:root{
  --bg:#f6f7f9;
  --surface:#ffffff;
  --text:#1c2230;
  --text-soft:#5c6577;
  --line:#e6e9ef;
  --brand:#12508f;
  --brand-2:#1e88c7;
  --accent:#0f9d8e;
  --shadow:0 1px 2px rgba(20,30,50,.05), 0 8px 24px rgba(20,30,50,.07);
  --radius:14px;
  --max:1200px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{width:100%;max-width:var(--max);margin:0 auto;padding:0 20px}
.muted{color:var(--text-soft)}
.small{font-size:13px}
code{background:#eef1f6;padding:2px 6px;border-radius:6px;font-size:13px}

/* ============ header ============ */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.86);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:24px;height:64px}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand-mark{
  width:36px;height:36px;border-radius:10px;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#fff;font-weight:700;font-size:14px;letter-spacing:.5px;
  display:grid;place-items:center;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:15px}
.brand-text small{font-size:11px;color:var(--text-soft);letter-spacing:.6px}
.nav{margin-left:auto;display:flex;gap:26px}
.nav a{font-size:14px;color:var(--text-soft);transition:color .2s}
.nav a:hover{color:var(--brand)}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:8px;font-size:18px;padding:2px 10px;cursor:pointer}

/* ============ hero ============ */
.hero{
  position:relative;overflow:hidden;
  background:
    radial-gradient(900px 400px at 12% -10%, rgba(30,136,199,.22), transparent 60%),
    radial-gradient(700px 380px at 92% 0%, rgba(15,157,142,.18), transparent 60%),
    linear-gradient(180deg,#ffffff 0%,#f2f6fb 100%);
  border-bottom:1px solid var(--line);
  padding:64px 0 56px;
}
.hero-kicker{
  display:inline-block;margin:0 0 14px;
  font-size:12px;letter-spacing:2px;color:var(--brand);
  background:rgba(18,80,143,.08);border:1px solid rgba(18,80,143,.16);
  padding:4px 12px;border-radius:999px;
}
.hero h1{
  margin:0 0 14px;font-size:clamp(28px,4.6vw,46px);line-height:1.22;letter-spacing:-.5px;
}
.hero-sub{margin:0 0 26px;max-width:620px;color:var(--text-soft);font-size:15px}
.hero-search{display:flex;gap:10px;max-width:560px}
.hero-search input{
  flex:1;height:46px;border-radius:12px;border:1px solid var(--line);
  background:#fff;padding:0 16px;font-size:15px;color:var(--text);outline:none;
  box-shadow:var(--shadow);transition:border-color .2s;
}
.hero-search input:focus{border-color:var(--brand-2)}
.hero-search button{
  height:46px;padding:0 22px;border:0;border-radius:12px;cursor:pointer;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;font-size:15px;font-weight:600;
  box-shadow:var(--shadow);
}
.hero-search button:hover{filter:brightness(1.06)}
.hero-stats{display:flex;gap:28px;margin-top:26px;flex-wrap:wrap}
.hero-stats div{font-size:13px;color:var(--text-soft)}
.hero-stats b{display:block;font-size:22px;color:var(--text);font-weight:700;line-height:1.3}

/* ============ gallery ============ */
.gallery{padding:52px 20px 12px}
.section-head{display:flex;align-items:baseline;gap:14px;margin-bottom:18px}
.section-head h2{margin:0;font-size:22px;letter-spacing:-.3px}
.filters{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px}
.chip{
  border:1px solid var(--line);background:#fff;color:var(--text-soft);
  padding:7px 16px;border-radius:999px;font-size:13.5px;cursor:pointer;transition:all .18s;
}
.chip:hover{border-color:var(--brand-2);color:var(--brand)}
.chip.active{background:var(--brand);border-color:var(--brand);color:#fff}

.grid{
  display:grid;gap:20px;
  grid-template-columns:repeat(auto-fill,minmax(268px,1fr));
}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow);cursor:pointer;
  transition:transform .22s ease,box-shadow .22s ease;
  display:flex;flex-direction:column;
}
.card:hover{transform:translateY(-3px);box-shadow:0 12px 30px rgba(20,30,50,.12)}
.card-cover{position:relative;aspect-ratio:4/3;background:#e9edf3;overflow:hidden}
.card-cover img,.card-cover video{width:100%;height:100%;object-fit:cover}
.cover-fallback{
  position:absolute;inset:0;display:grid;place-items:center;color:#fff;
  font-size:30px;font-weight:700;letter-spacing:2px;
  background:linear-gradient(135deg,#2b6fb0,#12a08f);
}
.badge{
  position:absolute;top:10px;left:10px;z-index:2;
  background:rgba(15,20,30,.62);color:#fff;font-size:11.5px;letter-spacing:.5px;
  padding:3px 9px;border-radius:999px;backdrop-filter:blur(6px);
}
.badge.play{background:rgba(200,40,40,.82)}
.card-body{padding:15px 16px 17px;display:flex;flex-direction:column;gap:6px;flex:1}
.card-body h3{margin:0;font-size:15.5px;line-height:1.4}
.card-body p{margin:0;font-size:13px;color:var(--text-soft);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px;padding-top:10px}
.tag{font-size:12px;color:var(--accent);background:rgba(15,157,142,.1);padding:3px 9px;border-radius:6px}
.link-out{font-size:13px;color:var(--brand);font-weight:600}
.empty{text-align:center;color:var(--text-soft);padding:60px 0;font-size:15px}

/* ============ about / contact ============ */
.about,.contact{padding:44px 20px 0}
.about-card,.contact-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 30px;box-shadow:var(--shadow);
}
.about-card h2,.contact-card h2{margin:0 0 12px;font-size:19px}
.about-card p{margin:0 0 18px;color:var(--text-soft);font-size:14.5px}
.about-list{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.about-list li{font-size:14px;color:var(--text-soft);display:flex;gap:14px;flex-wrap:wrap}
.about-list li span{min-width:76px;color:var(--text);font-weight:600}
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px;margin-bottom:16px}
.contact-grid div{background:#f7f9fc;border:1px solid var(--line);border-radius:11px;padding:14px 16px}
.contact-grid span{display:block;font-size:12.5px;color:var(--text-soft);margin-bottom:4px}
.contact-grid b{font-size:15px}

/* ============ footer ============ */
.site-footer{margin-top:56px;border-top:1px solid var(--line);background:#fff}
.site-footer p{margin:0;padding:22px 0;text-align:center;font-size:13px;color:var(--text-soft)}

/* ============ lightbox ============ */
.lightbox{
  position:fixed;inset:0;z-index:100;
  background:rgba(12,16,24,.9);backdrop-filter:blur(6px);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px;
  padding:52px 20px 28px;
}
.lb-stage{max-width:min(1100px,92vw);max-height:68vh;display:grid;place-items:center}
.lb-stage img,.lb-stage video{max-width:min(1100px,92vw);max-height:68vh;border-radius:12px;box-shadow:0 20px 50px rgba(0,0,0,.5)}
.lb-info{max-width:min(900px,92vw);text-align:center;color:#f2f5f9}
.lb-info h3{margin:0 0 6px;font-size:18px}
.lb-info p{margin:0 0 10px;font-size:14px;color:#c3cbd8}
.lb-link{display:inline-block;background:#fff;color:#12508f;font-weight:700;font-size:14px;
  padding:9px 20px;border-radius:10px}
.lb-close,.lb-prev,.lb-next{
  position:absolute;background:rgba(255,255,255,.14);color:#fff;border:0;cursor:pointer;
  border-radius:50%;width:42px;height:42px;font-size:20px;line-height:1;
  transition:background .2s;
}
.lb-close:hover,.lb-prev:hover,.lb-next:hover{background:rgba(255,255,255,.26)}
.lb-close{top:18px;right:20px}
.lb-prev{left:18px;top:50%;transform:translateY(-50%)}
.lb-next{right:18px;top:50%;transform:translateY(-50%)}

/* ============ mobile ============ */
@media (max-width:720px){
  .nav{
    position:absolute;top:64px;left:0;right:0;
    background:#fff;border-bottom:1px solid var(--line);
    flex-direction:column;gap:0;padding:6px 20px 14px;
    display:none;
  }
  .nav.open{display:flex}
  .nav a{padding:11px 0;border-bottom:1px solid var(--line)}
  .nav-toggle{display:block}
  .hero{padding:44px 0 40px}
  .hero-stats{gap:20px}
  .grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:14px}
  .card-body{padding:12px 13px 14px}
  .card-body h3{font-size:14px}
  .card-body p{display:none}
  .about-card,.contact-card{padding:22px 20px}
  .lb-prev,.lb-next{width:36px;height:36px}
  .lb-prev{left:8px}.lb-next{right:8px}
}