/* =========================================================
   入场口：登录 / 注册（门厅 + 表单 分栏）
   ========================================================= */

.gate{display:grid;grid-template-columns:1fr 1fr;min-height:76vh;margin-top:20px;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);}

.gate-hall{position:relative;background:linear-gradient(170deg,#241C16 0%,#3A2A1E 55%,#7A4A2A 100%);
  color:rgba(251,246,238,.85);padding:52px 46px;overflow:hidden;display:flex;flex-direction:column;justify-content:space-between;}
.gate-hall::before{content:"";position:absolute;left:-10%;top:-60px;width:520px;height:420px;
  background:radial-gradient(closest-side,rgba(232,163,61,.3),transparent 70%);}
.gate-hall .gh-inner{position:relative;z-index:2;}
.gh-kicker{font-size:11px;letter-spacing:.34em;color:var(--amber-2);}
.gh-title{font-family:var(--serif);font-size:clamp(26px,3vw,38px);line-height:1.35;letter-spacing:.05em;
  color:#FBF6EE;margin:16px 0 18px;}
.gh-desc{font-size:14px;line-height:2.05;color:rgba(251,246,238,.7);max-width:34ch;}
.gh-list{list-style:none;margin:26px 0 0;padding:0;font-size:13.4px;line-height:2.2;color:rgba(251,246,238,.66);}
.gh-list li{padding-left:18px;position:relative;}
.gh-list li::before{content:"";position:absolute;left:0;top:13px;width:7px;height:1px;background:var(--amber-2);}
.gh-foot{position:relative;z-index:2;font-size:12.3px;color:rgba(251,246,238,.5);line-height:1.95;}
.gh-foot a{color:var(--amber-2);text-decoration:underline;text-underline-offset:3px;}
.gh-seal{position:absolute;right:36px;bottom:34px;opacity:.9;z-index:2;}

.gate-form{background:var(--paper);padding:46px 48px;display:flex;flex-direction:column;justify-content:center;}
.gf-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:26px;}
.gf-title{font-family:var(--serif);font-size:26px;letter-spacing:.08em;}
.gf-switch{font-size:13px;color:var(--ink-3);}
.gf-switch a{color:var(--curtain);border-bottom:1px solid rgba(142,59,46,.4);padding-bottom:1px;}
.gf-back{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;color:var(--ink-3);margin-bottom:18px;}
.gf-back:hover{color:var(--curtain);}
.gf-form{max-width:400px;width:100%;}
.gf-foot{margin-top:22px;font-size:12.6px;color:var(--ink-3);line-height:2;}
.gf-foot a{color:var(--curtain);}
.gf-terms{margin-top:10px;}

@media (max-width:900px){
  .gate{grid-template-columns:1fr;}
  .gate-hall{padding:34px 26px;min-height:auto;}
  .gh-seal{display:none;}
  .gate-form{padding:32px 22px;}
}