/* 百宽建站 - 仪器仪表行业版（深色科技风） */
:root {
  --primary: #0f172a;
  --primary-dark: #1e3a5f;
  --primary-light: #1e293b;
  --accent: #3b82f6;
  --bg: #0b1120;
  --surface: rgba(30, 41, 59, 0.85);
  --text: #e2e8f0;
  --text-secondary: #94a3b8;
  --radius: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --glass-bg: rgba(30, 41, 59, 0.7);
  --glass-border: rgba(59, 130, 246, 0.15);
  --blur: blur(20px);
}
* { margin:0; padding:0; box-sizing:border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans SC', sans-serif; color: var(--text); background: var(--bg); background-image: radial-gradient(circle at 50% 0%, rgba(59,130,246,0.08) 0%, transparent 50%), repeating-linear-gradient(0deg, transparent, transparent 40px, rgba(59,130,246,0.03) 40px, rgba(59,130,246,0.03) 41px); min-height: 100vh; line-height: 1.7; }
.navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(11,17,32,0.9); backdrop-filter: var(--blur); border-bottom: 1px solid rgba(59,130,246,0.1); padding: 0 2rem; }
.navbar-inner { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; height: 70px; }
.nav-logo { font-size:1.4rem; font-weight:700; color:var(--accent); text-decoration:none; display:flex; align-items:center; gap:0.5rem; }
.nav-logo img { height:36px; width:36px; border-radius:6px; object-fit:cover; }
.nav-links { display:flex; gap:1.8rem; list-style:none; align-items:center; }
.nav-links a { text-decoration:none; color:var(--text-secondary); font-weight:400; font-size:0.9rem; transition:color 0.3s; padding:0.4rem 0; position:relative; }
.nav-links a:hover, .nav-links a.active { color:var(--accent); }
.nav-links a::after { content:''; position:absolute; bottom:-2px; left:0; width:0; height:1px; background:var(--accent); transition:width 0.3s; }
.nav-links a:hover::after, .nav-links a.active::after { width:100%; }
.nav-toggle { display:none; background:none; border:none; color:var(--primary); font-size:1.5rem; cursor:pointer; padding:0.25rem; }
@media (max-width:768px) { .nav-toggle { display:flex; flex-direction:column; gap:5px; background:none; border:none; cursor:pointer; padding:8px; z-index:1001; } .nav-toggle span { display:block; width:24px; height:2px; background:var(--accent); border-radius:2px; transition:all 0.3s; } .nav-overlay { display:none; position:fixed; inset:0; background:rgba(0,0,0,0.6); backdrop-filter:blur(4px); -webkit-backdrop-filter:blur(4px); z-index:998; } .nav-overlay.active { display:block; } .nav-links { display:flex; flex-direction:column; position:fixed; top:0; right:-250px; width:250px; height:100vh; background:rgba(15,23,42,0.95); backdrop-filter:blur(16px); -webkit-backdrop-filter:blur(16px); z-index:999; padding:5rem 1.5rem 2rem; gap:0.25rem; transition:right 0.3s ease; box-shadow:-4px 0 24px rgba(0,0,0,0.3); overflow-y:auto; list-style:none; } .nav-links.active { right:0; } .nav-links li { width:100%; } .nav-links a { display:block; padding:0.8rem 1rem; border-radius:8px; font-size:0.95rem; color:#e2e8f0; text-decoration:none; transition:all 0.25s; border-left:2px solid transparent; } .nav-links a:hover, .nav-links a.active { background:rgba(59,130,246,0.1); color:var(--accent); border-left-color:var(--accent); } }
.section { max-width:1200px; margin:0 auto; padding:3.5rem 1.5rem; }
.section-title { text-align:center; margin-bottom:2.5rem; }
.section-title h2 { font-size:1.8rem; font-weight:700; color:#ffffff; margin-bottom:0.5rem; }
.section-title h2 span { color:var(--accent); }
.section-title .divider { width:50px; height:2px; background:var(--accent); margin:0 auto; }
.card { background:var(--glass-bg); backdrop-filter:var(--blur); border:1px solid var(--glass-border); border-radius:var(--radius); padding:1.5rem; box-shadow:var(--shadow); transition:transform 0.3s, box-shadow 0.3s; }
.card:hover { transform:translateY(-3px); box-shadow:0 6px 28px rgba(0,0,0,0.4); }
.card-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); gap:1.25rem; }
.card-image { width:100%; height:180px; object-fit:cover; border-radius:6px; margin-bottom:0.75rem; }
.card h3 { font-size:1.1rem; margin-bottom:0.4rem; color:#ffffff; }
.card p { color:rgba(255,255,255,0.8); font-size:0.9rem; line-height:1.7; }
.card .tag { display:inline-block; padding:0.2rem 0.6rem; background:rgba(59,130,246,0.15); color:var(--accent); border-radius:4px; font-size:0.75rem; font-weight:600; }
.cat-nav { display:flex; gap:0.75rem; overflow-x:auto; padding:0.5rem 0 0.75rem; margin-bottom:2.5rem; scrollbar-width:thin; scrollbar-color:var(--accent) transparent; }
.cat-nav::-webkit-scrollbar { height:4px; }
.cat-nav::-webkit-scrollbar-thumb { background:var(--accent); border-radius:4px; }
.cat-card-btn { flex-shrink:0; display:flex; align-items:center; gap:0.5rem; padding:0.6rem 1.3rem; border-radius:14px; border:1px solid var(--glass-border); background:var(--glass-bg); backdrop-filter:var(--blur); color:var(--text-secondary); cursor:pointer; font-size:0.88rem; font-weight:500; white-space:nowrap; transition:all 0.35s cubic-bezier(0.34,1.56,0.64,1); box-shadow:0 2px 12px rgba(0,0,0,0.08), inset 0 1px 0 rgba(255,255,255,0.08); position:relative; overflow:hidden; }
.cat-card-btn::before { content:''; position:absolute; inset:0; border-radius:14px; background:linear-gradient(135deg,rgba(255,255,255,0.1) 0%,transparent 50%); opacity:0; transition:opacity 0.35s; pointer-events:none; }
.cat-card-btn:hover { transform:translateY(-3px) scale(1.03); box-shadow:0 8px 32px rgba(37,99,235,0.12); border-color:var(--accent); background:rgba(37,99,235,0.06); color:var(--accent); }
.cat-card-btn:hover::before { opacity:1; }
.cat-card-btn.active { background:rgba(37,99,235,0.1); backdrop-filter:blur(12px); color:var(--accent); font-weight:600; border:1px solid var(--accent); box-shadow:0 4px 20px rgba(37,99,235,0.15), inset 0 1px 0 rgba(255,255,255,0.1); transform:translateY(-1px); letter-spacing:0.03em; }
.cat-btn-icon { font-size:1.1rem; line-height:1; }
.cat-btn-label { letter-spacing:0.03em; }
.about-section { display:grid; grid-template-columns:1fr 1fr; gap:3rem; align-items:center; }
.about-image { width:100%; border-radius:var(--radius); box-shadow:var(--shadow); }
.about-text h3 { font-size:1.5rem; margin-bottom:0.75rem; color:#ffffff; }
.about-text p { color:rgba(255,255,255,0.8); line-height:1.8; margin-bottom:0.75rem; }
.about-stats { display:grid; grid-template-columns:repeat(3,1fr); gap:1rem; margin-top:1.5rem; }
.stat-item { text-align:center; padding:1rem; background:rgba(59,130,246,0.08); border:1px solid rgba(59,130,246,0.1); border-radius:6px; }
.stat-number { font-size:1.3rem; font-weight:700; color:var(--accent); }
.stat-label { font-size:0.8rem; color:var(--text-secondary); }
.news-item { padding:1.25rem; border-bottom:1px solid rgba(59,130,246,0.08); display:flex; gap:1.25rem; }
.news-item:hover { background:rgba(59,130,246,0.03); }
.news-item img { width:180px; height:120px; object-fit:cover; border-radius:6px; flex-shrink:0; }
.news-item-content h3 { font-size:1rem; margin-bottom:0.4rem; color:#ffffff; }
.news-item-content .news-date { color:#60a5fa; font-size:0.8rem; font-weight:500; }
.news-item-content p { color:rgba(255,255,255,0.8); margin-top:0.4rem; font-size:0.9rem; }
.contact-grid { display:grid; grid-template-columns:1fr 1fr; gap:2rem; }
.contact-item { display:flex; gap:0.75rem; margin-bottom:0.75rem; align-items:flex-start; }
.contact-item .icon { font-size:1.3rem; width:36px; text-align:center; flex-shrink:0; }
.contact-item .label { font-weight:600; font-size:0.85rem; color:#ffffff; }
.contact-item .value { color:var(--text-secondary); font-size:0.85rem; }
.map-container { border-radius:var(--radius); overflow:hidden; height:250px; border:1px solid rgba(59,130,246,0.15); }
.footer { text-align:center; padding:2rem; color:var(--text-secondary); font-size:0.85rem; border-top:1px solid rgba(59,130,246,0.08); }
.footer a { color:var(--accent); text-decoration:none; }
@media (max-width:768px) {
  .about-section { grid-template-columns:1fr; }
  .about-image { max-width:160px; margin:0 auto 1.5rem auto; display:block; }
  .about-text { text-align:center; }
  .about-text h3 { text-align:center; }
  .about-stats { grid-template-columns:1fr; }
  .stat-item { padding:0.75rem; }
  .stat-number { font-size:1.1rem; }
  .contact-grid { grid-template-columns:1fr; }
  .news-item { flex-direction:column; }
  .news-item img { width:100%; height:180px; }
  .card-grid { grid-template-columns:1fr; }

  /* ===== 汉堡菜单 - 移动端 ===== */
  .navbar { padding:0 1rem; }
  .nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    cursor: pointer;
    z-index: 1002;
    position: relative;
    background: none;
    border: none;
    padding: 0;
  }
  .nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
    transition: all 0.3s ease;
    transform-origin: center;
  }
  .nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
  .nav-toggle.active span:nth-child(2) { opacity: 0; }
  .nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }
  .nav-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
  }
  .nav-overlay.active { opacity:1; visibility:visible; }
  .nav-links {
    position: fixed;
    top: 0;
    right: -250px;
    width: 250px;
    height: 100vh;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(24px);
    border-left: 1px solid rgba(255,255,255,0.3);
    flex-direction: column;
    gap: 0;
    padding: 5rem 1.5rem 2rem;
    z-index: 999;
    transition: right 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: -4px 0 24px rgba(0,0,0,0.08);
    overflow-y: auto;
  }
  .nav-links.active { right: 0; }
  .nav-links li { width:100%; }
  .nav-links a {
    display: block;
    padding: 0.8rem 1rem;
    font-size: 0.95rem;
    border-radius: 8px;
    transition: all 0.25s ease;
    color: #e2e8f0;
    border-left: 2px solid transparent;
  }
  .nav-links a:hover, .nav-links a.active {
    background: rgba(59,130,246,0.1);
    color: var(--accent);
    border-left-color: var(--accent);
  }
  .nav-links a::after { display:none; }
}
/* ===== Banner轮播样式 ===== */
.banner-carousel {
  position: absolute;
  inset: 0;
  overflow: hidden;
}
.banner-carousel-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1.2s ease-in-out;
}
.banner-carousel-slide.active {
  opacity: 1;
}
.banner-carousel-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: blur(6px);
  -webkit-filter: blur(6px);
  transform: scale(1.05);
}
.banner-carousel-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.35);
  z-index: 1;
}
.banner-carousel-dots {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 10;
}
.banner-carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.4);
  cursor: pointer;
  transition: all 0.3s;
  border: 1px solid rgba(255,255,255,0.3);
}
.banner-carousel-dot.active {
  background: #fff;
  transform: scale(1.2);
}