:root{
  --bg:#0a0a15;
  --card:rgba(255,255,255,0.06);
  --text:#f1f5f9;
  --accent:#00e7ff;
  --purple:#c084fc;
}

*{
  margin:0;
  padding:0;
  box-sizing:border-box;
  -webkit-tap-highlight-color:transparent;
}

body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  background:var(--bg);
  color:var(--text);
  min-height:100dvh;
  padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
  background-image:radial-gradient(circle at 50% 20%,rgba(0,231,255,0.15)0%,transparent 40%);
  overflow-x:hidden;
}

canvas{
  position:fixed;
  top:0;
  left:0;
  z-index:-1;
  opacity:0.35;
  pointer-events:none;
}

.wrapper{
  max-width:480px;
  margin:0 auto;
  padding:1.5rem;
  min-height:100dvh;
  display:flex;
  flex-direction:column;
}

header{
  text-align:center;
}

h1{
  font-size:3.5rem;
  font-weight:900;
  background:linear-gradient(90deg,#00e7ff,#c084fc);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
  line-height:1.1;
}

.tagline{
  font-size:1.28rem;
  margin:1rem 0 1.8rem;
  opacity:0.92;
}

.stats{
  font-size:0.95rem;
  opacity:0.75;
  margin-bottom:2.5rem;
}

.badges{
  display:flex;
  gap:0.8rem;
  justify-content:center;
  flex-wrap:wrap;
  margin-bottom:3rem;
}

.badge{
  font-size:0.85rem;
  padding:0.5rem 1.1rem;
  background:rgba(0,231,255,0.15);
  border:1px solid rgba(0,231,255,0.3);
  border-radius:2rem;
  backdrop-filter:blur(4px);
}

.input-card{
  background:var(--card);
  backdrop-filter:blur(20px);
  border-radius:1.8rem;
  padding:2rem;
  border:1px solid rgba(255,255,255,0.08);
  box-shadow:0 20px 40px rgba(0,0,0,0.4);
}

input{
  width:100%;
  padding:1.45rem 1.6rem;
  font-size:1.45rem;
  background:rgba(255,255,255,0.08);
  border:2px solid rgba(0,231,255,0.4);
  border-radius:1.4rem;
  color:white;
  text-align:center;
  margin-bottom:0.8rem;
  transition:all .3s;
}

input:focus{
  outline:none;
  border-color:var(--accent);
  box-shadow:0 0 0 5px rgba(0,231,255,0.25);
}

.hint{
  text-align:center;
  font-size:0.9rem;
  opacity:0.7;
  margin-bottom:1.2rem;
}

button{
  width:100%;
  padding:1.45rem;
  font-size:1.45rem;
  font-weight:800;
  background:linear-gradient(90deg,var(--accent),var(--purple));
  border:none;
  border-radius:1.4rem;
  color:white;
  cursor:pointer;
  box-shadow:0 12px 32px rgba(0,231,255,0.35);
  transition:all .3s;
  position:relative;
  overflow:hidden;
}

button:active{
  transform:scale(0.98);
}

.progress{
  height:5px;
  background:rgba(0,231,255,0.25);
  border-radius:3px;
  overflow:hidden;
  margin-top:1.6rem;
  display:none;
}

.progress-bar{
  height:100%;
  width:0%;
  background:var(--accent);
  border-radius:3px;
  transition:width .35s ease;
}

.loading-text{
  text-align:center;
  margin-top:1rem;
  font-size:1.1rem;
  color:var(--accent);
  display:none;
  min-height:1.5em;
}

.features{
  margin:4rem 0 2rem;
  display:grid;
  gap:1.5rem;
}

.feat{
  text-align:center;
  padding:1.6rem;
  background:rgba(255,255,255,0.03);
  border-radius:1.3rem;
  backdrop-filter:blur(4px);
}

.feat i{
  font-size:2.6rem;
  margin-bottom:0.9rem;
  background:linear-gradient(135deg,var(--accent),var(--purple));
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
}

footer{
  text-align:center;
  font-size:0.85rem;
  opacity:0.6;
  padding:2rem 0;
  line-height:1.6;
}

footer a{
  color:rgba(255,255,255,0.6);
  text-decoration:none;
  margin:0 0.6rem;
}

footer a:hover{
  text-decoration:underline;
}

/* -------- Modal -------- */
.modal {
  display: none;
  position: fixed;
  z-index: 9999;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(6px);
  align-items: center;
  justify-content: center;
}

.modal-content {
  width: 85%;
  max-width: 420px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  padding: 2rem;
  border-radius: 1.6rem;
  text-align: center;
  color: white;
  animation: popup .25s ease;
}

@keyframes popup {
  from { transform: scale(0.88); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.wa-button {
  display: block;
  margin: 1.4rem 0;
  background: #25D366;
  padding: 1rem 1.2rem;
  border-radius: 1.2rem;
  color: #fff;
  font-size: 1.25rem;
  font-weight: 700;
  text-decoration: none;
}

.continue-button {
  width: 100%;
  padding: 1rem;
  border-radius: 1.2rem;
  background: linear-gradient(90deg,#00e7ff,#c084fc);
  color: #fff;
  font-weight: 700;
  font-size: 1.2rem;
  border: none;
  cursor: pointer;
}

.wa-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem; /* 图标和文字间距 */
  margin: 1.4rem 0;
  background: #25D366;
  padding: 1rem 1.5rem;
  border-radius: 1.5rem;
  color: #fff;
  font-size: 1.25rem;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.3s ease;
  box-shadow: 0 6px 18px rgba(37, 211, 102, 0.35);
}

.wa-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(37, 211, 102, 0.45);
}

.wa-button i {
  font-size: 1.5rem; /* 图标大小 */
}