/* TCT Group – tctza.com. Plain CSS, no build step. */
:root{
  --ink:#16202a; --muted:#5b6876; --line:#e3e8ee; --bg:#ffffff; --soft:#f5f7fa;
  --brand:#1e5b8c; --brand-dark:#123f63; --accent:#e8892b;
  --radius:14px; --shadow:0 6px 24px rgba(16,32,48,.08);
  --max:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;font-size:17px}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand)}
a:hover{color:var(--brand-dark)}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px}.skip:focus{left:10px;top:10px;background:#fff;padding:8px;z-index:99}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:saturate(1.4) blur(6px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;min-height:68px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:700;letter-spacing:.2px}
.brand img{height:44px;width:auto}
.brand small{display:block;font-weight:500;color:var(--muted);font-size:12px;letter-spacing:0}
.nav ul{list-style:none;margin:0;padding:0;display:flex;gap:4px;flex-wrap:wrap}
.nav a{display:block;padding:8px 12px;border-radius:8px;text-decoration:none;color:var(--ink);font-size:15px;font-weight:500}
.nav a:hover,.nav a[aria-current="page"]{background:var(--soft);color:var(--brand-dark)}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:8px;padding:8px 10px;font-size:15px;cursor:pointer}
@media (max-width:860px){
  .nav-toggle{display:block}
  .nav{position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--line);display:none}
  .nav.open{display:block}
  .nav ul{flex-direction:column;padding:8px 20px 16px}
}

/* hero */
.hero{background:linear-gradient(135deg,#123f63 0%,#1e5b8c 55%,#2f7bb5 100%);color:#fff;padding:72px 0 64px}
.hero h1{font-size:clamp(30px,4.6vw,48px);line-height:1.15;margin:0 0 14px}
.hero p{font-size:clamp(17px,2vw,20px);max-width:720px;opacity:.95;margin:0 0 26px}
.hero .eyebrow{text-transform:uppercase;letter-spacing:2px;font-size:13px;opacity:.85;margin-bottom:10px}
.btn{display:inline-block;padding:12px 20px;border-radius:10px;background:var(--accent);color:#fff;text-decoration:none;font-weight:600}
.btn:hover{background:#cf7419;color:#fff}
.btn.ghost{background:transparent;border:1.5px solid rgba(255,255,255,.7);margin-left:8px}
.btn.ghost:hover{background:rgba(255,255,255,.12)}
.page-hero{background:var(--soft);border-bottom:1px solid var(--line);padding:44px 0 36px}
.page-hero h1{margin:0 0 8px;font-size:clamp(28px,4vw,40px);line-height:1.2}
.page-hero p{margin:0;color:var(--muted);max-width:760px}

/* sections */
section{padding:56px 0}
section.alt{background:var(--soft)}
h2{font-size:clamp(24px,3vw,32px);line-height:1.25;margin:0 0 10px}
h3{font-size:21px;margin:0 0 6px;line-height:1.3}
.lead{color:var(--muted);max-width:760px;margin:0 0 30px}
.grid{display:grid;gap:22px}
.grid.c2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.grid.c3{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);display:flex;flex-direction:column}
.card .logo{height:96px;display:flex;align-items:center;margin-bottom:14px}
.card .logo img{max-height:96px;width:auto;max-width:100%}
.card p{margin:0 0 12px}
.card .more{margin-top:auto;font-weight:600;text-decoration:none}
.tag{display:inline-block;font-size:12px;font-weight:600;letter-spacing:.4px;text-transform:uppercase;color:var(--brand-dark);background:#e6eff7;border-radius:999px;padding:3px 10px;margin-bottom:10px}
.tag.orange{background:#fdeedd;color:#9a4d00}

/* entity blocks */
.entity{display:grid;grid-template-columns:260px 1fr;gap:36px;align-items:start;padding:40px 0;border-top:1px solid var(--line)}
.entity:first-of-type{border-top:0}
.entity .logo-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px;display:flex;align-items:center;justify-content:center;min-height:180px}
.entity .logo-box img{max-height:200px;width:auto}
.wordmark{font-weight:800;font-size:28px;white-space:nowrap;letter-spacing:1px;color:#f71804;text-align:center;line-height:1.1}
.wordmark small{display:block;font-size:12px;letter-spacing:.5px;color:var(--muted);font-weight:500;margin-top:8px}
@media (max-width:760px){.entity{grid-template-columns:1fr;gap:18px}.entity .logo-box{min-height:140px}}
dl.facts{display:grid;grid-template-columns:max-content 1fr;gap:6px 18px;margin:16px 0;font-size:15.5px}
dl.facts dt{color:var(--muted)}
dl.facts dd{margin:0;font-weight:500}
@media (max-width:520px){dl.facts{grid-template-columns:1fr}dl.facts dd{margin-bottom:6px}}
ul.ticks{padding-left:20px;margin:8px 0 14px}
ul.ticks li{margin:4px 0}
.photo{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line)}
.caption{font-size:13px;color:var(--muted);margin-top:6px}

/* structure diagram */
.structure{display:grid;gap:14px}
.structure .row{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
.node{background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px 16px;text-align:center;box-shadow:var(--shadow);min-width:200px;font-size:15px}
.node strong{display:block}
.node span{color:var(--muted);font-size:13px}
.node.main{border:2px solid var(--brand)}
.row-label{text-align:center;font-size:12px;text-transform:uppercase;letter-spacing:1.5px;color:var(--muted);margin-top:8px}

/* people */
.person{display:flex;gap:18px;align-items:flex-start}
.avatar{flex:0 0 72px;height:72px;border-radius:50%;background:#e6eff7;color:var(--brand-dark);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:24px}

/* contact */
.contact-list{list-style:none;padding:0;margin:0}
.contact-list li{padding:10px 0;border-bottom:1px solid var(--line)}
.contact-list li span{display:block;font-size:13px;color:var(--muted)}

/* placeholders – must be replaced before launch */
.ph{background:#fff4d6;color:#7a5600;border:1px dashed #e0b84d;border-radius:4px;padding:0 4px;font-style:italic}

/* footer */
.site-footer{background:#0f2233;color:#c9d4de;padding:40px 0 28px;font-size:15px}
.site-footer a{color:#fff}
.site-footer .cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:24px}
.site-footer h4{color:#fff;margin:0 0 8px;font-size:15px}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li{margin:4px 0}
.site-footer .legal{border-top:1px solid #23394d;margin-top:26px;padding-top:16px;font-size:13px;color:#8fa3b5}
.wordmark.qq{color:#fc5901;letter-spacing:.02em}
.wordmark.qq small{display:block;font-size:12px;font-weight:400;margin-top:6px;letter-spacing:0}