:root {
  --paper: #fff;
  --ink: #222326;
  --charcoal: #1f2025;
  --muted: #62656a;
  --cloud: #ebf0f8;
  --blue: #415eee;
  --sky: linear-gradient(180deg, #d2e5ff 0%, #edf3fa 55%, #fff9ee 100%);
  --font: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--font); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; }
img { max-width: 100%; display: block; object-fit: cover; }
svg { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; flex-shrink: 0; }
h1, h2, h3, h4, p, figure { margin: 0; }
h1, h2, h3 { font-weight: 600; letter-spacing: -.03em; }
p { line-height: 1.8; color: var(--muted); }
a, button, summary { -webkit-tap-highlight-color: transparent; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid var(--blue); outline-offset: 5px; }
.svg-library { position: absolute; width: 0; height: 0; overflow: hidden; }
.skip-link { position: fixed; left: 24px; top: -80px; padding: 16px; background: var(--charcoal); color: white; z-index: 100; }
.skip-link:focus { top: 16px; }
.section-wrap { width: min(1200px, calc(100% - 80px)); margin-inline: auto; }
.site-header { position: absolute; top: 32px; left: 0; width: 100%; z-index: 10; padding: 0 32px; }
.nav { width: min(960px, 100%); margin: auto; display: flex; align-items: center; gap: 48px; border-radius: 40px; background: rgba(255,255,255,.92); padding: 12px 20px 12px 28px; backdrop-filter: blur(18px); }
.brand { display: flex; align-items: center; gap: 12px; }
.brand img { border-radius: 11px; }
.brand span { font-size: 28px; letter-spacing: -1.5px; font-weight: 600; }
.nav-links { display: flex; gap: 32px; align-items: center; flex: 1; }
.nav-links a { font-size: 14px; font-weight: 500; transition: color .2s; }
.nav-links a:hover { color: var(--blue); }
.button { border: 0; display: inline-flex; align-items: center; justify-content: center; gap: 16px; min-height: 52px; padding: 14px 28px; border-radius: 128px; background: var(--charcoal); color: white; font-size: 16px; font-weight: 500; line-height: 1.4; transition: transform .2s, background .2s; }
.button svg { width: 18px; height: 18px; }
.button:hover { background: #383a40; transform: translateY(-2px); }
.button-small { min-height: 42px; padding: 11px 24px; font-size: 14px; }
.button-quiet { background: rgba(255,255,255,.7); color: var(--ink); }
.button-quiet:hover { background: white; }
.hero { margin: 12px 20px 0; border-radius: 40px; background: var(--sky); padding: 138px 24px 28px; text-align: center; overflow: hidden; }
.hero h1 { font-size: clamp(48px, 5.55vw, 80px); line-height: 1.23; letter-spacing: -.045em; }
.hero-copy>p { font-size: 20px; line-height: 1.65; margin-top: 24px; }
.hero-actions { display: flex; justify-content: center; gap: 20px; margin-top: 28px; }
/* 画面内の文字や数値は再構成せず、撮影した画像全体を見せる。 */
.product-stage { position: relative; width: min(960px, 100%); height: 740px; margin: 40px auto 0; }
.hero-device { position: absolute; width: 250px; top: 92px; }
.device-main { width: 302px; left: 50%; top: 0; transform: translateX(-50%); z-index: 2; }
.device-left { left: 20px; transform: rotate(-6deg); }
.device-right { right: 20px; transform: rotate(6deg); }
.screenshot-frame { display: block; padding: 6px; background: #202329; border: 1px solid #73767c; border-radius: 42px; box-shadow: 0 20px 40px -24px #354c6c66; transition: transform .2s; }
.screenshot-frame:hover { transform: translateY(-4px); }
.screenshot-frame img { width: 100%; height: auto; aspect-ratio: 1320 / 2868; border-radius: 35px; object-fit: contain; background: #f6f9fc; }
.hero-device figcaption { font-size: 11px; color: var(--muted); margin-top: 18px; line-height: 1.8; }
.sample-note { font-size: 11px; color: var(--muted); margin-top: 0; }
.features { padding-top: 104px; }
.section-intro { text-align: center; }
.section-intro h2 { font-size: clamp(36px, 4.45vw, 64px); line-height: 1.3; }
.section-intro>p:not(.record-types) { font-size: 20px; margin-top: 24px; line-height: 1.8; }
.record-types { font-size: 14px; font-weight: 500; margin-bottom: 28px; display: flex; align-items: center; justify-content: center; gap: 24px; }
.record-types span { color: #a5a9b0; }
.mobile-break { display: none; }
.timeline-feature { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; border-radius: 32px; background: var(--cloud); margin-top: 52px; padding: 64px; }
.timeline-description h3 { font-size: 38px; line-height: 1.4; }
.timeline-description>p { font-size: 18px; line-height: 1.9; margin-top: 24px; }
.timeline-description .detail-copy { font-size: 15px; margin-top: 24px; max-width: 380px; }
.text-link { display: inline-flex; gap: 12px; align-items: center; font-size: 14px; font-weight: 500; margin-top: 32px; }
.text-link svg { width: 18px; height: 18px; }
.text-link:hover { color: var(--blue); }
.feature-screenshot { width: min(244px, 100%); margin: auto; }
.feature-screenshot .screenshot-frame { border-radius: 32px; padding: 4px; }
.feature-screenshot .screenshot-frame img { border-radius: 27px; }
.feature-screenshot figcaption { color: var(--muted); font-size: 10px; text-align: center; margin-top: 14px; line-height: 1.8; }
.timeline-screenshot { width: min(290px, 100%); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 24px; }
.feature-card { background: var(--cloud); border-radius: 24px; padding: 32px; min-width: 0; display: flex; flex-direction: column; }
.feature-card h3 { font-size: 30px; line-height: 1.4; letter-spacing: -.04em; }
.feature-card>p { font-size: 15px; line-height: 1.9; margin-top: 16px; margin-bottom: 32px; }
.feature-card .feature-screenshot { margin-top: auto; }
.feature-card>small { font-size: 10px; color: var(--muted); line-height: 1.7; margin-top: 16px; text-align: center; }
.journal { padding-top: 120px; }
.journal-photo { margin-top: 48px; width: 100%; height: 430px; border-radius: 28px; object-position: center; }
.faq { padding-top: 104px; padding-bottom: 80px; max-width: 880px; }
.faq h2 { text-align: center; font-size: 40px; line-height: 1.4; margin-bottom: 36px; }
.faq-list { border-top: 1px solid #dde2ea; }
.faq details { border-bottom: 1px solid #dde2ea; }
.faq summary { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 26px 0; font-size: 17px; line-height: 1.7; cursor: pointer; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary svg { width: 20px; height: 20px; transition: transform .2s; }
.faq details[open] summary svg { transform: rotate(45deg); }
.faq details>p { font-size: 15px; line-height: 1.9; padding: 0 44px 26px 0; }
.closing { margin: 0 20px; border-radius: 32px; background: linear-gradient(145deg, #d2e5ff, #edf3fa 60%, #fff9ee); text-align: center; padding: 48px 24px; }
.closing>img { margin: 0 auto 24px; border-radius: 16px; }
.closing h2 { font-size: 46px; line-height: 1.35; margin-bottom: 28px; }
.site-footer { padding: 36px 0; }
.footer-identity { display: flex; gap: 24px; align-items: center; }
.footer-brand { font-size: 36px; font-weight: 600; letter-spacing: -2.5px; }
.footer-identity p { font-size: 11px; border-left: 1px solid #b7bbc0; padding-left: 24px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 20px 28px; margin-top: 24px; }
.footer-links a { display: inline-flex; align-items: center; gap: 8px; font-size: 12px; color: var(--muted); }
.footer-links a:hover { color: var(--blue); }
.footer-links a:last-child { margin-left: auto; }
.footer-links svg { width: 16px; height: 16px; }
.site-footer>small { display: block; color: var(--muted); font-size: 10px; margin-top: 24px; }
@media (min-width: 1600px) {
  .hero { max-width: 1560px; margin-inline: auto; }
  .hero h1 { font-size: 80px; }
}
@media (max-width: 1100px) {
  .nav { gap: 28px; }
  .nav-links { gap: 20px; }
  .hero h1 { font-size: 64px; }
  .product-stage { height: 710px; max-width: 820px; }
  .hero-device { width: 225px; }
  .device-main { width: 285px; }
  .device-left { left: 0; }
  .device-right { right: 0; }
  .timeline-feature { padding: 40px; gap: 40px; }
  .timeline-description h3 { font-size: 30px; }
  .feature-card { padding: 24px; }
  .feature-card h3 { font-size: 25px; }
  .feature-card>p { font-size: 13px; }
  .record-types { gap: 20px; }
}
@media (max-width: 800px) {
  html { scroll-padding-top: 32px; }
  .section-wrap { width: calc(100% - 40px); }
  .site-header { top: 24px; padding: 0 28px; }
  .nav { padding: 10px 12px 10px 16px; gap: 16px; }
  .nav-links { display: none; }
  .nav>.button { margin-left: auto; }
  .brand img { width: 34px; height: 34px; border-radius: 9px; }
  .brand span { font-size: 25px; }
  .hero { margin: 12px; border-radius: 30px; padding: 124px 20px 24px; }
  .hero h1 { font-size: clamp(36px, 7.5vw, 58px); }
  .hero-copy>p { font-size: 16px; }
  .hero-actions { gap: 12px; flex-wrap: wrap; margin-top: 24px; }
  .hero-actions .button { font-size: 13px; padding: 13px 20px; min-height: 46px; gap: 10px; }
  .product-stage { height: 658px; max-width: 600px; margin-top: 32px; }
  .hero-device { width: 190px; top: 70px; }
  .device-main { width: 258px; top: 0; }
  .hero-device figcaption { font-size: 9px; }
  .sample-note { font-size: 10px; }
  .features { padding-top: 72px; }
  .record-types { font-size: 11px; gap: 12px; flex-wrap: wrap; margin-bottom: 24px; }
  .section-intro h2 { font-size: 38px; }
  .section-intro>p:not(.record-types) { font-size: 16px; margin-top: 20px; }
  .timeline-feature { grid-template-columns: 1fr 1fr; margin-top: 36px; padding: 32px; gap: 28px; }
  .timeline-description h3 { font-size: 28px; }
  .timeline-description>p { font-size: 14px; margin-top: 16px; }
  .timeline-description .detail-copy { font-size: 13px; }
  .feature-grid { grid-template-columns: 1fr; gap: 20px; margin-top: 20px; }
  .feature-card { padding: 32px; display: grid; grid-template-columns: 1fr 1fr; column-gap: 28px; align-items: center; }
  .feature-card h3 { font-size: 30px; grid-column: 1; grid-row: 1; align-self: end; }
  .feature-card>p { font-size: 14px; grid-column: 1; grid-row: 2; align-self: start; margin: 20px 0; }
  .feature-card .feature-screenshot { grid-column: 2; grid-row: 1 / span 3; width: min(220px, 100%); }
  .feature-card>small { grid-column: 1; grid-row: 3; margin-top: 0; }
  .journal { padding-top: 80px; }
  .journal-photo { height: 310px; margin-top: 32px; border-radius: 24px; }
  .faq { padding-top: 72px; padding-bottom: 64px; }
  .faq h2 { font-size: 32px; margin-bottom: 28px; }
  .faq summary { font-size: 15px; }
  .closing { margin: 0 12px; padding: 40px 20px; }
  .closing h2 { font-size: 36px; }
}
@media (max-width: 540px) {
  .hero { padding-inline: 12px; }
  .hero h1 { font-size: clamp(27px, 7.8vw, 42px); letter-spacing: -.06em; }
  .hero-copy>p { font-size: 13px; line-height: 1.9; margin-top: 20px; }
  .hero-actions { flex-direction: column; align-items: center; gap: 10px; }
  .hero-actions .button { min-width: 205px; }
  .button-quiet { background: rgba(255,255,255,.5); }
  .product-stage { height: auto; display: flex; flex-wrap: wrap; justify-content: center; gap: 26px 14px; margin-top: 32px; padding: 0 8px; }
  .hero-device { position: static; transform: none; width: calc(50% - 7px); order: 1; }
  .device-main { width: min(265px, 90%); order: 0; margin-inline: calc((100% - min(265px, 90%)) / 2); }
  .screenshot-frame { border-radius: 34px; padding: 4px; }
  .screenshot-frame img { border-radius: 29px; }
  .device-left .screenshot-frame, .device-right .screenshot-frame { border-radius: 21px; padding: 3px; }
  .device-left img, .device-right img { border-radius: 17px; }
  .hero-device figcaption { font-size: 8px; margin-top: 12px; }
  .sample-note { font-size: 8px; margin-top: 24px; }
  .record-types { gap: 9px; font-size: 10px; line-height: 1.8; }
  .section-intro h2 { font-size: 32px; }
  .mobile-break { display: block; }
  .section-intro>p:not(.record-types) { font-size: 13px; line-height: 1.9; }
  .timeline-feature { grid-template-columns: 1fr; padding: 28px 24px; border-radius: 24px; gap: 32px; }
  .timeline-description h3 { font-size: 27px; }
  .timeline-description>p { font-size: 13px; }
  .timeline-screenshot { width: min(240px, 100%); }
  .text-link { margin-top: 24px; font-size: 12px; }
  .feature-card { display: flex; padding: 28px; align-items: stretch; }
  .feature-card h3 { font-size: 29px; align-self: auto; }
  .feature-card h3 br { display: none; }
  .feature-card>p { font-size: 13px; margin: 16px 0 28px; }
  .feature-card .feature-screenshot { width: min(220px, 100%); }
  .feature-card>small { margin-top: 16px; }
  .journal .section-intro h2 { font-size: 29px; }
  .journal-photo { height: 238px; object-position: 51%; }
  .faq h2 { font-size: 28px; }
  .faq summary { font-size: 13px; padding: 23px 0; gap: 12px; }
  .faq summary svg { width: 17px; height: 17px; }
  .faq details>p { font-size: 13px; padding-right: 8px; }
  .closing h2 { font-size: 32px; }
  .closing>img { width: 52px; height: 52px; border-radius: 13px; margin-bottom: 20px; }
  .closing .button { font-size: 13px; padding: 14px 22px; }
  .footer-identity { gap: 14px; }
  .footer-brand { font-size: 30px; }
  .footer-identity p { font-size: 9px; padding-left: 14px; }
  .footer-links { gap: 18px; }
  .footer-links a { font-size: 10px; }
  .footer-links a:last-child { margin-left: 0; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}