:root {
  --bg: #f6f6f7;
  --surface: #ffffff;
  --ink: #171719;
  --muted: #68686f;
  --line: #e8e8eb;
  --brand: #d90d32;
  --brand-dark: #b80a2a;
  --soft-red: #fff0f3;
  --radius: 26px;
  --shadow: 0 24px 80px rgba(18, 18, 22, .08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: Inter, "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
svg { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  max-width: 1440px;
  height: 76px;
  margin: 0 auto;
  padding: 0 38px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  background: rgba(246, 246, 247, .84);
  border-bottom: 1px solid rgba(224, 224, 227, .7);
  backdrop-filter: blur(18px);
}
.brand { display: flex; align-items: center; gap: 11px; width: max-content; font-weight: 750; }
.brand img { width: 34px; height: 34px; border-radius: 10px; }
.site-header nav { display: flex; gap: 32px; color: #55555c; font-size: 14px; }
.site-header nav a { transition: color .2s ease; }
.site-header nav a:hover { color: var(--ink); }
.header-download {
  justify-self: end;
  padding: 11px 18px;
  border-radius: 12px;
  background: var(--ink);
  color: white;
  font-size: 13px;
  font-weight: 700;
  transition: transform .2s ease, background .2s ease;
}
.header-download:hover { background: var(--brand); transform: translateY(-1px); }

main { overflow: hidden; }
.hero {
  max-width: 1380px;
  min-height: 760px;
  margin: 0 auto;
  padding: 96px 52px 82px;
  display: grid;
  grid-template-columns: .84fr 1.16fr;
  gap: 74px;
  align-items: center;
}
.eyebrow {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 24px;
  color: #66666d;
  font-size: 12px;
  font-weight: 750;
  letter-spacing: .14em;
}
.eyebrow span { width: 7px; height: 7px; border-radius: 50%; background: var(--brand); box-shadow: 0 0 0 5px rgba(217, 13, 50, .1); }
.hero h1 {
  margin: 0;
  font-size: clamp(54px, 5.2vw, 80px);
  line-height: 1.06;
  letter-spacing: -.055em;
}
.hero h1 em { color: var(--brand); font-style: normal; }
.hero-description {
  max-width: 555px;
  margin: 30px 0 34px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.9;
}
.hero-actions { display: flex; align-items: center; gap: 24px; }
.download-button {
  min-width: 230px;
  padding: 13px 20px 13px 15px;
  display: flex;
  align-items: center;
  gap: 13px;
  border-radius: 16px;
  color: white;
  background: var(--brand);
  box-shadow: 0 14px 28px rgba(217, 13, 50, .2);
  transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
}
.download-button:hover { transform: translateY(-2px); background: var(--brand-dark); box-shadow: 0 18px 34px rgba(217, 13, 50, .26); }
.download-icon { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 12px; background: rgba(255,255,255,.15); }
.download-icon svg { width: 23px; height: 23px; }
.download-button small, .download-button strong { display: block; }
.download-button small { margin-bottom: 2px; color: rgba(255,255,255,.7); font-size: 10px; font-weight: 500; }
.download-button strong { font-size: 15px; }
.text-button {
  padding: 10px 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 0;
  background: transparent;
  color: #4d4d53;
  font: inherit;
  font-size: 13px;
  font-weight: 650;
  cursor: pointer;
}
.text-button svg { width: 16px; height: 16px; transition: transform .2s ease; }
.text-button:hover svg { transform: translateX(3px); }
.release-meta { margin-top: 20px; display: flex; align-items: center; gap: 11px; color: #8a8a91; font-size: 11px; }
.release-meta b { color: #55555c; }
.release-meta i { width: 3px; height: 3px; border-radius: 50%; background: #b8b8bd; }

.hero-visual { position: relative; min-width: 0; }
.visual-glow {
  position: absolute;
  inset: 3% 4% -8%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(225, 39, 73, .17), rgba(225, 39, 73, 0) 68%);
  filter: blur(20px);
}
.app-window {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.85);
  border-radius: 22px;
  background: #fff;
  box-shadow: 0 45px 90px rgba(28, 28, 33, .16), 0 2px 8px rgba(28,28,33,.06);
  transform: perspective(1400px) rotateY(-4deg) rotateX(1deg);
}
.window-top { height: 55px; padding: 0 18px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; border-bottom: 1px solid #ececf0; background: #fafafa; }
.traffic-lights { display: flex; gap: 7px; }
.traffic-lights span { width: 9px; height: 9px; border-radius: 50%; background: #ff5f57; }
.traffic-lights span:nth-child(2) { background: #febc2e; }
.traffic-lights span:nth-child(3) { background: #28c840; }
.window-title { font-size: 11px; font-weight: 700; color: #44444a; }
.window-status { justify-self: end; color: #8c8c92; font-size: 9px; }
.window-status span { display: inline-block; width: 6px; height: 6px; margin-right: 5px; border-radius: 50%; background: #25b868; }
.window-body { min-height: 450px; display: grid; grid-template-columns: 150px 1fr; background: #f7f7f9; }
.window-body aside { padding: 23px 13px; color: #aaaab1; background: #1e1e22; }
.mini-brand { padding: 0 7px 23px; display: flex; align-items: center; gap: 8px; color: white; font-size: 10px; font-weight: 700; }
.mini-brand img { width: 25px; height: 25px; border-radius: 8px; }
.nav-item { margin: 4px 0; padding: 11px 12px; border-radius: 9px; font-size: 9px; }
.nav-item.active { color: white; background: var(--brand); }
.workspace { padding: 27px 25px; }
.workspace-head { display: flex; align-items: center; justify-content: space-between; }
.skeleton-title, .skeleton-subtitle { display: block; border-radius: 5px; background: #232328; }
.skeleton-title { width: 100px; height: 13px; }
.skeleton-subtitle { width: 172px; height: 7px; margin-top: 9px; background: #cfcfd5; }
.status-pill { padding: 7px 10px; border-radius: 20px; color: var(--brand); background: var(--soft-red); font-size: 8px; font-weight: 700; }
.metric-grid { margin-top: 23px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.metric { padding: 15px; border: 1px solid #ececf0; border-radius: 13px; background: white; }
.metric span, .metric small { display: block; color: #9999a0; font-size: 7px; }
.metric strong { display: block; margin: 5px 0 3px; font-size: 22px; letter-spacing: -.04em; }
.task-card { margin-top: 14px; padding: 17px; border: 1px solid #ececf0; border-radius: 14px; background: white; }
.task-head { display: flex; justify-content: space-between; font-size: 9px; }
.task-head span { color: var(--brand); font-weight: 750; }
.progress { height: 5px; margin: 12px 0 13px; overflow: hidden; border-radius: 5px; background: #eeeef1; }
.progress span { display: block; width: 94%; height: 100%; border-radius: inherit; background: var(--brand); }
.task-row { padding: 10px 0; display: grid; grid-template-columns: 21px 1fr auto; align-items: center; border-top: 1px solid #f0f0f2; color: #5e5e64; font-size: 8px; }
.task-row i { width: 15px; height: 15px; display: grid; place-items: center; border-radius: 50%; color: #777; background: #f1f1f3; font-size: 7px; font-style: normal; }
.task-row i.done { color: #16824c; background: #e9f8f0; }
.task-row b { color: #93939a; font-size: 7px; }
.task-row b.working { color: var(--brand); }

.statement { padding: 130px 30px; text-align: center; background: var(--ink); color: white; }
.statement p { margin: 0; font-size: clamp(32px, 4.2vw, 58px); line-height: 1.35; letter-spacing: -.045em; }

.features { max-width: 1320px; margin: 0 auto; padding: 130px 50px 145px; }
.section-heading { display: flex; justify-content: space-between; align-items: flex-start; }
.section-heading > span { padding-top: 10px; color: var(--brand); font-size: 11px; font-weight: 800; letter-spacing: .15em; }
.section-heading h2 { width: 57%; margin: 0; font-size: clamp(38px, 4vw, 58px); line-height: 1.16; letter-spacing: -.045em; }
.feature-grid { margin-top: 75px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; }
.feature-grid article { position: relative; min-height: 310px; padding: 28px; border: 1px solid var(--line); border-radius: 22px; background: var(--surface); transition: transform .25s ease, box-shadow .25s ease; }
.feature-grid article:hover { transform: translateY(-5px); box-shadow: 0 20px 50px rgba(20,20,25,.07); }
.feature-number { position: absolute; top: 25px; right: 27px; color: #b8b8be; font-size: 10px; letter-spacing: .1em; }
.feature-icon { width: 48px; height: 48px; display: grid; place-items: center; border-radius: 15px; }
.feature-icon svg { width: 23px; height: 23px; }
.feature-icon.blue { color: #2e76df; background: #eaf3ff; }
.feature-icon.green { color: #159357; background: #e9f8f0; }
.feature-icon.purple { color: #7650da; background: #f0ecff; }
.feature-icon.orange { color: #e47b24; background: #fff1e6; }
.feature-grid h3 { margin: 102px 0 12px; font-size: 18px; letter-spacing: -.02em; }
.feature-grid p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; }

.download-panel { max-width: 1260px; margin: 0 auto 24px; padding: 66px 70px; display: grid; grid-template-columns: .8fr 1.2fr; gap: 70px; align-items: center; border-radius: 30px; color: white; background: #1c1c20; }
.eyebrow.light { color: #a5a5ab; }
.panel-copy h2 { margin: 0 0 15px; font-size: clamp(36px, 3.5vw, 52px); letter-spacing: -.045em; }
.panel-copy p { margin: 0; color: #a9a9b0; font-size: 14px; line-height: 1.8; }
.download-options { display: grid; gap: 12px; }
.platform-card { padding: 18px 20px; display: grid; grid-template-columns: 48px 1fr auto; align-items: center; gap: 15px; border: 1px solid #35353b; border-radius: 17px; background: #26262b; transition: border .2s ease, background .2s ease, transform .2s ease; }
.platform-card:hover { transform: translateX(3px); border-color: #55555d; background: #2c2c31; }
.platform-logo { width: 46px; height: 46px; display: grid; place-items: center; border-radius: 13px; color: #171719; background: white; }
.platform-logo svg { width: 23px; height: 23px; fill: currentColor; stroke: none; }
.platform-card small, .platform-card strong { display: block; }
.platform-card small { margin-bottom: 4px; color: #9999a1; font-size: 10px; }
.platform-card strong { font-size: 15px; }
.card-arrow { width: 18px; height: 18px; color: #888890; }

.install-notes { max-width: 1260px; margin: 0 auto; padding: 45px 0 125px; display: grid; grid-template-columns: repeat(3, 1fr); }
.install-notes > div { padding: 8px 40px; border-right: 1px solid #dddddf; }
.install-notes > div:first-child { padding-left: 5px; }
.install-notes > div:last-child { border: 0; }
.note-label { color: var(--brand); font-size: 10px; font-weight: 800; letter-spacing: .1em; }
.install-notes h3 { margin: 12px 0 10px; font-size: 16px; }
.install-notes p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.8; }

footer { max-width: 1320px; margin: 0 auto; padding: 38px 50px 45px; display: flex; align-items: center; justify-content: space-between; border-top: 1px solid #dedee1; }
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-brand img { width: 36px; height: 36px; border-radius: 11px; }
.footer-brand strong, .footer-brand span { display: block; }
.footer-brand strong { font-size: 13px; }
.footer-brand span { margin-top: 3px; color: #9999a0; font-size: 10px; }
.footer-meta { display: flex; gap: 25px; align-items: center; color: #898990; font-size: 10px; }
.footer-meta a:hover { color: var(--ink); }

.download-modal { position: fixed; z-index: 50; inset: 0; display: grid; place-items: center; visibility: hidden; opacity: 0; transition: opacity .2s ease, visibility .2s ease; }
.download-modal.open { visibility: visible; opacity: 1; }
.modal-backdrop { position: absolute; inset: 0; border: 0; background: rgba(16,16,19,.52); backdrop-filter: blur(6px); }
.modal-card { position: relative; width: min(480px, calc(100vw - 34px)); padding: 36px; border-radius: 24px; background: white; box-shadow: var(--shadow); transform: translateY(12px); transition: transform .2s ease; }
.download-modal.open .modal-card { transform: translateY(0); }
.modal-close { position: absolute; top: 16px; right: 18px; width: 34px; height: 34px; border: 0; border-radius: 50%; background: #f1f1f3; font-size: 23px; cursor: pointer; }
.modal-kicker { color: var(--brand); font-size: 10px; font-weight: 800; letter-spacing: .14em; }
.modal-card h2 { margin: 10px 0 7px; font-size: 29px; letter-spacing: -.04em; }
.modal-card > p { margin: 0 0 24px; color: var(--muted); font-size: 12px; }
.modal-options { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.modal-options a { padding: 18px; border: 1px solid var(--line); border-radius: 15px; transition: border .2s ease, background .2s ease; }
.modal-options a:hover { border-color: var(--brand); background: var(--soft-red); }
.modal-options strong, .modal-options span { display: block; }
.modal-options strong { font-size: 15px; }
.modal-options span { margin-top: 5px; color: var(--muted); font-size: 10px; }

@media (max-width: 1050px) {
  .hero { grid-template-columns: 1fr; padding-top: 75px; }
  .hero-copy { max-width: 720px; }
  .app-window { transform: none; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .download-panel { margin-inline: 24px; grid-template-columns: 1fr; }
  .install-notes { margin-inline: 25px; }
}

@media (max-width: 720px) {
  .site-header { height: 66px; padding: 0 18px; grid-template-columns: 1fr auto; }
  .site-header nav { display: none; }
  .brand span { font-size: 14px; }
  .header-download { padding: 9px 13px; }
  .hero { min-height: auto; padding: 64px 20px 70px; gap: 58px; }
  .hero h1 { font-size: 48px; }
  .hero-description { font-size: 15px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 12px; }
  .download-button { width: 100%; }
  .text-button { padding-left: 5px; }
  .release-meta { flex-wrap: wrap; }
  .app-window { width: 760px; transform: scale(.63); transform-origin: left top; }
  .hero-visual { height: 320px; }
  .statement { padding: 90px 23px; }
  .features { padding: 90px 20px; }
  .section-heading { display: block; }
  .section-heading h2 { width: 100%; margin-top: 18px; }
  .feature-grid { margin-top: 45px; grid-template-columns: 1fr; }
  .feature-grid article { min-height: 260px; }
  .feature-grid h3 { margin-top: 65px; }
  .download-panel { margin-inline: 14px; padding: 45px 22px; gap: 35px; border-radius: 23px; }
  .platform-card { padding: 15px; }
  .install-notes { padding: 40px 20px 80px; display: block; }
  .install-notes > div, .install-notes > div:first-child { padding: 25px 0; border-right: 0; border-bottom: 1px solid #dedee1; }
  footer { padding: 32px 20px; align-items: flex-start; flex-direction: column; gap: 25px; }
  .footer-meta { flex-wrap: wrap; gap: 15px 22px; }
  .modal-options { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}