:root {
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", "Helvetica Neue", Arial, sans-serif;
  --font-display: var(--font-sans);
  --text-strong: #132238;
  --text-primary: #23364f;
  --text-secondary: #5f7087;
  --text-muted: #7c8ba1;
  --line-soft: rgba(19, 34, 56, 0.08);
  --line-strong: rgba(19, 34, 56, 0.16);
  --surface-white: #ffffff;
  --surface-0: #f7f9fc;
  --surface-1: #eef4fb;
  --surface-2: #e5eef9;
  --shadow-sm: 0 10px 24px rgba(26, 49, 84, 0.08);
  --shadow-md: 0 18px 46px rgba(26, 49, 84, 0.12);
  --shadow-lg: 0 28px 80px rgba(26, 49, 84, 0.18);
  --radius-xs: 12px;
  --radius-sm: 18px;
  --radius-md: 24px;
  --radius-lg: 32px;
  --container: min(1200px, calc(100vw - 48px));
  --ease: 220ms ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--text-primary);
  background: var(--surface-0);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

figure {
  margin: 0;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

::selection {
  background: rgba(34, 107, 228, 0.16);
}

.page-shell {
  overflow: clip;
}

.container {
  width: var(--container);
  margin: 0 auto;
}

.section {
  padding: 96px 0;
}

.section.compact {
  padding: 72px 0;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 36px;
  padding: 0 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(19, 34, 56, 0.08);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.section-head {
  display: grid;
  gap: 18px;
  margin-bottom: 40px;
}

.section-head.two-col {
  grid-template-columns: minmax(0, 1fr) minmax(320px, 420px);
  align-items: end;
}

.section-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: var(--text-strong);
}

.section-desc {
  margin: 0;
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.muted {
  color: var(--text-muted);
}

.grid {
  display: grid;
  gap: 24px;
}

.card {
  border-radius: var(--radius-md);
  background: var(--surface-white);
  border: 1px solid var(--line-soft);
  box-shadow: var(--shadow-sm);
}

.card.soft {
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(18px);
}

.kpi-list,
.inline-badges,
.feature-tags,
.meta-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.kpi-chip,
.inline-badge,
.tag,
.meta-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid var(--line-soft);
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.88);
  font-size: 14px;
  font-weight: 600;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 16px;
  font-weight: 700;
  transition: transform var(--ease), box-shadow var(--ease), background var(--ease), color var(--ease), border-color var(--ease);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, #1d71f2 0%, #0f56d9 100%);
  box-shadow: 0 16px 34px rgba(17, 92, 225, 0.28);
}

.btn-primary:hover {
  box-shadow: 0 22px 40px rgba(17, 92, 225, 0.34);
}

.btn-secondary {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.88);
  border-color: rgba(19, 34, 56, 0.12);
}

.btn-ghost {
  color: var(--text-secondary);
  background: transparent;
  border-color: rgba(19, 34, 56, 0.12);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 80;
  backdrop-filter: blur(16px);
  background: rgba(247, 249, 252, 0.82);
  border-bottom: 1px solid rgba(19, 34, 56, 0.08);
}

.topbar .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 76px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand-mark {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, #1d71f2 0%, #20b4c5 100%);
  box-shadow: 0 10px 24px rgba(17, 92, 225, 0.22);
}

.brand-copy {
  display: grid;
  gap: 2px;
}

.brand-title {
  font-size: 18px;
  font-weight: 800;
  color: var(--text-strong);
  letter-spacing: -0.02em;
}

.brand-subtitle {
  font-size: 13px;
  color: var(--text-muted);
}

.nav {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav a {
  position: relative;
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 600;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -12px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--ease);
}

.nav a:hover::after,
.nav a:focus-visible::after {
  transform: scaleX(1);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.menu-toggle {
  display: none;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  border: 1px solid rgba(19, 34, 56, 0.12);
  background: rgba(255, 255, 255, 0.88);
}

.menu-toggle span,
.menu-toggle::before,
.menu-toggle::after {
  content: "";
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  border-radius: 999px;
  background: var(--text-primary);
}

.phone-frame {
  position: relative;
  padding: 40px 14px 14px;
  border-radius: 34px;
  background: linear-gradient(160deg, #ffffff 0%, #eef5ff 100%);
  border: 1px solid rgba(19, 34, 56, 0.08);
  box-shadow: var(--shadow-md);
}

.phone-frame::before {
  content: "";
  position: absolute;
  top: 11px;
  left: 50%;
  width: 110px;
  height: 24px;
  border-radius: 999px;
  transform: translateX(-50%);
  background: rgba(19, 34, 56, 0.08);
}

.phone-frame img {
  width: 100%;
  border-radius: 24px;
}

.list-clean {
  margin: 0;
  padding: 0;
  list-style: none;
}

.icon-bullet {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 10px;
  background: rgba(16, 112, 255, 0.1);
  color: #1d71f2;
  font-size: 16px;
  font-weight: 900;
}

.divider {
  height: 1px;
  background: rgba(19, 34, 56, 0.08);
  margin: 20px 0;
}

.footer {
  padding: 36px 0 48px;
  color: var(--text-muted);
}

.footer .inner {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  padding-top: 24px;
  border-top: 1px solid rgba(19, 34, 56, 0.08);
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

@media (max-width: 1199px) {
  :root {
    --container: min(100vw - 40px, 1080px);
  }

  .section {
    padding: 82px 0;
  }

  .section.compact {
    padding: 64px 0;
  }

  .section-head.two-col {
    grid-template-columns: 1fr;
  }

  .nav {
    gap: 16px;
  }
}

@media (max-width: 959px) {
  :root {
    --container: calc(100vw - 32px);
  }

  .topbar .inner {
    min-height: 72px;
  }

  .nav {
    display: none;
  }

  .menu-toggle {
    display: inline-grid;
    place-items: center;
  }

  .topbar-actions .btn-secondary {
    display: none;
  }

  .section {
    padding: 72px 0;
  }

  .section-title {
    font-size: clamp(28px, 8vw, 40px);
  }

  .section-desc {
    font-size: 16px;
    line-height: 1.75;
  }
}

@media (max-width: 639px) {
  :root {
    --container: calc(100vw - 24px);
  }

  .section {
    padding: 60px 0;
  }

  .section.compact {
    padding: 48px 0;
  }

  .eyebrow {
    min-height: 34px;
    padding: 0 14px;
  }

  .btn {
    width: 100%;
  }

  .btn-row {
    display: grid;
    grid-template-columns: 1fr;
  }

  .brand-title {
    font-size: 17px;
  }

  .brand-subtitle {
    font-size: 12px;
  }
}