/* assets/css/style.css */

/* =========================
   Reset & Base
========================= */
*{margin:0;padding:0;box-sizing:border-box;}
body{font-family:"Inter",Arial,sans-serif;background:#F7F9FC;color:#1F2937;line-height:1.6;}
.container{width:90%;max-width:1200px;margin:auto;}
img{width:100%;border-radius:8px;}
a{text-decoration:none;color:inherit;}

/* =========================
   Topbar
========================= */
.topbar{
  background:#1F2937;
  color:#fff;
  font-size:12px;
  padding:6px 0;
}
.topbar .container{
  display:flex;
  justify-content:space-between;
}

/* =========================
   Header
========================= */
header{
  background:#fff;
  border-bottom:1px solid #e5e7eb;
  position:sticky;top:0;z-index:999;
  transition:0.3s;
}
header.scrolled{box-shadow:0 4px 12px rgba(0,0,0,0.08);}

.nav-wrapper{
  display:flex;align-items:center;justify-content:space-between;padding:15px 0;
}
.logo img{height:42px;}

nav ul{display:flex;gap:28px;list-style:none;}
nav a{font-size:14px;color:#374151;position:relative;}
nav a.active,nav a:hover{color:#2563EB;}

.btn{
  padding:10px 18px;
  border-radius:8px;
  font-size:14px;
  transition:0.3s;
  display:inline-block;
}

.btn-primary{background:#2563EB;color:#fff;}
.btn-accent{background:#F97316;color:#fff;}

.btn:hover{
  transform:translateY(-2px);
  box-shadow:0 6px 14px rgba(0,0,0,0.12);
}

/* 按钮之间间距 */
.btn + .btn{
  margin-left:10px;
}

/* Mobile */
.menu-toggle{display:none;font-size:24px;}
@media(max-width:768px){
  nav{display:none;position:absolute;background:#fff;top:70px;width:100%;}
  nav.active{display:block;}
  nav ul{flex-direction:column;padding:20px;}
  .menu-toggle{display:block;}
}

/* =========================
   Hero
========================= */
.hero{
  background:linear-gradient(135deg,#F7F9FC,#EAF2FF);
  padding:80px 0;
  position:relative;
}
.hero::before{
  content:"";
  position:absolute;
  width:300px;height:300px;
  background:rgba(37,99,235,0.15);
  filter:blur(100px);
  border-radius:50%;
  top:-100px;right:-100px;
}

.hero-content{display:flex;gap:50px;align-items:center;}

.hero-text h1{font-size:40px;margin-bottom:20px;}
.hero-text p{color:#6B7280;margin-bottom:20px;}

.hero-points{margin-bottom:20px;}
.hero-points li{
  font-size:14px;
  margin-bottom:6px;
  color:#374151;
}

/* Hero按钮间距 */
.hero .btn{
  margin-top:10px;
  margin-right:12px;
}

.hero-img{
  position:relative;
  background:#e5e7eb;
  padding:20px;
}
.hero-img::after{
  content:"";
  position:absolute;
  inset:-10px;
  background:radial-gradient(circle,rgba(37,99,235,0.2),transparent);
  filter:blur(30px);
  z-index:-1;
}

/* =========================
   Sections
========================= */
.section{padding:70px 0;}
.section:nth-child(even){background:#fff;}

.section-title{font-size:28px;margin-bottom:20px;}
.section-sub{color:#6B7280;margin-bottom:40px;}

/* =========================
   Cards
========================= */
.card-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:25px;
}
.card{
  background:#fff;
  padding:25px;
  border-radius:10px;
  text-align:center;
  transition:0.3s;
  box-shadow:0 2px 6px rgba(0,0,0,0.05);
}
.card:hover{
  transform:translateY(-6px);
  box-shadow:0 10px 20px rgba(0,0,0,0.08);
  border:1px solid rgba(37,99,235,0.2);
}

/* =========================
   Product Grid
========================= */
.product-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:30px;
}

.product-card{
  background:#fff;
  padding:18px;
  border-radius:10px;
  transition:0.3s;
  padding-bottom:22px;
}

.product-card:hover{
  transform:translateY(-6px);
  box-shadow:0 10px 18px rgba(0,0,0,0.08);
}

.product-card h4{
  margin-top:10px;
  margin-bottom:8px;
}

.product-card p{
  font-size:13px;
  color:#6B7280;
  margin-bottom:6px;
}

/* 按钮与文字间距 */
.product-card .btn{
  margin-top:12px;
  padding:8px 14px;
  font-size:13px;
}

/* =========================
   Stats
========================= */
.stats{
  display:flex;
  justify-content:space-between;
  margin-top:40px;
  text-align:center;
}
.stats div{
  font-weight:bold;
  font-size:18px;
}

/* =========================
   CTA
========================= */
.cta{
  background:linear-gradient(135deg,#2563EB,#1E40AF);
  color:#fff;
  padding:60px 0;
  text-align:center;
  border-radius:10px;
}

.cta .btn{
  margin-top:20px;
}

/* =========================
   Footer
========================= */
footer{
  background:linear-gradient(180deg,#1F2937,#111827);
  color:#fff;
  padding:60px 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:30px;
}
.footer ul{list-style:none;}
.footer ul li{margin-bottom:10px;}
.footer a{color:#d1d5db;font-size:14px;}
.footer a:hover{color:#fff;}

.footer-bottom{
  margin-top:40px;
  font-size:13px;
  color:#9ca3af;
}

/* =========================
   Animation
========================= */
.fade-in{
  opacity:0;
  transform:translateY(30px);
  transition:0.8s;
}
.fade-in.show{
  opacity:1;
  transform:translateY(0);
}

/* =========================
   Responsive
========================= */
@media(max-width:992px){
  .hero-content{flex-direction:column;}
  .card-grid{grid-template-columns:repeat(2,1fr);}
  .product-grid{grid-template-columns:repeat(2,1fr);}
}

@media(max-width:600px){
  .card-grid,
  .product-grid,
  .footer-grid{
    grid-template-columns:1fr;
  }
}