:root {
  --brand-blue: #0056a8;
  --brand-sky: #00aeea;
  --brand-cyan: #30d5c8;
  --ink: #10223c;
  --muted: #64748b;
  --line: rgba(0, 86, 168, 0.12);
  --bg: #f5fbff;
  --card: rgba(255, 255, 255, 0.86);
  --shadow: 0 24px 70px rgba(0, 64, 128, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background:
    radial-gradient(circle at 8% 8%, rgba(48, 213, 200, 0.18), transparent 28%),
    radial-gradient(circle at 88% 10%, rgba(0, 174, 234, 0.2), transparent 30%),
    linear-gradient(180deg, #f7fdff 0%, #eef8ff 42%, #ffffff 100%);
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1180px, calc(100% - 40px));
  height: 72px;
  margin: 0 auto;
  padding: 10px 0;
  backdrop-filter: blur(18px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  color: var(--brand-blue);
}

.brand-mark {
  width: 36px;
  height: 36px;
}

.brand-logo {
  width: 112px;
  height: auto;
}

.brand span {
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--brand-blue);
  font-size: 13px;
  background: rgba(255, 255, 255, 0.72);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  color: #35506d;
  font-size: 15px;
  font-weight: 650;
}

.nav-links a {
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: var(--brand-blue);
}

.section {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(360px, 0.98fr);
  gap: 44px;
  align-items: center;
  min-height: calc(100vh - 72px);
  padding: 58px 0 82px;
}

.hero::before,
.hero::after {
  position: absolute;
  content: "";
  pointer-events: none;
  border-radius: 999px;
}

.hero::before {
  right: 40px;
  top: 96px;
  width: 260px;
  height: 260px;
  border: 36px solid rgba(0, 174, 234, 0.1);
}

.hero::after {
  left: -70px;
  bottom: 72px;
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, rgba(48, 213, 200, 0.16), transparent 68%);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--brand-blue);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 680px;
  margin-bottom: 22px;
  font-size: clamp(42px, 6vw, 78px);
  line-height: 1.04;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.12;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
  line-height: 1.28;
}

.hero-desc,
.split-panel p,
.download-copy p {
  max-width: 620px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.86;
}

.hero-actions,
.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.btn,
.store-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 24px;
  border-radius: 12px;
  font-weight: 800;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.btn:hover,
.store-btn:hover {
  transform: translateY(-2px);
}

.primary,
.store-btn {
  color: #fff;
  background: linear-gradient(135deg, var(--brand-blue), var(--brand-sky));
  box-shadow: 0 16px 32px rgba(0, 86, 168, 0.24);
}

.secondary {
  color: var(--brand-blue);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.76);
}

.trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.trust-row span {
  padding: 9px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: #2d5d8c;
  font-size: 14px;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.74);
}

.hero-visual {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 660px;
}

.phone-frame {
  position: relative;
  overflow: hidden;
  width: min(332px, 82vw);
  aspect-ratio: 853 / 1844;
  border: 10px solid #10243c;
  border-radius: 42px;
  background: #fff;
  box-shadow: var(--shadow);
}

.phone-frame::before {
  position: absolute;
  top: 10px;
  left: 50%;
  z-index: 2;
  width: 88px;
  height: 24px;
  content: "";
  transform: translateX(-50%);
  border-radius: 999px;
  background: #10243c;
}

.phone-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.main-phone {
  transform: rotate(2deg);
}

.float-card {
  position: absolute;
  width: 232px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 18px 40px rgba(0, 64, 128, 0.12);
  backdrop-filter: blur(16px);
}

.float-card strong {
  display: block;
  margin-bottom: 6px;
  color: var(--brand-blue);
}

.float-card span {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.float-card-top {
  top: 126px;
  right: 0;
}

.float-card-bottom {
  left: 6px;
  bottom: 124px;
}

.feature-strip,
.workflow,
.screens,
.download,
.split-panel {
  padding: 86px 0;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.feature-card,
.steps article,
.notice-card,
.qr-card,
.screen-card {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--card);
  box-shadow: 0 20px 48px rgba(0, 64, 128, 0.08);
}

.feature-card {
  min-height: 222px;
  padding: 26px;
}

.feature-card p,
.steps p,
.check-list,
.qr-card small,
.site-footer span {
  color: var(--muted);
  line-height: 1.72;
}

.icon-badge,
.steps span {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-bottom: 18px;
  border-radius: 14px;
  color: #fff;
  font-weight: 900;
  background: linear-gradient(135deg, var(--brand-blue), var(--brand-cyan));
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.steps article {
  padding: 24px;
}

.steps span {
  width: 50px;
  color: var(--brand-blue);
  background: rgba(0, 174, 234, 0.12);
}

.split-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.76fr);
  gap: 34px;
  align-items: center;
}

.check-list {
  display: grid;
  gap: 12px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 28px;
}

.check-list li::before {
  position: absolute;
  left: 0;
  top: 4px;
  width: 16px;
  height: 16px;
  content: "";
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-sky), var(--brand-cyan));
}

.notice-card {
  position: relative;
  min-height: 260px;
  padding: 34px;
  background:
    radial-gradient(circle at 88% 16%, rgba(48, 213, 200, 0.22), transparent 32%),
    linear-gradient(150deg, #ffffff, #edf9ff);
}

.notice-dot {
  display: block;
  width: 58px;
  height: 58px;
  margin-bottom: 28px;
  border-radius: 20px;
  background:
    radial-gradient(circle at 30% 28%, #fff 0 10%, transparent 11%),
    linear-gradient(135deg, var(--brand-blue), var(--brand-sky));
}

.notice-card strong {
  display: block;
  margin-bottom: 12px;
  font-size: 26px;
}

.notice-card a {
  display: inline-flex;
  margin-top: 18px;
  color: var(--brand-blue);
  font-weight: 900;
}

.screen-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  align-items: end;
}

.screen-card {
  margin: 0;
  padding: 12px 12px 18px;
  text-align: center;
}

.screen-card img {
  width: 100%;
  aspect-ratio: 853 / 1844;
  object-fit: cover;
  border-radius: 22px;
  box-shadow: 0 16px 28px rgba(16, 34, 60, 0.13);
}

.screen-card figcaption {
  margin-top: 14px;
  color: var(--brand-blue);
  font-weight: 900;
}

.featured {
  transform: translateY(-22px);
}

.download {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 42px;
  align-items: center;
  margin-bottom: 50px;
  padding: 46px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background:
    radial-gradient(circle at 90% 20%, rgba(48, 213, 200, 0.18), transparent 30%),
    linear-gradient(135deg, #ffffff, #eff9ff);
  box-shadow: var(--shadow);
}

.qr-card {
  display: grid;
  justify-items: center;
  padding: 22px;
}

.qr-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  width: 166px;
  height: 166px;
  margin-bottom: 18px;
  padding: 16px;
  border: 10px solid #fff;
  border-radius: 18px;
  background: #eef9ff;
  box-shadow: inset 0 0 0 1px var(--line);
}

.qr-grid span {
  border-radius: 5px;
  background: linear-gradient(135deg, var(--brand-blue), var(--brand-sky));
}

.qr-grid span:nth-child(2n) {
  opacity: 0.28;
}

.qr-grid span:nth-child(5n) {
  opacity: 0.55;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 30px 20px 42px;
}

.site-footer img {
  width: 106px;
}

@media (max-width: 980px) {
  .nav-links {
    display: none;
  }

  .hero,
  .split-panel,
  .download {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 34px;
  }

  .hero-visual {
    min-height: 600px;
  }

  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .steps,
  .screen-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .download {
    padding: 34px;
  }
}

@media (max-width: 640px) {
  .site-header,
  .section {
    width: min(100% - 28px, 1180px);
  }

  .site-header {
    height: 64px;
  }

  .brand-logo {
    width: 96px;
  }

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

  h1 {
    font-size: 39px;
  }

  .hero-desc,
  .split-panel p,
  .download-copy p {
    font-size: 16px;
  }

  .hero-actions,
  .download-actions {
    flex-direction: column;
  }

  .btn,
  .store-btn {
    width: 100%;
  }

  .hero-visual {
    min-height: 520px;
  }

  .phone-frame {
    width: min(286px, 84vw);
    border-width: 8px;
    border-radius: 36px;
  }

  .float-card {
    width: 190px;
    padding: 13px 14px;
  }

  .float-card-top {
    top: 64px;
    right: -4px;
  }

  .float-card-bottom {
    left: -4px;
    bottom: 58px;
  }

  .feature-strip,
  .workflow,
  .screens,
  .download,
  .split-panel {
    padding: 58px 0;
  }

  .feature-grid,
  .steps,
  .screen-row {
    grid-template-columns: 1fr;
  }

  .screen-card,
  .featured {
    transform: none;
  }

  .screen-card img {
    width: min(270px, 100%);
    margin: 0 auto;
  }

  .download {
    margin-bottom: 24px;
    padding: 28px 20px;
  }

  .qr-card {
    width: min(100%, 260px);
    margin: 0 auto;
  }

  .site-footer {
    flex-direction: column;
    text-align: center;
  }
}