/* ============================================
   NightHawk Template — 夜鹰空中侦察风格 (Aerial Surveillance)
   Colors: Electric Cyan #22D3EE + Deep Dark Navy #080A12
   Font: Arial Narrow headings + system sans body
   CSS Prefix: nhk
   ============================================ */
:root {
    --nhk-cyan: #22D3EE; --nhk-cyan-light: #67E8F9; --nhk-cyan-dim: #0891B2;
    --nhk-cyan-glow: rgba(34,211,238,0.22);
    --nhk-bg: #080A12; --nhk-bg2: #0D1119; --nhk-bg3: #121826;
    --nhk-card: rgba(34,211,238,0.04); --nhk-card-h: rgba(34,211,238,0.09);
    --nhk-text: #E2E8F0; --nhk-text-sec: #94A3B8; --nhk-text-muted: #64748B;
    --nhk-border: rgba(34,211,238,0.14); --nhk-border-h: rgba(34,211,238,0.32);
    --nhk-radius: 12px; --nhk-radius-lg: 16px;
    --nhk-font-heading: "Arial Narrow","Helvetica Neue","PingFang SC","Microsoft YaHei",sans-serif;
    --nhk-font-body: -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
    --nhk-transition: all 0.35s cubic-bezier(0.4,0,0.2,1);
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}}
body{font-family:var(--nhk-font-body);font-size:16px;line-height:1.7;color:var(--nhk-text);background:var(--nhk-bg);overflow-x:hidden;-webkit-font-smoothing:antialiased;background-image:linear-gradient(rgba(34,211,238,0.025) 1px,transparent 1px),linear-gradient(90deg,rgba(34,211,238,0.025) 1px,transparent 1px);background-size:40px 40px}
a{text-decoration:none;color:inherit;transition:var(--nhk-transition)}
img{max-width:100%;height:auto;display:block}
ul{list-style:none}
h1,h2,h3,h4{font-family:var(--nhk-font-heading);font-weight:700;line-height:1.2;color:var(--nhk-text);letter-spacing:1px;text-transform:uppercase}
.nhk-container{max-width:1200px;margin:0 auto;padding:0 24px}
.nhk-nav{position:fixed;top:14px;left:14px;right:14px;z-index:1000;display:flex;align-items:center;justify-content:space-between;padding:14px 24px;background:rgba(8,10,18,0.85);backdrop-filter:blur(18px);border:1px solid var(--nhk-border);border-radius:var(--nhk-radius);transition:var(--nhk-transition)}
.nhk-nav.scrolled{background:rgba(8,10,18,0.97);box-shadow:0 0 30px rgba(34,211,238,0.08),0 4px 24px rgba(0,0,0,0.5)}
.nhk-logo{display:flex;align-items:center;gap:10px;font-family:var(--nhk-font-heading);font-weight:700;font-size:1.15rem;color:var(--nhk-text);letter-spacing:1.5px}
.nhk-logo-icon{width:36px;height:36px;background:linear-gradient(135deg,var(--nhk-cyan),var(--nhk-cyan-dim));border-radius:50%;display:flex;align-items:center;justify-content:center;color:#080A12;flex-shrink:0;box-shadow:0 0 14px var(--nhk-cyan-glow)}
.nhk-logo-icon svg{width:20px;height:20px}
.nhk-nav-links{display:flex;gap:28px}
.nhk-nav-links a{font-size:.88rem;font-weight:500;color:var(--nhk-text-sec);position:relative}
.nhk-nav-links a::after{content:'';position:absolute;bottom:-4px;left:0;width:0;height:2px;background:var(--nhk-cyan);border-radius:1px;transition:width .3s;box-shadow:0 0 6px var(--nhk-cyan-glow)}
.nhk-nav-links a:hover{color:var(--nhk-cyan-light)}
.nhk-nav-links a:hover::after{width:100%}
.nhk-nav-cta{display:inline-flex;align-items:center;gap:6px;padding:9px 20px;background:var(--nhk-cyan);color:#080A12;border-radius:10px;font-size:.84rem;font-weight:700;cursor:pointer;transition:var(--nhk-transition)}
.nhk-nav-cta:hover{background:var(--nhk-cyan-light);box-shadow:0 0 20px var(--nhk-cyan-glow);transform:translateY(-1px)}
.nhk-mobile-btn{display:none;background:none;border:none;cursor:pointer;color:var(--nhk-cyan);padding:4px}
.nhk-hero{position:relative;min-height:100vh;display:flex;align-items:center;padding:120px 0 80px;overflow:hidden}
.nhk-hero-bg-wrap{position:absolute;inset:0;z-index:0}
.nhk-hero-bg-img{width:100%;height:100%;object-fit:cover;filter:grayscale(.6) brightness(.45) sepia(.3) hue-rotate(150deg)}
.nhk-hero-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(8,10,18,.92) 0%,rgba(8,10,18,.82) 50%,rgba(8,10,18,.97) 100%)}
.nhk-hero-inner{position:relative;z-index:1;max-width:720px}
.nhk-hero-badge{display:inline-flex;align-items:center;gap:8px;padding:7px 16px;background:rgba(34,211,238,0.08);border:1px solid var(--nhk-border-h);border-radius:20px;font-size:.78rem;font-weight:600;color:var(--nhk-cyan-light);margin-bottom:22px;letter-spacing:1px}
.nhk-hero-badge .nhk-dot{width:6px;height:6px;background:var(--nhk-cyan);border-radius:50%;animation:nhk-pulse 2s infinite;box-shadow:0 0 8px var(--nhk-cyan)}
@keyframes nhk-pulse{0%,100%{opacity:1}50%{opacity:.3}}
.nhk-hero h1{font-size:2.8rem;margin-bottom:20px}
.nhk-hero h1 .nhk-accent{color:var(--nhk-cyan)}
.nhk-hero-desc{font-size:1rem;color:var(--nhk-text-sec);margin-bottom:32px;max-width:540px;line-height:1.85}
.nhk-hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:44px}
.nhk-btn-cta{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;background:var(--nhk-cyan);color:#080A12;border-radius:12px;font-weight:700;font-size:.9rem;cursor:pointer;border:none;transition:var(--nhk-transition);box-shadow:0 0 20px var(--nhk-cyan-glow)}
.nhk-btn-cta:hover{background:var(--nhk-cyan-light);transform:translateY(-2px);box-shadow:0 0 28px rgba(34,211,238,.4)}
.nhk-btn-ghost{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;background:transparent;color:var(--nhk-text-sec);border:1px solid var(--nhk-border-h);border-radius:12px;font-weight:500;font-size:.9rem;cursor:pointer}
.nhk-btn-ghost:hover{border-color:var(--nhk-cyan);color:var(--nhk-cyan-light);background:var(--nhk-card)}
.nhk-hero-nums{display:flex;align-items:center;gap:30px}
.nhk-hn-v{display:block;font-size:1.6rem;font-weight:700;color:var(--nhk-cyan-light);font-family:var(--nhk-font-heading)}
.nhk-hn-l{font-size:.72rem;color:var(--nhk-text-muted);letter-spacing:1px}
.nhk-hn-sep{width:1px;height:34px;background:var(--nhk-border)}
.nhk-trust{padding:20px 0;background:var(--nhk-bg2);border-bottom:1px solid var(--nhk-border);border-top:1px solid var(--nhk-border)}
.nhk-trust-inner{display:flex;justify-content:center;gap:36px;flex-wrap:wrap}
.nhk-trust-item{display:flex;align-items:center;gap:8px;font-size:.82rem;font-weight:500;color:var(--nhk-text-sec)}
.nhk-trust-item svg{color:var(--nhk-cyan);flex-shrink:0}
.nhk-section{padding:90px 0}
.nhk-section-alt{background:var(--nhk-bg2)}
.nhk-sec-header{text-align:center;margin-bottom:54px}
.nhk-sec-tag{display:inline-block;padding:5px 14px;background:rgba(34,211,238,0.08);color:var(--nhk-cyan-light);border:1px solid var(--nhk-border);border-radius:20px;font-size:.75rem;font-weight:600;letter-spacing:1px;text-transform:uppercase;margin-bottom:14px}
.nhk-sec-header h2{font-size:2rem;margin-bottom:12px}
.nhk-sec-header h2 .nhk-h-accent{color:var(--nhk-cyan)}
.nhk-sec-header p{font-size:.9rem;color:var(--nhk-text-sec);max-width:560px;margin:0 auto}
.nhk-feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.nhk-feat-card{padding:28px 24px;background:var(--nhk-bg2);border:1px solid var(--nhk-border);border-radius:var(--nhk-radius);transition:var(--nhk-transition);cursor:pointer;position:relative;overflow:hidden}
.nhk-feat-card::after{content:'';position:absolute;bottom:0;left:0;width:0;height:2px;background:var(--nhk-cyan);transition:width .3s;box-shadow:0 0 6px var(--nhk-cyan-glow)}
.nhk-feat-card:hover{border-color:var(--nhk-border-h);transform:translateY(-4px);background:var(--nhk-bg3)}
.nhk-feat-card:hover::after{width:100%}
.nhk-feat-icon{width:46px;height:46px;display:flex;align-items:center;justify-content:center;background:rgba(34,211,238,0.08);border:1px solid var(--nhk-border);border-radius:12px;margin-bottom:16px}
.nhk-feat-icon svg{width:22px;height:22px;stroke:var(--nhk-cyan-light)}
.nhk-feat-card h3{font-size:1rem;margin-bottom:8px}
.nhk-feat-card p{font-size:.84rem;color:var(--nhk-text-sec);line-height:1.75}
.nhk-svc-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.nhk-svc-card{display:flex;flex-direction:column;background:var(--nhk-bg2);border:1px solid var(--nhk-border);border-radius:var(--nhk-radius);overflow:hidden;transition:var(--nhk-transition);cursor:pointer}
.nhk-svc-card:hover{border-color:var(--nhk-border-h);transform:translateY(-3px);box-shadow:0 8px 30px rgba(34,211,238,.08)}
.nhk-svc-img{height:180px;overflow:hidden;position:relative}
.nhk-svc-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s;filter:grayscale(.4) brightness(.75) sepia(.2) hue-rotate(150deg)}
.nhk-svc-img::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,transparent 50%,rgba(8,10,18,.7) 100%);pointer-events:none}
.nhk-svc-card:hover .nhk-svc-img img{transform:scale(1.05);filter:grayscale(0) brightness(.9)}
.nhk-svc-body{padding:22px 24px}
.nhk-svc-body h3{font-size:1rem;margin-bottom:8px}
.nhk-svc-body p{font-size:.84rem;color:var(--nhk-text-sec);line-height:1.75;margin-bottom:12px}
.nhk-svc-link{color:var(--nhk-cyan-light);font-size:.82rem;font-weight:600;display:inline-flex;align-items:center;gap:4px;transition:var(--nhk-transition)}
.nhk-svc-link:hover{gap:8px;color:var(--nhk-cyan)}
.nhk-about-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.nhk-about-img{position:relative;border-radius:var(--nhk-radius);overflow:hidden;border:1px solid var(--nhk-border)}
.nhk-about-img img{width:100%;height:380px;object-fit:cover;filter:grayscale(.5) brightness(.75) sepia(.2) hue-rotate(150deg);transition:filter .4s}
.nhk-about-img:hover img{filter:grayscale(0) brightness(.9)}
.nhk-about-img::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(34,211,238,.06),transparent 60%);z-index:1;pointer-events:none}
.nhk-about-float{position:absolute;bottom:-14px;right:-14px;background:var(--nhk-cyan);color:#080A12;border-radius:12px;padding:14px 20px;text-align:center;z-index:2;box-shadow:0 0 20px var(--nhk-cyan-glow)}
.nhk-about-float .nhk-af-num{font-size:1.4rem;font-weight:800;display:block}
.nhk-about-float .nhk-af-label{font-size:.68rem}
.nhk-about-text .nhk-sec-tag{margin-bottom:12px}
.nhk-about-text h2{font-size:1.8rem;margin-bottom:16px}
.nhk-about-text p{color:var(--nhk-text-sec);margin-bottom:14px;font-size:.88rem;line-height:1.85}
.nhk-link{display:inline-flex;align-items:center;gap:6px;color:var(--nhk-cyan-light);font-weight:600;font-size:.88rem}
.nhk-link:hover{gap:10px;color:var(--nhk-cyan)}
.nhk-steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.nhk-step-card{text-align:center;padding:30px 16px;background:var(--nhk-bg2);border:1px solid var(--nhk-border);border-radius:var(--nhk-radius);transition:var(--nhk-transition)}
.nhk-step-card:hover{border-color:var(--nhk-border-h);transform:translateY(-4px)}
.nhk-step-num{font-size:2.2rem;font-weight:700;color:rgba(34,211,238,.2);margin-bottom:8px;font-family:var(--nhk-font-heading)}
.nhk-step-card h3{font-size:.95rem;margin-bottom:6px}
.nhk-step-card p{font-size:.8rem;color:var(--nhk-text-muted)}
.nhk-testi-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.nhk-testi-card{padding:26px 22px;background:var(--nhk-bg2);border:1px solid var(--nhk-border);border-radius:var(--nhk-radius);transition:var(--nhk-transition)}
.nhk-testi-card:hover{transform:translateY(-3px);border-color:var(--nhk-border-h)}
.nhk-testi-stars{color:var(--nhk-cyan);font-size:.84rem;margin-bottom:12px;letter-spacing:2px}
.nhk-testi-card>p{font-size:.84rem;color:var(--nhk-text-sec);line-height:1.8;margin-bottom:16px;font-style:italic}
.nhk-testi-author{display:flex;align-items:center;gap:10px}
.nhk-ta-avatar{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--nhk-cyan),var(--nhk-cyan-dim));color:#080A12;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.78rem}
.nhk-testi-author strong{font-size:.82rem;display:block;color:var(--nhk-text)}
.nhk-testi-author span{font-size:.72rem;color:var(--nhk-text-muted)}
.nhk-faq-layout{display:grid;grid-template-columns:1fr 2fr;gap:60px}
.nhk-faq-side{position:sticky;top:100px;align-self:start}
.nhk-faq-side .nhk-sec-tag{margin-bottom:12px}
.nhk-faq-side h2{font-size:1.7rem;margin-bottom:14px}
.nhk-faq-side p{font-size:.84rem;color:var(--nhk-text-sec);line-height:1.8}
.nhk-faq-main{display:flex;flex-direction:column;gap:10px}
.nhk-faq-item{background:var(--nhk-bg2);border:1px solid var(--nhk-border);border-radius:var(--nhk-radius);overflow:hidden;transition:border-color .2s}
.nhk-faq-item:hover{border-color:var(--nhk-border-h)}
.nhk-faq-q{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;cursor:pointer;font-weight:500;font-size:.88rem;color:var(--nhk-text)}
.nhk-faq-q svg{flex-shrink:0;stroke:var(--nhk-cyan);transition:transform .3s}
.nhk-faq-item.active .nhk-faq-q svg{transform:rotate(180deg)}
.nhk-faq-a{padding:0 20px;max-height:0;overflow:hidden;transition:max-height .3s,padding .3s;font-size:.83rem;color:var(--nhk-text-sec);line-height:1.8}
.nhk-faq-item.active .nhk-faq-a{padding:0 20px 14px;max-height:240px}
.nhk-recommend{padding:70px 0}
.nhk-recommend-grid{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.nhk-recommend-grid a{display:inline-block;padding:8px 16px;background:var(--nhk-bg2);border:1px solid var(--nhk-border);border-radius:10px;font-size:.82rem;color:var(--nhk-text-sec);transition:var(--nhk-transition);cursor:pointer}
.nhk-recommend-grid a:hover{color:var(--nhk-cyan-light);border-color:var(--nhk-cyan);transform:translateY(-2px);background:var(--nhk-card-h)}
.nhk-cta-sec{padding:80px 0;background:var(--nhk-bg2)}
.nhk-cta-box{text-align:center;max-width:620px;margin:0 auto;padding:60px 40px;border:1px solid var(--nhk-border);border-radius:var(--nhk-radius-lg);position:relative;overflow:hidden;background:linear-gradient(135deg,rgba(34,211,238,.05),rgba(34,211,238,.01))}
.nhk-cta-box::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,transparent,var(--nhk-cyan),transparent);box-shadow:0 0 8px var(--nhk-cyan-glow)}
.nhk-cta-box h2{font-size:1.8rem;margin-bottom:12px}
.nhk-cta-box p{font-size:.9rem;color:var(--nhk-text-sec);margin-bottom:28px}
.nhk-footer{padding:50px 0 0;border-top:1px solid var(--nhk-border);background:var(--nhk-bg)}
.nhk-footer-top{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;padding-bottom:34px;border-bottom:1px solid var(--nhk-border)}
.nhk-footer-desc{font-size:.8rem;color:var(--nhk-text-muted);margin-top:14px;line-height:1.8;max-width:400px}
.nhk-footer-nav h4{color:var(--nhk-cyan-light);font-size:.86rem;margin-bottom:14px}
.nhk-footer-nav li{margin-bottom:8px}
.nhk-footer-nav a{font-size:.8rem;color:var(--nhk-text-muted)}
.nhk-footer-nav a:hover{color:var(--nhk-cyan-light)}
.nhk-footer-bottom{padding:20px 0;text-align:center;font-size:.74rem;color:var(--nhk-text-muted)}
.nhk-page-hero{padding:150px 0 60px;text-align:center}
.nhk-page-hero h1{font-size:2.4rem;margin-bottom:12px}
.nhk-page-hero p{font-size:.92rem;color:var(--nhk-text-sec)}
@media(max-width:1024px){.nhk-hero h1{font-size:2.2rem}.nhk-feat-grid{grid-template-columns:repeat(2,1fr)}.nhk-svc-grid{grid-template-columns:1fr}.nhk-about-grid{grid-template-columns:1fr}.nhk-faq-layout{grid-template-columns:1fr}.nhk-faq-side{position:static;text-align:center}.nhk-footer-top{grid-template-columns:1fr 1fr}.nhk-steps-grid{grid-template-columns:repeat(2,1fr)}.nhk-testi-grid{grid-template-columns:1fr}}
@media(max-width:768px){.nhk-nav{top:8px;left:8px;right:8px;padding:10px 16px;flex-wrap:wrap}.nhk-nav-links{display:none;position:absolute;top:calc(100% + 8px);left:0;right:0;flex-direction:column;background:rgba(8,10,18,.98);border:1px solid var(--nhk-border);border-radius:var(--nhk-radius);padding:12px 16px;gap:0;backdrop-filter:blur(18px)}.nhk-nav-links.active{display:flex}.nhk-nav-links li{border-bottom:1px solid var(--nhk-border)}.nhk-nav-links li:last-child{border-bottom:none}.nhk-nav-links a{display:block;padding:12px 0}.nhk-nav-cta{display:none}.nhk-mobile-btn{display:block}.nhk-hero{padding:110px 0 60px;min-height:auto}.nhk-hero h1{font-size:1.8rem}.nhk-hero-actions{flex-direction:column}.nhk-btn-cta,.nhk-btn-ghost{width:100%;justify-content:center}.nhk-hero-nums{flex-wrap:wrap;gap:16px}.nhk-hn-sep{display:none}.nhk-feat-grid{grid-template-columns:1fr}.nhk-sec-header h2{font-size:1.5rem}.nhk-section{padding:60px 0}.nhk-cta-box{padding:40px 20px}.nhk-footer-top{grid-template-columns:1fr;gap:28px}.nhk-page-hero h1{font-size:1.8rem}}
@media(max-width:480px){.nhk-steps-grid{grid-template-columns:1fr}.nhk-trust-inner{gap:14px}}