:root{
  --bg:#f4f6f8;
  --surface:#ffffff;
  --text:#17202a;
  --muted:#68737d;
  --line:#e4e8ec;
  --primary:#111827;
  --primary-soft:#eef1f4;
  --danger:#a21f2d;
  --success:#1f7a4d;
  --shadow:0 12px 30px rgba(17,24,39,.07);
  --radius:18px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP","Hiragino Kaku Gothic ProN",Meiryo,sans-serif;line-height:1.65}
a{color:inherit;text-decoration:none}
.topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;padding:12px max(16px,calc((100vw - 1120px)/2));background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px}
.brand-mark,.login-logo{display:grid;place-items:center;background:var(--primary);color:#fff;font-weight:800;letter-spacing:.06em}
.brand-mark{width:38px;height:38px;border-radius:10px}
.brand strong{display:block;font-size:14px;line-height:1.2}
.brand small{display:block;color:var(--muted);font-size:11px}
.userbox{display:flex;gap:14px;align-items:center;font-size:13px}
.userbox a{color:var(--muted)}
.container{max-width:1120px;margin:0 auto;padding:28px 16px 72px}
.hero{background:linear-gradient(135deg,#111827,#293447);color:#fff;border-radius:24px;padding:34px;margin-bottom:22px;box-shadow:var(--shadow)}
.hero h1,.page-title h1{margin:.15em 0 .35em;font-size:clamp(26px,5vw,44px);line-height:1.18}
.hero p{margin:0;max-width:760px;color:#d7dde5}
.eyebrow{font-size:12px;letter-spacing:.16em;font-weight:800;color:var(--muted);margin:0}
.hero .eyebrow{color:#aeb8c5}
.search-box,.panel,.login-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.search-box{padding:20px;margin-bottom:28px}
.search-box label{display:block;font-weight:700;margin-bottom:8px}
.search-row{display:flex;gap:8px}
input{width:100%;border:1px solid #cfd6dd;border-radius:12px;padding:13px 14px;font:inherit;background:#fff}
input:focus{outline:2px solid #aab4bf;outline-offset:1px}
.button{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:12px;padding:12px 18px;font-weight:700;background:#e9edf1;cursor:pointer}
.button.primary{background:var(--primary);color:#fff}
.button.full{width:100%}
.button.disabled{pointer-events:none;opacity:.45}
.section-head{display:flex;justify-content:space-between;align-items:center;margin:26px 2px 12px}
.section-head h2{margin:0;font-size:20px}
.quick-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:12px}
.quick-card,.category-card{background:var(--surface);border:1px solid var(--line);border-radius:16px;box-shadow:0 6px 20px rgba(17,24,39,.04);transition:.18s ease}
.quick-card{padding:18px 14px;display:flex;flex-direction:column;gap:4px;min-height:120px}
.quick-card:hover,.category-card:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.quick-card span{font-size:26px}
.quick-card strong{font-size:14px}
.quick-card small,.category-card small{color:var(--muted)}
.category-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.category-card{display:flex;align-items:center;gap:14px;padding:20px}
.category-card.static{cursor:default}
.category-card.static:hover{transform:none}
.icon{width:46px;height:46px;border-radius:14px;background:var(--primary-soft);display:grid;place-items:center;font-weight:800;font-size:20px;flex:0 0 auto}
.category-card strong{display:block;font-size:16px}
.category-card small{display:block;margin-top:2px;font-size:12px}
.updates{margin-top:28px}
.timeline{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:8px 18px}
.timeline>div{display:grid;grid-template-columns:110px 1fr;gap:12px;padding:12px 0;border-bottom:1px solid var(--line)}
.timeline>div:last-child{border-bottom:0}
.timeline time{font-size:13px;color:var(--muted)}
.timeline p{margin:0}
.page-title{padding:12px 2px 24px}
.page-title p:last-child{max-width:760px;color:var(--muted)}
.stack{display:grid;gap:16px}
.panel{padding:22px}
.panel h2{margin-top:0}
.link-list{display:grid;border-top:1px solid var(--line);margin-top:12px}
.link-list a{display:flex;justify-content:space-between;gap:14px;padding:13px 4px;border-bottom:1px solid var(--line)}
.link-list span{color:var(--muted);font-size:12px}
.store-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.trouble-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.trouble-grid a{background:#fff;border:1px solid #ead6d9;border-left:4px solid var(--danger);padding:18px;border-radius:14px;font-weight:700}
.danger-title h1{color:var(--danger)}
.notice{padding:13px 15px;border-radius:12px;background:#f0f3f6;margin:12px 0}
.notice.error{background:#fdecef;color:#7e1723}
.notice.success{background:#e8f6ee;color:#145b39}
.muted{color:var(--muted)}
.small{font-size:12px}
.login-card{max-width:430px;margin:9vh auto;padding:28px}
.login-logo{width:58px;height:58px;border-radius:16px;margin-bottom:18px}
.login-card h1{margin:0}
.form{display:grid;gap:14px;margin-top:18px}
.form label{font-size:13px;font-weight:700}
.form input{margin-top:6px}
.narrow{max-width:520px;margin:7vh auto}
.repair-template{background:#f8fafb;border:1px solid var(--line);border-radius:14px;padding:18px}
.clean-list{padding-left:20px}
.footer{text-align:center;color:var(--muted);font-size:12px;padding:0 16px 28px}
@media(max-width:900px){
  .quick-grid{grid-template-columns:repeat(3,1fr)}
  .trouble-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:640px){
  .container{padding-top:18px}
  .hero{padding:24px 20px;border-radius:18px}
  .search-row{flex-direction:column}
  .quick-grid{grid-template-columns:repeat(2,1fr)}
  .category-grid,.store-grid,.trouble-grid{grid-template-columns:1fr}
  .timeline>div{grid-template-columns:1fr;gap:2px}
  .userbox span{display:none}
}

.article h2{margin-top:1.5em}
.manual-group{margin-bottom:16px}
.manual-page-list{display:grid;grid-template-columns:1fr;gap:20px;margin-top:20px}
.manual-page{margin:0;background:#f8fafb;border:1px solid var(--line);border-radius:14px;padding:10px}
.manual-page img{display:block;width:100%;height:auto;max-width:920px;margin:0 auto;border-radius:8px;background:#fff}
.manual-page figcaption{text-align:center;color:var(--muted);font-size:12px;margin-top:8px}

/* v3 Web記事型マニュアル */
.web-manual{line-height:1.75}
.web-manual h2{margin:30px 0 12px;border-left:4px solid var(--primary);padding-left:10px}
.web-manual h3{margin:0 0 6px}
.procedure{display:grid;gap:18px}
.step{display:grid;grid-template-columns:42px minmax(0,1fr);gap:12px;align-items:start;padding:16px;border:1px solid var(--line);border-radius:14px;background:#fff}
.step>span{display:grid;place-items:center;width:36px;height:36px;border-radius:50%;background:var(--primary);color:#fff;font-weight:700}
.step-image{margin:14px 0 4px}
.step-image img{display:block;width:100%;height:auto;max-width:760px;border:1px solid var(--line);border-radius:10px;background:#fff}
.step-image figcaption{font-size:12px;color:var(--muted);margin-top:5px}
.callout{padding:14px 16px;border-radius:12px;background:#f3f7ff;margin:14px 0}
.callout.warning{background:#fff7e6}
.check-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:12px 0}
.check-grid>div{padding:12px;border:1px solid var(--line);border-radius:10px;background:#fff}
.source-details{margin-top:34px;padding:12px 14px;border-top:1px solid var(--line);color:var(--muted)}
.source-details summary{cursor:pointer;font-weight:700;color:inherit}
.source-details a{display:inline-block;margin:8px 6px 0 0;padding:4px 9px;border:1px solid var(--line);border-radius:8px}
.model-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.model-card{padding:16px;border:1px solid var(--line);border-radius:14px;background:#fff}
.model-card h2{margin-top:0}
@media(max-width:700px){.check-grid,.model-grid{grid-template-columns:1fr}.step{grid-template-columns:36px minmax(0,1fr);padding:12px}.step>span{width:32px;height:32px}}