:root{
  --ink:#0f1b2d; --sub:#4a5a6e; --line:#e6ebf1;
  --brand:#0b8f72; --brand-d:#08705a; --bg:#f7f9fb; --card:#ffffff;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.7}
a{color:var(--brand-d);text-decoration:none}
ul{padding-left:20px}
li{margin:6px 0}
.wrap{max-width:1020px;margin:0 auto;padding:0 24px}
/* header */
header{position:sticky;top:0;background:rgba(255,255,255,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);z-index:10}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-weight:700;font-size:17px;letter-spacing:.3px;color:var(--ink)}
.logo span{color:var(--brand)}
.nav-links{display:flex;align-items:center;gap:20px;font-size:14px}
.nav-links a{color:var(--sub)}
.nav-links a:hover{color:var(--brand-d)}
.nav-links a.on{color:var(--brand-d);font-weight:600}
.lang-btn{border:1px solid var(--line);background:#fff;border-radius:999px;padding:6px 14px;cursor:pointer;font-size:13px;color:var(--sub)}
.lang-btn:hover{border-color:var(--brand);color:var(--brand-d)}
/* page head */
.phead{padding:56px 0 40px;background:linear-gradient(180deg,#ffffff 0%,var(--bg) 100%);border-bottom:1px solid var(--line)}
.phead h1{font-size:32px;margin-bottom:12px}
.phead p{color:var(--sub);max-width:760px;font-size:16px}
.tag{display:inline-block;font-size:13px;color:var(--brand-d);background:#e7f5f1;border:1px solid #c4e7de;border-radius:999px;padding:4px 14px;margin-bottom:18px}
/* hero */
.hero{padding:84px 0 64px;background:linear-gradient(180deg,#ffffff 0%,var(--bg) 100%);border-bottom:1px solid var(--line)}
.hero h1{font-size:38px;line-height:1.3;margin-bottom:18px}
.hero h1 em{font-style:normal;color:var(--brand-d)}
.hero p{font-size:17px;color:var(--sub);max-width:720px}
/* sections */
section{padding:56px 0;border-bottom:1px solid var(--line)}
h2{font-size:26px;margin-bottom:8px}
h3{font-size:17px}
.sec-sub{color:var(--sub);margin-bottom:30px;font-size:15px}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:24px}
.card h3{font-size:16px;margin-bottom:8px}
.card p{font-size:14px;color:var(--sub)}
.card .ic{font-size:22px;margin-bottom:10px;display:block}
.card ul{font-size:13.5px;color:var(--sub)}
/* stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;text-align:center}
.stats b{display:block;font-size:28px;color:var(--brand-d)}
.stats span{font-size:13.5px;color:var(--sub)}
/* info table */
.meta{display:grid;grid-template-columns:repeat(2,1fr);gap:14px 32px;margin-top:8px}
.meta div b{display:block;font-size:14px;margin-bottom:2px}
.meta div span{font-size:14px;color:var(--sub)}
table.info{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
table.info th,table.info td{padding:12px 16px;border-bottom:1px solid var(--line);font-size:14px;text-align:left;vertical-align:top}
table.info th{width:220px;background:#f2f6f9;color:var(--ink);font-weight:600}
table.info tr:last-child th,table.info tr:last-child td{border-bottom:none}
/* contact box */
.contact-box{background:#0f1b2d;color:#eaf0f6;border-radius:16px;padding:36px;display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.contact-box h2{color:#fff}
.contact-box p{color:#aebccb;font-size:14px;margin-top:6px}
.contact-box a{color:#5fdcbe;font-size:17px;font-weight:600;word-break:break-all}
/* contact page */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.contact-grid .card b{display:block;margin-bottom:4px}
.contact-grid .card p{font-size:14.5px}
footer{padding:32px 0;color:var(--sub);font-size:13px}
.foot-row{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
.foot-links{display:flex;gap:16px}
/* lang toggle */
[data-en]{display:none}
body.en [data-zh]{display:none!important}
body.en [data-en]{display:block}
body.en [data-en].inline,body.en [data-en].iflex{display:inline-flex}
@media(max-width:760px){
  .grid,.grid2,.stats,.meta,.contact-grid{grid-template-columns:1fr}
  .hero h1{font-size:28px}
  .phead h1{font-size:26px}
  .nav-links a{display:none}
  .lang-btn{display:inline-block}
}