Page headers: expand body to 3 sentences; add ScrollDownCTA component

Each header section now has tagline + 3 body sentences + CTA.
ScrollDownCTA provides a "Read more" scroll-to-next-section button
with a downward-arrow icon for pages that don't need a direct action.

Author: MMesch

src/components/layout/ScrollDownCTA.tsx

@@ -0,0 +1,16 @@
+import React from "react";
+
+export default function ScrollDownCTA({ label = "Read more" }: { label?: string }) {
+  return (
+    <button
+      className="link-to-button"
+      onClick={() => window.scrollBy({ top: window.innerHeight, behavior: "smooth" })}
+      style={{ display: "inline-flex", alignItems: "center", gap: "8px", cursor: "pointer", background: "none", border: "none", padding: 0 }}
+    >
+      {label}
+      <svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
+        <path d="M8 3v10M4 9l4 4 4-4" stroke="currentColor" strokeWidth="1.8" strokeLinecap="round" strokeLinejoin="round" />
+      </svg>
+    </button>
+  );
+}

src/pages/blog.tsx

@@ -13,7 +13,7 @@ export default function BlogPage(): JSX.Element {
         <h1>Featured posts by QuantStack contributors</h1>
         <p className="page-tagline">From the maintainers, at the source.</p>
         <p>
-          Technical deep-dives, release notes, and perspectives from the people who wrote the code. Read about the decisions, trade-offs, and discoveries that go into the tools powering modern science.
+          Technical deep-dives, release notes, and perspectives from the people who wrote the code. Read about the decisions, trade-offs, and discoveries that go into the tools powering modern science. From Mamba's solver design to JupyterLab's real-time collaboration protocol — these posts come from the engineers who made the calls.
         </p>
         <a href={"/atom.xml"} className="link-to-button" style={{ display: "inline-flex", alignItems: "center", gap: "8px" }}>
           <AtomOrange width={"20px"} height={"20px"} />

src/pages/careers.tsx

@@ -58,7 +58,7 @@ function CareersContent() {
       <Section pageTop fullHeight bg="yellow">
         <h1>Join the QuantStack team.</h1>
         <p className="page-tagline">Your code will reach millions. Your contributions go upstream.</p>
-        <p>We are ~30 researchers and engineers building the infrastructure of scientific computing. This is not a support role — it's a principal contributor role from day one.</p>
+        <p>We are ~30 researchers and engineers building the infrastructure of scientific computing. This is not a support role — it's a principal contributor role from day one. Most of us have PhDs or deep research backgrounds, and every one of us ships code upstream.</p>
         <Link className="link-to-button" href="/contact">Get in touch</Link>
       </Section>
 

src/pages/projects.tsx

@@ -25,6 +25,8 @@ function ProjectsContent() {
         <p className={styles.header_text}>
           From interactive environments to package managers to data formats — we build in the open
           so that anyone can build on what we create.
+          Our tools are dependencies of dependencies — the foundation powering research pipelines, commercial data stacks, and classroom notebooks at scale.
+          Everything we make is open-source, community-governed, and maintained for the long term.
         </p>
         <LinkToContact label="Work with us" />
       </Section>

src/pages/services.tsx

@@ -22,6 +22,7 @@ function ServicesContent() {
           Bloomberg, AWS, Safran, ESA, and the Gates Foundation work with us because there is
           no shortcut to deep expertise. Whether you need a support retainer, a custom feature,
           or a long-term engineering partner — you talk to the people who wrote the code.
+          No account managers, no escalation queues.
         </p>
         <LinkToContact label="Get in touch" />
       </Section>

src/pages/sponsor.tsx

@@ -13,7 +13,7 @@ export function FundableContent() {
       <Section pageTop fullHeight bg="yellow">
         <h1>Sponsor open-source work</h1>
         <p className="page-tagline">Back the features the scientific community needs.</p>
-        <p>High-demand open-source features with detailed plans already in place — the work is scoped, the need is proven, only funding is missing. Back a project and get it shipped.</p>
+        <p>High-demand open-source features with detailed plans already in place — the work is scoped, the need is proven, only funding is missing. Sponsoring through QuantStack means your investment lands upstream and benefits the entire ecosystem. Back a project and get it shipped.</p>
         <LinkToContact label="Get in touch" />
       </Section>
       <SectionSeparator variant={3} />