:root{
  --bg:#f6f8fc;
  --panel:#ffffff;
  --text:#182033;
  --muted:#5f6b7a;
  --line:#dfe6f2;
  --accent:#274c9b;
  --accent-2:#0f766e;
  --soft:#eef4ff;
  --shadow:0 18px 45px rgba(24,32,51,.10);
}
*{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(--text);background:var(--bg);line-height:1.7}
a{color:inherit;text-decoration:none}
img,video{max-width:100%;display:block}
video{width:100%;height:100%;object-fit:cover;background:#eef3f8}
.site-header{background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(14px)}
.topbar{display:flex;gap:.5rem;align-items:center;justify-content:center;padding:.42rem 1rem;background:#10213f;color:#fff;font-size:.92rem;flex-wrap:wrap}.topbar-note{opacity:.78}.navbar{max-width:1180px;margin:auto;display:flex;align-items:center;justify-content:space-between;padding:1rem}.logo,.footer-logo{display:inline-flex;align-items:center;gap:.65rem;font-weight:800}.logo-mark{display:inline-grid;place-items:center;width:44px;height:44px;border-radius:15px;background:linear-gradient(135deg,#264b9a,#0f766e);color:#fff;letter-spacing:-.04em}.logo-text{white-space:nowrap}.nav-menu{list-style:none;display:flex;gap:.25rem;margin:0;padding:0;flex-wrap:wrap;justify-content:flex-end}.nav-menu a{display:block;padding:.65rem .72rem;border-radius:999px;color:#334155;font-size:.95rem}.nav-menu a:hover{background:var(--soft);color:var(--accent)}.nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:10px;padding:.5rem .75rem}.search-wrap{max-width:1180px;margin:0 auto 1rem;padding:0 1rem}.search-form{display:flex;gap:.7rem}.search-form input{flex:1;border:1px solid var(--line);border-radius:15px;padding:.85rem 1rem;font-size:1rem;background:#fff}.search-form button,.btn,.copy-link{border:0;border-radius:14px;padding:.85rem 1.1rem;font-weight:700;cursor:pointer}.search-form button,.primary,.copy-link{background:var(--accent);color:#fff}.secondary{background:#e7eefc;color:#18366f}.search-hint{margin:.45rem 0 0;color:var(--muted);font-size:.92rem}.sr-only{position:absolute;width:1px;height:1px;clip:rect(0,0,0,0);overflow:hidden;white-space:nowrap}.breadcrumb{max-width:1180px;margin:0 auto;padding:1rem;color:var(--muted);font-size:.95rem}.breadcrumb a{color:var(--accent);font-weight:700}.hero,.inner-hero,.section,.contact-band{max-width:1180px;margin:0 auto 1.2rem;padding:3rem 1rem}.compact-hero{min-height:420px;display:grid;align-items:center}.hero-content{max-width:820px}.hero,.inner-hero{background:linear-gradient(135deg,#fff,#eef5ff);border:1px solid var(--line);border-radius:30px;box-shadow:var(--shadow)}.inner-hero{display:grid;grid-template-columns:1.05fr .95fr;gap:2rem;align-items:center}.hero-figure{margin:0}.hero-figure img{border-radius:22px;border:1px solid var(--line);box-shadow:var(--shadow)}figcaption{color:var(--muted);font-size:.92rem;margin-top:.7rem}.eyebrow{font-weight:800;color:var(--accent-2);letter-spacing:.08em;text-transform:uppercase;margin:0 0 .45rem}h1{font-size:clamp(2.1rem,6vw,4.7rem);line-height:1.08;margin:.2rem 0 1rem;letter-spacing:-.055em}h2{font-size:clamp(1.65rem,3vw,2.55rem);line-height:1.18;margin:.2rem 0 .6rem;letter-spacing:-.035em}h3{line-height:1.35;margin:.2rem 0 .55rem}.hero-lead,.section-head p,.inner-hero p{color:var(--muted);font-size:1.05rem}.hero-actions{display:flex;gap:.8rem;flex-wrap:wrap;margin:1.4rem 0}.btn{display:inline-flex;align-items:center;justify-content:center}.domain-card{display:inline-block;background:#fff;border:1px solid var(--line);border-radius:16px;padding:.75rem 1rem;box-shadow:0 8px 24px rgba(24,32,51,.06);color:var(--text)!important}.section{background:transparent}.section.soft{max-width:none;background:#eef4fb;padding-left:calc((100% - 1180px)/2 + 1rem);padding-right:calc((100% - 1180px)/2 + 1rem)}.section-head{max-width:760px;margin-bottom:1.5rem}.grid{display:grid;gap:1rem}.cards.four{grid-template-columns:repeat(4,1fr)}.cards.three{grid-template-columns:repeat(3,1fr)}.video-grid{grid-template-columns:repeat(4,1fr)}.card,.video-card,.contact-panel{background:var(--panel);border:1px solid var(--line);border-radius:22px;padding:1.2rem;box-shadow:0 10px 30px rgba(24,32,51,.06)}.feature-card{min-height:250px}.tag-row{display:flex;gap:.45rem;flex-wrap:wrap;margin:.8rem 0}.tag-row span,.pill,.version{display:inline-flex;border:1px solid #c8d7f3;background:#eef4ff;color:#1c4389;border-radius:999px;padding:.25rem .6rem;font-size:.82rem;font-weight:700}.metric{display:block;margin-top:auto;color:var(--accent)}.video-card{padding:0;overflow:hidden}.video-frame{position:relative;aspect-ratio:16/9;background:#e9eef6}.play-badge{position:absolute;inset:50% auto auto 50%;transform:translate(-50%,-50%) scale(.78);width:64px;height:64px;border-radius:50%;display:grid;place-items:center;background:rgba(255,255,255,.94);box-shadow:var(--shadow);opacity:0;transition:.22s ease;font-size:1.5rem;color:var(--accent)}.video-card:hover .play-badge{opacity:1;transform:translate(-50%,-50%) scale(1)}.video-body{padding:1rem}.stats{display:flex;gap:.6rem;flex-wrap:wrap;color:var(--muted);font-size:.9rem}.timeline{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:1rem;padding:0;margin:0}.timeline li{background:#fff;border:1px solid var(--line);border-radius:22px;padding:1.2rem}.timeline span{display:inline-grid;place-items:center;width:44px;height:44px;border-radius:14px;background:#10213f;color:#fff;font-weight:800}.faq-list{display:grid;gap:.8rem}.faq-list details{background:#fff;border:1px solid var(--line);border-radius:18px;padding:1rem 1.2rem}.faq-list summary{font-weight:800;cursor:pointer}.review-card .role{color:var(--muted);font-size:.92rem}.contact-band{display:flex;justify-content:space-between;align-items:center;gap:1rem;background:#10213f;color:#fff;border-radius:28px}.contact-band p{color:#d9e3f6}.site-footer{background:#0c1729;color:#e8eef8;margin-top:2rem;padding:2.5rem 1rem}.site-footer>section,.site-footer>p{max-width:1180px;margin-left:auto;margin-right:auto}.footer-brand,.footer-links,.footer-share{margin-bottom:1.3rem}.footer-links{display:flex;gap:1rem;flex-wrap:wrap}.footer-links a{color:#dce8ff}.update-time,.copyright{color:#aab8ce}.copy-result{margin-left:.7rem;color:#c9f5e6}@media (max-width:980px){.cards.four,.video-grid,.timeline{grid-template-columns:repeat(2,1fr)}.cards.three,.inner-hero{grid-template-columns:1fr}.nav-toggle{display:block}.nav-menu{display:none;width:100%;padding-top:.8rem}.nav-menu.open{display:grid;grid-template-columns:repeat(2,1fr)}.navbar{align-items:flex-start;flex-wrap:wrap}.contact-band{display:block}.contact-band .btn{margin-top:1rem}}@media (max-width:620px){.cards.four,.cards.three,.video-grid,.timeline{grid-template-columns:1fr}.hero,.inner-hero,.section,.contact-band{padding:2rem 1rem;border-radius:22px}.search-form{flex-direction:column}.nav-menu.open{grid-template-columns:1fr}h1{font-size:2.25rem}.topbar{justify-content:flex-start}}