:root{--paper:#FAFAF7;--paper-dim:#F1F0EA;--ink:#24292E;--ink-soft:#5B6270;--editor:#1E1E2E;--editor-line:#2A2A3D;--blue:#4C6EF5;--green:#2F9E44;--amber:#F59F00;--border:#E3E1D8;--radius:8px;--maxw:1240px}*{box-sizing:border-box}body{background:var(--paper);color:var(--ink);font-family:'Inter',sans-serif;line-height:1.6;margin:0}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}ul{list-style:none;margin:0;padding:0}.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}.mono{font-family:'JetBrains Mono',monospace}.btn{padding:11px 20px;border-radius:6px;font-family:'JetBrains Mono',monospace;font-size:13px;font-weight:600;display:inline-block;border:none;cursor:pointer}.btn-primary{background:var(--blue);color:#fff}.btn-ghost{border:1.5px solid #3A3A54;color:#fff}.btn-outline{border:1.5px solid var(--border);color:var(--ink)}.btn-dark{background:var(--editor);color:#fff}.topbar-strip{background:#16161f;color:#8A8CA3;font-family:'IBM Plex Mono',monospace;font-size:11.5px}.topbar-strip .wrap{display:flex;justify-content:space-between;align-items:center;padding:7px 24px}.topbar-strip a:hover{color:#fff}.site-header{background:var(--editor);color:#E8E8F0}.topbar{display:flex;align-items:center;justify-content:space-between;padding:14px 24px;max-width:var(--maxw);margin:0 auto}.brand{display:flex;align-items:center;gap:10px;font-family:'JetBrains Mono',monospace;font-weight:800;font-size:19px}.brand img{height:32px}.brand .dot{color:var(--green)}.brand .cursor{display:inline-block;width:2px;height:16px;background:var(--blue);animation:blink 1.1s steps(1) infinite}@keyframes blink{50%{opacity:0}}.main-nav ul{display:flex;gap:26px}.main-nav a{font-size:13.5px;color:#B9BACD}.main-nav a:hover{color:#fff}.header-actions{display:flex;align-items:center;gap:14px}.hero-slider{background:linear-gradient(180deg,var(--editor) 0%,#262638 100%);color:#fff;padding:64px 24px;text-align:center}.hero-slider .kicker{font-family:'IBM Plex Mono',monospace;font-size:12px;color:var(--green);text-transform:uppercase;letter-spacing:.08em;margin-bottom:14px}.hero-slider h1{font-family:'JetBrains Mono',monospace;font-size:40px;font-weight:800;margin:0 0 16px;max-width:760px;margin-left:auto;margin-right:auto;line-height:1.2}.hero-slider h1 .hl{color:var(--blue)}.hero-slider p{color:#B9BACD;max-width:520px;margin:0 auto 26px;font-size:15px}.trust-intro{max-width:var(--maxw);margin:0 auto;padding:48px 24px;display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.trust-item{text-align:center}.trust-item .ico{width:52px;height:52px;margin:0 auto 14px;border-radius:12px;background:rgb(76 110 245 / .08);color:var(--blue);display:flex;align-items:center;justify-content:center;font-size:22px}.trust-item h3{font-family:'JetBrains Mono',monospace;font-size:16px;margin:0 0 8px}.trust-item p{font-size:13px;color:var(--ink-soft);margin:0}.section{padding:52px 24px;max-width:var(--maxw);margin:0 auto}.section-head{margin-bottom:30px}.section-head .kicker{font-family:'IBM Plex Mono',monospace;font-size:11.5px;color:var(--green);text-transform:uppercase;letter-spacing:.08em;margin-bottom:6px}.section-head h2{font-family:'JetBrains Mono',monospace;font-size:26px;font-weight:800;margin:0 0 6px}.section-head p{color:var(--ink-soft);font-size:14px;max-width:520px}.section-head-row{display:flex;justify-content:space-between;align-items:flex-end}.course-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.course-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.course-card .thumb{aspect-ratio:4/3;background:var(--editor);position:relative;overflow:hidden}.course-card .thumb img{width:100%;height:100%;object-fit:cover}.course-card .cat-tag{position:absolute;top:10px;left:10px;background:rgb(30 30 46 / .85);color:#fff;font-family:'IBM Plex Mono',monospace;font-size:10px;padding:4px 9px;border-radius:20px}.course-card .price-tag{position:absolute;top:10px;right:10px;background:var(--green);color:#fff;font-family:'IBM Plex Mono',monospace;font-size:10px;font-weight:700;padding:4px 9px;border-radius:20px}.course-card .body{padding:16px}.course-card .instructor{display:flex;align-items:center;gap:8px;margin-bottom:10px}.course-card .instructor img{width:24px;height:24px;border-radius:50%;object-fit:cover}.course-card .instructor span{font-size:12px;color:var(--ink-soft)}.course-card h3{font-family:'JetBrains Mono',monospace;font-size:15px;line-height:1.35;margin:0 0 10px}.course-card .meta{display:flex;gap:14px;font-size:11.5px;color:var(--ink-soft);border-top:1px solid var(--paper-dim);padding-top:10px}.access-banner{background:var(--editor);border-radius:12px;padding:40px;text-align:center;color:#fff;max-width:var(--maxw);margin:0 auto 20px}.access-banner .kicker{color:var(--amber);font-family:'IBM Plex Mono',monospace;font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;margin-bottom:10px}.access-banner h2{font-family:'JetBrains Mono',monospace;font-size:24px;margin:0 0 8px}.access-banner p{color:#B9BACD;margin-bottom:20px}.category-icon-row{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}.category-icon-item{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:20px 14px;text-align:center}.category-icon-item .ico{font-family:'JetBrains Mono',monospace;font-weight:800;font-size:20px;width:44px;height:44px;margin:0 auto 10px;border-radius:10px;background:var(--paper-dim);display:flex;align-items:center;justify-content:center}.category-icon-item span{font-size:12.5px;font-weight:600}.cert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.cert-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:18px;text-align:center}.cert-card .badge{width:56px;height:56px;margin:0 auto 12px;border-radius:50%;background:linear-gradient(135deg,var(--blue),#7048E8);display:flex;align-items:center;justify-content:center;color:#fff;font-size:22px}.cert-card h4{font-family:'JetBrains Mono',monospace;font-size:13px;margin:0}.ad-section{padding:0 24px;max-width:var(--maxw);margin:0 auto 52px}.ad-panel{background:var(--editor);border-radius:10px;overflow:hidden}.ad-panel .head{padding:9px 16px;background:#181824;font-family:'IBM Plex Mono',monospace;font-size:10.5px;color:#6B7089;display:flex;justify-content:space-between}.ad-panel .slot{min-height:110px;display:flex;align-items:center;justify-content:center;padding:16px}.ad-panel .slot .widget{width:100%}.ad-panel .slot .placeholder{color:#4A4A63;font-family:'IBM Plex Mono',monospace;font-size:11px;border:1px dashed #34344A;border-radius:6px;padding:30px;text-align:center;width:100%}.event-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.event-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.event-card .thumb{aspect-ratio:16/10;background:var(--editor);position:relative}.event-card .thumb img{width:100%;height:100%;object-fit:cover}.event-card .status{position:absolute;top:10px;left:10px;background:var(--blue);color:#fff;font-family:'IBM Plex Mono',monospace;font-size:10px;padding:4px 9px;border-radius:20px}.event-card .date-box{position:absolute;bottom:-18px;right:14px;background:#fff;border:1px solid var(--border);border-radius:6px;text-align:center;padding:6px 10px;font-family:'JetBrains Mono',monospace}.event-card .date-box .day{font-size:16px;font-weight:800;line-height:1}.event-card .date-box .mon{font-size:9px;color:var(--ink-soft);text-transform:uppercase}.event-card .body{padding:24px 16px 16px}.event-card h3{font-family:'JetBrains Mono',monospace;font-size:15px;margin:0 0 8px}.event-card .meta{font-size:12px;color:var(--ink-soft);margin-bottom:10px}.event-card p{font-size:13px;color:var(--ink-soft);margin-bottom:10px}.testimonial-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.testimonial-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:22px}.testimonial-card p{font-size:13.5px;color:var(--ink-soft);margin-bottom:16px}.testimonial-who{display:flex;align-items:center;gap:10px}.testimonial-who img{width:36px;height:36px;border-radius:50%;object-fit:cover}.testimonial-who strong{display:block;font-size:13px}.testimonial-who span{font-size:11.5px;color:var(--ink-soft)}.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.news-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.news-card .thumb{aspect-ratio:16/10;background:var(--editor)}.news-card .thumb img{width:100%;height:100%;object-fit:cover}.news-card .body{padding:16px}.news-card .cat{font-family:'IBM Plex Mono',monospace;font-size:10.5px;color:var(--blue);text-transform:uppercase;margin-bottom:8px}.news-card h3{font-family:'JetBrains Mono',monospace;font-size:15px;line-height:1.4;margin:0 0 10px}.news-card .excerpt{font-size:13px;color:var(--ink-soft);margin-bottom:10px}.news-card .meta{font-size:11.5px;color:var(--ink-soft);border-top:1px solid var(--paper-dim);padding-top:10px}.newsletter{background:var(--paper-dim);border-radius:12px;padding:44px;text-align:center;max-width:var(--maxw);margin:0 auto 60px}.newsletter h2{font-family:'JetBrains Mono',monospace;font-size:24px;margin:0 0 8px}.newsletter p{color:var(--ink-soft);margin-bottom:22px}.newsletter form{display:flex;gap:10px;max-width:420px;margin:0 auto}.newsletter input[type=email]{flex:1;padding:12px 14px;border-radius:6px;border:1px solid var(--border);font-size:13.5px}.site-footer{background:var(--editor);color:#B9BACD;padding:56px 24px 24px}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;max-width:var(--maxw);margin:0 auto 32px}.footer-grid .brand{color:#fff;margin-bottom:12px}.footer-grid p{font-size:13px;color:#8A8CA3}.footer-col h4{font-family:'IBM Plex Mono',monospace;font-size:11.5px;text-transform:uppercase;letter-spacing:.06em;color:#8A8CA3;margin:0 0 14px}.footer-col li{margin-bottom:9px;font-size:13px}.footer-col a:hover{color:#fff}.footer-bottom{border-top:1px solid #34344A;padding-top:20px;text-align:center;font-family:'IBM Plex Mono',monospace;font-size:11.5px;color:#6B7089;max-width:var(--maxw);margin:0 auto}.lesson-layout{display:grid;grid-template-columns:220px 1fr 300px;gap:0;max-width:var(--maxw);margin:0 auto}.lesson-toc{padding:28px 16px;border-right:1px solid var(--border)}.lesson-toc .group-label{font-family:'IBM Plex Mono',monospace;font-size:10.5px;color:var(--ink-soft);text-transform:uppercase;letter-spacing:.06em;margin:18px 0 8px}.lesson-toc a{display:flex;align-items:center;gap:8px;font-size:13px;padding:6px 8px;border-radius:4px;color:var(--ink-soft)}.lesson-toc a.current{background:rgb(76 110 245 / .08);color:var(--blue);font-weight:600}.lesson-toc .dot{width:5px;height:5px;border-radius:50%;background:var(--border);flex-shrink:0}.lesson-content{padding:32px 40px;border-right:1px solid var(--border)}.lesson-content h1{font-family:'JetBrains Mono',monospace;font-size:30px;font-weight:800;margin:0 0 10px}.lesson-meta{display:flex;gap:16px;font-family:'IBM Plex Mono',monospace;font-size:11.5px;color:var(--ink-soft);margin-bottom:24px;padding-bottom:20px;border-bottom:1px solid var(--border)}.lesson-content .entry-content{font-size:15px}.lesson-content .entry-content p{margin-bottom:16px;color:#3A3F47}.lesson-content .entry-content h2{font-family:'JetBrains Mono',monospace;font-size:19px;font-weight:700;margin:28px 0 12px}.lesson-content .entry-content pre{background:var(--editor);color:#B9BACD;padding:16px;border-radius:6px;overflow-x:auto;font-family:'IBM Plex Mono',monospace;font-size:13px;line-height:1.85}.lesson-content .entry-content code{font-family:'IBM Plex Mono',monospace;background:var(--paper-dim);padding:2px 6px;border-radius:4px;font-size:13px;color:#C2255C}.lesson-rail{padding:28px 16px}.rail-card{background:#fff;border:1px solid var(--border);border-radius:6px;padding:14px;margin-bottom:18px}.rail-card h3{font-family:'JetBrains Mono',monospace;font-size:12px;margin:0 0 10px;color:var(--ink-soft)}.sticky-ad{position:sticky;top:16px}@media(max-width:1000px){.trust-intro{grid-template-columns:1fr}.course-grid,.news-grid,.event-grid,.testimonial-grid{grid-template-columns:repeat(2,1fr)}.category-icon-row,.cert-grid{grid-template-columns:repeat(3,1fr)}.footer-grid{grid-template-columns:1fr 1fr}.lesson-layout{grid-template-columns:1fr}.lesson-toc,.lesson-rail{display:none}.lesson-content{border-right:none}.main-nav{display:none}}