/* 启炎智能 官网 — visionOS 空间玻璃(烟熏玻璃浮于真实环境) */
:root{
  --red:#FF7A3C; --red2:#FF5436; --grad:linear-gradient(135deg,#FF9A5A,#FF5436);
  --txt:#FFFFFF; --txt2:rgba(255,255,255,.82); --txt3:rgba(255,255,255,.6);
  --glass:rgba(38,34,30,.34); --glass2:rgba(46,42,38,.5); --glass-line:rgba(255,255,255,.22);
  --blur:saturate(150%) blur(26px);
  --radius:28px; --radius-sm:20px;
  --shadow:0 18px 50px rgba(0,0,0,.30);
  --shadow-sm:0 10px 30px rgba(0,0,0,.22);
  --hl:inset 0 1px 0 rgba(255,255,255,.3);
  --maxw:1080px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  font-family:"PingFang SC","微软雅黑","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  color:var(--txt);line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden;min-height:100vh;
  background:url("../assets/bg-spatial.jpg") center/cover fixed no-repeat,#2a2622;
}
/* 整体压暗薄纱,保证白字可读 */
body::before{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:linear-gradient(180deg,rgba(0,0,0,.28),rgba(0,0,0,.16) 35%,rgba(0,0,0,.34))}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 18px;position:relative;z-index:1}
.grid-bg,.glow{display:none!important}
h1,h2,h3,h4{text-shadow:0 1px 12px rgba(0,0,0,.25)}

/* glass 基础 */
.glass,.card,.feature,.flow-step,.hero .stat,.hero .eyebrow,.btn-ghost,.site-header .nav,.nav-menu,.site-footer,.cta-band,.brand-card{
  -webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur)}

/* ===== Header (floating glass bar) ===== */
.site-header{position:sticky;top:10px;z-index:50;margin:10px 12px 0}
.site-header .nav{background:var(--glass2);border:1px solid var(--glass-line);box-shadow:var(--shadow-sm),var(--hl);
  border-radius:26px;display:flex;align-items:center;justify-content:space-between;height:58px;padding:0 12px 0 16px;max-width:var(--maxw);margin:0 auto}
.brand{display:flex;align-items:center;gap:9px;font-weight:800;font-size:18px}
.brand .mark{width:28px;height:28px;object-fit:contain;filter:drop-shadow(0 2px 6px rgba(0,0,0,.4))}
.brand b{color:#fff}
.nav-toggle{width:40px;height:40px;border:none;background:transparent;cursor:pointer;display:flex;flex-direction:column;justify-content:center;gap:5px;padding:9px}
.nav-toggle span{height:2.5px;width:21px;background:#fff;border-radius:2px;transition:.25s}
.nav-toggle.open span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}
.nav-menu{position:fixed;left:12px;right:12px;top:78px;border-radius:24px;overflow:hidden;
  background:var(--glass2);border:1px solid var(--glass-line);box-shadow:var(--shadow),var(--hl);
  transform:translateY(-12px) scale(.97);opacity:0;visibility:hidden;transform-origin:top;transition:.28s ease}
.nav-menu.open{transform:none;opacity:1;visibility:visible}
.nav-menu a{display:block;padding:14px 22px;font-size:16px;font-weight:600;color:var(--txt2);border-top:1px solid rgba(255,255,255,.08)}
.nav-menu a:first-child{border-top:none}
.nav-menu a.active{color:#fff}
.nav-menu .menu-cta{margin:12px 16px 18px;background:var(--grad);color:#fff;text-align:center;border-radius:16px;padding:13px;border-top:none;box-shadow:0 8px 22px rgba(255,84,54,.4)}

/* ===== Buttons (pill) ===== */
.btn{display:inline-flex;align-items:center;gap:7px;font-weight:700;font-size:15px;padding:14px 28px;border-radius:999px;transition:.2s;cursor:pointer;border:none}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 12px 30px rgba(255,84,54,.42),var(--hl)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:var(--glass2);color:#fff;border:1px solid var(--glass-line);box-shadow:var(--shadow-sm)}

/* ===== Hero ===== */
.hero{position:relative;padding:54px 0 42px}
.hero .eyebrow{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;font-weight:700;color:#fff;
  background:var(--glass2);border:1px solid var(--glass-line);box-shadow:var(--shadow-sm),var(--hl);padding:8px 15px;border-radius:999px;margin-bottom:22px}
.hero .eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--red);box-shadow:0 0 10px var(--red)}
.hero h1{font-size:36px;line-height:1.2;font-weight:900;letter-spacing:-.6px;text-shadow:0 2px 20px rgba(0,0,0,.4)}
.hero h1 .hl{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;text-shadow:none}
.hero p.sub{margin-top:18px;color:var(--txt2);font-size:16px;max-width:600px;text-shadow:0 1px 12px rgba(0,0,0,.4)}
.hero .hero-cta{margin-top:28px;display:flex;gap:12px;flex-wrap:wrap}
.hero .stats{margin-top:38px;display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.hero .stat{background:var(--glass);border:1px solid var(--glass-line);box-shadow:var(--shadow-sm),var(--hl);border-radius:var(--radius-sm);padding:18px 8px;text-align:center}
.hero .stat b{display:block;font-size:23px;font-weight:900;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero .stat span{font-size:12px;color:var(--txt3)}

/* ===== Section ===== */
.section{padding:44px 0;position:relative}
.sec-head{text-align:center;max-width:640px;margin:0 auto 30px}
.sec-head .tag{font-size:12px;font-weight:800;color:var(--red);letter-spacing:2px}
.sec-head h2{font-size:27px;font-weight:900;margin-top:9px;letter-spacing:-.4px}
.sec-head p{color:var(--txt2);font-size:15px;margin-top:11px}

/* ===== Cards ===== */
.cards{display:grid;grid-template-columns:1fr;gap:15px}
.card{display:block;position:relative;overflow:hidden;border-radius:var(--radius);padding:24px 22px;transition:.3s cubic-bezier(.2,.7,.3,1);
  background:var(--glass);border:1px solid var(--glass-line);box-shadow:var(--shadow),var(--hl);color:#fff}
.card:hover{transform:translateY(-5px);background:var(--glass2);box-shadow:0 30px 70px rgba(0,0,0,.4),var(--hl)}
.card:active{transform:translateY(-2px) scale(.995)}
.card .ico{width:52px;height:52px;border-radius:17px;background:var(--glass2);border:1px solid var(--glass-line);
  display:flex;align-items:center;justify-content:center;font-size:25px;margin-bottom:16px;box-shadow:var(--hl)}
.card h3{font-size:19px;font-weight:800;color:#fff}
.card p{color:var(--txt2);font-size:14.5px;margin-top:9px}
.card .tags{margin-top:14px;display:flex;flex-wrap:wrap;gap:7px}
.card .tags span{font-size:12px;color:var(--txt2);background:rgba(255,255,255,.12);border:1px solid var(--glass-line);padding:5px 11px;border-radius:999px}
.card .more{margin-top:16px;color:var(--red);font-weight:700;font-size:14px}
.card.dark{background:linear-gradient(150deg,rgba(255,122,60,.42),rgba(255,84,54,.3));border-color:rgba(255,255,255,.3)}
.card.dark .ico{background:var(--grad);border:none;color:#fff;box-shadow:0 8px 20px rgba(255,84,54,.5)}

/* ===== Feature ===== */
.feature{display:flex;gap:15px;padding:20px;margin-bottom:12px;border-radius:var(--radius-sm);
  background:var(--glass);border:1px solid var(--glass-line);box-shadow:var(--shadow-sm),var(--hl)}
.feature .fn{flex:0 0 46px;height:46px;border-radius:15px;background:var(--grad);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:900;font-size:15px;box-shadow:0 8px 18px rgba(255,84,54,.4)}
.feature h4{font-size:17px;font-weight:800;color:#fff}
.feature p{color:var(--txt2);font-size:14.5px;margin-top:5px}

/* ===== Flow ===== */
.flow{display:flex;flex-direction:column}
.flow-step{border-radius:var(--radius-sm);padding:18px;background:var(--glass);border:1px solid var(--glass-line);box-shadow:var(--shadow-sm),var(--hl)}
.flow-arrow{height:26px;display:flex;align-items:center;justify-content:center;color:var(--red);font-size:18px}
.flow-step .s-t{font-weight:800;font-size:16px;color:#fff}
.flow-step .s-d{color:var(--txt2);font-size:13.5px;margin-top:4px}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.chips span{font-size:13px;font-weight:600;background:rgba(255,255,255,.14);color:#fff;border:1px solid var(--glass-line);padding:7px 13px;border-radius:999px}

/* ===== CTA band ===== */
.cta-band{position:relative;margin:44px 14px;border-radius:30px;overflow:hidden;text-align:center;padding:48px 22px;
  background:linear-gradient(150deg,rgba(255,122,60,.45),rgba(255,84,54,.32));border:1px solid var(--glass-line);box-shadow:var(--shadow),var(--hl)}
.cta-band h2{font-size:25px;font-weight:900;color:#fff}
.cta-band p{margin-top:10px;color:rgba(255,255,255,.9);font-size:15px}
.cta-band .btn{margin-top:24px;background:#fff;color:#E2231A;box-shadow:0 12px 30px rgba(0,0,0,.25)}

/* ===== Page hero ===== */
.page-hero{position:relative;padding:36px 0 24px}
.page-hero .crumb{font-size:13px;color:var(--txt3)}
.page-hero .crumb a{color:var(--red)}
.page-hero h1{font-size:30px;font-weight:900;margin-top:10px;letter-spacing:-.5px;text-shadow:0 2px 18px rgba(0,0,0,.4)}
.page-hero p{color:var(--txt2);margin-top:12px;font-size:15px;max-width:660px}

/* ===== Footer ===== */
.site-footer{margin:6px 12px 14px;border-radius:28px;padding:34px 24px 26px;background:var(--glass);border:1px solid var(--glass-line);box-shadow:var(--shadow),var(--hl)}
.site-footer .f-brand{display:flex;align-items:center;gap:9px;color:#fff;font-weight:800;font-size:17px;margin-bottom:13px}
.site-footer .f-brand img{width:26px;height:26px;filter:drop-shadow(0 2px 6px rgba(0,0,0,.4))}
.site-footer p{font-size:13.5px;line-height:1.9;color:var(--txt2)}
.site-footer .f-nav{display:flex;flex-wrap:wrap;gap:12px 18px;margin:18px 0}
.site-footer .f-nav a{font-size:14px;color:var(--txt2)}
.site-footer .f-contact{font-size:13.5px;margin-top:12px;color:var(--txt2)}
.site-footer .f-contact b{color:#fff}
.site-footer .copy{border-top:1px solid rgba(255,255,255,.12);margin-top:20px;padding-top:16px;font-size:12.5px;color:var(--txt3)}

/* about logo card */
.brand-card{background:var(--glass2);border:1px solid var(--glass-line);border-radius:26px;padding:22px 30px;max-width:260px;margin:0 auto 6px;box-shadow:var(--shadow),var(--hl)}

/* reveal */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}

/* ===== Desktop ===== */
@media(min-width:860px){
  .nav-toggle{display:none}
  .nav-menu{position:static;left:auto;right:auto;top:auto;display:flex;align-items:center;gap:4px;background:transparent;-webkit-backdrop-filter:none;backdrop-filter:none;border:none;box-shadow:none;transform:none;opacity:1;visibility:visible;overflow:visible}
  .nav-menu a{border-top:none;padding:8px 14px;font-size:15px}
  .nav-menu .menu-cta{margin:0 0 0 8px;padding:9px 18px;box-shadow:0 8px 22px rgba(255,84,54,.4)}
  .hero{padding:96px 0 78px}
  .hero h1{font-size:56px}
  .hero p.sub{font-size:18px}
  .hero .stats{max-width:560px}
  .sec-head h2{font-size:34px}
  .cards{grid-template-columns:repeat(3,1fr)}
  .cards.two{grid-template-columns:repeat(2,1fr)}
  .page-hero h1{font-size:42px}
  .cta-band{margin:56px auto;max-width:var(--maxw)}
}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}