:root {
  --bg: #f5f7fb;
  --card: #ffffff;
  --text: #1d2736;
  --muted: #5f6f85;
  --primary: #246bff;
  --primary-dark: #174dba;
  --line: #d9e2f0;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(245, 247, 251, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}

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

.brand {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  font-weight: 700;
}

.brand img {
  width: 36px;
  height: 36px;
}

.site-nav {
  display: flex;
  gap: 20px;
}

.site-nav a {
  color: var(--muted);
  font-weight: 600;
}

.site-nav a.active,
.site-nav a:hover {
  color: var(--text);
}

.menu-toggle {
  display: none;
  border: 0;
  background: transparent;
  font-size: 24px;
  cursor: pointer;
}

.hero,
.sub-hero {
  background: linear-gradient(145deg, #eaf1ff, #f8fbff 48%, #eef3ff);
}

.hero {
  padding: 80px 0 72px;
}

.sub-hero {
  padding: 64px 0 44px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 28px;
  align-items: stretch;
}

.tag {
  display: inline-block;
  margin: 0 0 14px;
  color: #184290;
  font-weight: 700;
  letter-spacing: 0.03em;
}

h1 {
  margin: 0;
  line-height: 1.2;
  font-size: clamp(30px, 5vw, 52px);
}

.sub {
  margin-top: 18px;
  max-width: 56ch;
  color: var(--muted);
}

.hero-card {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 20px;
  padding: 24px;
  box-shadow: 0 8px 24px rgba(20, 53, 120, 0.06);
}

.hero-card h3 {
  margin-top: 0;
}

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

.metric-list {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.metric-list strong {
  font-size: 22px;
  display: block;
  color: #1b3f88;
}

.cta-group {
  margin-top: 26px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 11px 18px;
  border-radius: 999px;
  font-weight: 700;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

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

.btn-ghost {
  border: 1px solid var(--line);
}

.section {
  padding: 62px 0;
}

.section-alt {
  background: #edf2fa;
}

h2 {
  margin-top: 0;
  font-size: clamp(24px, 4vw, 34px);
}

.card-grid {
  display: grid;
  gap: 20px;
}

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

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

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 20px;
  box-shadow: 0 8px 24px rgba(20, 53, 120, 0.05);
}

.image-card .img-block {
  width: 100%;
  height: 200px;
  border-radius: 16px;
  margin-bottom: 16px;
}

.image-card .img-real {
  width: 100%;
  height: 220px;
  border-radius: 16px;
  margin-bottom: 16px;
  object-fit: cover;
  border: 1px solid #dbe5f5;
  background: #e9eef9;
}

.image-card .img-real-center {
  object-fit: cover;
  object-position: center center;
}

.eyebrow {
  color: #1b4eaa;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.03em;
  margin-bottom: 6px;
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.kpi {
  background: #f6f9ff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px;
}

.kpi strong {
  display: block;
  font-size: 24px;
  color: #16459b;
}

.kpi-img {
  width: 100%;
  height: 140px;
  margin: 10px 0 8px;
  border-radius: 10px;
  object-fit: cover;
  display: block;
  border: 1px solid #d7e2f5;
  background: #e9eef9;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.timeline .card {
  border-radius: 14px;
}

.contact-form {
  display: grid;
  gap: 10px;
}

.contact-form label {
  font-weight: 600;
  color: #324865;
  margin-top: 6px;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid #c9d7ef;
  background: #f8fbff;
  color: #243348;
  font: inherit;
}

.contact-form textarea {
  resize: vertical;
}

.wechat-card {
  margin-top: 14px;
  display: flex;
  gap: 14px;
  align-items: center;
  padding: 12px;
  border-radius: 12px;
  border: 1px dashed #c3d5f5;
  background: #f6f9ff;
}

.qr-box {
  width: 74px;
  height: 74px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-weight: 700;
  color: #1d448f;
  background: linear-gradient(135deg, #d4e3ff, #b6ccf5);
  border: 1px solid #b7caf0;
}

.wechat-title {
  font-weight: 700;
  color: #1d448f;
  margin: 0 0 4px;
}

.gradient-1 {
  background: linear-gradient(135deg, #2b7bff, #9cc0ff);
}

.gradient-2 {
  background: linear-gradient(135deg, #5073a7, #c0d0eb);
}

.gradient-3 {
  background: linear-gradient(135deg, #1f5c92, #84abc8);
}

.gradient-4 {
  background: linear-gradient(135deg, #2f4e7d, #a8c0e9);
}

p {
  color: var(--muted);
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #f0f4fb;
}

.footer-wrap {
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.footer-wrap p {
  margin: 0;
  font-size: 14px;
}

@media (max-width: 900px) {
  .hero-grid,
  .card-grid.three,
  .kpi-grid,
  .timeline {
    grid-template-columns: 1fr;
  }

  .card-grid.two {
    grid-template-columns: 1fr;
  }

  .site-nav {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: #f5f7fb;
    border-bottom: 1px solid var(--line);
    padding: 10px 4%;
    display: none;
    flex-direction: column;
    gap: 12px;
  }

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

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

  .metric-list {
    grid-template-columns: 1fr;
  }
}