sirius.x: pantheon section + nav link — seven sibling .x names

The seven .x names now on chipnet: silentmode.x, sirius.x, theseus.x,
hephaestus.x, prometheus.x, helios.x, hermes.x. New #pantheon section on
the landing lists each with dot-badge, one-line description, and a link
that goes through the silentmode.st BCNR gateway so every browser reaches
them regardless of resolver install.

index.html

@@ -95,6 +95,7 @@
   <a href="#try">Try it</a>
   <a href="./docs/">📚 Docs</a>
   <a href="./theseus/">🧭 Theseus</a>
+  <a href="#pantheon">Pantheon</a>
   <a href="#roadmap">Roadmap</a>
   <a href="./brand/">🎨 Brand</a>
   <a href="https://silentmode.st/" rel="noopener">Silent Mode ↗</a>
@@ -178,6 +179,56 @@
      enforces this; on chipnet the operator's countersignature is the gate.</div>
 </section>
 
+<section id="pantheon">
+  <h2>The pantheon</h2>
+  <p class="lede">Sirius.x is one of seven sibling <b>.x</b> names — the Silent Mode pantheon.
+     Each project is its own on-chain certificate; each site is reachable through any BCNR
+     resolver, plus the silentmode.st gateway for browsers without one.</p>
+  <div class="grid">
+    <div class="card">
+      <h3><span class="dot d-chain"></span> ⛓️ silentmode.x</h3>
+      <p>The project umbrella. Redirects to <code>silentmode.st</code> where every pillar
+         has its own landing page + download hub.</p>
+      <div class="cta"><a class="btn ghost" href="https://silentmode.st/bns/silentmode.x/" rel="noopener">Open →</a></div>
+    </div>
+    <div class="card">
+      <h3><span class="dot d-chain"></span> ⭐ sirius.x <span class="pill">you're here</span></h3>
+      <p>Names on Bitcoin Cash — register, resolve, verify, manage. This site.</p>
+      <div class="cta"><a class="btn ghost" href="./">Home →</a></div>
+    </div>
+    <div class="card">
+      <h3><span class="dot d-chain"></span> 🧭 theseus.x</h3>
+      <p>The browser that speaks BCNR natively — Chromium build with the resolver baked in,
+         no OS-level daemon or root-store install.</p>
+      <div class="cta"><a class="btn ghost" href="./theseus/">Learn more →</a></div>
+    </div>
+    <div class="card">
+      <h3><span class="dot d-srv"></span> 🔥 hephaestus.x</h3>
+      <p>The forge. Forgejo instance for the ecosystem's git repos, backed by BCH wallet
+         auth. Sirius's own source lives here.</p>
+      <div class="cta"><a class="btn ghost" href="https://code.silentmode.st/" rel="noopener">Open →</a></div>
+    </div>
+    <div class="card">
+      <h3><span class="dot d-sia"></span> 🔮 prometheus.x</h3>
+      <p>Fire from the chain. The project's foresight / experimentation layer.
+         Redirects to <code>silentmode.st/prometheus/</code> today.</p>
+      <div class="cta"><a class="btn ghost" href="https://silentmode.st/bns/prometheus.x/" rel="noopener">Open →</a></div>
+    </div>
+    <div class="card">
+      <h3><span class="dot d-sia"></span> ☀️ helios.x</h3>
+      <p>The public gaze. Analytics, dashboards, transparency reports.
+         Redirects to <code>silentmode.st/helios/</code> today.</p>
+      <div class="cta"><a class="btn ghost" href="https://silentmode.st/bns/helios.x/" rel="noopener">Open →</a></div>
+    </div>
+    <div class="card">
+      <h3><span class="dot d-srv"></span> ✉️ hermes.x</h3>
+      <p>Messenger. Nostr-based messaging bound to a BCNR name via the <code>np</code>
+         + <code>nr</code> records. Redirects to <code>silentmode.st/hermes/</code>.</p>
+      <div class="cta"><a class="btn ghost" href="https://silentmode.st/bns/hermes.x/" rel="noopener">Open →</a></div>
+    </div>
+  </div>
+</section>
+
 <section id="roadmap">
   <h2>What's coming</h2>
   <p class="lede">sirius.x consolidates docs and registration today; three larger pieces are on the roadmap.</p>