:root {
  --bg: #ffffff;
  --surface: #f7fafc;
  --text: #132033;
  --muted: #667085;
  --line: #e6ebf2;
  --blue: #2f6fed;
  --blue-2: #174ea6;
  --green: #20a464;
  --orange: #f59e0b;
  --red: #ef4444;
  --shadow: 0 12px 32px rgba(19, 32, 51, .08);
  --radius: 8px;
  --max: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Arial, sans-serif; color: var(--text); background: var(--bg); line-height: 1.55; }
a { color: inherit; text-decoration: none; }
.container { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; }
.site-header { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); backdrop-filter: blur(14px); }
.nav { min-height: 74px; display: flex; align-items: center; gap: 24px; }
.logo { display: inline-flex; align-items: center; gap: 10px; font-size: 1.32rem; font-weight: 900; }
.logo-mark { width: 38px; height: 38px; border-radius: var(--radius); display: grid; place-items: center; background: var(--blue); color: #fff; font-weight: 950; }
.nav-links { display: flex; align-items: center; gap: 22px; margin-left: auto; color: #344054; font-weight: 800; }
.nav-links a { padding: 24px 0 21px; border-bottom: 3px solid transparent; }
.nav-links a:hover, .nav-links a.active { color: var(--blue); border-color: var(--blue); }
.nav-actions { display: flex; gap: 10px; }
.menu-toggle { display: none; width: 44px; height: 44px; margin-left: auto; border: 1px solid var(--line); background: #fff; border-radius: var(--radius); align-items: center; justify-content: center; flex-direction: column; gap: 5px; }
.menu-toggle span { width: 20px; height: 2px; background: var(--text); border-radius: 2px; }
.btn { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 0 18px; border-radius: var(--radius); border: 1px solid transparent; font-weight: 850; text-align: center; transition: .18s ease; }
.btn:hover { transform: translateY(-1px); box-shadow: 0 8px 22px rgba(19,32,51,.08); }
.btn-primary { color: #fff; background: var(--blue); border-color: var(--blue); }
.btn-primary:hover { background: var(--blue-2); }
.btn-light { background: #fff; border-color: var(--line); }
.btn-outline { color: var(--blue); background: #fff; border-color: #bfd3ff; }
.hero { background: #fff; border-bottom: 1px solid var(--line); }
.hero-grid { min-height: 540px; display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(320px, .95fr); gap: 54px; align-items: center; padding: 56px 0; }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; color: var(--blue-2); font-weight: 900; background: #eef4ff; border: 1px solid #d8e5ff; border-radius: 999px; padding: 8px 14px; }
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--green); }
h1 { margin: 16px 0 18px; font-size: clamp(2.55rem, 5vw, 4.6rem); line-height: 1.03; font-weight: 950; letter-spacing: 0; }
h2 { margin: 0 0 12px; font-size: clamp(1.85rem, 3vw, 3rem); line-height: 1.12; font-weight: 950; letter-spacing: 0; }
h3 { margin: 0 0 8px; font-size: 1.25rem; line-height: 1.25; }
.lead { color: #4b5565; font-size: 1.12rem; max-width: 720px; }
.hero-actions, .cta-row, .card-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.trust-row, .pill-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.chip, .pill { display: inline-flex; align-items: center; min-height: 32px; padding: 5px 10px; border-radius: 999px; border: 1px solid var(--line); background: #fff; color: #344054; font-weight: 800; font-size: .92rem; }
.hero-panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
.learning-path { display: grid; gap: 12px; }
.path-row { display: grid; grid-template-columns: 42px 1fr auto; gap: 12px; align-items: center; padding: 14px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.path-num { width: 42px; height: 42px; border-radius: var(--radius); display: grid; place-items: center; color: #fff; background: var(--blue); font-weight: 950; }
.path-row:nth-child(2) .path-num { background: var(--green); }
.path-row:nth-child(3) .path-num { background: var(--orange); }
.page-hero { padding: 64px 0 40px; background: #fff; border-bottom: 1px solid var(--line); }
.breadcrumb { color: var(--muted); font-weight: 800; margin-bottom: 12px; }
.section { padding: 64px 0; }
.section.soft { background: var(--surface); border-block: 1px solid var(--line); }
.section-head { max-width: 760px; margin: 0 auto 30px; text-align: center; }
.muted, .section-head p { color: var(--muted); }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 18px; }
.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; box-shadow: 0 6px 18px rgba(19,32,51,.045); }
.card:hover { border-color: #bfd3ff; box-shadow: var(--shadow); }
.card-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.badge { min-width: 42px; height: 42px; padding: 0 9px; border-radius: var(--radius); display: inline-flex; align-items: center; justify-content: center; background: #eef4ff; color: var(--blue); font-weight: 950; }
.small { color: var(--muted); font-size: .9rem; font-weight: 800; }
.list { display: grid; gap: 10px; margin-top: 16px; }
.list a, .list-row { min-height: 48px; display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 12px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); font-weight: 850; }
.list a:hover { color: var(--blue); background: #eef4ff; border-color: #bfd3ff; }
.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; margin-top: 24px; }
.stat { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; text-align: center; }
.stat strong { display: block; color: var(--blue); font-size: 2rem; line-height: 1; }
.feature-band { background: var(--text); color: #fff; border-radius: var(--radius); padding: 34px; display: grid; grid-template-columns: 1.35fr .85fr; gap: 22px; align-items: center; }
.feature-band p { color: #d7dde8; }
.progress-card { background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.2); border-radius: var(--radius); padding: 18px; }
.bar { height: 10px; border-radius: 999px; background: rgba(255,255,255,.18); overflow: hidden; margin: 12px 0; }
.bar span { display: block; height: 100%; width: 72%; background: var(--green); }
.form { display: grid; gap: 12px; }
.input, textarea, select { width: 100%; min-height: 48px; border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; font: inherit; color: var(--text); background: #fff; }
textarea { min-height: 116px; resize: vertical; }
.quiz-option { width: 100%; min-height: 52px; margin: 7px 0; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; text-align: left; padding: 12px 14px; font: inherit; font-weight: 850; cursor: pointer; }
.quiz-option.correct { background: #ecfdf3; border-color: var(--green); }
.quiz-option.wrong { background: #fff1f1; border-color: var(--red); }
.notice { margin-top: 14px; padding: 14px; border-radius: var(--radius); background: #eef4ff; border: 1px solid #bfd3ff; color: var(--blue-2); font-weight: 800; }
.hidden { display: none !important; }
.footer { background: #101828; color: #fff; padding: 40px 0; }
.footer-grid { display: grid; grid-template-columns: 1fr 2fr; gap: 28px; align-items: start; }
.footer p { color: #c9d2e3; max-width: 430px; }
.footer a { color: #e6ebf2; font-weight: 750; }
.footer-links { display: flex; flex-wrap: wrap; gap: 12px 18px; }
@media (max-width: 940px) {
  .menu-toggle { display: flex; }
  .nav { flex-wrap: wrap; }
  .nav-links, .nav-actions { display: none; width: 100%; margin-left: 0; }
  .nav.open .nav-links, .nav.open .nav-actions { display: flex; flex-direction: column; align-items: stretch; }
  .nav.open .nav-links a, .nav.open .nav-actions a { width: 100%; justify-content: center; text-align: center; padding: 12px; }
  .hero-grid, .grid-2, .feature-band, .footer-grid { grid-template-columns: 1fr; }
  .grid-3, .grid-4, .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .container { width: min(100% - 22px, var(--max)); }
  .nav { min-height: 66px; }
  .logo { font-size: 1.12rem; }
  .hero-grid { min-height: auto; padding: 34px 0; gap: 28px; }
  h1 { font-size: 2.35rem; }
  .section { padding: 46px 0; }
  .grid-3, .grid-4, .stats { grid-template-columns: 1fr; }
  .hero-actions, .cta-row, .card-actions { display: grid; grid-template-columns: 1fr; }
  .btn { width: 100%; }
  .path-row { grid-template-columns: 38px 1fr; }
  .path-row .small { grid-column: 2; }
  .feature-band { padding: 24px; }
}