:root {
  --bg: #f4f8ff;
  --surface: #ffffff;
  --surface-2: #ecf4ff;
  --ink: #21324f;
  --muted: #68758f;
  --line: #dbe7f7;
  --brand: #165dff;
  --brand-dark: #0c3fb5;
  --accent: #28c4a8;
  --shadow: 0 18px 50px rgba(22, 93, 255, .12);
  --radius: 24px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(1180px, calc(100% - 36px)); margin: 0 auto; }

.topbar {
  background: #0d1f3d;
  color: rgba(255,255,255,.86);
  font-size: 14px;
}
.topbar__inner {
  min-height: 42px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.topbar__links { display: flex; gap: 16px; flex-wrap: wrap; }
.topbar__links a { color: #fff; opacity: .92; }
.topbar__links a:hover { opacity: 1; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}
.nav {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  color: var(--ink);
  white-space: nowrap;
}
.brand__mark {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--brand), #58a6ff);
  color: #fff;
  display: grid;
  place-items: center;
  box-shadow: 0 10px 24px rgba(22,93,255,.25);
}
.brand__text { font-size: 18px; }
.nav-menu {
  display: flex;
  align-items: center;
  gap: 24px;
  color: #344461;
  font-weight: 650;
}
.nav-menu a:hover { color: var(--brand); }
.nav-toggle { display: none; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  background: var(--brand);
  color: #fff;
  font-weight: 750;
  border: 1px solid var(--brand);
  box-shadow: 0 12px 30px rgba(22,93,255,.22);
  transition: transform .18s, box-shadow .18s, background .18s;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 16px 36px rgba(22,93,255,.28); }
.btn--small { min-height: 40px; padding: 0 16px; font-size: 14px; }
.btn--ghost { background: #fff; color: var(--brand); box-shadow: none; }
.btn--full { width: 100%; }

.hero {
  position: relative;
  overflow: hidden;
  padding: 90px 0 72px;
  background:
    radial-gradient(circle at 80% 20%, rgba(22,93,255,.16), transparent 34%),
    radial-gradient(circle at 16% 16%, rgba(40,196,168,.15), transparent 32%),
    linear-gradient(180deg, #f8fbff, #edf5ff 74%, var(--bg));
}
.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, .95fr);
  gap: 54px;
  align-items: center;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  color: var(--brand);
  font-weight: 850;
  letter-spacing: .08em;
  text-transform: uppercase;
  font-size: 13px;
}
.eyebrow::before {
  content: "";
  width: 28px;
  height: 3px;
  border-radius: 99px;
  background: var(--accent);
}
h1, h2, h3, h4 { line-height: 1.22; margin: 0; }
h1 { font-size: clamp(38px, 6vw, 68px); letter-spacing: -.04em; }
h2 { font-size: clamp(30px, 4vw, 48px); letter-spacing: -.03em; }
h3 { font-size: 22px; }
.lead { margin: 22px 0 0; font-size: 18px; color: var(--muted); max-width: 680px; }
.hero__actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 34px; }
.hero__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 34px;
}
.hero__stats div, .stat-card {
  padding: 18px;
  background: rgba(255,255,255,.82);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
}
.hero__stats strong, .stat-card strong { display: block; font-size: 28px; color: var(--brand); line-height: 1.1; }
.hero__stats span, .stat-card span { color: var(--muted); font-size: 14px; }

.hero__visual { position: relative; min-height: 460px; }
.dashboard-card {
  background: rgba(255,255,255,.9);
  border: 1px solid var(--line);
  border-radius: 30px;
  box-shadow: 0 28px 70px rgba(23,56,116,.16);
}
.dashboard-card--main { padding: 28px; max-width: 430px; margin: 0 auto; }
.window-bar { display: flex; gap: 7px; margin-bottom: 22px; }
.window-bar span { width: 11px; height: 11px; border-radius: 50%; background: #d8e4f3; }
.chart {
  height: 160px;
  margin: 28px 0;
  padding: 18px;
  border-radius: 22px;
  background: linear-gradient(180deg, #f4f8ff, #fff);
  display: flex;
  align-items: flex-end;
  gap: 13px;
}
.chart i {
  flex: 1;
  min-width: 38px;
  border-radius: 14px 14px 4px 4px;
  background: linear-gradient(180deg, var(--brand), #8ec5ff);
}
.metric-row { display: flex; justify-content: space-between; padding: 14px 0; border-top: 1px solid var(--line); color: var(--muted); }
.metric-row b { color: var(--accent); }
.float-card {
  position: absolute;
  padding: 14px 18px;
  border-radius: 18px;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  font-weight: 780;
}
.float-card--one { left: 0; top: 78px; }
.float-card--two { right: 16px; top: 186px; }
.float-card--three { left: 50px; bottom: 62px; }

.channel-strip {
  padding: 24px 0;
  background: #0d1f3d;
  color: #fff;
}
.channel-strip .container { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.channel-strip p { margin: 0; font-weight: 750; white-space: nowrap; }
.channels { display: flex; gap: 10px; flex-wrap: wrap; justify-content: flex-end; }
.channels span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 14px;
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 999px;
  background: rgba(255,255,255,.08);
}

.section, .split-section { padding: 88px 0; }
.surface { background: #fff; }
.section-head { text-align: center; max-width: 780px; margin: 0 auto 44px; }
.section-head p:not(.eyebrow) { color: var(--muted); margin: 14px 0 0; }
.section-head--row { text-align: left; max-width: none; display: flex; justify-content: space-between; align-items: end; gap: 20px; }

.product-grid, .feature-grid, .article-grid, .sms-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.product-card, .feature, .article-grid article, .sms-card, .contact-card, .detail-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}
.product-card span, .feature b, .sms-card b {
  display: inline-flex;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  color: #fff;
  background: var(--brand);
  margin-bottom: 18px;
}
.product-card p, .feature p, .article-grid p, .sms-card p, .detail-panel p { color: var(--muted); margin: 12px 0 0; }
.article-grid { grid-template-columns: repeat(3, 1fr); }
.article-grid time { color: var(--brand); font-weight: 800; }

.split { display: grid; grid-template-columns: .92fr 1.08fr; gap: 54px; align-items: center; }
.split--alt { grid-template-columns: 1fr 1fr; }
.split__content p { color: var(--muted); }
.check-list { list-style: none; padding: 0; margin: 24px 0; display: grid; gap: 12px; }
.check-list li {
  position: relative;
  padding-left: 34px;
  color: #3a4964;
}
.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(40,196,168,.14);
  color: var(--accent);
  display: grid;
  place-items: center;
  font-weight: 900;
  line-height: 1;
}
.text-link { color: var(--brand); font-weight: 850; }
.solution-list { display: grid; gap: 14px; margin-top: 24px; }
.solution-list div { background: var(--surface-2); border-radius: 20px; padding: 20px; border: 1px solid var(--line); }
.solution-list p { margin: 8px 0 0; }

.phone-mock {
  max-width: 330px;
  margin: 0 auto;
  padding: 16px;
  border-radius: 42px;
  background: #101a2e;
  box-shadow: 0 30px 80px rgba(16,26,46,.25);
}
.phone-screen {
  min-height: 520px;
  border-radius: 32px;
  background: linear-gradient(180deg, #ffffff, #eaf3ff);
  padding: 42px 24px;
  text-align: center;
}
.avatar {
  width: 72px;
  height: 72px;
  border-radius: 24px;
  margin: 0 auto 18px;
  background: linear-gradient(135deg, var(--brand), var(--accent));
}
.mini-feed { height: 62px; border-radius: 18px; background: #dbeaff; margin-top: 18px; }
.mini-feed.small { width: 76%; margin-left: auto; margin-right: auto; }
.globe-card {
  min-height: 430px;
  border-radius: 34px;
  background: radial-gradient(circle, #d9ebff 0 36%, #fff 37% 100%);
  position: relative;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.globe {
  position: absolute;
  inset: 88px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #fff, #b5d8ff 42%, #165dff 100%);
  box-shadow: inset -20px -30px 60px rgba(10,43,116,.18);
}
.pin { position: absolute; padding: 8px 12px; border-radius: 999px; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); font-weight: 800; }
.pin-a { top: 90px; left: 78px; }
.pin-b { right: 74px; bottom: 110px; }
.pin-c { top: 160px; right: 82px; }

.cta { padding: 82px 0; background: linear-gradient(135deg, #102344, #165dff); color: #fff; }
.cta .eyebrow { color: #bde9ff; }

.cta__inner { display: grid; grid-template-columns: 1fr 370px; gap: 34px; align-items: center; }
.contact-card { color: var(--ink); }
.contact-card p { margin: 10px 0; }
.contact-card a:not(.btn) { color: var(--brand); }

.footer { padding: 58px 0 24px; background: #08162b; color: rgba(255,255,255,.75); }
.footer__grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 28px; }
.footer h4 { color: #fff; margin-bottom: 12px; }
.footer a { display: block; margin: 8px 0; }
.footer a:hover { color: #fff; }
.brand--footer { color: #fff; }
.copyright { margin-top: 34px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.12); font-size: 14px; }

.contact-float { position: fixed; right: 24px; bottom: 88px; z-index: 100; }
.contact-toggle {
  width: 58px; height: 58px; border: none; border-radius: 50%; background: var(--brand); color: #fff; font-size: 26px; cursor: pointer; box-shadow: 0 8px 24px rgba(0,0,0,.18); transition: .25s;
}
.contact-toggle:hover { transform: scale(1.06); }
.contact-panel {
  position: absolute; right: 0; bottom: 74px; width: 280px; background: #f6f9ff; border: 1px solid var(--line); border-radius: 18px; box-shadow: 0 12px 32px rgba(0,0,0,.18); overflow: hidden; display: none;
}
.contact-panel.show { display: block; animation: fadeUp .25s ease; }
.contact-header { background: var(--brand); color: #fff; padding: 18px; }
.contact-header h3 { margin: 0 0 4px; font-size: 24px; }
.contact-header p { margin: 0; font-size: 15px; }
.contact-item { margin: 14px; padding: 14px; border-radius: 18px; background: #e8f2ff; display: flex; align-items: center; gap: 12px; color: #2e3a59; transition: .2s; }
.contact-item:hover { transform: translateY(-2px); }
.contact-item .icon { width: 38px; height: 38px; border-radius: 50%; display: grid; place-items: center; font-size: 20px; background: #fff; }
.contact-item .title { font-size: 18px; font-weight: 800; line-height: 1.2; }
.contact-item .desc { margin-top: 2px; font-size: 14px; color: #4b5b7c; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.page-hero {
  padding: 78px 0 60px;
  background: linear-gradient(180deg, #f8fbff, #eaf3ff);
}
.page-hero__grid { display: grid; grid-template-columns: minmax(0, 1.05fr) 390px; gap: 46px; align-items: center; }
.detail-panel { background: #fff; }
.detail-panel ul { margin: 18px 0 0; padding-left: 20px; color: var(--muted); }
.sms-grid { grid-template-columns: repeat(3, 1fr); }
.notice {
  margin-top: 24px;
  padding: 18px 20px;
  border-radius: 20px;
  background: #fff8e7;
  color: #72500c;
  border: 1px solid #f1dfb4;
}

@media (max-width: 960px) {
  .nav-menu {
    position: absolute;
    left: 18px;
    right: 18px;
    top: 74px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px;
    border-radius: 20px;
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
  }
  .nav-menu.show { display: flex; }
  .nav-menu a { padding: 12px 14px; }
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px; height: 42px;
    border: 1px solid var(--line);
    background: #fff;
    border-radius: 14px;
    font-size: 22px;
  }
  .nav > .btn--small { display: none; }
  .hero__grid, .split, .split--alt, .page-hero__grid, .cta__inner { grid-template-columns: 1fr; }
  .hero__visual { min-height: 360px; }
  .product-grid, .feature-grid, .article-grid, .sms-grid, .footer__grid { grid-template-columns: repeat(2, 1fr); }
  .channel-strip .container { align-items: flex-start; flex-direction: column; }
  .channels { justify-content: flex-start; }
}

@media (max-width: 640px) {
  .container { width: min(100% - 28px, 1180px); }
  .topbar__inner { align-items: flex-start; flex-direction: column; padding: 10px 0; }
  .hero, .section, .split-section, .page-hero { padding: 58px 0; }
  h1 { font-size: 38px; }
  h2 { font-size: 30px; }
  .hero__stats, .product-grid, .feature-grid, .article-grid, .sms-grid, .footer__grid { grid-template-columns: 1fr; }
  .hero__actions { flex-direction: column; }
  .btn { width: 100%; }
  .section-head--row { display: block; }
  .contact-float { right: 16px; bottom: 76px; }
  .contact-panel { width: 260px; }
  .float-card { display: none; }
  .dashboard-card--main { padding: 22px; }
}