:root{--ebook-ink:#12213d;--ebook-muted:#60708a;--ebook-blue:#315de8;--ebook-soft:#f2f6ff;--ebook-border:#e1e8f2}
.ebook-page{color:var(--ebook-ink);padding-bottom:80px}.ebook-wrap{width:min(1160px,calc(100% - 40px));margin:auto}.ebook-hero{padding:66px 0 72px;background:radial-gradient(ellipse at 82% 18%,#dce7ff 0,transparent 34%),linear-gradient(135deg,#f7f9ff,#edf3ff)}.ebook-crumb{font-size:14px;color:var(--ebook-muted);margin-bottom:36px}.ebook-crumb a{color:inherit;text-decoration:none}.ebook-crumb span{margin:0 9px}.ebook-hero-grid{display:grid;grid-template-columns:1.12fr .88fr;align-items:center;gap:58px}.ebook-kicker{display:inline-flex;gap:8px;align-items:center;color:var(--ebook-blue);font-weight:700;font-size:13px;letter-spacing:.08em;text-transform:uppercase}.ebook-page h1{font-size:clamp(40px,5vw,65px);line-height:1.04;letter-spacing:-.045em;margin:16px 0 20px;color:var(--ebook-ink)}.ebook-lead{color:var(--ebook-muted);font-size:19px;line-height:1.65;max-width:650px}.ebook-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}.ebook-btn{display:inline-flex;align-items:center;justify-content:center;padding:14px 20px;border-radius:9px;font-weight:700;text-decoration:none;transition:.2s}.ebook-btn:hover{transform:translateY(-2px)}.ebook-btn-primary{background:var(--ebook-blue);color:white;box-shadow:0 9px 22px #315de833}.ebook-btn-outline{color:var(--ebook-ink);border:1px solid #cdd8e8;background:white}.ebook-cover-stack{min-height:340px;position:relative;display:flex;align-items:center;justify-content:center}.ebook-cover{width:222px;min-height:296px;padding:25px 22px;border-radius:7px 14px 14px 7px;color:white;background:linear-gradient(155deg,#102346,#315de8);box-shadow:15px 18px 40px #12213d30;position:relative;display:flex;flex-direction:column;justify-content:space-between;overflow:hidden}.ebook-cover:before{content:"";position:absolute;inset:0 auto 0 10px;width:1px;background:#ffffff35}.ebook-cover:after{content:"";position:absolute;width:240px;height:240px;right:-140px;top:42px;border:1px solid #ffffff35;border-radius:50%;box-shadow:0 0 0 22px #ffffff0d,0 0 0 44px #ffffff0a}.ebook-cover-label{font-size:10px;letter-spacing:.15em;text-transform:uppercase;opacity:.8}.ebook-cover-title{font-size:26px;line-height:1.08;font-weight:800;position:relative;z-index:1}.ebook-cover-foot{font-size:11px;opacity:.8}.ebook-cover.cover-cyber{background:linear-gradient(150deg,#0c2337,#087d9b)}.ebook-cover.cover-data{background:linear-gradient(150deg,#222054,#7464e9)}.ebook-cover.cover-ai{background:linear-gradient(150deg,#3b1e68,#c353bb)}.ebook-cover.cover-back{position:absolute;transform:translate(115px,10px) rotate(9deg);background:linear-gradient(150deg,#234b87,#57a5e6);opacity:.82}.ebook-cover.cover-front{transform:rotate(-6deg);z-index:1}.ebook-section{padding:76px 0}.ebook-section-soft{background:#f7f9fc}.ebook-section-head{text-align:center;max-width:700px;margin:0 auto 38px}.ebook-section-head h2{font-size:clamp(29px,3vw,42px);letter-spacing:-.035em;margin:0 0 12px}.ebook-section-head p{color:var(--ebook-muted);line-height:1.65;margin:0}.ebook-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.ebook-card{background:white;border:1px solid var(--ebook-border);border-radius:16px;padding:25px;display:flex;flex-direction:column;box-shadow:0 10px 30px #142b4a08}.ebook-card-top{display:flex;align-items:center;gap:15px;margin-bottom:17px}.ebook-card .ebook-cover{width:67px;min-height:88px;padding:9px;border-radius:3px 6px 6px 3px;box-shadow:4px 5px 10px #12213d24}.ebook-card .ebook-cover-title{font-size:9px}.ebook-card .ebook-cover-label,.ebook-card .ebook-cover-foot{font-size:5px}.ebook-card h3{font-size:20px;margin:0 0 6px}.ebook-card p{color:var(--ebook-muted);line-height:1.6;margin:0 0 20px}.ebook-card-meta{font-size:13px;color:var(--ebook-muted)}.ebook-card-bottom{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:17px;border-top:1px solid var(--ebook-border)}.ebook-price{font-size:20px;font-weight:800}.ebook-price small{display:block;font-size:12px;font-weight:500;color:var(--ebook-muted)}.ebook-card-link{color:var(--ebook-blue);font-weight:700;text-decoration:none}.ebook-bundle{display:grid;grid-template-columns:1fr auto;align-items:center;gap:24px;background:var(--ebook-ink);color:white;padding:30px 34px;border-radius:17px;margin-top:26px}.ebook-bundle h3{font-size:23px;margin:0 0 8px;color:white}.ebook-bundle p{color:#c4cee0;margin:0;line-height:1.55}.ebook-bundle-price{text-align:right;font-size:24px;font-weight:800}.ebook-bundle-price del{display:block;color:#a9b5ca;font-size:14px;font-weight:500}.ebook-bundle .ebook-btn{margin-top:11px;background:white;color:var(--ebook-ink)}.ebook-feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.ebook-feature{padding:22px;border:1px solid var(--ebook-border);border-radius:13px;background:white}.ebook-feature b{display:block;font-size:16px;margin-bottom:8px}.ebook-feature p{color:var(--ebook-muted);line-height:1.6;margin:0}.ebook-detail-grid{display:grid;grid-template-columns:1fr .75fr;gap:48px;align-items:start}.ebook-purchase{position:sticky;top:30px;background:white;border:1px solid var(--ebook-border);padding:26px;border-radius:16px;box-shadow:0 15px 40px #142b4a0d}.ebook-purchase h2{margin:0 0 6px;font-size:23px}.ebook-purchase p{color:var(--ebook-muted);line-height:1.55}.ebook-purchase .ebook-price{font-size:34px;margin:19px 0}.ebook-ticklist{padding:0;list-style:none;display:grid;gap:12px;margin:22px 0}.ebook-ticklist li:before{content:"✓";color:#138b64;font-weight:800;margin-right:10px}.ebook-content-list{display:grid;gap:13px}.ebook-content-item{display:flex;gap:14px;align-items:flex-start;padding:18px;border:1px solid var(--ebook-border);border-radius:12px}.ebook-content-num{width:34px;height:34px;display:grid;place-items:center;background:var(--ebook-soft);color:var(--ebook-blue);border-radius:9px;font-weight:800;flex:none}.ebook-content-item h3{font-size:17px;margin:0 0 5px}.ebook-content-item p{font-size:14px;color:var(--ebook-muted);line-height:1.5;margin:0}.ebook-faq{max-width:830px;margin:auto}.ebook-faq details{border-bottom:1px solid var(--ebook-border);padding:19px 0}.ebook-faq summary{font-weight:700;cursor:pointer}.ebook-faq details p{color:var(--ebook-muted);line-height:1.65;margin:12px 0 0}.ebook-thanks{min-height:52vh;display:grid;place-items:center;text-align:center;background:linear-gradient(145deg,#f5f8ff,#e9f2ff);padding:60px 20px}.ebook-thanks-card{max-width:650px;background:white;border:1px solid var(--ebook-border);border-radius:20px;padding:50px 42px;box-shadow:0 18px 55px #12213d14}.ebook-thanks-icon{width:62px;height:62px;margin:0 auto 18px;border-radius:50%;background:#e3f7ef;color:#16855e;display:grid;place-items:center;font-size:30px}.ebook-thanks-card p{color:var(--ebook-muted);line-height:1.65}.ebook-trust{font-size:13px;color:var(--ebook-muted);margin-top:18px}.ebook-notice{background:#fff8e8;border:1px solid #f2dfa9;border-radius:10px;color:#775d16;padding:13px 15px;font-size:13px;line-height:1.55;margin-top:16px}
@media(max-width:850px){.ebook-hero-grid,.ebook-detail-grid{grid-template-columns:1fr;gap:30px}.ebook-cover-stack{min-height:280px}.ebook-grid{grid-template-columns:repeat(2,1fr)}.ebook-feature-grid{grid-template-columns:1fr}.ebook-purchase{position:static}.ebook-bundle{grid-template-columns:1fr}.ebook-bundle-price{text-align:left}}
@media(max-width:560px){.ebook-wrap{width:min(100% - 30px,1160px)}.ebook-hero{padding:40px 0 48px}.ebook-page h1{font-size:42px}.ebook-lead{font-size:17px}.ebook-section{padding:54px 0}.ebook-grid{grid-template-columns:1fr}.ebook-cover-stack{min-height:245px}.ebook-cover{width:185px;min-height:250px}.ebook-cover.cover-back{transform:translate(82px,10px) rotate(9deg)}.ebook-bundle{padding:24px}.ebook-thanks-card{padding:35px 23px}}