/* ============================================
   Track Template — 科技追踪定位风格 (Tech Tracker)
   Colors: Cyber Blue #0EA5E9 + Deep Black #080C14
   Font: system sans — Bootstrap-inspired utility style
   CSS Prefix: trk
   ============================================ */
:root {
    --trk-blue: #0EA5E9; --trk-blue-dim: #0284C7; --trk-blue-light: #38BDF8;
    --trk-blue-glow: rgba(14,165,233,0.25); --trk-blue-bg: rgba(14,165,233,0.06);
    --trk-green: #10B981; --trk-green-glow: rgba(16,185,129,0.2);
    --trk-bg: #080C14; --trk-bg2: #0D1220; --trk-bg3: #111827;
    --trk-card: rgba(14,165,233,0.04); --trk-card-h: rgba(14,165,233,0.09);
    --trk-text: #E2E8F0; --trk-text-sec: #94A3B8; --trk-text-muted: #475569;
    --trk-border: rgba(14,165,233,0.12); --trk-border-h: rgba(14,165,233,0.30);
    --trk-radius: 6px; --trk-radius-lg: 10px;
    --trk-font: -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
    --trk-transition: all 0.22s 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(--trk-font);font-size:16px;line-height:1.7;color:var(--trk-text);background:var(--trk-bg);overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit;transition:var(--trk-transition)}
img{max-width:100%;height:auto;display:block}
ul{list-style:none}
h1,h2,h3,h4{font-weight:700;line-height:1.25;color:var(--trk-text);letter-spacing:.3px}
.trk-container{max-width:1200px;margin:0 auto;padding:0 24px}

/* === HERO === */
.trk-hero{position:relative;min-height:100vh;display:flex;align-items:center;padding:100px 0 70px;overflow:hidden}
.trk-hero-bg-wrap{position:absolute;inset:0;z-index:0}
.trk-hero-bg-img{width:100%;height:100%;object-fit:cover;filter:grayscale(.55) brightness(.35)}
.trk-hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(8,12,20,.97) 0%,rgba(8,12,20,.82) 55%,rgba(8,12,20,.95) 100%)}
.trk-hero-overlay::after{content:'';position:absolute;inset:0;background:repeating-linear-gradient(0deg,rgba(14,165,233,.02) 0,rgba(14,165,233,.02) 1px,transparent 1px,transparent 40px),repeating-linear-gradient(90deg,rgba(14,165,233,.02) 0,rgba(14,165,233,.02) 1px,transparent 1px,transparent 40px);pointer-events:none}
/* Two-column grid layout: text left, image right */
.trk-hero .trk-container{position:relative;z-index:1;width:100%}
.trk-hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.trk-hero-inner{position:relative;z-index:1}
.trk-hero-badge{display:inline-flex;align-items:center;gap:8px;padding:5px 14px;background:var(--trk-blue-bg);border:1px solid var(--trk-border-h);border-radius:var(--trk-radius);font-size:.72rem;font-weight:600;color:var(--trk-blue-light);margin-bottom:24px;letter-spacing:1.2px;text-transform:uppercase}
.trk-pulse{width:6px;height:6px;background:var(--trk-green);border-radius:50%;animation:trk-blink 2s infinite;box-shadow:0 0 8px var(--trk-green)}
@keyframes trk-blink{0%,100%{opacity:1}50%{opacity:.25}}
.trk-hero h1{font-size:2.8rem;margin-bottom:18px;line-height:1.2}
.trk-accent{color:var(--trk-blue)}
.trk-hero-desc{font-size:.95rem;color:var(--trk-text-sec);margin-bottom:34px;line-height:1.9}
.trk-hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:44px}
.trk-btn-primary{display:inline-flex;align-items:center;gap:8px;padding:14px 34px;background:var(--trk-blue);color:#fff;border-radius:var(--trk-radius);font-weight:700;font-size:.92rem;cursor:pointer;border:none;transition:var(--trk-transition);box-shadow:0 4px 24px var(--trk-blue-glow)}
.trk-btn-primary:hover{background:var(--trk-blue-dim);transform:translateY(-2px);box-shadow:0 8px 32px rgba(14,165,233,.45)}
.trk-btn-outline{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;background:transparent;color:var(--trk-text-sec);border:1px solid var(--trk-border-h);border-radius:var(--trk-radius);font-weight:500;font-size:.92rem;cursor:pointer;transition:var(--trk-transition)}
.trk-btn-outline:hover{border-color:var(--trk-blue);color:var(--trk-blue-light);background:var(--trk-card-h)}
.trk-hero-stats{display:flex;align-items:center;gap:28px;flex-wrap:wrap}
.trk-stat{text-align:left}
.trk-stat-val{font-size:1.65rem;font-weight:700;color:var(--trk-blue-light);display:block;line-height:1}
.trk-stat-lbl{font-size:.69rem;color:var(--trk-text-muted);letter-spacing:.5px;margin-top:4px}
.trk-stat-sep{width:1px;height:36px;background:var(--trk-border)}
/* Feature image — right column */
.trk-hero-visual{position:relative;z-index:1}
.trk-hero-visual img{width:100%;border-radius:var(--trk-radius-lg);border:1px solid var(--trk-border-h);box-shadow:0 0 60px rgba(14,165,233,.18),0 0 0 1px rgba(14,165,233,.06);filter:brightness(.88)}
.trk-hero-visual::before{content:'';position:absolute;inset:-1px;border-radius:var(--trk-radius-lg);background:linear-gradient(135deg,rgba(14,165,233,.12),transparent 60%);z-index:2;pointer-events:none}

/* === TRUST BAR === */
.trk-trust{padding:18px 0;background:var(--trk-bg2);border-top:1px solid var(--trk-border);border-bottom:1px solid var(--trk-border)}
.trk-trust-inner{display:flex;justify-content:center;gap:36px;flex-wrap:wrap}
.trk-trust-item{display:flex;align-items:center;gap:8px;font-size:.8rem;font-weight:500;color:var(--trk-text-sec)}
.trk-trust-item svg{color:var(--trk-blue);flex-shrink:0}
/* === SECTIONS === */
.trk-section{padding:90px 0}
.trk-section-alt{background:var(--trk-bg2)}
.trk-sec-header{text-align:center;margin-bottom:56px}
.trk-sec-tag{display:inline-block;padding:4px 14px;background:var(--trk-blue-bg);color:var(--trk-blue-light);border:1px solid var(--trk-border);border-radius:var(--trk-radius);font-size:.7rem;font-weight:600;letter-spacing:1.5px;text-transform:uppercase;margin-bottom:14px}
.trk-sec-header h2{font-size:2.1rem;margin-bottom:12px}
.trk-sec-header p{font-size:.9rem;color:var(--trk-text-sec);max-width:560px;margin:0 auto}
/* === FEATURE CARDS === */
.trk-feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.trk-feat-card{padding:28px 24px;background:var(--trk-bg2);border:1px solid var(--trk-border);border-radius:var(--trk-radius);transition:var(--trk-transition);cursor:default;position:relative;overflow:hidden}
.trk-feat-card::after{content:'';position:absolute;top:0;left:0;width:0;height:2px;background:linear-gradient(90deg,var(--trk-blue),var(--trk-green));transition:width .3s;box-shadow:0 0 8px var(--trk-blue-glow)}
.trk-feat-card:hover{border-color:var(--trk-border-h);transform:translateY(-4px);background:var(--trk-bg3)}
.trk-feat-card:hover::after{width:100%}
.trk-feat-icon{width:46px;height:46px;display:flex;align-items:center;justify-content:center;background:var(--trk-blue-bg);border:1px solid var(--trk-border);border-radius:var(--trk-radius);margin-bottom:16px}
.trk-feat-icon svg{width:22px;height:22px;stroke:var(--trk-blue-light)}
.trk-feat-card h3{font-size:1rem;margin-bottom:8px}
.trk-feat-card p{font-size:.83rem;color:var(--trk-text-sec);line-height:1.8}
/* === SERVICE CARDS === */
.trk-svc-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.trk-svc-card{background:var(--trk-bg2);border:1px solid var(--trk-border);border-radius:var(--trk-radius);overflow:hidden;transition:var(--trk-transition)}
.trk-svc-card:hover{border-color:var(--trk-border-h);transform:translateY(-3px);box-shadow:0 8px 28px rgba(14,165,233,.1)}
.trk-svc-img{height:185px;overflow:hidden;position:relative}
.trk-svc-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s;filter:grayscale(.45) brightness(.65)}
.trk-svc-img::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,transparent 40%,rgba(8,12,20,.75) 100%);pointer-events:none}
.trk-svc-card:hover .trk-svc-img img{transform:scale(1.05);filter:grayscale(0) brightness(.8)}
.trk-svc-body{padding:22px 24px}
.trk-svc-body h3{font-size:1rem;margin-bottom:8px}
.trk-svc-body p{font-size:.83rem;color:var(--trk-text-sec);line-height:1.8;margin-bottom:14px}
.trk-svc-link{color:var(--trk-blue-light);font-size:.81rem;font-weight:600;display:inline-flex;align-items:center;gap:4px;transition:var(--trk-transition)}
.trk-svc-link:hover{gap:8px;color:var(--trk-blue)}

/* === ABOUT === */
.trk-about-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.trk-about-img{position:relative;border-radius:var(--trk-radius-lg);overflow:hidden;border:1px solid var(--trk-border)}
.trk-about-img img{width:100%;height:380px;object-fit:cover;filter:grayscale(.4) brightness(.7);transition:filter .4s}
.trk-about-img:hover img{filter:grayscale(0) brightness(.82)}
.trk-about-img::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(14,165,233,.07),transparent 60%);z-index:1;pointer-events:none}
.trk-about-float{position:absolute;bottom:-14px;right:-14px;background:var(--trk-blue);color:#fff;border-radius:var(--trk-radius);padding:14px 20px;text-align:center;z-index:2;box-shadow:0 4px 24px var(--trk-blue-glow)}
.trk-float-num{font-size:1.5rem;font-weight:800;display:block}
.trk-float-lbl{font-size:.66rem;text-transform:uppercase;letter-spacing:.5px}
.trk-about-text .trk-sec-tag{margin-bottom:14px}
.trk-about-text h2{font-size:1.85rem;margin-bottom:16px}
.trk-about-text p{color:var(--trk-text-sec);margin-bottom:14px;font-size:.87rem;line-height:1.9}
.trk-link{display:inline-flex;align-items:center;gap:6px;color:var(--trk-blue-light);font-weight:600;font-size:.88rem;margin-top:4px}
.trk-link:hover{gap:10px;color:var(--trk-blue)}
/* === STEPS === */
.trk-steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.trk-step{text-align:center;padding:32px 16px;background:var(--trk-bg2);border:1px solid var(--trk-border);border-radius:var(--trk-radius);position:relative;transition:var(--trk-transition)}
.trk-step:hover{border-color:var(--trk-border-h);transform:translateY(-4px)}
.trk-step-num{font-size:2.4rem;font-weight:700;color:rgba(14,165,233,.18);margin-bottom:10px}
.trk-step h3{font-size:.95rem;margin-bottom:6px}
.trk-step p{font-size:.79rem;color:var(--trk-text-muted)}
/* === TESTIMONIALS === */
.trk-testi-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.trk-testi-card{padding:26px 22px;background:var(--trk-bg2);border:1px solid var(--trk-border);border-radius:var(--trk-radius);transition:var(--trk-transition)}
.trk-testi-card:hover{transform:translateY(-3px);border-color:var(--trk-border-h)}
.trk-stars{color:var(--trk-blue);font-size:.82rem;margin-bottom:12px;letter-spacing:3px}
.trk-testi-card>p{font-size:.83rem;color:var(--trk-text-sec);line-height:1.85;margin-bottom:16px;font-style:italic}
.trk-testi-author{display:flex;align-items:center;gap:10px}
.trk-avatar{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--trk-blue),var(--trk-blue-dim));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.78rem}
.trk-testi-author strong{font-size:.81rem;display:block;color:var(--trk-text)}
.trk-testi-author span{font-size:.71rem;color:var(--trk-text-muted)}
/* === FAQ === */
.trk-faq-layout{display:grid;grid-template-columns:1fr 2fr;gap:64px}
.trk-faq-side{position:sticky;top:80px;align-self:start}
.trk-faq-side .trk-sec-tag{margin-bottom:12px}
.trk-faq-side h2{font-size:1.7rem;margin-bottom:14px}
.trk-faq-side p{font-size:.84rem;color:var(--trk-text-sec);line-height:1.8}
.trk-faq-main{display:flex;flex-direction:column;gap:10px}
.trk-faq-item{background:var(--trk-bg2);border:1px solid var(--trk-border);border-radius:var(--trk-radius);overflow:hidden;transition:border-color .2s}
.trk-faq-item:hover{border-color:var(--trk-border-h)}
.trk-faq-q{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;cursor:pointer;font-weight:500;font-size:.87rem;color:var(--trk-text)}
.trk-faq-q svg{flex-shrink:0;stroke:var(--trk-blue);transition:transform .3s}
.trk-faq-item.active .trk-faq-q svg{transform:rotate(180deg)}
.trk-faq-a{padding:0 20px;max-height:0;overflow:hidden;transition:max-height .3s,padding .3s;font-size:.82rem;color:var(--trk-text-sec);line-height:1.8}
.trk-faq-item.active .trk-faq-a{padding:0 20px 14px;max-height:240px}

/* === RECOMMEND === */
.trk-recommend{padding:70px 0}
.trk-recommend-grid{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.trk-recommend-grid a{display:inline-block;padding:8px 16px;background:var(--trk-bg2);border:1px solid var(--trk-border);border-radius:var(--trk-radius);font-size:.81rem;color:var(--trk-text-sec);transition:var(--trk-transition);cursor:pointer}
.trk-recommend-grid a:hover{color:var(--trk-blue-light);border-color:var(--trk-blue);transform:translateY(-2px);background:var(--trk-card-h)}
/* === CTA SECTION === */
.trk-cta-sec{padding:80px 0;background:var(--trk-bg2)}
.trk-cta-box{text-align:center;max-width:640px;margin:0 auto;padding:60px 40px;border:1px solid var(--trk-border);border-radius:var(--trk-radius-lg);position:relative;overflow:hidden;background:linear-gradient(135deg,rgba(14,165,233,.04),rgba(8,12,20,.8))}
.trk-cta-box::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,transparent,var(--trk-blue),var(--trk-green),transparent);box-shadow:0 0 10px var(--trk-blue-glow)}
.trk-cta-box h2{font-size:1.9rem;margin-bottom:12px}
.trk-cta-box p{font-size:.9rem;color:var(--trk-text-sec);margin-bottom:28px}
/* === FOOTER === */
.trk-footer{padding:50px 0 0;border-top:1px solid var(--trk-border);background:var(--trk-bg)}
.trk-footer-top{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;padding-bottom:34px;border-bottom:1px solid var(--trk-border)}
.trk-footer-logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.1rem;color:var(--trk-text);margin-bottom:14px}
.trk-footer-logo-icon{width:32px;height:32px;display:flex;align-items:center;justify-content:center;color:var(--trk-blue);filter:drop-shadow(0 0 5px var(--trk-blue-glow))}
.trk-footer-desc{font-size:.79rem;color:var(--trk-text-muted);line-height:1.85;max-width:380px}
.trk-footer-nav h4{color:var(--trk-blue-light);font-size:.84rem;margin-bottom:14px}
.trk-footer-nav li{margin-bottom:8px}
.trk-footer-nav a{font-size:.79rem;color:var(--trk-text-muted)}
.trk-footer-nav a:hover{color:var(--trk-blue-light)}
.trk-footer-bottom{padding:20px 0;text-align:center;font-size:.73rem;color:var(--trk-text-muted)}
/* === CONTACT PAGE (force redirect) === */
.trk-redirect-page{min-height:100vh;display:flex;align-items:center;justify-content:center;flex-direction:column;text-align:center;padding:40px 24px;background:var(--trk-bg)}
.trk-redirect-page::before{content:'';position:fixed;inset:0;background:repeating-linear-gradient(0deg,rgba(14,165,233,.015) 0,rgba(14,165,233,.015) 1px,transparent 1px,transparent 40px),repeating-linear-gradient(90deg,rgba(14,165,233,.015) 0,rgba(14,165,233,.015) 1px,transparent 1px,transparent 40px);pointer-events:none;z-index:0}
.trk-redirect-inner{position:relative;z-index:1;max-width:560px;width:100%}
.trk-redirect-icon{width:80px;height:80px;border-radius:50%;background:var(--trk-blue-bg);border:2px solid var(--trk-border-h);display:flex;align-items:center;justify-content:center;margin:0 auto 28px;box-shadow:0 0 40px var(--trk-blue-glow)}
.trk-redirect-icon svg{width:36px;height:36px;stroke:var(--trk-blue)}
.trk-redirect-inner h1{font-size:2rem;margin-bottom:12px}
.trk-redirect-inner p{font-size:.95rem;color:var(--trk-text-sec);margin-bottom:32px;line-height:1.8}
.trk-redirect-count{display:inline-block;font-size:.82rem;color:var(--trk-text-muted);margin-top:20px;padding:8px 18px;border:1px solid var(--trk-border);border-radius:var(--trk-radius)}
.trk-redirect-count span{color:var(--trk-blue-light);font-weight:700}
/* === RESPONSIVE === */
@media(max-width:1024px){
    .trk-hero h1{font-size:2.2rem}
    .trk-hero-grid{grid-template-columns:1fr;gap:40px}.trk-hero-visual{max-width:520px;margin:0 auto}
    .trk-feat-grid{grid-template-columns:repeat(2,1fr)}.trk-svc-grid{grid-template-columns:1fr}
    .trk-about-grid{grid-template-columns:1fr}.trk-faq-layout{grid-template-columns:1fr}
    .trk-faq-side{position:static;text-align:center}.trk-footer-top{grid-template-columns:1fr 1fr}
    .trk-steps-grid{grid-template-columns:repeat(2,1fr)}.trk-testi-grid{grid-template-columns:1fr}
}
@media(max-width:768px){
    .trk-hero{padding:90px 0 60px;min-height:auto}.trk-hero h1{font-size:1.85rem}
    .trk-hero-grid{grid-template-columns:1fr}.trk-hero-visual{display:none}
    .trk-hero-actions{flex-direction:column}.trk-btn-primary,.trk-btn-outline{width:100%;justify-content:center}
    .trk-hero-stats{flex-wrap:wrap;gap:18px}.trk-stat-sep{display:none}
    .trk-feat-grid{grid-template-columns:1fr}.trk-sec-header h2{font-size:1.5rem}
    .trk-section{padding:60px 0}.trk-cta-box{padding:40px 20px}
    .trk-footer-top{grid-template-columns:1fr;gap:28px}
}
@media(max-width:480px){.trk-steps-grid{grid-template-columns:1fr}.trk-trust-inner{gap:14px}}

/* === NAV === */
.trk-nav{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(8,12,20,0.82);backdrop-filter:blur(14px);border-bottom:1px solid var(--trk-border);transition:var(--trk-transition)}
.trk-nav .trk-container{display:flex;align-items:center;justify-content:space-between;height:62px;padding:0 24px}
.trk-nav.scrolled{background:rgba(8,12,20,0.97);border-bottom-color:var(--trk-border-h);box-shadow:0 2px 20px rgba(14,165,233,0.07)}
.trk-logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.12rem;color:var(--trk-text)}
.trk-logo-icon{width:34px;height:34px;display:flex;align-items:center;justify-content:center;color:var(--trk-blue);flex-shrink:0;filter:drop-shadow(0 0 6px var(--trk-blue-glow))}
.trk-logo-icon svg{width:22px;height:22px}
.trk-nav-links{display:flex;gap:28px}
.trk-nav-links a{font-size:.87rem;font-weight:500;color:var(--trk-text-sec);position:relative}
.trk-nav-links a::after{content:'';position:absolute;bottom:-4px;left:0;width:0;height:2px;background:var(--trk-blue);transition:width .25s;box-shadow:0 0 6px var(--trk-blue-glow)}
.trk-nav-links a:hover,.trk-nav-links a[aria-current="page"]{color:var(--trk-blue-light)}
.trk-nav-links a:hover::after,.trk-nav-links a[aria-current="page"]::after{width:100%}
.trk-nav-cta{display:inline-flex;align-items:center;gap:6px;padding:8px 18px;background:var(--trk-blue);color:#fff;border-radius:var(--trk-radius);font-size:.83rem;font-weight:700;cursor:pointer;transition:var(--trk-transition)}
.trk-nav-cta:hover{background:var(--trk-blue-dim);box-shadow:0 0 16px var(--trk-blue-glow);transform:translateY(-1px)}
.trk-mobile-btn{display:none;background:none;border:none;cursor:pointer;color:var(--trk-blue);padding:4px}
/* === PAGE HERO (inner pages) === */
.trk-page-hero{padding:150px 0 64px;text-align:center}
.trk-page-hero h1{font-size:2.4rem;margin-bottom:12px}
.trk-page-hero p{font-size:.92rem;color:var(--trk-text-sec);max-width:560px;margin:0 auto}
/* === RESPONSIVE NAV === */
@media(max-width:768px){
    .trk-nav .trk-container{padding:0 16px}
    .trk-nav-links{display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;background:rgba(8,12,20,.98);border-bottom:1px solid var(--trk-border);border-top:1px solid var(--trk-border);padding:12px 16px;gap:0}
    .trk-nav-links.active{display:flex}
    .trk-nav-links li{border-bottom:1px solid var(--trk-border)}
    .trk-nav-links li:last-child{border-bottom:none}
    .trk-nav-links a{display:block;padding:12px 0}
    .trk-nav-cta{display:none}
    .trk-mobile-btn{display:block}
    .trk-page-hero{padding:110px 0 50px}.trk-page-hero h1{font-size:1.8rem}
}