:root{--paper:#f5f0e6;--ink:#181b20;--muted:#64696f;--line:#d6cebf;--blue:#265ee8;--violet:#7048d8;--amber:#c47b18;--white:#fffdf8}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.75 Inter,"Noto Sans SC","Microsoft YaHei",sans-serif}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.wrap{width:min(1180px,calc(100% - 40px));margin:auto}.top{position:sticky;top:0;z-index:20;background:rgba(245,240,230,.94);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.nav{height:72px;display:flex;align-items:center;gap:30px}.brand{font-size:21px;font-weight:800;letter-spacing:-.02em}.brand i{color:var(--blue);font-style:normal}.links{margin-left:auto;display:flex;gap:24px;font-size:14px}.button{display:inline-flex;align-items:center;justify-content:center;padding:11px 17px;border:1px solid var(--ink);font-weight:700;font-size:14px}.primary{background:var(--ink);color:white}.hero{padding:44px 0 70px}.hero-frame{position:relative;min-height:600px;border:1px solid var(--line);background:var(--white);overflow:hidden}.hero-frame img{width:100%;height:100%;min-height:600px;object-fit:cover}.hero-copy{position:absolute;left:5.5%;top:10%;width:43%;padding:24px 0}.eyebrow{display:flex;gap:10px;align-items:center;color:var(--blue);font-size:13px;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.eyebrow:before{content:"";width:30px;border-top:2px solid}.hero h1{font-size:clamp(42px,6.5vw,86px);line-height:.98;letter-spacing:-.06em;margin:22px 0}.hero h1 span{display:block;font-size:.46em;letter-spacing:.03em;margin-top:20px}.lead{font-size:18px;max-width:560px;color:#4f5358}.actions{display:flex;gap:12px;margin-top:28px}.indexbar{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-top:0;background:var(--white)}.indexbar a{padding:22px;border-right:1px solid var(--line)}.indexbar a:last-child{border:0}.indexbar small{display:block;color:var(--muted)}section{padding:90px 0;border-top:1px solid var(--line)}.section-head{display:grid;grid-template-columns:1fr 1fr;gap:50px;margin-bottom:46px}.section-head h2{font-size:clamp(32px,4vw,56px);line-height:1.08;margin:0;letter-spacing:-.04em}.section-head p{margin:7px 0;color:var(--muted)}.rings{display:grid;grid-template-columns:1.1fr 1fr 1fr;border:1px solid var(--line);background:var(--white)}.ring{padding:38px;border-right:1px solid var(--line)}.ring:last-child{border:0}.ring b{display:block;font-size:24px;margin:12px 0}.ring .circle{width:48px;height:48px;border:2px solid var(--blue);border-radius:50%;box-shadow:inset 0 0 0 8px var(--white),inset 0 0 0 10px var(--violet)}.matrix{display:grid;grid-template-columns:200px 1fr}.matrix div{padding:22px;border-bottom:1px solid var(--line)}.matrix div:nth-child(odd){font-weight:800;color:var(--blue)}.devices{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}.device{background:var(--white);padding:32px}.device h3{font-size:23px}.device a{color:var(--blue);font-weight:700}.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:30px}.step{border-top:3px solid var(--ink);padding-top:18px}.step strong{color:var(--blue);font-size:13px}.articles{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}.card{border:1px solid var(--line);background:var(--white);padding:28px}.card time,.card small{color:var(--muted)}.card h3{font-size:25px;line-height:1.25;margin:12px 0}.card a{color:var(--blue);font-weight:750}.faq details{border-top:1px solid var(--line);padding:22px 0}.faq summary{font-size:19px;font-weight:750;cursor:pointer}.faq p{color:var(--muted)}footer{padding:54px 0;background:#1c1f24;color:#e8e3da}.footergrid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px}.footergrid p{color:#aeb1b5}.article-hero{padding:80px 0 50px;border-bottom:1px solid var(--line)}.article-hero h1{max-width:900px;font-size:clamp(38px,6vw,72px);line-height:1.08;letter-spacing:-.05em}.article-main{max-width:820px;margin:0 auto;padding:70px 0}.article-main h2{font-size:31px;margin-top:52px;line-height:1.25}.article-main p{font-size:18px;color:#30343a}.notice{border-left:3px solid var(--blue);padding:18px 22px;background:var(--white);margin:30px 0}.breadcrumbs{font-size:14px;color:var(--muted)}@media(max-width:800px){.links{display:none}.wrap{width:min(100% - 28px,1180px)}.hero{padding-top:20px}.hero-frame,.hero-frame img{min-height:600px}.hero-frame img{object-position:66% center;opacity:.55}.hero-copy{width:88%;top:4%;left:6%}.hero h1{font-size:52px}.indexbar{grid-template-columns:1fr 1fr}.indexbar a:nth-child(2){border-right:0}.section-head{grid-template-columns:1fr;gap:12px}.rings,.devices,.flow,.articles{grid-template-columns:1fr}.ring{border-right:0;border-bottom:1px solid var(--line)}.matrix{grid-template-columns:1fr}.matrix div:nth-child(odd){padding-bottom:4px}.footergrid{grid-template-columns:1fr}.actions{flex-wrap:wrap}section{padding:64px 0}.article-main{padding:45px 0}.article-main p{font-size:17px}}
/* Hero text separation: the artwork already contains its own brand typography. */
.hero-frame{min-height:0;display:grid;grid-template-columns:1fr;background:var(--white)}
.hero-frame>img{width:100%;height:auto;min-height:0;object-fit:contain;object-position:center}
.hero-copy{position:static;width:auto;padding:30px 34px;border-top:1px solid var(--line);display:grid;grid-template-columns:minmax(220px,.8fr) minmax(260px,1.25fr) auto;gap:26px;align-items:center;background:var(--white)}
.hero-copy .eyebrow{display:none}
.hero-copy h1{font-size:34px;line-height:1.1;letter-spacing:-.035em;margin:0}
.hero-copy h1 span{display:inline;font-size:1em;letter-spacing:-.035em;margin:0 0 0 .35em}
.hero-copy .lead{margin:0;font-size:16px;max-width:620px}
.hero-copy .actions{margin:0;justify-content:flex-end;flex-wrap:wrap}
@media(max-width:800px){.hero-frame,.hero-frame>img{min-height:0}.hero-frame>img{height:auto;object-fit:contain;object-position:center;opacity:1}.hero-copy{width:auto;padding:24px 20px;display:block}.hero-copy h1{font-size:31px}.hero-copy h1 span{display:block;margin:8px 0 0}.hero-copy .lead{margin-top:14px}.hero-copy .actions{margin-top:20px;justify-content:flex-start}}

/* Mobile navigation restoration. */
@media(max-width:800px){
  .top{position:sticky;top:0}
  .nav{height:auto;min-height:64px;display:flex;flex-wrap:wrap;gap:10px 14px;padding:10px 0 8px}
  .nav .brand{margin-right:auto}
  .nav>.button{padding:8px 11px;font-size:12px}
  .nav .links{display:flex;order:3;width:100%;gap:20px;overflow-x:auto;overscroll-behavior-inline:contain;padding:9px 2px 3px;border-top:1px solid var(--line);white-space:nowrap;scrollbar-width:none}
  .nav .links::-webkit-scrollbar{display:none}
  .nav .links a{display:block;flex:0 0 auto;font-size:13px;font-weight:700}
}

/* Collapsible mobile navigation. */
.mobile-menu{display:none}
@media(max-width:800px){
  .nav{position:relative;min-height:64px;padding:10px 0;flex-wrap:nowrap}
  .nav>.links,.nav>.button{display:none}
  .mobile-menu{display:block;margin-left:auto}
  .mobile-menu summary{width:42px;height:42px;border:1px solid var(--ink);display:grid;place-content:center;gap:5px;cursor:pointer;list-style:none;background:var(--white)}
  .mobile-menu summary::-webkit-details-marker{display:none}
  .mobile-menu summary span{display:block;width:19px;height:2px;background:var(--ink);transition:transform .18s ease,opacity .18s ease}
  .mobile-menu[open] summary span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .mobile-menu[open] summary span:nth-child(2){opacity:0}
  .mobile-menu[open] summary span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .mobile-menu nav{position:absolute;z-index:30;right:0;top:calc(100% + 1px);width:min(280px,calc(100vw - 28px));padding:10px;background:var(--white);border:1px solid var(--line);box-shadow:0 18px 40px rgba(24,27,32,.16)}
  .mobile-menu nav a{display:block;padding:12px 14px;border-bottom:1px solid var(--line);font-size:14px;font-weight:700}
  .mobile-menu nav a:last-child{border-bottom:0}
  .mobile-menu nav .menu-download{margin-top:8px;background:var(--ink);color:white;text-align:center}
}