:root{--paper:#f5f0e8;--paper-deep:#ebe2d5;--ink:#16211d;--ink-soft:#42504a;--accent:#d94f32;--accent-dark:#9f351f;--line:#c9beb0;--white:#fffdf8;--max:1180px;--narrow:820px;--serif:Georgia, "Noto Serif SC", "Songti SC", serif;--sans:Inter, "Noto Sans SC", "Microsoft YaHei", sans-serif}*{box-sizing:border-box}html{color-scheme:light;scroll-behavior:smooth}body{background:var(--paper);min-width:320px;color:var(--ink);font-family:var(--sans);text-rendering:optimizelegibility;margin:0;font-size:17px;line-height:1.75;overflow-x:hidden}a{color:inherit;text-underline-offset:.2em}a:hover{color:var(--accent-dark)}button,a{-webkit-tap-highlight-color:transparent}:focus-visible{outline:3px solid var(--accent);outline-offset:4px}h1,h2,h3,p{margin-top:0}h1,h2,h3{font-family:var(--serif);letter-spacing:-.025em;font-weight:600;line-height:1.16}h1{font-size:clamp(3rem,7vw,6.7rem)}h2{font-size:clamp(2rem,4.6vw,4.2rem)}h3{font-size:1.35rem}img,svg{max-width:100%;display:block}.shell{width:min(calc(100% - 40px), var(--max));margin-inline:auto}.narrow{width:min(calc(100% - 40px), var(--narrow))}.skip-link{z-index:50;background:var(--ink);color:var(--white);padding:10px 16px;position:fixed;top:12px;left:12px;transform:translateY(-180%)}.skip-link:focus{transform:none}.site-header{border-bottom:1px solid var(--line)}.header-inner{justify-content:space-between;align-items:center;gap:28px;min-height:78px;display:flex}.brand{letter-spacing:-.02em;align-items:center;gap:12px;font-weight:750;text-decoration:none;display:inline-flex}.brand-mark{background:var(--ink);width:32px;height:32px;color:var(--paper);font-family:var(--serif);place-items:center;font-size:1.15rem;display:grid}.nav-list,.footer-links,.plain-list{margin:0;padding:0;list-style:none}.nav-list{flex-wrap:wrap;justify-content:flex-end;gap:8px 24px;font-size:.93rem;display:flex}.nav-list a{text-decoration:none}.eyebrow{color:var(--accent-dark);letter-spacing:.16em;text-transform:uppercase;margin-bottom:16px;font-size:.74rem;font-weight:800;line-height:1.4}.hero{grid-template-columns:minmax(0,1.35fr) minmax(300px,.65fr);align-items:center;gap:clamp(50px,8vw,120px);min-height:760px;padding-block:70px 90px;display:grid}.hero h1{max-width:820px;margin-bottom:12px}.hero-en{color:var(--accent-dark);font-family:var(--serif);margin-bottom:28px;font-size:clamp(1rem,2vw,1.35rem);font-style:italic}.hero-lead{max-width:690px;color:var(--ink-soft);font-size:clamp(1.08rem,2vw,1.3rem)}.hero-actions,.page-actions{flex-wrap:wrap;align-items:center;gap:18px 26px;margin-top:34px;display:flex}.button{border:1px solid var(--ink);min-height:52px;font:inherit;cursor:pointer;justify-content:center;align-items:center;padding:12px 22px;font-size:.94rem;font-weight:760;text-decoration:none;display:inline-flex}.button.primary{background:var(--ink);color:var(--white)}.button.primary:hover{background:var(--accent-dark);border-color:var(--accent-dark);color:var(--white)}.button.secondary{color:var(--ink);background:0 0}.button.disabled{color:#665f57;cursor:not-allowed;background:#ddd5ca;border-color:#a89f93}.text-link{border-bottom:1px solid;font-weight:720;text-decoration:none}.hero-facts{border-top:1px solid var(--line);grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;margin:54px 0 0;padding-top:20px;display:grid}.hero-facts div{min-width:0}.hero-facts dt{color:var(--ink-soft);text-transform:uppercase;letter-spacing:.1em;font-size:.75rem}.hero-facts dd{margin:3px 0 0;font-weight:700;line-height:1.45}.cover-wrap{perspective:1200px}.book-cover{aspect-ratio:.707;background:var(--ink);color:var(--paper);flex-direction:column;padding:clamp(28px,4vw,48px);display:flex;position:relative;overflow:hidden;transform:rotateY(-3deg)rotate(1deg);box-shadow:22px 28px #d8cdc0}.cover-kicker,.cover-meta,.cover-subtitle{letter-spacing:.13em;font-size:.68rem;line-height:1.6}.cover-rule{background:var(--accent);width:56px;height:5px;margin:42px 0 36px}.book-cover strong{font-family:var(--serif);font-size:clamp(2rem,4vw,3.6rem);font-weight:500;line-height:1.12}.cover-subtitle{color:#cfc8bc;margin-top:22px}.cover-layers{gap:8px;margin:auto 0 28px;display:grid}.cover-layers i{background:var(--accent);height:4px;display:block}.cover-layers i:nth-child(2){width:86%}.cover-layers i:nth-child(3){width:70%}.cover-layers i:nth-child(4){width:54%}.cover-layers i:nth-child(5){width:38%}.section{padding-block:clamp(80px,11vw,150px)}.rule-top{border-top:1px solid var(--line)}.section-heading{grid-template-columns:80px minmax(0,1fr);gap:18px;max-width:980px;margin-bottom:60px;display:grid}.section-heading h2{margin-bottom:20px}.section-number{color:var(--accent-dark);font-family:var(--serif);font-size:1.1rem}.section-lead{max-width:760px;color:var(--ink-soft);font-size:1.1rem}.problem-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:36px 70px;padding-left:98px;display:grid}.problem-grid blockquote{border-top:1px solid var(--line);font-family:var(--serif);grid-column:1/-1;margin:15px 0 0;padding:26px 0 0;font-size:clamp(1.5rem,3vw,2.4rem);line-height:1.35}.ink-section{background:var(--ink);color:var(--paper)}.ink-section .section-lead{color:#c9cec9}.ink-section .eyebrow,.ink-section .section-number{color:#ff8061}.layer-model{border-top:1px solid #627069}.layer-row{border-bottom:1px solid #627069;grid-template-columns:90px 170px minmax(0,1fr);align-items:center;gap:20px;min-height:92px;display:grid}.layer-row strong{font-family:var(--serif);font-size:1.8rem}.layer-number{color:#ff8061;letter-spacing:.14em;font-size:.8rem}.layer-row>span:last-child{color:#c9cec9}.chapter-list{border-top:1px solid var(--line);margin:0;padding:0;list-style:none}.chapter-list li{border-bottom:1px solid var(--line);grid-template-columns:90px minmax(0,1fr);align-items:center;min-height:84px;display:grid}.chapter-list span{color:var(--accent-dark);letter-spacing:.12em;font-size:.8rem}.chapter-list strong{font-family:var(--serif);font-size:clamp(1.25rem,2vw,1.7rem)}.sample-band{background:var(--accent);color:var(--white)}.sample-band .eyebrow{color:#fff1e8}.sample-band .button.secondary{border-color:var(--white);color:var(--white)}.split-layout{grid-template-columns:repeat(2,minmax(0,1fr));align-items:start;gap:clamp(50px,9vw,120px);display:grid}.sample-index{border-top:1px solid #ffffff8c;display:grid}.sample-index span{border-bottom:1px solid #ffffff8c;padding:15px 0}.deliverables{border-block:1px solid var(--line);grid-template-columns:repeat(3,minmax(0,1fr));gap:0;display:grid}.deliverables article{border-right:1px solid var(--line);padding:38px}.deliverables article:last-child{border-right:0}.deliverables article>span{color:var(--accent-dark);letter-spacing:.14em;font-size:.72rem;font-weight:800}.pricing-layout,.purchase-layout{grid-template-columns:minmax(0,1.25fr) minmax(320px,.75fr);align-items:start;gap:clamp(50px,8vw,110px);display:grid}.statement-list{border-top:1px solid var(--line);margin:0;padding:0;list-style:none}.statement-list li{border-bottom:1px solid var(--line);grid-template-columns:160px minmax(0,1fr);gap:20px;padding:19px 0;display:grid}.purchase-panel{border:1px solid var(--ink);background:var(--white);box-shadow:12px 12px 0 var(--paper-deep);padding:38px}.purchase-panel h2{margin:28px 0 12px;font-size:2rem}.purchase-panel .button{width:100%;margin-top:18px}.price-line{flex-wrap:wrap;align-items:baseline;gap:10px;display:flex}.price{font-family:var(--serif);font-size:3.8rem;line-height:1}.purchase-facts{color:var(--ink-soft);gap:8px;margin-top:28px;font-size:.92rem;display:grid}.purchase-facts li:before{content:"— ";color:var(--accent)}.author-section{background:var(--paper-deep)}.author-section h2{font-size:clamp(2rem,4vw,3.8rem)}.english-summary{text-align:center}.english-summary h2,.english-summary p{max-width:900px;margin-inline:auto}.english-summary>p:last-child{color:var(--ink-soft);font-family:var(--serif);font-size:1.25rem}.faq-list{border-top:1px solid var(--line)}.faq-list details{border-bottom:1px solid var(--line);padding:24px 0}.faq-list summary{cursor:pointer;font-family:var(--serif);font-size:1.25rem;font-weight:650}.faq-list details p{max-width:760px;color:var(--ink-soft);margin:15px 0 0}.page-hero{padding-block:clamp(90px,14vw,170px) 80px}.page-hero h1,.not-found h1{margin-bottom:24px;font-size:clamp(3rem,7vw,5.8rem)}.page-hero>p:last-child,.not-found>p{max-width:720px;color:var(--ink-soft);font-size:1.14rem}.page-actions>span{color:var(--ink-soft);font-size:.9rem}.sample-chapters li{min-height:74px}.honesty-note,.status-notice,.legal-callout{border-left:5px solid var(--accent);background:var(--paper-deep);margin-top:44px;padding:24px 28px}.honesty-note p,.status-notice p{margin:6px 0 0}.purchase-layout .purchase-panel{grid-area:1/2}.purchase-layout>div{grid-area:1/1}.policy-facts{border-top:1px solid var(--line);margin:28px 0 0}.policy-facts div{border-bottom:1px solid var(--line);grid-template-columns:150px minmax(0,1fr);gap:24px;padding:16px 0;display:grid}.policy-facts dt{color:var(--ink-soft)}.policy-facts dd{margin:0;font-weight:650}.legal-page{padding-block:clamp(90px,13vw,150px)}.legal-page h1{margin-bottom:12px;font-size:clamp(3rem,7vw,5.8rem)}.legal-page h2{margin:58px 0 16px;font-size:clamp(1.5rem,3vw,2.2rem)}.legal-page p,.legal-page li{color:#29342f}.legal-meta{font-size:.9rem;color:var(--ink-soft)!important}.legal-callout{margin-bottom:50px}.legal-disclaimer{border-top:1px solid var(--line);margin-top:60px;padding-top:24px;font-size:.9rem}.contact-sheet .button{margin-top:38px}.muted{color:var(--ink-soft)}.contact-sheet>.muted{margin-top:26px;font-size:.9rem}.not-found{flex-direction:column;justify-content:center;min-height:70vh;padding-block:100px;display:flex}.site-footer{border-top:1px solid var(--line);padding-block:70px 30px}.footer-grid{grid-template-columns:2fr 1fr 1fr;gap:50px;display:grid}.footer-brand{font-family:var(--serif);margin-bottom:10px;font-size:2rem;font-weight:650}.footer-heading{margin-bottom:14px;font-weight:750}.footer-links{gap:8px;display:grid}.footer-bottom{border-top:1px solid var(--line);color:var(--ink-soft);justify-content:space-between;gap:20px;margin-top:60px;padding-top:20px;font-size:.82rem;display:flex}@media (width<=900px){.hero,.pricing-layout,.purchase-layout{grid-template-columns:1fr}.hero{min-height:auto}.cover-wrap{width:min(480px,86%);margin-inline:auto}.purchase-layout .purchase-panel,.purchase-layout>div{grid-area:auto/1}.purchase-layout>div{grid-row:1}.hero-facts{grid-template-columns:repeat(2,1fr)}}@media (width<=700px){body{font-size:16px}.shell,.narrow{width:min(calc(100% - 28px), var(--max))}.header-inner{flex-direction:column;align-items:flex-start;padding-block:16px}.nav-list{justify-content:flex-start;gap:6px 18px}.hero{padding-block:54px 80px}.hero h1{font-size:clamp(2.75rem,15vw,4.4rem)}.hero-facts,.split-layout,.problem-grid,.deliverables,.footer-grid{grid-template-columns:1fr}.problem-grid{padding-left:0}.problem-grid blockquote{grid-column:1}.section-heading{grid-template-columns:1fr;gap:8px}.layer-row{grid-template-columns:48px 78px minmax(0,1fr);gap:10px;min-height:104px}.layer-row strong{font-size:1.35rem}.layer-row>span:last-child{font-size:.9rem;line-height:1.5}.chapter-list li{grid-template-columns:48px minmax(0,1fr);gap:8px}.deliverables article{border-right:0;border-bottom:1px solid var(--line);padding:28px 0}.deliverables article:last-child{border-bottom:0}.statement-list li,.policy-facts div{grid-template-columns:1fr;gap:4px}.purchase-panel{padding:26px}.footer-bottom{flex-direction:column;align-items:flex-start}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}@media print{.site-header,.site-footer,.skip-link{display:none}}