:root{--ink:#222;--muted:#666;--bg:#fff;--soft:#f3f5f7;--line:#dfe3e6;--accent:#1f5f8b;--accent-d:#164666;--max:1080px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font:16px/1.75 -apple-system,"Segoe UI","Noto Sans TC","PingFang TC","Microsoft JhengHei",sans-serif;color:var(--ink);background:var(--bg)}
img{max-width:100%;height:auto}
a{color:var(--accent)}a:hover{color:var(--accent-d)}
.wrap{max-width:var(--max);margin:0 auto;padding:0 16px}
/* header */
.site-header{position:sticky;top:0;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;justify-content:space-between;min-height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:700;letter-spacing:.08em}
.site-nav ul{list-style:none;margin:0;padding:0;display:flex;gap:4px}
.site-nav a,.site-nav button{font:inherit;color:var(--ink);background:none;border:0;padding:10px 12px;cursor:pointer;text-decoration:none;display:block;text-align:left}
.site-nav li:hover>a,.site-nav li:hover>button,.site-nav li.current>a,.site-nav li.current>button{color:var(--accent)}
.has-sub{position:relative}
.has-sub>button::after{content:"▾";margin-left:6px;font-size:.8em}
.has-sub ul{display:none;position:absolute;left:0;top:100%;min-width:230px;background:#fff;border:1px solid var(--line);box-shadow:0 8px 20px rgba(0,0,0,.08);flex-direction:column;gap:0}
.has-sub:hover ul,.has-sub:focus-within ul,.has-sub.open ul{display:flex}
.has-sub ul a{padding:9px 16px}
.has-sub ul a:hover,.has-sub ul a[aria-current]{background:var(--soft);color:var(--accent)}
.menu-toggle{display:none;background:none;border:0;padding:12px;cursor:pointer}
.menu-toggle span,.menu-toggle span::before,.menu-toggle span::after{display:block;width:24px;height:2px;background:var(--ink);position:relative;content:""}
.menu-toggle span::before{position:absolute;top:-7px}.menu-toggle span::after{position:absolute;top:7px}
/* content */
.content{padding-top:32px;padding-bottom:56px;min-height:60vh}
h1,h2,h3,h4{line-height:1.3;margin:1.6em 0 .6em}
.content>h2:first-child,.content>section:first-child>h2:first-child{margin-top:0}
h2{font-size:1.6rem}h3{font-size:1.3rem}h4{font-size:1.1rem}
hr{border:0;border-top:1px solid var(--line);margin:28px 0}
section{padding:8px 0}
section+section{border-top:1px solid var(--line);margin-top:24px;padding-top:24px}
.text{margin:0 0 1em}
ul,ol{padding-left:1.4em}
figure{margin:12px 0}
figure img{display:block;margin:0 auto;border-radius:4px}
.cols{display:flex;gap:28px;margin:16px 0}
.col{min-width:0}
.cols>.col>figure img{width:100%;object-fit:cover}
.embed{position:relative;aspect-ratio:16/9;margin:16px 0}
.embed iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.table-wrap{overflow-x:auto}
table{border-collapse:collapse}td,th{border:1px solid var(--line);padding:6px 10px;vertical-align:top}
.button{display:inline-block;padding:7px 18px;margin:6px 0;border:1px solid var(--accent);border-radius:3px;color:var(--accent);text-decoration:none;font-size:.9rem;letter-spacing:.04em}
.button:hover{background:var(--accent);color:#fff}
.content a{overflow-wrap:anywhere}
.contact{display:grid;grid-template-columns:max-content 1fr;gap:8px 24px}
.contact dt{font-weight:700}.contact dd{margin:0}
.lead{font-size:1.1rem;color:var(--muted)}
/* footer */
.site-footer{background:var(--soft);border-top:1px solid var(--line);padding:28px 0;color:var(--muted);font-size:.9rem}
.site-footer .wrap{display:flex;gap:20px;align-items:center}
.site-footer p{margin:0}
/* mobile */
@media (max-width:820px){
 .menu-toggle{display:block}
 .site-nav{display:none;position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--line);max-height:80vh;overflow:auto}
 .site-nav.open{display:block}
 .site-nav ul{flex-direction:column;gap:0;padding:8px 16px}
 .has-sub ul{position:static;display:none;box-shadow:none;border:0;border-left:3px solid var(--line);margin-left:12px}
 .has-sub.open ul{display:flex}
 .has-sub:hover ul{display:none}.has-sub.open:hover ul{display:flex}
 .cols{flex-direction:column;gap:0}
 .col{flex:none!important}
 .site-footer .wrap{flex-direction:column;align-items:flex-start}
}