:root{
  --bg:#070b16; --bg2:#0c1224; --card:rgba(255,255,255,.045);
  --line:rgba(255,255,255,.09); --txt:#eef1f8; --mut:#9aa3bd;
  --mars:#ff5a36; --mars2:#ff9a3c; --ice:#7dd3fc;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--txt);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  line-height:1.7;overflow-x:hidden}
#stars{position:fixed;inset:0;z-index:0;pointer-events:none}
.wrap{max-width:1120px;margin:0 auto;padding:0 22px;position:relative;z-index:1}
/* nav */
nav{position:fixed;top:0;left:0;right:0;z-index:50;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  background:rgba(7,11,22,.72);border-bottom:1px solid var(--line)}
nav .wrap{display:flex;align-items:center;justify-content:space-between;height:62px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:1px;text-decoration:none;color:var(--txt)}
.logo .dot{width:30px;height:30px;border-radius:50%;
  background:radial-gradient(circle at 35% 35%,#ffb37a,#ff5a36 55%,#a32c12);
  box-shadow:0 0 18px rgba(255,90,54,.55)}
.navlinks{display:flex;gap:26px}
.navlinks a{color:var(--mut);text-decoration:none;font-size:14.5px;transition:color .2s}
.navlinks a:hover{color:var(--txt)}
@media(max-width:640px){.navlinks{display:none}}
/* hero */
.hero{min-height:96vh;display:flex;align-items:center;padding:130px 0 70px;position:relative}
.hero h1{font-size:clamp(44px,7.5vw,88px);font-weight:900;letter-spacing:2px;line-height:1.25;
  background:linear-gradient(100deg,#fff 20%,var(--mars2) 55%,var(--mars) 80%);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.hero .en{font-size:clamp(15px,2.4vw,21px);letter-spacing:10px;color:var(--mut);margin:14px 0 6px;font-weight:600}
.hero p.sub{font-size:clamp(16px,2.6vw,20px);color:var(--mut);max-width:640px;margin:18px 0 36px}
.cta{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 30px;border-radius:999px;font-size:16px;font-weight:700;
  text-decoration:none;transition:transform .18s,box-shadow .18s}
.btn.solid{background:linear-gradient(120deg,var(--mars),#e03e1f);color:#fff;
  box-shadow:0 8px 28px rgba(255,90,54,.35)}
.btn.solid:hover{transform:translateY(-2px);box-shadow:0 12px 34px rgba(255,90,54,.5)}
.btn.ghost{border:1px solid var(--line);color:var(--txt);background:var(--card)}
.btn.ghost:hover{transform:translateY(-2px);border-color:rgba(255,255,255,.25)}
.marsball{position:absolute;right:-60px;top:16%;width:min(38vw,420px);aspect-ratio:1;border-radius:50%;
  background:radial-gradient(circle at 32% 30%,#ffc79a 0%,#ff8a4d 28%,#e0512a 55%,#7e2410 82%,#3d1006 100%);
  box-shadow:0 0 120px rgba(255,90,54,.35),inset -30px -30px 80px rgba(0,0,0,.5);
  opacity:.9;z-index:0}
@media(max-width:820px){.marsball{opacity:.28;right:-120px}}
/* sections */
section{padding:84px 0}
.sec-title{font-size:clamp(26px,4vw,36px);font-weight:800;margin-bottom:10px;letter-spacing:1px}
.sec-title .hl{color:var(--mars2)}
.sec-sub{color:var(--mut);margin-bottom:44px;max-width:680px}
/* stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:56px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:24px 18px;text-align:center;
  backdrop-filter:blur(6px)}
.stat b{display:block;font-size:clamp(26px,4vw,38px);font-weight:900;
  background:linear-gradient(120deg,var(--mars2),var(--mars));-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{font-size:13.5px;color:var(--mut)}
@media(max-width:720px){.stats{grid-template-columns:repeat(2,1fr)}}
/* products */
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
@media(max-width:760px){.grid2{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:30px 28px;
  transition:transform .2s,border-color .2s,box-shadow .2s;position:relative;overflow:hidden}
.card:hover{transform:translateY(-4px);border-color:rgba(255,154,60,.4);box-shadow:0 18px 44px rgba(0,0,0,.4)}
.card .icon{font-size:34px;margin-bottom:14px}
.card h3{font-size:21px;margin-bottom:8px;letter-spacing:.5px}
.card p{color:var(--mut);font-size:14.5px;margin-bottom:18px;min-height:72px}
.badge{display:inline-block;font-size:12px;font-weight:700;padding:4px 12px;border-radius:999px;margin-bottom:14px;letter-spacing:1px}
.badge.live{background:rgba(52,211,153,.14);color:#34d399;border:1px solid rgba(52,211,153,.35)}
.badge.soon{background:rgba(255,154,60,.12);color:var(--mars2);border:1px solid rgba(255,154,60,.35)}
.badge.dev{background:rgba(125,211,252,.12);color:var(--ice);border:1px solid rgba(125,211,252,.35)}
.card a.more{color:var(--mars2);text-decoration:none;font-weight:700;font-size:14.5px}
.card a.more:hover{text-decoration:underline}
/* knowledge */
.kgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media(max-width:760px){.kgrid{grid-template-columns:1fr}}
.k{background:linear-gradient(160deg,rgba(255,90,54,.08),rgba(255,255,255,.02));
  border:1px solid var(--line);border-radius:20px;padding:30px 26px}
.k .num{font-size:40px;font-weight:900;color:var(--mars2)}
.k h3{font-size:19px;margin:10px 0 8px}
.k p{color:var(--mut);font-size:14.5px}
/* about */
.about{background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.about p{color:var(--mut);max-width:760px;font-size:16px}
.about p+p{margin-top:16px}
.about strong{color:var(--txt)}
/* footer */
footer{padding:52px 0 40px;text-align:center;color:var(--mut);font-size:13.5px}
footer .flinks{margin-bottom:18px;display:flex;gap:22px;justify-content:center;flex-wrap:wrap}
footer a{color:var(--mut);text-decoration:none}
footer a:hover{color:var(--mars2)}
/* reveal */
.rv{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.rv.on{opacity:1;transform:none}

/* 登录入口 */
.navlinks a.login-link{color:#fff;background:linear-gradient(120deg,#ff5a36,#e03e1f);padding:8px 20px;border-radius:999px;font-weight:700}
.navlinks a.login-link:hover{color:#fff;filter:brightness(1.1)}