From 2d81596f2ce08c5f272d95840b62b16a8e5f44f8 Mon Sep 17 00:00:00 2001
From: Nikita Kuprins <nikita.kuprins@gmail.com>
Date: Sat, 1 Aug 2026 11:45:30 +0300
Subject: [PATCH 1/2] style: redesign homepage hero with brand-colored
 spreadsheet grid

---
 website/src/css/custom.css         |  2 +-
 website/src/pages/index.js         | 32 +++++++++++++++-
 website/src/pages/index.module.css | 61 ++++++++++++++++++++++++++++++
 3 files changed, 93 insertions(+), 2 deletions(-)

diff --git a/website/src/css/custom.css b/website/src/css/custom.css
index 1285023a3..4167f5e34 100644
--- a/website/src/css/custom.css
+++ b/website/src/css/custom.css
@@ -52,7 +52,7 @@
 }
 
 .hero {
-    background: radial-gradient(circle, #00b95f 20%, #69CD37 50%, #14824b 100%);
+    background: linear-gradient(135deg, rgba(0, 0, 0, 0.45) 0%, rgba(0, 0, 0, 0) 100%) #14824b;
 }
 
 .header-github-link::before {
diff --git a/website/src/pages/index.js b/website/src/pages/index.js
index cf1104f89..b96663189 100644
--- a/website/src/pages/index.js
+++ b/website/src/pages/index.js
@@ -27,11 +27,41 @@ import Translate from '@docusaurus/Translate';
 import Heading from '@theme/Heading';
 import styles from './index.module.css';
 
+const GRID_SIZE = 48;
+const COLUMN_COUNT = 50;
+const ROW_COUNT = 14;
+
+function columnLetter(index) {
+    let n = index + 1;
+    let label = '';
+    while (n > 0) {
+        const remainder = (n - 1) % 26;
+        label = String.fromCharCode(65 + remainder) + label;
+        n = Math.floor((n - 1) / 26);
+    }
+    return label;
+}
+
 function HomepageHeader() {
     const {siteConfig} = useDocusaurusContext();
     return (
         <header className={clsx('hero hero--primary', styles.heroBanner)}>
-            <div className="container">
+            <div className={styles.gridOverlay} aria-hidden="true" />
+            <div className={styles.colLabels} aria-hidden="true">
+                {Array.from({length: COLUMN_COUNT}, (_, i) => (
+                    <span key={i} style={{left: i * GRID_SIZE, width: GRID_SIZE}}>
+                        {columnLetter(i)}
+                    </span>
+                ))}
+            </div>
+            <div className={styles.rowLabels} aria-hidden="true">
+                {Array.from({length: ROW_COUNT}, (_, i) => (
+                    <span key={i} style={{top: i * GRID_SIZE, height: GRID_SIZE}}>
+                        {i + 1}
+                    </span>
+                ))}
+            </div>
+            <div className={clsx('container', styles.heroContent)}>
                 <Heading as="h1" className="hero__title">
                     {siteConfig.title}
                 </Heading>
diff --git a/website/src/pages/index.module.css b/website/src/pages/index.module.css
index dead0f1c6..7f38c8ccb 100644
--- a/website/src/pages/index.module.css
+++ b/website/src/pages/index.module.css
@@ -58,3 +58,64 @@
     width: 20px;
     height: 20px;
 }
+
+.gridOverlay {
+    position: absolute;
+    inset: 0;
+    z-index: 0;
+    pointer-events: none;
+    background-image:
+        linear-gradient(rgba(255, 255, 255, 0.07) 1px, transparent 1px),
+        linear-gradient(90deg, rgba(255, 255, 255, 0.07) 1px, transparent 1px);
+    background-size: 48px 48px;
+    -webkit-mask-image: linear-gradient(to bottom, transparent, black 20%, black 80%, transparent);
+    mask-image: linear-gradient(to bottom, transparent, black 20%, black 80%, transparent);
+}
+
+.colLabels,
+.rowLabels {
+    position: absolute;
+    z-index: 0;
+    pointer-events: none;
+    font-family: var(--ifm-font-family-monospace, monospace);
+    font-size: 0.7rem;
+    color: rgba(255, 255, 255, 0.22);
+}
+
+.colLabels {
+    top: 8px;
+    left: 0;
+    height: 16px;
+}
+
+.colLabels span {
+    position: absolute;
+    top: 0;
+    text-align: center;
+}
+
+.rowLabels {
+    top: 0;
+    left: 8px;
+    width: 16px;
+}
+
+.rowLabels span {
+    position: absolute;
+    left: 0;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+}
+
+.heroContent {
+    position: relative;
+    z-index: 2;
+}
+
+@media screen and (max-width: 996px) {
+    .colLabels,
+    .rowLabels {
+        display: none;
+    }
+}

From 4b280632cf8075b58e5c4d65197305edec0d6a3e Mon Sep 17 00:00:00 2001
From: Nikita Kuprins <nikita.kuprins@gmail.com>
Date: Sat, 1 Aug 2026 12:43:28 +0300
Subject: [PATCH 2/2] style: show a Java class and the sheet it writes in the
 homepage hero

---
 website/i18n/en/code.json                     |   6 +
 website/i18n/zh-cn/code.json                  |   6 +
 .../src/components/HeroPlayground/index.js    | 213 +++++++++++++
 .../HeroPlayground/styles.module.css          | 292 ++++++++++++++++++
 website/src/pages/index.js                    |  50 +--
 website/src/pages/index.module.css            |  31 ++
 6 files changed, 576 insertions(+), 22 deletions(-)
 create mode 100644 website/src/components/HeroPlayground/index.js
 create mode 100644 website/src/components/HeroPlayground/styles.module.css

diff --git a/website/i18n/en/code.json b/website/i18n/en/code.json
index 2f6bc3878..e3e336f4c 100644
--- a/website/i18n/en/code.json
+++ b/website/i18n/en/code.json
@@ -8,6 +8,12 @@
   "github": {
     "message": "GitHub"
   },
+  "homepage.playground.hint": {
+    "message": "Every @ExcelProperty becomes a column header."
+  },
+  "homepage.playground.sheet.caption": {
+    "message": "The spreadsheet Fesod writes from the class beside it"
+  },
   "homepage.feature.quick.title": {
     "message": "High-performance"
   },
diff --git a/website/i18n/zh-cn/code.json b/website/i18n/zh-cn/code.json
index e65d040dc..56b2866b6 100644
--- a/website/i18n/zh-cn/code.json
+++ b/website/i18n/zh-cn/code.json
@@ -8,6 +8,12 @@
   "github": {
     "message": "GitHub"
   },
+  "homepage.playground.hint": {
+    "message": "每个 @ExcelProperty 对应一个列标题。"
+  },
+  "homepage.playground.sheet.caption": {
+    "message": "Fesod 依据左侧类写出的电子表格"
+  },
   "homepage.feature.quick.title": {
     "message": "快速"
   },
diff --git a/website/src/components/HeroPlayground/index.js b/website/src/components/HeroPlayground/index.js
new file mode 100644
index 000000000..9a419aa22
--- /dev/null
+++ b/website/src/components/HeroPlayground/index.js
@@ -0,0 +1,213 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import {useState} from 'react';
+import clsx from 'clsx';
+import Translate from '@docusaurus/Translate';
+import styles from './styles.module.css';
+
+const FIELDS = [
+    {
+        key: 'name',
+        type: 'String',
+        header: 'Name',
+        align: 'left',
+        values: ['Ada', 'Lin', 'Sun', 'Rui'],
+    },
+    {
+        key: 'date',
+        type: 'Date',
+        header: 'Date',
+        align: 'right',
+        values: ['2026-07-28', '2026-07-28', '2026-07-29', '2026-07-30'],
+    },
+    {
+        key: 'amount',
+        type: 'Double',
+        header: 'Amount',
+        align: 'right',
+        values: ['0.56', '1.20', '4.80', '2.35'],
+    },
+    /* Annotated @ExcelIgnore, so it never reaches the sheet. */
+    {
+        key: 'note',
+        type: 'String',
+        ignored: true,
+    },
+];
+
+const COLUMNS = FIELDS.filter((field) => !field.ignored);
+const ROW_COUNT = 4;
+
+/* Empty rows below the data, so the pane reads as a sheet rather than stopping short. */
+const FILLER_ROWS = 1;
+
+function columnLetter(index) {
+    return String.fromCharCode(65 + index);
+}
+
+export default function HeroPlayground() {
+    const [activeKey, setActiveKey] = useState(null);
+
+    const link = (key) => ({
+        onMouseEnter: () => setActiveKey(key),
+        onMouseLeave: () => setActiveKey(null),
+    });
+
+    return (
+        <div className={styles.playground}>
+            <div className={styles.panes}>
+                <div className={styles.codePane}>
+                    <div className={styles.paneLabel}>DemoData.java</div>
+                    <pre className={styles.code}>
+                        <code>
+                            <span className={styles.punctuation}>class </span>
+                            DemoData {'{'}
+                            {FIELDS.map((field) => (
+                                <span
+                                    key={field.key}
+                                    className={clsx(
+                                        styles.field,
+                                        activeKey === field.key && styles.fieldActive,
+                                    )}
+                                    {...link(field.key)}>
+                                    <span className={styles.annotationLine}>
+                                        {field.ignored ? (
+                                            <span className={styles.annotation}>@ExcelIgnore</span>
+                                        ) : (
+                                            <>
+                                                <span className={styles.annotation}>
+                                                    @ExcelProperty
+                                                </span>
+                                                {'("'}
+                                                <span className={styles.headerLiteral}>
+                                                    {field.header}
+                                                </span>
+                                                {'")'}
+                                            </>
+                                        )}
+                                    </span>
+                                    <span className={styles.declaration}>
+                                        <span className={styles.punctuation}>private </span>
+                                        {field.type} {field.key};
+                                    </span>
+                                </span>
+                            ))}
+                            {'}'}
+                        </code>
+                    </pre>
+                </div>
+
+                <div className={styles.sheetPane}>
+                    <div className={styles.paneLabel}>demo.xlsx</div>
+                    <div className={styles.sheetScroll}>
+                        <table className={styles.sheet}>
+                            <caption className={styles.srOnly}>
+                                <Translate id="homepage.playground.sheet.caption">
+                                    The spreadsheet Fesod writes from the class beside it
+                                </Translate>
+                            </caption>
+                            <thead>
+                                <tr className={styles.gutterRow}>
+                                    <td className={styles.corner} />
+                                    {COLUMNS.map((field, index) => (
+                                        <td
+                                            key={field.key}
+                                            className={clsx(
+                                                styles.columnLetter,
+                                                activeKey === field.key && styles.columnLetterActive,
+                                            )}>
+                                            {columnLetter(index)}
+                                        </td>
+                                    ))}
+                                </tr>
+                                <tr>
+                                    <td className={styles.rowNumber}>1</td>
+                                    {COLUMNS.map((field) => (
+                                        <th
+                                            key={field.key}
+                                            scope="col"
+                                            className={clsx(
+                                                styles.headerCell,
+                                                activeKey === field.key && styles.cellActive,
+                                            )}
+                                            style={{textAlign: field.align}}
+                                            {...link(field.key)}>
+                                            {field.header}
+                                        </th>
+                                    ))}
+                                </tr>
+                            </thead>
+                            <tbody>
+                                {Array.from({length: ROW_COUNT}, (_, row) => (
+                                    <tr key={row}>
+                                        <td className={styles.rowNumber}>{row + 2}</td>
+                                        {COLUMNS.map((field) => (
+                                            <td
+                                                key={field.key}
+                                                className={clsx(
+                                                    styles.cell,
+                                                    activeKey === field.key && styles.cellActive,
+                                                )}
+                                                style={{textAlign: field.align}}
+                                                {...link(field.key)}>
+                                                {field.values[row]}
+                                            </td>
+                                        ))}
+                                    </tr>
+                                ))}
+                                {Array.from({length: FILLER_ROWS}, (_, row) => (
+                                    <tr key={`filler-${row}`} aria-hidden="true">
+                                        <td className={styles.rowNumber}>
+                                            {ROW_COUNT + row + 2}
+                                        </td>
+                                        {COLUMNS.map((field) => (
+                                            <td
+                                                key={field.key}
+                                                className={clsx(
+                                                    styles.cell,
+                                                    activeKey === field.key && styles.cellActive,
+                                                )}
+                                                {...link(field.key)}>
+                                                &nbsp;
+                                            </td>
+                                        ))}
+                                    </tr>
+                                ))}
+                            </tbody>
+                        </table>
+                    </div>
+                    <div className={styles.sheetTab}>Template</div>
+                </div>
+            </div>
+
+            <div className={styles.statusBar}>
+                <code>
+                    FesodSheet.write(&quot;demo.xlsx&quot;, DemoData.class).sheet(&quot;Template&quot;).doWrite(data());
+                </code>
+            </div>
+
+            <p className={styles.hint}>
+                <Translate id="homepage.playground.hint">
+                    Every @ExcelProperty becomes a column header.
+                </Translate>
+            </p>
+        </div>
+    );
+}
diff --git a/website/src/components/HeroPlayground/styles.module.css b/website/src/components/HeroPlayground/styles.module.css
new file mode 100644
index 000000000..61372a6a3
--- /dev/null
+++ b/website/src/components/HeroPlayground/styles.module.css
@@ -0,0 +1,292 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+/*
+ * The only chromatic value below is the Apache Fesod brand green, #14824b
+ * (R20 G130 B75). Every other value is white or black at some alpha, so the
+ * panel shades itself against the hero instead of introducing a second palette.
+ */
+.playground {
+    --pg-brand: #14824b;
+    --pg-brand-wash: rgba(20, 130, 75, 0.12);
+    --pg-brand-wash-strong: rgba(20, 130, 75, 0.18);
+    --pg-brand-tint: rgba(20, 130, 75, 0.45);
+    --pg-edge: rgba(255, 255, 255, 0.22);
+    --pg-rule: rgba(0, 0, 0, 0.13);
+    --pg-ink: rgba(0, 0, 0, 0.88);
+    --pg-ink-muted: rgba(0, 0, 0, 0.5);
+    --pg-gutter: rgba(0, 0, 0, 0.04);
+
+    /* Infima stripes every second table row; a spreadsheet's cells are uniform,
+       and the stripes fight the column highlight. */
+    --ifm-table-stripe-background: transparent;
+
+    font-family: var(--ifm-font-family-monospace, monospace);
+    text-align: left;
+}
+
+.panes {
+    display: flex;
+    align-items: stretch;
+    border: 1px solid var(--pg-edge);
+    border-bottom: none;
+    border-radius: 12px 12px 0 0;
+    overflow: hidden;
+    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.32);
+}
+
+/* Near-black rather than a translucent green, so the code stops competing
+   with the hero it sits on. */
+.codePane {
+    flex: 0 0 46%;
+    min-width: 0;
+    background: rgba(0, 0, 0, 0.72);
+}
+
+.sheetPane {
+    display: flex;
+    flex: 1 1 auto;
+    flex-direction: column;
+    min-width: 0;
+    background: #ffffff;
+}
+
+.paneLabel {
+    padding: 9px 14px;
+    font-size: 0.75rem;
+    letter-spacing: 0.02em;
+}
+
+.codePane .paneLabel {
+    color: rgba(255, 255, 255, 0.6);
+    border-bottom: 1px solid rgba(255, 255, 255, 0.14);
+}
+
+.sheetPane .paneLabel {
+    color: var(--pg-ink-muted);
+    border-bottom: 1px solid var(--pg-rule);
+}
+
+/* Code pane ------------------------------------------------------------- */
+
+.code {
+    margin: 0;
+    padding: 14px 16px 18px;
+    background: none;
+    border-radius: 0;
+    font-size: 0.875rem;
+    line-height: 1.7;
+    color: rgba(255, 255, 255, 0.92);
+    white-space: pre;
+    overflow-x: auto;
+}
+
+.field {
+    display: block;
+    margin-top: 0.5em;
+    padding-left: 2.2ch;
+    border-radius: 4px;
+    transition: background-color 120ms ease;
+}
+
+.fieldActive {
+    background: rgba(20, 130, 75, 0.34);
+}
+
+.annotationLine,
+.declaration {
+    display: block;
+}
+
+.annotation {
+    color: #ffffff;
+}
+
+.punctuation {
+    color: rgba(255, 255, 255, 0.58);
+}
+
+.declaration {
+    color: rgba(255, 255, 255, 0.72);
+}
+
+/*
+ * The header string carries the brand tint that its column header carries in
+ * the sheet, so the eye pairs the two without anything needing to be clicked.
+ * The negative margin cancels the padding, so the tint bleeds past the glyphs
+ * without pushing the quotes out and implying spaces inside the string.
+ */
+.headerLiteral {
+    padding: 0 2px;
+    margin: 0 -2px;
+    color: #ffffff;
+    background: var(--pg-brand-tint);
+    border-radius: 2px;
+    transition: background-color 120ms ease;
+}
+
+.fieldActive .headerLiteral {
+    background: var(--pg-brand);
+}
+
+/* Sheet pane ------------------------------------------------------------ */
+
+.sheetScroll {
+    overflow-x: auto;
+}
+
+/* Infima sets `table { display: block }` for scrolling; .sheetScroll does that
+   job here, and the cells need real table layout to fill the pane. */
+.sheet {
+    display: table;
+    width: 100%;
+    margin: 0;
+    font-size: 0.875rem;
+    color: var(--pg-ink);
+    border-collapse: collapse;
+    table-layout: auto;
+}
+
+.sheet td,
+.sheet th {
+    border: 1px solid var(--pg-rule);
+}
+
+.corner,
+.columnLetter,
+.rowNumber {
+    padding: 4px 6px;
+    font-size: 0.6875rem;
+    font-weight: 400;
+    color: var(--pg-ink-muted);
+    text-align: center;
+    background: var(--pg-gutter);
+}
+
+.rowNumber {
+    width: 2rem;
+}
+
+.columnLetter {
+    transition: background-color 120ms ease, color 120ms ease;
+}
+
+.columnLetterActive {
+    color: #ffffff;
+    background: var(--pg-brand);
+}
+
+.headerCell {
+    padding: 10px 12px;
+    font-weight: 600;
+    white-space: nowrap;
+    background: var(--pg-brand-wash);
+    border-bottom: 2px solid var(--pg-brand);
+}
+
+.cell {
+    padding: 9px 12px;
+    white-space: nowrap;
+    transition: background-color 120ms ease;
+}
+
+.cellActive {
+    background: var(--pg-brand-wash-strong);
+}
+
+.sheetTab {
+    margin-top: auto;
+    padding: 9px 14px;
+    font-size: 0.75rem;
+    color: var(--pg-brand);
+    border-top: 1px solid var(--pg-rule);
+}
+
+.sheetTab::before {
+    content: '';
+    display: inline-block;
+    width: 7px;
+    height: 7px;
+    margin-right: 7px;
+    vertical-align: baseline;
+    background: var(--pg-brand);
+    border-radius: 1px;
+}
+
+/* Status bar and hint --------------------------------------------------- */
+
+.statusBar {
+    padding: 11px 16px;
+    font-size: 0.8125rem;
+    color: rgba(255, 255, 255, 0.82);
+    background: rgba(0, 0, 0, 0.8);
+    border: 1px solid var(--pg-edge);
+    border-radius: 0 0 12px 12px;
+    overflow-x: auto;
+}
+
+.statusBar code {
+    padding: 0;
+    color: inherit;
+    white-space: pre;
+    background: none;
+    border: none;
+}
+
+.hint {
+    margin: 0.9rem 0 0;
+    font-size: 0.9375rem;
+    color: rgba(255, 255, 255, 0.82);
+}
+
+.srOnly {
+    position: absolute;
+    width: 1px;
+    height: 1px;
+    padding: 0;
+    margin: -1px;
+    overflow: hidden;
+    clip: rect(0, 0, 0, 0);
+    white-space: nowrap;
+    border: 0;
+}
+
+@media screen and (max-width: 996px) {
+    .playground {
+        max-width: 640px;
+        margin: 0 auto;
+    }
+
+    .panes {
+        flex-direction: column;
+    }
+
+    .codePane {
+        flex: 1 1 auto;
+    }
+}
+
+@media (prefers-reduced-motion: reduce) {
+    .field,
+    .columnLetter,
+    .cell,
+    .headerLiteral {
+        transition: none;
+    }
+}
diff --git a/website/src/pages/index.js b/website/src/pages/index.js
index b96663189..4eb86063e 100644
--- a/website/src/pages/index.js
+++ b/website/src/pages/index.js
@@ -22,6 +22,7 @@ import Link from '@docusaurus/Link';
 import useDocusaurusContext from '@docusaurus/useDocusaurusContext';
 import Layout from '@theme/Layout';
 import HomepageFeatures from '@site/src/components/HomepageFeatures';
+import HeroPlayground from '@site/src/components/HeroPlayground';
 import Translate from '@docusaurus/Translate';
 
 import Heading from '@theme/Heading';
@@ -62,29 +63,34 @@ function HomepageHeader() {
                 ))}
             </div>
             <div className={clsx('container', styles.heroContent)}>
-                <Heading as="h1" className="hero__title">
-                    {siteConfig.title}
-                </Heading>
-                <p className="hero__subtitle">
-                    <Translate>site.description</Translate>
-                </p>
-                <div className={styles.buttons}>
-                    <Link
-                        className={clsx("button button--secondary button--lg", styles.buttonWidth)}
-                        to="/docs/quickstart/guide">
-                        <Translate>quickstart</Translate>
-                    </Link>
+                <div className={styles.heroCopy}>
+                    <Heading as="h1" className="hero__title">
+                        {siteConfig.title}
+                    </Heading>
+                    <p className="hero__subtitle">
+                        <Translate>site.description</Translate>
+                    </p>
+                    <div className={styles.buttons}>
+                        <Link
+                            className={clsx("button button--secondary button--lg", styles.buttonWidth)}
+                            to="/docs/quickstart/guide">
+                            <Translate>quickstart</Translate>
+                        </Link>
 
-                    <Link
-                        className={clsx("button button--secondary button--lg", styles.buttonWidth, styles.buttonWithIcon)}
-                        to="https://github.com/apache/fesod">
-                        <img
-                            src="img/github_icon.svg"
-                            alt="GitHub"
-                            className={styles.buttonIcon}
-                        />
-                        <Translate>github</Translate>
-                    </Link>
+                        <Link
+                            className={clsx("button button--secondary button--lg", styles.buttonWidth, styles.buttonWithIcon)}
+                            to="https://github.com/apache/fesod">
+                            <img
+                                src="img/github_icon.svg"
+                                alt="GitHub"
+                                className={styles.buttonIcon}
+                            />
+                            <Translate>github</Translate>
+                        </Link>
+                    </div>
+                </div>
+                <div className={styles.heroDemo}>
+                    <HeroPlayground/>
                 </div>
             </div>
         </header>
diff --git a/website/src/pages/index.module.css b/website/src/pages/index.module.css
index 7f38c8ccb..d51776de2 100644
--- a/website/src/pages/index.module.css
+++ b/website/src/pages/index.module.css
@@ -113,6 +113,37 @@
     z-index: 2;
 }
 
+.heroDemo {
+    margin-top: 2.5rem;
+}
+
+@media screen and (min-width: 997px) {
+    .heroBanner {
+        padding: 4.5rem 0;
+    }
+
+    /* The demo is the densest thing on the page, so the hero opts out of the
+       1140px content width the rest of the page uses and gives it room. */
+    .heroContent {
+        --ifm-container-width: 1280px;
+        --ifm-container-width-xl: 1280px;
+
+        display: grid;
+        grid-template-columns: minmax(0, 4.5fr) minmax(0, 7.5fr);
+        gap: 3rem;
+        align-items: center;
+        text-align: left;
+    }
+
+    .heroCopy .buttons {
+        justify-content: flex-start;
+    }
+
+    .heroDemo {
+        margin-top: 0;
+    }
+}
+
 @media screen and (max-width: 996px) {
     .colLabels,
     .rowLabels {