:root {
  --bg: #f5f8ff;
  --bg-soft: #eef3ff;
  --text: #1d2a44;
  --muted: #4b5d84;
  --primary: #2f63ff;
  --primary-dark: #2048c0;
  --card: #ffffff;
  --line: #d8e2ff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}

img {
  max-width: 100%;
  display: block;
}

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

.container {
  width: min(1100px, 92vw);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
}

.brand img {
  width: 36px;
  height: 36px;
  object-fit: contain;
}

.site-nav {
  display: flex;
  gap: 1rem;
  color: var(--muted);
  font-weight: 600;
}

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

.menu-toggle {
  display: none;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  border-radius: 8px;
  padding: 0.4rem 0.8rem;
  font-weight: 600;
}

.section {
  padding: 4.5rem 0;
}

.muted {
  background: var(--bg-soft);
}

.hero {
  padding-top: 5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2rem;
  align-items: center;
}

.tag {
  display: inline-block;
  margin: 0 0 0.6rem;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  background: #e7edff;
  color: var(--primary-dark);
  font-weight: 700;
  font-size: 0.86rem;
}

h1, h2, h3 {
  margin: 0 0 1rem;
  line-height: 1.3;
}

h1 {
  font-size: clamp(1.8rem, 2.8vw, 2.8rem);
}

h2 {
  font-size: clamp(1.4rem, 2.3vw, 2rem);
  margin-bottom: 1.5rem;
}

.lead {
  color: var(--muted);
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  gap: 0.8rem;
  margin-top: 1.4rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 1.1rem;
  border-radius: 10px;
  border: 1px solid transparent;
  font-weight: 700;
}

.btn.primary {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), #4f85ff);
}

.btn.primary:hover {
  background: linear-gradient(135deg, var(--primary-dark), #3f74ef);
}

.btn.ghost {
  border-color: var(--line);
  color: var(--primary-dark);
  background: #fff;
}

.hero-visual {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 1rem;
}

.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.2rem 1.2rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.1rem;
}

.card h3 {
  font-size: 1.06rem;
}

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

.advantage-list {
  margin: 0;
  padding-left: 1.2rem;
}

.advantage-list li {
  margin-bottom: 0.75rem;
  color: var(--muted);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1rem;
}

.contact-item {
  margin: 0.35rem 0;
}

.contact-phone {
  color: var(--primary);
  font-weight: 700;
  text-decoration: none;
}

.contact-phone:hover {
  text-decoration: underline;
}

.contact-note {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.2rem;
}

.btn.block {
  width: 100%;
}

.site-footer {
  padding: 1rem 0;
  background: #0f1b35;
  color: #c7d6ff;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.92rem;
}

@media (max-width: 960px) {
  .hero-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 720px) {
  .menu-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 72px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    padding: 0.7rem 4vw 1rem;
    display: none;
    flex-direction: column;
    gap: 0.4rem;
  }

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

  .cards {
    grid-template-columns: 1fr;
  }
}