/* Yoomoo 官网。和后台同一套颜色：墨蓝底 + 金色（买入）+ 红色（止盈赚钱，红涨绿跌） */
:root{
  color-scheme: light;
  --night:#121C2B; --night2:#1A2738; --line:rgba(255,255,255,.06); --on:#E8EDF4; --dim:#93A1B4;
  --gold:#E0A100; --gold2:#F2C14E; --red:#E5484D; --paper:#F3F5F7; --ink:#1A2433; --muted:#5E6B7D; --rule:#D5DBE3;
  --num:"DIN Alternate","Bahnschrift","Roboto Condensed","Arial Narrow",sans-serif;
  --sans:"PingFang SC","Noto Sans SC","Microsoft YaHei","Helvetica Neue",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font:16px/1.7 var(--sans);color:var(--ink);background:var(--night2)}
a{color:inherit}
:focus-visible{outline:2px solid var(--gold2);outline-offset:3px;border-radius:4px}
.wrap{max-width:1160px;margin:0 auto;padding:0 28px}
.grow{flex:1}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;font-weight:600;
  font-size:15px;padding:9px 18px;border-radius:8px;border:1px solid transparent;white-space:nowrap}
.btn.big{font-size:16px;padding:13px 24px}
.btn.gold{background:var(--gold);color:#1A1405}
.btn.gold:hover{background:var(--gold2)}
.btn.ghost{color:var(--on);border-color:rgba(255,255,255,.22)}
.btn.ghost:hover{border-color:rgba(255,255,255,.5)}

/* 首屏：墨蓝底 + 右上一点金色光晕 */
.hero{color:var(--on);background:
  radial-gradient(1200px 520px at 78% 30%, rgba(224,161,0,.10), transparent 60%),
  linear-gradient(180deg, var(--night), var(--night2));padding-bottom:40px;
  min-height:100vh;display:flex;flex-direction:column}
.hero-in{flex:1}
.hero > .wrap{width:100%}  /* 在纵向 flex 里，左右 auto 外边距会让子元素缩成内容宽度，这里撑满 */
.bar{display:flex;align-items:center;gap:20px;height:72px}
.logo{font:700 22px/1 var(--num);letter-spacing:.01em;text-decoration:none;color:#fff;display:flex;align-items:baseline;gap:10px}
.logo small{font:400 13px var(--sans);color:var(--dim);letter-spacing:0}
.bar .link{text-decoration:none;color:var(--on);font-size:15px;font-weight:600;padding:8px 17px;
  border:1px solid rgba(255,255,255,.28);border-radius:8px}
.bar .lang{display:inline-flex;align-items:center;gap:6px;text-decoration:none;color:var(--dim);font-size:14px;
  padding:5px 10px;border:1px solid rgba(255,255,255,.16);border-radius:999px}
.bar .lang:hover{color:#fff;border-color:rgba(255,255,255,.4)}
.bar .lang svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:1.6}
.lang-en h1{font-size:clamp(40px,5.6vw,72px);letter-spacing:-.025em}
.bar .link:hover{color:#fff;border-color:rgba(255,255,255,.6)}
.hero-in{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.08fr);gap:56px;align-items:center;padding-top:48px;padding-bottom:40px}
h1{font:700 clamp(44px,6.4vw,82px)/1.04 var(--sans);letter-spacing:-.02em;margin:0 0 24px;color:#fff}
.lede{font-size:18px;line-height:1.8;color:#C9D3E0;max-width:34em;margin:0}
.cta{display:flex;gap:12px;flex-wrap:wrap}
.fine{font-size:13px;color:var(--dim);margin:16px 0 0}
.chart{margin:0}
.chart svg{display:block;width:100%;height:auto}
.chart figcaption{font-size:12px;color:var(--dim);margin-top:6px}

/* 回测数字：像行情牌，数字是主角 */
.tape{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-top:1px solid rgba(255,255,255,.12);padding-top:22px}
.tape div{padding:0 20px;border-left:1px solid rgba(255,255,255,.12)}
.tape div:first-child{padding-left:0;border-left:0}
.tape b{display:block;font:700 clamp(30px,3.6vw,46px)/1.1 var(--num);color:#fff;letter-spacing:.01em}
.tape div:nth-child(-n+2) b{color:var(--gold2)}
.tape span{font-size:14px;color:var(--dim)}
.tape-note{font-size:12px;color:#7D8A9C;margin:14px auto 0}
.tape-note a{color:var(--on)}

@media (max-width:900px){
  .hero-in{grid-template-columns:minmax(0,1fr);gap:32px;padding-top:24px}
  .tape{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:20px}
  .tape div:nth-child(3){padding-left:0;border-left:0}
}
@media (max-width:520px){
  .wrap{padding:0 18px}
  .logo small{display:none}
  .bar .link{display:none}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}