/* 登录 / 主账号注册 — 色板、字体、左侧视觉对齐官网 Hero */
:root{
  --bg:#ffffff;
  --surface:#fafbfc;
  --border:#eef2f6;
  --muted:#dbe3ec;
  --primary:#8b5cf6;
  --primary-strong:#7c3aed;
  --primary-deep:#6d28d9;
  --ink:#1e293b;
  --ink-2:#64748b;
  --ink-3:#94a3b8;
  --danger:#dc2626;
  --radius:8px;
  --shadow-sm:0 1px 2px rgba(15,23,42,.03);
  --shadow-md:0 2px 12px -4px rgba(15,23,42,.06);
  --font-sans:Inter, system-ui, -apple-system, "Segoe UI", "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono:ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;height:100%}
body{
  margin:0;min-height:100%;
  background:var(--bg);color:var(--ink);
  font-family:var(--font-sans);
  font-size:16px;line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
h1,h2{margin:0;line-height:1.15;letter-spacing:-.02em;font-weight:800}
p{margin:0}
:focus-visible{outline:2px solid var(--primary-strong);outline-offset:2px;border-radius:4px}

.container{width:min(1180px,calc(100% - 48px));margin-inline:auto}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  min-height:48px;padding:0 24px;
  border-radius:var(--radius);border:1px solid transparent;
  font-weight:650;font-size:.98rem;cursor:pointer;
  transition:background-color .18s ease,border-color .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn-primary{background:var(--primary-strong);color:#fff;box-shadow:var(--shadow-md)}
.btn-primary:hover{background:var(--primary-deep)}
.btn-primary:active{transform:translateY(1px)}
.btn-primary:disabled{opacity:.55;cursor:not-allowed;transform:none;box-shadow:none}
.btn-ghost{background:var(--bg);color:var(--ink);border-color:var(--border)}
.btn-ghost:hover{background:var(--surface);border-color:var(--muted)}
.btn-block{width:100%}

/* header — 对齐官网 */
header.site{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.86);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border);
}
.nav{display:flex;align-items:center;gap:28px;min-height:70px;position:relative}
.brand{display:flex;align-items:center;gap:11px;font-weight:750;font-size:1.02rem;letter-spacing:-.01em}
.brand img{width:30px;height:30px;border-radius:8px;flex:none;object-fit:contain;display:block;background:transparent}
.brand-mark{
  width:30px;height:30px;border-radius:8px;flex:none;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--primary-strong);color:#fff;font-size:14px;font-weight:800;
}
.brand small{display:block;font-size:.7rem;font-weight:600;color:var(--ink-3);letter-spacing:.06em}
.nav-links{display:flex;gap:4px;margin-left:auto}
.nav-links a{
  padding:9px 13px;border-radius:var(--radius);
  font-size:.92rem;font-weight:600;color:var(--ink-2);
  transition:background-color .16s ease,color .16s ease;
}
.nav-links a:hover{background:var(--surface);color:var(--ink)}
.nav-links a.nav-promo{display:inline-flex;align-items:center;gap:6px}
.nav-links a.nav-promo .nav-coin{
  width:22px;height:22px;flex-shrink:0;position:relative;overflow:hidden;border-radius:50%;
  background:url(/assets/nav-coin.png?v=4) center/contain no-repeat;
}
.nav-links a.nav-promo .nav-coin::after{
  content:"";position:absolute;inset:-40% -60%;
  background:linear-gradient(115deg,transparent 38%,rgba(255,255,255,.85) 50%,transparent 62%);
  animation:nav-coin-shine 2.4s ease-in-out infinite;
}
@keyframes nav-coin-shine{
  0%,50%{transform:translateX(-75%) rotate(12deg)}
  72%,100%{transform:translateX(75%) rotate(12deg)}
}
@media (prefers-reduced-motion:reduce){
  .nav-links a.nav-promo .nav-coin::after{animation:none;opacity:0}
}
.nav-actions{display:flex;align-items:center;gap:8px;flex-shrink:0}
.nav-actions .btn{min-height:42px;padding:0 16px;font-size:.9rem}
.nav-actions .btn-ghost{background:transparent}
.nav-toggle{
  display:none;margin-left:8px;width:44px;height:44px;
  border:1px solid var(--border);border-radius:var(--radius);
  background:var(--bg);cursor:pointer;align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:8px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:8px;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

@media (max-width:820px){
  .container{width:min(1180px,calc(100% - 32px))}
  .nav-links{
    display:none;position:absolute;top:70px;left:0;right:0;
    background:var(--bg);border-bottom:1px solid var(--border);
    flex-direction:column;padding:12px 16px 18px;gap:2px;box-shadow:var(--shadow-md);
  }
  .nav-links.open{display:flex}
  .nav-toggle{display:flex}
  .nav-actions .btn{min-height:40px;padding:0 12px;font-size:.85rem}
}

/* ---------- 左右分栏 ---------- */
.auth-shell{
  --auth-gutter:max(24px, calc((100vw - min(1180px, calc(100vw - 48px))) / 2));
  min-height:calc(100vh - 70px);
  display:grid;
  grid-template-columns:1.05fr .95fr;
  border-top:0;
}

/* 左侧：复用官网 Hero 浅色氛围 + 背景动效；内容左缘与导航对齐 */
.auth-brand{
  position:relative;
  overflow:hidden;
  isolation:isolate;
  padding:48px 48px 56px var(--auth-gutter);
  display:flex;
  flex-direction:column;
  justify-content:center;
  min-height:560px;
  border-right:1px solid var(--border);
  background:linear-gradient(180deg,var(--surface),var(--bg) 72%);
  color:var(--ink);
}
.auth-brand::before{
  content:"";
  position:absolute;inset:-12% -8%;z-index:0;
  background:
    radial-gradient(800px 500px at 88% -12%, rgba(139,92,246,.26), transparent 62%),
    radial-gradient(640px 420px at 0% 10%, rgba(139,92,246,.10), transparent 60%),
    radial-gradient(420px 320px at 55% 70%, rgba(139,92,246,.08), transparent 65%);
  animation:heroGlowDrift 18s ease-in-out infinite alternate;
  will-change:transform;
  pointer-events:none;
}
.auth-brand::after{
  content:"";
  position:absolute;inset:0;z-index:0;
  background-image:
    linear-gradient(rgba(139,92,246,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(139,92,246,.05) 1px,transparent 1px);
  background-size:42px 42px;
  -webkit-mask-image:radial-gradient(780px 480px at 74% 2%,#fff,transparent 70%);
  mask-image:radial-gradient(780px 480px at 74% 2%,#fff,transparent 70%);
  animation:heroGridDrift 28s linear infinite;
  will-change:background-position;
  pointer-events:none;
}
@keyframes heroGlowDrift{
  0%{transform:translate3d(0,0,0) scale(1)}
  50%{transform:translate3d(-3%,2%,0) scale(1.06)}
  100%{transform:translate3d(2%,-2%,0) scale(1.03)}
}
@keyframes heroGridDrift{
  0%{background-position:0 0}
  100%{background-position:42px 42px}
}
.auth-brand-inner{position:relative;z-index:1;max-width:480px;width:100%}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.76rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--primary-strong);font-family:var(--font-mono);
}
.eyebrow::before{
  content:"";width:22px;height:2px;background:var(--primary);border-radius:8px;
}

.auth-brand h2{
  font-size:clamp(2.05rem,3.4vw,2.85rem);
  margin:20px 0 22px;
  letter-spacing:-.03em;
  font-weight:800;
  color:var(--ink);
  font-family:var(--font-sans);
}
.auth-brand h2 em{
  font-style:normal;
  color:var(--primary-strong);
}
.auth-brand .tagline{
  font-size:1.05rem;
  color:var(--ink-2);
  max-width:35em;
  line-height:1.65;
}

.auth-brand-logo{
  display:block;
  margin:0 0 32px;
  line-height:0;
}
.auth-brand-logo img{
  width:auto;
  height:72px;
  max-width:220px;
  border-radius:0;
  object-fit:contain;
  object-position:left center;
  display:block;
  box-shadow:none;
  background:transparent;
}

.auth-brand-points{
  display:flex;flex-wrap:wrap;gap:8px;
  margin-top:30px;
}
.auth-brand-points .chip{
  display:inline-flex;align-items:center;gap:7px;
  padding:6px 12px;
  border:1px solid var(--border);
  border-radius:var(--radius);
  background:var(--bg);
  font-size:.82rem;font-weight:600;color:var(--ink-2);
  box-shadow:var(--shadow-sm);
}

.auth-brand-note{
  display:flex;align-items:center;gap:9px;
  margin-top:24px;
  font-size:.86rem;color:var(--ink-3);
}
.auth-brand-note .dot{
  width:7px;height:7px;border-radius:50%;
  background:var(--primary-strong);flex:0 0 auto;
}

/* 右侧表单区 */
.auth-panel{
  display:flex;
  align-items:center;
  justify-content:center;
  padding:48px var(--auth-gutter) 48px 40px;
  background:var(--bg);
}
.auth-card{
  width:100%;
  max-width:380px;
  padding:0;
  background:transparent;
  border:0;
  box-shadow:none;
}
.auth-card h1{
  font-size:1.4rem;
  font-weight:800;
  letter-spacing:-.02em;
  color:var(--ink);
  margin:0 0 6px;
}
.auth-card .lede{
  margin:0 0 22px;
  font-size:.92rem;
  color:var(--ink-2);
  line-height:1.5;
}
.auth-field{margin-bottom:12px}
.auth-field label{
  display:block;
  font-size:12.5px;
  font-weight:650;
  color:var(--ink);
  margin-bottom:5px;
}
.auth-field input{
  width:100%;
  height:42px;
  padding:0 12px;
  border:1px solid var(--muted);
  border-radius:var(--radius);
  font:inherit;
  font-size:14.5px;
  background:var(--surface);
  color:var(--ink);
  outline:none;
  transition:border-color .15s ease, box-shadow .15s ease, background .15s ease;
}
.auth-field input:focus{
  border-color:var(--primary-strong);
  background:#fff;
  box-shadow:0 0 0 3px rgba(124,58,237,.12);
}
.auth-field input[aria-invalid="true"]{border-color:var(--danger)}
.verify-row{display:flex;gap:8px}
.verify-row input{flex:1;min-width:0}
.verify-btn{
  flex-shrink:0;
  height:42px;
  padding:0 12px;
  border-radius:var(--radius);
  border:1px solid var(--border);
  background:var(--bg);
  color:var(--ink-2);
  font-size:12.5px;
  font-weight:650;
  cursor:pointer;
  white-space:nowrap;
}
.verify-btn:hover:not(:disabled){color:var(--ink);border-color:var(--muted);background:var(--surface)}
.verify-btn:disabled{opacity:.55;cursor:not-allowed}
.auth-error{
  display:none;
  background:#fef2f2;
  color:var(--danger);
  font-size:13px;
  padding:9px 11px;
  border-radius:var(--radius);
  margin-bottom:12px;
  line-height:1.4;
}
.auth-error.show{display:block}
.auth-agree{
  display:flex;
  align-items:flex-start;
  gap:8px;
  font-size:12px;
  color:var(--ink-3);
  margin:2px 0 14px;
  line-height:1.45;
}
.auth-agree input{margin-top:2px;flex-shrink:0}
.auth-agree a{color:var(--primary-strong);font-weight:650}
.auth-agree a:hover{text-decoration:underline;text-underline-offset:3px}
.auth-actions{display:flex;flex-direction:column;gap:8px;margin-top:2px}
.auth-actions .btn{min-height:44px;font-size:.95rem}
.auth-foot{
  margin-top:18px;
  text-align:center;
  font-size:14px;
  color:var(--ink-2);
}
.auth-foot a{color:var(--primary-strong);font-weight:650}
.auth-foot a:hover{text-decoration:underline;text-underline-offset:3px}
.auth-success{display:none;text-align:center;padding:8px 0}
.auth-success.show{display:block}
.auth-success .ok-icon{
  width:52px;height:52px;margin:0 auto 14px;border-radius:50%;
  background:var(--surface);border:1px solid var(--border);color:var(--primary-strong);
  display:flex;align-items:center;justify-content:center;
}
.auth-success h2{font-size:1.2rem;margin:0 0 8px}
.auth-success p{font-size:14px;color:var(--ink-2);margin:0 0 18px}

@media (max-width:960px){
  .auth-shell{
    --auth-gutter:max(16px, calc((100vw - min(1180px, calc(100vw - 32px))) / 2));
    grid-template-columns:1fr;
  }
  .auth-brand{
    min-height:auto;
    padding:40px var(--auth-gutter) 36px;
    border-right:0;
    border-bottom:1px solid var(--border);
    justify-content:flex-start;
  }
  .auth-brand h2{font-size:clamp(1.85rem,5.5vw,2.4rem)}
  .auth-panel{padding:32px var(--auth-gutter) 56px;align-items:flex-start}
  .auth-card{max-width:420px}
}

@media (max-width:480px){
  .auth-brand{padding:32px var(--auth-gutter) 28px}
  .auth-brand-logo img{height:56px;max-width:180px}
  .auth-panel{padding:28px var(--auth-gutter) 48px}
}

@media (prefers-reduced-motion:reduce){
  .auth-brand::before,.auth-brand::after{animation:none !important}
}