:root {
  color-scheme: dark;
  --canvas: #090e15;
  --surface: #101722;
  --surface-raised: #16202e;
  --surface-soft: #0c121a;
  --text-white: #ffffff;
  --text-body: rgba(255, 255, 255, 0.7);
  --text-muted: rgba(255, 255, 255, 0.5);
  --text-unselected: rgba(255, 255, 255, 0.6);
  --border: #1e2a39;
  --border-strong: #2c3c50;
  --border-glass: rgba(255, 255, 255, 0.15);
  --accent: #3685f5;
  --accent-hover: #4b93fb;
  --accent-text: #5ea2ff;
  --on-accent: #ffffff;
  --warning: #e6c27a;
  --max-width: 1200px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --header-height: 72px;
  --z-header: 50;
  --z-toast: 100;
  --sidebar-width: 300px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  background-color: var(--canvas);
  color: var(--text-body);
  font-family: "Segoe UI Variable", "Segoe UI", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
a {
  touch-action: manipulation;
}

button,
input,
textarea,
select {
  font: inherit;
}

[hidden] {
  display: none !important;
}

:focus-visible {
  outline: 2px solid var(--accent-text);
  outline-offset: 3px;
}

::selection {
  background: var(--accent);
  color: var(--on-accent);
}

/* 強調字：背景使用軟體深色調面板色，文字用主色藍 */
code,
.highlight-text,
.badge {
  padding: 0.15em 0.45em;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  background-color: var(--surface-raised);
  color: var(--accent-text);
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 0.88em;
  font-weight: 600;
}

/* max-width: 1200px，內容水平居中 */
.container {
  width: min(calc(100% - 48px), var(--max-width));
  margin-inline: auto;
}

/* ==========================================================================
   Typography Rules
   H1: 64px / Bold / 行高 1.1 / 純白
   H2: 36px / Semibold
   Body: 16px或18px、行高 1.7、顏色rgba(255, 255, 255, 0.7)
   ========================================================================== */

h1,
.hero h1,
.download-heading h1 {
  margin: 0;
  color: var(--text-white);
  font-size: 64px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  text-wrap: balance;
}

h2,
.section-intro h2,
.boundary-grid h2,
.cta-row h2,
.tab-content h2,
.experimental-copy h2,
.after-install-copy h2 {
  margin: 0;
  color: var(--text-white);
  font-size: 36px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

p,
.body-text {
  color: var(--text-body);
  font-size: 16px;
  line-height: 1.7;
}

.hero-lead {
  max-width: 680px;
  margin: 20px 0 0;
  color: var(--text-body);
  font-size: 18px;
  line-height: 1.7;
}

/* ==========================================================================
   Buttons (軟體內按鈕樣式、無漸層、純色)
   Primary: 軟體藍色背景、白色文字、無漸層
   Secondary: 透明背景、軟體藍色邊框、藍色文字
   ========================================================================== */

.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  transition: background-color 150ms ease, border-color 150ms ease, color 150ms ease;
}

.button-primary {
  border: 1px solid var(--accent);
  background-color: var(--accent);
  color: var(--text-white);
}

.button-primary:hover {
  border-color: var(--accent-hover);
  background-color: var(--accent-hover);
  color: var(--text-white);
}

.button-secondary {
  border: 1px solid var(--accent);
  background-color: transparent;
  color: var(--accent-text);
}

.button-secondary:hover {
  background-color: var(--surface-raised);
  border-color: var(--accent-hover);
  color: var(--text-white);
}

.button-small {
  min-height: 36px;
  padding: 6px 14px;
  font-size: 14px;
}

.button-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

/* ==========================================================================
   Header Navigation
   ========================================================================== */

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 12px;
  left: 12px;
  padding: 8px 14px;
  transform: translateY(-160%);
  border-radius: var(--radius-sm);
  background: var(--text-white);
  color: var(--canvas);
  font-weight: 700;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  z-index: var(--z-header);
  top: 0;
  border-bottom: 1px solid var(--border);
  background-color: var(--canvas);
}

.nav-shell {
  display: flex;
  min-height: var(--header-height);
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 10px;
  color: var(--text-white);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand img {
  width: 32px;
  height: 32px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  position: relative;
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  padding: 6px 14px;
  color: var(--text-unselected);
  font-size: 15px;
  font-weight: 600;
  transition: color 150ms ease;
}

.nav-link:hover,
.nav-link.is-current {
  color: var(--text-white);
}

.nav-link.is-current::after {
  position: absolute;
  right: 14px;
  bottom: 2px;
  left: 14px;
  height: 2px;
  background-color: var(--accent);
  content: "";
}

/* ==========================================================================
   Eyebrow & Meta Labels
   ========================================================================== */

.eyebrow,
.step-index,
.release-kicker,
.star-prompt-kicker {
  display: inline-flex;
  align-items: center;
  margin: 0 0 16px;
  color: var(--accent-text);
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 8px;
  border-radius: 50%;
  background-color: var(--accent);
}

/* ==========================================================================
   Hero Section
   Section 垂直間距統一為 120px~160px (使用 140px)
   12 欄網格，圖片 7 欄，文字 5 欄 (圖片放大並靠右)
   ========================================================================== */

.hero {
  padding: 140px 0;
  border-bottom: 1px solid var(--border);
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  align-items: center;
  gap: 40px;
}

.hero-copy {
  grid-column: span 5;
}

.hero-copy .button-row {
  margin-top: 32px;
}

.meta-line {
  margin: 24px 0 0;
  color: var(--text-muted);
  font-size: 14px;
}

.hero-visual {
  grid-column: span 7;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: center;
  gap: 16px;
}

.hero-visual-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
  margin-left: auto;
}

.hero-visual-icon img {
  width: 320px;
  height: 320px;
  max-width: 100%;
  filter: drop-shadow(0 20px 36px rgba(0, 0, 0, 0.45));
}

/* ==========================================================================
   Section 統一排版規則 (垂直間距統一為 120px~160px)
   ========================================================================== */

.section {
  padding: 140px 0;
}

.section-rule {
  border-top: 1px solid var(--border);
}

.section-contrast {
  border-block: 1px solid var(--border);
  background-color: var(--surface-soft);
}

.section-intro {
  max-width: 800px;
  margin-bottom: 56px;
}

.split-heading {
  display: grid;
  max-width: none;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  align-items: end;
  gap: 48px;
}

.split-heading > p {
  margin: 0;
  color: var(--text-body);
  font-size: 17px;
}

/* ==========================================================================
   側邊分頁導覽系統 (Sidebar Tab Navigation)
   Sidebar: 寬度固定約 300px，設為 sticky
   選取狀態使用軟體主色藍做為標示，非選取狀態維持半透明白
   內容切換 Fade-in，維持 800px 內的易讀行寬
   ========================================================================== */

.tab-layout {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

.tab-sidebar {
  position: sticky;
  top: calc(var(--header-height) + 24px);
  width: var(--sidebar-width);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background-color: var(--surface);
  padding: 12px;
}

.sidebar-header {
  padding: 12px 14px 10px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 8px;
}

.sidebar-header .eyebrow {
  margin: 0;
}

.tab-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.tab-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 12px 16px;
  border: 1px solid transparent;
  border-left: 3px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-unselected);
  font-size: 14.5px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  transition: all 150ms ease;
}

.tab-btn:hover {
  background-color: var(--surface-raised);
  color: var(--text-white);
}

/* 選取狀態使用軟體主色藍做為標示 */
.tab-btn.is-active,
.tab-btn[aria-selected="true"] {
  border-left-color: var(--accent);
  background-color: var(--surface-raised);
  color: var(--text-white);
  font-weight: 700;
}

.tab-btn .tab-badge {
  color: var(--text-muted);
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 11px;
}

.tab-btn.is-active .tab-badge,
.tab-btn[aria-selected="true"] .tab-badge {
  color: var(--accent-text);
}

/* 內容切換 Fade-in，維持 800px 內的易讀行寬 */
.tab-panels {
  max-width: 800px;
  width: 100%;
}

.tab-panel {
  display: none;
}

.tab-panel.is-active {
  display: block;
  animation: tabFadeIn 220ms ease forwards;
}

@keyframes tabFadeIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.tab-content {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.tab-content-lead {
  color: var(--text-body);
  font-size: 17px;
  margin: 0;
}

/* 圖片統一加上 1px solid rgba(255, 255, 255, 0.15) */
.shot-frame {
  margin: 16px 0 0;
  overflow: hidden;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  background-color: var(--surface);
}

.shot-frame img {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--border-glass);
}

.shot-wide {
  padding: 20px;
  background-color: var(--surface-soft);
}

.shot-disk {
  padding: 16px;
  background-color: var(--surface-soft);
}

.operation-list {
  display: grid;
  margin: 16px 0 0;
  padding: 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  list-style: none;
}

.operation-list li {
  padding: 10px 14px;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  background-color: var(--surface-raised);
  color: var(--text-white);
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 13.5px;
}

.operation-list li::before {
  content: "• ";
  color: var(--accent-text);
}

/* 四大原則 Bento Grid (純色、無漸層) */
.principle-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.principle-grid article {
  padding: 24px;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  background-color: var(--surface);
}

.principle-grid article > span {
  display: inline-block;
  margin-bottom: 12px;
  color: var(--accent-text);
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 12px;
  font-weight: 700;
}

.principle-grid h3 {
  margin: 0 0 8px;
  color: var(--text-white);
  font-size: 18px;
  font-weight: 600;
}

.principle-grid p {
  margin: 0;
  color: var(--text-body);
  font-size: 14.5px;
}

.text-link {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  color: var(--accent-text);
  font-weight: 600;
}

.text-link:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.inline-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  margin-top: 24px;
}

.inline-links a {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  color: var(--accent-text);
  font-weight: 600;
}

.inline-links a:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ==========================================================================
   Final CTA
   ========================================================================== */

.final-cta {
  padding: 140px 0;
  border-top: 1px solid var(--border);
}

.cta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  padding: 48px;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  background-color: var(--surface);
}

.cta-row h2 {
  font-size: 36px;
}

/* ==========================================================================
   Site Footer
   ========================================================================== */

.site-footer {
  padding: 56px 0 40px;
  border-top: 1px solid var(--border);
  background-color: var(--canvas);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: start;
  gap: 24px 48px;
}

.footer-brand {
  min-height: 40px;
}

.footer-grid p {
  margin: 10px 0 0;
  color: var(--text-muted);
  font-size: 13.5px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
}

.footer-links a {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  color: var(--text-unselected);
  font-size: 14px;
}

.footer-links a:hover {
  color: var(--text-white);
}

.footer-meta {
  grid-column: 1 / -1;
  padding-top: 24px;
  margin-top: 24px;
  border-top: 1px solid var(--border);
}

/* ==========================================================================
   Download Page Layout & Panels (純色無漸層)
   ========================================================================== */

.download-hero {
  padding: 140px 0;
}

.download-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  align-items: end;
  gap: 48px;
  margin-bottom: 48px;
}

.download-heading > p:last-child {
  margin: 0;
  color: var(--text-body);
  font-size: 17px;
}

.release-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  background-color: var(--surface);
  overflow: hidden;
}

.release-primary,
.release-details {
  padding: 48px;
}

.release-details {
  border-left: 1px solid var(--border);
  background-color: var(--surface-soft);
}

.release-title-row {
  display: flex;
  align-items: center;
  gap: 20px;
}

.release-title-row img {
  width: 68px;
  height: 68px;
}

.release-title-row h2 {
  margin: 0;
  font-size: 32px;
}

.release-version {
  margin: 6px 0 0;
  color: var(--text-body);
  font-size: 15px;
}

.installer-button {
  width: 100%;
  min-height: 50px;
  margin-top: 32px;
  font-size: 16px;
}

.installer-meta {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin: 14px 0 0;
  color: var(--text-muted);
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 12px;
}

.loading-text {
  margin: 20px 0 0;
  color: var(--text-muted);
  font-size: 13px;
}

.download-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 32px;
}

.stat {
  padding: 16px 20px;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  background-color: var(--surface-raised);
}

.stat strong {
  display: block;
  color: var(--text-white);
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 24px;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  line-height: 1.1;
}

.stat span {
  display: block;
  margin-top: 6px;
  color: var(--text-body);
  font-size: 12.5px;
}

.release-includes h3 {
  margin: 0 0 14px;
  color: var(--text-white);
  font-size: 17px;
  font-weight: 600;
}

.release-includes ul {
  margin: 0;
  padding-left: 20px;
  color: var(--text-body);
  font-size: 15px;
}

.release-includes li + li {
  margin-top: 8px;
}

.notice-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.notice-grid article {
  padding: 28px 24px;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  background-color: var(--surface);
}

.notice-grid article > span {
  display: inline-block;
  margin-bottom: 16px;
  color: var(--accent-text);
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 12px;
  font-weight: 700;
}

.notice-grid h3 {
  margin: 0 0 10px;
  color: var(--text-white);
  font-size: 19px;
  font-weight: 600;
}

.notice-grid p {
  margin: 0;
  color: var(--text-body);
  font-size: 14.5px;
}

.after-install-grid {
  display: grid;
  grid-template-columns: minmax(280px, 0.85fr) minmax(0, 1.15fr);
  align-items: center;
  gap: 48px;
}

.steps {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: steps;
}

.steps li {
  position: relative;
  min-height: 44px;
  padding: 6px 0 10px 48px;
  color: var(--text-white);
  font-size: 15.5px;
  counter-increment: steps;
}

.steps li::before {
  position: absolute;
  top: 4px;
  left: 0;
  display: grid;
  width: 32px;
  height: 32px;
  border: 1px solid var(--border-glass);
  border-radius: 50%;
  background-color: var(--surface-raised);
  color: var(--accent-text);
  content: counter(steps, decimal-leading-zero);
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 11px;
  font-weight: 700;
  place-items: center;
}

.boundary-section {
  border-top: 1px solid var(--border);
}

.boundary-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  align-items: start;
  gap: 48px;
}

.compact-boundary {
  padding: 64px 0;
}

.compact-boundary .boundary-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 860px;
}

.compact-boundary .boundary-grid h2 {
  font-size: 24px;
  line-height: 1.25;
}

.compact-boundary .boundary-copy p {
  max-width: 760px;
  margin: 0 0 12px;
}

.boundary-copy p {
  margin: 0 0 16px;
  color: var(--text-body);
  font-size: 16px;
  line-height: 1.7;
}

.resource-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 48px;
}

.resource-columns h3 {
  margin: 0 0 16px;
  color: var(--text-white);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.resource-list {
  display: flex;
  flex-direction: column;
}

.resource-list > a {
  display: flex;
  min-height: 64px;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
  border: 0;
  border-bottom: 1px solid var(--border);
  border-radius: 0;
  background-color: transparent;
  transition: border-color 150ms ease, opacity 150ms ease;
}

.resource-list > a:hover {
  border-bottom-color: var(--accent);
}

.resource-list > a:hover strong {
  color: var(--accent-text);
}

.resource-list > a[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: 0.5;
}

.resource-list strong {
  display: block;
  color: var(--text-white);
  font-size: 15px;
  font-weight: 600;
  transition: color 150ms ease;
}

.resource-list small {
  display: block;
  margin-top: 4px;
  color: var(--text-muted);
  font-size: 13px;
}

.resource-list [aria-hidden="true"] {
  color: var(--text-muted);
  font-size: 18px;
  transition: color 150ms ease, transform 150ms ease;
}

.resource-list > a:hover [aria-hidden="true"] {
  color: var(--accent-text);
}

/* ==========================================================================
   Star Prompt
   ========================================================================== */

.star-prompt {
  position: fixed;
  z-index: var(--z-toast);
  right: 24px;
  bottom: 24px;
  width: min(calc(100% - 48px), 360px);
  padding: 24px;
  transform: translateY(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  background-color: var(--surface-raised);
  opacity: 0;
  transition: opacity 220ms ease, transform 220ms ease;
}

.star-prompt.is-visible {
  transform: translateY(0);
  opacity: 1;
}

.star-prompt-close {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 36px;
  height: 36px;
  border: 0;
  border-radius: var(--radius-sm);
  cursor: pointer;
  background: transparent;
  color: var(--text-muted);
  font-size: 22px;
}

.star-prompt-close:hover {
  background-color: var(--surface);
  color: var(--text-white);
}

.star-prompt h2 {
  margin: 0;
  font-size: 20px;
}

.star-prompt > p:not(.star-prompt-kicker) {
  margin: 8px 0 0;
  color: var(--text-body);
  font-size: 14px;
}

.star-prompt-links {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 16px;
}

.star-prompt-links a {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  font-weight: 600;
}

.star-prompt-links a:first-child {
  border: 1px solid var(--border-glass);
  background-color: var(--surface);
  color: var(--text-body);
}

.star-prompt-links .star-prompt-star {
  background-color: var(--accent);
  color: var(--text-white);
}

/* ==========================================================================
   404 Page
   ========================================================================== */

.not-found {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
  text-align: center;
}

.not-found > div {
  max-width: 580px;
  padding: 48px;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  background-color: var(--surface);
}

.not-found img {
  width: 80px;
  margin: 0 auto 24px;
}

.not-found h1 {
  font-size: 48px;
  margin: 0;
}

.not-found > div > p:not(.eyebrow) {
  margin: 16px 0 32px;
  color: var(--text-body);
}

/* ==========================================================================
   Responsive Adaptations
   ========================================================================== */

@media (max-width: 1024px) {
  .hero {
    padding: 100px 0;
  }

  .section {
    padding: 100px 0;
  }

  .final-cta,
  .download-hero {
    padding: 100px 0;
  }

  h1,
  .hero h1,
  .download-heading h1 {
    font-size: 48px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-copy,
  .hero-visual {
    grid-column: span 1;
  }

  .hero-visual {
    align-items: center;
  }

  .hero-visual-icon {
    margin-left: 0;
  }

  .tab-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .tab-sidebar {
    position: static;
    width: 100%;
  }

  .tab-nav {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 6px;
  }

  .tab-panels {
    max-width: 100%;
  }

  .release-panel {
    grid-template-columns: 1fr;
  }

  .release-details {
    border-left: 0;
    border-top: 1px solid var(--border);
  }
}

@media (max-width: 768px) {
  .hero,
  .section,
  .final-cta,
  .download-hero {
    padding: 80px 0;
  }

  .compact-boundary {
    padding: 48px 0;
  }

  h1,
  .hero h1,
  .download-heading h1 {
    font-size: 38px;
  }

  h2,
  .section-intro h2,
  .boundary-grid h2,
  .cta-row h2,
  .tab-content h2,
  .experimental-copy h2,
  .after-install-copy h2 {
    font-size: 28px;
  }

  .split-heading,
  .download-heading,
  .mount-grid,
  .boundary-grid,
  .after-install-grid,
  .resource-columns {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .notice-grid,
  .principle-grid {
    grid-template-columns: 1fr;
  }

  .cta-row {
    flex-direction: column;
    align-items: flex-start;
    padding: 32px;
  }

  .nav-github {
    display: none;
  }
}

@media (max-width: 520px) {
  .container {
    width: min(calc(100% - 32px), var(--max-width));
  }

  .button-row {
    flex-direction: column;
    align-items: stretch;
  }

  .button-row .button {
    width: 100%;
  }

  .operation-list,
  .download-stats {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-meta {
    grid-column: 1;
  }

  .star-prompt {
    right: 16px;
    bottom: 16px;
    width: calc(100% - 32px);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}