*{margin:0;padding:0;box-sizing:border-box}
:root{
  --blue:#1877F2;--blue-dk:#0F5FCC;--blue-lt:#E8F1FE;--blue-md:#D0E4FD;
  --cyan:#17C3F2;--ink:#0F1A2E;--ink-2:#1A2540;
  --text:#374151;--text-mid:#6B7280;--text-soft:#9CA3AF;
  --bg:#FFFFFF;--bg-2:#F5F8FF;--bg-warm:#FAFBFC;
  --border:#DCE8FB;--border-soft:#F3F4F6;
  --green:#10B981;--wa:#25D366;--gold:#F59E0B;
  --shadow:0 4px 12px rgba(15,26,46,.06);--shadow-md:0 12px 32px rgba(15,26,46,.08);--shadow-blue:0 8px 24px rgba(24,119,242,.22);
  --font:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;
  --max:780px;--pad:max(1.25rem,4vw);
  --ease:cubic-bezier(.16,1,.3,1);--ease-quick:cubic-bezier(.4,0,.2,1);
}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font);background:var(--bg);color:var(--ink);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
::selection{background:var(--blue);color:#fff}
a{color:var(--blue);text-decoration:none;font-weight:500}
a:hover{color:var(--blue-dk)}

.topbar{background:var(--ink);color:#fff;padding:.5rem var(--pad);font-size:.75rem;text-align:center}
.topbar strong{font-weight:600}.topbar a{color:var(--cyan);font-weight:500}

nav{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border-soft);padding:.85rem var(--pad)}
.nav-inner{max-width:1240px;margin:0 auto;display:flex;justify-content:space-between;align-items:center}
.logo{display:inline-flex;align-items:center;gap:.6rem;font-weight:700;font-size:1.1rem;letter-spacing:-.025em;color:var(--ink)}
.logo-mark{width:32px;height:32px;background:linear-gradient(135deg,var(--cyan),var(--blue));border-radius:9px;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 8px rgba(24,119,242,.25)}
.logo-mark svg{width:17px;height:17px;color:#fff}
.logo-text{display:flex;flex-direction:column;line-height:1}.logo-text .name{font-weight:700}.logo-text .tag{font-size:.64rem;color:var(--text-soft);font-weight:500;margin-top:1px}
.nav-back{display:inline-flex;align-items:center;gap:.45rem;padding:.6rem 1.1rem;background:var(--bg-2);border:1px solid var(--border);color:var(--ink);font-size:.85rem;font-weight:600;border-radius:10px;transition:all .25s ease}
.nav-back:hover{background:var(--blue);color:#fff;border-color:var(--blue)}.nav-back svg{width:14px;height:14px}

.article-header{background:linear-gradient(180deg,var(--bg-2) 0%,transparent 100%);padding:3.5rem var(--pad) 2.5rem;border-bottom:1px solid var(--border-soft)}
.article-header-inner{max-width:var(--max);margin:0 auto}
.article-breadcrumb{font-size:.78rem;color:var(--text-mid);margin-bottom:1.2rem}
.article-breadcrumb a{color:var(--text-mid);font-weight:500}.article-breadcrumb a:hover{color:var(--blue)}
.article-breadcrumb span{color:var(--text-soft);margin:0 .4rem}
.article-category{display:inline-block;padding:.35rem .85rem;background:var(--blue-lt);color:var(--blue);font-size:.72rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;border-radius:100px;margin-bottom:1.2rem}
h1{font-size:clamp(1.7rem,4vw,2.6rem);font-weight:800;color:var(--ink);letter-spacing:-.035em;line-height:1.15;margin-bottom:1rem}
.article-meta{display:flex;gap:1.2rem;flex-wrap:wrap;font-size:.85rem;color:var(--text-mid);align-items:center}
.article-meta-item{display:inline-flex;align-items:center;gap:.4rem}
.article-meta-item svg{width:13px;height:13px;color:var(--text-soft)}

.article-content{max-width:var(--max);margin:0 auto;padding:3rem var(--pad)}
.article-content p{font-size:1.05rem;color:var(--text);line-height:1.8;margin-bottom:1.3rem}
.article-content p strong{color:var(--ink);font-weight:600}
.article-content h2{font-size:clamp(1.4rem,2.5vw,1.8rem);font-weight:800;color:var(--ink);letter-spacing:-.025em;margin:3rem 0 1.2rem;line-height:1.2}
.article-content h3{font-size:1.2rem;font-weight:700;color:var(--ink);letter-spacing:-.015em;margin:2rem 0 .8rem}
.article-content ul, .article-content ol{margin:1rem 0 1.5rem;padding-left:1.6rem}
.article-content ul li, .article-content ol li{margin-bottom:.6rem;line-height:1.7;color:var(--text);font-size:1.02rem}
.article-content ul li::marker{color:var(--blue)}
.article-content blockquote{margin:2rem 0;padding:1.5rem 1.8rem;background:var(--bg-2);border-left:4px solid var(--blue);border-radius:0 12px 12px 0;font-size:1.05rem;color:var(--ink);font-style:italic;line-height:1.7}
.article-content blockquote p{margin-bottom:.5rem}
.article-content blockquote cite{display:block;margin-top:.8rem;font-style:normal;font-size:.85rem;color:var(--text-mid);font-weight:600}

.callout{background:linear-gradient(135deg,var(--bg-2),var(--blue-lt));border:1px solid var(--border);border-radius:16px;padding:1.5rem 1.8rem;margin:2rem 0}
.callout-icon{width:36px;height:36px;background:linear-gradient(135deg,var(--cyan),var(--blue));border-radius:10px;display:flex;align-items:center;justify-content:center;margin-bottom:.8rem}
.callout-icon svg{width:18px;height:18px;color:#fff}
.callout-title{font-size:1.05rem;font-weight:700;color:var(--ink);margin-bottom:.5rem;letter-spacing:-.015em}
.callout p{margin-bottom:.6rem;font-size:.98rem}
.callout p:last-child{margin-bottom:0}

.example-box{background:#fff;border:1.5px solid var(--blue);border-radius:16px;padding:1.5rem 1.8rem;margin:2rem 0;box-shadow:var(--shadow)}
.example-box-label{display:inline-block;font-size:.7rem;font-weight:700;color:var(--blue);letter-spacing:.08em;text-transform:uppercase;background:var(--blue-lt);padding:.25rem .7rem;border-radius:100px;margin-bottom:.8rem}
.example-box h4{font-size:1.05rem;font-weight:700;color:var(--ink);margin-bottom:.6rem;letter-spacing:-.015em}
.example-box p{font-size:.95rem;margin-bottom:.6rem}
.example-box p:last-child{margin-bottom:0}
.example-box .highlight{display:inline-block;background:var(--blue);color:#fff;padding:.05em .35em;border-radius:6px;font-weight:600}

.cta-banner{background:linear-gradient(135deg,var(--ink) 0%,var(--ink-2) 100%);color:#fff;border-radius:20px;padding:2.5rem 2rem;text-align:center;margin:3.5rem 0;position:relative;overflow:hidden}
.cta-banner::before{content:'';position:absolute;top:-80px;right:-50px;width:280px;height:280px;background:radial-gradient(circle,rgba(24,119,242,.25),transparent 65%);pointer-events:none}
.cta-banner-inner{position:relative;z-index:1}
.cta-banner h3{font-size:1.4rem;font-weight:800;color:#fff;margin-bottom:.6rem;letter-spacing:-.025em}
.cta-banner h3 .mark{background:var(--blue);padding:.05em .3em;border-radius:6px}
.cta-banner p{color:rgba(255,255,255,.85);margin-bottom:1.5rem;font-size:.95rem;line-height:1.5}
.cta-buttons{display:flex;gap:.6rem;justify-content:center;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;font-family:var(--font);font-weight:600;border:none;text-decoration:none;transition:all .3s var(--ease-quick);cursor:pointer;padding:.9rem 1.4rem;font-size:.92rem;border-radius:12px;white-space:nowrap;color:#fff !important}
.btn-blue{background:linear-gradient(135deg,var(--cyan) 0%,var(--blue) 50%,var(--blue-dk) 100%);box-shadow:var(--shadow-blue)}
.btn-blue:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(24,119,242,.32)}
.btn-wa{background:var(--wa)}.btn-wa:hover{transform:translateY(-2px)}.btn-wa svg{width:16px;height:16px}
@media(max-width:480px){.cta-banner{padding:2rem 1.5rem}.cta-buttons{flex-direction:column;width:100%}.cta-buttons .btn{width:100%}}

.article-footer{padding:2.5rem 0;border-top:1px solid var(--border-soft);margin-top:3rem}
.article-tags{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:1.5rem}
.article-tag{padding:.35rem .8rem;background:var(--bg-2);color:var(--text-mid);font-size:.75rem;font-weight:500;border-radius:100px}

.related-articles{margin-top:3rem}
.related-articles h3{font-size:1.2rem;font-weight:700;margin-bottom:1.2rem;letter-spacing:-.02em}
.related-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1rem}
.related-item{background:#fff;border:1px solid var(--border-soft);border-radius:12px;padding:1.2rem;transition:all .25s var(--ease);text-decoration:none;color:var(--ink) !important}
.related-item:hover{border-color:var(--blue-md);box-shadow:var(--shadow)}
.related-item-cat{font-size:.7rem;font-weight:700;color:var(--blue);letter-spacing:.05em;text-transform:uppercase;margin-bottom:.4rem;display:block}
.related-item-title{font-size:.95rem;font-weight:600;color:var(--ink);line-height:1.35}

footer{background:#080F1E;color:rgba(255,255,255,.6);padding:2.5rem var(--pad) 1.8rem;margin-top:4rem}
.footer-inner{max-width:1240px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1.2rem}
.footer-left .logo{color:#fff}.footer-left .logo-text .tag{color:rgba(255,255,255,.5)}
.footer-links{display:flex;gap:1.3rem;font-size:.82rem;flex-wrap:wrap;justify-content:center}
.footer-links a{color:rgba(255,255,255,.65);font-weight:400}.footer-links a:hover{color:#fff}
.footer-copy{font-size:.75rem;color:rgba(255,255,255,.5);width:100%;text-align:center;margin-top:.8rem;padding-top:.8rem;border-top:1px solid rgba(255,255,255,.08)}
@media(max-width:600px){.footer-inner{flex-direction:column;text-align:center;gap:1rem}}

.float-contacts{position:fixed;bottom:max(1rem,env(safe-area-inset-bottom,1rem));right:1rem;z-index:90;display:flex;flex-direction:column;gap:.55rem}
.float-btn{width:50px;height:50px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff !important;transition:all .3s var(--ease-quick);box-shadow:0 8px 24px rgba(15,26,46,.18);position:relative}
.float-btn:hover{transform:translateY(-3px) scale(1.05)}.float-btn svg{width:22px;height:22px}
.float-call{background:linear-gradient(135deg,var(--cyan),var(--blue),var(--blue-dk))}
.float-wa{background:var(--wa)}.float-wa::before{content:'';position:absolute;inset:-3px;border-radius:50%;background:var(--wa);opacity:.35;animation:waPulse 2.6s ease-in-out infinite;z-index:-1}
@keyframes waPulse{0%,100%{transform:scale(1);opacity:.35}50%{transform:scale(1.45);opacity:0}}