:root{--bg:#ffffff;--bg2:#f7f7fb;--surface0:#ffffff;--surface1:#ffffff;--surface2:#f9f9fb;--primary:#0f3a5a;--primary2:#3ea6d8;--accent:#1e5f89;--text:#0b0b0b;--muted:#5b5b5b;--border:rgba(20,20,20,.12);--ring:rgba(62,166,216,.35);--success:#16a34a;--warning:#f59e0b;--danger:#ef4444}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:radial-gradient(1200px 600px at 15% 10%, #ffffff 0%, var(--bg2) 45%, #ffffff 100%);color:var(--text);font-family:"Helvetica Neue", Helvetica, Arial, sans-serif}
a{color:var(--primary);text-decoration:none}
header{position:fixed;top:0;left:0;right:0;background:rgba(255,255,255,.75);backdrop-filter:blur(8px);border-bottom:1px solid var(--border);z-index:10}
.nav{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:14px 20px}
.brand{font-weight:800;color:var(--primary);letter-spacing:.6px;font-size:18px;display:flex;align-items:center;gap:10px}
.brand img{height:40px;width:auto;display:block}
@media (max-width: 480px){
  .brand img{height:32px}
}
.brand span{display:inline;font-family:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-weight:800}
.menu{display:flex;gap:8px;flex-wrap:wrap}
.menu a{color:#1f2937;padding:8px 10px;border-radius:10px}
.menu a:hover{color:#ffffff;background:linear-gradient(90deg,var(--primary),var(--primary2))}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.hero{padding:140px 0 70px;text-align:center}
.hero h1{margin:0 0 14px;font-size:52px;color:#111827;letter-spacing:1.2px}
.hero p{margin:0 auto 24px;max-width:820px;color:#4b5563;font-size:18px}
.actions{display:flex;gap:12px;justify-content:center}
.btn{display:inline-block;padding:11px 20px;border:1px solid var(--primary);border-radius:12px;color:var(--primary);transition:transform .2s ease, box-shadow .2s ease}
.btn:hover{transform:translateY(-1px);box-shadow:0 6px 16px rgba(62,166,216,.18)}
.btn.primary{background:linear-gradient(90deg,var(--primary),var(--primary2));color:#ffffff;border:none}
.btn.secondary{border-color:rgba(62,166,216,.35);color:var(--accent)}
.btn.ghost{border-color:transparent;color:var(--muted);background:transparent}
.section{padding:70px 0;border-top:1px solid var(--border)}
.section-title{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.section-title .badge{margin:0}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
.card{background:var(--surface1);border:1px solid var(--border);border-radius:14px;padding:20px;box-shadow:0 6px 20px rgba(17,24,39,.08);transition:transform .2s ease, border-color .2s ease}
.card:hover{transform:translateY(-3px);border-color:var(--primary)}
.card h3{margin:0 0 8px;color:#111827;font-size:20px}
.qrcode-placeholder{width:180px;height:180px;border:2px dashed var(--primary);border-radius:12px;display:flex;align-items:center;justify-content:center;color:var(--muted);margin-top:10px}
.qrcode{width:180px;height:auto;border:1px solid var(--border);border-radius:12px;box-shadow:0 6px 18px rgba(17,24,39,.08);margin-top:10px}
.qr-card{text-align:center}
footer{padding:34px 0;border-top:1px solid var(--border);text-align:center;color:#4b5563}
.footer-meta{display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap}
.footer-icons{display:flex;align-items:center;gap:10px}
.footer-icons .item{display:inline-flex;align-items:center;gap:6px;color:#4b5563}
.footer-icons .item:hover{color:var(--primary)}
.footer-icons .item[title="联系地址"]{display:none}
.icon{display:inline-flex;width:20px;height:20px;color:#6b7280}
.icon svg{width:100%;height:100%}
.card h3{display:flex;align-items:center;gap:12px;margin-left:0}
.title-icon{display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;border-radius:8px;background:linear-gradient(135deg,var(--primary),var(--primary2));color:#ffffff;flex:none}
.title-icon svg{width:14px;height:14px}
.title-icon.green{background:linear-gradient(135deg,#22c55e,#16a34a)}
.title-icon.orange{background:linear-gradient(135deg,#fb923c,#f97316)}
.title-icon.cyan{background:linear-gradient(135deg,#22d3ee,#06b6d4)}
.title-icon.blue{background:linear-gradient(135deg,#3b82f6,#2563eb)}
.title-icon.red{background:linear-gradient(135deg,#ef4444,#dc2626)}
.title-icon.purple{background:linear-gradient(135deg,#a78bfa,#7c3aed)}
.title-icon.indigo{background:linear-gradient(135deg,#818cf8,#4f46e5)}
.title-icon.gray{background:linear-gradient(135deg,#9ca3af,#6b7280)}

.video-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:16px}
.video-card{border:1px solid var(--border);border-radius:16px;background:var(--surface0);box-shadow:0 6px 18px rgba(0,0,0,.06);overflow:hidden}
.video-embed{position:relative;padding-top:56.25%;background:radial-gradient(circle at 30% 30%,rgba(62,166,216,.35),rgba(30,95,137,.25));}
.video-embed img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.video-embed iframe{position:absolute;inset:0;width:100%;height:100%;border:0;border-top-left-radius:16px;border-top-right-radius:16px}
.play-btn{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:56px;height:56px;border-radius:50%;background:#ef4444;color:#ffffff;display:flex;align-items:center;justify-content:center;box-shadow:0 10px 24px rgba(0,0,0,.18)}
.play-btn svg{width:24px;height:24px}
.embed-label{position:absolute;left:14px;bottom:12px;background:rgba(255,255,255,.9);color:#111827;border-radius:999px;padding:6px 10px;font-size:12px;border:1px solid rgba(20,20,20,.1)}
.video-card .video-meta{padding:14px}
.video-card .video-meta h3{display:flex;align-items:center;gap:8px;font-size:18px}
.video-card .video-meta p{color:#4b5563;margin:6px 0 12px}
.video-card .actions{display:flex;gap:10px}
.badge{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border-radius:999px;border:1px solid var(--border);background:transparent;color:#374151}
.badge.primary{background:linear-gradient(90deg,#e6f3ff,#eaf6ff);border-color:rgba(62,166,216,.25);color:#1e5f89;box-shadow:0 4px 10px rgba(62,166,216,.12)}
.tag{display:inline-block;padding:6px 10px;border-radius:8px;background:#ffffff;border:1px solid var(--border);color:#374151}
.input,.select,.textarea{width:100%;padding:10px 12px;border-radius:10px;border:1px solid var(--border);background:#ffffff;color:#111827;outline:none}
.input:focus,.select:focus,.textarea:focus{box-shadow:0 0 0 4px var(--ring)}
.alert{display:flex;align-items:flex-start;gap:10px;padding:12px 14px;border-radius:12px;border:1px solid var(--border);background:#ffffff}
.alert.success{border-color:rgba(34,197,94,.45)}
.alert.warning{border-color:rgba(245,158,11,.45)}
.alert.danger{border-color:rgba(239,68,68,.45)}
.table{width:100%;border-collapse:separate;border-spacing:0 8px}
.table th{color:#6b7280;font-weight:600;text-align:left;padding:8px}
.table td{background:#ffffff;border:1px solid var(--border);padding:10px;border-radius:10px}
.hidden{display:none!important}
/* themed watch buttons */
.btn.theme-blue{background:linear-gradient(90deg,#2563eb,#3b82f6);color:#ffffff;border:none}
.btn.theme-purple{background:linear-gradient(90deg,#7c3aed,#a78bfa);color:#ffffff;border:none}
.btn.theme-green{background:linear-gradient(90deg,#16a34a,#22c55e);color:#ffffff;border:none}
.btn.theme-orange{background:linear-gradient(90deg,#f97316,#fb923c);color:#ffffff;border:none}
.btn.theme-indigo{background:linear-gradient(90deg,#4f46e5,#818cf8);color:#ffffff;border:none}
.menu-toggle{display:none}

@media (max-width: 768px){
  .nav{padding:10px 14px}
  .brand{gap:8px}
  .brand span{display:inline;font-size:16px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:50vw}
  .menu-toggle{display:inline-flex;align-items:center;justify-content:center;padding:8px 10px;border:1px solid var(--border);border-radius:10px;background:#ffffff;color:#374151}
  .menu{display:none;position:absolute;top:100%;left:0;right:0;background:rgba(255,255,255,.97);backdrop-filter:blur(8px);border-bottom:1px solid var(--border);flex-direction:column;gap:0}
  .menu a{padding:12px 16px;border-radius:0;border-top:1px solid var(--border)}
  header.open .menu{display:flex}
}
@media (max-width: 768px){
  footer{padding:24px 0}
  .footer-meta{flex-direction:column;gap:8px}
  .footer-icons{flex-direction:column;align-items:center;gap:8px}
  .footer-icons .item{justify-content:center}
}