/* AI研修サイト 共通（紹介・事例・演習シート） */
:root{
  --navy:#10243e; --ink:#1c2b3a; --sub:#55657a; --line:#d7dfea; --bg:#f6f8fb; --card:#fff;
  --blue:#1d5fd1; --teal:#0b8580; --amber:#c96a00; --red:#c93c3c; --green:#23875a;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Hiragino Sans","Hiragino Kaku Gothic ProN","Yu Gothic UI","Meiryo",sans-serif;font-size:16px;line-height:1.8;-webkit-font-smoothing:antialiased;-webkit-text-size-adjust:100%}
a{color:var(--blue)}
img{max-width:100%}
.wrap{max-width:980px;margin:0 auto;padding:0 20px}
.top{background:var(--navy);color:#fff}
.top .wrap{display:flex;justify-content:space-between;align-items:center;gap:12px;min-height:56px;flex-wrap:wrap;padding-top:8px;padding-bottom:8px}
.top a{color:#fff;text-decoration:none}
.top .brand{font-weight:700;letter-spacing:.03em}
.top nav{display:flex;gap:18px;font-size:14px}
.top nav a{opacity:.9}
.hero{background:linear-gradient(135deg,#10243e 0%,#173a66 60%,#1d5fd1 130%);color:#fff;padding:56px 0 52px}
.hero .tag{display:inline-block;background:#ffd98a;color:#10243e;border-radius:999px;font-size:13px;font-weight:700;padding:4px 14px;letter-spacing:.05em}
.hero h1{font-size:clamp(28px,5vw,44px);line-height:1.3;margin:16px 0 12px}
.hero p{font-size:clamp(16px,2.2vw,19px);color:#d6e4ff;margin:0;max-width:44em}
.hero .facts{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;padding:0;list-style:none}
.hero .facts li{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.3);border-radius:10px;padding:6px 14px;font-size:14px}
main section{padding:44px 0 8px}
h2{font-size:clamp(22px,3.2vw,28px);line-height:1.4;color:var(--navy);margin:0 0 18px;padding-left:14px;border-left:7px solid var(--blue)}
h3{font-size:18px;line-height:1.5;color:var(--navy);margin:0 0 6px}
p{margin:.5em 0}
.lead{font-size:17px}
.sub{color:var(--sub)}
.small{font-size:14px}
.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px 22px;box-shadow:0 2px 8px rgba(16,36,62,.05)}
.card.b{border-top:6px solid var(--blue)}.card.t{border-top:6px solid var(--teal)}.card.a{border-top:6px solid var(--amber)}.card.n{border-top:6px solid var(--navy)}
.card ul{margin:.3em 0;padding-left:1.2em}
.card li{margin:.2em 0}
.step{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.08em;color:#fff;background:var(--navy);border-radius:999px;padding:2px 12px;margin-bottom:8px}
.card.b .step{background:var(--blue)}.card.t .step{background:var(--teal)}.card.a .step{background:var(--amber)}
table{width:100%;border-collapse:collapse;background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 2px 8px rgba(16,36,62,.05);font-size:15px}
th{background:var(--navy);color:#fff;text-align:left;padding:10px 14px;font-weight:700}
td{padding:10px 14px;border-top:1px solid var(--line);vertical-align:top}
.tscroll{overflow-x:auto}
.note{background:#fff7e6;border-left:6px solid var(--amber);border-radius:8px;padding:12px 16px;font-size:14.5px;margin:16px 0}
.warn{background:#fdecec;border-left:6px solid var(--red);border-radius:8px;padding:12px 16px;font-size:14.5px;margin:16px 0;color:#7a1f1f}
.case{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px 24px;margin:0 0 18px;box-shadow:0 2px 8px rgba(16,36,62,.05)}
.case .meta{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:8px}
.pill{display:inline-block;font-size:12px;font-weight:700;border-radius:999px;padding:2px 12px;background:#e6eefc;color:var(--blue)}
.pill.t{background:#e1f3f1;color:var(--teal)}.pill.g{background:#eceff3;color:var(--sub)}.pill.a{background:#fbeedd;color:var(--amber)}
.case dl{display:grid;grid-template-columns:7.5em 1fr;gap:6px 14px;margin:10px 0 0}
.case dt{font-weight:700;color:var(--navy)}
.case dd{margin:0}
@media(max-width:560px){.case dl{grid-template-columns:1fr}.case dt{margin-top:6px}}
.cta{background:var(--navy);color:#fff;border-radius:16px;padding:28px 26px;margin:44px 0}
.cta h2{color:#fff;border-left-color:#ffd98a}
.cta a{color:#ffd98a}
.cta .tel{font-size:26px;font-weight:700;letter-spacing:.03em}
footer{border-top:1px solid var(--line);margin-top:40px;padding:22px 0 40px;font-size:13px;color:var(--sub)}

/* 演習シート */
.wnav{position:sticky;top:0;z-index:10;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 2px 8px rgba(16,36,62,.06)}
.wnav .wrap{display:flex;gap:6px;overflow-x:auto;padding-top:8px;padding-bottom:8px;white-space:nowrap}
.wnav a{font-size:14px;text-decoration:none;color:var(--navy);background:var(--bg);border:1px solid var(--line);border-radius:999px;padding:4px 14px;flex:none}
.wnav a.g-a{border-color:var(--blue);color:var(--blue)}.wnav a.g-b{border-color:var(--teal);color:var(--teal)}.wnav a.g-c{border-color:var(--amber);color:var(--amber)}
.ex{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px 22px;margin:0 0 20px;box-shadow:0 2px 8px rgba(16,36,62,.05)}
.ex>h3{font-size:19px;display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.ex .id{display:inline-block;background:var(--navy);color:#fff;border-radius:8px;padding:0 12px;font-size:15px;line-height:28px}
.ex.ga .id{background:var(--blue)}.ex.gb .id{background:var(--teal)}.ex.gc .id{background:var(--amber)}
.pbox{position:relative;margin:12px 0 6px}
pre.prompt{margin:0;background:#0f1c2e;color:#e8eef7;border-radius:12px;padding:44px 18px 16px;font-family:inherit;font-size:14.5px;line-height:1.75;white-space:pre-wrap;word-break:break-word;overflow-wrap:anywhere}
.copy{position:absolute;right:10px;top:8px;font:inherit;font-size:13px;font-weight:700;background:#ffd98a;color:#10243e;border:0;border-radius:8px;padding:5px 14px;cursor:pointer}
.copy.done{background:#9fe3b9}
.look{font-size:14.5px;background:var(--bg);border-radius:10px;padding:10px 14px;margin-top:10px}
.look b{color:var(--navy)}
.ais{display:flex;flex-wrap:wrap;gap:10px;margin:14px 0 0;padding:0;list-style:none}
.ais a{display:inline-block;background:#fff;border:2px solid var(--blue);color:var(--blue);font-weight:700;text-decoration:none;border-radius:10px;padding:6px 18px}
details{background:#fff;border:1px dashed var(--line);border-radius:12px;padding:10px 16px;margin:0 0 20px}
summary{cursor:pointer;font-weight:700;color:var(--sub)}
.checks{list-style:none;padding:0;margin:0}
.checks li{padding:6px 0 6px 2px;border-bottom:1px dashed var(--line)}
.checks label{display:flex;gap:10px;align-items:flex-start;cursor:pointer}
.checks input{margin-top:.45em;width:18px;height:18px;flex:none}
.phr{display:grid;gap:8px;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));list-style:none;padding:0;margin:0}
.phr li{background:#fff;border:1px solid var(--line);border-radius:10px;padding:8px 14px}
@media print{
  .top nav,.wnav,.copy,.ais{display:none!important}
  body{background:#fff;font-size:11pt}
  pre.prompt{background:#fff;color:#000;border:1px solid #999;padding:10px 12px}
  .ex,.case,.card{break-inside:avoid;box-shadow:none}
  details{display:none}
}

/* 紹介・事例ページの補助 */
.hero.s{padding:40px 0 36px}
.hero.s h1{font-size:clamp(26px,4.4vw,36px)}
.btn{display:inline-block;background:#ffd98a;color:#10243e!important;font-weight:700;text-decoration:none;border-radius:10px;padding:10px 22px;margin-top:22px}
.btn.line{background:transparent;color:#fff!important;border:2px solid rgba(255,255,255,.6);margin-left:8px}
.kv{display:grid;grid-template-columns:8em 1fr;gap:4px 14px;margin:0}
.kv dt{font-weight:700;color:var(--navy)}
.kv dd{margin:0}
@media(max-width:560px){.kv{grid-template-columns:1fr}.kv dt{margin-top:8px}.btn.line{margin-left:0}}
.case h3{font-size:20px}
.case ul{margin:.2em 0;padding-left:1.2em}
@media(max-width:640px){
  .top .brand{font-size:14px}
  table.stack,table.stack tbody,table.stack tr,table.stack td{display:block;width:auto!important}
  table.stack tr:first-child{display:none}
  table.stack tr{border-top:1px solid var(--line);padding:10px 14px}
  table.stack tr:nth-child(2){border-top:0}
  table.stack td{border:0;padding:1px 0}
  table.stack td:empty{display:none}
  table.stack.tt td:nth-child(1),table.stack.tt td:nth-child(2){display:inline-block;margin-right:.8em}
  table.stack.tt td:nth-child(1){font-weight:700;color:var(--blue)}
}
.cta .tel a{white-space:nowrap}
@media(max-width:640px){
  .cta .tel{font-size:22px}
  table.stack.g td:nth-child(3){color:var(--sub);font-size:14px}
  table.stack.g td:nth-child(3)::before{content:"注意点：";font-weight:700}
}
table.try{width:auto;font-size:14px;margin-top:10px}
table.try th,table.try td{padding:5px 16px;white-space:nowrap}
@media (max-width:480px){table.try th,table.try td{padding:5px 10px}}
table.try td:last-child{text-align:right}