:root {
  color-scheme: light;
  --brand: #42cb77;
  --brand-hover: #35bd69;
  --brand-ink: #0d6f3c;
  --brand-on-color: #0d3f26;
  --brand-surface: #edf8f1;
  --ink: #202124;
  --muted: #606b78;
  --border: #dce3e1;
  --canvas: #f7faf8;
  --white: #fff;
  --radius: 11px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--canvas);
  color: var(--ink);
  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
}
* { box-sizing: border-box; }
body { margin: 0; }
a { color: inherit; text-decoration: none; }
button, a, summary { -webkit-tap-highlight-color: transparent; }
a:focus-visible, summary:focus-visible { outline: 3px solid var(--brand-ink); outline-offset: 5px; }
img { display: block; max-width: 100%; }
p, h1, h2, h3 { margin: 0; }
section, aside { scroll-margin-top: 24px; }
.container { width: min(1200px, calc(100% - 96px)); margin-inline: auto; }
.skip-link { position: absolute; top: -100px; left: 16px; padding: 16px; background: var(--white); z-index: 10; }
.skip-link:focus { top: 16px; }
.header { min-height: 112px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--border); gap: 24px; }
.brand { display: inline-flex; gap: 12px; align-items: center; min-height: 48px; font-size: 23px; font-weight: 650; letter-spacing: .06em; }
.brand img { border-radius: 7px; }
.header nav { display: flex; gap: 24px; align-items: center; font-size: 14px; }
.header nav a { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; }
.header nav a:hover { color: var(--brand-ink); }
.header .nav-download { padding: 0 20px; border: 1px solid var(--border); border-radius: 7px; }
.hero { display: grid; grid-template-columns: minmax(0, 1fr) 370px; gap: clamp(48px, 6vw, 100px); align-items: center; padding-block: 92px 100px; }
.eyebrow { font-size: 12px; font-weight: 650; letter-spacing: .17em; color: var(--muted); line-height: 1.8; }
.hero-copy .eyebrow { color: var(--brand-ink); margin-bottom: 27px; }
h1 { font-size: clamp(40px, 4.6vw, 64px); font-weight: 650; letter-spacing: -.045em; line-height: 1.36; }
h1 span { color: var(--brand-ink); }
.hero-description { max-width: 490px; margin-top: 28px; font-size: 17px; line-height: 1.95; color: var(--muted); }
.hero-actions { display: flex; gap: 12px; margin-top: 36px; flex-wrap: wrap; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 52px; padding: 14px 25px; border: 1px solid transparent; border-radius: 7px; font-size: 14px; font-weight: 600; line-height: 1.5; }
.primary { background: var(--brand); color: var(--brand-on-color); }
.primary:hover { background: var(--brand-hover); }
.secondary { border-color: var(--border); background: transparent; }
.secondary:hover { background: var(--white); border-color: var(--muted); }
.caption { font-size: 12px; color: var(--muted); margin-top: 18px; line-height: 1.8; }
.download-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 30px; }
.card-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 26px; }
.app-icon { border-radius: var(--radius); }
.release-tag { font-size: 10px; letter-spacing: .15em; font-weight: 650; color: var(--brand-ink); background: var(--brand-surface); border-radius: 7px; padding: 8px 10px; }
.card-label { font-size: 10px; letter-spacing: .16em; }
.download-card h2 { font-size: 28px; font-weight: 650; letter-spacing: -.03em; margin-top: 6px; }
.card-description { font-size: 14px; color: var(--muted); margin-top: 8px; }
.package-meta { padding-block: 20px; margin-block: 26px 22px; border-block: 1px solid var(--border); display: grid; gap: 16px; }
.package-meta div { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; font-size: 12px; }
.package-meta dt { color: var(--muted); }
.package-meta dd { margin: 0; text-align: right; }
.build-number { color: var(--muted); font-size: 10px; }
.card-download { width: 100%; }
.download-tip { color: var(--muted); font-size: 11px; margin-top: 12px; text-align: center; }
summary { cursor: pointer; min-height: 48px; align-content: center; line-height: 1.6; }
.section { padding-block: 76px; border-top: 1px solid var(--border); }
.section-heading { display: flex; justify-content: space-between; align-items: flex-end; gap: 32px; margin-bottom: 44px; }
.section-heading h2 { font-size: clamp(28px, 3vw, 38px); line-height: 1.45; letter-spacing: -.035em; font-weight: 600; margin-top: 12px; }
.section-heading > p { font-size: 14px; color: var(--muted); line-height: 1.9; max-width: 370px; }
.feature-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 32px; }
.feature { padding-top: 21px; border-top: 1px solid var(--border); }
.feature-number { font-size: 12px; color: var(--brand-ink); font-variant-numeric: tabular-nums; }
.feature h3 { font-size: 20px; font-weight: 600; margin-top: 20px; }
.feature p { color: var(--muted); font-size: 14px; line-height: 1.9; margin-top: 12px; }
.feature-note { display: block; margin-top: 24px; font-size: 11px; color: var(--muted); }
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 36px; list-style: none; margin: 0; padding: 0; }
.steps li { display: flex; gap: 16px; align-items: flex-start; }
.step-number { display: grid; place-items: center; flex: 0 0 36px; height: 36px; border: 1px solid var(--border); border-radius: 7px; color: var(--brand-ink); font-size: 14px; }
.steps h3 { font-size: 17px; line-height: 36px; font-weight: 600; }
.steps p { margin-top: 8px; color: var(--muted); font-size: 13px; line-height: 1.9; }
.questions { margin-top: 48px; border-top: 1px solid var(--border); }
.questions details { border-bottom: 1px solid var(--border); }
.questions summary { font-size: 14px; padding-block: 16px; min-height: 60px; }
.questions p { max-width: 820px; font-size: 13px; line-height: 1.9; color: var(--muted); padding-bottom: 20px; }
.closing { display: flex; justify-content: space-between; align-items: center; gap: 32px; padding: 52px 48px; background: var(--brand-surface); border-radius: var(--radius); margin-bottom: 72px; }
.closing .eyebrow { color: var(--brand-ink); }
.closing h2 { font-size: clamp(26px, 3vw, 36px); line-height: 1.5; font-weight: 600; margin-top: 10px; letter-spacing: -.035em; }
.closing .button { flex-shrink: 0; }
.footer { border-top: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; gap: 16px; min-height: 96px; color: var(--muted); font-size: 12px; line-height: 1.8; }
.footer .icp-link { display: inline-flex; align-items: center; min-height: 48px; flex-shrink: 0; }
.footer .icp-link:hover { color: var(--brand-ink); }
@media (max-width: 1000px) {
  .container { width: calc(100% - 64px); }
  .hero { grid-template-columns: minmax(0, 1fr) 330px; gap: 32px; padding-block: 64px; }
  h1 { font-size: 42px; }
  .download-card { padding: 25px; }
  .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px; }
  .steps { gap: 24px; }
}
@media (max-width: 720px) {
  .container { width: calc(100% - 40px); }
  .header { min-height: 86px; gap: 12px; }
  .brand { font-size: 19px; gap: 8px; }
  .brand img { width: 30px; height: 30px; }
  .header nav { gap: 12px; font-size: 12px; }
  .header nav a[href="#guide"] { display: none; }
  .header .nav-download { padding-inline: 12px; }
  .hero { grid-template-columns: minmax(0, 1fr); gap: 40px; padding-block: 48px 56px; }
  h1 { font-size: clamp(36px, 8vw, 50px); }
  .hero-description { font-size: 15px; margin-top: 22px; }
  .hero-actions { margin-top: 26px; }
  .hero-actions .button { flex: 1; padding-inline: 12px; }
  .download-card { width: 100%; }
  .section { padding-block: 48px; }
  .section-heading { display: block; margin-bottom: 32px; }
  .section-heading > p { margin-top: 20px; font-size: 13px; }
  .feature-grid { gap: 28px 22px; }
  .feature h3 { font-size: 18px; margin-top: 16px; }
  .feature p { font-size: 13px; }
  .steps { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .closing { padding: 32px 24px; display: block; margin-bottom: 40px; }
  .closing .button { margin-top: 24px; }
  .footer { align-items: flex-start; flex-direction: column; justify-content: center; gap: 10px; }
}
@media (max-width: 360px) {
  .header nav a[href="#features"] { display: none; }
  .feature-grid { grid-template-columns: minmax(0, 1fr); }
}