:root{--cream:#f3eee4;--ink:#16181d;--mute:#6b665d;--or:#ff5a12;--line:rgba(22,24,29,.07)}
*{box-sizing:border-box}html,body{margin:0;height:100%}
body{background:var(--cream);color:var(--ink);font-family:"Inter Tight",system-ui,sans-serif;overflow:hidden;
 background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:56px 56px}
body:after{content:"";position:fixed;inset:0;pointer-events:none;filter:url(#grain);opacity:.18;background:#fff;mix-blend-mode:multiply}
a{color:inherit}
.rail{position:fixed;left:0;top:0;bottom:0;width:220px;padding:32px 28px;border-right:1px solid rgba(22,24,29,.15);display:flex;flex-direction:column;z-index:5;background:rgba(243,238,228,.85);backdrop-filter:blur(4px)}
.logo{font-weight:800;font-size:22px;line-height:1;text-decoration:none;letter-spacing:-.02em}.logo span{color:var(--or)}
.rail nav{margin-top:60px;display:flex;flex-direction:column;gap:14px}
.rail nav a{text-decoration:none;font-size:14px;text-transform:uppercase;letter-spacing:.12em;color:var(--mute)}
.rail nav a:hover,.rail nav a.on{color:var(--ink)}.rail nav a.on:before{content:"— ";color:var(--or)}
.rail-foot{margin-top:auto;font-size:13px;color:var(--mute);line-height:1.4}
#track{position:fixed;left:220px;right:0;top:0;bottom:0;display:flex;overflow-x:auto;overflow-y:hidden;scroll-snap-type:x mandatory;scrollbar-width:none}
#track::-webkit-scrollbar{display:none}
.panel{flex:0 0 auto;width:min(78vw,980px);height:100%;padding:9vh 64px;border-right:1px solid rgba(22,24,29,.12);position:relative;scroll-snap-align:start;display:flex;flex-direction:column;justify-content:center}
.hero{width:calc(100vw - 220px)}
.label{color:var(--or);font-size:13px;text-transform:uppercase;letter-spacing:.16em;font-weight:600;margin:0 0 18px}
h1{font-size:clamp(44px,6.4vw,104px);line-height:.95;letter-spacing:-.045em;font-weight:800;margin:0;max-width:16ch}
h1 em,h2 em{font-style:normal;color:var(--or)}
h2{font-size:clamp(34px,4.2vw,68px);line-height:1;letter-spacing:-.035em;font-weight:800;margin:0;max-width:15ch}
.sub{font-size:17px;line-height:1.55;color:var(--mute);max-width:46ch;margin:26px 0 0}
.cta{display:inline-block;margin-top:34px;background:var(--ink);color:var(--cream);padding:16px 26px;text-decoration:none;font-weight:600;font-size:15px;border:0;cursor:pointer;font-family:inherit;transition:background .2s;align-self:flex-start}
.cta:hover{background:var(--or)}
.hint{position:absolute;bottom:40px;left:64px;font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--mute)}
.num{position:absolute;top:5vh;right:48px;font-size:clamp(120px,18vw,260px);font-weight:200;line-height:1;letter-spacing:-.06em;color:transparent;-webkit-text-stroke:1px rgba(22,24,29,.35)}
.list{list-style:none;padding:0;margin:34px 0 0;columns:2;column-gap:40px;max-width:640px}
.list li{break-inside:avoid;border-top:1px solid rgba(22,24,29,.15);padding:10px 0}
.list a{text-decoration:none;font-weight:600}.list a:hover{color:var(--or)}.list small{color:var(--or);margin-right:10px}
.uc .photo{height:34vh;margin:0 0 30px;position:relative;overflow:hidden;background:#2a2c31}
.uc .photo:after{content:"";position:absolute;inset:0;filter:url(#grain);background:#888;opacity:.5;mix-blend-mode:overlay}
.uc .photo b{position:absolute;left:20px;bottom:16px;color:var(--cream);font-size:12px;letter-spacing:.16em;text-transform:uppercase;font-weight:600;z-index:1}
.uc .photo svg{position:absolute;right:28px;top:50%;transform:translateY(-50%);width:34%;height:70%;stroke:var(--or);fill:none;stroke-width:1.4}
.uc h2{font-size:clamp(30px,3.6vw,56px)}
.uc .num{top:auto;bottom:4vh}
.go{margin-top:22px;font-weight:600;text-decoration:none;border-bottom:2px solid var(--or);align-self:flex-start;padding-bottom:3px}.go:hover{color:var(--or)}
form{display:flex;gap:0;margin-top:30px;max-width:520px}
input{flex:1;padding:16px 18px;border:1px solid var(--ink);background:transparent;font:inherit;font-size:15px}
form .cta{margin:0}.ok{color:var(--or);font-weight:600}
.progress{position:fixed;left:220px;right:0;bottom:0;height:3px;background:rgba(22,24,29,.08);z-index:6}.progress i{display:block;height:100%;width:0;background:var(--or)}
@media(max-width:760px){body{overflow:auto}.rail{position:static;width:auto;flex-direction:row;align-items:center;padding:16px;border:0;border-bottom:1px solid rgba(22,24,29,.15)}.rail nav,.rail-foot{display:none}
#track{position:static;display:block;overflow:visible}.panel,.hero{width:auto;height:auto;min-height:80vh;padding:60px 22px;border-right:0;border-bottom:1px solid rgba(22,24,29,.12)}.num{font-size:110px;right:16px}.list{columns:1}.progress,.hint{display:none}}
/* ---- v2 polish ---- */
body{-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
::selection{background:var(--or);color:#fff}
.rail nav a{position:relative;padding-left:0;transition:color .2s,padding .25s}
.rail nav a.on:before{content:none}
.rail nav a:after{content:"";position:absolute;left:-28px;top:50%;width:0;height:2px;background:var(--or);transition:width .25s}
.rail nav a.on{color:var(--ink);padding-left:14px;font-weight:600}.rail nav a.on:after{width:34px}
.rail nav a:hover{padding-left:8px}
h1{font-size:clamp(44px,6vw,96px);max-width:13ch}
.hero{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);column-gap:56px;align-content:center}
.hero>*{grid-column:1}.hero .hero-img{grid-column:2;grid-row:1/6;align-self:center}
.row{display:flex;gap:28px;align-items:center;margin-top:34px}.row .cta{margin:0}.row .go{margin:0}
.hero-img{margin:0;position:relative;height:62vh;overflow:hidden;box-shadow:0 30px 60px -30px rgba(22,24,29,.45)}
.hero-img img{width:100%;height:100%;object-fit:cover;filter:saturate(.85) contrast(1.05);transition:transform 1.2s}
.hero-img:hover img{transform:scale(1.04)}
.hero-img:after,.uc .photo:after,.side-img:after{content:"";position:absolute;inset:0;filter:url(#grain);background:#888;opacity:.35;mix-blend-mode:overlay;pointer-events:none}
.hero-img figcaption{position:absolute;left:0;bottom:0;background:var(--cream);padding:10px 14px;font-size:11px;letter-spacing:.14em;text-transform:uppercase;font-weight:600;z-index:1}
.stats{list-style:none;padding:0;margin:44px 0 0;display:flex;gap:40px}
.stats li{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--mute);border-top:2px solid var(--ink);padding-top:10px}
.stats b{display:block;font-size:34px;letter-spacing:-.03em;color:var(--ink);text-transform:none;font-weight:800}
.hint span{display:inline-block;color:var(--or);animation:nud 1.6s infinite}@keyframes nud{50%{transform:translateX(6px)}}
.uc .photo{display:block;height:38vh;background-size:cover;background-position:center;background-color:#2a2c31;transition:background-size .8s,box-shadow .3s;box-shadow:0 24px 50px -30px rgba(22,24,29,.5)}
.uc .photo:before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 50%,rgba(15,16,19,.65))}
.uc .photo b{z-index:2}.uc .photo i{position:absolute;right:18px;bottom:14px;z-index:2;color:#fff;background:var(--or);width:40px;height:40px;display:grid;place-items:center;font-style:normal;font-weight:800;transform:translateX(-8px);opacity:0;transition:.3s}
.uc .photo:hover i{opacity:1;transform:none}.uc .photo:hover{box-shadow:0 30px 60px -28px rgba(255,90,18,.5)}
.uc .sub{margin-top:18px}
.go{transition:color .2s,letter-spacing .2s}.go:hover{letter-spacing:.01em}
.cta{transition:background .2s,transform .2s,box-shadow .2s}.cta:hover{transform:translateY(-2px);box-shadow:0 10px 24px -10px rgba(255,90,18,.7)}
.list li{transition:padding .2s}.list li:hover{padding-left:8px}
.progress{height:4px}.progress i{width:100%!important;transform-origin:left;transform:scaleX(0);transition:transform .15s linear}
.digest,.build{width:min(92vw,1180px);padding-right:calc(40% + 64px)}
.side-img{position:absolute;top:0;right:0;bottom:0;width:40%;background-size:cover;background-position:center;border-left:1px solid rgba(22,24,29,.15)}
.digest .num,.build .num{right:calc(40% + 32px)}
.ticks{list-style:none;padding:0;margin:26px 0 0}.ticks li{padding:6px 0 6px 26px;position:relative;font-weight:600}
.ticks li:before{content:"";position:absolute;left:0;top:13px;width:12px;height:2px;background:var(--or)}
form{border:1px solid var(--ink);background:rgba(255,255,255,.4)}input{border:0;outline:0}input:focus{background:#fff}
.build{background:var(--ink);color:var(--cream)}.build .sub{color:#b6b0a5}.build .num{-webkit-text-stroke:1px rgba(243,238,228,.3)}
.build .cta{background:var(--or)}.build .cta:hover{background:var(--cream);color:var(--ink)}
.steps{list-style:none;padding:0;margin:30px 0 0;display:grid;grid-template-columns:repeat(3,1fr);gap:18px;max-width:600px;counter-reset:s}
.steps li{border-top:1px solid rgba(243,238,228,.3);padding-top:12px;font-size:14px;color:#b6b0a5;counter-increment:s}
.steps li:before{content:"0" counter(s);color:var(--or);font-size:12px;font-weight:600;letter-spacing:.1em}.steps b{display:block;color:var(--cream);margin:4px 0}
@media(max-width:760px){.hero{display:block}.hero-img{height:40vh;margin-top:30px}.digest,.build{padding-right:22px}.side-img{position:relative;width:auto;height:30vh;margin:0 -22px 24px;display:block}.steps{grid-template-columns:1fr}.stats{gap:20px}}
/* ---- v3 video loops (Hanna pattern) ---- */
.bg-video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:brightness(.72) contrast(1.1) saturate(.8);z-index:0}
.hero-img.has-video{background:#16181d url(video/hero-poster.jpg) center/cover}
.hero-img.has-video:before,.uc .photo.has-video:before{content:"";position:absolute;inset:0;z-index:1;pointer-events:none;background:linear-gradient(180deg,rgba(15,16,19,.05) 40%,rgba(15,16,19,.6)),repeating-linear-gradient(118deg,transparent 0 70px,rgba(255,255,255,.02) 71px 72px)}
.hero-img.has-video:after,.uc .photo.has-video:after{z-index:1}
.hero-img figcaption{z-index:2}
.uc .photo.has-video .bg-video{transition:transform 1.2s}.uc .photo.has-video:hover .bg-video{transform:scale(1.04)}
@media(prefers-reduced-motion:reduce){.bg-video{display:none}}
/* ---- v4 guide pages ---- */
body.guide-page{overflow:auto;height:auto;min-height:100%;display:flex;align-items:stretch}
body.guide-page>.rail{position:sticky;top:0;left:auto;bottom:auto;flex:0 0 220px;height:100vh;align-self:flex-start;background:var(--cream);backdrop-filter:none;z-index:5}
.guide-page .g-wrap{margin-left:0;flex:1;min-width:0;padding:8vh 56px 14vh 48px;display:grid;grid-template-columns:minmax(0,760px) 220px;gap:72px;justify-content:start}
.guide-page h1{font-size:clamp(40px,5vw,72px);max-width:12ch;margin-bottom:28px;line-height:.95}
.g-main{overflow-x:hidden;font-size:18px;line-height:1.65;min-width:0}
.g-main p{max-width:62ch}
.g-main a{color:var(--ink);text-decoration-color:var(--or);text-underline-offset:3px}.g-main a:hover{color:var(--or)}
.g-sec{border-top:1px solid rgba(22,24,29,.18);padding-top:28px;margin-top:64px;scroll-margin-top:30px}
.g-sec h2{font-size:clamp(28px,3vw,44px);max-width:none;margin-bottom:20px}
.g-sec h2 small{display:block;font-size:12px;letter-spacing:.16em;color:var(--or);font-weight:600;margin-bottom:10px}
.g-sec[data-k=problem] p:first-of-type{font-size:22px;line-height:1.45;font-weight:600;letter-spacing:-.01em}
.g-toc{position:sticky;top:9vh;align-self:start;display:flex;flex-direction:column;gap:10px;font-size:13px}
.g-toc a{text-decoration:none;color:var(--mute);border-left:2px solid rgba(22,24,29,.15);padding:3px 0 3px 12px;transition:.2s}
.g-toc a:hover{color:var(--ink)}.g-toc a.on{color:var(--ink);border-color:var(--or);font-weight:600}
.viz-beforeafter{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:8px 0 22px}
.ba{padding:22px 24px;border:1px solid rgba(22,24,29,.18);background:rgba(255,255,255,.35)}
.ba span,.viz-callout span,.price span,.tool-card footer span{display:block;font-size:11px;letter-spacing:.16em;text-transform:uppercase;font-weight:600;margin-bottom:8px}
.ba p{margin:0;font-size:17px;line-height:1.45}
.ba.before{color:var(--mute)}.ba.before span{color:var(--mute)}
.ba.after{border:2px solid var(--or);background:#fff;font-weight:600;box-shadow:0 18px 40px -26px rgba(255,90,18,.6)}.ba.after span{color:var(--or)}
.viz-callout{border-left:4px solid var(--or);background:var(--ink);color:var(--cream);padding:20px 26px;margin:18px 0}
.viz-callout span{color:var(--or)}.viz-callout p{margin:0;font-size:19px;line-height:1.45;font-weight:600}
.viz-diagram{margin:26px 0 8px;padding:20px 18px 12px;border:1px solid rgba(22,24,29,.18);background:rgba(243,238,228,.7)}
.viz-diagram svg{width:100%;height:auto;display:block;font-family:"Inter Tight",sans-serif}
.viz-diagram rect.b,.viz-diagram rect[fill="#fbf8f2"]{fill:#fbf8f2!important;stroke:var(--ink);stroke-width:1.2}.viz-diagram rect.o,.viz-diagram rect[fill="#ffffff"]{fill:#fff!important;stroke:var(--or);stroke-width:2.2}
.viz-diagram text{font-size:13px;font-weight:600;fill:var(--ink)}.viz-diagram text.s{font-size:11px;fill:var(--or);letter-spacing:.06em}
.viz-diagram .a{stroke:var(--ink);stroke-width:1.3;fill:none;stroke-dasharray:4 3}.viz-diagram marker path{fill:var(--ink)}
.viz-diagram figcaption{font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--mute);margin-top:8px}
.g-ticks li{font-weight:600;padding:12px 0 12px 30px;border-bottom:1px solid rgba(22,24,29,.1)}.g-ticks li:before{top:24px;width:16px;height:3px}
.g-who{list-style:none;padding:0}.g-who li{padding:8px 0 8px 22px;position:relative}.g-who li:before{content:"→";position:absolute;left:0;color:var(--or)}
.viz-tools{display:grid;gap:18px;margin-top:20px}
.tool-card{background:#fff;border:1px solid rgba(22,24,29,.18);padding:24px 26px 0;transition:transform .2s,box-shadow .2s}
.tool-card:hover{transform:translateY(-3px);box-shadow:0 22px 44px -28px rgba(22,24,29,.45)}
.tool-card header{display:flex;justify-content:space-between;align-items:baseline;gap:12px}
.tool-card h3{margin:0;font-size:26px;letter-spacing:-.03em;font-weight:800}
.tool-link{font-size:13px;font-weight:600;text-decoration:none!important;border-bottom:2px solid var(--or);white-space:nowrap}
.tool-card .chip{display:inline-block;background:rgba(255,90,18,.1);color:#b83d06;font-size:13px;font-weight:600;padding:5px 10px;margin:12px 0 4px;line-height:1.4}
.tool-card p{font-size:16px}.price{border-top:1px solid rgba(22,24,29,.1);padding-top:12px}.price span{color:var(--or)}
.tool-card footer{margin:16px -26px 0;padding:14px 26px;background:var(--cream);border-top:1px solid rgba(22,24,29,.12);font-size:15px}
.tool-card footer span{color:var(--mute)}
.viz-steps{list-style:none;padding:0;margin:20px 0;counter-reset:st;position:relative}
.viz-steps:before{content:"";position:absolute;left:27px;top:10px;bottom:10px;width:2px;background:rgba(255,90,18,.35)}
.viz-steps li{counter-increment:st;position:relative;padding:4px 0 26px 84px;min-height:64px}
.viz-steps li:before{content:"0" counter(st);position:absolute;left:0;top:0;width:56px;height:56px;display:grid;place-items:center;background:var(--cream);border:2px solid var(--or);color:var(--or);font-weight:800;font-size:22px;letter-spacing:-.03em}
.viz-steps li strong{display:block;font-size:20px;letter-spacing:-.01em}
.viz-warn{list-style:none;padding:0;border:1px solid var(--ink)}
.viz-warn li{padding:14px 18px 14px 52px;position:relative;border-bottom:1px solid rgba(22,24,29,.15)}.viz-warn li:last-child{border:0}
.viz-warn li:before{content:"!";position:absolute;left:16px;top:14px;width:22px;height:22px;border:1.5px solid var(--ink);border-radius:50%;display:grid;place-items:center;font-size:13px;font-weight:800}
.g-related{columns:1}.g-related a{text-decoration:none}
.g-end{margin-top:80px;background:var(--ink);color:var(--cream);padding:40px}.g-end h2{color:var(--cream);margin-bottom:10px}.g-end .cta{background:var(--or);color:#fff}
.guide-page .progress{left:220px} /* matches sticky rail width */
@media(max-width:1100px){.guide-page .g-wrap{grid-template-columns:minmax(0,760px)}.g-toc{display:none}}
@media(max-width:760px){body.guide-page{display:block}body.guide-page>.rail{position:static;height:auto;width:auto;flex:none}.guide-page .g-wrap{margin:0;padding:40px 20px 80px}.viz-beforeafter{grid-template-columns:1fr}.guide-page .progress{left:0}.viz-steps li{padding-left:70px}.tool-card{padding:20px 18px 0}.tool-card footer{margin:16px -18px 0;padding:14px 18px}}