:root{
  --navy:#0d1b2a;
  --navy-2:#13283d;
  --ink:#17202a;
  --muted:#5d6b7b;
  --paper:#f7f9fc;
  --white:#fff;
  --teal:#0b7874;
  --teal-dark:#075d59;
  --green:#20b85a;
  --green-dark:#118542;
  --gold:#f2b84b;
  --line:#dfe7ef;
  --soft:#e7f8f7;
  --shadow:0 18px 50px rgba(13,27,42,.10);
  --max:1120px;
  --reading:760px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--white);line-height:1.7}
img,svg{max-width:100%}
a{color:var(--teal)}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--gold);outline-offset:3px}
.skip-link{position:fixed;left:16px;top:-80px;z-index:200;background:var(--navy);color:#fff;padding:11px 15px;border-radius:10px;text-decoration:none}
.skip-link:focus{top:12px}
.container{width:min(var(--max),calc(100% - 36px));margin:auto}
.reading{width:min(var(--reading),100%);margin-inline:auto}
.topbar{background:#08131f;color:#d9e7f4;font-size:.88rem}
.topbar .container{display:flex;justify-content:center;gap:24px;padding:8px 0;flex-wrap:wrap}
header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(16px);border-bottom:1px solid rgba(223,231,239,.85)}
nav{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:74px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-weight:900;letter-spacing:-.03em;color:var(--navy)}
.brand-mark{width:42px;height:42px;border-radius:13px;background:linear-gradient(135deg,var(--teal),#38c3bd);display:grid;place-items:center;box-shadow:0 8px 20px rgba(11,120,116,.2)}
.brand-mark svg{width:26px;height:26px}
.brand span:last-child{font-size:1.25rem}
.menu{display:flex;align-items:center;gap:22px}
.menu a{text-decoration:none;font-weight:700;font-size:.94rem;color:#334155}
.menu a:hover{color:var(--teal)}
.menu a.btn,.menu a.btn:hover{color:#fff}
.mobile-toggle{display:none;background:none;border:0;font-size:1.6rem;color:var(--navy)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:49px;border:0;border-radius:12px;padding:12px 18px;font-weight:850;text-decoration:none;cursor:pointer;transition:.2s transform,.2s background,.2s box-shadow}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--green);color:#fff;box-shadow:0 10px 25px rgba(32,184,90,.2)}
.btn-primary:hover{background:var(--green-dark);color:#fff}
.btn-dark{background:var(--navy);color:#fff}
.btn-light{background:#fff;border:1px solid var(--line);color:var(--navy)}
.breadcrumb{padding:22px 0 0;font-size:.88rem;color:#64748b}
.breadcrumb a{text-decoration:none}
.breadcrumb span{padding:0 8px;color:#94a3b8}
.hero{background:radial-gradient(circle at 84% 15%,rgba(11,120,116,.16),transparent 30%),linear-gradient(180deg,#f6fbfb 0%,#fff 100%);border-bottom:1px solid var(--line);padding:54px 0 60px}
.hero-grid{display:grid;grid-template-columns:1.22fr .78fr;gap:52px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:7px;padding:6px 10px;border-radius:999px;background:var(--soft);color:var(--teal-dark);font-weight:900;font-size:.78rem;text-transform:uppercase;letter-spacing:.06em}
h1,h2,h3{line-height:1.14;color:var(--navy);letter-spacing:-.035em}
h1{font-size:clamp(2.55rem,5vw,4.45rem);margin:16px 0 20px;max-width:900px}
h2{font-size:clamp(1.75rem,3vw,2.45rem);margin:52px 0 18px}
h3{font-size:1.28rem;margin:28px 0 10px}
.lead{font-size:1.14rem;color:#526174;max-width:800px;margin:0 0 22px}
.meta{display:flex;gap:12px;align-items:center;flex-wrap:wrap;color:#64748b;font-size:.88rem}
.hero-proof{background:var(--navy);color:#fff;border-radius:26px;padding:28px;box-shadow:var(--shadow)}
.hero-proof strong{display:block;font-size:1.35rem;line-height:1.25;margin-bottom:12px}
.hero-proof p{color:#d3dee8;margin:0 0 18px}
.proof-list{display:grid;gap:10px;margin:0;padding:0;list-style:none}
.proof-list li{display:flex;gap:9px;color:#e5eef5}
.proof-list li::before{content:"✓";color:#72df9c;font-weight:900}
.index-hero{padding:70px 0 58px;background:radial-gradient(circle at 85% 10%,rgba(11,120,116,.16),transparent 31%),linear-gradient(180deg,#f7fbfd,#fff)}
.index-hero h1{max-width:820px}
.index-hero .lead{max-width:720px}
.index-main{padding:68px 0 90px;background:var(--paper)}
.post-list{display:grid;gap:28px}
.post-card{display:grid;grid-template-columns:.72fr 1.28fr;background:#fff;border:1px solid var(--line);border-radius:26px;overflow:hidden;box-shadow:var(--shadow);text-decoration:none;color:inherit}
.post-card:hover .post-link{text-decoration:underline}
.post-art{min-height:330px;background:linear-gradient(145deg,var(--navy),#17496b);display:grid;place-items:center;position:relative;overflow:hidden}
.post-art.off-art{background:linear-gradient(145deg,#075d59,#0b7874 56%,#12344d)}
.post-art::before,.post-art::after{content:"";position:absolute;border:2px solid rgba(255,255,255,.22);border-radius:50%}
.post-art::before{width:210px;height:210px}
.post-art::after{width:300px;height:300px}
.sound-mark{display:flex;align-items:center;gap:7px;z-index:1}
.sound-mark span{width:9px;border-radius:999px;background:#7be0db;box-shadow:0 0 18px rgba(123,224,219,.35)}
.sound-mark span:nth-child(1),.sound-mark span:nth-child(7){height:34px}.sound-mark span:nth-child(2),.sound-mark span:nth-child(6){height:64px}.sound-mark span:nth-child(3),.sound-mark span:nth-child(5){height:94px}.sound-mark span:nth-child(4){height:122px;background:#fff}
.post-copy{padding:38px}
.post-copy h2{font-size:clamp(1.75rem,3vw,2.7rem);margin:16px 0}
.post-copy p{color:var(--muted)}
.post-link{display:inline-block;margin-top:12px;color:var(--teal);font-weight:900}
.article-shell{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:54px;align-items:start;padding:56px 0 90px}
.article{max-width:var(--reading)}
.article p,.article li{color:#465568;font-size:1.03rem}
.article p{margin:0 0 19px}
.article ul,.article ol{padding-left:24px}
.article li{margin:8px 0}
.article strong{color:#263548}
.answer-box{border-left:5px solid var(--teal);background:#eef9f8;border-radius:0 16px 16px 0;padding:22px 24px;margin:0 0 34px}
.answer-box p{margin:0;color:#24454a;font-size:1.08rem}
.toc{background:var(--paper);border:1px solid var(--line);border-radius:18px;padding:22px 24px;margin:32px 0}
.toc strong{display:block;color:var(--navy);margin-bottom:9px}
.toc ol{margin:0;padding-left:20px}
.toc a{text-decoration:none;font-weight:700}
.comparison{width:100%;border-collapse:separate;border-spacing:0;margin:24px 0;border:1px solid var(--line);border-radius:16px;overflow:hidden}
.comparison th,.comparison td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
.comparison th{background:var(--navy);color:#fff;font-size:.9rem}
.comparison td{color:#526174}
.comparison tr:last-child td{border-bottom:0}
.checklist{display:grid;gap:12px;margin:22px 0 30px;padding:0;list-style:none!important}
.checklist li{position:relative;padding:14px 16px 14px 48px!important;margin:0!important;background:var(--paper);border:1px solid var(--line);border-radius:13px}
.checklist li::before{content:"✓";position:absolute;left:17px;top:13px;width:23px;height:23px;border-radius:50%;display:grid;place-items:center;background:var(--soft);color:var(--teal-dark);font-weight:900}
.quote{background:#fff8e7;border:1px solid #ecd89e;border-radius:17px;padding:22px 24px;margin:28px 0;color:#664d16}
.quote p{color:#664d16;margin:0}
.conversion-box{background:linear-gradient(135deg,var(--navy),#16405f);border-radius:22px;padding:28px;color:#fff;margin:38px 0}
.conversion-box h2,.conversion-box h3{color:#fff;margin:0 0 12px}
.conversion-box p{color:#d6e2ec;margin-bottom:18px}
.conversion-actions{display:flex;gap:10px;flex-wrap:wrap}
.conversion-box .btn-light{color:var(--navy)}
.voice-demo{border:1px solid var(--line);border-radius:18px;padding:20px;margin:16px 0;background:var(--paper)}
.voice-demo-head{display:flex;justify-content:space-between;gap:14px;align-items:center;margin-bottom:10px}
.voice-demo-head span{font-size:.78rem;text-transform:uppercase;letter-spacing:.05em;font-weight:900;color:var(--teal)}
.voice-demo audio{width:100%;display:block}
.price-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin:22px 0}
.price-card{border:1px solid var(--line);border-radius:17px;padding:20px;background:#fff}
.price-card span{display:block;color:var(--muted);font-size:.9rem}
.price-card strong{display:block;font-size:1.65rem;color:var(--navy);margin:3px 0}
.price-card small{color:#64748b}
.faq details{border:1px solid var(--line);border-radius:15px;margin:12px 0;padding:0 18px;background:#fff}
.faq summary{cursor:pointer;list-style:none;font-weight:850;color:var(--navy);padding:18px 2px}
.faq summary::-webkit-details-marker{display:none}
.faq details p{margin:0 2px 18px}
.sidebar{position:sticky;top:98px;display:grid;gap:18px}
.side-card{border:1px solid var(--line);border-radius:18px;padding:20px;background:var(--paper)}
.side-card h2{font-size:1.18rem;margin:0 0 9px}
.side-card p{color:var(--muted);font-size:.93rem;margin:0 0 14px}
.side-card a:not(.btn){display:block;text-decoration:none;font-weight:750;margin:8px 0}
.author{display:flex;gap:16px;align-items:flex-start;border-top:1px solid var(--line);padding-top:28px;margin-top:44px}
.author-mark{flex:0 0 48px;width:48px;height:48px;border-radius:15px;background:var(--teal);display:grid;place-items:center;color:#fff;font-weight:950}
.author h2{font-size:1.18rem;margin:0 0 5px}
.author p{font-size:.92rem;margin:0}
.related{padding:65px 0;background:var(--paper);border-top:1px solid var(--line)}
.related h2{margin:0 0 24px}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.related-card{background:#fff;border:1px solid var(--line);border-radius:17px;padding:20px;text-decoration:none;color:inherit}
.related-card strong{display:block;color:var(--navy);font-size:1.05rem;margin-bottom:6px}
.related-card span{color:var(--muted);font-size:.9rem}
footer{background:#08131f;color:#aebdca;padding:42px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.3fr repeat(3,.8fr);gap:30px}
footer h2{color:#fff;font-size:1rem;letter-spacing:0;margin:0 0 12px}
footer p{color:#aebdca}
footer a{color:#c7d4df;text-decoration:none;display:block;margin:7px 0}
footer .brand{color:#fff;margin-bottom:12px}
.copyright{border-top:1px solid rgba(255,255,255,.08);margin-top:30px;padding-top:20px;font-size:.86rem}
.mobile-conversion-bar{display:none}
@media(max-width:920px){
  .hero-grid,.article-shell{grid-template-columns:1fr}
  .sidebar{position:static;grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .menu{display:none;position:absolute;top:74px;left:0;right:0;background:#fff;padding:20px 24px;border-bottom:1px solid var(--line);flex-direction:column;align-items:flex-start}
  .menu.open{display:flex}
  .mobile-toggle{display:block}
}
@media(max-width:680px){
  body{padding-bottom:70px}
  .topbar .container{gap:8px}
  .hero,.index-hero{padding:42px 0 48px}
  h1{font-size:2.55rem}
  .post-card,.price-cards,.related-grid,.sidebar,.footer-grid{grid-template-columns:1fr}
  .post-art{min-height:220px}
  .post-copy{padding:26px}
  .article-shell{padding:38px 0 70px}
  .comparison{font-size:.9rem}
  .comparison th,.comparison td{padding:11px 10px}
  .mobile-conversion-bar{position:fixed;display:flex;left:0;right:0;bottom:0;z-index:80;padding:10px 14px;background:#fff;border-top:1px solid var(--line);box-shadow:0 -8px 24px rgba(13,27,42,.10)}
  .mobile-conversion-bar .btn{width:100%}
}