:root { color-scheme: light; --ink: #202439; --muted: #646a79; --line: #dfe3ed; --blue: #555ce1; --paper: #f8f9fc; }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; letter-spacing: 0; }
a { color: inherit; text-decoration: none; }
a:focus-visible { outline: 3px solid var(--blue); outline-offset: 5px; }
img { display: block; max-width: 100%; }
.skip-link { position: absolute; top: -60px; left: 20px; z-index: 5; padding: 10px 14px; background: white; }
.skip-link:focus { top: 12px; }
.wrap { width: min(1160px, calc(100% - 64px)); margin-inline: auto; }
.site-header { height: 78px; border-bottom: 1px solid var(--line); }
.nav { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.nav-actions { display: flex; align-items: center; gap: 25px; }
.nav-actions select { max-width: 120px; min-height: 36px; padding: 0 9px; border: 1px solid var(--line); border-radius: 4px; background: white; color: var(--ink); font: inherit; font-size: 12px; cursor: pointer; }
.nav-actions select:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-size: 19px; font-weight: 760; }
.brand img { width: 38px; height: 38px; border-radius: 9px; }
.nav-links { display: flex; align-items: center; gap: 34px; font-size: 13px; font-weight: 600; color: #545b6e; }
.nav-links a:hover, .footer-links a:hover { color: var(--blue); }
.nav-links .nav-action { color: var(--ink); border-bottom: 1px solid currentColor; padding-bottom: 3px; }
.hero { min-height: min(780px, calc(100svh - 112px)); display: flex; align-items: center; text-align: center; padding: 56px 0 70px; }
.hero-inner { width: 100%; }
.hero-icon { width: clamp(144px, 17vw, 224px); aspect-ratio: 1; margin: 0 auto 32px; border-radius: 23%; box-shadow: 0 28px 64px rgba(52, 62, 128, .14), 0 2px 12px rgba(52, 62, 128, .06); }
.eyebrow { margin: 0 0 15px; color: var(--blue); font-size: 12px; font-weight: 750; letter-spacing: .17em; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 12px; font-size: clamp(56px, 8vw, 100px); line-height: 1.05; font-weight: 720; }
.hero-cn { margin: 0 0 25px; font-size: 17px; font-weight: 650; color: #6d7192; letter-spacing: .35em; text-indent: .35em; }
.hero-line { margin-bottom: 12px; font-size: clamp(25px, 3.3vw, 39px); line-height: 1.3; font-weight: 680; }
.hero-copy { max-width: 560px; margin: 0 auto; color: var(--muted); font-size: 15px; line-height: 1.85; }
.hero-actions { display: flex; justify-content: center; gap: 12px; margin-top: 32px; }
.button { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; gap: 15px; padding: 0 22px; border: 1px solid var(--ink); border-radius: 4px; background: var(--ink); color: white; font-size: 13px; font-weight: 650; transition: transform .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); background: #3c435b; }
.button.secondary { background: transparent; color: var(--ink); border-color: #c9ceda; }
.button.secondary:hover { background: white; }
.button span[aria-hidden] { font-size: 18px; line-height: 1; }
.section-label { color: var(--blue); font-size: 12px; font-weight: 750; letter-spacing: .12em; }
.intro { padding: 96px 0 112px; border-top: 1px solid var(--line); background: white; }
.intro-head { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: end; margin-bottom: 74px; }
.intro h2, .connection h2 { margin: 14px 0 0; font-size: clamp(32px, 4.3vw, 56px); line-height: 1.25; font-weight: 680; }
.intro-head > p { max-width: 415px; margin: 0 0 4px auto; color: var(--muted); line-height: 1.9; font-size: 15px; }
.features { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); }
.feature { min-height: 240px; padding: 29px 38px 0 0; border-right: 1px solid var(--line); }
.feature + .feature { padding-left: 38px; }
.feature:last-child { border-right: 0; }
.feature-number { display: block; margin-bottom: 49px; color: #b6bbca; font-size: 12px; font-weight: 700; }
.feature h3 { margin-bottom: 12px; font-size: 21px; }
.feature p { max-width: 290px; color: var(--muted); font-size: 14px; line-height: 1.8; }
.screenshots { padding: 96px 0 112px; background: #f8f7ff; border-top: 1px solid var(--line); }
.screenshots-head { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 38px; }
.screenshots h2 { margin: 13px 0 12px; font-size: clamp(32px, 4.3vw, 56px); line-height: 1.25; }
.screenshots-head p { margin: 0; color: var(--muted); font-size: 15px; }
.gallery-controls { display: flex; gap: 8px; }
.gallery-controls button { width: 42px; height: 42px; border: 1px solid #cbd0df; border-radius: 4px; background: transparent; color: var(--ink); font: inherit; font-size: 21px; cursor: pointer; }
.gallery-controls button:hover { background: white; }
.gallery-controls button:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; }
.gallery { width: min(1160px, calc(100% - 64px)); margin-inline: auto; display: flex; gap: 18px; overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: thin; padding: 0 0 12px; }
.gallery figure { flex: 0 0 clamp(220px, 24vw, 278px); margin: 0; scroll-snap-align: start; }
.gallery img { width: 100%; height: auto; aspect-ratio: 9 / 16; object-fit: cover; border: 1px solid #e7e7f0; border-radius: 5px; }
.gallery figcaption { margin-top: 14px; color: #666b7c; font-size: 12px; font-weight: 650; }
.connection { padding: 112px 0; background: #e9eee9; }
.connection-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(290px, .72fr); gap: 70px; align-items: center; }
.connection .section-label { color: #376a55; }
.connection h2 { max-width: 650px; }
.connection-copy { max-width: 580px; margin: 28px 0 0; color: #52615c; font-size: 15px; line-height: 1.95; }
.connection-note { margin-top: 35px; padding-top: 20px; border-top: 1px solid #c2cec5; color: #456455; font-size: 13px; line-height: 1.75; }
.icon-pair { display: flex; align-items: center; justify-content: center; gap: 18px; }
.icon-pair img { width: min(42%, 210px); border-radius: 23%; box-shadow: 0 18px 44px rgba(35, 55, 49, .14); }
.icon-pair img:last-child { transform: translateY(40px); }
.closing { padding: 106px 0 116px; text-align: center; }
.closing h2 { margin: 13px 0 18px; font-size: clamp(30px, 4vw, 48px); line-height: 1.3; }
.closing p { margin-bottom: 27px; color: var(--muted); font-size: 15px; }
.site-footer { border-top: 1px solid var(--line); }
.footer-inner { min-height: 92px; display: flex; align-items: center; justify-content: space-between; gap: 20px; color: var(--muted); font-size: 12px; }
.footer-links { display: flex; gap: 24px; }
@media (max-width: 700px) {
  .wrap { width: min(100% - 40px, 520px); }
  .site-header { height: 66px; }
  .brand { font-size: 17px; }
  .brand img { width: 34px; height: 34px; }
  .nav { gap: 8px; }
  .nav-actions { gap: 10px; }
  .nav-actions select { max-width: 110px; }
  .nav-links { gap: 18px; font-size: 12px; }
  .nav-links a:first-child { display: none; }
  .hero { min-height: min(690px, calc(100svh - 95px)); padding: 44px 0 58px; }
  .hero-icon { margin-bottom: 27px; }
  .hero-cn { margin-bottom: 22px; }
  .hero-copy { max-width: 340px; font-size: 14px; }
  .hero-actions { flex-wrap: wrap; }
  .intro { padding: 75px 0 78px; }
  .intro-head { display: block; margin-bottom: 45px; }
  .intro-head > p { margin: 24px 0 0; }
  .features { display: block; }
  .feature, .feature + .feature { min-height: 0; padding: 23px 0 25px; border-right: 0; border-bottom: 1px solid var(--line); }
  .feature-number { margin-bottom: 26px; }
  .feature p { margin-bottom: 0; }
  .screenshots { padding: 75px 0 80px; }
  .screenshots-head { align-items: end; }
  .gallery { width: calc(100% - 40px); }
  .gallery figure { flex-basis: min(70vw, 278px); }
  .connection { padding: 80px 0 100px; }
  .connection-grid { grid-template-columns: 1fr; gap: 45px; }
  .icon-pair { max-width: 400px; margin-inline: auto; }
  .closing { padding: 80px 0 86px; }
  .footer-inner { padding: 26px 0; flex-wrap: wrap; }
}
@media (max-width: 390px) {
  .nav-links { gap: 12px; }
  .nav-links a:nth-child(2) { display: none; }
  .hero-actions { flex-direction: column; align-items: stretch; max-width: 240px; margin-inline: auto; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .button { transition: none; } }