/* SiteTalk 使用說明 — shared styles */
:root{
  --navy:#0C2440; --navy-2:#0A1E37; --navy-3:#13355C;
  --ink:#1A2738; --muted:#5C6B7E; --line:#E2E8F0; --line-2:#D3DBE6;
  --bg:#F4F7FB; --card:#FFFFFF;
  --orange:#FF6A2B; --orange-dark:#C2410C; --orange-soft:#FFF1E9;
  --blue-soft:#E8F1FB; --focus:#1D4ED8;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation:none!important;transition:none!important;}
}
body{
  font-family:"Noto Sans TC","PingFang TC","Microsoft JhengHei",system-ui,-apple-system,sans-serif;
  background:var(--bg); color:var(--ink);
  font-size:16px; line-height:1.7;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--orange-dark);}
a:focus-visible,button:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:4px;}

.wrap{max-width:1040px;margin:0 auto;padding:0 20px;}

/* ---------- top bar ---------- */
.topbar{
  position:sticky;top:0;z-index:100;
  background:var(--navy);color:#fff;
  box-shadow:0 1px 0 rgba(255,255,255,.08),0 2px 12px rgba(12,36,64,.25);
}
.topbar .wrap{display:flex;align-items:center;gap:16px;min-height:56px;}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-weight:800;font-size:17px;letter-spacing:.3px;flex-shrink:0;}
.brand svg{width:26px;height:26px;flex-shrink:0;}
.brand .sub{font-size:12px;font-weight:600;color:#9DB4D0;letter-spacing:1px;margin-left:2px;}
.topnav{display:flex;gap:4px;overflow-x:auto;-webkit-overflow-scrolling:touch;margin-left:auto;scrollbar-width:none;min-width:0;flex:0 1 auto;}
.topnav::-webkit-scrollbar{display:none;}
.topnav a{
  color:#CFE0F2;text-decoration:none;font-size:14px;font-weight:600;
  padding:8px 12px;border-radius:8px;white-space:nowrap;min-height:44px;display:flex;align-items:center;
  transition:background .2s,color .2s;cursor:pointer;
}
.topnav a:hover{background:rgba(255,255,255,.10);color:#fff;}
.topnav a[aria-current="page"]{background:var(--orange);color:#fff;}

/* ---------- mobile chapter dropdown ---------- */
.navdd{display:none;position:relative;margin-left:auto;}
.navdd summary{
  list-style:none;display:flex;align-items:center;gap:8px;cursor:pointer;user-select:none;
  color:#fff;font-size:14px;font-weight:700;white-space:nowrap;
  border:1px solid rgba(255,255,255,.30);border-radius:10px;
  padding:0 14px;min-height:44px;
}
.navdd summary::-webkit-details-marker{display:none;}
.navdd summary svg{width:15px;height:15px;flex-shrink:0;transition:transform .2s;}
.navdd[open] summary{background:rgba(255,255,255,.10);}
.navdd[open] summary svg{transform:rotate(180deg);}
.navdd .menu{
  position:absolute;right:0;top:calc(100% + 10px);z-index:200;
  min-width:200px;background:var(--navy-2);
  border:1px solid rgba(255,255,255,.15);border-radius:12px;
  box-shadow:0 12px 30px rgba(0,0,0,.35);padding:8px;
}
.navdd .menu a{
  display:flex;align-items:center;min-height:44px;padding:0 14px;border-radius:8px;
  color:#CFE0F2;text-decoration:none;font-size:15px;font-weight:600;
}
.navdd .menu a:hover{background:rgba(255,255,255,.10);color:#fff;}
.navdd .menu a[aria-current="page"]{background:var(--orange);color:#fff;}

/* ---------- chapter hero ---------- */
.hero{
  color:#fff;padding:40px 0 44px;
  background:radial-gradient(120% 150% at 88% 0%, #173e6b 0%, rgba(23,62,107,0) 55%),
             linear-gradient(135deg,#0C2440 0%,#0A1E37 100%);
}
.hero .kicker{color:var(--orange);font-weight:800;font-size:14px;letter-spacing:2px;margin-bottom:8px;}
.hero h1{font-size:clamp(24px,4.5vw,34px);font-weight:900;letter-spacing:.5px;line-height:1.3;}
.hero .lead{color:#A9C0DC;margin-top:10px;max-width:1280px;font-size:15px;}

/* ---------- main / steps ---------- */
main{padding:32px 0 56px;}
.chapter-note{
  background:var(--card);border:1px solid var(--line-2);border-left:5px solid var(--orange);
  border-radius:12px;padding:16px 20px;margin-bottom:28px;color:var(--ink);font-size:15px;
}
.chapter-note strong{color:var(--orange-dark);}

.step{
  display:flex;gap:28px;align-items:flex-start;
  background:var(--card);border:1px solid var(--line-2);border-radius:16px;
  padding:24px;margin-bottom:20px;
}
.step-text{flex:1;min-width:0;align-self:stretch;}
.step-head{display:flex;align-items:center;gap:12px;margin-bottom:10px;}
.step-no{
  width:40px;height:40px;border-radius:12px;flex-shrink:0;
  background:var(--orange);color:#fff;font-weight:900;font-size:19px;
  display:flex;align-items:center;justify-content:center;
}
.step-head h2{font-size:19px;font-weight:800;color:var(--navy);line-height:1.4;}
.step-text p{color:var(--ink);font-size:15.5px;margin-bottom:8px;}
.step-text .hint{color:var(--muted);font-size:14px;}
kbd,.ui{
  display:inline-block;background:var(--blue-soft);border:1px solid var(--line-2);
  border-radius:6px;padding:0 7px;font-family:inherit;font-size:.92em;font-weight:700;color:var(--navy-3);
}
.note,.warn{border-radius:10px;padding:12px 14px;font-size:14px;margin-top:12px;line-height:1.65;}
.note{background:var(--blue-soft);border:1px solid #C9DDF4;color:#123A66;}
.warn{background:var(--orange-soft);border:1px solid #FFD9C5;color:#8A3A12;}
.note strong,.warn strong{font-weight:800;}

.step-media{flex-shrink:0;width:280px;margin:0;}
.step-media img{
  width:100%;border-radius:12px;border:1px solid var(--line-2);
  box-shadow:0 4px 18px rgba(12,36,64,.10);
}
.step-media figcaption{font-size:13px;color:var(--muted);margin-top:8px;text-align:center;}
.step-media.wide{width:100%;}
.step.has-wide{flex-direction:column;}
.step.has-wide .step-media{width:100%;}
.step.has-wide .step-media img{max-width:820px;margin:0 auto;}

/* ---------- FAQ ---------- */
.step-no.q{font-size:15px;letter-spacing:.5px;}
.sec-head{margin:36px 0 18px;}
.sec-head .kicker{color:var(--orange);font-weight:800;font-size:13px;letter-spacing:2px;}
.sec-head h2{font-size:22px;font-weight:900;color:var(--navy);line-height:1.4;margin-top:2px;}
.sec-head p{color:var(--muted);font-size:14.5px;margin-top:6px;}
.step-text ol,.step-text ul{padding-left:24px;margin:6px 0 8px;}
.step-text li{font-size:15px;margin-bottom:6px;}
.tblwrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin-top:10px;}
table.spec{width:100%;border-collapse:collapse;font-size:14px;min-width:560px;}
table.spec th,table.spec td{border:1px solid var(--line-2);padding:9px 12px;text-align:left;vertical-align:top;line-height:1.6;}
table.spec th{background:var(--blue-soft);color:var(--navy-3);font-weight:800;white-space:nowrap;}
table.spec td strong{color:var(--orange-dark);}

/* ---------- download block ---------- */
.dl-card{
  display:flex;gap:24px;align-items:center;flex-wrap:wrap;
  background:linear-gradient(135deg,#0C2440 0%,#13355C 100%);color:#fff;
  border-radius:16px;padding:24px;margin-bottom:20px;
}
.dl-card .qr{
  background:#fff;border-radius:12px;padding:10px;width:170px;flex-shrink:0;display:block;
}
.dl-card .qr img{width:100%;border-radius:4px;}
.dl-card h2{font-size:20px;font-weight:900;margin-bottom:6px;}
.dl-card p{color:#C9D9EC;font-size:14.5px;margin-bottom:10px;}
.dl-card .url a{
  display:inline-block;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);
  color:#fff;border-radius:8px;padding:8px 14px;font-weight:700;font-size:14px;
  text-decoration:none;word-break:break-all;min-height:44px;line-height:28px;
}
.dl-card .url a:hover{background:rgba(255,255,255,.2);}
.dl-card .dltext{flex:1;min-width:240px;}

/* ---------- index chapter cards ---------- */
.toc{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:28px;}
.toc a{
  display:flex;gap:16px;align-items:flex-start;text-decoration:none;
  background:var(--card);border:1px solid var(--line-2);border-radius:16px;padding:20px;
  transition:border-color .2s,box-shadow .2s,transform .2s;cursor:pointer;
}
.toc a:hover{border-color:var(--orange);box-shadow:0 6px 20px rgba(12,36,64,.10);transform:translateY(-2px);}
.toc .no{
  font-weight:900;font-size:15px;color:var(--orange);border:2px solid var(--orange);
  border-radius:10px;width:42px;height:42px;display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.toc h2{font-size:17.5px;font-weight:800;color:var(--navy);margin-bottom:4px;}
.toc p{font-size:14px;color:var(--muted);}
.toc .cnt{font-size:12.5px;color:var(--orange-dark);font-weight:700;margin-top:6px;display:block;}

/* ---------- prev / next pager ---------- */
.pager{display:flex;gap:14px;margin-top:32px;}
.pager a{
  flex:1;background:var(--card);border:1px solid var(--line-2);border-radius:14px;
  padding:14px 18px;text-decoration:none;transition:border-color .2s,box-shadow .2s;min-height:44px;
}
.pager a:hover{border-color:var(--orange);box-shadow:0 4px 14px rgba(12,36,64,.08);}
.pager .dir{font-size:12.5px;color:var(--muted);display:block;}
.pager .ttl{font-size:15.5px;font-weight:800;color:var(--navy);}
.pager a.next{text-align:right;}
.pager a.spacer{visibility:hidden;pointer-events:none;}

/* ---------- footer ---------- */
.footer{border-top:1px solid var(--line-2);padding:22px 0 34px;color:var(--muted);font-size:13px;}
.footer .wrap{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;}

/* ---------- responsive ---------- */
@media (max-width:760px){
  .topnav{display:none;}
  .navdd{display:block;}
  .step{flex-direction:column;padding:18px;}
  .step-media{width:100%;}
  .step-media img{max-width:320px;margin:0 auto;}
  .step.has-wide .step-media img{max-width:100%;}
  .toc{grid-template-columns:1fr;}
  .hero{padding:30px 0 34px;}
  .dl-card{justify-content:center;text-align:center;}
  .dl-card .qr{width:200px;}
  .pager{flex-direction:column;}
  .pager a.next{text-align:left;}
  .pager a.spacer{display:none;}
}