html {height: 100%}  body.signin {background: linear-gradient(135deg, #196eed 0%, #041c40 100%);color: #d1cfcf;font-family: 'Poppins', sans-serif;}  .signinpanel {display: flex;justify-content: center;align-items: center;height: 100vh;}  .signin-info {text-align: center;margin-bottom: 1.5rem;}  .signin-info .logopanel {font-size: 2.3rem;font-weight: bold; /*登陆窗口字体“投放平台”着色*/color: rgb(18, 228, 190);}  .signin-info .logopanel span { /*登陆标题颜色：字体“融屏”着色*/color: #ffffff;}  .form-control {background: rgb(56, 109, 165);border: none;border-radius: 25px;color: #d1cfcf;padding: 12px 20px;margin-bottom: 1.5rem;transition: all 0.3s ease;}  .form-control:focus {background: rgb(255, 255, 255);box-shadow: 0 0 10px rgb(101, 41, 52);}  .btn-success {background: linear-gradient(135deg, #0e3978 0%, #196eed 100%);border: none;border-radius: 25px;padding: 12px 20px;font-weight: bold;transition: all 0.3s ease;}  .btn-success:hover {transform: translateY(-2px);box-shadow: 0 5px 15px rgba(0, 255, 204, 0.4);}  .imgcode {border-radius: 10px;cursor: pointer;transition: transform 0.3s ease;}  .imgcode:hover {transform: scale(1.05);}  .checkbox-custom {margin-top: 1rem;}  .checkbox-custom label {color: #ffffff;}  footer {position: fixed;bottom: 0;width: 100%;text-align: center;padding: 2rem 0;font-size: 1.5rem;color: rgb(178, 179, 181);
}