:root{
  --primary-blue:#0099FF;
  --secondary-blue:#007ACC;
  --light-blue:#33AAFF;
  --dark:#07111f;
  --text:#1f2937;
  --muted:#64748b;
  --line:#e8f4fd;
  --bg:#f8fbff;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,'Microsoft YaHei',sans-serif;color:var(--text);background:#fff;line-height:1.78}
a{text-decoration:none;color:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.navbar{position:fixed;top:0;width:100%;background:rgba(255,255,255,.95);backdrop-filter:blur(10px);z-index:1000;border-bottom:1px solid #e0e0e0}
.nav-container{max-width:1200px;margin:0 auto;padding:0 20px;height:70px;display:flex;align-items:center;justify-content:space-between}
.nav-logo,.footer-logo{display:flex;align-items:center;gap:12px}
.logo-icon{width:40px;height:40px;border-radius:8px;object-fit:cover}
.logo-text{font-size:24px;font-weight:700;color:var(--primary-blue);letter-spacing:-.5px}
.nav-menu{display:flex;list-style:none;gap:30px}
.nav-link{color:#333;font-weight:500;font-size:16px;position:relative}
.nav-link:hover{color:var(--primary-blue)}
.nav-link:after{content:'';position:absolute;bottom:-6px;left:0;width:0;height:2px;background:var(--primary-blue);transition:.3s}
.nav-link:hover:after{width:100%}
.nav-toggle{display:none;flex-direction:column;gap:4px;cursor:pointer}
.nav-toggle span{width:25px;height:3px;background:var(--primary-blue)}
.lang-switch{display:flex;align-items:center;gap:8px;padding:6px 10px;margin-left:16px;border:1px solid rgba(22,119,255,.18);border-radius:999px;background:rgba(255,255,255,.72);box-shadow:0 8px 24px rgba(22,119,255,.08)}
.lang-item{font-size:13px;font-weight:600;color:#6B7A90;padding:4px 8px;border-radius:999px}
.lang-item.active,.lang-item:hover{color:#1677FF;background:linear-gradient(135deg,#EAF4FF,#fff)}
.lang-line{width:1px;height:14px;background:rgba(22,119,255,.18)}
.hero{margin-top:70px;position:relative;overflow:hidden;background:
 radial-gradient(circle at 18% 18%,rgba(51,170,255,.32),transparent 28%),
 radial-gradient(circle at 84% 24%,rgba(0,122,204,.28),transparent 32%),
 linear-gradient(135deg,#07111f 0%,#09233f 45%,#0066cc 100%);color:#fff;padding:112px 0 92px}
.hero:before{content:'';position:absolute;inset:0;background:linear-gradient(45deg,rgba(0,153,255,.1),rgba(0,0,0,.12))}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.06fr .94fr;gap:48px;align-items:center}
.eyebrow{display:inline-flex;gap:8px;align-items:center;padding:7px 14px;border:1px solid rgba(255,255,255,.22);border-radius:999px;background:rgba(255,255,255,.08);font-size:14px;margin-bottom:24px}
.hero h1{font-size:54px;line-height:1.16;margin-bottom:22px;letter-spacing:-1px}
.hero p{font-size:19px;color:rgba(255,255,255,.86)}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:32px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 22px;border-radius:999px;font-weight:700;border:1px solid rgba(255,255,255,.3)}
.btn.primary{background:#fff;color:#0066cc}
.btn.ghost{color:#fff;background:rgba(255,255,255,.08)}
.hero-panel{background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.18);border-radius:28px;padding:28px;backdrop-filter:blur(12px);box-shadow:0 30px 80px rgba(0,0,0,.22)}
.panel-title{font-size:20px;font-weight:800;margin-bottom:18px}
.panel-flow{display:grid;gap:12px}
.panel-step{display:flex;align-items:center;gap:14px;padding:14px 16px;border-radius:16px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.12)}
.panel-step b{width:30px;height:30px;border-radius:10px;background:#fff;color:#0066cc;display:flex;align-items:center;justify-content:center}
.panel-step span{color:#eaf4ff}

.section{padding:86px 0}
.section.light{background:linear-gradient(135deg,#f8fbff 0%,#fff 100%)}
.section.dark{background:#07111f;color:#fff}
.section-header{text-align:center;margin-bottom:52px}
.section-title{font-size:40px;line-height:1.25;color:#111827;margin-bottom:14px}
.section.dark .section-title{color:#fff}
.section-subtitle{font-size:18px;color:var(--muted);max-width:850px;margin:0 auto}
.section.dark .section-subtitle{color:rgba(255,255,255,.72)}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid.two{grid-template-columns:repeat(2,1fr)}
.grid.four{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:30px;box-shadow:0 12px 28px rgba(0,102,204,.06);transition:.3s}
.card:hover{transform:translateY(-6px);box-shadow:0 22px 44px rgba(0,102,204,.12);border-color:var(--primary-blue)}
.card h3{font-size:22px;color:#111827;margin-bottom:12px}
.card p,.card li{color:#5f6b7a}
.card ul{padding-left:20px;margin-top:10px}
.badge{display:inline-block;color:#007acc;background:#e8f4fd;border-radius:999px;padding:5px 12px;font-size:13px;font-weight:700;margin-bottom:14px}
.arch{background:#fff;border:1px solid var(--line);border-radius:28px;padding:32px;box-shadow:0 20px 54px rgba(0,102,204,.08)}
.arch-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.arch-box{border:1px solid #dbeafe;border-radius:18px;padding:18px;background:linear-gradient(135deg,#f8fbff,#fff)}
.arch-box strong{display:block;color:#0f4073;font-size:18px;margin-bottom:8px}
.arch-box p{color:#64748b;font-size:14px}
.arrow{height:28px;position:relative}
.arrow:after{content:'↓';position:absolute;left:50%;top:-4px;transform:translateX(-50%);color:#0099FF;font-size:24px;font-weight:800}
.flow{display:grid;gap:18px}
.flow-item{display:grid;grid-template-columns:72px 1fr;gap:20px;align-items:start;background:#fff;border:1px solid var(--line);border-radius:20px;padding:24px}
.num{width:52px;height:52px;border-radius:18px;background:linear-gradient(135deg,var(--primary-blue),var(--light-blue));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:20px}
.table-wrap{overflow:auto;background:#fff;border:1px solid var(--line);border-radius:22px}
table{width:100%;border-collapse:collapse;min-width:860px}
th,td{padding:18px 20px;text-align:left;border-bottom:1px solid #edf6ff;vertical-align:top}
th{background:#f3f9ff;color:#0f4073}
td{color:#5f6b7a}
.article{max-width:980px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:24px;padding:42px;box-shadow:0 14px 32px rgba(0,102,204,.06)}
.article h2{font-size:30px;margin:30px 0 12px;color:#111827}
.article h3{font-size:22px;margin:22px 0 10px;color:#0f4073}
.article p{margin-bottom:14px;color:#4b5563}
.article ul{padding-left:22px;margin:10px 0 18px}
.article li{margin-bottom:8px;color:#4b5563}
.code{background:#07111f;color:#dbeafe;border-radius:18px;padding:22px;overflow:auto;font-family:Consolas,Monaco,monospace;font-size:14px;margin-top:16px}
.cta{background:linear-gradient(135deg,#07111f,#0066cc);color:#fff;border-radius:28px;padding:46px;text-align:center}
.cta h2{font-size:34px;margin-bottom:12px}
.cta p{max-width:780px;margin:0 auto 24px;color:rgba(255,255,255,.84)}
.footer{background:#1a1a1a;color:#fff;padding:60px 0 20px}
.footer-content{display:grid;grid-template-columns:1fr 2fr;gap:60px;margin-bottom:40px}
.footer-logo .logo-text{color:#fff}
.footer-description{color:#ccc;line-height:1.7}
.footer-links{display:grid;grid-template-columns:repeat(3,1fr);gap:40px}
.footer-column h4{font-size:1rem;margin-bottom:18px;color:#fff}
.footer-column ul{list-style:none}
.footer-column li{margin-bottom:10px}
.footer-column a{color:#ccc}
.footer-column a:hover{color:var(--light-blue)}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid #333;color:#fff;font-size:12px}
@media(max-width:1024px){
 .hero-grid{grid-template-columns:1fr}
 .grid.four{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:900px){
 .nav-menu{display:none;position:absolute;top:70px;left:0;right:0;background:#fff;flex-direction:column;gap:0;border-bottom:1px solid #e5e7eb;box-shadow:0 18px 40px rgba(0,0,0,.08)}
 .nav-menu.active{display:flex}
 .nav-menu li{border-top:1px solid #f1f5f9}
 .nav-link{display:block;padding:15px 22px}
 .nav-toggle{display:flex}
 .lang-switch{margin-left:0}
 .hero{padding:78px 0 60px}
 .hero h1{font-size:34px}
 .hero p{font-size:16px}
 .grid,.grid.two,.grid.four,.arch-grid{grid-template-columns:1fr}
 .section{padding:58px 0}
 .section-title{font-size:28px}
 .article{padding:26px}
 .flow-item{grid-template-columns:1fr}
 .footer-content{grid-template-columns:1fr;gap:34px}
 .footer-links{grid-template-columns:1fr}
}
@media(max-width:520px){
 .container{padding:0 15px}
 .logo-text{font-size:20px}
 .hero h1{font-size:29px}
 .hero-actions{flex-direction:column}
 .btn{width:100%}
 .card,.hero-panel{padding:24px}
 .cta{padding:32px 22px}
}