:root{
  --ink:#0f1a2b; --ink-2:#1d2b42; --paper:#f6f1e7; --paper-2:#efe7d6; --white:#fff;
  --red:#b8321f; --red-2:#9a2615; --gold:#c9a24a; --muted:#5b6475; --line:#e2d9c6;
  --serif:"Fraunces",Georgia,serif; --sans:"Inter",system-ui,-apple-system,sans-serif;
  --r:14px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{font-family:var(--sans);color:var(--ink);background:var(--white);line-height:1.6;font-size:17px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit}
.wrap{width:min(1160px,92vw);margin:0 auto}
h1,h2,h3,h4{font-family:var(--serif);line-height:1.15;letter-spacing:-.01em}
h1{font-size:clamp(2.2rem,4.6vw,3.6rem);font-weight:700}
h2{font-size:clamp(1.8rem,3.4vw,2.6rem);font-weight:600;margin-bottom:.6em}
h3{font-size:1.5rem;margin-bottom:.5em}
h4{font-size:1.2rem;margin-bottom:.4em}
h1 em,h2 em{font-style:italic;color:var(--red);font-weight:600}
.eyebrow{font-size:.78rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--red);margin-bottom:1rem}
.eyebrow--light{color:var(--gold)}
.lead{font-size:1.15rem;color:var(--ink-2);margin:1.4rem 0 2rem;max-width:36em}
.micro{font-size:.82rem;color:var(--muted);margin-top:.9rem}
.micro--center{text-align:center}
.note{font-size:.82rem;color:var(--muted);margin-top:1rem;max-width:60em}
.note--light{color:#9aa6ba}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.4em;padding:.95em 1.5em;border-radius:999px;font-weight:600;font-size:.98rem;text-decoration:none;border:2px solid transparent;cursor:pointer;white-space:nowrap;transition:transform .15s,background .15s,box-shadow .15s;font-family:var(--sans)}
.btn:hover{transform:translateY(-1px)}
.btn--primary{background:var(--red);color:#fff;box-shadow:0 8px 24px -10px rgba(184,50,31,.7)}
.btn--primary:hover{background:var(--red-2)}
.btn--ghost{border-color:var(--ink);color:var(--ink);background:transparent}
.btn--light{background:#fff;color:var(--ink)}
.btn--ghost-light{border-color:rgba(255,255,255,.5);color:#fff}
.btn--sm{padding:.55em 1.1em;font-size:.88rem}
.btn--block{width:100%}

/* nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav__inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:1rem}
.nav__brand{font-family:var(--serif);font-weight:600;text-decoration:none;display:flex;align-items:center;gap:.6rem}
.seal{display:inline-grid;place-items:center;width:28px;height:28px;background:var(--red);color:#fff;border-radius:4px;font-size:.9rem;font-family:serif}
.nav__links{display:flex;gap:1.6rem;font-size:.9rem}
.nav__links a{text-decoration:none;color:var(--muted)}
.nav__links a:hover{color:var(--ink)}

/* hero */
.hero{background:linear-gradient(180deg,#fff 0%,var(--paper) 100%);padding-top:4.5rem}
.hero__grid{display:grid;grid-template-columns:1.35fr 1fr;gap:3rem;align-items:center;padding-bottom:4rem}
.hero__ctas{display:flex;flex-wrap:wrap;gap:.8rem}
.hero__ctas--center{justify-content:center}
.hero__book{display:flex;justify-content:center;perspective:1400px}
.book3d{position:relative;width:300px;height:440px;transform:rotateY(-22deg) rotateX(4deg);transform-style:preserve-3d;transition:transform .6s}
.book3d:hover{transform:rotateY(-8deg) rotateX(2deg)}
.book3d__cover{position:absolute;inset:0;background:radial-gradient(120% 80% at 80% 0%,#25385a 0%,var(--ink) 60%);color:#fff;border-radius:4px 10px 10px 4px;padding:34px 30px;display:flex;flex-direction:column;box-shadow:30px 30px 60px -20px rgba(15,26,43,.55),inset 4px 0 0 rgba(255,255,255,.08)}
.book3d__cover::after{content:"";position:absolute;right:22px;top:22px;width:54px;height:54px;border:2px solid var(--red);border-radius:50%;opacity:.9}
.book3d__kicker{font-size:1.1rem;color:var(--gold);letter-spacing:.3em}
.book3d__title{font-family:var(--serif);font-size:2.55rem;font-weight:700;line-height:1.02;margin-top:auto}
.book3d__rule{display:block;width:60px;height:3px;background:var(--red);margin:20px 0 14px}
.book3d__sub{font-size:.78rem;color:#c3cbd8;line-height:1.45}
.book3d__author{margin-top:22px;font-size:.8rem;letter-spacing:.25em;text-transform:uppercase;color:var(--gold)}
.book3d__spine{position:absolute;left:0;top:0;width:36px;height:100%;background:#0a1220;transform:rotateY(-90deg) translateZ(18px) translateX(-18px);transform-origin:left}

.proof-strip{background:var(--ink);color:#fff}
.proof-strip__inner{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem;padding:1.6rem 0}
.proof-strip b{display:block;font-family:var(--serif);font-size:1.6rem;color:var(--gold)}
.proof-strip span{font-size:.82rem;color:#b8c1d0}

/* sections */
.section{padding:6rem 0}
.section--paper{background:var(--paper)}
.section--ink{background:var(--ink);color:#e8ecf3}
.section--ink h2{color:#fff}
.section--ink h2 em{color:var(--gold)}
.section--accent{background:linear-gradient(135deg,var(--red) 0%,#7d1d10 100%);color:#fff}
.section__lead{font-size:1.1rem;color:var(--muted);max-width:44em;margin-bottom:2.5rem}

/* ledger */
.ledger{display:grid;grid-template-columns:300px 1fr;grid-template-areas:"c t" "c v";gap:1.5rem 2.5rem;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:2rem;box-shadow:0 20px 50px -30px rgba(15,26,43,.35)}
.ledger__controls{grid-area:c;display:flex;flex-direction:column;gap:1.6rem}
.ledger__controls label{font-weight:600;font-size:.92rem;display:block}
.ledger__controls output{float:right;color:var(--red);font-family:var(--serif);font-size:1.1rem}
.ledger__controls input{width:100%;margin:.6rem 0 .3rem;accent-color:var(--red)}
.ledger__controls small{font-weight:400;color:var(--muted);font-size:.8rem}
.ledger__table{grid-area:t;width:100%;border-collapse:collapse;font-size:.95rem}
.ledger__table td{padding:.55rem .4rem;border-bottom:1px solid #f0ebe0}
.ledger__table td:last-child{text-align:right;font-variant-numeric:tabular-nums;font-weight:600;width:110px}
.ledger__table tr.sub td{font-weight:700;background:var(--paper);border-bottom:none}
.ledger__table tr.neg td:last-child{color:var(--red)}
.ledger__table .bar{display:block;height:6px;border-radius:3px;background:var(--red);opacity:.25;margin-top:4px;transition:width .3s}
.ledger__verdict{grid-area:v;border-radius:10px;padding:1.2rem 1.4rem;font-size:1.05rem;background:var(--ink);color:#fff}
.ledger__verdict b{font-family:var(--serif);font-size:1.7rem;display:block;color:var(--gold)}
.ledger__verdict.loss b{color:#ff8a74}

.story{display:grid;grid-template-columns:120px 1fr;gap:2rem;margin-top:4.5rem;padding-top:3rem;border-top:1px solid var(--line)}
.story__tag{font-family:var(--serif);font-size:.95rem;color:var(--red);border-top:3px solid var(--red);padding-top:.6rem;height:fit-content}
.story p{margin-bottom:1rem;max-width:44em;color:var(--ink-2)}
.story__punch{font-size:1.1rem;border-left:3px solid var(--gold);padding-left:1rem}
.link-arrow{font-weight:600;color:var(--red);text-decoration:none}

/* cards */
.cards{display:grid;gap:1.4rem;margin-top:2.5rem}
.cards--3{grid-template-columns:repeat(3,1fr)}
.card{background:var(--paper);border-radius:var(--r);padding:1.6rem;border:1px solid var(--line)}
.card h4{font-size:1.1rem}
.card p{font-size:.94rem;color:var(--muted)}

/* author */
.author{display:grid;grid-template-columns:1.2fr 1fr;gap:4rem;align-items:start}
.author>div>p{color:#b8c1d0;margin-bottom:1.5rem}
.timeline{list-style:none;counter-reset:t;margin:0 0 2rem}
.timeline li{counter-increment:t;position:relative;padding:0 0 1.3rem 3rem;color:#c9d1dd;font-size:.97rem}
.timeline li::before{content:counter(t,decimal-leading-zero);position:absolute;left:0;top:0;font-family:var(--serif);color:var(--gold);font-weight:700}
.timeline b{color:#fff}
.gallery{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.gallery img{border-radius:10px;box-shadow:0 20px 40px -20px rgba(0,0,0,.6)}
.gallery .note{grid-column:1/-1}

/* parts */
.parts{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem;margin-top:2rem}
.part{position:relative;background:#fff;border-radius:var(--r);padding:2rem 1.6rem 1.6rem;border:1px solid var(--line)}
.part__no{font-family:var(--serif);font-size:2.4rem;color:var(--red);font-weight:700;line-height:1}
.part h4{margin-top:.6rem}
.part p{font-size:.92rem;color:var(--muted);margin-bottom:1rem}
.part__ch{font-size:.75rem;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-2);font-weight:600}
.part--accent{background:var(--ink);color:#fff;border-color:var(--ink)}
.part--accent p{color:#b8c1d0}.part--accent .part__ch{color:var(--gold)}.part--accent .part__no{color:var(--gold)}

/* optin */
.optin{display:grid;grid-template-columns:1fr 1fr;gap:4rem;align-items:center}
.optin h2{color:#fff}
.checks{list-style:none}
.checks li{position:relative;padding-left:1.8rem;margin-bottom:.9rem}
.checks li::before{content:"✓";position:absolute;left:0;color:var(--gold);font-weight:700}
.checks--dark li{font-size:.93rem;color:var(--ink-2)}
.checks--dark li::before{color:var(--red)}
.optin__form{background:#fff;color:var(--ink);border-radius:var(--r);padding:2rem;display:grid;grid-template-columns:1fr 1fr;gap:1rem;box-shadow:0 30px 60px -25px rgba(0,0,0,.5)}
.field{grid-column:1/-1;display:flex;flex-direction:column;gap:.3rem}
.field--half{grid-column:span 1}
.field label{font-size:.8rem;font-weight:600;color:var(--ink-2)}
.field input,.field select{font:inherit;font-size:.95rem;padding:.7rem .8rem;border:1px solid #d6cfbf;border-radius:8px;background:#fff}
.field input:focus,.field select:focus{outline:2px solid var(--red);border-color:transparent}
.field input.invalid{border-color:var(--red);background:#fff5f3}
.optin__form .btn,.optin__form .micro,.form-msg{grid-column:1/-1}
.form-msg{font-size:.92rem;font-weight:600;color:#1f7a4a}
.form-msg.err{color:var(--red)}
.hp{position:absolute;left:-9999px}

/* offers */
.offers{align-items:stretch}
.offer{position:relative;display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:2rem 1.7rem}
.offer ul{margin:1rem 0 1.5rem;flex:1}
.offer__price{font-family:var(--serif);font-size:1.8rem;font-weight:700;color:var(--ink)}
.offer__price small{font-family:var(--sans);font-size:.85rem;font-weight:500;color:var(--muted)}
.offer--featured{border:2px solid var(--red);box-shadow:0 30px 60px -30px rgba(184,50,31,.5);transform:translateY(-8px)}
.offer__badge{position:absolute;top:-13px;left:1.7rem;background:var(--red);color:#fff;font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;padding:.3rem .8rem;border-radius:999px}
.fit{display:grid;grid-template-columns:1fr 1fr;gap:1.4rem;margin-top:2.5rem}
.fit>div{padding:1.4rem 1.6rem;border-radius:var(--r);background:var(--paper)}
.fit>div:last-child{background:#f4f4f4}
.fit h5{font-size:.8rem;letter-spacing:.12em;text-transform:uppercase;margin-bottom:.4rem}
.fit p{font-size:.93rem;color:var(--muted)}

/* faq */
.faq{max-width:780px}
.faq details{border-bottom:1px solid var(--line);padding:1.1rem 0}
.faq summary{cursor:pointer;font-weight:600;font-size:1.05rem;list-style:none;display:flex;justify-content:space-between}
.faq summary::after{content:"+";color:var(--red);font-size:1.4rem;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details p{margin-top:.7rem;color:var(--muted)}

.final{text-align:center}
.final__inner p{color:#b8c1d0;margin-bottom:2rem;font-size:1.15rem}

.footer{background:#0a1220;color:#8792a6;font-size:.85rem;padding:1.6rem 0}
.footer__inner{display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap}
.footer a{color:#c9d1dd}

.sticky-cta{display:none}

/* responsive */
@media (max-width:960px){
  .nav__links{display:none}
  .hero__grid,.author,.optin{grid-template-columns:1fr}
  .hero__grid>*{min-width:0}
  .hero__book{display:none}
  .hero{padding-top:2.5rem}
  .book3d__title{font-size:1.85rem}
  .book3d__sub{display:none}
  .proof-strip__inner{grid-template-columns:repeat(2,1fr)}
  .cards--3,.parts{grid-template-columns:1fr}
  .ledger{grid-template-columns:1fr;grid-template-areas:"c" "t" "v";padding:1.3rem}
  .story{grid-template-columns:1fr;gap:1rem}
  .fit{grid-template-columns:1fr}
  .offer--featured{transform:none}
  .section{padding:4rem 0}
  .sticky-cta{display:flex;gap:.5rem;position:fixed;left:0;right:0;bottom:0;z-index:60;padding:.7rem 4vw;background:#fff;border-top:1px solid var(--line);transform:translateY(110%);transition:transform .25s}
  .sticky-cta.show{transform:none}
  .sticky-cta .btn{flex:1}
  body{padding-bottom:64px}
}
@media (max-width:520px){
  .nav__brand{font-size:.9rem}
  .nav__cta{display:none}
  .nav__brand>span:last-child{max-width:9em;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .proof-strip b{font-size:1.25rem}
  .optin__form{grid-template-columns:1fr;padding:1.4rem}
  .field--half{grid-column:1/-1}
  .hero__ctas .btn{width:100%}
}

/* ---------- language switch ---------- */
.nav__right{display:flex;align-items:center;gap:.8rem}
.lang{display:inline-flex;border:1px solid var(--line);border-radius:999px;padding:3px;background:#fff}
.lang__btn{font:600 .78rem/1 var(--sans);border:0;background:transparent;color:var(--muted);padding:.45em .8em;border-radius:999px;cursor:pointer;transition:background .15s,color .15s}
.lang__btn[aria-pressed="true"]{background:var(--ink);color:#fff}
.lang__btn:focus-visible{outline:2px solid var(--red);outline-offset:2px}

/* ---------- Chinese typography ---------- */
html[lang="zh-CN"] body{font-family:"Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC","Apple Color Emoji","Segoe UI Emoji",sans-serif;line-height:1.75}
html[lang="zh-CN"] h1,html[lang="zh-CN"] h2,html[lang="zh-CN"] h3,html[lang="zh-CN"] h4,
html[lang="zh-CN"] .proof-strip b,html[lang="zh-CN"] .offer__price{font-family:"Fraunces","Noto Serif SC","Songti SC","STSong",serif;letter-spacing:.01em}
html[lang="zh-CN"] h1{font-size:clamp(2rem,4vw,3.1rem);line-height:1.25}
html[lang="zh-CN"] h2{line-height:1.3}
html[lang="zh-CN"] h1 em,html[lang="zh-CN"] h2 em,html[lang="zh-CN"] em{font-style:normal}
html[lang="zh-CN"] .eyebrow{letter-spacing:.08em}

/* ---------- Restraint section (Chapter 12) ---------- */
.restraint{background:radial-gradient(90% 70% at 85% 30%,#1f3150 0%,var(--ink) 55%,#08101d 100%);color:#d5dbe5;position:relative;overflow:hidden}
.restraint::before{content:"别买";position:absolute;right:-2vw;bottom:-6vw;font:700 28vw/1 "Noto Serif SC","Songti SC",serif;color:rgba(255,255,255,.025);pointer-events:none;letter-spacing:-.05em}
.restraint h2{color:#fff}
.restraint h2 em{color:#7fe08a}
.restraint .eyebrow{color:#7fe08a}
.restraint__grid{display:grid;grid-template-columns:1.05fr 340px .95fr;gap:3rem;align-items:center;position:relative}
.restraint__lead{font-size:1.08rem;color:#e6eaf1;margin-bottom:1.6rem}
.restraint__copy>p:last-child{color:#9fabbf;font-size:.95rem}
.restraint__quote{font-family:var(--serif);font-size:1.15rem;line-height:1.5;color:#fff;border-left:3px solid #7fe08a;padding:.2rem 0 .2rem 1.2rem;margin:0 0 1.6rem}
.restraint__quote cite{display:block;font:500 .8rem var(--sans);color:#8b97ab;margin-top:.6rem;font-style:normal}
.phone{margin:0;text-align:center}
.phone__frame{position:relative;border-radius:38px;padding:12px;background:linear-gradient(145deg,#2a3242,#0b0f17);box-shadow:0 50px 90px -30px rgba(0,0,0,.8),0 0 0 1px rgba(255,255,255,.08),0 0 80px -10px rgba(127,224,138,.18);transform:rotate(-2deg);transition:transform .5s}
.phone__frame:hover{transform:rotate(0) scale(1.02)}
.phone__frame img{border-radius:28px;width:100%}
.pin{position:absolute;right:-14px;width:30px;height:30px;border-radius:50%;background:#7fe08a;color:var(--ink);font:700 .85rem/30px var(--sans);box-shadow:0 0 0 4px rgba(127,224,138,.25);animation:pulse 2.4s infinite}
@keyframes pulse{50%{box-shadow:0 0 0 10px rgba(127,224,138,0)}}
.phone figcaption{font-size:.75rem;color:#7d899d;margin-top:.8rem}
.phone__nav{display:flex;align-items:center;justify-content:center;gap:.55rem;margin-top:1.1rem}
.phone__btn{width:34px;height:34px;border-radius:50%;border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.06);color:#fff;font-size:.95rem;cursor:pointer;display:grid;place-items:center;transition:background .15s,border-color .15s}
.phone__btn:hover{background:#7fe08a;color:var(--ink);border-color:#7fe08a}
.phone__dots{display:flex;gap:.35rem;align-items:center}
.phone__dot{width:8px;height:8px;border-radius:999px;border:0;padding:0;background:rgba(255,255,255,.25);cursor:pointer;transition:width .2s,background .2s}
.phone__dot.active{width:22px;background:#7fe08a}
.phone__count{font-size:.75rem;color:#9fabbf;font-variant-numeric:tabular-nums;min-width:2.6em}
.notes-wrap{display:flex;flex-direction:column;gap:1rem}
.notes-head{padding:.2rem 0 .4rem;border-bottom:1px solid rgba(255,255,255,.1)}
.notes-head__badge{display:inline-block;font-size:.72rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:#7fe08a;margin-bottom:.3rem}
.notes-head h4{color:#fff;font-size:1.15rem;margin:0}
.notes{list-style:none;display:flex;flex-direction:column;gap:1.1rem}
.notes li{display:grid;grid-template-columns:30px 1fr;gap:.9rem;align-items:start;padding:.85rem 1.05rem;border-radius:12px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.07)}
.notes li>b{width:30px;height:30px;border-radius:50%;background:#7fe08a;color:var(--ink);display:grid;place-items:center;font-size:.85rem}
.notes__zh{font-size:.82rem;color:#7fe08a;margin-bottom:.25rem;display:flex;flex-wrap:wrap;align-items:center;gap:.4rem}
.notes__tag{font-size:.66rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;padding:.15rem .45rem;border-radius:4px;background:rgba(127,224,138,.16);color:#7fe08a}
.notes li.note--parent{background:rgba(201,162,74,.1);border-color:rgba(201,162,74,.38)}
.notes li.note--parent>b,.pin--parent{background:var(--gold);color:var(--ink)}
.pin--parent{box-shadow:0 0 0 4px rgba(201,162,74,.28)}
.notes li.note--parent .notes__zh{color:#f3d27a}
.notes li.note--parent .notes__tag{background:rgba(201,162,74,.22);color:#f3d27a}
.notes li p{font-size:.93rem;color:#eef1f6;line-height:1.45}
.notes small{display:block;color:#8b97ab;font-size:.8rem;margin-top:.25rem}

/* ---------- Byline ---------- */
.byline{display:flex;flex-direction:column;gap:.35rem;margin:-0.2rem 0 1.6rem;padding:1rem 1.2rem;border-radius:12px;background:rgba(255,255,255,.05);border:1px solid rgba(201,162,74,.35)}
.byline__name{font-family:var(--serif);font-size:1.35rem;color:var(--gold);font-weight:600}
.byline__title{font-size:.86rem;color:#c9d1dd;line-height:1.5}

/* ---------- Scroll reveal ---------- */
.js-reveal .reveal{opacity:0;transform:translateY(28px);transition:opacity .8s cubic-bezier(.2,.7,.2,1),transform .8s cubic-bezier(.2,.7,.2,1)}
.js-reveal .reveal.in{opacity:1;transform:none}
.js-reveal .restraint__grid .reveal:nth-child(2){transition-delay:.12s}
.js-reveal .restraint__grid .reveal:nth-child(3){transition-delay:.24s}

/* ---------- Setup bar (?setup) ---------- */
.setup-bar{position:sticky;top:0;z-index:100;background:#fff8d6;color:#5a4a00;font-size:.82rem;padding:.55rem 4vw;display:flex;flex-wrap:wrap;gap:1rem;border-bottom:1px solid #eadb8c}
.setup-bar .todo{color:var(--red);font-weight:600}.setup-bar .ok{color:#1f7a4a}

/* ---------- Paper grain for warmth ---------- */
.section--paper,.hero{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence baseFrequency='.9' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 .4 0 0 0 0 .3 0 0 0 0 .2 0 0 0 .05 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}
.hero{background-color:var(--paper)}

@media (max-width:1100px){
  .restraint__grid{grid-template-columns:1fr 300px}
  .notes-wrap{grid-column:1/-1}
  .notes{display:grid;grid-template-columns:1fr 1fr}
}
@media (max-width:720px){
  .restraint__grid{grid-template-columns:1fr}
  .phone{max-width:300px;margin:0 auto}
  .notes{grid-template-columns:1fr}
  .pin{right:-8px}
}