:root{
  --brand:#304ac1;
  --brand-2:#5c74e2;
  --accent:#677ee6;
  --brand-ink:#1a2431;
  --bg:#f4f6fb;
  --surface:#ffffff;
  --surface-2:#eef1f9;
  --text:#1a2128;
  --muted:#64707e;
  --border:#e2e7f0;
  --grad:linear-gradient(135deg,#304ac1 0%,#5c74e2 55%,#7087f2 100%);
  --radius-1:10px;
  --radius-2:16px;
  --radius-3:22px;
  --shadow-1:0 2px 10px rgba(30,45,90,.06);
  --shadow-2:0 12px 34px -12px rgba(30,45,90,.22);
  --shadow-3:0 26px 60px -22px rgba(30,45,90,.32);
  --container:1180px;
  --font:'Inter','Segoe UI',system-ui,-apple-system,Roboto,'Helvetica Neue',Arial,sans-serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 22px}

/* ---------- HEADER ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.82);
  backdrop-filter:saturate(160%) blur(14px);
  border-bottom:1px solid var(--border);
}
.hdr-inner{display:flex;align-items:center;gap:22px;height:66px}
.brand{font-weight:800;font-size:1.32rem;letter-spacing:-.02em;color:var(--brand-ink)}
.brand span{color:var(--brand)}
.hdr-nav{display:flex;gap:26px;margin-left:14px}
.hdr-nav a{color:var(--muted);font-weight:600;font-size:.95rem;transition:color .18s}
.hdr-nav a:hover{color:var(--brand)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--grad);color:#fff;font-weight:700;
  padding:12px 22px;border-radius:9999px;border:0;cursor:pointer;
  box-shadow:0 8px 20px -8px rgba(48,74,193,.7);
  transition:transform .18s ease,box-shadow .18s ease;font-size:.95rem;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 14px 28px -10px rgba(48,74,193,.75)}
.btn-sm{padding:9px 18px;font-size:.9rem;margin-left:auto}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.burger span{width:24px;height:2px;background:var(--brand-ink);border-radius:2px;transition:.2s}
.mobile-nav{display:none;flex-direction:column;padding:10px 22px 18px;border-top:1px solid var(--border);background:#fff}
.mobile-nav a{padding:11px 0;color:var(--brand-ink);font-weight:600;border-bottom:1px solid var(--surface-2)}
.mobile-nav.open{display:flex}

/* ---------- ART HERO ---------- */
.art-hero{
  position:relative;overflow:hidden;
  background:var(--grad);color:#fff;
  padding:46px 0 60px;
}
.art-hero::before,.art-hero::after{
  content:"";position:absolute;border-radius:50%;pointer-events:none;
}
.art-hero::before{width:520px;height:520px;right:-140px;top:-200px;background:radial-gradient(circle,rgba(255,255,255,.16),transparent 70%)}
.art-hero::after{width:360px;height:360px;left:-120px;bottom:-180px;border:2px solid rgba(255,255,255,.14)}
.art-hero-inner{position:relative;z-index:1}
.crumbs{font-size:.85rem;color:rgba(255,255,255,.78);margin-bottom:20px;display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.crumbs a{color:rgba(255,255,255,.92)}
.crumbs a:hover{text-decoration:underline}
.tag-row{display:flex;flex-wrap:wrap;gap:9px;margin-bottom:18px}
.art-hero .tag{background:rgba(255,255,255,.16);color:#fff;border:1px solid rgba(255,255,255,.22)}
.tag{display:inline-block;font-size:.78rem;font-weight:700;padding:5px 13px;border-radius:9999px;background:var(--surface-2);color:var(--brand);letter-spacing:.01em}
.art-hero h1{
  font-size:clamp(2rem,4.6vw,3.4rem);line-height:1.08;font-weight:800;
  letter-spacing:-.025em;margin:0 0 18px;max-width:960px;
}
.lead{font-size:clamp(1.05rem,1.8vw,1.32rem);color:rgba(255,255,255,.9);max-width:760px;margin:0 0 26px;line-height:1.5}
.meta{display:flex;flex-wrap:wrap;gap:22px}
.meta-item{display:flex;align-items:center;gap:8px;font-size:.92rem;color:rgba(255,255,255,.86);font-weight:500}
.ic{width:19px;height:19px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}

/* ---------- LAYOUT ---------- */
.art-body{padding:44px 22px 70px}
.art-layout{display:grid;grid-template-columns:262px 1fr;gap:44px;align-items:start}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-2);box-shadow:var(--shadow-1)}

/* ---------- TOC ---------- */
.toc-wrap{position:sticky;top:86px}
.toc{padding:22px 20px}
.toc-title{font-size:.82rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:0 0 14px}
.toc-list{list-style:none;margin:0;padding:0;counter-reset:none}
.toc-list li{margin:0}
.toc-list a{display:flex;align-items:flex-start;gap:11px;padding:8px 0;color:var(--brand-ink);font-size:.93rem;font-weight:500;transition:color .16s}
.toc-list a:hover{color:var(--brand)}
.toc-num{flex-shrink:0;width:22px;height:22px;border-radius:7px;background:var(--surface-2);color:var(--brand);font-size:.78rem;font-weight:800;display:flex;align-items:center;justify-content:center}

/* ---------- CONTENT ---------- */
.art-content{min-width:0;max-width:800px}
.art-content section{margin-bottom:48px;scroll-margin-top:86px}
.art-content h2{
  font-size:clamp(1.5rem,2.6vw,2rem);font-weight:800;letter-spacing:-.02em;
  line-height:1.2;margin:0 0 18px;color:var(--brand-ink);position:relative;padding-left:16px;
}
.art-content h2::before{content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:5px;border-radius:4px;background:var(--grad)}
.art-content h3{font-size:1.16rem;font-weight:700;margin:0 0 8px;color:var(--brand-ink)}
.art-content p{margin:0 0 15px;color:#33404d}
.art-content b{color:var(--brand-ink)}

.hero-figure{position:relative;border-radius:var(--radius-3);overflow:hidden;margin-bottom:44px;box-shadow:var(--shadow-2);aspect-ratio:16/8;background:var(--surface-2)}
.hero-figure img{width:100%;height:100%;object-fit:cover}
.fig-cap{position:absolute;right:12px;bottom:10px;font-size:.72rem;color:#fff;background:rgba(26,33,40,.55);padding:4px 10px;border-radius:9999px;backdrop-filter:blur(4px)}

.ticks{list-style:none;margin:0 0 15px;padding:0;display:grid;gap:10px}
.ticks li{position:relative;padding-left:32px;color:#33404d}
.ticks li::before{
  content:"";position:absolute;left:0;top:2px;width:20px;height:20px;border-radius:6px;
  background:var(--surface-2);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23304ac1' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E");
  background-size:13px;background-repeat:no-repeat;background-position:center;
}

/* feature grid */
.feature-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:8px}
.feature{padding:22px 20px;position:relative;transition:transform .2s ease,box-shadow .2s ease}
.feature:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.feature-num{position:absolute;top:16px;right:18px;font-size:1.6rem;font-weight:800;color:var(--surface-2)}
.feature h3{font-size:1.02rem;margin-bottom:6px}
.feature p{font-size:.92rem;margin:0;color:var(--muted)}

/* price cards */
.price-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:14px 0 12px}
.price-card{padding:24px 18px;text-align:center;transition:transform .2s ease,box-shadow .2s ease}
.price-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.price-card.featured{background:var(--grad);border-color:transparent;box-shadow:var(--shadow-2)}
.price-card.featured .pc-label,.price-card.featured .pc-per{color:rgba(255,255,255,.85)}
.price-card.featured .pc-val{color:#fff}
.pc-label{display:block;font-size:.82rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);margin-bottom:10px}
.pc-val{display:block;font-size:1.32rem;font-weight:800;color:var(--brand);letter-spacing:-.01em}
.pc-per{display:block;font-size:.82rem;color:var(--muted);margin-top:4px}
.note{font-size:.88rem;color:var(--muted);font-style:italic}

/* choose */
.choose-block{background:var(--surface);border:1px solid var(--border);border-left:4px solid var(--brand);border-radius:var(--radius-1);padding:20px 22px;margin-bottom:16px;box-shadow:var(--shadow-1)}
.choose-block h3{display:flex;flex-wrap:wrap;align-items:baseline;gap:10px}
.ch-sub{font-size:.82rem;font-weight:600;color:var(--brand);background:var(--surface-2);padding:3px 10px;border-radius:9999px}
.choose-block p{font-size:.95rem}
.picks{margin-bottom:0!important}

/* rank cards */
.rank-list{display:grid;gap:18px}
.rank{padding:24px 24px 22px;transition:transform .2s ease,box-shadow .2s ease}
.rank:hover{transform:translateY(-4px);box-shadow:var(--shadow-3)}
.rank-head{display:flex;align-items:center;gap:16px;margin-bottom:12px}
.rank-badge{
  flex-shrink:0;width:48px;height:48px;border-radius:14px;background:var(--grad);color:#fff;
  font-weight:800;font-size:1.05rem;display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 18px -8px rgba(48,74,193,.6);
}
.rank-title{flex:1;min-width:0}
.rank-title h3{font-size:1.22rem;margin:0}
.rank-fit{font-size:.85rem;color:var(--muted)}
.rank-price{flex-shrink:0;font-weight:800;color:var(--brand);font-size:1rem;background:var(--surface-2);padding:7px 14px;border-radius:9999px;white-space:nowrap}
.rank-desc{color:#33404d;margin-bottom:16px}
.pc-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.pc h4{font-size:.82rem;text-transform:uppercase;letter-spacing:.05em;margin:0 0 10px}
.pc-pros h4{color:#1e9e5a}
.pc-cons h4{color:#d1573e}
.pc ul{list-style:none;margin:0;padding:0;display:grid;gap:7px}
.pc li{position:relative;padding-left:22px;font-size:.9rem;color:#33404d;line-height:1.4}
.pc-pros li::before{content:"+";position:absolute;left:0;top:0;color:#1e9e5a;font-weight:800}
.pc-cons li::before{content:"–";position:absolute;left:0;top:0;color:#d1573e;font-weight:800}

/* table */
.table-scroll{overflow-x:auto;border-radius:var(--radius-2);border:1px solid var(--border);box-shadow:var(--shadow-1);-webkit-overflow-scrolling:touch}
.cmp{width:100%;border-collapse:collapse;min-width:720px;background:var(--surface)}
.cmp thead th{background:var(--brand-ink);color:#fff;font-size:.82rem;text-transform:uppercase;letter-spacing:.04em;padding:14px 16px;text-align:left;font-weight:700}
.cmp td{padding:14px 16px;border-top:1px solid var(--border);font-size:.92rem;color:#33404d;vertical-align:top}
.cmp tbody tr:nth-child(even){background:var(--surface-2)}
.cmp tbody tr:hover{background:#e8ecf9}
.cmp-name{font-weight:800;color:var(--brand-ink);white-space:nowrap}
.cmp-price{font-weight:800;color:var(--brand);white-space:nowrap}

/* steps */
.steps{list-style:none;counter-reset:st;margin:0;padding:0;display:grid;gap:14px}
.steps li{counter-increment:st;position:relative;padding:18px 20px 18px 66px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-1);box-shadow:var(--shadow-1)}
.steps li::before{
  content:counter(st);position:absolute;left:18px;top:18px;width:34px;height:34px;border-radius:10px;
  background:var(--surface-2);color:var(--brand);font-weight:800;display:flex;align-items:center;justify-content:center;
}
.steps h3{font-size:1.05rem;margin-bottom:5px}
.steps p{margin:0;font-size:.92rem;color:var(--muted)}

.callout{background:var(--surface-2);border-radius:var(--radius-2);padding:20px 24px;margin-bottom:18px;border-left:4px solid var(--brand)}
.callout p{margin:0;font-size:1.02rem;color:var(--brand-ink)}

/* CTA */
.cta{border-radius:var(--radius-3);overflow:hidden;background:var(--grad);color:#fff;box-shadow:var(--shadow-3);position:relative}
.cta::before{content:"";position:absolute;width:340px;height:340px;border:2px solid rgba(255,255,255,.14);border-radius:50%;right:-100px;top:-140px}
.cta-inner{position:relative;padding:38px 34px}
.cta h2{color:#fff;padding-left:0;margin-bottom:10px}
.cta h2::before{display:none}
.cta p{color:rgba(255,255,255,.9);max-width:620px}
.cta-form{display:grid;grid-template-columns:1fr 1fr auto;gap:12px;margin:22px 0 6px}
.cta-form input{
  padding:13px 16px;border-radius:9999px;border:1px solid rgba(255,255,255,.4);
  background:rgba(255,255,255,.14);color:#fff;font-size:.95rem;font-family:inherit;
}
.cta-form input::placeholder{color:rgba(255,255,255,.72)}
.cta-form input:focus{outline:none;background:#fff;color:var(--brand-ink);border-color:#fff}
.cta-form input:focus::placeholder{color:var(--muted)}
.btn-cta{background:#fff;color:var(--brand);box-shadow:0 8px 20px -8px rgba(0,0,0,.35)}
.btn-cta:hover{background:#f4f6fb}
.cta-ok{background:rgba(255,255,255,.18);border-radius:var(--radius-1);padding:10px 16px;display:inline-block;margin-top:8px}
.cta-links{display:flex;flex-wrap:wrap;gap:20px;margin-top:20px;padding-top:18px;border-top:1px solid rgba(255,255,255,.2)}
.cta-links a{color:#fff;font-weight:600;font-size:.92rem;border-bottom:1px solid rgba(255,255,255,.4);padding-bottom:1px}

/* FAQ */
.faq{display:grid;gap:12px}
.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-1);box-shadow:var(--shadow-1);overflow:hidden}
.faq-item summary{list-style:none;cursor:pointer;padding:17px 22px;font-weight:700;color:var(--brand-ink);display:flex;justify-content:space-between;align-items:center;gap:14px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-ic{position:relative;flex-shrink:0;width:18px;height:18px}
.faq-ic::before,.faq-ic::after{content:"";position:absolute;background:var(--brand);border-radius:2px;transition:.22s}
.faq-ic::before{left:0;top:8px;width:18px;height:2px}
.faq-ic::after{left:8px;top:0;width:2px;height:18px}
.faq-item[open] .faq-ic::after{transform:rotate(90deg);opacity:0}
.faq-a{padding:0 22px 18px}
.faq-a p{margin:0;color:#33404d}

/* article foot */
.art-foot{margin-top:20px}
.author-card{display:flex;align-items:center;gap:14px;padding:16px 20px;margin-top:16px}
.author-ava{width:48px;height:48px;border-radius:50%;background:var(--grad);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.author-name{display:block;font-weight:800;color:var(--brand-ink)}
.author-role{display:block;font-size:.85rem;color:var(--muted)}

/* footer */
.site-footer{background:var(--brand-ink);color:#c8d0dc;margin-top:20px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:30px;padding:48px 22px 30px}
.brand-foot{color:#fff}
.brand-foot span{color:var(--brand-2)}
.footer-about{font-size:.9rem;color:#94a1b3;max-width:280px;margin-top:12px}
.footer-col h4{color:#fff;font-size:.95rem;margin:0 0 14px}
.footer-col a{display:block;color:#adb8c7;font-size:.9rem;padding:5px 0;transition:color .16s}
.footer-col a:hover{color:#fff}
.socials{display:flex;gap:9px;margin-top:12px}
.soc{display:flex!important;align-items:center;justify-content:center;width:38px;height:38px;border-radius:10px;background:rgba(255,255,255,.08);color:#fff!important;font-size:.78rem;font-weight:700;padding:0!important}
.soc:hover{background:var(--brand)}
.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;padding:18px 22px;border-top:1px solid rgba(255,255,255,.1);font-size:.85rem;color:#8a96a8}
.footer-bottom a{color:#adb8c7}

/* reveal */
html.js .reveal{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease}
html.js .reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html.js .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* responsive */
@media(max-width:960px){
  .art-layout{grid-template-columns:1fr;gap:26px}
  .toc-wrap{position:static}
  .toc{padding:18px 18px}
  .toc-list{columns:2;column-gap:20px}
  .hdr-nav{display:none}
  .btn-sm{display:none}
  .burger{display:flex;margin-left:auto}
}
@media(max-width:640px){
  .feature-grid,.price-cards,.pc-grid,.cta-form{grid-template-columns:1fr}
  .toc-list{columns:1}
  .rank-head{flex-wrap:wrap}
  .rank-price{margin-left:60px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .cta-inner{padding:28px 22px}
  .art-body{padding:30px 16px 50px}
}