* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Arial', sans-serif;
        }

        /* 修复SweetAlert2的body class问题 */
        body.swal2-shown:not(.swal2-no-backdrop):not(.swal2-toast-shown) {
            overflow: hidden !important;
        }
        
        body.swal2-height-auto {
            height: auto !important;
        }
        
        /* 确保在没有弹窗时恢复正常状态 */
        body:not(.swal2-shown) {
            overflow: visible !important;
            height: 100vh !important;
        }

        body {
            background: linear-gradient(135deg, #1e3c72 0, #2a5298 100%);
            height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            overflow: hidden;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        .login-container {
            position: relative;
            width: 400px;
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
            border-radius: 20px;
            padding: 40px;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
            z-index: 10;
            overflow: hidden;
            animation: fadeIn .8s ease-out;
        }

        .login-container::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: linear-gradient(to bottom right, rgba(255, 255, 255, 0.1) 0, rgba(255, 255, 255, 0) 50%);
            transform: rotate(30deg);
            z-index: -1;
        }

        .login-header h2 {
            color: #fff;
            text-align: center;
            margin-bottom: 30px;
            font-size: 28px;
            font-weight: 600;
            letter-spacing: 1px;
        }

        .form-group {
            position: relative;
            margin-bottom: 30px;
        }

        .form-group input {
            width: 100% !important;
            padding: 15px 20px !important;
            background: rgba(255, 255, 255, 0.1) !important;
            border: 0 !important;
            border-radius: 50px !important;
            color: #fff !important;
            font-size: 16px !important;
            outline: 0 !important;
            transition: all .3s ease !important;
        }

        .form-group input:focus {
            background: rgba(255, 255, 255, 0.2) !important;
            box-shadow: 0 0 10px rgba(0, 195, 255, 0.5) !important;
        }

        .form-group label {
            position: absolute;
            top: 15px;
            left: 20px;
            color: rgba(255, 255, 255, 0.7);
            font-size: 16px;
            pointer-events: none;
            transition: all .3s ease;
        }

        .form-group input:focus + label,
        .form-group input:valid + label {
            top: -20px;
            left: 15px;
            font-size: 12px;
            background: linear-gradient(to right, #00c6ff, #0072ff);
            padding: 2px 10px;
            color: #fff;
            border-radius: 20px;
            transform: scale(0.9);
            opacity: 0;
            animation: labelRise 0.3s ease-out forwards;
        }

        @-webkit-keyframes labelRise {
            0% {
                opacity: 0;
                -webkit-transform: translateY(10px) scale(1);
                transform: translateY(10px) scale(1);
            }
            100% {
                opacity: 1;
                -webkit-transform: translateY(0) scale(0.9);
                transform: translateY(0) scale(0.9);
            }
        }
        @keyframes labelRise {
            0% {
                opacity: 0;
                -webkit-transform: translateY(10px) scale(1);
                transform: translateY(10px) scale(1);
            }
            100% {
                opacity: 1;
                -webkit-transform: translateY(0) scale(0.9);
                transform: translateY(0) scale(0.9);
            }
        }



        #captcha {
            margin-bottom: 20px;
        }

        .submit-btn {
            width: 100%;
            padding: 15px;
            background: linear-gradient(to right, #00c6ff, #0072ff);
            border: 0;
            border-radius: 50px;
            color: white;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all .3s ease;
            box-shadow: 0 5px 15px rgba(0, 114, 255, 0.4);
        }

        .submit-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(0, 114, 255, 0.6);
        }

        .auth-links {
            text-align: center;
            margin-top: 20px;
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
        }

        .auth-links a {
            color: #00c6ff;
            text-decoration: none;
            transition: all .3s ease;
        }

        .auth-links a:hover {
            color: #fff;
            text-decoration: underline;
        }

        .bubbles {
            position: fixed;
            width: 100%;
            height: 100%;
            z-index: 1;
            overflow: hidden;
            top: 0;
            left: 0;
        }

        .bubble {
            position: absolute;
            bottom: -100px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            animation: rise 10s infinite ease-in;
        }

        .bubble:nth-child(1) {
            width: 40px;
            height: 40px;
            left: 10%;
            animation-duration: 8s;
        }

        .bubble:nth-child(2) {
            width: 20px;
            height: 20px;
            left: 20%;
            animation-duration: 5s;
            animation-delay: 1s;
        }

        .bubble:nth-child(3) {
            width: 50px;
            height: 50px;
            left: 35%;
            animation-duration: 7s;
            animation-delay: 2s;
        }

        .bubble:nth-child(4) {
            width: 80px;
            height: 80px;
            left: 50%;
            animation-duration: 11s;
            animation-delay: 0s;
        }

        .bubble:nth-child(5) {
            width: 35px;
            height: 35px;
            left: 55%;
            animation-duration: 6s;
            animation-delay: 1s;
        }

        .bubble:nth-child(6) {
            width: 45px;
            height: 45px;
            left: 65%;
            animation-duration: 8s;
            animation-delay: 3s;
        }

        .bubble:nth-child(7) {
            width: 25px;
            height: 25px;
            left: 75%;
            animation-duration: 7s;
            animation-delay: 2s;
        }

        .bubble:nth-child(8) {
            width: 60px;
            height: 60px;
            left: 85%;
            animation-duration: 9s;
            animation-delay: 1s;
        }

        @keyframes rise {
            0% {
                transform: translateY(0) rotate(0deg);
                opacity: 1;
            }
            100% {
                transform: translateY(-1000px) rotate(720deg);
                opacity: 0;
            }
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }