:root{
    --navy:#06152e;
    --blue:#0d3d6f;
    --blue2:#0b5272;
    --red:#d50a2c;
    --gold:#b99a57;
    --ice:#eef3f6;
    --line:#d8e0e6;
    --ink:#172033;
    --muted:#687181;
    --white:#fff;
    --max:1240px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
    margin:0;
    color:var(--ink);
    background:#fff;
    font-family:-apple-system,BlinkMacSystemFont,"Helvetica Neue","Yu Gothic","Hiragino Kaku Gothic ProN",Meiryo,sans-serif;
    line-height:1.8;
    overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}

.container{width:min(calc(100% - 48px),var(--max));margin-inline:auto}
.container.narrow{width:min(calc(100% - 48px),1040px)}
.section{padding:120px 0}
.eyebrow{
    margin:0 0 20px;
    color:var(--gold);
    font-size:12px;
    font-weight:800;
    letter-spacing:.22em;
}
.reveal{opacity:0;transform:translateY(28px);transition:opacity .8s ease,transform .8s ease}
.reveal.is-visible{opacity:1;transform:none}

.site-header{
    position:sticky;
    top:0;
    z-index:1000;
    background:rgba(255,255,255,.94);
    border-bottom:1px solid rgba(6,21,46,.08);
    backdrop-filter:blur(16px);
}
.header-inner{
    width:min(calc(100% - 48px),1380px);
    min-height:88px;
    margin:auto;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:32px;
}
.brand img{width:180px}
.global-nav{display:flex;align-items:center;gap:34px;font-size:13px;font-weight:700}
.global-nav a{position:relative}
.global-nav a:not(.nav-cta)::after{
    content:"";position:absolute;left:0;bottom:-8px;width:0;height:2px;background:var(--red);transition:.25s
}
.global-nav a:hover::after{width:100%}
.nav-cta{
    padding:14px 24px;
    background:var(--navy);
    color:#fff;
    border-radius:999px;
}
.menu-button{display:none;border:0;background:none;padding:10px}
.menu-button span{display:block;width:28px;height:2px;margin:6px;background:var(--navy)}

.hero{
    position:relative;
    padding:110px 0 120px;
    overflow:hidden;
    background:
        radial-gradient(circle at 85% 20%,rgba(13,82,114,.12),transparent 28%),
        linear-gradient(135deg,#fff 0%,#f5f8fa 64%,#e8eff3 100%);
}
.hero::after{
    content:"";
    position:absolute;
    width:540px;height:540px;
    right:-230px;bottom:-270px;
    border:1px solid rgba(13,61,111,.15);
    border-radius:50%;
}
.hero-grid{
    width:min(calc(100% - 48px),1380px);
    margin:auto;
    display:grid;
    grid-template-columns:minmax(0,.9fr) minmax(560px,1.1fr);
    align-items:center;
    gap:70px;
}
.breadcrumb{display:flex;gap:10px;flex-wrap:wrap;margin:0 0 44px;font-size:11px;letter-spacing:.16em;color:var(--muted)}
.breadcrumb a:hover{color:var(--red)}
.hero h1{margin:0 0 30px;color:var(--navy);line-height:1.08}
.hero h1 span{display:block;font-family:Georgia,"Times New Roman",serif;font-size:clamp(54px,6.2vw,92px);font-weight:500}
.hero h1 small{display:block;margin-top:22px;font-size:clamp(18px,2vw,28px);font-weight:700;letter-spacing:.04em}
.hero-lead{margin:0 0 24px;font-family:"Yu Mincho","Hiragino Mincho ProN",serif;font-size:clamp(26px,3vw,42px);font-weight:600;line-height:1.55;color:var(--blue)}
.hero-text{max-width:640px;margin:0;color:var(--muted)}
.hero-meta{display:flex;gap:10px;flex-wrap:wrap;margin-top:32px}
.hero-meta span{padding:8px 13px;border:1px solid rgba(6,21,46,.18);border-radius:999px;font-size:10px;font-weight:800;letter-spacing:.12em}

.hero-visual{position:relative;min-height:620px}
.device{position:absolute;background:#fff;border:1px solid rgba(6,21,46,.12);box-shadow:0 28px 70px rgba(6,21,46,.18);overflow:hidden}
.device.desktop{width:86%;right:0;top:26px;border-radius:18px}
.device.desktop img{width:100%}
.device.mobile{width:27%;left:0;bottom:0;border-radius:24px;border:8px solid #fff}
.device.mobile img{width:100%}

.section-head{
    display:grid;
    grid-template-columns:1fr .75fr;
    gap:80px;
    align-items:end;
    margin-bottom:70px;
}
.section-head h2,.large-title,.result h2,.cta h2{
    margin:0;
    color:var(--navy);
    font-family:"Yu Mincho","Hiragino Mincho ProN",serif;
    font-size:clamp(38px,5vw,66px);
    font-weight:500;
    line-height:1.35;
    letter-spacing:.03em;
}
.section-head>p{margin:0;color:var(--muted)}

.project-overview{background:#fff}
.overview-grid{
    display:grid;
    grid-template-columns:1.2fr .8fr;
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
}
.overview-grid dl{margin:0;padding:22px 0}
.overview-grid dl div{
    display:grid;
    grid-template-columns:150px 1fr;
    gap:20px;
    padding:18px 24px;
    border-bottom:1px solid var(--line);
}
.overview-grid dl div:last-child{border-bottom:0}
.overview-grid dt{font-size:11px;font-weight:800;letter-spacing:.16em;color:var(--gold)}
.overview-grid dd{margin:0;font-weight:700}
.overview-message{
    padding:52px;
    background:var(--navy);
    color:#fff;
    display:flex;
    flex-direction:column;
    justify-content:center;
}
.overview-message strong{font-size:11px;letter-spacing:.18em;color:#c8d6df}
.overview-message p{margin:18px 0 0;font-family:"Yu Mincho","Hiragino Mincho ProN",serif;font-size:28px;line-height:1.7}

.challenge{background:var(--ice)}
.challenge .large-title{margin-bottom:70px}
.challenge-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.challenge-card{padding:42px;background:#fff;border-top:4px solid var(--red);box-shadow:0 16px 40px rgba(6,21,46,.06)}
.challenge-card>span{font-family:Georgia,serif;font-size:54px;color:#dce3e8}
.challenge-card h3{margin:12px 0 16px;color:var(--navy);font-size:22px}
.challenge-card p{margin:0;color:var(--muted)}

.solution{background:var(--navy);color:#fff}
.solution .section-head h2{color:#fff}
.solution .section-head>p{color:#bdc8d4}
.feature-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:rgba(255,255,255,.16)}
.feature-card{padding:54px;background:var(--navy)}
.feature-card>span{display:inline-grid;place-items:center;width:44px;height:44px;border:1px solid rgba(255,255,255,.32);border-radius:50%;font-size:12px;color:#d4b978}
.feature-card h3{margin:24px 0 14px;font-size:27px}
.feature-card p{margin:0;color:#bdc8d4}

.showcase{background:#fff}
.showcase-item{
    display:grid;
    grid-template-columns:.42fr .58fr;
    gap:60px;
    align-items:center;
    padding:70px 0;
    border-top:1px solid var(--line);
}
.showcase-item.reverse{grid-template-columns:.58fr .42fr}
.showcase-item.reverse .showcase-copy{order:2}
.showcase-item.reverse .showcase-image{order:1}
.showcase-copy>span{font-size:11px;font-weight:800;letter-spacing:.18em;color:var(--gold)}
.showcase-copy h3{margin:16px 0 20px;font-size:34px;color:var(--navy)}
.showcase-copy p{margin:0;color:var(--muted)}
.showcase-image{
    background:#f1f4f6;
    border:1px solid var(--line);
    padding:20px;
    box-shadow:0 20px 50px rgba(6,21,46,.08);
}
.showcase-image img{width:100%}
.showcase-image.split{display:grid;grid-template-columns:1fr 1fr;gap:14px}

.mobile-experience{background:#f7f8fa}
.phone-gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;align-items:start}
.phone-gallery figure{margin:0}
.phone-gallery img{width:100%;border-radius:28px;box-shadow:0 22px 55px rgba(6,21,46,.14)}
.phone-gallery figcaption{text-align:center;margin-top:16px;font-size:13px;font-weight:700;color:var(--muted)}

.functions{background:#fff}
.function-list{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}
.function-list span{display:flex;gap:18px;align-items:center;padding:24px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);font-weight:700}
.function-list small{color:var(--gold);font-size:10px;letter-spacing:.12em}

.result{background:linear-gradient(135deg,#f3f6f8,#e6edf1)}
.result-grid{display:grid;grid-template-columns:1fr .8fr;gap:70px;align-items:center}
.result-copy>p:last-child{color:var(--muted)}
.client-voice{margin:0;padding:50px;background:#fff;border-left:6px solid var(--red);box-shadow:0 20px 50px rgba(6,21,46,.08)}
.client-voice span{font-size:11px;font-weight:800;letter-spacing:.18em;color:var(--gold)}
.client-voice p{margin:20px 0 0;font-family:"Yu Mincho","Hiragino Mincho ProN",serif;font-size:28px;line-height:1.7;color:var(--navy)}

.cta{background:var(--navy);color:#fff;text-align:center}
.cta h2{color:#fff}
.cta p:not(.eyebrow){color:#bdc8d4}
.cta-button{display:inline-flex;align-items:center;gap:34px;margin-top:28px;padding:20px 34px;background:var(--red);font-weight:800}
.cta-button span{font-size:22px}

.site-footer{background:#031022;color:#fff;padding:60px 0}
.footer-inner{display:grid;grid-template-columns:1fr auto;gap:30px;align-items:center}
.footer-brand img{width:170px;filter:brightness(0) invert(1)}
.footer-links{display:flex;gap:24px;font-size:12px}
.footer-inner>p{grid-column:1/-1;margin:0;color:#8793a2;font-size:11px}
.page-top{
    position:fixed;right:24px;bottom:24px;z-index:100;
    width:50px;height:50px;border-radius:50%;display:grid;place-items:center;
    background:var(--blue2);color:#fff;box-shadow:0 12px 30px rgba(6,21,46,.24)
}

@media (max-width:1100px){
    .hero-grid{grid-template-columns:1fr;gap:60px}
    .hero-visual{min-height:580px}
    .section-head{grid-template-columns:1fr;gap:24px}
    .phone-gallery{grid-template-columns:repeat(2,1fr)}
}

@media (max-width:820px){
    .section{padding:84px 0}
    .header-inner{min-height:74px}
    .brand img{width:150px}
    .menu-button{display:block}
    .global-nav{
        position:absolute;left:0;right:0;top:74px;
        display:none;flex-direction:column;align-items:stretch;gap:0;
        padding:14px 24px 24px;background:#fff;border-bottom:1px solid var(--line)
    }
    .global-nav.is-open{display:flex}
    .global-nav a{padding:14px 0}
    .nav-cta{text-align:center;margin-top:10px}
    .hero{padding:72px 0 90px}
    .hero-grid{width:min(calc(100% - 32px),1380px)}
    .hero h1 span{font-size:clamp(44px,14vw,68px)}
    .hero-visual{min-height:490px}
    .device.desktop{width:94%;top:0}
    .device.mobile{width:31%;left:0}
    .overview-grid,.result-grid{grid-template-columns:1fr}
    .challenge-grid,.feature-grid{grid-template-columns:1fr}
    .showcase-item,.showcase-item.reverse{grid-template-columns:1fr;gap:30px}
    .showcase-item.reverse .showcase-copy,.showcase-item.reverse .showcase-image{order:initial}
    .function-list{grid-template-columns:repeat(2,1fr)}
    .footer-inner{grid-template-columns:1fr}
    .footer-links{flex-wrap:wrap}
    .footer-inner>p{grid-column:auto}
}

@media (max-width:560px){
    .container,.container.narrow{width:min(calc(100% - 30px),var(--max))}
    .header-inner{width:min(calc(100% - 30px),1380px)}
    .hero-grid{width:min(calc(100% - 30px),1380px)}
    .hero-visual{min-height:350px}
    .device.mobile{width:34%;border-width:5px;border-radius:16px}
    .overview-grid dl div{grid-template-columns:1fr;gap:4px;padding-inline:0}
    .overview-message{padding:34px}
    .overview-message p{font-size:23px}
    .challenge-card,.feature-card{padding:34px 28px}
    .showcase-image{padding:10px}
    .showcase-image.split{grid-template-columns:1fr}
    .phone-gallery{grid-template-columns:repeat(2,1fr);gap:14px}
    .phone-gallery img{border-radius:18px}
    .function-list{grid-template-columns:1fr}
    .client-voice{padding:34px 28px}
    .client-voice p{font-size:22px}
    .cta-button{width:100%;justify-content:center}
}


/* Version 2：日本語見出しの不自然な途中改行を防止 */
.controlled-title{
    line-height:1.45;
    letter-spacing:.03em;
    word-break:keep-all;
    overflow-wrap:normal;
}

.controlled-title span{
    display:block;
    width:max-content;
    max-width:100%;
}

@media (max-width:560px){
    .controlled-title{
        font-size:clamp(34px,10.5vw,48px);
        line-height:1.48;
        letter-spacing:.01em;
    }

    .controlled-title span{
        width:auto;
    }
}