:root {
  --primary: #3b5cff;
  --primary-dark: #243b9f;
  --secondary: #7b61ff;
  --accent: #19c2ff;
  --text: #172033;
  --text-light: #5b6475;
  --line: rgba(23, 32, 51, 0.08);
  --bg: #f5f8ff;
  --white: #ffffff;
  --dark: #0f172a;
  --shadow: 0 20px 60px rgba(25, 54, 122, 0.12);
  --radius: 24px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #f7f9ff 0%, #eef4ff 100%);
  line-height: 1.7;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(18px);
  background: rgba(255, 255, 255, 0.82);
  border-bottom: 1px solid rgba(255, 255, 255, 0.5);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 78px;
  gap: 24px;
}

.logo {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--dark);
}
.logo span { color: var(--primary); }

.nav {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.nav a {
  padding: 10px 18px;
  border-radius: 999px;
  color: var(--text-light);
  font-weight: 600;
  transition: all .25s ease;
}

.nav a:hover,
.nav a.active {
  color: var(--primary);
  background: rgba(59, 92, 255, 0.08);
}

.hero {
  padding: 72px 0 48px;
}

.hero-grid,
.split-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 42px;
  align-items: center;
}

.hero-text h1,
.inner-hero h1 {
  margin: 18px 0;
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.hero-text p,
.inner-hero p,
.content-box p,
.card p,
.cta-box p {
  color: var(--text-light);
  font-size: 16px;
}

.badge,
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(59, 92, 255, 0.1);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.eyebrow.light {
  color: #dbe5ff;
  background: rgba(255, 255, 255, 0.12);
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin: 28px 0 32px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 24px;
  border-radius: 999px;
  font-weight: 700;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

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

.btn-primary {
  color: var(--white);
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  box-shadow: 0 12px 30px rgba(59, 92, 255, 0.3);
}

.btn-secondary {
  color: var(--primary);
  background: rgba(59, 92, 255, 0.08);
}

.btn-white {
  color: var(--primary-dark);
  background: var(--white);
}

.hero-metrics,
.stats-panel,
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.hero-metrics div,
.stats-panel div,
.contact-grid div {
  padding: 18px 20px;
  background: rgba(255,255,255,0.78);
  border: 1px solid rgba(255,255,255,0.75);
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.hero-metrics strong,
.stats-panel strong,
.contact-grid strong {
  display: block;
  margin-bottom: 6px;
  font-size: 16px;
}

.hero-metrics span,
.stats-panel span,
.contact-grid span {
  color: var(--text-light);
  font-size: 14px;
}

.with-cover {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(59, 92, 255, 0.88), rgba(25, 194, 255, 0.65)),
    var(--bg-image, linear-gradient(135deg, #1f49ff, #7b61ff));
  background-image:
    linear-gradient(135deg, rgba(18, 26, 52, 0.34), rgba(32, 63, 164, 0.18)),
    var(--bg);
  background-size: cover;
  background-position: center;
}

.hero-visual,
.image-box {
  min-height: 460px;
  border-radius: 32px;
  box-shadow: var(--shadow);
}

.image-card::before,
.image-box::before,
.inner-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top right, rgba(255,255,255,0.2), transparent 35%);
}

.image-overlay-card {
  position: relative;
  z-index: 1;
  padding: 28px;
  display: flex;
  height: 100%;
  min-height: 460px;
  flex-direction: column;
  justify-content: flex-end;
}

.mini-panel,
.mini-stats {
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 20px;
  color: #fff;
}

.mini-panel {
  max-width: 320px;
  padding: 22px;
  margin-bottom: 14px;
}
.mini-panel h3 { margin: 0 0 8px; font-size: 20px; }
.mini-panel p { margin: 0; color: rgba(255,255,255,0.84); }

.mini-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 14px;
}
.mini-stats span {
  padding: 10px 14px;
  background: rgba(255,255,255,0.12);
  border-radius: 999px;
  font-size: 13px;
}

.section {
  padding: 86px 0;
}

.section.alt {
  background: rgba(255,255,255,0.58);
}

.section-head {
  max-width: 760px;
  margin: 0 auto 40px;
  text-align: center;
}
.section-head.left { margin-left: 0; text-align: left; }
.section-head h2,
.content-box h2,
.cta-box h2,
.contact-card h2 {
  margin: 16px 0 10px;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.2;
}

.feature-grid {
  display: grid;
  gap: 24px;
}
.feature-grid.two { grid-template-columns: repeat(2, 1fr); }
.feature-grid.three { grid-template-columns: repeat(3, 1fr); }
.feature-grid.four { grid-template-columns: repeat(4, 1fr); }

.card {
  padding: 30px;
  border-radius: 24px;
  background: rgba(255,255,255,0.92);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.card h3 { margin: 0 0 12px; font-size: 22px; }
.card.compact { padding: 24px; }
.card.compact h3 { font-size: 20px; }
.card.large { min-height: 220px; }

.content-box,
.contact-card {
  padding: 12px 0;
}

.check-list,
.timeline-list {
  display: grid;
  gap: 14px;
  margin: 22px 0 30px;
  padding: 0;
  list-style: none;
}

.check-list li,
.timeline-list > div {
  padding: 18px 20px;
  border-radius: 18px;
  background: rgba(255,255,255,0.9);
  border: 1px solid var(--line);
  box-shadow: 0 12px 35px rgba(26, 44, 97, 0.08);
}

.timeline-list strong {
  display: block;
  margin-bottom: 6px;
  font-size: 17px;
}
.timeline-list p { margin: 0; }

.reverse { grid-template-columns: 0.95fr 1.05fr; }

.inner-hero {
  position: relative;
  padding: 110px 0 92px;
  color: #fff;
  overflow: hidden;
  background-image:
    linear-gradient(135deg, rgba(11, 20, 46, 0.72), rgba(54, 81, 194, 0.56)),
    var(--bg);
  background-size: cover;
  background-position: center;
}

.inner-hero p,
.inner-hero .badge { color: #fff; }
.inner-hero .badge { background: rgba(255,255,255,0.14); }

.cta-section {
  padding: 20px 0 90px;
}

.cta-box {
  padding: 42px;
  border-radius: 30px;
  background: linear-gradient(135deg, #122d99 0%, #4b62ff 45%, #17b9ff 100%);
  color: #fff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  box-shadow: 0 24px 60px rgba(44, 72, 180, 0.3);
}

.contact-card {
  padding: 40px;
  border-radius: 28px;
  background: rgba(255,255,255,0.94);
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
}
.contact-grid { grid-template-columns: repeat(4, 1fr); margin-top: 24px; }

.site-footer {
  padding: 26px 0 40px;
}
.footer-wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 30px;
  padding-top: 18px;
  border-top: 1px solid rgba(23, 32, 51, 0.08);
}
.footer-logo { margin-bottom: 10px; }
.footer-wrap p { margin: 0; color: var(--text-light); }
.footer-links { display: flex; flex-wrap: wrap; gap: 16px; }
.footer-links a { color: var(--text-light); }
.footer-links a:hover { color: var(--primary); }

@media (max-width: 1080px) {
  .hero-grid,
  .split-grid,
  .reverse,
  .feature-grid.four,
  .contact-grid,
  .hero-metrics,
  .stats-panel {
    grid-template-columns: repeat(2, 1fr);
  }

  .feature-grid.three,
  .feature-grid.two {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 820px) {
  .nav-wrap,
  .cta-box,
  .footer-wrap,
  .hero-grid,
  .split-grid,
  .reverse,
  .feature-grid.two,
  .feature-grid.three,
  .feature-grid.four,
  .contact-grid,
  .hero-metrics,
  .stats-panel {
    grid-template-columns: 1fr;
    display: grid;
  }

  .nav-wrap,
  .footer-wrap,
  .cta-box {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
  }

  .nav { width: 100%; }
  .hero,
  .section { padding: 64px 0; }
  .inner-hero { padding: 86px 0 72px; }
  .hero-visual,
  .image-box { min-height: 320px; }
  .image-overlay-card { min-height: 320px; }
  .contact-card { padding: 28px; }
}

@media (max-width: 540px) {
  .container { width: min(100% - 28px, 1180px); }
  .nav a { padding: 8px 12px; }
  .btn { width: 100%; }
  .hero-actions { flex-direction: column; }
  .card, .contact-card, .cta-box { padding: 24px; }
  .hero-text h1, .inner-hero h1 { font-size: 34px; }
}