:root {
  --bg: #ffffff;
  --soft: #f3f7ff;
  --disc: #e4edff;
  --line: #d9e4fa;
  --blue: #1b5cff;
  --blue-d: #1348cc;
  --ink: #0a1a3f;
  --muted: #5a6a8c;
  --err: #d62f4b;
}
* { box-sizing: border-box; margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.55;
  -webkit-tap-highlight-color: transparent;
  overflow-x: hidden;
}
h1, h2, h3 { text-wrap: balance; }

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(100% - 32px, 1040px);
  margin: 0 auto;
  padding-top: max(18px, env(safe-area-inset-top));
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
  text-decoration: none;
}
.mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: var(--blue);
}
.nav { display: none; gap: 28px; }
.nav a {
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
}
.nav a:hover { color: var(--blue); }

.hero {
  display: grid;
  gap: 24px;
  align-items: center;
  width: min(100% - 32px, 1040px);
  margin: 0 auto;
  padding: 36px 0 56px;
}
h1 {
  font-size: clamp(2.2rem, 8vw, 3.6rem);
  font-weight: 800;
  line-height: 1.07;
  letter-spacing: -0.035em;
}
.lead {
  max-width: 46ch;
  margin: 16px 0 28px;
  color: var(--muted);
  font-size: 1.08rem;
}

.field {
  display: flex;
  gap: 8px;
  max-width: 560px;
  padding: 8px;
  border: 2px solid var(--line);
  border-radius: 18px;
  background: #fff;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.field:focus-within {
  border-color: var(--blue);
  box-shadow: 0 0 0 5px rgba(27, 92, 255, 0.12);
}
.field input {
  flex: 1;
  min-width: 0;
  padding: 12px;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-size: 16px;
  font-weight: 500;
}
.field input::placeholder { color: #9aa8c7; }
.field button {
  min-height: 48px;
  padding: 0 20px;
  border: 0;
  border-radius: 12px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s, transform 0.05s;
}
.ghost { background: var(--soft); color: var(--blue); }
.ghost:hover { background: #e6eeff; }
.primary { background: var(--blue); color: #fff; }
.primary:hover { background: var(--blue-d); }
.primary:active { transform: scale(0.98); }
.primary:disabled { cursor: progress; opacity: 0.8; }
.primary.loading::before {
  content: "";
  display: inline-block;
  width: 14px;
  height: 14px;
  margin-right: 8px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: #fff;
  border-radius: 50%;
  vertical-align: -2px;
  animation: spin 0.7s linear infinite;
}
button:focus-visible, a:focus-visible, summary:focus-visible {
  outline: 3px solid rgba(27, 92, 255, 0.45);
  outline-offset: 2px;
}
.note {
  min-height: 1.5em;
  margin-top: 14px;
  color: var(--muted);
  font-size: 0.95rem;
}
.note.err { color: var(--err); }

.card {
  max-width: 560px;
  margin-top: 8px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 18px 40px -24px rgba(27, 92, 255, 0.35);
  animation: rise 0.25s ease;
}
.meta {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: var(--soft);
}
.meta img {
  width: 48px;
  height: 48px;
  flex: none;
  border-radius: 50%;
  background: var(--line);
  object-fit: cover;
}
.meta b { overflow-wrap: anywhere; font-weight: 700; }
.caption {
  display: -webkit-box;
  padding: 16px 16px 0;
  overflow: hidden;
  color: var(--muted);
  font-size: 0.95rem;
  overflow-wrap: anywhere;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
}
.actions { display: grid; gap: 10px; padding: 16px; }
.dl {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 52px;
  padding: 12px 16px;
  border: 1.5px solid var(--blue);
  border-radius: 12px;
  background: var(--blue);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  transition: background 0.15s;
}
.dl:hover { background: var(--blue-d); }
.dl.alt { background: #fff; color: var(--blue); }
.dl.alt:hover { background: var(--soft); }
.dl small { font-size: 0.8rem; font-weight: 600; opacity: 0.8; }

.visual {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 360px;
}
.disc {
  position: absolute;
  width: min(100%, 340px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--disc);
}
.phone {
  position: relative;
  width: 176px;
  aspect-ratio: 9 / 18;
  border: 8px solid var(--ink);
  border-radius: 32px;
  background: var(--ink);
  box-shadow: 0 28px 48px -18px rgba(27, 92, 255, 0.45);
}
.phone::before {
  content: "";
  position: absolute;
  top: 4px;
  left: 50%;
  z-index: 2;
  width: 44px;
  height: 6px;
  margin-left: -22px;
  border-radius: 6px;
  background: #1c2d57;
}
.screen {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  overflow: hidden;
  border-radius: 24px;
  background: var(--blue);
}
.play {
  display: grid;
  place-items: center;
  width: 62px;
  height: 62px;
  padding-left: 4px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.22);
}
.wm {
  position: absolute;
  left: 14px;
  bottom: 36px;
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  text-decoration: line-through;
  text-decoration-thickness: 2px;
  opacity: 0.9;
}
.bar {
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 18px;
  height: 4px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.3);
}
.bar i { display: block; width: 42%; height: 100%; border-radius: 4px; background: #fff; }
.chip {
  position: absolute;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  box-shadow: 0 10px 22px -10px rgba(10, 26, 63, 0.3);
  font-size: 0.85rem;
  font-weight: 700;
  animation: pop 0.5s 0.3s both cubic-bezier(0.2, 1.4, 0.4, 1);
}
.c1 { left: 0; top: 20%; color: var(--blue); }
.c2 { right: 2%; bottom: 30%; animation-delay: 0.5s; }
.c3 { left: 10%; bottom: 12%; animation-delay: 0.7s; }

.band { background: var(--soft); }
.wrap {
  width: min(100% - 32px, 1040px);
  margin: 0 auto;
  padding: 56px 0;
}
.wrap.narrow { max-width: 720px; }
.wrap h2 {
  font-size: clamp(1.6rem, 5vw, 2.3rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.028em;
}
.sub { margin-top: 10px; color: var(--muted); }
h3 { font-size: 1.05rem; font-weight: 700; }

.steps {
  display: grid;
  gap: 24px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}
.steps li { display: flex; gap: 16px; }
.n {
  display: grid;
  flex: none;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
  font-weight: 800;
}
.steps p, .f p { margin-top: 4px; color: var(--muted); }

.feat {
  margin-top: 32px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #fff;
}
.f { display: flex; gap: 16px; padding: 22px; }
.f + .f { border-top: 1px solid var(--line); }
.ic {
  display: grid;
  flex: none;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--soft);
  color: var(--blue);
}

.faq { margin-top: 24px; border-top: 1px solid var(--line); }
details { border-bottom: 1px solid var(--line); }
summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 0;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}
summary::-webkit-details-marker { display: none; }
summary::after {
  content: "+";
  color: var(--blue);
  font-size: 1.5rem;
  line-height: 1;
  transition: transform 0.2s;
}
details[open] summary::after { transform: rotate(45deg); }
details p { max-width: 60ch; padding-bottom: 18px; color: var(--muted); }

.cta { background: var(--blue); color: #fff; text-align: center; }
.cta .wrap { display: grid; justify-items: center; gap: 24px; padding: 56px 0; }
.white {
  display: inline-flex;
  align-items: center;
  min-height: 52px;
  padding: 0 28px;
  border-radius: 14px;
  background: #fff;
  color: var(--blue);
  font-weight: 800;
  text-decoration: none;
  transition: transform 0.1s;
}
.white:active { transform: scale(0.98); }
.cta a:focus-visible { outline-color: #fff; }

.foot {
  width: min(100% - 32px, 560px);
  margin: 0 auto;
  padding: 28px 0 max(28px, env(safe-area-inset-bottom));
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes rise { from { opacity: 0; transform: translateY(8px); } }
@keyframes pop { from { opacity: 0; transform: scale(0.8); } }

@media (max-width: 520px) {
  .field { flex-wrap: wrap; }
  .field input { flex: 1 1 100%; }
  .field button { flex: 1; }
  .visual { min-height: 330px; }
  .phone { width: 160px; }
}

@media (min-width: 720px) {
  .nav { display: flex; }
  .steps { grid-template-columns: repeat(3, 1fr); gap: 32px; }
  .steps li { flex-direction: column; }
  .feat { display: grid; grid-template-columns: 1fr 1fr; }
  .f + .f { border-top: 0; }
  .f:nth-child(n + 3) { border-top: 1px solid var(--line); }
  .f:nth-child(even) { border-left: 1px solid var(--line); }
  .f:last-child:nth-child(odd) { grid-column: 1 / -1; }
  .wrap { padding: 80px 0; }
}

@media (min-width: 880px) {
  .hero { grid-template-columns: 1.1fr 0.9fr; gap: 48px; padding: 56px 0 72px; }
  .visual { min-height: 440px; }
  .phone { width: 210px; }
  .disc { width: 400px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}