:root{--bg:#fff;--surface:#f6f7f9;--text:#18202a;--muted:#667085;--border:#e5e7eb;--accent:#2563eb;--shadow:0 12px 35px rgba(15,23,42,.08);--radius:18px;--max:1180px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui,-apple-system,"Segoe UI",Arial,sans-serif;line-height:1.75}a{color:inherit;text-decoration:none}img{display:block;max-width:100%}.container{width:min(calc(100% - 32px),var(--max));margin:auto}.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}.nav{height:72px;display:flex;align-items:center;justify-content:space-between}.brand{font-size:1.25rem;font-weight:850}.nav-links{display:flex;gap:20px;align-items:center;font-weight:650}.menu-btn{display:none}.btn{border:0;border-radius:10px;padding:10px 15px;background:var(--text);color:#fff;font-weight:750;cursor:pointer}.secondary{background:#eef2f6;color:var(--text)}.hero{padding:82px 0 58px;background:linear-gradient(180deg,#f8fbff,#fff)}.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:50px;align-items:center}.eyebrow{font-size:.78rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}h1,h2,h3{line-height:1.2;letter-spacing:-.035em}h1{font-size:clamp(2.4rem,6vw,4.8rem);margin:12px 0 20px}h2{font-size:clamp(1.65rem,3vw,2.25rem)}.lead{font-size:1.16rem;color:#475467}.hero-card{border-radius:24px;overflow:hidden;box-shadow:var(--shadow)}.hero-card img{height:360px;width:100%;object-fit:cover}.section,.page{padding:64px 0}.section-head{margin-bottom:26px}.section-head p,.muted,.excerpt{color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.card{border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:#fff;transition:.2s;box-shadow:0 2px 10px rgba(15,23,42,.03)}.card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}.card img{height:210px;width:100%;object-fit:cover}.card-body{padding:20px}.meta{font-size:.83rem;color:var(--muted);display:flex;gap:9px;flex-wrap:wrap}.tag,.pill{display:inline-flex;background:#eef4ff;color:#2456b8;border-radius:999px;padding:4px 9px;font-weight:750}.ad{border:1px dashed #cbd5e1;background:#f8fafc;min-height:120px;display:grid;place-items:center;color:#94a3b8;margin:28px 0;border-radius:12px}.ad.large{min-height:250px}.page-narrow{max-width:820px}.article-header{max-width:900px;margin:auto}.article-header h1{font-size:clamp(2.2rem,5vw,4rem)}.article-cover{margin-top:30px;border-radius:22px;overflow:hidden}.article-cover img{width:100%;max-height:560px;object-fit:cover}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:44px;margin-top:38px}.article-content{font-size:1.08rem}.article-content h2{margin-top:42px}.toc{position:sticky;top:95px;height:max-content;border:1px solid var(--border);border-radius:14px;padding:18px;background:var(--surface)}.toc a{display:block;color:var(--muted);padding:5px 0}.author{display:flex;gap:14px;align-items:center;border-top:1px solid var(--border);margin-top:45px;padding-top:22px}.avatar{width:46px;height:46px;border-radius:50%;display:grid;place-items:center;background:#e2e8f0;font-weight:800}.share{display:flex;gap:10px;margin-top:24px}.form{display:grid;gap:16px}.field{display:grid;gap:7px}.field label{font-weight:700}.field input,.field textarea,.search{width:100%;padding:12px 13px;border:1px solid #d0d5dd;border-radius:10px;font:inherit}.field textarea{min-height:160px}.error{display:none;color:#b42318;font-size:.85rem}.invalid .error{display:block}.invalid input,.invalid textarea{border-color:#d92d20}.status{display:none;padding:12px;border-radius:10px;background:#ecfdf3;color:#027a48}.footer{border-top:1px solid var(--border);padding:34px 0;color:var(--muted)}.footer-grid{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}.footer a{margin-right:16px}.search-wrap{display:flex;gap:10px;max-width:520px}.category-pills{display:flex;gap:10px;flex-wrap:wrap;margin:20px 0}.pill{border:1px solid var(--border);background:transparent;color:#475467}.pill.active,.pill:hover{background:#111827;color:#fff}.notice{padding:18px;border-left:4px solid var(--accent);background:#f8fafc}.hidden{display:none!important}.dark{--bg:#0b1220;--surface:#111827;--text:#f8fafc;--muted:#aab4c3;--border:#263244}.dark .site-header,.dark .nav-links,.dark .card,.dark .hero-card,.dark .field input,.dark .field textarea{background:#0f172a;color:var(--text)}.dark .hero{background:#0f172a}.dark .lead,.dark .excerpt{color:#aab4c3}.dark .ad,.dark .notice{background:#111827}.dark .secondary{background:#1e293b;color:#fff}@media(max-width:900px){.hero-grid,.article-layout{grid-template-columns:1fr}.grid{grid-template-columns:repeat(2,1fr)}.toc{position:static}}@media(max-width:700px){.container{width:calc(100% - 24px)}.menu-btn{display:block;border:1px solid var(--border);background:#fff;border-radius:10px;padding:8px 11px}.nav-links{display:none;position:absolute;left:12px;right:12px;top:70px;background:#fff;border:1px solid var(--border);border-radius:14px;padding:12px;flex-direction:column;align-items:stretch}.nav-links.open{display:flex}.grid{grid-template-columns:1fr}.hero{padding:55px 0 40px}.hero-card img{height:280px}.search-wrap{flex-direction:column}}