:root{
  --bg:#04102c;
  --bg2:#082051;
  --card:rgba(13,40,95,.55);
  --card-solid:#0b2258;
  --card-hover:rgba(20,55,125,.7);
  --border:rgba(110,170,255,.22);
  --border-strong:rgba(126,203,255,.55);
  --text:#eaf3ff;
  --muted:#9db8e8;
  --cyan:#7ecbff;
  --glow:#3fa9ff;
  --grad:linear-gradient(90deg,#7ecbff,#3f7fff);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;color:var(--text);line-height:1.7;
  background:linear-gradient(180deg,#030b20 0%,#04102c 30%,#082051 70%,#0a2a6a 100%);
  background-attachment:fixed;min-height:100vh}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.container{max-width:1180px;margin:0 auto;padding:0 20px}

/* 星空画布 */
#starfield{position:fixed;inset:0;z-index:-1;pointer-events:none}

/* header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(3,12,34,.78);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:#fff}
.logo-mark{width:40px;height:40px;border-radius:10px;background:linear-gradient(135deg,#7ecbff,#2b6bff);display:flex;align-items:center;justify-content:center;color:#04102c;font-size:20px;flex-shrink:0;box-shadow:0 0 20px rgba(126,203,255,.6)}
.logo small{display:block;font-size:10.5px;font-weight:400;color:var(--muted);letter-spacing:1.5px}
nav.main-nav{display:flex;gap:4px}
nav.main-nav a{padding:8px 14px;border-radius:6px;font-size:15px;color:var(--text);transition:.2s;position:relative}
nav.main-nav a::after{content:"";position:absolute;left:50%;bottom:2px;width:0;height:2px;background:var(--grad);transition:.25s;transform:translateX(-50%);border-radius:2px}
nav.main-nav a:hover{color:var(--cyan)}
nav.main-nav a:hover::after{width:60%}
nav.main-nav a.active{color:var(--cyan)}
nav.main-nav a.active::after{width:60%;box-shadow:0 0 8px var(--glow)}
.nav-toggle{display:none;background:none;border:none;font-size:26px;color:var(--cyan);cursor:pointer}

/* hero —— 深空沉浸式（整屏，参考站首屏风格） */
.hero{position:relative;overflow:hidden;color:#fff;min-height:calc(100vh - 72px);display:flex;align-items:center;justify-content:center;padding:80px 0 140px;text-align:center;
  background:radial-gradient(1100px 480px at 50% -10%,rgba(63,127,255,.35),transparent 65%)}
.hero::after{content:"";position:absolute;left:50%;bottom:-320px;transform:translateX(-50%);width:1600px;height:420px;border-radius:50%;
  background:radial-gradient(closest-side,rgba(126,203,255,.55),rgba(43,107,255,.18) 55%,transparent 75%);
  filter:blur(6px)}
.hero::before{content:"";position:absolute;left:50%;bottom:-330px;transform:translateX(-50%);width:1620px;height:430px;border-radius:50%;
  border-top:2px solid rgba(180,225,255,.8);box-shadow:0 -10px 60px rgba(126,203,255,.7)}
.hero h1{font-size:56px;font-weight:800;line-height:1.3;margin-bottom:26px;color:#fff;display:flex;justify-content:center;gap:44px;flex-wrap:wrap;
  background:linear-gradient(180deg,#ffffff 20%,#bfe0ff 55%,#6fa8e8 90%);-webkit-background-clip:text;background-clip:text;color:transparent;
  filter:drop-shadow(0 0 18px rgba(126,203,255,.5)) drop-shadow(0 4px 10px rgba(2,10,30,.8))}
.hero h1 span{letter-spacing:6px}
.hero p{font-size:17px;max-width:760px;margin:0 auto 46px;color:#c6dcff;letter-spacing:3px}
.hero .hero-line{font-size:16px;color:#c6dcff;letter-spacing:2px;margin-bottom:14px}
.hero .hero-line b{color:var(--cyan);font-size:34px;font-weight:800;text-shadow:0 0 18px var(--glow);margin:0 6px}
/* 顶部斜向光束 */
.light-beam{position:absolute;height:2px;border-radius:2px;pointer-events:none;
  background:linear-gradient(90deg,transparent,rgba(126,203,255,.75),rgba(126,203,255,.15));
  transform:rotate(-18deg);filter:blur(.4px);animation:beam 7s ease-in-out infinite}
.beam-1{top:12%;left:-4%;width:420px;animation-delay:0s}
.beam-2{top:6%;right:6%;width:520px;height:3px;transform:rotate(-14deg);animation-delay:2.2s;
  background:linear-gradient(90deg,rgba(126,203,255,.1),rgba(190,225,255,.85),transparent)}
.beam-3{top:24%;right:-6%;width:360px;animation-delay:4.1s}
@keyframes beam{0%,100%{opacity:.25}50%{opacity:.9}}
.hero .btns{display:flex;gap:18px;flex-wrap:wrap;justify-content:center}
.btn{display:inline-block;padding:13px 38px;border-radius:4px;font-size:16px;font-weight:500;transition:.25s;cursor:pointer;border:none;letter-spacing:2px}
.btn-primary{background:transparent;color:#fff;border:1px solid rgba(200,230,255,.75);box-shadow:0 0 18px rgba(126,203,255,.25) inset,0 0 18px rgba(126,203,255,.2)}
.btn-primary:hover{background:rgba(126,203,255,.14);box-shadow:0 0 26px rgba(126,203,255,.5);transform:translateY(-2px)}
.btn-outline{border:1px solid var(--border-strong);color:var(--cyan);background:rgba(126,203,255,.06)}
.btn-outline:hover{background:rgba(126,203,255,.15);transform:translateY(-2px)}
.btn-solid{background:linear-gradient(90deg,#2b6bff,#3fa9ff);color:#fff;box-shadow:0 0 20px rgba(63,127,255,.45)}
.btn-solid:hover{box-shadow:0 0 30px rgba(63,169,255,.7);transform:translateY(-2px)}

/* page hero (subpages) */
.page-hero{position:relative;color:#fff;padding:84px 0 66px;text-align:center;overflow:hidden;border-bottom:1px solid var(--border);
  background:radial-gradient(800px 320px at 50% -20%,rgba(63,127,255,.4),transparent 70%)}
.page-hero h1{font-size:34px;letter-spacing:4px;text-shadow:0 0 20px rgba(126,203,255,.6)}
.page-hero p{color:var(--muted);margin-top:10px;letter-spacing:2px}

/* stats */
.stats{margin-top:-60px;position:relative;z-index:5}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.stat-card{background:rgba(8,28,70,.75);border:1px solid var(--border);border-radius:10px;padding:28px 20px;text-align:center;backdrop-filter:blur(8px);transition:.25s}
.stat-card:hover{border-color:var(--border-strong);box-shadow:0 0 24px rgba(63,127,255,.3)}
.stat-card .num{font-size:36px;font-weight:800;color:var(--cyan);text-shadow:0 0 16px var(--glow)}
.stat-card .num span{font-size:18px}
.stat-card .label{color:var(--muted);font-size:14px;margin-top:6px;letter-spacing:2px}

/* sections */
.section{padding:90px 0}
.section-title{text-align:center;margin-bottom:52px}
.section-title h2{font-size:32px;color:#fff;letter-spacing:6px;text-shadow:0 0 18px rgba(126,203,255,.5);position:relative;display:inline-block}
.section-title h2::before,.section-title h2::after{content:"";position:absolute;top:50%;width:64px;height:1px;background:linear-gradient(90deg,transparent,rgba(126,203,255,.7))}
.section-title h2::before{left:-84px}
.section-title h2::after{right:-84px;transform:scaleX(-1)}
.section-title p{color:var(--muted);margin-top:14px;letter-spacing:3px;font-size:14px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}

.card{background:var(--card);border-radius:8px;padding:34px 28px;border:1px solid var(--border);transition:.3s;position:relative;overflow:hidden;backdrop-filter:blur(6px);text-align:center}
.card::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--grad);transform:scaleX(0);transition:.3s}
.card:hover{transform:translateY(-6px);border-color:var(--border-strong);background:var(--card-hover);box-shadow:0 18px 44px rgba(2,10,30,.6),0 0 24px rgba(63,127,255,.25)}
.card:hover::after{transform:scaleX(1)}
.card .icon{width:64px;height:64px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:radial-gradient(circle at 35% 30%,rgba(126,203,255,.28),rgba(43,107,255,.1));border:1px solid var(--border-strong);color:var(--cyan);margin:0 auto 20px;padding:15px;box-shadow:0 0 18px rgba(63,169,255,.35)}
.card .icon svg{width:100%;height:100%}
.card h3{font-size:19px;margin-bottom:12px;color:#fff;letter-spacing:1px}
.card p{color:var(--muted);font-size:14.5px;text-align:left}

/* news list */
.news-item{display:flex;gap:18px;background:var(--card);border:1px solid var(--border);border-radius:8px;padding:22px 26px;margin-bottom:14px;transition:.25s;backdrop-filter:blur(6px)}
.news-item:hover{border-color:var(--border-strong);background:var(--card-hover);transform:translateX(6px)}
.news-date{flex-shrink:0;width:76px;text-align:center;background:rgba(126,203,255,.08);border:1px solid var(--border);border-radius:8px;padding:9px 4px;height:fit-content}
.news-date .d{font-size:23px;font-weight:800;color:var(--cyan);text-shadow:0 0 10px var(--glow)}
.news-date .ym{font-size:12px;color:var(--muted)}
.news-item h3{font-size:17px;margin-bottom:6px;color:#fff}
.news-item p{color:var(--muted);font-size:14px}
.tag{display:inline-block;font-size:12px;padding:2px 12px;border-radius:2px;background:rgba(126,203,255,.12);color:var(--cyan);border:1px solid rgba(126,203,255,.35);margin-right:8px;letter-spacing:1px}
.tag.orange{background:rgba(255,190,92,.1);color:#ffbe5c;border-color:rgba(255,190,92,.35)}
.tag.purple{background:rgba(178,148,255,.1);color:#b294ff;border-color:rgba(178,148,255,.35)}
.tag.green{background:rgba(94,234,178,.1);color:#5eeab2;border-color:rgba(94,234,178,.35)}

/* activity cards */
.act-card{background:var(--card);border-radius:8px;overflow:hidden;border:1px solid var(--border);transition:.3s;display:flex;flex-direction:column;backdrop-filter:blur(6px)}
.act-card:hover{transform:translateY(-6px);border-color:var(--border-strong);box-shadow:0 18px 44px rgba(2,10,30,.6),0 0 24px rgba(63,127,255,.25)}
.act-cover{height:155px;display:flex;align-items:center;justify-content:center;color:#fff;position:relative;overflow:hidden}
.act-cover::before{content:"";position:absolute;inset:0;
  background:radial-gradient(360px 130px at 50% 115%,rgba(255,255,255,.28),transparent 70%),
  linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:auto,28px 28px,28px 28px}
.act-cover svg{width:62px;height:62px;position:relative;filter:drop-shadow(0 0 12px rgba(255,255,255,.6))}
.cover-1{background:linear-gradient(150deg,#0a2a6a,#1668dc)}
.cover-2{background:linear-gradient(150deg,#161a63,#5b4bff)}
.cover-3{background:linear-gradient(150deg,#0a3d62,#00a8cc)}
.cover-4{background:linear-gradient(150deg,#063a4f,#0aa87e)}
.cover-5{background:linear-gradient(150deg,#101c56,#3f6cff)}
.cover-6{background:linear-gradient(150deg,#2a1a5e,#7b4bff)}
.act-body{padding:22px 24px;flex:1;display:flex;flex-direction:column}
.act-body h3{font-size:17px;margin-bottom:8px;color:#fff}
.act-body p{color:var(--muted);font-size:14px;flex:1}
.act-meta{margin-top:14px;font-size:13px;color:var(--muted);display:flex;justify-content:space-between;align-items:center}
.status{font-size:12px;padding:3px 12px;border-radius:2px;font-weight:600;border:1px solid transparent;letter-spacing:1px}
.status.open{background:rgba(94,234,178,.1);color:#5eeab2;border-color:rgba(94,234,178,.4)}
.status.soon{background:rgba(255,190,92,.1);color:#ffbe5c;border-color:rgba(255,190,92,.4)}
.status.done{background:rgba(157,184,232,.1);color:#9db8e8;border-color:rgba(157,184,232,.35)}

/* timeline (vision) */
.timeline{position:relative;margin:20px 0;padding-left:30px;border-left:1px solid rgba(126,203,255,.4)}
.timeline-item{position:relative;margin-bottom:30px}
.timeline-item::before{content:"";position:absolute;left:-37px;top:8px;width:13px;height:13px;border-radius:50%;background:var(--cyan);box-shadow:0 0 14px var(--glow),0 0 4px #fff}
.timeline-item h3{color:var(--cyan);font-size:18px;margin-bottom:6px;letter-spacing:1px;text-shadow:0 0 12px rgba(63,169,255,.4)}
.timeline-item p{color:var(--muted);font-size:14.5px}

/* partners */
.partner-box{background:var(--card);border:1px solid var(--border);border-radius:8px;padding:30px 18px;text-align:center;transition:.25s;backdrop-filter:blur(6px)}
.partner-box:hover{border-color:var(--border-strong);background:var(--card-hover);transform:translateY(-4px);box-shadow:0 0 22px rgba(63,127,255,.25)}
.partner-box .p-icon{width:52px;height:52px;margin:0 auto 14px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:radial-gradient(circle at 35% 30%,rgba(126,203,255,.25),rgba(43,107,255,.08));border:1px solid var(--border-strong);color:var(--cyan);padding:12px;box-shadow:0 0 14px rgba(63,169,255,.3)}
.partner-box .p-icon svg{width:100%;height:100%}
.partner-box h4{font-size:15px;color:#fff;letter-spacing:1px}
.partner-box p{font-size:12.5px;color:var(--muted);margin-top:5px}

/* contact */
.contact-info li{list-style:none;display:flex;gap:14px;margin-bottom:18px;align-items:flex-start;color:var(--muted)}
.contact-info li strong{color:#fff;letter-spacing:1px}
.contact-info .ci{width:40px;height:40px;flex-shrink:0;border-radius:50%;display:flex;align-items:center;justify-content:center;background:radial-gradient(circle at 35% 30%,rgba(126,203,255,.25),rgba(43,107,255,.08));border:1px solid var(--border-strong);color:var(--cyan);padding:9px;box-shadow:0 0 12px rgba(63,169,255,.3)}
.contact-info .ci svg{width:100%;height:100%}
.form-group{margin-bottom:16px}
.form-group label{display:block;font-size:14px;margin-bottom:6px;color:var(--text);letter-spacing:1px}
.form-group input,.form-group textarea,.form-group select{width:100%;padding:11px 14px;border:1px solid var(--border);border-radius:4px;font-size:14.5px;font-family:inherit;background:rgba(4,16,44,.6);color:var(--text)}
.form-group input::placeholder,.form-group textarea::placeholder{color:#5f7bb0}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 14px rgba(126,203,255,.3)}
.form-note{font-size:13px;color:var(--muted);margin-top:10px}
form.card{text-align:left}

/* misc */
.rich p{margin-bottom:14px;color:#c6dcff;font-size:15.5px}
.rich h3{color:var(--cyan);margin:26px 0 12px;font-size:20px;letter-spacing:2px}
.notice-list li{list-style:none;padding:15px 20px;background:var(--card);border:1px solid var(--border);border-radius:6px;margin-bottom:10px;display:flex;justify-content:space-between;gap:14px;align-items:center;transition:.25s;backdrop-filter:blur(6px)}
.notice-list li:hover{border-color:var(--border-strong);transform:translateX(6px)}
.notice-list li>span:first-child{display:flex;align-items:center;gap:10px}
.notice-list .li-icon{width:20px;height:20px;flex-shrink:0;color:var(--cyan);display:inline-flex}
.notice-list .li-icon svg{width:100%;height:100%}
.notice-list li span.date{color:var(--muted);font-size:13px;flex-shrink:0}
.section.alt{background:rgba(3,12,34,.45);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}

/* footer */
.site-footer{background:rgba(2,8,24,.85);color:var(--muted);padding:52px 0 24px;margin-top:60px;border-top:1px solid var(--border);position:relative;overflow:hidden}
.site-footer::before{content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);width:70%;height:1px;background:linear-gradient(90deg,transparent,rgba(126,203,255,.8),transparent)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.4fr;gap:32px;margin-bottom:32px}
.site-footer h4{color:#fff;font-size:16px;margin-bottom:14px;letter-spacing:2px}
.site-footer a{display:block;font-size:14px;margin-bottom:8px;opacity:.85}
.site-footer a:hover{opacity:1;color:var(--cyan)}
.site-footer p{font-size:14px;opacity:.85}
.footer-bottom{border-top:1px solid var(--border);padding-top:18px;text-align:center;font-size:13px;opacity:.7;letter-spacing:1px}

/* responsive */
@media (max-width:900px){
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .hero h1{font-size:32px}
  .section-title h2::before,.section-title h2::after{display:none}
  nav.main-nav{display:none;position:absolute;top:72px;left:0;right:0;background:rgba(3,12,34,.97);flex-direction:column;padding:12px 20px;border-bottom:1px solid var(--border);box-shadow:0 12px 24px rgba(0,0,0,.5)}
  nav.main-nav.open{display:flex}
  .nav-toggle{display:block}
}
@media (max-width:600px){
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .hero{padding:80px 0 110px}
  .hero h1{font-size:26px}
}