:root{
  --ink:#1A1F3C; --ink-2:#262C52; --steel:#5B6478;
  --line:#E2E6EE; --bg:#F4F6F9; --surface:#FFFFFF;
  --accent:#00A7B5; --accent-2:#00C2D1; --accent-soft:#E3F7F9;
  --ok:#1F7A4D; --warn:#9A6B00; --danger:#B42318;
  --r:4px; --maxw:1180px;
  --ff:-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:var(--ff);color:var(--ink);background:var(--bg);line-height:1.6;font-size:15px;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
h1,h2,h3,h4,h5{margin:0;font-weight:650;letter-spacing:-.01em}
p{margin:0}
table{border-collapse:collapse;width:100%}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.section{padding:64px 0}
.section.alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section.dark{background:var(--ink);color:#fff}
.section.dark .steel{color:#B7BEDB}

/* nav */
.nav{position:sticky;top:0;z-index:50;background:var(--surface);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;gap:26px;height:64px}
.brand{display:flex;align-items:center;gap:9px;font-weight:750;font-size:17px;letter-spacing:.01em;margin-right:8px}
.brand .mark{width:26px;height:26px;border-radius:6px;background:var(--ink);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.brand .mark svg{width:16px;height:16px;color:var(--accent-2)}
.menu{display:flex;gap:22px;flex:1}
.menu a{font-size:14px;color:var(--steel);font-weight:500}
.menu a:hover,.menu a.on{color:var(--ink)}
.nav-right{display:flex;align-items:center;gap:16px}
.lang{font-size:12.5px;color:var(--steel)}
.lang b{color:var(--ink)}
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 18px;border-radius:var(--r);font-size:14px;font-weight:650;border:1px solid transparent;cursor:pointer}
.btn.primary{background:var(--ink);color:#fff}
.btn.primary:hover{background:var(--ink-2)}
.btn.accent{background:var(--accent);color:#fff}
.btn.accent:hover{background:var(--accent-2)}
.btn.ghost{border-color:var(--line);color:var(--ink);background:#fff}
.btn.ghost.light{border-color:rgba(255,255,255,.35);color:#fff}
.btn.sm{padding:8px 14px;font-size:13px}

/* hero */
.hero{background:var(--ink);color:#fff;padding:60px 0 0}
.hero.has-photo{background-size:cover;background-position:center;background-blend-mode:multiply}
.hero .kicker{color:var(--accent-2);font-size:13px;font-weight:650;letter-spacing:.08em;text-transform:uppercase;margin-bottom:12px}
.hero h1{font-size:38px;line-height:1.22;max-width:820px;margin-bottom:16px}
.hero .lead{color:#C3CAE4;max-width:700px;font-size:16px}
.hero .actions{display:flex;gap:14px;margin-top:26px;flex-wrap:wrap}
.statbar{margin-top:40px;border-top:1px solid rgba(255,255,255,.15)}
.statbar .wrap{display:flex;gap:0}
.stat{flex:1;padding:22px 24px;border-right:1px solid rgba(255,255,255,.12)}
.stat:last-child{border-right:0}
.stat b{display:block;font-size:24px;color:var(--accent-2)}
.stat span{font-size:12.5px;color:#B7BEDB}

/* page-head (非首页) */
.page-head{background:var(--ink);color:#fff;padding:44px 0}
.page-head .crumb{font-size:12.5px;color:#9FA8CC;margin-bottom:10px}
.page-head .crumb a{color:#C3CAE4}
.page-head h1{font-size:28px}
.page-head .sub{color:#C3CAE4;margin-top:10px;max-width:760px;font-size:14.5px}

/* grid/card */
.grid{display:grid;gap:18px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.g5{grid-template-columns:repeat(5,1fr)}
@media(max-width:980px){.g4,.g5{grid-template-columns:repeat(2,1fr)}}
@media(max-width:680px){.g2,.g3,.g4,.g5{grid-template-columns:1fr}}

.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:22px}
.card .ic{width:32px;height:32px;color:var(--accent);margin-bottom:14px}
.card h3{font-size:16px;color:var(--ink);margin-bottom:6px}
.card p{color:var(--steel);font-size:13.5px}
.card.anchor{border-top:3px solid var(--accent)}
.tag{display:inline-block;font-size:10.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;padding:3px 8px;border-radius:3px;background:var(--accent-soft);color:var(--accent);margin-top:10px}

.sec-head{max-width:720px;margin-bottom:30px}
.kicker{color:var(--accent);font-size:12.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;margin-bottom:10px}
.sec-head h2{font-size:26px;margin-bottom:10px}
.sec-head p{color:var(--steel);font-size:15px}

/* split-media */
.split-media{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:center}
.split-media img{width:100%;height:auto;border-radius:var(--r);object-fit:cover;aspect-ratio:4/3}
@media(max-width:860px){.split-media{grid-template-columns:1fr}.split-media .img-col{order:-1}}

/* table */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r)}
.table{font-size:13.5px}
.table th,.table td{padding:10px 14px;text-align:left;border-bottom:1px solid var(--line)}
.table th{background:var(--bg);font-weight:650;color:var(--steel);font-size:12px;text-transform:uppercase;letter-spacing:.04em}
.table tr:last-child td{border-bottom:0}

/* faq */
.faq details{border-bottom:1px solid var(--line);padding:16px 0}
.faq summary{cursor:pointer;font-weight:650;font-size:15px;list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:20px;color:var(--accent);font-weight:400}
.faq details[open] summary::after{content:"\2212"}
.faq-a{margin-top:12px;color:var(--steel);font-size:14px}

/* form */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-grid .full{grid-column:1/-1}
.form-field label{display:block;font-size:13px;font-weight:650;margin-bottom:6px;color:var(--ink)}
.form-field input,.form-field select,.form-field textarea{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:var(--r);font-size:14px;font-family:inherit;background:#fff}
.form-field textarea{min-height:100px;resize:vertical}
@media(max-width:680px){.form-grid{grid-template-columns:1fr}}

/* footer */
footer{background:var(--ink);color:#C3CAE4;padding:50px 0 24px}
footer h5{color:#fff;font-size:13px;margin-bottom:14px}
footer a{display:block;color:#9FA8CC;font-size:13.5px;padding:4px 0}
footer a:hover{color:#fff}
.footer-contact{list-style:none;padding:0;margin:0}
.footer-contact li{display:flex;align-items:flex-start;gap:8px;margin-bottom:10px;color:#9FA8CC;font-size:13.5px}
.footer-contact .ic{width:15px;height:15px;flex-shrink:0;margin-top:2px;color:var(--accent-2)}
.foot-bottom{margin-top:34px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:12.5px;color:#8891B8}
.footer-legal a{display:inline;padding:0;color:#8891B8}

/* data note strip */
.data-note{background:var(--accent-soft);color:#176872;font-size:12.5px;padding:7px 24px;text-align:center;border-bottom:1px solid var(--line)}
.data-note b{color:var(--ink)}

/* breadcrumb */
.breadcrumb{display:flex;align-items:center;gap:6px;font-size:12.5px;color:var(--steel);margin:18px 0}
.breadcrumb a{color:var(--steel)}
.breadcrumb a:hover{color:var(--ink)}

@media(max-width:860px){
  .menu{display:none}
  .statbar .wrap{flex-wrap:wrap}
  .stat{flex:1 1 50%;border-right:0;border-bottom:1px solid rgba(255,255,255,.12)}
}