:root{
  --bg0:#070A12;
  --bg1:#0B1222;
  --card: rgba(255,255,255,.08);
  --card2: rgba(255,255,255,.12);
  --stroke: rgba(255,255,255,.16);
  --text: rgba(255,255,255,.92);
  --muted: rgba(255,255,255,.70);
  --shadow: 0 18px 60px rgba(0,0,0,.45);
  --r: 22px;
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI",
               "PingFang SC","Hiragino Sans GB","Microsoft YaHei", Arial, sans-serif;
  color: var(--text);
  background: radial-gradient(1200px 700px at 50% 20%, #121a38 0%, var(--bg0) 60%, #05060b 100%);
  overflow-x:hidden;
}

.bg{
  position:fixed;
  inset:0;
  pointer-events:none;
  filter: blur(28px) saturate(120%);
  opacity:.95;
}
.blob{
  position:absolute;
  width:520px;
  height:520px;
  border-radius: 999px;
  mix-blend-mode: screen;
  transform: translate3d(0,0,0);
  animation: float 10s ease-in-out infinite;
}
.b1{ left:-120px; top:-120px; background: radial-gradient(circle at 30% 30%, #6EE7FF, transparent 55%); }
.b2{ right:-160px; top:80px; background: radial-gradient(circle at 30% 30%, #A78BFA, transparent 55%); animation-delay:-2.5s;}
.b3{ left:10%; bottom:-220px; background: radial-gradient(circle at 30% 30%, #34D399, transparent 55%); animation-delay:-5s;}

@keyframes float{
  0%,100%{ transform: translate(0,0) scale(1); }
  50%{ transform: translate(20px,-18px) scale(1.04); }
}

.wrap{
  min-height:100%;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:flex-start;
  padding: 40px 20px 28px;
}

/* 让内容“中间偏上” */
.hero{
  margin-top: clamp(24px, 6vh, 70px);
  text-align:center;
  max-width: 860px;
}
.badge{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.14);
  box-shadow: 0 12px 40px rgba(0,0,0,.28);
  font-size: 12.5px;
  letter-spacing:.4px;
  color: var(--muted);
}
.title{
  margin: 16px 0 8px;
  font-size: clamp(28px, 4vw, 44px);
  line-height:1.1;
  letter-spacing:.2px;
}
.subtitle{
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 14.5px;
}

.panel{
  width: min(980px, 100%);
  margin-top: 14px;
  padding: 18px;
  border-radius: var(--r);
  background: linear-gradient(180deg, rgba(255,255,255,.10), rgba(255,255,255,.06));
  border: 1px solid rgba(255,255,255,.14);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

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

.btn{
  appearance:none;
  border:none;
  cursor:pointer;
  color: var(--text);
  border-radius: 18px;
  position:relative;
  user-select:none;
  text-align:left;
}

.btn-card{
  padding: 18px 18px 16px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.14);
  box-shadow: 0 12px 36px rgba(0,0,0,.25);
  min-height: 120px;
  transition: transform .18s ease, background .18s ease, border-color .18s ease;
}
.btn-card:hover{
  transform: translateY(-3px);
  background: rgba(255,255,255,.11);
  border-color: rgba(255,255,255,.22);
}
.btn-card:active{ transform: translateY(-1px) scale(.99); }

.btn-primary{
  width:100%;
  margin-top: 14px;
  padding: 18px 18px 16px;
  min-height: 86px;
  background: linear-gradient(135deg, rgba(110,231,255,.28), rgba(167,139,250,.26), rgba(52,211,153,.22));
  border: 1px solid rgba(255,255,255,.18);
  box-shadow: 0 18px 52px rgba(0,0,0,.30);
  transition: transform .18s ease, filter .18s ease, border-color .18s ease;
}
.btn-primary:hover{
  transform: translateY(-2px);
  filter: brightness(1.06);
  border-color: rgba(255,255,255,.28);
}
.btn-primary:active{ transform: translateY(-1px) scale(.995); }

.btn-title{
  display:block;
  font-weight: 700;
  font-size: 18px;
  letter-spacing:.2px;
}
.btn-desc{
  display:block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--muted);
}

.btn-arrow{
  position:absolute;
  right: 14px;
  top: 12px;
  font-size: 18px;
  opacity:.75;
}

.divider{
  height: 1px;
  background: rgba(255,255,255,.14);
  margin: 14px 2px;
}

.hint{
  margin: 12px 2px 0;
  color: rgba(255,255,255,.62);
  font-size: 12.5px;
}
kbd{
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.16);
  border-bottom-color: rgba(255,255,255,.10);
  padding: 2px 6px;
  border-radius: 8px;
  font-size: 12px;
}

.footer{
  margin-top: auto;
  padding-top: 18px;
  color: rgba(255,255,255,.55);
  font-size: 12.5px;
}

/* 响应式 */
@media (max-width: 900px){
  .grid{ grid-template-columns: 1fr; }
  .btn-card{ min-height: 96px; }
}