:root{
  --bg:#0b1630;
  --bg2:#0e2348;
  --text:#eaf1ff;
  --muted:rgba(234,241,255,.75);
  --line:rgba(255,255,255,.12);
  --brand:#2f7bff;
  --card:rgba(255,255,255,.06);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC","Microsoft YaHei", Arial, sans-serif;
  color:var(--text);
  background: radial-gradient(1200px 800px at 30% 10%, #1a3b78 0%, var(--bg) 40%, #071023 100%);
}

a{color:inherit;text-decoration:none}
.container{width:min(1200px, 92vw); margin:0 auto}

/* Header */
.site-header{
  position:fixed; inset:0 0 auto 0;
  z-index:50;
  transition: background .25s ease, border-color .25s ease, backdrop-filter .25s ease;
  border-bottom:1px solid transparent;
}
.site-header.is-solid{
  background: rgba(5,12,28,.62);
  border-bottom:1px solid var(--line);
  backdrop-filter: blur(10px);
}

.header-inner{
  height:72px;
  display:flex;
  align-items:center;
  gap:18px;
}

.logo{display:flex; flex-direction:column; line-height:1.05}
.logo-mark{font-weight:800; letter-spacing:.6px; font-size:20px}
.logo-sub{font-size:12px; opacity:.8}

.nav{
  margin-left:auto;
  display:flex;
  gap:22px;
  align-items:center;
}
.nav-item{
  font-size:15px;
  opacity:.88;
  padding:10px 4px;
  border-bottom:2px solid transparent;
}
.nav-item:hover{opacity:1}
.nav-item.active{opacity:1;border-bottom-color:rgba(255,255,255,.7)}
.nav-toggle{
  display:none;
  margin-left:auto;
  background:transparent;
  border:1px solid var(--line);
  color:var(--text);
  padding:8px 10px;
  border-radius:10px;
}

/* Hero */
.hero{
  position:relative;
  min-height:100vh;
  display:grid;
  place-items:center;
  overflow:hidden;
}
.hero-bg{
  position:absolute; inset:0;
  background:
    linear-gradient(120deg, rgba(7,16,35,.3), rgba(7,16,35,.75)),
    /* 你放图片后改这里：url("../img/banner-bg.jpg") */
    url("../img/banner1.jpg");
  background-size:cover;
  background-position:center;
  transform: scale(1.05);
  filter:saturate(1.05) contrast(1.05);
}
.hero-mask{
  position:absolute; inset:0;
  background: radial-gradient(900px 500px at 50% 40%, rgba(255,255,255,.08), rgba(0,0,0,0) 60%),
              linear-gradient(to bottom, rgba(0,0,0,.05), rgba(0,0,0,.45));
}

.hero-content{
  position:relative;
  padding-top:90px;
  text-align:center;
}
.hero-title-en{
  font-weight:800;
  letter-spacing:2px;
  font-size: clamp(30px, 4.4vw, 58px);
  text-transform: uppercase;
  text-shadow: 0 12px 40px rgba(0,0,0,.45);
}
.hero-title-cn{
  margin-top:10px;
  font-size: clamp(18px, 2.2vw, 34px);
  opacity:.92;
  text-shadow: 0 12px 40px rgba(0,0,0,.45);
}

.hero-actions{
  margin-top:26px;
  display:flex;
  gap:12px;
  justify-content:center;
  flex-wrap:wrap;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:44px;
  padding:0 18px;
  border-radius:999px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.06);
  color:var(--text);
  cursor:pointer;
  transition: transform .15s ease, background .15s ease, border-color .15s ease;
}
.btn:hover{transform: translateY(-1px); background: rgba(255,255,255,.10)}
.btn-primary{
  background: linear-gradient(135deg, #2f7bff, #1ad1ff);
  border-color: rgba(255,255,255,.18);
  color:#06122a;
  font-weight:700;
}
.btn-ghost{
  background: rgba(0,0,0,.18);
}

.hero-dots{
  margin-top:38px;
  display:flex;
  gap:10px;
  justify-content:center;
}
.dot{
  width:10px;height:10px;border-radius:50%;
  background: rgba(255,255,255,.35);
  border:1px solid rgba(255,255,255,.22);
}
.dot.active{background: rgba(255,255,255,.92)}

/* Float tools */
.float-tools{
  position:fixed;
  right:18px;
  bottom:28px;
  display:flex;
  flex-direction:column;
  gap:10px;
  z-index:60;
}
.float-btn{
  width:56px;
  height:56px;
  border-radius:14px;
  border:1px solid var(--line);
  background: rgba(5,12,28,.55);
  color:var(--text);
  backdrop-filter: blur(8px);
  cursor:pointer;
  display:grid;
  place-items:center;
}
.float-btn:hover{background: rgba(5,12,28,.75)}

/* Sections */
.section{padding:78px 0}
.section-alt{background: linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,0))}
.section-title{
  margin:0 0 14px;
  font-size:28px;
  letter-spacing:.5px;
}
.section-desc{margin:0 0 22px; color:var(--muted); line-height:1.85}

.cards{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap:14px;
}
.card{
  padding:18px 16px;
  border-radius:16px;
  border:1px solid var(--line);
  background: var(--card);
}
.card h3{margin:0 0 8px}
.card p{margin:0; color:var(--muted); line-height:1.8}

.grid{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap:14px;
}
.grid-item{
  border:1px solid var(--line);
  background: var(--card);
  border-radius:16px;
  overflow:hidden;
}
.thumb{
  height:150px;
  background:
    linear-gradient(135deg, rgba(47,123,255,.35), rgba(26,209,255,.12)),
    radial-gradient(600px 180px at 10% 10%, rgba(255,255,255,.18), rgba(255,255,255,0));
  background-size: cover;
  background-position: center;
}
.meta{padding:14px}
.name{font-weight:800}
.tag{margin-top:6px; color:var(--muted); font-size:13px}

.stats{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap:14px;
}
.stat{
  padding:18px 16px;
  border-radius:16px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.04);
}
.stat .num{font-weight:900; font-size:18px}
.stat .label{margin-top:6px; color:var(--muted); font-size:13px}

.news{list-style:none; padding:0; margin:0; display:grid; gap:10px}
.news li{
  display:flex; gap:12px; align-items:center;
  padding:12px 14px;
  border-radius:14px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.03);
}
.news .date{opacity:.8; width:88px; font-variant-numeric: tabular-nums}
.news .title{color:var(--text); opacity:.95}

.contact{
  display:grid;
  grid-template-columns: 1.1fr .9fr;
  gap:14px;
}
.contact-box{
  border:1px solid var(--line);
  background: var(--card);
  border-radius:16px;
  padding:16px;
}
.row{display:flex; gap:12px; padding:10px 0; border-bottom:1px dashed rgba(255,255,255,.10)}
.row:last-of-type{border-bottom:none}
.k{width:60px; color:var(--muted)}
.v{color:var(--text); opacity:.95}
.hint{margin:12px 0 0; color:var(--muted); font-size:13px; line-height:1.7}

.mini-title{margin:0 0 10px}
.form{display:grid; gap:10px}
.form input,.form textarea{
  width:100%;
  border-radius:12px;
  border:1px solid var(--line);
  padding:12px 12px;
  background: rgba(0,0,0,.18);
  color:var(--text);
  outline:none;
}
.form textarea{min-height:120px; resize:vertical}

.footer{
  border-top:1px solid var(--line);
  background: rgba(0,0,0,.22);
}
.footer-inner{
  height:64px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  color:rgba(234,241,255,.78);
  font-size:14px;
}

/* Responsive */
@media (max-width: 980px){
  .nav{display:none}
  .nav-toggle{display:inline-flex}
  .cards{grid-template-columns:1fr}
  .grid{grid-template-columns:1fr 1fr}
  .stats{grid-template-columns:1fr 1fr}
  .contact{grid-template-columns:1fr}
}
@media (max-width: 520px){
  .grid{grid-template-columns:1fr}
  .footer-inner{flex-direction:column; gap:6px; padding:10px 0; height:auto}
}