:root{
  --bg:#070b1c;
  --bg-2:#0d1530;
  --card:rgba(255,255,255,.04);
  --line:rgba(255,255,255,.10);
  --txt:#eef1ff;
  --sub:#a8b0d0;
  --pri:#7c5cff;
  --cyan:#22d3ee;
  --green:#2ecc71;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--txt);
  background:radial-gradient(1200px 700px at 80% -10%,#1a1a4e 0%,transparent 60%),
            radial-gradient(900px 600px at -10% 20%,#0e2a3a 0%,transparent 55%),
            linear-gradient(180deg,#070b1c 0%,#0a1026 100%);
  min-height:100vh;
  overflow-x:hidden;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
#sky{position:fixed;inset:0;z-index:-1;display:block;pointer-events:none}
.container{max-width:1080px;margin:0 auto;padding:0 20px}
a{color:inherit;text-decoration:none}
ul{list-style:none}

/* ============ 导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:50;
  transition:background .25s,backdrop-filter .25s,border-color .25s,transform .3s;
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(7,11,28,.72);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border-bottom-color:var(--line);
}
.nav-wrap{display:flex;align-items:center;gap:18px;height:62px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:.5px;font-size:17px}
.logo-mark{
  width:32px;height:32px;border-radius:9px;
  background:linear-gradient(135deg,var(--pri),var(--cyan));
  display:grid;place-items:center;
  box-shadow:0 6px 18px -6px rgba(124,92,255,.7);
  overflow:hidden;flex:none;
}
.logo-mark img{width:100%;height:100%;object-fit:cover;display:block}
.nav{display:flex;gap:8px;margin-left:auto}
.nav a{
  padding:8px 14px;border-radius:999px;font-size:14.5px;color:var(--sub);
  transition:color .2s,background .2s;
}
.nav a:hover{color:var(--txt);background:rgba(255,255,255,.06)}
.nav-toggle{display:none;background:none;border:none;color:var(--txt);font-size:22px;cursor:pointer;padding:6px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:12px 24px;border-radius:12px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;
  transition:transform .15s,box-shadow .2s,background .2s,border-color .2s;
  white-space:nowrap;
}
.btn:active{transform:scale(.97)}
.btn-primary{
  background:linear-gradient(135deg,var(--pri),var(--cyan));
  color:#fff;box-shadow:0 10px 28px -10px rgba(124,92,255,.75);
}
.btn-primary:hover{box-shadow:0 16px 34px -10px rgba(34,211,238,.7);filter:brightness(1.06)}
.btn-ghost{border-color:var(--line);color:var(--txt);background:rgba(255,255,255,.03)}
.btn-ghost:hover{background:rgba(255,255,255,.09);border-color:rgba(255,255,255,.25)}
.btn-sm{padding:8px 16px;font-size:13.5px;border-radius:9px}

/* ============ 首屏 ============ */
.hero{min-height:100vh;display:grid;place-items:center;padding:120px 0 80px;text-align:center;position:relative}
.hero-inner{max-width:720px}
.badge{
  display:inline-block;padding:6px 16px;border-radius:999px;font-size:13px;
  background:rgba(124,92,255,.14);border:1px solid rgba(124,92,255,.35);
  color:#c9b8ff;margin-bottom:22px;
}
.hero h1{
  font-size:clamp(38px,8vw,72px);line-height:1.05;letter-spacing:-1px;
  background:linear-gradient(120deg,#fff 10%,#c4b5ff 45%,#5eead4 85%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  margin-bottom:18px;
}
.sub{color:var(--sub);font-size:clamp(15px,2.4vw,18px);margin-bottom:30px}
.hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:56px}
.stats{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.stats div{
  min-width:120px;padding:16px 22px;border-radius:16px;
  background:var(--card);border:1px solid var(--line);backdrop-filter:blur(6px);
}
.stats strong{display:block;font-size:30px;background:linear-gradient(120deg,var(--pri),var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent}
.stats span{font-size:13px;color:var(--sub)}

/* ============ 通用区块 ============ */
.section{padding:90px 0}
.section-head{text-align:center;margin-bottom:44px}
.section-head h2{font-size:clamp(26px,5vw,40px);margin-bottom:10px;letter-spacing:-.5px}
.section-head p{color:var(--sub);font-size:15.5px}

/* ============ 应用卡片 ============ */
.apps{display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));gap:22px}
.app-card{
  position:relative;padding:24px;border-radius:20px;
  background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  border:1px solid var(--line);
  transition:transform .25s,border-color .25s,box-shadow .25s;
  display:flex;flex-direction:column;gap:12px;
}
.app-card:hover{transform:translateY(-6px);border-color:rgba(124,92,255,.5);box-shadow:0 24px 50px -24px rgba(124,92,255,.5)}
.app-header{display:flex;align-items:center;gap:14px}
.app-icon{
  width:50px;height:50px;border-radius:14px;flex:none;
  display:grid;place-items:center;font-size:22px;font-weight:800;color:#fff;
  background:linear-gradient(135deg,var(--pri),var(--cyan));
  box-shadow:0 10px 22px -8px rgba(124,92,255,.7);
}
.app-title-row{display:flex;flex-direction:column;gap:4px;align-items:flex-start}
.app-card h3{font-size:19px;letter-spacing:.3px}
.tag{padding:2px 10px;border-radius:999px;font-size:11.5px;font-weight:600;letter-spacing:.3px}
.tag-dev{background:rgba(245,158,11,.16);color:#fbbf24;border:1px solid rgba(245,158,11,.35)}
.tag-live{background:rgba(46,204,113,.16);color:#5eead4;border:1px solid rgba(46,204,113,.4)}
.app-desc{color:var(--sub);font-size:14.5px}
.app-meta{display:flex;flex-wrap:wrap;gap:6px;font-size:12.5px;color:var(--sub);padding-top:4px;border-top:1px dashed var(--line)}
.app-actions{display:flex;gap:10px;margin-top:auto;padding-top:6px}
.app-card.soon{
  align-items:center;text-align:center;justify-content:center;
  background:repeating-linear-gradient(135deg,rgba(255,255,255,.03),rgba(255,255,255,.03) 12px,rgba(255,255,255,.06) 12px,rgba(255,255,255,.06) 24px);
  border-style:dashed;min-height:230px;
}
.app-card.soon p{color:var(--sub);font-size:14px}

/* ============ 关于 ============ */
.about-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px}
.about-card{
  padding:24px;border-radius:18px;background:var(--card);border:1px solid var(--line);
  transition:transform .25s,border-color .25s;
}
.about-card:hover{transform:translateY(-4px);border-color:rgba(34,211,238,.4)}
.about-card h3{font-size:17px;margin-bottom:10px}
.about-card p{color:var(--sub);font-size:14.5px}
.contact-list{display:flex;flex-direction:column;gap:10px;margin-top:4px}
.contact-list li{display:flex;align-items:center;gap:10px;font-size:14.5px}
.ct-label{
  flex:none;width:52px;padding:3px 8px;border-radius:7px;font-size:12px;text-align:center;
  background:rgba(124,92,255,.16);color:#c9b8ff;border:1px solid rgba(124,92,255,.3);
}
.ct-val{color:var(--txt);word-break:break-all}
.ct-val[style*="cursor"]{transition:color .2s}
.ct-val[style*="cursor"]:hover{color:var(--cyan)}
a.ct-val:hover{text-decoration:underline}

/* ============ 页脚 ============ */
.site-footer{padding:26px 0;border-top:1px solid var(--line);margin-top:20px}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:13.5px;color:var(--sub)}
.footer-logo{display:flex;align-items:center;gap:8px;font-weight:700;color:var(--txt)}
.footer-logo .logo-mark{width:24px;height:24px;border-radius:7px}

/* ============ Toast ============ */
.toast{
  position:fixed;left:50%;bottom:28px;transform:translate(-50%,16px);z-index:99;
  padding:11px 20px;border-radius:12px;font-size:14px;color:#fff;
  background:rgba(15,20,45,.94);border:1px solid var(--line);
  backdrop-filter:blur(10px);box-shadow:0 16px 40px -12px rgba(0,0,0,.6);
  opacity:0;visibility:hidden;transition:opacity .25s,transform .25s,visibility .25s;
  max-width:min(88vw,460px);text-align:center;line-height:1.5;
}
.toast.is-show{opacity:1;visibility:visible;transform:translate(-50%,0)}

/* ============ 滚动出现 ============ */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s cubic-bezier(.2,.7,.3,1),transform .6s cubic-bezier(.2,.7,.3,1)}
.reveal.is-visible{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media (max-width:640px){
  .nav{
    position:fixed;inset:62px 0 auto;flex-direction:column;align-items:stretch;
    background:rgba(7,11,28,.96);backdrop-filter:blur(16px);
    padding:14px 18px;gap:6px;border-bottom:1px solid var(--line);
    transform:translateY(-110%);transition:transform .3s;
  }
  .nav.is-open{transform:translateY(0)}
  .nav a{padding:13px 16px;border-radius:11px;font-size:15.5px}
  .nav-toggle{display:block;margin-left:auto}
  .section{padding:64px 0}
  .hero{padding-top:100px}
  .stats div{min-width:100px;padding:13px 16px}
}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}