:root {
  --bg: #eef2f7;
  --ink: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --accent: #1d4ed8;
  --panel: #ffffff;
  font-size: 16px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(1100px 480px at 8% -8%, rgba(29, 78, 216, 0.12), transparent 55%),
    radial-gradient(900px 420px at 95% 0%, rgba(15, 118, 110, 0.08), transparent 50%),
    var(--bg);
  color: var(--ink);
  line-height: 1.6;
}
.skip-link {
  position: absolute; left: -999px;
  background: var(--accent); color: #fff; padding: 8px 12px; z-index: 10; border-radius: 8px;
}
.skip-link:focus { left: 8px; top: 8px; }

.site-header {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 14px 28px; background: rgba(255,255,255,.86); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand .logo {
  width: 38px; height: 38px; border-radius: 11px; display: grid; place-items: center;
  background: linear-gradient(145deg, #1e3a8a, #1d4ed8); color: #fff; font-weight: 700;
}
.brand strong { display: block; font-size: 15px; letter-spacing: .01em; }
.brand small { color: var(--muted); font-size: 11px; letter-spacing: .04em; text-transform: uppercase; }
.site-nav { display: flex; gap: 16px; flex-wrap: wrap; align-items: center; }
.site-nav a { color: var(--muted); text-decoration: none; font-size: 14px; }
.site-nav a:hover { color: var(--ink); }
.site-nav .repo {
  background: var(--ink); color: #fff !important; padding: 7px 14px; border-radius: 999px; font-size: 13px;
}

main { max-width: 1040px; margin: 0 auto; padding: 32px 20px 72px; }

.hero {
  display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 32px; align-items: center;
  background: linear-gradient(155deg, #0b1224 0%, #152a4a 48%, #1d4ed8 145%);
  color: #fff; border-radius: 24px; padding: 40px 36px;
  box-shadow: 0 28px 60px rgba(15, 23, 42, 0.22);
}
.eyebrow {
  margin: 0 0 12px; font-size: 12px; letter-spacing: .12em; text-transform: uppercase;
  opacity: .72; font-weight: 600;
}
.hero h1 {
  margin: 0 0 16px; font-size: 40px; line-height: 1.12; letter-spacing: -0.03em; font-weight: 750;
}
.lede { margin: 0 0 16px; opacity: .92; font-size: 16px; max-width: 34em; }
.disclaimer {
  display: inline-block; margin: 0 0 22px; padding: 9px 12px; border-radius: 10px;
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.12); font-size: 13px;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.button {
  display: inline-block; text-decoration: none; border-radius: 12px;
  padding: 12px 20px; font-weight: 700; font-size: 14px; cursor: pointer; border: 1px solid transparent;
}
.button-primary { background: #fff; color: var(--ink); }
.button-primary:hover { background: #e8eefc; }
.button-secondary {
  background: rgba(255,255,255,.12); color: #fff; border-color: rgba(255,255,255,.18);
  font: inherit; font-weight: 700;
}
.button-secondary:hover { background: rgba(255,255,255,.2); }
.status { min-height: 1.2em; color: #a7f3d0; font-size: 13px; margin: 12px 0 0; }
.stamp { margin: 6px 0 0; font-size: 12px; opacity: .65; }
.stamp code { background: rgba(255,255,255,.12); padding: 2px 8px; border-radius: 6px; }

.hero-card { display: flex; justify-content: center; }
.fake-window {
  width: 100%; max-width: 350px; background: #fff; color: var(--ink);
  border-radius: 16px; overflow: hidden;
  box-shadow: 0 20px 50px rgba(0,0,0,.28);
  transform: rotate(1.2deg);
}
.fake-top {
  display: flex; align-items: center; gap: 6px;
  background: #0f172a; color: #fff; padding: 10px 12px; font-size: 12px;
}
.fake-top .dot { width: 8px; height: 8px; border-radius: 50%; background: #475569; }
.fake-top .dot:nth-child(1) { background: #f87171; }
.fake-top .dot:nth-child(2) { background: #fbbf24; }
.fake-top .dot:nth-child(3) { background: #34d399; }
.fake-top em { margin-left: 6px; font-style: normal; opacity: .9; }
.fake-tabs {
  display: flex; gap: 8px; padding: 10px 12px 0; background: #f8fafc;
  font-size: 12px; border-bottom: 1px solid var(--line);
}
.fake-tabs span {
  padding: 6px 12px; border-radius: 8px 8px 0 0; color: var(--muted); background: #eef2f7;
}
.fake-tabs .on { background: #fff; color: var(--ink); font-weight: 700; box-shadow: 0 -2px 0 #1d4ed8 inset; }
.fake-stats {
  display: flex; gap: 6px; padding: 10px 12px; background: #fff; border-bottom: 1px solid var(--line);
}
.fake-stats span {
  background: #eef2ff; color: #1e3a8a; border-radius: 999px; padding: 2px 8px; font-size: 11px;
}
.fake-tree { padding: 10px 12px; font-size: 12px; min-height: 160px; }
.fake-tree .n { padding: 3px 0; }
.fake-tree .folder { font-weight: 700; color: #1e293b; margin-top: 4px; }
.fake-tree .file { color: #475569; }
.fake-foot {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 12px; border-top: 1px solid var(--line); background: #fcfdff; font-size: 12px;
}
.fake-foot b {
  background: #0f766e; color: #fff; border-radius: 8px; padding: 5px 10px; font-size: 12px;
}

.section { margin-top: 48px; }
.section h2 { margin: 0 0 18px; font-size: 24px; letter-spacing: -0.02em; }
.steps {
  background: var(--panel); border: 1px solid var(--line); border-radius: 16px;
  padding: 20px 20px 20px 40px; margin: 0;
}
.steps li { margin: 10px 0; }

.install-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px; align-items: stretch;
}
.tutorial {
  background: var(--panel); border: 1px solid var(--line); border-radius: 16px;
  padding: 18px;
}
.tutorial h3 { margin: 0 0 6px; font-size: 15px; }
.tutorial .cap { margin: 0 0 12px; color: var(--muted); font-size: 13px; }
.demo {
  position: relative; height: 220px; border-radius: 12px; overflow: hidden;
  background: linear-gradient(180deg, #eef2ff 0%, #f8fafc 100%);
  border: 1px solid var(--line);
}
.demo-bar {
  height: 34px; background: #1e293b; display: flex; align-items: center;
  padding: 0 12px; gap: 8px; color: #cbd5e1; font-size: 11px;
}
.demo-bar .dots { display: flex; gap: 5px; }
.demo-bar .dots i {
  width: 8px; height: 8px; border-radius: 50%; background: #64748b; display: block;
}
.demo-bookmarks {
  height: 32px; background: #334155; display: flex; align-items: center;
  padding: 0 12px; gap: 8px;
}
.demo-bookmarks .bm-label { color: #94a3b8; font-size: 11px; }
.demo-bm-target {
  width: 120px; height: 22px; border: 1px dashed #64748b; border-radius: 4px;
  display: flex; align-items: center; justify-content: center;
  color: transparent; font-size: 11px; font-weight: 600;
}
.demo-bm-target.filled {
  border-style: solid; border-color: #60a5fa; background: #1d4ed8; color: #fff;
}
.demo-body { padding: 18px; }
.demo-btn {
  display: inline-flex; align-items: center; gap: 6px;
  background: #1d4ed8; color: #fff; border-radius: 10px;
  padding: 10px 14px; font-size: 13px; font-weight: 700;
  box-shadow: 0 8px 18px rgba(29, 78, 216, 0.25);
}
.demo-btn .grip { opacity: .7; letter-spacing: -1px; }
.demo-cursor {
  position: absolute; width: 18px; height: 18px; pointer-events: none;
  left: 40px; top: 120px;
}
.demo-cursor svg { display: block; width: 18px; height: 18px; filter: drop-shadow(0 1px 2px rgba(0,0,0,.35)); }
.demo-steps { display: flex; gap: 8px; margin-top: 12px; flex-wrap: wrap; }
.demo-steps span {
  font-size: 11px; color: var(--muted); background: #f1f5f9;
  border-radius: 999px; padding: 4px 10px;
}
.demo-steps span.on { background: #dbeafe; color: #1d4ed8; font-weight: 700; }

@keyframes drag-btn {
  0%, 8% { transform: translate(0, 0) scale(1); opacity: 1; }
  12% { transform: translate(0, -2px) scale(1.03); }
  38% { transform: translate(110px, -78px) scale(.72); opacity: .95; }
  48% { transform: translate(118px, -86px) scale(.55); opacity: .5; }
  55% { transform: translate(118px, -86px) scale(.4); opacity: 0; }
  56%, 100% { transform: translate(0, 0) scale(1); opacity: 1; }
}
@keyframes drag-cursor {
  0%, 6% { transform: translate(36px, 8px); opacity: 0; }
  10% { transform: translate(36px, 8px); opacity: 1; }
  14% { transform: translate(30px, 4px) scale(.92); }
  38% { transform: translate(130px, -68px) scale(.92); }
  48% { transform: translate(136px, -76px) scale(.92); opacity: 1; }
  58% { transform: translate(136px, -76px); opacity: 0; }
  59%, 100% { transform: translate(36px, 8px); opacity: 0; }
}
@keyframes fill-bm {
  0%, 46% { width: 120px; border-color: #64748b; background: transparent; color: transparent; }
  52% { width: 132px; }
  58%, 88% {
    border-style: solid; border-color: #60a5fa; background: #1d4ed8; color: #fff;
  }
  96%, 100% { width: 120px; border-color: #64748b; background: transparent; color: transparent; }
}
.demo.play .demo-btn { animation: drag-btn 4.5s ease-in-out infinite; }
.demo.play .demo-cursor { animation: drag-cursor 4.5s ease-in-out infinite; }
.demo.play .demo-bm-target { animation: fill-bm 4.5s ease-in-out infinite; }
.demo.play .step-1 { animation: step-on 4.5s ease-in-out infinite; }
.demo.play .step-2 { animation: step-on 4.5s ease-in-out infinite 1.2s; }
.demo.play .step-3 { animation: step-on 4.5s ease-in-out infinite 2.6s; }
@keyframes step-on {
  0%, 100% { background: #f1f5f9; color: var(--muted); font-weight: 500; }
  10%, 40% { background: #dbeafe; color: #1d4ed8; font-weight: 700; }
}

.hint { color: var(--muted); font-size: 13px; margin-top: 12px; }
code, kbd { background: #e2e8f0; border-radius: 5px; padding: 1px 6px; font-size: 12px; }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.feature {
  background: var(--panel); border: 1px solid var(--line); border-radius: 16px; padding: 20px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.04);
}
.feature h3 { margin: 0 0 8px; font-size: 15px; }
.feature p { margin: 0; color: var(--muted); font-size: 14px; }

.table-scroll {
  overflow: auto; background: var(--panel); border: 1px solid var(--line); border-radius: 16px;
}
table { border-collapse: collapse; width: 100%; }
th, td { text-align: left; padding: 14px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
thead th { background: #f8fafc; font-size: 13px; color: var(--muted); font-weight: 600; }
tbody th { font-weight: 650; width: 32%; }

details {
  background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
  padding: 14px 16px; margin: 10px 0;
}
details summary { cursor: pointer; font-weight: 650; }
details p { margin: 10px 0 0; color: var(--muted); }

.site-footer {
  text-align: center; color: var(--muted); font-size: 13px; padding: 28px 16px 48px;
}
.site-footer a { color: var(--accent); }

@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; }
  .hero h1 { font-size: 30px; }
  .grid { grid-template-columns: 1fr 1fr; }
  .install-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .grid { grid-template-columns: 1fr; }
  .site-nav .repo { display: none; }
}