/* UserHub 后台登录页样式 */
*{box-sizing:border-box;margin:0;padding:0}
body{background:linear-gradient(135deg,#1a73e8 0%,#0d47a1 100%);min-height:100vh;display:flex;align-items:center;justify-content:center;font-family:'Microsoft YaHei',Arial,sans-serif}
.card{background:#fff;border-radius:12px;padding:40px 44px;width:360px;box-shadow:0 20px 60px rgba(0,0,0,.2)}
.logo{text-align:center;margin-bottom:28px}
.logo h1{font-size:22px;color:#1a73e8;font-weight:700}
.logo p{font-size:12px;color:#999;margin-top:4px}
.form-group{margin-bottom:18px}
.form-group label{display:block;font-size:13px;color:#555;margin-bottom:6px;font-weight:600}
.form-group input{width:100%;border:1px solid #ddd;border-radius:8px;padding:11px 14px;font-size:14px;outline:none;transition:border .2s}
.form-group input:focus{border-color:#1a73e8;box-shadow:0 0 0 3px rgba(26,115,232,.12)}
.captcha-row{display:flex;gap:10px}
.captcha-row input{flex:1}
.captcha-row img{height:42px;border-radius:8px;cursor:pointer;border:1px solid #ddd}
.btn{width:100%;padding:12px;background:#1a73e8;color:#fff;border:none;border-radius:8px;font-size:15px;cursor:pointer;font-weight:600;margin-top:6px;transition:background .2s}
.btn:hover{background:#1557b0}
.alert{background:#fce8e6;color:#c5221f;border-radius:6px;padding:10px 14px;font-size:13px;margin-bottom:16px}
/* 图标通用样式 */
.icon{display:inline-block;vertical-align:middle}
.icon-md{width:16px;height:16px}
.icon-xl{width:24px;height:24px}
.icon-mr-4{margin-right:4px}