.manual-body{background:#f3f5f7;color:#2f343b}
.manual-topbar{position:sticky;top:0}
.manual-brand{color:var(--text)}
.manual-brand:hover{color:var(--text)}
.manual-shell{display:grid;grid-template-columns:250px minmax(0,920px);justify-content:center;align-items:start;gap:42px;padding:46px 28px 90px}
.manual-nav{position:sticky;top:86px}
.manual-nav-inner{padding:12px;border-left:1px solid #dce1e6}
.manual-nav-title{padding:5px 12px 10px;color:var(--muted);font-size:11px;font-weight:800;letter-spacing:.12em;text-transform:uppercase}
.manual-nav a{display:block;padding:7px 12px;border-left:2px solid transparent;color:var(--text-2);font-size:13px}
.manual-nav a:hover,.manual-nav a:focus-visible{border-left-color:var(--primary);background:var(--primary-soft);color:var(--primary-dark)}
.manual-content{min-width:0}
.manual-hero{padding:56px 58px;border:1px solid #dfe4e8;border-radius:18px;background:linear-gradient(135deg,#fff 20%,#eef5fc 100%);box-shadow:0 16px 45px rgba(27,47,69,.08)}
.manual-kicker{margin-bottom:18px;color:var(--primary-dark);font-size:11px;font-weight:800;letter-spacing:.18em}
.manual-hero h1{margin:0 0 20px;color:#25313c;font-size:42px;line-height:1.25;letter-spacing:-.035em}
.manual-hero>p{max-width:680px;margin:0;color:#5f6b76;font-size:16px;line-height:1.9}
.manual-meta{display:flex;gap:18px;flex-wrap:wrap;margin-top:24px;color:var(--muted);font-size:12px}
.manual-section{position:relative;margin-top:34px;padding:46px 50px;border:1px solid #e0e4e8;border-radius:14px;background:#fff;box-shadow:0 8px 30px rgba(27,47,69,.045);scroll-margin-top:76px}
.section-number{position:absolute;top:34px;right:42px;color:#d7e3ef;font-size:40px;font-weight:800;line-height:1}
.manual-section h2{margin:0 70px 8px 0;color:#28343e;font-size:26px;line-height:1.4;letter-spacing:-.02em}
.section-lead{margin:0 0 28px;color:#6b7680;font-size:14px}
.manual-cards{display:grid;gap:16px}
.two-columns{grid-template-columns:repeat(2,minmax(0,1fr))}
.manual-card{padding:24px;border:1px solid #e1e5e8;border-radius:12px;background:#fafbfc}
.manual-card h3{margin:0 0 8px;font-size:18px}
.manual-card p{margin:0 0 16px;color:#65717b;font-size:13px}
.manual-card-icon{display:flex;width:42px;height:42px;align-items:center;justify-content:center;margin-bottom:16px;border-radius:11px;font-weight:800}
.role-student .manual-card-icon{background:var(--primary-soft);color:var(--primary-dark)}
.role-teacher .manual-card-icon{background:var(--green-soft);color:var(--green)}
.file-label{margin:0 0 16px;color:#5c6974;font-size:12px}
.manual-notice{display:flex;gap:13px;margin-top:22px;padding:15px 17px;border:1px solid;border-radius:10px;font-size:13px}
.manual-notice strong{display:block;margin-bottom:2px}
.manual-notice p{margin:0;color:inherit}
.notice-icon{display:flex;width:22px;height:22px;flex:none;align-items:center;justify-content:center;border-radius:50%;font-size:12px;font-weight:800}
.manual-notice.warning{border-color:#efd49e;background:#fff8e9;color:#7f580b}
.manual-notice.warning .notice-icon{background:#f4d99e;color:#6e4a04}
.manual-notice.info{border-color:#bdd8ef;background:#f2f8fe;color:#315f85}
.manual-notice.info .notice-icon{background:#cde4f7;color:#235676}
.manual-notice.success{border-color:#b9dfcb;background:#f0faf5;color:#216744}
.manual-notice.success .notice-icon{background:#ccebd9;color:#1c613e}
.step-list{margin:0;padding:0;list-style:none}
.step-list li{display:grid;grid-template-columns:42px minmax(0,1fr);gap:17px;padding:0 0 28px;position:relative}
.step-list li:not(:last-child)::before{content:"";position:absolute;top:42px;bottom:0;left:20px;width:1px;background:#dce4eb}
.step-list li:last-child{padding-bottom:0}
.step-marker{display:flex;width:42px;height:42px;align-items:center;justify-content:center;border-radius:50%;background:#273a4a;color:#fff;font-size:13px;font-weight:800;z-index:1}
.step-list h3{margin:6px 0 4px;font-size:16px}
.step-list p{margin:0;color:#63707b;font-size:14px}
.step-list.compact li{padding-bottom:22px}
.code-sample{margin-top:15px;border:1px solid #dce2e6;border-radius:8px;overflow:hidden}
.code-sample-title{padding:7px 12px;background:#eef1f3;color:#687580;font-size:11px;font-weight:700}
.code-sample pre{margin:0;padding:14px 16px;background:#27323b;color:#eef3f6;font:13px/1.8 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;overflow:auto}
.flow-strip{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:30px;padding:18px;border-radius:10px;background:#f3f7fa;color:#405362;font-size:13px;font-weight:700}
.flow-strip div:not(.flow-arrow){display:flex;align-items:center;gap:8px}
.flow-strip span{display:flex;width:26px;height:26px;align-items:center;justify-content:center;border-radius:50%;background:#fff;color:var(--primary-dark);box-shadow:0 1px 5px rgba(0,0,0,.08)}
.flow-arrow{color:#9dacb7}
.subsection-title{margin:34px 0 12px;font-size:17px}
.manual-table-wrap{overflow:auto;border:1px solid #dde3e7;border-radius:9px}
.manual-table{width:100%;border-collapse:collapse;font-size:13px}
.manual-table th,.manual-table td{padding:12px 15px;border-bottom:1px solid #e5e9ec;text-align:left}
.manual-table thead th{background:#f3f5f7;color:#52616d;font-size:11px;letter-spacing:.03em}
.manual-table tbody tr:last-child th,.manual-table tbody tr:last-child td{border-bottom:0}
.guide-block{display:grid;grid-template-columns:110px minmax(0,1fr);gap:24px;padding:23px 0;border-top:1px solid #e5e9ec}
.guide-block:first-of-type{border-top:0}
.guide-label{width:max-content;padding:4px 10px;border-radius:20px;background:#eaf1f7;color:#3c607d;font-size:11px;font-weight:800}
.guide-block h3{margin:0 0 6px;font-size:17px}
.guide-block p{margin:0;color:#63707b;font-size:14px}
.manual-list{margin:7px 0 0;padding-left:20px;color:#5e6c77;font-size:14px}
.manual-list li{margin:5px 0}
.minor-note{margin-top:10px!important;color:#7a858e!important;font-size:12px!important}
.demo-credentials{display:grid;grid-template-columns:90px 1fr;gap:7px 12px;margin:12px 0 0;font-size:13px}
.demo-credentials dt{color:#7a858e}
.demo-credentials dd{margin:0;font-weight:700}
.faq-list{border-top:1px solid #e1e6e9}
.faq-list details{border-bottom:1px solid #e1e6e9}
.faq-list summary{padding:17px 36px 17px 2px;cursor:pointer;font-weight:700;list-style:none;position:relative}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:"＋";position:absolute;right:8px;color:#7d8b96;font-size:18px;font-weight:400}
.faq-list details[open] summary::after{content:"−"}
.faq-list details>div{padding:0 34px 18px 2px;color:#65717b;font-size:13px}
.risk-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.risk-grid article{padding:20px;border:1px solid #e1e5e8;border-radius:10px;background:#fafbfc}
.risk-grid h3{margin:7px 0 6px;font-size:16px}
.risk-grid p{margin:0;color:#68747e;font-size:13px}
.risk-level{color:#a26006;font-size:10px;font-weight:800;letter-spacing:.08em}
.checklist-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.checklist-grid article{padding:22px 24px;border-radius:10px;background:#f5f7f9}
.checklist-grid h3{margin:0 0 12px;font-size:17px}
.check-list{margin:0;padding:0;list-style:none}
.check-list li{position:relative;margin:9px 0;padding-left:27px;color:#5d6a75;font-size:13px}
.check-list li::before{content:"";position:absolute;left:0;top:2px;width:15px;height:15px;border:1px solid #aeb9c1;border-radius:3px;background:#fff}
.manual-footer{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;padding:34px 6px 0;color:#707c86;font-size:12px}
.manual-footer p{margin:3px 0 0}
@media(max-width:900px){
  .manual-shell{display:block;padding:24px 18px 70px}
  .manual-nav{position:static;margin-bottom:20px}
  .manual-nav-inner{display:flex;gap:5px;overflow-x:auto;padding:8px;border:1px solid #dce1e6;border-radius:10px;background:#fff}
  .manual-nav-title{display:none}
  .manual-nav a{flex:none;border:0;border-radius:6px;white-space:nowrap}
  .manual-hero{padding:38px 32px}
  .manual-hero h1{font-size:34px}
  .manual-section{padding:38px 32px}
}
@media(max-width:640px){
  .manual-topbar .role-pill{display:none}
  .manual-topbar{padding:0 10px}
  .manual-topbar .brand span:last-child{display:none}
  .manual-shell{padding:14px 10px 50px}
  .manual-hero{padding:30px 22px;border-radius:12px}
  .manual-hero h1{font-size:28px}
  .manual-section{margin-top:16px;padding:31px 21px}
  .manual-section h2{margin-right:44px;font-size:22px}
  .section-number{top:30px;right:20px;font-size:31px}
  .two-columns,.risk-grid,.checklist-grid{grid-template-columns:1fr}
  .flow-strip{align-items:stretch;flex-direction:column}
  .flow-arrow{transform:rotate(90deg);text-align:center}
  .guide-block{grid-template-columns:1fr;gap:8px}
  .manual-footer{align-items:flex-start;flex-direction:column}
}
@media print{
  .manual-topbar,.manual-nav,.manual-footer a{display:none!important}
  .manual-body{background:#fff}
  .manual-shell{display:block;padding:0}
  .manual-hero,.manual-section{break-inside:avoid;margin:0 0 12mm;padding:10mm;border:1px solid #ccc;box-shadow:none}
  .manual-hero h1{font-size:28pt}
  .manual-content{max-width:none}
}