:root {
  --bg: #07111f;
  --bg-soft: rgba(10, 23, 42, 0.72);
  --panel: rgba(10, 21, 38, 0.68);
  --panel-border: rgba(124, 162, 255, 0.16);
  --panel-strong: rgba(255, 255, 255, 0.08);
  --text: #edf4ff;
  --text-soft: rgba(237, 244, 255, 0.72);
  --line: rgba(255, 255, 255, 0.08);
  --blue: #77a8ff;
  --cyan: #64d8ff;
  --violet: #8f7cff;
  --teal: #49f0cb;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.4);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 16px;
  --container: 1160px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(78, 130, 255, 0.14), transparent 30%),
    radial-gradient(circle at 85% 12%, rgba(100, 216, 255, 0.14), transparent 26%),
    radial-gradient(circle at 40% 80%, rgba(143, 124, 255, 0.1), transparent 30%),
    linear-gradient(180deg, #050c16 0%, #07111f 28%, #07101b 100%);
  min-height: 100vh;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { font: inherit; }
code, pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

.site-shell {
  position: relative;
  isolation: isolate;
}

.ambient {
  position: fixed;
  border-radius: 999px;
  filter: blur(80px);
  opacity: 0.6;
  pointer-events: none;
  z-index: -1;
}
.ambient-a {
  width: 420px; height: 420px; left: -80px; top: 120px;
  background: rgba(77, 121, 255, 0.18);
}
.ambient-b {
  width: 360px; height: 360px; right: -120px; top: 380px;
  background: rgba(73, 240, 203, 0.16);
}
.ambient-c {
  width: 320px; height: 320px; left: 40%; bottom: 120px;
  background: rgba(143, 124, 255, 0.12);
}

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

.section {
  padding: 42px 0;
}

.section-tight {
  padding-top: 8px;
}

.nav-spacer {
  height: 94px;
}

.hero {
  padding-top: 18px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  gap: 24px;
  align-items: center;
}

.eyebrow,
.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border: 1px solid rgba(119, 168, 255, 0.22);
  border-radius: 999px;
  background: rgba(12, 25, 44, 0.56);
  color: #dcecff;
  letter-spacing: 0.02em;
  font-size: 12px;
}

.eyebrow-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(180deg, var(--cyan), var(--blue));
  box-shadow: 0 0 18px rgba(100, 216, 255, 0.9);
}

.hero-copy h1,
.section-heading h2,
.feature-copy h2,
.platform-copy h2,
.cta-card h2 {
  margin: 18px 0 0;
  line-height: 1.02;
  letter-spacing: -0.03em;
}

.hero-copy h1 {
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.08;
  max-width: 12ch;
}

.hero-lead,
.section-heading p,
.feature-copy p,
.platform-copy p,
.cta-card p,
.advantage-card p,
.point-card p,
.metric-card span,
.trust-bar span,
.footer p,
.float-text {
  color: var(--text-soft);
}

.hero-lead {
  margin: 18px 0 0;
  font-size: 16px;
  line-height: 1.78;
  max-width: 620px;
}

.hero-actions,
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
  font-size: 14px;
}

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

.btn-primary {
  color: #06111f;
  background: linear-gradient(135deg, #8dc2ff 0%, #7df5de 100%);
  box-shadow: 0 10px 30px rgba(98, 186, 255, 0.24);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.03);
  border-color: rgba(255, 255, 255, 0.12);
}

.glass-panel {
  background: linear-gradient(180deg, rgba(11, 22, 40, 0.84), rgba(9, 18, 34, 0.66));
  border: 1px solid var(--panel-border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.hero-metrics {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.metric-card {
  padding: 16px 16px 14px;
  border-radius: var(--radius-lg);
}

.metric-card strong,
.trust-bar strong,
.float-title,
.advantage-card h3,
.point-card h3 {
  display: block;
  font-size: 15px;
}

.metric-card span {
  display: block;
  margin-top: 6px;
  line-height: 1.6;
  font-size: 13px;
}

.hero-visual-card {
  position: relative;
  padding: 16px;
  border-radius: 28px;
  overflow: hidden;
}

.hero-visual-card::before,
.code-panel::before,
.cta-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background: linear-gradient(140deg, rgba(141, 194, 255, 0.12), transparent 35%, transparent 65%, rgba(125, 245, 222, 0.08));
}

.hero-visual-card img {
  width: 100%;
  height: auto;
  border-radius: 22px;
}

.hero-float {
  position: absolute;
  padding: 12px 14px;
  border-radius: 16px;
  width: 200px;
}

.hero-float-a { left: 12px; bottom: 26px; }
.hero-float-b { right: 12px; top: 24px; }
.float-title {
  margin-bottom: 6px;
}
.float-text {
  font-size: 12px;
  line-height: 1.55;
}

.trust-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding: 18px 20px;
  border-radius: 22px;
}

.trust-bar span,
.footer-brand span {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.65;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 24px;
}

.section-heading h2,
.feature-copy h2,
.platform-copy h2,
.cta-card h2 {
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1.18;
}

.section-heading p,
.feature-copy p,
.platform-copy p,
.cta-card p {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.78;
}

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

.advantage-card,
.point-card {
  padding: 22px;
  border-radius: 22px;
}

.card-icon {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  margin-bottom: 20px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18), 0 12px 30px rgba(0, 0, 0, 0.24);
}
.card-blue { background: linear-gradient(135deg, rgba(119, 168, 255, 0.92), rgba(75, 118, 255, 0.82)); }
.card-cyan { background: linear-gradient(135deg, rgba(100, 216, 255, 0.92), rgba(65, 164, 255, 0.82)); }
.card-violet { background: linear-gradient(135deg, rgba(143, 124, 255, 0.92), rgba(100, 85, 255, 0.82)); }
.card-teal { background: linear-gradient(135deg, rgba(73, 240, 203, 0.92), rgba(67, 192, 255, 0.82)); }

.advantage-card h3,
.point-card h3 {
  margin: 0 0 10px;
  font-size: 18px;
}

.advantage-card p,
.point-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
}

.feature-stack {
  display: grid;
  gap: 22px;
}

.feature-row {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 24px;
  align-items: center;
}

.feature-row-reverse {
  grid-template-columns: 1.05fr 0.95fr;
}
.feature-row-reverse .feature-media { order: 2; }
.feature-row-reverse .feature-copy { order: 1; }

.feature-media {
  padding: 16px;
  border-radius: 24px;
}

.feature-media img {
  width: 100%;
  border-radius: 22px;
}

.feature-list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.feature-list li {
  position: relative;
  padding-left: 20px;
  color: var(--text-soft);
  font-size: 14px;
  line-height: 1.68;
}
.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(180deg, var(--cyan), var(--teal));
  box-shadow: 0 0 18px rgba(100, 216, 255, 0.72);
}

.code-panel {
  position: relative;
  border-radius: 28px;
  overflow: hidden;
}

.code-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.02);
}

.tab-group {
  display: inline-flex;
  padding: 4px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.tab-btn,
.copy-btn {
  border: 0;
  cursor: pointer;
}

.tab-btn {
  color: var(--text-soft);
  background: transparent;
  padding: 9px 15px;
  border-radius: 999px;
  transition: background 180ms ease, color 180ms ease;
  font-size: 14px;
}

.tab-btn.active {
  color: #07111f;
  background: linear-gradient(135deg, #9cc8ff 0%, #82f2df 100%);
}

.copy-btn {
  padding: 9px 15px;
  border-radius: 999px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: background 180ms ease, border-color 180ms ease;
  font-size: 14px;
}
.copy-btn:hover {
  background: rgba(255, 255, 255, 0.08);
}

.code-blocks {
  position: relative;
}

.code-block {
  display: none;
  margin: 0;
  padding: 22px;
  overflow: auto;
  font-size: 13px;
  line-height: 1.72;
  color: #d9f5ff;
}

.code-block.active { display: block; }

.platform-grid {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: 20px;
  align-items: start;
}

.platform-points {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.cta-section {
  padding-bottom: 30px;
}

.cta-card {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 20px;
  padding: 26px;
  border-radius: 26px;
  overflow: hidden;
}

.footer {
  padding: 0 0 28px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 10px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.footer-brand img {
  width: 34px;
  height: 34px;
}

.footer p {
  margin: 0;
  font-size: 13px;
  color: var(--text-soft);
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 700ms ease, transform 700ms ease;
}
.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb {
  background: rgba(137, 176, 255, 0.28);
  border-radius: 999px;
}
::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.02);
}

@media (max-width: 1120px) {
  .hero-grid,
  .feature-row,
  .feature-row-reverse,
  .platform-grid,
  .cta-card {
    grid-template-columns: 1fr;
  }

  .feature-row-reverse .feature-media,
  .feature-row-reverse .feature-copy {
    order: initial;
  }

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

  .platform-points,
  .hero-metrics {
    grid-template-columns: 1fr;
  }

  .trust-bar {
    grid-template-columns: 1fr;
  }

  .cta-actions { margin-top: 0; }
}

@media (max-width: 720px) {
  .container {
    width: min(calc(100% - 28px), var(--container));
  }

  .nav-spacer { height: 78px; }
  .section { padding: 34px 0; }

  .hero-lead,
  .section-heading p,
  .feature-copy p,
  .platform-copy p,
  .cta-card p {
    font-size: 15px;
  }

  .hero-float {
    position: static;
    width: auto;
    margin-top: 14px;
  }

  .hero-visual-card {
    padding: 14px;
  }

  .advantage-grid,
  .platform-points {
    grid-template-columns: 1fr;
  }

  .code-toolbar,
  .footer-inner {
    flex-direction: column;
    align-items: stretch;
  }

  .tab-group {
    width: 100%;
    justify-content: space-between;
  }

  .tab-btn {
    flex: 1;
    text-align: center;
  }

  .code-block {
    padding: 18px;
    font-size: 12px;
  }

  .cta-card {
    padding: 22px;
  }
}