:root {
  --ink: #14213d;
  --muted: #5c6680;
  --soft: #f7f3ff;
  --panel: rgba(255, 255, 255, 0.78);
  --blue: #6abdf8;
  --violet: #7c5df7;
  --mint: #45d7bd;
  --gold: #f4ba63;
  --line: rgba(72, 82, 122, 0.14);
  --shadow: 0 26px 70px rgba(84, 86, 151, 0.2);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at 16% 14%, rgba(106, 189, 248, 0.42), transparent 24rem),
    radial-gradient(circle at 82% 18%, rgba(124, 93, 247, 0.28), transparent 27rem),
    linear-gradient(180deg, #eef8ff 0%, #f8f0ff 44%, #f4fbff 100%);
  min-height: 100vh;
}

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

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

.shell {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(255, 255, 255, 0.52);
  background: rgba(245, 250, 255, 0.76);
  backdrop-filter: blur(22px);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 24px;
  letter-spacing: 0;
}

.brand img {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  box-shadow: 0 12px 26px rgba(69, 141, 219, 0.22);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  color: var(--muted);
  font-size: 15px;
}

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

.hero {
  position: relative;
  overflow: hidden;
  min-height: 92vh;
  padding: 84px 0 76px;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 90px auto auto 50%;
  width: 620px;
  height: 620px;
  border-radius: 50%;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.86), rgba(255, 255, 255, 0)),
    conic-gradient(from 145deg, rgba(106, 189, 248, 0.32), rgba(124, 93, 247, 0.22), rgba(69, 215, 189, 0.28), rgba(106, 189, 248, 0.32));
  filter: blur(2px);
  transform: translateX(-4%);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 470px);
  gap: 72px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 22px;
  padding: 8px 14px;
  border: 1px solid rgba(124, 93, 247, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.68);
  color: #496075;
  font-size: 14px;
  font-weight: 700;
}

.eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 7px rgba(69, 215, 189, 0.15);
}

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

h1,
h2,
h3 {
  font-weight: 800;
}

h1 {
  max-width: 760px;
  font-size: clamp(56px, 8vw, 112px);
  line-height: 0.96;
  letter-spacing: 0;
}

.gradient-text {
  background: linear-gradient(125deg, #327edb 4%, #7d56f0 46%, #36bda8 92%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-subtitle {
  margin-top: 18px;
  color: var(--ink);
  font-size: 21px;
  font-weight: 800;
  line-height: 1.7;
}

.hero-copy {
  max-width: 600px;
  margin-top: 12px;
  color: #43516e;
  font-size: 21px;
  line-height: 1.8;
}

.download-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 38px;
}

.download-btn {
  min-width: 174px;
  height: 56px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 1px solid rgba(20, 33, 61, 0.08);
  border-radius: 16px;
  background: #111a31;
  color: #fff;
  font-size: 17px;
  font-weight: 800;
  box-shadow: 0 18px 30px rgba(72, 65, 157, 0.24);
  text-decoration: none;
  cursor: pointer;
}

.download-btn.secondary {
  background: rgba(255, 255, 255, 0.86);
  color: var(--ink);
}

.download-note {
  width: 100%;
  color: #71809a;
  font-size: 14px;
}

.phone-stage {
  position: relative;
  min-height: 650px;
}

.phone-card {
  position: absolute;
  overflow: hidden;
  width: min(380px, 84vw);
  border: 12px solid rgba(255, 255, 255, 0.86);
  border-radius: 42px;
  background: #fff;
  box-shadow: var(--shadow);
}

.phone-card.primary {
  right: 0;
  top: 0;
  z-index: 2;
}

.phone-card.secondary {
  left: 0;
  bottom: 0;
  width: min(286px, 58vw);
  opacity: 0.94;
  transform: rotate(-5deg);
}

.floating-logo {
  position: absolute;
  left: 34px;
  top: 34px;
  z-index: 3;
  width: 104px;
  height: 104px;
  border: 8px solid rgba(255, 255, 255, 0.72);
  border-radius: 28px;
  box-shadow: 0 22px 50px rgba(47, 111, 184, 0.28);
}

section {
  padding: 92px 0;
}

.section-head {
  max-width: 680px;
  margin-bottom: 42px;
}

.section-kicker {
  margin-bottom: 12px;
  color: var(--violet);
  font-weight: 800;
  font-size: 15px;
}

h2 {
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.12;
  letter-spacing: 0;
}

.section-copy {
  margin-top: 18px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.75;
}

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

.feature-card,
.quote-card {
  border: 1px solid rgba(255, 255, 255, 0.68);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 18px 48px rgba(67, 80, 128, 0.1);
  backdrop-filter: blur(16px);
}

.feature-card {
  min-height: 210px;
  padding: 28px;
}

.feature-icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  margin-bottom: 24px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(106, 189, 248, 0.26), rgba(124, 93, 247, 0.18));
  color: #356ed9;
  font-size: 24px;
  font-weight: 900;
}

.feature-card h3 {
  margin-bottom: 12px;
  font-size: 22px;
}

.feature-card p {
  color: var(--muted);
  line-height: 1.7;
}

.showcase {
  display: grid;
  grid-template-columns: minmax(300px, 0.9fr) minmax(0, 1fr);
  gap: 70px;
  align-items: center;
}

.showcase + .showcase {
  margin-top: 94px;
}

.showcase:nth-child(even) {
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.9fr);
}

.showcase:nth-child(even) .showcase-media {
  order: 2;
}

.showcase-media {
  display: flex;
  justify-content: center;
}

.screen {
  overflow: hidden;
  width: min(370px, 86vw);
  border: 12px solid rgba(255, 255, 255, 0.78);
  border-radius: 44px;
  background: rgba(255, 255, 255, 0.66);
  box-shadow: var(--shadow);
}

.showcase h3 {
  font-size: clamp(32px, 4vw, 54px);
  line-height: 1.14;
  margin-bottom: 18px;
}

.showcase p {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.85;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.tag {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
  color: #52637b;
  font-size: 14px;
  font-weight: 700;
}

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

.quote-card {
  padding: 28px;
}

.quote-card p {
  color: #34425d;
  line-height: 1.75;
}

.quote-card strong {
  display: block;
  margin-top: 22px;
  color: var(--ink);
}

.footer {
  padding: 42px 0 48px;
  border-top: 1px solid var(--line);
  color: #6a768e;
  font-size: 14px;
  line-height: 2;
  background: rgba(255, 255, 255, 0.38);
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: 32px;
}

.footer .brand {
  margin-bottom: 14px;
}

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

  .hero {
    padding-top: 58px;
  }

  .hero-grid,
  .showcase,
  .showcase:nth-child(even) {
    grid-template-columns: 1fr;
    gap: 42px;
  }

  .showcase:nth-child(even) .showcase-media {
    order: 0;
  }

  .phone-stage {
    min-height: 570px;
  }

  .features,
  .quotes {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    display: block;
  }
}

@media (max-width: 560px) {
  .shell {
    width: min(100% - 28px, 1120px);
  }

  .nav-inner {
    height: 66px;
  }

  .hero {
    min-height: auto;
    padding-bottom: 52px;
  }

  h1 {
    font-size: 58px;
  }

  .hero-copy,
  .hero-subtitle,
  .section-copy,
  .showcase p {
    font-size: 16px;
  }

  .download-btn {
    width: 100%;
  }

  .phone-stage {
    min-height: 500px;
  }

  .phone-card.primary {
    right: 50%;
    transform: translateX(50%);
  }

  .phone-card.secondary {
    display: none;
  }

  .floating-logo {
    left: 10px;
    top: 18px;
    width: 82px;
    height: 82px;
    border-radius: 22px;
  }

  section {
    padding: 68px 0;
  }

  .feature-card,
  .quote-card {
    padding: 22px;
  }
}