:root {
  color-scheme: light;
  --page: #f5f7fb;
  --surface: #ffffff;
  --ink: #16213b;
  --muted: #5e6b81;
  --line: #e3e8f1;
  --accent: #2458dc;
  --accent-deep: #1d46b4;
  --accent-soft: #edf2ff;
  --radius: 20px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--page);
  -webkit-font-smoothing: antialiased;
}
* { box-sizing: border-box; }
body { margin: 0; }
a { color: var(--accent); text-decoration: none; }
svg { display: block; flex-shrink: 0; }
h1, h2, h3, p, dl, dd { margin: 0; }
a:focus-visible, summary:focus-visible { outline: 3px solid #779cff; outline-offset: 5px; }
.skip-link { position: fixed; top: 12px; left: 12px; z-index: 2; padding: 10px 16px; background: white; border: 2px solid var(--accent); border-radius: 8px; transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }
.site-header { background: var(--surface); border-bottom: 1px solid var(--line); }
.header-inner, .page, .site-footer { width: min(1120px, calc(100% - 64px)); margin-inline: auto; }
.header-inner { min-height: 88px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--ink); font-size: 1.125rem; font-weight: 700; }
.brand-divider { color: #95a2b8; margin-inline: 3px; }
.brand-symbol { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 11px; background: var(--accent); }
.brand-symbol svg { width: 32px; height: 32px; stroke: white; stroke-width: 1.8; }
.header-domain { font-family: "Cascadia Code", Consolas, monospace; font-size: .8125rem; color: var(--muted); }
.page { padding-block: 43px 52px; }
.page-heading { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; margin-bottom: 25px; }
.eyebrow { font-size: .875rem; color: var(--muted); margin-bottom: 7px; }
h1 { font-size: 1.625rem; line-height: 1.45; letter-spacing: -.025em; font-weight: 650; }
.platform-label { display: inline-flex; align-items: center; gap: 8px; font-size: .875rem; color: var(--muted); padding-bottom: 4px; }
.platform-label svg { width: 17px; height: 17px; fill: #6781a8; }
.software-card { display: grid; grid-template-columns: minmax(0, 1fr) 338px; grid-template-areas: "intro download" "features download"; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: 0 12px 36px -24px #1d356c50; overflow: hidden; }
.software-intro { grid-area: intro; padding: 36px 36px 0; }
.software-title-row { display: flex; align-items: center; gap: 18px; }
.app-icon { width: 68px; height: 68px; flex-shrink: 0; display: grid; place-items: center; border-radius: 18px; background: var(--accent-soft); border: 1px solid #e0e9ff; }
.app-icon svg { width: 48px; height: 48px; stroke: var(--accent); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.software-title-line { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; }
.software-title-line h2 { font-size: 1.75rem; font-weight: 700; letter-spacing: -.025em; line-height: 1.35; }
.version-pill { display: inline-block; font-size: .8125rem; color: var(--accent-deep); background: var(--accent-soft); padding: 2px 8px; border-radius: 6px; font-weight: 600; line-height: 1.7; }
.software-subtitle { font-size: .9375rem; color: var(--muted); margin-top: 5px; }
.software-description { margin-top: 27px; max-width: 540px; color: var(--muted); font-size: 1rem; line-height: 1.9; }
.feature-grid { grid-area: features; display: grid; grid-template-columns: 1fr 1fr; column-gap: 24px; row-gap: 29px; padding-top: 27px; margin: 27px 36px 36px; border-top: 1px solid var(--line); }
.feature { display: flex; align-items: flex-start; gap: 11px; min-width: 0; }
.feature > svg { width: 21px; height: 21px; margin-top: 3px; stroke: #4267ac; stroke-width: 1.65; stroke-linecap: round; stroke-linejoin: round; }
.feature h3 { font-size: .9375rem; font-weight: 600; line-height: 1.65; }
.feature p { color: var(--muted); font-size: .875rem; margin-top: 5px; line-height: 1.7; overflow-wrap: anywhere; }
.download-panel { grid-area: download; padding: 29px 28px 26px; border-left: 1px solid var(--line); background: #f9fbff; }
.download-panel-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.download-kicker { color: #446494; font-size: .8125rem; font-weight: 650; letter-spacing: .08em; }
.package-label { border: 1px solid #dce5f3; padding: 2px 8px; color: var(--muted); border-radius: 5px; font-size: .75rem; }
.download-size { font-size: 2.8rem; letter-spacing: -.045em; font-weight: 650; line-height: 1.25; margin-block: 18px; font-variant-numeric: tabular-nums; }
.download-size span { font-size: 1.125rem; color: var(--muted); font-weight: 400; letter-spacing: 0; }
.release-info { display: grid; gap: 9px; font-size: .875rem; }
.release-info > div { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.release-info dt { color: var(--muted); flex-shrink: 0; }
.release-info dd { text-align: right; font-variant-numeric: tabular-nums; }
.download-button { display: flex; align-items: center; justify-content: center; gap: 10px; width: 100%; min-height: 52px; padding: 12px 16px; margin-top: 24px; border-radius: 9px; background: var(--accent); color: white; font-weight: 600; box-shadow: 0 5px 12px #2458dc20; transition: background .15s, box-shadow .15s; }
.download-button svg { width: 20px; height: 20px; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.download-button:hover { background: var(--accent-deep); box-shadow: 0 6px 16px #2458dc35; }
.download-note { font-size: .8125rem; color: var(--muted); text-align: center; margin-top: 11px; line-height: 1.7; }
.checksum-link { display: flex; align-items: center; justify-content: center; gap: 6px; font-size: .8125rem; padding: 11px 4px 0; width: fit-content; margin-inline: auto; }
.checksum-link:hover { text-decoration: underline; text-underline-offset: 4px; }
.checksum-link svg { width: 15px; height: 15px; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.getting-started { margin-top: 40px; }
.section-heading { display: flex; align-items: baseline; gap: 18px; margin-bottom: 20px; }
.section-heading h2 { font-size: 1.125rem; font-weight: 650; }
.section-heading p { font-size: .875rem; color: var(--muted); }
.steps { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 25px; list-style: none; padding: 0; margin: 0; }
.steps li { display: flex; align-items: flex-start; gap: 13px; }
.step-number { display: grid; place-items: center; width: 35px; height: 35px; flex-shrink: 0; margin-top: 1px; border-radius: 50%; border: 1px solid #d6e0f0; background: #edf2fa; color: #42618c; font-size: .8125rem; font-weight: 650; font-variant-numeric: tabular-nums; }
.steps h3 { font-size: 1rem; font-weight: 600; margin-bottom: 5px; }
.steps p { font-size: .875rem; line-height: 1.85; color: var(--muted); }
code { font-family: "Cascadia Code", Consolas, monospace; font-size: .93em; overflow-wrap: anywhere; color: #334f82; }
.folder-note { display: flex; align-items: flex-start; gap: 9px; margin-top: 22px; padding: 13px 16px; border-radius: 9px; background: #edf1f7; color: #596981; font-size: .875rem; line-height: 1.8; }
.folder-note svg { margin-top: 2px; width: 20px; height: 20px; stroke: #627899; stroke-width: 1.6; stroke-linejoin: round; }
.faq { margin-top: 36px; }
.faq .section-heading { margin-bottom: 12px; }
.faq-list { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 16px 0; cursor: pointer; font-size: .9375rem; line-height: 1.7; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary > span { font-size: 1.25rem; color: #627899; flex-shrink: 0; width: 24px; text-align: center; transition: transform .15s; }
.faq details[open] summary > span { transform: rotate(45deg); }
.faq details > p { max-width: 930px; padding-bottom: 20px; padding-right: 40px; color: var(--muted); font-size: .875rem; line-height: 1.95; }
.site-footer { border-top: 1px solid var(--line); padding-block: 22px 28px; display: flex; justify-content: space-between; gap: 16px; color: var(--muted); font-size: .8125rem; }
@media (max-width: 980px) {
  .header-inner, .page, .site-footer { width: min(1120px, calc(100% - 40px)); }
  .software-card { grid-template-columns: minmax(0, 1fr) 310px; }
  .software-intro { padding: 28px 28px 0; }
  .download-panel { padding: 26px 22px; }
  .feature-grid { grid-template-columns: 1fr; gap: 21px; margin-inline: 28px; margin-bottom: 28px; }
  .software-title-row { gap: 13px; }
  .software-title-line h2 { font-size: 1.5rem; }
  .app-icon { width: 58px; height: 58px; border-radius: 15px; }
  .steps { gap: 18px; }
}
@media (max-width: 720px) {
  .header-inner { min-height: 76px; }
  .header-domain { display: none; }
  .page { padding-top: 28px; padding-bottom: 34px; }
  .page-heading { align-items: flex-start; flex-direction: column; gap: 10px; margin-bottom: 20px; }
  h1 { font-size: 1.5rem; }
  .software-card { grid-template-columns: minmax(0, 1fr); grid-template-areas: "intro" "download" "features"; border-radius: 16px; }
  .software-intro { padding: 25px 24px; }
  .software-description { margin-top: 20px; }
  .feature-grid { grid-template-columns: 1fr 1fr; gap: 23px 20px; padding-top: 0; margin: 24px; border-top: 0; }
  .download-panel { border-left: 0; border-top: 1px solid var(--line); padding: 24px; }
  .download-size { font-size: 2.5rem; margin-block: 12px 19px; }
  .download-button { margin-top: 16px; }
  .getting-started { margin-top: 30px; }
  .section-heading { flex-wrap: wrap; gap: 4px 14px; margin-bottom: 18px; }
  .steps { grid-template-columns: 1fr; gap: 21px; }
  .folder-note { padding: 12px 14px; }
  .faq { margin-top: 28px; }
  .site-footer { flex-direction: column; gap: 5px; }
}
@media (max-width: 430px) {
  .header-inner, .page, .site-footer { width: calc(100% - 32px); }
  .brand { font-size: 1rem; gap: 10px; }
  .software-intro { padding: 22px 20px; }
  .software-title-row { align-items: flex-start; }
  .software-title-line { gap: 8px; }
  .software-title-line h2 { font-size: 1.375rem; }
  .software-subtitle { font-size: .875rem; }
  .app-icon { width: 52px; height: 52px; border-radius: 13px; }
  .app-icon svg { width: 38px; height: 38px; }
  .feature-grid { grid-template-columns: 1fr; gap: 19px; margin: 22px 20px; }
  .download-panel { padding: 22px 20px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; scroll-behavior: auto !important; }
}