/* 上海彦安机电工程有限公司 - 企业官网样式 */
/* 风格：简约大气 */

:root {
  --primary: #1a365d;
  --primary-light: #2a4a7f;
  --accent: #e8a838;
  --accent-light: #f0c060;
  --bg: #fafafa;
  --bg-white: #ffffff;
  --text: #2d3748;
  --text-light: #718096;
  --border: #e2e8f0;
  --shadow: 0 4px 24px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.1);
  --radius: 8px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

/* ===== 导航 ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.navbar.scrolled {
  box-shadow: var(--shadow);
}
.nav-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 32px; height: 72px;
}
.nav-logo {
  display: flex; align-items: center; gap: 12px;
  font-size: 18px; font-weight: 700; color: var(--primary);
  text-decoration: none;
}
.nav-logo-img { height: 32px; width: auto; }
.nav-links { display: flex; gap: 8px; list-style: none; }
.nav-links a {
  text-decoration: none; color: var(--text);
  padding: 8px 18px; border-radius: 6px;
  font-size: 15px; font-weight: 500;
  transition: var(--transition);
}
.nav-links a:hover,
.nav-links a.active {
  background: var(--primary); color: #fff;
}
.nav-mobile-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-mobile-toggle span { display: block; width: 24px; height: 2px; background: var(--text); margin: 5px 0; transition: var(--transition); }

/* ===== 通用区块 ===== */
.section { padding: 100px 32px; }
.section-inner { max-width: 1200px; margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 64px; }
.section-tag {
  display: inline-block; padding: 6px 16px;
  background: rgba(26,54,93,0.06); color: var(--primary);
  border-radius: 20px; font-size: 13px; font-weight: 600;
  letter-spacing: 1px; margin-bottom: 16px;
}
.section-title {
  font-size: 36px; font-weight: 800; color: var(--primary);
  line-height: 1.3; margin-bottom: 16px;
}
.section-desc { font-size: 17px; color: var(--text-light); max-width: 600px; margin: 0 auto; }

/* ===== Hero ===== */
.hero {
  display: flex; align-items: center;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 50%, #1a5276 100%);
  color: #fff; position: relative; overflow: hidden;
  padding: 100px 32px 60px;
}
.hero::before {
  content: ''; position: absolute; top: -50%; right: -20%;
  width: 800px; height: 800px;
  background: radial-gradient(circle, rgba(232,168,56,0.15) 0%, transparent 70%);
  border-radius: 50%;
}
.hero-inner { max-width: 1200px; margin: 0 auto; position: relative; z-index: 1; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,0.1); backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.15);
  padding: 10px 24px; border-radius: 30px;
  font-size: 18px; font-weight: 600; margin-bottom: 32px;
}
.hero-badge-dot { width: 8px; height: 8px; background: var(--accent); border-radius: 50%; animation: pulse 2s infinite; }
.hero h1 { font-size: 56px; font-weight: 900; line-height: 1.2; margin-bottom: 20px; }
.hero h1 span { color: var(--accent); }
.hero-sub { font-size: 19px; color: rgba(255,255,255,0.75); max-width: 560px; margin-bottom: 32px; line-height: 1.8; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 30px; border-radius: 6px;
  font-size: 16px; font-weight: 600;
  text-decoration: none; transition: var(--transition);
  cursor: pointer; border: none;
}
.btn-primary { background: var(--accent); color: #1a365d; }
.btn-primary:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(232,168,56,0.3); }
.btn-outline { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.3); }
.btn-outline:hover { border-color: #fff; background: rgba(255,255,255,0.1); }
.hero-stats {
  display: flex; gap: 48px; margin-top: 48px; padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,0.15);
}
.hero-stat-num { font-size: 36px; font-weight: 900; color: var(--accent); }
.hero-stat-label { font-size: 14px; color: rgba(255,255,255,0.6); margin-top: 4px; }

/* ===== 业务领域 ===== */
.services { background: var(--bg-white); }
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.service-card {
  background: var(--bg); border-radius: var(--radius);
  padding: 40px 32px; transition: var(--transition);
  border: 1px solid transparent; position: relative; overflow: hidden;
}
.service-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 4px; background: var(--primary); transform: scaleX(0);
  transition: var(--transition); transform-origin: left;
}
.service-card:hover { border-color: var(--border); box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.service-card:hover::before { transform: scaleX(1); }
.service-icon {
  width: 56px; height: 56px; background: rgba(26,54,93,0.06);
  border-radius: 12px; display: flex; align-items: center; justify-content: center;
  font-size: 24px; margin-bottom: 24px;
}
.service-card h3 { font-size: 20px; font-weight: 700; color: var(--primary); margin-bottom: 12px; }
.service-card p { font-size: 15px; color: var(--text-light); line-height: 1.8; }

/* ===== 关于我们 ===== */
.about { background: var(--bg); }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.about-img {
  width: 100%; aspect-ratio: 4/3; overflow: hidden;
  border-radius: 12px; position: relative;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
}
.about-img img {
  width: 100%; height: 100%; object-fit: cover; display: block;
}
.about-text h3 { font-size: 28px; font-weight: 800; color: var(--primary); margin-bottom: 20px; line-height: 1.4; }
.about-text p { font-size: 16px; color: var(--text-light); margin-bottom: 16px; line-height: 1.9; }
.about-highlights { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 32px; }
.about-highlight {
  padding: 20px; background: var(--bg-white); border-radius: var(--radius);
  border: 1px solid var(--border);
}
.about-highlight-num { font-size: 28px; font-weight: 900; color: var(--primary); }
.about-highlight-label { font-size: 13px; color: var(--text-light); margin-top: 4px; }

/* ===== 项目案例 ===== */
.projects { background: var(--bg-white); }
.projects-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.project-card {
  border-radius: 12px; overflow: hidden; border: 1px solid var(--border);
  transition: var(--transition); background: var(--bg);
}
.project-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.project-img {
  height: 200px; background: linear-gradient(135deg, var(--primary) 0%, #2a4a7f 100%);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 48px;
}
.project-info { padding: 28px; }
.project-info h4 { font-size: 18px; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
.project-info p { font-size: 14px; color: var(--text-light); line-height: 1.7; }
.project-tag {
  display: inline-block; padding: 4px 12px; background: rgba(26,54,93,0.06);
  color: var(--primary); border-radius: 4px; font-size: 12px; font-weight: 600;
  margin-top: 12px;
}

/* ===== 资质认证 ===== */
.certs { background: var(--bg); }
.certs-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.cert-card {
  text-align: center; padding: 32px 20px; background: var(--bg-white);
  border-radius: var(--radius); border: 1px solid var(--border);
  transition: var(--transition);
}
.cert-card:hover { border-color: var(--primary); box-shadow: var(--shadow); }
.cert-icon { font-size: 36px; margin-bottom: 16px; }
.cert-card h4 { font-size: 15px; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
.cert-card p { font-size: 13px; color: var(--text-light); }

/* ===== 联系我们 ===== */
.contact { background: var(--bg-white); }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; }
.contact-info h3 { font-size: 28px; font-weight: 800; color: var(--primary); margin-bottom: 16px; }
.contact-info > p { font-size: 16px; color: var(--text-light); margin-bottom: 40px; line-height: 1.8; }
.contact-item {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 20px 0; border-bottom: 1px solid var(--border);
}
.contact-item-icon {
  width: 48px; height: 48px; background: rgba(26,54,93,0.06);
  border-radius: 10px; display: flex; align-items: center; justify-content: center;
  font-size: 20px; flex-shrink: 0;
}
.contact-item h4 { font-size: 15px; font-weight: 700; color: var(--primary); margin-bottom: 4px; }
.contact-item p { font-size: 14px; color: var(--text-light); }
.contact-form { background: var(--bg); padding: 40px; border-radius: 12px; }
.contact-form h4 { font-size: 20px; font-weight: 700; color: var(--primary); margin-bottom: 24px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 14px; font-weight: 600; color: var(--text); margin-bottom: 8px; }
.form-group input, .form-group textarea {
  width: 100%; padding: 12px 16px; border: 1px solid var(--border);
  border-radius: 6px; font-size: 15px; font-family: inherit;
  transition: var(--transition); background: #fff;
}
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,54,93,0.1); }
.form-group textarea { min-height: 120px; resize: vertical; }
.form-btn { width: 100%; }

/* ===== Footer ===== */
.footer {
  background: var(--primary); color: rgba(255,255,255,0.7);
  padding: 64px 32px 32px;
}
.footer-inner { max-width: 1200px; margin: 0 auto; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr 1fr; gap: 36px; margin-bottom: 48px; }
.footer-brand h4 { font-size: 20px; font-weight: 700; color: #fff; margin-bottom: 16px; }
.footer-brand p { font-size: 14px; line-height: 1.8; }
.footer-col h4 { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 20px; }
.footer-col a {
  display: block; text-decoration: none; color: rgba(255,255,255,0.6);
  font-size: 14px; padding: 6px 0; transition: var(--transition);
}
.footer-col a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px; display: flex; justify-content: space-between; align-items: center;
  font-size: 13px;
}
.footer-bottom a { color: rgba(255,255,255,0.6); text-decoration: none; }
.footer-bottom a:hover { color: var(--accent); }
.footer-qr { text-align: center; }
.footer-qr-img { width: 120px; height: 120px; border-radius: 8px; display: block; margin: 0 auto; border: 2px solid rgba(255,255,255,0.15); }
.footer-qr-text { display: block; font-size: 12px; color: rgba(255,255,255,0.5); margin-top: 8px; }

/* ===== 公众号浮窗 ===== */
.wx-float {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 999;
}
.wx-float-btn {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #07c160;
  color: #fff;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(7,193,96,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
  transition: var(--transition);
}
.wx-float-btn:hover { transform: scale(1.1); }
.wx-popup {
  position: absolute;
  bottom: 72px;
  right: 0;
  width: 260px;
  background: #fff;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  padding: 24px 20px 20px;
  text-align: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: var(--transition);
}
.wx-popup.open { opacity: 1; visibility: visible; transform: translateY(0); }
.wx-popup h4 { font-size: 15px; color: var(--primary); margin-bottom: 4px; }
.wx-popup .wx-popup-sub { font-size: 12px; color: var(--text-light); margin-bottom: 16px; }
.wx-popup img { width: 180px; height: 180px; object-fit: contain; margin: 0 auto; display: block; border-radius: 8px; }
.wx-popup .wx-popup-tip { font-size: 12px; color: var(--text-light); margin-top: 12px; }
.wx-popup-close {
  position: absolute; top: 8px; right: 12px;
  background: none; border: none; font-size: 18px; cursor: pointer; color: var(--text-light);
}
@media (max-width: 600px) {
  .wx-float { bottom: 20px; right: 20px; }
  .wx-popup { right: 0; width: 240px; }
}

/* ===== 动画 ===== */
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }
@keyframes fadeUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
.fade-up { opacity: 0; }
.fade-up.visible { animation: fadeUp 0.6s ease forwards; }

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .nav-links {
    flex-direction: column; position: absolute; top: 72px; left: 0; right: 0;
    background: #fff; padding: 16px; box-shadow: var(--shadow-lg);
    border-radius: 0 0 12px 12px;
    opacity: 0; visibility: hidden; transform: translateY(-8px);
    pointer-events: none; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }
  .nav-links.open {
    opacity: 1; visibility: visible; transform: translateY(0);
    pointer-events: auto;
  }
  .nav-mobile-toggle { display: block; }
  .hero h1 { font-size: 36px; }
  .hero-stats { flex-wrap: wrap; gap: 24px; }
  .services-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .projects-grid { grid-template-columns: 1fr; }
  .certs-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .section { padding: 64px 20px; }
  .section-title { font-size: 28px; }
}
@media (max-width: 600px) {
  .hero h1 { font-size: 28px; }
  .hero { padding: 100px 20px 60px; }
  .hero-sub { font-size: 15px; }
  .footer-grid { grid-template-columns: 1fr; }
  .certs-grid { grid-template-columns: 1fr; }
  .page-hero { padding: 100px 20px 50px; }
  .page-hero h1 { font-size: 26px; }
  .page-hero p { font-size: 15px; }
}