:root {
  --bg: #f4f7ff;
  --bg-soft: #eef3ff;
  --text: #0b1533;
  --muted: #52607a;
  --primary: #1753d6;
  --primary-dark: #0d3b9e;
  --primary-soft: #e5eeff;
  --white: #ffffff;
  --line: #d8e2f3;
  --shadow-sm: 0 8px 24px rgba(16, 36, 84, 0.08);
  --shadow-md: 0 18px 46px rgba(16, 36, 84, 0.12);
  --shadow-lg: 0 24px 60px rgba(9, 23, 62, 0.18);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body::before,
body::after {
  content: "";
  position: fixed;
  z-index: -1;
  width: min(48vw, 540px);
  height: min(48vw, 540px);
  border-radius: 50%;
  pointer-events: none;
  filter: blur(8px);
}

body::before {
  top: -180px;
  right: -120px;
  background: radial-gradient(circle, rgba(23, 83, 214, 0.18) 0%, rgba(23, 83, 214, 0) 72%);
}

body::after {
  bottom: -220px;
  left: -130px;
  background: radial-gradient(circle, rgba(46, 118, 255, 0.14) 0%, rgba(46, 118, 255, 0) 72%);
}

a {
  transition: color 0.24s ease, opacity 0.24s ease, transform 0.24s ease, background-color 0.24s ease, border-color 0.24s ease;
}

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

.site-header {
  background: rgba(255, 255, 255, 0.84);
  border-bottom: 1px solid rgba(216, 226, 243, 0.72);
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: saturate(180%) blur(12px);
  box-shadow: 0 6px 24px rgba(10, 28, 68, 0.05);
}

.nav-wrap {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  box-shadow: 0 4px 14px rgba(13, 59, 141, 0.18);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 18px;
}

.site-nav a {
  text-decoration: none;
  color: #1b2a46;
  font-weight: 600;
  position: relative;
}

.site-nav a:not(.btn-link)::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -8px;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: right;
  background: var(--primary);
  transition: transform 0.24s ease;
}

.site-nav a:hover:not(.btn-link)::after,
.site-nav a.active:not(.btn-link)::after {
  transform: scaleX(1);
  transform-origin: left;
}

.site-nav a.active {
  color: var(--primary);
}

.btn-link {
  padding: 9px 16px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff !important;
  border-radius: 999px;
  box-shadow: 0 10px 24px rgba(23, 83, 214, 0.28);
}

.btn-link:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 28px rgba(23, 83, 214, 0.34);
}

.menu-toggle {
  display: none;
  border: 1px solid #c9d8f4;
  border-radius: 8px;
  padding: 8px 12px;
  background: rgba(255, 255, 255, 0.9);
  color: #19305a;
  font-weight: 600;
}

.hero {
  background: linear-gradient(155deg, #eaf1ff, #f8fbff 46%, #edf4ff);
  border-bottom: 1px solid rgba(216, 226, 243, 0.9);
  padding: 84px 0 76px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  right: -180px;
  top: -220px;
  background: radial-gradient(circle, rgba(26, 88, 223, 0.24), rgba(26, 88, 223, 0));
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 28px;
}

.eyebrow {
  margin: 0 0 8px;
  color: #1a4ec4;
  font-weight: 600;
  letter-spacing: 0.03em;
}

h1,
h2,
h3 {
  margin: 0 0 12px;
  line-height: 1.24;
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(1.92rem, 2.8vw, 3.08rem);
  max-width: 13.4em;
}

.lead {
  color: var(--muted);
  max-width: 720px;
  font-size: clamp(1rem, 1.45vw, 1.12rem);
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-top: 18px;
  flex-wrap: wrap;
}

.hero-metrics {
  margin-top: 20px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  max-width: 640px;
}

.hero-metrics article {
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid #d8e4f7;
  border-radius: 12px;
  padding: 10px 12px;
}

.hero-metrics strong {
  display: block;
  line-height: 1.1;
  font-size: 1.2rem;
  color: var(--primary-dark);
}

.hero-metrics span {
  color: #5f6f89;
  font-size: 0.9rem;
}

.btn {
  text-decoration: none;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  padding: 11px 18px;
  border-radius: 12px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  box-shadow: 0 12px 24px rgba(23, 83, 214, 0.24);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 30px rgba(23, 83, 214, 0.3);
}

.btn-light {
  background: var(--white);
  color: var(--primary);
  border: 1px solid #c6d5f0;
  box-shadow: var(--shadow-sm);
}

.btn-light:hover {
  border-color: #adc5ec;
}

.hero-card {
  background: linear-gradient(180deg, #ffffff, #fbfdff);
  border: 1px solid #d4e0f4;
  border-radius: 18px;
  padding: 22px;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

.hero-card::before {
  content: "";
  position: absolute;
  inset: auto -20% 0 auto;
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, rgba(23, 83, 214, 0.15), rgba(23, 83, 214, 0));
  pointer-events: none;
}

.hero-card ul {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
}

.section {
  padding: 72px 0;
}

.section.alt {
  background: linear-gradient(180deg, #edf3ff, #f3f7ff);
  border-top: 1px solid #dbe5f5;
  border-bottom: 1px solid #dbe5f5;
}

.trust-strip {
  padding-top: 26px;
  padding-bottom: 26px;
}

.trust-strip p {
  margin: 0;
  border: 1px solid #d8e3f5;
  background: linear-gradient(180deg, #f8fbff, #f4f8ff);
  border-radius: 12px;
  padding: 12px 16px;
  color: #4c5d7a;
  font-weight: 500;
  text-align: center;
}

.grid {
  display: grid;
  gap: 20px;
  margin-top: 18px;
}

.cards-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.cards-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
  background: linear-gradient(180deg, #ffffff, #fcfdff);
  border: 1px solid #d8e3f5;
  border-radius: 16px;
  padding: 22px 20px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.26s ease, box-shadow 0.28s ease, border-color 0.28s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: #c6d8f3;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.card ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

.stat-card h3 {
  font-size: 2rem;
  margin-bottom: 4px;
  color: var(--primary);
}

.timeline {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.timeline-item {
  background: var(--white);
  border: 1px solid #d8e3f5;
  border-left: 4px solid var(--primary);
  border-radius: 12px;
  padding: 18px;
  box-shadow: var(--shadow-sm);
}

.timeline-item h3 {
  margin-bottom: 6px;
}

.timeline-item p {
  margin: 0;
  color: var(--muted);
}

.cta-box {
  background: linear-gradient(140deg, #0f3f9a, #1a5bdc);
  color: #fff;
  border-radius: 22px;
  padding: 34px 30px;
  text-align: center;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.cta-box::after {
  content: "";
  position: absolute;
  width: 220px;
  height: 220px;
  right: -70px;
  top: -70px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.26), rgba(255, 255, 255, 0));
}

.cta-box h2 {
  margin-bottom: 8px;
}

.cta-box p {
  margin: 0 0 16px;
  color: #dbe9ff;
}

.cta-box .btn {
  background: #fff;
  color: var(--primary);
  box-shadow: none;
}

.cta-box .btn:hover {
  box-shadow: inset 0 0 0 1px #d7e4ff;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.contact-form label {
  font-size: 0.92rem;
  color: #334155;
  font-weight: 600;
}

.contact-form input,
.contact-form textarea {
  border: 1px solid #d0dcf1;
  border-radius: 10px;
  padding: 11px 12px;
  font: inherit;
  background: #fcfdff;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid #bfdbfe;
  border-color: #93c5fd;
}

.form-tip {
  margin-top: 10px;
  font-size: 0.9rem;
  color: #64748b;
}

.site-footer {
  background: #f8fbff;
  border-top: 1px solid #d9e4f5;
}

.footer-wrap {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  gap: 12px;
}

.footer-links a {
  color: #334968;
  text-decoration: none;
  font-weight: 500;
}

.footer-links a:hover {
  color: var(--primary);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.52s ease, transform 0.52s ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 900px) {
  .section {
    padding: 58px 0;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .hero-metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .cards-3,
  .cards-2,
  .cards-4,
  .timeline {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  body::before,
  body::after {
    display: none;
  }

  .brand span {
    font-size: 0.92rem;
  }

  .menu-toggle {
    display: inline-block;
  }

  .site-nav {
    display: none;
    width: 100%;
    padding: 12px 0 14px;
    flex-direction: column;
    align-items: flex-start;
    background: rgba(255, 255, 255, 0.96);
    border-top: 1px solid #dee7f6;
    border-radius: 0 0 12px 12px;
  }

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

  .site-nav a:not(.btn-link)::after {
    bottom: -4px;
  }

  .hero {
    padding: 70px 0 60px;
  }

  .hero-metrics {
    grid-template-columns: 1fr;
    max-width: 100%;
  }

  .card,
  .hero-card {
    padding: 18px 16px;
  }
}