/* ===== 葬AI Web4 — Retro-Futurist Design System ===== */
:root{
  --bg:#0b0910;
  --bg-2:#110d1a;
  --card:#15111f;
  --card-2:#1b1528;
  --fg:#ece6f8;
  --fg-dim:#b8aecd;
  --muted:#7d7494;
  --primary:#8b5cf6;
  --primary-2:#a78bfa;
  --primary-glow:rgba(139,92,246,.45);
  --accent:#f0438c;
  --accent-2:#ff6bb0;
  --cyan:#22d3ee;
  --amber:#fbbf24;
  --green:#34d399;
  --border:#2a2340;
  --border-2:#3a3158;
  --mono:"SFMono-Regular",ui-monospace,"Cascadia Code","JetBrains Mono",Menlo,Consolas,monospace;
  --sans:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Segoe UI",Roboto,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{
  background:var(--bg);
  color:var(--fg);
  font-family:var(--sans);
  line-height:1.75;
  font-size:15px;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
/* layered ambient background */
body::before{
  content:"";position:fixed;inset:0;z-index:-2;
  background:
    radial-gradient(1200px 800px at 80% -10%,rgba(139,92,246,.16),transparent 60%),
    radial-gradient(900px 700px at -10% 110%,rgba(240,67,140,.12),transparent 60%),
    var(--bg);
}
body::after{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.5;
  background-image:
    linear-gradient(rgba(139,92,246,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(139,92,246,.04) 1px,transparent 1px);
  background-size:42px 42px;
  mask-image:radial-gradient(ellipse 100% 80% at 50% 0%,#000 40%,transparent 100%);
}
a{color:var(--primary-2);text-decoration:none;transition:color .15s}
a:hover{color:var(--accent-2)}
img{max-width:100%}

/* ===== NAVBAR ===== */
.nav{
  position:sticky;top:0;z-index:100;
  height:3.25rem;display:flex;align-items:center;
  background:rgba(11,9,16,.82);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);
}
.nav-inner{width:100%;max-width:1180px;margin:0 auto;padding:0 1.25rem;display:flex;align-items:center;gap:2rem}
.brand{display:flex;align-items:center;gap:.6rem;font-family:var(--mono);font-weight:700;letter-spacing:.02em;color:var(--fg)}
.brand:hover{color:var(--fg)}
.brand .logo-mark{
  width:1.6rem;height:1.6rem;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  color:#0b0910;font-size:.8rem;font-weight:900;
  box-shadow:0 0 14px var(--primary-glow);
}
.brand b{color:var(--primary-2)}
.nav-links{display:flex;gap:1.5rem;margin-left:auto;align-items:center}
.nav-links a{font-size:.85rem;font-family:var(--mono);color:var(--fg-dim);letter-spacing:.03em;text-transform:uppercase}
.nav-links a:hover{color:var(--accent-2)}
.nav-links a.active{color:var(--primary-2)}
.nav-stat{font-family:var(--mono);font-size:.7rem;color:var(--muted)}

/* ===== LAYOUT ===== */
.wrap{max-width:1180px;margin:0 auto;padding:2rem 1.25rem 5rem}

/* ===== HOME ===== */
.hero{min-height:calc(100vh - 3.25rem);display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:3rem 1.25rem;position:relative}
.hero .tagline-top{font-family:var(--mono);font-size:.72rem;letter-spacing:.35em;color:var(--accent);text-transform:uppercase;margin-bottom:1.5rem;opacity:.9}
.hero .tagline-top::before,.hero .tagline-top::after{content:"//";color:var(--muted);margin:0 .5rem}
.hero-title{
  font-family:var(--mono);font-weight:800;
  font-size:clamp(2.6rem,9vw,5.5rem);line-height:1;letter-spacing:-.02em;
  background:linear-gradient(180deg,#fff 0%,var(--primary-2) 50%,var(--accent) 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  filter:drop-shadow(0 0 32px var(--primary-glow));
}
.hero-title .web4{display:inline-block;color:var(--accent);-webkit-text-fill-color:var(--accent)}
.hero-sub{margin-top:1.5rem;max-width:640px;color:var(--fg-dim);font-size:1.02rem;line-height:1.85}
.hero-sub b{color:var(--fg)}
.hero-cursor{display:inline-block;width:.6em;height:1em;background:var(--accent);margin-left:.1em;vertical-align:-.12em;animation:blink 1s steps(2) infinite}
@keyframes blink{50%{opacity:0}}
.stats{display:flex;gap:clamp(1.5rem,5vw,4rem);margin-top:3rem;flex-wrap:wrap;justify-content:center}
.stat{text-align:center}
.stat .num{font-family:var(--mono);font-size:clamp(1.8rem,4vw,2.6rem);font-weight:800;color:var(--primary-2);line-height:1}
.stat .num .plus{color:var(--accent)}
.stat .label{font-family:var(--mono);font-size:.7rem;color:var(--muted);letter-spacing:.12em;text-transform:uppercase;margin-top:.4rem}
.cta-row{display:flex;gap:1rem;margin-top:3rem;flex-wrap:wrap;justify-content:center}
.btn{
  display:inline-flex;align-items:center;gap:.5rem;
  font-family:var(--mono);font-size:.85rem;font-weight:600;letter-spacing:.04em;
  padding:.85rem 1.6rem;border:1.5px solid var(--primary);cursor:pointer;
  transition:all .18s;text-transform:uppercase;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 0 0 0 var(--primary-glow)}
.btn-primary:hover{background:var(--primary-2);box-shadow:0 0 24px var(--primary-glow);color:#fff;transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--fg-dim);border-color:var(--border-2)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent-2);transform:translateY(-2px)}
.hero-foot{position:absolute;bottom:1.5rem;font-family:var(--mono);font-size:.68rem;color:var(--muted);letter-spacing:.05em}

/* feature strip on home */
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.25rem;margin-top:-2rem}
.feature{
  background:linear-gradient(180deg,var(--card),var(--bg-2));
  border:1px solid var(--border);padding:1.6rem;position:relative;overflow:hidden;
  transition:border-color .2s,transform .2s;
}
.feature:hover{border-color:var(--primary);transform:translateY(-3px)}
.feature .ico{font-family:var(--mono);font-size:1.3rem;color:var(--accent);margin-bottom:.6rem}
.feature h3{font-family:var(--mono);font-size:1rem;color:var(--fg);margin-bottom:.4rem}
.feature p{color:var(--fg-dim);font-size:.88rem;line-height:1.7}
.feature::after{content:"";position:absolute;top:0;right:0;width:60px;height:60px;background:radial-gradient(circle at top right,var(--primary-glow),transparent 70%)}

/* ===== SECTION HEADERS ===== */
.section{margin-top:3.5rem}
.section-head{display:flex;align-items:baseline;gap:.75rem;margin-bottom:1.5rem;border-bottom:1px solid var(--border);padding-bottom:.75rem}
.section-head h2{font-family:var(--mono);font-size:1.25rem;font-weight:700;color:var(--fg);letter-spacing:.02em}
.section-head .pre{font-family:var(--mono);color:var(--accent);font-weight:700}
.section-head .meta{margin-left:auto;font-family:var(--mono);font-size:.72rem;color:var(--muted)}

/* ===== GRAPH PAGE ===== */
.graph-shell{display:grid;grid-template-columns:1fr 340px;gap:1.25rem;height:calc(100vh - 3.25rem - 2rem)}
.graph-canvas-wrap{position:relative;background:var(--bg-2);border:1px solid var(--border);overflow:hidden;min-height:480px}
#graphCanvas{display:block;width:100%;height:100%;cursor:grab}
#graphCanvas:active{cursor:grabbing}
.graph-controls{position:absolute;top:.75rem;left:.75rem;display:flex;flex-direction:column;gap:.4rem}
.gc-btn{width:2rem;height:2rem;display:grid;place-items:center;background:rgba(21,17,31,.85);border:1px solid var(--border-2);color:var(--fg-dim);font-family:var(--mono);font-size:1rem;cursor:pointer;backdrop-filter:blur(6px);transition:all .15s}
.gc-btn:hover{border-color:var(--primary);color:var(--primary-2)}
.graph-legend{position:absolute;bottom:.75rem;left:.75rem;display:flex;gap:.85rem;flex-wrap:wrap;background:rgba(21,17,31,.8);padding:.5rem .7rem;border:1px solid var(--border);backdrop-filter:blur(6px)}
.legend-item{display:flex;align-items:center;gap:.35rem;font-family:var(--mono);font-size:.68rem;color:var(--fg-dim)}
.legend-dot{width:9px;height:9px}
.graph-hover{position:absolute;pointer-events:none;font-family:var(--mono);font-size:.75rem;background:rgba(21,17,31,.95);border:1px solid var(--primary);padding:.25rem .5rem;color:var(--fg);white-space:nowrap;display:none;z-index:5}

.graph-side{display:flex;flex-direction:column;gap:1rem;overflow:hidden}
.search-box{position:relative}
.search-box input{
  width:100%;background:var(--card);border:1px solid var(--border-2);color:var(--fg);
  font-family:var(--sans);font-size:.85rem;padding:.6rem .8rem .6rem 2rem;outline:none;transition:border-color .15s;
}
.search-box input:focus{border-color:var(--primary)}
.search-box .si{position:absolute;left:.6rem;top:50%;transform:translateY(-50%);color:var(--muted);font-family:var(--mono);font-size:.85rem}
.node-detail{background:var(--card);border:1px solid var(--border);padding:1.1rem;flex:1;overflow-y:auto;min-height:0}
.node-detail .empty{color:var(--muted);font-size:.82rem;text-align:center;padding:2rem 0;font-family:var(--mono)}
.nd-type{display:inline-block;font-family:var(--mono);font-size:.62rem;letter-spacing:.1em;text-transform:uppercase;padding:.15rem .5rem;margin-bottom:.5rem}
.nd-type.product{background:rgba(139,92,246,.18);color:var(--primary-2)}
.nd-type.person{background:rgba(240,67,140,.18);color:var(--accent-2)}
.nd-type.company{background:rgba(34,211,238,.16);color:var(--cyan)}
.nd-type.vc_firm{background:rgba(251,191,36,.16);color:var(--amber)}
.node-detail h3{font-family:var(--mono);font-size:1.1rem;color:var(--fg);margin-bottom:.3rem}
.nd-desc{color:var(--fg-dim);font-size:.84rem;line-height:1.7;margin:.6rem 0}
.nd-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:.5rem;margin:.7rem 0}
.nd-stat{background:var(--bg-2);border:1px solid var(--border);padding:.5rem;text-align:center}
.nd-stat .v{font-family:var(--mono);font-size:1rem;font-weight:700;color:var(--primary-2)}
.nd-stat .k{font-family:var(--mono);font-size:.58rem;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;margin-top:.15rem}
.nd-edges-title{font-family:var(--mono);font-size:.68rem;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;margin:.7rem 0 .4rem}
.nd-edge{font-size:.78rem;padding:.3rem 0;border-bottom:1px dashed var(--border);color:var(--fg-dim)}
.nd-edge .rel{font-family:var(--mono);font-size:.65rem;color:var(--accent);margin-right:.4rem}
.nd-edge a{cursor:pointer}
.nd-aliases{margin-top:.5rem;display:flex;flex-wrap:wrap;gap:.3rem}
.nd-alias{font-family:var(--mono);font-size:.65rem;background:var(--bg-2);border:1px solid var(--border);color:var(--muted);padding:.1rem .35rem}

/* ===== LEADERBOARDS ===== */
.lb-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.25rem}
.lb-card{background:linear-gradient(180deg,var(--card),var(--bg-2));border:1px solid var(--border);overflow:hidden}
.lb-head{display:flex;align-items:center;gap:.5rem;padding:.8rem 1rem;border-bottom:1px solid var(--border);background:var(--card-2)}
.lb-head .lb-ico{font-family:var(--mono);font-size:1rem}
.lb-head h3{font-family:var(--mono);font-size:.82rem;letter-spacing:.06em;text-transform:uppercase;color:var(--fg)}
.lb-head .lb-count{margin-left:auto;font-family:var(--mono);font-size:.68rem;color:var(--muted)}
.lb-list{list-style:none}
.lb-row{display:grid;grid-template-columns:1.8rem 1fr auto;align-items:center;gap:.5rem;padding:.5rem 1rem;border-bottom:1px solid rgba(42,35,64,.5);transition:background .12s}
.lb-row:hover{background:var(--card-2)}
.lb-row:last-child{border-bottom:none}
.lb-rank{font-family:var(--mono);font-size:.72rem;color:var(--muted);text-align:center}
.lb-rank.top{color:var(--accent);font-weight:700}
.lb-name{font-size:.82rem;color:var(--fg);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.lb-name:hover{color:var(--primary-2);cursor:pointer}
.lb-score{font-family:var(--mono);font-size:.7rem;color:var(--primary-2)}
.lb-bar{grid-column:2 / 4;height:2px;background:var(--border);margin-top:.25rem;overflow:hidden}
.lb-bar span{display:block;height:100%;background:linear-gradient(90deg,var(--primary),var(--accent))}

/* ===== ARTICLES LIST ===== */
.tools-bar{display:flex;gap:.75rem;flex-wrap:wrap;align-items:center;margin-bottom:1.5rem}
.filter-chips{display:flex;gap:.5rem;flex-wrap:wrap}
.chip{font-family:var(--mono);font-size:.72rem;padding:.35rem .7rem;border:1px solid var(--border-2);color:var(--fg-dim);background:var(--card);cursor:pointer;transition:all .15s}
.chip:hover{border-color:var(--primary);color:var(--fg)}
.chip.active{background:var(--primary);border-color:var(--primary);color:#fff}
.sort-sel{background:var(--card);border:1px solid var(--border-2);color:var(--fg);font-family:var(--mono);font-size:.75rem;padding:.35rem .6rem;outline:none}
.art-search{flex:1;min-width:200px;position:relative}
.art-search input{width:100%;background:var(--card);border:1px solid var(--border-2);color:var(--fg);font-size:.85rem;padding:.55rem .8rem .55rem 2rem;outline:none}
.art-search input:focus{border-color:var(--primary)}
.art-search .si{position:absolute;left:.6rem;top:50%;transform:translateY(-50%);color:var(--muted);font-family:var(--mono)}
.art-result-count{font-family:var(--mono);font-size:.72rem;color:var(--muted);margin-bottom:1rem}

.art-list{list-style:none;display:flex;flex-direction:column;gap:.6rem}
.art-item{display:grid;grid-template-columns:3.5rem 1fr auto;gap:1rem;align-items:start;padding:1rem 1.1rem;background:var(--card);border:1px solid var(--border);transition:border-color .15s,transform .15s;text-decoration:none;color:inherit}
.art-item:hover{border-color:var(--primary);transform:translateX(4px)}
.art-id{font-family:var(--mono);font-size:1.3rem;font-weight:800;color:var(--primary-2);line-height:1}
.art-id .hash{color:var(--muted);font-weight:400}
.art-body h3{font-size:1rem;color:var(--fg);font-weight:600;margin-bottom:.2rem}
.art-item:hover .art-body h3{color:var(--primary-2)}
.art-excerpt{font-size:.8rem;color:var(--muted);line-height:1.6;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.art-meta{font-family:var(--mono);font-size:.7rem;color:var(--fg-dim);text-align:right;white-space:nowrap}
.art-meta .author{display:block;color:var(--accent-2);margin-bottom:.15rem}
.art-meta .date{color:var(--muted)}
.hidden{display:none!important}

/* ===== ARTICLE DETAIL ===== */
.article-back{display:inline-flex;align-items:center;gap:.4rem;font-family:var(--mono);font-size:.78rem;color:var(--fg-dim);margin-bottom:1.5rem}
.article-back:hover{color:var(--primary-2)}
.article-head{border-bottom:1px solid var(--border);padding-bottom:1.5rem;margin-bottom:2rem}
.article-head .a-id{font-family:var(--mono);font-size:.72rem;color:var(--accent);letter-spacing:.1em}
.article-head h1{font-size:clamp(1.6rem,4vw,2.3rem);font-weight:800;color:var(--fg);margin:.5rem 0 .8rem;line-height:1.3}
.article-head .a-meta{display:flex;gap:1.5rem;flex-wrap:wrap;font-family:var(--mono);font-size:.78rem;color:var(--fg-dim)}
.article-head .a-meta .av{color:var(--accent-2)}
.article-head .a-meta .lbl{color:var(--muted);margin-right:.3rem}
.article-entities{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:1rem}
.ae-tag{font-family:var(--mono);font-size:.66rem;padding:.15rem .45rem;border:1px solid var(--border-2);color:var(--fg-dim)}
.ae-tag.product{border-color:rgba(139,92,246,.4);color:var(--primary-2)}
.ae-tag.person{border-color:rgba(240,67,140,.4);color:var(--accent-2)}
.ae-tag.company{border-color:rgba(34,211,238,.35);color:var(--cyan)}

/* markdown body */
.md-body{font-size:1rem;line-height:1.95;color:var(--fg)}
.md-body h1{font-family:var(--mono);font-size:1.5rem;color:var(--fg);margin:2rem 0 1rem}
.md-body h2{font-family:var(--mono);font-size:1.2rem;color:var(--primary-2);margin:1.8rem 0 .8rem;border-left:3px solid var(--accent);padding-left:.7rem}
.md-body h3{font-family:var(--mono);font-size:1.02rem;color:var(--accent-2);margin:1.4rem 0 .6rem}
.md-body p{margin:.85rem 0}
.md-body strong{color:var(--fg);font-weight:700}
.md-body em{color:var(--accent-2);font-style:normal;border-bottom:1px dashed var(--accent)}
.md-body a{color:var(--cyan);border-bottom:1px solid rgba(34,211,238,.3)}
.md-body a:hover{color:var(--accent-2)}
.md-body ul,.md-body ol{margin:.85rem 0 .85rem 1.4rem}
.md-body li{margin:.35rem 0}
.md-body blockquote{border-left:3px solid var(--primary);background:var(--card);padding:.6rem 1rem;margin:1rem 0;color:var(--fg-dim)}
.md-body hr{border:none;border-top:1px dashed var(--border-2);margin:2rem 0}
.md-body code{font-family:var(--mono);font-size:.85em;background:var(--card-2);border:1px solid var(--border);padding:.1em .35em;color:var(--accent-2)}
.md-body pre{background:var(--bg-2);border:1px solid var(--border);padding:1rem;overflow-x:auto;margin:1rem 0}
.md-body pre code{background:none;border:none;padding:0;color:var(--fg-dim)}
.md-body table{border-collapse:collapse;width:100%;margin:1rem 0;font-size:.88rem}
.md-body th,.md-body td{border:1px solid var(--border);padding:.5rem .7rem;text-align:left}
.md-body th{background:var(--card-2);color:var(--primary-2);font-family:var(--mono);font-size:.8rem}

.article-nav{display:flex;justify-content:space-between;gap:1rem;margin-top:3rem;padding-top:1.5rem;border-top:1px solid var(--border)}
.an-link{display:flex;flex-direction:column;gap:.2rem;max-width:48%}
.an-link.prev{text-align:left}
.an-link.next{text-align:right;margin-left:auto}
.an-link .dir{font-family:var(--mono);font-size:.66rem;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}
.an-link .ttl{font-size:.88rem;color:var(--fg-dim)}
.an-link:hover .ttl{color:var(--primary-2)}

/* ===== FOOTER ===== */
.foot{border-top:1px solid var(--border);padding:2rem 1.25rem;text-align:center;color:var(--muted);font-family:var(--mono);font-size:.72rem;line-height:1.9}
.foot a{color:var(--fg-dim)}
.foot .ai-ctx{margin-top:.8rem;font-size:.62rem;color:var(--border-2);max-width:600px;margin-left:auto;margin-right:auto}

/* ===== RESPONSIVE ===== */
@media(max-width:900px){
  .graph-shell{grid-template-columns:1fr;height:auto}
  .graph-canvas-wrap{height:60vh}
  .graph-side{flex-direction:column}
  .nav-links{gap:1rem}
  .nav-stat{display:none}
}
@media(max-width:600px){
  .nav-links a span.lbl{display:none}
  .art-item{grid-template-columns:2.5rem 1fr;gap:.7rem}
  .art-meta{grid-column:2;text-align:left;margin-top:.3rem}
  .stats{gap:1.5rem}
}