/* 日本語を文節の切れ目で改行する。Chrome以外では無視されるだけなので安全 */
body { word-break: auto-phrase; }

:root {
  --navy: #18344a;
  --blue: #2d678b;
  --pale: #eaf1f3;
  --ink: #21303a;
  --muted: #667784;
  --line: #cfd9de;
  --white: #ffffff;
  --shadow: 0 12px 30px rgba(22, 48, 66, .1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--white); font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif; line-height: 1.8; }
a { color: inherit; }
.container { width: min(1120px, calc(100% - 48px)); margin: 0 auto; }
.narrow { width: min(800px, calc(100% - 48px)); }
.site-header { position: sticky; top: 0; z-index: 10; background: rgba(255,255,255,.96); border-bottom: 1px solid #e1e7ea; }
.header-inner, .footer-inner { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand { margin: 0; color: var(--navy); font-size: 1.05rem; font-weight: 800; letter-spacing: .05em; text-decoration: none; }
.brand span { display: block; margin-top: -7px; font-size: .73rem; letter-spacing: .15em; }
.header-link { display: inline-flex; align-items: center; gap: 7px; color: var(--blue); font-size: .86rem; font-weight: 700; text-decoration: none; }
.header-link svg, .button svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 2; }
.hero { overflow: hidden; background: linear-gradient(120deg, #f2f7f7 0%, #e4eff0 100%); }
.hero-grid { min-height: 580px; display: grid; grid-template-columns: 1.04fr .96fr; align-items: center; gap: 64px; }
.hero-copy { padding: 72px 0; }
.eyebrow, .section-label { margin: 0 0 14px; color: var(--blue); font-size: .82rem; font-weight: 800; letter-spacing: .12em; }
h1, h2, h3 { margin-top: 0; color: var(--navy); line-height: 1.38; }
h1 { margin-bottom: 24px; font-size: clamp(2rem, 4vw, 3.55rem); letter-spacing: .03em; }
h2 { margin-bottom: 28px; font-size: clamp(1.65rem, 3vw, 2.45rem); letter-spacing: .02em; }
h3 { font-size: 1.1rem; }
.lead { max-width: 520px; margin-bottom: 30px; font-size: 1.03rem; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 12px; min-height: 54px; padding: 12px 22px; border: 1px solid transparent; border-radius: 2px; font-size: .95rem; font-weight: 800; text-decoration: none; transition: transform .2s, background .2s; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: var(--white); background: var(--navy); }
.button-primary:hover { background: #0d2638; }
.video-count { margin: 17px 0 0; color: var(--muted); font-size: .85rem; font-weight: 700; }
.hero-image-wrap { height: 425px; box-shadow: var(--shadow); }
.hero-image { width: 100%; height: 100%; object-fit: cover; object-position: center; display: block; }
.section { padding: 96px 0; }
.concerns { background: #fbfcfc; text-align: center; }
.concerns h2 { margin-bottom: 34px; }
.concern-list { display: grid; gap: 11px; margin: 0 auto 32px; text-align: left; }
.concern-list p { position: relative; margin: 0; padding: 15px 18px 15px 44px; background: var(--white); border-left: 4px solid #9abec6; box-shadow: 0 4px 14px rgba(30, 67, 83, .06); }
.concern-list p::before { content: ""; position: absolute; top: 27px; left: 18px; width: 9px; height: 9px; border-radius: 50%; background: var(--blue); }
.closing-copy { margin: 0; }
.reasons { background: var(--pale); }
.reason-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.reason-card { overflow: hidden; background: var(--white); box-shadow: 0 5px 16px rgba(30, 67, 83, .07); transition: transform .2s, box-shadow .2s; }
.reason-card:hover { transform: translateY(-4px); box-shadow: 0 12px 24px rgba(30, 67, 83, .13); }
.reason-image-wrap { position: relative; height: 160px; overflow: hidden; background: #c7d6da; }
.reason-image { width: 100%; height: 100%; display: block; object-fit: cover; transition: transform .35s ease; }
.reason-card:hover .reason-image { transform: scale(1.05); }
.reason-content { min-height: 190px; padding: 26px 28px 28px; }
.reason-card p { margin-bottom: 0; font-size: .93rem; }
.number { position: absolute; left: 20px; bottom: 14px; color: var(--white); font-family: Georgia, serif; font-size: 2rem; font-weight: 700; line-height: 1; text-shadow: 0 2px 8px rgba(0, 0, 0, .45); }
.channel-cta { color: var(--white); background: var(--navy); }
.channel-cta h2, .channel-cta .section-label { color: var(--white); }
.channel-cta .section-label { color: #b9d8dd; }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 48px; }
.cta-inner p:not(.section-label) { max-width: 600px; margin-bottom: 0; }
.button-light { flex: 0 0 auto; color: var(--navy); background: var(--white); }
.faq { background: #fbfcfc; }
.faq-list { border-top: 1px solid var(--line); }
details { border-bottom: 1px solid var(--line); }
summary { position: relative; padding: 21px 34px 21px 0; color: var(--navy); font-weight: 800; cursor: pointer; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; position: absolute; top: 18px; right: 3px; color: var(--blue); font-size: 1.4rem; font-weight: 400; }
details[open] summary::after { content: "−"; }
details p { margin: 0 0 22px; color: #4d5c65; }
.site-footer { background: #112937; color: #dce8ec; }
.site-footer .brand { color: var(--white); }
.site-footer a { font-size: .85rem; }

@media (max-width: 760px) {
  .container, .narrow { width: min(100% - 32px, 1120px); }
  .header-inner, .footer-inner { min-height: 64px; }
  .header-link { font-size: .74rem; }
  .hero-grid { min-height: auto; grid-template-columns: 1fr; gap: 0; }
  .hero-copy { padding: 52px 0 28px; }
  .hero-image-wrap { height: 285px; margin: 0 -16px; }
  .section { padding: 68px 0; }
  .reason-grid { grid-template-columns: 1fr; gap: 14px; }
  .reason-content { min-height: auto; }
  .cta-inner { display: block; }
  .cta-inner .button { margin-top: 28px; }
  .footer-inner { align-items: flex-start; flex-direction: column; justify-content: center; gap: 5px; padding: 14px 0; }
}