:root {
  --bg: #09090b;
  --bg-soft: #111113;
  --bg-card: rgba(24,24,27,0.8);
  --bg-card-hover: rgba(30,30,35,0.9);
  --border: rgba(255,255,255,0.06);
  --border-hover: rgba(255,255,255,0.12);
  --text: #fafafa;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --primary: #3b82f6;
  --primary-hover: #60a5fa;
  --primary-glow: rgba(59,130,246,0.15);
  --primary-glow-strong: rgba(59,130,246,0.25);
  --green: #22c55e;
  --green-bg: rgba(34,197,94,0.1);
  --amber: #f59e0b;
  --amber-bg: rgba(245,158,11,0.1);
  --purple: #a855f7;
  --purple-bg: rgba(168,85,247,0.1);
  --max-w: 1200px;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 15px;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: color var(--transition); }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
.container { width: min(var(--max-w), calc(100% - 48px)); margin: 0 auto; }

/* HEADER */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(9,9,11,0.8);
  backdrop-filter: blur(20px) saturate(1.8);
  -webkit-backdrop-filter: blur(20px) saturate(1.8);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px; gap: 32px;
}
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; letter-spacing: -0.02em; }
.logo-icon {
  width: 32px; height: 32px; border-radius: 8px;
  background: linear-gradient(135deg, var(--primary), var(--purple));
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 800; color: #fff;
  box-shadow: 0 0 20px var(--primary-glow);
}
.nav-links { display: flex; align-items: center; gap: 8px; }
.nav-links a {
  padding: 6px 14px; border-radius: var(--radius-xs); color: var(--text-secondary);
  font-size: 14px; font-weight: 500; transition: all var(--transition);
}
.nav-links a:hover { color: var(--text); background: rgba(255,255,255,0.05); }
.nav-links a.active { color: var(--text); background: rgba(255,255,255,0.08); }
.nav-cta {
  padding: 6px 16px; border-radius: var(--radius-xs);
  background: var(--primary); color: #fff; font-size: 14px; font-weight: 600;
  transition: all var(--transition);
}
.nav-cta:hover { background: var(--primary-hover); transform: translateY(-1px); }
.nav-toggle { display: none; background: none; border: none; color: var(--text); cursor: pointer; padding: 8px; }
.nav-toggle svg { width: 24px; height: 24px; }

/* HERO */
.hero {
  position: relative; padding: 100px 0 80px;
  background: radial-gradient(ellipse 80% 50% at 50% -20%, var(--primary-glow), transparent);
  overflow: hidden;
}
.hero-content { position: relative; z-index: 1; text-align: center; max-width: 800px; margin: 0 auto; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 16px; border-radius: 999px; margin-bottom: 24px;
  background: var(--primary-glow); border: 1px solid rgba(59,130,246,0.2);
  font-size: 13px; font-weight: 600; color: var(--primary-hover);
}
.hero-badge .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--green); animation: pulse 2s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }
.hero h1 {
  font-size: clamp(40px, 7vw, 72px); font-weight: 800; letter-spacing: -0.04em;
  line-height: 1.1; margin-bottom: 20px;
  background: linear-gradient(180deg, #fff 0%, #a1a1aa 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero .lead {
  font-size: 18px; color: var(--text-secondary); max-width: 600px; margin: 0 auto 36px; line-height: 1.7;
}
.hero-actions { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }
.hero-stats {
  display: flex; justify-content: center; gap: 48px; margin-top: 56px;
  padding-top: 40px; border-top: 1px solid var(--border);
}
.hero-stat { text-align: center; }
.hero-stat .num { font-size: 28px; font-weight: 800; color: var(--text); letter-spacing: -0.02em; }
.hero-stat .label { font-size: 13px; color: var(--text-muted); margin-top: 4px; }

/* BUTTONS */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 44px; padding: 0 24px; border-radius: var(--radius-sm);
  font-weight: 600; font-size: 14px; border: none; cursor: pointer;
  transition: all var(--transition); white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--primary); color: #fff;
  box-shadow: 0 0 20px var(--primary-glow), 0 1px 2px rgba(0,0,0,0.3);
}
.btn-primary:hover { background: var(--primary-hover); box-shadow: 0 0 30px var(--primary-glow-strong), 0 4px 12px rgba(0,0,0,0.3); }
.btn-secondary {
  background: rgba(255,255,255,0.05); color: var(--text);
  border: 1px solid var(--border-hover);
}
.btn-secondary:hover { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.2); }
.btn-lg { height: 52px; padding: 0 32px; font-size: 16px; border-radius: var(--radius); }
.btn-block { width: 100%; }
.btn svg { width: 18px; height: 18px; flex-shrink: 0; }

/* SECTIONS */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-soft); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-header { text-align: center; max-width: 640px; margin: 0 auto 48px; }
.section-header .overline {
  font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--primary); margin-bottom: 12px;
}
.section-header h2 {
  font-size: clamp(28px, 4vw, 40px); font-weight: 800; letter-spacing: -0.03em;
  line-height: 1.2; margin-bottom: 16px;
}
.section-header p { color: var(--text-secondary); font-size: 16px; }

/* CARDS */
.card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px; transition: all var(--transition);
}
.card:hover { border-color: var(--border-hover); background: var(--bg-card-hover); }
.card-icon {
  width: 44px; height: 44px; border-radius: 12px; margin-bottom: 16px;
  display: flex; align-items: center; justify-content: center;
}
.card-icon svg { width: 22px; height: 22px; }
.card-icon.blue { background: var(--primary-glow); color: var(--primary); }
.card-icon.green { background: var(--green-bg); color: var(--green); }
.card-icon.amber { background: var(--amber-bg); color: var(--amber); }
.card-icon.purple { background: var(--purple-bg); color: var(--purple); }
.card h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; letter-spacing: -0.01em; }
.card p { color: var(--text-secondary); font-size: 14px; line-height: 1.7; }

/* GRID */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* DOWNLOAD CARD */
.dl-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 36px; position: relative; overflow: hidden;
}
.dl-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--purple));
}
.dl-card .version-tag {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 12px; border-radius: 999px; font-size: 12px; font-weight: 700;
  background: var(--green-bg); color: var(--green); border: 1px solid rgba(34,197,94,0.2);
  margin-bottom: 16px;
}
.dl-card h2 { font-size: 28px; font-weight: 800; letter-spacing: -0.03em; margin-bottom: 24px; }
.dl-meta { display: flex; flex-direction: column; gap: 12px; margin-bottom: 28px; }
.dl-meta-row {
  display: flex; align-items: center; gap: 12px; padding: 10px 14px;
  background: rgba(255,255,255,0.02); border-radius: var(--radius-xs);
  border: 1px solid var(--border);
}
.dl-meta-row .meta-label { font-size: 13px; color: var(--text-muted); min-width: 80px; }
.dl-meta-row .meta-value { font-size: 14px; color: var(--text); font-weight: 500; }
.dl-meta-row .meta-value.mono { font-family: var(--mono); font-size: 12px; word-break: break-all; }
.dl-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* REQUIREMENTS */
.req-list { display: flex; flex-direction: column; gap: 10px; }
.req-item {
  display: flex; align-items: flex-start; gap: 12px; padding: 12px 16px;
  background: rgba(255,255,255,0.02); border-radius: var(--radius-xs);
  border: 1px solid var(--border); font-size: 14px; color: var(--text-secondary);
}
.req-item svg { width: 18px; height: 18px; color: var(--green); flex-shrink: 0; margin-top: 2px; }

/* STEPS */
.steps { display: flex; flex-direction: column; gap: 0; counter-reset: step; }
.step { display: flex; gap: 24px; padding: 28px 0; border-bottom: 1px solid var(--border); }
.step:last-child { border-bottom: none; }
.step-num {
  width: 40px; height: 40px; border-radius: 12px; flex-shrink: 0;
  background: var(--primary-glow); border: 1px solid rgba(59,130,246,0.2);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 800; color: var(--primary);
}
.step-content h3 { font-size: 16px; font-weight: 700; margin-bottom: 6px; }
.step-content p { font-size: 14px; color: var(--text-secondary); }

/* CODE BLOCK */
.code-block {
  background: #0c0c0e; border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 20px; font-family: var(--mono); font-size: 13px; color: #e4e4e7;
  overflow-x: auto; line-height: 1.8; position: relative;
}
.code-block .code-label {
  position: absolute; top: 10px; right: 14px;
  font-size: 11px; color: var(--text-muted); font-family: var(--font);
  text-transform: uppercase; letter-spacing: 0.05em;
}

/* NOTICE */
.notice {
  display: flex; gap: 14px; padding: 16px 20px;
  border-radius: var(--radius-sm); font-size: 14px;
}
.notice svg { width: 20px; height: 20px; flex-shrink: 0; margin-top: 2px; }
.notice-info { background: var(--primary-glow); border: 1px solid rgba(59,130,246,0.15); color: var(--text-secondary); }
.notice-info svg { color: var(--primary); }
.notice-warn { background: var(--amber-bg); border: 1px solid rgba(245,158,11,0.15); color: #fcd68d; }
.notice-warn svg { color: var(--amber); }
.notice-success { background: var(--green-bg); border: 1px solid rgba(34,197,94,0.15); color: #86efac; }
.notice-success svg { color: var(--green); }

/* TABLE */
.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--border); }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 14px 20px; font-size: 14px; }
th { background: rgba(255,255,255,0.03); color: var(--text); font-weight: 600; border-bottom: 1px solid var(--border); }
td { color: var(--text-secondary); border-bottom: 1px solid var(--border); }
tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(255,255,255,0.02); }

/* RELEASE CARD */
.release-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px; position: relative;
}
.release-card.latest { border-color: rgba(59,130,246,0.3); }
.release-card.latest::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--purple));
}
.release-header { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; flex-wrap: wrap; }
.release-header h3 { font-size: 22px; font-weight: 800; letter-spacing: -0.02em; }
.tag {
  display: inline-flex; align-items: center; height: 24px; padding: 0 10px;
  border-radius: 999px; font-size: 12px; font-weight: 600;
}
.tag-stable { background: var(--green-bg); color: var(--green); border: 1px solid rgba(34,197,94,0.2); }
.tag-latest { background: var(--primary-glow); color: var(--primary-hover); border: 1px solid rgba(59,130,246,0.2); }
.tag-date { background: rgba(255,255,255,0.04); color: var(--text-muted); border: 1px solid var(--border); }
.release-body { margin-bottom: 24px; }
.release-body li {
  position: relative; padding-left: 20px; margin-bottom: 8px;
  font-size: 14px; color: var(--text-secondary);
}
.release-body li::before {
  content: ""; position: absolute; left: 0; top: 9px;
  width: 6px; height: 6px; border-radius: 50%; background: var(--primary);
}
.release-footer { display: flex; gap: 12px; flex-wrap: wrap; }

/* HASH */
.hash-display {
  background: #0c0c0e; border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 16px 20px; font-family: var(--mono); font-size: 13px;
  word-break: break-all; color: var(--green); line-height: 1.6; position: relative;
}
.hash-display .hash-label {
  display: block; font-family: var(--font); font-size: 12px;
  color: var(--text-muted); margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.05em;
}

/* CHECKLIST */
.checklist { display: flex; flex-direction: column; gap: 8px; }
.check-item { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--text-secondary); }
.check-item svg { width: 18px; height: 18px; flex-shrink: 0; }
.check-item.done svg { color: var(--green); }
.check-item.pending svg { color: var(--text-muted); }

/* FAQ */
.faq-item { border-bottom: 1px solid var(--border); padding: 24px 0; }
.faq-item:first-child { padding-top: 0; }
.faq-item:last-child { border-bottom: none; }
.faq-item h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; display: flex; align-items: center; gap: 10px; }
.faq-item h3 svg { width: 18px; height: 18px; color: var(--primary); flex-shrink: 0; }
.faq-item p { font-size: 14px; color: var(--text-secondary); padding-left: 28px; }

/* CTA */
.cta-section {
  padding: 80px 0; text-align: center;
  background: radial-gradient(ellipse 60% 50% at 50% 100%, var(--primary-glow), transparent);
}
.cta-section h2 { font-size: clamp(28px, 4vw, 40px); font-weight: 800; letter-spacing: -0.03em; margin-bottom: 16px; }
.cta-section p { color: var(--text-secondary); font-size: 16px; margin-bottom: 32px; max-width: 500px; margin-left: auto; margin-right: auto; }
.cta-actions { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }

/* FOOTER */
.site-footer { border-top: 1px solid var(--border); padding: 48px 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
.footer-brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 16px; margin-bottom: 12px; }
.footer-brand .logo-icon { width: 28px; height: 28px; font-size: 11px; border-radius: 7px; }
.site-footer p { color: var(--text-muted); font-size: 13px; max-width: 280px; line-height: 1.7; }
.footer-col h4 { font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text); margin-bottom: 16px; }
.footer-col a { display: block; font-size: 14px; color: var(--text-muted); padding: 4px 0; transition: color var(--transition); }
.footer-col a:hover { color: var(--text); }
.footer-bottom {
  margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center;
  font-size: 13px; color: var(--text-muted);
}
.footer-bottom-links { display: flex; gap: 20px; }
.footer-bottom-links a { color: var(--text-muted); }
.footer-bottom-links a:hover { color: var(--text); }

/* PAGE HERO */
.page-hero { padding: 80px 0 40px; text-align: center; position: relative; }
.page-hero::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(ellipse 60% 40% at 50% 0%, var(--primary-glow), transparent);
  pointer-events: none;
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 { font-size: clamp(32px, 5vw, 52px); font-weight: 800; letter-spacing: -0.03em; margin-bottom: 16px; }
.page-hero p { color: var(--text-secondary); font-size: 17px; max-width: 640px; margin: 0 auto; }

/* LINK */
.text-link { color: var(--primary); font-weight: 500; }
.text-link:hover { color: var(--primary-hover); text-decoration: underline; }

/* PLATFORM TABS */
.platform-tabs { display: flex; gap: 8px; margin-bottom: 24px; flex-wrap: wrap; }
.platform-tab {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 20px; border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.03); border: 1px solid var(--border);
  font-size: 14px; font-weight: 600; color: var(--text-secondary);
  cursor: pointer; transition: all var(--transition);
}
.platform-tab:hover { border-color: var(--border-hover); color: var(--text); }
.platform-tab.active { background: var(--primary-glow); border-color: rgba(59,130,246,0.3); color: var(--primary-hover); }
.platform-tab svg { width: 18px; height: 18px; }
.platform-tab .coming-soon { font-size: 10px; padding: 2px 6px; border-radius: 999px; background: rgba(255,255,255,0.06); color: var(--text-muted); }

/* RESPONSIVE */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .container { width: calc(100% - 32px); }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero { padding: 72px 0 56px; }
  .hero-stats { flex-direction: column; gap: 24px; }
  .section { padding: 56px 0; }
  .header-inner { height: 56px; }
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .nav-links.open {
    display: flex; flex-direction: column; position: absolute;
    top: 56px; left: 0; right: 0; background: rgba(9,9,11,0.98);
    backdrop-filter: blur(20px); border-bottom: 1px solid var(--border);
    padding: 16px 24px; gap: 4px;
  }
  .nav-links.open a { padding: 12px 16px; border-radius: var(--radius-xs); }
  .dl-card { padding: 24px; }
  .hero-actions { flex-direction: column; align-items: center; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
  .step { flex-direction: column; gap: 12px; }
  .release-header { flex-direction: column; align-items: flex-start; }
  .cta-section { padding: 56px 0; }
}

/* ANIMATIONS */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-in { animation: fadeInUp 0.6s ease-out forwards; }
.animate-delay-1 { animation-delay: 0.1s; opacity: 0; }
.animate-delay-2 { animation-delay: 0.2s; opacity: 0; }
.animate-delay-3 { animation-delay: 0.3s; opacity: 0; }
.animate-delay-4 { animation-delay: 0.4s; opacity: 0; }