:root{
  --ink:#171a33;
  --ink-soft:#4a4f6e;
  --navy:#0f1226;
  --indigo:#2a3366;
  --orange:#ff6b1a;
  --orange-deep:#d9520a;
  --paper:#f5f6fa;
  --card:#ffffff;
  --line:#dfe2ee;
  --tint:#fff3ea;
  --bar-h:56px;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --ink:#eceef8;--ink-soft:#a9aecb;--paper:#0c0e1d;--card:#161a33;--line:#272c4d;--tint:#2a2030;
  }
}
:root[data-theme="dark"]{--ink:#eceef8;--ink-soft:#a9aecb;--paper:#0c0e1d;--card:#161a33;--line:#272c4d;--tint:#2a2030}
:root[data-theme="light"]{--ink:#171a33;--ink-soft:#4a4f6e;--paper:#f5f6fa;--card:#fff;--line:#dfe2ee;--tint:#fff3ea}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:calc(var(--bar-h) + 8px)}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:"Hiragino Sans","Hiragino Kaku Gothic ProN","Noto Sans JP","Yu Gothic",Meiryo,sans-serif;
  font-size:16px;line-height:1.85;
  word-break:auto-phrase;text-wrap:pretty;overflow-wrap:anywhere;
  padding-bottom:calc(88px + env(safe-area-inset-bottom));
}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
h1,h2,h3{line-height:1.45;margin:0;text-wrap:balance}
p{margin:0}
.wrap{max-width:560px;margin:0 auto;padding:0 20px}

/* 上に固定:LINEへ戻る導線 */
.bar{
  position:fixed;inset:0 0 auto 0;z-index:20;height:var(--bar-h);
  background:var(--navy);color:#fff;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:0 14px 0 16px;padding-top:env(safe-area-inset-top);
}
.bar .brand{display:flex;align-items:center;gap:10px;font-size:13px;letter-spacing:.04em;font-weight:600;min-width:0}
.bar .brand img{width:28px;height:28px;border-radius:6px;flex:none}
.bar .brand span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;border-radius:999px;
  background:var(--orange);color:#fff;text-decoration:none;font-weight:700;font-size:15px;
  border:0;cursor:pointer;
}
.btn:focus-visible,a:focus-visible{outline:3px solid #ffb98f;outline-offset:2px}
.btn.small{min-height:38px;padding:0 16px;font-size:13px;white-space:nowrap}
.btn.ghost{background:transparent;color:var(--ink);border:2px solid var(--ink)}
.btn.block{display:flex;width:100%}
@media (hover:hover){.btn:hover{background:var(--orange-deep)}}

main{padding-top:var(--bar-h)}

.hero{position:relative;color:#fff;background:var(--navy)}
.hero picture,.hero img.bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,18,38,.35) 0%,rgba(15,18,38,.88) 100%)}
.hero .wrap{position:relative;z-index:1;padding-top:96px;padding-bottom:44px}
.eyebrow{font-size:13px;letter-spacing:.14em;color:#ffcfae;font-weight:700}
.hero h1{font-size:30px;margin-top:10px}
.hero p.lead{margin-top:16px;font-size:16px;color:#e9ebf7}

section{padding:48px 0}
section.alt{background:var(--card);border-block:1px solid var(--line)}
.sec-title{font-size:22px;margin-bottom:6px}
.sec-sub{color:var(--ink-soft);font-size:14px;margin-bottom:22px}
.mark{color:var(--orange);font-weight:700}

.note{font-size:13px;color:var(--ink-soft);line-height:1.7}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 18px 20px}

.cta-end{background:var(--navy);color:#fff;text-align:center}
.cta-end h2{font-size:21px}
.cta-end p{margin:12px 0 22px;color:#d6d9ee;font-size:15px}
.cta-end .row{display:grid;gap:12px}
.cta-end .btn.ghost{color:#fff;border-color:#8890c4}

footer{padding:28px 0 8px;font-size:12px;color:var(--ink-soft);text-align:center;line-height:1.9}
footer a{text-decoration:underline}

/* 下に固定:LINE */
.dock{
  position:fixed;inset:auto 0 0 0;z-index:20;
  background:rgba(15,18,38,.96);backdrop-filter:blur(8px);
  padding:10px 16px calc(10px + env(safe-area-inset-bottom));
}
.dock .btn{width:100%;max-width:560px;margin:0 auto;display:flex}

@media (prefers-reduced-motion:no-preference){
  .rise{animation:rise .5s ease both}
  @keyframes rise{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
}