:root{
  --bg: #0b1220;
  --bg2:#0f1a2e;
  --card:#0d1730cc;
  --text:#e9eefc;
  --muted:#a9b6d8;
  --line:#21304e;
  --primary:#6ee7ff;
  --primary2:#8b5cf6;
  --shadow: 0 20px 60px rgba(0,0,0,.35);
  --radius: 18px;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  color:var(--text);
  background:
    radial-gradient(1200px 600px at 12% 10%, rgba(110,231,255,.18), transparent 60%),
    radial-gradient(1000px 600px at 80% 18%, rgba(139,92,246,.22), transparent 55%),
    linear-gradient(180deg, var(--bg) 0%, #070b14 100%);
  line-height:1.6;
}

a{ color:inherit; text-decoration:none; }
a:hover{ text-decoration:underline; text-underline-offset: 3px; }

.container{
  width:min(1120px, calc(100% - 40px));
  margin:0 auto;
}

.skip-link{
  position:absolute;
  left:-9999px;
  top:12px;
  padding:10px 12px;
  background:#ffffff;
  color:#111827;
  border-radius:10px;
  z-index:999;
}
.skip-link:focus{ left:12px; }

.header{
  position:sticky;
  top:0;
  z-index:50;
  backdrop-filter: blur(14px);
  background: rgba(11,18,32,.65);
  border-bottom: 1px solid rgba(33,48,78,.8);
}
.header__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:14px 0;
}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
  min-width: 0;
}
.brand__mark{
  display:grid;
  place-items:center;
  width:42px;
  height:42px;
  border-radius:14px;
  background: linear-gradient(135deg, rgba(110,231,255,.25), rgba(139,92,246,.25));
  border:1px solid rgba(110,231,255,.28);
  box-shadow: 0 10px 35px rgba(110,231,255,.08);
  font-weight:800;
  letter-spacing:.06em;
}
.brand__text{ display:flex; flex-direction:column; min-width:0; }
.brand__name{
  font-weight:700;
  font-size:14px;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.brand__tagline{
  font-size:12px;
  color:var(--muted);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}

.nav{ display:flex; align-items:center; gap:14px; }
.nav__link{
  font-size:14px;
  color:var(--muted);
  padding:10px 10px;
  border-radius:12px;
}
.nav__link:hover{
  color:var(--text);
  background: rgba(33,48,78,.5);
  text-decoration:none;
}
.nav__cta{
  color:#07111f;
  background: linear-gradient(135deg, var(--primary), rgba(139,92,246,.6));
  font-weight:700;
}
.nav__cta:hover{ filter: brightness(1.05); }

.menu-btn{
  display:none;
  width:44px;
  height:44px;
  border-radius:14px;
  border:1px solid rgba(33,48,78,.9);
  background: rgba(15,26,46,.65);
  color:var(--text);
  cursor:pointer;
}
.menu-btn span{
  display:block;
  width:18px;
  height:2px;
  margin:4px auto;
  background: rgba(233,238,252,.9);
  border-radius:999px;
}

.mobile-nav{
  border-top:1px solid rgba(33,48,78,.8);
  background: rgba(11,18,32,.92);
}
.mobile-nav__inner{
  display:flex;
  flex-direction:column;
  padding:14px 0 18px;
  gap:8px;
}
.mobile-nav__link{
  padding:12px 12px;
  border-radius:14px;
  background: rgba(15,26,46,.55);
  border:1px solid rgba(33,48,78,.8);
  color:var(--text);
}
.mobile-nav__cta{
  background: linear-gradient(135deg, rgba(110,231,255,.22), rgba(139,92,246,.24));
  border-color: rgba(110,231,255,.24);
}

.hero{
  padding: 56px 0 30px;
}
.hero__inner{
  display:grid;
  grid-template-columns: 1.25fr .9fr;
  gap:28px;
  align-items:stretch;
}
.eyebrow{
  display:inline-block;
  font-size:12px;
  color:var(--muted);
  padding:8px 10px;
  border:1px solid rgba(33,48,78,.9);
  border-radius:999px;
  background: rgba(15,26,46,.55);
}
.hero__title{
  margin:14px 0 10px;
  font-size:44px;
  line-height:1.12;
  letter-spacing:-.02em;
}
.hero__subtitle{
  margin:0 0 18px;
  font-size:16px;
  color: var(--muted);
}
.hero__actions{
  display:flex;
  gap:12px;
  flex-wrap:wrap;
  margin: 18px 0 18px;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:12px 16px;
  border-radius:14px;
  border:1px solid rgba(33,48,78,.9);
  background: rgba(15,26,46,.55);
  color:var(--text);
  font-weight:700;
  font-size:14px;
  box-shadow: 0 10px 30px rgba(0,0,0,.18);
}
.btn:hover{ text-decoration:none; filter: brightness(1.05); }
.btn--primary{
  color:#07111f;
  border-color: rgba(110,231,255,.32);
  background: linear-gradient(135deg, var(--primary), rgba(139,92,246,.65));
}
.btn--ghost{
  background: rgba(15,26,46,.25);
}
.btn--small{
  padding:10px 14px;
  font-size:13px;
  border-radius:12px;
}

.hero__meta{
  display:grid;
  grid-template-columns: 1fr;
  gap:12px;
  padding: 14px 14px;
  border-radius: var(--radius);
  border: 1px solid rgba(33,48,78,.9);
  background: rgba(15,26,46,.35);
}
.hero__meta-item dt{ font-size:12px; color: var(--muted); margin-bottom:4px; }
.hero__meta-item dd{ margin:0; font-size:14px; }

.card{
  height:100%;
  border-radius: calc(var(--radius) + 4px);
  border:1px solid rgba(110,231,255,.18);
  background:
    radial-gradient(900px 450px at 30% 20%, rgba(110,231,255,.12), transparent 60%),
    radial-gradient(850px 450px at 80% 60%, rgba(139,92,246,.14), transparent 60%),
    rgba(15,26,46,.35);
  box-shadow: var(--shadow);
  padding: 18px 18px 16px;
}
.card__header{ margin-bottom: 10px; }
.card__title{ margin:0 0 6px; font-size:18px; }
.card__desc{ margin:0; color: var(--muted); font-size:13px; }
.card__footer{ margin-top: 12px; }

.badge{
  display:inline-flex;
  align-items:center;
  padding: 6px 10px;
  border-radius: 999px;
  border:1px solid rgba(110,231,255,.22);
  background: rgba(110,231,255,.10);
  font-size:12px;
  font-weight:700;
  margin-right:8px;
  color: #dff9ff;
  white-space:nowrap;
}

.list{
  padding-left: 0;
  margin: 12px 0 0;
  list-style:none;
  display:flex;
  flex-direction:column;
  gap:10px;
}
.list__item{
  padding: 12px 12px;
  border-radius: 14px;
  border:1px solid rgba(33,48,78,.9);
  background: rgba(11,18,32,.35);
  color: var(--text);
  font-size:14px;
}
.link{ color: var(--primary); font-weight:700; }
.link:hover{ text-decoration:underline; }
.link--strong{ color: #dff9ff; }

.section{
  padding: 46px 0;
}
.section--alt{
  background: linear-gradient(180deg, rgba(15,26,46,.35), rgba(15,26,46,.08));
  border-top: 1px solid rgba(33,48,78,.55);
  border-bottom: 1px solid rgba(33,48,78,.55);
}
.section__header{
  margin-bottom: 18px;
}
.section__title{
  margin:0 0 10px;
  font-size:28px;
  letter-spacing:-.02em;
}
.section__subtitle{
  margin:0;
  color: var(--muted);
  font-size:15px;
  max-width: 72ch;
}

.grid{ display:grid; gap:14px; }
.grid--3{ grid-template-columns: repeat(3, 1fr); }
.grid--2{ grid-template-columns: repeat(2, 1fr); }

.feature, .service, .panel, .legal, .contact__card{
  border:1px solid rgba(33,48,78,.9);
  border-radius: var(--radius);
  background: rgba(15,26,46,.25);
  padding: 16px 16px;
}
.feature__title, .service__title, .panel__title{
  margin:0 0 8px;
  font-size:16px;
}
.feature__desc, .panel__desc, .panel__note{
  margin:0;
  color: var(--muted);
  font-size:14px;
}
.panel__note{ margin-top: 10px; }

.service__list{
  margin:10px 0 0;
  padding-left: 18px;
  color: var(--text);
}
.service__list li{ margin: 6px 0; color: var(--muted); }

.legal{ margin-top: 14px; }
.legal__title{ margin:0 0 8px; font-size:16px; }
.legal__list{
  margin:0;
  padding-left: 18px;
  color: var(--muted);
}
.legal__list li{ margin: 6px 0; }

.contact{
  display:grid;
  grid-template-columns: repeat(2, 1fr);
  gap:14px;
}
.contact__title{ margin:0 0 10px; font-size:16px; }
.contact__value{ margin:0 0 10px; color: var(--muted); }
.contact__hint{ margin:0; color: var(--muted); font-size:13px; }

.footer{
  border-top: 1px solid rgba(33,48,78,.75);
  background: rgba(7,11,20,.8);
  padding: 22px 0;
}
.footer__inner{
  display:flex;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
}
.footer__brand{ font-weight:800; letter-spacing:-.01em; }
.footer__meta{ color: var(--muted); font-size:13px; margin-top: 6px; }
.footer__beian{
  color: var(--muted);
  font-size:13px;
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  justify-content:flex-end;
  align-items:center;
}
.footer__sep{ opacity:.6; }
.footer__beian-logo{ width: 16px; height: 16px; }
.footer__copy{
  margin-top: 8px;
  color: rgba(169,182,216,.85);
  font-size:12px;
  text-align:right;
}

@media (max-width: 920px){
  .hero__inner{ grid-template-columns: 1fr; }
  .hero__title{ font-size: 36px; }
  .grid--3{ grid-template-columns: 1fr; }
  .grid--2{ grid-template-columns: 1fr; }
  .contact{ grid-template-columns: 1fr; }
  .nav{ display:none; }
  .menu-btn{ display:inline-grid; place-items:center; }
}