/* 主样式：遵循简约现代风格，主色系：#0a192f (深空蓝), #ffffff, #64ffda (科技蓝) */
:root{
  --bg:#0a192f;
  --bg-2:#071826;
  --surface:#0f2740;
  --text:#e6f7f2;
  --muted:#9fb7c7;
  --accent:#64ffda;
  --radius:12px;
  --max-width:1200px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;font-family:'Inter','Segoe UI',system-ui, -apple-system, 'Microsoft YaHei',sans-serif;background:linear-gradient(180deg,var(--bg),var(--bg-2));color:var(--text);-webkit-font-smoothing:antialiased;line-height:1.5;font-size:16px;
}
.container{max-width:var(--max-width);margin:0 auto;padding:0 20px}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:18px 0}
.logo{font-weight:700;color:var(--accent);text-decoration:none;font-size:1.05rem}
.main-nav .nav-list{list-style:none;margin:0;padding:0;display:flex;gap:18px}
.main-nav a{color:var(--text);text-decoration:none;opacity:0.95}
.main-nav a:hover{color:var(--accent)}
.nav-toggle{display:none;background:transparent;border:0;color:var(--text);font-size:20px}

/* 导航半透明毛玻璃效果（激活） */
.site-header{position:relative;z-index:50}
.site-header.sticky{position:fixed;top:0;left:0;right:0;background:rgba(10,25,47,0.6);backdrop-filter:blur(8px);box-shadow:0 6px 18px rgba(2,6,23,0.6)}

/* hero 横幅 */
.hero{min-height:78vh;display:flex;align-items:center}
.hero-inner{padding:60px 0;text-align:left}
.hero .headline{font-size:2.4rem;margin:0 0 12px}
.hero .subtitle{color:var(--muted);font-size:1.05rem;margin:0 0 20px}
.btn{display:inline-block;padding:12px 20px;border-radius:999px;background:var(--accent);color:#072129;text-decoration:none;font-weight:700;transition:transform .18s ease,background .25s ease}
.btn:hover{transform:scale(1.05);background:#056f5c}

/* 产品卡片 */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:28px}
.card{background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));padding:18px;border-radius:12px;transition:transform .3s ease,box-shadow .3s ease;transform:translateY(0);box-shadow:0 8px 24px rgba(2,6,23,0.45)}
.card:hover{transform:translateY(-5px);box-shadow:0 18px 46px rgba(2,6,23,0.6)}
.card .icon{font-size:26px;margin-bottom:8px}
.card h3{margin:0 0 8px}
.card p{margin:0;color:var(--muted)}

/* 博客列表 */
.blog-list{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:28px}
.post{background:rgba(255,255,255,0.02);padding:16px;border-radius:10px}
.post .meta{color:var(--muted);font-size:0.9rem;margin-bottom:8px}
.post h4{margin:0 0 8px}

/* Footer */
.site-footer{margin-top:48px;padding:28px 0;border-top:1px solid rgba(255,255,255,0.03)}
.footer-inner{display:flex;gap:40px;align-items:flex-start;justify-content:space-between}
.footer-inner .contact h4{margin:0 0 8px}
.footer-inner a{color:var(--muted);text-decoration:none}
.footer-inner a:hover{color:var(--accent)}
.copyright{margin-top:14px;color:var(--muted);text-align:center}

/* reveal 动画初始态 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .6s ease,transform .6s ease}
.reveal.visible{opacity:1;transform:none}

/* responsive */
@media (max-width:1000px){
  .grid,.blog-list{grid-template-columns:repeat(2,1fr)}
  .hero .headline{font-size:1.9rem}
}
@media (max-width:768px){
  .main-nav{display:none}
  .nav-toggle{display:block}
  .grid,.blog-list{grid-template-columns:1fr}
  .hero{min-height:60vh}
  .header-inner{padding:12px 0}
}

/* mobile drawer */
.mobile-drawer{display:none;position:fixed;inset:0;background:rgba(4,10,18,0.8);z-index:60;padding:40px}
.mobile-drawer ul{list-style:none;padding:0;color:var(--text)}
.mobile-drawer a{display:block;padding:10px 0;color:var(--text);text-decoration:none}
.mobile-drawer.open{display:block}