:collapse;
  margin:20px 0;
}
th,td {
  padding:13px 15px;
  border:1px solid var(--line);
  text-align:left;
}
th {
  background:#151e2f;
}
.source-box, .author-box {
  margin-top:36px;
  padding:22px;
  border:1px solid var(--line);
  background:#0e1624;
  border-radius:18px;
}
.related {
  margin-top:44px;
}
.related-grid {
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:14px;
}
.related a {
  padding:14px;
  border:1px solid var(--line);
  border-radius:14px;
  background:#101827;
}
@media (max-width: 900px) {
  .nav-links {
    display:none;
  }
  .feature-grid,.article-list {
    grid-template-columns:1fr 1fr;
  }
  .download-panel,.footer-grid {
    grid-template-columns:1fr;
  }
  .trust-grid {
    grid-template-columns:1fr 1fr;
  }
}
@media (max-width: 620px) {
  .feature-grid,.article-list,.related-grid {
    grid-template-columns:1fr;
  }
  .hero {
    min-height:560px;
  }
  .hero-content {
    padding:64px 0;
  }
  .trust-grid {
    grid-template-columns:1fr;
  }
  .brand img {
    width:175px;
  }
}