/* ============================================
   BOKE DRIVER — Design System
   Primary: #0055A6 (BOKE Blue)
   Accent:  #00B4D8 (Cyan — smart/connected)
   ============================================ */
:root{--blue:#0055A6;--blue-dark:#003D7A;--blue-light:#E8F0FA;--cyan:#00B4D8;--cyan-dark:#0095B3;--white:#FFFFFF;--off-white:#F5F7FA;--border:#E8ECF1;--dark:#1A1F36;--text-primary:#1A1F36;--text-secondary:#4A5568;--text-tertiary:#6B7280;--font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--text-primary);background:var(--white);line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{text-decoration:none;color:inherit}
ul{list-style:none}

/* Layout */
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-label{font-size:12px;font-weight:600;letter-spacing:2px;text-transform:uppercase;color:var(--cyan);margin-bottom:12px}
.section-title{font-size:36px;font-weight:700;line-height:1.2;color:var(--text-primary);margin-bottom:16px}
.section-subtitle{font-size:18px;color:var(--text-secondary);line-height:1.6;max-width:640px}
.section-header{margin-bottom:56px}
.section-header.center{text-align:center}
.section-header.center .section-subtitle{margin:0 auto}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:8px;font-family:var(--font);font-size:14px;font-weight:600;padding:12px 24px;border-radius:6px;border:none;cursor:pointer;transition:all .2s;white-space:nowrap}
.btn-primary{background:var(--blue);color:var(--white)}
.btn-primary:hover{background:var(--blue-dark)}
.btn-secondary{background:transparent;color:var(--blue);border:1.5px solid var(--blue)}
.btn-secondary:hover{background:var(--blue-light)}
.btn-white{background:var(--white);color:var(--blue)}
.btn-white:hover{background:var(--off-white)}
.btn-ghost{background:transparent;color:var(--white);border:1.5px solid rgba(255,255,255,.4)}
.btn-ghost:hover{border-color:var(--white);background:rgba(255,255,255,.1)}
.btn-link{background:none;border:none;color:var(--blue);padding:0;font-weight:600;font-size:13px;cursor:pointer;font-family:var(--font)}
.btn-link:hover{color:var(--blue-dark)}
.btn i[data-lucide]{width:16px;height:16px}
.btn-group{display:flex;gap:12px;flex-wrap:wrap}

/* Navigation */
.nav{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,.97);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border);transition:box-shadow .3s}
.nav.scrolled{box-shadow:0 1px 8px rgba(0,0,0,.06)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.nav-logo{display:flex;align-items:center;gap:10px}
.nav-logo img{height:32px;width:auto}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-links a{font-size:14px;font-weight:500;color:var(--text-secondary);transition:color .2s}
.nav-links a:hover{color:var(--blue)}
.nav-actions{display:flex;align-items:center;gap:12px}
.lang-switch{font-size:13px;font-weight:500;color:var(--text-tertiary);padding:6px 12px;border:1px solid var(--border);border-radius:4px;cursor:pointer;transition:all .2s;background:none;font-family:var(--font)}
.lang-switch:hover{border-color:var(--blue);color:var(--blue)}
.nav-mobile-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px;color:var(--text-primary)}
.nav-mobile-toggle i[data-lucide]{width:24px;height:24px}
.nav-mobile{display:none;position:fixed;top:72px;left:0;right:0;bottom:0;background:var(--white);z-index:999;padding:24px;flex-direction:column;gap:4px;overflow-y:auto}
.nav-mobile.open{display:flex}
.nav-mobile a{font-size:16px;font-weight:500;color:var(--text-primary);padding:14px 0;border-bottom:1px solid var(--border)}
.nav-mobile a:hover{color:var(--blue)}

/* Hero */
.hero{position:relative;min-height:92vh;display:flex;align-items:center;background:var(--dark);overflow:hidden;padding-top:72px}
.hero-bg{position:absolute;inset:0;background:radial-gradient(ellipse 80% 50% at 70% 40%,rgba(0,85,166,.15),transparent),radial-gradient(ellipse 60% 40% at 20% 80%,rgba(0,180,216,.08),transparent)}
.hero-pattern{position:absolute;inset:0;opacity:.04;background-image:linear-gradient(rgba(255,255,255,.3) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.3) 1px,transparent 1px);background-size:48px 48px}
.hero-content{position:relative;z-index:2;display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.hero-text{color:var(--white)}
.hero-badge{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;letter-spacing:1.5px;text-transform:uppercase;color:var(--cyan);margin-bottom:24px;padding:6px 14px;border:1px solid rgba(0,180,216,.3);border-radius:100px}
.hero-badge-dot{width:6px;height:6px;border-radius:50%;background:var(--cyan);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.hero h1{font-size:48px;font-weight:800;line-height:1.1;letter-spacing:-.03em;margin-bottom:24px}
.hero h1 .hl{color:var(--cyan)}
.hero-desc{font-size:18px;line-height:1.7;color:rgba(255,255,255,.65);margin-bottom:36px;max-width:520px}
.hero-visual{position:relative;display:flex;align-items:center;justify-content:center}
.hero-product-img{width:100%;max-width:460px;filter:drop-shadow(0 20px 60px rgba(0,0,0,.4))}
.hero-stats{display:flex;gap:40px;margin-top:48px;padding-top:32px;border-top:1px solid rgba(255,255,255,.1)}
.hero-stat-number{font-size:32px;font-weight:800;color:var(--white);letter-spacing:-.02em}
.hero-stat-label{font-size:13px;color:rgba(255,255,255,.45);margin-top:4px}

/* Value Strip */
.value-strip{background:var(--white);border-bottom:1px solid var(--border);padding:48px 0}
.value-strip-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px}
.value-item{display:flex;align-items:flex-start;gap:16px}
.value-icon{flex-shrink:0;width:44px;height:44px;display:flex;align-items:center;justify-content:center;background:var(--blue-light);border-radius:10px;color:var(--blue)}
.value-icon i[data-lucide]{width:22px;height:22px}
.value-item h4{font-size:14px;font-weight:600;margin-bottom:4px}
.value-item p{font-size:13px;color:var(--text-tertiary);line-height:1.5}

/* Products */
.products-bg{background:var(--off-white)}
.product-tabs{display:flex;gap:4px;margin-bottom:40px;background:var(--white);border:1px solid var(--border);border-radius:8px;padding:4px;overflow-x:auto;-webkit-overflow-scrolling:touch}
.product-tab{font-size:13px;font-weight:500;padding:10px 20px;border-radius:6px;cursor:pointer;white-space:nowrap;color:var(--text-secondary);transition:all .2s;border:none;background:none;font-family:var(--font)}
.product-tab.active{background:var(--blue);color:var(--white)}
.product-tab:hover:not(.active){background:var(--off-white)}
.product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.product-card{background:var(--white);border:1px solid var(--border);border-radius:12px;overflow:hidden;transition:all .25s}
.product-card:hover{border-color:var(--blue);box-shadow:0 8px 32px rgba(0,85,166,.08);transform:translateY(-2px)}
.product-card-img{padding:20px;background:var(--off-white);display:flex;align-items:center;justify-content:center;height:180px}
.product-card-img img{max-height:140px;object-fit:contain}
.product-card-body{padding:20px}
.product-card-series{font-size:16px;font-weight:700;margin-bottom:6px}
.product-card-protocol{display:inline-block;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:var(--blue);background:var(--blue-light);padding:3px 8px;border-radius:4px;margin-bottom:10px}
.product-card-desc{font-size:13px;color:var(--text-tertiary);line-height:1.5;margin-bottom:12px}
.product-features{display:flex;flex-wrap:wrap;gap:6px}
.feature-tag{font-size:11px;color:var(--text-secondary);background:var(--off-white);padding:3px 8px;border-radius:4px}
.product-card-link{display:flex;align-items:center;gap:6px;font-size:13px;font-weight:600;color:var(--blue);margin-top:14px;padding-top:12px;border-top:1px solid var(--border)}
.product-card-link i[data-lucide]{width:14px;height:14px;transition:transform .2s}
.product-card:hover .product-card-link i[data-lucide]{transform:translateX(3px)}

/* Solutions */
.solutions-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.solution-card{position:relative;border-radius:12px;overflow:hidden;aspect-ratio:4/3;cursor:pointer;background:var(--dark)}
.solution-card-overlay{position:absolute;inset:0;background:linear-gradient(to top,rgba(26,31,54,.88) 0%,rgba(26,31,54,.3) 60%)}
.solution-card-content{position:absolute;bottom:0;left:0;right:0;padding:24px;color:var(--white)}
.solution-icon{width:36px;height:36px;display:flex;align-items:center;justify-content:center;background:rgba(255,255,255,.12);border-radius:8px;margin-bottom:12px}
.solution-icon i[data-lucide]{width:18px;height:18px}
.solution-card h3{font-size:17px;font-weight:700;margin-bottom:6px}
.solution-card p{font-size:13px;color:rgba(255,255,255,.6);line-height:1.5}
.solution-card.featured{grid-column:span 2;grid-row:span 2;aspect-ratio:auto}
.solution-card.featured .solution-card-content{padding:36px}
.solution-card.featured h3{font-size:22px}
.solution-card.featured p{font-size:14px;max-width:360px}

/* Technologies */
.tech-bg{background:var(--off-white)}
.tech-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.tech-card{padding:32px;border:1px solid var(--border);border-radius:12px;transition:all .25s;background:var(--white)}
.tech-card:hover{border-color:var(--blue);box-shadow:0 4px 20px rgba(0,85,166,.06)}
.tech-icon{width:48px;height:48px;display:flex;align-items:center;justify-content:center;background:var(--blue-light);border-radius:12px;color:var(--blue);margin-bottom:20px}
.tech-icon i[data-lucide]{width:24px;height:24px}
.tech-card h3{font-size:16px;font-weight:700;margin-bottom:8px}
.tech-card p{font-size:14px;color:var(--text-tertiary);line-height:1.6}

/* Software & Tools */
.tools-bg{background:var(--dark);color:var(--white)}
.tools-bg .section-title{color:var(--white)}
.tools-bg .section-subtitle{color:rgba(255,255,255,.55)}
.tools-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.tool-card{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:12px;padding:32px;transition:all .25s}
.tool-card:hover{background:rgba(255,255,255,.08);border-color:rgba(0,180,216,.35)}
.tool-icon{width:48px;height:48px;display:flex;align-items:center;justify-content:center;background:rgba(0,180,216,.12);border-radius:12px;color:var(--cyan);margin-bottom:20px}
.tool-icon i[data-lucide]{width:24px;height:24px}
.tool-card h3{font-size:16px;font-weight:700;margin-bottom:8px}
.tool-card p{font-size:14px;color:rgba(255,255,255,.5);line-height:1.6;margin-bottom:20px}
.tool-card .btn-link{color:var(--cyan)}
.tool-card .btn-link:hover{color:var(--white)}

/* Proof Points */
.proof-strip{background:var(--blue);padding:64px 0}
.proof-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:32px;text-align:center;color:var(--white)}
.proof-number{font-size:40px;font-weight:800;letter-spacing:-.03em;margin-bottom:4px}
.proof-label{font-size:13px;color:rgba(255,255,255,.7);line-height:1.4}

/* About */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.about-text .section-subtitle{margin-bottom:24px}
.about-list{display:flex;flex-direction:column;gap:12px;margin-bottom:32px}
.about-list-item{display:flex;align-items:flex-start;gap:12px;font-size:14px;color:var(--text-secondary);line-height:1.6}
.about-list-item i[data-lucide]{width:18px;height:18px;color:var(--blue);flex-shrink:0;margin-top:2px}
.about-visual{background:var(--off-white);border-radius:16px;padding:48px;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:400px;text-align:center}
.about-year{font-size:80px;font-weight:800;color:var(--blue);letter-spacing:-.04em;line-height:1;margin-bottom:8px}
.about-year-label{font-size:14px;color:var(--text-tertiary);margin-bottom:32px}
.about-timeline{display:flex;gap:24px;width:100%}
.about-tl-item{text-align:center;flex:1}
.about-tl-item .num{font-size:24px;font-weight:700;color:var(--text-primary)}
.about-tl-item .lbl{font-size:12px;color:var(--text-tertiary);margin-top:4px}

/* CTA */
.cta-section{background:var(--blue);padding:80px 0;text-align:center;color:var(--white)}
.cta-section h2{font-size:36px;font-weight:700;margin-bottom:16px}
.cta-section p{font-size:18px;color:rgba(255,255,255,.7);margin-bottom:36px;max-width:560px;margin-left:auto;margin-right:auto}
.cta-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* Footer */
.footer{background:var(--dark);color:rgba(255,255,255,.6);padding:64px 0 32px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:48px}
.footer-brand{max-width:280px}
.footer-brand-logo{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand-logo img{height:28px}
.footer-brand-name{font-size:16px;font-weight:700;color:var(--white)}
.footer-brand p{font-size:13px;line-height:1.7}
.footer-col h4{font-size:13px;font-weight:600;text-transform:uppercase;letter-spacing:1px;color:var(--white);margin-bottom:16px}
.footer-col a{display:block;font-size:13px;color:rgba(255,255,255,.5);padding:4px 0;transition:color .2s}
.footer-col a:hover{color:var(--white)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:24px;display:flex;justify-content:space-between;align-items:center;font-size:12px}
.footer-bottom a{color:rgba(255,255,255,.4);transition:color .2s}
.footer-bottom a:hover{color:var(--white)}

/* Bilingual */
[lang="en"] .zh{display:none}
[lang="zh-CN"] .en{display:none}
.bilingual .en,.bilingual .zh{display:block}
[lang="en"] .bilingual .zh{display:none}
[lang="zh-CN"] .bilingual .en{display:none}
.sub-zh{display:block;font-size:14px;color:var(--text-tertiary);font-weight:400;margin-top:4px}
.hero .sub-zh{color:rgba(255,255,255,.4);font-size:15px;margin-top:6px}
.section-title .sub-zh{font-size:16px;margin-top:8px}
.proof-strip .sub-zh{color:rgba(255,255,255,.5);font-size:12px}

/* Responsive */
@media(max-width:1024px){
  .nav-links{display:none}
  .nav-mobile-toggle{display:block}
  .hero-content{grid-template-columns:1fr;text-align:center}
  .hero h1{font-size:36px}
  .hero-desc{margin:0 auto 32px}
  .hero-visual{margin-top:40px}
  .hero-stats{justify-content:center;flex-wrap:wrap;gap:24px}
  .value-strip-grid{grid-template-columns:repeat(2,1fr)}
  .product-grid{grid-template-columns:repeat(2,1fr)}
  .solutions-grid{grid-template-columns:1fr}
  .solution-card.featured{grid-column:span 1;grid-row:span 1;aspect-ratio:4/3}
  .tech-grid{grid-template-columns:1fr}
  .tools-grid{grid-template-columns:1fr}
  .proof-grid{grid-template-columns:repeat(3,1fr)}
  .about-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  .section{padding:64px 0}
  .section-title{font-size:28px}
  .hero{min-height:auto;padding:100px 0 64px}
  .hero h1{font-size:30px}
  .hero-desc{font-size:16px}
  .value-strip-grid{grid-template-columns:1fr}
  .product-grid{grid-template-columns:1fr}
  .proof-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:12px;text-align:center}
  .cta-section h2{font-size:28px}
}