/* ========== Reset & Base ========== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
               "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: #1a2236;
  background: #fff;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
ul { padding: 0; margin: 0; list-style: none; }
img { max-width: 100%; display: block; }

.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }

/* ========== Header / Nav ========== */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.85);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid rgba(0,0,0,.06);
}
.nav-wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; }
.logo-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: 8px;
  background: linear-gradient(135deg, #2962ff, #00b0ff);
  color: #fff; font-weight: 800;
}
.logo-text { letter-spacing: .5px; }

.nav { display: flex; gap: 28px; }
.nav a {
  font-size: 15px; color: #4b5563; position: relative; padding: 6px 0;
  transition: color .2s;
}
.nav a:hover { color: #2962ff; }
.nav a::after {
  content:""; position: absolute; left: 0; bottom: 0; height: 2px; width: 0;
  background: #2962ff; transition: width .25s;
}
.nav a:hover::after { width: 100%; }

.nav-toggle {
  display: none; background: none; border: 0; padding: 8px; cursor: pointer;
}
.nav-toggle span {
  display: block; width: 22px; height: 2px; background: #1a2236; margin: 4px 0;
}

/* ========== Hero ========== */
.hero {
  position: relative; overflow: hidden;
  padding: 110px 0 130px;
  background: linear-gradient(180deg, #f4f8ff 0%, #ffffff 100%);
}
.hero-inner { position: relative; z-index: 2; text-align: center; }
.hero-eyebrow {
  font-size: 12px; letter-spacing: 4px; color: #2962ff;
  margin: 0 0 16px; font-weight: 600;
}
.hero-title {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 800; margin: 0 0 18px;
  background: linear-gradient(120deg, #0b1f4d 0%, #2962ff 60%, #00b0ff 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub { font-size: 18px; color: #4b5563; margin: 0 0 28px; }
.hero-tags { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-bottom: 36px; }
.hero-tags span {
  font-size: 13px; padding: 6px 14px; border-radius: 999px;
  background: #ffffff; border: 1px solid #e0e7ff; color: #2962ff;
  box-shadow: 0 1px 2px rgba(41,98,255,.06);
}
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-block; padding: 12px 26px; border-radius: 8px;
  font-size: 15px; font-weight: 600; transition: all .2s;
}
.btn-primary {
  background: linear-gradient(135deg, #2962ff, #00b0ff);
  color: #fff; box-shadow: 0 6px 18px rgba(41,98,255,.28);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(41,98,255,.34); }
.btn-ghost {
  background: #fff; color: #2962ff; border: 1px solid #cfdcff;
}
.btn-ghost:hover { background: #f4f8ff; }

.hero-bg {
  position: absolute; inset: 0; z-index: 1; opacity: .5;
  background:
    radial-gradient(600px 300px at 15% 20%, rgba(41,98,255,.18), transparent 60%),
    radial-gradient(500px 280px at 85% 30%, rgba(0,176,255,.18), transparent 60%),
    radial-gradient(700px 360px at 50% 100%, rgba(41,98,255,.12), transparent 60%);
}

/* ========== Sections ========== */
.section { padding: 90px 0; }
.section-alt { background: #f7f9fc; }
.section-head { text-align: center; margin-bottom: 56px; }
.section-head h2 { font-size: 32px; margin: 0 0 8px; font-weight: 700; }
.section-sub {
  margin: 0; font-size: 12px; letter-spacing: 4px;
  color: #94a3b8; text-transform: uppercase;
}

/* ========== About ========== */
.about-grid {
  display: grid; gap: 40px;
  grid-template-columns: 1.2fr 1fr; align-items: center;
}
.about-text p { color: #4b5563; font-size: 16px; margin: 0 0 14px; }
.about-meta { margin-top: 24px; border-top: 1px solid #e5e7eb; }
.about-meta li {
  display: flex; justify-content: space-between; gap: 12px;
  padding: 12px 0; border-bottom: 1px solid #e5e7eb; font-size: 14px;
}
.about-meta strong { color: #1a2236; }
.about-meta span { color: #6b7280; text-align: right; }

.about-stats {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
}
.stat {
  background: linear-gradient(135deg, #ffffff, #f4f8ff);
  border: 1px solid #e0e7ff; border-radius: 14px;
  padding: 28px 22px; text-align: center;
}
.stat-num {
  font-size: 36px; font-weight: 800; color: #2962ff; line-height: 1;
}
.stat-num sup { font-size: 16px; margin-left: 2px; }
.stat-label { margin-top: 8px; font-size: 14px; color: #6b7280; }

/* ========== Steps ========== */
.steps {
  display: grid; gap: 24px;
  grid-template-columns: repeat(4, 1fr);
}
.step {
  background: #fff; border-radius: 14px; padding: 28px 24px;
  border: 1px solid #e5e7eb; position: relative;
  transition: transform .25s, box-shadow .25s;
}
.step:hover { transform: translateY(-4px); box-shadow: 0 18px 36px rgba(15,42,113,.08); }
.step-num {
  font-size: 14px; font-weight: 700; color: #2962ff;
  letter-spacing: 2px; margin-bottom: 12px;
}
.step h3 { margin: 0 0 6px; font-size: 20px; }
.step-tag {
  display: inline-block; font-size: 12px; color: #2962ff;
  background: #eaf1ff; padding: 2px 10px; border-radius: 999px; margin: 0 0 16px;
}
.step ul li {
  font-size: 14px; color: #4b5563; padding: 6px 0;
  border-top: 1px dashed #e5e7eb;
}
.step ul li:first-child { border-top: 0; }

/* ========== Cards (Partners) ========== */
.cards {
  display: grid; gap: 24px;
  grid-template-columns: repeat(3, 1fr);
}
.card {
  background: #fff; border-radius: 16px; padding: 32px 28px;
  border: 1px solid #e5e7eb; position: relative;
  transition: transform .25s, box-shadow .25s;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 22px 44px rgba(15,42,113,.08); }
.card-badge {
  display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: 1px;
  padding: 4px 10px; border-radius: 6px;
  background: linear-gradient(135deg, #2962ff, #00b0ff); color: #fff;
  margin-bottom: 18px;
}
.card h3 { margin: 0 0 8px; font-size: 22px; }
.card p { color: #6b7280; margin: 0 0 16px; }
.card ul li {
  font-size: 14px; color: #4b5563; padding: 8px 0 8px 22px;
  position: relative;
}
.card ul li::before {
  content: ""; position: absolute; left: 0; top: 16px;
  width: 6px; height: 6px; border-radius: 50%; background: #2962ff;
}

/* ========== Advantages ========== */
.adv-grid {
  display: grid; gap: 24px;
  grid-template-columns: repeat(4, 1fr);
}
.adv {
  background: #fff; border-radius: 14px; padding: 28px 22px;
  border: 1px solid #e5e7eb; text-align: center;
  transition: transform .25s, box-shadow .25s;
}
.adv:hover { transform: translateY(-4px); box-shadow: 0 18px 36px rgba(15,42,113,.08); }
.adv-icon {
  font-size: 32px; line-height: 1;
  width: 60px; height: 60px; border-radius: 14px;
  background: linear-gradient(135deg, #eaf1ff, #e0f4ff);
  display: inline-flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
}
.adv h3 { margin: 0 0 8px; font-size: 18px; }
.adv p { margin: 0; color: #6b7280; font-size: 14px; }

/* ========== Contact / CTA ========== */
.section-cta { padding: 90px 0; }
.cta-panel {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
  padding: 56px 32px;
  background: linear-gradient(135deg, #ffffff, #f4f8ff);
  border: 1px solid #e0e7ff;
  border-radius: 20px;
  box-shadow: 0 18px 48px rgba(15, 42, 113, .06);
}
.cta-eyebrow {
  margin: 0 0 10px;
  font-size: 12px; letter-spacing: 4px;
  color: #94a3b8; text-transform: uppercase;
}
.cta-title {
  margin: 0 0 14px;
  font-size: 32px; font-weight: 700; color: #1a2236;
}
.cta-sub {
  margin: 0 auto 28px;
  max-width: 480px;
  color: #6b7280; font-size: 15px;
}
.cta-email {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 28px;
  font-size: 18px; font-weight: 600;
  color: #2962ff;
  background: #ffffff;
  border: 1px solid #cfdcff;
  border-radius: 999px;
  transition: all .2s;
}
.cta-email:hover {
  color: #fff;
  background: linear-gradient(135deg, #2962ff, #00b0ff);
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(41, 98, 255, .28);
}
.cta-email svg { flex-shrink: 0; }

@media (max-width: 720px) {
  .cta-panel { padding: 40px 22px; }
  .cta-title { font-size: 26px; }
  .cta-email { font-size: 15px; padding: 12px 22px; }
}

/* ========== Footer ========== */
.footer {
  background: #0b1f4d; color: #cbd5e1; padding: 28px 0;
}
.footer-inner {
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  flex-wrap: wrap;
}
.footer-brand {
  display: flex; align-items: center; gap: 10px; font-weight: 700; color: #fff;
}
.footer-copy, .footer-icp { margin: 0; font-size: 13px; }
.footer-icp a { color: #94a3b8; }
.footer-icp a:hover { color: #fff; }

/* ========== Responsive ========== */
@media (max-width: 960px) {
  .about-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .cards { grid-template-columns: 1fr; }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .nav {
    position: absolute; top: 64px; left: 0; right: 0;
    background: #fff; border-bottom: 1px solid rgba(0,0,0,.06);
    flex-direction: column; gap: 0; padding: 8px 0;
    max-height: 0; overflow: hidden; transition: max-height .25s ease;
  }
  .nav.open { max-height: 400px; }
  .nav a { padding: 12px 24px; }
  .nav a::after { display: none; }
  .hero { padding: 80px 0 90px; }
  .section { padding: 64px 0; }
  .section-head { margin-bottom: 36px; }
  .steps { grid-template-columns: 1fr; }
  .adv-grid { grid-template-columns: 1fr; }
  .about-stats { grid-template-columns: 1fr 1fr; }
  .footer-inner { flex-direction: column; text-align: center; }
}