:root{
  --font:"Microsoft JhengHei","微軟正黑體","PingFang TC","Noto Sans TC","Noto Sans CJK TC","Heiti TC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --ink:#1f2933;--muted:#5b6876;--line:#e3e8ee;--bg:#f6f8fa;--card:#fff;
  --accent:#1f4e79;--accent-2:#2f6fab;--accent-soft:#e8f0f8;
  --us-com:#2f6fab;--intl-com:#2c8a6e;--us-gov:#9a4d2e;--intl-gov:#6b4fa0;
  --side-w:272px;--top-h:56px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.8;font-size:16px}
a{color:var(--accent-2)}
a:hover{color:var(--accent)}
.skip{position:absolute;left:-999px;top:0}
.skip:focus{left:8px;top:8px;z-index:100;background:#fff;padding:6px 10px}
/* top bar */
.topbar{position:fixed;inset:0 0 auto 0;height:var(--top-h);display:flex;align-items:center;gap:12px;padding:0 16px;background:var(--accent);color:#fff;z-index:30;box-shadow:0 1px 4px rgba(0,0,0,.15)}
.brand{color:#fff;text-decoration:none;font-weight:700;font-size:17px;letter-spacing:.04em;white-space:nowrap}
.brand:hover{color:#fff}
.icon-btn{background:transparent;border:1px solid rgba(255,255,255,.35);color:#fff;font-size:18px;width:38px;height:36px;border-radius:6px;cursor:pointer}
.icon-btn:hover{background:rgba(255,255,255,.12)}
.search{position:relative;margin-left:auto;width:min(420px,46vw)}
.search input{width:100%;height:36px;border-radius:18px;border:0;padding:0 16px;font:inherit;font-size:14px;outline:none}
.search input:focus{box-shadow:0 0 0 3px rgba(255,255,255,.35)}
.results{position:absolute;right:0;top:44px;width:min(560px,92vw);max-height:70vh;overflow:auto;background:#fff;color:var(--ink);border-radius:10px;box-shadow:0 10px 30px rgba(0,0,0,.2);padding:6px}
.results a{display:block;padding:10px 12px;border-radius:8px;text-decoration:none;color:var(--ink)}
.results a:hover,.results a.sel{background:var(--accent-soft)}
.results .r-title{font-weight:700;font-size:14px}
.results .r-count{color:var(--muted);font-weight:400;font-size:12px;margin-left:6px}
.results .r-snip{font-size:13px;color:var(--muted);line-height:1.6;margin-top:2px}
.results .none{padding:12px;color:var(--muted);font-size:14px}
mark{background:#ffe58a;color:inherit;padding:0 1px;border-radius:2px}
/* sidebar */
.sidebar{position:fixed;top:var(--top-h);bottom:0;left:0;width:var(--side-w);overflow-y:auto;background:#fff;border-right:1px solid var(--line);z-index:20;transition:transform .2s ease;padding:12px 0 40px}
.nav-group{font-size:12px;font-weight:700;color:var(--muted);letter-spacing:.08em;padding:14px 20px 4px}
.nav-item{display:flex;gap:10px;align-items:baseline;padding:6px 20px;color:var(--ink);text-decoration:none;font-size:14px;line-height:1.5;border-left:3px solid transparent}
.nav-item .n{font-variant-numeric:tabular-nums;color:var(--muted);font-size:12px;min-width:20px}
.nav-item:hover{background:var(--bg);color:var(--accent)}
.nav-item.active{background:var(--accent-soft);border-left-color:var(--accent);color:var(--accent);font-weight:700}
.backdrop{display:none}
main{margin-left:var(--side-w);padding:calc(var(--top-h) + 28px) 40px 40px;transition:margin .2s ease;min-height:100vh;outline:none}
body.nav-collapsed .sidebar{transform:translateX(-100%)}
body.nav-collapsed main{margin-left:0}
.foot{margin:48px auto 0;max-width:1180px;color:var(--muted);font-size:12px;border-top:1px solid var(--line);padding-top:16px}
/* home */
.hero{max-width:1180px;margin:0 auto 28px;background:linear-gradient(135deg,#1f4e79,#2f6fab);color:#fff;border-radius:14px;padding:32px 36px}
.hero h1{margin:4px 0 8px;font-size:32px;letter-spacing:.04em}
.hero .kicker{color:rgba(255,255,255,.8)}
.hero-sub{margin:0;opacity:.92;max-width:760px}
.hero-links{margin-top:16px;display:flex;gap:10px;flex-wrap:wrap}
.hero-links a{color:#fff;border:1px solid rgba(255,255,255,.5);border-radius:18px;padding:4px 14px;text-decoration:none;font-size:14px}
.hero-links a:hover{background:rgba(255,255,255,.15)}
.case-list,.intro-sec{max-width:1180px;margin:0 auto}
.intro-sec{margin-top:48px}
.sec-title{font-size:22px;margin:0 0 12px}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
.chip{font:inherit;font-size:14px;border:1px solid var(--line);background:#fff;border-radius:18px;padding:4px 14px;cursor:pointer;color:var(--ink)}
.chip b{font-weight:400;color:var(--muted);margin-left:2px}
.chip.active{background:var(--accent);border-color:var(--accent);color:#fff}
.chip.active b{color:rgba(255,255,255,.8)}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.card{--g:var(--accent);display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);border-top:4px solid var(--g);border-radius:10px;padding:16px 18px;text-decoration:none;color:var(--ink);transition:box-shadow .15s,transform .15s}
.card:hover{box-shadow:0 6px 18px rgba(31,78,121,.14);transform:translateY(-2px);color:var(--ink)}
.card[hidden]{display:none}
.g-us-com{--g:var(--us-com)}.g-intl-com{--g:var(--intl-com)}.g-us-gov{--g:var(--us-gov)}.g-intl-gov{--g:var(--intl-gov)}
.card-top{display:flex;align-items:center;gap:8px;font-size:12px}
.card-num{font-weight:700;color:var(--g)}
.grp{color:var(--muted)}
.ev{margin-left:auto;font-size:12px;font-weight:700;border-radius:4px;padding:1px 7px;white-space:nowrap;background:#eef1f4;color:#3b4652;cursor:help}
.ev-A{background:#e3f4ea;color:#1d6b3f}.ev-B{background:#e8f0f8;color:#1f4e79}.ev-C{background:#fdf2df;color:#8a5a00}.ev-D{background:#fbe7e7;color:#9b2c2c}
.card-client{margin:6px 0 2px;font-size:19px;line-height:1.4}
.card-sub{margin:0 0 10px;font-size:14px;color:var(--accent);font-weight:700;line-height:1.5}
.card-meta{display:grid;grid-template-columns:auto 1fr;gap:2px 10px;margin:0 0 10px;font-size:13px;line-height:1.55}
.card-meta dt{color:var(--muted)}
.card-meta dd{margin:0}
.card-sum{margin:auto 0 0;font-size:13.5px;color:#3b4652;line-height:1.7;display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}
.empty-filter{color:var(--muted)}
/* doc */
.doc{max-width:1180px;margin:0 auto}
.doc-head{position:relative;background:#fff;border:1px solid var(--line);border-left:6px solid var(--g,var(--accent));border-radius:10px;padding:22px 26px;margin-bottom:22px}
.kicker{font-size:13px;color:var(--muted);letter-spacing:.06em;font-weight:700}
.doc-head h1{margin:4px 0 12px;font-size:28px;line-height:1.35;padding-right:110px}
.h1-sub{display:block;font-size:19px;color:var(--accent);margin-top:4px}
.meta-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:8px 20px;font-size:14px;line-height:1.6}
.meta-grid > div > span:first-child{display:block;font-size:12px;color:var(--muted);font-weight:700}
.meta-grid .ev{margin-left:0}
.print-btn{position:absolute;top:18px;right:18px;font:inherit;font-size:13px;background:#fff;border:1px solid var(--line);border-radius:6px;padding:4px 10px;cursor:pointer;color:var(--ink)}
.print-btn:hover{background:var(--bg)}
.doc-layout{display:grid;grid-template-columns:1fr;gap:24px}
.doc-toc{background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px 18px;font-size:14px}
.doc-toc-title{font-weight:700;color:var(--muted);font-size:12px;letter-spacing:.08em;margin-bottom:4px}
.doc-toc ol{list-style:none;margin:0;padding:0;columns:2;column-gap:24px}
.doc-toc li{break-inside:avoid;line-height:1.5;padding:3px 0}
.doc-toc a{text-decoration:none;color:var(--ink)}
.doc-toc a:hover,.doc-toc a.on{color:var(--accent-2)}
.doc-toc a.on{font-weight:700}
@media (min-width:1280px){
  .doc-layout{grid-template-columns:minmax(0,1fr) 240px}
  .doc-toc{grid-column:2;grid-row:1;position:sticky;top:calc(var(--top-h) + 20px);align-self:start;max-height:calc(100vh - var(--top-h) - 40px);overflow:auto}
  .doc-toc ol{columns:1}
  .doc-body{grid-column:1;grid-row:1}
}
.doc-body{background:#fff;border:1px solid var(--line);border-radius:10px;padding:8px 36px 28px;min-width:0}
.doc-body h2{font-size:22px;margin:34px 0 12px;padding-bottom:6px;border-bottom:2px solid var(--accent-soft);color:var(--accent)}
.doc-body h3{font-size:18px;margin:24px 0 8px}
.doc-body h2,.doc-body h3,.intro-sec,.doc-head{scroll-margin-top:calc(var(--top-h) + 16px)}
.doc-body p,.doc-body li{max-width:52em}
.doc-body li{margin:3px 0}
.doc-body ul,.doc-body ol{padding-left:1.5em}
.doc-body hr{border:0;border-top:1px solid var(--line);margin:24px 0}
.doc-body blockquote{margin:12px 0;padding:8px 16px;border-left:4px solid var(--accent-soft);background:var(--bg);color:#3b4652}
.doc-body strong{color:#14202b}
.doc-body a{word-break:break-word}
.tag-note{color:#8a5a00;font-size:.92em;font-weight:700}
.table-wrap{overflow-x:auto;margin:14px 0;border:1px solid var(--line);border-radius:8px;-webkit-overflow-scrolling:touch}
table{border-collapse:collapse;width:100%;font-size:14px;line-height:1.6}
th,td{padding:8px 12px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
th{background:var(--accent);color:#fff;font-weight:700;white-space:nowrap;position:sticky;top:0}
tbody tr:nth-child(even){background:#f3f6f9}
tbody tr:hover{background:#e8f0f8}
td{min-width:5em}
.pager{display:flex;justify-content:space-between;gap:12px;margin-top:24px}
.pager a{background:#fff;border:1px solid var(--line);border-radius:8px;padding:10px 16px;text-decoration:none;font-size:14px}
.pager a:hover{border-color:var(--accent-2)}
.page[hidden]{display:none}
/* mobile */
@media (max-width:900px){
  main{margin-left:0;padding:calc(var(--top-h) + 16px) 14px 30px}
  .sidebar{transform:translateX(-100%);box-shadow:4px 0 20px rgba(0,0,0,.15)}
  body.nav-open .sidebar{transform:none}
  body.nav-open .backdrop{display:block;position:fixed;inset:var(--top-h) 0 0 0;background:rgba(0,0,0,.35);z-index:15}
  body.nav-collapsed main{margin-left:0}
  .brand{font-size:15px}
  .search{width:auto;flex:1}
  .hero{padding:22px 20px}.hero h1{font-size:25px}
  .cards{grid-template-columns:1fr}
  .doc-head{padding:18px 16px}
  .doc-head h1{font-size:22px;padding-right:0}
  .h1-sub{font-size:16px}
  .print-btn{position:static;margin-top:12px}
  .doc-body{padding:4px 16px 20px}
  .doc-toc ol{columns:2;column-gap:14px;font-size:13.5px}
  .doc-body h2{font-size:19px}
  th{white-space:normal}
}
@media (max-width:420px){.brand{display:none}}
/* print */
@media print{
  @page{margin:16mm 14mm}
  body{background:#fff;font-size:11pt;line-height:1.65}
  .topbar,.sidebar,.backdrop,.pager,.print-btn,.doc-toc,.foot,.skip,.hero,.case-list{display:none!important}
  main{margin:0!important;padding:0!important}
  .doc-head,.doc-body{border:0;padding:0;box-shadow:none}
  .doc-head{border-left:0;margin-bottom:10px;border-bottom:2px solid #1f4e79;padding-bottom:10px}
  .doc-layout{display:block}
  .table-wrap{overflow:visible;border:0}
  table{font-size:9.5pt}
  th{background:#e8f0f8!important;color:#000;white-space:normal;-webkit-print-color-adjust:exact;print-color-adjust:exact}
  tbody tr:nth-child(even){background:#f3f6f9!important;-webkit-print-color-adjust:exact;print-color-adjust:exact}
  tr,img{break-inside:avoid}
  h2,h3{break-after:avoid}
  a{color:#1f4e79;text-decoration:none}
  .intro-sec{margin-top:0}
}