:root{
  --primary:#0b5cab; --primary-d:#084a8f; --accent:#ff7a1a; --teal:#00b389;
  --ink:#15233b; --muted:#5b6b85; --bg:#ffffff; --bg-alt:#f4f7fb;
  --line:#e4eaf3; --radius:14px; --shadow:0 10px 30px rgba(20,40,80,.08);
  --header-h:68px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%}
h1,h2,h3,h4{margin:0 0 .5em;line-height:1.25;font-weight:700}
p{margin:0 0 1em}
.container{width:100%;max-width:1140px;margin:0 auto;padding:0 20px}

/* icons */
.ic{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:none}
.ic.big{width:120px;height:120px;opacity:.15}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 20px;border-radius:999px;font-weight:600;font-size:15px;cursor:pointer;border:2px solid transparent;transition:.2s;white-space:nowrap}
.btn-lg{padding:14px 28px;font-size:16px}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-d)}
.btn-outline{background:transparent;border-color:var(--primary);color:var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}
.btn-light{background:#fff;color:var(--primary)}
.btn-light:hover{background:#eef4ff}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:var(--header-h)}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--ink)}
.brand-mark{display:inline-flex;color:var(--primary);background:#eaf2ff;padding:8px;border-radius:10px}
.nav{display:flex;align-items:center;gap:6px}
.nav-link{padding:8px 14px;border-radius:8px;color:var(--muted);font-weight:600;font-size:15px}
.nav-link:hover,.nav-link.active{color:var(--primary);background:#eef4ff}
.nav-actions{display:flex;align-items:center;gap:10px;margin-left:14px}
.lang-switch{padding:8px 12px;border:1px solid var(--line);border-radius:8px;font-weight:600;font-size:14px;color:var(--muted)}
.lang-switch:hover{border-color:var(--primary);color:var(--primary)}
.nav-toggle{display:none;background:none;border:none;color:var(--ink);cursor:pointer;padding:8px}
.nav-toggle .ic{width:28px;height:28px}

/* hero */
.hero{position:relative;background:linear-gradient(135deg,#0b5cab 0%,#0a8f9e 55%,#00b389 100%);color:#fff;overflow:hidden}
.hero:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 80% 20%,rgba(255,255,255,.18),transparent 40%)}
.hero-inner{position:relative;padding:84px 20px;text-align:center;max-width:880px;margin:0 auto}
.hero-sm .hero-inner{padding:60px 20px}
.hero-badge{display:inline-block;background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.35);padding:6px 14px;border-radius:999px;font-size:14px;margin-bottom:18px}
.hero-title{font-size:clamp(28px,4.5vw,46px);margin-bottom:16px}
.hero-sub{font-size:clamp(15px,2vw,19px);opacity:.92;max-width:760px;margin:0 auto 28px}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* sections */
.section{padding:64px 0}
.section-alt{background:var(--bg-alt)}
.section-head{text-align:center;max-width:680px;margin:0 auto 40px}
.section-head h2{font-size:clamp(24px,3vw,34px)}
.section-head p{color:var(--muted)}

/* stats */
.stats-section{padding:0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:-44px;background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.stat{padding:28px 18px;text-align:center;border-right:1px solid var(--line)}
.stat:last-child{border-right:none}
.stat-num{font-size:34px;font-weight:800;color:var(--primary)}
.stat-label{color:var(--muted);font-size:14px;margin-top:4px}

/* cards */
.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.2s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#cfe0f7}
.card-icon{display:inline-flex;align-items:center;justify-content:center;width:54px;height:54px;border-radius:14px;background:#eaf2ff;color:var(--primary);margin-bottom:14px}
.card h3{font-size:19px}
.card p{color:var(--muted);margin:0}
.platform h3{color:var(--primary)}

/* chips */
.chips{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-bottom:28px}
.chip{background:#fff;border:1px solid var(--line);padding:10px 20px;border-radius:999px;font-weight:600;color:var(--ink);transition:.2s}
.chip:hover{border-color:var(--primary);color:var(--primary);box-shadow:var(--shadow)}
.center{text-align:center}

/* split */
.split{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
.split-media{display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#eaf2ff,#e6fbf3);border-radius:24px;min-height:280px;color:var(--primary)}
.tick-list{list-style:none;padding:0;margin:18px 0 24px}
.tick-list li{display:flex;align-items:flex-start;gap:10px;margin-bottom:12px;color:var(--muted)}
.tick-list .ic{color:var(--teal);width:22px;height:22px;margin-top:2px}

/* faq */
.faq{max-width:820px;margin:0 auto}
.faq-item{border:1px solid var(--line);border-radius:12px;margin-bottom:12px;overflow:hidden;background:#fff}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px 20px;background:none;border:none;font-size:17px;font-weight:600;cursor:pointer;text-align:left;color:var(--ink)}
.faq-ic{transition:.25s;color:var(--primary)}
.faq-item.open .faq-ic{transform:rotate(90deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-item.open .faq-a{max-height:300px}
.faq-a p{padding:0 20px 18px;color:var(--muted);margin:0}

/* cta band */
.cta-band{background:linear-gradient(135deg,#0b5cab,#00b389);color:#fff;text-align:center}
.cta-inner{padding:56px 20px;max-width:760px;margin:0 auto}
.cta-inner h2{font-size:clamp(24px,3vw,34px)}
.cta-inner p{opacity:.92;margin-bottom:24px}

/* footer */
.site-footer{background:#0d1b2e;color:#c7d3e6}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px;padding:54px 20px 30px}
.footer-brand{color:#fff;font-size:20px}
.footer-slogan{color:#8ea3c2;margin-top:10px;max-width:320px}
.site-footer h4{color:#fff;font-size:16px;margin-bottom:14px}
.footer-info{list-style:none;padding:0;margin:0}
.footer-info li{display:flex;align-items:center;gap:10px;margin-bottom:10px;color:#a9b8d2}
.footer-info .ic{color:var(--teal);width:18px;height:18px}
.footer-links{list-style:none;padding:0;margin:0}
.footer-links li{margin-bottom:8px}
.footer-links a{color:#a9b8d2}
.footer-links a:hover{color:#fff}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;border-top:1px solid #1c2c45;padding:18px 20px;color:#7e90b0;font-size:14px}
.footer-bottom .lang-switch{color:#a9b8d2;border-color:#1c2c45}

/* contact */
.contact-layout{display:grid;grid-template-columns:1fr 1.1fr;gap:40px}
.contact-info .contact-card{display:flex;align-items:center;gap:14px;padding:14px 0;border-bottom:1px solid var(--line)}
.contact-card .ic{width:34px;height:34px;color:var(--primary);background:#eaf2ff;border-radius:10px;padding:6px}
.contact-card span{display:block;font-size:13px;color:var(--muted)}
.contact-card p{margin:2px 0 0;font-weight:600}
.contact-form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
.contact-form label{display:block;margin-bottom:14px;font-weight:600;font-size:14px;color:var(--ink)}
.contact-form input,.contact-form select,.contact-form textarea{width:100%;margin-top:6px;padding:11px 13px;border:1px solid var(--line);border-radius:10px;font-size:15px;font-family:inherit;background:#fff;color:var(--ink)}
.contact-form input:focus,.contact-form select:focus,.contact-form textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #eaf2ff}
.req{color:var(--accent)}
.form-note{color:var(--muted);font-size:13px}
.form-msg{margin:10px 0 0;font-weight:600}
.form-msg.ok{color:var(--teal)}
.form-msg.err{color:#e0414a}

/* info + map */
.info-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:24px}
.info-label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px;text-transform:uppercase;letter-spacing:.04em}
.info-grid p{font-weight:600;margin:0}
.map-wrap{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line)}
.map{width:100%;height:340px;border:0;display:block}
.map-note{padding:8px 14px;margin:0;font-size:13px;color:var(--muted);background:var(--bg-alt)}

/* about */
.about-grid{display:grid;grid-template-columns:1.3fr .7fr;gap:44px}
.mission{font-size:20px;font-weight:600;color:var(--primary)}
.timeline{border-left:3px solid var(--primary);padding-left:20px}
.timeline h3{margin-bottom:18px}
.timeline-item{margin-bottom:20px;position:relative}
.timeline-item:before{content:"";position:absolute;left:-28px;top:4px;width:12px;height:12px;border-radius:50%;background:var(--primary);border:3px solid #fff;box-shadow:0 0 0 3px #eaf2ff}
.tl-year{font-weight:800;color:var(--primary)}
.tl-title{color:var(--muted)}

/* scroll top */
.scroll-top{position:fixed;right:20px;bottom:20px;width:46px;height:46px;border:none;border-radius:12px;background:var(--primary);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:.25s;z-index:40}
.scroll-top.show{opacity:1;pointer-events:auto}
.scroll-top .ic{width:22px;height:22px;stroke:#fff}

/* responsive */
@media(max-width:860px){
  .nav-toggle{display:inline-flex}
  .nav{position:absolute;top:var(--header-h);left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:12px 20px;gap:4px;display:none;box-shadow:var(--shadow)}
  .nav.open{display:flex}
  .nav-link{padding:12px 8px}
  .nav-actions{margin:10px 0 0;flex-wrap:wrap}
  .stats-grid{grid-template-columns:repeat(2,1fr);margin-top:0;border-radius:0}
  .stat{border-bottom:1px solid var(--line)}
  .split,.contact-layout,.about-grid,.info-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
}

/* blog */
.narrow{max-width:820px;margin:0 auto}
.blog-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:22px}
.blog-card{padding:0;overflow:hidden;display:flex;flex-direction:column}
.blog-thumb{display:block;height:150px;background:linear-gradient(135deg,#0b5cab,#00b389)}
.blog-card-body{padding:20px;display:flex;flex-direction:column;flex:1}
.blog-meta{display:flex;gap:12px;align-items:center;font-size:13px;color:var(--muted);margin-bottom:8px;flex-wrap:wrap}
.blog-cat{background:#eaf2ff;color:var(--primary);padding:3px 10px;border-radius:999px;font-weight:600}
.blog-card h3{font-size:18px;margin:0 0 8px}
.blog-card h3 a:hover{color:var(--primary)}
.blog-card p{color:var(--muted);flex:1;margin-bottom:14px}
.blog-more{color:var(--primary);font-weight:600}
.blog-post{max-width:760px;margin:0 auto}
.breadcrumb{font-size:14px;color:var(--muted);margin-bottom:18px}
.breadcrumb a{color:var(--primary)}
.breadcrumb span{margin:0 8px;color:#c3ccdb}
.blog-title{font-size:clamp(26px,3.4vw,38px);margin:6px 0 10px}
.blog-author{color:var(--muted);font-weight:600}
.blog-body{margin-top:18px;font-size:16px;line-height:1.8}
.blog-body h2{font-size:22px;margin:28px 0 12px;font-weight:700}
.blog-body ul{margin:0 0 18px;padding-left:22px}
.blog-body li{margin-bottom:8px;color:var(--muted)}
.blog-body p{color:#2a3a55}
.blog-back{display:inline-block;margin-top:30px;color:var(--primary);font-weight:600}
.empty-note{text-align:center;color:var(--muted);padding:40px 0}

/* footer icp */
.icp{color:#7e90b0;font-size:13px;text-decoration:underline}
.icp:hover{color:#fff}