/* ============================================================
   登录 / 注册 / 找回密码 页面样式
   ============================================================ */

:root{
  --bg:#f6f7f9;
  --surface:#ffffff;
  --border:#e4e7ec;
  --border-strong:#d0d5dd;
  --text:#101828;
  --text-2:#475467;
  --text-3:#667085;
  --text-4:#98a2b3;
  --primary:#1d4ed8;
  --primary-hover:#1e40af;
  --primary-soft:#eff4ff;
  --success:#067647;
  --success-soft:#ecfdf3;
  --danger:#b42318;
  --danger-soft:#fef3f2;
  --radius:10px;
  --radius-sm:6px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
body{
  margin:0;min-height:100vh;background:var(--bg);color:var(--text);
  font-family:var(--font);font-size:14px;line-height:1.5;
  display:flex;align-items:center;justify-content:center;padding:24px;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{margin:0;font-weight:600}
p{margin:0}
svg{display:inline-block;vertical-align:-2px}

/* 卡片 */
.login-box,.auth-box{
  width:100%;max-width:400px;background:var(--surface);
  border:1px solid var(--border);border-radius:var(--radius);
  padding:28px;box-shadow:0 1px 2px rgba(16,24,40,.05);
}
.auth-box{padding:0;overflow:hidden}

/* 头部 */
.login-logo{text-align:center;margin-bottom:22px}
.login-logo .icon{
  width:44px;height:44px;border-radius:10px;background:var(--primary-soft);color:var(--primary);
  display:flex;align-items:center;justify-content:center;margin:0 auto 12px;
}
.login-logo h1{font-size:19px;letter-spacing:-.01em}
.login-logo p{font-size:13px;color:var(--text-3);margin-top:4px}

.auth-header{padding:28px 28px 0;text-align:center;background:none;color:inherit}
.auth-logo{width:44px;height:44px;border-radius:10px;background:var(--primary-soft);color:var(--primary);display:flex;align-items:center;justify-content:center;margin:0 auto 12px}
.auth-header h1{font-size:19px;letter-spacing:-.01em}
.auth-header p{font-size:13px;color:var(--text-3);margin-top:4px}
.auth-header .back-home{
  display:inline-block;margin-top:10px;font-size:12px;color:var(--text-4);text-decoration:none;
}
.auth-header .back-home:hover{color:var(--text-2);text-decoration:none}

/* 标签 */
.auth-tabs{display:flex;border-bottom:1px solid var(--border);margin:20px 28px 0;background:none}
.auth-tab{
  flex:1;padding:10px 0;text-align:center;font-size:14px;color:var(--text-3);
  cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-1px;
}
.auth-tab:hover{color:var(--text)}
.auth-tab.active{color:var(--primary);border-bottom-color:var(--primary);font-weight:500}

.auth-body{padding:20px 28px 24px}
.auth-footer{
  padding:14px 28px;border-top:1px solid var(--border);background:var(--bg);
  text-align:center;font-size:13px;color:var(--text-3);
}
.auth-footer a{font-weight:500}

/* 表单 */
.form-group{margin-bottom:16px}
.form-label{display:block;font-size:13px;font-weight:500;color:var(--text-2);margin-bottom:6px}
.form-input{
  width:100%;height:40px;padding:0 11px;border:1px solid var(--border-strong);border-radius:var(--radius-sm);
  background:#fff;color:var(--text);font-size:14px;font-family:inherit;outline:none;
  transition:border-color .12s,box-shadow .12s;
}
.form-input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(29,78,216,.12)}
.form-input::placeholder{color:var(--text-4)}
.captcha-group{display:flex;gap:10px;align-items:stretch}
.captcha-group .form-input{flex:1;min-width:0}
.captcha-img{height:40px;border-radius:var(--radius-sm);border:1px solid var(--border-strong);cursor:pointer;flex:none}
.captcha-img:hover{border-color:var(--border)}

.btn,.btn-login,.btn-primary{
  display:flex;align-items:center;justify-content:center;width:100%;height:40px;
  margin-top:4px;border:1px solid var(--primary);border-radius:var(--radius-sm);
  background:var(--primary);color:#fff;font-size:14px;font-weight:500;font-family:inherit;
  cursor:pointer;text-align:center;text-decoration:none;
}
.btn:hover,.btn-login:hover,.btn-primary:hover{background:var(--primary-hover);text-decoration:none}
.btn:disabled{opacity:.6;cursor:not-allowed}

/* 提示 */
.alert,.login-error{
  display:flex;align-items:flex-start;gap:9px;padding:10px 12px;border-radius:var(--radius-sm);
  font-size:13px;margin-bottom:16px;border:1px solid transparent;
}
.alert-error,.login-error{background:var(--danger-soft);border-color:rgba(180,35,24,.16);color:var(--danger)}
.alert-success{background:var(--success-soft);border-color:rgba(6,118,71,.16);color:var(--success)}
.alert-icon,.error-icon{flex:none;display:flex;margin-top:1px}
.login-error .error-icon{display:none}
.error-text{flex:1}
.login-error{animation:none}

/* 返回链接 */
.back-home{
  display:block;text-align:center;margin-top:18px;font-size:13px;color:var(--text-3);text-decoration:none;
}
.back-home:hover{color:var(--text);text-decoration:none}

/* 成功页 */
.success-overlay{
  position:fixed;inset:0;background:var(--bg);display:flex;align-items:center;justify-content:center;padding:24px;z-index:100;
}
.success-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:32px 28px;text-align:center;width:100%;max-width:360px;
}
.success-icon,.success-icon-big{
  width:52px;height:52px;border-radius:50%;background:var(--success-soft);color:var(--success);
  display:flex;align-items:center;justify-content:center;margin:0 auto 16px;font-size:22px;
}
.success-icon svg,.success-icon-big svg{width:24px;height:24px}
.success-title,.success-title-big{font-size:18px;margin-bottom:6px}
.success-desc,.success-desc-big{font-size:13px;color:var(--text-3);margin-bottom:18px}
.success-countdown{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--text-3)}
.success-countdown .count-num{font-weight:600;color:var(--primary)}
.success-progress{height:3px;background:var(--border);border-radius:2px;margin-top:16px;overflow:hidden}
.success-progress-bar{height:100%;background:var(--primary);width:100%;transform-origin:left;animation:progress 2s linear forwards}
@keyframes progress{from{transform:scaleX(1)}to{transform:scaleX(0)}}

/* 注册成功提示 */
.success-page{text-align:center;padding:16px 0}
.success-title{font-size:18px;margin-bottom:6px}
.success-desc{font-size:13px;color:var(--text-3)}
.loading-dots{display:inline-flex;gap:4px;margin-top:12px}
.loading-dots span{width:6px;height:6px;border-radius:50%;background:var(--primary);animation:bounce 1.2s infinite ease-in-out both}
.loading-dots span:nth-child(2){animation-delay:-.16s}
.loading-dots span:nth-child(3){animation-delay:-.32s}
@keyframes bounce{0%,80%,100%{transform:scale(.4);opacity:.5}40%{transform:scale(1);opacity:1}}

/* 密码强度 */
.password-strength{height:3px;background:var(--border);border-radius:2px;margin-top:8px;overflow:hidden;display:none}
.password-strength-bar{height:100%;width:0;transition:width .2s}
.strength-weak{background:var(--danger);width:33%}
.strength-medium{background:#b54708;width:66%}
.strength-strong{background:var(--success);width:100%}

@media (max-width:480px){
  body{padding:12px}
  .login-box{padding:22px}
  .auth-header{padding:22px 20px 0}
  .auth-tabs{margin:16px 20px 0}
  .auth-body{padding:16px 20px 20px}
  .auth-footer{padding:12px 20px}
}