:root{
    --white:#FFFFFF;
    --night:#050506;
    --soft:#F5F5F7;
    --text:#1D1D1F;
    --muted:#6E6E73;
    --line:#E5E5EA;
    --orange:#EE5A00;
    --orange-2:#FF9A3C;
    --orange-deep:#C74600;
    --tint:#FFF3EA;
    --sans:-apple-system,BlinkMacSystemFont,'SF Pro Display','SF Pro Text','Inter','Segoe UI',system-ui,sans-serif;
    --serif:'Times New Roman',Times,'Liberation Serif',serif;
  }
  *{box-sizing:border-box;margin:0;padding:0}
  html{scroll-behavior:smooth;scroll-padding-top:84px;-webkit-text-size-adjust:100%;text-size-adjust:100%}
  body{font-family:var(--sans);color:var(--text);background:var(--white);line-height:1.55;font-size:17px;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
  img,svg{display:block;max-width:100%}
  a{color:inherit}
  button,input,select,textarea{font:inherit;color:inherit}
  :focus-visible{outline:3px solid var(--orange);outline-offset:3px;border-radius:8px}
  .wrap{width:min(1120px,100% - 40px);margin-inline:auto}
  h1,h2,h3{font-weight:700;line-height:1.05;letter-spacing:-.035em}
  h2{font-size:clamp(2rem,4.8vw,3.4rem);max-width:18ch}
  .lede{color:var(--muted);font-size:1.2rem;line-height:1.5;max-width:44ch;margin-top:18px}
  .hl{background:linear-gradient(90deg,var(--orange),var(--orange-2));-webkit-background-clip:text;background-clip:text;color:transparent}
  section{padding:120px 0}

  /* Кнопки */
  .btn{position:relative;overflow:hidden;display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:16px 30px;border-radius:999px;border:0;background:linear-gradient(180deg,#FF7A1A,#EE5A00);color:#fff;font-weight:600;font-size:1rem;text-decoration:none;cursor:pointer;
    box-shadow:0 10px 24px -10px rgba(238,90,0,.7),inset 0 1px 0 rgba(255,255,255,.3);
    transition:transform .2s,box-shadow .25s,background .2s,translate .25s cubic-bezier(.2,.8,.2,1)}
  .btn::after{content:"";position:absolute;top:0;left:-60%;width:40%;height:100%;background:linear-gradient(100deg,transparent,rgba(255,255,255,.4),transparent);transform:skewX(-20deg);transition:left .6s;pointer-events:none}
  .btn:hover{transform:translateY(-2px);box-shadow:0 16px 28px -12px rgba(238,90,0,.8),inset 0 1px 0 rgba(255,255,255,.3)}
  .btn:hover::after{left:130%}
  .btn:active{transform:translateY(1px);box-shadow:0 4px 10px -6px rgba(238,90,0,.8)}
  .btn.ghost{background:rgba(0,0,0,.06);color:var(--text);box-shadow:none}
  .btn.ghost:hover{background:rgba(0,0,0,.1);box-shadow:none}

  /* Прогресс прокрутки */
  .scroll-bar{position:fixed;left:0;top:0;height:3px;width:100%;transform-origin:left;transform:scaleX(0);background:linear-gradient(90deg,var(--orange),var(--orange-2));z-index:60;pointer-events:none}

  /* Шапка */
  .top{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.72);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid rgba(0,0,0,.06);transition:background .3s,box-shadow .3s}
  .top.scrolled{background:rgba(255,255,255,.88);box-shadow:0 8px 28px -20px rgba(0,0,0,.4)}
  .top .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:20px;transition:height .3s}
  .top.scrolled .wrap{height:56px}
  .logo{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:700;font-size:1.2rem;letter-spacing:-.03em}
  .logo svg{width:28px;height:28px}
  .top nav{display:flex;gap:34px;font-size:.92rem}
  .top nav a{position:relative;padding:6px 0;text-decoration:none;color:rgba(29,29,31,.78);font-weight:500;transition:color .2s}
  .top nav a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;background:var(--orange);transform:scaleX(0);transform-origin:left;transition:transform .3s}
  .top nav a:hover{color:var(--text)}
  .top nav a:hover::after,.top nav a.active::after{transform:scaleX(1)}
  .top nav a.active{color:var(--text)}
  .top .btn{padding:9px 20px;font-size:.92rem}

  /* Тёмная шапка над сценой с книгой */
  .top,.top .logo,.top nav a{transition-property:background,box-shadow,border-color,color,height}
  body.on-dark .top,body.on-dark .top.scrolled{background:rgba(0,0,0,.6);border-bottom-color:rgba(255,255,255,.1)}
  body.on-dark .top .logo{color:#fff}
  body.on-dark .top nav a{color:rgba(255,255,255,.78)}
  body.on-dark .top nav a:hover,body.on-dark .top nav a.active{color:#fff}

  /* Появление блоков */
  .js .rv{opacity:0;transform:translateY(32px);transition:opacity .9s cubic-bezier(.2,.7,.2,1),transform .9s cubic-bezier(.2,.7,.2,1);transition-delay:var(--rd,0s)}
  .js .rv.in{opacity:1;transform:none}

  /* Первый экран */
  .hero{position:relative;overflow:hidden;padding:88px 0 150px;background:radial-gradient(55% 450% at 8% 80%,rgba(255,106,0,.14),transparent 700%),radial-gradient(4% 40% at 5% 9%,rgba(255,154,60,.10),transparent 70%),#fff}
  .hero .wrap{position:relative;z-index:1;display:grid;grid-template-columns:1.1fr .9fr;gap:72px;align-items:center}
  .hero{min-height:100vh;min-height:100svh;display:flex;align-items:center;padding-top:110px}
  .hero>.wrap{width:100%;grid-template-columns:1fr;justify-items:center;text-align:center}
  .hero .lede{max-width:640px;margin-left:auto;margin-right:auto}
  .hero .actions{justify-content:center}
  .hero h1{max-width:15ch;margin:0 auto;font-size:clamp(2.6rem,6.2vw,5rem);font-weight:700;letter-spacing:-.025em;line-height:1.02}
  .hero .lede{margin-top:26px}
  .hero .actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:38px}
  .hero .free{margin-top:20px;color:var(--muted);font-size:.95rem}
  .w{display:inline-block;overflow:hidden;vertical-align:top;padding-bottom:.14em;margin-bottom:-.14em}
  .w>span{display:inline-block;transform:translateY(112%);animation:wordUp .9s cubic-bezier(.2,.8,.2,1) forwards;animation-delay:calc(var(--i) * .08s + .1s)}
  @keyframes wordUp{to{transform:none}}

  .sym-layer{position:absolute;inset:0;pointer-events:none;z-index:0}
  .sym-layer span{position:absolute;font-family:var(--serif);font-style:italic;color:var(--orange);opacity:.11;translate:0 calc(var(--sy,0px) * var(--k) * -.35);animation:floaty 9s ease-in-out infinite}
  @keyframes floaty{0%,100%{transform:translateY(0) rotate(-4deg)}50%{transform:translateY(-16px) rotate(5deg)}}

  .sheet{position:relative;background:#fff;border-radius:8px;padding:36px 38px 40px;color:#111;font-family:var(--serif);
    box-shadow:0 0 0 1px rgba(0,0,0,.05),0 2px 6px rgba(0,0,0,.05),0 40px 80px -30px rgba(0,0,0,.35);
    transform:perspective(900px) rotateX(var(--rx,0deg)) rotateY(var(--ry,0deg)) rotate(-1.6deg);transition:transform .25s ease-out}
  .sheet .task{font-size:1.1rem;line-height:1.4;margin-bottom:14px}
  .ln{font-size:1.45rem;line-height:2.1;color:#111;white-space:nowrap;clip-path:inset(0 100% 0 0);animation:write .7s steps(16) forwards;animation-delay:var(--d)}
  @keyframes write{to{clip-path:inset(0 0 0 0)}}
  .ln.sm{font-size:1.15rem;line-height:1.9;color:#333}
  .circled{position:relative;display:inline-block;padding:0 16px}
  .circled svg{position:absolute;inset:6px -4px 2px -4px;width:calc(100% + 8px);height:calc(100% - 8px);overflow:visible}
  .circled path{fill:none;stroke:var(--orange);stroke-width:3;stroke-linecap:round;stroke-dasharray:1;stroke-dashoffset:1;animation:draw .7s ease-out forwards;animation-delay:calc(var(--d) + .6s)}
  @keyframes draw{to{stroke-dashoffset:0}}
  .note{font-family:var(--sans);font-weight:600;font-size:.9rem;color:var(--orange-deep);margin-top:14px;display:flex;align-items:center;gap:8px;opacity:0;animation:fade .5s forwards;animation-delay:var(--d)}
  .note svg{width:20px;height:20px;flex:none}
  .note path{fill:none;stroke:var(--orange);stroke-width:3.4;stroke-linecap:round;stroke-linejoin:round}
  @keyframes fade{to{opacity:1}}

  .cue{position:absolute;left:50%;bottom:26px;transform:translateX(-50%);display:flex;flex-direction:column;align-items:center;gap:8px;font-size:.82rem;color:var(--muted);text-decoration:none;z-index:1}
  .cue i{width:2px;height:34px;background:linear-gradient(var(--orange),transparent);transform-origin:top;animation:cue 1.8s ease-in-out infinite}
  @keyframes cue{0%{transform:scaleY(0);opacity:1}60%{transform:scaleY(1);opacity:1}100%{transform:scaleY(1);opacity:0}}

  /* Дроби и формулы (общие) */
  .fr{display:inline-flex;flex-direction:column;vertical-align:middle;text-align:center;line-height:1.15;margin:0 .12em}
  .fr>span:first-child{border-bottom:.06em solid currentColor;padding:0 .2em .08em}
  .fr>span:last-child{padding:.08em .2em 0}
  .ov{border-top:.06em solid currentColor;padding-top:.04em}
  sub,sup{font-size:.68em;line-height:0}

  /* ===== Книга, которая открывается при прокрутке ===== */
  .book-scene{position:relative;height:470vh;padding:0}
  .book-stage{position:sticky;top:0;height:100vh;height:100svh;height:100dvh;overflow:hidden;background:var(--night);
    --W:min(34vw,40vh,420px);--H:calc(var(--W) * 1.32)}
  .book-title{position:absolute;top:calc(64px + 3.5vh);left:20px;right:20px;z-index:3;text-align:center;max-width:none;font-size:clamp(2rem,5vw,4rem);letter-spacing:-.045em;color:#fff;opacity:0;pointer-events:none}
  .book-stage.dark .book-title{color:#fff}
  /* фон сцены */
  .stage-bg{position:absolute;inset:0;overflow:hidden;background:radial-gradient(ellipse 70% 62% at 12% 12%,rgba(255,78,0,.22),transparent 68%),radial-gradient(ellipse 62% 70% at 88% 24%,rgba(255,48,36,.19),transparent 70%),radial-gradient(ellipse 72% 55% at 52% 100%,rgba(255,125,18,.13),transparent 72%),var(--night);pointer-events:none}
  .stage-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(to bottom,rgba(5,5,6,0) 62%,var(--night) 100%)}
  .blob{position:absolute;display:block;border-radius:50%;filter:blur(80px) saturate(150%);will-change:transform}
  .b1{width:60vmax;height:60vmax;left:-18vmax;top:-26vmax;background:radial-gradient(circle,rgba(255,106,0,.85),rgba(255,106,0,0) 66%);opacity:.72;animation:drift1 20s ease-in-out infinite alternate}
  .b2{width:52vmax;height:52vmax;right:-16vmax;top:-12vmax;background:radial-gradient(circle,rgba(255,60,40,.8),rgba(255,60,40,0) 66%);opacity:.48;animation:drift2 24s ease-in-out infinite alternate}
  .b3{width:46vmax;height:46vmax;left:30vw;top:8vh;background:radial-gradient(circle,rgba(255,170,70,.7),rgba(255,170,70,0) 66%);opacity:.34;animation:drift3 28s ease-in-out infinite alternate}
  @keyframes drift1{to{transform:translate(8vmax,6vmax) scale(1.12)}}
  @keyframes drift2{to{transform:translate(-7vmax,8vmax) scale(.92)}}
  @keyframes drift3{to{transform:translate(-6vmax,-3vmax) scale(1.18)}}
  .dots{position:absolute;inset:0;display:block;opacity:.5;background-image:radial-gradient(rgba(255,255,255,.16) 1px,transparent 1.2px);background-size:30px 30px;-webkit-mask-image:radial-gradient(ellipse at 50% 45%,#000 10%,transparent 70%);mask-image:radial-gradient(ellipse at 50% 45%,#000 10%,transparent 70%)}
  .grain{position:absolute;inset:0;display:block;opacity:.07;mix-blend-mode:overlay;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='180' height='180'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>")}
  .book-glow{position:absolute;left:50%;top:50%;width:95vmin;height:95vmin;margin:-47.5vmin 0 0 -47.5vmin;background:radial-gradient(circle,rgba(255,106,0,.34),rgba(255,106,0,0) 62%);opacity:0;pointer-events:none}
  .bg-sym{position:absolute;font-family:var(--serif);font-style:italic;color:#fff;opacity:0;pointer-events:none}
  .book-shadow{position:absolute;left:50%;top:calc(50% + var(--H) / 2 + 2vh);width:var(--W);height:3.5vh;margin-left:calc(var(--W) / -2);
    background:radial-gradient(closest-side,rgba(0,0,0,.5),rgba(0,0,0,0));filter:blur(6px);opacity:0}
  .book-fade{position:absolute;inset:0}
  .book{position:absolute;left:50%;top:50%;width:var(--W);height:var(--H);margin:calc(var(--H) / -2) 0 0 calc(var(--W) / -2);
    font-size:max(9.5px,calc(var(--W) / 19));transform-style:preserve-3d;will-change:transform}
  .book > *{position:absolute;left:0;top:0;width:100%;height:100%}
  .backcover{top:-.4em !important;width:calc(100% + .4em) !important;height:calc(100% + .8em) !important;background:#9E3300;border-radius:0 .6em .6em 0;transform:translateZ(-1.1em)}
  .edge{left:100% !important;width:1.1em !important;transform-origin:left center;transform:rotateY(90deg);
    background:repeating-linear-gradient(0deg,#fff 0 .14em,#d9d9de .14em .22em)}
  .leaf{transform-style:preserve-3d;transform-origin:left center;will-change:transform}
  .leaf.cover{width:calc(100% + .4em);height:calc(100% + .8em);top:-.4em}
  .face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;overflow:hidden}
  .face.back{transform:rotateY(180deg)}
  .face::after{content:"";position:absolute;inset:0;pointer-events:none;opacity:var(--s,0);background:linear-gradient(90deg,rgba(0,0,0,.45),rgba(0,0,0,0) 75%)}
  .face.back::after{background:linear-gradient(270deg,rgba(0,0,0,.45),rgba(0,0,0,0) 75%)}

  /* страницы как в Word */
  .page{background-color:#fff;color:#000;font-family:var(--serif);padding:1.9em 1.8em 2.4em 2.3em}
  .page.right{border-radius:0 .35em .35em 0;background-image:linear-gradient(90deg,rgba(0,0,0,.17),rgba(0,0,0,0) 9%)}
  .page.left{border-radius:.35em 0 0 .35em;padding:1.9em 2.3em 2.4em 1.8em;background-image:linear-gradient(270deg,rgba(0,0,0,.17),rgba(0,0,0,0) 9%)}
  .kick{font-size:.62em;letter-spacing:.14em;text-transform:uppercase;color:#6b6b6b;font-family:var(--serif)}
  .ttl{font-size:1.05em;font-weight:700;line-height:1.2;margin-top:.35em;padding-bottom:.55em;border-bottom:.06em solid #000}
  .eq{display:grid;grid-template-columns:1fr auto;align-items:center;margin-top:1em}
  .eq .m{text-align:center;font-size:1.12em;white-space:nowrap}
  .eq .n{font-size:.8em;color:#222}
  .pn{position:absolute;bottom:.9em;left:0;right:0;text-align:center;font-size:.75em;color:#444}
  .page{display:flex;flex-direction:column}
  .hd{padding-bottom:.8em;border-bottom:.06em solid #000}
  .hd .ttl{font-size:1.6em;line-height:1.1;margin:.28em 0 0;padding:0;border:0;letter-spacing:-.01em}
  .hd .sub{font-size:.82em;font-style:italic;color:#555;margin-top:.3em}
  .eqs{flex:1;display:flex;flex-direction:column;justify-content:space-evenly;padding-top:.3em}
  .fx{display:block}
  .eqs .eq{margin-top:0}
  .eqs .eq .m{font-size:1.32em}
  .eqs .eq .n{font-size:.85em}
  .eqc{text-align:center;font-style:italic;font-size:.78em;color:#555;margin-top:.5em}
  .toc{display:flex;align-items:baseline;font-size:1.08em}
  .toc i{flex:1;margin:0 .5em;border-bottom:.1em dotted #888;transform:translateY(-.25em)}
  .toc b{font-weight:400}

  .cover-in{display:grid;place-items:center;background:#B93D00;border-radius:.6em 0 0 .6em;padding:.4em 0 .4em .4em}
  .cv-mark{width:28%;height:auto}
  .cover-in .page{position:relative;height:100%;border-radius:.3em 0 0 .3em}
  .cover-art{background:linear-gradient(150deg,#FF8E34,#E8530A 52%,#B43A00);border-radius:0 .6em .6em 0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1.5em;color:#fff;text-align:center;padding:0 1.6em 0 2.4em}
  .cover-art::before{content:"";position:absolute;inset:0;background:radial-gradient(120% 70% at 15% 0%,rgba(255,255,255,.30),rgba(255,255,255,0) 55%)}
  .spine-shade{position:absolute;left:0;top:0;bottom:0;width:2.2em;background:linear-gradient(90deg,rgba(0,0,0,.38),rgba(0,0,0,0));border-right:.1em solid rgba(255,255,255,.18)}
  .cv-logo{position:relative;width:3.6em;height:3.6em}
  .cv-title{position:relative;font-family:var(--sans);font-weight:700;font-size:2.05em;line-height:1.08;letter-spacing:-.035em;padding:.55em 0;border-top:.07em solid rgba(255,255,255,.7);border-bottom:.07em solid rgba(255,255,255,.7)}
  .brand{position:relative;font-weight:600;font-size:.72em;letter-spacing:.2em;text-transform:uppercase;color:rgba(255,255,255,.85)}

  .book-progress{position:absolute;left:50%;bottom:3vh;width:120px;height:3px;margin-left:-60px;background:rgba(130,130,140,.35);border-radius:3px;overflow:hidden;z-index:3}
  .book-progress i{display:block;height:100%;width:0;background:var(--orange)}
  .book-cta{position:absolute;left:0;right:0;bottom:7vh;display:flex;justify-content:center;opacity:0;pointer-events:none;z-index:3}


  /* Сцена: фраза загорается */
  .lit{position:relative;height:300vh;background:var(--night);color:#fff}
  .lit-stage{position:sticky;top:0;height:100vh;height:100svh;height:100dvh;display:grid;place-items:center;padding:0 clamp(20px,6vw,90px);overflow:hidden}
  .lit-stage::before{content:"";position:absolute;width:80vmax;height:80vmax;left:50%;top:50%;translate:-50% -50%;background:radial-gradient(closest-side,rgba(238,90,0,calc(.05 + var(--lg,0)*.22)),transparent 70%);pointer-events:none}
  .lit p{position:relative;max-width:1120px;font-size:clamp(1.9rem,5.4vw,4.5rem);font-weight:700;letter-spacing:-.04em;line-height:1.1;margin:0}
  .lit .w{display:inline-block;margin-right:.26em;opacity:.14;will-change:opacity}
  .lit .w.k{color:var(--orange-2)}

  /* Сцена: механика оживает */
  .mech{position:relative;height:260vh;background:var(--night);color:#F5F5F7}
  .mech-stage{position:sticky;top:0;height:100vh;height:100svh;height:100dvh;overflow:hidden;display:flex;flex-direction:column;padding:84px clamp(20px,5vw,80px) 28px}
  .mech-stage::before{content:"";position:absolute;inset:0;background:radial-gradient(60% 55% at 72% 50%,rgba(238,90,0,.16),transparent 70%),radial-gradient(40% 40% at 10% 100%,rgba(255,154,60,.08),transparent 70%);pointer-events:none}
  .mech-grid{position:relative;flex:1;min-height:0;display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.3fr);gap:clamp(20px,4vw,64px);align-items:center;max-width:1280px;width:100%;margin:0 auto}
  .mech-txts{display:grid}
  .mt{grid-area:1/1;will-change:opacity,transform}
  .mt .kick{display:inline-block;font-size:.8rem;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--orange-2);margin-bottom:18px}
  .mt h2{color:#fff;font-size:clamp(2rem,4.4vw,3.6rem);line-height:1.04;letter-spacing:-.045em;margin:0 0 22px}
  .mt .fm{font-family:var(--serif);font-style:italic;font-size:clamp(1.3rem,2.4vw,2rem);color:#fff;padding:14px 20px;border:1px solid rgba(255,255,255,.14);border-radius:14px;display:inline-block;background:rgba(255,255,255,.04);backdrop-filter:blur(8px)}
  .mt .fm sub{font-size:.62em;font-style:normal}
  .mt .rd{margin-top:20px;color:#A1A1A6;font-size:1.02rem;line-height:1.5}
  .mt .rd b{display:inline-block;color:#fff;font-weight:700;font-variant-numeric:tabular-nums;background:linear-gradient(90deg,#fff,var(--orange-2));-webkit-background-clip:text;background-clip:text;color:transparent}
  .mech-view{position:relative;width:100%;height:100%;max-height:640px;min-height:260px}
  .mech-view canvas{position:absolute;inset:0;width:100%;height:100%}
  .mech-tabs{position:relative;list-style:none;display:flex;justify-content:center;gap:10px;margin:14px auto 0;padding:0}
  .mech-tabs li{font-size:.82rem;font-weight:600;padding:7px 14px;border-radius:99px;color:#8E8E93;border:1px solid rgba(255,255,255,.1);transition:color .3s,background .3s,border-color .3s}
  .mech-tabs li.on{color:#fff;background:rgba(238,90,0,.22);border-color:rgba(255,154,60,.6)}
  @media (max-width:900px){
    .mech{height:240vh}
    .mech-stage{padding:70px 18px 18px}
    .mech-grid{grid-template-columns:1fr;grid-template-rows:auto minmax(0,1fr);align-items:start;gap:14px}
    .mt h2{font-size:clamp(1.7rem,8vw,2.3rem);margin-bottom:14px}
    .mt .kick{margin-bottom:10px}
    .mt .fm{font-size:1.15rem;padding:9px 14px}
    .mt .rd{margin-top:12px;font-size:.95rem}
    .mech-view{min-height:0}
  }

  /* Как проходит */
  .process{background:var(--soft)}
  .steps{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:28px;margin-top:64px;counter-reset:s;position:relative}
  .steps::before{content:"";position:absolute;left:24px;right:24px;top:24px;border-top:2px solid var(--line)}
  .steps::after{content:"";position:absolute;left:24px;right:24px;top:24px;border-top:2px solid var(--orange);transform-origin:left;transform:scaleX(var(--sp,0))}
  .steps li{position:relative;counter-increment:s}
  .steps li::before{content:counter(s);display:grid;place-items:center;width:48px;height:48px;border-radius:50%;background:#fff;border:2px solid var(--orange);color:var(--orange-deep);font-weight:700;font-size:1.05rem;position:relative;z-index:1;
    transition:transform .6s cubic-bezier(.3,1.6,.5,1),opacity .4s;transition-delay:calc(var(--rd,0s) + .15s)}
  .js .steps li.rv::before{transform:scale(.3);opacity:0}
  .js .steps li.rv.in::before{transform:none;opacity:1}
  .steps h3{font-size:1.15rem;margin:22px 0 8px;line-height:1.25;letter-spacing:-.02em}
  .steps p{color:var(--muted);font-size:1rem}

  /* Процесс: тёмный, продолжает сцену с книгой */
  .process{background:var(--night);color:#F5F5F7}
  .process h2{color:#fff}
  .process .lede{color:#A1A1A6}
  .process .steps::before{border-top-color:rgba(255,255,255,.14)}
  .process .steps li::before{background:var(--night);color:var(--orange-2)}
  .process .steps h3{color:#fff}
  .process .steps p{color:#A1A1A6}

  /* Цены */
  .pricing{background:#0B0B0D;color:#F5F5F7;border-top:1px solid rgba(255,255,255,.06)}
  .pricing h2{color:#fff}
  .pricing .lede{color:#A1A1A6}
  .subj-list{list-style:none;margin-top:64px;border-top:1px solid rgba(255,255,255,.14)}
  .subj{border-bottom:1px solid rgba(255,255,255,.14)}
  .subj-head{width:100%;display:grid;grid-template-columns:1fr auto 28px;align-items:center;gap:24px;padding:28px 0;background:none;border:0;text-align:left;cursor:pointer;color:#fff}
  .subj-name{font-size:clamp(1.25rem,2.6vw,1.9rem);font-weight:600;letter-spacing:-.03em;line-height:1.15;transition:color .2s,translate .3s cubic-bezier(.2,.8,.2,1)}
  .subj-price{display:flex;align-items:baseline;gap:8px;white-space:nowrap}
  .subj-price b{font-size:clamp(1.25rem,2.4vw,1.7rem);font-weight:700;letter-spacing:-.03em;background:linear-gradient(90deg,#fff,var(--orange-2));-webkit-background-clip:text;background-clip:text;color:transparent}
  .subj-price small{font-size:.9rem;color:#A1A1A6}
  .chev{width:10px;height:10px;display:block;justify-self:end;border-right:2.5px solid var(--orange-2);border-bottom:2.5px solid var(--orange-2);transform:rotate(45deg) translateY(-3px);transition:transform .3s}
  .subj.open .chev{transform:rotate(-135deg) translateY(-3px)}
  @media (hover:hover){.subj-head:hover .subj-name{color:var(--orange-2);translate:6px 0}}
  .subj-panel{display:grid;grid-template-rows:0fr;transition:grid-template-rows .4s cubic-bezier(.2,.8,.2,1)}
  .subj.open .subj-panel{grid-template-rows:1fr}
  .subj-inner{overflow:hidden;min-height:0}
  .subj-body{display:grid;grid-template-columns:auto 1fr auto;gap:32px;align-items:center;padding:4px 0 32px}
  .subj-body fieldset{border:0}
  .subj-body legend{font-weight:600;margin-bottom:10px;color:#fff}
  .subj-total .sum{font-weight:700;font-size:2rem;letter-spacing:-.04em;line-height:1.1;color:#fff}
  .subj-total .sub{color:#A1A1A6;font-size:.95rem;margin-top:4px}
  .chips{display:flex;flex-wrap:wrap;gap:8px}
  .chips input{position:absolute;opacity:0;pointer-events:none}
  .chips label{padding:10px 18px;border:1px solid rgba(255,255,255,.25);border-radius:999px;cursor:pointer;font-weight:500;transition:background .15s,border-color .15s,color .15s,transform .15s}
  .chips label:active{transform:scale(.95)}
  .chips input:checked+label{background:var(--orange);border-color:var(--orange);color:#fff}
  .chips input:focus-visible+label{outline:3px solid #fff;outline-offset:3px}
  .group-row{margin-top:36px}
  .linkbtn{background:none;border:0;cursor:pointer;color:var(--orange-2);font-weight:600;font-size:1.05rem;padding:0;display:inline-flex;gap:6px;align-items:center;transition:color .2s}
  .linkbtn:hover{color:#FFB877;text-decoration:underline;text-underline-offset:4px}
  .group-note{margin-top:12px;color:#A1A1A6;max-width:56ch}

  /* Вопросы */
  .faq-list{margin-top:48px;max-width:800px}
  details{border-bottom:1px solid var(--line);interpolate-size:allow-keywords}
  details:first-child{border-top:1px solid var(--line)}
  summary{list-style:none;cursor:pointer;padding:24px 44px 24px 0;font-weight:600;font-size:1.15rem;letter-spacing:-.015em;position:relative}
  summary::-webkit-details-marker{display:none}
  summary::after{content:"";position:absolute;right:6px;top:50%;width:10px;height:10px;border-right:2.5px solid var(--orange);border-bottom:2.5px solid var(--orange);transform:translateY(-70%) rotate(45deg);transition:transform .25s}
  details[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
  details p{padding:0 44px 26px 0;color:var(--muted);max-width:62ch}
  details::details-content{height:0;overflow:hidden;opacity:0;transition:height .35s ease,opacity .35s ease,content-visibility .35s allow-discrete}
  details[open]::details-content{height:auto;opacity:1}

  /* Заявка */
  .signup{background:var(--soft)}
  .signup .wrap{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:start}
  .contacts{margin-top:40px;display:grid;gap:16px}
  .contacts div{display:grid;grid-template-columns:110px 1fr;gap:12px}
  .contacts dt{color:var(--muted)}
  .contacts dd{font-weight:600}
  form{background:#fff;border-radius:28px;padding:36px;display:grid;gap:18px;box-shadow:0 30px 60px -36px rgba(0,0,0,.25)}
  .field{display:grid;gap:6px}
  .field label{font-weight:600;font-size:.92rem}
  .field input,.field select,.field textarea{padding:14px 16px;border:1px solid #D2D2D7;border-radius:14px;background:#fff;width:100%;transition:border-color .2s,box-shadow .2s}
  .field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--orange);box-shadow:0 0 0 4px rgba(238,90,0,.15)}
  .field textarea{resize:vertical;min-height:88px}
  .row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
  .err{color:#C62828;font-size:.88rem;min-height:1.2em}
  .fine{font-size:.85rem;color:var(--muted)}
  .done{background:#fff;border-radius:28px;padding:40px;display:none;box-shadow:0 30px 60px -36px rgba(0,0,0,.25)}
  .done h3{font-size:1.5rem}
  .done p{margin-top:12px;color:var(--muted)}
  .done .btn{margin-top:24px}
  .okmark{width:56px;height:56px;margin-bottom:16px}
  .okmark circle,.okmark path{fill:none;stroke:var(--orange);stroke-width:3.4;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:1;stroke-dashoffset:1}
  .done.show{animation:panelIn .6s cubic-bezier(.2,.8,.2,1)}
  .done.show .okmark circle{animation:draw .6s ease-out forwards}
  .done.show .okmark path{animation:draw .5s .45s ease-out forwards}
  @keyframes panelIn{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}

  footer.site{background:#000;color:#A1A1A6;padding:40px 0 100px;font-size:.92rem}
  footer.site .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px}
  footer.site .logo{color:#fff;font-size:1.1rem}

  /* Липкая кнопка на телефоне */
  .sticky{display:none;transform:translateY(110%);transition:transform .4s cubic-bezier(.2,.8,.2,1)}
  .sticky.show{transform:none}

  @media (max-width:900px){
    section{padding:80px 0}
    .top nav{display:none}
    .hero{padding:56px 0 130px}
    .hero .wrap,.signup .wrap{grid-template-columns:1fr;gap:48px}
    .book-stage{--W:min(44vw,40vh)}
    .book-scene{height:450vh}
    .book-cta{display:none}
    .book-progress{bottom:88px}
    .steps{grid-template-columns:1fr 1fr}
    .steps::before,.steps::after{display:none}
    .subj-list{margin-top:48px}
    .subj-head{grid-template-columns:1fr 24px;gap:6px 16px;padding:24px 0}
    .subj-price{grid-column:1;grid-row:2}
    .chev{grid-column:2;grid-row:1 / span 2}
    .subj-body{grid-template-columns:1fr;gap:22px}
    .sticky{display:block;position:fixed;left:0;right:0;bottom:0;z-index:55;padding:12px 20px calc(12px + env(safe-area-inset-bottom));background:rgba(18,18,20,.82);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-top:1px solid rgba(255,255,255,.1)}
    .sticky .btn{width:100%}
  }
  @media (max-width:560px){
    .blob{filter:blur(46px) saturate(155%)}
    .b1{opacity:.78}
    .b2{opacity:.52}
    .b3{opacity:.38}
    body{font-size:16px}
    .lede{font-size:1.1rem}
    .sheet{padding:24px 20px 28px}
    .ln{font-size:1.2rem}
    .ln.sm{font-size:1rem}
    .row{grid-template-columns:1fr}
    .steps{grid-template-columns:1fr}
    form{padding:24px 20px}
    .done{padding:28px 22px}
  }
  @media (prefers-reduced-motion:reduce) and (min-width:99999px){
    html{scroll-behavior:auto}
    .book-scene{height:auto}
    .book-stage{position:relative;height:100vh;height:100svh}
    .js .rv{opacity:1;transform:none;transition:none}
    .w>span{animation:none;transform:none}
    .sym-layer span,.cue i,.blob{animation:none}
    .ln{animation:none;clip-path:none}
    .circled path{animation:none;stroke-dashoffset:0}
    .note{animation:none;opacity:1}
    .done.show{animation:none}
    .btn::after{display:none}
    .okmark circle,.okmark path{stroke-dashoffset:0;animation:none !important}
  }