:root{--primary:#1a3a6b;--dark:#12294e;--accent:#f39c12;--text:#2c3e50;--muted:#7f8c9b;--bg:#f7f9fc;--radius:12px;--shadow:0 6px 24px rgba(20,40,80,.08);--shadow-hover:0 14px 34px rgba(20,40,80,.16)}
*{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);background:var(--bg);line-height:1.75}
a{text-decoration:none;color:inherit}img{max-width:100%}
.container{max-width:1120px;margin:0 auto;padding:0 22px}
/* nav */
header{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);box-shadow:0 1px 12px rgba(0,0,0,.06)}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px}
.logo{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:700;color:var(--dark)}
.logo-badge{width:34px;height:34px;border-radius:8px;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center}
.logo small{font-size:12px;color:var(--muted);font-weight:400;display:block;line-height:1.2}
.nav-links{display:flex;gap:28px;list-style:none;align-items:center}
.nav-links a{font-size:14.5px;color:var(--text);transition:color .2s}
.nav-links a:hover{color:var(--accent)}
.nav-cta{background:var(--accent);color:#fff!important;padding:8px 18px;border-radius:20px;font-weight:600}
.menu-btn{display:none;background:none;border:none;font-size:22px;color:var(--dark);cursor:pointer}
/* hero */
.hero{margin-top:66px;color:#fff;padding:96px 0 110px;position:relative;overflow:hidden;background:linear-gradient(135deg,var(--dark) 0%,var(--primary) 60%,var(--primary) 100%)}
.hero::before{content:"";position:absolute;right:-140px;top:-140px;width:460px;height:460px;border-radius:50%;background:radial-gradient(circle,color-mix(in srgb,var(--accent) 30%,transparent),transparent 70%)}
.hero::after{content:"";position:absolute;left:-90px;bottom:-170px;width:380px;height:380px;border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.09),transparent 70%)}
.hero-inner{position:relative;z-index:1;max-width:680px}
.hero-tag{display:inline-block;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.3);padding:5px 15px;border-radius:20px;font-size:13px;margin-bottom:20px;letter-spacing:2px}
.hero h1{font-size:42px;line-height:1.3;margin-bottom:16px}
.hero h1 em{color:var(--accent);font-style:normal}
.hero p{font-size:16.5px;opacity:.9;margin-bottom:30px;max-width:560px}
.hero-icon{position:absolute;right:6%;top:50%;transform:translateY(-50%);font-size:150px;opacity:.18;z-index:0}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 28px;border-radius:26px;font-size:15px;font-weight:600;transition:all .2s;cursor:pointer;border:none}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px)}
.btn-ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.6)}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
/* stats */
.stats{background:#fff;box-shadow:var(--shadow);border-radius:var(--radius);margin-top:-56px;position:relative;z-index:2;display:grid;grid-template-columns:repeat(4,1fr);padding:24px 0}
.stat{text-align:center;border-right:1px solid #eef1f5}
.stat:last-child{border-right:none}
.stat b{display:block;font-size:24px;color:var(--primary)}
.stat span{font-size:13px;color:var(--muted)}
/* section */
section{padding:76px 0}
.section-head{text-align:center;margin-bottom:46px}
.kicker{display:inline-block;color:var(--accent);font-size:13.5px;font-weight:700;letter-spacing:3px;margin-bottom:8px}
.section-head h2{font-size:30px;color:var(--dark);margin-bottom:10px}
.section-head p{color:var(--muted);max-width:560px;margin:0 auto;font-size:15px}
/* cards */
.grid{display:grid;gap:24px}
.g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border-radius:var(--radius);padding:30px 26px;border:1px solid #eef1f5;transition:all .25s}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.card .icon{width:52px;height:52px;border-radius:12px;margin-bottom:16px;display:flex;align-items:center;justify-content:center;font-size:25px;background:color-mix(in srgb,var(--primary) 10%,#fff)}
.card h3{font-size:18px;color:var(--dark);margin-bottom:8px}
.card p{font-size:14px;color:var(--muted)}
/* case */
.case-card{background:#fff;border-radius:var(--radius);overflow:hidden;border:1px solid #eef1f5;transition:all .25s}
.case-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.case-thumb{height:170px;display:flex;align-items:center;justify-content:center;font-size:56px;background:linear-gradient(135deg,var(--primary),var(--dark))}
.case-body{padding:20px 22px}
.case-body h3{font-size:16.5px;color:var(--dark);margin-bottom:6px}
.case-body p{font-size:13.5px;color:var(--muted)}
/* news */
.news-card{background:#fff;border-radius:var(--radius);overflow:hidden;border:1px solid #eef1f5;display:flex;flex-direction:column;transition:all .25s}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.news-body{padding:18px 20px;flex:1;display:flex;flex-direction:column}
.news-body h3{font-size:16px;color:var(--dark);margin-bottom:8px;line-height:1.5}
.news-body p{font-size:13.5px;color:var(--muted);flex:1;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{margin-top:12px;font-size:12.5px;color:var(--accent);font-weight:600}
/* about */
.about{background:#fff}
.about-wrap{display:grid;grid-template-columns:1.2fr .8fr;gap:44px;align-items:center}
.about h3{font-size:24px;color:var(--dark);margin-bottom:14px}
.about p{color:var(--muted);font-size:15px;margin-bottom:10px}
.about-panel{background:linear-gradient(135deg,var(--primary),var(--dark));color:#fff;border-radius:var(--radius);padding:34px;text-align:center}
.about-panel .big{font-size:44px}
.about-panel b{display:block;font-size:20px;margin-top:10px}
.about-panel span{font-size:13px;opacity:.85}
/* contact */
.contact{background:var(--dark);color:#fff}
.contact .section-head h2{color:#fff}
.contact .section-head p{color:rgba(255,255,255,.7)}
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.contact-item{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);padding:26px;text-align:center}
.contact-item .ci-icon{font-size:30px;margin-bottom:10px}
.contact-item b{display:block;font-size:16px;margin-bottom:6px}
.contact-item span{font-size:14px;opacity:.85;word-break:break-all}
/* footer */
footer{background:#141c28;color:rgba(255,255,255,.65);padding:44px 0 26px;font-size:13.5px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:36px;margin-bottom:30px}
.footer-grid h4{color:#fff;font-size:15px;margin-bottom:12px}
.footer-links{list-style:none}
.footer-links li{margin-bottom:8px}
.footer-links a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:18px;text-align:center;font-size:12.5px}
/* news list / article */
.page-head{margin-top:66px;background:linear-gradient(135deg,var(--dark),var(--primary));color:#fff;text-align:center;padding:64px 0}
.page-head h1{font-size:32px;margin-bottom:8px}
.page-head p{opacity:.85;font-size:15px}
.news-list{display:flex;flex-direction:column;gap:18px;max-width:820px;margin:0 auto}
.news-item{background:#fff;border:1px solid #eef1f5;border-radius:var(--radius);padding:24px 28px;transition:all .2s;cursor:pointer}
.news-item:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.news-item h3{font-size:18px;color:var(--dark);margin-bottom:8px}
.news-item p{font-size:14px;color:var(--muted)}
.news-item .meta{margin-top:10px;font-size:13px;color:var(--accent);font-weight:600}
.load-more{display:block;margin:26px auto 0;background:var(--primary);color:#fff;border:none;padding:11px 34px;border-radius:24px;font-size:14px;cursor:pointer}
.load-more:disabled{opacity:.4;cursor:default}
.article-wrap{max-width:820px;margin:0 auto;background:#fff;border:1px solid #eef1f5;border-radius:var(--radius);padding:44px 48px}
.article-wrap h1{font-size:27px;color:var(--dark);line-height:1.45;margin-bottom:14px}
.article-meta{font-size:13px;color:var(--muted);padding-bottom:18px;border-bottom:1px solid #eef1f5;margin-bottom:24px}
.article-content{font-size:15.5px;color:var(--text)}
.article-content p{margin-bottom:14px}
.article-content img{border-radius:8px;margin:10px 0}
.back-link{display:inline-block;margin-top:26px;color:var(--primary);font-weight:600}
.empty-tip{text-align:center;color:var(--muted);padding:50px 0}
/* portal */
.portal-hero{margin-top:66px;background:linear-gradient(135deg,#101d33,#1a3a6b 55%,#2e5aa8);color:#fff;padding:104px 0 120px;text-align:center;position:relative;overflow:hidden}
.portal-hero::before{content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(243,156,18,.28),transparent 70%)}
.portal-hero h1{font-size:44px;margin-bottom:16px}
.portal-hero h1 em{color:#f39c12;font-style:normal}
.portal-hero p{font-size:17px;opacity:.88;max-width:640px;margin:0 auto 30px}
.sites-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.site-card{border-radius:var(--radius);overflow:hidden;background:#fff;border:1px solid #eef1f5;transition:all .25s;display:block}
.site-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.site-card .sc-top{height:120px;display:flex;align-items:center;justify-content:center;font-size:52px;color:#fff}
.site-card .sc-body{padding:20px 22px}
.site-card h3{font-size:18px;color:var(--dark);margin-bottom:6px}
.site-card p{font-size:13.5px;color:var(--muted)}
.site-card .sc-go{margin-top:12px;font-size:13px;font-weight:700}
/* responsive */
@media(max-width:900px){
.hero h1{font-size:31px}.hero-icon{display:none}
.stats{grid-template-columns:repeat(2,1fr)}.stat:nth-child(2){border-right:none}
.g4{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(2,1fr)}.g2{grid-template-columns:1fr}
.about-wrap{grid-template-columns:1fr}.contact-grid{grid-template-columns:1fr}
.footer-grid{grid-template-columns:1fr;gap:22px}
.sites-grid{grid-template-columns:repeat(2,1fr)}
.menu-btn{display:block}
.nav-links{display:none;position:absolute;top:66px;left:0;right:0;background:#fff;flex-direction:column;padding:18px 24px;gap:14px;box-shadow:0 10px 24px rgba(0,0,0,.1)}
.nav-links.open{display:flex}
}
@media(max-width:560px){
.g3,.g4,.sites-grid{grid-template-columns:1fr}
.hero{padding:70px 0 84px}.hero h1{font-size:26px}
section{padding:56px 0}
.article-wrap{padding:28px 22px}
}