*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#0a0a0f;--bg2:#12121a;--card:#1a1a26;--border:#2a2a3a;
  --text:#f0f0f5;--muted:#9898aa;--accent:#e53935;--accent2:#ff6b6b;
  --blue:#4a90d9;--green:#4caf50;--glow:rgba(229,57,53,.35)
}
html{scroll-behavior:smooth}
body{
  font-family:"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--text);line-height:1.7;min-height:100vh;overflow-x:hidden
}
a{color:var(--blue);text-decoration:none;transition:color .25s}
a:hover{color:var(--accent2)}
img{max-width:100%;height:auto;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 5%}

/* Header */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  background:rgba(10,10,15,.92);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border);padding:.85rem 0
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem}
.brand{display:flex;align-items:center;gap:.65rem;color:var(--text);font-weight:700;font-size:1.15rem}
.brand img{width:36px;height:36px}
.site-nav{display:flex;align-items:center;gap:1.5rem;flex-wrap:wrap}
.site-nav a{color:var(--muted);font-size:.95rem}
.site-nav a.active,.site-nav a:hover{color:var(--accent2)}
.btn-dl{
  background:linear-gradient(135deg,var(--accent),#c62828);color:#fff!important;
  padding:.45rem 1.2rem;border-radius:6px;font-weight:600;
  box-shadow:0 4px 20px var(--glow);transition:transform .25s,box-shadow .25s
}
.btn-dl:hover{transform:translateY(-2px);box-shadow:0 8px 28px var(--glow);color:#fff!important}

/* 3D Hero */
.hero-3d{position:relative;min-height:100vh;display:flex;align-items:center;padding:6rem 0 4rem;overflow:hidden}
#canvas-3d{position:absolute;inset:0;z-index:0;pointer-events:none}
.hero-content{position:relative;z-index:2;text-align:center;width:100%}
.hero-content h1{
  font-size:clamp(2.2rem,5vw,3.8rem);margin-bottom:1rem;
  background:linear-gradient(90deg,#fff,var(--accent2),#fff);
  background-size:200% auto;-webkit-background-clip:text;-webkit-text-fill-color:transparent;
  animation:shine 4s linear infinite
}
@keyframes shine{0%{background-position:200% center}100%{background-position:-200% center}}
.hero-content .sub{font-size:1.15rem;color:var(--muted);max-width:720px;margin:0 auto 2rem}
.hero-btns{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap;margin-bottom:2.5rem}
.btn-primary,.btn-outline{
  padding:.75rem 1.8rem;border-radius:8px;font-weight:600;font-size:1rem;transition:all .3s
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 4px 24px var(--glow)}
.btn-primary:hover{transform:translateY(-3px) scale(1.02);color:#fff}
.btn-outline{border:2px solid var(--border);color:var(--text)}
.btn-outline:hover{border-color:var(--accent);color:var(--accent2)}
.hero-preview{
  max-width:900px;margin:0 auto;border-radius:12px;overflow:hidden;
  border:1px solid var(--border);box-shadow:0 20px 60px rgba(0,0,0,.5);
  transform:perspective(1200px) rotateX(8deg);transition:transform .6s
}
.hero-preview:hover{transform:perspective(1200px) rotateX(2deg) scale(1.01)}

/* Cards 3D */
.section{padding:5rem 0}
.section-title{text-align:center;font-size:2rem;margin-bottom:.5rem;color:var(--text)}
.section-desc{text-align:center;color:var(--muted);margin-bottom:3rem;max-width:640px;margin-left:auto;margin-right:auto}
.cards-3d{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem;
  perspective:1000px
}
.card-3d{
  background:var(--card);border:1px solid var(--border);border-radius:14px;padding:1.8rem;
  transition:transform .4s,box-shadow .4s,border-color .4s;transform-style:preserve-3d
}
.card-3d:hover{
  transform:translateY(-8px) rotateX(4deg) rotateY(-2deg);
  border-color:var(--accent);box-shadow:0 16px 40px rgba(229,57,53,.15)
}
.card-3d .icon{font-size:2rem;margin-bottom:.8rem}
.card-3d h3{font-size:1.15rem;margin-bottom:.6rem;color:var(--accent2)}
.card-3d p{color:var(--muted);font-size:.92rem}

/* Stats */
.stats-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:1rem;margin-top:3rem}
.stat-box{text-align:center;padding:1.5rem;background:var(--card);border-radius:10px;border:1px solid var(--border)}
.stat-box strong{display:block;font-size:1.8rem;color:var(--accent2)}
.stat-box span{color:var(--muted);font-size:.85rem}

/* News grid */
.news-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.5rem}
.news-card{
  background:var(--card);border:1px solid var(--border);border-radius:12px;overflow:hidden;
  transition:transform .3s,box-shadow .3s
}
.news-card:hover{transform:translateY(-6px);box-shadow:0 12px 36px rgba(0,0,0,.4)}
.news-card img{width:100%;aspect-ratio:600/340;object-fit:cover}
.news-card .body{padding:1.2rem 1.4rem 1.5rem}
.news-card time{color:var(--muted);font-size:.8rem}
.news-card h3{font-size:1.05rem;margin:.5rem 0;color:var(--text);line-height:1.4}
.news-card p{color:var(--muted);font-size:.88rem;margin-bottom:.8rem}
.read-more{color:var(--accent2);font-size:.88rem;font-weight:600}

/* Page hero */
.page-hero{padding:7rem 0 3rem;background:linear-gradient(180deg,var(--bg2),var(--bg));text-align:center;border-bottom:1px solid var(--border)}
.page-hero h1{font-size:2.4rem;margin-bottom:.8rem}
.page-hero p{color:var(--muted);max-width:640px;margin:0 auto}

/* Download */
.dl-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.5rem;margin-top:2rem}
.dl-card{
  background:var(--card);border:1px solid var(--border);border-radius:14px;padding:2rem;text-align:center;
  transition:transform .3s,border-color .3s
}
.dl-card:hover{transform:scale(1.03);border-color:var(--accent)}
.dl-card .os{font-size:2.5rem;margin-bottom:.5rem}
.dl-card h3{margin-bottom:.5rem}
.dl-card p{color:var(--muted);font-size:.9rem;margin-bottom:1.2rem}
.dl-card a.btn-dl{display:inline-block}

/* Article */
.article-wrap{max-width:800px;margin:0 auto;padding:3rem 5%}
.article-wrap h2{margin:2rem 0 1rem;color:var(--accent2)}
.article-wrap p,.article-wrap li{color:var(--muted);margin-bottom:1rem}
.card-3d ul,.article-wrap ol{padding-left:1.5rem;margin-bottom:1rem}
.card-3d li,.article-wrap li{color:var(--muted);margin-bottom:.4rem;font-size:.92rem}
.article-wrap code{background:var(--card);padding:.15rem .4rem;border-radius:4px;font-size:.88rem;color:var(--accent2)}
.article-cover{border-radius:12px;margin:1.5rem 0;border:1px solid var(--border)}

/* Landing CTA */
.landing-cta{
  text-align:center;padding:5rem 5%;background:linear-gradient(135deg,#1a0a0a,#12121a);
  border-top:1px solid var(--border);border-bottom:1px solid var(--border)
}
.landing-cta h2{font-size:2.2rem;margin-bottom:1rem}
.landing-cta p{color:var(--muted);margin-bottom:2rem}

/* Footer */
.site-footer{padding:3rem 0 2rem;border-top:1px solid var(--border);margin-top:3rem}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:2rem;margin-bottom:2rem}
.footer-grid h4{color:var(--accent2);margin-bottom:.8rem;font-size:.95rem}
.footer-grid a,.footer-grid p{display:block;color:var(--muted);font-size:.88rem;margin-bottom:.4rem}
.footer-bottom{text-align:center;color:var(--muted);font-size:.82rem;padding-top:1.5rem;border-top:1px solid var(--border)}
.footer-friends{margin-bottom:.6rem}
.footer-friends a{color:var(--muted)}
.footer-friends a:hover{color:var(--accent2)}

/* Breadcrumb */
.breadcrumb{padding:5.5rem 5% 0;font-size:.85rem;color:var(--muted)}
.breadcrumb a{color:var(--muted)}
.breadcrumb span{margin:0 .4rem}

@media(max-width:768px){
  .site-nav{gap:.8rem;font-size:.85rem}
  .hero-preview{transform:none}
  .card-3d:hover{transform:translateY(-4px)}
}