/* ============================================================
   NEXA 诺瓦数字 · 注册页样式
   移动优先 / 零依赖 / 仅 transform+opacity 动画
   ============================================================ */

:root{
  --bg:#04070f;
  --bg-2:#080d1a;
  --line:rgba(120,180,255,.13);
  --line-2:rgba(120,180,255,.28);
  --txt:#e8f1ff;
  --txt-2:#8fa3c4;
  --txt-3:#5d6f8f;
  --cy:#22e6ff;
  --vi:#7b5cff;
  --gr:#2bff9e;
  --rd:#ff5c7a;
  --r:16px;
  --safe-b:env(safe-area-inset-bottom,0px);
  --safe-t:env(safe-area-inset-top,0px);
}

*,*::before,*::after{box-sizing:border-box}

html{-webkit-text-size-adjust:100%}

body{
  margin:0;
  min-height:100svh;
  background:var(--bg);
  color:var(--txt);
  font:400 15px/1.55 -apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB",
       "Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  overscroll-behavior-y:contain;
}

img,svg{display:block}
button,input{font:inherit;color:inherit}

/* ------------------------------ 背景特效 ------------------------------ */

.fx{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}

.fx-grid{
  position:absolute;inset:-20%;
  background-image:
    linear-gradient(rgba(80,180,255,.055) 1px,transparent 1px),
    linear-gradient(90deg,rgba(80,180,255,.055) 1px,transparent 1px);
  background-size:52px 52px;
  transform:perspective(700px) rotateX(52deg) translateY(12%);
  transform-origin:50% 0;
  mask-image:linear-gradient(#000 0%,transparent 62%);
  -webkit-mask-image:linear-gradient(#000 0%,transparent 62%);
  animation:gridMove 9s linear infinite;
}
@keyframes gridMove{to{background-position:0 52px,0 0}}

.fx-glow{position:absolute;border-radius:50%;filter:blur(70px);opacity:.5}
.fx-glow--a{width:280px;height:280px;top:-90px;left:-70px;
  background:radial-gradient(circle,#0e7f9e,transparent 70%);
  animation:float1 11s ease-in-out infinite}
.fx-glow--b{width:300px;height:300px;top:36%;right:-110px;
  background:radial-gradient(circle,#4b2fb0,transparent 70%);
  animation:float2 13s ease-in-out infinite}
@keyframes float1{50%{transform:translate3d(26px,30px,0) scale(1.14)}}
@keyframes float2{50%{transform:translate3d(-24px,-30px,0) scale(1.1)}}

.fx-scan{
  position:absolute;inset:0;
  background:repeating-linear-gradient(0deg,rgba(255,255,255,.022) 0 1px,transparent 1px 3px);
  opacity:.5;
}

/* ------------------------------- 布局 -------------------------------- */

.shell{
  position:relative;z-index:1;
  width:100%;max-width:460px;margin:0 auto;
  padding:calc(var(--safe-t) + 16px) 18px calc(var(--safe-b) + 26px);
  display:flex;flex-direction:column;gap:20px;
}

/* ------------------------------- 顶栏 -------------------------------- */

.top{display:flex;align-items:center;justify-content:space-between;gap:10px}

.brand{display:flex;align-items:center;gap:8px;min-width:0}
.brand-mark{width:26px;height:26px;flex:none}
.brand-name{font-size:16px;font-weight:800;letter-spacing:.14em;
  background:linear-gradient(92deg,#fff,#9ad8ff);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.brand-sub{font-size:11px;color:var(--txt-3);letter-spacing:.06em;
  padding-left:8px;border-left:1px solid var(--line)}
.brand-chip{margin-left:2px;font-size:9.5px;letter-spacing:.08em;color:var(--cy);
  padding:3px 7px;border:1px solid rgba(34,230,255,.26);border-radius:6px;
  background:rgba(34,230,255,.07);white-space:nowrap}

.pulse{display:flex;align-items:center;gap:5px;font-size:10px;letter-spacing:.12em;
  color:var(--gr);padding:4px 9px;border:1px solid rgba(43,255,158,.28);border-radius:999px;
  background:rgba(43,255,158,.07);flex:none}
.pulse i{width:5px;height:5px;border-radius:50%;background:var(--gr);
  box-shadow:0 0 8px var(--gr);animation:blink 1.6s ease-in-out infinite}
@keyframes blink{50%{opacity:.25}}

/* ------------------------------ 赠送区 ------------------------------- */

.hero{text-align:center}

.tagline{
  display:inline-block;font-size:10px;letter-spacing:.22em;color:var(--cy);
  padding:5px 12px;border:1px solid rgba(34,230,255,.26);border-radius:999px;
  background:rgba(34,230,255,.07);margin-bottom:16px;
}

.gift{position:relative;display:inline-flex;align-items:baseline;gap:4px;
  padding:6px 4px;filter:drop-shadow(0 0 26px rgba(34,230,255,.3))}
.gift-cur{font-size:26px;font-weight:700;color:var(--cy);margin-right:-2px}
.gift-num{font-size:78px;line-height:1;font-weight:800;letter-spacing:-.03em;
  font-family:ui-monospace,SFMono-Regular,Menlo,"SF Mono",monospace;
  background:linear-gradient(180deg,#fff 20%,#7fe4ff 62%,#22e6ff);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  animation:glowPulse 2.6s ease-in-out infinite}
@keyframes glowPulse{50%{filter:brightness(1.22)}}
.gift-unit{font-size:15px;font-weight:700;color:var(--txt-2);letter-spacing:.06em}

.gift-shine{position:absolute;inset:0;border-radius:12px;overflow:hidden;pointer-events:none}
.gift-shine::after{
  content:"";position:absolute;top:-60%;left:-70%;width:45%;height:220%;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.3),transparent);
  transform:rotate(14deg);animation:shine 3.4s ease-in-out infinite;
}
@keyframes shine{0%,62%{left:-70%}100%{left:130%}}

.headline{margin:10px 0 16px;font-size:24px;line-height:1.32;font-weight:800;letter-spacing:-.01em}
.headline em{font-style:normal;font-size:13px;font-weight:500;color:var(--txt-2);
  letter-spacing:.02em;margin-top:4px;display:inline-block}

.perks{list-style:none;margin:0 0 20px;padding:0;display:flex;flex-wrap:wrap;
  justify-content:center;gap:7px}
.perks li{font-size:11px;color:var(--txt-2);padding:5px 11px;
  border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.03)}
.perks i{font-style:normal;color:var(--gr);margin-right:4px}

.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.stat{padding:11px 6px;border:1px solid var(--line);border-radius:12px;
  background:linear-gradient(180deg,rgba(255,255,255,.045),rgba(255,255,255,.012))}
.stat b{display:block;font-size:18px;font-weight:800;color:#fff;
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.stat b small{font-size:9px;color:var(--cy);font-weight:700}
.stat span{display:block;margin-top:2px;font-size:10px;color:var(--txt-3)}

/* ------------------------------- 表单 -------------------------------- */

.panel{
  position:relative;border-radius:20px;padding:20px 18px;
  border:1px solid var(--line-2);
  background:linear-gradient(170deg,rgba(16,26,48,.9),rgba(8,13,26,.94));
  box-shadow:0 22px 60px -24px rgba(0,0,0,.9),
             inset 0 1px 0 rgba(255,255,255,.07);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
}
.panel::before{
  content:"";position:absolute;inset:0;border-radius:20px;padding:1px;pointer-events:none;
  background:linear-gradient(150deg,rgba(34,230,255,.5),transparent 42%,rgba(123,92,255,.42));
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;
}

#signup{display:flex;flex-direction:column;gap:14px}
#signup[hidden]{display:none}

.field{display:block}
.field-label{display:flex;align-items:baseline;gap:7px;margin:0 0 6px 2px;
  font-size:12px;font-weight:600;color:var(--txt)}
.field-label em{font-style:normal;font-size:10px;font-weight:400;color:var(--txt-3)}
.field-label em.opt{color:var(--cy)}

.field-box{position:relative;display:flex;align-items:center}
.field-box input{
  width:100%;height:48px;padding:0 44px 0 14px;
  border:1px solid var(--line);border-radius:12px;
  background:rgba(3,7,16,.66);
  font-size:15px;letter-spacing:.02em;outline:none;
  transition:border-color .18s,box-shadow .18s,background .18s;
}
.field-box input::placeholder{color:var(--txt-3);font-size:13px}
.field-box input:focus{
  border-color:rgba(34,230,255,.6);background:rgba(6,14,28,.9);
  box-shadow:0 0 0 3px rgba(34,230,255,.12);
}
.field-box.bad input{border-color:rgba(255,92,122,.65);box-shadow:0 0 0 3px rgba(255,92,122,.1)}

.field-ico{position:absolute;right:14px;font-style:normal;font-size:13px;
  color:var(--txt-3);pointer-events:none;font-family:ui-monospace,Menlo,monospace}
.field-act{position:absolute;right:6px;width:38px;height:38px;border:0;border-radius:10px;
  background:none;color:var(--txt-3);font-size:13px;cursor:pointer}
.field-act.on{color:var(--cy)}

.field-err{display:block;min-height:0;font-size:11px;color:var(--rd);margin:5px 0 0 3px}
.field-err:empty{display:none}

.meter{display:block;height:3px;margin-top:8px;border-radius:2px;
  background:rgba(255,255,255,.07);overflow:hidden}
.meter i{display:block;height:100%;width:0;border-radius:2px;
  background:var(--rd);transition:width .3s ease,background .3s ease}
.meter-txt{display:block;font-size:10px;color:var(--txt-3);margin:4px 0 0 3px}

/* ------------------------------ 按钮 --------------------------------- */

.cta{
  position:relative;display:flex;align-items:center;justify-content:center;gap:8px;
  width:100%;height:52px;margin-top:4px;padding:0 18px;
  border:0;border-radius:14px;overflow:hidden;
  font-size:16px;font-weight:800;letter-spacing:.04em;color:#02121a;text-decoration:none;
  background:linear-gradient(96deg,#22e6ff,#7bd8ff 46%,#8f7bff);
  box-shadow:0 12px 30px -12px rgba(34,230,255,.65);
  cursor:pointer;transition:transform .14s ease,box-shadow .14s ease,filter .14s ease;
}
.cta:active{transform:translateY(1px) scale(.985);filter:brightness(.94)}
.cta[disabled]{opacity:.5;pointer-events:none;filter:saturate(.4)}
.cta-arrow{transition:transform .2s ease}
.cta:hover .cta-arrow{transform:translateX(4px)}
.cta::after{
  content:"";position:absolute;top:0;left:-60%;width:40%;height:100%;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.55),transparent);
  animation:ctaShine 3s ease-in-out infinite;
}
@keyframes ctaShine{0%,58%{left:-60%}100%{left:130%}}
.cta.ghost{background:none;color:var(--cy);border:1px solid rgba(34,230,255,.45);
  box-shadow:none;font-size:14px;font-weight:600}
.cta.ghost::after{display:none}

.fine{margin:12px 0 0;font-size:10.5px;line-height:1.6;color:var(--txt-3);text-align:center}
.fine a{color:var(--txt-2);text-decoration:none;border-bottom:1px dashed var(--line-2)}

/* --------------------------- 风控校验动画 ----------------------------- */

.verify{display:flex;flex-direction:column;align-items:center;gap:12px;padding:6px 0 2px}
.verify[hidden],.done[hidden]{display:none}

.v-ring{position:relative;width:120px;height:120px}
.v-ring svg{width:100%;height:100%;transform:rotate(-90deg)}
.v-track{fill:none;stroke:rgba(255,255,255,.07);stroke-width:6}
.v-fill{fill:none;stroke:var(--cy);stroke-width:6;stroke-linecap:round;
  stroke-dasharray:326.7;stroke-dashoffset:326.7;
  filter:drop-shadow(0 0 8px rgba(34,230,255,.75));transition:stroke-dashoffset .28s linear}
.v-num{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;gap:1px}
.v-num b{font-size:30px;font-weight:800;font-family:ui-monospace,Menlo,monospace;color:#fff}
.v-num span{font-size:12px;color:var(--txt-3);margin-top:8px}

.v-phase{font-size:14px;font-weight:700;letter-spacing:.03em;text-align:center;
  min-height:20px;color:var(--cy)}

.v-log{list-style:none;width:100%;margin:0;padding:11px 12px;border-radius:12px;
  border:1px solid var(--line);background:rgba(2,6,14,.6);
  font-family:ui-monospace,SFMono-Regular,Menlo,"SF Mono",monospace;font-size:10.5px;
  min-height:96px;max-height:96px;overflow:hidden}
.v-log li{display:flex;gap:7px;padding:2.5px 0;color:var(--txt-3);opacity:0;
  animation:logIn .3s ease forwards;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
@keyframes logIn{to{opacity:1}}
.v-log li .t{color:var(--txt-3);flex:none}
.v-log li .m{color:var(--txt-2);overflow:hidden;text-overflow:ellipsis}
.v-log li.ok .m{color:var(--gr)}
.v-log li.run .m{color:var(--cy)}
.v-log li .x{color:var(--gr);flex:none}

.v-note{margin:0;text-align:center;font-size:11px;color:var(--txt-3);line-height:1.6}
.v-note small{font-size:10px;opacity:.8}

.v-eta{width:100%;height:2px;border-radius:2px;background:rgba(255,255,255,.07);overflow:hidden}
.v-eta i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--cy),var(--vi))}

/* ---------------------------- 成功页面 ------------------------------- */

.done{display:flex;flex-direction:column;align-items:center;gap:12px;
  animation:doneIn .45s cubic-bezier(.2,.9,.3,1.2) both}
@keyframes doneIn{from{opacity:0;transform:translateY(14px) scale(.97)}}

.done-badge{width:62px;height:62px}
.done-badge svg{width:100%;height:100%}
.d-circle{fill:rgba(43,255,158,.1);stroke:var(--gr);stroke-width:2.5;
  stroke-dasharray:151;stroke-dashoffset:151;animation:draw .5s .1s ease forwards}
.d-tick{fill:none;stroke:var(--gr);stroke-width:3.4;stroke-linecap:round;stroke-linejoin:round;
  stroke-dasharray:40;stroke-dashoffset:40;animation:draw .35s .5s ease forwards}
@keyframes draw{to{stroke-dashoffset:0}}

.done h2{margin:0;font-size:21px;font-weight:800}
.done-sub{margin:0;font-size:12px;color:var(--txt-2)}

.sheet{width:100%;margin:4px 0 6px;padding:4px 14px;border-radius:14px;
  border:1px solid var(--line);background:rgba(2,6,14,.5)}
.sheet div{display:flex;align-items:center;justify-content:space-between;
  gap:12px;padding:9px 0;border-bottom:1px solid rgba(255,255,255,.045)}
.sheet div:last-child{border-bottom:0}
.sheet dt{font-size:11.5px;color:var(--txt-3);flex:none}
.sheet dd{margin:0;font-size:12.5px;font-weight:600;text-align:right;
  font-family:ui-monospace,Menlo,monospace;word-break:break-all}
.sheet dd.up{color:var(--gr)}
.sheet dd.ok{color:var(--gr);letter-spacing:.08em}

/* ------------------------------ 页脚 --------------------------------- */

.foot{margin-top:auto;padding-top:8px;display:flex;flex-wrap:wrap;justify-content:center;
  gap:7px;font-size:10px;color:var(--txt-3);text-align:center}
.dot{opacity:.5}

/* ------------------------- 桌面端拦截（前端兜底） ---------------------- */

.gate{display:none}

@media (min-width:820px),(min-height:900px) and (min-width:640px){
  body.gated>.fx,body.gated>.shell{display:none}
  body.gated{
    display:grid;place-items:center;min-height:100vh;padding:24px;
    background:var(--bg)
  }
  body.gated>.gate{
    display:flex;flex-direction:column;align-items:center;gap:16px;
    max-width:360px;text-align:center
  }
  .gate-ring{width:104px;height:104px;border-radius:50%;display:grid;place-items:center;
    border:1px dashed rgba(34,230,255,.4);background:rgba(34,230,255,.05);
    color:var(--cy);animation:spin 9s linear infinite}
  @keyframes spin{to{transform:rotate(360deg)}}
  .gate-ring svg{width:44px;height:44px;animation:spin 9s linear infinite reverse}
  .gate h2{margin:0;font-size:20px}
  .gate p{margin:0;font-size:13px;color:var(--txt-2);line-height:1.7}
  .gate code{display:inline-block;margin-top:4px;padding:3px 9px;border-radius:7px;
    background:rgba(255,255,255,.06);font-size:11px;color:var(--cy);
    word-break:break-all;font-family:ui-monospace,Menlo,monospace}
  .gate small{font-size:11px;color:var(--txt-3)}
}

/* --------------------------- 无障碍 / 性能 ---------------------------- */

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .gift-num{color:#8fe9ff}
}

@media (max-width:340px){
  .gift-num{font-size:64px}
  .headline{font-size:21px}
  .shell{padding-left:14px;padding-right:14px}
}