:root{--ink:#141334;--ink-2:#1a1150;--plum:#2d1b69;--plum-soft:#7a3ea8;--gold:#ffb703;--gold-soft:#ffd166;--pink:#ff5d8f;--green:#12886a;--cream:#f8f7fd;--paper:#ffffff;--muted:#6b6690;--line:#e4e0f2;--radius:18px;--shell:1120px;--font:"IBM Plex Sans Thai",ui-sans-serif,system-ui,sans-serif}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--cream);color:var(--ink);font-family:var(--font);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font-family:inherit;cursor:pointer}:focus-visible{outline:3px solid var(--plum-soft);outline-offset:3px;border-radius:6px}@media (prefers-reduced-motion:reduce){*,:after,:before{animation:none!important;transition:none!important}}.shell{max-width:var(--shell);margin:0 auto;padding:0 24px}.site-header{position:-webkit-sticky;position:sticky;top:0;z-index:40;background:rgba(20,19,52,.94);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,.1)}.header-row{display:flex;align-items:center;justify-content:space-between;gap:16px;height:68px}.brand{display:flex;align-items:baseline;gap:10px;color:#fff}.brand-name{font-size:22px;font-weight:700;letter-spacing:-.01em}.brand-tag{font-size:13px;color:#a9a3d6}.header-nav{display:flex;align-items:center;gap:8px}.header-link{color:#d8d3f5;font-size:15px;padding:8px 12px;border-radius:10px}.header-link:hover{background:rgba(255,255,255,.1);color:#fff}.avatar{width:32px;height:32px;border-radius:50%;border:2px solid var(--gold-soft)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:12px;padding:13px 22px;font-size:16px;font-weight:600;transition:transform .12s ease,box-shadow .12s ease,background .12s 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rgba(0,0,0,.45);border:3px solid rgba(255,255,255,.22);background:var(--plum);aspect-ratio:1034/1462}.book-frame img{width:100%;height:100%;object-fit:cover;display:block}.section{padding:72px 0}.section-alt{background:var(--paper)}.section h2{font-size:clamp(26px,3vw,34px);margin:0 0 10px;letter-spacing:-.01em}.section-lead{color:var(--muted);font-size:17px;line-height:1.7;margin:0 0 32px;max-width:60ch}.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));grid-gap:20px;gap:20px}.feature{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:24px}.section-alt .feature{background:var(--cream)}.feature h3{margin:0 0 8px;font-size:18px}.feature p{margin:0;color:var(--muted);line-height:1.7;font-size:15.5px}.toc-row{display:grid;grid-template-columns:minmax(0,1.1fr) 92px minmax(0,1.4fr);grid-gap:16px;gap:16px;align-items:baseline;padding:16px 0;border-bottom:1px solid var(--line)}.toc-row:last-child{border-bottom:0}.toc-pages,.toc-part{font-weight:600}.toc-pages{color:var(--plum-soft);font-size:14.5px}.toc-detail{color:var(--muted);font-size:15px;line-height:1.6}.product-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column}.product-cover{aspect-ratio:1034/1462;background:linear-gradient(160deg,#2d1b69,#141334);position:relative}.product-cover img{width:100%;height:100%;object-fit:cover}.product-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1 1}.product-body h3{margin:0;font-size:19px;line-height:1.4}.product-body p{margin:0;color:var(--muted);font-size:15px;line-height:1.65;flex:1 1}.product-foot{display:flex;align-items:center;justify-content:space-between;gap:12px}.price{font-size:24px;font-weight:700;color:var(--plum)}.badge{display:inline-block;padding:5px 11px;border-radius:999px;font-size:13px;font-weight:600}.badge-owned{background:#e2f6ef;color:#0b6650}.badge-coming{background:#fff2d6;color:#a35a00}.tick-list{list-style:none;margin:0;padding:0;display:grid;grid-gap:12px;gap:12px}.tick-list li{position:relative;padding-left:34px;line-height:1.7;font-size:16px}.tick-list li:before{content:"";position:absolute;left:0;top:6px;width:20px;height:20px;border-radius:50%;background:var(--green)}.tick-list li:after{content:"";position:absolute;left:6px;top:12px;width:5px;height:9px;border:solid #fff;border-width:0 2.5px 2.5px 0;transform:rotate(45deg)}.buy-box{background:linear-gradient(160deg,#1f1461,#141334);color:#fff;border-radius:22px;padding:30px;position:-webkit-sticky;position:sticky;top:92px}.buy-price{font-size:42px;font-weight:700;color:var(--gold-soft);line-height:1.1}.buy-note{font-size:14.5px;color:#b9b3e0;line-height:1.7;margin:10px 0 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1fr;grid-gap:44px;gap:44px;align-items:start}@media (max-width:900px){.hero{padding:52px 0 60px}.hero-grid{grid-template-columns:1fr;gap:36px}.book-frame{max-width:300px;margin:0 auto}.detail-grid{grid-template-columns:1fr}.buy-box{position:static}.toc-row{grid-template-columns:1fr;gap:4px}.brand-tag{display:none}}