:root{
  --brand:#619bd5; --brand-dark:#3f78b0; --brand-soft:#edf5fc;
  --bg:#f5f7fa; --panel:#fff; --line:#dfe6ee;
  --text:#24313d; --muted:#697786;
  --warning:#fff7df; --warning-line:#e5b84b;
  --danger:#d34f4f; --shadow:0 8px 24px rgba(31,60,86,.07);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Yu Gothic","Meiryo",sans-serif;
  color:var(--text);background:var(--bg);line-height:1.7;
}
a{color:inherit}
.topbar{
  height:64px;position:sticky;top:0;z-index:100;
  display:flex;align-items:center;padding:0 20px;
  background:var(--brand);color:#fff;box-shadow:0 2px 8px rgba(0,0,0,.14);
}
.logo{display:flex;align-items:center;gap:12px;font-size:18px;font-weight:700;text-decoration:none}
.logo-mark{width:34px;height:34px;border-radius:8px;background:rgba(255,255,255,.16);display:grid;place-items:center}
.topbar .meta{margin-left:auto;font-size:13px;opacity:.95}
.layout{display:grid;grid-template-columns:285px minmax(0,1fr);min-height:calc(100vh - 64px)}
.sidebar{
  background:#fff;border-right:1px solid var(--line);
  position:sticky;top:64px;height:calc(100vh - 64px);overflow:auto;padding:18px 14px 30px;
}
.side-caption{font-size:11px;letter-spacing:.1em;color:#8793a0;font-weight:700;padding:2px 10px 12px}
.side-group{margin-bottom:17px}
.side-group-title{font-size:13px;font-weight:700;color:#495764;padding:8px 11px}
.side-link{
  display:flex;gap:10px;align-items:flex-start;
  padding:10px 12px;border-radius:8px;color:#465461;
  font-size:14px;line-height:1.4;text-decoration:none;
}
.side-link:hover{background:#f3f7fa}
.side-link.active{background:var(--brand-soft);color:var(--brand-dark);font-weight:700}
.side-icon{width:20px;text-align:center;flex:none}
.main{width:100%;max-width:1480px;margin:0 auto;padding:28px clamp(18px,4vw,52px) 70px}
.breadcrumb{font-size:12px;color:var(--muted);margin-bottom:16px}
.hero{
  background:linear-gradient(135deg,#fff,#f0f7fd);
  border:1px solid var(--line);border-radius:16px;padding:30px;box-shadow:var(--shadow);
}
.hero h1{margin:0 0 8px;font-size:30px}.hero p{margin:0;color:var(--muted)}
.search-row{display:flex;gap:10px;max-width:760px;margin-top:22px}
.search-row input{flex:1;padding:13px 14px;border:1px solid #cdd8e2;border-radius:10px;background:#fff}
.primary,.secondary{font:inherit;cursor:pointer;border-radius:9px;font-weight:700}
.primary{border:0;background:var(--brand);color:#fff;padding:0 20px}
.secondary{display:inline-block;border:1px solid #cbd7e2;background:#fff;color:#445461;padding:9px 14px;text-decoration:none}
.section-title{margin:32px 0 14px;font-size:20px}
.manual-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.manual-card{
  border:1px solid var(--line);background:#fff;border-radius:14px;padding:20px;
  box-shadow:0 3px 14px rgba(31,60,86,.04);text-decoration:none;transition:.15s;
}
.manual-card:hover{transform:translateY(-2px);border-color:#bfd3e6;box-shadow:var(--shadow)}
.card-top{display:flex;gap:13px;align-items:flex-start}
.card-icon{width:42px;height:42px;border-radius:10px;background:var(--brand-soft);display:grid;place-items:center;font-size:20px;flex:none}
.manual-card h3{margin:2px 0 7px;font-size:17px}.manual-card p{margin:0;color:var(--muted);font-size:13px;line-height:1.65}
.tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:13px}
.tag{font-size:11px;background:#f2f5f8;color:#596875;padding:4px 8px;border-radius:999px}
.manual{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:var(--shadow)}
.manual-head{display:flex;align-items:center;gap:12px;padding:23px 26px;border-bottom:1px solid var(--line)}
.manual-head h1{margin:0;font-size:23px;line-height:1.45}
.badge{font-size:11px;padding:4px 9px;border-radius:999px;background:#eef5fb;color:var(--brand-dark);font-weight:700;white-space:nowrap}
.badge.error{background:#fff0f0;color:#c94b4b}
.manual-body{padding:26px}
.info-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:18px}
.info-box{padding:14px 16px;border:1px solid #e2eaf1;border-radius:10px;background:#f8fbfd}
.info-box b{display:block;color:var(--brand-dark);font-size:12px;margin-bottom:3px}
.notice{padding:13px 15px;border-left:4px solid var(--warning-line);background:var(--warning);border-radius:8px;margin:16px 0}
.manual h2.section{margin:28px 0 12px;font-size:18px}
.video-wrap{background:#111;border-radius:12px;overflow:hidden}
.video-wrap video{display:block;width:100%;max-height:680px;background:#000}
.video-help{font-size:12px;color:var(--muted);margin-top:8px}
.steps{display:grid;gap:18px}
.step{display:grid;grid-template-columns:50px minmax(0,1fr);gap:14px;padding:19px;border:1px solid var(--line);border-radius:12px}
.step-num{width:40px;height:40px;border-radius:50%;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:700}
.step h3{margin:4px 0 8px;font-size:17px}.step p{margin:0;color:#52606d}
.shot{margin:15px 0 0}.shot img{display:block;width:100%;border:1px solid #cfd9e2;border-radius:9px;background:#fff}
.caption{text-align:center;font-size:11px;color:#778593;margin-top:6px}
.point{margin-top:12px;background:var(--warning);border-left:4px solid var(--warning-line);border-radius:7px;padding:11px 13px;font-size:13px}
.actions{display:flex;justify-content:space-between;gap:10px;margin:0 0 18px}
.updated{font-size:11px;color:#85919c;text-align:right;margin-top:22px}
.empty{display:none;padding:28px;background:#fff;border:1px dashed #cbd7e2;border-radius:12px;color:var(--muted);text-align:center}
@media(max-width:980px){
  .layout{grid-template-columns:1fr}.sidebar{display:none}
}
@media(max-width:720px){
  .main{padding:20px 14px 50px}.hero{padding:22px}.hero h1{font-size:25px}
  .search-row{display:grid}.primary{padding:11px 18px}
  .manual-cards,.info-grid{grid-template-columns:1fr}
  .manual-head{align-items:flex-start;padding:18px;flex-wrap:wrap}.manual-head h1{font-size:20px}
  .manual-body{padding:18px}.step{grid-template-columns:42px minmax(0,1fr);padding:15px}
  .topbar .meta{display:none}
}
@media print{
  .topbar,.sidebar,.search-row,.manual-cards,.actions,.breadcrumb{display:none!important}
  .layout{display:block}.main{max-width:none;padding:0}.manual{box-shadow:none}
  .video-wrap{display:none}.step{break-inside:avoid}
}