/* 链接中国 引领世界 — core styles */
:root{
  --bg:#07080d;
  --bg2:#0c0f18;
  --ink:#eef1f7;
  --muted:#9aa3b8;
  --red:#ff2e3e;
  --red2:#ff5a3c;
  --gold:#ffd15c;
  --cyan:#4de3ff;
  --line:rgba(255,255,255,.09);
  --card:rgba(255,255,255,.035);
  --maxw:1180px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  color:var(--ink);
  background:radial-gradient(1200px 700px at 80% -10%,rgba(255,46,62,.18),transparent 60%),
             radial-gradient(900px 600px at 10% 10%,rgba(77,227,255,.10),transparent 55%),
             linear-gradient(180deg,var(--bg),var(--bg2));
  min-height:100vh;
  overflow-x:hidden;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%}

/* canvas bg + cursor */
#stars{position:fixed;inset:0;z-index:0;pointer-events:none;display:block}
#glow{position:fixed;width:280px;height:280px;left:0;top:0;margin:-140px 0 0 -140px;border-radius:50%;
  pointer-events:none;z-index:1;mix-blend-mode:screen;transition:opacity .3s;opacity:.0;
  background:radial-gradient(circle,rgba(255,90,60,.22),rgba(255,209,92,.10) 40%,transparent 68%)}
#cursor{position:fixed;width:40px;height:40px;left:0;top:0;margin:-20px 0 0 -20px;border:2px solid rgba(255,209,92,.9);
  border-radius:50%;pointer-events:none;z-index:60;transition:opacity .3s;opacity:0;
  box-shadow:0 0 18px rgba(255,90,60,.5)}
@media (hover:hover){body:hover #glow{opacity:1}body:hover #cursor{opacity:1}}
.wrap{position:relative;z-index:5}

/* nav */
header.nav{position:sticky;top:0;z-index:40;backdrop-filter:blur(14px);
  background:linear-gradient(180deg,rgba(7,8,13,.86),rgba(7,8,13,.45));
  border-bottom:1px solid var(--line)}
.nav-in{max-width:var(--maxw);margin:0 auto;padding:14px 22px;display:flex;align-items:center;gap:20px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:.5px}
.brand .dot{width:12px;height:12px;border-radius:50%;background:conic-gradient(from 0deg,var(--red),var(--gold),var(--cyan),var(--red));
  box-shadow:0 0 14px rgba(255,90,60,.8);animation:spin 6s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.brand b{font-size:16px}
.brand span{font-size:11px;color:var(--muted);font-weight:500;letter-spacing:2px}
nav.links{margin-left:auto;display:flex;gap:6px;flex-wrap:wrap}
nav.links a{padding:8px 13px;border-radius:999px;font-size:14px;color:#cdd4e6;border:1px solid transparent;transition:.25s}
nav.links a:hover{color:#fff;border-color:var(--line);background:rgba(255,255,255,.05)}
nav.links a.cta{background:linear-gradient(135deg,var(--red),var(--red2));color:#fff;box-shadow:0 6px 22px rgba(255,46,62,.35)}

/* hero */
.hero{max-width:var(--maxw);margin:0 auto;padding:clamp(60px,11vh,130px) 22px clamp(40px,7vh,80px);text-align:center}
.tag{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:#d7ddf0;padding:7px 15px;border:1px solid var(--line);
  border-radius:999px;background:rgba(255,255,255,.04);margin-bottom:26px}
.tag i{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 12px var(--cyan);animation:pulse 1.8s infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.35;transform:scale(.7)}}
h1.big{font-size:clamp(42px,8.4vw,104px);line-height:1.02;margin:0 0 20px;font-weight:900;letter-spacing:-1px}
.grad{background:linear-gradient(100deg,var(--gold) 5%,var(--red2) 38%,var(--red) 58%,var(--cyan) 96%);
  -webkit-background-clip:text;background-clip:text;color:transparent;background-size:220% auto;animation:flow 7s linear infinite;
  filter:drop-shadow(0 6px 26px rgba(255,46,62,.28))}
@keyframes flow{to{background-position:220% center}}
.sub{font-size:clamp(15px,2.1vw,20px);color:#c3cade;max-width:760px;margin:0 auto 34px}
.btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn{padding:14px 26px;border-radius:14px;font-weight:700;font-size:15px;border:1px solid var(--line);
  background:rgba(255,255,255,.05);transition:.28s;display:inline-flex;align-items:center;gap:9px}
.btn:hover{transform:translateY(-3px);border-color:rgba(255,209,92,.5);box-shadow:0 14px 34px rgba(0,0,0,.45)}
.btn.primary{background:linear-gradient(135deg,var(--red),var(--red2));color:#fff;border-color:transparent;
  box-shadow:0 12px 34px rgba(255,46,62,.4)}
.btn.primary:hover{box-shadow:0 18px 44px rgba(255,46,62,.55)}

/* sections */
section.blk{max-width:var(--maxw);margin:0 auto;padding:clamp(48px,8vh,92px) 22px}
.kicker{color:var(--gold);font-size:13px;letter-spacing:4px;font-weight:700;margin-bottom:12px;text-transform:uppercase}
h2.title{font-size:clamp(28px,4.4vw,46px);margin:0 0 16px;font-weight:850;letter-spacing:-.5px}
.lead{color:var(--muted);max-width:720px;font-size:16px;margin:0 0 34px}

/* cards / subsites */
.grid{display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(270px,1fr))}
.card{position:relative;padding:26px;border-radius:20px;border:1px solid var(--line);background:var(--card);
  overflow:hidden;transition:.35s;text-align:left}
.card::after{content:"";position:absolute;inset:0;border-radius:20px;padding:1px;
  background:linear-gradient(135deg,rgba(255,209,92,.6),transparent 40%,rgba(77,227,255,.5));
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;
  opacity:0;transition:.35s}
.card:hover{transform:translateY(-6px);background:rgba(255,255,255,.06)}
.card:hover::after{opacity:1}
.card .ico{font-size:26px;margin-bottom:14px}
.card h3{margin:0 0 8px;font-size:20px}
.card p{margin:0;color:var(--muted);font-size:14.5px}
.card .more{margin-top:16px;color:var(--gold);font-size:13.5px;font-weight:700}

/* stats */
.stats{display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(180px,1fr))}
.stat{padding:24px;border-radius:18px;border:1px solid var(--line);background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.01));text-align:center}
.stat .num{font-size:clamp(30px,5vw,48px);font-weight:900;background:linear-gradient(120deg,var(--gold),var(--red2));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.stat .lbl{color:var(--muted);font-size:13.5px;margin-top:6px;letter-spacing:1px}

/* marquee */
.marq{overflow:hidden;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:16px 0;margin-top:8px}
.marq .row{display:flex;gap:40px;white-space:nowrap;animation:slide 26s linear infinite;color:#8f98ad;font-weight:700;letter-spacing:2px}
@keyframes slide{to{transform:translateX(-50%)}}

/* contact */
.contact{border-radius:24px;border:1px solid var(--line);padding:clamp(28px,5vw,52px);
  background:radial-gradient(700px 300px at 80% 0%,rgba(255,46,62,.16),transparent 60%),
             radial-gradient(600px 300px at 0% 100%,rgba(77,227,255,.12),transparent 60%),
             rgba(255,255,255,.03);text-align:center}
.mail{display:inline-block;margin-top:8px;font-size:clamp(20px,4vw,34px);font-weight:900;
  background:linear-gradient(120deg,var(--gold),var(--red2),var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent;word-break:break-all}

footer{max-width:var(--maxw);margin:0 auto;padding:38px 22px;color:#6b7488;font-size:13px;
  display:flex;gap:14px;flex-wrap:wrap;align-items:center;border-top:1px solid var(--line)}
footer .sp{margin-left:auto}

/* reveal */
.rv{opacity:0;transform:translateY(26px);transition:opacity .8s cubic-bezier(.2,.7,.2,1),transform .8s cubic-bezier(.2,.7,.2,1)}
.rv.in{opacity:1;transform:none}

/* sub page header */
.page-head{padding:clamp(46px,9vh,110px) 22px clamp(20px,4vh,44px);max-width:var(--maxw);margin:0 auto}
.crumb{font-size:13px;color:var(--muted);margin-bottom:14px}
.crumb a:hover{color:var(--gold)}
.page-head h1{font-size:clamp(32px,6vw,66px);margin:0 0 14px;font-weight:900;letter-spacing:-1px}

/* timeline */
.tl{border-left:2px solid var(--line);padding-left:24px;margin-left:8px}
.tl .item{margin-bottom:26px;position:relative}
.tl .item::before{content:"";position:absolute;left:-32px;top:6px;width:12px;height:12px;border-radius:50%;
  background:var(--red2);box-shadow:0 0 12px var(--red2)}
.tl h4{margin:0 0 4px;font-size:17px}
.tl p{margin:0;color:var(--muted);font-size:14.5px}
.bars{display:grid;gap:14px}
.bar{background:rgba(255,255,255,.05);border-radius:12px;height:34px;position:relative;overflow:hidden;border:1px solid var(--line)}
.bar span{position:absolute;inset:0;width:0;background:linear-gradient(90deg,var(--red),var(--gold));
  border-radius:12px;transition:width 1.4s cubic-bezier(.2,.7,.2,1)}
.bar em{position:absolute;left:14px;top:7px;font-style:normal;font-size:13px;font-weight:700;z-index:2}
@media (max-width:640px){nav.links a{padding:7px 10px;font-size:13px}.brand span{display:none}}