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30px;margin:auto}.article-shell h1{font-size:clamp(35px,5vw,57px);line-height:1.22;letter-spacing:-.05em}.article-lead{font-size:17px;color:#637769;line-height:2;margin:30px 0 50px}.article-panel{background:#fff;padding:35px;margin:20px 0;border:1px solid #e3ebe2;border-radius:14px}.article-panel h2{font-size:22px;letter-spacing:-.03em;margin:10px 0 20px}.article-panel p{color:#667969;line-height:2;font-size:14px}.article-checks{padding-left:22px}.article-checks li{padding:13px 0;line-height:1.85;border-bottom:1px solid #edf2ec;color:#405b48}.article-checks li:last-child{border:0}.article-checks label{cursor:pointer}.article-checks input{margin-right:10px}.hint{font-size:11px!important;color:#96a397!important}.article-foot{font-size:12px;color:#829387;text-align:center;margin:65px 0}.back{font-size:12px;color:#476c53}@media(max-width:950px){.hero{grid-template-columns:1fr}.hero-visual{max-width:560px;margin:auto;width:100%}.guide-grid{grid-template-columns:repeat(2,1fr)}.site-header nav{gap:12px}.score-layout{grid-template-columns:1fr}.score-result{min-height:300px}.section{padding:82px 28px}.cta{margin:28px}.hero{padding:20px 28px}.trust-strip{gap:20px}}@media(max-width:650px){.site-header{padding:15px 20px}.site-header nav a:not(.nav-github){display:none}.brand-extra{display:none}.page-top{font-size:9px}.hero{padding:25px 20px 40px;margin:10px auto 30px;gap:20px}.hero h1{font-size:43px}.hero-sub{font-size:13px}.hero-facts{gap:20px;margin-top:30px}.video-preview{height:255px}.video-big{font-size:42px}.window-dots span{font-size:7px}.trust-strip{font-size:9px;gap:8px;padding:16px 8px}.section{padding:68px 20px}.section h2{font-size:32px}.principle-grid,.guide-grid,.cases-grid,.daily-plan{grid-template-columns:1fr}.principle-grid{gap:9px}.principle-grid article{min-height:auto}.section-titleline,.split-head{align-items:flex-start;flex-direction:column;gap:12px}.guide-toolbar{flex-wrap:wrap}.searchbox{max-width:100%;width:100%;flex-basis:100%}.progress-small{min-width:110px}.plan-tabs{max-width:100%;overflow:auto}.side-note{text-align:left}.score-form,.score-result{padding:23px}.score-number{font-size:82px}.plan-summary{gap:35px}.guide-card{min-height:245px}.idea-row{grid-template-columns:30px 1fr;gap:8px}.idea-tag{display:none}.cta{border-radius:0;margin:0;padding:65px 25px}.cta:before{opacity:.4}.footer-links{margin-left:0}.article-shell{padding:40px 20px}.article-panel{padding:22px}.article-shell h1{font-size:38px}}

/* V2 execution clinic and unit-economics tool. */
.toolkit-section{padding-top:85px;padding-bottom:85px}.toolkit-grid{display:grid;grid-template-columns:1.13fr 1fr;gap:20px;margin-top:25px}.tool-card{margin:0;border:1px solid var(--line);background:#fff;border-radius:15px;padding:30px;box-shadow:0 10px 35px rgba(20,61,49,.025)}.tool-card h3{font-size:21px;letter-spacing:-.02em}.form-columns{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-bottom:26px}.form-columns label{display:flex;flex-direction:column;gap:8px;font-size:12px;color:#4f7058;font-weight:650}.tool-result{background:#143d31;color:#e8f5e7;display:flex;flex-direction:column;justify-content:center}.tool-result h3{font-size:25px;color:#fff}.tool-result .eyebrow{color:#bde69d}.tool-result #clinicFeedback,.tool-result #econEquation{font-size:14px;color:#e5efdf;line-height:2}.tool-result .quiet{font-size:11px;color:#adc8b1;margin-top:20px}.diagnosis-list{padding-left:21px;margin:0}.diagnosis-list li{margin-bottom:12px}.equation strong{font-size:25px;color:#d5f7ad}.economy-section{padding-top:40px}.source-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:35px}.source-list a{padding:20px 24px;border:1px solid #dae5d9;background:#fff;border-radius:9px;font-size:13px;color:#315f45;font-weight:700}.source-list a:hover{border-color:#86af85;background:#f2f8f0}
@media(max-width:760px){.toolkit-grid,.form-columns,.source-list{grid-template-columns:1fr}.tool-card{padding:22px}.toolkit-section{padding-top:60px;padding-bottom:60px}}

/* Public author contact — visible on mobile and in guide reading flow. */
.site-header nav .nav-contact{display:inline-flex;align-items:center;padding:9px 15px;border-radius:999px;background:#e9f2e4;color:#20513a;font-weight:750}
.hero-contact{display:flex;align-items:center;flex-wrap:wrap;gap:8px 16px;margin-top:18px;font-size:12px;color:#55735e}
.hero-contact span{font-size:11px;color:#8a9a8d}
.hero-contact a,.hero-contact button{background:transparent;color:#275f40;font-weight:750;border:0;padding:4px 0}
.hero-contact a:hover,.hero-contact button:hover{text-decoration:underline}
.contact-section{padding-top:90px;padding-bottom:75px}
.contact-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.contact-card{display:block;background:#fff;border:1px solid #dce6da;border-radius:17px;padding:34px;box-shadow:var(--shadow);min-width:0}
.contact-card:hover{border-color:#88a88b}
.contact-label{font-size:10px;letter-spacing:.14em;font-weight:850;color:#6b9272}
.contact-card h3{font-size:clamp(26px,3vw,39px);letter-spacing:-.05em;color:#173c2c;margin:18px 0 9px;overflow-wrap:anywhere}
.contact-card h3 span{font-size:22px}
.contact-card p{font-size:13px;color:#6a7f70;line-height:1.95;margin:0 0 22px}
.contact-bottom{font-size:13px;font-weight:750;color:#2e6546}
.contact-wechat{background:#edf5e8}
.contact-copy{display:inline-flex;align-items:center;justify-content:space-between;gap:18px;background:#174431;border:1px solid #174431;color:white;padding:13px 19px;font-weight:700;font-size:13px;border-radius:9px}
.contact-copy:hover{background:#265b40}
.copy-status{font-size:12px!important;min-height:20px;margin:14px 0 0!important;color:#376848!important}
.cta-actions button.button-border-light{background:transparent;cursor:pointer}
.article-contact{border-color:#bed2bf;background:#f1f7ee}
.article-contact p strong{color:#24583c}
.article-contact a{color:#236b42;font-weight:700;text-decoration:underline;text-underline-offset:3px}
@media(max-width:950px){.site-header nav .nav-contact{white-space:nowrap}}
@media(max-width:650px){.site-header nav .nav-contact{display:inline-flex!important;padding:8px 11px;font-size:11px}.site-header nav .nav-github{display:none}.contact-grid{grid-template-columns:1fr}.contact-card{padding:25px}.contact-section{padding-top:60px;padding-bottom:65px}.hero-contact{gap:6px 13px}.cta-actions button.button-border-light{width:100%}}