/* DAI 高频微观量化系统 · 官网样式
   设计口径：深色机构感、层次分明（渐变+投影+玻璃卡片），非扁平化 */
:root{
  --bg:#070b16; --bg2:#0c1426; --card:#101a2e; --line:rgba(120,160,255,.14);
  --txt:#e8eefc; --dim:#8fa2c4; --dim2:#63739a;
  --cyan:#4cc9f0; --gold:#f5b942; --green:#3ddc97; --red:#ff6b7a;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:
    radial-gradient(1200px 600px at 15% -10%, rgba(76,201,240,.10), transparent 60%),
    radial-gradient(900px 500px at 85% 0%, rgba(245,185,66,.08), transparent 55%),
    linear-gradient(180deg,var(--bg) 0%, var(--bg2) 55%, #060a12 100%);
  color:var(--txt);
  font-family:"Microsoft YaHei","PingFang SC","Segoe UI",system-ui,sans-serif;
  line-height:1.7; min-height:100vh;
}
a{color:var(--cyan);text-decoration:none}
.wrap{max-width:1180px;margin:0 auto;padding:0 28px}
/* 顶栏 */
header{
  position:sticky;top:0;z-index:50;
  background:linear-gradient(180deg, rgba(8,13,26,.96), rgba(8,13,26,.82));
  border-bottom:1px solid var(--line); backdrop-filter:blur(10px);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:11px;font-weight:700;font-size:17px;letter-spacing:.5px;color:#fff}
.mark{
  width:34px;height:34px;border-radius:9px;display:grid;place-items:center;
  background:linear-gradient(145deg,#16305c,#0b1a33);
  border:1px solid rgba(120,160,255,.35);
  box-shadow:0 6px 18px rgba(0,0,0,.45), inset 0 1px 0 rgba(255,255,255,.10);
  color:var(--gold);font-weight:800;font-size:15px
}
nav a{color:var(--dim);margin-left:26px;font-size:14px}
nav a:hover{color:#fff}
nav a.on{color:var(--gold)}
/* 主视觉 */
.hero{padding:84px 0 54px;position:relative;overflow:hidden}
.hero:after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(120,160,255,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(120,160,255,.05) 1px,transparent 1px);
  background-size:44px 44px;mask-image:radial-gradient(60% 60% at 50% 30%,#000,transparent)
}
.tag{
  display:inline-block;padding:5px 13px;border-radius:99px;font-size:12.5px;
  color:var(--gold);background:rgba(245,185,66,.09);
  border:1px solid rgba(245,185,66,.28);letter-spacing:.4px
}
h1{font-size:44px;line-height:1.25;margin:18px 0 14px;letter-spacing:.5px}
h1 em{font-style:normal;color:var(--gold)}
.lead{color:var(--dim);font-size:16.5px;max-width:760px}
.btns{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap}
.btn{
  display:inline-block;padding:13px 26px;border-radius:10px;font-weight:700;font-size:15px;
  background:linear-gradient(180deg,#f7c760,#e0a02a);color:#20160a;
  box-shadow:0 12px 26px rgba(245,185,66,.26), inset 0 1px 0 rgba(255,255,255,.55);
  border:1px solid rgba(255,255,255,.22)
}
.btn:hover{filter:brightness(1.06);transform:translateY(-1px)}
.btn.ghost{
  background:linear-gradient(180deg,rgba(28,44,74,.9),rgba(16,26,46,.9));color:#dfe9ff;
  border:1px solid rgba(120,160,255,.30);box-shadow:0 10px 24px rgba(0,0,0,.35)
}
/* 区块 */
section{padding:56px 0}
h2{font-size:27px;margin:0 0 8px;letter-spacing:.4px}
.sub{color:var(--dim2);margin-bottom:28px;font-size:14.5px}
.grid{display:grid;gap:18px}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.card{
  background:linear-gradient(160deg, rgba(20,32,56,.95), rgba(11,18,33,.95));
  border:1px solid var(--line);border-radius:14px;padding:24px;
  box-shadow:0 18px 40px rgba(0,0,0,.42), inset 0 1px 0 rgba(255,255,255,.05);
  position:relative;overflow:hidden
}
.card:before{
  content:"";position:absolute;left:0;top:0;width:100%;height:2px;
  background:linear-gradient(90deg,transparent,rgba(76,201,240,.55),transparent)
}
.card h3{margin:0 0 8px;font-size:17px}
.card p{margin:0;color:var(--dim);font-size:14.2px}
.k{color:var(--gold);font-weight:700}
/* 数据表 */
table{width:100%;border-collapse:collapse;font-size:14px;margin-top:6px}
th,td{padding:11px 12px;text-align:right;border-bottom:1px solid rgba(120,160,255,.10)}
th{color:var(--dim2);font-weight:500;font-size:12.5px;letter-spacing:.4px;text-align:right}
th:first-child,td:first-child{text-align:left}
tbody tr:hover{background:rgba(76,201,240,.04)}
.pos{color:var(--green)} .neg{color:var(--red)} .muted{color:var(--dim2)}
.note{
  margin-top:18px;padding:14px 16px;border-radius:10px;font-size:13px;color:#a9b7d4;
  background:rgba(76,201,240,.05);border-left:3px solid rgba(76,201,240,.55)
}
/* 价格 */
.price{display:flex;flex-direction:column;gap:6px}
.price .amt{font-size:38px;font-weight:800;color:#fff;letter-spacing:.5px}
.price .amt small{font-size:15px;color:var(--dim2);font-weight:400}
.price ul{margin:14px 0 0;padding-left:18px;color:var(--dim);font-size:14px}
.price li{margin:6px 0}
.badge{
  position:absolute;right:-30px;top:16px;transform:rotate(35deg);
  background:linear-gradient(180deg,#f7c760,#e0a02a);color:#20160a;
  font-size:11.5px;font-weight:800;padding:5px 36px;letter-spacing:1px
}
/* 下载 */
.dl{
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  padding:22px 24px;border-radius:14px;
  background:linear-gradient(150deg, rgba(24,40,72,.95), rgba(12,20,36,.95));
  border:1px solid rgba(120,160,255,.22);
  box-shadow:0 18px 40px rgba(0,0,0,.42)
}
.mono{font-family:Consolas,"Courier New",monospace;font-size:12.5px;color:var(--dim)}
ol.steps{color:var(--dim);font-size:14.2px;padding-left:20px}
ol.steps li{margin:9px 0}
ol.steps b{color:#fff}
/* 文档 */
.doc h3{margin-top:26px}
.doc code{background:rgba(120,160,255,.10);padding:2px 6px;border-radius:5px;font-size:13px;color:#bcd2ff}
/* 页脚 */
footer{
  margin-top:40px;padding:30px 0 46px;border-top:1px solid var(--line);
  color:var(--dim2);font-size:12.8px
}
footer .cols{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
footer a{color:var(--dim2);margin-right:16px}
footer a:hover{color:#fff}
@media(max-width:900px){
  .g3,.g2{grid-template-columns:1fr}
  h1{font-size:32px}
  nav a{display:none}
}