:root{--bg:#f7f7f4;--panel:#fff;--ink:#17202a;--muted:#5b6470;--line:#d8dcd6;--accent:#234b3f;--accent-2:#e7efe9;--danger:#9c2d2d;--success:#22603f;--warning:#8a6500}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Arial,Helvetica,sans-serif}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}.container{max-width:1120px;margin:0 auto;padding:32px 20px}.nav{border-bottom:1px solid var(--line);background:hsla(0,0%,100%,.9);position:-webkit-sticky;position:sticky;top:0;z-index:20;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.nav-inner{max-width:1120px;margin:0 auto;padding:14px 20px;display:flex;align-items:center;justify-content:space-between;gap:16px}.brand{font-weight:800;letter-spacing:-.03em;color:var(--accent)}.nav-links{display:flex;gap:14px;align-items:center;flex-wrap:wrap;font-size:14px;color:var(--muted)}.nav-links a:hover{color:var(--ink)}.hero{padding:64px 20px 40px}.hero-grid{max-width:1120px;margin:0 auto;display:grid;grid-template-columns:1.1fr .9fr;grid-gap:32px;gap:32px;align-items:center}.eyebrow{color:var(--accent);font-weight:700;text-transform:uppercase;font-size:12px;letter-spacing:.12em}h1{font-size:clamp(36px,5vw,64px);line-height:1.02;letter-spacing:-.06em;margin:12px 0 18px}h2{font-size:30px;letter-spacing:-.04em;margin:0 0 12px}h3{margin:0 0 10px}p{line-height:1.55;color:var(--muted)}.card{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:22px;box-shadow:0 8px 24px rgba(0,0,0,.04)}.grid{display:grid;grid-gap:18px;gap:18px}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.btn{display:inline-flex;align-items:center;justify-content:center;padding:11px 16px;border-radius:999px;border:1px solid var(--line);background:#fff;cursor:pointer;font-weight:700;color:var(--ink)}.btn-primary,.btn:hover{border-color:var(--accent)}.btn-primary{background:var(--accent);color:#fff}.btn-secondary{background:var(--accent-2);color:var(--accent);border-color:#c7d9cd}.btn-danger{background:#fff1f1;color:var(--danger);border-color:#e0b7b7}.stack{display:flex;gap:12px;flex-wrap:wrap;align-items:center}.form{display:grid;grid-gap:12px;gap:12px}.input,.select,.textarea{width:100%;border:1px solid var(--line);border-radius:12px;padding:12px 14px;background:#fff}.textarea{min-height:110px}.label{font-size:13px;color:var(--muted);display:grid;grid-gap:6px;gap:6px}.badge,.label{font-weight:700}.badge{display:inline-flex;padding:5px 9px;border-radius:999px;background:var(--accent-2);color:var(--accent);font-size:12px}.badge-muted{background:#eeeeea;color:var(--muted)}.table{width:100%;border-collapse:collapse;background:#fff;border-radius:14px;overflow:hidden;border:1px solid var(--line)}.table td,.table th{text-align:left;padding:12px;border-bottom:1px solid var(--line);font-size:14px}.table th{background:#f0f2ed;color:var(--muted)}.notice{border:1px solid #d8c68a;background:#fff8dc;color:#5b4710;border-radius:14px}.notice,.success{padding:14px 16px}.success{border:1px solid #a7ceb2;background:#effaf2;color:var(--success);border-radius:14px}.question-image{width:100%;max-height:640px;object-fit:contain;border:1px solid var(--line);border-radius:14px;background:#fff}.quiz-shell{display:grid;grid-template-columns:minmax(0,1fr) 360px;grid-gap:24px;gap:24px;align-items:start;max-width:1400px;margin:0 auto}.quiz-shell .card{height:100%;box-sizing:border-box}.quiz-sidebar{display:flex;flex-direction:column;height:100%}.quiz-num-grid{display:grid;grid-template-columns:repeat(5,1fr);grid-gap:6px;gap:6px}.quiz-num-grid .btn{width:100%;padding:8px 4px;font-size:13px}.option{width:100%;text-align:left;padding:14px;border-radius:12px;border:1px solid var(--line);background:#fff;cursor:pointer;margin-bottom:8px}.option.selected,.option:hover{border-color:var(--accent)}.option.selected{background:var(--accent-2)}.option.correct{border-color:var(--success);background:#effaf2}.option.wrong{border-color:var(--danger);background:#fff1f1}.kpi{font-size:28px;font-weight:800;letter-spacing:-.04em;color:var(--accent)}.quiz-page{max-width:1400px}@media (max-width:820px){.grid-2,.grid-3,.hero-grid,.quiz-shell{grid-template-columns:1fr}.nav-inner{align-items:flex-start;flex-direction:column}.quiz-page{max-width:100%}}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse}td,th{text-align:left;border-bottom:1px solid #e5e7eb;padding:10px;vertical-align:top}.muted{color:#64748b;font-size:.92rem}.check{display:flex;gap:8px;align-items:center;margin:8px 0;color:#334155}.progress{height:12px;background:#e2e8f0;border-radius:999px;overflow:hidden}.progress span{display:block;height:100%;background:#0f172a;border-radius:999px;transition:width .3s ease}.card.soft{background:#f8fafc;margin-top:12px}.badge.ok{background:#effaf2;color:var(--success)}.badge.warn{background:#fff8dc;color:var(--warning)}code{background:#f1f5f9;border:1px solid #e2e8f0;padding:2px 5px;border-radius:6px}.nav-burger{display:none;background:none;border:none;font-size:20px;cursor:pointer;color:var(--ink);padding:4px 8px}.nav-mobile-menu{display:flex;flex-direction:column;gap:4px;padding:12px 20px 16px;border-top:1px solid var(--line);background:hsla(0,0%,100%,.97)}.nav-mobile-menu a{padding:10px 4px;font-size:15px;font-weight:600;color:var(--ink);border-bottom:1px solid var(--line)}.nav-mobile-menu a:last-child{border-bottom:none;margin-top:8px;text-align:center}@media (max-width:700px){.nav-desktop{display:none!important}.nav-burger{display:flex}}.lp-hero{background:linear-gradient(135deg,#0d3d2e,#1a5c44 50%,#234b3f);padding:80px 20px 72px;overflow:hidden}.lp-hero-inner{max-width:1120px;margin:0 auto;display:grid;grid-template-columns:1.1fr .9fr;grid-gap:48px;gap:48px;align-items:center}.lp-eyebrow{display:inline-block;background:hsla(0,0%,100%,.15);color:#a7d9c0;font-size:12px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;padding:5px 12px;border-radius:999px;margin-bottom:20px}.lp-h1{font-size:clamp(36px,5vw,58px);line-height:1.07;letter-spacing:-.04em;color:#fff;margin:0 0 20px}.lp-h1-accent{color:#6ee7b7}.lp-hero-sub{font-size:18px;line-height:1.6;color:hsla(0,0%,100%,.75);margin:0 0 32px}.lp-hero-ctas{display:flex;gap:12px;flex-wrap:wrap;align-items:center}.lp-cta-main{font-size:16px;padding:14px 28px;background:#6ee7b7;color:#0d3d2e;border-color:#6ee7b7;font-weight:800;border-radius:999px}.lp-cta-main:hover{background:#4dd4a0;border-color:#4dd4a0}.lp-cta-ghost{font-size:15px;padding:13px 24px;background:transparent;color:hsla(0,0%,100%,.85);border-color:hsla(0,0%,100%,.3);border-radius:999px}.lp-cta-ghost:hover{border-color:hsla(0,0%,100%,.7);color:#fff}.lp-hero-note{font-size:13px;color:hsla(0,0%,100%,.45);margin:14px 0 0}.lp-hero-card{display:flex;justify-content:center}.lp-mock-quiz{background:#fff;border-radius:20px;padding:24px;box-shadow:0 24px 60px rgba(0,0,0,.3);max-width:400px;width:100%}.lp-mock-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}.lp-mock-topic{font-size:12px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}.lp-mock-stem{font-size:14px;color:var(--ink);line-height:1.5;margin:0 0 14px}.lp-mock-options{display:grid;grid-gap:7px;gap:7px;margin-bottom:14px}.lp-mock-opt{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;border:1.5px solid var(--line);font-size:13px;color:var(--ink);background:#fafafa}.lp-mock-opt-correct{border-color:#22c55e;background:#f0fdf4;color:#166534;font-weight:700}.lp-opt-letter{display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;border-radius:50%;background:var(--line);font-size:11px;font-weight:800;flex-shrink:0}.lp-mock-opt-correct .lp-opt-letter{background:#22c55e;color:#fff}.lp-mock-feedback{background:#f0fdf4;border:1px solid #bbf7d0;border-radius:10px;padding:10px 12px;font-size:13px;color:#166534;line-height:1.5}.lp-trust{background:#fff;border-bottom:1px solid var(--line);padding:28px 20px}.lp-trust-inner{max-width:1120px;margin:0 auto;justify-content:center;gap:0;flex-wrap:wrap}.lp-trust-inner,.lp-trust-item{display:flex;align-items:center}.lp-trust-item{flex-direction:column;padding:0 40px}.lp-trust-num{font-size:22px;font-weight:800;letter-spacing:-.04em;color:var(--accent)}.lp-trust-label{font-size:13px;color:var(--muted);margin-top:2px}.lp-trust-div{width:1px;height:36px;background:var(--line)}.lp-section{padding:72px 20px}.lp-section-tinted{background:#f4f7f5}.lp-section-inner{max-width:1120px;margin:0 auto}.lp-section-head{text-align:center;margin-bottom:48px}.lp-h2{font-size:clamp(26px,4vw,40px);letter-spacing:-.04em;margin:0 0 12px;color:var(--ink)}.lp-section-sub{font-size:17px;color:var(--muted);margin:0}.lp-topics-grid{display:grid;grid-template-columns:repeat(4,1fr);grid-gap:14px;gap:14px}.lp-topic-card{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;padding:28px 16px;border-radius:16px;border:1.5px solid transparent;text-decoration:none;transition:transform .15s,box-shadow .15s,border-color .15s}.lp-topic-card:hover{transform:translateY(-3px);box-shadow:0 8px 24px rgba(0,0,0,.1);border-color:rgba(0,0,0,.08)}.lp-topic-emoji{font-size:32px}.lp-topic-label{font-size:13px;font-weight:700;color:var(--ink);text-align:center}.lp-steps{display:flex;align-items:flex-start;gap:0}.lp-step{flex:1 1;padding:0 24px}.lp-step-arrow{font-size:24px;color:var(--accent);padding-top:20px;flex-shrink:0}.lp-step-num{width:40px;height:40px;border-radius:50%;background:var(--accent);color:#fff;font-size:18px;font-weight:800;display:flex;align-items:center;justify-content:center;margin-bottom:16px}.lp-step-title{font-size:18px;font-weight:700;margin:0 0 10px;color:var(--ink)}.lp-step-body{font-size:15px;line-height:1.6;color:var(--muted);margin:0}.lp-features{display:grid;grid-template-columns:repeat(4,1fr);grid-gap:20px;gap:20px}.lp-feature-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:28px 22px;box-shadow:0 4px 16px rgba(0,0,0,.04)}.lp-feature-icon{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:18px}.lp-feature-title{font-size:17px;font-weight:700;margin:0 0 10px;color:var(--ink)}.lp-feature-body{font-size:14px;line-height:1.6;color:var(--muted);margin:0}.lp-testimonials{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:20px;gap:20px}.lp-testimonial{background:#fff;border:1px solid var(--line);border-radius:18px;padding:28px;box-shadow:0 4px 16px rgba(0,0,0,.04);display:flex;flex-direction:column;justify-content:space-between;gap:20px}.lp-testi-quote{font-size:15px;line-height:1.7;color:var(--ink);margin:0;font-style:italic}.lp-testi-author{display:flex;align-items:center;gap:12px}.lp-testi-avatar{width:38px;height:38px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:15px;flex-shrink:0;color:var(--ink)}.lp-testi-meta{font-size:13px;color:var(--muted)}.lp-testi-stars{color:#f59e0b;font-size:15px;margin-bottom:10px;letter-spacing:2px}.lp-pricing-banner{background:linear-gradient(135deg,#f0fdf4,#e8f5e9);border:1.5px solid #bbf7d0;border-radius:24px;padding:48px 40px;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}.lp-pricing-text{flex:1 1}.lp-pricing-actions{display:flex;gap:12px;flex-wrap:wrap;align-items:center}.lp-pricing-actions .lp-cta-main{background:var(--accent);color:#fff;border-color:var(--accent)}.lp-pricing-actions .lp-cta-main:hover{background:#1a4d34;border-color:#1a4d34}.lp-pricing-actions .lp-cta-ghost{color:var(--accent);border-color:#a7d9c0}.lp-bottom-cta{background:linear-gradient(135deg,#0d3d2e,#234b3f);padding:80px 20px;text-align:center}.lp-bottom-cta-inner{max-width:640px;margin:0 auto}.lp-bottom-h2{font-size:clamp(28px,4vw,44px);letter-spacing:-.04em;color:#fff;margin:0 0 16px}.lp-bottom-sub{font-size:17px;color:hsla(0,0%,100%,.7);line-height:1.6;margin:0 0 32px}.lp-bottom-cta .lp-cta-main{background:#6ee7b7;color:#0d3d2e;border-color:#6ee7b7;font-size:16px}.lp-bottom-cta .lp-cta-main:hover{background:#4dd4a0}@media (max-width:900px){.lp-hero-inner{grid-template-columns:1fr}.lp-hero-card{display:none}.lp-features,.lp-topics-grid{grid-template-columns:repeat(2,1fr)}.lp-testimonials{grid-template-columns:1fr}.lp-steps{flex-direction:column;gap:24px}.lp-step-arrow{display:none}.lp-step{padding:0}.lp-pricing-banner{flex-direction:column;text-align:center}.lp-pricing-actions{justify-content:center}.lp-trust-item{padding:0 20px}}@media (max-width:560px){.lp-topics-grid{grid-template-columns:repeat(2,1fr)}.lp-features{grid-template-columns:1fr}.lp-trust-div{display:none}.lp-trust-inner{gap:20px}}.lp-footer{background:#0d1a14;padding:56px 20px 24px}.lp-footer-inner{max-width:1120px;margin:0 auto;display:flex;gap:48px;justify-content:space-between;flex-wrap:wrap;padding-bottom:40px;border-bottom:1px solid hsla(0,0%,100%,.08)}.lp-footer-brand{max-width:220px}.lp-footer-links{display:flex;gap:48px;flex-wrap:wrap}.lp-footer-links>div{display:flex;flex-direction:column;gap:10px}.lp-footer-heading{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:hsla(0,0%,100%,.35);margin-bottom:4px}.lp-footer-links a{font-size:14px;color:hsla(0,0%,100%,.6);transition:color .15s}.lp-footer-links a:hover{color:#fff}.lp-footer-copy{max-width:1120px;margin:24px auto 0;font-size:13px;color:hsla(0,0%,100%,.3)}.tabs{display:flex;gap:4px;border-bottom:2px solid var(--line);margin-bottom:22px}.tab{padding:10px 16px;border-radius:10px 10px 0 0;font-weight:700;font-size:14px;cursor:pointer;color:var(--muted);border:none;background:none}.tab.active{color:var(--accent);background:var(--accent-2)}.btn-sm{padding:7px 12px;font-size:13px}.topic-bar-row{display:grid;grid-template-columns:160px 1fr 48px;align-items:center;grid-gap:10px;gap:10px;padding:6px 0}.topic-bar-track{height:10px;background:#eaeee8;border-radius:999px;overflow:hidden}.topic-bar-fill{height:100%;border-radius:999px;transition:width .6s ease}.topic-label{font-size:13px;font-weight:600;color:var(--ink)}.topic-pct{font-size:13px;font-weight:700;text-align:right}.mode-cards{display:grid;grid-template-columns:1fr 1fr;grid-gap:14px;gap:14px;margin:14px 0}.mode-card{border:2px solid var(--line);border-radius:16px;padding:18px;cursor:pointer;transition:border-color .15s,background .15s;background:#fff}.mode-card:hover{border-color:#b5c9be}.mode-card.selected{border-color:var(--accent);background:var(--accent-2)}.mode-icon{font-size:28px;margin-bottom:8px;display:block}@media (max-width:820px){.mode-cards{grid-template-columns:1fr}}.p4-extract{background:#f2f5f2;border-left:4px solid #2d5a4e;border-radius:10px;padding:20px 24px;margin-bottom:22px}.p4-extract-label{font-size:11px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:#2d5a4e;margin-bottom:12px}.p4-extract-body{font-size:14px;line-height:1.78;color:#3a6b7c}.p4-table-wrap table{border-collapse:collapse;width:100%;font-size:13px}.p4-table-wrap td,.p4-table-wrap th{border:1px solid var(--line);padding:6px 10px;text-align:left;vertical-align:top}.p4-table-wrap th{background:#eaf0ee;font-weight:700}.p4-part{border:1px solid var(--line);border-radius:14px;padding:22px 24px;margin-bottom:16px;background:#fff}.mark-badge{background:#17202a;color:#fff;padding:4px 12px;border-radius:999px;font-size:12px;font-weight:700;white-space:nowrap}.marking-result{margin-top:14px;border-radius:12px;padding:14px;border:1px solid var(--line);background:#f8faf7}.reveal-btn{background:#fff8dc;border:1px solid #d8c68a;color:#5b4710;padding:8px 14px;border-radius:999px;font-size:13px;font-weight:700;cursor:pointer;margin-top:10px}.sample-answer{margin-top:12px;background:#fffdf0;border:1px solid #e8d98a;border-radius:12px;padding:14px;font-size:14px;line-height:1.7}.sample-answer h4{margin:0 0 8px;color:#5b4710;font-size:12px;text-transform:uppercase;letter-spacing:.08em}.spinner{display:inline-block;width:18px;height:18px;border:2px solid var(--line);border-top-color:var(--accent);border-radius:50%;animation:spin .7s linear infinite;vertical-align:middle}@keyframes spin{to{transform:rotate(1turn)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.45}}.p4-layout{display:grid;grid-template-columns:1fr 260px;grid-gap:32px;gap:32px;align-items:start}@media (max-width:768px){.p4-layout{grid-template-columns:1fr;gap:24px}.p4-sidebar{position:static!important;order:2}}