:root {
  color-scheme: light;
  --paper: #f7f2e8;
  --paper-deep: #eee5d5;
  --card: #fffdf8;
  --ink: #1f281f;
  --muted: #687064;
  --forest: #294c33;
  --moss: #6e8d55;
  --clay: #b84c2f;
  --line: rgba(41, 76, 51, .15);
  --shadow: 0 24px 70px rgba(54, 61, 43, .12);
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Pretendard", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); line-height: 1.65; }
a { color: inherit; }
img { display: block; max-width: 100%; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 99; padding: 10px 14px; background: var(--forest); color: white; border-radius: 10px; }
.skip-link:focus { top: 16px; }
.shell { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }

.site-header { position: sticky; top: 0; z-index: 20; background: rgba(247, 242, 232, .94); border-bottom: 1px solid var(--line); backdrop-filter: blur(16px); }
.nav { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; font-weight: 800; letter-spacing: -.02em; }
.brand img { width: 38px; height: 38px; border-radius: 10px; }
.nav-links { display: flex; align-items: center; gap: 26px; font-size: .94rem; font-weight: 650; }
.nav-links a { text-decoration: none; color: var(--muted); }
.nav-links a:hover, .nav-links a:focus-visible { color: var(--forest); }
.nav-contact { padding: 9px 15px; border: 1px solid var(--line); border-radius: 999px; }

.hero { padding: 80px 0 72px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.02fr .98fr; align-items: center; gap: 72px; }
.eyebrow { margin: 0 0 16px; color: var(--clay); font-size: .82rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
h1, h2, h3 { margin-top: 0; letter-spacing: -.045em; line-height: 1.13; }
h1 { margin-bottom: 24px; font-size: clamp(3rem, 7vw, 5.5rem); }
h2 { margin-bottom: 18px; font-size: clamp(2rem, 4.5vw, 3.6rem); }
h3 { margin-bottom: 10px; font-size: 1.28rem; }
.hero-copy { max-width: 620px; font-size: 1.18rem; color: var(--muted); }
.hero-copy strong { color: var(--forest); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; padding: 0 20px; border-radius: 14px; border: 1px solid var(--forest); background: var(--forest); color: white; text-decoration: none; font-weight: 750; }
.button.secondary { color: var(--forest); background: transparent; }
.button[aria-disabled="true"] { cursor: default; opacity: .72; }
.trust-row { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 24px; color: var(--muted); font-size: .9rem; }
.trust-row span::before { content: "✓"; margin-right: 6px; color: var(--moss); font-weight: 900; }
.hero-visual { position: relative; min-height: 620px; }
.hero-photo { width: 88%; height: 500px; margin-left: auto; border-radius: 42px; object-fit: cover; box-shadow: var(--shadow); }
.phone-shot { position: absolute; left: 0; bottom: 0; width: 42%; max-height: 560px; object-fit: cover; object-position: top; border: 10px solid #1d211d; border-radius: 42px; box-shadow: 0 30px 80px rgba(28, 35, 26, .28); }

.section { padding: 90px 0; }
.section.alt { background: var(--card); border-block: 1px solid var(--line); }
.section-head { max-width: 760px; margin-bottom: 42px; }
.section-head p { margin: 0; color: var(--muted); font-size: 1.08rem; }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.feature { padding: 26px; border: 1px solid var(--line); border-radius: 24px; background: rgba(255, 253, 248, .65); }
.feature .icon { display: grid; place-items: center; width: 44px; height: 44px; margin-bottom: 22px; border-radius: 14px; background: var(--paper-deep); color: var(--clay); font-size: 1.25rem; font-weight: 900; }
.feature p { margin: 0; color: var(--muted); font-size: .94rem; }

.screen-grid { display: grid; grid-template-columns: 1.25fr .75fr .75fr; gap: 20px; align-items: end; }
.screen-card { overflow: hidden; min-width: 0; padding: 22px 22px 0; background: #e8e3d9; border-radius: 28px; }
.screen-card strong { display: block; margin-bottom: 15px; color: var(--forest); }
.screen-card img { width: 100%; max-height: 580px; object-fit: cover; object-position: top; border-radius: 20px 20px 0 0; box-shadow: 0 18px 48px rgba(34, 42, 32, .18); }
.screen-card.wide { grid-column: span 2; }

.platform-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.platform { position: relative; overflow: hidden; padding: 28px; min-height: 320px; background: #1f2722; color: white; border-radius: 28px; }
.platform p { color: #c7cec7; max-width: 34rem; }
.platform img { width: 100%; margin-top: 22px; max-height: 420px; object-fit: contain; object-position: center top; border-radius: 14px; }
.platform.watch { display: grid; grid-template-columns: 1fr 190px; align-items: center; }
.platform.watch img { max-height: 270px; margin: 0 auto; border-radius: 28px; }
.platform.vision { grid-column: span 2; }

.hub { display: grid; grid-template-columns: .9fr 1.1fr; gap: 56px; align-items: center; }
.hub-shot { max-height: 720px; margin: 0 auto; border: 9px solid #20231f; border-radius: 38px; box-shadow: var(--shadow); }
.bullet-list { display: grid; gap: 18px; margin: 28px 0 0; padding: 0; list-style: none; }
.bullet-list li { padding-left: 34px; position: relative; }
.bullet-list li::before { content: ""; position: absolute; left: 0; top: .45em; width: 15px; height: 15px; background: var(--moss); border-radius: 50%; box-shadow: inset 0 0 0 4px var(--paper); }
.notice { margin-top: 26px; padding: 18px 20px; border-left: 4px solid var(--clay); background: rgba(184, 76, 47, .08); color: #6f3d31; }

.cta { padding: 56px; border-radius: 32px; background: var(--forest); color: white; display: flex; justify-content: space-between; align-items: center; gap: 30px; }
.cta h2 { margin-bottom: 10px; font-size: clamp(2rem, 4vw, 3.2rem); }
.cta p { margin: 0; color: #d4dfd4; }
.cta .button { background: white; color: var(--forest); border-color: white; white-space: nowrap; }

.page-hero { padding: 72px 0 44px; border-bottom: 1px solid var(--line); }
.page-hero h1 { max-width: 840px; font-size: clamp(2.6rem, 6vw, 5rem); }
.page-hero p { max-width: 720px; font-size: 1.1rem; color: var(--muted); }
.content-wrap { display: grid; grid-template-columns: 240px minmax(0, 760px); gap: 70px; padding: 62px 0 100px; }
.toc { position: sticky; top: 100px; align-self: start; display: grid; gap: 10px; }
.toc strong { margin-bottom: 6px; font-size: .82rem; color: var(--clay); letter-spacing: .1em; }
.toc a { color: var(--muted); text-decoration: none; font-size: .93rem; }
.article section { scroll-margin-top: 100px; margin-bottom: 58px; }
.article h2 { font-size: 2rem; }
.article h3 { margin-top: 30px; }
.article p, .article li { color: #4f574d; }
.article ol, .article ul { padding-left: 1.3rem; }
.info-card { margin: 24px 0; padding: 24px; border: 1px solid var(--line); border-radius: 20px; background: var(--card); }
.info-card p:last-child { margin-bottom: 0; }
.faq { border-top: 1px solid var(--line); }
.faq details { padding: 22px 0; border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; font-weight: 750; }
.faq details p { margin-bottom: 0; }
.contact-card { display: flex; justify-content: space-between; align-items: center; gap: 24px; padding: 28px; border-radius: 22px; background: var(--forest); color: white; }
.contact-card p { color: #d4dfd4; margin: 4px 0 0; }
.contact-card a { color: white; font-weight: 800; }

.site-footer { border-top: 1px solid var(--line); padding: 40px 0; color: var(--muted); font-size: .9rem; }
.footer-grid { display: flex; justify-content: space-between; gap: 28px; align-items: flex-end; }
.footer-links { display: flex; flex-wrap: wrap; gap: 18px; }
.footer-links a { text-decoration: none; }

@media (max-width: 900px) {
  .hero-grid, .hub { grid-template-columns: 1fr; }
  .hero { padding-top: 54px; }
  .hero-visual { min-height: 540px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .screen-grid { grid-template-columns: 1fr 1fr; }
  .screen-card.wide { grid-column: span 2; }
  .platform-grid { grid-template-columns: 1fr; }
  .platform.vision { grid-column: auto; }
  .content-wrap { grid-template-columns: 1fr; gap: 30px; }
  .toc { position: static; grid-template-columns: repeat(2, 1fr); padding-bottom: 24px; border-bottom: 1px solid var(--line); }
  .toc strong { grid-column: span 2; }
}

@media (max-width: 640px) {
  .shell { width: min(100% - 28px, 1180px); }
  .nav { min-height: 64px; }
  .nav-links a:not(.nav-contact) { display: none; }
  .hero { padding: 42px 0 58px; }
  h1 { font-size: 3.05rem; }
  .hero-copy { font-size: 1.04rem; }
  .hero-visual { min-height: 430px; }
  .hero-photo { height: 360px; border-radius: 28px; }
  .phone-shot { width: 48%; border-width: 6px; border-radius: 28px; }
  .section { padding: 66px 0; }
  .feature-grid, .screen-grid { grid-template-columns: 1fr; }
  .screen-card.wide { grid-column: auto; }
  .platform { min-height: 0; padding: 22px; }
  .platform.watch { grid-template-columns: 1fr 130px; }
  .cta, .footer-grid, .contact-card { align-items: flex-start; flex-direction: column; padding: 30px; }
  .page-hero { padding-top: 52px; }
  .content-wrap { padding-top: 44px; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
@media (prefers-color-scheme: dark) {
  :root { --paper: #172019; --paper-deep: #243028; --card: #1e2821; --ink: #f4f0e7; --muted: #b8c1b6; --line: rgba(230, 239, 229, .14); }
  .site-header { background: rgba(23, 32, 25, .94); }
  .feature { background: rgba(30, 40, 33, .75); }
  .screen-card { background: #2a342d; }
  .article p, .article li { color: #c6cec4; }
  .notice { color: #efc2b5; }
}