:root{
  --ink:#0a0f1e; --ink2:#0e1526; --panel:rgba(19,27,48,.72);
  --panel-brd:rgba(120,160,230,.16); --text:#e9effb; --muted:#93a2c0;
  --brand:#3b82f6; --brand2:#22d3ee; --gold:#f5b301;
  --grad:linear-gradient(120deg,#3b82f6,#22d3ee);
  --font-ui:"Inter","Segoe UI",system-ui,sans-serif;
  --font-head:"Sora","Segoe UI",system-ui,sans-serif;
  --maxw:1080px;
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  background:
    radial-gradient(60% 55% at 12% 6%,rgba(59,130,246,.22),transparent 60%),
    radial-gradient(55% 55% at 92% 12%,rgba(34,211,238,.16),transparent 60%),
    radial-gradient(70% 60% at 50% 108%,rgba(245,179,1,.10),transparent 60%),
    linear-gradient(180deg,#0a0f1e,#0b1223 55%,#0a0f1e);
  background-attachment:fixed;
  color:var(--text);font-family:var(--font-ui);line-height:1.65;
  min-height:100vh;overflow-x:hidden;
}
body::before{content:"";position:fixed;inset:0;z-index:-1;
  background-image:linear-gradient(rgba(120,180,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,180,255,.05) 1px,transparent 1px);
  background-size:34px 34px;
  -webkit-mask-image:radial-gradient(circle at 50% 20%,#000,transparent 80%);
  mask-image:radial-gradient(circle at 50% 20%,#000,transparent 80%);}
a{color:var(--brand2);text-decoration:none;transition:.2s;}
a:hover{color:var(--gold);}
h1,h2,h3{font-family:var(--font-head);letter-spacing:-.4px;line-height:1.14;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px;}

/* header */
.site-head{position:sticky;top:0;z-index:40;backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);background:rgba(10,15,30,.72);
  border-bottom:1px solid var(--panel-brd);}
.head-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 20px;
  max-width:var(--maxw);margin:0 auto;}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-head);
  font-weight:800;font-size:1.12rem;color:var(--text);white-space:nowrap;}
.brand .dot{width:26px;height:26px;border-radius:8px;background:var(--grad);flex:0 0 auto;
  box-shadow:0 6px 18px rgba(59,130,246,.45);}
.head-nav{display:flex;align-items:center;gap:6px;flex-wrap:wrap;}
.head-nav a{color:var(--muted);font-weight:600;font-size:.92rem;padding:8px 11px;border-radius:9px;}
.head-nav a:hover{color:var(--text);background:rgba(255,255,255,.06);}
.head-nav a.btn-primary,.head-nav a.btn-primary:hover{color:#fff;background:var(--grad);}
.btn{display:inline-block;padding:11px 20px;border-radius:11px;font-family:var(--font-head);
  font-weight:700;font-size:.95rem;cursor:pointer;border:none;transition:transform .18s,box-shadow .18s;}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 8px 24px rgba(59,130,246,.4);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(59,130,246,.55);color:#fff;}
.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--panel-brd);}
.btn-ghost:hover{border-color:var(--brand);color:var(--text);background:rgba(59,130,246,.10);}

/* hero */
.hero{padding:64px 0 8px;text-align:center;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.8rem;font-weight:700;
  color:var(--brand2);background:rgba(34,211,238,.09);border:1px solid rgba(34,211,238,.25);
  padding:6px 13px;border-radius:999px;margin-bottom:18px;letter-spacing:.2px;}
.hero h1{font-size:clamp(2.05rem,5.4vw,3.35rem);font-weight:800;margin-bottom:16px;}
.hero h1 .g{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;}
.hero p.sub{font-size:clamp(1rem,2.1vw,1.16rem);color:var(--muted);max-width:640px;margin:0 auto 26px;}
.cta-row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:14px;}
.trust{font-size:.86rem;color:var(--muted);}
.trust b{color:var(--text);font-weight:600;}

/* canvas illustration */
.shot{margin:34px auto 0;max-width:900px;border-radius:18px;border:1px solid var(--panel-brd);
  background:var(--panel);box-shadow:0 30px 80px rgba(0,0,0,.55);overflow:hidden;}
.shot-bar{display:flex;align-items:center;gap:7px;padding:10px 14px;border-bottom:1px solid var(--panel-brd);
  background:rgba(10,15,30,.5);}
.shot-bar i{width:10px;height:10px;border-radius:50%;background:rgba(147,162,192,.35);display:block;}
.shot-bar span{margin-left:8px;font-size:.78rem;color:var(--muted);font-family:var(--font-ui);}
.shot svg{display:block;width:100%;height:auto;}

/* sections */
.sec{padding:62px 0;}
.sec-head{text-align:center;max-width:660px;margin:0 auto 36px;}
.sec-head h2{font-size:clamp(1.55rem,3.4vw,2.05rem);font-weight:800;margin-bottom:10px;}
.sec-head p{color:var(--muted);}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px;}
.card{background:var(--panel);border:1px solid var(--panel-brd);border-radius:16px;padding:22px;
  transition:transform .18s,border-color .18s;}
.card:hover{transform:translateY(-3px);border-color:rgba(120,160,230,.34);}
.card .ic{width:40px;height:40px;border-radius:11px;display:flex;align-items:center;justify-content:center;
  font-size:1.2rem;background:linear-gradient(180deg,rgba(59,130,246,.20),rgba(34,211,238,.14));
  border:1px solid var(--panel-brd);margin-bottom:12px;}
.card h3{font-size:1.02rem;font-weight:700;margin-bottom:6px;}
.card p{color:var(--muted);font-size:.92rem;}

/* prose */
.prose{max-width:720px;margin:0 auto;}
.prose h2{font-size:clamp(1.5rem,3.2vw,1.95rem);font-weight:800;margin:0 0 14px;}
.prose h3{font-size:1.12rem;font-weight:700;margin:26px 0 8px;}
.prose p{color:var(--muted);margin-bottom:16px;}
.prose ul,.prose ol{color:var(--muted);margin:0 0 16px;padding-left:22px;}
.prose li{margin-bottom:7px;}
.prose strong{color:var(--text);}

/* steps */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;counter-reset:s;}
.step{background:var(--panel);border:1px solid var(--panel-brd);border-radius:16px;padding:22px;}
.step .n{width:30px;height:30px;border-radius:9px;background:var(--grad);color:#fff;
  font-family:var(--font-head);font-weight:800;display:flex;align-items:center;justify-content:center;
  margin-bottom:12px;font-size:.92rem;}
.step h3{font-size:1rem;margin-bottom:6px;}
.step p{color:var(--muted);font-size:.92rem;}

/* keys */
.keys{max-width:620px;margin:0 auto;background:var(--panel);border:1px solid var(--panel-brd);
  border-radius:16px;padding:8px 22px;}
.keyrow{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 0;
  border-bottom:1px solid rgba(120,160,230,.10);}
.keyrow:last-child{border-bottom:none;}
.keyrow span{color:var(--muted);font-size:.93rem;}
kbd{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.8rem;background:rgba(10,15,30,.75);
  border:1px solid var(--panel-brd);border-bottom-width:2px;border-radius:7px;padding:3px 8px;color:var(--text);
  white-space:nowrap;}

/* faq */
.faq{max-width:760px;margin:0 auto;}
.faq details{background:var(--panel);border:1px solid var(--panel-brd);border-radius:13px;
  padding:15px 19px;margin-bottom:10px;transition:border-color .18s;}
.faq details[open]{border-color:rgba(120,160,230,.34);}
.faq summary{cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;
  gap:14px;align-items:flex-start;font-size:.99rem;}
.faq summary::-webkit-details-marker{display:none;}
.faq summary::after{content:"+";color:var(--brand2);font-weight:800;flex:0 0 auto;}
.faq details[open] summary::after{content:"\2212";}
.faq details p{margin:11px 0 2px;color:var(--muted);font-size:.94rem;}

/* final cta */
.final{text-align:center;background:var(--panel);border:1px solid var(--panel-brd);border-radius:20px;
  padding:44px 26px;position:relative;overflow:hidden;}
.final::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--grad);}
.final h2{font-size:clamp(1.5rem,3.4vw,2rem);font-weight:800;margin-bottom:10px;}
.final p{color:var(--muted);max-width:520px;margin:0 auto 22px;}

/* footer */
.site-foot{border-top:1px solid var(--panel-brd);margin-top:56px;padding:26px 0 34px;
  text-align:center;color:var(--muted);font-size:.86rem;}
.foot-links{display:flex;flex-wrap:wrap;gap:8px 18px;justify-content:center;margin-bottom:12px;}
.ads-note{max-width:720px;margin:16px auto 0;font-size:.82rem;color:var(--muted);
  text-align:left;line-height:1.6;}
.ads-note summary{cursor:pointer;text-align:center;}
.ads-note p{margin-top:8px;}

@media(max-width:640px){
  .head-nav .hide-sm{display:none;}
  .hero{padding-top:44px;}
  .sec{padding:46px 0;}
  /* Keep the header on one line: the brand was wrapping to two rows and
     squeezing the CTA at 390px. */
  .head-row{padding:10px 14px;gap:10px;}
  .brand{font-size:1rem;}
  .brand .dot{width:22px;height:22px;border-radius:7px;}
  .head-nav{gap:2px;flex-wrap:nowrap;}
  .head-nav a{font-size:.86rem;padding:7px 8px;}
  .head-nav .btn-primary{padding:8px 13px !important;font-size:.86rem;}
}
@media(max-width:360px){
  .head-nav a:not(.btn-primary){display:none;}
}

/* ===== guide pages (2026-10-01) ===== */
.crumbs{font-size:.84rem;color:var(--muted);padding:22px 0 0;}
.crumbs a{color:var(--muted);} .crumbs a:hover{color:var(--text);}
.g-hero{padding:26px 0 10px;text-align:left;max-width:820px;}
.g-hero h1{font-size:clamp(1.9rem,4.6vw,2.9rem);font-weight:800;margin:10px 0 14px;}
.g-hero .lead{font-size:clamp(1rem,2vw,1.12rem);color:var(--text);opacity:.92;max-width:760px;margin-bottom:22px;}
.g-hero .cta-row{justify-content:flex-start;}
.answer{background:linear-gradient(180deg,rgba(59,130,246,.12),rgba(34,211,238,.06));border:1px solid rgba(34,211,238,.28);
  border-radius:14px;padding:16px 18px;margin:0 0 22px;color:var(--text);}
.answer b{color:var(--brand2);}
.g-body{max-width:820px;}
.g-body h2{font-size:clamp(1.4rem,3vw,1.8rem);font-weight:800;margin:44px 0 12px;}
.g-body h3{font-size:1.1rem;font-weight:700;margin:24px 0 8px;}
.g-body p{color:var(--muted);margin-bottom:15px;}
.g-body p strong,.g-body li strong{color:var(--text);}
.g-body ul,.g-body ol{color:var(--muted);margin:0 0 16px;padding-left:22px;}
.g-body li{margin-bottom:7px;}
.fig{margin:22px 0 26px;border-radius:16px;overflow:hidden;border:1px solid var(--panel-brd);background:#eef3fb;}
.fig img{display:block;width:100%;height:auto;}
.fig figcaption{background:var(--panel);color:var(--muted);font-size:.86rem;padding:10px 14px;}
.tbl{width:100%;border-collapse:collapse;margin:8px 0 22px;font-size:.93rem;}
.tbl th,.tbl td{border-bottom:1px solid var(--panel-brd);padding:10px 8px;text-align:left;vertical-align:top;}
.tbl th{color:var(--text);font-family:var(--font-head);font-size:.9rem;}
.tbl td{color:var(--muted);}
.tbl-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;}
.note{border-left:3px solid var(--gold);background:rgba(245,179,1,.07);padding:12px 16px;border-radius:0 12px 12px 0;
  color:var(--muted);margin:0 0 18px;font-size:.94rem;}
.tpl-cta{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin:6px 0 24px;}
.related{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin-top:14px;}
.related a{display:block;background:var(--panel);border:1px solid var(--panel-brd);border-radius:13px;padding:14px 16px;color:var(--text);font-weight:600;}
.related a span{display:block;color:var(--muted);font-weight:400;font-size:.86rem;margin-top:3px;}
.related a:hover{border-color:rgba(120,160,230,.4);color:var(--text);}
.foot-guides{display:flex;flex-wrap:wrap;gap:6px 16px;justify-content:center;margin:0 0 12px;font-size:.84rem;}
.foot-guides b{color:var(--text);font-weight:600;}
@media(max-width:640px){ .g-hero{padding-top:18px;} .g-body h2{margin-top:34px;} }