:root{--bg:#ffffff;--text:#1a1f36;--muted:#5a6473;--primary:#0b5cff;--primary-600:#0a4ae0;--primary-100:#e6f0ff;--surface:#f7f9fc;--border:#e6eaf0;--shadow:0 6px 24px rgba(11,92,255,.12)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:"Noto Sans SC",-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--text);background:var(--bg);line-height:1.6}img{max-width:100%;display:block}
.container{width:100%;max-width:1160px;margin:0 auto;padding:0 16px}
.skip-link{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden} .skip-link:focus{left:16px;top:16px;width:auto;height:auto;background:#000;color:#fff;padding:8px 12px;border-radius:6px;z-index:1000}

.site-header{position:sticky;top:0;background:rgba(255,255,255,.9);backdrop-filter:saturate(1.8) blur(8px);border-bottom:1px solid var(--border);z-index:100}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:12px;color:inherit;text-decoration:none}
.brand-logo{width:40px;height:40px;border-radius:8px}
.brand-text{font-weight:700;font-size:18px}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;padding:8px;border-radius:8px}
.nav-toggle:focus{outline:2px solid var(--primary)}
.nav-toggle-bar{width:24px;height:2px;background:var(--text)}
.site-nav .nav-list{display:flex;gap:20px;list-style:none;margin:0;padding:0;align-items:center}
.site-nav a{color:var(--text);text-decoration:none;padding:8px 10px;border-radius:8px}
.site-nav a:hover{background:var(--surface)}

.btn{display:inline-block;padding:10px 14px;border-radius:10px;text-decoration:none;font-weight:600}
.btn-primary{background:var(--primary);color:#fff;box-shadow:var(--shadow)}
.btn-primary:hover{background:var(--primary-600)}
.btn-ghost{border:1px solid var(--border);color:var(--text)}

.hero{padding:0;background:linear-gradient(180deg,var(--primary-100),#fff)}
.hero-inner{display:grid;grid-template-columns:1.15fr .85fr;gap:32px;align-items:center}
.hero h1{margin:0 0 12px;font-size:34px;line-height:1.2}
.hero p{color:var(--muted);margin:0 0 16px}
.hero-actions{display:flex;gap:12px;margin-top:8px}
.hero-media{border-radius:16px;overflow:hidden;box-shadow:var(--shadow)}

/* hero background slideshow */
.hero-media.hero-slideshow{position:relative;height:480px;border-radius:0}
.hero.hero-full .hero-media{border-radius:0}
.hero-slides{position:absolute;inset:0}
.hero-slide{position:absolute;inset:0;background-size:cover;background-position:center;background-repeat:no-repeat;opacity:0;transition:opacity .8s ease}
.hero-slide.active{opacity:1}
.hero-caption{position:absolute;left:0;right:0;bottom:0;background:rgba(0,0,0,.45);color:#fff;padding:14px 16px;font-size:18px;line-height:1.5}
.hero-dots{position:absolute;left:0;right:0;bottom:12px;display:flex;justify-content:center;gap:8px}
.hero-dot{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.6);border:none}
.hero-dot.active{background:#fff}

.section{padding:56px 0}
.section-alt{background:var(--surface)}
.section-head{max-width:760px;margin:0 auto 24px;text-align:center}
.section h2{margin:0 0 8px;font-size:28px}
.section-head p{color:var(--muted);margin:0}

.about-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.about-stat{background:#fff;border:1px solid var(--border);border-radius:12px;padding:18px;text-align:center;box-shadow:var(--shadow)}
.stat-number{font-size:28px;font-weight:800;color:var(--primary)}
.stat-label{color:var(--muted)}

.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.card{background:#fff;border:1px solid var(--border);border-radius:12px;padding:18px;display:flex;flex-direction:column;gap:6px;box-shadow:var(--shadow)}
.card h3{margin:0 0 6px;font-size:18px}
.card p{color:var(--muted);margin:0 0 8px}
.card-link{color:var(--primary);text-decoration:none;font-weight:600}

.team-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.person{background:#fff;border:1px solid var(--border);border-radius:12px;padding:18px;text-align:center;box-shadow:var(--shadow)}
.person img{margin:0 auto 10px;border-radius:50%}
.person-role{color:var(--muted);margin:4px 0 8px}

.pub-list{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.pub-list li{background:#fff;border:1px solid var(--border);border-radius:12px;padding:14px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:6px}
.pub-title{font-weight:600}
.pub-meta{color:var(--muted);font-size:14px}
.actions-center{display:flex;justify-content:center;margin-top:16px}

.news-list{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.news-item{background:#fff;border:1px solid var(--border);border-radius:12px;padding:16px;box-shadow:var(--shadow)}
.news-date{color:var(--muted);font-size:14px}
.news-title{margin:6px 0 8px;font-size:18px}
.news-link{color:var(--primary);text-decoration:none;font-weight:600}

.contact-form .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.form-field{display:flex;flex-direction:column;gap:6px;font-weight:600}
.form-field input,.form-field textarea{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:10px;font:inherit}
.form-field input:focus,.form-field textarea:focus{outline:2px solid var(--primary-100);border-color:var(--primary)}
.span-2{grid-column:span 2}

.site-footer{border-top:1px solid var(--border);background:#fff}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:18px 0}
.footer-brand{display:flex;align-items:center;gap:8px}
.footer-nav{display:flex;gap:12px}
.footer-nav a{color:var(--muted);text-decoration:none}
.footer-meta{color:var(--muted)}

.back-to-top{position:fixed;right:16px;bottom:24px;padding:10px 12px;border-radius:12px;border:1px solid var(--border);background:#fff;box-shadow:var(--shadow);cursor:pointer;display:none}
/* carousel */
.carousel{position:relative;border-radius:16px;overflow:hidden;box-shadow:var(--shadow);background:#000}
.carousel-track{display:flex;transition:transform .5s ease}
.carousel-slide{min-width:100%;height:320px;display:flex;align-items:center;justify-content:center;color:#fff;position:relative}
.carousel-slide img{width:100%;height:100%;object-fit:cover}
.carousel-caption{position:absolute;left:16px;bottom:16px;background:rgba(0,0,0,.45);padding:8px 12px;border-radius:10px}
.carousel-controls{position:absolute;inset:auto 0 12px 0;display:flex;justify-content:center;gap:8px}
.carousel-dot{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.6);border:none}
.carousel-dot.active{background:#fff}
.carousel-arrow{position:absolute;top:50%;transform:translateY(-50%);background:rgba(0,0,0,.45);color:#fff;border:none;width:36px;height:36px;border-radius:50%;cursor:pointer}
.carousel-arrow.prev{left:12px}
.carousel-arrow.next{right:12px}

/* tabs */
.tabs{border:1px solid var(--border);border-radius:12px;background:#fff;box-shadow:var(--shadow)}
.tab-list{display:flex;gap:8px;list-style:none;margin:0;padding:10px;border-bottom:1px solid var(--border);flex-wrap:wrap}
.tab-list button{padding:8px 12px;border:1px solid var(--border);background:#fff;border-radius:10px;cursor:pointer}
.tab-list button[aria-selected="true"]{background:var(--primary);color:#fff;border-color:var(--primary)}
.tab-panels{padding:14px}
.tab-panel{display:none}
.tab-panel.active{display:block}

/* accordion */
.accordion{display:grid;gap:8px}
.accordion-item{border:1px solid var(--border);border-radius:12px;background:#fff;box-shadow:var(--shadow)}
.accordion-header{width:100%;text-align:left;padding:12px 14px;border:none;background:#fff;border-radius:12px;display:flex;justify-content:space-between;align-items:center;cursor:pointer}
.accordion-content{display:none;padding:0 14px 14px;color:var(--muted)}
.accordion-item.open .accordion-content{display:block}

/* breadcrumb & pagination */
.breadcrumb{font-size:14px;color:var(--muted);margin:8px 0}
.breadcrumb a{text-decoration:none;color:var(--muted)}
.pagination{display:flex;gap:8px;align-items:center;justify-content:center;margin-top:16px}
.pagination button{padding:6px 10px;border:1px solid var(--border);background:#fff;border-radius:10px;cursor:pointer}
.pagination button.active{background:var(--primary);color:#fff;border-color:var(--primary)}

@media (max-width: 1024px){
  .hero-inner{grid-template-columns:1fr}
  .cards{grid-template-columns:repeat(2,1fr)}
  .news-list{grid-template-columns:1fr}
}
@media (max-width: 720px){
  .site-nav{position:fixed;inset:64px 0 auto 0;background:#fff;border-bottom:1px solid var(--border);display:none}
  .site-nav.open{display:block}
  .site-nav .nav-list{flex-direction:column;align-items:flex-start;padding:12px 16px}
  .nav-toggle{display:flex}
  .about-grid{grid-template-columns:1fr 1fr}
  .cards{grid-template-columns:1fr}
  .team-grid{grid-template-columns:1fr}
  .contact-form .form-grid{grid-template-columns:1fr}
  .span-2{grid-column:auto}
}