* {
  box-sizing: border-box;
}

:root {
  --primary: rgb(70,139,223);
  --primary-dark: #1f5fae;
  --primary-soft: #edf6ff;
  --ink: #14243b;
  --muted: #5f6f85;
  --line: rgba(70,139,223,0.16);
  --card: rgba(255,255,255,0.92);
  --shadow: 0 18px 45px rgba(36, 84, 142, 0.11);
  --radius: 22px;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 0%, rgba(70,139,223,0.18), transparent 36%),
    linear-gradient(180deg, #f5fbff 0%, #ffffff 48%, #f7fbff 100%);
  line-height: 1.75;
  overflow-x: hidden;
}

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

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

.container {
  width: min(100% - 32px, 1160px);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255,255,255,0.86);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #10243d;
}

.logo,
.footer-logo {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  object-fit: cover;
  box-shadow: 0 10px 26px rgba(70,139,223,0.2);
}

.nav-toggle {
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  background: #ffffff;
  border-radius: 14px;
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}

.nav-toggle span {
  width: 18px;
  height: 2px;
  background: var(--ink);
  border-radius: 99px;
}

.site-nav {
  position: absolute;
  left: 16px;
  right: 16px;
  top: 76px;
  display: none;
  flex-direction: column;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255,255,255,0.98);
  box-shadow: var(--shadow);
}

.site-nav.is-open {
  display: flex;
}

.site-nav a {
  padding: 12px 14px;
  border-radius: 14px;
  color: #24415f;
  font-size: 15px;
  font-weight: 600;
}

.site-nav a.active,
.site-nav a:hover {
  color: var(--primary-dark);
  background: var(--primary-soft);
}

.hero {
  padding: 50px 0 34px;
}

.hero-grid {
  display: grid;
  gap: 28px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary-dark);
  background: rgba(70,139,223,0.11);
  border: 1px solid rgba(70,139,223,0.18);
  padding: 7px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.2;
  letter-spacing: -0.03em;
}

h1 {
  margin-top: 18px;
  font-size: clamp(32px, 8vw, 62px);
  color: #10243d;
}

h2 {
  font-size: clamp(24px, 5vw, 38px);
  color: #132a45;
}

h3 {
  font-size: 19px;
  color: #16304e;
}

.lead {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  margin-top: 28px;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 24px;
  color: #ffffff;
  background: var(--primary);
  border-radius: 999px;
  box-shadow: 0 14px 32px rgba(70,139,223,0.26);
  font-weight: 800;
  letter-spacing: 0.02em;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.download-btn:hover {
  transform: translateY(-2px);
  background: var(--primary-dark);
  box-shadow: 0 18px 40px rgba(70,139,223,0.34);
}

.hero-note {
  color: var(--muted);
  font-size: 14px;
}

.hero-visual {
  position: relative;
  padding: 20px;
  border-radius: 30px;
  background: linear-gradient(135deg, rgba(70,139,223,0.14), rgba(255,255,255,0.95));
  border: 1px solid rgba(70,139,223,0.16);
  box-shadow: var(--shadow);
}

.hero-visual::after {
  content: "";
  position: absolute;
  inset: 12% -8% auto auto;
  width: 150px;
  height: 150px;
  background: rgba(70,139,223,0.14);
  filter: blur(25px);
  border-radius: 50%;
}

.app-shot {
  position: relative;
  z-index: 1;
  width: min(100%, 440px);
  margin: 0 auto;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-radius: 999px;
  background: #ffffff;
  border: 1px solid var(--line);
  color: #2b4c6e;
  font-size: 13px;
  font-weight: 700;
}

.section {
  padding: 42px 0;
}

.section-head {
  max-width: 760px;
  margin-bottom: 24px;
}

.section-head p,
.card p,
.text-block p,
.faq-item p,
.step-card p,
.info-panel p,
.article-content p {
  color: var(--muted);
}

.grid {
  display: grid;
  gap: 18px;
}

.feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.card,
.step-card,
.info-panel,
.faq-item,
.text-block {
  background: var(--card);
  border: 1px solid rgba(70,139,223,0.13);
  border-radius: var(--radius);
  box-shadow: 0 12px 34px rgba(36, 84, 142, 0.08);
}

.card,
.step-card,
.info-panel,
.text-block {
  padding: 22px;
}

.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  margin-bottom: 14px;
  border-radius: 14px;
  background: rgba(70,139,223,0.12);
  color: var(--primary-dark);
  font-weight: 900;
}

.split {
  display: grid;
  gap: 18px;
  align-items: start;
}

.metrics {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.metric {
  padding: 20px;
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(70,139,223,0.12), rgba(255,255,255,0.88));
  border: 1px solid rgba(70,139,223,0.14);
}

.metric strong {
  display: block;
  color: var(--primary-dark);
  font-size: 28px;
  line-height: 1.1;
}

.metric span {
  color: var(--muted);
  font-size: 14px;
}

.page-hero {
  padding: 44px 0 26px;
}

.page-hero .lead {
  max-width: 780px;
}

.article-content {
  display: grid;
  gap: 18px;
}

.article-content .download-btn {
  justify-self: start;
  margin-top: 4px;
}

.tip-list {
  margin: 12px 0 0;
  padding-left: 20px;
  color: var(--muted);
}

.tip-list li + li {
  margin-top: 8px;
}

.faq-list {
  display: grid;
  gap: 14px;
}

.faq-item {
  padding: 20px;
}

.faq-item h3 {
  margin-bottom: 8px;
}

.steps {
  display: grid;
  gap: 14px;
  counter-reset: step;
}

.step-card {
  position: relative;
  padding-left: 66px;
}

.step-card::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 20px;
  top: 22px;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  color: #ffffff;
  background: var(--primary);
  font-weight: 900;
}

.cta-panel {
  padding: 26px;
  border-radius: 28px;
  background: linear-gradient(135deg, rgba(70,139,223,0.13), rgba(255,255,255,0.96));
  border: 1px solid rgba(70,139,223,0.16);
  box-shadow: var(--shadow);
}

.site-footer {
  margin-top: 42px;
  padding: 40px 0 22px;
  background: #10243d;
  color: rgba(255,255,255,0.82);
}

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

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #ffffff;
  font-size: 18px;
}

.site-footer h3 {
  color: #ffffff;
  font-size: 16px;
  margin-bottom: 10px;
}

.site-footer a {
  display: block;
  color: rgba(255,255,255,0.72);
  padding: 5px 0;
}

.site-footer a:hover {
  color: #ffffff;
}

.footer-bottom {
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid rgba(255,255,255,0.12);
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: rgba(255,255,255,0.58);
  font-size: 13px;
}

@media (min-width: 640px) {
  .container {
    width: min(100% - 48px, 1160px);
  }

  .feature-grid,
  .metrics {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1.4fr repeat(3, 1fr);
  }
}

@media (min-width: 900px) {
  .nav-toggle {
    display: none;
  }

  .site-nav {
    position: static;
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 4px;
    padding: 0;
    border: 0;
    border-radius: 0;
    box-shadow: none;
    background: transparent;
  }

  .site-nav a {
    padding: 10px 12px;
  }

  .hero {
    padding: 78px 0 56px;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
    gap: 48px;
  }

  .section {
    padding: 62px 0;
  }

  .feature-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .split {
    grid-template-columns: 1fr 0.86fr;
    gap: 24px;
  }

  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

@media (min-width: 1100px) {
  .site-nav a {
    padding: 10px 15px;
  }

  .card,
  .step-card,
  .info-panel,
  .text-block,
  .faq-item {
    padding: 26px;
  }
}