*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--bg:#ffffff;--text:#1a1a1a;--muted:#4a5568;--primary:#0066cc;--primary-600:#0052a3;--link:#0066cc;--surface:#ffffff;--surface-2:#f8fafc;--surface-3:#f7fafc;--surface-4:#e6f2ff;--border:#e5e7eb;--border-2:#d1d5db;--footer-bg:#1a202c;--footer-text:#cbd5e1;--footer-strong:#ffffff;--footer-muted:#94a3b8;--callout-bg:#fffef0;--callout-accent:#ffc107;--badge-bg:#e6f2ff;--badge-text:#0066cc;--shadow:0 1px 3px rgba(0,0,0,.08);--shadow-lg:0 8px 20px rgba(0,0,0,.1);--shadow-header:0 2px 8px rgba(0,0,0,.06);--focus:rgba(0,102,204,.1);--hero-grad:linear-gradient(135deg,#667eea 0%,#764ba2 100%)}
[data-theme="dark"]{--bg:#0b1118;--text:#e5e7eb;--muted:#a3b1c6;--primary:#4ea1ff;--primary-600:#3b82f6;--link:#7cc1ff;--surface:#0e1521;--surface-2:#0b1118;--surface-3:#111927;--surface-4:#0d2038;--border:#223044;--border-2:#2b3b52;--footer-bg:#0a0f16;--footer-text:#a6b3c6;--footer-strong:#e5e7eb;--footer-muted:#7b8aa1;--callout-bg:#0f172a;--callout-accent:#f59e0b;--badge-bg:#0d2038;--badge-text:#93c5fd;--shadow:0 1px 3px rgba(0,0,0,.4);--shadow-lg:0 8px 20px rgba(0,0,0,.35);--shadow-header:0 2px 12px rgba(0,0,0,.5);--focus:rgba(78,161,255,.25);--hero-grad:linear-gradient(135deg,#1f3a6d 0%,#2a2259 100%)}
html{font-size:16px;line-height:1.6}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;color:var(--text);background:var(--bg);transition:background-color .2s,color .2s}
a{color:var(--link);text-decoration:none}a:hover{text-decoration:underline}
img{display:block;max-width:100%;height:auto}
.skip{position:absolute;left:-9999px;top:0;z-index:999}.skip:focus{left:0;background:var(--primary);color:#fff;padding:.5rem 1rem}
.container{max-width:1200px;margin:0 auto;padding:0 1.25rem}
.header{background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;transition:box-shadow .2s,background-color .2s,border-color .2s}
.header.scrolled{box-shadow:var(--shadow-header)}
.header-wrap{display:flex;align-items:center;justify-content:space-between;min-height:70px;gap:1rem}
.logo{display:flex;align-items:center;gap:.75rem;font-size:1.3rem;font-weight:700;color:var(--text);text-decoration:none}.logo:hover{text-decoration:none}.logo img{border-radius:8px;height:96px;width:auto}
.header-actions{display:flex;align-items:center;gap:.5rem}
.nav{display:flex;gap:1.5rem;flex-wrap:wrap}
.nav a{color:var(--muted);font-weight:600;padding:.5rem;border-radius:6px;transition:all .2s}
.nav a:hover{color:var(--primary);background:var(--surface-2);text-decoration:none}
.nav a.active{color:var(--primary);background:var(--surface-4)}
.nav-toggle,.theme-toggle{display:none;align-items:center;justify-content:center;width:44px;height:44px;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text);cursor:pointer;transition:background-color .2s,border-color .2s,transform .2s}
.nav-toggle:hover,.theme-toggle:hover{transform:translateY(-1px)}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--text);margin:3px 0;border-radius:1px;transition:.2s}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.theme-toggle svg{pointer-events:none}
.theme-toggle .sun{display:inline}.theme-toggle .moon{display:none}
[data-theme="dark"] .theme-toggle .sun{display:none}[data-theme="dark"] .theme-toggle .moon{display:inline}
main{min-height:60vh;padding:2.5rem 0}
.breadcrumb{font-size:.9rem;color:#666;margin-bottom:1.25rem}.breadcrumb a{color:var(--primary)}
h1{font-size:2.75rem;font-weight:800;margin-bottom:1rem;line-height:1.15;color:var(--text)}
h2{font-size:1.5rem;font-weight:700;margin:2rem 0 1rem;color:var(--text)}
h3{font-size:1.2rem;font-weight:600;margin:1.5rem 0 .75rem;color:var(--text)}
.lead{font-size:1.2rem;color:var(--muted);margin-bottom:2rem;line-height:1.6}
.hero{background:var(--hero-grad);color:#fff;padding:5rem 0;text-align:center}
.hero h1{color:#fff;font-size:3.25rem;margin-bottom:1.25rem;font-weight:800}
.hero-lead{font-size:1.35rem;margin-bottom:2.5rem;opacity:.95;max-width:750px;margin-left:auto;margin-right:auto}
.hero-actions{display:flex;gap:1rem;justify-content:center;margin-bottom:2rem;flex-wrap:wrap}
.info-section{background:var(--surface-2);padding:4rem 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.info-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:2rem}
.info-box{background:var(--surface);border-radius:12px;padding:2rem;box-shadow:var(--shadow);transition:all .3s}
.info-box:hover{box-shadow:0 4px 12px rgba(0,0,0,.12);transform:translateY(-3px)}
.info-icon{width:48px;height:48px;border-radius:10px;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;display:flex;align-items:center;justify-content:center;margin-bottom:1.25rem}
.info-icon svg{width:24px;height:24px}
.info-box h3{margin:0 0 .75rem;font-size:1.25rem;color:var(--text)}
.info-box p{margin:0;color:var(--muted);line-height:1.6}
.categories{padding:3rem 0}
.section-title{font-size:2rem;font-weight:700;text-align:center;margin-bottom:2.5rem;color:var(--text)}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem;margin-top:1.5rem}
.grid-2{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.5rem;margin-top:1.5rem}
.grid-3{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.5rem;margin-top:1.5rem}
.card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:1.5rem;transition:all .3s;display:block;color:var(--text);box-shadow:var(--shadow)}
.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px);text-decoration:none;border-color:var(--primary)}
.card h2,.card h3{margin:0 0 .75rem;font-size:1.35rem;color:var(--text)}
.card p{color:var(--muted);margin:0;font-size:1rem;line-height:1.5}
.card ul{margin:1rem 0 0 1.25rem;color:var(--muted)}.card ul li{margin-bottom:.5rem}
.article-list{display:flex;flex-direction:column;gap:.85rem;margin-top:1.25rem}
.article-item{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:1.25rem;background:var(--surface);border:1px solid var(--border);border-radius:10px;transition:all .2s}
.article-item:hover{background:var(--surface-3);border-color:var(--primary);text-decoration:none;transform:translateX(4px)}
.article-title{flex:1;color:var(--text);font-weight:600;font-size:1.05rem}
.badge{display:inline-block;background:var(--badge-bg);color:var(--badge-text);padding:.3rem .75rem;border-radius:999px;font-size:.8rem;font-weight:700;white-space:nowrap}
.filters{display:flex;gap:.75rem;margin-bottom:1.25rem;flex-wrap:wrap}
.input{padding:.8rem 1rem;border:1px solid var(--border-2);border-radius:8px;font-size:1rem;font-family:inherit;flex:1;min-width:200px;background:var(--surface);color:var(--text);transition:border-color .2s,background-color .2s}
.input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--focus)}
.btn{display:inline-block;padding:.85rem 1.4rem;border-radius:10px;font-size:1.05rem;font-weight:700;cursor:pointer;border:none;transition:all .2s;text-align:center}
.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-600);text-decoration:none;transform:translateY(-2px);box-shadow:0 4px 12px rgba(0,102,204,.3)}
.btn-secondary{background:var(--surface);color:var(--primary);border:2px solid var(--primary)}.btn-secondary:hover{background:var(--surface-3);text-decoration:none;transform:translateY(-2px)}
.callout{background:var(--callout-bg);border-left:4px solid var(--callout-accent);padding:1.25rem 1.5rem;margin:1.5rem 0;border-radius:8px;box-shadow:var(--shadow)}
.callout strong{display:block;margin-bottom:.5rem;color:var(--text)}.callout p{margin:0;color:var(--muted)}
.table-container{overflow-x:auto;margin:2rem 0;border-radius:10px;border:1px solid var(--border)}table{width:100%;border-collapse:collapse;background:var(--surface)}th,td{padding:.9rem 1rem;text-align:left;border-bottom:1px solid var(--border)}th{background:var(--surface-2);font-weight:700;color:var(--text);font-size:.95rem}tr:last-child td{border-bottom:none}tr:hover{background:var(--surface-3)}
.outbound{color:var(--primary);font-weight:600}
.info-row{display:flex;gap:1rem;padding:.75rem 0;border-bottom:1px solid var(--border)}.info-row:last-child{border-bottom:none}
.info-label{font-weight:700;color:var(--muted);min-width:100px}
.note{color:#666;font-size:.9rem;margin-top:1rem}
.footer{background:var(--footer-bg);color:var(--footer-text);padding:2.5rem 0;margin-top:4rem}
.footer-wrap{display:flex;justify-content:space-between;align-items:start;gap:2rem;flex-wrap:wrap}
.footer-brand{flex:1}
.footer-logo{font-size:1.4rem;font-weight:800;color:var(--footer-strong);margin-bottom:.5rem}
.footer-tagline{color:var(--footer-muted);font-size:.95rem;margin:.5rem 0 0}
.footer-nav{display:flex;gap:1.5rem;flex-wrap:wrap}.footer-nav a{color:var(--footer-text);font-size:.95rem;transition:.2s}.footer-nav a:hover,.footer-nav a.active{color:var(--footer-strong)}
.article-header{margin-bottom:2.5rem}
.article-meta{display:flex;gap:1rem;font-size:.95rem;color:var(--muted);margin-bottom:1.5rem;flex-wrap:wrap}
.article-content{max-width:75ch;margin:0 auto}
.article-content h2{margin-top:3rem}
.article-content h3{margin-top:2rem}
.article-content p{margin-bottom:1.25rem;line-height:1.7}
.article-content ul,.article-content ol{margin:1.25rem 0 1.25rem 1.5rem;line-height:1.7}
.article-content li{margin-bottom:.5rem}
.article-content strong{color:var(--text);font-weight:600}
.toc{position:sticky;top:90px;background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:1.5rem;margin-bottom:2rem;max-height:calc(100vh - 110px);overflow-y:auto}
.toc-title{font-weight:700;font-size:1.05rem;margin-bottom:1rem;color:var(--text)}
.toc ul{list-style:none;margin:0;padding:0}
.toc li{margin-bottom:.5rem}
.toc a{color:var(--muted);font-size:.95rem;text-decoration:none;display:block;padding:.25rem 0}
.toc a:hover{color:var(--primary)}
.article-layout{display:grid;grid-template-columns:1fr 260px;gap:3rem;align-items:start}
.platform-card{background:var(--surface-2);border-left:4px solid var(--primary);padding:1.5rem;border-radius:8px;margin:1.5rem 0}
.platform-card h4{margin:0 0 .75rem;color:var(--text)}
.platform-card p{margin:0;line-height:1.6}
.comparison-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;margin:2rem 0}
.faq-item{margin-bottom:2rem}
.faq-item h3{margin-top:0;margin-bottom:.75rem;font-size:1.15rem}
.faq-item p{margin-bottom:.5rem}
@media(max-width:1024px){
.article-layout{grid-template-columns:1fr;gap:0}
.toc{position:static;max-height:none;margin-bottom:2rem}
}
@media(max-width:768px){
h1{font-size:2.25rem}.hero h1{font-size:2.5rem}.hero-lead{font-size:1.15rem}.section-title{font-size:1.75rem}.header-wrap{gap:.5rem}.nav{display:none;flex-direction:column;gap:.5rem;width:100%;padding:.5rem 0}.nav.open{display:flex}.nav a{padding:.65rem .75rem}.nav a.active,.nav a:hover{background:var(--surface-4);border-radius:8px}.nav-toggle,.theme-toggle{display:inline-flex}.info-grid{grid-template-columns:1fr}.footer-wrap{flex-direction:column;gap:1.5rem}.comparison-grid{grid-template-columns:1fr}
}
/* Cookie banner */
.cookie-banner{position:fixed;left:16px;right:16px;bottom:16px;z-index:1000;background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow-lg);border-radius:12px;padding:14px}
.cookie-row{display:flex;gap:1rem;align-items:center;justify-content:space-between;flex-wrap:wrap}
.cookie-text{color:var(--muted);font-size:.95rem;line-height:1.5;flex:1;min-width:220px}
.cookie-link{color:var(--primary);font-weight:600}
.cookie-actions{display:flex;gap:.5rem;flex-shrink:0}