:root{--primary:#003A70;--primary-dark:#00294F;--accent:#C8A44A;--steel:#7A8B99;--light:#F5F7F9;--dark:#10202F;--text:#2B3440;--muted:#6B7683;--font:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--text);background:#fff;line-height:1.7;overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
ul{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px}

/* Top utility bar */
.topbar{background:var(--primary-dark);color:rgba(255,255,255,.8);font-size:12px;position:relative;z-index:1001}
.topbar .container{display:flex;justify-content:space-between;align-items:center;height:34px}
.topbar a{color:rgba(255,255,255,.8);margin-left:14px;transition:color .2s}
.topbar a:hover{color:#fff}
.topbar .sep{color:rgba(255,255,255,.2);margin-left:14px}

/* Header */
.header{position:sticky;top:0;left:0;width:100%;z-index:1000;background:#fff;box-shadow:0 2px 24px rgba(0,0,0,.12)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px}
.logo img{height:36px}
.logo-text{color:var(--primary);font-size:20px;font-weight:700;letter-spacing:2px}
.logo-sub{font-size:9px;letter-spacing:2px;color:var(--steel);text-transform:uppercase}
.nav{display:flex}
.nav>li{position:relative}
.nav>li>a{display:flex;align-items:center;height:64px;padding:0 18px;color:var(--text);font-size:14px;letter-spacing:1px;transition:color .3s;position:relative}
.nav>li>a::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:0;height:3px;background:var(--accent);transition:width .3s}
.nav>li:hover>a,.nav>li>a.active{color:var(--primary)}
.nav>li:hover>a::after,.nav>li>a.active::after{width:100%}
.dropdown{position:absolute;top:100%;left:0;min-width:200px;background:#fff;box-shadow:0 12px 40px rgba(0,0,0,.15);opacity:0;visibility:hidden;transform:translateY(12px);transition:all .3s;z-index:100;padding:10px 0}
.nav>li:hover .dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown a{display:block;padding:9px 24px;font-size:13px;color:var(--text);border-left:3px solid transparent;transition:all .25s}
.dropdown a:hover{color:var(--primary);border-left-color:var(--accent);background:var(--light)}
.menu-toggle{display:none;background:none;border:none;cursor:pointer}
.menu-toggle span{display:block;width:24px;height:2px;background:var(--text);margin:5px 0;transition:.3s;border-radius:2px}

/* Page banner */
.page-banner{position:relative;height:260px;display:flex;align-items:flex-end;overflow:hidden;background:var(--primary)}
.page-banner::before{content:'';position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(180deg,rgba(5,18,32,.2) 0%,rgba(5,18,32,.85) 100%)}
.page-banner .banner-bg{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;opacity:.4}
.page-banner .banner-content{position:relative;z-index:2;padding-bottom:34px;color:#fff}
.page-banner .crumb{font-size:12px;color:rgba(255,255,255,.6);margin-bottom:14px}
.page-banner .crumb a{color:rgba(255,255,255,.7)}
.page-banner .crumb a:hover{color:var(--accent)}
.page-banner .crumb .arrow{margin:0 8px}
.page-banner h1{font-size:38px;font-weight:800;letter-spacing:4px}
.page-banner .en{font-size:12px;letter-spacing:5px;color:var(--accent);text-transform:uppercase;margin-top:8px}

/* Sub-nav */
.sub-nav{background:#fff;border-bottom:1px solid #E8EDF2}
.sub-nav .container{display:flex;gap:8px;flex-wrap:wrap;padding:14px 24px}
.sub-nav a{font-size:14px;color:var(--muted);padding:8px 22px;border-radius:30px;transition:all .3s;border:1px solid transparent}
.sub-nav a:hover{color:var(--primary);border-color:var(--primary)}
.sub-nav a.active{background:var(--primary);color:#fff}

/* Breadcrumb list */
.breadcrumb-bar{background:var(--light);border-bottom:1px solid #E8EDF2}
.breadcrumb-bar .container{display:flex;align-items:center;height:44px;font-size:13px;color:var(--muted)}
.breadcrumb-bar a{color:var(--muted)}
.breadcrumb-bar a:hover{color:var(--primary)}
.breadcrumb-bar .arrow{margin:0 10px;color:#ccc}
.breadcrumb-bar .current{color:var(--primary)}

/* Sections */
section{padding:70px 0}
.sec-light{background:var(--light)}
.section-head{max-width:700px;margin:0 auto 50px;text-align:center}
.section-head .cn{font-size:32px;font-weight:800;letter-spacing:4px;color:var(--primary)}
.section-head .cn a{color:inherit;transition:color .3s}
.section-head .cn a:hover{color:var(--accent)}
.section-head .en{font-size:12px;letter-spacing:5px;color:var(--steel);text-transform:uppercase;margin-top:8px}
.section-head::after{content:'';display:block;width:50px;height:3px;background:var(--accent);margin:18px auto 0}
.section-head p{color:var(--muted);font-size:14px;margin-top:16px}

/* Lists */
.page-section{padding:60px 0}
.list-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.article-card{background:#fff;border:1px solid #E8EDF2;border-radius:8px;padding:26px;transition:all .3s;display:flex;flex-direction:column;gap:8px}
.article-card:hover{box-shadow:0 16px 40px rgba(0,0,0,.1);transform:translateY(-4px);border-color:transparent}
.article-card .cat{font-size:11px;color:var(--accent);letter-spacing:1px}
.article-card h3{font-size:18px;font-weight:700;color:var(--text);line-height:1.5;cursor:pointer;transition:color .3s}
.article-card:hover h3{color:var(--primary)}
.article-card .date{font-size:12px;color:var(--muted)}
.article-card p{font-size:13px;color:var(--muted);line-height:1.8}

.pagination{display:flex;justify-content:center;gap:8px;margin-top:40px}
.pagination a,.pagination span{width:38px;height:38px;display:flex;align-items:center;justify-content:center;border:1px solid #E8EDF2;color:var(--muted);font-size:13px;transition:all .3s;border-radius:4px}
.pagination a:hover{color:#fff;background:var(--primary);border-color:var(--primary)}
.pagination .active{background:var(--primary);color:#fff;border-color:var(--primary)}

/* Detail page */
.detail{max-width:900px;margin:0 auto}
.detail-head{text-align:center;padding:30px 0 24px;border-bottom:1px solid #E8EDF2;margin-bottom:30px}
.detail-head h1{font-size:30px;font-weight:800;color:var(--text);line-height:1.5}
.detail-head .meta{color:var(--muted);font-size:13px;margin-top:16px}
.detail-head .meta span{margin:0 14px}
.detail-body{font-size:15px;color:var(--text);line-height:2.1}
.detail-body p{margin-bottom:18px;text-indent:2em}
.detail-body h3{color:var(--primary);margin:28px 0 14px;font-size:20px}
.detail-body img{width:100%;border-radius:8px;margin:20px 0}

/* Footer */
.footer{background:var(--dark);color:rgba(255,255,255,.7);padding:60px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr 1fr;gap:40px;padding-bottom:46px}
.footer h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:20px;position:relative;padding-bottom:12px}
.footer h4::after{content:'';position:absolute;bottom:0;left:0;width:30px;height:2px;background:var(--accent)}
.footer-brand p{font-size:13px;line-height:1.9;margin-bottom:14px}
.footer-links li{margin-bottom:9px}
.footer-links a{font-size:13px;color:rgba(255,255,255,.6);transition:all .3s}
.footer-links a:hover{color:#fff;padding-left:5px}
.footer-contact li{font-size:13px;margin-bottom:10px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:22px 0;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;font-size:12px;color:rgba(255,255,255,.5)}

/* Reveal */
.reveal{opacity:0;transform:translateY(30px);transition:all .7s cubic-bezier(.25,.46,.45,.94)}
.reveal.visible{opacity:1;transform:translateY(0)}

@media(max-width:1024px){
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .topbar .links{display:none}
  .header{top:0}
  .nav{display:none;position:fixed;top:0;left:0;width:100%;height:100vh;background:var(--primary-dark);flex-direction:column;padding:90px 40px;z-index:1001}
  .nav.open{display:flex}
  .nav>li>a{height:auto;padding:14px 0;color:#fff;font-size:18px;border-bottom:1px solid rgba(255,255,255,.08)}
  .dropdown{position:static;background:transparent;box-shadow:none;opacity:1;visibility:hidden;display:none;transform:none}
  .nav>li.open .dropdown{display:block;visibility:visible;opacity:1}
  .dropdown a{color:rgba(255,255,255,.7);padding:8px 20px}
  .dropdown a:hover{background:transparent;color:#fff}
  .menu-toggle{display:block}
  .menu-toggle.toggle-open{position:absolute;right:24px;top:24px}
  .menu-toggle.toggle-open span{background:#fff}
  .menu-toggle.toggle-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .menu-toggle.toggle-open span:nth-child(2){opacity:0}
  .menu-toggle.toggle-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .page-banner{height:200px}
  .page-banner h1{font-size:26px}
  .list-grid{grid-template-columns:1fr}
  .section-head .cn{font-size:24px}
  .detail-head h1{font-size:22px}
}
@media(max-width:480px){
  .footer-grid{grid-template-columns:1fr}
}