/* WorldTamer theme: 驯兽 · 冒险 · 清亮绿蓝系 */
*{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#020617;
  --card:#020B13;
  --primary:#4ADE80;
  --secondary:#22D3EE;
  --accent:#F97316;
  --text:#E5E7EB;
  --muted:#9CA3AF;
  --border:rgba(45,212,191,0.55);
  --shadow:0 16px 40px rgba(0,0,0,0.7);
  --grad:linear-gradient(135deg,#22D3EE 0%,#4ADE80 50%,#F97316 100%);
}
html{scroll-behavior:smooth}
body{
  font-family:system-ui,-apple-system,Segoe UI,Microsoft YaHei,PingFang SC,sans-serif;
  background:
    radial-gradient(circle at 0 0,rgba(34,211,238,0.16),transparent 55%),
    radial-gradient(circle at 100% 100%,rgba(74,222,128,0.14),transparent 50%),
    var(--bg);
  color:var(--text);
  line-height:1.65;
  overflow-x:hidden;
}
.container{max-width:1200px;margin:0 auto;padding:0 18px}
.header{position:sticky;top:0;z-index:50;background:rgba(2,6,23,0.75);backdrop-filter:blur(14px);border-bottom:1px solid rgba(148,163,184,0.35)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 0}
.brand{display:flex;gap:10px;align-items:center}
.brand img{width:38px;height:38px;border-radius:999px;box-shadow:0 0 0 2px rgba(34,211,238,0.4)}
.brand b{font-size:19px;letter-spacing:.6px}
.nav ul{display:flex;gap:16px;list-style:none;flex-wrap:wrap}
.nav a{color:var(--text);text-decoration:none;opacity:.9}
.nav a:hover{opacity:1;color:#fff}
.menu-btn{display:none;background:transparent;border:1px solid var(--border);color:var(--text);padding:8px 10px;border-radius:10px}

.hero{position:relative;min-height:560px;display:flex;align-items:center;justify-content:center;text-align:center}
.hero::before{content:"";position:absolute;inset:0;background:var(--grad);opacity:.8}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.28;mix-blend-mode:overlay}
.hero .content{position:relative;z-index:1;padding:60px 0;max-width:900px}
.hero h1{font-size:44px;line-height:1.1;margin-bottom:10px}
.hero p{opacity:.95}
.chips{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin:18px 0 26px}
.chip{border:1px solid rgba(255,255,255,0.25);padding:6px 10px;border-radius:999px;font-size:13px;background:rgba(0,0,0,0.15)}
.cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:12px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 18px;border-radius:12px;text-decoration:none;font-weight:700}
.btn.primary{background:#fff;color:#111827}
.btn.primary:hover{background:#FBBF24}
.btn.ghost{border:1px solid rgba(255,255,255,0.35);color:#fff;background:transparent}
.btn.ghost:hover{background:rgba(255,255,255,0.10)}

section{padding:70px 0}
.section-title{font-size:28px;margin-bottom:10px}
.section-sub{color:var(--muted);max-width:820px}
.card{background:var(--card);border:1px solid var(--border);border-radius:18px;box-shadow:var(--shadow)}
.grid{display:grid;gap:18px}
.grid.cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid.cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}

.gallery{margin-top:24px}
.shot{border-radius:16px;overflow:hidden;border:1px solid var(--border);background:#0b1220}
.shot img{width:100%;height:100%;display:block;object-fit:cover;aspect-ratio:16/9}
.shot:hover img{transform:scale(1.03)}
.shot img{transition:transform .25s ease}

/* systems overview */
.systems-grid{margin-top:22px}
.sys-card{background:var(--card);border-radius:20px;border:1px solid var(--border);padding:18px 16px;box-shadow:var(--shadow);position:relative;overflow:hidden}
.sys-card::before{content:"";position:absolute;inset:0;pointer-events:none;background:
  radial-gradient(circle at 100% 0,rgba(34,211,238,0.18),transparent 55%),
  radial-gradient(circle at 0 100%,rgba(74,222,128,0.16),transparent 55%);
}
.sys-card h3{font-size:18px;margin-bottom:8px;color:var(--primary)}
.sys-card p{font-size:14px;color:var(--muted)}

.guide .card{padding:18px}
.guide h3{margin:10px 0}
.guide ul,.guide ol{padding-left:20px;color:var(--text)}
.guide li{margin:6px 0}

.footer{border-top:1px solid var(--border);padding:28px 0;color:var(--muted)}
.footer a{color:var(--muted)}

@media (max-width: 900px){
  .grid.cols-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .hero h1{font-size:36px}
}
@media (max-width: 640px){
  .grid.cols-3,.grid.cols-2{grid-template-columns:1fr}
  .nav{display:none}
  .nav.active{display:block;padding-bottom:10px}
  .nav ul{flex-direction:column;align-items:flex-start}
  .menu-btn{display:inline-flex}
  .hero{min-height:520px}
}