:root {
  --bg: #fafafc;
  --ink: #1f2937;
  --muted: #4b5563;
  --line: #dfe1e8;
  --card: #f1f0f8;
  --accent: #6254d4;
  --accent-hover: #5146b5;
  --page: 1160px;
  --measure: 68ch;
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Rounded", "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 17px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--bg);
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 110px; }
body { margin: 0; min-block-size: 100vh; }
img, svg { display: block; max-inline-size: 100%; }
img { block-size: auto; }
a { color: var(--accent); text-underline-offset: .22em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
main:focus { outline: none; }
.skip { position: absolute; inset-inline-start: 16px; inset-block-start: 8px; z-index: 5; transform: translateY(-160%); background: var(--ink); color: var(--bg); padding: 10px 16px; text-decoration: none; }
.skip:focus { transform: none; }
.wrap { inline-size: min(var(--page), calc(100% - 64px)); margin-inline: auto; }
.site-header { position: sticky; inset-block-start: 0; z-index: 4; background: var(--bg); border-block-end: 1px solid var(--line); }
.site-header .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 4px 24px; min-block-size: 80px; }
.brand { display: inline-flex; align-items: center; gap: 12px; min-block-size: 52px; font-weight: 700; font-size: 1.1rem; color: var(--ink); text-decoration: none; }
.brand img { inline-size: 40px; block-size: 40px; border-radius: 10px; }
.nav { display: flex; flex-wrap: wrap; gap: 2px; }
.nav a { display: inline-flex; align-items: center; min-block-size: 44px; padding-inline: 12px; color: var(--muted); text-decoration: none; }
.nav a[aria-current="page"] { color: var(--ink); text-decoration: underline; text-decoration-color: var(--accent); text-underline-offset: .35em; }
main { padding-block: 64px 88px; }
h1, h2, h3 { color: var(--ink); }
h1 { margin: 0; font-size: clamp(3.1rem, 6.8vw, 5.7rem); line-height: 1.12; letter-spacing: -.045em; }
h2 { margin: 0 0 16px; font-size: clamp(1.6rem, 3vw, 2.25rem); line-height: 1.35; letter-spacing: -.035em; }
h3 { font-size: 1.1rem; line-height: 1.5; }
p { margin-block: 16px; }
.cover { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, .7fr); align-items: center; gap: 72px; }
.cover-copy { padding-block: 20px; }
.release { margin-block: 0 22px; color: var(--muted); font-size: .95rem; }
.hero-line { margin-block: 26px 18px; font-size: clamp(1.5rem, 2.6vw, 2rem); font-weight: 600; line-height: 1.5; letter-spacing: -.02em; }
.lede { max-inline-size: 39rem; font-size: 1.12rem; line-height: 1.75; color: var(--muted); }
.note, .compatibility, figcaption { color: var(--muted); font-size: .94rem; }
.note { max-inline-size: 76ch; }
.compatibility { margin-block-start: 26px; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 24px; margin-block: 26px 16px; }
.actions a { display: inline-flex; align-items: center; min-block-size: 48px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 18px; min-block-size: 50px; padding: 10px 22px; border-radius: 10px; background: var(--accent); color: var(--bg); font-weight: 600; text-decoration: none; text-align: center; }
.button:hover { background: var(--accent-hover); text-decoration: none; }
figure { margin: 0; }
.app-preview { justify-self: center; inline-size: min(100%, 288px); }
.app-preview img { border: 1px solid var(--line); border-radius: 16px; }
figcaption { margin-block-start: 12px; font-size: .82rem; text-align: center; }
.mood-section { margin-block-start: 80px; padding-block: 36px; border-block: 1px solid var(--line); }
.mood-section h2 { font-size: 1.5rem; }
.mood-section p { color: var(--muted); }
.mood-strip { display: grid; grid-template-columns: repeat(10, minmax(0, 1fr)); padding: 0; margin: 32px 0 0; gap: 12px; list-style: none; }
.mood-strip li { display: grid; justify-items: center; gap: 10px; font-size: .88rem; color: var(--muted); }
.mood-strip img { inline-size: 70px; block-size: 70px; object-fit: contain; }
.band { margin-block-start: 96px; }
.section-intro { max-inline-size: 68ch; color: var(--muted); }
.feature-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: center; gap: 64px; margin-block-start: 36px; }
.facts { margin: 0; }
.facts > div { display: grid; grid-template-columns: 7rem minmax(0, 1fr); gap: 24px; padding-block: 24px; border-block-start: 1px solid var(--line); }
.facts dt { font-weight: 650; }
.facts dd { margin: 0; color: var(--muted); max-inline-size: 68ch; }
.feature-layout .facts > div { grid-template-columns: 1fr; gap: 8px; }
.screen-pair { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.screen-pair img { border: 1px solid var(--line); border-radius: 12px; }
.screen-pair figure:nth-child(2) { margin-block-start: 54px; }
.split { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 48px 72px; padding: 40px; background: var(--card); border-radius: 16px; }
.split p { color: var(--muted); }
.split a { display: inline-flex; align-items: center; min-block-size: 44px; }
.table-scroll { overflow-x: auto; margin-block: 28px 18px; }
table { inline-size: 100%; border-collapse: collapse; text-align: start; }
caption { text-align: start; margin-block-end: 12px; color: var(--muted); font-size: .94rem; }
th, td { border-block-end: 1px solid var(--line); padding: 18px 16px; text-align: start; }
thead { background: var(--card); }
tbody th { inline-size: 45%; font-weight: 500; }
td { inline-size: 27.5%; }
.product-facts { max-inline-size: 960px; }
.download-band { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px; margin-block-start: 80px; padding-block: 40px; border-block-start: 1px solid var(--line); }
.download-band h2 { margin: 0; }
.doc-title { max-inline-size: 900px; margin-block-end: 48px; }
.doc-title h1 { font-size: clamp(2.4rem, 5vw, 3.6rem); }
.meta { color: var(--muted); }
.doc { display: grid; grid-template-columns: 210px minmax(0, 1fr); gap: 56px; align-items: start; }
.toc { position: sticky; inset-block-start: 104px; max-block-size: calc(100vh - 128px); overflow-y: auto; padding: 4px; }
.toc ol { margin: 0; padding: 0; list-style: none; }
.toc a { display: flex; align-items: center; min-block-size: 44px; padding-block: 6px; color: var(--muted); text-decoration: none; font-size: .92rem; }
.toc a:hover { color: var(--accent); text-decoration: underline; }
.prose { min-inline-size: 0; max-inline-size: var(--measure); }
.prose h2 { margin-block: 48px 18px; font-size: 1.5rem; }
.prose > h2:first-child, .prose > section:first-child > h2:first-child { margin-block-start: 0; }
.prose h3 { margin-block: 24px 10px; }
.prose p, .prose li { color: var(--muted); overflow-wrap: anywhere; }
.prose ul { padding-inline-start: 1.3rem; }
.prose li + li { margin-block-start: 8px; }
.answer { padding-block: 14px; border-block-start: 1px solid var(--line); }
.answer h3 { margin-block: 0 10px; }
.answer p { margin-block: 0 8px; }
.mail { display: inline-flex; align-items: center; min-block-size: 44px; }
.policy-summary { padding: 24px; background: var(--card); border-radius: 12px; }
.policy-summary h2 { margin-block-start: 0; }
.site-footer { border-block-start: 1px solid var(--line); padding-block: 32px 44px; color: var(--muted); font-size: .88rem; }
.footer-top { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 24px; }
.footer-top strong { color: var(--ink); margin-inline-end: auto; font-size: 1.1rem; }
.site-footer a { display: inline-flex; align-items: center; min-block-size: 44px; overflow-wrap: anywhere; }
.site-footer p { margin-block: 2px; }
.site-footer span { margin-inline-start: 16px; }
@media (max-width: 900px) {
  .cover { gap: 32px; }
  .feature-layout { gap: 32px; }
  .split { padding: 28px; gap: 32px; }
  .doc { grid-template-columns: 1fr; gap: 28px; }
  .toc { position: static; max-block-size: none; overflow: visible; }
  .toc ol { display: flex; flex-wrap: wrap; gap: 0 24px; }
  .toc a { white-space: normal; }
  .mood-strip { grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 20px; }
}
@media (max-width: 650px) {
  .wrap { inline-size: calc(100% - 36px); }
  .site-header { position: static; }
  .site-header .wrap { padding-block: 10px; gap: 8px; }
  .nav { inline-size: 100%; justify-content: space-between; }
  .nav a { padding-inline: 6px; font-size: .88rem; }
  html { scroll-padding-top: 24px; }
  main { padding-block: 32px 56px; }
  .cover, .split, .feature-layout { grid-template-columns: 1fr; }
  .cover { gap: 28px; }
  .app-preview { inline-size: 244px; }
  .cover-copy { padding-block: 0; }
  .mood-section, .band { margin-block-start: 56px; }
  .mood-strip { gap: 18px 8px; }
  .mood-strip img { inline-size: 48px; block-size: 48px; }
  .mood-strip li { font-size: .76rem; }
  .split { padding: 24px; }
  .facts > div { grid-template-columns: 1fr; gap: 8px; }
  .screen-pair { max-inline-size: 420px; margin-inline: auto; }
  th, td { padding: 14px 8px; font-size: .88rem; }
  tbody th { inline-size: 40%; }
  .site-footer p { overflow-wrap: anywhere; }
  .site-footer p a { display: inline; }
  .site-footer span { display: block; margin-inline: 0; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
@media print {
  .site-header, .skip, .toc, .actions, .download-band { display: none; }
  .doc { display: block; }
  main { padding: 0; }
  .wrap { inline-size: 100%; }
  a { color: var(--ink); }
}