:root {
      --black:#0d0d0f; --black-2:#18181b; --blue:#2563eb; --blue-dark:#1746ad;
      --blue-soft:#eff6ff; --blue-pale:#f7f9ff; --white:#fff; --surface:#f4f6fa;
      --ink:#121317; --muted:#626876; --line:#d8dee9; --green:#eaf8f1;
      --yellow:#fff7da; --purple:#f2efff; --orange:#fff0e7; --pink:#fff0f5;
      --shadow:0 16px 44px rgba(24,35,58,.09);
    }
    *{box-sizing:border-box} html{scroll-behavior:smooth} body{margin:0;color:var(--ink);background:var(--surface);font:17px/1.58 Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
    a{color:inherit} button,input{font:inherit} button{cursor:pointer}
    .topbar{min-height:60px;display:flex;align-items:center;gap:12px;padding:9px 24px;position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
    .all-features{display:inline-flex;align-items:center;gap:7px;padding:7px 12px;border:1px solid var(--line);border-radius:999px;background:var(--white);text-decoration:none;font-size:14px;font-weight:850}
    .all-features:hover{border-color:#9db6ea}.crumb{font-size:15px;font-weight:800}.top-chip{margin-left:auto;padding:5px 9px;border-radius:999px;background:var(--black);color:#fff;font-size:10.5px;font-weight:900;letter-spacing:.1em;text-transform:uppercase}
    .layout{min-height:calc(100vh - 60px);display:grid;grid-template-columns:262px minmax(0,1fr)}
    aside{position:sticky;top:60px;height:calc(100vh - 60px);overflow-y:auto;padding:24px 18px 34px;background:var(--black);color:#f7f7f8;border-right:1px solid #242429}
    .brand{display:flex;align-items:center;gap:11px;margin-bottom:4px;font-size:21px;font-weight:850}.brand-mark{width:35px;height:35px;display:grid;place-items:center;border-radius:50%;background:#fff;color:#111;font-size:17px}.guide-subtitle{margin:0 0 24px 46px;color:#a9abb3;font-size:12.5px;line-height:1.4}
    .nav-label{margin:19px 10px 7px;color:#777b86;font-size:10.5px;font-weight:900;letter-spacing:.13em;text-transform:uppercase}.nav-item{display:flex;align-items:center;gap:10px;margin:2px 0;padding:8px 10px;border-radius:9px;color:#d7d8dd;text-decoration:none;font-size:14px}.nav-item:hover{background:#1c1c21}.nav-item.active{background:var(--blue);color:#fff;font-weight:800}.nav-icon{width:25px;height:25px;display:grid;place-items:center;border-radius:7px;background:rgba(255,255,255,.09);font-size:14px;flex:0 0 auto}.nav-item.active .nav-icon{background:rgba(255,255,255,.18)}
    main{min-width:0;padding:40px 54px 72px;background:#fff}.content{max-width:1120px;margin:0 auto}.page-switch{display:inline-flex;gap:3px;margin-bottom:28px;padding:4px;border:1px solid var(--line);border-radius:999px;background:var(--surface)}.page-btn{border:0;border-radius:999px;background:transparent;color:var(--muted);padding:8px 14px;font-size:13px;font-weight:850}.page-btn.active{background:var(--black);color:#fff}
    .hero{display:block;max-width:900px;margin-bottom:28px}.hero h1{max-width:860px}.hero .lead{max-width:820px}.feature-icon{width:58px;height:58px;display:grid;place-items:center;margin-bottom:15px;border:1px solid #b9ccf3;border-radius:16px;background:var(--blue-soft);font-size:29px}.eyebrow{margin-bottom:9px;color:var(--blue-dark);font-size:12px;font-weight:900;letter-spacing:.15em;text-transform:uppercase}h1{margin:0 0 16px;max-width:690px;font-size:clamp(42px,4.7vw,56px);line-height:1.02;letter-spacing:-.045em;font-weight:780}.lead{max-width:740px;margin:0 0 20px;color:#333741;font-size:19px;line-height:1.62}.pills{display:flex;flex-wrap:wrap;gap:8px}.pill{padding:5px 10px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--muted);font-size:12.5px;font-weight:750}
    .visual-wrap{margin:8px 0 40px}.visual{position:relative;overflow:hidden;padding:21px;border:1px solid var(--feature-accent,#2563eb);border-radius:18px;background:var(--feature-tint,var(--blue-soft));color:var(--ink);box-shadow:none}.visual:before{content:"";position:absolute;width:230px;height:230px;right:-92px;top:-142px;border-radius:50%;background:var(--feature-accent,#2563eb);opacity:.1}.visual-title{position:relative;z-index:1;color:var(--feature-accent,var(--blue-dark));font-size:11px;font-weight:900;letter-spacing:.13em;text-transform:uppercase}.visual-body{position:relative;z-index:1;margin-top:15px}.visual-body:has(>.v-row:nth-child(2)){display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:10px}.v-row{display:grid;grid-template-columns:36px 1fr auto;gap:10px;align-items:center;min-height:82px;padding:12px;margin:0;border:1px solid rgba(95,111,140,.28);border-radius:12px;background:rgba(255,255,255,.84)}.v-row strong{display:block;font-size:14px;line-height:1.25}.v-row small{display:block;color:#666d7b;font-size:12.5px;line-height:1.35}.v-icon{width:34px;height:34px;display:grid;place-items:center;border-radius:9px;background:var(--feature-tint,var(--blue-soft))}.v-arrow{color:var(--feature-accent,var(--blue));font-size:20px}.v-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.v-tile{min-height:98px;padding:14px;border:1px solid rgba(95,111,140,.28);border-radius:12px;background:rgba(255,255,255,.84)}.v-tile b{display:block;margin:6px 0 2px;font-size:14px}.v-tile small{color:#666d7b;line-height:1.35}.wave{display:flex;align-items:center;justify-content:center;gap:6px;height:126px}.wave i{display:block;width:8px;border-radius:999px;background:linear-gradient(var(--feature-accent,#7ca6ff),#8fb0f3);height:var(--h)}
    .section{margin-top:36px}.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:14px}.section h2{margin:0;font-size:25px;line-height:1.15;letter-spacing:-.025em}.section-intro{margin:6px 0 0;color:var(--muted);max-width:760px}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.card{min-height:170px;padding:19px;border:1px solid var(--line);border-radius:16px;background:#fff}.card.blue{background:var(--blue-soft);border-color:#c9d9f7}.card.green{background:var(--green);border-color:#c8e7d7}.card.yellow{background:var(--yellow);border-color:#eadb9d}.card.purple{background:var(--purple);border-color:#d9d0fa}.card.orange{background:var(--orange);border-color:#efd3c0}.card.pink{background:var(--pink);border-color:#ecced9}.card.dark{background:var(--black);border-color:var(--black);color:#fff}.card-emoji{display:block;margin-bottom:8px;font-size:24px}.card h3{margin:0 0 7px;font-size:17px;line-height:1.25}.card p{margin:0;color:#555b68;font-size:14.5px;line-height:1.5}.card.dark p{color:#c7c9d0}.card ul{margin:8px 0 0;padding-left:19px}.card li{margin:5px 0;color:#4c5260;font-size:14px}.card.dark li{color:#d4d6dc}
    .steps{counter-reset:step;display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.step{position:relative;min-height:175px;padding:52px 16px 17px;border:1px solid var(--line);border-radius:15px;background:#fff}.step:before{counter-increment:step;content:counter(step);position:absolute;top:15px;left:15px;width:26px;height:26px;display:grid;place-items:center;border-radius:50%;background:var(--blue);color:#fff;font-size:12px;font-weight:900}.step b{display:block;margin-bottom:6px;font-size:15px}.step span{color:var(--muted);font-size:14px;line-height:1.45}
    .callout{display:grid;grid-template-columns:42px 1fr;gap:14px;align-items:start;margin-top:24px;padding:20px;border:1px solid #bdcff3;border-radius:16px;background:var(--blue-soft)}.callout-icon{width:40px;height:40px;display:grid;place-items:center;border-radius:12px;background:#fff;font-size:21px}.callout strong{display:block;margin-bottom:2px}.callout p{margin:0;color:#394252;font-size:15px}
    .compare{overflow:hidden;border:1px solid var(--line);border-radius:16px}.compare-row{display:grid;grid-template-columns:1fr 1.2fr 1.2fr}.compare-row>div{padding:13px 16px;border-top:1px solid var(--line);font-size:14px}.compare-row:first-child>div{border-top:0;background:var(--black);color:#fff;font-weight:850}.compare-row>div+div{border-left:1px solid var(--line)}.compare-row:not(:first-child)>div:first-child{font-weight:800;background:#f8f9fb}
    .prompt-box{position:relative;margin-top:14px;padding:22px 58px 22px 22px;border-radius:16px;background:var(--black);color:#fff;font:15px/1.65 ui-monospace,SFMono-Regular,Menlo,monospace}.prompt-box:after{content:"✦";position:absolute;right:20px;top:18px;color:#79a5ff;font-size:23px}.prompt-box em{color:#8eb2ff;font-style:normal}
    .page-nav{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:44px;padding-top:24px;border-top:1px solid var(--line)}.next-link{padding:15px 17px;border:1px solid var(--line);border-radius:14px;text-decoration:none;background:#fff}.next-link:last-child{text-align:right}.next-link small{display:block;color:var(--muted);font-size:11px;text-transform:uppercase;letter-spacing:.1em}.next-link b{font-size:14px}
    .home-hero{padding:12px 0 20px;max-width:760px}.home-hero h1{font-size:clamp(46px,6vw,68px)}.home-mark{width:64px;height:64px;display:grid;place-items:center;margin-bottom:22px;border-radius:50%;background:var(--black);color:#fff;font-size:28px;box-shadow:0 0 0 9px var(--blue-soft)}.home-lead{font-size:20px;color:#444a56}.home-group{margin-top:32px}.home-group h2{margin:0 0 5px;font-size:24px}.home-group>p{margin:0 0 14px;color:var(--muted)}.feature-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.feature-card{position:relative;min-height:220px;display:flex;flex-direction:column;padding:20px;border:1px solid var(--line);border-radius:17px;background:#fff;text-decoration:none;overflow:hidden;transition:.18s ease}.feature-card:after{content:"";position:absolute;left:0;right:0;bottom:0;height:5px;background:var(--accent,var(--blue))}.feature-card:hover{transform:translateY(-3px);border-color:#aebfe2;box-shadow:var(--shadow)}.feature-card .fc-icon{width:46px;height:46px;display:grid;place-items:center;margin-bottom:18px;border-radius:13px;background:var(--tint,var(--blue-soft));font-size:23px}.feature-card h3{margin:0 0 7px;font-size:19px}.feature-card p{margin:0;color:var(--muted);font-size:14.5px}.feature-card b{margin-top:auto;padding-top:18px;color:var(--blue-dark);font-size:13px}.new-badge{position:absolute;top:18px;right:18px;padding:5px 9px;border-radius:999px;background:var(--black);color:#fff;font-size:10px;font-weight:900;letter-spacing:.1em;text-transform:uppercase}
    .menu-btn{display:none;border:0;background:var(--black);color:#fff;border-radius:9px;width:38px;height:38px}.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
    @media(max-width:980px){.layout{grid-template-columns:220px minmax(0,1fr)}main{padding:34px 30px 60px}.visual-body:has(>.v-row:nth-child(2)),.v-grid{grid-template-columns:repeat(2,1fr)}.grid,.feature-cards{grid-template-columns:repeat(2,1fr)}.steps{grid-template-columns:repeat(2,1fr)}}
    @media(max-width:720px){body{font-size:16px}.topbar{padding:9px 14px}.menu-btn{display:grid;place-items:center}.layout{display:block}aside{position:fixed;left:0;top:60px;bottom:0;width:276px;height:auto;z-index:45;transform:translateX(-105%);transition:.22s ease;box-shadow:20px 0 50px rgba(0,0,0,.25)}body.menu-open aside{transform:translateX(0)}main{padding:30px 18px 52px}.top-chip{display:none}h1{font-size:40px}.lead{font-size:17px}.grid,.grid.two,.feature-cards{grid-template-columns:1fr}.steps{grid-template-columns:1fr}.compare{overflow-x:auto}.compare-row{min-width:680px}.page-nav{grid-template-columns:1fr}.next-link:last-child{text-align:left}.visual-body:has(>.v-row:nth-child(2)),.v-grid{grid-template-columns:1fr}.visual-wrap{margin-bottom:32px}}
  
.topic-page[hidden]{display:none}