* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "Microsoft Yahei", Arial, sans-serif;
        }
        body {
            background-color: #f8f9fa;
            padding: 20px;
        }
        .container {
            max-width: 550px;
            margin: 50px auto;
            background: #fff;
            padding: 40px 30px;
            border-radius: 10px;
            box-shadow: 0 2px 15px rgba(0,0,0,0.08);
        }
        h1 {
            text-align: center;
            color: #333;
            margin-bottom: 30px;
            font-size: 24px;
            font-weight: 600;
        }
        .form-group {
            margin-bottom: 25px;
        }
        label {
            display: block;
            margin-bottom: 8px;
            color: #555;
            font-weight: 500;
            font-size: 15px;
        }
        input {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: 6px;
            font-size: 16px;
            transition: all 0.3s ease;
        }
        input:focus {
            outline: none;
            border-color: #2563eb;
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }
        input::placeholder {
            color: #999;
            font-size: 14px;
        }
        button {
            width: 100%;
            padding: 14px;
            background-color: #2563eb;
            color: #fff;
            border: none;
            border-radius: 6px;
            font-size: 16px;
            font-weight: 500;
            cursor: pointer;
            transition: background-color 0.3s ease;
        }
        button:hover {
            background-color: #1d4ed8;
        }
        button:disabled {
            background-color: #94a3b8;
            cursor: not-allowed;
        }


.result {
    margin-top: 30px;
    padding: 18px 24px; /* 增加左右内边距，让内容更美观 */
    border-radius: 6px;
    font-size: 17px;
    text-align: left; /* 将居中对齐改为左对齐 */
    display: none;
}
      
        .success {
            background-color: #dcfce7;
            color: #166534;
            border: 1px solid #bbf7d0;
        }
        .error {
            background-color: #fee2e2;
            color: #991b1b;
            border: 1px solid #fecaca;
        }
        .loading {
            text-align: center;
            margin-top: 20px;
            display: none;
            color: #2563eb;
            font-size: 15px;
        }
        .loading::after {
            content: "";
            display: inline-block;
            width: 16px;
            height: 16px;
            border: 2px solid #2563eb;
            border-top-color: transparent;
            border-radius: 50%;
            margin-left: 8px;
            animation: spin 1s linear infinite;
        }
        @keyframes spin {
            to { transform: rotate(360deg); }
        }