:root {
  --primary: #1a73e8;
  --primary-dark: #1557b0;
  --secondary: #34a853;
  --dark: #1a1a2e;
  --gray: #f5f7fa;
  --text: #333;
  --text-light: #666;
  --radius: 12px;
  --shadow: 0 4px 20px rgba(0,0,0,.08);
}
* { margin:0; padding:0; box-sizing:border-box; }
body { font-family: -apple-system, "Microsoft YaHei", "PingFang SC", sans-serif; color: var(--text); line-height: 1.8; }
a { color: var(--primary); text-decoration: none; transition: .2s; }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header { background: #fff; box-shadow: 0 2px 10px rgba(0,0,0,.06); position: sticky; top: 0; z-index: 100; }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.logo { font-size: 1.4rem; font-weight: 700; color: var(--primary); }
.logo span { color: var(--secondary); }
.nav { display: flex; gap: 28px; list-style: none; }
.nav a { color: var(--text); font-size: .95rem; font-weight: 500; padding: 6px 0; border-bottom: 2px solid transparent; }
.nav a:hover, .nav a.active { color: var(--primary); border-bottom-color: var(--primary); }
.header-phone { background: var(--primary); color: #fff; padding: 8px 20px; border-radius: 20px; font-weight: 600; font-size: .9rem; }
.header-phone:hover { background: var(--primary-dark); color: #fff; }
.menu-toggle { display: none; background: none; border: none; font-size: 1.5rem; cursor: pointer; }

/* Hero */
.hero { position: relative; min-height: 480px; display: flex; align-items: center; background: linear-gradient(135deg, var(--dark) 0%, #16213e 100%); overflow: hidden; }
.hero-bg { position: absolute; inset: 0; opacity: .3; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; }
.hero-content { position: relative; z-index: 2; color: #fff; padding: 80px 0; }
.hero-content h1 { font-size: 2.6rem; margin-bottom: 16px; line-height: 1.3; }
.hero-content p { font-size: 1.15rem; opacity: .9; max-width: 600px; margin-bottom: 30px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 30px; }
.hero-tags span { background: rgba(255,255,255,.15); border: 1px solid rgba(255,255,255,.3); padding: 6px 16px; border-radius: 20px; font-size: .85rem; }
.btn { display: inline-block; padding: 14px 36px; border-radius: 8px; font-weight: 600; font-size: 1rem; transition: .3s; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); }
.btn-outline { border: 2px solid #fff; color: #fff; margin-left: 12px; }
.btn-outline:hover { background: #fff; color: var(--dark); }

/* Sections */
.section { padding: 70px 0; }
.section-alt { background: var(--gray); }
.section-title { text-align: center; margin-bottom: 50px; }
.section-title h2 { font-size: 2rem; color: var(--dark); margin-bottom: 10px; }
.section-title p { color: var(--text-light); font-size: 1.05rem; }

/* Service Cards */
.service-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 28px; }
.service-card { background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: .3s; }
.service-card:hover { transform: translateY(-6px); box-shadow: 0 12px 30px rgba(0,0,0,.12); }
.service-card img { height: 200px; width: 100%; object-fit: cover; }
.service-card-body { padding: 24px; }
.service-card-body h3 { font-size: 1.2rem; margin-bottom: 10px; color: var(--dark); }
.service-card-body p { color: var(--text-light); font-size: .92rem; margin-bottom: 16px; }
.service-card-body a { font-weight: 600; font-size: .9rem; }

/* Process */
.process-steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 20px; }
.step { text-align: center; padding: 24px 12px; background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); }
.step-num { width: 44px; height: 44px; background: var(--primary); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 1.1rem; margin: 0 auto 12px; }
.step h4 { font-size: .95rem; margin-bottom: 6px; }
.step p { font-size: .82rem; color: var(--text-light); }

/* Why Us */
.why-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
.why-item { display: flex; gap: 14px; padding: 20px; background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); }
.why-icon { width: 44px; height: 44px; background: linear-gradient(135deg, var(--primary), var(--secondary)); border-radius: 10px; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 1.2rem; flex-shrink: 0; }
.why-item h4 { font-size: .95rem; margin-bottom: 4px; }
.why-item p { font-size: .85rem; color: var(--text-light); }

/* CTA */
.cta-section { background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%); padding: 60px 0; text-align: center; color: #fff; }
.cta-section h2 { font-size: 1.8rem; margin-bottom: 12px; }
.cta-section p { opacity: .9; margin-bottom: 24px; font-size: 1.05rem; }
.cta-phone { font-size: 2rem; font-weight: 700; color: #fff; display: block; margin-bottom: 8px; }
.cta-phone:hover { color: #fff; opacity: .9; }

/* Page Hero (inner pages) */
.page-hero { background: linear-gradient(135deg, var(--dark) 0%, #16213e 100%); padding: 60px 0 50px; color: #fff; }
.page-hero h1 { font-size: 2rem; margin-bottom: 10px; }
.page-hero p { opacity: .85; font-size: 1rem; }
.breadcrumb { margin-bottom: 16px; font-size: .85rem; opacity: .7; }
.breadcrumb a { color: #fff; }

/* Detail Content */
.detail-section { padding: 50px 0; }
.detail-img { border-radius: var(--radius); overflow: hidden; margin-bottom: 30px; box-shadow: var(--shadow); }
.detail-img img { width: 100%; height: 320px; object-fit: cover; }
.scope-list { list-style: none; display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 12px; margin: 20px 0; }
.scope-list li { padding: 12px 16px; background: var(--gray); border-radius: 8px; border-left: 3px solid var(--primary); font-size: .92rem; }
.faq-section { margin-top: 40px; }
.faq-item { margin-bottom: 24px; padding: 24px; background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); }
.faq-item h3 { font-size: 1rem; color: var(--primary); margin-bottom: 10px; }
.faq-item p { font-size: .92rem; color: var(--text-light); }

/* Related */
.related-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-top: 30px; }
.related-card { padding: 20px; background: var(--gray); border-radius: var(--radius); text-align: center; transition: .3s; }
.related-card:hover { background: var(--primary); }
.related-card:hover a { color: #fff; }
.related-card a { font-weight: 600; font-size: .92rem; color: var(--dark); }

/* News */
.news-list { display: grid; gap: 24px; }
.news-item { display: flex; gap: 20px; padding: 24px; background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); transition: .3s; }
.news-item:hover { transform: translateX(6px); }
.news-date { min-width: 70px; text-align: center; padding-top: 4px; }
.news-date .day { font-size: 1.8rem; font-weight: 700; color: var(--primary); }
.news-date .month { font-size: .8rem; color: var(--text-light); }
.news-item h3 { font-size: 1.05rem; margin-bottom: 8px; }
.news-item p { font-size: .88rem; color: var(--text-light); }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.contact-info h3 { margin-bottom: 20px; }
.contact-info-item { display: flex; gap: 12px; margin-bottom: 16px; font-size: .95rem; }
.contact-info-item .label { font-weight: 600; min-width: 80px; color: var(--dark); }
.map-placeholder { background: var(--gray); border-radius: var(--radius); height: 300px; display: flex; align-items: center; justify-content: center; color: var(--text-light); }

/* Footer */
.site-footer { background: var(--dark); color: rgba(255,255,255,.8); padding: 50px 0 20px; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 30px; margin-bottom: 30px; }
.footer-col h4 { color: #fff; margin-bottom: 16px; font-size: 1rem; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 8px; }
.footer-col a { color: rgba(255,255,255,.7); font-size: .88rem; }
.footer-col a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding-top: 20px; text-align: center; font-size: .82rem; opacity: .6; }

/* Responsive */
@media (max-width: 768px) {
  .header-inner { height: 60px; }
  .nav { display: none; position: absolute; top: 60px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 20px; gap: 16px; box-shadow: 0 4px 12px rgba(0,0,0,.1); }
  .nav.active { display: flex; }
  .menu-toggle { display: block; }
  .header-phone { display: none; }
  .hero-content h1 { font-size: 1.8rem; }
  .hero { min-height: 380px; }
  .service-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
  .news-item { flex-direction: column; }
}