:root{--ink:#15191c;--paper:#f3f1ea;--line:#d6d8d1;--soft:#6b746f;--night:#101b22;--night-2:#172630;--accent:#dfff65;--header:86px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"Helvetica Neue","PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}
button,input{font:inherit}
button{cursor:pointer}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
::selection{background:var(--accent);color:var(--night)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.reading-progress{position:fixed;z-index:30;top:0;left:0;width:0;height:3px;background:var(--accent);pointer-events:none}
.site-header{height:var(--header);padding:0 clamp(22px,4.8vw,76px);display:flex;align-items:center;justify-content:space-between;gap:24px;position:absolute;z-index:10;top:0;left:0;right:0;color:#f5f4ec;border-bottom:1px solid rgba(255,255,255,.15)}
.brand{display:inline-flex;align-items:center;gap:12px;line-height:1;font-size:21px;letter-spacing:.13em;font-weight:700;white-space:nowrap}
.brand small{display:block;font-size:9px;font-weight:500;letter-spacing:.2em;margin-top:6px;color:#adbbb7}
.brand-dot,.footer-brand span{color:var(--accent)}
.brand-mark{width:27px;height:27px;position:relative;display:block;border:1px solid var(--accent);transform:rotate(-12deg)}
.brand-mark i{position:absolute;display:block;width:4px;height:16px;top:5px;background:var(--accent);transform:skew(-18deg)}
.brand-mark i:nth-child(1){left:5px}.brand-mark i:nth-child(2){left:11px;height:12px;top:7px}.brand-mark i:nth-child(3){left:17px;height:8px;top:9px}
.site-nav{display:flex;align-items:center;gap:clamp(18px,3vw,44px);font-size:13px;letter-spacing:.025em}
.site-nav a{color:#c5d0cc;transition:color .2s ease}.site-nav a:hover,.site-nav a[aria-current=page]{color:var(--accent)}
.hero{background:var(--night);color:#f5f4eb;min-height:720px;height:100svh;max-height:1020px;overflow:hidden;position:relative}
.hero:before,.closing:before,.about-hero:before,.article-hero:before{content:"";position:absolute;inset:0;pointer-events:none;background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);background-size:8vw 8vw;opacity:.3}
.hero-inner{height:100%;position:relative;display:flex;align-items:center;padding:var(--header) clamp(22px,7vw,112px) 0}
.hero-copy{position:relative;z-index:2;width:min(58%,770px);padding-bottom:25px}
.eyebrow{font-size:11px;line-height:1.4;letter-spacing:.18em;font-weight:700;color:#506059;display:inline-flex;align-items:center;gap:13px;text-transform:uppercase}
.eyebrow.light{color:#b8c9c5}
.eyebrow-line{width:29px;height:1px;background:currentColor;display:inline-block}
.hero-brand{font-size:12px;letter-spacing:.25em;margin:38px 0 13px;font-weight:700;color:var(--accent)}
.hero-brand span{color:#97a8a4;margin-left:13px;font-size:10px;font-weight:500}
h1,h2,h3,p{margin-top:0}
.hero h1{font-size:clamp(48px,5.3vw,92px);line-height:1.18;letter-spacing:-.075em;font-weight:600;margin:0 0 26px;white-space:nowrap}
.hero h1 span,.about-hero h1 span{color:var(--accent)}
.hero-lead{font-size:clamp(15px,1.35vw,19px);line-height:1.8;color:#bac8c4;max-width:500px;margin:0}
.hero-actions{display:flex;align-items:center;gap:30px;margin-top:43px;flex-wrap:wrap}
.button-primary{background:var(--accent);color:var(--night);min-height:54px;padding:0 22px;display:inline-flex;align-items:center;justify-content:space-between;gap:42px;font-size:14px;font-weight:700;transition:background .2s,transform .2s}
.button-primary:hover{background:#edffaf;transform:translateY(-3px)}
.button-primary span{font-size:20px;font-weight:400}
.text-link{display:inline-flex;gap:15px;align-items:center;font-size:14px;border-bottom:1px solid;padding-bottom:8px;transition:gap .2s}
.text-link:hover{gap:23px}.light-link{color:#d7e1dc;border-color:#5b6c68}
.hero-visual{position:absolute;right:-9%;top:12%;width:min(52vw,730px);height:78%;display:flex;align-items:center;justify-content:center;z-index:1;opacity:.96;animation:floatin 1.2s both}
.hero-visual img{width:100%;max-height:100%;object-fit:contain;filter:drop-shadow(0 30px 45px rgba(0,0,0,.24))}
.hero-index{position:absolute;right:6%;bottom:44px;display:flex;gap:24px;color:#849a96;letter-spacing:.25em;font-size:10px}.hero-index span+span:before{content:"/";margin-right:24px;color:var(--accent)}
.intro-band{min-height:250px;padding:55px clamp(22px,7vw,112px);display:flex;justify-content:space-between;gap:40px;align-items:end;border-bottom:1px solid var(--line)}
.intro-band p{font-size:clamp(26px,3.2vw,48px);line-height:1.37;letter-spacing:-.045em;margin:0;font-weight:600}.intro-band em{font-style:normal;color:#7b8680}.intro-band>span{font-size:12px;color:var(--soft);padding-bottom:8px;white-space:nowrap}
.section{padding:130px clamp(22px,7vw,112px)}
.path-section{display:grid;grid-template-columns:37% 1fr;gap:8%;border-bottom:1px solid var(--line)}
.section-heading h2,.lessons-head h2{font-size:clamp(42px,4.3vw,69px);line-height:1.16;letter-spacing:-.065em;margin:24px 0 27px;font-weight:600}.section-heading p{max-width:340px;font-size:16px;line-height:1.85;color:var(--soft)}
.path-list{border-top:1px solid #9da7a0;margin-top:9px}
.path-step{border-bottom:1px solid #b9c0b8;display:grid;grid-template-columns:100px 1fr 50px;gap:18px;padding:32px 0;align-items:start}
.path-step>span:first-child{font-size:11px;letter-spacing:.1em;color:#596761;padding-top:7px}
.path-step h3{font-size:25px;letter-spacing:-.04em;margin:0 0 9px;font-weight:600}.path-step p{color:var(--soft);font-size:14px;line-height:1.75;margin:0;max-width:450px}.step-symbol{font-size:31px;font-weight:300;line-height:1;color:#8ba58b;text-align:right}
.lessons-section{padding-top:125px;padding-bottom:142px}
.lessons-head{display:flex;justify-content:space-between;align-items:end;gap:35px}.lessons-head h2{margin-bottom:0}.lessons-head p{color:var(--soft);font-size:14px;margin-bottom:9px}
.lesson-tools{display:flex;justify-content:space-between;gap:24px;align-items:center;padding:60px 0 25px;border-bottom:1px solid #9da7a0}
.filters{display:flex;gap:8px;flex-wrap:wrap}.filter{border:1px solid #bbc4ba;background:transparent;color:#52615a;padding:9px 15px;font-size:12px;transition:background .2s,color .2s,border .2s}.filter:hover,.filter.active{background:var(--night);border-color:var(--night);color:#fff}
.search-wrap{width:240px;position:relative}.search-wrap input{background:transparent;border:0;border-bottom:1px solid #a7b2a6;width:100%;padding:9px 30px 9px 0;border-radius:0;outline:0;color:var(--ink);font-size:13px}.search-wrap input:focus{border-color:var(--night)}.search-wrap>span:last-child{position:absolute;right:3px;top:2px;font-size:25px;color:#65736a}
.lesson-row{display:grid;grid-template-columns:95px 1fr 55px;align-items:center;gap:20px;padding:29px 0;border-bottom:1px solid #c7cec4;transition:padding .25s,background .25s}.lesson-row:hover{padding-left:14px;background:#e9ede3}.lesson-row[hidden]{display:none}.lesson-number{font-size:22px;font-weight:500;color:#91a198;letter-spacing:-.06em}.lesson-info{display:flex;flex-direction:column;gap:6px}.lesson-category{font-size:10px;color:#75837a;letter-spacing:.08em}.lesson-category b{font-weight:400;padding:0 6px}.lesson-info strong{font-size:clamp(21px,2vw,31px);font-weight:600;letter-spacing:-.045em}.lesson-summary{font-size:13px;color:var(--soft)}.row-arrow{text-align:right;font-size:27px;color:#52665a;transition:transform .2s}.lesson-row:hover .row-arrow{transform:translate(3px,-3px)}.no-results{color:var(--soft);padding:35px 0}
.skill-teaser{background:#dfe7d5;display:grid;grid-template-columns:36% 1fr;gap:8%;padding:110px clamp(22px,7vw,112px);align-items:start}.skill-teaser>.eyebrow{margin-top:12px}.skill-teaser h2{font-size:clamp(36px,4vw,62px);line-height:1.2;letter-spacing:-.055em;font-weight:600;margin:0 0 20px}.skill-teaser p{color:#536357;font-size:16px;line-height:1.8;max-width:480px;margin-bottom:30px}.skill-teaser .text-link{border-color:#7c967c}
.closing{background:#16242c;color:#f0f3e8;position:relative;overflow:hidden}.closing-inner{padding:130px clamp(22px,7vw,112px);position:relative}.closing h2{font-size:clamp(43px,5.3vw,79px);line-height:1.18;letter-spacing:-.065em;font-weight:600;margin:22px 0 39px}.closing .button-primary{min-width:190px}
.site-footer{background:#101b22;color:#d8e2dd;padding:76px clamp(22px,7vw,112px) 34px}.footer-top{display:flex;align-items:end;justify-content:space-between;gap:30px;padding-bottom:74px;border-bottom:1px solid #3b4b50}.footer-brand{font-size:43px;font-weight:700;letter-spacing:-.06em}.footer-top p{font-size:13px;line-height:1.7;color:#9caeaa;max-width:300px;margin:0}.footer-bottom{display:flex;gap:20px;flex-wrap:wrap;justify-content:space-between;padding-top:24px;color:#8ba09c;font-size:11px}.filings{text-align:center;padding-top:20px;color:#a8b8b2;font-size:12px;line-height:1.8}.filings a{text-decoration:underline;text-underline-offset:3px}.filings a:hover{color:var(--accent)}
.article-hero{background:var(--night);color:#f2f4eb;position:relative;overflow:hidden;padding:calc(var(--header) + 72px) clamp(22px,7vw,112px) 90px;min-height:540px}.article-hero-inner{position:relative;z-index:1;max-width:820px}.back-link{font-size:12px;color:#a8b9b1;display:inline-block;margin-bottom:56px;border-bottom:1px solid #53645c;padding-bottom:7px}.back-link:hover{color:var(--accent)}.article-kicker{display:flex;gap:25px;font-size:11px;color:var(--accent);letter-spacing:.11em;margin-bottom:20px}.article-kicker span+span{color:#94aaa2}.article-hero h1{font-size:clamp(43px,5.3vw,78px);line-height:1.17;letter-spacing:-.065em;font-weight:600;margin:0 0 23px}.article-hero p{font-size:18px;line-height:1.75;color:#bbc9c3;max-width:640px}.article-hero-number{position:absolute;right:7vw;bottom:-.23em;font-size:clamp(240px,27vw,450px);line-height:1;font-weight:700;letter-spacing:-.1em;color:rgba(223,255,101,.05);user-select:none}
.article-layout{display:grid;grid-template-columns:minmax(0,740px) 230px;justify-content:space-between;gap:10%;padding:87px clamp(22px,7vw,112px) 110px}.article-body{min-width:0}.article-intro{font-size:clamp(20px,2vw,26px);line-height:1.7;letter-spacing:-.02em;margin:0 0 72px;font-weight:500}.article-section{border-top:1px solid #b6c2b5;padding:34px 0 54px;scroll-margin-top:30px}.article-section-num{font-size:11px;color:#7a8c80;letter-spacing:.14em}.article-section h2{font-size:clamp(28px,3vw,39px);line-height:1.28;letter-spacing:-.055em;font-weight:600;margin:21px 0 20px}.article-section p{font-size:16px;line-height:1.95;color:#46524b;max-width:680px;margin:0}.article-sidebar{position:relative}.article-sidebar>div{position:sticky;top:40px;border-top:1px solid #9eafa2;padding-top:21px;display:flex;flex-direction:column;gap:18px}.article-sidebar>div>span{font-size:11px;letter-spacing:.14em;color:#78887c;margin-bottom:12px}.article-sidebar a{font-size:13px;line-height:1.5;color:#45584a;transition:color .2s}.article-sidebar a:hover{color:#0a1210}.article-sidebar a span{color:#96a79a;margin-right:13px}.article-sidebar .sidebar-all{border-top:1px solid #bdc8bd;padding-top:20px;margin-top:14px;font-weight:600}
.example{background:#dfe7d5;padding:33px 38px 37px;margin:5px 0 80px;border-left:3px solid #8caa72}.example span{font-size:11px;color:#567055;letter-spacing:.13em;font-weight:700}.example p{font-size:18px;line-height:1.75;margin:16px 0 0}.takeaways{border-top:1px solid #aab9aa;padding-top:28px}.takeaways h2{font-size:36px;letter-spacing:-.05em;margin:20px 0 23px}.takeaways ul{list-style:none;padding:0;margin:0}.takeaways li{padding:15px 0 15px 29px;border-top:1px solid #cbd3c9;font-size:15px;line-height:1.5;position:relative}.takeaways li:before{content:"↗";position:absolute;left:0;color:#6c906b}
.lesson-pagination{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid #b8c4b8}.lesson-pagination a,.lesson-pagination .nav-spacer{padding:37px clamp(22px,7vw,112px);min-height:135px;display:flex;flex-direction:column;gap:11px}.lesson-pagination a+ a,.lesson-pagination .nav-spacer+a{border-left:1px solid #b8c4b8}.lesson-pagination a:last-child{text-align:right}.lesson-pagination a:hover{background:#e9ede3}.lesson-pagination span{font-size:11px;color:#7d8d80}.lesson-pagination strong{font-size:17px;font-weight:600;letter-spacing:-.03em}
.about-hero{background:var(--night);color:#f3f4eb;position:relative;min-height:680px;display:flex;align-items:center;padding:var(--header) clamp(22px,7vw,112px) 0}.about-hero-inner{position:relative;z-index:1;max-width:850px}.about-hero h1{font-size:clamp(49px,6vw,91px);line-height:1.19;letter-spacing:-.07em;font-weight:600;margin:31px 0}.about-hero p{font-size:17px;line-height:1.9;color:#bac8c4;max-width:620px}.about-content{display:grid;grid-template-columns:30% 1fr;column-gap:8%;row-gap:0;padding:90px clamp(22px,7vw,112px) 120px}.about-label,.about-content>div:nth-child(even){padding:40px 0;border-top:1px solid #b5c2b7}.about-label{font-size:11px;letter-spacing:.15em;color:#7d8e81}.about-content h2{font-size:clamp(29px,3vw,42px);letter-spacing:-.05em;font-weight:600}.about-content p{font-size:16px;line-height:1.9;color:#546058;max-width:650px}.about-end{background:#dfe7d5;padding:74px clamp(22px,7vw,112px);display:flex;align-items:center;justify-content:space-between;gap:20px}.about-end p{font-size:clamp(26px,3vw,42px);letter-spacing:-.05em;margin:0}.about-end .button-primary{background:var(--night);color:#fff}.about-end .button-primary:hover{background:#344d43}
.skill-hero{background:var(--night);color:#f3f4eb;min-height:620px;padding:calc(var(--header) + 105px) clamp(22px,7vw,112px) 100px;position:relative;overflow:hidden}.skill-hero:after{content:"07";position:absolute;right:2%;bottom:-.26em;font-size:clamp(280px,33vw,520px);font-weight:700;letter-spacing:-.12em;color:rgba(223,255,101,.05);line-height:1;pointer-events:none}.skill-hero>div{position:relative;z-index:1}.skill-hero h1{font-size:clamp(50px,6vw,90px);line-height:1.18;letter-spacing:-.07em;font-weight:600;margin:30px 0}.skill-hero h1 span{color:var(--accent)}.skill-hero p{max-width:590px;font-size:17px;line-height:1.8;color:#b8c8c0}.skill-index{padding:70px clamp(22px,7vw,112px) 135px}.skill-index-head{display:flex;align-items:end;justify-content:space-between;gap:20px;border-bottom:1px solid #94a496;padding-bottom:24px}.skill-index-head span{font-size:11px;letter-spacing:.16em;color:#667a6b}.skill-index-head p{max-width:460px;color:#68796b;font-size:13px;line-height:1.6;margin:0}.skill-row{display:grid;grid-template-columns:24% 1fr 210px;gap:30px;align-items:start;padding:42px 0;border-bottom:1px solid #c1ccc1}.skill-row-type{font-size:11px;letter-spacing:.08em;color:#77907a;padding-top:6px}.skill-code{font-size:11px;color:#819783;letter-spacing:.08em}.skill-row h2{font-size:clamp(23px,2.6vw,36px);font-weight:600;letter-spacing:-.05em;margin:10px 0 14px}.skill-row p{font-size:14px;line-height:1.8;color:#4f5c51;margin:0;max-width:600px}.skill-row .skill-start{color:#7b8d7d;margin-top:11px}.skill-row>a{font-size:13px;font-weight:600;display:flex;justify-content:space-between;gap:15px;border-bottom:1px solid #9eae9f;padding:5px 0 10px;margin-top:4px}.skill-row>a:hover{color:#4c7b51}
@keyframes floatin{from{opacity:0;transform:translate(45px,25px)}to{opacity:.96;transform:translate(0,0)}}
@media(max-width:900px){.hero-copy{width:65%}.hero-visual{width:60vw;right:-12%;opacity:.58}.path-section{grid-template-columns:1fr;gap:50px}.section-heading p{max-width:520px}.article-layout{grid-template-columns:minmax(0,1fr) 180px;gap:5%}}
@media(max-width:640px){:root{--header:72px}.site-header{padding:0 22px;align-items:center}.brand{font-size:17px}.brand small{font-size:8px}.brand-mark{width:23px;height:23px}.brand-mark i{top:3px}.site-nav{gap:12px;font-size:10px}.site-nav a:first-child{display:none}.hero{height:auto;min-height:760px;max-height:none}.hero-inner{display:block;padding:calc(var(--header) + 65px) 22px 230px}.hero-copy{width:100%;padding:0}.hero-brand{margin-top:28px}.hero h1{font-size:clamp(41px,9.4vw,58px);white-space:normal;letter-spacing:-.07em}.hero-lead{max-width:360px}.hero-actions{margin-top:30px;gap:21px}.hero-visual{width:420px;height:400px;top:auto;bottom:-85px;right:-90px;opacity:.64}.hero-index{display:none}.intro-band{min-height:0;padding:55px 22px;display:block}.intro-band>span{display:block;margin-top:24px}.section{padding:83px 22px}.section-heading h2,.lessons-head h2{font-size:43px}.path-step{grid-template-columns:70px 1fr 27px;gap:11px;padding:24px 0}.path-step h3{font-size:22px}.path-step p{font-size:13px}.step-symbol{font-size:24px}.lessons-head{display:block}.lessons-head p{margin-top:14px}.lesson-tools{display:block;padding-top:35px}.filters{gap:6px}.filter{padding:8px 10px;font-size:11px}.search-wrap{margin-top:21px;width:100%}.lesson-row{grid-template-columns:44px 1fr 25px;gap:8px;padding:23px 0}.lesson-number{font-size:16px}.lesson-info strong{font-size:21px}.lesson-summary{font-size:12px}.row-arrow{font-size:20px}.skill-teaser{grid-template-columns:1fr;gap:30px;padding:75px 22px}.skill-teaser h2{font-size:41px}.closing-inner{padding:91px 22px}.site-footer{padding:65px 22px 30px}.footer-top{display:block;padding-bottom:50px}.footer-top p{margin-top:22px}.footer-bottom{display:block;line-height:2}.footer-bottom>*{display:block}.article-hero{min-height:500px;padding:calc(var(--header) + 54px) 22px 57px}.back-link{margin-bottom:58px}.article-hero h1{font-size:45px}.article-hero p{font-size:16px}.article-hero-number{font-size:250px;right:10px}.article-layout{display:block;padding:64px 22px 85px}.article-intro{margin-bottom:55px}.article-section{padding-bottom:43px}.article-section p{font-size:15px}.article-sidebar{display:none}.example{padding:26px 24px;margin-bottom:70px}.example p{font-size:16px}.takeaways h2{font-size:31px}.lesson-pagination a,.lesson-pagination .nav-spacer{min-height:125px;padding:25px 22px}.lesson-pagination strong{font-size:14px}.about-hero{min-height:620px;padding:var(--header) 22px 0}.about-hero h1{font-size:50px}.about-hero p{font-size:15px}.about-content{grid-template-columns:1fr;padding:65px 22px 85px}.about-label{padding:25px 0 0}.about-content>div:nth-child(even){border:0;padding:20px 0 42px}.about-content h2{font-size:30px}.about-content p{font-size:15px}.about-end{padding:60px 22px;display:block}.about-end .button-primary{margin-top:25px}.skill-hero{min-height:600px;padding:calc(var(--header) + 95px) 22px 80px}.skill-hero h1{font-size:48px}.skill-hero p{font-size:15px}.skill-index{padding:50px 22px 80px}.skill-index-head{display:block}.skill-index-head p{margin-top:13px}.skill-row{grid-template-columns:1fr;gap:14px;padding:32px 0}.skill-row h2{font-size:27px;margin:8px 0}.skill-row>a{margin-top:7px;width:max-content;max-width:100%;min-width:180px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}