/* 用户认证页共享样式（登录/注册/找回密码） */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
:root{
    --primary:#5668EE;--primary-light:#6b7aef;
    --bg:#f5f6fa;--card-bg:#fff;--text-primary:#1a1d2e;
    --text-secondary:#7c8499;--text-info:#a0aec0;
    --border:#e8ecf1;--border-color:#e8ecf1;
    --danger:#e74c3c;--success:#67c23a;--warning:#e6a23c;
    --radius:12px;--radius-lg:20px;--shadow:0 4px 24px rgba(86,104,238,.08);
}
@media(prefers-color-scheme:dark){
    :root{--bg:#111318;--card-bg:#1a1d2e;--text-primary:#e8eaed;--text-secondary:#8b92a5;--text-info:#555d70;--border:#2a2d3e;--shadow:0 4px 24px rgba(0,0,0,.3);}
}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB',sans-serif;background:var(--bg);color:var(--text-primary);min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:20px;}

/* 顶部装饰 */
.auth-page{width:100%;max-width:420px;}
.auth-header{text-align:center;margin-bottom:32px;}
.auth-logo{width:64px;height:64px;border-radius:20px;background:linear-gradient(135deg,var(--primary),#7b5cff);display:inline-flex;align-items:center;justify-content:center;margin-bottom:16px;box-shadow:0 8px 32px rgba(86,104,238,.35);}
.auth-logo svg{width:36px;height:36px;color:#fff;}
.auth-header h1{font-size:26px;font-weight:700;letter-spacing:-.5px;margin-bottom:6px;}
.auth-header p{color:var(--text-secondary);font-size:14px;}

/* 卡片 */
.auth-card{background:var(--card-bg);border-radius:var(--radius-lg);padding:36px 32px 28px;box-shadow:var(--shadow);}

/* 表单 */
.form-group{margin-bottom:20px;}
.form-group label{display:block;font-size:13px;font-weight:600;color:var(--text-secondary);margin-bottom:8px;}
.form-input{
    width:100%;padding:12px 16px;border:1.5px solid var(--border);border-radius:10px;font-size:15px;
    background:var(--card-bg);color:var(--text-primary);outline:none;transition:border .25s;
}
.form-input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(86,104,238,.12);}
.form-input::placeholder{color:var(--text-info);}
.form-input.error{border-color:var(--danger);}
.input-hint{font-size:11px;color:var(--text-info);margin-top:4px;}

/* 记住密码 & 忘记密码 */
.form-options{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px;font-size:13px;}
.remember-me{display:flex;align-items:center;gap:6px;color:var(--text-secondary);cursor:pointer;}
.remember-me input[type="checkbox"]{accent-color:var(--primary);width:16px;height:16px;}
.forgot-link{color:var(--primary);text-decoration:none;font-weight:500;}
.forgot-link:hover{text-decoration:underline;}

/* 按钮 */
.btn-submit{
    width:100%;padding:13px;border:none;border-radius:10px;font-size:16px;font-weight:600;
    color:#fff;background:linear-gradient(135deg,var(--primary),#7b5cff);
    cursor:pointer;transition:.25s;letter-spacing:.5px;
}
.btn-submit:hover{transform:translateY(-1px);box-shadow:0 6px 24px rgba(86,104,238,.4);}
.btn-submit:active{transform:translateY(0);}
.btn-submit:disabled{opacity:.65;cursor:not-allowed;transform:none!important;}

.msg-tip{padding:11px 14px;border-radius:8px;font-size:13px;margin-top:16px;display:none;text-align:center;line-height:1.5;}
.msg-success{background:rgba(103,194,58,.08);color:#67c23a;display:block;}
.msg-error{background:rgba(245,108,108,.08);color:#f56c6c;display:block;}
.msg-warning{background:rgba(230,162,60,.08);color:#e6a23c;display:block;}

/* 密码强度 */
.pwd-strength{display:flex;gap:4px;margin-top:6px;}
.pwd-strength span{height:3px;flex:1;border-radius:2px;background:var(--border);transition:background .3s;}
.pwd-strength.weak span:nth-child(1){background:#f56c6c;}
.pwd-strength.medium span:nth-child(1),.pwd-strength.medium span:nth-child(2){background:#e6a23c;}
.pwd-strength.strong span{background:#67c23a;}

/* 提示信息块（找回密码页） */
.info-block{background:rgba(86,104,238,.05);border:1px solid rgba(86,104,238,.12);border-radius:10px;padding:16px;margin-bottom:22px;font-size:13px;color:var(--text-secondary);line-height:1.6;}
.info-block strong{color:var(--primary);}

/* 分割线 */
.divider{display:flex;align-items:center;justify-content:center;gap:14px;margin:24px 0;color:var(--text-info);font-size:15px;font-weight:500;}
.divider::before,.divider::after{flex:1;height:1px;background:var(--border);}

/* 底部链接 */
.auth-footer{text-align:center;margin-top:24px;color:var(--text-secondary);font-size:14px;}
.auth-footer a{color:var(--primary);text-decoration:none;font-weight:600;}
.auth-footer a:hover{text-decoration:underline;}
.back-home{position:absolute;top:20px;left:20px;display:inline-flex;align-items:center;gap:6px;padding:8px 18px;border:1.5px solid var(--border);border-radius:10px;background:var(--card-bg);color:var(--text-secondary);text-decoration:none;font-size:14px;font-weight:500;box-shadow:0 2px 8px rgba(0,0,0,.06);transition:all .25s;}
.back-home:hover{color:var(--primary);border-color:var(--primary);box-shadow:0 4px 16px rgba(86,104,238,.15);transform:translateY(-1px);}

/* 加载动画 */
@keyframes spin{to{transform:rotate(360deg);}}
.loading-icon{display:inline-block;width:16px;height:16px;border:2.5px solid #fff;border-radius:50%;border-top-color:transparent;animation:spin .6s linear infinite;vertical-align:middle;margin-right:6px;}

/* ============ 第三方登录（QQ / 微信扫码） ============ */
.social-login{display:flex;gap:12px;margin-top:20px;}
.btn-social{
    flex:1;padding:11px 12px;border:1.5px solid var(--border);border-radius:10px;font-size:14px;font-weight:600;
    background:var(--card-bg);color:var(--text-primary);cursor:pointer;transition:.2s;display:flex;align-items:center;justify-content:center;gap:6px;
}
.btn-social:hover{transform:translateY(-1px);box-shadow:0 4px 14px rgba(0,0,0,.08);}
.btn-social:active{transform:translateY(0);}
.btn-social-qq{border-color:#12b7f5;color:#12b7f5;}
.btn-social-qq:hover{background:rgba(18,183,245,.08);}
.btn-social-wx{border-color:#07c160;color:#07c160;}
.btn-social-wx:hover{background:rgba(7,193,96,.08);}
/* 后台关闭时隐藏（由 JS 根据配置移除） */
.social-login.is-hidden{display:none;}

/* 微信扫码弹窗 */
.modal-mask{display:none;position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:1000;align-items:center;justify-content:center;}
.modal-box{background:var(--card-bg);border-radius:16px;padding:24px;width:320px;max-width:92vw;box-shadow:0 20px 60px rgba(0,0,0,.3);}
.modal-title{display:flex;justify-content:space-between;align-items:center;font-size:16px;font-weight:700;margin-bottom:16px;color:var(--text-primary);}
.modal-close{border:none;background:transparent;font-size:22px;line-height:1;color:var(--text-secondary);cursor:pointer;}
.wx-qr-frame{width:100%;height:340px;border:none;background:#fff;border-radius:8px;}
.modal-tip{margin-top:12px;text-align:center;font-size:13px;color:var(--text-secondary);}