:root {
  --primary: #1a5cb5;
  --primary-dark: #0e3d7a;
  --primary-light: #e8f0fe;
  --accent: #e8362a;
  --text: #333;
  --text-light: #666;
  --text-lighter: #999;
  --bg: #fff;
  --bg-light: #f5f7fa;
  --bg-dark: #1a2332;
  --border: #e5e5e5;
  --shadow: 0 2px 12px rgba(0,0,0,.08);
  --shadow-lg: 0 8px 30px rgba(0,0,0,.12);
  --radius: 8px;
  --radius-lg: 16px;
  --max-width: 1200px;
  --header-height: 72px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  line-height: 1.7;
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; transition: color .2s; }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; }
.logo img { height: auto; display: block; }
ul, ol { list-style: none; }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,.97); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow .3s;
}
.site-header.scrolled { box-shadow: var(--shadow); }
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: var(--header-height);
}
.logo { display: flex; align-items: center; gap: 10px; font-size: 1.4rem; font-weight: 700; color: var(--primary-dark); }
.logo img { height: 50px; width: auto; max-width: 280px; }

.nav-list { display: flex; gap: 4px; }
.nav-list a {
  display: block; padding: 8px 16px; font-size: .95rem; color: var(--text);
  border-radius: var(--radius); transition: all .2s;
}
.nav-list a:hover, .nav-list a.active { color: var(--primary); background: var(--primary-light); }

.mobile-toggle { display: none; background: none; border: none; font-size: 1.5rem; cursor: pointer; color: var(--text); padding: 8px; }

/* Hero */
.hero {
  position: relative; min-height: 600px; display: flex; align-items: center;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, #2d7ce8 100%);
  color: #fff; overflow: hidden; margin-top: var(--header-height);
}
.hero::before {
  content: ''; position: absolute; inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.hero-content { position: relative; z-index: 1; max-width: var(--max-width); margin: 0 auto; padding: 80px 20px; }
.hero h1 { font-size: 2.8rem; font-weight: 800; line-height: 1.3; margin-bottom: 20px; }
.hero h1 span { display: inline; background: rgba(255,255,255,.15); padding: 2px 12px; border-radius: 4px; }
.hero p { font-size: 1.2rem; opacity: .9; max-width: 600px; margin-bottom: 32px; line-height: 1.8; }
.hero-badges { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 32px; }
.hero-badge { display: inline-flex; align-items: center; gap: 6px; background: rgba(255,255,255,.15); padding: 6px 16px; border-radius: 20px; font-size: .9rem; }
.btn-group { display: flex; gap: 16px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px; border-radius: var(--radius); font-size: 1rem; font-weight: 600;
  border: none; cursor: pointer; transition: all .3s; text-decoration: none;
}
.btn-primary { background: #fff; color: var(--primary); }
.btn-primary:hover { background: var(--primary-light); color: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 4px 15px rgba(0,0,0,.2); }
.btn-outline { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,.4); }
.btn-outline:hover { background: rgba(255,255,255,.1); border-color: #fff; }
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: #c9291e; transform: translateY(-2px); }

/* Stats */
.stats-bar {
  background: var(--bg-dark); color: #fff; padding: 40px 0;
}
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; text-align: center;
}
.stat-item h3 { font-size: 2.4rem; font-weight: 800; color: #4da3ff; }
.stat-item h3 small { font-size: 1rem; font-weight: 400; }
.stat-item p { font-size: .9rem; color: rgba(255,255,255,.7); margin-top: 4px; }

/* Section */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-light); }
.section-header { text-align: center; margin-bottom: 48px; }
.section-header h2 { font-size: 2rem; font-weight: 700; color: var(--text); margin-bottom: 12px; }
.section-header p { color: var(--text-light); max-width: 600px; margin: 0 auto; font-size: 1.05rem; }
.section-header .underline { width: 60px; height: 3px; background: var(--primary); margin: 16px auto 0; border-radius: 2px; }

/* Products */
.products-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.product-card {
  background: var(--bg); border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid var(--border); transition: all .3s;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--primary); }
.product-thumb {
  height: 200px; background: linear-gradient(135deg, var(--primary-light), #d6e4f7);
  display: flex; align-items: center; justify-content: center; position: relative; overflow: hidden;
}
.product-thumb .icon { font-size: 3rem; color: var(--primary); }
.product-thumb img { width: 100%; height: 100%; object-fit: cover; }
.product-body { padding: 24px; }
.product-body h3 { font-size: 1.15rem; margin-bottom: 8px; font-weight: 600; }
.product-body p { color: var(--text-light); font-size: .92rem; line-height: 1.6; }
.product-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }
.product-tags span { background: var(--primary-light); color: var(--primary); padding: 2px 10px; border-radius: 12px; font-size: .8rem; }

/* Features */
.features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.feature-item {
  text-align: center; padding: 32px 20px; background: var(--bg);
  border-radius: var(--radius-lg); border: 1px solid var(--border); transition: all .3s;
}
.feature-item:hover { border-color: var(--primary); box-shadow: var(--shadow); }
.feature-icon {
  width: 64px; height: 64px; margin: 0 auto 16px; background: var(--primary-light);
  border-radius: 16px; display: flex; align-items: center; justify-content: center;
  font-size: 1.8rem; color: var(--primary);
}
.feature-item h3 { font-size: 1.05rem; margin-bottom: 8px; }
.feature-item p { font-size: .88rem; color: var(--text-light); }

/* About Preview */
.about-preview { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.about-text h2 { font-size: 2rem; margin-bottom: 16px; }
.about-text p { color: var(--text-light); margin-bottom: 16px; line-height: 1.8; }
.about-highlights { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 24px; }
.about-highlight {
  display: flex; gap: 12px; align-items: flex-start; padding: 16px;
  background: var(--primary-light); border-radius: var(--radius);
}
.about-highlight .num { font-size: 1.5rem; font-weight: 800; color: var(--primary); white-space: nowrap; }
.about-highlight .label { font-size: .88rem; color: var(--text-light); }
.about-image {
  position: relative; border-radius: var(--radius-lg); overflow: hidden;
  background: linear-gradient(135deg, var(--primary-light), #d6e4f7);
  min-height: 400px; display: flex; align-items: center; justify-content: center;
}
.about-image .placeholder { font-size: 4rem; color: var(--primary); opacity: .5; }

/* News */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card {
  background: var(--bg); border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid var(--border); transition: all .3s;
}
.news-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
.news-thumb {
  height: 180px; background: linear-gradient(135deg, #667eea, #764ba2);
  display: flex; align-items: center; justify-content: center; color: #fff; font-size: .9rem;
}
.news-body { padding: 20px; }
.news-meta { display: flex; gap: 12px; font-size: .82rem; color: var(--text-lighter); margin-bottom: 8px; }
.news-body h3 { font-size: 1.05rem; margin-bottom: 8px; line-height: 1.5; }
.news-body h3 a { color: var(--text); }
.news-body h3 a:hover { color: var(--primary); }
.news-body p { font-size: .88rem; color: var(--text-light); line-height: 1.6; }

/* FAQ (GEO Optimized) */
.faq-section { background: var(--bg-light); }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { background: var(--bg); border-radius: var(--radius); margin-bottom: 12px; border: 1px solid var(--border); overflow: hidden; }
.faq-question {
  display: flex; justify-content: space-between; align-items: center;
  padding: 18px 24px; cursor: pointer; font-weight: 600; font-size: 1rem;
  transition: background .2s;
}
.faq-question:hover { background: var(--primary-light); }
.faq-question .arrow { transition: transform .3s; font-size: .8rem; color: var(--primary); }
.faq-item.open .faq-question .arrow { transform: rotate(180deg); }
.faq-answer { padding: 0 24px 18px; color: var(--text-light); line-height: 1.8; font-size: .95rem; display: none; }
.faq-item.open .faq-answer { display: block; }

/* CTA */
.cta-section {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: #fff; padding: 60px 0; text-align: center;
}
.cta-section h2 { font-size: 1.8rem; margin-bottom: 12px; }
.cta-section p { opacity: .85; margin-bottom: 24px; font-size: 1.05rem; }

/* Footer */
.site-footer { background: var(--bg-dark); color: rgba(255,255,255,.7); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
.footer-brand h3 { color: #fff; font-size: 1.3rem; margin-bottom: 12px; }
.footer-brand p { font-size: .9rem; line-height: 1.7; }
.footer-col h4 { color: #fff; margin-bottom: 16px; font-size: 1rem; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul a { color: rgba(255,255,255,.6); font-size: .9rem; transition: color .2s; }
.footer-col ul a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); margin-top: 40px; padding: 20px 0; text-align: center; font-size: .85rem; }

/* Page Banner */
.page-banner {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: #fff; padding: 60px 0 40px; margin-top: var(--header-height); text-align: center;
}
.page-banner h1 { font-size: 2rem; margin-bottom: 8px; }
.page-banner .breadcrumb { font-size: .9rem; opacity: .8; }
.page-banner .breadcrumb a { color: rgba(255,255,255,.8); }
.page-banner .breadcrumb a:hover { color: #fff; }

/* Content Pages */
.content-section { padding: 60px 0; }
.content-grid { display: grid; grid-template-columns: 1fr 300px; gap: 40px; }
.sidebar .widget { background: var(--bg-light); border-radius: var(--radius); padding: 20px; margin-bottom: 20px; }
.sidebar .widget h3 { font-size: 1rem; margin-bottom: 12px; padding-bottom: 10px; border-bottom: 2px solid var(--primary); }
.sidebar .widget ul li { margin-bottom: 8px; }
.sidebar .widget ul a { color: var(--text-light); font-size: .9rem; }
.sidebar .widget ul a:hover { color: var(--primary); }
.sidebar .widget ul a.active { color: var(--primary); font-weight: 600; }

/* About Page */
.timeline { position: relative; padding-left: 30px; }
.timeline::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--primary-light); }
.timeline-item { position: relative; margin-bottom: 32px; padding-left: 24px; }
.timeline-item::before { content: ''; position: absolute; left: -34px; top: 6px; width: 12px; height: 12px; background: var(--primary); border-radius: 50%; border: 3px solid var(--primary-light); }
.timeline-item h3 { color: var(--primary); font-size: 1rem; margin-bottom: 4px; }
.timeline-item p { font-size: .9rem; color: var(--text-light); line-height: 1.6; }

.honor-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.honor-item {
  text-align: center; padding: 24px; background: var(--bg);
  border-radius: var(--radius); border: 1px solid var(--border);
}
.honor-item .icon { font-size: 2rem; margin-bottom: 8px; }
.honor-item h4 { font-size: .9rem; color: var(--text); }

/* Solutions */
.solution-card {
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center;
  padding: 40px; background: var(--bg); border-radius: var(--radius-lg);
  border: 1px solid var(--border); margin-bottom: 32px;
}
.solution-card:nth-child(even) { direction: rtl; }
.solution-card:nth-child(even) > * { direction: ltr; }
.solution-card .thumb {
  height: 260px; background: linear-gradient(135deg, var(--primary-light), #d6e4f7);
  border-radius: var(--radius); display: flex; align-items: center; justify-content: center;
  font-size: 3rem; color: var(--primary); overflow: hidden;
}
.solution-card .thumb img { width: 100%; height: 100%; object-fit: cover; border-radius: var(--radius); }
.solution-card h3 { font-size: 1.3rem; margin-bottom: 12px; color: var(--primary-dark); }
.solution-card p { color: var(--text-light); line-height: 1.8; margin-bottom: 16px; }
.solution-features { list-style: none; }
.solution-features li { padding: 4px 0; font-size: .9rem; color: var(--text-light); }
.solution-features li::before { content: '✓'; color: var(--primary); margin-right: 8px; font-weight: 700; }

/* Cases */
.cases-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card {
  background: var(--bg); border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid var(--border); transition: all .3s;
}
.case-card:hover { box-shadow: var(--shadow); }
.case-thumb {
  height: 200px; background: linear-gradient(135deg, #11998e, #38ef7d);
  display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 600;
}
.case-body { padding: 20px; }
.case-body h3 { font-size: 1.05rem; margin-bottom: 8px; }
.case-body p { font-size: .88rem; color: var(--text-light); }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.contact-info-list { list-style: none; }
.contact-info-list li { display: flex; gap: 16px; align-items: flex-start; margin-bottom: 24px; }
.contact-info-list .ci-icon {
  width: 48px; height: 48px; background: var(--primary-light); border-radius: 12px;
  display: flex; align-items: center; justify-content: center; font-size: 1.2rem; color: var(--primary); flex-shrink: 0;
}
.contact-info-list .ci-label { font-size: .85rem; color: var(--text-lighter); }
.contact-info-list .ci-value { font-size: 1rem; font-weight: 500; }

.contact-form { background: var(--bg-light); padding: 32px; border-radius: var(--radius-lg); }
.contact-form h3 { margin-bottom: 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: .9rem; font-weight: 500; margin-bottom: 6px; }
.form-group input, .form-group textarea, .form-group select {
  width: 100%; padding: 12px 16px; border: 1px solid var(--border);
  border-radius: var(--radius); font-size: .95rem; font-family: inherit;
  transition: border-color .2s;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,92,181,.1);
}
.form-group textarea { min-height: 120px; resize: vertical; }

/* News List */
.news-list-item {
  display: flex; gap: 24px; padding: 24px; background: var(--bg);
  border-radius: var(--radius); border: 1px solid var(--border); margin-bottom: 16px;
  transition: all .3s;
}
.news-list-item:hover { box-shadow: var(--shadow); }
.news-list-thumb {
  width: 200px; height: 140px; flex-shrink: 0;
  background: linear-gradient(135deg, #667eea, #764ba2);
  border-radius: var(--radius); display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: .85rem;
}
.news-list-body { flex: 1; }
.news-list-body h3 { font-size: 1.1rem; margin-bottom: 8px; }
.news-list-body h3 a { color: var(--text); }
.news-list-body h3 a:hover { color: var(--primary); }
.news-list-body p { font-size: .9rem; color: var(--text-light); line-height: 1.6; margin-bottom: 8px; }
.news-list-body .meta { font-size: .82rem; color: var(--text-lighter); }

/* Pagination */
.pagination { display: flex; gap: 8px; justify-content: center; margin-top: 32px; }
.pagination a, .pagination span {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: var(--radius);
  border: 1px solid var(--border); font-size: .9rem; color: var(--text-light);
}
.pagination a:hover { border-color: var(--primary); color: var(--primary); }
.pagination .active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* Breadcrumb Schema */
.breadcrumb-schema { display: none; }

/* Responsive */
@media (max-width: 1024px) {
  .products-grid, .news-grid, .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .honor-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --header-height: 60px; }
  .mobile-toggle { display: block; }
  .nav-list {
    display: none; position: absolute; top: var(--header-height); left: 0; right: 0;
    background: var(--bg); flex-direction: column; padding: 16px;
    border-bottom: 1px solid var(--border); box-shadow: var(--shadow);
  }
  .nav-list.active { display: flex; }
  .hero { min-height: auto; }
  .hero-content { padding: 60px 20px; }
  .hero h1 { font-size: 1.8rem; }
  .hero p { font-size: 1rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .stat-item h3 { font-size: 1.8rem; }
  .products-grid, .news-grid, .cases-grid, .features-grid { grid-template-columns: 1fr; }
  .about-preview { grid-template-columns: 1fr; }
  .content-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .solution-card { grid-template-columns: 1fr; }
  .solution-card:nth-child(even) { direction: ltr; }
  .footer-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .news-list-item { flex-direction: column; }
  .news-list-thumb { width: 100%; height: 180px; }
  .honor-grid { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 48px 0; }
  .section-header h2 { font-size: 1.5rem; }
}