/* ===== 雷电模拟器 - 暗夜雷电紫 ===== */
:root {
  --bg: #0b0d17;
  --bg2: #111422;
  --bg3: #161a2b;
  --card: #13172a;
  --card-hover: #191e35;
  --border: #1e2340;
  --border-light: #252b48;
  --text: #e8eaf0;
  --text2: #a0a8c0;
  --text3: #666e8a;
  --purple: #a855f7;
  --purple-light: #c084fc;
  --cyan: #22d3ee;
  --cyan-light: #67e8f9;
  --grad: linear-gradient(135deg, #a855f7, #6366f1);
  --grad-accent: linear-gradient(135deg, #a855f7, #22d3ee);
  --grad-soft: linear-gradient(135deg, rgba(168,85,247,0.06), rgba(34,211,238,0.04));
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 4px 30px rgba(0,0,0,0.4);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.6);
  --shadow-glow: 0 0 40px rgba(168,85,247,0.15);
  --trans: 0.3s cubic-bezier(0.4,0,0.2,1);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--text);line-height:1.7;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}

/* Nav - glass morphism */
.nav-bar{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  background:rgba(11,13,23,0.88);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border-bottom:1px solid var(--border);
}
.nav-inner{
  max-width:1240px;margin:0 auto;padding:0 32px;height:64px;
  display:flex;align-items:center;justify-content:space-between;
}
.nav-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:800;letter-spacing:-0.3px}
.nav-brand img{width:30px;height:30px}
.nav-brand .accent{color:var(--purple-light)}
.nav-menu{display:flex;align-items:center;gap:4px}
.nav-menu a{padding:9px 18px;border-radius:8px;font-size:13px;font-weight:500;color:var(--text2);transition:all var(--trans)}
.nav-menu a:hover{color:var(--text);background:rgba(168,85,247,0.08)}
.nav-menu a.btn-nav{
  background:var(--grad);color:#fff;font-weight:600;border-radius:8px;
  padding:10px 22px;box-shadow:0 4px 20px rgba(168,85,247,0.35)
}
.nav-menu a.btn-nav:hover{transform:translateY(-1px);box-shadow:0 8px 30px rgba(168,85,247,0.50)}
.nav-toggle{display:none;background:none;border:none;color:var(--text);font-size:24px;cursor:pointer}

/* Hero */
.hero{
  padding:150px 0 90px;position:relative;overflow:hidden;
}
.hero::before{
  content:'';position:absolute;top:-200px;right:-100px;
  width:600px;height:600px;
  background:radial-gradient(circle,rgba(168,85,247,0.08) 0%,transparent 60%);
  border-radius:50%;pointer-events:none
}
.hero::after{
  content:'';position:absolute;bottom:-120px;left:-60px;
  width:400px;height:400px;
  background:radial-gradient(circle,rgba(34,211,238,0.06) 0%,transparent 60%);
  border-radius:50%;pointer-events:none
}
.hero-grid{
  max-width:1240px;margin:0 auto;padding:0 32px;
  display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center;
  position:relative;z-index:1
}
.hero-text .tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 16px;border-radius:20px;
  background:rgba(168,85,247,0.1);border:1px solid rgba(168,85,247,0.2);
  color:var(--purple-light);font-size:12px;font-weight:700;margin-bottom:28px
}
.hero-text h1{font-size:clamp(34px,5vw,52px);font-weight:900;line-height:1.06;letter-spacing:-1px;margin-bottom:20px}
.hero-text h1 .hl{background:var(--grad-accent);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-text .desc{font-size:15px;color:var(--text3);line-height:1.8;margin-bottom:34px;max-width:460px}
.hero-btns{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.hero-btns .ver{font-size:12px;color:var(--text3);margin-left:8px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;border-radius:10px;font-size:14px;font-weight:600;cursor:pointer;transition:all var(--trans);border:none;white-space:nowrap}
.btn-fill{
  background:var(--grad);color:#fff;
  box-shadow:0 6px 24px rgba(168,85,247,0.35);
  position:relative;overflow:hidden
}
.btn-fill::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(135deg,transparent 30%,rgba(255,255,255,0.12) 50%,transparent 70%);
  transform:translateX(-100%);transition:transform 0.6s
}
.btn-fill:hover::after{transform:translateX(100%)}
.btn-fill:hover{transform:translateY(-2px);box-shadow:0 12px 40px rgba(168,85,247,0.45)}
.btn-line{
  background:transparent;color:var(--text);
  border:1px solid var(--border)
}
.btn-line:hover{border-color:var(--purple);color:var(--purple-light)}
.btn-ghost{background:var(--bg3);color:var(--text);border:1px solid var(--border)}
.btn-ghost:hover{background:var(--card-hover);border-color:var(--purple)}

/* Game visual */
.game-visual{position:relative}
.game-window{
  border-radius:18px;overflow:hidden;box-shadow:var(--shadow-lg);
  background:var(--card);border:1px solid var(--border)
}
.game-topbar{
  padding:14px 18px;background:var(--bg3);
  display:flex;align-items:center;gap:10px;border-bottom:1px solid var(--border)
}
.game-dot{width:10px;height:10px;border-radius:50%}
.game-dot.r{background:#ff5f56}.game-dot.y{background:#ffbd2e}.game-dot.g{background:#27c93f}
.game-topbar span{font-size:11px;color:var(--text3)}
.game-content{padding:36px;text-align:center;min-height:200px;display:grid;place-items:center}
.game-content img{max-width:100%}
.game-fps{
  display:inline-block;margin-top:16px;padding:8px 22px;
  background:rgba(168,85,247,0.12);border:1px solid rgba(168,85,247,0.25);
  border-radius:8px;color:var(--purple-light);font-size:18px;font-weight:900
}
.game-badge{
  position:absolute;bottom:-18px;right:-14px;
  background:var(--card);border:1px solid var(--border);
  border-radius:14px;padding:14px 22px;box-shadow:var(--shadow);
  display:flex;align-items:center;gap:12px
}
.game-badge strong{font-size:14px;color:var(--purple-light)}

/* Stats strip */
.stats-strip{max-width:1240px;margin:0 auto;padding:0 32px 76px;position:relative;z-index:1}
.stats-inner{
  background:var(--grad-soft);border:1px solid var(--border);
  border-radius:var(--radius);padding:28px 44px;
  display:flex;align-items:center;justify-content:center;gap:48px;flex-wrap:wrap
}
.stats-inner .si{text-align:center}
.si .sin{font-size:30px;font-weight:900;background:var(--grad-accent);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.si .sil{font-size:11px;color:var(--text3);margin-top:4px}

/* Sections */
.sec{max-width:1240px;margin:0 auto;padding:80px 32px}
.sec-head{text-align:center;margin-bottom:56px}
.sec-head .label{
  display:inline-block;padding:5px 16px;border-radius:20px;
  background:rgba(168,85,247,0.08);border:1px solid rgba(168,85,247,0.18);
  color:var(--purple-light);font-size:12px;font-weight:700;letter-spacing:1px;margin-bottom:18px
}
.sec-head h2{font-size:clamp(28px,4vw,42px);font-weight:800;letter-spacing:-0.5px;margin-bottom:14px}
.sec-head p{color:var(--text3);font-size:15px;max-width:520px;margin:0 auto}

/* Feature grid */
.feat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.feat-card{
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);padding:32px 24px;text-align:center;
  transition:all var(--trans);position:relative;overflow:hidden
}
.feat-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:2px;
  background:var(--grad-accent);transform:scaleX(0);transform-origin:center;
  transition:transform var(--trans)
}
.feat-card:hover::before{transform:scaleX(1)}
.feat-card:hover{border-color:rgba(168,85,247,0.3);transform:translateY(-3px);box-shadow:var(--shadow-glow)}
.feat-card .fc-icon{font-size:36px;margin-bottom:16px;display:block}
.feat-card h3{font-size:16px;font-weight:700;margin-bottom:8px}
.feat-card p{font-size:13px;color:var(--text3);line-height:1.7}

/* Scenes */
.scene-zone{
  background:linear-gradient(180deg,var(--bg2),var(--bg),var(--bg2));
  border-top:1px solid var(--border);border-bottom:1px solid var(--border);
  position:relative
}
.scene-zone::before{
  content:'';position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:500px;height:500px;
  background:radial-gradient(circle,rgba(168,85,247,0.05) 0%,transparent 55%);
  border-radius:50%;pointer-events:none
}
.scene-row{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;position:relative;z-index:1}
.scene-card{
  background:rgba(168,85,247,0.03);border:1px solid var(--border);
  border-radius:var(--radius);padding:36px 26px;text-align:center;
  transition:all var(--trans)
}
.scene-card:hover{border-color:rgba(168,85,247,0.25);transform:translateY(-2px);background:rgba(168,85,247,0.05)}
.scene-card .si{font-size:40px;margin-bottom:12px;display:block}
.scene-card h3{font-size:16px;font-weight:700;margin-bottom:6px;color:var(--text)}
.scene-card p{font-size:12px;color:var(--text3)}
.scene-card .sc-tag{
  display:inline-block;margin-top:12px;padding:4px 12px;
  border-radius:20px;font-size:10px;font-weight:700;
  background:rgba(168,85,247,0.12);color:var(--purple-light)
}

/* Performance */
.perf-row{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.perf-card{
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);padding:30px 20px;text-align:center;
  transition:all var(--trans)
}
.perf-card:hover{border-color:var(--purple);transform:translateY(-2px);box-shadow:var(--shadow-glow)}
.perf-card .pn{font-size:40px;font-weight:900;background:var(--grad-accent);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:6px}
.perf-card .pl{font-size:13px;color:var(--text);margin-top:6px}
.perf-card .ps{font-size:11px;color:var(--text3);margin-top:4px}

/* FAQ */
.faq-wrap{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:10px}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden;transition:all var(--trans)}
.faq-item:hover{border-color:rgba(168,85,247,0.25)}
.faq-q{
  width:100%;padding:22px 26px;background:none;border:none;
  color:var(--text);font-size:15px;font-weight:600;text-align:left;
  cursor:pointer;display:flex;justify-content:space-between;align-items:center;
  font-family:inherit
}
.faq-q .arrow{font-size:12px;color:var(--purple-light);transition:transform var(--trans)}
.faq-a{padding:0 26px 22px;font-size:13px;color:var(--text3);line-height:1.8;display:none}
.faq-item.open .faq-a{display:block}
.faq-item.open .arrow{transform:rotate(180deg)}

/* CTA */
.cta-box{
  background:var(--grad-soft);border:1px solid var(--border);
  border-radius:var(--radius);padding:64px 48px;text-align:center
}
.cta-box h2{font-size:clamp(28px,4vw,38px);font-weight:800;margin-bottom:14px}
.cta-box p{color:var(--text3);font-size:15px;margin-bottom:30px}
.cta-box .cta-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* Footer */
.footer{background:var(--bg2);border-top:1px solid var(--border)}
.footer-grid{
  max-width:1240px;margin:0 auto;padding:56px 32px 28px;
  display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px
}
.footer-brand .fl{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:800;margin-bottom:12px}
.footer-brand .fl img{width:28px;height:28px}
.footer-brand .fl .fc{color:var(--purple-light)}
.footer-brand p{font-size:13px;color:var(--text3);line-height:1.7;max-width:260px}
.footer-col h4{font-size:13px;font-weight:700;margin-bottom:16px;color:var(--text)}
.footer-col a{display:block;font-size:12px;color:var(--text3);padding:5px 0;transition:color var(--trans)}
.footer-col a:hover{color:var(--purple-light)}
.footer-bottom{
  max-width:1240px;margin:0 auto;padding:20px 32px;
  border-top:1px solid var(--border);
  display:flex;justify-content:space-between;font-size:12px;color:var(--text3);
  flex-wrap:wrap;gap:12px
}

/* Download */
.dl-hero{padding:136px 0 60px;text-align:center;position:relative;overflow:hidden}
.dl-hero::before{
  content:'';position:absolute;top:-60px;left:50%;transform:translateX(-50%);
  width:500px;height:500px;
  background:radial-gradient(circle,rgba(168,85,247,0.06) 0%,transparent 55%);
  border-radius:50%;pointer-events:none
}
.dl-hero-inner{max-width:760px;margin:0 auto;padding:0 32px;position:relative;z-index:1}
.dl-hero-inner h1{font-size:clamp(30px,5vw,46px);font-weight:900;margin-bottom:14px}
.dl-hero-inner .dl-sub{color:var(--text3);font-size:14px;margin-bottom:20px}
.dl-meta{display:inline-flex;gap:20px;font-size:12px;color:var(--text2);flex-wrap:wrap;justify-content:center}
.dl-grid{max-width:1240px;margin:0 auto 60px;padding:0 32px;display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.dl-card{
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);padding:36px 28px;text-align:center;
  transition:all var(--trans);display:flex;flex-direction:column;gap:16px
}
.dl-card:hover{border-color:var(--purple);transform:translateY(-2px);box-shadow:var(--shadow-glow)}
.dl-card .dl-tag{display:inline-block;padding:4px 14px;border-radius:20px;font-size:11px;font-weight:700;background:rgba(168,85,247,0.1);color:var(--purple-light);align-self:center}
.dl-card h3{font-size:19px;font-weight:700}
.dl-card .dl-info{font-size:13px;color:var(--text3);line-height:1.6}
.dl-card .dl-size{font-size:11px;color:var(--text3)}
.dl-tips{max-width:1240px;margin:0 auto 60px;padding:0 32px;display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.dl-tips .tp{
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius-sm);padding:24px 20px;display:flex;gap:14px;align-items:flex-start;
  transition:all var(--trans)
}
.dl-tips .tp:hover{border-color:rgba(168,85,247,0.2)}
.tp .tp-num{
  width:30px;height:30px;border-radius:8px;
  background:rgba(168,85,247,0.1);color:var(--purple-light);
  display:grid;place-items:center;font-size:14px;font-weight:800;flex-shrink:0
}
.tp strong{display:block;font-size:14px;margin-bottom:4px}
.tp p{font-size:12px;color:var(--text3);line-height:1.6}

.specs-tbl{
  max-width:760px;margin:0 auto;background:var(--card);
  border:1px solid var(--border);border-radius:var(--radius);overflow:hidden
}
.specs-tbl .sr{display:grid;grid-template-columns:160px 1fr;border-bottom:1px solid var(--border)}
.specs-tbl .sr:last-child{border-bottom:none}
.specs-tbl .sl{padding:15px 20px;background:var(--bg3);font-size:13px;font-weight:700;color:var(--purple-light)}
.specs-tbl .sv{padding:15px 20px;font-size:13px;color:var(--text2)}

/* 404 */
.err-wrap{min-height:100vh;display:grid;place-items:center;padding:32px;background:var(--bg)}
.err-card{
  max-width:480px;text-align:center;
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);padding:60px 48px;box-shadow:var(--shadow-lg)
}
.err-card .err-icon{font-size:64px;margin-bottom:20px}
.err-card .err-num{
  font-size:clamp(90px,16vw,140px);font-weight:900;
  background:var(--grad-accent);-webkit-background-clip:text;
  -webkit-text-fill-color:transparent;background-clip:text;
  line-height:0.9;margin-bottom:10px
}
.err-card h1{font-size:20px;font-weight:700;margin-bottom:14px}
.err-card p{color:var(--text3);font-size:13px;line-height:1.7;margin-bottom:30px}
.err-card .err-btns{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}

@media(max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:48px}
  .game-visual{max-width:480px;margin:0 auto}
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .scene-row{grid-template-columns:1fr;max-width:400px;margin:0 auto}
  .perf-row{grid-template-columns:repeat(2,1fr)}
  .dl-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .nav-menu{display:none}
  .nav-toggle{display:block}
  .nav-menu.open{display:flex;flex-direction:column;position:absolute;top:64px;left:0;right:0;background:rgba(11,13,23,0.96);border-bottom:1px solid var(--border);padding:14px 24px;gap:4px;z-index:99;backdrop-filter:blur(20px)}
  .hero{padding:124px 0 56px}
  .feat-grid{grid-template-columns:1fr}
  .perf-row{grid-template-columns:1fr 1fr}
  .dl-grid,.dl-tips{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .sec{padding:54px 20px}
  .cta-box{padding:48px 24px}
  .game-badge{position:static;margin-top:16px}
}