/* ─────────────────────────────────────────────
   使用手冊（/manual/、/en/manual/、/ja/manual/ 共用）
   色票與導覽列沿用首頁 web/index.html；版面改成安靜的文件頁：左目錄＋右內文
   ───────────────────────────────────────────── */
:root{
  --bg:        #eaf6fb;
  --bg-soft:   #dceef6;
  --ink:       #11313e;
  --ink-soft:  #4a6772;
  --ink-faint: #7d96a0;
  --water-mid: #2d8fb6;
  --water-deep:#0f5273;
  --duck:      #ffd004;
  --duck-deep: #f9a703;
  --amber:     #c77700;
  --accent:    #0f9bc7;
  --card:      #ffffff;
  --line:      #cde4ee;
  --maxw:      1180px;
  --font: "PingFang TC","Noto Sans TC","Heiti TC","Helvetica Neue",
          system-ui,-apple-system,"Segoe UI",sans-serif;
}
html[lang="ja"]{ --font: "Hiragino Sans","Hiragino Kaku Gothic ProN","Noto Sans JP","Helvetica Neue",system-ui,-apple-system,sans-serif; }
html[lang="en"]{ --font: system-ui,-apple-system,"Helvetica Neue","Segoe UI",sans-serif; }

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{
  font-family:var(--font);
  color:var(--ink);
  background:radial-gradient(1200px 700px at 50% -10%, #fbfeff 0%, var(--bg) 45%, var(--bg-soft) 100%) fixed;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
button{font-family:inherit}

/* ── 導覽（同首頁） ── */
header.nav{
  position:sticky;top:0;z-index:50;
  backdrop-filter:saturate(160%) blur(14px);
  -webkit-backdrop-filter:saturate(160%) blur(14px);
  background:rgba(234,246,251,.82);
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;
  height:62px;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;letter-spacing:.2px;white-space:nowrap}
.brand .logo{width:30px;height:30px;display:block;object-fit:contain}
.nav-links{display:flex;gap:26px;align-items:center}
.nav-links > a{color:var(--ink-soft);font-size:14.5px;font-weight:600;transition:color .2s}
.nav-links > a:hover,.nav-links > a.cur{color:var(--accent)}
.nav-links > a.pill-soon{
  font-size:13px;font-weight:700;color:#0c4861;white-space:nowrap;
  background:linear-gradient(180deg,#ffe27a,var(--duck));
  padding:7px 15px;border-radius:999px;
  box-shadow:0 6px 16px -6px rgba(249,167,3,.7);
}
.lang-menu{position:relative}
.lang-btn{display:flex;align-items:center;gap:6px;border:1px solid var(--line);
  background:rgba(255,255,255,.55);border-radius:999px;padding:6px 12px;cursor:pointer;white-space:nowrap;
  font-size:13px;font-weight:700;color:var(--ink-soft);transition:color .2s,border-color .2s}
.lang-btn:hover{color:var(--amber);border-color:#f0d9a8}
.lang-btn .chev{font-size:9px;transition:transform .2s}
.lang-menu.open .lang-btn .chev{transform:rotate(180deg)}
.lang-list{position:absolute;right:0;top:calc(100% + 10px);min-width:136px;
  background:rgba(255,255,255,.95);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border:1px solid var(--line);border-radius:14px;padding:6px;
  box-shadow:0 18px 40px -16px rgba(15,82,115,.45);
  opacity:0;transform:translateY(-6px);pointer-events:none;transition:.2s}
.lang-menu.open .lang-list{opacity:1;transform:none;pointer-events:auto}
.lang-list a{display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:8px 12px;border-radius:9px;font-size:14px;font-weight:600;color:var(--ink-soft)}
.lang-list a:hover{background:rgba(15,155,199,.08);color:var(--ink)}
.lang-list a.cur{color:var(--amber);font-weight:800}
.lang-list a.cur::after{content:"✓";font-size:12px}
@media(max-width:680px){
  .nav-links > a:not(.pill-soon){display:none}
  .nav-inner{padding:0 15px}
  .nav-links{gap:12px}
  .brand{font-size:16px;gap:8px}
  .brand .logo{width:26px;height:26px}
  .lang-btn{font-size:12px;padding:5px 10px;gap:5px}
  .nav-links > a.pill-soon{font-size:12px;padding:6px 12px}
}

/* ── 版面：左目錄＋右內文 ── */
.doc{max-width:var(--maxw);margin:0 auto;padding:36px 24px 40px;
  display:grid;grid-template-columns:230px minmax(0,1fr);gap:48px;align-items:start}
.toc{position:sticky;top:86px;max-height:calc(100vh - 106px);overflow:auto}
.toc-box summary{list-style:none;font-size:12px;font-weight:800;letter-spacing:.12em;
  text-transform:uppercase;color:var(--ink-faint);padding:0 12px 10px;cursor:default}
.toc-box summary::-webkit-details-marker{display:none}
.toc ol{list-style:none}
.toc li a{display:block;padding:6px 12px;border-radius:9px;font-size:14px;font-weight:600;
  color:var(--ink-soft);line-height:1.4;transition:background .15s,color .15s}
.toc li a:hover{background:rgba(15,155,199,.08);color:var(--ink)}
.toc li a.on{background:rgba(255,208,4,.22);color:var(--ink);box-shadow:inset 3px 0 0 var(--duck-deep)}

.content{max-width:780px;min-width:0}
.doc-head{padding-bottom:26px;margin-bottom:10px;border-bottom:1px solid var(--line)}
.eyebrow{font-size:13px;font-weight:700;color:var(--water-mid);letter-spacing:.04em}
.doc-head h1{font-size:clamp(30px,4.2vw,42px);line-height:1.2;letter-spacing:-.01em;margin:6px 0 12px}
.lead{font-size:17px;color:var(--ink-soft)}
.legend{display:flex;flex-wrap:wrap;gap:8px 22px;margin-top:16px;font-size:13.5px;color:var(--ink-soft)}
.legend > span{display:flex;align-items:center;gap:8px}

section{padding:34px 0 8px;border-bottom:1px solid var(--line)}
section:last-of-type{border-bottom:0}
h2{font-size:26px;line-height:1.3;margin-bottom:12px;display:flex;flex-wrap:wrap;align-items:center;gap:10px}
h3{font-size:18px;line-height:1.4;margin:26px 0 8px}
p{margin:0 0 12px}
.content a{color:var(--accent);font-weight:600}
.content a:hover{text-decoration:underline}
ul,ol{margin:0 0 14px;padding-left:1.4em}
li{margin:4px 0}
ul li::marker{color:var(--water-mid)}
b,strong{font-weight:700}
code{font-family:ui-monospace,"SF Mono",Menlo,monospace;font-size:.88em;background:rgba(15,82,115,.07);
  border:1px solid var(--line);border-radius:6px;padding:1px 6px;word-break:break-all}

/* 步驟清單：圓形數字 */
ol.steps{list-style:none;padding-left:0;counter-reset:s}
ol.steps li{counter-increment:s;position:relative;padding-left:38px;margin:10px 0}
ol.steps li::before{content:counter(s);position:absolute;left:0;top:2px;width:26px;height:26px;
  border-radius:50%;background:linear-gradient(180deg,#ffe27a,var(--duck));color:#6b4a00;
  font-size:13px;font-weight:800;display:flex;align-items:center;justify-content:center}

/* 按鍵 */
kbd{display:inline-block;min-width:1.7em;padding:1px 7px;margin:0 2px;text-align:center;
  font-family:ui-rounded,system-ui,-apple-system,sans-serif;font-size:.86em;font-weight:700;color:var(--ink);
  background:linear-gradient(180deg,#fff,#eef5f8);border:1px solid #c3d8e2;border-bottom-width:2px;border-radius:6px;
  line-height:1.6;vertical-align:1px}

/* 標籤 */
.pro,.perm{display:inline-block;font-size:11px;font-weight:800;letter-spacing:.06em;line-height:1;
  padding:5px 8px;border-radius:999px;vertical-align:3px;white-space:nowrap}
.pro{background:linear-gradient(180deg,#ffe27a,var(--duck));color:#6b4a00}
.perm{background:rgba(15,155,199,.1);color:var(--water-deep);border:1px solid rgba(15,155,199,.25);letter-spacing:0}
h2 .pro,h2 .perm{vertical-align:0}

/* 表格 */
table{width:100%;border-collapse:separate;border-spacing:0;margin:6px 0 16px;font-size:15px;
  background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden}
th,td{text-align:left;vertical-align:top;padding:10px 14px;border-bottom:1px solid var(--line)}
tr:last-child td{border-bottom:0}
th{background:#f3f9fc;font-size:13px;font-weight:800;color:var(--ink-soft)}
td:first-child{font-weight:600;min-width:7.5em;max-width:44%}
@media(max-width:620px){
  th,td{padding:9px 11px}
}

/* 提示框 */
.note{background:rgba(255,208,4,.13);border:1px solid rgba(249,167,3,.35);border-radius:14px;
  padding:12px 16px;margin:12px 0 16px;font-size:15px}
.note b{margin-right:4px}

/* 疑難排解 Q&A */
details.qa{background:var(--card);border:1px solid var(--line);border-radius:14px;margin:10px 0;padding:0 16px}
details.qa summary{cursor:pointer;font-weight:700;padding:13px 0;list-style:none;display:flex;gap:10px;align-items:baseline}
details.qa summary::-webkit-details-marker{display:none}
details.qa summary::before{content:"＋";color:var(--water-mid);font-weight:800;flex:none}
details.qa[open] summary::before{content:"－"}
details.qa p{color:var(--ink-soft);padding-bottom:4px}

.doc-foot{margin-top:30px;color:var(--ink-soft)}

footer{border-top:1px solid var(--line);font-size:13.5px;color:var(--ink-faint)}
.foot-inner{max-width:var(--maxw);margin:0 auto;padding:22px 24px;display:flex;flex-wrap:wrap;
  justify-content:space-between;gap:10px;align-items:center}
footer .brand{font-size:15px;color:var(--ink-soft);gap:6px}
footer .brand img{width:22px;height:22px;object-fit:contain}

/* ── 窄螢幕：目錄改成頁首可收合的方塊 ── */
@media(max-width:900px){
  .doc{grid-template-columns:1fr;gap:20px;padding:20px 16px 32px}
  .toc{position:static;max-height:none;overflow:visible}
  .toc-box{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:12px 8px}
  .toc-box summary{cursor:pointer;padding:2px 10px;display:flex;justify-content:space-between}
  .toc-box summary::after{content:"▾";transition:transform .2s}
  .toc-box[open] summary::after{transform:rotate(180deg)}
  .toc-box[open] summary{padding-bottom:8px}
  .toc ol{columns:2;column-gap:8px}
  .toc li a{font-size:13.5px;padding:5px 10px}
  h2{font-size:23px}
}
@media(max-width:420px){ .toc ol{columns:1} }
@media(prefers-reduced-motion:reduce){ html{scroll-behavior:auto} }