/* ===== 蒙霁空天 全局样式 ===== */
:root{
  --bg:#0B0D10;
  --bg-2:#111418;
  --bg-3:#1A1E24;
  --ink:#F2EFE6;
  --ink-2:rgba(242,239,230,0.72);
  --ink-3:rgba(242,239,230,0.48);
  --ink-4:rgba(242,239,230,0.18);
  --line:rgba(242,239,230,0.10);
  --line-2:rgba(242,239,230,0.18);
  --gold:#C8A96E;
  --gold-2:#E2C994;
  --warm:#7D6B3D;
  --serif:'Noto Serif SC','Songti SC',Georgia,serif;
  --sans:'Noto Sans SC',-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;
  --mono:'JetBrains Mono',ui-monospace,monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--bg);color:var(--ink);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}

/* ====== TOPBAR ====== */
.topbar{position:fixed;top:0;left:0;right:0;z-index:100;display:flex;align-items:center;justify-content:space-between;padding:18px 56px;background:linear-gradient(to bottom,rgba(11,13,16,0.85),rgba(11,13,16,0));backdrop-filter:blur(8px);transition:all .35s ease}
.topbar.scrolled,body.subpage .topbar{background:rgba(11,13,16,0.94);border-bottom:1px solid var(--line);padding:12px 56px}
.brand{display:flex;align-items:center;gap:14px}
.brand img{width:36px;height:36px;border-radius:50%;background:rgba(255,255,255,0.92);padding:3px;object-fit:contain}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-cn{font-family:var(--serif);font-size:17px;font-weight:700;letter-spacing:3px;color:var(--ink)}
.brand-en{font-family:var(--mono);font-size:9px;letter-spacing:2px;color:var(--ink-3);margin-top:3px;text-transform:uppercase}
.nav{display:flex;align-items:center;gap:0}
.nav-item{position:relative;padding:14px 18px}
.nav-item>a{font-size:13px;color:var(--ink-2);letter-spacing:1.5px;transition:color .25s}
.nav-item:hover>a,.nav-item.active>a{color:var(--gold)}
.nav-item .dd{position:absolute;top:100%;left:0;min-width:200px;background:rgba(17,20,24,0.96);backdrop-filter:blur(12px);border:1px solid var(--line);padding:8px 0;opacity:0;pointer-events:none;transform:translateY(8px);transition:all .25s ease}
.nav-item:hover .dd{opacity:1;pointer-events:auto;transform:translateY(0)}
.dd a{display:block;padding:9px 22px;font-size:13px;color:var(--ink-2);transition:all .2s;white-space:nowrap}
.dd a:hover{color:var(--gold);background:rgba(200,169,110,0.06)}
.topbar-right{display:flex;align-items:center;gap:18px;font-family:var(--mono);font-size:12px;color:var(--gold);letter-spacing:1px}
.topbar-right .dot{width:6px;height:6px;border-radius:50%;background:var(--gold);box-shadow:0 0 12px var(--gold)}

/* ====== BUTTONS ====== */
.btn{display:inline-flex;align-items:center;gap:12px;padding:16px 32px;font-family:var(--sans);font-size:13px;font-weight:500;letter-spacing:2px;border:none;cursor:pointer;transition:all .3s ease}
.btn.primary{background:var(--gold);color:#0B0D10}
.btn.primary:hover{background:var(--gold-2);transform:translateY(-2px)}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line-2)}
.btn.ghost:hover{border-color:var(--gold);color:var(--gold)}
.btn .arr{display:inline-block;transition:transform .3s}
.btn:hover .arr{transform:translateX(4px)}

/* ====== SECTION BASE ====== */
section{position:relative;padding:120px 56px}
.container{max-width:1400px;margin:0 auto}
.eyebrow{display:flex;align-items:center;gap:14px;font-family:var(--mono);font-size:11px;letter-spacing:3px;color:var(--gold);text-transform:uppercase;margin-bottom:24px}
.eyebrow .bar{width:32px;height:1px;background:var(--gold)}
.eyebrow .num{color:var(--ink-3)}
h2{font-family:var(--serif);font-size:clamp(36px,4.5vw,56px);font-weight:700;letter-spacing:4px;line-height:1.2;color:var(--ink)}
h2 .accent{color:var(--gold)}
.sec-desc{font-size:15px;color:var(--ink-2);line-height:1.9;max-width:480px;letter-spacing:1px}
.sec-header{display:flex;justify-content:space-between;align-items:flex-end;gap:40px;margin-bottom:80px;flex-wrap:wrap}
.sec-header-l{max-width:680px}

/* ====== PAGE BANNER (subpages) ====== */
.page-banner{position:relative;padding:200px 56px 100px;background:#000;overflow:hidden;min-height:50vh;display:flex;align-items:flex-end}
.page-banner::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(11,13,16,0.92),rgba(11,13,16,0.55) 60%,rgba(200,169,110,0.15));z-index:1}
.page-banner-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(242,239,230,0.04) 1px,transparent 1px),linear-gradient(90deg,rgba(242,239,230,0.04) 1px,transparent 1px);background-size:80px 80px;z-index:1;mask-image:linear-gradient(to bottom,transparent,black 40%,black 80%,transparent)}
.page-banner-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0.55}
.page-banner-content{position:relative;z-index:2;max-width:1400px;width:100%;margin:0 auto}
.crumb{display:flex;align-items:center;gap:10px;font-family:var(--mono);font-size:11px;color:var(--ink-3);letter-spacing:1.5px;margin-bottom:24px;text-transform:uppercase}
.crumb a{color:var(--ink-3);transition:color .2s}
.crumb a:hover{color:var(--gold)}
.crumb .sep{color:var(--ink-4)}
.crumb .here{color:var(--gold)}
.page-banner h1{font-family:var(--serif);font-size:clamp(40px,5.5vw,72px);font-weight:900;letter-spacing:6px;line-height:1.1;color:var(--ink);margin-bottom:20px}
.page-banner h1 .accent{color:var(--gold)}
.page-banner-sub{font-family:var(--serif);font-size:18px;letter-spacing:3px;color:var(--ink-2);max-width:680px;line-height:1.7}

/* ====== FOOTER ====== */
footer{padding:80px 56px 40px;background:#06080A;color:var(--ink-2)}
.footer-grid{max-width:1400px;margin:0 auto;display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr 1.2fr;gap:48px;margin-bottom:60px}
.footer-brand{display:flex;flex-direction:column;gap:18px}
.footer-brand .logo{display:flex;align-items:center;gap:12px}
.footer-brand .logo img{width:40px;height:40px;border-radius:50%;background:rgba(255,255,255,0.92);padding:4px;object-fit:contain}
.footer-brand .logo-text{display:flex;flex-direction:column;line-height:1.2}
.footer-brand .logo-text .cn{font-family:var(--serif);font-size:18px;color:var(--ink);letter-spacing:3px;font-weight:700}
.footer-brand .logo-text .en{font-family:var(--mono);font-size:9px;color:var(--ink-3);letter-spacing:2px;text-transform:uppercase;margin-top:3px}
.footer-brand p{font-size:13px;color:var(--ink-3);line-height:1.8;max-width:320px}
.footer-col h4{font-family:var(--mono);font-size:11px;color:var(--gold);letter-spacing:2px;margin-bottom:20px;text-transform:uppercase}
.footer-col a{display:block;font-size:13px;color:var(--ink-2);margin-bottom:12px;transition:color .25s;letter-spacing:1px}
.footer-col a:hover{color:var(--gold)}
.footer-col p{font-size:13px;color:var(--ink-2);margin-bottom:12px;letter-spacing:1px;line-height:1.7}
.footer-col p strong{color:var(--ink)}
.footer-col .phone{font-family:var(--serif);font-size:22px;color:var(--gold);font-weight:700;letter-spacing:2px;margin-top:6px}
.footer-bottom{max-width:1400px;margin:0 auto;padding-top:32px;border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;font-family:var(--mono);font-size:11px;color:var(--ink-3);letter-spacing:1px}
.footer-bottom .meta{display:flex;gap:24px;flex-wrap:wrap}

/* ====== CARDS / GENERIC ====== */
.card-grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.card-grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card-grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}

/* hero homepage */
.hero{position:relative;min-height:100vh;display:flex;align-items:flex-end;padding:0 56px 80px;overflow:hidden;background:#000}
.hero-bg{position:absolute;inset:0;background:url('../images/hero-bg.png') center/cover no-repeat;opacity:0.85;transform:scale(1.05)}
.hero::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 60% 50% at 70% 20%,rgba(200,169,110,0.18),transparent 60%),linear-gradient(to right,rgba(11,13,16,0.85) 0%,rgba(11,13,16,0.4) 50%,rgba(11,13,16,0.7) 100%),linear-gradient(to bottom,rgba(11,13,16,0.5) 0%,rgba(11,13,16,0.2) 40%,var(--bg) 100%);z-index:1}
.hero-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(242,239,230,0.04) 1px,transparent 1px),linear-gradient(90deg,rgba(242,239,230,0.04) 1px,transparent 1px);background-size:80px 80px;z-index:1;mask-image:linear-gradient(to bottom,transparent,black 30%,black 80%,transparent)}
.hero-content{position:relative;z-index:2;max-width:1400px;width:100%}
.hero-eyebrow{display:inline-flex;align-items:center;gap:14px;font-family:var(--mono);font-size:11px;letter-spacing:3px;color:var(--gold);text-transform:uppercase;margin-bottom:32px}
.hero-eyebrow .bar{width:48px;height:1px;background:var(--gold)}
.hero h1{font-family:var(--serif);font-size:clamp(48px,7vw,96px);font-weight:900;line-height:1.05;letter-spacing:6px;margin-bottom:28px;color:var(--ink)}
.hero h1 .accent{color:var(--gold);font-weight:700}
.hero h1 .sep{display:inline-block;margin:0 16px;color:var(--ink-4);font-weight:300}
.hero-sub{font-family:var(--serif);font-size:22px;color:var(--ink-2);letter-spacing:4px;line-height:1.6;max-width:620px;margin-bottom:48px}
.hero-meta{display:flex;gap:48px;align-items:flex-end;padding-top:32px;border-top:1px solid var(--line);max-width:780px}
.hero-meta-item{display:flex;flex-direction:column;gap:6px}
.hero-meta-label{font-family:var(--mono);font-size:10px;letter-spacing:2px;color:var(--ink-3);text-transform:uppercase}
.hero-meta-value{font-family:var(--serif);font-size:18px;color:var(--ink);letter-spacing:2px}
.hero-meta-value .num{font-family:var(--serif);color:var(--gold);font-size:32px;font-weight:700;display:inline-block;margin-right:4px}
.hero-cta{display:flex;gap:14px;margin-top:40px}
.hero-plate{position:absolute;right:56px;top:140px;z-index:3;border:1px solid var(--line-2);padding:18px 22px;background:rgba(11,13,16,0.55);backdrop-filter:blur(8px);max-width:280px}
.hero-plate .plate-label{font-family:var(--mono);font-size:9px;letter-spacing:2px;color:var(--gold);text-transform:uppercase;margin-bottom:8px}
.hero-plate .plate-title{font-family:var(--serif);font-size:14px;color:var(--ink);letter-spacing:1px;margin-bottom:6px}
.hero-plate .plate-no{font-family:var(--mono);font-size:11px;color:var(--ink-2);letter-spacing:1px}

/* stats */
.stats{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:60px 56px}
.stats-grid{max-width:1400px;margin:0 auto;display:grid;grid-template-columns:repeat(5,1fr);gap:0}
.stat{padding:0 32px;text-align:left;border-right:1px solid var(--line)}
.stat:last-child{border-right:none}
.stat-num{font-family:var(--serif);font-size:42px;font-weight:700;color:var(--gold);letter-spacing:2px;margin-bottom:8px;line-height:1}
.stat-num .unit{font-size:18px;color:var(--ink-2);font-weight:400;margin-left:4px}
.stat-label{font-family:var(--sans);font-size:13px;color:var(--ink-2);letter-spacing:2px}
.stat-sub{font-family:var(--mono);font-size:10px;color:var(--ink-3);letter-spacing:1px;margin-top:6px;text-transform:uppercase}

/* business quadrant on homepage */
.biz-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.biz-card{padding:48px 40px;background:var(--bg);transition:background .35s ease;position:relative;overflow:hidden;display:block}
.biz-card::before{content:'';position:absolute;left:0;top:0;width:0;height:1px;background:var(--gold);transition:width .5s ease}
.biz-card:hover{background:var(--bg-2)}
.biz-card:hover::before{width:100%}
.biz-num{font-family:var(--mono);font-size:11px;color:var(--gold);letter-spacing:3px;margin-bottom:24px}
.biz-title{font-family:var(--serif);font-size:30px;font-weight:700;letter-spacing:3px;color:var(--ink);margin-bottom:14px}
.biz-title-en{font-family:var(--mono);font-size:11px;color:var(--ink-3);letter-spacing:2px;text-transform:uppercase;margin-bottom:20px}
.biz-desc{font-size:14px;color:var(--ink-2);line-height:1.9;margin-bottom:28px}
.biz-link{font-family:var(--mono);font-size:11px;color:var(--gold);letter-spacing:2px;display:inline-flex;align-items:center;gap:10px;text-transform:uppercase;padding-bottom:6px;border-bottom:1px solid var(--gold);transition:gap .3s}
.biz-card:hover .biz-link{gap:18px}

/* product feature card on homepage */
.prod-promo{display:grid;grid-template-columns:1.3fr 1fr;gap:48px;align-items:center;background:var(--bg-2);border:1px solid var(--line);padding:48px;margin-bottom:24px}
.prod-promo-img{position:relative;aspect-ratio:16/10;background:linear-gradient(135deg,#1A1E24,#0F1216);display:flex;align-items:center;justify-content:center;overflow:hidden;border:1px solid var(--line)}
.prod-promo-img::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 70% 50%,rgba(200,169,110,0.15),transparent 60%)}
.prod-promo-img img{position:relative;z-index:1;width:85%;max-height:80%;object-fit:contain;filter:drop-shadow(0 30px 60px rgba(0,0,0,0.5))}
.prod-promo-tag{position:absolute;top:20px;left:20px;font-family:var(--mono);font-size:10px;letter-spacing:2px;color:var(--gold);text-transform:uppercase;padding:6px 12px;border:1px solid var(--gold)}
.prod-promo-body .model{font-family:var(--mono);font-size:12px;color:var(--gold);letter-spacing:3px;margin-bottom:14px}
.prod-promo-body h3{font-family:var(--serif);font-size:36px;font-weight:700;letter-spacing:3px;line-height:1.2;color:var(--ink);margin-bottom:20px}
.prod-promo-body p{font-size:14px;color:var(--ink-2);line-height:1.9;margin-bottom:28px}

/* product card */
.prod-card{background:var(--bg);border:1px solid var(--line);overflow:hidden;transition:all .35s ease;display:flex;flex-direction:column}
.prod-card:hover{border-color:var(--gold);transform:translateY(-4px)}
.prod-card-img{aspect-ratio:4/3;background:linear-gradient(135deg,#161A1F,#0E1115);display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}
.prod-card-img::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at center,rgba(200,169,110,0.08),transparent 70%)}
.prod-card-img img{position:relative;z-index:1;width:75%;max-height:75%;object-fit:contain;filter:drop-shadow(0 14px 28px rgba(0,0,0,0.4))}
.prod-card-tag{position:absolute;top:16px;left:16px;z-index:2;font-family:var(--mono);font-size:9px;letter-spacing:2px;color:var(--gold);text-transform:uppercase;padding:4px 8px;border:1px solid var(--gold)}
.prod-card-body{padding:28px 24px;flex:1;display:flex;flex-direction:column}
.prod-card-model{font-family:var(--mono);font-size:11px;color:var(--gold);letter-spacing:2px;margin-bottom:10px}
.prod-card-title{font-family:var(--serif);font-size:20px;color:var(--ink);letter-spacing:2px;font-weight:700;margin-bottom:14px}
.prod-card-desc{font-size:13px;color:var(--ink-3);line-height:1.7;margin-bottom:20px;flex:1}
.prod-card-specs{display:flex;gap:16px;padding-top:16px;border-top:1px solid var(--line)}
.prod-card-spec{flex:1}
.prod-card-spec-l{font-family:var(--mono);font-size:9px;color:var(--ink-3);letter-spacing:1px;text-transform:uppercase;margin-bottom:4px}
.prod-card-spec-v{font-family:var(--serif);font-size:15px;color:var(--ink);font-weight:600}

/* news on homepage */
.news-list{display:flex;flex-direction:column}
.news-item{padding:24px 0;border-bottom:1px solid var(--line);display:flex;flex-direction:column;gap:8px;transition:all .3s ease;cursor:pointer}
.news-item:hover{border-bottom-color:var(--gold)}
.news-meta{display:flex;gap:14px;align-items:center;font-family:var(--mono);font-size:11px;color:var(--ink-3);letter-spacing:1px}
.news-meta .cat{color:var(--gold);text-transform:uppercase}
.news-title{font-family:var(--serif);font-size:18px;color:var(--ink);letter-spacing:1px;line-height:1.5;font-weight:500;transition:color .3s}
.news-item:hover .news-title{color:var(--gold)}
.news-excerpt{font-size:13px;color:var(--ink-3);line-height:1.7;margin-top:6px}

/* CTA band */
.cta-band{padding:120px 56px;background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);text-align:center;position:relative;overflow:hidden}
.cta-band::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 60% 50% at 50% 50%,rgba(200,169,110,0.12),transparent 70%)}
.cta-band-inner{position:relative;z-index:1;max-width:900px;margin:0 auto}
.cta-eyebrow{font-family:var(--mono);font-size:11px;color:var(--gold);letter-spacing:4px;margin-bottom:24px;text-transform:uppercase}
.cta-band h2{font-size:clamp(36px,5vw,64px);margin-bottom:24px;letter-spacing:6px}
.cta-band p{font-size:16px;color:var(--ink-2);max-width:540px;margin:0 auto 48px;line-height:2}
.cta-band .actions{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}

/* === ABOUT page === */
.about-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:80px;align-items:center}
.about-image{position:relative;aspect-ratio:4/5;background:var(--bg-2);border:1px solid var(--line);overflow:hidden}
.about-image img{width:100%;height:100%;object-fit:cover;filter:contrast(1.05) saturate(0.9)}
.about-image::after{content:'';position:absolute;inset:0;background:linear-gradient(to top,rgba(11,13,16,0.4),transparent 50%)}
.about-image-tag{position:absolute;left:24px;bottom:24px;font-family:var(--mono);font-size:10px;letter-spacing:2px;color:var(--ink-2);text-transform:uppercase;border-left:2px solid var(--gold);padding-left:10px}
.about-body p{font-size:16px;color:var(--ink-2);line-height:2;margin-bottom:24px}
.about-body p strong{color:var(--ink);font-weight:500}
.pillars{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:48px;padding-top:40px;border-top:1px solid var(--line)}
.pillar{display:flex;flex-direction:column;gap:8px}
.pillar-num{font-family:var(--mono);font-size:11px;color:var(--gold);letter-spacing:2px}
.pillar-title{font-family:var(--serif);font-size:18px;color:var(--ink);letter-spacing:2px;font-weight:700}
.pillar-desc{font-size:13px;color:var(--ink-3);line-height:1.7}

/* timeline */
.timeline{display:flex;flex-direction:column;gap:0;border-left:1px solid var(--line);padding-left:48px;margin-top:24px}
.tl-item{position:relative;padding:32px 0}
.tl-item::before{content:'';position:absolute;left:-54px;top:38px;width:12px;height:12px;border-radius:50%;background:var(--gold);box-shadow:0 0 0 4px var(--bg)}
.tl-year{font-family:var(--mono);font-size:14px;color:var(--gold);letter-spacing:3px;margin-bottom:8px}
.tl-title{font-family:var(--serif);font-size:22px;color:var(--ink);letter-spacing:2px;font-weight:700;margin-bottom:10px}
.tl-desc{font-size:14px;color:var(--ink-2);line-height:1.9;max-width:680px}

/* === PRODUCTS page === */
.prod-tabs{display:flex;gap:0;margin-bottom:48px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.prod-tab{padding:18px 24px;font-size:13px;letter-spacing:2px;color:var(--ink-3);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-1px;transition:all .25s;font-family:var(--sans);background:none;border-left:none;border-right:none;border-top:none}
.prod-tab.active{color:var(--gold);border-bottom-color:var(--gold)}
.prod-tab:hover{color:var(--ink-2)}
.prod-tab .num{font-family:var(--mono);font-size:10px;color:var(--ink-4);margin-right:8px}

.prod-detail{display:grid;grid-template-columns:1.3fr 1fr;gap:64px;align-items:center;margin-bottom:80px}
.prod-detail-img{position:relative;aspect-ratio:16/10;background:linear-gradient(135deg,#1A1E24,#0F1216);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;overflow:hidden}
.prod-detail-img::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 70% 50%,rgba(200,169,110,0.15),transparent 60%)}
.prod-detail-img img{position:relative;z-index:1;width:85%;max-height:80%;object-fit:contain;filter:drop-shadow(0 30px 60px rgba(0,0,0,0.5))}
.prod-detail-tag{position:absolute;top:24px;left:24px;font-family:var(--mono);font-size:10px;letter-spacing:2px;color:var(--gold);text-transform:uppercase;padding:6px 12px;border:1px solid var(--gold)}
.prod-detail-id{position:absolute;bottom:24px;right:24px;font-family:var(--mono);font-size:11px;letter-spacing:2px;color:var(--ink-3)}
.prod-detail-body .model{font-family:var(--mono);font-size:12px;color:var(--gold);letter-spacing:3px;margin-bottom:14px}
.prod-detail-body h3{font-family:var(--serif);font-size:42px;font-weight:700;letter-spacing:3px;line-height:1.2;color:var(--ink);margin-bottom:24px}
.prod-detail-body p{font-size:15px;color:var(--ink-2);line-height:1.9;margin-bottom:36px}
.specs{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-bottom:36px}
.spec{padding:20px 22px;background:var(--bg-2)}
.spec-label{font-family:var(--mono);font-size:10px;color:var(--ink-3);letter-spacing:2px;text-transform:uppercase;margin-bottom:6px}
.spec-value{font-family:var(--serif);font-size:18px;color:var(--ink);letter-spacing:1px;font-weight:500}
.spec-value .unit{font-family:var(--mono);font-size:12px;color:var(--ink-2);margin-left:4px;font-weight:400}

/* training cards */
.train-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:32px}
.train-card{background:var(--bg);border:1px solid var(--line);padding:48px 44px;position:relative;overflow:hidden;transition:all .35s ease}
.train-card:hover{border-color:var(--gold)}
.train-card .top-line{display:flex;justify-content:space-between;align-items:center;margin-bottom:32px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.train-tag{font-family:var(--mono);font-size:11px;color:var(--gold);letter-spacing:2px}
.train-cert{font-family:var(--mono);font-size:10px;color:var(--ink-3);letter-spacing:1px}
.train-card h3{font-family:var(--serif);font-size:28px;font-weight:700;letter-spacing:3px;color:var(--ink);margin-bottom:14px}
.train-card p{font-size:14px;color:var(--ink-2);line-height:1.9;margin-bottom:32px}
.train-rates{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:32px}
.rate{padding:20px;background:var(--bg-2);border:1px solid var(--line)}
.rate-cls{font-family:var(--mono);font-size:10px;color:var(--ink-3);letter-spacing:2px;margin-bottom:6px}
.rate-name{font-family:var(--serif);font-size:14px;color:var(--ink);margin-bottom:14px;letter-spacing:1px}
.rate-price{font-family:var(--serif);font-size:28px;color:var(--gold);font-weight:700;letter-spacing:1px}
.rate-price .yuan{font-size:14px;color:var(--ink-2);margin-right:2px}
.rate-price .per{font-family:var(--mono);font-size:11px;color:var(--ink-3);margin-left:4px}
.train-meta{display:flex;gap:24px;flex-wrap:wrap}
.train-meta-item{flex:1;min-width:120px}
.train-meta-l{font-family:var(--mono);font-size:10px;color:var(--ink-3);letter-spacing:1px;text-transform:uppercase;margin-bottom:4px}
.train-meta-v{font-family:var(--serif);font-size:16px;color:var(--ink);font-weight:600}

/* scenarios */
.scen{padding:48px 36px;background:var(--bg);transition:background .3s ease;position:relative;overflow:hidden}
.scen:hover{background:var(--bg-2)}
.scen-num{font-family:var(--mono);font-size:10px;color:var(--gold);letter-spacing:2px;margin-bottom:24px}
.scen-glyph{width:48px;height:48px;margin-bottom:32px;border:1px solid var(--gold);display:flex;align-items:center;justify-content:center;color:var(--gold)}
.scen h4{font-family:var(--serif);font-size:20px;letter-spacing:2px;color:var(--ink);margin-bottom:10px;font-weight:700}
.scen-en{font-family:var(--mono);font-size:10px;color:var(--ink-3);letter-spacing:2px;margin-bottom:20px;text-transform:uppercase}
.scen p{font-size:13px;color:var(--ink-2);line-height:1.8}

/* base / facility */
.base-zones{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line-2);border:1px solid var(--line-2)}
.zone{padding:24px 20px;background:var(--bg-2)}
.zone-num{font-family:var(--mono);font-size:10px;color:var(--gold);letter-spacing:2px;margin-bottom:8px}
.zone-title{font-family:var(--serif);font-size:14px;color:var(--ink);letter-spacing:1px;font-weight:600}
.b-stat{border-left:2px solid var(--gold);padding:8px 0 8px 28px;margin-bottom:32px}
.b-stat-num{font-family:var(--serif);font-size:48px;color:var(--gold);font-weight:700;letter-spacing:2px;line-height:1}
.b-stat-num .unit{font-size:18px;color:var(--ink-2);font-weight:400;margin-left:4px}
.b-stat-label{font-family:var(--sans);font-size:14px;color:var(--ink);letter-spacing:2px;margin-top:8px}
.b-stat-sub{font-family:var(--mono);font-size:10px;color:var(--ink-3);letter-spacing:1px;margin-top:4px;text-transform:uppercase}

/* cases list */
.case-list{display:flex;flex-direction:column;border-top:1px solid var(--line)}
.case{display:grid;grid-template-columns:80px 1fr 2fr 1fr 60px;gap:32px;padding:36px 0;border-bottom:1px solid var(--line);align-items:center;transition:all .3s ease}
.case:hover{padding-left:24px;background:linear-gradient(to right,rgba(200,169,110,0.04),transparent 60%)}
.case-no{font-family:var(--mono);font-size:14px;color:var(--gold);letter-spacing:2px}
.case-tag{display:inline-block;font-family:var(--mono);font-size:10px;color:var(--ink-2);letter-spacing:2px;text-transform:uppercase;padding:5px 10px;border:1px solid var(--line-2);width:fit-content}
.case-title{font-family:var(--serif);font-size:20px;color:var(--ink);letter-spacing:2px;font-weight:700}
.case-title .sub{display:block;font-family:var(--sans);font-size:12px;color:var(--ink-3);letter-spacing:1px;margin-top:4px;font-weight:400}
.case-region{font-family:var(--mono);font-size:11px;color:var(--ink-2);letter-spacing:1px}
.case-arrow{color:var(--ink-3);justify-self:end;transition:all .3s}
.case:hover .case-arrow{color:var(--gold);transform:translateX(8px)}

/* contact */
.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:80px;align-items:start}
.contact-info p{font-size:15px;color:var(--ink-2);line-height:2;margin-bottom:18px}
.contact-block{padding:28px 0;border-top:1px solid var(--line)}
.contact-block:last-child{border-bottom:1px solid var(--line)}
.contact-label{font-family:var(--mono);font-size:11px;color:var(--gold);letter-spacing:2px;text-transform:uppercase;margin-bottom:10px}
.contact-value{font-family:var(--serif);font-size:18px;color:var(--ink);letter-spacing:1.5px;line-height:1.6}
.contact-value.big{font-size:32px;color:var(--gold);font-weight:700;letter-spacing:3px}
.form{background:var(--bg-2);border:1px solid var(--line);padding:48px 44px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:20px}
.form-field{display:flex;flex-direction:column;gap:8px}
.form-field label{font-family:var(--mono);font-size:10px;color:var(--ink-3);letter-spacing:2px;text-transform:uppercase}
.form-field input,.form-field select,.form-field textarea{background:var(--bg);border:1px solid var(--line-2);padding:14px 16px;color:var(--ink);font-family:var(--sans);font-size:14px;letter-spacing:1px;transition:border-color .25s}
.form-field input:focus,.form-field select:focus,.form-field textarea:focus{outline:none;border-color:var(--gold)}
.form-field textarea{min-height:120px;resize:vertical}

/* certificate doc */
.cert-doc{aspect-ratio:5/7;background:linear-gradient(135deg,#F2EFE6 0%,#E8E3D5 100%);border:1px solid var(--line-2);padding:48px 40px;color:#2D2926;font-family:var(--serif);position:relative;overflow:hidden;display:flex;flex-direction:column;box-shadow:0 30px 80px rgba(0,0,0,0.4)}
.cert-doc::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 50% 100%,rgba(200,169,110,0.18),transparent 60%)}
.cert-stamp{position:absolute;right:48px;bottom:80px;width:140px;height:140px;border-radius:50%;border:3px solid #B33B2E;color:#B33B2E;display:flex;align-items:center;justify-content:center;font-family:var(--serif);font-size:13px;font-weight:700;letter-spacing:1px;transform:rotate(-12deg);opacity:0.85;text-align:center;line-height:1.4;background:radial-gradient(circle,rgba(179,59,46,0.05),transparent)}
.cert-emblem{width:60px;height:60px;border-radius:50%;background:#B33B2E;color:#F5C26B;display:flex;align-items:center;justify-content:center;font-family:var(--serif);font-size:12px;font-weight:700;letter-spacing:2px;margin:0 auto 24px;flex-shrink:0;text-align:center;line-height:1.2}
.cert-title-cn{text-align:center;font-size:24px;font-weight:700;letter-spacing:8px;margin-bottom:8px}
.cert-title-en{text-align:center;font-family:var(--mono);font-size:9px;letter-spacing:2px;color:#6B665F;margin-bottom:48px;text-transform:uppercase}
.cert-row{display:flex;justify-content:space-between;font-size:13px;margin-bottom:16px;letter-spacing:1px;position:relative;z-index:1}
.cert-row .key{color:#6B665F;flex-shrink:0;margin-right:16px}
.cert-row .val{color:#2D2926;font-weight:500;text-align:right;font-family:var(--mono);font-size:12px}
.cert-divider{height:1px;background:#B33B2E;opacity:0.3;margin:24px 0;position:relative;z-index:1}
.cert-issuer{margin-top:auto;text-align:center;font-size:14px;font-weight:700;letter-spacing:2px;position:relative;z-index:1}

/* security/anti-drone */
.sec-photo{position:relative;aspect-ratio:4/3;overflow:hidden;border:1px solid var(--line)}
.sec-photo img{width:100%;height:100%;object-fit:cover;filter:contrast(1.1) saturate(0.85)}
.sec-photo::after{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(11,13,16,0.2) 0%,transparent 50%,rgba(11,13,16,0.6) 100%)}
.sec-photo-meta{position:absolute;left:24px;bottom:24px;right:24px;z-index:2}
.sec-photo-meta .label{font-family:var(--mono);font-size:10px;color:var(--gold);letter-spacing:2px;text-transform:uppercase;margin-bottom:6px}
.sec-photo-meta .title{font-family:var(--serif);font-size:22px;color:var(--ink);letter-spacing:2px;font-weight:700}
.freq-row{display:grid;grid-template-columns:repeat(5,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-top:48px}
.freq{padding:24px;background:var(--bg);text-align:center}
.freq-band{font-family:var(--mono);font-size:18px;color:var(--gold);font-weight:500;letter-spacing:1px;margin-bottom:6px}
.freq-label{font-family:var(--mono);font-size:10px;color:var(--ink-3);letter-spacing:1px;text-transform:uppercase}

/* scen grid */
.scen-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.partner-row{display:grid;grid-template-columns:repeat(6,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.partner{padding:36px 20px;background:var(--bg);display:flex;align-items:center;justify-content:center;text-align:center;font-family:var(--serif);font-size:13px;color:var(--ink-2);letter-spacing:1px;line-height:1.5;min-height:100px;transition:all .3s}
.partner:hover{background:var(--bg-2);color:var(--gold)}

/* honor row */
.honor-list{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-top:48px}
.honor{display:flex;gap:20px;padding:24px;background:var(--bg-2);border:1px solid var(--line);align-items:center}
.honor-year{font-family:var(--mono);font-size:14px;color:var(--gold);letter-spacing:2px;flex-shrink:0;width:60px}
.honor-title{font-family:var(--serif);font-size:15px;color:var(--ink);letter-spacing:1px;line-height:1.6}

/* faq */
.faq{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line);padding:0}
.faq-q{padding:24px 0;display:flex;justify-content:space-between;align-items:center;cursor:pointer;font-family:var(--serif);font-size:17px;color:var(--ink);letter-spacing:1.5px;transition:color .25s}
.faq-q:hover{color:var(--gold)}
.faq-q .plus{font-family:var(--mono);font-size:18px;color:var(--gold);transition:transform .3s;flex-shrink:0;margin-left:24px}
.faq-item.open .faq-q .plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease,padding .4s ease;font-size:14px;color:var(--ink-2);line-height:2;letter-spacing:1px}
.faq-item.open .faq-a{max-height:500px;padding-bottom:28px}

/* feature lists */
.feat-list{list-style:none;padding:0;margin:0 0 32px}
.feat-list li{position:relative;padding:14px 0 14px 28px;border-bottom:1px solid var(--line);font-size:14px;color:var(--ink-2);letter-spacing:1px;line-height:1.7}
.feat-list li::before{content:'';position:absolute;left:0;top:23px;width:14px;height:1px;background:var(--gold)}
.feat-list li strong{color:var(--ink);font-weight:500;margin-right:8px}

/* curriculum */
.curri{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-top:48px}
.curri-step{padding:32px 24px;background:var(--bg-2);position:relative}
.curri-step .num{font-family:var(--mono);font-size:11px;color:var(--gold);letter-spacing:2px;margin-bottom:18px}
.curri-step h5{font-family:var(--serif);font-size:18px;color:var(--ink);letter-spacing:2px;font-weight:700;margin-bottom:10px}
.curri-step p{font-size:13px;color:var(--ink-3);line-height:1.7}

/* page two-col */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}
.two-col-narrow{display:grid;grid-template-columns:1.2fr 1fr;gap:80px;align-items:start}

/* simple section divider title */
.sub-title{font-family:var(--serif);font-size:24px;color:var(--ink);letter-spacing:3px;font-weight:700;margin-bottom:24px;display:flex;align-items:center;gap:14px}
.sub-title::before{content:'';width:32px;height:1px;background:var(--gold)}

/* responsive */
@media (max-width:1100px){
  .nav{display:none}
  section,.topbar,footer,.stats{padding-left:24px;padding-right:24px}
  .topbar{padding:14px 24px}
  .hero,.hero{padding:0 24px 60px}
  .hero-plate{display:none}
  .hero-meta{flex-wrap:wrap;gap:24px}
  .stats-grid,.about-grid,.biz-grid,.prod-detail,.prod-promo,.train-grid,.contact-grid,.footer-grid,.card-grid-3{grid-template-columns:1fr;gap:32px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .stat{border-right:none;border-bottom:1px solid var(--line);padding:24px}
  .freq-row,.partner-row,.scen-grid,.card-grid-4{grid-template-columns:repeat(2,1fr)}
  .case{grid-template-columns:60px 1fr;gap:16px}
  .case>*:not(:nth-child(-n+2)){display:none}
  h2{font-size:32px;letter-spacing:2px}
  .form-row{grid-template-columns:1fr}
}