:root {
  --fg: #1a2333; --muted: #5a6475; --bg: #ffffff; --band: #f1f5fb; --line: #dde3ec;
  --accent: #1e5faa; --accent-strong: #154a86; --on-accent: #ffffff; --card: #ffffff;
  --navy: #1a2f4e;
}
@media (prefers-color-scheme: dark) {
  :root { --fg: #e8ecf3; --muted: #9aa4b4; --bg: #141821; --band: #1b212c; --line: #323a48;
          --accent: #6fa6e8; --accent-strong: #9cc2f3; --on-accent: #0b1b33; --card: #1f2632;
          --navy: #0f1a2c; }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--fg);
  font: 17px/1.8 "Hiragino Sans", "Noto Sans JP", "Noto Sans", system-ui, -apple-system, "Segoe UI", sans-serif; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent-strong); }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 8px; background: var(--bg); padding: 8px 12px; z-index: 10; }

.top { position: sticky; top: 0; z-index: 5; background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.bar { display: flex; align-items: center; gap: 24px; min-height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--fg); font-weight: 800; font-size: 21px; }
.brand svg { width: 34px; height: 34px; }
.links { display: flex; gap: 20px; margin-right: auto; }
.links a { color: var(--fg); text-decoration: none; font-size: 15px; }
.links a:hover { color: var(--accent-strong); }
.actions { display: flex; align-items: center; gap: 12px; }

.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 20px;
  border-radius: 999px; font-weight: 700; text-decoration: none; font-size: 15px; border: 2px solid transparent; }
.btn.primary { background: var(--accent); color: var(--on-accent); }
.btn.primary:hover { background: var(--accent-strong); }
.btn.ghost { border-color: var(--accent); color: var(--accent-strong); }
.btn.big { min-height: 56px; padding: 0 28px; font-size: 17px; }
.btn:focus-visible, a:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

section { padding: 72px 0; }
.band { background: var(--band); }
h1, h2, h3, .lead, .eyebrow { word-break: auto-phrase; text-wrap: pretty; }
h1 { font-size: clamp(30px, 4.4vw, 48px); line-height: 1.3; margin: 8px 0 16px; letter-spacing: .01em; }
h2 { font-size: clamp(24px, 3vw, 32px); line-height: 1.4; margin: 0 0 28px; }
h3 { font-size: 19px; margin: 0 0 12px; line-height: 1.5; }
.eyebrow { color: var(--accent-strong); font-weight: 700; margin: 0; }
.lead { font-size: 18px; color: var(--muted); margin: 0 0 28px; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; }

.hero { padding-top: 56px; }
.hero-grid { display: grid; grid-template-columns: 1fr 1.05fr; gap: 48px; align-items: center; }

/* ヒーローのモック画面 */
.mock { margin: 0; }
.mock-win { background: var(--card); border: 1px solid var(--line); border-radius: 16px; overflow: hidden;
  box-shadow: 0 18px 50px rgba(16, 32, 64, .16); }
.mock-bar { display: flex; gap: 8px; padding: 14px 16px; background: var(--navy); }
.mock-bar span { width: 11px; height: 11px; border-radius: 50%; background: rgba(255, 255, 255, .45); }
.mock-body { padding: 22px; }
.mock-search { display: flex; align-items: center; gap: 8px; border: 1px solid var(--line); border-radius: 12px;
  padding: 13px 16px; color: var(--fg); background: var(--bg); font-size: 15px; }
.mock-search em { font-style: normal; color: var(--muted); }
.mock-ans { margin-top: 18px; border: 1px solid var(--line); border-left: 4px solid var(--accent); border-radius: 12px;
  padding: 16px 18px; background: var(--band); }
.mock-ans-h { margin: 0 0 6px; font-weight: 800; color: var(--accent-strong); font-size: 13px; letter-spacing: .04em; }
.mock-ans p { margin: 0; font-size: 15px; line-height: 1.75; }
.mock-cite { margin-top: 12px; font-size: 12.5px; color: var(--muted); border-top: 1px dashed var(--line); padding-top: 10px; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 24px; }
.card p { margin: 0; color: var(--muted); }

.steps { list-style: none; counter-reset: s; padding: 0; margin: 0; }
.steps.steps-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.steps li { counter-increment: s; position: relative; padding: 56px 0 0; }
.steps li::before { content: counter(s); position: absolute; left: 0; top: 0; width: 40px; height: 40px; border-radius: 50%;
  background: var(--accent); color: var(--on-accent); font-weight: 800; display: grid; place-items: center; }
.steps strong { display: block; font-size: 18px; margin-bottom: 4px; }
.steps span { color: var(--muted); }
.note { color: var(--muted); font-size: 15px; }
.disclaimer { color: var(--muted); font-size: 14px; margin-top: 24px; }

.apps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 12px; }
.app { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 18px 20px; display: flex; flex-direction: column; }
.app strong { font-size: 18px; }
.app span { color: var(--muted); font-size: 15px; }

.final { text-align: center; background: var(--band); }
.final h2 { margin-bottom: 20px; }

/* お問い合わせフォーム */
.wrap.narrow { max-width: 760px; }
.lead.center { text-align: center; margin-bottom: 32px; }
.contact-card { background: var(--card); border: 1px solid var(--line); border-radius: 20px;
  padding: clamp(22px, 4vw, 40px); box-shadow: 0 14px 44px rgba(16, 32, 64, .10); }
.form { display: grid; grid-template-columns: 1fr 1fr; gap: 20px 22px; }
.form .full { grid-column: 1 / -1; }
.form label { display: grid; gap: 8px; margin: 0; }
.form .lbl { display: inline-flex; align-items: center; gap: 8px; font-weight: 700; font-size: 14.5px; color: var(--fg); }
.form .req { font-size: 11px; font-weight: 700; font-style: normal; letter-spacing: .02em;
  color: var(--on-accent); background: var(--accent); border-radius: 999px; padding: 2px 9px; }
.form .opt { font-size: 11px; font-weight: 700; font-style: normal; letter-spacing: .02em;
  color: var(--muted); background: var(--band); border: 1px solid var(--line); border-radius: 999px; padding: 1px 9px; }
.form input, .form select, .form textarea { font: inherit; font-weight: 400; padding: 12px 14px; min-height: 50px;
  border: 1px solid var(--line); border-radius: 12px; background: var(--bg); color: var(--fg); width: 100%;
  transition: border-color .15s, box-shadow .15s; }
.form input::placeholder, .form textarea::placeholder { color: var(--muted); opacity: .75; }
.form input:focus, .form select:focus, .form textarea:focus { outline: none;
  border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent); }
.form select { appearance: none; -webkit-appearance: none; cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%235a6475' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 14px center; padding-right: 42px; }
.form textarea { resize: vertical; min-height: 130px; line-height: 1.7; }
.form .note { margin: 0; font-size: 13.5px; }
.form .hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.submit-row { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 18px; margin-top: 4px; }
.submit-row .btn { min-width: 200px; }
.form-msg { margin: 0; font-weight: 700; }
.form-msg.ok { color: #137333; }
.form-msg.err { color: #c5221f; }
@media (prefers-color-scheme: dark) { .form-msg.ok { color: #81c995; } .form-msg.err { color: #f28b82; } }
@media (max-width: 560px) {
  .form { grid-template-columns: 1fr; gap: 18px; }
  .submit-row .btn { width: 100%; min-width: 0; }
}

.foot { border-top: 1px solid var(--line); padding: 32px 0 40px; text-align: center; color: var(--muted); font-size: 14px; }
.foot p { margin: 4px 0; }
.foot a.copy { color: inherit; text-decoration: none; }
.foot a.copy:hover { text-decoration: underline; color: var(--accent-strong); }

@media (max-width: 900px) {
  .links { display: none; }
  .bar { justify-content: space-between; }
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .cards, .apps, .steps.steps-row { grid-template-columns: 1fr; }
  section { padding: 52px 0; }
}
@media (max-width: 420px) {
  .wrap { padding: 0 16px; }
  .brand span { display: none; }
  .btn.big { width: 100%; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }