:root { color-scheme: light; font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif; color: #24332d; background: #f7f6f2; font-synthesis: none; }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { margin: 0; line-height: 1.7; }
[hidden] { display: none !important; }
a { color: inherit; text-underline-offset: 4px; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid #b17638; outline-offset: 5px; }
button { font: inherit; }
.wrap { width: min(100% - 80px, 1264px); margin-inline: auto; }
.skip-link { position: absolute; top: -80px; left: 24px; z-index: 10; background: #fff; padding: 12px 20px; }
.skip-link:focus { top: 12px; }
.site-header { min-height: 92px; border-bottom: 1px solid #dee2d8; display: flex; justify-content: space-between; align-items: center; gap: 20px; }
.brand { font-size: 28px; font-weight: 750; color: #143f35; text-decoration: none; white-space: nowrap; }
.brand span { font-size: 14px; font-weight: 400; color: #68746d; margin-left: 18px; }
nav { display: flex; flex-wrap: wrap; gap: 12px 28px; }
nav a { font-size: 15px; color: #53635a; text-decoration: none; display: inline-flex; min-height: 44px; align-items: center; }
nav a:hover, .account-note a:hover, .install-note a:hover { color: #143f35; text-decoration: underline; }
.hero { display: grid; grid-template-columns: 1.04fr 1fr; gap: 48px; align-items: center; padding-top: 56px; }
.hero-copy { min-width: 0; }
.eyebrow { text-transform: uppercase; font-size: 13px; font-weight: 700; letter-spacing: 1.2px; color: #143f35; margin: 0 0 28px; }
.product-name { font-size: 21px; font-weight: 700; margin: 0 0 24px; }
h1 { font-size: clamp(34px, 3.8vw, 55px); line-height: 1.38; letter-spacing: -1.5px; color: #143f35; margin: 0; }
.intro { font-size: 18px; color: #68746d; margin: 26px 0 32px; line-height: 1.9; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; }
.button { min-height: 54px; padding: 12px 21px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 1px solid transparent; border-radius: 8px; text-decoration: none; text-align: center; font-size: 16px; font-weight: 600; cursor: pointer; transition: background .15s ease; }
.primary { background: #143f35; color: #fff; }
.primary:hover { background: #235a49; }
.secondary { background: transparent; border-color: #aebdb0; color: #143f35; }
.secondary:hover { background: #eaeee4; }
.button:disabled { cursor: default; background: #e1e5dc; color: #526057; border-color: #d1d9ce; }
.release-line { margin: 24px 0 8px; color: #68746d; font-size: 14px; }
.release-line > span:first-child { margin: 0 12px; }
.account-note { font-size: 13px; color: #68746d; margin: 0; }
.release-feedback { min-height: 44px; display: flex; flex-wrap: wrap; gap: 0 14px; align-items: center; font-size: 13px; color: #53635a; }
.release-feedback p { margin: 0; }
.text-button { color: #143f35; background: none; border: 0; padding: 8px 0; min-height: 44px; text-decoration: underline; text-underline-offset: 4px; cursor: pointer; font-size: 13px; }
.text-button:disabled { cursor: wait; }
.no-script { font-size: 14px; }
.model-figure { position: relative; margin: 0; border-radius: 18px; overflow: hidden; background: #eaeee4; }
.model-figure img { width: 100%; height: auto; display: block; }
figcaption { position: absolute; top: 24px; left: 26px; background: #fff; border-radius: 20px; padding: 5px 15px; font-size: 12px; color: #53635a; }
.section { padding-top: 72px; }
h2 { font-size: clamp(26px, 2.4vw, 34px); line-height: 1.45; color: #143f35; margin: 0; letter-spacing: -.6px; }
.section-intro { color: #68746d; margin: 16px 0 0; font-size: 17px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin: 44px 0 50px; }
.feature-grid article { padding: 0 30px; border-left: 1px solid #dee2d8; }
.feature-grid article:first-child { padding-left: 0; border: 0; }
.feature-grid article:last-child { padding-right: 0; }
.number { color: #71816a; font-size: 16px; font-weight: 700; }
h3 { font-size: 23px; line-height: 1.5; margin: 20px 0 12px; }
.feature-grid p, .steps p { color: #68746d; margin: 0; font-size: 16px; }
.install { border-top: 1px solid #dee2d8; padding-top: 44px; }
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 44px; list-style: none; counter-reset: steps; padding: 0; margin: 36px 0 24px; }
.steps li { counter-increment: steps; }
.steps h3 { display: flex; align-items: center; gap: 14px; font-size: 20px; margin-top: 0; }
.steps h3::before { content: counter(steps); width: 38px; height: 38px; flex: 0 0 38px; display: grid; place-items: center; border-radius: 50%; background: #143f35; color: #fff; font-size: 18px; }
.install-note { font-size: 14px; color: #68746d; }
.download-panel { margin-top: 64px; background: #143f35; color: #fff; border-radius: 14px; padding: 32px; display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 36px; align-items: center; }
.download-panel h2 { color: #fff; font-size: clamp(25px, 2.25vw, 31px); }
.download-panel p { color: #d2e0d6; margin: 16px 0 10px; }
.download-actions { display: flex; flex-direction: column; gap: 8px; align-items: center; }
.light { color: #143f35; background: #fff; }
.light:hover { background: #e8eee7; }
.panel-help { font-size: 14px; color: #d2e0d6; padding: 10px; min-height: 44px; }
details { color: #d2e0d6; font-size: 14px; }
summary { cursor: pointer; padding: 9px 0; min-height: 44px; }
dl { margin: 8px 0; }
dl > div + div { margin-top: 12px; }
dt { color: #bbcfc1; }
dd { margin: 4px 0 0; font-family: Consolas, monospace; overflow-wrap: anywhere; }
.site-footer { display: flex; justify-content: space-between; gap: 24px; align-items: center; padding-block: 30px; color: #68746d; font-size: 14px; }
.site-footer p { margin: 0; }
@media (max-width: 1000px) {
  .hero { gap: 28px; }
  h1 { font-size: 38px; }
  .desktop-break { display: none; }
  .brand span { display: none; }
  .feature-grid article { padding-inline: 22px; }
  h3 { font-size: 20px; }
  .steps { gap: 24px; }
  .download-panel { grid-template-columns: minmax(0, 1fr); }
  .download-actions { align-items: flex-start; }
}
@media (max-width: 740px) {
  .wrap { width: calc(100% - 48px); }
  .site-header { min-height: 76px; flex-wrap: wrap; gap: 0; padding-block: 12px; }
  .brand { font-size: 25px; }
  .site-header nav { gap: 12px; }
  .site-header nav a:not(:last-child) { display: none; }
  .hero { grid-template-columns: minmax(0, 1fr); padding-top: 32px; gap: 24px; }
  .eyebrow { margin-bottom: 22px; }
  .product-name { font-size: 19px; }
  h1 { font-size: clamp(27px, 8.5vw, 46px); letter-spacing: -1px; line-height: 1.4; }
  .intro { font-size: 16px; margin-block: 24px 28px; }
  .actions { flex-direction: column; }
  .button { width: 100%; padding-inline: 12px; }
  .release-line { font-size: 13px; }
  .release-line > span:first-child { margin-inline: 6px; }
  .account-note { font-size: 13px; }
  figcaption { top: 16px; left: 16px; }
  .section { padding-top: 44px; }
  .feature-grid { grid-template-columns: minmax(0, 1fr); margin-block: 28px 0; }
  .feature-grid article, .feature-grid article:first-child, .feature-grid article:last-child { padding: 24px 0; border-left: 0; border-bottom: 1px solid #dee2d8; }
  .feature-grid h3 { display: inline; margin-left: 20px; }
  .feature-grid p { margin-top: 12px; }
  .install { border-top: 0; }
  .steps { grid-template-columns: minmax(0, 1fr); gap: 28px; margin-top: 28px; }
  .steps p { padding-left: 52px; }
  .download-panel { padding: 24px; margin-top: 36px; gap: 20px; }
  .download-actions { width: 100%; }
  .site-footer { flex-direction: column; gap: 8px; padding-block: 26px; text-align: center; }
  .site-footer nav { gap: 18px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .button { transition: none; } }