:root {
  --ink: #16181d;
  --muted: #5d6670;
  --faint: #8a929c;
  --line: rgba(22, 24, 29, 0.08);
  --line-strong: rgba(22, 24, 29, 0.14);
  --blue: #075bdb;
  --blue-deep: #0548ad;
  --sky: #7eb6ff;
  --bg: #f3f5f7;
  --paper: #ffffff;
  --shadow: 0 18px 50px rgba(22, 24, 29, 0.06);
  --radius: 20px;
  --header: 68px;
  --max: 1120px;
  --sans: "Segoe UI Variable Text", "Segoe UI", "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", sans-serif;
  --display: "Segoe UI Variable Display", "Segoe UI", "PingFang SC", "Microsoft YaHei UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
}
img { display: block; max-width: 100%; }
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }
p { margin: 0; }
h1, h2, h3 { font-family: var(--display); letter-spacing: -0.035em; line-height: 1.18; margin: 0; font-weight: 600; }
section[id] { scroll-margin-top: 84px; }
::selection { background: #d5e4fb; }

.sr, .skip {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.skip:focus {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 20;
  width: auto;
  height: auto;
  margin: 0;
  padding: 8px 12px;
  clip: auto;
  background: #fff;
  border-radius: 8px;
}

.container { width: min(var(--max), calc(100% - 48px)); margin: 0 auto; }
.section { padding: 28px 0 88px; }
.section-muted { background: transparent; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 650;
  letter-spacing: 0.01em;
}
.eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}
.eyebrow-light { color: #b9d4ff; }
.section-head { max-width: 620px; margin-bottom: 28px; }
.section-head h2, .copy h2, .cta h2, .release-copy h2 { font-size: clamp(30px, 3.6vw, 42px); }
.section-head p, .sub { color: var(--muted); font-size: 16.5px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  height: var(--header);
  background: rgba(243, 245, 247, 0.9);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid transparent;
}
.site-header.scrolled { border-bottom-color: var(--line); background: rgba(255, 255, 255, 0.92); }
.nav-wrap {
  width: min(var(--max), calc(100% - 48px));
  height: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 28px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 650; letter-spacing: -0.04em; font-size: 20px; }
.brand span { font-family: var(--display); }
.site-nav { display: flex; gap: 22px; margin-right: auto; }
.site-nav a { color: var(--muted); font-size: 14px; font-weight: 550; }
.site-nav a:hover, .site-nav a[aria-current="true"] { color: var(--ink); }
.nav-actions { display: flex; align-items: center; gap: 4px; }
.nav-toggle { display: none; border: 0; background: transparent; width: 40px; height: 40px; margin-left: auto; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 999px;
  border: 1px solid transparent;
  padding: 10px 16px;
  font-size: 14.5px;
  font-weight: 650;
  background: transparent;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}
.btn:focus-visible, a:focus-visible, .tabs button:focus-visible { outline: 2px solid var(--sky); outline-offset: 3px; }
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-deep); }
.btn-secondary { background: var(--paper); border-color: var(--line-strong); color: var(--ink); }
.btn-secondary:hover { border-color: #b7c0cb; }
.btn-ghost { color: var(--muted); }
.btn-ghost:hover { color: var(--ink); }
.btn-light { background: #fff; color: var(--ink); }
.btn-light:hover { background: #f4f7fb; }
.btn-lg { padding: 12px 20px; font-size: 15px; }

.hero { position: relative; padding: 78px 0 8px; }
.hero-bg {
  position: absolute;
  inset: 0 0 auto;
  height: 560px;
  background:
    radial-gradient(520px 240px at 50% 0%, rgba(7, 91, 219, 0.09), transparent 70%);
  pointer-events: none;
}
.hero-copy { position: relative; text-align: center; max-width: 760px; }
.hero h1 {
  font-size: clamp(46px, 6vw, 72px);
  letter-spacing: -0.05em;
}
.lede {
  max-width: 560px;
  margin: 16px auto 0;
  color: var(--muted);
  font-size: 17px;
}
.hero-actions { display: flex; justify-content: center; gap: 10px; margin-top: 28px; }
.platform-row {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}
.platform-row li {
  padding: 5px 11px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 12.5px;
}

.device {
  position: relative;
  margin-top: 52px;
  background: var(--paper);
  border: 1px solid rgba(22, 24, 29, 0.06);
  border-radius: 24px;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.device-compact { margin-top: 0; }
.device-chrome {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 46px;
  padding: 0 18px;
  background: #fafbfc;
  border-bottom: 1px solid var(--line);
  color: var(--faint);
  font-size: 12.5px;
}
.device-chrome span { display: none; }
.device-chrome strong { margin: 0; font-weight: 600; color: var(--muted); }
.device-body { display: grid; grid-template-columns: 176px 1fr; min-height: 340px; }
.device-body-plain { display: block; padding: 22px; min-height: 300px; }
.side { padding: 20px 12px; background: #171b22; color: #d5dbe3; }
.side p { margin: 4px 10px 12px; font-size: 11px; letter-spacing: 0.12em; color: #8b95a3; }
.side b {
  display: block;
  padding: 9px 12px;
  border-radius: 10px;
  font-weight: 550;
  font-size: 13.5px;
  color: #c9d1db;
}
.side b.on { background: rgba(255, 255, 255, 0.08); color: #fff; }
.device-main { padding: 18px; background: #fbfcfd; }
.searchline {
  height: 40px;
  display: flex;
  align-items: center;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--faint);
  font-size: 13px;
  background: #fff;
}
.profile, .insight-view { margin-top: 14px; }
.device-body-plain .insight-view { margin-top: 0; }
.profile header, .brand-line { display: flex; align-items: center; gap: 12px; }
.profile header p, .brand-line p { color: var(--muted); font-size: 13px; }
.avatar {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: #e8f1ff;
  color: var(--blue);
  font-weight: 700;
  flex: none;
}
.avatar-soft { background: #eef3f8; color: var(--ink); }
.profile header em {
  margin-left: auto;
  font-style: normal;
  font-size: 12px;
  color: var(--muted);
  background: #f3f5f7;
  border-radius: 999px;
  padding: 4px 10px;
}
.metric-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 16px; }
.metric-grid div {
  padding: 14px 14px 12px;
  border-radius: 14px;
  background: #f6f8fa;
}
.metric-grid small, .hint, .split-list span { color: var(--faint); font-size: 12px; }
.metric-grid b { display: block; margin-top: 4px; font-size: 22px; letter-spacing: -0.03em; font-weight: 650; }
.metric-grid em { display: block; margin-top: 4px; color: var(--blue); font-size: 12px; font-style: normal; }
.bars { display: flex; align-items: flex-end; gap: 8px; height: 96px; margin-top: 18px; padding: 0 2px; }
.bars.tall { height: 128px; }
.bars i {
  display: block;
  flex: 1;
  height: var(--h);
  border-radius: 8px 8px 3px 3px;
  background: #075bdb;
  opacity: 0.88;
}
.bars i:nth-child(odd) { opacity: 0.45; }
.hint { margin-top: 14px; }
.split-list, .people, .tags, .check, .chips { list-style: none; margin: 16px 0 0; padding: 0; }
.split-list li, .people li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 0;
  border-top: 1px solid var(--line);
}
.people li { justify-content: flex-start; align-items: center; }
.people i {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: #f3f5f7;
  color: var(--ink);
  font-style: normal;
  font-weight: 700;
  font-size: 12px;
}
.people small { display: block; color: var(--faint); font-size: 12px; }
.tags, .chips { display: flex; flex-wrap: wrap; gap: 8px; }
.tags li, .chips li {
  width: fit-content;
  padding: 6px 10px;
  border-radius: 999px;
  background: #f3f5f7;
  color: var(--ink);
  font-size: 13px;
}

.release {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 36px;
  align-items: center;
  padding: 36px;
  border-radius: 28px;
  color: #f4f7fb;
  background:
    radial-gradient(420px 180px at 100% 0%, rgba(56, 189, 248, 0.18), transparent 60%),
    #171b22;
}
.release-copy h2 { color: #fff; }
.release-copy p:last-child { max-width: 460px; color: #b7c0cb; font-size: 16px; }
.release-file {
  padding: 22px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
}
.release-top { display: flex; align-items: center; gap: 12px; }
.release-top strong { display: block; font-size: 18px; }
.release-top span, .release-file dt { color: #9aa3ae; font-size: 13px; }
.release-file dl { margin: 8px 0 18px; }
.release-file dl div {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.release-file dd { margin: 0; font-weight: 600; word-break: break-all; }
.release-file .btn { width: 100%; }

.card-grid, .quote-grid, .plan-grid { display: grid; gap: 14px; }
.card-grid { grid-template-columns: repeat(4, 1fr); }
.quote-grid, .plan-grid { grid-template-columns: repeat(3, 1fr); }
.card, .quote, .plan {
  background: var(--paper);
  border-radius: var(--radius);
  padding: 24px 22px 22px;
  box-shadow: 0 1px 0 rgba(22, 24, 29, 0.04);
}
.card { min-height: 248px; display: flex; flex-direction: column; }
.card p, .plan > p, .quote blockquote { color: var(--muted); }
.index { color: var(--faint); font-size: 12px; font-weight: 650; letter-spacing: 0.08em; }
.card h3, .plan h3 { margin: 18px 0 8px; font-size: 20px; }
.steps, .chips, .mini-bars, .check { margin-top: auto; padding-top: 18px; }
.card .steps { color: var(--ink); font-size: 13.5px; }
.check li { position: relative; padding-left: 14px; margin-top: 8px; color: var(--ink); font-size: 14px; }
.check li::before { content: ""; position: absolute; left: 0; top: 0.62em; width: 5px; height: 5px; border-radius: 50%; background: var(--blue); }
.mini-bars { display: grid; gap: 8px; }
.mini-bars span { display: block; height: 6px; width: var(--w); border-radius: 99px; background: #c5d8f6; }
.mini-bars span:first-child { background: var(--blue); }

.split { display: grid; grid-template-columns: 0.88fr 1.12fr; gap: 40px; align-items: center; }
.split-reverse { grid-template-columns: 1.12fr 0.88fr; }
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 22px;
  padding: 4px;
  width: fit-content;
  border-radius: 999px;
  background: rgba(22, 24, 29, 0.04);
}
.tabs button {
  border: 0;
  background: transparent;
  border-radius: 999px;
  padding: 8px 12px;
  color: var(--muted);
  font-size: 14px;
}
.tabs button[aria-selected="true"] { background: #fff; color: var(--ink); box-shadow: 0 1px 2px rgba(22, 24, 29, 0.06); }
.tab-copy { min-height: 72px; margin-top: 16px; color: var(--muted); }

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin: 8px 0 0;
  padding: 8px 8px 12px;
  list-style: none;
  background: var(--paper);
  border-radius: 24px;
}
.stats li { padding: 28px 24px; }
.stats li + li { border-left: 1px solid var(--line); }
.stats strong {
  display: block;
  color: var(--ink);
  font-size: 48px;
  line-height: 1;
  letter-spacing: -0.05em;
  font-weight: 600;
}
.stats span { display: block; margin-top: 14px; font-size: 16px; font-weight: 650; }
.stats p { color: var(--muted); margin-top: 4px; font-size: 14px; }

.quote { display: flex; flex-direction: column; }
.quote blockquote { margin: 0; font-size: 16px; flex: 1; }
.quote figcaption { display: flex; flex-direction: column; margin-top: 24px; padding-top: 16px; border-top: 1px solid var(--line); }
.quote figcaption span { color: var(--faint); font-size: 13px; }
.logo-wall { margin-top: 36px; text-align: center; }
.logo-wall p { color: var(--faint); font-size: 13px; }
.marquee { margin-top: 14px; }
.marquee-track { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px 22px; }
.marquee-track span { color: #9aa3ad; font-size: 15px; font-weight: 650; letter-spacing: 0.04em; }

.plan { display: flex; flex-direction: column; }
.plan ul { margin: 18px 0 22px; padding: 0; list-style: none; flex: 1; }
.plan li { padding: 11px 0; border-top: 1px solid var(--line); color: var(--ink); }
.plan .btn { width: 100%; }
.plan-featured { background: #171b22; color: #fff; position: relative; }
.plan-featured > p, .plan-featured li { color: #c5ced8; }
.plan-featured li { border-top-color: rgba(255, 255, 255, 0.1); }
.plan-featured .btn-primary { background: #fff; color: var(--ink); }
.plan-featured .btn-primary:hover { background: #eef3f8; }
.badge {
  position: absolute;
  top: 18px;
  right: 18px;
  color: #d5e4fb;
  font-size: 12px;
  font-weight: 650;
}

.cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: 40px 42px;
  border-radius: 28px;
  background: var(--paper);
  box-shadow: 0 1px 0 rgba(22, 24, 29, 0.04);
}
.cta p { max-width: 520px; color: var(--muted); margin-top: 10px; }

.site-footer { margin-top: 12px; padding: 48px 0 24px; background: #171b22; color: #d5dbe3; }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 32px; }
.site-footer .brand { color: #fff; }
.site-footer p { color: #9aa3ae; margin-top: 14px; max-width: 300px; font-size: 14px; }
.site-footer h3 { margin: 0 0 12px; font-size: 13px; color: #fff; letter-spacing: 0; font-weight: 650; }
.site-footer a, .site-footer button {
  display: block;
  width: fit-content;
  margin: 0 0 8px;
  padding: 0;
  border: 0;
  background: none;
  color: #b7c0cb;
  text-align: left;
  font-size: 14px;
}
.site-footer a:hover, .site-footer button:hover { color: #fff; }
.quiet { font-size: 13px; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 32px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  color: #8b95a3;
  font-size: 13px;
}

.modal {
  width: min(440px, calc(100% - 32px));
  border: 0;
  border-radius: 22px;
  padding: 22px;
  box-shadow: 0 30px 80px rgba(22, 24, 29, 0.22);
}
.modal::backdrop { background: rgba(23, 27, 34, 0.46); backdrop-filter: blur(8px); }
.modal-head { display: flex; justify-content: space-between; gap: 12px; align-items: flex-start; margin-bottom: 8px; }
.modal h2 { font-size: 26px; }
.icon-btn { width: 34px; height: 34px; border: 0; border-radius: 50%; background: var(--bg); font-size: 20px; line-height: 1; }
.modal label { display: grid; gap: 6px; margin-top: 12px; font-size: 13px; color: var(--muted); font-weight: 650; }
.modal input, .modal select {
  height: 44px;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  padding: 0 12px;
  background: #fff;
}
.modal input:focus, .modal select:focus { outline: 2px solid rgba(7, 91, 219, 0.28); border-color: var(--blue); }
.modal .btn { width: 100%; margin-top: 16px; }
.form-note { margin-top: 12px; color: var(--muted); font-size: 14px; }
.modal-success p:last-of-type { color: var(--muted); margin: 8px 0 0; }

@media (max-width: 980px) {
  .card-grid, .stats, .footer-grid { grid-template-columns: 1fr 1fr; }
  .stats li:nth-child(odd) { border-left: 0; }
  .stats li:nth-child(n + 3) { border-top: 1px solid var(--line); }
  .release, .split, .split-reverse { grid-template-columns: 1fr; gap: 24px; }
  .split-reverse .copy { order: -1; }
  .quote-grid, .plan-grid { grid-template-columns: 1fr; }
  .site-nav {
    display: none;
    position: absolute;
    top: calc(var(--header) + 8px);
    left: 16px;
    right: 16px;
    padding: 8px;
    background: #fff;
    border-radius: 16px;
    box-shadow: var(--shadow);
    flex-direction: column;
    gap: 0;
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 12px 10px; }
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .nav-toggle-lines, .nav-toggle-lines::before, .nav-toggle-lines::after {
    display: block;
    width: 18px;
    height: 1.5px;
    background: var(--ink);
    position: relative;
  }
  .nav-toggle-lines::before, .nav-toggle-lines::after { content: ""; position: absolute; left: 0; }
  .nav-toggle-lines::before { top: -6px; }
  .nav-toggle-lines::after { top: 6px; }
  .nav-actions .btn-ghost { display: none; }
  .cta { flex-direction: column; align-items: flex-start; padding: 28px 24px; }
  .release { padding: 24px; }
}

@media (max-width: 720px) {
  .container, .nav-wrap { width: min(var(--max), calc(100% - 32px)); }
  .section { padding: 12px 0 64px; }
  .card-grid, .stats, .footer-grid, .metric-grid { grid-template-columns: 1fr; }
  .stats li + li, .stats li:nth-child(n + 3) { border-left: 0; border-top: 1px solid var(--line); }
  .device-body { grid-template-columns: 1fr; }
  .side { display: none; }
  .hero { padding-top: 48px; }
  .hero-actions, .release-file .btn { width: 100%; }
  .hero-actions { flex-direction: column; }
  .footer-bottom { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}