:root{--accent: #4f46e5;--accent-2: #6366f1;--accent-soft: #eef2ff;--ink: #14151a;--muted: #6b7280;--line: #e7e8ec;--surface: #f8f8fa;--radius: 18px;--container: 1140px;--shadow: 0 30px 70px -34px rgba(20, 21, 26, .3)}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:Inter,ui-sans-serif,system-ui,-apple-system,sans-serif;color:var(--ink);background:#fff;-webkit-font-smoothing:antialiased;line-height:1.55}.container{max-width:var(--container);margin:0 auto;padding:0 28px}h1,h2,h3{line-height:1.08;letter-spacing:-.025em}a{color:inherit;text-decoration:none}.nav{position:sticky;top:0;z-index:20;background:#fffc;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}.logo{font-weight:800;font-size:21px;letter-spacing:-.04em}.nav-links{display:flex;align-items:center;gap:28px;font-size:15px;font-weight:500}.nav-links 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18px;border-bottom:1px solid var(--line);background:var(--surface)}.mockup-brand{font-weight:800;font-size:13px;letter-spacing:-.03em}.mockup-url{font-size:12px;color:var(--muted);background:#fff;border:1px solid var(--line);border-radius:8px;padding:5px 14px}.mockup-body{display:grid;grid-template-columns:144px 1fr;min-height:326px}.mk-side{border-right:1px solid var(--line);padding:18px 14px;background:var(--surface);font-size:12px}.mk-side-title{font-weight:700;margin-bottom:12px}.mk-student{padding:9px 10px;border-radius:9px;margin-bottom:7px;color:var(--muted)}.mk-student span{display:block;font-size:10px;margin-top:2px}.mk-student.active{background:var(--accent);color:#fff;font-weight:600}.mk-student.active span{opacity:.85}.mk-add{margin-top:8px;color:var(--accent);font-weight:600}.mk-main{padding:22px}.mk-head strong{font-size:15px}.mk-head span{display:block;font-size:11px;color:var(--muted);margin-top:3px}.mk-tags{display:flex;gap:7px;margin-top:11px}.mk-tags 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p{color:var(--muted);font-size:15.5px}.card-num{font-size:13px;font-weight:700;color:var(--accent);margin-bottom:18px}.step-badge{width:40px;height:40px;border-radius:50%;background:var(--accent);color:#fff;font-weight:700;display:grid;place-items:center;margin-bottom:18px}.feature-icon{width:48px;height:48px;border-radius:14px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;margin-bottom:18px}.feature-icon svg{width:24px;height:24px}.review{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px;display:flex;flex-direction:column;justify-content:space-between;overflow:hidden}.quote-mark{position:absolute;top:6px;right:22px;font-size:80px;line-height:1;color:var(--accent-soft);font-weight:800;pointer-events:none}.quote{position:relative;font-size:17px;line-height:1.5;color:var(--ink);margin-bottom:26px}.review-author strong{display:block;font-size:14px}.review-author 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