* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    font-family: "Segoe UI", sans-serif;
    background: linear-gradient(135deg, #4facfe, #00f2fe);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.login-container {
    background: #fff;
    padding: 40px 35px;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    width: 350px;
    text-align: center;
    animation: fadeIn 0.6s ease;
    z-index: 2;
}

.login-container h2 {
    margin-bottom: 25px;
    font-weight: 600;
    color: #333;
}

.input-group {
    margin-bottom: 20px;
    text-align: left;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    color: #555;
}

.input-group input {
    width: 100%;
    padding: 10px 12px;
    border-radius: 8px;
    border: 1px solid #ddd;
    outline: none;
    transition: 0.3s;
    font-size: 14px;
}

.input-group input:focus {
    border-color: #4facfe;
    box-shadow: 0 0 6px rgba(79, 172, 254, 0.5);
}

.btn {
    background: linear-gradient(135deg, #4facfe, #00f2fe);
    border: none;
    color: white;
    padding: 12px;
    width: 100%;
    border-radius: 8px;
    font-size: 15px;
    cursor: pointer;
    transition: 0.3s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
}

.footer-text {
    margin-top: 15px;
    font-size: 13px;
    color: #777;
}

.footer-text a {
    color: #4facfe;
    text-decoration: none;
}

.footer-text a:hover {
    text-decoration: underline;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 加载遮罩 */
.loading-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.7);
    justify-content: center;
    align-items: center;
    z-index: 9998;
}

.loading-overlay.active {
    display: flex;
}

.spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #4facfe;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

::-webkit-scrollbar {
    background: #00000000;
    width: 0px;
}

.bottom {
    position: absolute;
    bottom: 30px;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: flex-end;
    color: rgb(235 74 74);
    font-size: medium;
    font-weight: bold;
    z-index: 1;
}