/* ========================================
   简行科技 - 全局样式
   重庆简行科技有限公司 | cqjxtech.com
   ======================================== */

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #1a56db;
  --primary-dark: #1e40af;
  --primary-light: #dbeafe;
  --text: #1e293b;
  --text-light: #64748b;
  --bg: #ffffff;
  --bg-light: #f8fafc;
  --bg-card: #ffffff;
  --border: #e2e8f0;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,.08), 0 2px 4px -2px rgba(0,0,0,.05);
  --transition: 0.2s ease;
  --max-width: 1200px;
}

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

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

a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }

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

ul { list-style: none; }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* --- Header --- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.logo { display: flex; align-items: center; gap: 10px; }
.logo img { height: 36px; width: auto; }
.logo span {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: .5px;
}

.nav { display: flex; gap: 32px; }
.nav a {
  color: var(--text-light);
  font-size: .95rem;
  font-weight: 500;
  padding: 8px 0;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}
.nav a:hover,
.nav a.active { color: var(--primary); border-bottom-color: var(--primary); }

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}
.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* --- Hero --- */
.hero {
  background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #1a56db 100%);
  color: #fff;
  padding: 96px 0 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(59,130,246,.15) 0%, transparent 70%);
  border-radius: 50%;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(59,130,246,.1) 0%, transparent 70%);
  border-radius: 50%;
}
.hero .container { position: relative; z-index: 1; }
.hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  letter-spacing: 1px;
  margin-bottom: 16px;
}
.hero .slogan {
  font-size: 1.2rem;
  color: rgba(255,255,255,.8);
  margin-bottom: 32px;
  font-weight: 300;
}
.hero .tagline {
  font-size: 1.05rem;
  color: rgba(255,255,255,.65);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.8;
}

/* --- Page Banner (内页) --- */
.page-banner {
  background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 100%);
  color: #fff;
  padding: 60px 0;
  text-align: center;
}
.page-banner h1 { font-size: 2rem; font-weight: 700; margin-bottom: 8px; }
.page-banner p { color: rgba(255,255,255,.7); font-size: .95rem; }

/* --- Sections --- */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-light); }

.section-title {
  text-align: center;
  margin-bottom: 48px;
}
.section-title h2 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.section-title p {
  color: var(--text-light);
  font-size: .95rem;
}

/* --- Cards --- */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: transform var(--transition), box-shadow var(--transition);
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.card-icon {
  width: 48px;
  height: 48px;
  background: var(--primary-light);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.4rem;
}
.card h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 10px; }
.card p { color: var(--text-light); font-size: .9rem; line-height: 1.7; }

/* --- Info Grid (关于我们) --- */
.info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.info-grid h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: 16px; color: var(--primary); }
.info-grid p { color: var(--text-light); line-height: 1.8; margin-bottom: 12px; }

/* --- Timeline / Team --- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.team-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  transition: transform var(--transition);
}
.team-card:hover { transform: translateY(-2px); }
.team-card .avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 1.5rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}
.team-card h4 { font-size: 1.05rem; font-weight: 600; margin-bottom: 4px; }
.team-card .role { color: var(--primary); font-size: .85rem; margin-bottom: 8px; }
.team-card .desc { color: var(--text-light); font-size: .85rem; line-height: 1.6; }

/* --- Stats --- */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 24px;
  margin-top: 48px;
}
.stat {
  text-align: center;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.stat .num { font-size: 2rem; font-weight: 800; color: var(--primary); }
.stat .label { font-size: .85rem; color: var(--text-light); margin-top: 4px; }

/* --- Cases Page --- */
.case-filters {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 36px;
}
.case-filter {
  padding: 8px 20px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--bg);
  color: var(--text-light);
  font-size: .9rem;
  cursor: pointer;
  transition: all var(--transition);
}
.case-filter:hover { border-color: var(--primary); color: var(--primary); }
.case-filter.active { background: var(--primary); color: #fff; border-color: var(--primary); }

.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}
.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}
.case-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.case-card .case-body { padding: 24px; }
.case-card .case-tag {
  display: inline-block;
  padding: 3px 10px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 12px;
  font-size: .75rem;
  font-weight: 500;
  margin-bottom: 10px;
}
.case-card h3 { font-size: 1rem; font-weight: 600; margin-bottom: 6px; }
.case-card .case-client { color: var(--text-light); font-size: .85rem; margin-bottom: 8px; }
.case-card .case-desc { color: var(--text-light); font-size: .85rem; line-height: 1.6; }

/* --- Product Cards --- */
.product-category { margin-bottom: 56px; }
.product-category h3 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary-light);
}

.product-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.product-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: var(--transition);
}
.product-item:hover { border-color: var(--primary); }
.product-item h4 { font-size: 1rem; font-weight: 600; margin-bottom: 8px; }
.product-item p { color: var(--text-light); font-size: .85rem; line-height: 1.6; }

/* --- Contact --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.contact-info h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 24px;
}
.contact-item {
  display: flex;
  gap: 16px;
  margin-bottom: 20px;
  align-items: flex-start;
}
.contact-item .ci-icon {
  width: 40px;
  height: 40px;
  background: var(--primary-light);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.contact-item .ci-text h4 { font-size: .95rem; font-weight: 600; margin-bottom: 2px; }
.contact-item .ci-text p { color: var(--text-light); font-size: .9rem; }

.contact-qrcode {
  text-align: center;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.contact-qrcode .qr-placeholder {
  width: 140px;
  height: 140px;
  margin: 0 auto 12px;
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  font-size: .8rem;
}

/* --- Footer --- */
.footer {
  background: #0f172a;
  color: rgba(255,255,255,.7);
  padding: 48px 0 24px;
  font-size: .9rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 32px;
}
.footer h4 { color: #fff; font-size: 1rem; font-weight: 600; margin-bottom: 16px; }
.footer p { line-height: 1.8; margin-bottom: 6px; }
.footer a { color: rgba(255,255,255,.7); }
.footer a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 20px;
  text-align: center;
  font-size: .8rem;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .hero h1 { font-size: 2rem; }
  .hero { padding: 64px 0 56px; }

  .nav { display: none; }
  .nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
    gap: 8px;
    box-shadow: var(--shadow-md);
  }
  .nav.open a { border: none; padding: 10px 0; }

  .menu-toggle { display: flex; }

  .info-grid,
  .contact-grid,
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }

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

  .section { padding: 48px 0; }
  .section-title { margin-bottom: 32px; }
}