:root {
  --orange: #d83b01;
  --orange-dark: #a72d01;
  --orange-light: #ff6b35;
  --dark: #1a1a2e;
  --gray: #6b7280;
  --light: #faf9f8;
  --white: #ffffff;
  --green: #16a34a;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(26, 26, 46, 0.10);
  --shadow-lg: 0 20px 50px rgba(26, 26, 46, 0.16);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Segoe UI', system-ui, -apple-system, Roboto, sans-serif;
  color: var(--dark);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
.container { max-width: 1140px; margin: 0 auto; padding: 0 22px; }
img { max-width: 100%; }
h1, h2, h3 { line-height: 1.15; font-weight: 800; letter-spacing: -0.02em; }
h1 { font-size: clamp(2rem, 4.5vw, 3rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.2rem); text-align: center; }
h3 { font-size: 1.1rem; }
.section-sub { text-align: center; color: var(--gray); max-width: 600px; margin: 10px auto 40px; font-size: 1.02rem; }

.topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.92); backdrop-filter: blur(10px);
  border-bottom: 1px solid #f0ebe6;
}
.topbar-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.logo img { border-radius: 9px; }
.logo-text { font-weight: 800; font-size: 1.2rem; color: var(--dark); }
.logo-text em { color: var(--orange); font-style: normal; }
.nav { display: flex; align-items: center; gap: 24px; }
.nav a { color: var(--gray); text-decoration: none; font-weight: 600; font-size: .93rem; }
.nav a:hover { color: var(--orange); }
.btn-nav { background: var(--orange); color: #fff !important; padding: 9px 19px; border-radius: 999px; font-weight: 700; }
.btn-nav:hover { box-shadow: 0 8px 20px rgba(216,59,1,.35); transform: translateY(-1px); }

.hero {
  background:
    radial-gradient(1000px 480px at 90% 0%, rgba(255,107,53,.16), transparent 60%),
    radial-gradient(800px 400px at 0% 100%, rgba(216,59,1,.10), transparent 55%),
    linear-gradient(180deg, #fff 0%, #fff8f4 100%);
  padding: 70px 0 80px;
}
.hero-inner { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 50px; align-items: center; }
.hero-badge {
  display: inline-block; background: #fff; border: 1px solid #ffd9c7;
  color: var(--orange); font-weight: 700; font-size: .82rem;
  padding: 7px 15px; border-radius: 999px; margin-bottom: 20px;
  box-shadow: 0 4px 14px rgba(216,59,1,.10);
}
.hero h1 { margin-bottom: 16px; }
.hl { color: var(--orange); }
.hero-sub { color: var(--gray); font-size: 1.1rem; margin-bottom: 28px; max-width: 520px; }

.office-strip { display: flex; align-items: center; gap: 10px; margin-bottom: 30px; }
.office-tile {
  width: 44px; height: 44px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 800; font-size: 1.15rem;
  box-shadow: 0 6px 16px rgba(0,0,0,.18);
}
.office-strip-text { color: var(--gray); font-size: .9rem; font-weight: 600; margin-left: 6px; }

.hero-features { display: flex; gap: 34px; }
.hero-feature { display: flex; flex-direction: column; }
.hero-feature strong { font-size: 1.3rem; color: var(--orange); font-weight: 800; }
.hero-feature span { color: var(--gray); font-size: .85rem; }

.dl-card {
  background: #fff; border-radius: var(--radius);
  box-shadow: var(--shadow-lg); padding: 28px;
  border: 1px solid #f0ebe6;
}
.dl-info { display: flex; align-items: center; gap: 13px; margin-bottom: 18px; }
.dl-icon { width: 44px; height: 44px; border-radius: 10px; }
.dl-meta { display: flex; flex-direction: column; }
.dl-name { font-weight: 700; font-size: .95rem; }
.dl-size { color: var(--gray); font-size: .83rem; }
.btn-dl {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  background: linear-gradient(180deg, var(--orange-light), var(--orange));
  color: #fff; text-decoration: none; font-weight: 800; font-size: 1.1rem;
  padding: 16px 22px; border-radius: 12px;
  box-shadow: 0 12px 26px rgba(216,59,1,.36);
  transition: transform .15s, box-shadow .15s;
}
.btn-dl:hover { transform: translateY(-2px); box-shadow: 0 16px 34px rgba(216,59,1,.44); }
.dl-password {
  margin-top: 14px; display: flex; align-items: center; justify-content: center; gap: 10px;
  background: #fff7ed; border: 1px dashed #fdba74; border-radius: 10px; padding: 9px 12px;
}
.pw-label { color: #9a3412; font-weight: 600; font-size: .88rem; }
.pw-code {
  font-family: 'Cascadia Code', 'Courier New', monospace;
  font-weight: 800; font-size: 1.2rem; color: #c2410c;
  letter-spacing: 2px; background: #fff; padding: 2px 11px; border-radius: 7px;
  border: 1px solid #fed7aa;
}
.dl-note { text-align: center; color: var(--gray); font-size: .82rem; margin-top: 12px; }

.features { padding: 80px 0; background: var(--light); }
.features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.feature-card {
  background: #fff; border-radius: var(--radius); padding: 26px 20px;
  box-shadow: var(--shadow); border: 1px solid #f0ebe6;
  transition: transform .2s, box-shadow .2s;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.feature-icon { font-size: 1.9rem; margin-bottom: 12px; }
.feature-card h3 { margin-bottom: 7px; }
.feature-card p { color: var(--gray); font-size: .9rem; }

.howto { padding: 80px 0; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.step {
  background: #fff; border: 1px solid #f0ebe6; border-radius: var(--radius);
  padding: 28px 24px; box-shadow: var(--shadow);
}
.step-num {
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--orange); color: #fff; font-weight: 800; font-size: 1.15rem;
  display: flex; align-items: center; justify-content: center; margin-bottom: 14px;
  box-shadow: 0 8px 18px rgba(216,59,1,.32);
}
.step h3 { margin-bottom: 7px; }
.step p { color: var(--gray); font-size: .92rem; }

.versions { padding: 80px 0; background: var(--light); }
.versions-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; max-width: 840px; margin: 0 auto; }
.version-card {
  background: #fff; border-radius: var(--radius); padding: 24px 24px;
  box-shadow: var(--shadow); border: 1px solid #f0ebe6;
}
.version-card h3 { color: var(--orange); margin-bottom: 8px; font-size: 1.05rem; }
.version-card p { color: var(--gray); font-size: .9rem; }

.faq { padding: 80px 0; }
.faq-list { max-width: 760px; margin: 0 auto; }
.faq-item {
  background: #fff; border: 1px solid #f0ebe6; border-radius: 12px;
  margin-bottom: 11px; overflow: hidden; box-shadow: 0 4px 14px rgba(26,26,46,.05);
}
.faq-item summary {
  padding: 17px 21px; font-weight: 700; cursor: pointer; list-style: none;
  display: flex; align-items: center; justify-content: space-between; font-size: 1rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 1.3rem; color: var(--orange); font-weight: 800; transition: transform .2s; }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item summary:hover { color: var(--orange); }
.faq-item p { padding: 0 21px 18px; color: var(--gray); font-size: .93rem; }

.cta-final {
  background: linear-gradient(135deg, var(--orange-dark), var(--orange) 60%, var(--orange-light));
  padding: 80px 0; text-align: center; color: #fff;
}
.cta-inner h2 { color: #fff; margin-bottom: 12px; }
.cta-inner p { max-width: 540px; margin: 0 auto 30px; color: rgba(255,255,255,.92); font-size: 1.05rem; }
.btn-dl-lg {
  display: inline-flex; background: #fff; color: var(--orange);
  font-size: 1.2rem; padding: 18px 36px;
  box-shadow: 0 16px 40px rgba(0,0,0,.26);
}
.btn-dl-lg:hover { box-shadow: 0 20px 48px rgba(0,0,0,.32); }
.dl-password-cta { display: inline-flex; margin-top: 18px; background: rgba(255,255,255,.14); border: 1px dashed rgba(255,255,255,.5); }
.dl-password-cta .pw-label { color: #fff; }
.dl-password-cta .pw-code { background: rgba(255,255,255,.2); color: #fff; border-color: rgba(255,255,255,.4); }

.footer { background: var(--dark); color: #cbd5e1; padding: 50px 0 28px; }
.footer-inner { text-align: center; }
.footer-brand { display: flex; align-items: center; justify-content: center; gap: 9px; font-weight: 800; font-size: 1.15rem; color: #fff; margin-bottom: 11px; }
.footer-brand img { border-radius: 8px; }
.footer-desc { max-width: 460px; margin: 0 auto 20px; font-size: .92rem; color: #94a3b8; }
.footer-links { display: flex; justify-content: center; gap: 24px; margin-bottom: 20px; }
.footer-links a { color: #cbd5e1; text-decoration: none; font-size: .9rem; font-weight: 600; }
.footer-links a:hover { color: var(--orange-light); }
.footer-copy { font-size: .83rem; color: #64748b; }

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 36px; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; }
  .versions-grid { grid-template-columns: 1fr; }
  .nav a:not(.btn-nav) { display: none; }
}
@media (max-width: 560px) {
  .features-grid { grid-template-columns: 1fr; }
  .hero { padding: 50px 0 60px; }
  .hero-features { gap: 22px; }
}