:root{--navy:#0B1F3A;--blue:#155EEF;--cyan:#16DCE5;--off:#F7F9FC;--soft:#E9F0F7;--text:#172033;--muted:#4A5A72;--line:#D6E2EF}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Prompt',sans-serif;color:var(--text);background:#fff;font-size:20px;line-height:1.7;overflow-x:hidden}
img{max-width:100%;display:block}
.wrap{max-width:1160px;margin:0 auto;padding:0 28px}
h1,h2,h3{color:var(--navy);line-height:1.38;font-weight:700}
h1{font-size:44px}h2{font-size:38px}h3{font-size:21px;font-weight:600;line-height:1.45}
.hl{color:var(--blue)}
.eyebrow{display:inline-block;font-size:20px;font-weight:600;letter-spacing:.08em;color:var(--blue);background:var(--soft);padding:8px 22px;border-radius:99px;margin-bottom:18px}
section{padding:88px 0}
.center{text-align:center}.center p.lead{margin-left:auto;margin-right:auto}
.lead{font-size:20px;color:var(--muted);max-width:680px;margin-top:14px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:54px;padding:12px 30px;border-radius:12px;background:var(--navy);color:#fff;font-size:18px;font-weight:600;text-decoration:none;border:2px solid var(--navy);transition:.2s}
.btn:hover{background:var(--blue);border-color:var(--blue)}
.btn-ghost{background:#fff;color:var(--navy)}
.btn-ghost:hover{color:#fff}
.btn-cyan{background:var(--cyan);border-color:var(--cyan);color:var(--navy)}
.btns{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.center .btns{justify-content:center}
.note{font-size:18px;color:var(--muted);margin-top:12px;display:flex;align-items:center;gap:6px}
.center .note{justify-content:center}
.ic{width:20px;height:20px;flex:none;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);border-bottom:1px solid var(--soft)}
.hd{display:flex;justify-content:space-between;align-items:center;height:68px}
.hd img{height:42px;width:auto}
.hd .btn{min-height:44px;padding:6px 20px;font-size:17px}
/* hero */
#hero{padding:64px 0 72px;background:linear-gradient(180deg,#fff,var(--off))}
.hero{display:grid;grid-template-columns:1.15fr 1fr;gap:56px;align-items:center}
.hero .sub{font-size:20px;margin-top:18px;color:var(--muted)}
.video{position:relative;aspect-ratio:16/9;border-radius:18px;overflow:hidden;box-shadow:0 20px 50px rgba(11,31,58,.18);background:var(--navy);display:block}
.video img{width:100%;height:100%;object-fit:cover}
.video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.play{position:absolute;inset:0;width:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;background:linear-gradient(rgba(11,31,58,.45),rgba(11,31,58,.6));border:0;cursor:pointer;font-family:inherit;transition:background .2s}
.play:hover{background:rgba(11,31,58,.35)}
.play .pc{width:104px;height:104px;border-radius:50%;background:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 0 0 12px rgba(255,255,255,.25),0 12px 30px rgba(0,0,0,.35);transition:transform .2s}
.play:hover .pc{transform:scale(1.07)}
.play svg{width:42px;height:42px;fill:var(--navy);margin-left:6px}
.play em{font-style:normal;color:#fff;font-weight:600;font-size:19px;background:rgba(11,31,58,.7);padding:6px 16px;border-radius:99px}
/* numbers */
#numbers{padding:0;margin-top:-1px;background:var(--off)}
.nums{display:grid;grid-template-columns:repeat(4,1fr);background:var(--navy);border-radius:18px;color:#fff;transform:translateY(0)}
.nums div{padding:28px 16px;text-align:center;border-right:1px solid rgba(255,255,255,.12)}
.nums div:last-child{border:0}
.nums b{display:block;font-size:44px;line-height:1.2;color:var(--cyan)}
.nums span{font-size:18px;opacity:.9}
/* cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:40px}
.card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px}
.card .ic{width:24px;height:24px;color:var(--blue);margin-bottom:12px}
.card p{font-size:19px;line-height:1.6}
.scene{max-width:720px;margin:18px auto 0;font-size:20px;color:var(--muted)}
/* steps */
#method{background:var(--off)}
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;margin-top:44px;counter-reset:s}
.step{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px 20px;text-align:left}
.step i{display:flex;width:44px;height:44px;border-radius:50%;background:var(--navy);color:#fff;font-style:normal;font-weight:700;font-size:20px;align-items:center;justify-content:center;margin-bottom:14px}
.step p{font-size:19px;line-height:1.6;color:var(--muted);margin-top:4px}
/* curriculum */
.mods{max-width:820px;margin:40px auto 0;border:1px solid var(--line);border-radius:16px;overflow:hidden;text-align:left}
.mod{display:grid;grid-template-columns:56px 1fr auto;gap:16px;align-items:center;padding:18px 22px;border-bottom:1px solid var(--line)}
.mod:last-child{border:0}
.mod i{font-style:normal;font-weight:700;color:var(--blue);font-size:17px}
.mod b{font-weight:600;color:var(--navy);line-height:1.5}
.mod span{font-size:18px;background:var(--soft);padding:3px 12px;border-radius:99px;white-space:nowrap}
details{max-width:820px;margin:16px auto 0;border:1px solid var(--line);border-radius:14px;background:#fff;text-align:left}
summary{cursor:pointer;padding:16px 22px;font-weight:600;color:var(--navy);list-style:none;display:flex;justify-content:space-between;align-items:center}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-size:24px;line-height:1;color:var(--blue)}
details[open] summary::after{content:"–"}
details ol{list-style:none;padding:0 22px 18px;font-size:19px}
details li{padding:7px 0;border-top:1px dashed var(--line)}
/* bonus */
#bonus{background:var(--navy);color:#fff}
#bonus h2{color:#fff}#bonus .lead{color:#C9D6E8}
.two{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.two img{border-radius:16px}
/* for who */
.list{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:14px 28px;max-width:860px;margin:36px auto 0;text-align:left}
.list li,.check li{display:flex;gap:10px;align-items:flex-start;line-height:1.55}
.list .ic,.check .ic{color:var(--blue);margin-top:4px}
/* instructor */
#instructor{background:var(--off)}
.inst{display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:center}
.inst img{border-radius:18px;aspect-ratio:1/1;object-fit:cover;width:100%}
.inst .role{color:var(--muted);margin-top:6px}
.check{list-style:none;margin-top:20px;display:grid;gap:12px;font-size:20px}
.quote{margin-top:22px;padding:16px 20px;border-left:4px solid var(--cyan);background:#fff;border-radius:0 12px 12px 0;font-style:italic;color:var(--navy)}
/* pricing */
.price{max-width:560px;margin:40px auto 0;background:#fff;border:2px solid var(--navy);border-radius:20px;padding:36px;text-align:left;box-shadow:0 20px 50px rgba(11,31,58,.1)}
.price .old{color:var(--muted);text-decoration:line-through}
.price .now{font-size:54px;font-weight:700;color:var(--navy);line-height:1.25}
.price .now small{font-size:22px}
.tag{display:inline-block;background:#FFF1D6;color:#8A5300;font-size:18px;font-weight:600;padding:5px 14px;border-radius:8px;margin-top:6px}
.price hr{border:0;border-top:1px solid var(--line);margin:22px 0}
.price .btn{width:100%;margin-top:24px}
/* faq */
#faq{background:var(--off)}
.faq{max-width:820px;margin:36px auto 0}
.faq details{margin-top:12px}
.faq p{padding:0 22px 18px;color:var(--muted);font-size:20px}
#final-cta{background:var(--navy);color:#fff}
#final-cta h2{color:#fff;max-width:820px;margin:0 auto}
#final-cta .lead{color:#C9D6E8}
#final-cta .note{color:#C9D6E8}
#final-cta .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
footer{background:#071629;color:#9FB0C8;text-align:center;padding:24px;font-size:18px}
@media(max-width:960px){
 .hero,.two,.inst{grid-template-columns:1fr;gap:36px}
 .steps{grid-template-columns:1fr 1fr}
 .cards{grid-template-columns:1fr}
}
@media(max-width:640px){
 body{font-size:18px}
 .wrap{padding:0 20px}
 section{padding:60px 0}
 h1{font-size:34px}h2{font-size:28px}
 #hero{padding:36px 0 48px}
 .hero .sub{font-size:18px}
 .nums{grid-template-columns:1fr 1fr}
 .nums div:nth-child(2){border-right:0}
 .nums div:nth-child(-n+2){border-bottom:1px solid rgba(255,255,255,.12)}
 .nums b{font-size:36px}
 .steps,.list{grid-template-columns:1fr}
 .mod{grid-template-columns:40px 1fr;padding:16px}
 .mod span{grid-column:2;justify-self:start}
 .btns .btn{width:100%}
 .price{padding:26px 22px}.price .now{font-size:44px}
 .hd .btn{padding:6px 14px;font-size:16px}
 .eyebrow{font-size:18px;padding:7px 18px}
 .lead,.check,.faq p,.card p,.scene{font-size:18px}
 .step p,details ol{font-size:17px}
 .mod span,.nums span,footer{font-size:16px}
 .note,.tag{font-size:17px}
 .books figcaption{font-size:16px}
}
.check li.books{display:grid;grid-template-columns:repeat(2,minmax(0,170px));gap:20px;margin:4px 0 4px 30px}
.books figure{margin:0}
.books img{width:100%;aspect-ratio:2/3;object-fit:cover;border-radius:8px;box-shadow:0 10px 24px rgba(11,31,58,.18)}
.books figcaption{font-size:18px;line-height:1.45;margin-top:8px;color:var(--muted)}
@media(max-width:640px){.check li.books{margin-left:0;grid-template-columns:1fr 1fr;gap:14px}.play .pc{width:80px;height:80px}.play svg{width:32px;height:32px}.play em{font-size:17px}}

.role{font-size:20px}
@media(max-width:640px){.role{font-size:18px}}
@media(max-width:640px){.books figcaption{font-size:16px}}
/* claude-cowork additions */
.what{max-width:820px;margin:28px auto 0;font-size:21px;color:var(--text)}
.uses{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:40px;text-align:left}
.uses .card h3{color:var(--blue);margin-bottom:8px}
.mod em{display:block;font-style:normal;font-weight:400;font-size:18px;color:var(--muted);margin-top:4px;line-height:1.55}
.mod b{display:block}
#bonus .two img{max-width:420px;margin:0 auto;width:100%;box-shadow:0 20px 50px rgba(0,0,0,.35)}
.cond{display:inline-block;margin-top:16px;background:rgba(22,220,229,.15);color:var(--cyan);font-weight:600;padding:8px 16px;border-radius:10px;font-size:19px}
#testimonials{background:#fff}
.tst{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:40px;text-align:left}
.tst blockquote{background:var(--off);border:1px solid var(--line);border-radius:16px;padding:26px;font-size:19px;line-height:1.65;display:flex;flex-direction:column;gap:16px}
.tst blockquote p::before{content:"“";color:var(--cyan);font-size:44px;line-height:0;vertical-align:-16px;margin-right:4px;font-weight:700}
.tst cite{font-style:normal;margin-top:auto;border-top:1px solid var(--line);padding-top:12px}
.tst cite b{display:block;color:var(--navy)}.tst cite span{font-size:17px;color:var(--muted)}
@media(max-width:960px){.uses{grid-template-columns:1fr 1fr}.tst{grid-template-columns:1fr}}
@media(max-width:640px){
 body{font-size:19px}h1{font-size:36px}h2{font-size:30px}h3{font-size:21px}
 .uses{grid-template-columns:1fr}
 .what,.lead,.check,.faq p,.card p,.scene,.tst blockquote,.hero .sub{font-size:19px}
 .step p,details ol,.mod em{font-size:18px}
 .btn{font-size:19px;min-height:58px}
 .hd .btn{font-size:16px;min-height:44px}
 .cond{font-size:18px}
}
.notp{max-width:820px;margin:32px auto 0;background:#fff;border:1px solid var(--line);border-left:5px solid var(--cyan);border-radius:16px;padding:24px 28px;text-align:left}
.notp h3{font-size:24px;margin-bottom:6px}.notp p{font-size:20px;color:var(--muted)}.notp b{color:var(--navy)}
.nums b.dur{white-space:nowrap}
@media(max-width:640px){.nums b.dur{font-size:27px}.notp{padding:20px}.notp h3{font-size:22px}.notp p{font-size:19px}}
/* v3: bigger icons, bigger module numbers, bonus true ratio */
.card .ic{width:80px;height:80px;padding:14px;box-sizing:border-box;border-radius:50%;background:#E8F0FE;color:var(--blue);margin-bottom:18px;display:block;stroke-width:1.8}
.center .card .ic{margin-left:auto;margin-right:auto}
.mod{grid-template-columns:84px 1fr auto}
.mod i{font-size:46px;font-weight:800;line-height:1;letter-spacing:-1px}
#bonus .two img{width:100%;max-width:400px;height:auto!important;aspect-ratio:auto;object-fit:contain;align-self:center;justify-self:center;max-height:none}
@media(max-width:900px){.mod{grid-template-columns:64px 1fr}.mod i{font-size:36px}#bonus .two img{max-width:300px}}
/* v4: crisp icons no bg, testimonial avatars */
.card .ic{width:56px;height:56px;padding:0;background:none;border-radius:0;stroke-width:2;fill:none;stroke:currentColor;stroke-linecap:round;stroke-linejoin:round;filter:none;transform:none;shape-rendering:geometricPrecision;margin-bottom:16px}
.tst cite{display:flex;align-items:center;gap:14px}
.tst cite .av{width:64px;height:64px;border-radius:50%;object-fit:cover;flex:none;border:2px solid #fff;box-shadow:0 2px 8px rgba(0,0,0,.12)}
.tst cite .who{display:block}.tst cite .who span{display:block}