/* === 全局样式 === */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --primary: #1a56db;
  --primary-dark: #1e40af;
  --accent: #06b6d4;
  --dark: #111827;
  --gray: #6b7280;
  --light: #f9fafb;
  --white: #ffffff;
  --border: #e5e7eb;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-lg: 0 10px 40px rgba(0,0,0,.1);
}
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--dark);
  line-height: 1.7;
  font-size: 19px;
  overflow-x: hidden;
}
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }

/* === 导航栏 === */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255,255,255,.92); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow .3s;
}
.navbar.scrolled { box-shadow: var(--shadow); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.45rem; }
.logo-icon {
  width: 36px; height: 36px; background: var(--primary); color: white;
  border-radius: 8px; display: flex; align-items: center; justify-content: center;
  font-size: .98rem; font-weight: 700;
}
.nav-links { display: flex; gap: 32px; list-style: none; }
.nav-links a { font-weight: 700; font-size: 1.1rem; color: var(--dark); transition: color .2s; }
.nav-links a:hover { color: var(--primary); }
.nav-cta { font-size: 1.18rem; 
  background: var(--primary); color: white; padding: 10px 24px;
  border-radius: 6px; font-weight: 600; transition: background .2s;
}
.nav-cta:hover { background: var(--primary-dark); }

/* === 英雄区 === */
.hero {
  padding: 160px 0 100px;
  background: linear-gradient(135deg, #1e3a5f 0%, #1a56db 50%, #06b6d4 100%);
  color: white; position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; top: -100px; right: -100px;
  width: 400px; height: 400px; background: rgba(255,255,255,.05); border-radius: 50%;
}
.hero-content { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; position: relative; }
.hero-badge {
  display: inline-block; background: rgba(255,255,255,.15); backdrop-filter: blur(4px);
  padding: 6px 16px; border-radius: 20px; font-size: .98rem; margin-bottom: 24px;
  border: 1px solid rgba(255,255,255,.2);
}
.hero h1 { font-size: 3.6rem; font-weight: 800; line-height: 1.2; margin-bottom: 20px; }
.highlight { color: #67e8f9; }
.hero p { font-size: 1.28rem; opacity: .9; max-width: 500px; margin-bottom: 32px; }
.hero-buttons { display: flex; gap: 16px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px; border-radius: 8px; font-weight: 600; font-size: 1.12rem;
  transition: all .2s; cursor: pointer; border: none;
}
.btn-primary { background: white; color: var(--primary); }
.btn-primary:hover { background: #f0f9ff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,.2); }
.btn-ghost { background: transparent; color: white; border: 1px solid rgba(255,255,255,.4); }
.btn-ghost:hover { background: rgba(255,255,255,.1); }
.btn-block { width: 100%; justify-content: center; }

.hero-visual { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; }
.hero-card {
  background: rgba(255,255,255,.1); backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,.15); border-radius: 16px;
  padding: 28px 24px; text-align: center; width: 160px; transition: transform .3s;
}
.hero-card:hover { transform: translateY(-8px); }
.hero-card-icon { font-size: 2.5rem; margin-bottom: 12px; }
.hero-card h3 { font-size: 1.12rem; margin-bottom: 6px; }
.hero-card p { font-size: .9rem; opacity: .7; }

/* === 通用区块 === */
.section { padding: 90px 0; }
.section-header { text-align: center; margin-bottom: 60px; }
.section-tag {
  display: inline-block; color: var(--primary); font-weight: 600;
  font-size: .98rem; letter-spacing: 2px; margin-bottom: 12px;
}
.section-header h2 { font-size: 2.6rem; font-weight: 800; margin-bottom: 16px; }
.section-sub { color: var(--gray); font-size: 1.18rem; max-width: 600px; margin: 0 auto; }

/* === 关于我们 === */
.about { background: var(--white); }
.about-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 60px; align-items: start; }
.about-desc { color: #374151; margin-bottom: 16px; font-size: 1.18rem; }
.about-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 32px; }
.stat { text-align: center; padding: 20px 12px; background: var(--light); border-radius: 12px; }
.stat-num { display: block; font-size: 2.4rem; font-weight: 800; color: var(--primary); }
.stat-label { font-size: .98rem; color: var(--gray); }
.about-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.info-card {
  background: var(--light); padding: 20px 24px; border-radius: 12px;
  border-left: 4px solid var(--primary);
}
.info-card h4 { font-size: 1rem; color: var(--gray); margin-bottom: 6px; font-weight: 500; }
.info-card p { font-weight: 600; }

/* === 产品中心 === */
.products { background: var(--light); }
.products-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
.product-card-link { display: block; text-decoration: none; color: inherit; }
.product-card {
  background: var(--white); border-radius: 16px; padding: 32px 28px;
  transition: all .3s; border: 1px solid var(--border);
}
.product-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: var(--accent); }
.product-icon { font-size: 3.6rem; margin-bottom: 20px; }
.product-card h3 { font-size: 1.45rem; margin-bottom: 12px; }
.product-card p { color: var(--gray); font-size: 1.08rem; margin-bottom: 16px; }
.product-features { list-style: none; }
.product-features li {
  padding: 6px 0; font-size: .98rem; color: #4b5563;
  border-top: 1px solid var(--border);
}
.product-features li::before { content: '✓ '; color: var(--accent); font-weight: 700; }

/* === 服务范围 === */
.services { background: var(--white); }
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.service-item {
  padding: 36px 28px; background: var(--light); border-radius: 14px;
  border-top: 4px solid var(--primary); transition: transform .3s;
}
.service-item:hover { transform: translateY(-4px); }
.service-num { font-size: .9rem; font-weight: 700; color: var(--primary); letter-spacing: 1px; }
.service-item h3 { font-size: 1.4rem; margin: 12px 0 10px; }
.service-item p { color: var(--gray); font-size: 1.08rem; }

/* === 荣誉资质 === */
.honors { background: linear-gradient(135deg, #1e3a5f, #1a56db); color: white; }
.honors .section-tag { color: #67e8f9; }
.honors .section-header h2 { color: white; }
.honors-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.honor-card {
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.15);
  border-radius: 14px; padding: 32px 24px; text-align: center; transition: transform .3s;
}
.honor-card:hover { transform: translateY(-6px); background: rgba(255,255,255,.12); }
.honor-icon { font-size: 2.5rem; margin-bottom: 16px; }
.honor-card h4 { font-size: 1.1rem; margin-bottom: 8px; }
.honor-card p { font-size: .98rem; opacity: .7; }

/* === 联系我们 === */
.contact { background: var(--white); }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
.contact-info h2 { font-size: 2.4rem; margin-bottom: 16px; }
.contact-desc { color: var(--gray); margin-bottom: 36px; font-size: 1.18rem; }
.contact-detail { display: flex; flex-direction: column; gap: 24px; }
.contact-item { display: flex; gap: 16px; align-items: flex-start; }
.contact-icon { font-size: 1.8rem; }
.contact-item h4 { font-size: 1rem; color: var(--gray); font-weight: 500; margin-bottom: 4px; }
.contact-item p { font-weight: 600; }

.contact-form {
  background: var(--light); border-radius: 16px; padding: 40px;
  border: 1px solid var(--border);
}
.contact-form h3 { font-size: 1.4rem; margin-bottom: 28px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 8px; font-size: 1rem; }
.form-group input, .form-group textarea {
  width: 100%; padding: 12px 16px; border: 1px solid var(--border);
  border-radius: 8px; font-size: 1.12rem; font-family: inherit; transition: border-color .2s;
}
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--primary); }
#formSuccess {
  display: none; text-align: center; padding: 24px; color: #059669; font-weight: 600;
}

/* === 页脚 === */
.footer { background: #111827; color: #9ca3af; padding: 60px 0 30px; }
.footer-inner { display: flex; flex-direction: column; align-items: center; text-align: center; gap: 24px; }
.footer-brand .logo { display: flex; align-items: center; gap: 10px; color: white; font-size: 1.3rem; font-weight: 700; margin-bottom: 8px; }
.footer-links { display: flex; gap: 32px; flex-wrap: wrap; justify-content: center; }
.footer-links a { color: #9ca3af; transition: color .2s; }
.footer-links a:hover { color: white; }
.footer-copy { border-top: 1px solid #374151; padding-top: 24px; font-size: .98rem; }

/* === 响应式 === */
@media (max-width: 1024px) {
  .hero-content { grid-template-columns: 1fr; text-align: center; }
  .hero h1 { font-size: 2.6rem; }
  .hero-buttons { justify-content: center; }
  .hero-badge { margin: 0 auto; }
  .about-grid { grid-template-columns: 1fr; }
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .honors-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .about-stats { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .nav-links { display: none; }
  .hero { padding: 130px 0 60px; }
  .hero h1 { font-size: 1.7rem; }
  .products-grid, .services-grid, .honors-grid { grid-template-columns: 1fr; }
  .about-stats { grid-template-columns: repeat(2, 1fr); }
  .footer-links { flex-direction: column; gap: 12px; }
}