:root{
    --blue:#2962ff;
    --blue2:#5b8cff;
    --ink:#0f172a;
    --muted:#64748b;
    --line:#e7edf6;
    --bg:#f7f9fc;
    --card:#ffffff;
    --radius:22px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
    margin:0;
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;
    color:var(--ink);
    background:#fff;
    line-height:1.75;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(1180px,calc(100% - 40px));margin:auto}
.header{
    position:sticky;top:0;z-index:50;
    backdrop-filter:blur(14px);
    background:rgba(255,255,255,.86);
    border-bottom:1px solid rgba(231,237,246,.85);
}
.nav{height:76px;display:flex;align-items:center;justify-content:space-between;gap:28px}
.logo img{width:162px;height:auto}
.navlinks{display:flex;gap:24px;align-items:center;color:#334155;font-size:15px}
.btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:46px;padding:0 22px;border-radius:14px;font-weight:700;
    background:var(--blue);color:white;box-shadow:0 12px 26px rgba(41,98,255,.22)
}
.btn.secondary{background:white;color:var(--ink);border:1px solid var(--line);box-shadow:none}
.hero{padding:54px 0 36px;background:linear-gradient(180deg,#f6f9ff 0,#fff 100%)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.eyebrow{font-size:14px;font-weight:800;color:var(--blue);letter-spacing:.08em;text-transform:uppercase}
h1{font-size:clamp(44px,7vw,78px);line-height:1.02;margin:10px 0 20px;letter-spacing:-.045em}
.hero p{font-size:19px;color:#475569;max-width:690px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.hero-art{position:relative}
.hero-art img{border-radius:28px;box-shadow:0 28px 70px rgba(15,23,42,.18);aspect-ratio:16/10;object-fit:cover}
.hero-badge{position:absolute;right:-14px;bottom:22px;background:#fff;padding:14px 18px;border-radius:16px;box-shadow:0 12px 35px rgba(15,23,42,.18);font-weight:700}
.section{padding:78px 0}
.section.alt{background:var(--bg)}
.section-title{font-size:38px;line-height:1.2;margin:0 0 12px}
.section-sub{color:var(--muted);max-width:760px;margin:0 0 32px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{border:1px solid var(--line);border-radius:var(--radius);background:#fff;padding:26px;box-shadow:0 10px 30px rgba(15,23,42,.04)}
.card h3{margin:8px 0 8px;font-size:21px}
.card p{color:var(--muted);margin:0}
.card .icon{font-size:30px}
.downloads{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.download-item{padding:20px;border:1px solid var(--line);border-radius:18px;background:#fff}
.download-item strong{display:block;font-size:17px}
.download-item span{color:var(--muted);font-size:14px}
.gallery{display:grid;grid-template-columns:2fr 1fr 1fr;gap:14px}
.gallery img{width:100%;height:280px;object-fit:cover;border-radius:20px}
.gallery img:first-child{height:574px;grid-row:span 2}
.article-list{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.article-card{border:1px solid var(--line);border-radius:20px;overflow:hidden;background:#fff;transition:.25s}
.article-card:hover{transform:translateY(-4px);box-shadow:0 16px 38px rgba(15,23,42,.09)}
.article-card img{width:100%;height:190px;object-fit:cover}
.article-card .inner{padding:18px}
.article-card h3{font-size:18px;line-height:1.45;margin:6px 0 10px}
.meta{font-size:13px;color:#94a3b8}
.breadcrumbs{font-size:14px;color:var(--muted);padding:22px 0}
.article-hero{display:grid;grid-template-columns:1fr .9fr;gap:36px;align-items:center;padding:20px 0 34px}
.article-hero h1{font-size:46px;line-height:1.12}
.article-hero img{border-radius:24px;aspect-ratio:16/10;object-fit:cover}
.article-wrap{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:34px;align-items:start}
.article-body{font-size:17px}
.article-body section{padding:10px 0 18px;border-bottom:1px solid #edf1f7}
.article-body h2{font-size:27px;line-height:1.3;margin:22px 0 10px}
.article-body p{color:#334155}
.sidebar{position:sticky;top:96px}
.sidebox{border:1px solid var(--line);border-radius:18px;padding:20px;background:#fff;margin-bottom:16px}
.sidebox h3{margin-top:0;font-size:17px}
.sidebox a{display:block;padding:9px 0;border-bottom:1px dashed var(--line);font-size:14px;color:#334155}
.notice{padding:16px 18px;border-radius:14px;background:#f3f7ff;border:1px solid #dbe7ff;color:#334155;font-size:14px}
.footer{background:#0b1220;color:#cbd5e1;padding:48px 0 28px;margin-top:70px}
.footer-top{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:28px}
.footer .logo img{filter:brightness(0) invert(1);width:160px}
.footer h4{color:#fff}
.footer a{display:block;color:#cbd5e1;margin:8px 0}
.copyright{border-top:1px solid #1e293b;margin-top:30px;padding-top:22px;font-size:13px;color:#64748b}
@media(max-width:900px){
    .hero-grid,.article-hero,.article-wrap{grid-template-columns:1fr}
    .grid3,.article-list{grid-template-columns:1fr 1fr}
    .downloads{grid-template-columns:1fr 1fr}
    .gallery{grid-template-columns:1fr 1fr}
    .gallery img:first-child{grid-row:auto;height:280px;grid-column:span 2}
    .sidebar{position:static}
    .navlinks{display:none}
}
@media(max-width:620px){
    .container{width:min(100% - 28px,1180px)}
    .grid3,.article-list,.downloads,.gallery{grid-template-columns:1fr}
    .gallery img:first-child{grid-column:auto;height:250px}
    .gallery img{height:250px}
    .article-hero h1{font-size:36px}
}