:root { --ink:#15213b; --muted:#68748b; --line:#e7eaf1; --paper:#fff; --sky:#edf3ff; --blue:#3d5afe; --violet:#7157d9; --mint:#dff6ed; --orange:#fff0d9; --red:#f8dedf; --radius:22px; }
*{box-sizing:border-box} body{margin:0;background:#fbfcff;color:var(--ink);font:16px/1.5 Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif} button,a{font:inherit} button{cursor:pointer} a{color:inherit;text-decoration:none}.shell{max-width:1180px;margin:auto;padding:0 24px}.topbar{height:76px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{font-size:20px;font-weight:800;letter-spacing:-.04em;display:flex;align-items:center;gap:10px}.brand-mark{height:34px;width:34px;display:grid;place-items:center;background:var(--blue);border-radius:11px;color:#fff;font-weight:900}.nav{display:flex;align-items:center;gap:24px;color:#4b5870;font-size:14px;font-weight:600}.button{border:0;border-radius:12px;padding:12px 17px;font-weight:750;display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:.2s transform,.2s background}.button:hover{transform:translateY(-1px)}.button.primary{background:var(--blue);color:#fff}.button.soft{background:#fff;color:var(--ink);box-shadow:0 0 0 1px var(--line)}.button.ghost{background:transparent;color:#34415a;padding-left:0}.hero{padding:70px 0 58px;display:grid;grid-template-columns:1.05fr .95fr;gap:58px;align-items:center}.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 10px;border-radius:99px;background:var(--mint);font-size:13px;font-weight:750;color:#18654f}.eyebrow i{display:block;width:7px;height:7px;background:#1ca77a;border-radius:50%}h1{font-size:clamp(39px,5.5vw,68px);line-height:1.03;letter-spacing:-.065em;margin:18px 0 18px;max-width:640px}h1 em{font-style:normal;color:var(--blue)}.hero p{color:var(--muted);font-size:19px;max-width:540px;margin:0 0 25px}.hero-actions{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.small-note{font-size:13px;color:#7c879a;margin-top:16px}.lesson-card{border-radius:28px;background:#fff;padding:16px;box-shadow:0 24px 60px #29395a18;border:1px solid #e9edf7;transform:rotate(1.2deg)}.windowbar{height:35px;display:flex;align-items:center;gap:6px;padding:0 5px}.dot{width:8px;height:8px;border-radius:50%;background:#dde1e9}.lesson-head{display:flex;justify-content:space-between;align-items:flex-start;padding:12px 14px}.student{display:flex;gap:10px;align-items:center}.avatar{width:35px;height:35px;background:#fae7ce;border-radius:50%;display:grid;place-items:center;font-size:17px}.student strong,.student span{display:block}.student span{font-size:12px;color:#798499}.online{font-size:12px;color:#16825f;background:#e5f8ef;padding:4px 8px;border-radius:7px}.board{height:265px;border-radius:17px;background:#f6f9ff;border:1px solid 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#263a6b12;transform:translateY(-2px)}.q-icon{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;background:var(--sky);font-size:20px}.quick-card strong,.quick-card small{display:block}.quick-card small{color:#7c8799;font-size:13px}.section{padding:78px 0}.section.alt{background:#f2f6ff}.section h2{font-size:clamp(30px,4vw,44px);line-height:1.08;letter-spacing:-.05em;margin:0 0 12px}.section-lede{color:var(--muted);font-size:18px;max-width:610px;margin:0}.task-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:32px}.task{background:#fff;border-radius:20px;padding:25px;min-height:260px;border:1px solid #edf0f6;display:flex;flex-direction:column}.task-icon{font-size:30px;width:56px;height:56px;background:var(--sky);border-radius:18px;display:grid;place-items:center}.task:nth-child(2) .task-icon{background:var(--orange)}.task:nth-child(3) .task-icon{background:#eeeaff}.task h3{font-size:21px;letter-spacing:-.03em;margin:20px 0 8px}.task 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