/* 准入页 —— 沿用 style.css 的设计令牌，只补本页布局 */

.gate-body{
  min-height:100vh;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  padding:38px 18px 44px;
}
.gate-body::after{z-index:0}

.gate-wrap{
  position:relative;z-index:1;
  width:100%;max-width:520px;
  margin:auto;
}

/* ---------- 品牌行 ---------- */
.gate-brand{
  display:flex;align-items:center;
  font-weight:650;letter-spacing:.02em;font-size:13.5px;
  color:var(--ink);margin:0 0 18px 4px;
}
.gate-brand .dot{
  width:9px;height:9px;border-radius:50%;flex:0 0 auto;margin-right:10px;
  background:linear-gradient(135deg,var(--g1),var(--g2),var(--g3));
  box-shadow:0 0 0 3px rgba(255,255,255,.6);
}
.gate-brand small{
  margin-left:10px;font-weight:450;color:var(--muted);
  letter-spacing:.14em;font-size:10.5px;text-transform:uppercase;
}

/* ---------- 卡片 ---------- */
.gate-card{
  position:relative;overflow:hidden;
  border-radius:26px;
  padding:34px 32px 26px;
  background:rgba(255,255,255,.66);
  border:1px solid rgba(255,255,255,.86);
  -webkit-backdrop-filter:blur(20px) saturate(1.15);
  backdrop-filter:blur(20px) saturate(1.15);
  box-shadow:0 1px 2px rgba(21,19,15,.04),0 26px 60px -28px rgba(21,19,15,.28);
}
.gate-glow{
  position:absolute;top:-120px;right:-90px;width:340px;height:340px;
  border-radius:50%;pointer-events:none;
  background:radial-gradient(closest-side,rgba(201,184,255,.42),rgba(201,184,255,0) 72%);
  filter:blur(6px);
}
.gate-card > *{position:relative}
.gate-card > .gate-glow{position:absolute}

.gate-eyebrow{
  margin:0 0 12px;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.22em;
  text-transform:uppercase;color:var(--faint);
}
.gate-title{
  margin:0;
  font-size:27px;line-height:1.32;letter-spacing:-.015em;font-weight:680;color:var(--ink);
}
.gate-title span{color:var(--ink2);font-weight:560}
.gate-sub{
  margin:14px 0 0;
  font-size:13.2px;line-height:1.78;color:var(--muted);
}

/* ---------- 规则 ---------- */
.gate-rules{
  margin:22px 0 0;padding:4px 0 0;
  border-top:1px solid rgba(21,19,15,.07);
}
.rule{
  display:flex;align-items:flex-start;
  padding:13px 0 12px;
  border-bottom:1px solid rgba(21,19,15,.055);
}
.rule:last-child{border-bottom:0}
.rule i{
  flex:0 0 auto;width:26px;
  font-family:var(--mono);font-style:normal;
  font-size:10.5px;font-weight:600;letter-spacing:.06em;
  color:var(--acc);padding-top:3px;
}
.rule b{
  display:block;font-size:13px;font-weight:640;color:var(--ink);line-height:1.5;
}
.rule span{
  display:block;margin-top:4px;
  font-size:12px;line-height:1.66;color:var(--faint);
}

/* ---------- 表单 ---------- */
.gate-form{margin:24px 0 0}
.gate-label{
  display:block;font-size:11.5px;font-weight:600;letter-spacing:.1em;
  color:var(--muted);text-transform:uppercase;margin:0 0 9px 2px;
}
.gate-field{
  display:flex;align-items:center;
  background:rgba(255,255,255,.92);
  border:1.5px solid rgba(21,19,15,.12);
  border-radius:16px;
  padding:5px 5px 5px 6px;
  transition:border-color .22s,box-shadow .22s,background .22s;
}
.gate-field:focus-within{
  border-color:rgba(110,91,199,.62);
  background:#fff;
  box-shadow:0 0 0 4px rgba(142,118,232,.13);
}
.gate-field.err{
  border-color:rgba(192,85,63,.6);
  box-shadow:0 0 0 4px rgba(192,85,63,.09);
  animation:gateShake .34s cubic-bezier(.36,.07,.19,.97);
}
.gate-field.ok{border-color:rgba(46,140,113,.6);box-shadow:0 0 0 4px rgba(46,140,113,.10)}
@keyframes gateShake{
  0%,100%{transform:translateX(0)}
  22%{transform:translateX(-5px)}
  46%{transform:translateX(4px)}
  70%{transform:translateX(-2px)}
  88%{transform:translateX(1px)}
}

#codeInput{
  flex:1 1 auto;min-width:0;
  border:0;background:transparent;outline:none;
  font-family:var(--mono);
  font-size:16px;font-weight:600;letter-spacing:.13em;
  color:var(--ink);
  padding:12px 10px 12px 12px;
  text-transform:uppercase;
}
#codeInput::placeholder{
  color:#BDB6A8;letter-spacing:.13em;font-weight:500;
}
.gate-submit{
  flex:0 0 auto;
  padding:13px 24px;
  font-size:13.5px;
  box-shadow:0 6px 14px -8px rgba(21,19,15,.55);
}
.gate-submit:hover{box-shadow:0 8px 18px -8px rgba(21,19,15,.6)}
.gate-submit[disabled]{opacity:.55;cursor:progress}

.gate-msg{
  min-height:19px;margin:10px 2px 0;
  font-size:12.2px;line-height:1.6;color:var(--warn);
}
.gate-msg.ok{color:var(--ok)}
.gate-msg b{font-family:var(--mono);font-weight:650}

.gate-foot{
  margin:18px 0 0;padding-top:16px;
  border-top:1px solid rgba(21,19,15,.06);
  font-size:11.5px;line-height:1.8;color:var(--faint);
}
.gate-legal{
  margin:16px 0 0;text-align:center;
  font-size:11px;color:var(--faint);line-height:1.7;
}

/* ---------- 移动端 ---------- */
@media (max-width:600px){
  .gate-body{padding:24px 14px 30px;justify-content:flex-start}
  .gate-wrap{margin-top:6px}
  .gate-brand{margin:0 0 14px 2px;font-size:12.5px}
  .gate-brand small{font-size:9.5px;letter-spacing:.12em}
  .gate-card{border-radius:22px;padding:26px 20px 20px}
  .gate-title{font-size:23px;line-height:1.36}
  .gate-sub{font-size:12.6px;margin-top:12px}
  .gate-rules{margin-top:18px}
  .rule{padding:12px 0}
  .rule b{font-size:12.5px}
  .rule span{font-size:11.6px}
  .gate-form{margin-top:20px}
  .gate-field{
    display:block;background:transparent;border:0;box-shadow:none;
    padding:0;border-radius:0;
  }
  .gate-field:focus-within{background:transparent;border-color:transparent;box-shadow:none}
  .gate-field.err{box-shadow:none;border-color:transparent}
  #codeInput{
    width:100%;display:block;
    text-align:center;padding:15px 10px;font-size:17px;
    border:1.5px solid rgba(21,19,15,.12);
    border-radius:14px;
    background:rgba(255,255,255,.92);
    transition:border-color .2s,box-shadow .2s,background .2s;
  }
  #codeInput:focus{
    border-color:rgba(110,91,199,.6);
    background:#fff;
    box-shadow:0 0 0 4px rgba(142,118,232,.13);
  }
  .gate-field.err #codeInput{
    border-color:rgba(192,85,63,.6);
    box-shadow:0 0 0 4px rgba(192,85,63,.09);
  }
  .gate-field.ok #codeInput{border-color:rgba(46,140,113,.6);box-shadow:0 0 0 4px rgba(46,140,113,.10)}
  .gate-submit{width:100%;margin-top:10px;padding:15px}
  .gate-foot{font-size:11px;line-height:1.75}
}

@media (prefers-reduced-motion: reduce){
  .gate-field.err{animation:none}
}