/* ========================================
   MuseumAI — 企业介绍网站
   现代科技感 · 蓝紫渐变基调
   ======================================== */

/* --- Reset & Base --- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
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:#0f172a;background:#fff;line-height:1.6;overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
a{text-decoration:none;color:inherit}
ul{list-style:none}
img{max-width:100%;display:block}
.container{max-width:1100px;margin:0 auto;padding:0 24px}

/* --- Navigation --- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  background:rgba(255,255,255,.85);backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(79,70,229,.08);
  transition:box-shadow .3s;
}
.nav.scrolled{box-shadow:0 4px 32px rgba(0,0,0,.06)}
.nav-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:64px;
}
.nav-logo{
  display:flex;align-items:center;gap:10px;
  font-size:20px;font-weight:800;letter-spacing:-.5px;
}
.nav-logo .logo-mark{
  width:36px;height:36px;display:flex;align-items:center;justify-content:center;
}
.nav-logo .logo-mark svg,.nav-logo .logo-mark img{width:100%;height:100%;display:block}
.nav-links{display:flex;gap:32px;align-items:center}
.nav-links a{
  font-size:14px;font-weight:500;color:#475569;
  transition:color .2s;position:relative;
}
.nav-links a::after{
  content:'';position:absolute;bottom:-4px;left:0;width:0;height:2px;
  background:linear-gradient(90deg,#4F46E5,#7C3AED);
  transition:width .3s;border-radius:1px;
}
.nav-links a:hover{color:#4F46E5}
.nav-links a:hover::after{width:100%}
.nav-cta{
  padding:8px 20px;border-radius:8px;
  background:linear-gradient(135deg,#4F46E5,#7C3AED);
  color:#fff!important;font-weight:600;font-size:14px;
  transition:transform .2s,box-shadow .2s;
}
.nav-cta::after{display:none!important}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 4px 16px rgba(79,70,229,.35)}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;background:none;border:none;padding:4px}
.nav-toggle span{width:24px;height:2px;background:#1e293b;border-radius:2px;transition:.3s}

/* --- Hero --- */
.hero{
  min-height:100vh;display:flex;align-items:center;position:relative;
  background:#f8fafc;overflow:hidden;padding:120px 0 80px;
}
.hero-grid{
  position:absolute;inset:0;overflow:hidden;pointer-events:none;
}
.hero-grid::before{
  content:'';position:absolute;inset:-50%;
  background-image:
    linear-gradient(rgba(79,70,229,.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(79,70,229,.06) 1px,transparent 1px);
  background-size:60px 60px;animation:gridMove 20s linear infinite;
  transform-origin:center;
}
@keyframes gridMove{
  0%{transform:translate(0,0) rotate(0deg)}
  100%{transform:translate(-60px,-60px) rotate(0deg)}
}
.hero-glow1,.hero-glow2{
  position:absolute;border-radius:50%;filter:blur(100px);pointer-events:none;
}
.hero-glow1{
  width:600px;height:600px;background:rgba(79,70,229,.12);top:-200px;right:-100px;
  animation:glowFloat 8s ease-in-out infinite alternate;
}
.hero-glow2{
  width:500px;height:500px;background:rgba(124,58,237,.1);bottom:-150px;left:-100px;
  animation:glowFloat 10s ease-in-out infinite alternate-reverse;
}
@keyframes glowFloat{
  0%{transform:translate(0,0) scale(1)}
  100%{transform:translate(60px,40px) scale(1.1)}
}
.hero .container{position:relative;z-index:1}
.hero-badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 16px;border-radius:20px;
  background:rgba(79,70,229,.08);color:#4F46E5;
  font-size:13px;font-weight:600;margin-bottom:24px;
}
.hero-badge .dot{width:6px;height:6px;border-radius:50%;background:#4F46E5;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.3}}
.hero h1{
  font-size:54px;font-weight:800;line-height:1.15;letter-spacing:-1.5px;
  margin-bottom:20px;max-width:700px;
}
.hero h1 .gradient-text{
  background:linear-gradient(135deg,#4F46E5,#7C3AED,#EC4899);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
}
.hero p{
  font-size:18px;color:#64748b;line-height:1.7;
  max-width:540px;margin-bottom:36px;
}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 28px;border-radius:10px;font-size:15px;font-weight:600;
  transition:all .3s;cursor:pointer;border:none;
}
.btn-primary{
  background:linear-gradient(135deg,#4F46E5,#7C3AED);
  color:#fff;box-shadow:0 4px 20px rgba(79,70,229,.3);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 32px rgba(79,70,229,.4)}
.btn-ghost{
  background:rgba(79,70,229,.06);color:#4F46E5;
}
.btn-ghost:hover{background:rgba(79,70,229,.12);transform:translateY(-2px)}
.hero-stats{
  display:flex;gap:48px;margin-top:56px;
  padding-top:32px;border-top:1px solid rgba(79,70,229,.08);
}
.hero-stats .num{font-size:28px;font-weight:800;color:#0f172a}
.hero-stats .label{font-size:14px;color:#94a3b8;margin-top:2px}

/* --- 产品服务 --- */
.section{padding:100px 0}
.section-alt{background:#f8fafc}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 14px;border-radius:20px;
  background:rgba(79,70,229,.08);color:#4F46E5;
  font-size:13px;font-weight:600;margin-bottom:12px;
}
.section-title{
  font-size:36px;font-weight:800;letter-spacing:-.5px;
  margin-bottom:16px;
}
.section-sub{
  font-size:17px;color:#64748b;max-width:600px;margin-bottom:56px;
}

/* Product Cards */
.products-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.product-card{
  background:#fff;border-radius:16px;padding:36px 28px;
  border:1px solid rgba(0,0,0,.04);
  box-shadow:0 1px 3px rgba(0,0,0,.04);
  transition:all .4s;position:relative;overflow:hidden;
}
.product-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,#4F46E5,#7C3AED);
  transform:scaleX(0);transform-origin:left;transition:transform .4s;
}
.product-card:hover{transform:translateY(-6px);box-shadow:0 20px 60px rgba(79,70,229,.12)}
.product-card:hover::before{transform:scaleX(1)}
.pc-icon{
  width:52px;height:52px;border-radius:14px;margin-bottom:20px;
  display:flex;align-items:center;justify-content:center;
}
.pc-icon svg{width:26px;height:26px}
.pc-title{font-size:20px;font-weight:700;margin-bottom:10px}
.pc-desc{font-size:14px;color:#64748b;line-height:1.7;margin-bottom:20px}
.pc-features{display:flex;flex-direction:column;gap:8px}
.pc-features li{
  font-size:14px;color:#475569;display:flex;align-items:center;gap:8px;
}
.pc-features li::before{
  content:'';width:5px;height:5px;border-radius:50%;flex-shrink:0;
  background:linear-gradient(135deg,#4F46E5,#7C3AED);
}

/* --- 优势 / 数据 --- */
.advantages{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-bottom:64px}
.advantage-item{
  text-align:center;padding:28px 16px;
  background:#fff;border-radius:12px;
  border:1px solid rgba(0,0,0,.04);transition:all .3s;
}
.advantage-item:hover{transform:translateY(-3px);box-shadow:0 12px 40px rgba(79,70,229,.08)}
.advantage-item .num{
  font-size:36px;font-weight:800;
  background:linear-gradient(135deg,#4F46E5,#7C3AED);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
}
.advantage-item .label{font-size:14px;color:#64748b;margin-top:6px}
.advantage-item .badge{
  display:inline-block;margin-top:8px;
  padding:2px 10px;border-radius:10px;
  background:rgba(79,70,229,.06);
  font-size:11px;font-weight:600;color:#4F46E5;
}

.advantage-details{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.adv-detail{
  display:flex;gap:14px;padding:20px;background:#fff;
  border-radius:12px;border:1px solid rgba(0,0,0,.04);
  align-items:flex-start;
}
.adv-detail svg{width:22px;height:22px;flex-shrink:0;margin-top:2px}
.adv-detail h4{font-size:15px;font-weight:600;margin-bottom:4px}
.adv-detail p{font-size:14px;color:#64748b;line-height:1.6}

/* --- 关于 --- */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.about-text .lead{font-size:18px;font-weight:600;color:#0f172a;margin-bottom:16px}
.about-text p{font-size:15px;color:#64748b;line-height:1.8;margin-bottom:12px}
.about-mission{
  background:linear-gradient(135deg,rgba(79,70,229,.06),rgba(124,58,237,.06));
  border-radius:16px;padding:36px;border:1px solid rgba(79,70,229,.1);
}
.about-mission h4{font-size:16px;font-weight:700;margin-bottom:8px;color:#4F46E5}
.about-mission p{font-size:14px;color:#475569;line-height:1.7}

/* --- 联系 --- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px}
.contact-info{display:flex;flex-direction:column;gap:24px}
.ci-item{
  display:flex;gap:16px;align-items:flex-start;
  padding:20px;background:#fff;border-radius:12px;
  border:1px solid rgba(0,0,0,.04);
}
.ci-item svg{width:22px;height:22px;flex-shrink:0;margin-top:2px}
.ci-item h4{font-size:14px;font-weight:600;margin-bottom:2px}
.ci-item p{font-size:14px;color:#64748b}
.contact-form{display:flex;flex-direction:column;gap:16px;background:#fff;border-radius:12px;border:1px solid rgba(0,0,0,.04);padding:24px}
.cf-header{margin-bottom:4px}
.cf-header h4{font-size:16px;font-weight:700;margin-bottom:2px}
.cf-header p{font-size:14px;color:#64748b}
.contact-form input,.contact-form textarea{
  padding:14px 16px;border-radius:10px;border:1px solid #e2e8f0;
  font-size:15px;font-family:inherit;transition:border-color .2s,box-shadow .2s;
  background:#fff;outline:none;
}
.contact-form input:focus,.contact-form textarea:focus{
  border-color:#4F46E5;box-shadow:0 0 0 3px rgba(79,70,229,.1);
}
.contact-form textarea{height:120px;resize:vertical}

/* --- Footer --- */
.footer{
  background:#0f172a;color:#94a3b8;
  padding:48px 0 32px;
}
.footer-inner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px}
.footer-logo{font-size:18px;font-weight:800;color:#fff}
.footer-links{display:flex;gap:24px}
.footer-links a{font-size:14px;transition:color .2s}
.footer-links a:hover{color:#fff}
.footer-copy{font-size:13px;text-align:center;width:100%;margin-top:24px;padding-top:24px;border-top:1px solid rgba(255,255,255,.06)}

/* --- Animations --- */
.fade-in{opacity:0;transform:translateY(24px);transition:all .6s ease-out}
.fade-in.visible{opacity:1;transform:translateY(0)}

/* --- Mobile --- */
@media(max-width:768px){
  .nav-links{display:none;position:absolute;top:64px;left:0;right:0;
    background:rgba(255,255,255,.95);backdrop-filter:blur(16px);
    flex-direction:column;padding:16px 24px 24px;
    border-bottom:1px solid rgba(0,0,0,.06);gap:16px;
  }
  .nav-links.open{display:flex}
  .nav-toggle{display:flex}
  .hero h1{font-size:34px}
  .hero p{font-size:16px}
  .hero-stats{gap:24px;flex-wrap:wrap}
  .products-grid{grid-template-columns:1fr}
  .advantages{grid-template-columns:repeat(2,1fr);gap:12px}
  .advantage-details{grid-template-columns:1fr}
  .about-grid{grid-template-columns:1fr;gap:32px}
  .contact-grid{grid-template-columns:1fr}
  .section{padding:60px 0}
  .section-title{font-size:28px}
}

@media(max-width:480px){
  .hero h1{font-size:28px}
  .advantages{grid-template-columns:repeat(2,1fr)}
  .advantage-item .num{font-size:28px}
  .hero-stats{gap:16px}
  .hero-stats .num{font-size:22px}
}