:root { color-scheme: light; --ink: #17202e; --muted: #5d6878; --blue: #0767ef; --blue-dark: #034bb3; --line: #e3e7ee; --paper: #f8f9fc; --white: #fff; }
* { box-sizing: border-box; }
html { scroll-padding-top: 90px; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; font-size: 16px; line-height: 1.65; -webkit-font-smoothing: antialiased; }
a { color: var(--blue); text-decoration: none; text-underline-offset: 4px; }
a:hover { text-decoration: underline; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
:focus-visible { outline: 3px solid #6499fa; outline-offset: 4px; }
img { display: block; max-width: 100%; height: auto; }
figure, p { margin: 0; }
h1, h2, h3 { margin: 0; line-height: 1.25; letter-spacing: -.035em; }
[hidden] { display: none !important; }
.skip-link { position: absolute; z-index: 10; left: 16px; top: -80px; padding: 10px 16px; background: var(--white); border: 1px solid var(--blue); border-radius: 8px; }
.skip-link:focus { top: 12px; }
.site-header { max-width: 1120px; margin: auto; padding: 22px 28px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 750; font-size: 23px; color: var(--ink); letter-spacing: -.05em; }
.brand:hover { text-decoration: none; }
.brand img { border: 1px solid #e8e9eb; border-radius: 10px; box-shadow: 0 2px 5px #1821370a; }
nav { display: flex; gap: 26px; align-items: center; }
nav a { font-size: 14px; color: var(--muted); font-weight: 550; }
.hero { max-width: 1100px; margin: auto; padding: 62px 28px 72px; text-align: center; }
.eyebrow { color: var(--blue); font-size: 12px; line-height: 1.5; font-weight: 750; letter-spacing: .12em; }
.hero h1 { margin: 18px auto 19px; font-size: clamp(30px, 4.3vw, 49px); max-width: 980px; font-weight: 760; }
.title-dot { color: #b0b8c5; font-weight: 450; }
.intro { max-width: 820px; margin: auto; font-size: 18px; color: var(--muted); }
.hero-demo { margin: 36px auto 26px; position: relative; background: var(--white); border: 1px solid #dce2eb; border-radius: 18px; overflow: hidden; box-shadow: 0 20px 60px #1d3b6810, 0 4px 10px #1d3b6806; }
.media-bar { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 16px; border-bottom: 1px solid var(--line); background: #fbfcfe; color: #6a7383; font-size: 12px; }
.window-dots { display: flex; gap: 6px; min-width: 62px; }
.window-dots i { width: 8px; height: 8px; border-radius: 50%; background: #d7dce4; }
.media-label { font-size: 11px; color: #798391; }
.demo-full-size { display: block; background: #f8f9fc; }
.demo-full-size img { width: 100%; height: 560px; object-fit: contain; }
.demo-full-size:hover { background: #f0f3f8; }
.hero-demo .demo-still { display: none; }
.hero-demo figcaption { padding: 10px 78px; font-size: 11px; color: #77818e; background: #fff; }
.motion-toggle { position: absolute; right: 12px; bottom: 8px; padding: 2px 8px; border-radius: 5px; border: 1px solid var(--line); background: #fff; color: var(--muted); cursor: pointer; font-size: 11px; }
.hero-demo.is-paused .demo-motion { display: none; }
.hero-demo.is-paused .demo-still { display: block; }
.download-actions { display: flex; align-items: center; justify-content: center; gap: 12px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 11px; min-height: 49px; padding: 12px 23px; border-radius: 11px; font-size: 15px; font-weight: 650; line-height: 1.4; border: 1px solid transparent; }
.button:hover { text-decoration: none; }
.primary { color: #fff; background: var(--blue); box-shadow: 0 4px 10px #0767ef18; }
.primary:hover { background: var(--blue-dark); }
.secondary { color: var(--ink); background: #fff; border-color: #dce2eb; }
.secondary:hover { background: #f0f4fa; }
.platforms { display: flex; justify-content: center; flex-wrap: wrap; gap: 8px 21px; margin-top: 15px; font-size: 12px; color: #697687; }
.platforms span + span::before { content: "·"; margin-right: 21px; color: #aeb6c1; }
.first-open-note { max-width: 790px; margin: 17px auto 0; font-size: 12px; color: #737d8b; }
.first-open-note a { white-space: nowrap; }
.section { max-width: 1120px; margin: auto; padding: 70px 28px; border-top: 1px solid var(--line); }
.section-heading { max-width: 720px; margin-bottom: 32px; }
.section-heading h2 { font-size: clamp(27px, 3.2vw, 37px); margin: 12px 0 14px; }
.section-heading > p:last-child { color: var(--muted); }
.scene-card { display: grid; grid-template-columns: 1fr 1.35fr; margin-top: 24px; background: var(--white); border: 1px solid var(--line); border-radius: 20px; overflow: hidden; }
.scene-copy { padding: 40px 35px; display: flex; flex-direction: column; justify-content: center; }
.scene-number { font-size: 12px; font-weight: 650; color: var(--blue); margin-bottom: 19px; }
.scene-copy h3 { font-size: 25px; max-width: 290px; margin-bottom: 17px; line-height: 1.4; }
.scene-copy > p { color: var(--muted); font-size: 15px; line-height: 1.9; }
.scene-copy .scene-detail { margin-top: 18px; font-size: 12px; line-height: 1.8; color: #7b8593; }
kbd { display: inline-block; background: #f1f3f7; border: 1px solid #dfe4ec; border-bottom-width: 2px; border-radius: 4px; padding: 0 5px; font-size: .9em; line-height: 1.55; font-family: inherit; color: #344154; margin: 0 2px; white-space: nowrap; }
code { background: #f0f3f7; border-radius: 4px; padding: 2px 5px; font-size: .9em; }
.scene-card figure { background: #f0f3f8; padding: 24px; align-self: stretch; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; min-width: 0; }
.scene-card figure img { width: 100%; border-radius: 9px; box-shadow: 0 5px 22px #273f5d14; border: 1px solid #dce3eb; }
.scene-card figure > a { display: block; width: 100%; }
.scene-card figcaption { font-size: 11px; color: #768292; text-align: center; }
.section-footnote { margin-top: 23px; color: #798492; font-size: 12px; line-height: 1.9; }
.table-scroll { overflow-x: auto; border-radius: 16px; border: 1px solid var(--line); background: #fff; }
table { border-collapse: collapse; width: 100%; text-align: left; font-size: 14px; }
th, td { padding: 19px 22px; vertical-align: top; border-bottom: 1px solid #eaedf2; }
thead th { font-size: 12px; color: #6c7785; background: #f2f5fa; font-weight: 650; }
tbody th { width: 22%; min-width: 150px; font-weight: 600; }
td:nth-child(2) { width: 22%; min-width: 155px; }
td:last-child { color: var(--muted); line-height: 1.8; }
tr:last-child th, tr:last-child td { border-bottom: 0; }
.status { font-size: 11px; border-radius: 20px; padding: 4px 9px; display: inline-block; white-space: nowrap; }
.ready { background: #edf5ff; color: #2867b2; }
.configure { background: #f2f3f6; color: #616c7b; }
.version-note { padding: 20px 22px; border: 1px solid #dfe7f2; background: #f0f5fc; border-radius: 13px; font-size: 13px; color: #53647c; margin-top: 17px; line-height: 1.8; }
.version-note > strong { color: #334e75; }
.version-note p { margin-top: 6px; }
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 28px 40px; }
.steps li { display: flex; gap: 16px; }
.step-marker { width: 31px; height: 31px; border-radius: 50%; background: #e7effe; color: #2768d3; flex: 0 0 31px; display: grid; place-items: center; font-size: 13px; font-weight: 650; }
.steps h3 { font-size: 18px; line-height: 31px; margin-bottom: 9px; }
.steps p { font-size: 14px; color: var(--muted); line-height: 1.9; }
.steps strong { font-weight: 600; color: #344154; }
.start-links { display: flex; gap: 26px; flex-wrap: wrap; margin-top: 28px; }
.text-link { font-size: 13px; font-weight: 600; }
.closing { text-align: center; padding: 62px 24px 78px; background: #eef3fb; border-top: 1px solid #e3eaf5; border-bottom: 1px solid #e3eaf5; }
.closing img { margin: 0 auto 20px; border: 1px solid #e0e4eb; border-radius: 17px; box-shadow: 0 4px 10px #17202e08; }
.closing h2 { font-size: clamp(24px, 3.2vw, 34px); margin-bottom: 15px; }
.closing p { color: var(--muted); font-size: 15px; margin-bottom: 24px; }
.site-footer { max-width: 1120px; margin: auto; padding: 35px 28px; display: flex; align-items: start; justify-content: space-between; flex-wrap: wrap; gap: 24px; }
.site-footer > div { max-width: 500px; }
.site-footer p { font-size: 11px; color: #7b8594; margin-top: 10px; line-height: 1.9; }
.site-footer nav { gap: 20px; padding-top: 8px; flex-wrap: wrap; }
.site-footer nav a { font-size: 12px; }
.site-footer .privacy-note { width: 100%; margin: 0; }
.download-main { max-width: 770px; margin: auto; padding: 50px 24px 70px; }
.download-card { border-radius: 23px; border: 1px solid var(--line); background: #fff; box-shadow: 0 12px 40px #233b5f08; padding: 44px 30px; text-align: center; }
.download-icon { border: 1px solid var(--line); border-radius: 20px; margin: 0 auto 23px; }
.download-card h1 { font-size: 37px; margin: 10px 0 16px; }
.download-card > p:not(.eyebrow) { font-size: 14px; color: var(--muted); }
.download-card .download-status { margin-top: 24px; min-height: 25px; }
.download-card .download-file { margin-top: 16px; }
.download-card .file-detail { font-size: 11px !important; overflow-wrap: anywhere; margin: 12px 0 3px; }
.download-card #checksum-link { font-size: 11px; font-weight: 400; }
.download-alternatives { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px 22px; border-top: 1px solid var(--line); padding-top: 23px; margin-top: 26px; }
.download-alternatives a { font-size: 12px; }
.download-help { padding: 30px 9px 0; }
.download-help h2 { font-size: 20px; margin-bottom: 12px; }
.download-help p { font-size: 13px; color: var(--muted); line-height: 1.9; margin-bottom: 12px; }
.site-footer.compact { justify-content: center; border-top: 1px solid var(--line); text-align: center; }
@media (max-width: 760px) {
  .site-header { padding: 18px 20px; gap: 16px; }
  nav { gap: 15px; }
  nav a { font-size: 12px; }
  .hero { padding: 38px 20px 48px; }
  .hero h1 { max-width: 520px; font-size: 34px; line-height: 1.3; }
  .hero h1 > span:last-child { display: block; margin-top: 8px; font-size: 25px; }
  .title-dot { display: none; }
  .intro { font-size: 15px; max-width: 520px; }
  .hero-demo { margin-top: 27px; border-radius: 12px; }
  .demo-full-size img { height: min(560px, 115vw); }
  .media-bar { font-size: 10px; padding: 9px 12px; }
  .media-label { display: none; }
  .window-dots { min-width: auto; }
  .hero-demo figcaption { text-align: left; padding: 9px 75px 9px 12px; font-size: 9px; }
  .motion-toggle { bottom: 10px; font-size: 10px; }
  .platforms { gap: 5px 12px; font-size: 11px; }
  .platforms span + span::before { margin-right: 12px; }
  .first-open-note { font-size: 11px; max-width: 500px; }
  .button { padding: 12px 17px; font-size: 14px; }
  .section { padding: 46px 20px; }
  .section-heading h2 { font-size: 29px; }
  .section-heading > p:last-child { font-size: 14px; }
  .scene-card { grid-template-columns: 1fr; border-radius: 16px; }
  .scene-copy { padding: 27px 24px 25px; }
  .scene-number { margin-bottom: 12px; }
  .scene-copy h3 { max-width: none; font-size: 23px; }
  .scene-card figure { padding: 20px; }
  .scene-copy .scene-detail { margin-top: 12px; }
  table { min-width: 620px; font-size: 13px; }
  th, td { padding: 15px 17px; }
  .steps { grid-template-columns: 1fr; gap: 23px; }
  .site-footer { padding: 29px 20px; }
  .site-footer nav { padding-top: 0; }
  .download-main { padding-top: 26px; }
  .download-card { padding: 32px 20px; }
  .download-card h1 { font-size: 31px; }
}
@media (prefers-reduced-motion: reduce) {
  .hero-demo:not(.motion-enabled) .demo-motion { display: none; }
  .hero-demo:not(.motion-enabled) .demo-still { display: block; }
}